CN112324662A

CN112324662A - Compressor

Info

Publication number: CN112324662A
Application number: CN202011211387.7A
Authority: CN
Inventors: 魏会军; 周瑜; 阙沛祯; 聂军; 王浩; 崔雪梅
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-02-05
Anticipated expiration: 2040-11-03
Also published as: CN112324662B

Abstract

The invention provides a compressor, which comprises an air cylinder, a roller and a slide plate group, wherein the roller is rotatably arranged in a cavity of the air cylinder; the sliding vane group is slidably arranged in a sliding vane groove of the cylinder and comprises a low-pressure side sliding vane and a high-pressure side sliding vane, an air suction cavity is formed in the area among the low-pressure side sliding vane, the roller and the inner wall of the cylinder, and a compression cavity is formed in the area among the high-pressure side sliding vane, the roller and the inner wall of the cylinder; wherein, the low pressure side gleitbretter has the spacing groove, and the spacing groove has the first lateral wall that sets up along the axial in slide groove and the second lateral wall that radially sets up along the slide groove, and the spacing cooperation of lateral wall and the first lateral wall of high-pressure side gleitbretter, the spacing cooperation of tail end and the second lateral wall of high-pressure side gleitbretter. By adopting the scheme, the sliding vane separation problem can be improved, leakage is reduced, and the performance of the compressor is improved.

Description

Compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor.

Background

The existing rotary compressor generally adopts a single sliding vane, the end part of the sliding vane is tightly pressed on the outer surface of a roller by means of the pushing pressure of a spring, the sliding vane and the roller divide a cavity in a cylinder into a suction cavity and a compression cavity, the roller is driven to move by the rotation of a crankshaft, the sliding vane makes reciprocating motion, and the cylinder repeatedly performs the actions of suction, compression and discharge of gas, so that the basic functions of the compressor are completed. However, because the sliding vane is in line contact with the outer circle of the roller, the top end of the sliding vane is easy to wear under the spring force and the pressure difference force, and particularly, the wear is more obvious under the condition that the running rotating speed of the compressor is higher and higher.

In order to solve the above problems, a compressor with a double sliding vane is provided, and the double sliding vane is a good choice for compensating the defect of the single sliding vane. However, the double-sliding-vane compressor has the risk that the sliding vane and the roller are separated in the high-frequency operation of the low-pressure side sliding vane suction stage and the exhaust end stage, and the high risk of separation exists in the high-pressure side exhaust end stage. The slip sheet takes off and can bring the abnormal sound, and increase the volume of revealing of working chamber when breaking away from, influence the performance of compressor. Therefore, the double-sliding-piece arrangement is an effective technical means for improving the stress of the sliding piece, but increases the risk of the sliding piece being separated.

Disclosure of Invention

The invention provides a compressor, which aims to solve the problem of slip sheet separation, reduce leakage and improve the performance of the compressor.

In order to achieve the above object, the present invention provides a compressor comprising: a cylinder; the roller is rotatably arranged in the cavity of the cylinder; the sliding vane group is slidably arranged in a sliding vane groove of the cylinder and comprises a low-pressure side sliding vane and a high-pressure side sliding vane, a suction cavity is formed in an area among the low-pressure side sliding vane, the roller and the inner wall of the cylinder, and a compression cavity is formed in an area among the high-pressure side sliding vane, the roller and the inner wall of the cylinder; wherein, the low pressure side sliding sheet has a spacing groove, the spacing groove has the edge the first side wall that the axial of sliding sheet groove set up with follow the second lateral wall of the radial setting in sliding sheet groove, the lateral wall of high pressure side sliding sheet with the spacing cooperation of first lateral wall, the tail end of high pressure side sliding sheet with the spacing cooperation of second lateral wall.

Further, the low-pressure side sliding piece comprises a body and a limiting piece, the body extends along the axial direction of the sliding piece groove, the limiting piece is arranged on the body in a protruding mode, the body and the limiting piece surround and form the limiting groove, the first side wall is located on the body, and the second side wall is located on the limiting piece.

Further, the axial dimension of the low-pressure side sliding piece along the sliding piece groove is Ld, the axial dimension of the high-pressure side sliding piece along the sliding piece groove is Lg, and the distance between the second side wall and the tail end of the low-pressure side sliding piece is L1, wherein L1 is not less than Ld-Lg.

Further, L1 ═ Ld-Lg.

Furthermore, the shortest length of the high-pressure side sliding piece extending into the sliding piece groove is Ls, and Ls is more than or equal to 5mm and less than or equal to 8 mm.

Furthermore, the radial dimension of the limiting groove along the sliding sheet groove is h, the radial dimension of the high-pressure side sliding sheet along the sliding sheet groove is hg, and h is less than hg.

Furthermore, 1/2hg is less than or equal to h.

Further, the compressor further includes: the elastic piece, the elastic piece with the tail end butt of low pressure side gleitbretter.

Further, the weight of the low-pressure side vane is larger than that of the high-pressure side vane.

Further, the high pressure side gleitbretter includes first gleitbretter and second gleitbretter, wherein, first gleitbretter with the spacing groove cooperation, first gleitbretter has the second spacing groove, the lateral wall of second gleitbretter with the spacing cooperation of the lateral wall of second spacing groove, the tail end of second gleitbretter with the spacing cooperation of the diapire of second spacing groove.

The technical scheme of the invention is applied to provide a compressor, which comprises an air cylinder, a roller and a slide plate group, wherein the roller is rotatably arranged in a cavity of the air cylinder; the sliding vane group is slidably arranged in a sliding vane groove of the cylinder and comprises a low-pressure side sliding vane and a high-pressure side sliding vane, an air suction cavity is formed in the area among the low-pressure side sliding vane, the roller and the inner wall of the cylinder, and a compression cavity is formed in the area among the high-pressure side sliding vane, the roller and the inner wall of the cylinder; wherein, the low pressure side gleitbretter has the spacing groove, and the spacing groove has the first lateral wall that sets up along the axial in slide groove and the second lateral wall that radially sets up along the slide groove, and the spacing cooperation of lateral wall and the first lateral wall of high-pressure side gleitbretter, the spacing cooperation of tail end and the second lateral wall of high-pressure side gleitbretter. By adopting the scheme, in the air suction stage, the two sliding pieces are in contact with the outer circle of the roller, the arrangement of the limiting groove effectively increases the weight of the sliding piece at the low-pressure side and reduces the contact area with the sliding piece at the high-pressure side, so that the mutual friction force of the two sliding pieces is increased, the resultant force of the two sliding pieces is increased, and the two sliding pieces can be in close contact with the outer circle of the roller; in the exhaust stage, the cooperation setting of spacing groove and high pressure side gleitbretter makes the low pressure side gleitbretter not contact with the roller excircle, the top and the roller excircle contact of high pressure side gleitbretter, low pressure side gleitbretter and high pressure side gleitbretter simultaneous movement, and the gas pressure that two gleitbretters received as a whole increases along with the increase of gleitbretter group thickness this moment, has increased the effort of high pressure side gleitbretter and roller excircle, ensures that the high pressure side gleitbretter does not break away from. Therefore, the scheme can improve the problem of sliding vane separation, reduce leakage and improve the performance of the compressor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view illustrating a compressor provided in an embodiment of the present invention;

FIG. 2 shows a schematic diagram of the configuration of the slide plate set of FIG. 1;

FIG. 3 is a force diagram of the vane set of the compressor of FIG. 1 during the suction phase;

FIG. 4 is a schematic diagram showing the relative positions of a low pressure side vane and a high pressure side vane of the compressor of FIG. 1 at a 0 ° corner position;

FIG. 5 is a schematic diagram showing the relative positions of a low-side vane and a high-side vane of the compressor of FIG. 1 at a 90 ° corner position;

FIG. 6 is a schematic diagram showing the relative positions of a low pressure side vane and a high pressure side vane of the compressor of FIG. 1 at a 120 ° corner position;

FIG. 7 is a schematic illustrating the relative positions of a low-side vane and a high-side vane of the compressor of FIG. 1 at a 180 ° corner position;

FIG. 8 is a schematic illustrating the relative positions of the low side vane and the high side vane of the compressor of FIG. 1 at a 270 ° corner position;

FIG. 9 is a schematic illustrating the relative positions of a low-side vane and a high-side vane of the compressor of FIG. 1 at a 330 ° corner position;

FIG. 10 shows the distance (L-Lg) between the tail of the low-pressure side vane and the tail of the high-pressure side vane in the compressor of FIG. 1 as a function of the rotation angle;

fig. 11 shows a moving distance variation law of the low-pressure side vane and the high-pressure side vane with a rotation angle in the compressor of fig. 1.

Wherein the figures include the following reference numerals:

10. a cylinder; 11. a slide groove; 20. a roller; 30. a low pressure side slip sheet; 31. a limiting groove; 33. a body; 34. a limiting member; 40. high pressure side slip sheet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 11, an embodiment of the present invention provides a compressor including: a cylinder 10; a roller 20 rotatably disposed within the cavity of the cylinder 10; a slide set slidably disposed in the slide groove 11 of the cylinder 10, the slide set including a low-pressure side slide 30 and a high-pressure side slide 40, a suction chamber being formed in a region between the low-pressure side slide 30, the roller 20 and an inner wall of the cylinder 10, and a compression chamber being formed in a region between the high-pressure side slide 40, the roller 20 and the inner wall of the cylinder 10; wherein, low pressure side gleitbretter 30 has spacing groove 31, and spacing groove 31 has the first lateral wall that sets up along the axial of gleitbretter groove 11 and the second lateral wall that radially sets up along the gleitbretter groove 11, and the spacing cooperation of lateral wall and the first lateral wall of high pressure side gleitbretter 40, the spacing cooperation of tail end and the second lateral wall of high pressure side gleitbretter 40.

By adopting the scheme, in the air suction stage, the low-pressure side sliding piece 30 and the high-pressure side sliding piece 40 are both contacted with the excircle of the roller 20, the weight of the low-pressure side sliding piece 30 is increased and the contact area with the high-pressure side sliding piece 40 is reduced due to the arrangement of the limiting groove 31, so that the mutual friction force of the two sliding pieces is increased, the resultant force of the two sliding pieces is increased, and both the two sliding pieces can be tightly contacted with the excircle of the roller 20; in the exhaust stage, the limit groove 31 is matched with the high-pressure side sliding sheet 40, so that the low-pressure side sliding sheet 30 is not contacted with the outer circle of the roller 20, the top end of the high-pressure side sliding sheet 40 is contacted with the outer circle of the roller 20, the low-pressure side sliding sheet 30 and the high-pressure side sliding sheet 40 move simultaneously, the gas pressure borne by the two sliding sheets as a whole is increased along with the increase of the thickness of the sliding sheet group, the acting force of the high-pressure side sliding sheet 40 and the outer circle of the roller 20 is increased, and the high-pressure side sliding sheet 40. Therefore, the scheme can improve the slip sheet separation problem, reduce leakage and improve the performance of the compressor.

In addition, the length of the high-pressure side sliding piece 40 is effectively reduced by the limiting groove 31, the contact area between the sliding piece set and the sliding piece groove 11 is reduced, the weight of the high-pressure side sliding piece 40 is reduced and the contact area is reduced under the condition that the pressure difference is not changed, and the friction power between the sliding piece set and the sliding piece groove 11 is effectively reduced.

As shown in fig. 2, the low-pressure-side sliding vane 30 includes a main body 33 and a limiting member 34, the main body 33 extends along the axial direction of the sliding vane slot 11, the limiting member 34 is disposed on the main body 33 in a protruding manner, the main body 33 and the limiting member 34 surround to form the limiting slot 31, a first side wall is located on the main body 33, and a second side wall is located on the limiting member 34. This facilitates formation of the stopper groove 31 and makes the low-pressure side vane 30 large in size and weight.

In the present embodiment, the dimension of the low pressure side vane 30 in the axial direction of the vane groove 11 is Ld, the dimension of the high pressure side vane 40 in the axial direction of the vane groove 11 is Lg, and the distance between the second side wall and the trailing end of the low pressure side vane 30 is L1, where L1 is ≤ Ld-Lg. L1 may also be understood as the axial dimension of the limiter 34 along the slide slot 11. L1 is equal to or greater than L-Lg at the relative position where the low-pressure-side vane 30 and the high-pressure-side vane 40 simultaneously contact the outer circumference of the roller 20 at the discharge start angle. Considering the applicability of the operating mode, L1 ═ Ld-Lg is preferable.

When the angle of rotation is 0 °, 180 ° or 360 °, L1 ═ Ld — Lg ═ L-Lg. When the compressor is operated, the penetration distance of the high-pressure side sliding vane 40 is always larger than that of the low-pressure side sliding vane 30 when the rotation angle is between 0 and 180 degrees, so that the penetration distance (L-Lg) > L1 (see figure 11) is larger than that of the low-pressure side sliding vane 30, the high-pressure side sliding vane 40 is lightened due to the short design weight of Lg, the friction force Fm2 exerted by the low-pressure side sliding vane 30 is reduced, the longitudinal resultant force of the high-pressure side sliding vane 40 pressing the roller 20 is increased, and the high-pressure side sliding vane. The 0 ° rotation angle is the position where the center of the roller 20 is located on the center line of the slide groove 11, and the roller 20 presses the slide set into the slide groove 11. The 180-degree corner is the longest position of the slide plate group extending into the cavity of the cylinder.

When the sliding vane rotates between the rotation angles of 180-360 degrees, (L-Lg) < L1 (see figure 10), the low-pressure side sliding vane 30 is separated from the excircle of the roller 20 under the action of the longitudinal force of the high-pressure side sliding vane 40 departing from the excircle of the roller 20, the high-pressure side sliding vane 40 and the low-pressure side sliding vane 30 move integrally, namely the arc-shaped center of the existing sliding vane deviates towards the compression cavity side relative to the central line of the sliding vane in the length direction, and the stable operation of the sliding vane in the exhaust process and the effective contact with the excircle of the roller can be effectively ensured.

In the embodiment, the shortest length of the high-pressure side sliding piece 40 extending into the sliding piece groove 11 is Ls, and Ls is more than or equal to 5mm and less than or equal to 8 mm. The shortest length of the high-pressure side sliding piece 40 extending into the sliding piece slot 11 is the matching length of the high-pressure side sliding piece 40 and the sliding piece slot 11 when the roller 20 rotates at an angle of 180 degrees. Preferably Ls is 5 mm.

As shown in fig. 3, the limiting groove 31 is transversely extended, so that in the air suction stage, the tail cross-sectional area (the width is increased from hd to hd + h) of the low-pressure side sliding piece 30 is increased, the weight of the low-pressure side sliding piece 30 is increased, the contact area with the high-pressure side sliding piece 40 is reduced, the movement of the low-pressure side sliding piece 30 relative to the high-pressure side sliding piece 40 generates a friction force Fm1 for longitudinally pressing the roller 20 to be increased, the thrust force to the roller 20 is increased, and the low-pressure side sliding piece 30 is prevented from being separated; the arrangement of the high-pressure side sliding piece 40 effectively reduces the lateral contact area between the high-pressure side sliding piece 40 and the low-pressure side sliding piece 30, so that the thrust F (Fs 2-Fm 2) of the high-pressure side sliding piece 40 to the end of the roller 20 is increased, and the risk of separation of the high-pressure side sliding piece 40 is effectively reduced. The length of the high-pressure side sliding sheet 40 is set, so that the high-pressure side sliding sheet is matched with the limiting groove 31, the contact area with the sliding sheet groove 11 is effectively reduced, abrasion is reduced, friction work is reduced, and the performance of the compressor is improved. In fig. 3, Fs1 is a force applied by the gas to the low-pressure side vane 30, and Fs2 is a force applied by the gas to the high-pressure side vane 40.

In the present embodiment, the dimension of the stopper groove 31 in the radial direction of the vane groove 11 is h, and the dimension of the high-pressure side vane 40 in the radial direction of the vane groove 11 is hg, where h < hg. Furthermore, 1/2hg is less than or equal to h.

The width h of the limiting groove 31 influences the stress area of the tail end of the low-pressure side sliding sheet 30, and the larger the h is, the better the h is; but also influence the contact area of the side surfaces of the two sliding vanes, the smaller the contact area is, the smaller the friction loss is, so the design of h < hg can ensure that the limiting piece 34 is not in contact with the side surfaces of the sliding vane slot 11, and the friction loss is reduced.

In this embodiment, the compressor further includes: the elastic member abuts against the rear end of the low-pressure side sliding piece 30. The elastic member is used to apply an elastic force to the low pressure side vane 30. An elastic piece is arranged at the end of the low-pressure side sliding sheet 30 and used for ensuring that the low-pressure side sliding sheet 30 is contacted with the outer circle of the roller 20 when the compressor is started, and the suction and exhaust pressure difference is normally established. At the beginning of the start, the high-pressure side sliding piece 40 may not contact with the outer circle of the roller 20, and the low-pressure side sliding piece 30 contacts with the outer circle.

In the present embodiment, the weight of the low-pressure side vane 30 is greater than that of the high-pressure side vane 40. Like this at the stage of breathing in, low pressure side gleitbretter 30 and high pressure side gleitbretter 40 all with roller 20 excircle contact, and then increased the mutual frictional force of two gleitbretters, the resultant force of two gleitbretters increases, avoids the gleitbretter to break away from.

In other embodiments, the set of slides may include more than two slides. For example, the high-pressure-side sliding piece 40 includes a first sliding piece and a second sliding piece, wherein the first sliding piece is matched with the limit groove 31, the first sliding piece has a second limit groove 31, the side wall of the second sliding piece is matched with the side wall of the second limit groove 31 in a limit way, and the tail end of the second sliding piece is matched with the bottom wall of the second limit groove 31 in a limit way. That is, in this aspect, the structure and the fitting relationship of the first vane and the second vane are similar to those of the high-pressure side vane 40 as a whole and the low-pressure side vane 30.

Through this scheme, improved the gleitbretter and broken away from the problem, reduce and reveal, improve compressor performance to can reduce the horizontal atress of gleitbretter, effectively reduce the friction work in gleitbretter and slide groove, improve compressor performance.

This scheme is through setting up spacing groove 31 at low pressure side gleitbretter 30, cooperates with high pressure side gleitbretter 40, combines two gleitbretters to carry out the structure setting along with the law of corner operation to the spacing groove, and two gleitbretters move (two gleitbretters all contact with the roller excircle) when reaching the state of breathing in, and during exhaust state, single gleitbretter moves (the side gleitbretter of breathing in does not contact with the roller excircle). In the switching process of the switching mode, the problem of separation of the sliding sheet is effectively solved, the stress of the sliding sheet is reduced, leakage is reduced, the loss of friction work is reduced, and the running reliability and performance of the compressor are improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressor, comprising:

a cylinder (10);

a roller (20) rotatably disposed within the cavity of the cylinder (10);

the sliding vane group is slidably arranged in a sliding vane groove (11) of the cylinder (10) and comprises a low-pressure side sliding vane (30) and a high-pressure side sliding vane (40), a suction cavity is formed in an area among the low-pressure side sliding vane (30), the roller (20) and the inner wall of the cylinder (10), and a compression cavity is formed in an area among the high-pressure side sliding vane (40), the roller (20) and the inner wall of the cylinder (10);

wherein, low pressure side gleitbretter (30) have spacing groove (31), spacing groove (31) have along the first lateral wall of the axial setting of gleitbretter groove (11) and follow the second lateral wall of the radial setting of gleitbretter groove (11), the lateral wall of high pressure side gleitbretter (40) with the spacing cooperation of first lateral wall, the tail end of high pressure side gleitbretter (40) with the spacing cooperation of second lateral wall.

2. The compressor of claim 1, wherein the low-pressure-side vane (30) includes a body (33) and a retainer (34), the body (33) extends in an axial direction of the vane groove (11), the retainer (34) is protrudingly provided on the body (33), the body (33) and the retainer (34) surround to form the retainer groove (31), the first sidewall is located on the body (33), and the second sidewall is located on the retainer (34).

3. The compressor of claim 1, wherein the low pressure side vane (30) has a dimension Ld in an axial direction of the vane groove (11), the high pressure side vane (40) has a dimension Lg in the axial direction of the vane groove (11), and a distance L1 between the second side wall and a trailing end of the low pressure side vane (30), wherein L1 ≦ Ld-Lg.

4. The compressor of claim 3, wherein L1 ═ Ld-Lg.

5. The compressor as claimed in claim 1, wherein the shortest length of the high pressure side vane (40) extending into the vane groove (11) is Ls, and Ls is 5mm or more and 8mm or less.

6. The compressor of claim 1, wherein the dimension of the stopper groove (31) in the radial direction of the vane groove (11) is h, and the dimension of the high pressure side vane (40) in the radial direction of the vane groove (11) is hg, wherein h < hg.

7. The compressor of claim 6, wherein 1/2hg ≦ h.

8. The compressor of any one of claims 1 to 7, further comprising:

and the elastic piece is abutted with the tail end of the low-pressure side sliding piece (30).

9. The compressor of claim 1, wherein the weight of the low-pressure side vane (30) is greater than the weight of the high-pressure side vane (40).

10. The compressor of claim 1, wherein the high pressure side vane (40) comprises a first vane and a second vane, wherein the first vane is engaged with the limit groove (31), the first vane has a second limit groove (31), a side wall of the second vane is engaged with a side wall of the second limit groove (31), and a tail end of the second vane is engaged with a bottom wall of the second limit groove (31).