WO2001034997A1

WO2001034997A1 - Localizing method for solid powder of magnetic induction and damping apparatus thereof

Info

Publication number: WO2001034997A1
Application number: PCT/CN2000/000419
Authority: WO
Inventors: Ling Qiu
Original assignee: Ling Qiu
Priority date: 1999-11-11
Filing date: 2000-11-09
Publication date: 2001-05-17
Also published as: CN1150569C; CN1251465A; AU1266501A

Abstract

Localizing method for solid powder of magnetic induction and damping apparatus thereof, in which the magnetic induced solid powders in about times the size of submicrometre mixed into a magneto-rheological fluid (MRF) are localized within an internal zone included filters and MRF damper, i.e. a carrier medium in the MRF enters a filter of the zone to be mixed with the solid powders stored therein so that becoming MRF, and then it will be separated after passing another filter of the zone. The disadvantage such as depositing, wearing, aging occurred with usual MRF, and the wear and contamination from solid powder to respective elements could be avoided, and the magneto-rheological properties in MRF could be improved as well by using this localizing method and damping apparatus thereof.

Description

(57) Abstract The present invention relates to a method for localizing a magnetic field response sensitive material-solid phase powder and a damping device, which limits the magnetic field in the magnetorheological fluid larger than sub-micron level to respond to sensitive material-solid phase powder. In the internal space area formed by the filter and the magnetorheological fluid damper, when the plant body of the solid phase powder of the magnetorheological fluid flows into the above-mentioned internal space area, it and the solid stored in the internal space area The phase powder forms a magnetorheological fluid. After passing through the filter, the solid phase powder stored in the internal space region is separated from the carrier of the solid powder, and the carrier flows out of the local area. The method and its device completely avoid the problems of phase separation, abrasion, aging of the magnetorheological fluid, and solid phase powder pollution and abrasion of the applied device. The cost is reduced, the reliability is improved, the aging resistance is enhanced, and the magnetorheological effect of the magnetorheological fluid can be significantly improved.

Localization of sensitive magnetic field-responsive solid materials

Method and damping device thereof TECHNICAL FIELD

The invention relates to a method and a damping device for localizing a magnetic field responding to a sensitive material larger than sub-micron order and a solid phase powder.

Background technique

Different from the magnetic fluid stabilization system, the magnetorheological fluid is a functional mixture material non-stable system in which a magnetic field response alert material-solid phase powder is suspended in a fluid carrier. Under the action of an external magnetic field, the rheological properties of the fluid itself change significantly. In general, the particle size of the magnetic field response sensitive material-solid phase powder in the magnetic fluid stabilization system is submicron, and the size of the magnetic field response sensitive material-solid phase powder in the magnetorheological fluid ^ stable system is from micrometers to several micrometers. mm, i.e., the large ¹⁰³ to ¹⁰⁶ times, thus causing the shield on the amount of characteristic variations. Apparently, under the applied magnetic field, the apparent transient system magnetorheological fluid viscosity to 1. 0 ¹ To ¹⁰⁸ times vary, but substantially non-magnetorheological fluid system stable rheological characteristics vary significantly occur . For example, a magnetorheological fluid non-stable system can flow freely under the action of an external magnetic field, and can become a plastic body or even a semi-solid under the action of an external magnetic field. The significant change in the rheological properties of a magnetorheological fluid unstable system under the action of an external magnetic field is called the magnetorheological effect. Therefore, the rheological properties of the magnetorheological fluid non-stable system (hereinafter referred to as magnetorheological fluid) under the action of an applied magnetic field can be used to provide damping. For example, the magnetorheological fluid and its devices are mainly used in various mechanical equipment. And industries such as semi-active energy dissipation, semi-active vibration reduction, semi-active buffering, semi-active vibration isolation, variable stiffness control, torque control, pressure and flow pulsation control and pipeline vibration suppression in electro-hydraulic servo control systems. Provide mechatronics high-tech products with low price, excellent performance and higher performance-price ratio than full active systems. For improving our country and the world The level in the above industries is of great significance.

Compared with electrorheological fluids, magnetorheological fluids have their significant advantages:

1) Under the condition of cheap processing technology, it is not necessary to apply a strong electric field; 2) The magneto-rheological effect is at least an order of magnitude stronger than the electro-rheological effect; 3) The requirements for the use of environmental conditions are relatively loose; 4) The existing magnetic technology is mature and soft Magnetic powder has been produced in large quantities. But similar to ER fluids, MR fluids also have a fatal weakness: phase separation. Phase separation is the essence of non-colloidal systems, especially non-stable systems. The main reason is that the degree of dispersion in the dispersion medium in this system is greater than the submicron pole. Although the devices using magnetorheological fluids are mainly focused on semi-active energy dissipation, semi-active vibration reduction, semi-active buffering, semi-active vibration isolation, variable stiffness control, torque control, and electro-hydraulic servo control for various mechanical equipment and large buildings Pressure flow pulsation control and pipeline vibration suppression in the system.

Magnetorheological fluids and damping devices such as the world patent WO94 / 00704 "MAGNET0RHE0L0GICAL FLUID DEVICES" (magnetorheological fluid device) and the world patent WO98 / 00653 "CONTROLLABLE VIBRATION APPARATUS" (controllable vibration device), they use the magnetic current Variable fluids all have the following shortcomings: (1) Phase separation. As the storage time increases, solid-phase powders larger than sub-micron level in the magnetorheological fluid will phase separate from the fluid carrier. On the basis, their magnetorheological effects are very different, but they often bring a lot of inconvenience to most applications, otherwise they must be fully stirred again to make them homogeneous; (2) the abrasion of the application system due to suspension in the magnetorheological fluid The solid phase powders in the metal are often metals and their alloys, which circulate at high speed in the application system along with their carrier, causing the system and application components to wear away and affecting the service life; (3) The aging resistance of the magnetorheological fluid is poor. Improve the physical stability of the magnetorheological fluid. The size of the solid phase powder in the magnetorheological fluid is in the order of micrometers. As the layer thickness increases, the magnetorheological effect weakens, reflecting its poor aging resistance; A 3—

The cost is high, in order to improve the physical and chemical stability of the magnetorheological fluid, high-quality powder is expensive. When used in large circulation systems, a large amount of magnetorheological fluid and a lot of high-quality powder are often required, so the cost is high; ( E) It is well known that within a certain volume percentage, the magnetorheological effect increases significantly with the increase in volume percentage, but under the premise of fluidity requirements, the volume percentage of the solid phase powder added cannot be too high, although the magnetorheological The effect is stronger by an order of magnitude than the ER effect, but still somewhat weak for some applications; (6) Under the premise of fluidity requirements, a surfactant must generally be added, but because the added surfactant is a polar material Such as acidic surfactants and alkaline surfactants, which can cause corrosion to application devices and related seals; (7) the use of magnetorheological fluids in large-scale application devices and systems often requires a large amount of magnetorheological fluids, From the anti-dust pollution level of the circulation system, the magnetorheological fluid is "dirty oil," Obviously, it is an artificial dust pollution; (8) Although soft magnetic materials, especially soft magnetic powders, have a small remanence, for some soft magnetic powders, such as carbon steel powder, the remanence is still indispensable. Flow in the system is bound to cause magnetic pollution.

The purpose of the present invention is to address the shortcomings of the prior art mentioned above, and provide a method for localizing a magnetic field responding to a sensitive material larger than sub-micron order to a solid-phase powder, that is, to limit the solid-phase powder larger than the sub-micron order. In a region of the internal space formed by the filter and the magnetorheological fluid damping device, a magnetic field larger than a sub-micron level in the magnetorheological fluid responds to the carrier of the sensitive material—a solid phase powder—into and out of the aforementioned internal space region, A local magnetorheological fluid is formed in the internal space region as described above, and a magnetorheological fluid damping device formed according to this principle is provided.

Summary of invention

The purpose of the present invention is as follows: A method for localizing a magnetic field response sensitive material larger than sub-micron order to a solid phase powder is to limit the magnetic field response sensitive material larger than sub-micron order to a solid-phase powder Filter B and One four one

In the internal space area formed by the magnetorheological fluid damper C (unidirectional); or the magnetic field response phase-sensitive material larger than the sub-micron level, a solid phase powder is limited by the filters A, B and the magnetorheological fluid damper In the internal space area formed by C (two-way); when the carrier of the local magnetorheological fluid solid phase powder flows into the above internal space area, it forms a local area with the solid phase powder stored in the internal space area. After the magnetorheological fluid passes through the filter B, the solid phase powder stored in the internal space region is separated from the carrier of the solid powder, and the carrier flows out of the internal space region (unidirectional); when flowing in the reverse direction, it passes through the filter A Then, the solid phase powder stored in the internal space area is separated from the carrier of the solid powder, and the carrier flows out of the internal space area (bidirectional).

It consists of magnetorheological fluid damper C and filter B, or magnetorheological fluid damper C and filters A and B. The damper C is composed of a magnetic field and an air gap D in the magnetic field. When the solid phase powder and its carrier pass through the air gap D together, as long as the flow direction is not parallel to the direction of the applied magnetic field, the magnetic field in the local magnetorheological fluid responds to the sensitive material under the action of the magnetic field. A solid phase powder is near the magnetic pole. Regional reunion, so that the magnetorheological effect occurs, and the outlet of the solid powder carrier in the local magnetorheological fluid is provided with a filter B (unidirectional); or the inlet and outlet of the solid powder carrier in the local magnetorheological fluid is filtered. B and A (two-way); the magnetic field is a permanent magnetic field or an electromagnetic field, preferably an electromagnetic field formed by a charged solenoid; the air gap D in the magnetic field can be set on the periphery of the charged solenoid (external) It can also be arranged in the tube of the charged solenoid in a direction that is not parallel to the axis of the charged solenoid (internal type), and preferably it is arranged in a direction perpendicular to the axis of the charged solenoid (internal type). It can be arranged on the periphery of the charged solenoid and the tube of the charged solenoid in a direction that is not parallel to the axis of the charged solenoid. Among them, it is arranged in the tube of the charged solenoid that is not parallel to the axis of the charged solenoid. It is best to arrange it in a direction perpendicular to the axis of the charged solenoid (internal type)

The air gap D in the magnetic field is either the same multi-stage phase in series; or the same The phases are connected in parallel; or different types (not homogeneous) of multiple stages are connected in series, or different types (not homogeneous) of multiple stages are connected in parallel.

The filter is a porous material filter element that can withstand a certain pressure difference and has a certain strength, and its filtering accuracy is 0.00001-0.1, especially 0.00001-0.05, and the best is 0.001-0.04.

The filter element of the filter has a corresponding porous material casing which can withstand a certain pressure difference and has a certain strength.

The local magnetorheological fluid is composed of a magnetic field response sensitive material greater than sub-micron order, a solid phase powder, and a magnetic field response sensitive material greater than sub-micron order, a solid phase powder carrier; the carrier is a belt Liquids, gases or gas-liquid mixtures with additives, preferably liquids and gases with additives, the above liquids include various non-corrosive liquids, and the above gases include various non-corrosive gases and compressed gases; When the carrier is a liquid with additives, the additives are various surfactants, and the added amount of the surfactant is 0% to 10%, and preferably 0% to 5% of the volume of the carrier; The phase powder is a soft magnetic powder, generally various carbon steel powders and alloy steel powders, especially pure iron and iron-based alloys, pure cobalt and cobalt-based alloys, pure nickel and nickel-based alloys, and mixtures of the above-mentioned solid phase powders.

The soft magnetic powder is coated with a surface coating, and the coating is an improved magnetic permeability coating, an anti-rust coating, and an insulating coating for the treatment of particles of electro-rheological fluid.

The particle size of the powder is 0.001 mm to 100 mm, the general size is 0.001 mm to 5 mm, the optimal size for liquid carriers is 0.015 mm to 1 mm, the optimal size for gas carriers is 0.001 mm to 0.1 mm, and for gas-liquid The optimal mixed carrier is 0.01 mm to 0.5 mm.

The morphology of the powder is flaky, needle-like, ellipsoidal and spherical, and mixtures thereof.

The filling amount is 1 ° / »to 100% of the entire internal space volume, typically 10% to 90%, and most preferably 30% to 80%. Its filling amount includes the loose loading of powder. A 6—

Porosity formed between particles.

The advantages of the present invention are: (1) completely avoiding the problem of phase separation of the magnetorheological fluid in the system; (b) greatly suppresses the abrasion of the magnetorheological fluid to the application components and the system; (c) because it can be used Large size magnetic field response sensitive material-solid phase powder, the aging resistance of the magnetorheological fluid is greatly enhanced; (4) There is no need to prepare a sub-meter magnetic field response sensitive material-solid phase in order to improve the physical stability of the magnetorheological fluid. Powder; (5) Magnetic field response sensitive material-less solid phase powder, low cost; (6) On the basis of not increasing the cost of general magnetorheological fluid, you can use excellent shield, high performance magnetic field response sensitive material A solid phase powder; (7) Because the magnetic field responds to the sensitive material, the volume fraction of a solid phase powder in the local area can be increased, thereby significantly improving the magnetorheological effect of the magnetorheological fluid; (8) At the same time, the magnetic field is also reduced Respond to the sensitive material-solid phase powder to pollute the application system.

Detailed description of the invention

The present invention is described in detail below with reference to the drawings.

Figure 1 Schematic diagram of a method for localizing magnetic field responses of sub-micron-level sensitive materials—solid phase powders.

Figure 2 Schematic diagram of the structure of a local magnetorheological fluid damping device (internal type). Fig. 3 Schematic diagram of local magnetorheological fluid damping device (external type). Figure 4 Structural schematic diagram of a local magnetorheological fluid damping device (internal type) Example.

Fig. 5 Structural schematic diagram of a local magnetorheological fluid damping device (external type) Example.

Referring to FIG. 1, a method for localizing a magnetic field response sensitive material larger than the submicron level to a solid phase powder is to limit the magnetic field response sensitive material larger than the submicron level to a solid phase powder by the filter B and the local area. In the inner space area (unidirectional) formed by the magnetorheological fluid damper C, or the magnetic field response sensitive material larger than the sub-micron level, a solid phase powder is limited to the filter A, B A 7—

And local magnetorheological fluid damper C in the area of internal space (two-way). When the carrier of the local magnetorheological fluid solid phase powder flows into the internal space, it forms a local magnetorheological fluid with the solid phase powder stored in the internal space, and passes through the filter B in the internal space. The stored solid phase powder is separated from the carrier of the solid powder, and the carrier flows out of the internal space (unidirectional). Similarly, when the solid phase powder passes through the filter A in the reverse flow, the solid phase powder stored in the internal space is separated from the solid phase powder. The carrier of the solid powder is separated, and the carrier flows out of the internal space (bidirectional).

The purpose of the invention is to confine solid phase powders larger than submicron order to the internal space area formed by the filter and local magnetorheological fluid damper, so that the magnetic field larger than submicron order responds to the sensitive material-solid phase. The carrier of the powder flows into and out of the internal space region described above, and forms a local magnetorheological fluid in the internal space region as described above. The local magnetorheological fluid is a sensitive material that responds to magnetic fields larger than the sub-micron level. A solid phase powder, a magnetic field response sensitive material larger than the sub-micron level, a solid phase powder carrier,

The carrier of the magnetic field response sensitive material in a local magnetorheological fluid as described in the invention, a solid-phase powder, is generally a liquid, a gas or a gas-liquid mixture with additives, and most preferably a liquid and a gas with additives. The liquids mentioned above include various non-corrosive liquids, such as magnetic fluid stabilization systems, various mineral oils (petrol, kerosene and diesel), various silicone oils, various silicon copolymers, chlorinated hydrocarbons, hydraulic oils, Water and a mixture of the above liquids. The above-mentioned gases include various non-corrosive gases and compressed gases such as air.

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the invention-the carrier of the solid phase powder is generally a liquid with additives, and the additives are various surfactants, such as oleic acid, polyethanol, Diethylene glycol. Generally speaking, the surfactant is added in an amount of 0% to 10% of the volume of the carrier, and preferably 0% to 5%.

Magnetic field response sensitive material in local magnetorheological fluid as described in the object of the invention A solid phase powder is a soft magnetic powder, which is generally a variety of carbon steel powder and alloy steel powder such as

TiCrCuMo, 17Cr-lMo, 18Cr-2Mo, Fe-Si-Al, ε-Fe ₃ N, iron, cobalt, nickel and alloy powders, especially pure iron and iron-based alloys such as FeCoNi, FeCoLi, pure cobalt and cobalt-based Alloys, pure nickel and nickel-based alloys, and mixtures of the above solid phase powders.

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the invention-a solid phase powder is a soft magnetic powder coated with a surface coating, and is generally a carbon steel powder and an alloy steel powder such as TiCrCuMo with a surface coating, 17Cr-lMo, 18Cr- 2Mo, Fe-Si-Al, ε-Fe ₃ N, iron, cobalt, nickel and their alloy powders, especially pure iron and iron-based alloys such as FeCoNi, FeCoLi, pure cobalt and cobalt-based alloys, Pure nickel and nickel-based alloys and mixtures of the above solid phase powders.

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the invention-a solid phase powder is a soft magnetic powder coated with a surface coating, and the coating is generally an improved magnetically conductive coating such as a superconductive magnetic material, Rust materials and insulation coatings for ER fluid particle treatment.

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the invention-the particle size of the powder of the solid phase powder is 0.001 mm to 100 mm, and the general size is 0.001 mm to 5 mm. The optimal size for the liquid carrier 0. Q15 mm to 1 mm, the optimal size for gas carriers is

0.001 mm to 0.1 mm, optimal for gas-liquid mixed carriers is 0.01 mm to 0.5 mm.

The magnetic field-responsive sensitive materials in the local magnetorheological fluid described in the object of the present invention are solid, powder, flakes, needles, ellipsoids, and spheres, and mixtures thereof, and ellipsoids and spheres.

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the invention. The filling amount of the solid phase powder in the internal space as described above is 1% to 100% of the entire internal space volume, typically 10%. To 90%, the best is 30% to 80%. One nine one

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the invention, the solid-phase powder is filled in the internal space as described above, and the volume of the internal space is 1% to 100%, and generally 10% to 90%. %, Preferably 30% to 80%, and the filling amount includes the porosity formed between the powder particles when the powder is loosely packed.

The carrier of the magnetic field response sensitive material in a local magnetorheological fluid as described in the invention, a solid-phase powder, is generally a liquid, a gas and a gas-liquid mixture with additives, and most preferably a liquid and a gas with additives. The liquids mentioned above include various non-corrosive liquids, such as a magnetic fluid stabilization system, which can be used to increase the magnetic permeability of the local strong magnetorheological fluid to improve the magnetorheological effect.

The magnetic field response sensitive material in the local magnetorheological fluid described in the object of the present invention-the carrier of the solid phase powder is generally a liquid, a gas and a gas-liquid mixture with additives, and most preferably a liquid and a gas with additives. The liquids mentioned above include various non-corrosive liquids, such as a magnetic fluid stabilization system, which is generally composed of a sub-micron magnetic field response sensitive material, a solid phase powder, a dispersion medium, and an additive. Sub-micron level magnetic field response sensitive material-solid phase powder is soft magnetic powder, generally various carbon steel powder and alloy steel powder such as TiCrCuMo, 17Cr-lMo, 18Cr-2Mo, Fe-Si-Al, ε-Fe ₃ N , Iron, cobalt, nickel and alloy powders, especially pure iron and iron-based alloys such as FeCoNi, FeCoLi, pure cobalt and cobalt-based alloys, pure nickel and nickel-based alloys, and mixtures of the above solid phase powders. Submicron-level magnetic field-responsive materials—a solid-phase powder has the morphology of flakes, needles, ellipsoids, and spheres, and mixtures thereof, and ellipsoids and spheres. Sub- ^: Meter-level magnetic field response sensitive material-the amount of solid phase powder is 0% to 40% of the dispersion medium, and the best is 5 ° / »to 30 ° /. . Liquid, gas and gas-liquid mixtures, preferably liquids and gases with additives. The liquids mentioned above include various non-corrosive liquids, various mineral oils (gasoline, kerosene and diesel), various silicone oils, various silicon copolymers, chlorinated -10- Hydrocarbon, hydraulic oil, water and mixture of above liquids. The above-mentioned gases include various non-corrosive gases and compressed gases, such as air. The additives are various surfactants, such as oleic acid, polyethanol, and diethylene glycol. Generally speaking, the addition amount of the surfactant is 0% to 10% of the volume of the carrier, and the best is 0% to 5 ° /. .

Referring to Figures 2 and 3, 1-internal type solenoid; 2-internal type magnetic pole one; 3-internal type magnetic pole two; 4-internal type magnetizer. 5-Magnetic pole 1 for external use; 6-Magnetic pole 2 for external use; 7-Magnetic core for external use; 8-Magnetic isolation ring for external use; 9-Magnetically conductive ring for external use; 10-Spiral for external use tube. The damping device is composed of a magnetic field and an air gap D in the magnetic field. When the magnetic field responds to the smart material, a solid phase powder and its carrier pass through the air gap D, as long as the flow direction is not parallel to the direction of the applied magnetic field, the magnetic field acts. In the local magnetorheological fluid, the magnetic field responds to the sensitive material. A solid phase powder aggregates in the vicinity of the magnetic pole, so that the magnetorheological effect occurs. The outlet of the solid powder carrier in the local magnetorheological fluid is provided with a filter A (if Only one in each direction).

The local magneto-rheological fluid damping device described in the object of the invention is composed of a local magneto-rheological fluid damping device and a filter. The damping device is composed of a magnetic field and an air gap D in the magnetic field. When the magnetic field responds to a sensitive material When a solid phase powder and its carrier pass through the air gap D together, as long as the flow direction is not parallel to the direction of the applied magnetic induction intensity, the magnetic field in the local magnetorheological fluid responds to the sensitive material under the action of a magnetic field. In general, the magnetic field is a permanent magnetic field or an electromagnetic field, preferably an electromagnetic field formed by a charged solenoid; the air gap D in the magnetic field can generally be set on the periphery (external type) of the charged solenoid, or it can be set on the periphery of the charged solenoid. The inside of the tube of the charged solenoid is arranged in a direction that is not parallel to the axis of the charged solenoid (internal type), and preferably it is arranged in a direction perpendicular to the axis of the charged solenoid (internal type).

The local magneto-rheological fluid damping device described in the object of the invention is composed of a local magneto-rheological fluid damper and a filter, and the damper is composed of a magnetic field and -11- The air gap D in the magnetic field is formed. When the magnetic field responds to the sensitive material, a solid phase powder and its carrier pass through the air gap D, as long as the flow direction is not parallel to the direction of the applied magnetic induction intensity, under the action of the magnetic field, the local The magnetic field in the domain magnetorheological fluid responds to agglomeration of a sensitive material and a solid phase powder. Generally speaking, the magnetic field is a permanent magnetic field and an electromagnetic field, and the best is an electromagnetic field formed by a charged solenoid. The air gap D in the magnetic field can generally be set. On the periphery of the charged solenoid (outside type), it can also be arranged in the tube of the charged solenoid in a direction that is not parallel to the axis of the charged solenoid (inside type), or it can be set on the periphery of the charged solenoid at the same time And the inside of the tube of the charged solenoid are arranged in a direction that is not parallel to the axis of the charged solenoid (hybrid type), and it is best to arrange in the tube of the charged solenoid in a direction that is not parallel to the axis of the charged solenoid. Arranged perpendicular to the axis of the charged solenoid (internal)

The air gap D in the magnetic field described in the local magneto-rheological fluid damping device described in the object of the invention may be a series of homogeneous multi-phases; a series of homogeneous multi-phases may be connected in parallel.

The air gap D in the magnetic field described in the local magnetorheological fluid damper described in the object of the invention may be of different types (non-homogeneous) in series, and may be of different types (non-homogeneous) in series. Of parallel.

Referring to FIG. 4, the structure of the local magneto-rheological fluid damping device is a local magneto-rheological fluid piston assembly, which is composed of a 30-end cap (1), a 31- 0 shaped ring, a 32-filter element (1), 33 -Magnet guide (1), 34-0 ring, 35-0 ring, 36-0 ring, 37-magnetically isolated compression ring (1), 38-magnetically isolated pressure ring (1), 39-magnetically isolated pressure ring ( 2), 40-magnetic sleeve, 41-0 ring, 42-magnet (3), 43-0 ring, 44-0 ring, 45- element (2), 46-0 ring, 47 -Piston rod, 48-wire and sleeve, 49-end cap (2), 50-fastening screw, 51-magnetic isolation housing, 52-solenoid and tube holder and 53-0 ring.

The 30-end cover (1) has uniformly distributed oil inlet and outlet holes and corresponding passages. The 30-end cover (1), 31- 0 ring, 32-element (1), and 33-magnet -12-

(1), the 34-0-shaped 圏 and the 51-magnetic-isolating housing constitute a filter cavity. The 42-magnet (3) also has uniformly distributed oil holes and corresponding channels, and is connected to the 43-0 ring, the 44-0 ring, the 45-element (2), the 46-0 ring, and the 49-end cap.

(2) and the 51-magnetic-isolated housing form another filter cavity. The above two cavities communicate with the corresponding channels through the oil L evenly distributed on the 33-magnet (1), 38-magnet (2), and 42-magnet (3).

The inner ends of the 33-magnet (1) and 42-magnet (3) form a magnetic pole and a magnetic field air gap. The magnetic field air gap passes through the 37-magnetically isolated pressure ring (1) and the 39-magnetically isolated pressure ring (2) ), 38-magnet (2)-divided into two. With the application of an external magnetic field, two serially connected local magnetorheological fluid dampers are formed.

At the same time, the solenoid chamber composed of 33-magnet (1) and 42-magnet (3) is equipped with a 52-solenoid and a tube holder, and its leads pass through the lead holes in 42-magnet (3) The 50-fastening screw inner hole and 47-piston rod inner hole lead out of the device.

Among them, the relationship between the components is that the 49-end cover (2) is tightened and locked to the 51-magnetic isolation housing by 50-fastening screws (the 49-end cover (2) and 51_ The shell is cast into one body to reduce processing costs) to form component one. Put a 35-0 ring and a 40-magnetically-shielded sleeve on the 33-magnet (1), and then put a 52-solenoid and a tube holder on the 40-magnetically-shielded sleeve. Pressure ring (1), 38-magnet (2), 39-magnet-isolated pressure ring (2) are placed in a 40-magnet-isolated sleeve, and then the 42-magnet (3) is passed through the 36-0 ring and 41 -The O-ring is fitted with the 33-magnet (1) and its components, thus forming component two. Then place component two into component one through the 43-0 ring, the 44-0 ring, the 45-element (2), and the 46-0 ring. Then insert the 34-0-shaped 圏, the 33-magnet (1), the 32-element (1), the 31-0 ring, and the 30-end cap (1) in that order.

The filter described in the object of the invention is composed of a porous material filter element that can withstand a certain pressure difference and a certain strength, and a corresponding housing, such as various metal powders. -13- Sintered and formed pipes and plates, and mixtures thereof, ceramic sintered and formed pipes and plates.

The filter described in the object of the invention is composed of a porous material filter element and a corresponding housing that can withstand a certain pressure difference and a certain strength, such as sintered formed pipes and plates of various metal powders and mixtures thereof, and ceramic sintered formed pipes and Plate. Its filtering accuracy is from 0.0001 mm to 0.1 mm, especially from 0.000001 mm to 0.05 mm, and most preferably from 0.001 mm to 0.04 mm.

The filter described in the object of the invention is composed of a porous material filter element and a corresponding housing that can withstand a certain pressure difference and a certain strength, such as sintered formed pipes and plates of various metal powders and mixtures thereof, such as copper powder and iron. Powders, stainless steel powders, aluminum and its alloy powders, sintered pipes and plates made of the above-mentioned various powders and mixtures.

Referring to FIG. 5, the structure of the local magneto-rheological fluid damping device is a local magneto-rheological fluid piston assembly, which is composed of a 70-end cap (1), a 71- 0 shape, a 72-filter element (1), 73 -Magnetic isolation housing, 74-magnet (1), 75-0 ring, 76-0 ring, 77-magnet, ⁷ 8-0 combination ring, 79-solenoid and tube holder, 80- Magnet guide (2), 81- 0 ring, 82- 0 ring, 83- 0 ring, 84- 0 ring, 85- element (2), 86- fastening screw, 87- end cap (2) , 88-0 ring, 89-0 ring, 90-piston rod and 91-wire and sleeve.

70-end cap (1) has uniformly distributed oil inlet and outlet holes and corresponding channels, 70-end cap (1), 71- 0-shaped 圏, 72-filter element (1), 73-magnetic isolation housing and 75- The 0-ring forms a filter cavity. The 87-end cover (2) also has evenly distributed oil inlet and outlet oil holes and corresponding passages. The 87-end cover (2), 83-0 ring, 85-filter element (2), 88-0 ring and 73-spacer The magnetic housing forms another filter cavity. The above two cavities are connected by two-phase magnetic field air gaps connected in series. The two-phase magnetic field air gap is composed of a magnetically permeable 80-magnet (2) and another component. -14- Success. The assembly consists of 74-magnet (1), 76-0 ring, 77-spacer magnet, 79-solenoid and tube holder, 81-magnet (3), and 82-0 ring through 86-tightening screws The inner bore of the cover (2) and the inner bore of the 90-piston rod lead out of the device.

Among them, the relationship between the components is similar to the local magnetorheological fluid damping device structure example 1 (internal formula).

Claims

-15-Claim

1. A method for localizing a magnetic field response sensitive material greater than a submicron level to a solid phase powder, characterized in that the method is to limit the magnetic field response sensitive material greater than a submicron level to a solid phase powder by filtering In the inner space area formed by the filter B and the magnetorheological fluid damper C (unidirectional); or the magnetic field response phase-sensitive material larger than the sub-micron level, a solid phase powder is limited by the filters A, B and the magnetorheological In the internal space region formed by the fluid damper C (two-way); when the carrier of the local magnetorheological fluid solid phase powder flows into the above-mentioned internal space region, it and the solid phase powder stored in the internal space region A local magnetorheological fluid is formed, and the solid phase powder stored in the internal space region is separated from the carrier of the solid powder after passing through the filter B, and the carrier flows out of the internal space region (unidirectional); After the filter A, the solid phase powder stored in the internal space area is separated from the carrier of the solid phase powder, and the carrier flows out of the internal space area (bidirectional).

2. The local magnetorheological fluid damping device for realizing the method according to claim 1, characterized in that it comprises a magnetorheological fluid damper C and a filter B or a magnetorheological fluid damper C and a filter A, B. The damper C is composed of a magnetic field and an air gap D in the magnetic field. When the magnetic field responds to the sensitive material, a solid powder and its carrier pass through the air gap D, as long as the flow direction is not parallel to the direction of the applied magnetic field Under the action of the magnetic field, the magnetic field in the local magnetorheological fluid responds to the sensitive material. A solid phase powder aggregates in the vicinity of the magnetic pole, so that the magnetorheological effect occurs. The outlet of the solid powder carrier in the local magnetorheological fluid is filtered. Filter B (unidirectional); or the inlet and outlet of the solid powder carrier in the local magnetorheological fluid are provided with filters B and A (two-way); the magnetic field is a permanent magnetic field, an electromagnetic field, and preferably a charged spiral The electromagnetic field formed by the tube; the air gap D in the magnetic field can be set on the periphery of the charged solenoid (outside type), or it can be arranged inside the tube of the charged solenoid along a direction that is not parallel to the axis of the charged solenoid (inside Style), most Charging a direction perpendicular to the axis of the solenoid -16- Arrangement (internal type), can also be arranged on the periphery of the charged solenoid and the tube of the charged solenoid in a direction that is not parallel to the axis of the charged solenoid, where it is set on the inner edge of the tube of the charged solenoid When the arrangement is not parallel to the axis of the charged solenoid, it is best to arrange it in a direction perpendicular to the axis of the charged solenoid (internal type).

3. The damping device according to claim 2, characterized in that the air gap D in the magnetic field is either a series of homogeneous multi-phases connected in series; or a series of homogeneous multi-phases connected in parallel; or different types (not homogeneous) between multiple stages In series, or in parallel between different types (not homogeneous) of multiple stages.

4. The damping device according to claim 1, characterized in that the filter is a porous material filter element that can withstand a certain pressure difference and has a certain strength, and the filtration accuracy is 0. 00001 — 0. 1, especially 0 00001 to 0.05, the best is 0.001 to 0.04.

5. The damping device according to claim 4, characterized in that the filter element of the filter has a corresponding porous material casing which can withstand a certain pressure difference and has a certain strength.

6. The method for localizing solid phase powder according to claim 1, characterized in that the local magnetorheological fluid is composed of a solid phase powder with a magnetic field response greater than sub-micron order, a solid phase powder, and The omega-level magnetic field response alert material is a solid phase powder carrier; the carrier is a liquid, a gas, or a gas-liquid mixture with additives, and most preferably a liquid and a gas with additives. The above liquids include Various non-corrosive liquids, the above-mentioned gases include various non-corrosive gases and compressed gases; when the carrier is a liquid with additives, the additives are various surfactants, and the amount of surfactants added 0% to 10% of the carrier volume, preferably 0% to 5%; the solid phase powder is soft magnetic powder, generally various carbon steel powders and alloy steel powders, especially pure iron and iron-based Alloys, pure cobalt and cobalt-based alloys, pure nickel and nickel-based alloys, and mixtures of the above solid phase powders.

7. The method for localizing solid phase powder according to claim 6, wherein -17- is characterized in that the soft magnetic powder is coated with a surface coating, and the coating is an improved magnetic conductive coating, an anti-rust coating, and an insulating coating for the treatment of ER particles.