CN109458340B - Slide valve assembly and compressor with same - Google Patents
Slide valve assembly and compressor with same Download PDFInfo
- Publication number
- CN109458340B CN109458340B CN201811467542.4A CN201811467542A CN109458340B CN 109458340 B CN109458340 B CN 109458340B CN 201811467542 A CN201811467542 A CN 201811467542A CN 109458340 B CN109458340 B CN 109458340B
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- Prior art keywords
- slide valve
- hole
- valve rod
- rolling
- valve
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- 238000005096 rolling process Methods 0.000 claims abstract description 86
- 238000000034 method Methods 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 9
- 239000003507 refrigerant Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding Valves (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a slide valve component and a compressor with the slide valve component, wherein the slide valve component comprises a valve rod, the valve rod is arranged in a through hole of a machine body in a penetrating way, the slide valve component also comprises a aligning structure, and the aligning structure comprises: the annular base is fixedly arranged in the through hole, the valve rod penetrates through the annular base, the inner side surface of the annular base, facing the valve rod, is a spherical surface, and the curvature center of the spherical surface is positioned on the central line of the through hole; the rolling body group is located between the spherical surface and the valve rod, and the rolling body group comprises a plurality of rolling bodies, the plurality of rolling bodies are arranged along the circumferential direction of the valve rod, and each rolling body is matched with the valve rod and can roll on the spherical surface. The technical scheme of the invention can effectively solve the problems that the sliding valve rod and the through hole of the machine body are not always in the coaxiality tolerance range in the prior art, so that the sliding valve rod generates deflection deformation in the moving process, and further the sliding valve is blocked.
Description
Technical Field
The invention relates to the technical field of slide valves, in particular to a slide valve assembly and a compressor with the slide valve assembly.
Background
The screw compressor is a rotary volumetric compressor, and its main structure includes a machine body, a pair of female and male rotors which are placed in parallel and are in the form of screw. The screw compressor has one volume cavity inside, and the screw compressor has the working principle of the female rotor and the male rotor meshed to reduce the enclosed volume of the volume cavity and raise the pressure of medium. In a refrigeration system, a screw compressor is used to increase the pressure of a refrigerant, and the suction side of the screw compressor is communicated with an evaporator, and the discharge side of the screw compressor is communicated with a condenser. The low-pressure refrigerant from the evaporator is continuously reduced through the volume cavity formed by the meshing of the female rotor and the male rotor of the screw compressor, so that the aim of improving the pressure of the refrigerant is fulfilled.
In order to adapt to different environmental conditions and load requirements, a slide valve assembly is arranged in a machine body of the screw compressor, and comprises a slide valve, a piston and a slide valve rod for connecting the slide valve and the piston. The output load and internal volume ratio are controlled by moving the spool valve. Specifically, the machine body is internally provided with a sliding valve cavity and a piston cavity, and the sliding valve cavity is communicated with the piston cavity through a through hole. The slide valve is arranged in the slide valve cavity, the top of the slide valve cavity is provided with two intersected cambered surfaces, and the two cambered surfaces are matched with the inner wall of the other inner cavity of the machine body to form the volume cavity. The piston is placed in the piston cavity, and the slide valve rod is arranged in the through hole in a penetrating way. The amount of high pressure refrigerant oil in the piston chamber is regulated by a solenoid valve to move the spool valve to the proper position.
In the prior art, the sliding valve rod needs to move in the through hole of the machine body, and in order to ensure the normal operation of the sliding valve assembly, the coaxiality precision requirement between the sliding valve rod and the through hole is high. However, due to errors generated by machining of the slide valve rod or errors generated by assembly of parts, the through holes of the slide valve rod and the machine body are not always in the coaxiality tolerance range, so that the slide valve rod generates deflection deformation in the moving process, and further slide valve movement blocking is caused, and the loading and unloading of the compressor are abnormal.
Disclosure of Invention
The embodiment of the invention provides a slide valve assembly and a compressor with the slide valve assembly, which are used for solving the problems that a slide valve rod and a through hole of a machine body are often not in a coaxiality tolerance range in the prior art, so that the slide valve rod generates deflection deformation in the moving process, and further the slide valve is blocked.
To achieve the above object, the present invention provides a spool valve assembly including a valve stem penetrating in a through hole of a body, the spool valve assembly further including a centering structure including: the annular base is fixedly arranged in the through hole, the valve rod penetrates through the annular base, the inner side surface of the annular base, facing the valve rod, is a spherical surface, and the curvature center of the spherical surface is positioned on the central line of the through hole; the rolling body group is located between the spherical surface and the valve rod, and the rolling body group comprises a plurality of rolling bodies, the plurality of rolling bodies are arranged along the circumferential direction of the valve rod, and each rolling body is matched with the valve rod and can roll on the spherical surface.
Further, the number of the rolling element groups is plural, and the plural rolling element groups are arranged along the axial direction of the valve rod.
Further, the number of the rolling element groups is two.
Further, the rolling bodies include balls.
Further, in the rolling element group, a plurality of rolling elements are spaced from each other.
Further, the rolling element group further includes a cage for restricting the relative positions of the plurality of rolling elements.
Further, the annular base is in interference connection with the hole wall of the through hole.
Further, the outer side surface of the annular base is attached to the wall of the through hole.
According to another aspect of the present invention, there is provided a compressor including a slide valve assembly as described above.
Further, the slide valve assembly further comprises a slide valve connected with the first end of the valve rod and a piston connected with the second end of the valve rod, and the compressor further comprises a body, wherein a slide valve cavity for accommodating the slide valve and a piston cavity for accommodating the piston are arranged in the body, and the slide valve cavity and the piston cavity are communicated through a through hole.
By applying the technical scheme of the invention, the aligning structure is arranged between the valve rod and the through hole. The aligning structure comprises an annular base and a rolling body group. The inner side surface of the annular base, which faces the valve rod, is a spherical surface, and the curvature center of the spherical surface is positioned on the central line of the through hole. The plurality of rolling elements of the rolling element group are arranged along the circumferential direction of the valve rod, and each rolling element is matched with the valve rod and can roll on the spherical surface.
When the valve rod moves in the through hole, if deviation occurs between the center line of the valve rod and the center line of the through hole, the rolling body automatically rolls along the spherical surface to adjust the position of the valve rod (for example, when the center line of the valve rod is biased downwards relative to the center line of the through hole, the rolling body below the valve rod rolls to a higher position outside the spherical surface to push the valve rod upwards). Because the curvature center of the spherical surface is positioned on the center line of the through hole, the valve rod and the through hole can be coaxial (generally, the coaxiality is positioned in an allowable tolerance range) finally through the adjustment of a plurality of rolling bodies of the rolling body group, the automatic aligning function is realized, and the valve rod and the through hole are always coaxially arranged, so that the deflection deformation of the valve rod in the moving process is avoided, and the phenomenon of sliding valve moving blocking is avoided.
Drawings
FIG. 1 is a schematic illustration of the construction of a spool valve assembly according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the spool valve assembly of FIG. 1 at A;
FIG. 3 is a schematic structural view of a rolling element set of the spool valve assembly of FIG. 1; and
Fig. 4 is a schematic view of another angle of the rolling element group of fig. 3.
Reference numerals illustrate:
10. A valve stem; 20. a centering structure; 21. an annular base; 211. a spherical surface; 22. a rolling element group; 221. a rolling element; 222. a retainer; 30. a slide valve; 40. a piston; 50. a spring; 60. an end cap; 70. a limiting ring; 101. a through hole; 102. a slide valve cavity; 103. a piston chamber.
Detailed Description
The invention will now be described in further detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
As shown in fig. 1 to 4, the slide valve assembly of the present embodiment is applied to a screw compressor. The slide valve assembly includes a valve stem 10, and the valve stem 10 is penetrated in a through hole 101 of a body of the screw compressor. The spool valve assembly also includes a centering structure 20. The centering structure 20 includes an annular base 21 and a set of rolling elements 22. Wherein the annular base 21 is fixedly disposed within the through hole 101. The valve stem 10 passes through the annular base 21. The inner surface of the annular base 21 facing the valve rod 10 is a spherical surface 211. The center of curvature of the spherical surface 211 is located on the center line of the through hole 101. The set of rolling elements 22 is located between the spherical surface 211 and the valve stem 10. The rolling element group 22 includes a plurality of rolling elements 221. The plurality of rolling bodies 221 are disposed along the circumferential direction of the valve stem 10. Each rolling element 221 is directly engaged with the valve stem 10 and is capable of rolling on the spherical surface 211.
With the spool valve assembly of the present embodiment, the aligning structure 20 is provided between the valve stem 10 and the through hole 101. The centering structure 20 includes an annular base 21 and a set of rolling elements 22. The inner side of the annular base 21 facing the valve rod 10 is a spherical surface 211, and the curvature center of the spherical surface 211 is located on the center line of the through hole 101. The plurality of rolling elements 221 of the rolling element group 22 are provided along the circumferential direction of the valve stem 10, and each rolling element 221 is directly engaged with the valve stem 10 and is capable of rolling on the spherical surface 211.
When the valve stem 10 moves in the through hole 101, if a deviation occurs between the center line of the valve stem 10 and the center line of the through hole 101, the rolling bodies 221 automatically roll along the spherical surface 211 to perform position adjustment of the valve stem 10 (for example, when the center line of the valve stem 10 is biased downward with respect to the center line of the through hole 101, the rolling bodies 221 located below the valve stem 10 roll to a position higher outside the spherical surface 211 to push the valve stem 10 upward). Because the curvature center of the spherical surface 211 is located on the center line of the through hole 101, the valve rod 10 and the through hole 101 can be coaxial (generally, the coaxiality is within the allowable tolerance range) finally through the adjustment of the plurality of rolling bodies 221 of the rolling body group 22, so that the automatic aligning function is realized, and the valve rod 10 and the through hole 101 are always coaxially arranged, so that the deflection deformation of the valve rod 10 in the moving process is avoided, the phenomenon of slide valve moving blockage is avoided, and the normal operation of the screw compressor is effectively ensured.
In this embodiment, each rolling element 221 is directly matched with the valve rod 10, no other intermediate member is needed, the structure is simpler, the aligning effect is more direct, and the number of parts is reduced as much as possible, so that the working reliability can be further ensured.
It should be noted that the slide valve assembly of the present embodiment is applied to a screw compressor, and of course, the application of the slide valve assembly is not limited to this, and in other embodiments not shown in the drawings, the slide valve assembly may be provided in other types of compressors or other devices, as long as it is a device that still needs to ensure coaxiality between the valve rod and the through hole penetrating the valve rod.
As shown in fig. 1 and 2, in the spool valve assembly of the present embodiment, the spool valve assembly further includes a spool valve 30 connected to a first end of the valve stem 10 and a piston 40 connected to a second end of the valve stem 10. The screw compressor comprises a machine body, wherein a slide valve cavity 102 and a piston cavity 103 are arranged in the machine body, and the slide valve cavity 102 and the piston cavity 103 are communicated through a through hole 101. The slide valve 30 is placed in the slide valve cavity 102, and the top of the slide valve 30 is matched with the inner wall of the other inner cavity of the machine body to form a volume cavity, and the female rotor and the male rotor are positioned in the volume cavity. That is, the female and male rotors are located above the spool valve 30. The piston 40 is placed in the piston chamber 103, and the second end of the valve rod 10 is fitted with a spring 50, and the amount of high-pressure frozen oil in the portion of the piston chamber 103 on the side of the piston 40 remote from the spool valve 30 is adjusted by the solenoid valve, so that the spool valve 30 is moved to a proper position.
When the screw compressor is loaded, the 100% load solenoid valve is opened, the rest load solenoid valves are closed, high-pressure frozen oil continuously flows into the piston cavity 103 through the oil path, and the piston 40 is gradually pushed to move towards the suction side. When the slide valve 30 contacts the dead center of the slide valve chamber 102, the piston 40 also reaches the dead center position of the piston chamber 103, at which time no compressed gas bypass occurs, at which time the screw compressor reaches full load operation.
When the screw compressor needs to be unloaded to 50% load, the 100%, 75% and 25% load solenoid valves are closed, high-pressure frozen oil in the piston cavity 103 continuously flows out and enters the suction end through the 50% load oil path, at this time, the piston 40 moves away from the slide valve 30 under the action of the spring force of the spring 50, and the piston 40 drives the valve rod 10 and the slide valve 30 to move towards the exhaust side. When the piston 40 moves to the 50% load oil hole, the oil hole is just blocked, high-pressure frozen oil cannot enter the air suction end through the oil hole continuously, and finally the pressure at the two ends of the piston 40 is balanced, and the sucked gas can bypass to the air suction end at the moment, so that the 50% load operation effect is achieved. Similarly, when the load is required to be unloaded to 25%, the 100% solenoid valve and the 50% solenoid valve are closed, and the compressor is finally stabilized at 25% load by the same principle as the load is unloaded to 50%.
When the screw compressor is operated at partial load, the slide valve 30 is moved to a position close to the piston chamber 103, and a large part of the slide valve 30 is in a cantilever state. Under the action of exhaust pressure, due to the clearance between the existing valve rod and the through hole, the sliding valve is easy to lift, and the sliding valve can be in direct contact with tooth tops of the female rotor and the male rotor to generate mechanical friction and cause serious abrasion.
As shown in fig. 1 and 2, in the spool valve assembly of the present embodiment, each rolling element 221 is in direct contact with the valve stem 10, so that radial displacement of the valve stem 10 can be restrained, radial load can be carried, and sliding of the valve stem 10 is not affected. When the screw compressor is operated at a partial load, the valve rod 10 is mostly in a cantilever state, and the slide valve 30 is not easily lifted even under the action of the exhaust pressure, so that the slide valve 30 is prevented from contacting with tooth tops of female and male rotors, and the operation reliability of the screw compressor is further ensured.
As shown in fig. 1, 2 and 4, in the spool valve assembly of the present embodiment, the number of the rolling element groups 22 is plural, and the plural rolling element groups 22 are arranged in the axial direction of the valve stem 10. In the present embodiment, the number of the rolling element groups 22 is two, and each rolling element group 22 includes one turn of the rolling element 221. The combined action of the two rolling element groups 22 on the valve rod 10 can enhance the bearing and restraining action on the valve rod, and the structure is simple. Of course, the specific number of the rolling element groups 22 is not limited thereto, and in other embodiments not shown in the drawings, the rolling element groups may be one or three or more, and may be specifically selected as needed.
As shown in fig. 1 to 4, in the spool valve assembly of the present embodiment, the rolling bodies 221 include balls, which are simple in structure, easy to manufacture, and capable of multi-directional rolling, and are more flexible in cooperation with the spherical surface 211. Of course, the specific form of the rolling bodies 221 is not limited thereto, and in other embodiments not shown in the drawings, the rolling bodies may also be cylindrical rollers whose rolling direction should be set along the axial direction of the valve stem.
As shown in fig. 3 and 4, in the spool valve assembly of the present embodiment, in each of the rolling element groups 22, the plurality of rolling elements 221 are disposed at intervals from each other, so that the mutual contact interference between the rolling elements 221 can be avoided. In the present embodiment, the rolling element group 22 further includes a cage 222. The cage 222 has a ring shape, and has a plurality of receiving holes provided at intervals in the circumferential direction, in which the plurality of rolling bodies 221 are respectively disposed. The two cages 222 of the two rolling element groups 22 are manufactured as a unitary structure. The cage 222 can restrict the relative positions of the plurality of rolling elements 221, and does not affect the rolling of each rolling element 221. Meanwhile, the cage 222 is also able to move following the plurality of rolling elements 221. Of course, the specific form of the cage 222 is not limited thereto, and in other embodiments, the cage may be an annular groove in which a plurality of rolling bodies are disposed.
As shown in fig. 1 and 2, in the spool valve assembly of the present embodiment, an end cap 60 is provided on the chamber wall of the piston chamber 103 on the side close to the through hole 101, the middle part of the end cap 60 has a relief hole for relieving the valve stem 10, and a clearance is provided between the relief hole and the valve stem 10 and the bore diameter thereof is smaller than that of the through hole 101. That is, the portion of the end cap 60 where the relief hole is formed protrudes inward from the wall of the through hole 101. The side of the through hole 101 remote from the end cap 60 is provided with a stop collar 70. The space surrounded by the limiting ring 70, the hole wall of the through hole 101 and the end cover 60 forms a ring groove. The annular base 21 is connected in the annular groove in an interference mode, and connection is more reliable. Meanwhile, the outer side surface of the annular base 21 is attached to the wall of the through hole 101, so that the annular base 21 is conveniently arranged, and the annular base 21 is conveniently machined. Specifically, since it is finally necessary to ensure that the center of curvature of the spherical surface 211 of the annular base 21 is located on the center line of the through hole 101, if the outer side surface of the annular base 21 is attached to the wall of the through hole 101 during installation, the radius of curvature of the spherical surface 211 and the thickness of the annular base 21 are designed, wherein the thicknesses of the annular base 21 are consistent, which is more beneficial to processing.
In other embodiments not shown in the drawings, the annular base and the wall of the through hole may be directly connected by interference without providing a stopper ring and an end cap on the through hole. In addition, the outer side surface of the annular base is not attached to the hole wall of the through hole, so long as the curvature center of the spherical surface of the annular base is finally ensured to be positioned on the central line of the through hole. However, in this case, if the gap between the outer side surface of the annular base and the wall of the through hole is not uniform, the thickness of the annular base is not necessarily uniform throughout, which makes it difficult to process.
As shown in fig. 1 and 2, the present application also provides a compressor, and in an embodiment of the compressor according to the present application, the compressor is a screw compressor, which includes a slide valve assembly, the slide valve assembly is the slide valve assembly, and other structures of the screw compressor are also explained in the above description, so that the description thereof will not be repeated.
It should be noted that, the compressor of the present embodiment is not limited to the screw compressor, and in other embodiments not shown in the drawings, the compressor may be another type of compressor, as long as the coaxiality between the valve rod and the through hole penetrating the valve rod is still required to be ensured.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Of course, the above is a preferred embodiment of the present invention. It should be noted that it will be apparent to those skilled in the art that several modifications and adaptations can be made without departing from the general principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A spool valve assembly comprising a valve stem (10), the valve stem (10) being disposed through a through bore (101) of a housing, the spool valve assembly further comprising a centering structure (20), the centering structure (20) comprising:
The annular base (21) is fixedly arranged in the through hole (101), the valve rod (10) penetrates through the annular base (21), the inner side surface of the annular base (21) facing the valve rod (10) is a spherical surface (211), and the curvature center of the spherical surface (211) is positioned on the central line of the through hole (101);
-a set of rolling elements (22) located between the spherical surface (211) and the valve stem (10), the set of rolling elements (22) comprising a plurality of rolling elements (221), the plurality of rolling elements (221) being arranged in a circumferential direction of the valve stem (10), each rolling element (221) being engaged with the valve stem (10) and being capable of rolling on the spherical surface (211).
2. A slide valve assembly according to claim 1, characterized in that the number of the rolling element groups (22) is plural, and that a plurality of the rolling element groups (22) are arranged in the axial direction of the valve stem (10).
3. A slide valve assembly according to claim 2, characterized in that the number of rolling element groups (22) is two.
4. A slide valve assembly according to claim 1, characterized in that the rolling bodies (221) comprise balls.
5. A slide valve assembly according to claim 1, characterized in that in the rolling element group (22), a plurality of the rolling elements (221) are spaced apart from each other.
6. A slide valve assembly according to any one of claims 1-5, characterized in that the set of rolling elements (22) further comprises a cage (222), the cage (222) being adapted to limit the relative positions of a plurality of the rolling elements (221).
7. A slide valve assembly according to claim 1, characterized in that the annular seat (21) is in interference connection with the wall of the through hole (101).
8. A slide valve assembly according to claim 1, characterized in that the outer side of the annular base (21) is in abutment with the wall of the through bore (101).
9. A compressor comprising a slide valve assembly, wherein the slide valve assembly is as claimed in any one of claims 1 to 8.
10. The compressor of claim 9, further comprising a slide valve (30) coupled to the first end of the valve stem (10) and a piston (40) coupled to the second end of the valve stem (10), the compressor further comprising the housing having a slide valve chamber (102) therein for receiving the slide valve (30) and a piston chamber (103) therein for receiving the piston (40), the slide valve chamber (102) and the piston chamber (103) communicating through the through-hole (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467542.4A CN109458340B (en) | 2018-12-03 | 2018-12-03 | Slide valve assembly and compressor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467542.4A CN109458340B (en) | 2018-12-03 | 2018-12-03 | Slide valve assembly and compressor with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109458340A CN109458340A (en) | 2019-03-12 |
| CN109458340B true CN109458340B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811467542.4A Active CN109458340B (en) | 2018-12-03 | 2018-12-03 | Slide valve assembly and compressor with same |
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| CN (1) | CN109458340B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425118B (en) * | 2019-08-14 | 2021-09-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigerating device with same |
| EP4088032A1 (en) * | 2020-01-07 | 2022-11-16 | Johnson Controls Tyco IP Holdings LLP | Volume ratio control system for a compressor |
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| DE19752291C1 (en) * | 1997-11-26 | 1999-03-25 | Uraca Pumpen | Overflow valve for hydraulic circuit |
| JP2006038153A (en) * | 2004-07-29 | 2006-02-09 | Nachi Fujikoshi Corp | Method of manufacturing solenoid valve |
| CN101975218A (en) * | 2010-10-09 | 2011-02-16 | 何宏 | Self-aligning ball bearing |
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| CN107013465A (en) * | 2017-06-16 | 2017-08-04 | 珠海格力电器股份有限公司 | Helical-lobe compressor |
| CN108119368A (en) * | 2018-01-18 | 2018-06-05 | 珠海凌达压缩机有限公司 | A kind of bent axle roller structure, compressor and air conditioner |
| CN209430411U (en) * | 2018-12-03 | 2019-09-24 | 珠海格力电器股份有限公司 | Slide valve assembly and compressor with it |
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2018
- 2018-12-03 CN CN201811467542.4A patent/CN109458340B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752291C1 (en) * | 1997-11-26 | 1999-03-25 | Uraca Pumpen | Overflow valve for hydraulic circuit |
| JP2006038153A (en) * | 2004-07-29 | 2006-02-09 | Nachi Fujikoshi Corp | Method of manufacturing solenoid valve |
| CN101975218A (en) * | 2010-10-09 | 2011-02-16 | 何宏 | Self-aligning ball bearing |
| CN104832544A (en) * | 2015-05-18 | 2015-08-12 | 江苏联动轴承有限公司 | Special self-lubricating self-aligning worm assembly bearing for automobile EPS (electronic power steering) |
| CN107013465A (en) * | 2017-06-16 | 2017-08-04 | 珠海格力电器股份有限公司 | Helical-lobe compressor |
| CN108119368A (en) * | 2018-01-18 | 2018-06-05 | 珠海凌达压缩机有限公司 | A kind of bent axle roller structure, compressor and air conditioner |
| CN209430411U (en) * | 2018-12-03 | 2019-09-24 | 珠海格力电器股份有限公司 | Slide valve assembly and compressor with it |
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| CN109458340A (en) | 2019-03-12 |
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