CN111287966A - Rotary compressor, gas compression system, refrigeration system and heat pump system - Google Patents

Abstract

The invention discloses a rotary compressor, a gas compression system, a refrigeration system and a heat pump system, wherein the rotary compressor comprises: the air cylinder is provided with a slide sheet groove; the sliding sheet is arranged in the sliding sheet groove; a cam mechanism, a cam portion of which is rotatably provided in the cylinder; the sliding shoe is pressed against the outer circular surface of the cam portion, an arc-shaped open slot is formed in the first sliding piece and the first sliding shoe, the second sliding piece and the second sliding shoe comprise arc-shaped hinged joints, the hinged joints are hinged to the open slot, the second sliding piece and the second sliding shoe are connected with the hinged joints through necks, and the width of the necks is smaller than the width of the hinged joints. The rotary compressor of the invention greatly improves the contact stress of the sliding vane and the excircle surface of the cam part, improves the lubricating state between the sliding vane and the friction pair of the cam part, and has simple structure, low cost and better use effect.

Description

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

Technical Field

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

Background

In the compressor mechanism, the friction loss between the slip sheet 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 vane and the outer circumferential surface of the piston, and the structure is intended to change sliding friction between the piston and the sliding vane into rolling friction, so that friction power consumption is effectively reduced. However, the requirement of the needle roller structure on the reliability is extremely high, the contact stress between the needle roller and the piston is rapidly increased, the abrasion resistance of the needle roller material is challenged, the needle roller structure is easy to have the risk of needle roller rolling dead-locking failure, once the needle roller rolling failure occurs, the needle roller is rapidly worn until the compressor is dead-locked and failed, and an improvement space exists.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a rotary compressor, which has a reasonable structure, and can effectively reduce the friction loss between the sliding vane and the piston, and prolong the service life of the compressor.

The rotary compressor according to an embodiment of the present invention includes: the air cylinder is provided with a slide sheet groove; the sliding sheet is arranged in the sliding sheet groove; a cam mechanism, a cam portion of which is rotatably provided in the cylinder; the sliding shoe is pressed against the outer circular surface of the cam portion, an arc-shaped open slot is formed in the first sliding piece and the first sliding shoe, the second sliding piece and the second sliding shoe comprise arc-shaped hinged joints, the hinged joints are hinged to the open slot, the second sliding piece and the second sliding shoe are connected with the hinged joints through necks, and the width of the necks is smaller than the width of the hinged joints.

According to the rotary compressor provided by the embodiment of the invention, the contact stress of the sliding vane and the outer circular surface of the cam part is greatly improved, the lubricating state between the sliding vane and the friction pair of the cam part is improved, the friction power consumption between the sliding vane and the friction pair of the cam part is greatly reduced, the reliability of the rotary compressor is also greatly improved, the structure is simple, the cost is low, and the using effect is better.

According to the rotary compressor of one embodiment of the present invention, the sliding vane is provided with the open slot, the sliding shoe includes a sliding shoe head, a sliding shoe neck, and a sliding shoe end, which are connected in sequence, the sliding shoe head abuts against the sliding vane and forms a sliding friction pair with the sliding vane, the sliding shoe end abuts against an outer circumferential surface of the cam portion, a width of the sliding shoe neck is smaller than a width of the sliding shoe head, the sliding shoe neck is the neck, and the sliding shoe head includes the hinge joint.

According to the rotary compressor provided by the embodiment of the invention, the sliding shoe is provided with the open slot, the sliding vane is provided with a sliding vane neck and a sliding vane head, the sliding vane head comprises the hinge joint, the sliding vane neck is the neck, and the width of the sliding vane neck is smaller than that of the sliding vane head.

According to the rotary compressor of one embodiment of the present invention, the sliding shoe includes a sliding shoe head portion, a sliding shoe neck portion and a sliding shoe end portion, which are connected in sequence, the sliding shoe head portion is provided with the open slot and is hinged to the sliding shoe head portion, and the sliding shoe end portion is pressed against the outer circumferential surface of the cam portion.

According to the rotary compressor of one 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, so that: R1/R2 is more than or equal to 1 and less than or equal to 1.2.

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

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

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

The invention also provides a gas compression system.

According to the embodiment of the invention, the gas compression system is provided with the rotary compressor in any one of the embodiments.

The invention also provides a refrigerating system.

The refrigeration system according to the embodiment of the invention is provided with the rotary compressor in any one of the embodiments.

The invention also provides a heat pump system.

According to the embodiment of the invention, the heat pump system is provided with the rotary compressor in any one of the embodiments.

The advantages of the gas compression system, the refrigeration system, the heat pump system and the rotary compressor are the same compared with the prior art, and are not described herein again.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a rotary compressor according to an embodiment of the present invention;

FIGS. 2-5 are schematic structural views of a slipper according to an embodiment of the invention;

6-7 are schematic structural views of a slipper according to an embodiment of the invention;

FIGS. 8-11 are schematic views of a slipper shoe and slipper mating configuration according to an embodiment of the invention;

fig. 12-18 are schematic views of a slipper and its oil groove according to an embodiment of the present invention.

Reference numerals:

in the rotary compressor (100),

the sliding vane structure comprises a cylinder 1, a compression cavity 11, a sliding vane groove 12, a cam mechanism 2, a sliding vane 3, a sliding vane neck 31, a sliding vane head 32, a sliding shoe 4, a sliding shoe head 41, a sliding shoe end 42, a sliding shoe neck 44, a pressing surface 43, an opening groove 5 and an oil groove 7.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A rotary compressor 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 18, in which a shoe 4 is disposed between a vane 3 and a cam mechanism 2 of the rotary compressor 100, one end of the shoe 4 is connected to the vane 3, the shoe 4 is hingedly connected to the vane 3, the shoe 4 is rotatable left and right with respect to the vane 3, a limit rotation angle of the shoe 4 with respect to a center plane of a vane slot 12 is less than 60 °, the limit rotation angle is a maximum rotation angle, and the other end of the shoe 4 presses the cam mechanism 2. In this way, in the process of the movement of the cam mechanism 2, the friction force of the sliding shoe 4 from the cam mechanism 2 and the sliding vane 3 is small, so that the practical performance and reliability are greatly improved, and the service life of the rotary compressor 100 is prolonged.

As shown in fig. 1 to 18, a rotary compressor 100 according to an embodiment of the present invention includes: cylinder 1, gleitbretter 3, cam mechanism 2 and slipper 4. As shown in fig. 1, the cylinder 1 is provided with a slide groove 12, the slide 3 is mounted in the slide 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 eccentrically provided in the cylinder 1, that is, the axis of the cam mechanism 2 does not coincide with the axis of the cylinder 1, the slide groove 12 is provided on the side wall of the cylinder 1 and extends in the radial direction of the cylinder 1, and the slide 3 is slidable in the radial direction in the slide groove 12. When the cam mechanism 2 rotates in the cylinder 1, the cam part of the cam mechanism 2 is suitable for pressing the sliding sheet 3, so that the sliding sheet 3 moves along 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 an eccentric portion of the crankshaft, the cam portion of the cam mechanism 2 includes a piston, the piston is rotatably disposed in the cylinder 1, and the piston is rotatably fitted in the compression chamber 11 under the driving of the crankshaft. Of course the cam mechanism 2 may also be integrated.

The sliding shoe 4 is pressed against the outer circular surface of the cam portion, a first one of the sliding piece 3 and the sliding shoe 4 is provided with an open slot 5, the open slot 5 is arc-shaped, a second one of the sliding piece 3 and the sliding shoe 4 comprises a hinge joint, the hinge joint is arc-shaped and is hinged with the open slot 5, the second one of the sliding piece 3 and the sliding shoe 4 is connected with the hinge joint through a neck, and the width of the neck is smaller than that of the hinge joint, so that the sliding shoe 4 can rotate left and right relative to the sliding piece 3, and when the sliding shoe 4 rotates relative to the sliding piece 3 to press against the neck of the first one of the sliding piece 3 and the sliding shoe 4, the sliding shoe and the sliding shoe can rotate relative to a limit angle, and in one embodiment, the limit angle of the sliding shoe 4 relative to the central plane of the sliding piece groove 12 is smaller than 60 degrees. Therefore, the connection relation between the sliding shoe 4 and the sliding sheet 3 can be ensured to be relatively rotatable, the matching area of the sliding shoe head part 41 and the sliding sheet 3 is small, the friction area between the sliding shoe head part 41 and the sliding sheet 3 is small, namely the total working area of the sliding shoe head part 41 is small, the processing difficulty of the sliding shoe 4 can be reduced, and the processing cost is saved.

According to the rotary compressor 100 of the embodiment of the invention, the contact stress of the sliding vane 3 and the outer circular surface of the cam part is greatly improved, the lubrication state between the sliding vane 3 and the friction pair of the cam part is improved, the friction power consumption between the sliding vane 3 and the friction pair of the cam part is greatly reduced, the reliability is also greatly improved, the structure is simple, the cost is low, and the using effect is better.

In some embodiments, the sliding piece 3 is provided with an open slot 5, the sliding shoe 4 comprises a sliding shoe head 41, a sliding shoe neck 44 and a sliding shoe end 42 which are connected in sequence, the sliding shoe head 41 and the sliding shoe end 42 are connected through the sliding shoe neck 44, the sliding shoe head 41 is pressed against the sliding piece 3, the sliding shoe head 41 and the sliding piece 3 form a sliding friction pair, the sliding shoe end 42 is pressed against the outer circular surface of the cam portion, the width of the sliding shoe neck 44 is smaller than that of the sliding shoe head 41, the sliding shoe neck 44 is a neck, and the sliding shoe head 41 comprises a hinge joint. As shown in fig. 1, 6 and 8-9, the open slot 5 is provided at a first end of the sliding vane 3, that is, the open slot 5 is provided at an end of the sliding vane 3 close to the sliding shoe head 41, and the open slot 5 is opened toward the inside of the compression chamber 11 of the cylinder 1, and as shown in fig. 1, 2-3 and 8-9, an end of the sliding shoe head 41 facing the sliding vane 3 is formed with a hinge surface. Thus, the shoe head 41 extends into the open groove 5 so that the hinge surface is in contact with the inner wall surface of the open groove 5, and when the rotary compressor 100 operates, the shoe head 41 slides relative to the open groove 5, and the vane 3 rotates left and right relative to the shoe head 41. Therefore, the friction force between the slipper head part 41 and the inner wall of the opening groove 5 is small, the abrasion of the slipper head part 41 can be reduced, the service life of the slipper 4 is prolonged, and the long-term safe use of the compressor is ensured.

In other embodiments, the slipper shoe 4 is provided with an open slot 5, the slipper 3 has a slipper neck 31 and a slipper head 32, the slipper head 32 comprises a hinge joint, the slipper neck 31 is a neck, and the width of the slipper neck 31 is smaller than the width of the slipper head 32. As shown in fig. 4-5 and 10-11, the open slot 5 is provided at the shoe head 41, and the open slot 5 is opened toward the direction of approaching the slider 3, as shown in fig. 7 and 10-11, the first end of the slider 3 includes the slider head 32. In this way, the vane head portion 32 extends into the open groove 5 so that the vane head portion 32 is in contact with the inner wall surface of the open groove 5, and when the compressor is operated during rotation, the vane head portion 32 slides relative to the open groove 5, and the vane head portion 32 rotates left and right relative to the shoe head portion 41. Therefore, the friction force between the sliding sheet head part 32 and the sliding shoe 4 is small, so that the abrasion of the sliding shoe 4 can be reduced, the service life of the sliding shoe 4 is prolonged, and the compressor can be safely and effectively used 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 are connected by the sliding shoe neck 44, the sliding shoe head 41, the sliding shoe neck 44 and the sliding shoe end 42 are integrally formed, the sliding shoe head 41 is provided with an open slot 5, the sliding shoe head 41 is hinged with the sliding shoe head 31, the sliding shoe head 41 is pressed against the sliding sheet 3, and the sliding shoe head 41 and the sliding shoe head 31 form a sliding friction pair, so that the sliding shoe head 41 can rotate left and right relative to the sliding sheet 3, and the limit rotation angle of the sliding shoe head 41 relative to the central plane of the sliding sheet slot 12 is less than 60 °, and the limit rotation angle is the maximum rotation angle. The end 42 of the sliding shoe is pressed against the outer circumferential surface of the cam portion, and during the operation of the rotary compressor 100, the end 42 of the sliding shoe is in sliding fit with the outer circumferential surface of the cam portion to form a sliding friction pair. Wherein, the material of the sliding shoe 4 can be one of steel, cast iron, plastic, alloy and ceramic.

The first end of the sliding piece 3 extends into the compression chamber 11, and the first end of the sliding piece 3 abuts against the sliding shoe head 41. Thus, 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 radially outward, and simultaneously the sliding shoe 4 pushes the sliding vane 3 to move radially outward. It should be noted that, the second end of the sliding vane 3 is connected with an elastic element for driving the sliding vane 3 to move inward along the radial direction, and when the cam mechanism 2 rotates until the cam portion is staggered with the sliding vane slot 12, the elastic element drives the sliding vane 3 to move inward along the radial direction until the first end of the sliding vane 3 extends into the compression cavity 11, so that when the cam portion moves to be aligned with the sliding vane slot 12, the sliding vane 3 is pushed to move outward along the radial direction again, and the reciprocating motion of the sliding vane 3 is realized. In which a compression chamber 11 is filled with a lubricating oil for reducing a frictional force among the vane 3, the cam portion and the shoe 4 to reduce wear.

In the operation process of the rotary compressor 100, the sliding vane 3 reciprocates along the sliding vane groove 12, the end portion 42 of the sliding shoe always presses against the outer circumferential surface of the cam portion, and the head portion 41 of the sliding shoe and the sliding vane 3 rotate left and right relative to the sliding vane 3.

It can be understood that by providing the shoe 4 between the vane 3 and the cam portion, the contact stress between the vane 3 and the cam portion can be greatly reduced, the lubrication state is basically changed from the original boundary lubrication to hydrodynamic lubrication, the friction power consumption is effectively reduced, and the cold leakage between the vane 3 and the cam portion is also reduced.

The width of the end part 42 of the sliding shoe is larger than the thickness of the sliding sheet 3, namely, the width of the end part 42 of the sliding shoe, which is abutted against the cam part, is larger than the thickness of the sliding sheet 3, so that when the head part 41 of the sliding shoe rotates left and right relative to the sliding sheet 3 and rotates to a certain angle, the end part 42 of the sliding shoe is abutted against the first end of the sliding sheet 3, thereby ensuring the connection relation between the sliding shoe 4 and the sliding sheet 3 which can rotate relatively, ensuring that the matching area of the head part 41 of the sliding shoe and the sliding sheet 3 is small, ensuring that the friction area between the head part 41 of the sliding shoe and the sliding sheet 3 is small, namely the total working area of the head part 41 of the sliding shoe is.

When the sliding shoe head 41 rotates left and right relative to the sliding piece 3 to a certain moment, the current working area of the sliding shoe head 41 is large, the contact stress between the sliding shoe head 41 and the sliding piece 3 is small, an oil film is easily formed between the sliding shoe head 41 and the sliding piece 3, and further the friction force of a contact surface is reduced, and the abrasion is reduced.

Sliding friction is generated between the sliding shoe head part 41 and the sliding vane 3, sliding friction is generated between the sliding shoe end part 42 and the cam part, an oil film is easily formed between the pressing surface 43 and the outer circular surface, and enough oil film thickness can be maintained, so that the contact area between the sliding shoe 4 and the cam part is effectively reduced, the local stress of the sliding shoe end part 42 is prevented from being excessively large to cause structural damage, and the use safety of the sliding shoe 4 is improved. The structure of the sliding shoe 4 can improve the contact stress of the sliding vane 3 and the cam part, optimize the lubrication state between the sliding vane 3 and the cam part friction pair and greatly reduce the friction power consumption between the sliding vane 3 and the cam part friction pair.

In some embodiments, the width of the sliding shoe head 41 is smaller than the thickness of the sliding sheet 3, so that after the sliding shoe head 41 abuts against the first end of the sliding sheet 3, there is enough space in the sliding sheet groove 12 to avoid the sliding shoe head 41 rotating left and right relative to the sliding sheet 3, so that the sliding shoe head 41 can naturally rotate relative to the sliding sheet 3, and further, the friction force between the sliding shoe end 42 and the cam part is reduced, the abrasion of the sliding shoe 4 is reduced, and the service life is prolonged.

In some embodiments, one of the first end of the slider 3 and the shoe head 41 is provided with an arcuate slot 5 and the other comprises an arcuate hinge surface which is hingedly connected to the slot 5. Thus, the first end of the slider 3 is hinged to the slider head 41, so that the slider 3 can rotate left and right with respect to the slider head 41, and the slider 3 and the slider head 41 form a sliding friction pair, thereby reducing the frictional force between the slider 3 and the slider head 41 and reducing the wear of the slider head 41.

In some embodiments, the opening slot 5 and the hinge surface are circular arcs, the radius of curvature of the opening slot 5 is R1, and the radius of curvature of the hinge joint is R2, so that: R1/R2 is not less than 1.2, for example, R1/R2 is 1, R1/R2 is 1.1, or R1/R2 is 1.2, namely, the value of the curvature radius of the opening groove 5 is close to the value of the curvature radius of the hinge joint, so that the two have larger contact surfaces, the local stress between the sliding shoe head 41 and the sliding vane 3 is prevented from being too large, and the value of the curvature radius of the opening groove 5 is larger than that of the curvature radius of the hinge joint, so that the sliding shoe head 41 and the sliding vane 3 have enough space to realize relative rotation, the abrasion of the sliding shoe 4 is reduced, the use safety of the compressor is improved, and the long-term use is facilitated.

In some embodiments the arc of the open slot 5 is greater than 180 ° and the arc of the hinge is greater than 180 °, i.e. the arc of both the open slot 5 and the hinge is greater than 180 °. As shown in fig. 8-9, the part of the slipper head 41 with the hinge surface is located in the opening slot 5 of the sliding sheet 3, and the arc of the opening slot 5 covering the slipper head 41 is greater than 180 °, thereby preventing the part of the slipper head 41 with the hinge surface from falling out of the opening slot 5 of the sliding sheet 3; as shown in fig. 10-11, the shoe head 41 has an open slot 5, at least a portion of the first end of the slide 3 has a hinged surface, and the portion of the slide 3 having the hinged surface is located in the open slot 5, and the cover curvature of the open slot 5 to the portion of the slide 3 having the hinged surface is greater than 180 °, so that the portion of the slide 3 having the hinged surface can be prevented from falling out of the open slot 5 of the shoe head 41. Like this, through carrying out reasonable setting to the radian of open slot 5, articulated joint, can guarantee that gleitbretter 3 and smooth boots head 41 are articulated when linking to each other, can stabilize, reliably relative rotation, guarantee that the two has stable articulated relation, improve the stability of compressor, guarantee that the compressor can long-term safe handling.

In some embodiments, the slipper end 42 has a pressing surface 43, the pressing surface 43 is used for pressing the cam portion, wherein the pressing surface 43 is one of an arc-shaped surface or a plane, as shown in fig. 2, 4, 8-12 and 14-16, the pressing surface 43 is arc-shaped; as shown in fig. 3 and 5, the pressing surface 43 is a flat surface. Therefore, the friction force between the sliding shoe end part 42 and the cam part is sliding friction force, so that the friction force between the sliding shoe end part 42 and the cam part is greatly reduced, the reliability of the sliding shoe is greatly improved, the structure is simple, the cost is low, and the using effect is good.

In one embodiment, the abutting surface 43 is a circular arc surface, and the abutting surface 43 is inscribed in the outer circular surface of the cam surface, so that an oil film is easily formed between the abutting surface 43 and the outer circular surface, and a sufficient oil film thickness can be maintained, thereby effectively reducing the contact area between the shoe 4 and the cam portion. So that the pressing surface 43 is in sliding fit with the outer circumferential surface of the cam portion during the operation of the rotary compressor 100 to form a sliding friction pair, thereby reducing the friction loss of the shoe 4.

In some embodiments, the radius of curvature of the pressing surface 43 is R3, the radius of curvature of the outer circular surface is R4, and 0.8 ≦ R4/R3 < 1, such as R4/R3 ═ 0.85, R4/R3 ═ 0.9, or R4/R3 ═ 0.95, so that the radius of curvature of the pressing surface 43 is greater than that of the outer circular surface, so that when the pressing surface 43 presses the outer circular surface, the pressing surface 43 and the outer circular surface are in inward contact fit, and thus, the pressing surface 43 and the outer circular surface of the cam portion are in sliding fit, so as to form a sliding friction pair, and reduce the friction loss of the slipper 4. Moreover, the R4/R3 value should not be too small, so that too small a value tends to result in too small a contact area between the pressing surface 43 and the outer circumferential surface, and too large a contact stress may cause structural damage of the slipper 4 in severe cases. Therefore, the R4/R3 are arranged in a reasonable range, effective sliding friction between the two can be guaranteed, overlarge local contact stress is avoided, and the safety of the structure of the sliding shoe 4 is improved.

In some embodiments, the width of the end of the slipper end 42 opposite the outer circular surface is d, and the radius of the outer circular surface is R, satisfying: d/R is not less than 0.1 and not more than 0.65, for example, d/R is 0.2, or d/R is 0.4, or d/R is 0.6, so that the relative sizes of the end portion 42 of the sliding shoe and the outer circular surface are reasonably designed, an oil film is easily formed between the pressing surface 43 and the outer circular surface, and a sufficient oil film thickness can be maintained, thereby effectively reducing the contact area between the sliding shoe 4 and the cam portion, greatly improving the contact stress between the sliding vane 3 and the outer circular surface of the cam portion, improving the lubrication state between the sliding vane 3 and the friction pair of the cam portion, easily forming an oil film between the sliding shoe 4 and the sliding vane 3, and maintaining a sufficient oil film thickness, thereby effectively reducing the contact area between the sliding shoe 4 and the sliding vane 3, and further effectively reducing the friction loss of the friction pair.

In some embodiments, as shown in fig. 1, 6 and 8-9, the open slot 5 is provided at a first end of the slider 3, i.e. the open slot 5 is provided at an end of the slider 3 close to the shoe head 41, and the open slot 5 is open to the compression chamber 11 of the cylinder 1, as shown in fig. 1, 2-3 and 8-9, an end of the shoe head 41 facing the slider 3 is formed with an articulation surface. Wherein, the hinge face is the arc surface, and the radius of hinge face is r, and gleitbretter 3's thickness is T, satisfies: r/T is not less than 0.312 and not more than 0.88, such as r/T is 0.4, or r/T is 0.6, or r/T is 0.8, that is, the thickness of the sliding vane 3 is greater than the radius of the hinge surface, therefore, after the sliding vane 3 passes through the open slot 5 at one end of the sliding vane 4, enough space can be reserved to avoid the relative rotation of the sliding vane 4 relative to the sliding vane 3, so that when the rotary compressor 100 works, the sliding vane 4 can effectively rotate relative to the sliding vane 3 under the action of the cam part, so as to reduce the friction force, the size of the sliding shoe head part 41 is not too small relative to the thickness of the sliding vane 3, the contact stress between the sliding shoe part 41 and the sliding vane 3 is too large, so as to increase the abrasion of the sliding shoe 4, therefore, the r/T is designed in a reasonable range, so as to ensure that the relative rotation of the sliding shoe 4 and the sliding vane 3 can be realized, and to facilitate the local stress of the sliding shoe 4, the safety is improved, and the reliability is greatly improved.

In some embodiments, as shown in fig. 1, 2-3 and 8-9, the open slots 5 are symmetrically arranged along the thickness direction of the slider 3, so that when the slider 4 and the slider 3 rotate relatively, the angle of the slider 4 rotating towards both sides relative to the slider 3 is the same, and therefore, the contact stress between both sides of the slider 4 and the slider 3 during the rotation process is relatively balanced, thereby avoiding excessive local stress between the slider 3 and the slider 4 and improving the safety of the structure of the slider 4.

Of course, the opening groove 5 may also be asymmetrically arranged along the thickness direction of the sliding piece 3, so that the sliding shoe 4 and the sliding piece 3 can rotate relatively, and the flexibility of the structural design is high.

In one embodiment, the open slot 5 comprises two circular arcs respectively located at two sides of the axis of the sliding plate 3, and the two circular arcs have the same radius of curvature, the centers of the curvature circles coincide, and the central angles are different. It can be understood that when the cam mechanism 2 rotates in the compression chamber 11, the pressures on both sides of the cam portion are different, and therefore, the asymmetric arrangement of the open slot 5 can make the pressures on both sides of the slipper head portion 41 more balanced, avoid the pressure on one side from being too high, and improve the stability of the compressor.

In some embodiments, one end of the sliding shoe 4 and the sliding vane 3 form a sliding friction pair, the other end of the sliding shoe 4 has a pressing surface 43 that presses against the outer circumferential surface of the cam portion, the pressing surface 43 is provided with an oil groove 7, and 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 circumferential surface and forms an oil film, and a sufficient oil film thickness is maintained to lubricate the frictional contact between the pressing surface 43 and the outer circumferential surface, thereby reducing the wear of the sliding shoe 4 and the cam portion, making the structures 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 invention, one end of the sliding shoe 4 and the sliding vane 3 form a sliding friction pair, the abutting surface 43 at the other end of the sliding shoe 4 abuts against the outer circular surface of the cam part, the abutting surface 43 is provided with the oil groove 7, and the oil groove 7 is used for supplying lubricating oil to the contact surface of the sliding shoe 4 and the cam part, so that the abrasion of the sliding shoe 4 and the cam part is reduced, the safety of the rotary compressor 100 is improved, and the rotary compressor is convenient to use for a long time.

In some embodiments, as shown in fig. 18, the oil grooves 7 are distributed on the pressing surface 43 at intervals, so that each region where the pressing surface 43 and the outer circular surface are in contact with each other has lubricating oil, thereby enhancing the lubricating effect of the lubricating oil on the contact surface, ensuring that each position of the contact surface can be uniformly lubricated, improving the lubricating effect, further effectively reducing the wear of the slipper 4 and the cam portion, and improving the stability and reliability of the structure of the slipper 4 and the cam portion. Wherein, the oil groove 7 may be a cylindrical oil hole structure.

In some embodiments, the oil grooves 7 include multiple groups, the multiple groups of oil grooves 7 are distributed along the height direction of the sliding shoe 4 at intervals, each group of oil grooves 7 includes multiple groups, the multiple oil grooves 7 of each group are distributed along the width direction of the sliding shoe 4 at intervals, therefore, each position of the pressing surface 43 is provided with the oil grooves 7, the oil storage amount of the oil grooves 7 on the pressing surface 43 can be increased, the lubricating effect of lubricating oil on the contact surface is further enhanced, the lubricating effect is improved, the abrasion of the sliding shoe 4 and the cam part is reduced, the structure of the compressor is more stable, and the compressor is convenient to use safely for a long time.

In one embodiment, adjacent two sets of a plurality of oil grooves 7 are just to setting up along the direction of height of piston shoe 4 one by one, and like this, a plurality of oil grooves 7 of multiunit are all just to setting up along the direction of height of piston shoe 4, from this, can make the more regular, orderly that a plurality of oil grooves 7 on the face 43 of supporting distribute, and the distribution volume of the lubricating oil of face 43 each position of supporting is more even, and lubricated effect is more, and the piston shoe 4 processing of being convenient for simultaneously reduces the processing cost. Of course, the plurality of oil grooves 7 of two adjacent sets may be arranged to be offset in the height direction of the shoe 4, and the contact surface between the shoe 4 and the cam portion can be lubricated effectively.

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 abutting surface 43, as shown in fig. 13 and 17, and the oil groove 7 extends along the upper end shown in the figure to the lower end shown in the figure, so that the overall length of the oil groove 7 is large, and further, a sufficient amount of lubricating oil can be stored, and the contact surface of the shoe 4 and the cam portion can be ensured to be effectively lubricated, and the wear of the shoe 4 and the cam portion can be reduced.

In some embodiments, the extending direction of the oil groove 7 is parallel to the height direction of the slipper 4, as shown in fig. 13, the extending length of the oil groove 7 is the same as the height of the slipper 4, and as shown in fig. 12 and fig. 14-15, the distance between the oil groove 7 and both sides of the slipper 4 is the same, so that the lubricating oil in the oil groove 7 can flow to the contact surface of the slipper 4 and the cam part uniformly, and the lubricating effect of each area of the contact surface is ensured to be more uniform and sufficient.

In other embodiments, as shown in fig. 16-17, the oil groove 7 extends at an angle to the height direction of the slipper 4, the oil groove 7 extends along the upper end as shown in the figure to the lower end as shown in the figure, and the oil groove 7 extends for a length greater than the height of the slipper 4. Thus, sufficient lubricating oil can be stored in the oil groove 7, and when the cam mechanism 2 rotates, the lubricating oil in the oil groove 7 can sufficiently lubricate the contact surface, thereby improving the lubrication state between the shoe 4 and the cam portion. And further greatly reduce the friction power consumption between the sliding shoe 4 and the cam part, greatly improve the reliability and facilitate long-term use.

In some embodiments, the oil groove 7 has a cross section of one of a rectangular shape, a circular arc shape, and a trapezoidal shape. As shown in fig. 12 and 16, the oil groove 7 has a rectangular cross section; as shown in fig. 4, the cross section of the oil groove 7 is circular arc; as shown in fig. 15, the oil groove 7 has a trapezoidal cross section. Of course, the cross-sectional shape of the oil groove 7 is not limited to this, and may be other shapes, and it is sufficient to store lubricating oil to realize lubrication of the contact surface, and the oil groove 7 has high flexibility of structural arrangement, low restriction, and good practicability and flexibility.

In some embodiments, the depth of the oil groove 7 is H, satisfying: the lubricating oil can be stored in the oil groove 7 by 0 μm < H < 500 μm, for example, by H200 μm, or by H300 μm, or by H400 μm. It can be understood that the depth of the oil groove 7 should not be too large, which easily causes the structural strength of the slipper 4 to be low, and the problem of structural fracture of the slipper 4 is easily caused when the slipper 4 is stressed; the degree of depth of oil groove 7 should not the undersize, and the undersize easily leads to the volume of oil groove 7 to diminish, influences the oil storage capacity of oil groove 7, can not guarantee that the lubricating oil in the oil groove 7 can play fully lubricated effect to the contact surface. Therefore, the depth of the oil groove 7 is set within a reasonable range, so that the lubricating oil in the oil groove 7 can be ensured to effectively lubricate the contact surface, the friction loss of the sliding shoe 4 and the cam part is reduced, and the structural stability of the sliding shoe 4 is ensured.

The invention also provides a gas compression system.

According to the gas compression system provided with the rotary compressor 100 of any one of the embodiments, the rotary compressor 100 of the gas compression system has the advantages of greatly improved reliability, simple structure, low cost and better use effect, and is beneficial to improving the industry competitiveness of the gas compression system.

The invention also provides a refrigerating system.

According to the refrigeration system of the embodiment of the invention, the rotary compressor 100 of any one of the embodiments is provided, and the rotary compressor 100 of the refrigeration system has the advantages of better stability, simple structure, reliability, practicability and convenience for long-term use.

The invention also provides a heat pump system.

According to the heat pump system of the embodiment of the present invention, the rotary compressor 100 of any one of the embodiments is provided, and the rotary compressor 100 of the heat pump system has the advantages of high energy efficiency, low wear resistance, good stability, simple structure, low processing cost and long service life.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A rotary compressor, comprising:

the air cylinder is provided with a slide sheet groove;

the sliding sheet is arranged in the sliding sheet groove;

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

the sliding shoe is pressed against the outer circular surface of the cam portion, an arc-shaped open slot is formed in the first sliding piece and the first sliding shoe, the second sliding piece and the second sliding shoe comprise arc-shaped hinged joints, the hinged joints are hinged to the open slot, the second sliding piece and the second sliding shoe are connected with the hinged joints through necks, and the width of the necks is smaller than the width of the hinged joints.

2. The rotary compressor of claim 1, wherein the vane is provided with the open slot, the shoe includes a shoe head portion, a shoe neck portion, and a shoe end portion, which are sequentially connected, the shoe head portion abuts against the vane and forms a sliding friction pair with the vane, the shoe end portion abuts against an outer circumferential surface of the cam portion, the width of the shoe neck portion is smaller than that of the shoe head portion, the shoe neck portion is the neck portion, and the shoe head portion includes the hinge joint.

3. The rotary compressor of claim 1, wherein the shoe is provided with the open slot, the vane has a vane neck and a vane head, the vane head includes the hinge head, the vane neck is the neck, and a width of the vane neck is less than a width of the vane head.

4. The rotary compressor of claim 3, wherein the sliding shoe comprises a sliding shoe head portion, a sliding shoe neck portion and a sliding shoe end portion connected in sequence, the sliding shoe head portion is provided with the open slot and is hinged with the sliding shoe head portion, and the sliding shoe end portion is pressed against the outer circumferential surface of the cam portion.

5. The rotary compressor of claim 1, wherein the open groove and the hinge surface are both arc-shaped, the radius of curvature of the open groove is R1, the radius of curvature of the hinge head is R2, and the following are satisfied: R1/R2 is more than or equal to 1 and less than or equal to 1.2.

6. The rotary compressor of claim 1, wherein the arc degree of the open groove is greater than 180 °, and the arc degree of the hinge head is greater than 180 °.

7. The rotary compressor of any one of claims 1-6, wherein the shoe end has a pressing surface for pressing against the cam portion, the pressing surface being one of an arc-shaped surface or a flat surface.

8. The rotary compressor of claim 7, wherein the pressing surface is an arc surface, and the pressing surface is inscribed in the outer circular surface of the cam surface.

9. A gas compression system having a rotary compressor according to any one of claims 1 to 8.

10. A refrigerating system having a rotary compressor according to any one of claims 1 to 8.

11. A heat pump system characterized by having a rotary compressor according to any one of claims 1 to 8.

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