Air cylinder and compressor

Abstract

The invention belongs to the technical field of compressors, and discloses an air cylinder and a compressor, the air cylinder comprises a cylinder body, the side portion of the cylinder body is provided with a spring hole in the radial direction of the cylinder body, the cylinder body is provided with a blade groove, the blade groove penetrates from the upper end face to the lower end face of the cylinder body in the axial direction of the cylinder body, and the blade groove penetrates through the spring hole; the end, located on the upper end face of the cylinder body, of the oil collecting hole is larger than the end, located on the lower end face of the cylinder body, of the oil collecting hole. According to the air cylinder and the compressor, the structure is simple, and the whole blade groove can be fully and reliably lubricated.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a cylinder and a compressor. Background Art

[0002] When the compressor is running, the blades in the cylinder rub against the blade grooves of the cylinder at high speed, which is a high risk point for abnormal wear. In order to improve the operating reliability of both, the existing technology improves the oil lubrication conditions by setting an oil guide hole structure.

[0003] In the prior art, the oil guide hole is only built in the upper part of the blade slot. When the oil level is low, the lower part has a high risk of wear. In addition, the straight hole design causes the oil to flow faster when passing through, which may not provide sufficient lubrication. Summary of the invention

[0004] The object of the present invention is to provide a cylinder and a compressor with a simple structure and capable of fully and reliably lubricating the entire blade groove.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A cylinder comprises a cylinder body; wherein:

[0007] A spring hole is provided on the side of the cylinder body along its radial direction, and a blade groove is provided on the cylinder body. The blade groove penetrates from the upper end surface of the cylinder body to the lower end surface along the axial direction of the cylinder body, and the spring hole is penetrated in the blade groove;

[0008] The cylinder body is provided with an oil collecting hole penetrating the blade groove along its axial direction, and one end of the oil collecting hole located on the upper end surface of the cylinder body is larger than the other end located on the lower end surface of the cylinder body.

[0009] Preferably, the oil collecting hole comprises a first hole portion and a second hole portion;

[0010] The first hole portion is configured as a tapered hole whose diameter gradually decreases from the upper end surface of the cylinder body to the spring hole; and / or,

[0011] The second hole portion is configured as a tapered hole whose diameter gradually decreases from the spring hole to the lower end surface of the cylinder body.

[0012] Preferably, the first hole portion forms two symmetrically arranged first grooves on two opposite side walls of the blade groove, and the second hole portion forms two symmetrically arranged second grooves on two opposite side walls of the blade groove.

[0013] Preferably, the first hole portion and the second hole portion are coaxially arranged.

[0014] Preferably, a generatrix of the first tapered hole portion and a generatrix of the second tapered hole portion are located on the same straight line.

[0015] Preferably, the cylinder body comprises a main body and a fan-shaped portion protruding outward from the main body, the spring hole extends from the outer side wall of the fan-shaped portion to the main body, and the blade groove extends from the inner side wall of the main body to the fan-shaped portion;

[0016] On the upper end surface of the cylinder body, the sector portion is connected to the main body portion via an oil collecting groove, and the oil collecting hole is opened on the oil collecting groove.

[0017] Preferably, on the upper end surface of the cylinder body, the sector portion is arranged to be tilted downward along the radial direction of the cylinder body toward the direction close to the oil collecting groove.

[0018] Preferably, the oil collecting trough includes a first side and a second side respectively extending to the two side edges of the fan-shaped portion, the oil collecting hole is opened between the first side and the second side of the oil collecting trough, and the first side and the second side of the oil collecting trough are respectively inclined downward toward the side where the oil collecting hole is opened.

[0019] Preferably, it also includes an upper cylinder cover arranged on the cylinder body, and the upper cylinder cover is provided with a plurality of oil return holes along its circumference, at least one of the oil return holes is located above the fan-shaped portion, and the lubricating oil flowing out of the oil return hole located above the fan-shaped portion can fall into the fan-shaped portion and flow into the oil collecting tank.

[0020] A compressor, comprising:

[0021] shell;

[0022] The cylinder as described in any one of the above items is arranged in the shell.

[0023] Beneficial effects:

[0024] The cylinder provided by the present invention has an oil collecting hole formed on the cylinder body and extending through the blade groove along its axial direction. When the lubricating oil pumped up by the oil pump plate flows down from the upper part of the shell, it will flow through the oil collecting hole, that is, the lubricating oil flows from the upper end face of the cylinder body to the lower end face, and passes through the entire blade groove, so that the blade groove can be reliably lubricated as a whole. In addition, the end of the oil collecting hole located on the upper end face of the cylinder body is larger than the end located on the lower end face of the cylinder body. When the lubricating oil flows through the oil collecting hole, the flow rate is further slowed down due to the reduction of the hole diameter, thereby being able to provide sufficient and reliable lubrication in the blade groove.

[0025] The compressor provided by the present invention uses the above-mentioned cylinder, has a simple structure, can fully and reliably lubricate the entire blade groove, optimize the lubrication conditions between the blades and the cylinder blade grooves, and improve the reliability of the compressor pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a cylinder body provided by the present invention;

[0027] Figure 2 It is a structural cross-sectional view of a cylinder body provided by the present invention;

[0028] Figure 3 It is a structural schematic diagram of the cylinder provided by the present invention.

[0029] In the figure:

[0030] 1. Cylinder body; 101. Spring hole; 102. Blade groove; 103. First hole portion; 1031. First groove; 104. Second hole portion; 1041. Second groove; 11. Main body portion; 12. Fan-shaped portion; 13. Oil collecting groove; 14. Transition fillet;

[0031] 2. Upper cylinder cover; 21. Oil return hole. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] This embodiment provides a cylinder. Figures 1 to 3 As shown, the cylinder includes a cylinder body 1, a spring hole 101 is opened on the side of the cylinder body 1 along its radial direction, and a blade groove 102 is opened on the cylinder body 1. The blade groove 102 passes through the upper end surface of the cylinder body 1 to the lower end surface along the axial direction of the cylinder body 1, and the spring hole 101 is penetrated by the blade groove 102. The cylinder body 1 is opened along its axial direction and passes through the blade groove 102. The end of the oil collecting hole located on the upper end surface of the cylinder body 1 is larger than the end located on the lower end surface of the cylinder body 1.

[0037] In this embodiment, an oil collecting hole is opened on the cylinder body 1 along its axial direction and penetrates the blade groove 102. When the lubricating oil pumped up by the oil pump plate flows down from the upper part of the housing, it will flow through the oil collecting hole, that is, the lubricating oil flows from the upper end surface of the cylinder body 1 to the lower end surface, and passes through the entire blade groove 102, so that the blade groove 102 can be reliably lubricated as a whole. In addition, the end of the oil collecting hole located on the upper end surface of the cylinder body 1 is larger than the end located on the lower end surface of the cylinder body 1. When the lubricating oil flows through the oil collecting hole, the flow rate is further slowed down due to the reduction in the aperture, thereby providing sufficient and reliable lubrication in the blade groove 102.

[0038] Specifically, the oil collecting hole includes a first hole portion 103 and a second hole portion 104. The first hole portion 103 is configured as a tapered hole with a diameter gradually decreasing from the upper end surface of the cylinder body 1 to the spring hole 101; and / or the second hole portion 104 is configured as a tapered hole with a diameter gradually decreasing from the spring hole 101 to the lower end surface of the cylinder body 1. Preferably, both the first hole portion 103 and the second hole portion 104 are configured as tapered holes.

[0039] When the lubricating oil pumped up by the oil pump plate flows down from the upper part of the housing, it will flow through the first hole portion 103 and the second hole portion 104 in sequence, that is, the lubricating oil flows from the upper end surface of the cylinder body 1 to the lower end surface, and passes through the entire blade groove 102, so that the entire blade groove 102 can be reliably lubricated. And because the first hole portion 103 and the second hole portion 104 are both configured as tapered holes, the flow rate of the lubricating oil is uniformly slowed down during the flow process, achieving a fully reliable lubrication effect on the blade groove 102.

[0040] Specifically, the minimum diameter of the tapered first hole portion 103 is ΦD1, and the maximum diameter of the tapered second hole portion 104 is ΦD2, where ΦD1>ΦD2.

[0041] In this embodiment, the first hole portion 103 and the second hole portion 104 are coaxially arranged, which is convenient for processing, so that the first hole portion 103 and the second hole portion 104 can be punched and formed at one time.

[0042] In this embodiment, the generatrix of the tapered first hole portion 103 and the generatrix of the tapered second hole portion 104 are located on the same straight line. This arrangement is also convenient for processing, and it is convenient for the first hole portion 103 and the second hole portion 104 to be punched and formed at one time.

[0043] In this embodiment, the first hole portion 103 forms two symmetrically arranged first grooves 1031 on the two opposite side walls of the blade groove 102, and the second hole portion 104 forms two symmetrically arranged second grooves 1041 on the two opposite side walls of the blade groove 102. The above structure, i.e., the center of the first hole portion 103 and the center of the second hole portion 104 are both located on the center line between the two side walls of the blade groove 102. Such a configuration can ensure that the lubricating oil can evenly lubricate the two opposite side walls of the blade groove 102 during the flow process, and avoid uneven lubrication caused by too little lubricating oil on one side.

[0044] In addition to being configured as tapered holes, the first hole portion 103 and the second hole portion 104 may also be configured as other shapes. For example, the two side edges of the axial cross section of the first hole portion 103 and the second hole portion 104 are configured as concave arc cross section lines, or the two side edges of the axial cross section of the first hole portion 103 and the second hole portion 104 are configured as stepped cross section lines that gradually tilt inward.

[0045] Specifically in this embodiment, the cylinder body 1 includes a main body 11 and a sector-shaped portion 12 protruding from the main body 11, the spring hole 101 extends from the outer side wall of the sector-shaped portion 12 to the main body 11, and the blade groove 102 extends from the inner side wall of the main body 11 to the sector-shaped portion 12. On the upper end surface of the cylinder body 1, the sector-shaped portion 12 and the main body 11 are connected through an oil collecting groove 13, and the oil collecting hole is opened on the oil collecting groove 13. Specifically, the lubricating oil pumped up by the oil pump plate flows down from the upper part of the shell, and the lubricating oil is allowed to converge to the oil collecting groove 13 through the sector-shaped inclined surface, and then the lubricating oil finally falls into the oil collecting hole through the oil collecting groove 13.

[0046] In this embodiment, the diameter of the first hole portion 103 of the oil collecting hole is larger than the diameter of the oil collecting groove 13. This arrangement is convenient for processing and ensures that the lubricating oil in the oil collecting groove 13 can reliably and fully fall into the first hole portion 103.

[0047] In some other optional implementations, the diameter of the first hole portion 103 may also be smaller than or equal to the width of the oil collecting groove 13, and may be adaptively adjusted according to actual needs.

[0048] In this embodiment, on the upper end surface of the cylinder body 1, the sector 12 is inclined downwardly along the radial direction of the cylinder body 1 toward the direction close to the oil collecting groove 13. Figure 1 to Figure 2 As shown, a first contour arc A is provided on the outer side of the sector 12, and a second contour arc B is formed at the connection between the sector 12 and the oil collecting tank 13. The distance between the first contour arc A and the lower end surface of the cylinder is H1, and the distance between the second contour arc B and the lower end surface of the cylinder is H2. H1 and H2 satisfy that H1>H2. With such a configuration, after the lubricating oil flows onto the sector 12, it can automatically flow to the oil collecting tank 13 along the inclined surface of the sector 12 under the action of gravity.

[0049] In this embodiment, the oil collecting groove 13 includes a first side and a second side respectively extending to the edges of both sides of the fan-shaped portion 12, the oil collecting hole is opened between the first side and the second side of the oil collecting groove 13, and the first side and the second side of the oil collecting groove 13 are respectively inclined downward toward the side where the oil collecting hole is opened. Specifically, the distance from the upper end surface to the lower end surface of the cylinder body 1 on the first side of the oil collecting groove 13 is h1, the distance from the upper end surface to the lower end surface of the cylinder body 1 on the second side of the oil collecting groove 13 is h2, and the distance from the upper end surface to the lower end surface of the cylinder body 1 on the oil collecting hole is h3, and h1, h2, and h3 satisfy: h1>h3, h2>h3.

[0050] Such arrangement enables the lubricating oil falling into the first side and the second side of the oil collecting groove 13 to automatically flow to the oil collecting hole under the action of gravity, thereby realizing the reliable flow of the lubricating oil.

[0051] In this embodiment, the main body 11 and the sector 12 are connected via a transition fillet 14. Specifically, two opposite sides of the oil collecting groove 13 extend to the transition fillet 14 on the corresponding side.

[0052] In this embodiment, the cylinder further includes an upper cylinder head 2 disposed on the cylinder body 1, and the upper cylinder head 2 is provided with a plurality of oil return holes 21 along its circumference, and at least one oil return hole 21 is located above the fan-shaped portion 12, and the lubricating oil flowing out of the oil return hole 21 located above the fan-shaped portion 12 can fall into the fan-shaped portion 12 and flow into the oil collecting groove 13. Specifically, in this embodiment, the upper cylinder head 2 is evenly distributed with a plurality of oil return holes 21 at equal intervals along its circumference, and one of the oil return holes 21 is located above the fan-shaped portion 12.

[0053] This embodiment also provides a compressor. The compressor includes a shell and the above-mentioned cylinder arranged in the shell.

[0054] The above-mentioned cylinder is used in a compressor, so that all the beneficial effects of the above-mentioned cylinder can be obtained, the entire blade groove 102 can be fully and reliably lubricated, the lubrication conditions between the blades and the cylinder blade groove 102 can be optimized, and the reliability of the compressor pump body can be improved.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cylinder, characterized in that: It comprises a cylinder body (1); wherein, A spring hole (101) is provided on the side of the cylinder body (1) along its radial direction, and a blade groove (102) is provided on the cylinder body (1). The blade groove (102) penetrates from the upper end surface of the cylinder body (1) to the lower end surface along the axial direction of the cylinder body (1), and the spring hole (101) is penetrated by the blade groove (102); The cylinder body (1) is provided with an oil collecting hole penetrating the blade groove (102) along its axial direction, and the oil collecting hole is located at one end of the upper end surface of the cylinder body (1) and is larger than the other end of the lower end surface of the cylinder body (1).

2. The cylinder according to claim 1, characterized in that The oil collecting hole comprises a first hole portion (103) and a second hole portion (104); The first hole portion (103) is configured as a tapered hole whose diameter gradually decreases from the upper end surface of the cylinder body (1) to the spring hole (101); and / or, The second hole portion (104) is configured as a tapered hole whose diameter gradually decreases from the spring hole (101) to the lower end surface of the cylinder body (1).

3. The cylinder according to claim 2, characterized in that The first hole portion (103) forms two symmetrically arranged first grooves (1031) on two opposite side walls of the blade groove (102), and the second hole portion (104) forms two symmetrically arranged second grooves (1041) on two opposite side walls of the blade groove (102).

4. The cylinder according to claim 2, characterized in that The first hole portion (103) and the second hole portion (104) are coaxially arranged.

5. The cylinder according to claim 2, characterized in that: A generatrix of the tapered first hole portion (103) and a generatrix of the tapered second hole portion (104) are located on the same straight line.

6. The cylinder according to claim 1, characterized in that The cylinder body (1) comprises a main body (11) and a fan-shaped portion (12) protruding outward from the main body (11); the spring hole (101) extends from the outer side wall of the fan-shaped portion (12) to the main body (11); and the blade groove (102) extends from the inner side wall of the main body (11) to the fan-shaped portion (12); On the upper end surface of the cylinder body (1), the sector portion (12) and the main body portion (11) are connected via an oil collecting groove (13), and the oil collecting hole is opened on the oil collecting groove (13).

7. The cylinder according to claim 6, characterized in that On the upper end surface of the cylinder body (1), the sector portion (12) is arranged to be inclined downward along the radial direction of the cylinder body (1) toward a direction close to the oil collecting groove (13).

8. The cylinder according to claim 6, characterized in that The oil collecting groove (13) comprises a first side and a second side respectively extending to the edges of both sides of the fan-shaped portion (12); the oil collecting hole is opened between the first side and the second side of the oil collecting groove (13); and the first side and the second side of the oil collecting groove (13) are respectively inclined downward toward the side where the oil collecting hole is opened.

9. The cylinder according to claim 6, characterized in that It also includes an upper cylinder cover (2) arranged on the cylinder body (1), wherein the upper cylinder cover (2) is provided with a plurality of oil return holes (21) along its circumference, and at least one of the oil return holes (21) is located above the fan-shaped portion (12). Lubricating oil flowing out of the oil return hole (21) located above the fan-shaped portion (12) can fall into the fan-shaped portion (12) and flow into the oil collecting groove (13).

10. A compressor, characterized in that: include: shell; The cylinder according to any one of claims 1 to 9, wherein the cylinder is disposed in the housing.

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