US20020182072A1 - Seal device - Google Patents
Seal device Download PDFInfo
- Publication number
- US20020182072A1 US20020182072A1 US10/158,289 US15828902A US2002182072A1 US 20020182072 A1 US20020182072 A1 US 20020182072A1 US 15828902 A US15828902 A US 15828902A US 2002182072 A1 US2002182072 A1 US 2002182072A1
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- US
- United States
- Prior art keywords
- seal device
- base member
- seal
- elastic member
- retainer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1081—Casings, housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring
Definitions
- the present invention relates to a seal device and more particularly to a lip seal for sealing a gap around a drive shaft of a compressor for use in an air conditioner and a gasket for sealing a joint between housing members
- Japanese Unexamined Utility Model publication No.5-30637 discloses one of seal devices.
- the seal device has a base member, or a housing of an oil seal, and an elastic member, or a lip seal made of rubber.
- the base member is made of a metal plate.
- the end of the elastic member is fixed to the base member with a reinforcement member and another seal member made of synthetic resin by caulking or by bending the part of base member.
- the elastic member Since the elastic member is pliant and easily deforms, generally the end of the elastic member fixedly adheres to the base member by means of an adhesive material.
- a seal device has a base member and an elastic member.
- the elastic member adheres to the base member so as to cover substantially the entire surface of the base member without any adhesive material.
- FIG. 1 is a partially schematic view of a lip seal according to a first embodiment of the present invention
- FIG. 2 is a partially schematic view of a lip seal according to a second embodiment of the present invention.
- FIG. 3A is a partially cross-sectional view of an annular base according to another embodiment of the present invention.
- FIG. 3B is a partially cross-sectional view taken along the line I-I in FIG. 3A;
- FIG. 4A is a partially cross-sectional view of a compressor with a gasket
- FIG. 4B is a partially enlarged schematic cross-sectional view of the gasket.
- FIG. 4C is an end view of the gasket.
- FIG. 1 A first embodiment of the present invention will now be described with reference to FIG. 1.
- the front side and the rear side correspond to the left side and the right side in FIG. 1, respectively.
- an annular retainer 12 , a first seal member 13 , a second seal member 14 and a back-up ring 15 constitute a lip seal 11 .
- the retainer 12 or a base member is made of a metal plate.
- the first seal member 13 or an elastic member is made of rubber.
- the second seal member 14 is made of synthetic resin.
- the back-up ring 15 or a reinforcement member is made of a metal plate.
- the first seal member 13 is made of synthetic rubber such as acrylonitrile butadiene rubber, and is annular in shape. Besides, the spring hardness Hs of the synthetic rubber is preferably 75 or above based on stability of shape, and is more preferably 80 or above, and is much more preferably 85 or above.
- the second seal member 14 is made of fluororesin such as polytetrafluoroethylene (PTFE), and is annular in shape.
- the cross section of the back-up ring 15 is substantially L-shaped, and the back-up ring 15 is constituted of a cylindrical portion 15 A and an extended portion 15 B, which extends from the rear end of the cylindrical portion 15 A toward the central axis of the lip seal 11 .
- the cross section of the retainer 12 is substantially U-shaped.
- the retainer 12 includes a cylindrical portion 12 A, an annular front extended portion 12 B and an annular rear extended portion 12 C.
- the cylindrical portion 12 A includes a cylindrical surface along the direction of the central axis of the retainer 12 .
- the front extended portion 12 B and the rear extended portion 12 C respectively extend from the front end of the cylindrical portion 12 A and the rear end of the cylindrical portion 12 A toward the central axis of the retainer 12 .
- Substantially the entire surface of the retainer 12 is formed within the first seal member 13 by insert mold. Strictly, in the retainer 12 , the entire surface of the cylindrical portion 12 A, the entire surface of the rear extended portion 12 C and the front end of the front extended portion 12 B are covered with the elastic member, which constitutes the first seal member 13 . The first seal member 13 adheres to the retainer 12 without any adhesive material.
- a plurality of through holes 12 D is formed to extend through the retainer 12 in thickness.
- the elastic member which constitutes the first seal member 13 , occupies the through holes 12 D, and the elastic member on each side of the retainer 12 interconnects through the through holes 12 D.
- the first seal member 13 includes an annular base 13 A and an annular lip portion 13 B.
- the base 13 A accommodates the retainer 12 .
- the lip portion 13 B extends from the base 13 A.
- Parts of outer peripheries of the back-up ring 15 and the second seal member 14 are respectively accommodated in front and rear in a space surrounded by the part of first seal member 13 covering the inner surface (the lower surface in FIG. 1) of the cylindrical portion 12 A and the front end surface of the rear extended portion 12 C and also by the front extended portion 12 B of the retainer 12 .
- a protrusion is formed on the front surface of the rear extended portion 12 C of the first seal member 13 .
- the second seal member 14 and the back-up ring 15 are fixedly caulked such that the protrusion and the front extended portion 12 B sandwich the second seal member 14 and the back-up ring 15 .
- the second seal member 14 and the back-up ring 15 are assembled to the retainer 12 and the first seal member 13 without any adhesive material such that the second seal member 14 and the back-up ring 15 can be disassembled from the retainer 12 and the first seal member 13 .
- a sliding surface 14 A of the second seal member 14 with respect to a rotary shaft 16 provides a spiral groove 14 B, which functions to return lubricant oil to a sealed region A.
- the lip seal 11 is installed to a compressor such that a protrusion formed on the base 13 A abuts against the inner surface of a seal chamber 18 , which is defined in a housing 17 of the compressor. Also, the lip seal 11 is supported by the housing 17 , and is assembled to the compressor such that the end of the lip portion 13 B of the first seal member 13 and the sliding surface 14 A of the second seal member 14 abut against the outer circumferential surface of the rotary shaft 16 , which is inserted through the seal members 13 , 14 .
- the protrusions respectively formed on the outer periphery of the base 13 A and on the first seal member 13 covering the front surface of the rear extended portion 12 C ensure relatively high sealing performance. Therefore, no elastic member is interposed between the front end of the cylindrical portion 15 A and the rear surface of the front extended portion 12 B. Nevertheless, sealing performance of the lip seal 11 is not deteriorated.
- the first seal member 13 adheres to substantially the entire surface of the retainer 12 without any adhesive material. Thereby, the first seal member 13 is easily removed from the retainer 12 . Therefore, the first seal member 13 and the retainer 12 are easily recycled.
- the retainer 12 is made of metal plate. Therefore, relatively high heat-resistance of the base member is easily ensured. For example, the retainer 12 made of metal plate is inhibited from deforming under conditions of relatively high temperature, as compared with the retainer 12 made of resin. Thereby, the retainer 12 made of metal plate tends to be utilized under conditions of relatively high temperature. In addition, in view of gas permeation performance, the retainer 12 made of metal is more efficient than that made of resin.
- the first seal member 13 is formed by insert mold. Thereby, the lip seal 11 is easily mass-produced. Namely, manufacturing cost is reduced.
- the retainer 12 forms the plurality of through holes 12 D, which extends in thickness, and the first seal member 13 formed on each side of the retainer 12 interconnects through the through holes 12 D. Thereby, the first seal member 13 is inhibited from being removed.
- FIG. 2 A second embodiment of the present invention will now be described with reference to FIG. 2.
- the front side and the rear side correspond to the left side and the right side in FIG. 2, respectively.
- the structure of the lip seal in the first embodiment is modified in the second embodiment.
- the structure other than the lip seal is similar to that in the first embodiment. Therefore, only the structure different from that in the first embodiment will be described.
- the same reference numerals denote the similar components to those in the first embodiment.
- An annular case 21 , a first seal member 22 , a second seal member 23 and a back-up ring 24 constitute a lip seal 20 .
- the annular case 21 is made of metal plate.
- the first seal member 22 or an elastic member is made of rubber.
- the second seal member 23 is made of resin.
- the back-up ring 24 or a reinforcement member is made of metal.
- the first seal member 22 is made of synthetic rubber such as acrylonitrile butadiene rubber, and is annular in shape.
- the second seal member 23 is made of fluororesin such as polytetrafluoroethylene PTFE, and is annular in shape.
- the back-up ring 24 is annular disk-shaped.
- the cross section of the case 21 is substantially S-shaped.
- the case 21 includes an outer cylindrical portion 21 A or an outermost outside diameter portion, which includes a cylindrical surface along the direction of the central axis of the case 21 .
- An annular front extended portion 21 B and an annular rear extended portion 21 C respectively extend from the front end and the rear end of the outer cylindrical portion 21 A.
- an annular O-ring case 21 D extends frontward from the radially inner end of the front extended portion 21 B.
- the parts of outer peripheries of the back-up ring 24 , the second seal member 23 and the first seal member 22 are accommodated in order from the front side in a reentrant 21 E, which is formed by the outer cylindrical portion 21 A, the front and the rear extended portions 21 B, 21 C.
- the first and the second seal members 22 , 23 and the back-up ring 24 are fixedly caulked such that the front and the rear extended portions 21 B, 21 C sandwich the first and the second seal members 22 , 23 and the back-up ring 24 .
- the first and the second seal members 22 , 23 and the back-up ring 24 are assembled to the case 21 without any adhesive material such that the first and the second seal members 22 , 23 and the back-up ring 24 can be disassembled from the case 21 .
- An annular retainer 25 or a base member made of metal plate is covered with the first seal member 22 by insert mold, and is arranged in the first seal member 22 adjacent to the outer periphery.
- the part of retainer 25 is arranged to receive force due to caulking.
- a plurality of through holes 25 A is formed to extend through the retainer 25 in thickness (the front and the rear direction in FIG. 2).
- the elastic member constituting the first seal member 22 occupies the through holes 25 A.
- the elastic member formed on each side of the retainer 25 interconnects through the through holes 25 A. Therefore, the first seal member 22 adheres to the retainer 25 without any adhesive material.
- a sliding surface 23 A of the second seal member 23 with respect to the rotary shaft 16 forms a spiral groove 23 B, which functions to return lubricant oil to the sealed region A.
- An O-ring 26 is fitted in an annular reentrant, which is formed by the front extended portion 21 B and the O-ring case 21 D.
- the O-ring 26 seals a gap between the wall surface of the seal chamber 18 and the outer periphery of the case 21 , and the end of the first seal member 22 and the sliding surface 23 A of the second seal member 23 close to the outer circumferential surface of the rotary shaft 16 . Thereby, a gap around the rotary shaft 16 is sealed.
- the part of retainer 25 is arranged to receive force due to caulking.
- the elastic member of the first seal member 22 on each side of the retainer 25 is relatively thin, pressure applied to the elastic member of the first seal member 22 by caulking tends to be relatively large. Therefore, sealing performance on the elastic member of the first seal member 22 on each side of the retainer 25 improves.
- the base member or the retainer 12 , 25 forms the through holes 12 D, 25 A, which extend in thickness.
- the elastic member or the first seal member 13 , 22 formed on each side of the base member interconnects through the through holes 12 D, 25 A.
- grooves may be recessed such that the elastic members formed on each side of the base member respectively occupy the grooves, as shown in FIGS. 3A, 3B.
- a plurality of grooves 41 (only one groove on each side of the base member shown in FIG. 3) in place of the through holes 12 D is recessed on each side of a retainer 40 .
- each groove 41 is wider than the opening, and the cross section of each groove 41 is substantially rectangular in shape, as shown in FIG. 3B.
- the grooves 41 continuously extend from the radially inner end of the front extended portion 40 A toward the radially inner end of the rear extended portion 40 B on the front extended portion 40 A and the rear extended portion 40 B, respectively. In such a state, even when the elastic member adheres to the surface of the retainer 40 without any adhesive material, the part of elastic member occupies the grooves 41 . Thereby, the elastic member is inhibited from being removed from the retainer 40 .
- the base member or the retainer 12 , 25 may form the through holes, which extend in thickness, and the grooves, which are occupied by the part of elastic member, on each side of the base member.
- a through hole 12 D, 25 A formed through the base member or the retainer 12 , 25 may be omitted.
- the spiral groove 14 B, 23 B formed on the second seal member may be omitted.
- the elastic member or the first seal member 13 , 22 is formed by insert mold.
- the elastic member may adhere to the base member or the retainer 12 , 25 by a process other than insert mold.
- the base members 12 , 25 are made of plate material.
- the base members may be made of material other than the plate material.
- a retainer made of a wire rod the cross section of which is rectangular or circular in shape, may be utilized in place of the retainer 25 made of metal plate.
- the above-mentioned structure of the seal device may be applied to a gasket.
- the structure is applied to a gasket 33 of a valve plate assembly 32 , which is interposed between a rear housing 31 and a cylinder block 30 in a compressor, as shown in FIG. 4A.
- the gasket 33 is constituted of a metal plate 34 or a base member and a rubber layer 35 or an elastic member formed on the surface of the metal plate 34 .
- the rubber layer 35 adheres to the metal plate 34 without any adhesive material.
- a plurality of through holes 34 A is formed to extend through the metal plate 34 in thickness, and the rubber layer 35 formed on each side of the metal plate 34 interconnects through the through holes 34 A.
- FIG. 4A the structure is applied to a gasket 33 of a valve plate assembly 32 , which is interposed between a rear housing 31 and a cylinder block 30 in a compressor, as shown in FIG. 4A.
- the gasket 33 is constituted of a metal plate 34 or a base member and
- the gasket 33 forms a plurality of holes 37 so as to correspond to suction ports and discharge ports of a valve plate 36 , and also forms a plurality of through holes 38 for bolts.
- the thickness of the rubber layer 35 is exaggerated, as compared with an actual thickness. According to the structure described above, the rubber layer 35 adheres to the metal plate 34 such that the rubber layer 35 can be easily removed from the metal plate 34 .
- the base members 12 , 25 , 34 are made of metal.
- the base members may be made of material other than metal.
- the base members may be made of resin or fiberglass reinforced plastic (FRP).
Abstract
A seal device has a base member and an elastic member. The elastic member adheres to the base member so as to cover substantially the entire surface of the base member without any adhesive material. Thereby, the elastic member and the base member can be easily removed from each other.
Description
- The present invention relates to a seal device and more particularly to a lip seal for sealing a gap around a drive shaft of a compressor for use in an air conditioner and a gasket for sealing a joint between housing members Japanese Unexamined Utility Model publication No.5-30637 discloses one of seal devices. The seal device has a base member, or a housing of an oil seal, and an elastic member, or a lip seal made of rubber. The base member is made of a metal plate. The end of the elastic member is fixed to the base member with a reinforcement member and another seal member made of synthetic resin by caulking or by bending the part of base member.
- Since the elastic member is pliant and easily deforms, generally the end of the elastic member fixedly adheres to the base member by means of an adhesive material.
- An unwanted effect is that detaching the elastic member from the base member is difficult since the elastic member adheres to the base member. Also, when the elastic member is detached from the base member with a relatively large force, the part of elastic member remains on the base member. Consequently, recycling the base member is difficult. Therefore, it is desired that the elastic member is easily removed from the base member and the seal device is easily recycled.
- In accordance with the present invention, a seal device has a base member and an elastic member. The elastic member adheres to the base member so as to cover substantially the entire surface of the base member without any adhesive material.
- Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
- The features of the present invention that are believed to be novel are set forth with particularity in the appended claims. The invention together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which:
- FIG. 1 is a partially schematic view of a lip seal according to a first embodiment of the present invention;
- FIG. 2 is a partially schematic view of a lip seal according to a second embodiment of the present invention;
- FIG. 3A is a partially cross-sectional view of an annular base according to another embodiment of the present invention;
- FIG. 3B is a partially cross-sectional view taken along the line I-I in FIG. 3A;
- FIG. 4A is a partially cross-sectional view of a compressor with a gasket;
- FIG. 4B is a partially enlarged schematic cross-sectional view of the gasket; and
- FIG. 4C is an end view of the gasket.
- A first embodiment of the present invention will now be described with reference to FIG. 1. The front side and the rear side correspond to the left side and the right side in FIG. 1, respectively.
- As shown in FIG. 1, an
annular retainer 12, afirst seal member 13, asecond seal member 14 and a back-up ring 15 constitute alip seal 11. Theretainer 12 or a base member is made of a metal plate. Thefirst seal member 13 or an elastic member is made of rubber. Thesecond seal member 14 is made of synthetic resin. The back-upring 15 or a reinforcement member is made of a metal plate. - The
first seal member 13 is made of synthetic rubber such as acrylonitrile butadiene rubber, and is annular in shape. Besides, the spring hardness Hs of the synthetic rubber is preferably 75 or above based on stability of shape, and is more preferably 80 or above, and is much more preferably 85 or above. Also, thesecond seal member 14 is made of fluororesin such as polytetrafluoroethylene (PTFE), and is annular in shape. Also, the cross section of the back-upring 15 is substantially L-shaped, and the back-upring 15 is constituted of acylindrical portion 15A and an extendedportion 15B, which extends from the rear end of thecylindrical portion 15A toward the central axis of thelip seal 11. - The cross section of the
retainer 12 is substantially U-shaped. Theretainer 12 includes acylindrical portion 12A, an annular front extendedportion 12B and an annular rear extended portion 12C. Thecylindrical portion 12A includes a cylindrical surface along the direction of the central axis of theretainer 12. The front extendedportion 12B and the rear extended portion 12C respectively extend from the front end of thecylindrical portion 12A and the rear end of thecylindrical portion 12A toward the central axis of theretainer 12. - Substantially the entire surface of the
retainer 12 is formed within thefirst seal member 13 by insert mold. Strictly, in theretainer 12, the entire surface of thecylindrical portion 12A, the entire surface of the rear extended portion 12C and the front end of the front extendedportion 12B are covered with the elastic member, which constitutes thefirst seal member 13. Thefirst seal member 13 adheres to theretainer 12 without any adhesive material. - A plurality of through
holes 12D is formed to extend through theretainer 12 in thickness. The elastic member, which constitutes thefirst seal member 13, occupies the throughholes 12D, and the elastic member on each side of theretainer 12 interconnects through the throughholes 12D. - The
first seal member 13 includes anannular base 13A and anannular lip portion 13B. Thebase 13A accommodates theretainer 12. Thelip portion 13B extends from thebase 13A. Parts of outer peripheries of the back-upring 15 and thesecond seal member 14 are respectively accommodated in front and rear in a space surrounded by the part offirst seal member 13 covering the inner surface (the lower surface in FIG. 1) of thecylindrical portion 12A and the front end surface of the rear extended portion 12C and also by the front extendedportion 12B of theretainer 12. A protrusion is formed on the front surface of the rear extended portion 12C of thefirst seal member 13. Thesecond seal member 14 and the back-upring 15 are fixedly caulked such that the protrusion and the front extendedportion 12B sandwich thesecond seal member 14 and the back-upring 15. Thesecond seal member 14 and the back-upring 15 are assembled to theretainer 12 and thefirst seal member 13 without any adhesive material such that thesecond seal member 14 and the back-upring 15 can be disassembled from theretainer 12 and thefirst seal member 13. - Substantially the entire rear surface of the extended
portion 15B of the back-upring 15 contacts with thesecond seal member 14. A slidingsurface 14A of thesecond seal member 14 with respect to arotary shaft 16 provides aspiral groove 14B, which functions to return lubricant oil to a sealed region A. - The
lip seal 11 is installed to a compressor such that a protrusion formed on thebase 13A abuts against the inner surface of aseal chamber 18, which is defined in ahousing 17 of the compressor. Also, thelip seal 11 is supported by thehousing 17, and is assembled to the compressor such that the end of thelip portion 13B of thefirst seal member 13 and thesliding surface 14A of thesecond seal member 14 abut against the outer circumferential surface of therotary shaft 16, which is inserted through theseal members - Additionally, the protrusions respectively formed on the outer periphery of the
base 13A and on thefirst seal member 13 covering the front surface of the rear extended portion 12C ensure relatively high sealing performance. Therefore, no elastic member is interposed between the front end of thecylindrical portion 15A and the rear surface of the front extendedportion 12B. Nevertheless, sealing performance of thelip seal 11 is not deteriorated. - The following advantageous effects are obtained from the present embodiment.
- (1) The
first seal member 13 adheres to substantially the entire surface of theretainer 12 without any adhesive material. Thereby, thefirst seal member 13 is easily removed from theretainer 12. Therefore, thefirst seal member 13 and theretainer 12 are easily recycled. - (2) The
retainer 12 is made of metal plate. Therefore, relatively high heat-resistance of the base member is easily ensured. For example, theretainer 12 made of metal plate is inhibited from deforming under conditions of relatively high temperature, as compared with theretainer 12 made of resin. Thereby, theretainer 12 made of metal plate tends to be utilized under conditions of relatively high temperature. In addition, in view of gas permeation performance, theretainer 12 made of metal is more efficient than that made of resin. - (3) The
first seal member 13 is formed by insert mold. Thereby, thelip seal 11 is easily mass-produced. Namely, manufacturing cost is reduced. - (4) The
retainer 12 forms the plurality of throughholes 12D, which extends in thickness, and thefirst seal member 13 formed on each side of theretainer 12 interconnects through the throughholes 12D. Thereby, thefirst seal member 13 is inhibited from being removed. - (5) A space between the outer periphery of the
retainer 12 and the wall surface of theseal chamber 18 is sealed by the part ofbase 13A of thefirst seal member 13. Thereby, no another seal member such as O-ring requires to be arranged to seal the space. Therefore, the number of parts is reduced, as compared with a structure including such another seal member arranged to seal the space between the outer periphery of theretainer 12 and the wall surface of theseal chamber 18. - A second embodiment of the present invention will now be described with reference to FIG. 2. The front side and the rear side correspond to the left side and the right side in FIG. 2, respectively. The structure of the lip seal in the first embodiment is modified in the second embodiment. The structure other than the lip seal is similar to that in the first embodiment. Therefore, only the structure different from that in the first embodiment will be described. The same reference numerals denote the similar components to those in the first embodiment.
- An annular case21, a
first seal member 22, asecond seal member 23 and a back-upring 24 constitute alip seal 20. The annular case 21 is made of metal plate. Thefirst seal member 22 or an elastic member is made of rubber. Thesecond seal member 23 is made of resin. The back-upring 24 or a reinforcement member is made of metal. - The
first seal member 22 is made of synthetic rubber such as acrylonitrile butadiene rubber, and is annular in shape. Also, thesecond seal member 23 is made of fluororesin such as polytetrafluoroethylene PTFE, and is annular in shape. Also, the back-upring 24 is annular disk-shaped. - The cross section of the case21 is substantially S-shaped. The case 21 includes an outer cylindrical portion 21A or an outermost outside diameter portion, which includes a cylindrical surface along the direction of the central axis of the case 21. An annular front extended portion 21B and an annular rear
extended portion 21C respectively extend from the front end and the rear end of the outer cylindrical portion 21A. Also, in the case 21, an annular O-ring case 21D extends frontward from the radially inner end of the front extended portion 21B. - The parts of outer peripheries of the back-up
ring 24, thesecond seal member 23 and thefirst seal member 22 are accommodated in order from the front side in areentrant 21E, which is formed by the outer cylindrical portion 21A, the front and the rearextended portions 21B, 21C. The first and thesecond seal members ring 24 are fixedly caulked such that the front and the rearextended portions 21B, 21C sandwich the first and thesecond seal members ring 24. The first and thesecond seal members ring 24 are assembled to the case 21 without any adhesive material such that the first and thesecond seal members ring 24 can be disassembled from the case 21. - An
annular retainer 25 or a base member made of metal plate is covered with thefirst seal member 22 by insert mold, and is arranged in thefirst seal member 22 adjacent to the outer periphery. The part ofretainer 25 is arranged to receive force due to caulking. - A plurality of through
holes 25A is formed to extend through theretainer 25 in thickness (the front and the rear direction in FIG. 2). The elastic member constituting thefirst seal member 22 occupies the throughholes 25A. Thereby, the elastic member formed on each side of theretainer 25 interconnects through the throughholes 25A. Therefore, thefirst seal member 22 adheres to theretainer 25 without any adhesive material. - Additionally, a sliding
surface 23A of thesecond seal member 23 with respect to therotary shaft 16 forms aspiral groove 23B, which functions to return lubricant oil to the sealed region A. - An O-ring26 is fitted in an annular reentrant, which is formed by the front extended portion 21B and the O-ring case 21D. When the
lip seal 20 is installed in theseal chamber 18, the O-ring 26 seals a gap between the wall surface of theseal chamber 18 and the outer periphery of the case 21, and the end of thefirst seal member 22 and the slidingsurface 23A of thesecond seal member 23 close to the outer circumferential surface of therotary shaft 16. Thereby, a gap around therotary shaft 16 is sealed. - In addition to the advantageous effects mentioned in the paragraph (1) to (4) in the first embodiment, the following advantageous effects are obtained.
- (6) The part of
retainer 25 is arranged to receive force due to caulking. In such a state, since the elastic member of thefirst seal member 22 on each side of theretainer 25 is relatively thin, pressure applied to the elastic member of thefirst seal member 22 by caulking tends to be relatively large. Therefore, sealing performance on the elastic member of thefirst seal member 22 on each side of theretainer 25 improves. - The present invention is not limited to the embodiments described above, but may be modified into the following examples.
- In the above-mentioned embodiments, the base member or the
retainer holes first seal member holes holes 12D is recessed on each side of aretainer 40. The bottom of eachgroove 41 is wider than the opening, and the cross section of eachgroove 41 is substantially rectangular in shape, as shown in FIG. 3B. Thegrooves 41 continuously extend from the radially inner end of the frontextended portion 40A toward the radially inner end of the rearextended portion 40B on the frontextended portion 40A and the rearextended portion 40B, respectively. In such a state, even when the elastic member adheres to the surface of theretainer 40 without any adhesive material, the part of elastic member occupies thegrooves 41. Thereby, the elastic member is inhibited from being removed from theretainer 40. - In the above-mentioned embodiments, the base member or the
retainer - In the above-mentioned embodiments, a through
hole retainer - In the above-mentioned embodiments, the
spiral groove - In the above-mentioned embodiments, the elastic member or the
first seal member retainer - In the above-mentioned embodiments, the
base members retainer 25 made of metal plate. - The above-mentioned structure of the seal device may be applied to a gasket. For example, the structure is applied to a
gasket 33 of avalve plate assembly 32, which is interposed between arear housing 31 and acylinder block 30 in a compressor, as shown in FIG. 4A. As shown in FIG. 4B, thegasket 33 is constituted of ametal plate 34 or a base member and arubber layer 35 or an elastic member formed on the surface of themetal plate 34. Therubber layer 35 adheres to themetal plate 34 without any adhesive material. A plurality of throughholes 34A is formed to extend through themetal plate 34 in thickness, and therubber layer 35 formed on each side of themetal plate 34 interconnects through the throughholes 34A. As shown in FIG. 4C, thegasket 33 forms a plurality ofholes 37 so as to correspond to suction ports and discharge ports of avalve plate 36, and also forms a plurality of throughholes 38 for bolts. Besides, as shown in FIG. 4B, the thickness of therubber layer 35 is exaggerated, as compared with an actual thickness. According to the structure described above, therubber layer 35 adheres to themetal plate 34 such that therubber layer 35 can be easily removed from themetal plate 34. - In the embodiments mentioned above, the
base members - Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive and the invention is not to be limited to the details given herein but may be modified within the scope of the appended claims.
Claims (21)
1. A seal device comprising:
a base member; and
an elastic member adhering to the base member so as to cover substantially the entire surface of the base member without any adhesive material.
2. The seal device according to claim 1 , wherein the base member is made of metal.
3. The seal device according to claim 1 , wherein at least the part of base member is arranged to receive force due to caulking the elastic member.
4. The seal device according to claim 1 , wherein the base member is made of one of resin and fiberglass reinforced plastic.
5. The seal device according to claim 1 , wherein the base member is annular in shape.
6. The seal device according to claim 1 , wherein each side of the base member is recessed to form a groove, and the part of elastic member occupies the groove.
7. The seal device according to claim 6 , wherein the bottom of the groove is wider than the opening of the groove.
8. The seal device according to claim 6 , wherein the groove continuously extends from one end to the other end on each side of the base member.
9. The seal device according to claim 1 , wherein the base member forms a through hole, which extends in thickness, and the elastic member formed on each side of the base member interconnects through the through hole.
10. The seal device according to claim 1 , wherein the elastic member is formed by insert mold.
11. The seal device according to claim 1 , wherein the elastic member is made of rubber.
12. The seal device according to claim 11 , wherein the elastic member is made of synthetic rubber such as acrylonitrile butadiene rubber.
13. The seal device according to claim 1 , wherein the seal device is a lip seal.
14. The seal device according to claim 1 , wherein the seal device is a gasket.
15. A compressor comprising:
a housing;
a rotary shaft supported by the housing; and
a seal device comprising:
a base member having through hole, which is formed to extend through the base member in thickness; and
an elastic member adhering to the base member so as to cover substantially an entire surface of the base member, wherein the elastic member on each side of the base member interconnects through the through hole.
16. The compressor according to claim 15 , wherein the seal device is interposed between the housing and the rotary shaft.
17. The compressor according to claim 15 , wherein the seal device is accommodated in the housing.
18. The compressor according to claim 15 further comprising:
a cylinder block connected to the housing;
wherein the seal device is interposed between the housing and the cylinder block.
19. The compressor according to claim 15 , wherein the seal device is a lip seal.
20. The compressor according to claim 15 , wherein the seal device is a gasket.
21. A compressor comprising:
a housing:
a rotary shaft supported by the housing; and
a seal device comprising:
a base member having grooves, which is recessed on each side of the base member, the bottom of each groove being wider than the opening of the groove; and
an elastic member adhering to the base member so as to cover substantially an entire surface of the base member, wherein the part of elastic member on each side of the base member occupies the grooves.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001168607A JP2002364761A (en) | 2001-06-04 | 2001-06-04 | Sealing material |
JP2001-168607 | 2001-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020182072A1 true US20020182072A1 (en) | 2002-12-05 |
Family
ID=19010817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/158,289 Abandoned US20020182072A1 (en) | 2001-06-04 | 2002-05-30 | Seal device |
Country Status (3)
Country | Link |
---|---|
US (1) | US20020182072A1 (en) |
JP (1) | JP2002364761A (en) |
DE (1) | DE10224175A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060269407A1 (en) * | 2005-05-25 | 2006-11-30 | Ab Skf | Seal |
US20070284831A1 (en) * | 2006-06-09 | 2007-12-13 | Ab Skf | Compressor Shaft Seal |
US20100170632A1 (en) * | 2008-12-31 | 2010-07-08 | Saint-Gobain Performance Plastics Corporation | Multilayer polymeric articles and methods for making same |
CN101809344A (en) * | 2008-05-15 | 2010-08-18 | 伊格尔工业股份有限公司 | Lip type seal |
CN102818031A (en) * | 2012-09-05 | 2012-12-12 | 重庆市嘉龙密封件制造有限公司 | Mine oil-free self-lubricating oil seal |
US9297457B2 (en) | 2013-01-29 | 2016-03-29 | Eagle Industry Co., Ltd. | Sealing device |
CN110397742A (en) * | 2012-08-23 | 2019-11-01 | 伊格尔工业股份有限公司 | Sealing device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5016423B2 (en) * | 2007-09-14 | 2012-09-05 | イーグル工業株式会社 | Lip type seal |
JP4875597B2 (en) * | 2007-11-28 | 2012-02-15 | イーグル工業株式会社 | Lip type seal |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3838862A (en) * | 1968-10-31 | 1974-10-01 | Dowty Seals Ltd | Seals for use between two relatively-rotating surfaces |
US4614371A (en) * | 1983-08-03 | 1986-09-30 | Firma Carl Freudenberg | Ring |
US5055015A (en) * | 1988-05-23 | 1991-10-08 | Atsugi Motor Parts Company, Limited | Seal structure for rotary body and vane-type rotary compressor employing the same |
-
2001
- 2001-06-04 JP JP2001168607A patent/JP2002364761A/en active Pending
-
2002
- 2002-05-30 US US10/158,289 patent/US20020182072A1/en not_active Abandoned
- 2002-05-31 DE DE10224175A patent/DE10224175A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3838862A (en) * | 1968-10-31 | 1974-10-01 | Dowty Seals Ltd | Seals for use between two relatively-rotating surfaces |
US4614371A (en) * | 1983-08-03 | 1986-09-30 | Firma Carl Freudenberg | Ring |
US5055015A (en) * | 1988-05-23 | 1991-10-08 | Atsugi Motor Parts Company, Limited | Seal structure for rotary body and vane-type rotary compressor employing the same |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7670111B2 (en) * | 2005-05-25 | 2010-03-02 | Ab Skf | Seal |
US20060269407A1 (en) * | 2005-05-25 | 2006-11-30 | Ab Skf | Seal |
US8322726B2 (en) * | 2006-06-09 | 2012-12-04 | Ab Skf | Compressor shaft seal |
US20070284831A1 (en) * | 2006-06-09 | 2007-12-13 | Ab Skf | Compressor Shaft Seal |
US9163731B2 (en) | 2008-05-15 | 2015-10-20 | Eagle Industry Co., Ltd. | Lip type seal |
US20100244389A1 (en) * | 2008-05-15 | 2010-09-30 | Eagle Industry Co., Ltd. | Lip type seal |
CN101809344A (en) * | 2008-05-15 | 2010-08-18 | 伊格尔工业股份有限公司 | Lip type seal |
CN105782453A (en) * | 2008-05-15 | 2016-07-20 | 伊格尔工业股份有限公司 | Lip Type Seal |
US20140083604A1 (en) * | 2008-12-31 | 2014-03-27 | Saint-Gobain Performance Plastics Corporation | Multilayer polymeric articles and methods for making same |
US20100170632A1 (en) * | 2008-12-31 | 2010-07-08 | Saint-Gobain Performance Plastics Corporation | Multilayer polymeric articles and methods for making same |
CN110397742A (en) * | 2012-08-23 | 2019-11-01 | 伊格尔工业股份有限公司 | Sealing device |
CN102818031A (en) * | 2012-09-05 | 2012-12-12 | 重庆市嘉龙密封件制造有限公司 | Mine oil-free self-lubricating oil seal |
US9297457B2 (en) | 2013-01-29 | 2016-03-29 | Eagle Industry Co., Ltd. | Sealing device |
Also Published As
Publication number | Publication date |
---|---|
JP2002364761A (en) | 2002-12-18 |
DE10224175A1 (en) | 2003-04-30 |
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