Bearing and rotary compressor

Abstract

The utility model discloses a bearing and a rotary compressor, and relates to the technical field of compressors, the bearing is provided with an exhaust hole, a fixing part and a mounting groove, the exhaust hole and the fixing part are both arranged in the mounting groove, and the exhaust hole is obliquely arranged in the direction far away from the fixing part; the groove wall of the mounting groove is provided with a slope part, the slope part is arranged on the side, away from the fixing part, of the exhaust hole, and the slope part is obliquely arranged in the direction away from the fixing part. According to the technical scheme provided by the utility model, the gas flowing resistance can be reduced, the overcompression loss is reduced, and the compression performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a bearing and a rotary compressor. Background Art

[0002] At present, when the cylinder in a traditional rotary compressor is exhausted, a high-speed airflow enters the exhaust port of the cylinder from the cylinder exhaust chamber, and then enters the exhaust hole of the bearing. During the flow of the airflow, the flow direction of the airflow turns approximately 90°, which greatly increases the gas flow resistance, increases the over-compression loss, and reduces the working performance of the compressor. Utility Model Content

[0003] The main purpose of the utility model is to provide a bearing and a rotary compressor, aiming to improve the problem of large resistance of the rotary compressor during exhaust.

[0004] To achieve the above-mentioned purpose, the utility model provides a bearing, which is provided with an exhaust hole, a fixing portion and a mounting groove, wherein the exhaust hole and the fixing portion are both provided in the mounting groove, and the exhaust hole is inclined in a direction away from the fixing portion; the groove wall of the mounting groove has a slope portion, and the slope portion is provided on a side of the exhaust hole away from the fixing portion, and the slope portion is inclined in a direction away from the fixing portion.

[0005] In one embodiment, the angle between the inclined direction of the exhaust hole and the central axis of the bearing is not less than 20° and not more than 30°.

[0006] In one embodiment, the angle between the inclined direction of the exhaust hole and the central axis of the bearing is 25°.

[0007] In one embodiment, in a direction from an air inlet end of the exhaust hole to an air outlet end of the exhaust hole, an area of ​​a cross section of the exhaust hole remains unchanged.

[0008] In one embodiment, the cross-sectional area of ​​the exhaust hole gradually decreases in a direction from an air inlet end of the exhaust hole to an air outlet end of the exhaust hole.

[0009] In one embodiment, the angle between the inclined direction of the exhaust hole and the central axis of the bearing is θ1, and the angle between the inclined direction of the slope and the central axis of the bearing is θ2, wherein θ2≥θ1.

[0010] In one embodiment, the bearing is further provided with a plurality of connection holes, the connection holes passing through two opposite end surfaces of the bearing, and the plurality of connection holes are arranged at intervals along the circumference of the bearing.

[0011] The utility model also provides a rotary compressor, comprising:

[0012] a cylinder having an exhaust port;

[0013] A bearing, wherein the bearing is the above-mentioned bearing, the bearing is arranged on one side of the cylinder, and the exhaust port is connected to the exhaust hole; and

[0014] An exhaust valve is installed in the installation groove; one end of the exhaust valve is fixedly connected to the fixing portion, and the other end is movably arranged at the exhaust hole to open or block the exhaust hole.

[0015] In one embodiment, an inner wall of the exhaust port is provided with an oblique cut, and the inclination direction of the oblique cut is consistent with the inclination direction of the exhaust hole.

[0016] In one embodiment, the rotary compressor further includes a limiter, which is installed in the installation groove and is disposed on a side of the exhaust valve away from the bottom wall of the installation groove to limit the movement of the exhaust valve.

[0017] The technical solution of the utility model is to make the exhaust hole be more consistent with the flow direction of the airflow discharged from the cylinder in the rotary compressor using the bearing by tilting the exhaust hole in the direction away from the fixed part, thereby reducing the risk of large angle deflection during gas flow, reducing flow resistance, and improving the compression performance of the rotary compressor using the bearing. In addition, by arranging the exhaust hole and the fixed part in the mounting groove, one end of the air supply and exhaust valve can be located in the mounting groove after being connected to the fixed part, thereby saving installation space. By providing a ramp portion on the groove wall of the mounting groove, the ramp portion is arranged on the side of the exhaust hole away from the fixed part, so that the gas discharged from the exhaust hole can be further discharged to the outside of the bearing through the guiding effect of the ramp portion; and the ramp portion is tilted in the direction away from the fixed part, so that the inclination direction of the ramp portion is also more consistent with the flow direction of the airflow, thereby further reducing the resistance of the airflow flow and improving the compression performance of the compressor using the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A structural schematic diagram of an embodiment of a bearing provided by the utility model;

[0020] Figure 2 for Figure 1Sectional view at AA in the middle;

[0021] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0022] Figure 4 A cross-sectional view of another embodiment of a bearing provided by the utility model;

[0023] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0024] Figure 6 A sectional view of a partial structure of a rotary compressor provided by the utility model.

[0025] Description of Figure Numbers:

[0026] 100, bearing; 110, mounting groove; 111, slope portion; 120, fixing portion; 130, exhaust hole; 140, connecting hole.

[0027] 200, cylinder; 210, exhaust port.

[0028] 300. Exhaust valve.

[0029] 400. Limiting parts.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] The rotary compressor generally includes a cylinder 200 and a bearing 100 disposed on one side of the cylinder 200. A piston is disposed in the cylinder 200. The crankshaft passes through the bearing 100 and is in transmission connection with the piston in the cylinder 200 to drive the piston to rotate in the cylinder 200. A slider is disposed in the cylinder 200, and the slider divides the cylinder 200 into an air intake chamber and an air discharge chamber. When the crankshaft drives the piston to rotate, the volumes of the air intake chamber and the air discharge chamber change, so that high-pressure gas is discharged from the air discharge chamber. An exhaust port 210 is provided on the wall of the air discharge chamber, and an exhaust hole 130 connected to the exhaust port 210 is disposed on the bearing 100. The central axis of the conventional exhaust hole 130 is generally arranged parallel to the central axis of the bearing 100. When the airflow enters the exhaust hole 130 of the bearing 100, its flow direction turns at a large angle, so that the resistance during the gas flow is large, the over-compression loss increases, and the working performance of the compressor decreases.

[0035] In order to improve the problem of large resistance in the rotary compressor during exhaust, the utility model provides a bearing 100 .

[0036] Please refer to Figures 1 to 5 In one embodiment of the utility model, the bearing 100 is provided with an exhaust hole 130, a fixing portion 120 and a mounting groove 110. The exhaust hole 130 and the fixing portion 120 are both provided in the mounting groove 110, and the exhaust hole 130 is inclined in a direction away from the fixing portion 120; the groove wall of the mounting groove 110 has a slope portion 111, and the slope portion 111 is provided on a side of the exhaust hole 130 away from the fixing portion 120, and the slope portion 111 is inclined in a direction away from the fixing portion 120.

[0037] The exhaust hole 130 is used to further guide the gas exhausted from the cylinder 200 so that the gas is discharged to an area outside the bearing 100. The exhaust hole 130 can be a circular hole, a rectangular hole, a trapezoidal hole or a hole of other shapes. In the technical solution of the utility model, the exhaust hole 130 is tilted in the direction away from the fixed portion 120, which means that along the exhaust direction, at least part of the gas is discharged in a tilted direction away from the fixed portion 120, so that the flow direction of the gas discharged in a tilted direction away from the fixed portion 120 is more consistent with the flow direction of the gas in the exhaust chamber, thereby reducing the risk of increased exhaust resistance caused by a large angle turn in the gas flow direction, thereby improving the compression performance of the rotary compressor. Specifically, when the exhaust hole 130 is tilted toward a direction away from the fixing portion 120, the entire side wall of the exhaust hole 130 can be tilted toward a direction away from the fixing portion 120; or the side wall of the exhaust hole 130 close to the fixing portion 120 is tilted toward the fixing portion 120, and the side wall of the exhaust hole 130 away from the fixing portion 120 can be parallel to the center line of the bearing 100; or, the side wall of the exhaust hole 130 away from the fixing portion 120 is tilted toward the fixing portion 120, and the side wall of the exhaust hole 130 close to the fixing portion 120 can be parallel to the center line of the bearing 100, etc.

[0038] It is understandable that in a rotary compressor, an exhaust valve 300 is usually provided at the exhaust hole 130. The exhaust valve 300 may be a valve plate structure. When the valve plate is mounted on the bearing 100, it may be connected to the fixing portion 120 of the bearing 100. That is, the fixing portion 120 refers to a structure for fixing the fixed end of the exhaust valve 300. The fixing portion 120 may be a hole structure or a fixed column structure, etc., as long as the effect of fixing one end of the exhaust valve 300 to the fixing portion 120 can be achieved.

[0039] The bearing 100 is also provided with a mounting groove 110 , and the fixing portion 120 and the exhaust hole 130 are both provided in the mounting groove 110 , and the installed exhaust valve 300 is also located in the mounting groove 110 , so that the mounting groove 110 can play a certain limiting effect on the installation of the exhaust valve 300 .

[0040] The groove wall of the mounting groove 110 can face multiple directions. The groove wall of the mounting groove 110 has a slope 111. The slope 111 is arranged on the side of the exhaust hole 130 away from the fixing part 120, and the slope 111 is closer to the exhaust hole 130. By tilting the slope 111 in the direction away from the fixing part 120, the difference between the tilt direction of the slope 111 and the tilt direction of the exhaust hole 130 is small, so that the gas can continue to flow along the slope 111 after flowing out of the exhaust hole 130 without turning at a large angle, and the gas can avoid other parts of the bearing 100, thereby reducing the pressure loss of the gas when it flows, and improving the compression performance of the rotary compressor.

[0041] The technical solution of the utility model makes the exhaust hole 130 tilted in the direction away from the fixing part 120, so that the exhaust hole 130 can be more consistent with the flow direction of the airflow discharged from the cylinder 200 in the rotary compressor using the bearing 100, thereby reducing the risk of large angle deflection during gas flow, reducing flow resistance, and improving the compression performance of the rotary compressor using the bearing 100. In addition, by arranging the exhaust hole 130 and the fixing part 120 in the installation groove 110, one end of the air supply and exhaust valve 300 can be located in the installation groove 110 after being connected to the fixing part 120, thereby saving installation space. By providing a slope portion 111 on the groove wall of the mounting groove 110, and the slope portion 111 is provided on the side of the exhaust hole 130 away from the fixing portion 120, the gas exhausted from the exhaust hole 130 can be further discharged to the outside of the bearing 100 through the guiding effect of the slope portion 111; and the slope portion 111 is inclined in the direction away from the fixing portion 120, so that the inclination direction of the slope portion 111 is also more consistent with the flow direction of the airflow, thereby further reducing the resistance of the airflow and improving the compression performance of the compressor using the bearing 100.

[0042] In the embodiment of the present invention, the angle between the inclined direction of the exhaust hole 130 and the central axis of the bearing 100 is not less than 20° and not more than 30°.

[0043] The central axis of the bearing 100 refers to the axis of the hole in the bearing 100 for the crankshaft to pass through. Figure 2 , Figure 4 or Figure 6 θ1) in the figure can be 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29° or 30°.

[0044] By setting the angle between the inclination direction of the exhaust hole 130 and the central axis of the bearing 100 to be no less than 20° and no more than 30°, the inclination direction of the exhaust hole 130 is made closer to the flow direction of the gas, so that the gas has less resistance during the flow process, which can reduce over-compression losses, reduce power consumption, and improve compression performance.

[0045] Furthermore, the included angle between the inclined direction of the exhaust hole 130 and the central axis of the bearing 100 is 25°.

[0046] After many tests and analyses, by setting the inclination direction of the exhaust hole 130 to an angle of 25° with the central axis of the bearing 100, the inclination direction of the exhaust hole 130 is more consistent with the flow direction of the gas, so that the hole wall of the exhaust hole 130 can better guide the flow of the gas, thereby making the gas flow resistance lower, the required power lower, and the compression performance better.

[0047] Please refer to Figures 1 to 3 Based on the scheme that the exhaust hole 130 is tilted in a direction away from the fixing portion 120, in one embodiment, the cross-sectional area of ​​the exhaust hole 130 remains unchanged in the direction from the air inlet end of the exhaust hole 130 to the air outlet end of the exhaust hole 130.

[0048] The cross section of the exhaust hole 130 refers to a plane perpendicular to the center line of the bearing 100. By keeping the cross section of the exhaust hole 130 constant in the direction from the air inlet end to the air outlet end of the exhaust hole 130, the manufacturing process of the exhaust hole 130 can be made simpler, that is, only one machining knife is used to make the central axis of the exhaust hole 130 tilted at a certain angle to the vertical direction and the fixed end of the machining knife tilted in a direction away from the fixing portion 120, so that the exhaust hole 130 as a whole can be tilted in a direction away from the fixing portion 120.

[0049] Please refer to Figure 4 and Figure 5 Based on the scheme that the exhaust hole 130 is tilted in a direction away from the fixing portion 120, in another embodiment, the cross-sectional area of ​​the exhaust hole 130 gradually decreases in the direction from the air inlet end of the exhaust hole 130 to the air outlet end of the exhaust hole 130.

[0050] In this embodiment, by gradually reducing the cross-sectional area of ​​the exhaust hole 130 in the direction from the air inlet end of the exhaust hole 130 to the air outlet end of the exhaust hole 130, the hole wall of the exhaust hole 130 on the side close to the fixed portion 120 is inclined toward the direction away from the fixed portion 120, and the hole wall of the exhaust hole 130 on the side away from the fixed portion 120 can be in a vertical direction, or the side of the exhaust hole 130 away from the fixed portion 120 can also be inclined toward the direction away from the fixed portion 120, and the angle between the side of the exhaust hole 130 away from the fixed portion 120 and the center line of the bearing 100 is smaller than the angle between the side of the exhaust hole 130 close to the fixed portion 120 and the center line of the bearing 100, so that the opening area of ​​the air inlet end of the exhaust hole 130 can be increased to reduce the risk of gas accumulation at the air inlet end of the exhaust hole 130, thereby reducing the resistance to gas flow, reducing over-compression loss, and improving the compression performance of the rotary compressor using the bearing 100.

[0051] In an example, please refer to Figure 2 and Figure 4 The angle between the inclination direction of the exhaust hole 130 and the central axis of the bearing 100 is θ1, and the angle between the inclination direction of the slope and the central axis of the bearing 100 is θ2, where θ2≥θ1.

[0052] If the angle between the inclination direction of the slope and the central axis of the bearing 100 is smaller than the angle between the inclination direction of the exhaust hole 130 and the central axis of the bearing 100, the gas discharged from the exhaust hole 130 will hit the slope, thereby increasing the flow resistance of the gas. In this embodiment, by setting the angle between the inclination direction of the slope and the central axis of the bearing 100 to be not less than the angle between the inclination direction of the exhaust hole 130 and the central axis of the bearing 100, the gas discharged from the exhaust hole 130 can be more smoothly and quickly guided out of the bearing 100 after passing through the slope, thereby reducing the risk of resistance of the groove wall of the mounting groove 110 to the gas flow, and improving the compression performance of the rotary compressor using the bearing 100.

[0053] like Figure 1 As shown, in the embodiment of the utility model, a plurality of connection holes 140 are further provided on the bearing 100 . The connection holes 140 penetrate two opposite end surfaces of the bearing 100 , and the plurality of connection holes 140 are arranged at intervals along the circumference of the bearing 100 .

[0054] By providing a plurality of connection holes 140, which penetrate two opposite end surfaces of the bearing 100, it is convenient to fix the bearing 100 with the cylinder 200 in the rotary compressor. By arranging the plurality of connection holes 140 at intervals along the circumference of the bearing 100, the bearing 100 can be connected to the cylinder 200 in the entire circumference when connected, thereby improving the connection stability between the cylinder 200 and the bearing 100.

[0055] Furthermore, if Figure 1 As shown, based on the scheme that the bearing 100 has a connecting hole 140, a certain distance is provided between the top edge of the ramp portion 111 and the edge of the connecting hole 140, so that when the muffler is installed on the bearing 100, a mounting base can be provided for the muffler cover mounting groove 110 and can be stably installed on the bearing 100.

[0056] The utility model also provides a rotary compressor, such as Figure 6 As shown, the rotary compressor includes a cylinder 200, a bearing 100 and an exhaust valve 300. The specific structure of the bearing 100 refers to the above embodiment. Since the rotary compressor adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the cylinder 200 has an exhaust port 210; the bearing 100 is arranged on one side of the cylinder 200, and the exhaust port 210 is connected to the exhaust hole 130; the exhaust valve 300 is installed in the installation groove 110; one end of the exhaust valve 300 is fixedly connected to the fixing part 120, and the other end is movably arranged at the exhaust hole 130 to open or block the exhaust hole 130.

[0057] The cylinder 200 has an exhaust port 210, and the exhaust port 210 is connected to the exhaust hole 130 of the bearing 100. Then, the airflow is discharged into the exhaust hole 130 through the exhaust port 210, and then the exhaust valve 300 movably arranged at the exhaust hole 130 is pushed open by the gas pressure, so that the exhaust valve 300 opens the exhaust hole 130. When the cylinder 200 does not exhaust, the exhaust valve 300 automatically blocks the exhaust hole 130. The exhaust valve 300 can be an elastic valve plate structure, and the elastic valve plate is arranged on one side of the exhaust port 210 of the exhaust hole 130. When the cylinder 200 no longer exhausts, the elastic valve plate automatically blocks the exhaust hole 130 under the action of its elastic force. Or the exhaust valve 300 can also be other structures such as a valve column, for example, the exhaust valve 300 can be a gravity valve, so that the exhaust hole 130 is automatically blocked under the action of gravity.

[0058] In this embodiment, the exhaust valve 300 can be installed in the installation groove 110, and one end is fixedly connected to the fixing portion 120, so that the stability of the exhaust valve 300 during installation and its stability during movement can be ensured.

[0059] The rotary compressor also includes a crankshaft. By arranging the bearing 100 on one side of the cylinder 200, the crankshaft in the rotary compressor can pass through the bearing 100 and be transmission-connected to the cylinder 200, thereby ensuring the stability of the installation of the crankshaft and the bearing 100 and ensuring that the rotary compressor can work stably. By arranging the exhaust hole 130 on the bearing 100 and communicating with the exhaust port 210, the risk of the bearing 100 blocking the discharge of gas from the cylinder 200 can be reduced.

[0060] In the embodiment of the present utility model, Figure 6 As shown, the inner wall of the exhaust port 210 is provided with an oblique cut, and the inclination direction of the oblique cut is consistent with the inclination direction of the exhaust hole 130 .

[0061] The inner wall of the exhaust port 210 is arranged as an oblique cut whose inclination direction is consistent with the inclination direction of the exhaust hole 130, so that the inclination direction of the oblique cut is more consistent with the flow direction of the gas in the exhaust chamber, thereby reducing the risk of the inner wall of the exhaust port 210 blocking the gas, reducing over-compression losses, and improving compression performance.

[0062] In the embodiment of the present utility model, Figure 6 As shown, the rotary compressor further includes a limiter 400 , which is installed in the mounting groove 110 and disposed on a side of the exhaust valve 300 away from the bottom wall of the mounting groove 110 , for limiting the movement of the exhaust valve 300 .

[0063] By setting a limit member 400, and the limit member 400 is installed in the installation groove 110 and is arranged on the side of the bottom wall of the exhaust valve 300 away from the installation groove 110, the limit member 400 can have a good limiting effect on the movement stroke of the exhaust valve 300 when opening the exhaust hole 130, thereby reducing the risk of the exhaust valve 300 detaching from the bearing 100.

[0064] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A bearing, characterized in that: The bearing is provided with an exhaust hole, a fixing portion and a mounting groove, wherein the exhaust hole and the fixing portion are both provided in the mounting groove, and the exhaust hole is inclined in a direction away from the fixing portion; a groove wall of the mounting groove has a slope portion, and the slope portion is provided on a side of the exhaust hole away from the fixing portion, and the slope portion is inclined in a direction away from the fixing portion.

2. The bearing according to claim 1, characterized in that The angle between the inclined direction of the exhaust hole and the central axis of the bearing is not less than 20° and not more than 30°.

3. The bearing according to claim 2, characterized in that The included angle between the inclined direction of the exhaust hole and the central axis of the bearing is 25°.

4. The bearing according to claim 1, characterized in that: In the direction from the air inlet end of the exhaust hole to the air outlet end of the exhaust hole, the area of ​​the cross section of the exhaust hole remains unchanged.

5. The bearing according to claim 1, characterized in that: In a direction from an air inlet end of the exhaust hole to an air outlet end of the exhaust hole, a cross-sectional area of ​​the exhaust hole gradually decreases.

6. The bearing according to any one of claims 1 to 5, characterized in that The angle between the inclined direction of the exhaust hole and the central axis of the bearing is θ1, and the angle between the inclined direction of the slope and the central axis of the bearing is θ2, wherein θ2≥θ1.

7. The bearing according to claim 6, characterized in that The bearing is also provided with a plurality of connection holes, which penetrate through two opposite end surfaces of the bearing, and the plurality of connection holes are arranged at intervals along the circumference of the bearing.

8. A rotary compressor, characterized in that: include: a cylinder having an exhaust port; A bearing, wherein the bearing is the bearing according to any one of claims 1 to 7, the bearing is disposed on one side of the cylinder, and the exhaust port is communicated with the exhaust hole; and An exhaust valve is installed in the installation groove; one end of the exhaust valve is fixedly connected to the fixing portion, and the other end is movably arranged at the exhaust hole to open or block the exhaust hole.

9. The rotary compressor according to claim 8, characterized in that An inner wall of the exhaust port is provided with an oblique cut, and the inclination direction of the oblique cut is consistent with the inclination direction of the exhaust hole.

10. The rotary compressor according to claim 8, wherein: The rotary compressor further comprises a limiting member, which is installed in the installation groove and is arranged on a side of the exhaust valve away from the bottom wall of the installation groove, so as to limit the movement of the exhaust valve.

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