Sealing device for bearing end cover of piston type air compressor

Abstract

The utility model discloses a sealing device for a bearing end cover of a piston type air compressor, which comprises a bearing end cover body, a bearing body is arranged at the central position in the bearing end cover body, two ends of the bearing body extend to the outside of the bearing end cover body, and a lower cover ring is fixed at the top end of the bearing end cover body on the outer side of the bearing body. An annular part placing seat is mounted at the top end of the lower cover ring, an inner annular seat is arranged on the inner wall of the annular part placing seat, the bottom end of the inner annular seat extends to the outside of the bearing end cover body, a sealing ring is arranged on the inner wall of the inner annular seat, and a lower annular seat is arranged at the bottom end of the bearing end cover body on the outer side of the inner annular seat. According to the sealing device, the phenomenon that the sealing device is abraded after being used for a long time is reduced, the service life of the sealing device is prolonged, the purpose that the sealing device is easy to disassemble and maintain is achieved, the sealing effect of the sealing device on the bearing body during use is guaranteed, and the service life of the sealing device is prolonged. And the phenomenon that lubricating oil leaks from the outer side of the bearing body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a sealing device for a bearing end cover of a piston type air compressor. Background Art

[0002] Piston air compressors are one of many types of compressors. In air compressors, bearings are one of the various parts, and a bearing end cover component is usually set on the outside of the bearing. Lubricating oil is prone to leakage at the connection position between the bearing component and the bearing end cover component. In order to improve this phenomenon, a corresponding bearing end cover sealing device is required.

[0003] Reference publication number CN203604158U is a sealing device for a bearing end cover of a piston air compressor, which includes a bearing end cover and a sealing spiral. An external sealing device is installed in the middle position of the bearing end cover, and the sealing device includes a shaft seal gland and a bolt skeleton sealing ring. The bolt is connected to the bearing end cover and can fasten the shaft seal gland and the skeleton sealing ring to the bearing end cover; the skeleton sealing ring is compressed between the shaft seal gland and the bolt, and its inner diameter matches the inner diameter of the shaft section on the bearing end cover. The sealing device has a simple structure and is easy to install. There is no oil leakage when the machine is shut down, which is energy-saving and environmentally friendly. It solves the oil leakage problem caused by shutdown and wear of the sealing spiral when the traditional piston air compressor only uses the sealing spiral. According to the above, although the sealing device can be well applied, the overall wear resistance of this type of sealing device is generally general. After long-term use, the sealing device is prone to wear, which affects the service life of the sealing device and often troubles people. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing device for a bearing end cover of a piston air compressor, so as to solve the problem that although the sealing device proposed in the above background technology can be well applied, the overall wear resistance of such sealing devices is generally average. After long-term use, the sealing device is prone to wear, which affects the service life of the sealing device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing device for a bearing end cover of a piston air compressor, comprising a bearing end cover body, a bearing body is arranged at a central position inside the bearing end cover body, both ends of the bearing body extend to the outside of the bearing end cover body, a lower cover ring is fixed to the top end of the bearing end cover body outside the bearing body, an annular component seat is installed on the top end of the lower cover ring, an inner annular seat is arranged on the inner wall of the annular component seat, the bottom end of the inner annular seat extends to the outside of the bearing end cover body, a sealing ring is arranged on the inner wall of the inner annular seat, the inner wall of the sealing ring touches the outer wall of the bearing body, and a lower annular seat is arranged at the bottom end of the bearing end cover body outside the inner annular seat.

[0006] Preferably, equally spaced positioning seats are provided on the outer wall of the annular mounting seat, the bottom ends of the positioning seats touch the top ends of the bearing end cover body, and the angle between adjacent positioning seats is ninety degrees. The positioning seats are provided so as to facilitate the placement of the locking bolts.

[0007] Preferably, threaded holes are provided inside the bearing end cover body at the position of the positioning seat, and both ends of the threaded holes extend to the outside of the bearing end cover body. The threaded holes are provided so as to lock and place the lower end of the locking bolt.

[0008] Preferably, a locking bolt is installed at the top of the positioning seat, and the bottom end of the locking bolt passes through the positioning seat and is threadedly connected to the threaded hole. The locking bolt is provided so that the positioning seat can be installed on the top of the bearing end cover body.

[0009] Preferably, a twisting groove is provided at the center position of the top end of the locking bolt, and the twisting groove is provided in a cross-shaped structure, so that the locking bolt can be twisted.

[0010] Preferably, the inner annular seat, the annular mounting seat and the bearing end cover body are all made of aluminum alloy, and the sealing ring is made of polytetrafluoroethylene. By using aluminum alloy to make the components of the sealing device, the wear of the sealing device can be reduced.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the sealing device of the bearing end cover of the piston air compressor not only reduces the wear of the sealing device after long-term use, thereby extending the service life of the sealing device, but also achieves the purpose of facilitating the disassembly and maintenance of the sealing device, and ensures the sealing effect of the sealing device on the bearing body when the sealing device is used, thereby reducing the leakage of the lubricating oil from the outer side of the bearing body;

[0012] (1) By using aluminum alloy to make the inner annular seat, the annular mounting seat and the bearing end cover body, and using polytetrafluoroethylene to make the sealing ring, the overall wear resistance of the sealing device can be improved, thereby reducing the wear of the sealing device after long-term use, thereby extending the service life of the sealing device;

[0013] (2) By rotating the locking bolt and screwing the lower end of the locking bolt out to the outside of the threaded hole, the bearing end cover body is then fixed and the annular mounting seat is pulled upward, so that the positioning seat can be detached from the top of the bearing end cover body, and the annular mounting seat, the inner annular seat and the sealing ring can be disassembled, thereby achieving the purpose of facilitating the disassembly and maintenance of the sealing device;

[0014] (3) By arranging a sealing ring on the inner wall of the inner annular seat, when the bearing body is installed on the inner side of the bearing end cover body, the sealing ring can be located on the outer side of the bearing body because the positioning seat is installed on the top of the bearing end cover body, so that the sealing ring can seal the outer side of the bearing body, thereby ensuring the sealing effect of the sealing device on the bearing body when in use and reducing the phenomenon of leakage of lubricating oil from the outer side of the bearing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 3 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the utility model from top view.

[0019] In the figure: 1, bearing end cover body; 2, lower cover ring; 3, annular mounting seat; 4, positioning seat; 5, locking bolt; 501, twisting groove; 6, inner annular seat; 7, sealing ring; 8, bearing body; 9, lower annular seat; 10, threaded hole. DETAILED DESCRIPTION

[0020] 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. Based on the embodiments in 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.

[0021] See also Figure 1-4The utility model provides an embodiment: a sealing device for a bearing end cover of a piston air compressor, comprising a bearing end cover body 1, a bearing body 8 is arranged at the central position inside the bearing end cover body 1, both ends of the bearing body 8 extend to the outside of the bearing end cover body 1, a lower cover ring 2 is fixed to the top of the bearing end cover body 1 outside the bearing body 8, an annular component seat 3 is installed on the top of the lower cover ring 2, and equidistant positioning seats 4 are arranged on the outer wall of the annular component seat 3, the bottom end of the positioning seat 4 touches the top of the bearing end cover body 1, and the angle between adjacent positioning seats 4 is ninety degrees;

[0022] When in use, the positioning seat 4 is provided to facilitate the placement of the locking bolt 5;

[0023] The bearing end cover body 1 at the position of the positioning seat 4 is provided with a threaded hole 10, and both ends of the threaded hole 10 extend to the outside of the bearing end cover body 1;

[0024] When in use, the threaded hole 10 is provided so as to lock the lower end of the locking bolt 5;

[0025] The top of the positioning seat 4 is equipped with a locking bolt 5, and the bottom end of the locking bolt 5 passes through the positioning seat 4 and is threadedly connected with the threaded hole 10;

[0026] When in use, the locking bolt 5 is arranged so as to install the positioning seat 4 on the top end of the bearing end cover body 1;

[0027] A twisting groove 501 is provided at the center of the top of the locking bolt 5, and the twisting groove 501 is provided in a cross-shaped structure;

[0028] When in use, the locking bolt 5 is screwed by screwing the groove 501;

[0029] An inner annular seat 6 is arranged on the inner wall of the annular seat 3, the bottom end of the inner annular seat 6 extends to the outside of the bearing end cover body 1, the material structure of the inner annular seat 6, the annular seat 3 and the bearing end cover body 1 are all set to aluminum alloy, and the material structure of the sealing ring 7 is set to polytetrafluoroethylene;

[0030] When in use, the various parts of the sealing device are made of aluminum alloy to reduce the wear of the sealing device;

[0031] A sealing ring 7 is arranged on the inner wall of the inner annular seat 6 , and the inner wall of the sealing ring 7 contacts the outer wall of the bearing body 8 . A lower annular seat 9 is arranged at the bottom end of the bearing end cover body 1 outside the inner annular seat 6 .

[0032] When the embodiment of the present application is in use, firstly, a sealing ring 7 is arranged on the inner wall of the inner annular seat 6. When the bearing body 8 is installed on the inner side of the bearing end cover body 1, since the positioning seat 4 is installed on the top of the bearing end cover body 1, the sealing ring 7 can be located on the outside of the bearing body 8, so that the sealing ring 7 can seal the outside of the bearing body 8, thereby reducing the leakage of the lubricating oil on the outside of the bearing body 8. Then, by rotating the locking bolt 5, it is only necessary to screw the lower end of the locking bolt 5 out to the outside of the threaded hole 10, and then fix the bearing end cover body 1 and pull the annular component seat 3 upward, so that the positioning seat 4 can be detached from the top of the bearing end cover body 1, and the annular component seat 3, the inner annular seat 6 and the sealing ring 7 can be disassembled, so as to facilitate the disassembly and maintenance of the sealing device. Finally, by using aluminum alloy to make the inner annular seat 6, the annular component seat 3 and the bearing end cover body 1, and using polytetrafluoroethylene to make the sealing ring 7, the overall wear resistance of the sealing device can be improved, and the wear of the sealing device can be reduced, thereby completing the use of the sealing device.

Claims

1. A sealing device for a bearing end cover of a piston air compressor, characterized in that: It comprises a bearing end cover body (1); A bearing body (8) is arranged at a central position inside the bearing end cover body (1), and both ends of the bearing body (8) extend to the outside of the bearing end cover body (1); A lower cover ring (2) is fixed to the top of the bearing end cover body (1) outside the bearing body (8); an annular component seat (3) is installed on the top of the lower cover ring (2); an inner annular seat (6) is arranged on the inner wall of the annular component seat (3); and the bottom end of the inner annular seat (6) extends to the outside of the bearing end cover body (1); A sealing ring (7) is arranged on the inner wall of the inner annular seat (6), the inner wall of the sealing ring (7) contacts the outer wall of the bearing body (8), and a lower annular seat (9) is arranged at the bottom end of the bearing end cover body (1) outside the inner annular seat (6).

2. The sealing device for a bearing end cover of a piston air compressor according to claim 1, characterized in that: The outer wall of the annular component holder (3) is provided with equidistant positioning seats (4), the bottom ends of the positioning seats (4) touch the top ends of the bearing end cover body (1), and the angle between adjacent positioning seats (4) is ninety degrees.

3. The sealing device for a bearing end cover of a piston type air compressor according to claim 2, characterized in that: A threaded hole (10) is provided inside the bearing end cover body (1) at the position of the positioning seat (4), and both ends of the threaded hole (10) extend to the outside of the bearing end cover body (1).

4. The sealing device for a bearing end cover of a piston type air compressor according to claim 3, characterized in that: The top end of each of the positioning seats (4) is provided with a locking bolt (5), and the bottom end of each of the locking bolts (5) passes through the positioning seat (4) and is threadedly connected to the threaded hole (10).

5. The sealing device for a bearing end cover of a piston type air compressor according to claim 4, characterized in that: A twisting groove (501) is provided at the center position of the top end of the locking bolt (5), and the twisting groove (501) is provided in a cross-shaped structure.

6. The sealing device for a bearing end cover of a piston type air compressor according to claim 1, characterized in that: The material structure of the inner annular seat (6), the annular mounting seat (3) and the bearing end cover body (1) are all set to be aluminum alloy, and the material structure of the sealing ring (7) is set to be polytetrafluoroethylene.

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