Resistance-reducing sliding vane for compressor and rotary compressor

Abstract

The present application relates to the technical field of compressor, provide a kind of compressor with drag reduction sliding vane and rotor compressor, compressor with drag reduction sliding vane includes: sliding vane main body, with first end and second end, first end is used to connect the sliding vane spring of rotor compressor;Matching portion, is set to the second end of sliding vane main body;The side of matching portion away from sliding vane main body is matching face;Roller, axis is parallel with the length direction of the second end, and at least one is arranged along the width direction of second end;Roller is rotatably connected to matching portion, and bottom side portion protrudes from matching face, for and the outer circumferential surface of rolling piston rolling contact cooperation.By setting matching portion and roller, sliding friction between sliding vane and rolling piston can be converted into rolling friction, to reduce working noise, while reducing the wear of sliding vane, prolong the service life of sliding vane, ensure the working performance of rotor compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a drag-reducing vane for a compressor and a rotary compressor. BACKGROUND

[0002] Rotary compressors are widely used in vapor compression refrigeration cycles and have the advantages of small size, light weight and simple structure.

[0003] In related technologies, the cylinder of a rotary compressor is divided into a suction chamber and a compression chamber by a vane. The upper part of the vane is connected to a spring, and the bottom end is in contact with a rolling piston. Under the action of the spring, the bottom end of the vane is always in elastic contact with the outer peripheral surface of the rolling piston, forming a contact seal. The rolling piston is driven by an eccentric shaft to roll along the inner wall of the cylinder, thereby repeatedly sucking and compressing gas.

[0004] However, during operation of the rotary compressor, the rolling piston and the vane are in continuous contact and friction, resulting in relatively large noise. In addition, after a long period of operation, the vane is prone to wear, leading to a problem of poor sealing between the vane and the rolling piston, which affects the performance of the compressor. SUMMARY

[0005] The present application provides a drag-reducing vane for a compressor and a rotary compressor to reduce the problem of relatively large noise and short service life of the vane caused by continuous contact and friction between the vane and the rolling piston in the prior art, thereby reducing noise, prolonging the service life of the vane, and ensuring the performance of the compressor.

[0006] The present application provides a drag-reducing vane for a compressor, comprising:

[0007] a vane body having a first end and a second end, the first end being used to connect a vane spring of a rotary compressor;

[0008] a fitting portion provided at the second end of the vane body and having the same length as the second end; one side of the fitting portion away from the vane body is a fitting surface;

[0009] a roller having an axis parallel to the length direction of the second end and at least one roller arranged along the width direction of the second end; the roller is rotationally connected to the fitting portion, and the bottom side of the roller protrudes from the fitting surface and is used to rollingly contact the outer peripheral surface of the rolling piston.

[0010] According to the drag-reducing vane for a compressor provided by the present application, the fitting surface is an arc surface concave inward and extends along the width direction of the second end, and is used to form partial covering of the outer peripheral surface of the rolling piston; and a plurality of rollers are arranged along the arc length direction of the fitting surface.

[0011] The resistance-reducing vane for compressor provided by the present application comprises a fitting part and a fitting surface, wherein an installation groove is arranged on the fitting part corresponding to the position of the roller, and at least one end of the installation groove is provided with an opening for inserting the roller; a notch is arranged on the fitting surface corresponding to the position of the installation groove, and the notch is communicated with the installation groove for exposing the bottom side of the roller.

[0012] The resistance-reducing vane for compressor provided by the present application comprises a fitting part and a fitting surface, wherein the one side of the fitting part away from the fitting surface is an arc surface, and the two ends of the fitting part along the arc length direction are circularly arc transitioned.

[0013] The resistance-reducing vane for compressor provided by the present application further comprises at least one oil groove, and the end of the oil groove is communicated with the fitting gap formed between the fitting surface and the outer circumferential surface of the rolling piston.

[0014] The resistance-reducing vane for compressor provided by the present application comprises an oil groove, wherein the oil groove comprises:

[0015] A first oil groove is arranged on the side surface of the vane body.

[0016] A second oil groove is arranged on the fitting part and communicated with the first oil groove, and the second oil groove has at least one branch, and the end of each branch penetrates the bottom side of the fitting part to form an oil outlet communicated with the fitting gap.

[0017] The resistance-reducing vane for compressor provided by the present application comprises an oil groove, wherein the first oil groove of the oil groove is a broken line type, and the second oil groove is an arc shape.

[0018] The present application further provides a rotary compressor comprising the resistance-reducing vane for compressor.

[0019] The rotary compressor provided by the present application further comprises a cylinder and a rolling piston.

[0020] The cylinder is provided with a sliding groove and a containing groove.

[0021] The sliding groove extends along the radial direction of the cylinder, and the vane body is slidably inserted into the sliding groove.

[0022] The containing groove is arranged at the end of the sliding groove and communicated with the sliding groove, and the fitting part is adapted to the containing groove for completely embedding the fitting part.

[0023] The roller is in rolling contact with the outer circumferential surface of the rolling piston.

[0024] The rotor compressor provided by the application is characterized in that the two end portions of the matching surface along the arc length direction are first areas, the portion between the two first areas is a second area, and the plurality of rollers are located in the second area, and the curvature radius of the first area is smaller than the curvature radius of the second area.

[0025] The compressor resistance-reducing vane and the rotor compressor provided by the application can convert the sliding friction force between the vane and the rolling piston into rolling friction force, thereby reducing the working noise, reducing the vane leakage and wear, prolonging the service life of the vane, and ensuring the working performance of the rotor compressor. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 Fig. 1 is a structural schematic diagram of a compressor resistance-reducing vane in an embodiment provided by the application;

[0028] Figure 2 Fig. 2 is a structural schematic diagram of a rotor compressor in an embodiment provided by the application;

[0029] Figure 3 Fig. 3 is a structural schematic diagram of a compressor resistance-reducing vane in another embodiment provided by the application;

[0030] Figure 4 Fig. 4 is a structural schematic diagram of a rotor compressor in another embodiment provided by the application.

[0031] Reference signs:

[0032] 1, cylinder; 10, sliding groove; 11, accommodating groove; 2, rolling piston; 3, vane main body; 4, matching portion; 40, mounting groove; 41, opening; 5, roller; 6, oil groove; 60, first oil groove; 61, second oil groove. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the application clearer, the following will combine the drawings in the application to clearly and completely describe the technical solutions in the application. Obviously, the described embodiments are some embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0034] In order to facilitate the understanding of the compressor with the drag-reducing vane and the rotor compressor provided by the present application, the application background thereof is first described. The gas cavity of the existing rotor compressor is generally separated into a suction cavity and a compression cavity by a vane. One end of the vane is connected with a spring, and the other end is elastically abutted against a rolling piston under the action of the spring to form a contact seal. During operation, the eccentric shaft drives the rolling piston to roll along the inner wall of the cylinder in a circumferential direction to realize the continuous suction and compression.

[0035] Since the vane and the rolling piston form a seal through tangential contact, the sealing surface between the compression cavity and the suction cavity is the tangent of the vane and the rolling piston, and the sealing surface is relatively narrow. There are problems of poor sealing effect and serious leakage. In addition, during operation, noise is easily generated due to the continuous contact and friction between the vane and the rolling piston. After long-term use, the vane is easily abraded, which further reduces the sealing performance between the vane and the rolling piston, affects the use performance of the compressor, and causes the problems of high and low pressure radial leakage of the refrigerant. Therefore, the present application provides a compressor with a drag-reducing vane and a rotor compressor to at least solve one of the above problems.

[0036] The compressor with the drag-reducing vane and the rotor compressor of the present application are described below. Figures 1-4 The compressor with the drag-reducing vane and the rotor compressor of the present application are described below.

[0037] Referring to Figure 1 and Figure 2 A compressor with a drag-reducing vane for cooperating with a cylinder 1 and a rolling piston 2 of a rotor compressor mainly comprises a vane body 3, a cooperating part 4 and a roller 5. The vane body 3 has a first end and a second end. The first end is mainly used for plug-in sliding cooperation with a sliding groove 10 on the cylinder 1 and is connected with a vane spring on the cylinder 1. The cooperating part 4 is arranged at the second end of the vane body 3 and is used for cooperating with the rolling piston 2 of the rotor compressor.

[0038] The vane body 3 is in the shape of a rectangle as a whole. The length of the second end, i.e. the width of the vane body 3, is adapted to the height of the rolling piston 2. The cooperating part 4 has the same length as the second end of the vane body 3, thereby ensuring the sealing performance of the vane. The side of the cooperating part 4 away from the vane body 3 is a cooperating surface.

[0039] The roller 5 is rotationally connected to the cooperating part 4 and is arranged along the length direction of the second end. The bottom side of the roller 5 protrudes from the cooperating surface. When the cooperating part 4 cooperates with the rolling piston 2, the axis of the roller 5 is parallel to the axis of the rolling piston 2. The part of the roller 5 protruding from the cooperating surface is in tangential contact with the outer circumferential surface of the rolling piston 2. Thus, when the rolling piston 2 rolls, the roller 5 can roll in contact with the outer circumferential surface of the rolling piston 2.

[0040] By setting the matching part 4 and the roller 5, the sliding friction between the sliding vane and the rolling piston 2 can be converted into rolling friction, thereby reducing the working noise, reducing the wear of the sliding vane, prolonging the service life of the sliding vane, and ensuring the working performance of the rotor compressor.

[0041] The matching surface is an arc surface concave inward, and extends along the width direction of the second end. The roller 5 is provided with a plurality of rollers arranged along the arc length direction of the matching surface. When the matching part 4 is matched with the rolling piston 2, the matching surface forms a partial covering to the outer peripheral surface of the rolling piston 2, and the portions of the plurality of rollers 5 protruding from the matching surface are in rolling contact with the outer peripheral surface of the rolling piston 2. Compared with the prior art, the tangential contact sealing between the end of the sliding vane and the rolling piston 2 is increased, the sealing surface is increased, and the sealing effect is improved. By contacting the rolling piston 2 with the plurality of rollers 5, a stepped sealing can be formed by the unevenness of the movement of the rollers 5 at different positions, thereby reducing the radial leakage of the compression chamber to the suction chamber in steps, and further ensuring the working performance of the rotor compressor.

[0042] Specifically, the specifications, number and arrangement of the rollers 5 can be selected according to actual needs, for example, they can be uniformly arranged or non-uniformly arranged.

[0043] In one embodiment, referring to Figure 1 , the rollers 5 are arranged in three, one of which is located on the extension line of the first end and the second end, and the other two are symmetrically arranged on both sides of the extension line of the first end and the second end.

[0044] In another embodiment, referring to Figure 3 , the rollers 5 are arranged in five, one of which is located on the extension line of the first end and the second end, and the other four are symmetrically arranged on both sides of the extension line of the first end and the second end.

[0045] The matching part 4 is provided with a mounting groove 40 corresponding to the position of the roller 5, and at least one end of the mounting groove 40 is provided with an opening for the roller 5 to pass in; the matching surface is provided with an opening 41 corresponding to the position of the mounting groove 40, and when the roller 5 is inserted into the mounting groove 40, the bottom side of the roller 5 is exposed from the opening 41, so that the bottom side of the roller 5 protrudes from the matching surface, and the outer peripheral surface of the rolling piston 2 is matched. When installing the roller 5, only the roller 5 needs to be inserted into the mounting groove 40, without the need for additional connecting parts, thereby improving the convenience of assembly.

[0046] The oil groove 6 is arranged on at least one side of the friction-reducing vane for lubricating the matching part of the roller 5 and the rolling piston 2. Due to the existence of the roller 5, a matching gap is formed between the matching surface of the matching part 4 and the outer circumferential surface of the rolling piston 2; the first end of the oil groove 6 is close to the first end, and the last end is communicated with the matching gap; in the actual operation of the rotor compressor, the oil injection port can be arranged at the position close to the first end of the vane main body 3, the lubricating oil enters the matching gap through the oil groove 6 to lubricate the roller 5, further reduce the friction, thereby reducing the working noise and the wear of the vane; in addition, the lubricating oil can also form an oil seal at the matching part of the roller 5 and the rolling piston 2, further improving the sealing performance and ensuring the working performance of the rotor compressor.

[0047] Specifically, the oil groove 6 includes a first oil groove 60 and a second oil groove 61, wherein the first oil groove 60 is arranged on at least one side of the vane main body 3; during the reciprocating sliding of the vane main body 3 in the sliding groove 10, the lubricating oil in the oil groove 6 is thrown out and covers the surface of the vane main body 3, thereby lubricating the vane main body 3 and reducing the friction between the vane main body 3 and the inner wall of the sliding groove 10.

[0048] The second oil groove 61 is arranged on the matching part 4 and communicated with the first oil groove 60, and the second oil groove 61 has at least one branch, and the last end of each branch penetrates the bottom side of the matching part 4, thereby forming an oil outlet at the matching gap, and the lubricating oil flows into the matching gap through the oil outlet to lubricate the roller 5.

[0049] Specifically, the first oil groove 60 is in a zigzag shape, and the zigzag-shaped first oil groove 60 can effectively increase the coverage area of the oil film and improve the lubricating effect.

[0050] Specifically, the second oil groove 61 is in an arc shape, and has two open ends, and the two open ends of the second oil groove 61 penetrate the bottom side of the matching part 4 to form two oil outlets.

[0051] Specifically, the initial end and the inflection point of the oil groove 6 are arranged as a circular arc, which is convenient for processing.

[0052] The rotor compressor provided by the application is described below, and the rotor compressor described below can be correspondingly referred to the friction-reducing vane of the compressor described above.

[0053] A rotor compressor includes a rolling piston 2, a cylinder 1, and the friction-reducing vane of the compressor described above.

[0054] The rolling piston 2 is arranged in the cylinder 1, and one side of the rolling piston 2 is tangent to the inner wall of the cylinder 1, thereby forming a crescent-shaped gas cavity together with the inner wall of the cylinder 1; the friction-reducing vane of the compressor divides the gas cavity into two parts, i.e., a suction cavity and a compression cavity. The rolling piston 2 is driven by the eccentric shaft to roll along the inner wall of the cylinder 1, thereby completing the suction and compression work repeatedly.

[0055] The inner wall of the cylinder 1 is provided with a sliding groove 10 extending in the radial direction thereof, the bottom of the sliding groove 10 is provided with a sliding spring, the first end of the sliding piece body 3 is slidably inserted into the sliding groove 10 and connected with the sliding spring; the matching part 4 partially covers the outer circumferential surface of the rolling piston 2, under the pushing action of the sliding spring, the part of the rolling pin 5 protruding from the matching surface is in rolling contact with the outer circumferential surface of the rolling piston 2 and forms a contact seal.

[0056] The inner wall of the cylinder 1 is provided with a sliding groove 10 extending in the radial direction thereof, the bottom of the sliding groove 10 is provided with a sliding spring, the first end of the sliding piece body 3 is slidably inserted into the sliding groove 10 and connected with the sliding spring; the matching part 4 partially covers the outer circumferential surface of the rolling piston 2, under the pushing action of the sliding spring, the part of the rolling pin 5 protruding from the matching surface is in rolling contact with the outer circumferential surface of the rolling piston 2 and forms a contact seal.

[0057] In one embodiment, referring to Figure 1 and Figure 2 , the two ends of the matching part 4 in the arc length direction are polygonal.

[0058] In another embodiment, referring to Figure 3 and Figure 4 , the side of the matching part 4 away from the matching surface is arc-shaped, and the two ends of the matching part 4 in the arc length direction are circularly arc-shaped.

[0059] In this way, the corners of the matching part 4 can be eliminated, ensuring that the matching part 4 can be completely retracted into the accommodating groove 11 more smoothly, reducing the occurrence of jamming problems.

[0060] In addition, when the two ends of the matching part 4 in the arc length direction have polygonal end surfaces, the end surfaces thereof cannot well fit the inner wall of the accommodating groove 11, the matching clearance is large, and the gas in the gas cavity is easy to enter the matching clearance, thereby reducing the volumetric efficiency of the rotor compressor. By setting the two ends of the matching part 4 in the arc length direction to be arc-shaped, the fit of the accommodating groove 11 and the matching part 4 can be increased, the matching clearance can be reduced, and the working efficiency of the rotor compressor can be ensured.

[0061] Referring to Figure 1 and Figure 3 , the two ends of the matching surface in the arc length direction are first regions, as shown in Figure 1 and Figure 3 , the part between the two first regions is a second region, the plurality of rolling pins 5 are located in the second region, and the curvature radius of the first region is smaller than that of the second region. In this way, the first region can be closer to the rolling piston 2, thereby minimizing the empty volume of the rotor compressor and further improving the performance of the compressor.

[0062] The new point of the present application is that the sliding friction between the sliding vane and the rolling piston 2 can be converted into rolling friction by setting the matching part 4 and the roller 5, thereby reducing the working noise, reducing the wear of the sliding vane, prolonging the service life of the sliding vane, and ensuring the working performance of the rotor compressor.

[0063] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A drag-reducing vane for a compressor, characterized in that, include: The vane body (3) has a first end and a second end, the first end being used to connect the vane spring of the rotor compressor; A mating part (4) is provided at the second end of the slide body (3); the side of the mating part (4) facing away from the slide body (3) is the mating surface; The roller (5) has an axis parallel to the length direction of the second end and at least one roller is provided along the width direction of the second end; the roller (5) is rotatably connected to the mating part (4) and the bottom part protrudes from the mating surface for rolling contact with the outer peripheral surface of the rolling piston (2); The mating surface is a concave arc surface and extends along the width direction of the second end to partially cover the outer peripheral surface of the rolling piston (2); multiple rollers (5) are arranged along the arc length direction of the mating surface. It also includes at least one oil groove (6), the end of which is connected to the mating gap formed between the mating surface and the outer peripheral surface of the rolling piston (2); The oil tank (6) includes: The first oil groove (60) is provided on the side of the slide body (3); The second oil groove (61) is disposed in the mating part (4) and communicates with the first oil groove (60); the second oil groove (61) has at least one branch, and the end of each branch penetrates the bottom side of the mating part (4) to form an oil outlet communicating with the mating gap.

2. The drag-reducing vane for a compressor according to claim 1, characterized in that, The mating part (4) is provided with a mounting groove (40) corresponding to the position of the roller (5), and at least one end of the mounting groove (40) is provided with an opening for the roller (5) to be inserted; the mating surface is provided with a notch (41) corresponding to the position of the mounting groove (40), and the notch (41) communicates with the mounting groove (40) for the bottom side of the roller (5) to be exposed.

3. The drag-reducing vane for a compressor according to claim 1, characterized in that, The side of the mating part (4) facing away from the mating surface is an arc surface, and the two ends of the mating part (4) are rounded along the arc length direction.

4. The drag-reducing vane for a compressor according to claim 1, characterized in that, The first oil groove (60) of the oil groove (6) is a zigzag shape, and the second oil groove (61) is an arc shape.

5. A rotary compressor, characterized in that, Includes the drag-reducing vane for compressors as described in any one of claims 1-4.

6. The rotary compressor according to claim 5, characterized in that, Also includes: Cylinder (1) and rolling piston (2); The cylinder (1) is provided with a sliding groove (10) and a receiving groove (11); The slide groove (10) extends radially along the cylinder (1), and the slide body (3) is slidably inserted into the slide groove (10); The receiving groove (11) is disposed at the end of the slide groove (10) and communicates with the slide groove (10). The mating part (4) is adapted to the receiving groove (11) for the mating part (4) to be fully embedded. The roller (5) makes rolling contact with the outer peripheral surface of the rolling piston (2).

7. The rotary compressor according to claim 5, characterized in that, The two ends of the mating surface along the arc length direction are the first region, and the part located between the two first regions is the second region. The multiple rollers (5) are all located in the second region, and the radius of curvature of the first region is smaller than the radius of curvature of the second region.

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