WO2020113904A1

WO2020113904A1 - Rotary compressor, gas compression system, refrigeration system and heat pump system

Info

Publication number: WO2020113904A1
Application number: PCT/CN2019/086170
Authority: WO
Inventors: 李盖敏; 李华明; 于明湖
Original assignee: 广东美芝精密制造有限公司
Priority date: 2018-12-06
Filing date: 2019-05-09
Publication date: 2020-06-11
Also published as: CN111287966A; CN111287966B

Abstract

A rotary compressor, comprising: a cylinder (1) provided with a sliding vane groove (12); a sliding vane (3) installed in the sliding vane groove (12); a cam mechanism (2), a cam part of which is rotatably provided in the cylinder (1); and a sliding shoe (4) pressed against an outer circular surface of the cam part, wherein the sliding vane (3) is provided with an arc-shaped opening groove (5), the sliding shoe (4) comprises an arc-shaped hinge joint, the hinge joint is hinged with the opening groove (5), the sliding shoe (4) is connected to the hinge joint by means of a neck part, and the width of the neck part is smaller than the width of the hinge joint; or the sliding shoe (4) is provided with the arc-shaped opening groove (5), the sliding vane (3) comprises the arc-shaped hinge joint, the hinge joint is hinged with the opening groove (5), the sliding vane (3) is connected to the hinge joint by means of the neck part, and the width of the neck part is smaller than the width of the hinge joint. And a gas compression system, a refrigeration system and a heat pump system comprising the rotary compressor. Such a rotary compressor reduces the friction between the sliding vane and a friction pair of the cam part, and improves system reliability.

Description

Rotary compressor, gas compression system, refrigeration system and heat pump system

Cross-reference of related applications

This application requires the priority of the Chinese patent application number "201811490132.1" submitted by Guangdong Meizhi Precision Manufacturing Co., Ltd. on December 6, 2018, with the invention titled "rotary compressor, gas compression system, refrigeration system and heat pump system" , The entire content of which is incorporated by reference in this application.

Technical field

The present application relates to the technical field of compressor manufacturing, and in particular to a rotary compressor, a gas compression system having the rotary compressor, a refrigeration system having the rotary compressor, and a heat pump system having the rotary compressor.

Background technique

In the compressor mechanism, the friction loss between the sliding plate and the outer circular surface of the piston is large. In order to reduce this friction loss, in the related art, a needle roller is installed between the sliding plate and the outer circumferential surface of the piston. The purpose of this structure is to change the sliding friction between the piston and the sliding plate into rolling friction. Get effectively reduced. However, the reliability of the needle roller structure is extremely high. Because the contact stress between the needle roller and the piston increases sharply, the wear resistance of the needle roller material is challenged, and the needle roller structure is prone to needle roller rolling jamming failure Risk, once the needle roller fails to roll, the needle roller will wear rapidly, until the compressor is stuck and fails, there is room for improvement.

Summary of the invention

This application aims to solve at least one of the technical problems in the prior art. Therefore, an object of the present application is to propose a rotary compressor with a reasonable structure, which can effectively reduce the friction loss between the sliding plate and the piston and extend the service life of the compressor.

The rotary compressor according to the embodiment of the present application includes: an air cylinder provided with a sliding plate slot; a sliding plate mounted on the sliding plate groove; a cam mechanism, the cam portion of the cam mechanism may be Rotatably provided in the cylinder; a sliding shoe, the sliding shoe is pressed against the outer circumferential surface of the cam portion; wherein the sliding piece is provided with an arc-shaped opening groove, and the sliding shoe includes an arc-shaped hinge Head, the hinge joint is hinged with the opening groove, the sliding shoe is connected to the hinge joint through a neck, and the width of the neck is smaller than the width of the hinge joint; or the sliding shoe is provided with an arc The shape of the opening slot, the slider includes an arc-shaped hinge joint, the hinge joint is hinged with the opening slot, the slider is connected to the hinge joint through the neck, and the width of the neck is less than Describe the width of the hinge joint.

According to the rotary compressor of the embodiment of the present application, the stress of the contact between the sliding plate and the outer surface of the cam portion is greatly improved, the lubrication state between the friction pair of the sliding plate and the cam portion is improved, and the sliding plate and the cam portion are greatly reduced The friction power consumption between the friction pairs also greatly improves its reliability, has a simple structure, low cost, and good use effect.

This application also proposes a gas compression system.

The gas compression system according to an embodiment of the present application has the rotary compressor described in any one of the above embodiments.

This application also proposes a refrigeration system.

The refrigeration system according to an embodiment of the present application has the rotary compressor described in any of the above embodiments.

This application also proposes a heat pump system.

The heat pump system according to the embodiment of the present application has the rotary compressor described in any one of the above embodiments.

The gas compression system, the refrigeration system, the heat pump system and the rotary compressor have the same advantages over the prior art, and will not be repeated here.

Additional aspects and advantages of the present application will be partially given in the following description, and some will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

1 is a schematic structural diagram of a rotary compressor according to an embodiment of the present application;

2 to 5 are schematic structural diagrams of a sliding shoe according to an embodiment of the present application;

6 to 7 are schematic structural diagrams of a sliding shoe according to an embodiment of the present application;

8 to 11 are schematic structural diagrams of cooperation between a sliding shoe and a sliding plate according to an embodiment of the present application;

12-18 are schematic structural diagrams of a sliding shoe and its oil groove according to an embodiment of the present application.

Reference mark:

Rotary compressor 100,

Air cylinder 1, compression chamber 11, slider groove 12, cam mechanism 2, slider 3, slider neck 31, slider head 32, slider 4, slider head 41, slider end 42, slider Neck 44, pressure surface 43, opening groove 5, oil groove 7.

detailed description

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be construed as limiting the present application.

The rotary compressor 100 according to an embodiment of the present application will be described below with reference to FIGS. 1 to 18. A slide shoe 4 is provided between the sliding plate 3 and the cam mechanism 2 of the rotary compressor 100, and one end of the sliding shoe 4 is connected to the sliding plate 3 is connected, and the sliding shoe 4 can be hingedly connected to the sliding plate 3, the sliding shoe 4 can rotate relative to the sliding plate 3, and the limiting rotation angle of the sliding shoe 4 relative to the central surface of the sliding plate groove 12 is less than 60°, the limiting rotation The angle is the maximum rotation angle, and the other end of the sliding shoe 4 presses against the cam mechanism 2. In this way, during the movement of the cam mechanism 2, the friction force from the cam mechanism 2 and the sliding plate 3 received by the sliding shoe 4 is small, so that its practical performance and reliability are greatly improved, which is beneficial to extend the rotary compressor 100 lifespan.

As shown in FIGS. 1 to 18, the rotary compressor 100 according to an embodiment of the present application includes: a cylinder 1, a sliding plate 3, a cam mechanism 2, and a sliding shoe 4. As shown in FIG. 1, the cylinder 1 is provided with a slider groove 12, the slider 3 is installed in the slider groove 12, the cam portion of the cam mechanism 2 is rotatably provided in the cylinder 1, it should be noted that the cam mechanism 2 is The eccentric setting in the cylinder 1, that is, the axis of the cam mechanism 2 does not coincide with the axis of the cylinder 1, and the slide groove 12 is provided on the side wall of the cylinder 1 and extends in the radial direction of the cylinder 1, the slide 3 is in the slide groove 12 The inside can slide in the radial direction. Wherein, when the cam mechanism 2 rotates in the cylinder 1, the cam portion of the cam mechanism 2 is adapted to press against the slider 3, so that the slider 3 moves in the radial direction.

In some embodiments, as shown in FIG. 1, the cylinder 1 has a compression chamber 11, the cam mechanism 2 includes a crankshaft and a piston, the piston is sleeved outside the eccentric portion of the crankshaft, the cam portion of the cam mechanism 2 includes a piston, and the piston is rotatably Set in the cylinder 1, the piston is rotatably fitted in the compression chamber 11 under the drive of the crankshaft. Of course, the cam mechanism 2 can also be integrated.

Among them, the sliding shoe 4 is pressed against the outer circumferential surface of the cam portion, the first of the sliding piece 3 and the sliding shoe 4 is provided with an opening groove 5, the opening groove 5 is arc-shaped, and the first of the sliding piece 3 and the sliding shoe 4 The two include an articulated joint, the articulated joint is arc-shaped, the articulated joint is articulated with the opening slot 5, the second of the sliding piece 3 and the sliding shoe 4 is connected to the articulated joint through the neck, and the width of the neck is smaller than the width of the articulated joint . In this way, the sliding shoe 4 can rotate left and right relative to the sliding plate 3, and when the sliding shoe 4 rotates relative to the sliding plate 3 until the first of the sliding plate 3 and the sliding shoe 4 presses against the neck, the two relatively rotate to the limit angle.

For example, the sliding plate 3 is provided with an arc-shaped opening groove 5, and the sliding shoe 4 includes an arc-shaped hinge joint, the hinge joint is hinged with the opening groove 5, and the sliding shoe 4 is connected with the hinge joint through the neck, and the width of the neck is smaller than the hinge The width of the head. Or the sliding shoe 4 is provided with an arc-shaped opening groove 5, and the sliding plate 3 includes an arc-shaped hinge joint, the hinge joint is hinged with the opening groove 5, and the sliding plate 3 is connected with the hinge joint through the neck, and the width of the neck is smaller than the hinge The width of the head.

Furthermore, in one embodiment, the limit rotation angle of the sliding shoe 4 relative to the center plane of the slider groove 12 is less than 60°, where the limit angle is the maximum rotation angle. In this way, a relatively rotatable connection relationship between the sliding shoe 4 and the sliding plate 3 can be ensured, the area of the cooperation between the sliding shoe head 41 and the sliding plate 3 is small, and the friction area between the sliding shoe head 41 and the sliding plate 3 is relatively large Small, that is, the total working area of the shoe head 41 is small, which can reduce the processing difficulty of the shoe 4 and save the processing cost.

According to the rotary compressor 100 of the embodiment of the present application, the stress of the contact between the sliding plate 3 and the outer surface of the cam portion is greatly improved, the lubrication state between the sliding plate 3 and the friction pair of the cam portion is improved, and the sliding plate is greatly reduced 3 The friction power consumption between the friction pair of the cam part also greatly improves its reliability, the structure is simple, the cost is low, and the use effect is better.

In some embodiments, the sliding piece 3 is provided with an open groove 5, the sliding shoe 4 includes a sliding shoe head 41, a sliding shoe neck 44 and a sliding shoe end 42 connected in sequence, the sliding shoe head 41 and the sliding shoe end The portion 42 is connected by the shoe neck 44, the shoe head 41 presses against the slider 3, and the shoe head 41 and the slider 3 form a sliding friction pair, and the shoe end 42 presses against the outer circle of the cam portion The width of the sliding shoe neck 44 is smaller than the width of the sliding shoe head 41, the sliding shoe neck 44 is the neck, and the sliding shoe head 41 includes a hinge joint. As shown in FIGS. 1, 6 and 8-9, the opening groove 5 is provided at the first end of the sliding plate 3, that is, the opening groove 5 is provided at the end of the sliding plate 3 close to the head 41 of the sliding shoe, and the opening groove 5 Opening into the compression chamber 11 of the cylinder 1, as shown in FIGS. 1, 2-3 and 8-9, the end of the shoe head 41 facing the slider 3 is formed with a hinged surface. In this way, the shoe head 41 extends into the opening groove 5 so that the hinge surface and the inner wall surface of the opening groove 5 fit together, and when the rotary compressor 100 operates, the shoe head 41 and the opening groove 5 slide relatively, The slider 3 rotates about the head 41 of the shoe. Thus, the friction force between the shoe head 41 and the inner wall of the opening groove 5 is small, which can reduce the wear of the shoe head 41, extend the service life of the shoe 4, and ensure that the compressor can be used safely for a long time.

In some other embodiments, the sliding shoe 4 is provided with an opening groove 5, the sliding plate 3 has a sliding plate neck 31 and a sliding plate head 32, the sliding plate head 32 includes a hinge joint, and the sliding plate neck 31 is a neck, The width of the slider neck 31 is smaller than the width of the slider head 32. As shown in FIGS. 4-5 and 10-11, the opening groove 5 is provided in the shoe head 41, and the opening groove 5 is opened toward the direction of the sliding plate 3, as shown in FIGS. 7 and 10-11 The first end of the slider 3 includes a slider head 32. In this way, the slider head 32 extends into the opening groove 5 so that the slider head 32 and the inner wall surface of the opening groove 5 fit together, and when the compressor operates during rotation, the slider head 32 and the opening groove 5 face each other When sliding, the slider head 32 rotates left and right relative to the shoe head 41. Therefore, the friction force between the slidable head 32 and the shoe 4 is small, thereby reducing the wear of the shoe 4, extending the service life of the shoe 4, and ensuring that the compressor can be used safely and effectively for a long time.

In one embodiment, as shown in FIG. 1, the sliding shoe 4 includes a sliding shoe head 41, a sliding shoe neck 44 and a sliding shoe end 42. The sliding shoe head 41 and the sliding shoe end 42 pass through the sliding shoe neck 44 is connected, the shoe head 41, the shoe neck 44 and the shoe end 42 are integrally formed, the shoe head 41 is provided with an opening groove 5, and the shoe head 41 is hinged with the slider head 31, sliding The boot head 41 is pressed against the sliding plate 3, and the sliding head 41 and the sliding head 31 form a sliding friction pair, so that the sliding head 41 can rotate relative to the sliding plate 3, and the sliding head 41 The limit rotation angle with respect to the central surface of the slider groove 12 is less than 60°, and the limit rotation angle is the maximum rotation angle. The shoe end portion 42 is pressed against the outer circumferential surface of the cam portion. During the operation of the rotary compressor 100, the shoe end portion 42 and the outer circumferential surface of the cam portion slidingly cooperate to form a sliding friction pair. The material of the sliding shoe 4 may be one of steel, cast iron, plastic, alloy, and ceramic.

The first end of the sliding plate 3 extends into the compression cavity 11, and the first end of the sliding plate 3 abuts against the head 41 of the sliding shoe. In this way, when the cam mechanism 2 rotates in the cylinder 1, the cam portion of the cam mechanism 2 pushes the sliding shoe 4 to move outward in the radial direction, and at the same time, the sliding shoe 4 pushes the sliding plate 3 to move outward in the radial direction. It should be noted that the second end of the slider 3 is connected with an elastic member for driving the slider 3 to move inward in the radial direction, and when the cam mechanism 2 rotates until the cam portion and the slider groove 12 are staggered, the elastic member drives the slider The blade 3 moves inward in the radial direction until the first end of the slider 3 extends into the compression cavity 11 so that when the cam portion moves to face the slider groove 12, the slider 3 is pushed again to move outward in the radial direction. The reciprocating movement of the slide 3 is realized. Among them, the compression chamber 11 is filled with lubricating oil, and the lubricating oil is used to reduce the friction between the sliding plate 3, the cam portion and the sliding shoe 4 to reduce wear.

During the operation of the rotary compressor 100, the sliding plate 3 reciprocates along the sliding plate groove 12, the end 42 of the shoe always presses against the outer circumferential surface of the cam portion, and the head 41 of the shoe and the sliding plate 3 slide relative to each other. Slice 3 rotates left and right.

It can be understood that by providing the sliding shoe 4 between the sliding plate 3 and the cam portion, the contact stress between the sliding plate 3 and the cam portion can be greatly reduced, and the lubrication state is basically changed from the original boundary lubrication to fluid dynamic pressure lubrication. The friction power consumption is effectively reduced, and the leakage of cold between the slider 3 and the cam portion is also reduced.

Wherein, the width of the shoe end 42 is greater than the thickness of the slider 3, that is, the width of the end of the shoe end 42 that abuts the cam portion is greater than the thickness of the slider 3, so that the shoe head 41 is opposite to the slider 3 When rotating to the left and right, after rotating to a certain angle, the end 42 of the shoe is in contact with the first end of the sliding plate 3, thereby ensuring a relatively rotatable connection between the sliding shoe 4 and the sliding plate 3. The cooperation area between the head 41 and the slider 3 is small, and the friction area between the shoe head 41 and the slider 3 is small, that is, the total working area of the shoe head 41 is small, which can reduce the difficulty of processing the shoe 4, Save processing costs.

When the shoe head 41 rotates left and right relative to the slider 3 to a certain moment, the current working area of the shoe head 41 is large, the stress of the contact between the shoe head 41 and the slider 3 is small, and the shoe head 41 An oil film is easily formed between the sliding plates 3, thereby reducing the friction force of the contact surface and reducing wear.

There is sliding friction between the shoe head 41 and the sliding piece 3, and sliding friction between the shoe end 42 and the cam portion. It is easy to form an oil film between the pressing surface 43 and the outer surface, and to maintain a sufficient thickness of the oil film Therefore, the contact area between the shoe 4 and the cam portion is effectively reduced, the local stress of the shoe end 42 is prevented from being roughly destroyed, and the safety of the shoe 4 is improved. The structure of the sliding shoe 4 can improve the contact stress between the sliding plate 3 and the cam portion, optimize the lubrication state between the sliding plate 3 and the friction pair of the cam portion, and greatly reduce the frictional power consumption between the sliding plate 3 and the friction pair of the cam portion.

In some embodiments, the width of the shoe head 41 is smaller than the thickness of the slider 3, so that the shoe head 41 has enough space in the slider groove 12 to avoid the shoe after the first end of the slider 3 abuts The head 41 rotates left and right relative to the slider 3, so that the shoe head 41 can naturally rotate with the slider 3, thereby reducing the friction between the shoe end 42 and the cam portion, and reducing the shoe 4 Wear and extend the service life.

In some embodiments, the first end of the sliding plate 3 and one of the shoe heads 41 are provided with an arc-shaped opening groove 5, and the other includes an arc-shaped hinge surface, and the hinge surface is hinged with the opening groove 5. In this way, the first end of the slider 3 is hingedly connected to the shoe head 41, whereby the slider 3 can rotate left and right relative to the shoe head 41, and the slider 3 and the shoe head 41 form a sliding friction pair, Thereby, the friction between the slider 3 and the shoe head 41 is reduced, and the wear of the shoe head 41 is reduced.

In some embodiments, the opening groove 5 and the hinge surface are both arc-shaped, the radius of curvature of the opening groove 5 is R1, and the radius of curvature of the hinge joint is R2, satisfying: 1≤R1/R2≤1.2, such as R1/R2= 1, or R1/R2 = 1.1, or R1/R2 = 1.2, that is, the value of the radius of curvature of the opening groove 5 is close to the value of the radius of curvature of the hinge joint, so that the two have a larger contact surface, and avoid sliding the shoe head The local stress between the portion 41 and the sliding plate 3 is too large, and the value of the radius of curvature of the opening groove 5 is greater than the value of the radius of curvature of the hinge joint, so that there is enough space between the shoe head 41 and the sliding plate 3 to achieve The relative rotation reduces the wear of the sliding shoe 4, improves the safety of the compressor, and is convenient for long-term use.

In some embodiments, the arc of the open slot 5 is greater than 180°, and the arc of the hinge joint is greater than 180°, that is, the arc of the open slot 5 and the hinge joint are both greater than 180°. As shown in FIGS. 8-9, the portion of the shoe head 41 with the hinged surface is located in the opening groove 5 of the slider 3, and the arc of the opening groove 5 covering the shoe head 41 is greater than 180°, thereby, It can avoid that the portion of the shoe head 41 provided with the hinged surface comes out of the opening groove 5 of the sliding plate 3; as shown in FIGS. 10-11, the shoe head 41 has the opening groove 5, the first of the sliding plate 3 At least part of the end has an articulated surface, and the part of the sliding plate 3 with the articulated surface is located in the opening groove 5, and the opening groove 5 covers the portion of the sliding plate 3 with the articulated surface by a curvature greater than 180°, thereby avoiding sliding The part of the blade 3 having the hinge surface comes out of the opening groove 5 of the shoe head 41. In this way, by reasonably setting the arc of the opening groove 5 and the hinge joint, it can ensure that when the sliding plate 3 and the shoe head 41 are hingedly connected, the relative rotation can be stably and reliably, and the stable hinge relationship between the two can be ensured. The stability of the compressor ensures that the compressor can be used safely for a long time.

In some implementations, the sliding shoe end 42 has a pressing surface 43 for pressing the cam portion, wherein the pressing surface 43 is one of an arc surface or a flat surface, as shown in FIGS. 2 and 4 As shown in FIGS. 8-12 and 14-16, the pressing surface 43 is arc-shaped; as shown in FIGS. 3 and 5, the pressing surface 43 is flat. In this way, the friction force between the shoe end 42 and the cam part is a sliding friction force, thereby greatly reducing the friction force between the shoe end 42 and the cam part, and also making its reliability extremely great Improvement, simple structure, low cost, and good use effect.

In one embodiment, the pressing surface 43 is an arc-shaped surface, and the pressing surface 43 is inscribed with the outer circular surface of the cam surface, so that an oil film is easily formed between the pressing surface 43 and the outer circular surface and can be maintained The thickness of the oil film is sufficient to effectively reduce the contact area between the shoe 4 and the cam portion. During the operation of the rotary compressor 100, the pressing surface 43 and the outer circumferential surface of the cam portion are slidingly fitted to form a sliding friction pair to reduce the friction loss of the sliding shoe 4.

In some embodiments, the radius of curvature of the pressing surface 43 is R3, and the radius of curvature of the outer circular surface is R4, satisfying 0.8≤R4/R3<1, such as R4/R3=0.85, or R4/R3=0.9, or R4/R3=0.95. In this way, the radius of curvature of the pressing surface 43 is greater than the radius of curvature of the outer circular surface, so that when the pressing surface 43 presses against the outer circular surface, the pressing surface 43 and the outer circular surface are inscribed to fit, thereby , The pressing surface 43 and the outer circumferential surface of the cam portion are slidingly fitted to form a sliding friction pair, which reduces the friction loss of the shoe 4. Moreover, the value of R4/R3 should not be too small, too small may easily cause the contact area between the pressing surface 43 and the outer circular surface to be too small, and the contact stress to be too large, which may cause the structural damage of the sliding shoe 4 in severe cases. Therefore, setting R4/R3 within a reasonable range can ensure the effective sliding friction of the two, and avoid excessive local contact stress, thereby improving the safety of the structure of the sliding shoe 4.

In some embodiments, the width of the end of the shoe end 42 opposite to the outer surface is d, and the radius of the outer surface is R, satisfying: 0.1≤d/R≤0.65, such as d/R=0.2, or d /R = 0.4, or d/R = 0.6, therefore, the relative dimensions of the shoe end 42 and the outer circular surface are designed reasonably, an oil film is easily formed between the pressing surface 43 and the outer circular surface, and sufficient The thickness of the oil film effectively reduces the contact area between the sliding shoe 4 and the cam portion, greatly improves the contact stress between the sliding plate 3 and the outer surface of the cam portion, and improves the friction between the sliding plate 3 and the cam portion friction pair In the lubricated state, an oil film is easily formed between the sliding shoe 4 and the sliding plate 3, and a sufficient thickness of the oil film can be maintained, so that the contact area between the sliding shoe 4 and the sliding plate 3 can be effectively reduced, thereby effectively reducing the friction pair Friction loss.

In some embodiments, as shown in FIGS. 1, 6 and 8-9, the opening groove 5 is provided at the first end of the sliding plate 3, that is, the opening groove 5 is provided at the sliding plate 3 near the head 41 of the sliding shoe At one end, and the opening groove 5 is opened toward the compression chamber 11 of the cylinder 1, as shown in FIGS. 1, 2 to 3, and 8 to 9, the end of the shoe head 41 facing the slider 3 is formed with a hinge surface. Among them, the hinged surface is an arc-shaped surface, and the radius of the hinged surface is r, and the thickness of the sliding plate 3 is T, satisfying: 0.312≤r/T≤0.88, such as r/T=0.4, or r/T=0.6, Or, r/T=0.8, that is, the thickness of the sliding plate 3 is greater than the radius of the hinge surface. Therefore, after the sliding plate 3 is provided with the opening groove 5 at one end of the sliding shoe 4, sufficient space can be reserved to avoid the sliding shoe 4 Relative rotation of the sliding plate 3, so that when the rotary compressor 100 works, the sliding shoe 4 can effectively rotate relative to the sliding plate 3 under the action of the cam portion, thereby reducing friction, and the sliding shoe head 41 The size of the slider should not be too small relative to the thickness of the slider 3. Too small may cause excessive contact stress between the shoe head 41 and the slider 3 to increase the wear of the shoe 4, thus, the r/T is designed to be reasonable Within the scope, it can be ensured that the sliding shoe 4 and the sliding piece 3 can realize relative rotation, and it is conducive to a smaller local stress of the sliding shoe 4, improves safety, and greatly improves reliability.

In some embodiments, as shown in FIGS. 1, 2-3 and 8-9, the opening grooves 5 are arranged symmetrically along the thickness direction of the sliding plate 3, so that when the sliding shoe 4 rotates relative to the sliding plate 3, The rotation angle of the sliding shoe 4 relative to the sliding plate 3 to the two sides is the same, so that the contact stress of the sliding shoe 4 on both sides and the sliding plate 3 is more balanced during the rotation, thus, the sliding plate 3 and the sliding plate can be avoided The local stress between the boots 4 is too large, which improves the safety of the structure of the boots 4.

Of course, the opening groove 5 can also be provided asymmetrically along the thickness direction of the sliding plate 3, so that the relative rotation of the sliding shoe 4 and the sliding plate 3 can be realized, and the structural design has high flexibility.

In one embodiment, the open slot 5 includes two arcs, which are located on both sides of the axis of the sliding plate 3, and the two arcs have the same radius of curvature, the centers of curvature coincide, and the center angles are different. It can be understood that when the cam mechanism 2 rotates in the compression chamber 11, the pressure on both sides of the cam portion is different. Therefore, the asymmetric arrangement of the opening groove 5 can make the pressure on both sides of the shoe head 41 more balanced, avoiding one side Excessive pressure increases the stability of the compressor.

In some embodiments, one end of the sliding shoe 4 forms a sliding friction pair with the sliding plate 3, the other end of the sliding shoe 4 has a pressing surface 43 that is pressed against the outer circular surface of the cam portion, and the pressing surface 43 is provided with an oil groove 7. Lubricating oil can be stored in the oil groove 7, so that during the rotation of the cam mechanism 2, the lubricating oil in the oil groove 7 flows between the pressing surface 43 and the outer surface and forms an oil film, and maintains a sufficient thickness of the oil film. To lubricate the frictional contact between the two, thereby reducing the wear of the sliding shoe 4 and the cam portion, making the structure of the sliding shoe 4 and the cam portion more stable, and improving the safety and reliability of the overall structure of the rotary compressor 100 .

According to the rotary compressor 100 of the embodiment of the present application, one end of the sliding shoe 4 forms a sliding friction pair with the sliding plate 3, and the pressing surface 43 at the other end of the sliding shoe 4 abuts against the outer circular surface of the cam portion, and the pressing surface 43 is provided with an oil groove 7, which is used to provide lubricating oil to the contact surface of the shoe 4 and the cam portion, so as to reduce the wear of the shoe 4 and the cam portion, improve the safety of the rotary compressor 100, and facilitate long-term use.

In some embodiments, as shown in FIG. 18, there are a plurality of oil grooves 7, and the plurality of oil grooves 7 are spaced and distributed on the pressing surface 43, so that each area where the pressing surface 43 and the outer surface contact has lubricating oil. As a result, the lubricating effect of the lubricating oil on the contact surface can be enhanced to ensure that all positions of the contact surface can be uniformly lubricated to improve the lubrication effect, thereby effectively reducing the wear of the sliding shoe 4 and the cam portion and improving the structure of the sliding shoe 4 and the cam portion Stability and reliability. Wherein, the oil groove 7 may be a cylindrical oil hole structure.

In some embodiments, the oil grooves 7 include multiple groups, and the multiple oil grooves 7 are spaced apart along the height direction of the sliding shoe 4, and each group of oil grooves 7 includes a plurality of oil grooves 7 along the width of the sliding shoe 4. They are spaced apart in the direction. Therefore, oil grooves 7 are provided at each position of the pressing surface 43, which can increase the oil storage capacity of the oil groove 7 on the pressing surface 43, thereby enhancing the lubricating effect of the lubricating oil on the contact surface and improving the lubricating effect. Reducing the wear of the sliding shoe 4 and the cam part makes the structure of the compressor more stable, which is convenient for long-term safe use.

In one embodiment, the plurality of oil grooves 7 of two adjacent groups are arranged one-to-one in the height direction of the sliding shoe 4, so that the plurality of oil grooves 7 of multiple groups are all arranged in the opposite direction of the height direction of the sliding shoe 4. In this way, the distribution of the plurality of oil grooves 7 on the pressing surface 43 can be more regular and orderly, the distribution of the lubricating oil in each position of the pressing surface 43 is more uniform, the lubrication effect is more, and the processing of the sliding shoe 4 is facilitated, and the processing is reduced cost. Of course, a plurality of oil grooves 7 in two adjacent groups can also be staggered along the height direction of the sliding shoe 4, so that the contact surface between the sliding shoe 4 and the cam portion can be effectively lubricated.

In some embodiments, the oil groove 7 extends along the height direction of the shoe 4, and both ends of the oil groove 7 extend to the edge of the pressing surface 43, as shown in FIGS. 13 and 17, the oil groove 7 is shown in the figure The upper end of the pump extends to the lower end shown in the figure, so that the overall length of the oil groove 7 is large, and then a sufficient amount of lubricant can be stored, which can ensure that the contact surface of the shoe 4 and the cam portion is effectively lubricated, reducing slip Wear of the boot 4 and cam part.

In some embodiments, the extending direction of the oil groove 7 is parallel to the height direction of the sliding shoe 4, as shown in FIG. 13, the extending length of the oil groove 7 is the same as the height of the sliding shoe 4, and as shown in FIGS. 12 and 14-15 It shows that the distance between the oil groove 7 and the two sides of the sliding shoe 4 is the same, so that the lubricating oil in the oil groove 7 can all flow to the contact surface of the sliding shoe 4 and the cam portion, ensuring the lubrication effect of each area of the contact surface More uniform and full.

In other embodiments, as shown in FIGS. 16-17, the extending direction of the oil groove 7 forms an angle with the height direction of the shoe 4, and the oil groove 7 extends along the upper end as shown in the figure to The lower end, and the extension length of the oil groove 7 is greater than the height of the sliding shoe 4. In this way, sufficient oil can be stored in the oil groove 7, and when the cam mechanism 2 rotates, the oil in the oil groove 7 can sufficiently lubricate the contact surface, improving the lubrication state between the shoe 4 and the cam portion. Furthermore, the frictional power consumption between the sliding shoe 4 and the cam portion is greatly reduced, and its reliability is greatly improved, which is convenient for long-term use.

In some embodiments, the cross section of the oil groove 7 is one of rectangular, arc and trapezoid. As shown in FIGS. 12 and 16, the cross section of the oil groove 7 is rectangular; as shown in FIG. 4, the cross section of the oil groove 7 is arc-shaped; as shown in FIG. 15, the cross section of the oil groove 7 is trapezoidal. Of course, the cross-sectional shape of the oil groove 7 is not limited to this, but may be other shapes, as long as it can store lubricating oil to lubricate the contact surface. The structure of the oil groove 7 has high flexibility, low restriction, and good practicality. And flexibility.

In some embodiments, the depth of the oil groove 7 is H, which satisfies: 0 μm<H<500 μm, such as H=200 μm, or H=300 μm, or H=400 μm, thereby storing oil in the oil groove 7 . It is understandable that the depth of the oil groove 7 should not be too large, too large will easily cause the structural strength of the sliding shoe 4 to be low, and the structure of the sliding shoe 4 may easily break when the sliding shoe 4 is stressed; the depth of the oil groove 7 should not be too small If it is too small, the volume of the oil groove 7 will become smaller, which affects the oil storage capacity of the oil groove 7. It cannot be guaranteed that the lubricating oil in the oil groove 7 can fully lubricate the contact surface. Therefore, setting the depth of the oil groove 7 within a reasonable range can ensure that the lubricating oil in the oil groove 7 effectively lubricates the contact surface, reduces the friction loss of the sliding shoe 4 and the cam portion, and at the same time ensures the stable structure of the sliding shoe 4.

This application also proposes a gas compression system.

According to the gas compression system of the embodiment of the present application, the rotary compressor 100 of any of the above embodiments is provided. The reliability of the rotary compressor 100 of the gas compression system is greatly improved, the structure is simple, and the cost is low. The use effect is good, which is conducive to improving the industry competitiveness of gas compression system.

This application also proposes a refrigeration system.

The refrigeration system according to the embodiment of the present application is provided with the rotary compressor 100 of any of the above embodiments. The rotary compressor 100 of the refrigeration system has better stability, simple structure, reliable and practical, and is convenient for long-term use.

This application also proposes a heat pump system.

The heat pump system according to the embodiment of the present application is provided with the rotary compressor 100 of any of the above embodiments. The rotary compressor 100 of the heat pump system has high energy efficiency, is not easy to wear, has better stability, simple structure, and processing cost Low and long service life.

A rotary compressor according to an embodiment of the present invention includes: an air cylinder provided with a sliding plate slot; a sliding plate mounted on the sliding plate groove; a cam mechanism, the cam portion of the cam mechanism may be Rotatably provided in the cylinder; a sliding shoe, the sliding shoe is pressed against the outer circumferential surface of the cam portion; wherein the sliding piece is provided with an arc-shaped opening groove, and the sliding shoe includes an arc-shaped hinge Head, the hinge joint is hinged with the opening groove, the sliding shoe is connected to the hinge joint through a neck, and the width of the neck is smaller than the width of the hinge joint; or the sliding shoe is provided with an arc The shape of the opening slot, the slider includes an arc-shaped hinge joint, the hinge joint is hinged with the opening slot, the slider is connected to the hinge joint through the neck, and the width of the neck is less than Describe the width of the hinge joint.

According to a rotary compressor according to an embodiment of the present invention, the sliding plate is provided with the opening groove, and the sliding shoe includes a sliding shoe head, a sliding shoe neck, and a sliding shoe end sequentially connected. The shoe head presses against the sliding plate and forms a sliding friction pair with the sliding plate, the sliding shoe end presses against the outer circumferential surface of the cam portion, and the width of the sliding shoe neck is smaller than The width of the head of the shoe, the neck of the shoe is the neck, and the head of the shoe includes the hinge joint.

According to a rotary compressor according to an embodiment of the present invention, the sliding shoe is provided with the opening groove, the sliding plate has a sliding plate neck and a sliding plate head, and the sliding plate head includes the hinge joint, The slider neck is the neck, and the width of the slider neck is smaller than the width of the slider head.

According to a rotary compressor according to an embodiment of the present invention, the sliding shoe includes a sliding shoe head, a sliding shoe neck and a sliding shoe end connected in sequence, the sliding shoe head is provided with the opening groove and is in contact with The sliding head is hinged, and the end of the sliding shoe is pressed against the outer circumferential surface of the cam portion.

According to a rotary compressor according to an embodiment of the present invention, the opening groove and the hinge surface are both arc-shaped, the radius of curvature of the opening groove is R1, and the radius of curvature of the hinge joint is R2, satisfying: 1 ≤R1/R2≤1.2.

According to a rotary compressor according to an embodiment of the present invention, the arc of the open groove is greater than 180°, and the arc of the hinge joint is greater than 180°.

According to the rotary compressor according to an embodiment of the present invention, the end of the shoe has a pressing surface for pressing the cam portion, and the pressing surface is one of an arc surface or a flat surface.

According to the rotary compressor of an embodiment of the present invention, the pressing surface is an arc-shaped surface, and the pressing surface is inscribed with the outer circular surface of the cam surface.

In the description of this specification, reference to the descriptions of the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" is meant to be combined with the implementation The specific features, structures, materials, or characteristics described in the examples or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art may understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of the present application, The scope of the application is defined by the claims and their equivalents.

Claims

A rotary compressor is characterized by comprising:

Air cylinder, the air cylinder is provided with a slide groove;

Slider, the slider is installed in the slider slot;

A cam mechanism, the cam portion of the cam mechanism is rotatably provided in the cylinder;

A sliding shoe, which presses against the outer circumferential surface of the cam portion; wherein

The sliding piece is provided with an arc-shaped opening groove, the sliding shoe includes an arc-shaped hinge joint, the hinge joint is hinged to the opening groove, the sliding shoe is connected to the hinge joint through a neck, and the The width of the neck is smaller than the width of the hinge joint;

Or the sliding shoe is provided with an arc-shaped opening groove, the slide plate includes an arc-shaped hinge joint, the hinge joint is hinged with the opening groove, the slide plate is connected to the hinge joint through a neck, and The width of the neck is smaller than the width of the hinge joint.
The rotary compressor according to claim 1, wherein the sliding plate is provided with the opening groove, and the sliding shoe includes a sliding shoe head, a sliding shoe neck and a sliding shoe end connected in sequence , The head of the sliding shoe presses against the sliding plate, and forms a sliding friction pair with the sliding plate, the end of the sliding shoe presses against the outer circumferential surface of the cam portion, the neck of the sliding shoe The width of is smaller than the width of the head of the shoe, the neck of the shoe is the neck, and the head of the shoe includes the hinge joint.
The rotary compressor according to claim 1, wherein the sliding shoe is provided with the opening groove, the sliding plate has a sliding plate neck and a sliding plate head, and the sliding plate head includes In the hinge joint, the slider neck is the neck, and the width of the slider neck is smaller than the width of the slider head.
The rotary compressor according to claim 3, wherein the sliding shoe comprises a sliding shoe head, a sliding shoe neck and a sliding shoe end connected in sequence, the sliding shoe head is provided with the The slot is open and hinged with the head of the sliding plate, and the end of the sliding shoe is pressed against the outer circumferential surface of the cam portion.
The rotary compressor according to any one of claims 1 to 4, wherein the opening groove and the hinge surface are both arc-shaped, the radius of curvature of the opening groove is R1, and the hinge The radius of curvature of the head is R2, satisfying: 1≤R1/R2≤1.2.
The rotary compressor according to any one of claims 1 to 5, wherein the arc of the open groove is greater than 180°, and the arc of the hinge joint is greater than 180°.
The rotary compressor according to any one of claims 1 to 6, wherein the end of the shoe has a pressing surface for pressing the cam portion, and the pressing surface is arc-shaped One of a face or plane.
The rotary compressor according to claim 7, wherein the pressing surface is an arc-shaped surface, and the pressing surface is inscribed with the outer circular surface of the cam surface.
A gas compression system characterized by having the rotary compressor according to any one of claims 1-8.
A refrigeration system characterized by having the rotary compressor according to any one of claims 1-8.
A heat pump system characterized by having the rotary compressor according to any one of claims 1-8.