US 1686505 A
Description (OCR text may contain errors)
Oct. 2, 1928.
G. I. STASTNY ROTARY COMPRESSOR Filed Feb. 5, 1927 mfg 3 Sheets-Sheet 2 IN VE N TOR 4 .LSmlly A TTORNE? INVENTOR alrzy ATTORNEY s sneetQ-sheet .s
|. sT`AsTNY Oct. 2, 1928.
ROTARY COMPRESSOR Filed Feb. 5. 1927 BY @ist Patented oct. 2, 192s.
GOTTLIEB I'. sTAsTNY, `OF NEW YORK, N. Y.
Application filed February 5, 1927. Serial No. 166,064.
The main object ot this invention is to provide a rotary coru} nessor having a nunr ber of novel characteristics among which an automatic means is provided divertingthe air in the compressor into' the atmosphere when the pressure in `the receivertank has arrived at certain predetermined level, thereby inaking'the machine absolutely sate in operation. 'f
Another objeft of the inventionis to provide a connai-essor .unit which is operated automatically in conjunction With a storage tank and has for oncrof its essentials the provisionfoi" a valve `which gradually opens l5 or closes as the contents of the storage tank arrives ata predetermined but-fnot neces-V sarily full pressure. The valve is o'li novel ih-sisg'nl situated midway the lenujth of the circular path which the rotor describes in ZU the compression chamber and opens or closes ports7 gradually and `partly orrvholly,'being actuated by a plunger on which the pressure oil: the contents oif the taulf; is ln'ojected.
'.fhe valve permits a portion ot the air drawn 25 into the compression chamber `to be eX- sted into the atmosphere, that port-ion ot the air passed into the atmosphere Vnot being necessary to retain the pressure in the tank up to a. suitable Working level. i
3|.; VThe above and other objects will becoine apparent in the description below in which cliaracters yoi' reference refer vto like-named parts inthe drawing. i
Referring briefly lto the drawingllig'- :3.1 ure 1 is a vertical sectional sideelevational vievv of the compressor showing the valves and rotor in detail.
Figure 2 is longitudinal sectional elevational view of the compressor unit7 the 4.-, section being taken lengthwise Valong` the shafts oi the device.
Figure 3 is Va top plan view ot `the coinf. nfessor with the pop valve and pop` valve housing reinovcd rto show the structure of ci the compressor' in greater detail. M
Referring in detail to the drawing, the numeral 10 :indicates a substantially cylindrical casing Which is formed integral and houses the` compressor rotor. This casing .5clias a pair of flanges which extend diametrically outward in` opposite directions and.
are indicated byv the numerals 11 and 12. Within the casing a precise annular chain ber 13 is formed which is bounded by e. pe- 55 ripheral Wall 14. A sleeve 15 is formed on one side of the casing and the axis of this Je is ol'lset upwardly and vertically and Y angle to the` axis o" the chamber 13. is sreve has an opening 18 therein cominunicatingl With the chamber 13 and has a pair of external raceways 16- and 17 niounted ein spaced apart from each other. spindle .21 has a pair of racevvays 19 and mounted thereon and is rotatably mounted in the sleeve 15. To eliminate i'riction as much possible the raceways 16 andi? are separated from the raceways 19 and 90 and in the space bet-Ween the pairs ,f rollers 22 are positioned and i in roller bearings for smooth running of spindle. The outer' end of the sleeve 15 is open and is sealed by a Vcover 23 which secured in place by screws 24; which latter tlV into the Wall of the sleeve and detar` y secure the plate 1n place so that it in easily removed. The end, of the dle which projects into a recess 25 posibetween the chamber 13 in the Lcasthe opening 18 in the sleeve has a .torined on that end, said llange rotatable in the recess and carries a .ely large drinn 27Which forms the rotor ci the compressor.` The drum is `inounted deteehably on the flange and is secured to the latter by bolts 28 which have vtheirsv heads counterbored into the flange. jle tlf-.e axis or' the spindlel 21 is offset from 'th of the compartment or chamber 13 in the casing 10 and the druin 27 being positiene-d inthe cliaiuaiier 13 the druinvwill consequently be rotatable in the chamber 13 in an eccentric position. The drum is of hollow constindtion7 having an annular space 29.
Oney face of the easing is openV and is closed and sealed by a flanged cap 30 which isse-v secured in place by bolts 31 which thread into the Jface of thecasing surrounding the opening in the face. Said cap is provided with an opening in which the threaded end 32 of a` shaft 33is securedby nuts 34;. The shaft 33 has a stop Harige 35 provided thereon which seats on the surface of the cap. Said flange projects inwardly into the chamber 13 formed in the casing 10 and afiially positioned therein. This Vshaft is rigidly mounted in place and does not rotate. A collar 36 is rigidly mounted on the shatt 33 and serves as a bearing upon which a pair of blades 37 and 38 are loosely iounted and are consequently in a position to swing around the axis `of the shaft 33. The blades are L-shaped and are provided fil with tongues which have `a thickness of half the depth oli the chamber 13 so that the tongues of both blades when p ut side by side will extend thru the entire depth ot the chamber 13 as is illustrated in the Figure 2. The tongues 39 of these blades are semicircular in cross section so that that portion on one side of the center willv be counterbalanced bythe weight of the blade on the opposite side, as is indicated in Figure 1. The bladesradiate :from the center to the peripheral wall of the chamber substantially diametrically opposed directions and at their free Vextremities are provided with channels 40 which extend the entire length of vthe blades.' it the these channels 40 intersecting and similar channels are formed on the sides ot the blades. The longitudinal channels 40fharbor cushion blocks 41 which areA slidably mounted therein and the channels formed on the sides oi' the blades are adapted to' receive shorter blocls`42 which vare shorter than the first-mentioned blocks.
passageways are formed which extend thru the width of the drum and have substantially semi-circular guides 46 riding therein. These guides are arranged in pairs with the blades`37 and 38 movable between them the blades'being free to slide between them.
AV curvedA and semi-circular passageway has its mouth open to the atmosphere eXterior oit'fthe casing and communicates at its opposite end with the chamber `13 in the compressor casing the entrance being indicated by the numeral 48. At the point of entrance into the chamber oil.ir the entrance ofthe passageway V-shaped ridges 49 are formed which forni substantially triangular channels 50 thru which the incoming air rushes in iets;
The wall separating the passageway fromthe channel 47 is flat at its upper portion and has an annular recess formed therein in which recess a dzslr 51 is seated. Said dish is securely attached'to an inverted bell which is letv into the chamber above and communicatin with the passageway 47 at a position intermediate its length. The wall 53 bounding the passageway 47 at the top 'thereof has a pair ot semi-circular oppositely dispose-d channels 54 'formed therein thru which the compressed air escapes romthe compression chamber 18. The disk 51 has similar and communication with the first-named channels 54. @n its upper tace the disk has two spaced apart opstanding ridges between which the channels 55 in the di:v 1 emerge into a co1iipartmentl 5G in the bell 52. The ridges on the disk '.t'orm a seat for a flange 57 which is provided with a vertically positioned hub 58 which is slidably mounted on a guide 59 whose head 61 is embedded in a recess formed axially in the disk 51. At the intersection ot the flange 57 and the hub 5S an angular wall is provided in which ports GO are formed which serve as addition` al outlets Ltor the compressedl air when the disk 55 la raised position above and lifted from the ridges formed on the disl; 51. The
Vupper end of the guide bolt 59 is threaded nut '53 which` holds a stop warner (S4 in pla on the guide holt seated on a sleeve 6G. rlhe washer retains a spring in position wound around the guide bolt, said spring being adapted to yieldably urge ctllCl GilgtlgGS the disk 57 downwardly into seating contact on the ridges tormed on member 51. The ii. d bella?? pe ,Iridedrrith a flange 67 which is supported on the casing 10 and is secured in place by bolts 68. The bell has a curved mouth 59 extending tlieretron'i above the` flange which has a pipe line 70 coupled thereto which latter leads to the cont pressed air tank (not shown on the drawing) which may be situated at any desirable position.
Beside the bell a "shaped nature 71 is mounted on thc casing. rl`liis fixture has a hollow stemv 72 in which a plunger 73 is slidable. The latter named plunger has a downwardly extending shank 74 secured thereto and at the lower end of the shanlr a valve head 7 5 having an angular periphery is formed. The periphery of this valve nor#` nially seats Aon the lower corner of the stem and is urged into this closed position by a spring 7G which is coiled around the stud 77 and is located beneath the valve head in a chamber 78 which latter communicates with the curved channels and 55 formed above the casing. jin ai iular opening 79 iliorming an outlet port is :termed in the stein of the ahap d fixture and forms a lane ot communication between the curved chan.- nels 54 and 55 and the atmosphere thru whichthe air may escapewhen the valve head is lowered from its seat on the lower end et the stem. ylhe upper horizontal arm 80 has a bore extending thru its entire length and is threadetL at one end, the latter end receiving a hollow bored bolt 81 whose bore has one end oi a spring 82 inserted therein. A piston 84 is slidable in a restricted porH tion ot the bore 83 in the horizontal arm oi member71.r rlliis piston has one end pro! vided with a tlange 235 which forms a stop for the expansion spring S2, the latter enaligned channels 55 which form aline of `the bore ot the piston wr 4ioi'nied radially in the piston.
Y remote from the compre `align with similar por vgagging and seating on said flange 'for normally urging said piston toward the end ot member 8O to which the pipe 86 is attached. Intermediate the length ot the piston an annular groove 87 is termed on said piston. A bore is formed in the piston and extends from a point midway of its length to the end of the piston opposite to the flange 85. The bore in the piston is shown by dotted lines in Figure l and it communicates with the groove S7 thru the plurality of ports 83 A passage 89 connects the bore S23 with the upper end of the chamber provided in the vertical part of 'member 7l so that anv aii" that enters pass thru the passage `8S) and enter into tliecliainber providing the groove 87V in the piston aligned with the passage 89. The ypipe 86 extends to the reservoir of the tank in which the supply is kept and may be posit' ied at any point said tanlt not beingr shown in the drawne. This pipe 8S leads a stream of air into the compressor control mechanism and acts on the valve head when it is desi ed to pass the 'co1n pressed air into the atmosphere A volume air intake control mechanism is provided on the compi-essor and measures and controls the ainount oi: air draivn'into the chamber 13 of the compressor iiieinbei' 10. The wall of the casing); l0 ojt the conipresser is deformed to provide an annular well 91 in which a cage 92 is secured by bolts 93. This cage is closed at outer end by a iace 94 in which an axial opening is forined. The cage entends horizontally into the well andv rotatably secures `an annular.
closure disk 95 in place in the bottoni of the -well in cont-act with the face ot thev Wall 96 provided. in the. bottoni of the vf'ell. 'lhs wall at the bottom oit the well provided with a pair of elongated ports 97 which pass entirely thru the well closure dis 95 Vwhen the latter is rotated to one position. The 95 has an axial. stud or shaft 99 entendi 'from which passes thru the openinpj prov led in the well in the portion 94.
vthe compressor but connectedthereto by pipe line 70, said storage tank not being shown on the drawing. The spindle 2l is rotated by The scid has a crank` YarmlOO secured thereto which is provided some source of power, not shown on the draw As the spindle is connected to the drinn 2i', the latter :is also rotated.v The anis of the spin@ le is oitset vertically and at an anglo to a shaft 33 which is rigid and noii-i'otatable and serves as a supportfor a pair of blades 37 and 38 which are positioned in slots in the druin ad thru this ,intcriocliing are caused to rotate within the annelai"rcliaiiiber 'i3 whose center is on the axis of the shaft 33. The drum rotates raised axis and is of smaller dimensioni; 'fr the annular chanil i3 thus 'toi-ming a Ci'ecent shaped space which is divided in the lowerinost blade Y is around on its travel the air in et the space in iront oi he curved ci ven into the i.. Jone.;
and raises the 'tlanfre 57 troni its captu thil-z air n the bell 52. V"rows from the latt into` the storage thru the pipe line 70.
-lWlien the pressure in the storage tank has reached a predetermined limit it backs l pipe 88 and acts upon a piston Y the away troni the pipe e tension ot the spi-hip; S5 thereby The channel and the ports St? ii said piston with the ope-i,A ng S9 i'zoinuiunicates with a sealed which a anger 73 is slidable. rigid with the plunger 73 is e `ifoin its seat and opens the passage-- atmosphere thru the port 79 io; the air cani vliich circutroni the chamber i3 troni the storage .Y This cut-oil' means be ins to operate itoinat'hally immediately upon the storage 'f at a predetermined pre .Another pipo line t ci. i
connected to pipe 103, particularly to the u] and wien the piston i l the ster until Y er partly or wholly al s 97 the floor e" a portion oit the dr reaped chamber is p' flic a.. p and wnen those po are al ned the compressor is not operating' at maximum load.
. L It.
bc noted that certain changes in torni and construction may be made without leparting from the sairit and. scope o the invention.
l. In a compressor, a casing` having a cylindrical chamber therein, an annular` druin rotatable in. said chamber eccentrica ilyt said drum havingI opposing (ilianietial cham nels therein.l counter balanced blades slidable in said channels and rotatable With the drum, a bell above said casing, curved chanlill) lil) llli) lll) nels connecting said bell and chamber, a check valve in said bell opening or closing communication to said curved channels; a valve normally closing said curved channels, and means for lay-passing the streaa'i from the curved channels into the atmosphere. Y
2. In a compressor, a casing having cylindrical chamber therein, an annular drum mounted in said chamber eceentrically, said drum having channels extending diainetrically, a shaft projecting axially into said chamber and into said drum, a pair of opposing blades rotatably mounted on said shaft slidable in said drum channels and rotatable with the drum, a passageway in said casing above said chamber and com# munieating with the latter thru curved channels, a check valve normally closing one end of the curved channels, a valve in said passageway normally closing an openi into the atmosphere, and means for openiig said valve when the air compressed rises above a predetermined pressure.
3. In a compressor, a casing having a cylindrical chamber, an annular hollow drum rotatable in said chamber eccentrically, said drum contacting with the wall of said chamber beside the upper dead center, said drinn having substantially opposing dianetral channels therein, eounterbalaneing blades Lahn slidable in said Vchannels and rotatably guided by said drum, vsaid blades having channels therein formed on the edges of said blades which contact with the surface bounding said chamber, bloclrs in said channels of said blades, an inverted bell above said casing, curved channels connecting said bell and chamber, a vertically movable check valve' in said bell normally covering said curved channels, and valve operated means `for by-passing" the air stream from the curved channels into theV atmosphere.
il. In a compressor, a casing having a cylindrical chamber, an annular hollow drum rotatable in said chamber eccentrically, said drum contacting with the wall of said chamber beside the upper dead center, said drum having substantially opposing diametral channels therein,eounterbalanci'ng blades slidable in said channels `and rotatably guided by said drum, said blades having channels therein formed on the edges of voutwardly to Contact` with the side surf ces said blades which Contact with the surface bounding said chamber, blocks in said channels of said blades, said blocks mounted ln said channels formed at the contacting edges thereof having tapering ends, said blades having additional channels formed at the sides, said channels being mutually parallel, blocks in ,said parallel channels, resilient means urging said blocks in said parallel channels into contact with the side surfaces bounding said Chamber, an inverted bell above said casing, curved channels eonnect` ing said bell and chamber, a vertically'mov`N able check valve in said bell normally coverings curved channels, and valve operated means for by-passing vthe air stream from.l
said channels formed at the contacting edges thereof having tapering ends, said blades having additional channels formed at the sides, said channels being mutually parallel, blocks in said parallel channels, coiled springs mounted in said blades beneath said parallel channels, said springs resilientlv urging said blocks in said parallel chann of the chamber, the blocks in said parallel. channels contacting withtlie blocks inthe end channels being inclined so as perfectly form a corner by said intersecting blocks, an inverted bell above said easing, curved channels connecting said bell and chamber, a vertically movable cheek valve said bell normally covering said curved channels, and valve Aoperated means for by-passing the air atmosphere. Y
In testimony whereof I aflix my signature.
eoTrLinB i. sTi-rsTNY.
stream from the curved channels into the .i