CN111425400B - Slide valve adjusting mechanism and screw compressor and air conditioning system adopting same - Google Patents
Slide valve adjusting mechanism and screw compressor and air conditioning system adopting same Download PDFInfo
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- CN111425400B CN111425400B CN202010136808.8A CN202010136808A CN111425400B CN 111425400 B CN111425400 B CN 111425400B CN 202010136808 A CN202010136808 A CN 202010136808A CN 111425400 B CN111425400 B CN 111425400B
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- slide valve
- electric field
- electrode plate
- piston
- screw compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
Abstract
The invention relates to a slide valve regulating mechanism and a screw compressor and an air conditioning system adopting the same.A slide valve, a connecting rod, a piston and an electric field driving part are arranged in the slide valve regulating mechanism, wherein the electric field driving part comprises an electric field generating device which comprises a fixed electrode plate and a movable electrode plate, and the two electrode plates are oppositely arranged in parallel; the slide valve is connected with one end of a connecting rod, the other end of the connecting rod is connected with one end of a piston, and the other end of the piston is fixed with a movable electrode plate of the electric field driving part; when the two polar plates are charged, repulsive coulomb force is formed between the polar plates, and under the action of coulomb force, the movable electrode plate drives the piston to move so as to drive the slide valve to move, so that the quick adjustment of the slide valve is realized, the adjustment precision is greatly increased, the high-efficiency control is easy, and the problem that the screw compressor is frequently loaded and unloaded due to the unstable slide valve is avoided.
Description
Technical Field
The invention relates to an adjusting mechanism, a compressor and an air conditioning system adopting the adjusting mechanism, in particular to a slide valve adjusting mechanism, a screw compressor and an air conditioning system adopting the slide valve adjusting mechanism.
Background
With the development of air conditioning technology, the twin-screw compressor has been widely used in the commercial air conditioning field. However, the energy regulation reliability of the fixed-frequency screw compressor is still a technical problem, and the fixed-frequency screw compressor has the problems of insufficient regulation precision, poor stability during load loading and long response time in the regulation process, which can cause the energy regulation of the compressor to be unstable, and the compressor cannot stably run under the set load, thereby affecting the reliability of the whole air conditioning unit.
The energy regulation method of the existing compressor mainly comprises the steps that oil in an oil groove flows into an oil piston cavity through an oil way, the oil piston in the piston cavity is pushed to move under the action of oil pressure, the oil piston moves to drive a slide valve to move through a slide valve rod, and the position of an exhaust port of the compressor is regulated by regulating the position of the slide valve, so that the regulation of the internal volume ratio is realized. At present, the automatic loading mode of the compressor is divided into: electrodeless loading and unloading and electrodeless loading and unloading. However, the compressor in the prior art has a large error of oil pressure regulation when the slide valve is regulated; the oil way for pushing the slide valve to move is leaked, and the oil pressure in the oil piston cavity is unstable; response time is required for oil pressure adjustment; the problems that the adjustment precision of the compressor is insufficient, the stability is poor during load loading and the response time of the adjustment process is long are caused by the fact that the cleanliness in an oil path is not high and the locking action of a loading valve body is invalid.
Disclosure of Invention
In view of the above, the present invention provides a slide valve adjusting mechanism and a screw compressor and an air conditioning system using the same, which realize loading and unloading of the screw compressor by pushing the slide valve to move by electric field force, complete stepless adjustment of the load of the screw compressor, make the adjustment finer, replace and simplify the conventional adjusting manner, have higher stability and greatly improve the response speed of loading and unloading, and particularly,
a slide valve adjusting mechanism is used for adjusting the gas transmission capacity of a screw compressor and comprises a slide valve, a connecting rod, a piston and an electric field driving part, wherein:
the electric field driving part comprises an electric field generating device and an electric field generating device, wherein the electric field generating device comprises a fixed electrode plate and a movable electrode plate, and the two electrode plates are oppositely arranged in parallel;
the slide valve is connected with one end of a connecting rod, the other end of the connecting rod is connected with one end of a piston, and the other end of the piston is fixed with a movable electrode plate of the electric field driving part;
when the two polar plates are charged, repulsive coulomb force is formed between the polar plates, and under the action of coulomb force, the movable polar plate drives the piston to move, so that the slide valve is driven to move.
Preferably, the slide valve adjusting mechanism further comprises an elastic member, the elastic member is sleeved on the connecting rod, one end of the elastic member abuts against the piston, and the other end of the elastic member abuts against a thrust member between the slide valve and the piston.
Preferably, the fixed electrode plate and the movable electrode plate are both composed of a metal electrode plate and an electrode plate isolation layer.
Preferably, the slide valve adjusting mechanism further includes an electric charge supplying part to which the fixed electrode plate and the movable electrode plate of the electric field driving part are connected, respectively.
Preferably, the charge supplying part includes a direct current power supply and a transformer.
Preferably, the coulomb force generated by the electric field driving part is in the range of 0.8-1.2 times of the elastic force generated by the elastic member, wherein the elastic force is in the range of 400N-500N.
The invention also provides a screw compressor which adopts the slide valve adjusting mechanism provided by the invention.
Preferably, a compression chamber and a slide valve adjusting chamber are formed in the screw compressor, the compression chamber and the slide valve adjusting chamber are separated by a partition plate, the electric field driving part is arranged in the slide valve adjusting chamber in the screw compressor shell, the slide valve is arranged in the compression chamber, one end of the connecting rod is connected with the slide valve, and the other end of the connecting rod penetrates through the partition plate to be connected with the piston.
The invention also provides an air conditioning system, which adopts the slide valve adjusting mechanism and/or the screw compressor provided by the invention.
The invention provides a slide valve adjusting mechanism, a screw compressor and an air conditioning system adopting the slide valve adjusting mechanism, which change the slide valve loading and unloading mode in the prior art, adopt electric field acting force among charges to replace oil pressure acting force to push the slide valve to move, realize quick adjustment, greatly increase the adjusting precision, easily realize high-efficiency control, avoid the condition of poor adjusting stability caused by oil pressure fluctuation in the slide valve adjusting process in the prior art, and avoid the problem of frequent loading and unloading of the screw compressor caused by unstable slide valve.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic view showing the structure of a slide valve adjusting mechanism (slide valve in a loaded state) in embodiments 1 to 3 of the present invention;
FIG. 2 is a schematic view showing the structure of a slide valve adjusting mechanism (slide valve in an unloaded state) in embodiments 1 to 3 of the present invention;
in the figure:
1-a slide valve; 2-a connecting rod; 3-a piston; 4-a spring; 5-an electric field driving part; 51-a movable electrode plate; 511-a first electric plate; 512-a first electrode isolation layer; 52-fixed electrode plate; 521-a second electrode; 522-a second electrode isolation layer; 6-a direct current power supply; 7-a transformer; 8-charge; 9-a separator.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.
While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art so that they can be readily implemented by those skilled in the art. As can be readily understood by those skilled in the art to which the present invention pertains, the embodiments to be described later may be modified into various forms without departing from the concept and scope of the present invention. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" include plural forms as well, unless the contrary is expressly stated. The term "comprising" as used in the specification embodies particular features, regions, constants, steps, actions, elements and/or components and does not exclude the presence or addition of other particular features, regions, constants, steps, actions, elements, components and/or groups.
All terms including technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in dictionaries are to be interpreted as meanings complied with in the relevant technical documents and the present disclosure, and cannot be interpreted as having a very formal meaning without definition.
The invention adopts the electric field acting force between charges to replace the oil pressure acting force to push the slide valve to move, realizes quick adjustment, greatly increases the adjustment precision, is easy to realize high-efficiency control, and solves the problems of insufficient adjustment precision, poor stability during load loading and long response time in the adjustment process of the prior compressor
Example 1:
as shown in fig. 1-2, the present embodiment provides a slide valve adjusting mechanism which is provided in a screw compressor and adjusts the slide valve 1 to move by an electric field acting force to realize loading or unloading of a load in the screw compressor.
The slide valve adjusting mechanism comprises a slide valve 1, a connecting rod 2, a piston 3 and an electric field driving part 5, wherein the electric field driving part 5 comprises an electric field generating device which comprises a fixed electrode plate 52 and a movable electrode plate 53, and the two electrode plates are oppositely arranged in parallel;
the slide valve 1 is connected with one end of a connecting rod 2, the other end of the connecting rod 2 is connected with one end of a piston 3, and the other end of the piston 3 is fixed with a movable electrode plate 51 of an electric field driving part 5;
when the two plates are charged, repulsive coulomb force is formed between the plates, and under the action of coulomb force, the movable electrode plate 51 drives the piston 3 to move, and further drives the slide valve 1 to move.
The electric field acting force generated by the electric field driving part 5 directly acts on the piston 3 to push the piston 3 to move, the piston 3 transmits the driving force to the slide valve 1 through the connecting rod 2, so that the slide valve 1 moves to realize loading or unloading, an oil supply pipeline and an oil discharge pipeline are omitted, the screw compressor system is simplified, and the stability is high.
Preferably, the electric field driving part 5 comprises a fixed electrode plate 52 and a movable electrode plate 51, wherein the fixed electrode plate 52 is fixed, specifically, the fixed electrode plate 52 is fixed inside the casing of the screw compressor, the movable electrode plate 51 is arranged opposite to the fixed electrode plate 52, and fixed with the piston 3, the fixed electrode plate 52 and the movable electrode plate 51 are provided with charges 8 of variable quantity and same polarity, which, according to coulomb's law, because charges of the same polarity repel each other, the charges 8 with the same polarity on the fixed electrode plate 52 and the movable electrode plate 51 generate an electric field acting force (i.e., coulomb force) between the fixed electrode plate 52 and the movable electrode plate 51, and the fixed electrode plate 52 is in a fixed state and cannot move, and the other end of the slide valve 1 connected with the connecting rod 2 has no other force to act on the slide valve, so that the acting force of the electric field can directly push the piston 3 and the connecting rod 2 and the slide valve 1 connected with the piston to move.
Preferably, the fixed electrode plate 52 and the movable electrode plate 51 are both composed of a metal electrode plate and an electrode plate isolation layer. Specifically, the movable electrode plate 51 is composed of a first electrode 511 and a first electrode isolation layer 512, and the fixed electrode plate 52 is composed of a second electrode 521 and a second electrode isolation layer 522. The first electric plate 511 and the second electric plate 521 are arranged in parallel and oppositely, are made of metal materials and have the same area, and the first electric plate isolating layer 512 and the second electric plate isolating layer 522 are respectively arranged on the back surfaces of the opposite surfaces of the first electric plate 511 and the second electric plate 521 to form insulating layers for the first electric plate 511 and the second electric plate 521 and prevent electric leakage.
Preferably, the slide valve adjusting mechanism further includes an electric charge supplying part, the fixed electrode plate 52 and the movable electrode plate 51 of the electric field driving part 5 are respectively connected to the electric charge supplying part, and the electric charge supplying part charges the fixed electrode plate 52 and the movable electrode plate 51 to respectively carry the same number of electric charges 8 with the same polarity, so as to generate an electric field acting force between the fixed electrode plate 52 and the movable electrode plate 51.
Preferably, the charge supplying part comprises a dc power supply 6 and a transformer 7, in this embodiment, the positive electrode of the dc power supply 6 is connected to the transformer 7 through a conducting wire, and the transformer 7 is connected to the electric plates through another conducting wire, so that the first electric plate 511 and the second electric plate 521 carry the same number of positive charges 8; the regulating transformer 7 can change the voltage of the DC power supply 6, so that the first electric board 511 and the second electric board521, and further, the electric field force between the first plate 511 and the second plate 521, which is calculated as: f ═ Q1 × Q1)/(2 × epsilon0S), where F is the electric field force, Q1 is the amount of charge carried on the first or second electrode 511, 521, epsilon0Is the dielectric constant of the medium between the first electrical plate 511 and the second electrical plate 521; s is the area of the first electric plate 511 or the second electric plate 521. The movement of the slide valve 1 is realized by utilizing the interaction force among the charges 8, and the stepless adjustment of the load of the screw compressor is completed, so that the adjustment is more precise. The interaction force between the electric plates is changed by changing the magnitude of the electric charge on the first electric plate 511 and the second electric plate 521, and the response speed of the circuit is far greater than that of the oil circuit, so that the response speed of loading and unloading of the screw compressor is greatly improved.
Preferably, the slide valve adjusting mechanism further comprises an elastic member, the elastic member is sleeved on the connecting rod 2, one end of the elastic member abuts against the piston 3, the other end of the elastic member abuts against a thrust member between the slide valve 1 and the piston 3, the elastic member generates elastic force, and the elastic force is matched with the acting force of an electric field to move the piston 3, wherein the thrust member is a partition plate 9 formed by a shell of the screw compressor. Preferably, the elastic member is a spring 4.
Specifically, the voltage of the dc power supply 6 is increased by the transformer 7 to increase the amount of charge Q1 on the first and second electric plates 511 and 521, and the electric field acting force (i.e., coulomb force) at that time is calculated as F according to the formula for calculating the electric field acting force1When F is1When the force is larger than the elastic force W of the spring 4, the direction of the resultant force received by the piston 3 at the moment is equal to F1In the same direction, i.e. the piston 3 will be along F1Is moved (to the left in fig. 1 and 2), thereby pushing the connecting rod 2 and the slide valve 1 together along F1To thereby effect loading of the screw compressor.
The voltage of the dc power supply 6 is reduced by the transformer 7, and the amount of charge Q1 on the first and second electric plates 511 and 521 is reduced, and the electric field acting force (i.e., coulomb force) at this time is calculated as F according to the formula for calculating the electric field acting force2. When F is present2Less than the spring force W of the spring 4, the resultant force to which the piston 3 is subjected at that timeThe direction is the same as the direction W, i.e. the piston 3 will move in the direction W (to the right in fig. 1 and 2), which in turn pushes the connecting rod 2 and the slide valve 1 together to move in the direction W, whereby the loading of the screw compressor is achieved.
Preferably, the electric field driving part 5 generates the electric field acting force in a range of 0.8-1.2 times of the elastic force generated by the elastic member, and the range prevents the electric field acting force from being too much larger than the elastic force, thereby avoiding the piston 3 from moving too fast, wherein the elastic force is in a range of 400N-500N. In this embodiment, the range of the electric field acting force is preferably 0.9-1.1 times of the elastic force, so that the piston 3 moves more smoothly.
According to the slide valve 1 adjusting mechanism provided by the embodiment, the slide valve 1 is pushed to move by the electric field force to realize loading and unloading of the screw compressor, stepless adjustment of the load of the screw compressor is completed, the adjustment is finer, the traditional adjusting mode is replaced and simplified, an oil supply pipeline and an oil discharge pipeline are omitted, the compressor system is simplified, and the stability is higher; the interaction force between the electrode plates is changed by using the charge quantity on the electrode plates, the response speed of the circuit is far higher than that of an oil circuit, and the response speed of loading and unloading is greatly improved.
Example 2:
the present embodiment provides a screw compressor, which adopts the slide valve 1 adjusting mechanism provided in embodiment 1.
Preferably, a compression chamber and a slide valve adjusting chamber are formed in the screw compressor, the compression chamber and the slide valve adjusting chamber are separated by a partition plate 9, the electric field driving part 5 is arranged in the slide valve adjusting chamber in the screw compressor shell, the slide valve 1 is arranged in the compression chamber, one end of the connecting rod 2 is connected with the slide valve 1, and the other end of the connecting rod passes through the partition plate 9 and is connected with the piston 3.
The embodiment provides a screw compressor, the mode that the slide valve loaded and uninstalled among the prior art has been changed, adopt electric field effort among the electric charge to replace oil pressure effort and promote slide valve 1 to remove, realize quick adjustment, adjust precision greatly increased, easily realize high-efficient control, the condition that the slide valve adjustment in-process leads to adjusting the poor stability because of the oil pressure fluctuation among the prior art has been avoided, the problem of frequent loading of screw compressor, uninstallation because of the slide valve is unstable has been avoided, also avoid screw compressor to produce and overflow unusual and/or high-pressure unusual and/or the noise is unusual.
Example 3:
the present embodiment provides an air conditioning system that employs the slide valve 1 adjustment mechanism provided in embodiment 1 and/or the screw compressor provided in embodiment 2. The movement of the slide valve 1 is realized by utilizing the interaction force among the charges, the stepless adjustment of the load of the compressor is completed, the adjustment is more precise, the condition of lubricating oil waste in the slide valve adjusting process in the conventional screw compressor is avoided, the energy is saved, the stability is higher, and the response speed of loading and unloading is greatly improved.
In summary, the present invention provides a slide valve adjusting mechanism and a screw compressor and an air conditioning system using the same, wherein the slide valve adjusting mechanism is provided with a slide valve 1, a connecting rod 2, a piston 3 and an electric field driving part 5, wherein the electric field driving part 5 comprises an electric field generating device, the electric field generating device comprises a fixed electrode plate 52 and a movable electrode plate 51, and the two electrode plates are arranged in parallel and opposite to each other; the slide valve 1 is connected with one end of a connecting rod 2, the other end of the connecting rod 2 is connected with one end of a piston 3, and the other end of the piston 3 is fixed with a movable electrode plate 51 of an electric field driving part 5; when the two polar plates are charged, repulsive coulomb force is formed between the polar plates, under the action of coulomb force, the movable electrode plate 51 drives the piston 3 to move, and further drives the slide valve 1 to move, so that the quick adjustment of the slide valve 1 is realized, the adjustment precision is greatly increased, the high-efficiency control is easy to realize, and the problem that the screw compressor is frequently loaded and unloaded due to the instability of the slide valve 1 is solved.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. A slide valve adjusting mechanism is used for adjusting the gas transmission capacity of a screw compressor and is characterized by comprising a slide valve, a connecting rod, a piston and an electric field driving part, wherein:
the electric field driving part comprises an electric field generating device, the electric field generating device comprises a fixed electrode plate and a movable electrode plate, and the two electrode plates are oppositely arranged in parallel;
the slide valve is connected with one end of the connecting rod, the other end of the connecting rod is connected with one end of the piston, and the other end of the piston is fixed with the movable electrode plate of the electric field driving part;
when the two polar plates are charged, repulsive coulomb force is formed between the polar plates, and under the action of coulomb force, the movable polar plate drives the piston to move, so that the slide valve is driven to move.
2. The slide valve adjustment mechanism of claim 1 further comprising an elastic member sleeved on the connecting rod, one end of the elastic member abutting against the piston and the other end abutting against a thrust member between the slide valve and the piston.
3. An adjustment mechanism for a slide valve according to claim 1 or claim 2 wherein said fixed electrode plate and said movable electrode plate are each comprised of a metallic electrode plate and an electrode plate spacer layer.
4. The sliding valve adjusting mechanism according to claim 3, further comprising an electric charge supplying portion to which the fixed electrode plate and the movable electrode plate of the electric field driving portion are connected, respectively.
5. The slide valve adjustment mechanism of claim 4 wherein the charge supply comprises a DC power supply and a transformer.
6. A slide valve adjustment mechanism as claimed in claim 2, wherein the electric field drive portion generates a coulomb force in the range of 0.8-1.2 times the spring force generated by the resilient member, wherein the spring force is in the range of 400N-500N.
7. A screw compressor characterized in that it employs a slide valve adjusting mechanism according to any one of claims 1 to 6.
8. The screw compressor according to claim 7, wherein a compression chamber and a slide valve regulation chamber are formed in the screw compressor, the compression chamber and the slide valve regulation chamber are partitioned by a partition plate, the electric field driving part is provided in the slide valve regulation chamber in the screw compressor housing, the slide valve is provided in the compression chamber, one end of the connecting rod is connected to the slide valve, and the other end thereof passes through the partition plate and is connected to the piston.
9. An air conditioning system, characterized in that it employs a slide valve adjusting mechanism according to any one of claims 1 to 6 and/or a screw compressor according to any one of claims 7 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010136808.8A CN111425400B (en) | 2020-03-02 | 2020-03-02 | Slide valve adjusting mechanism and screw compressor and air conditioning system adopting same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010136808.8A CN111425400B (en) | 2020-03-02 | 2020-03-02 | Slide valve adjusting mechanism and screw compressor and air conditioning system adopting same |
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| CN111425400A CN111425400A (en) | 2020-07-17 |
| CN111425400B true CN111425400B (en) | 2021-06-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1182191A (en) * | 1997-09-05 | 1999-03-26 | Hitoshi Karino | Combustion control method of internal combustion engine by electric field |
| JP4551448B2 (en) * | 2006-01-24 | 2010-09-29 | 日本電信電話株式会社 | Acceleration generating device and pseudo force sense generating device |
| ES2441575T3 (en) * | 2006-10-16 | 2014-02-05 | Carrier Corporation | Compressor slide valve bracket |
| CN107191530B (en) * | 2017-05-26 | 2019-02-01 | 中国民航大学 | A kind of twin coil piston magneto-rheological liquid shimmy-damper |
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