An oil-free mechanical seal

Abstract

The utility model discloses a kind of oil-free machine sealing devices, including first machine cover and second machine cover, the utility model is in the process of using, by first sealing assembly to realize the "air seal" process of sealing assembly, prevent compressed gas from leaking to bearing hole, sealing outer ring is set in the second machine cover inside, sealing inner tube is set in the sealing outer ring inside, sealing fixed frame is set in the sealing outer ring one side, third sealing assembly includes sealing built-in seat, first sealing ring and second sealing ring, by second sealing assembly and third sealing assembly to realize the "oil seal" process of sealing assembly, oil can be prevented and leaked to compression cavity along axial direction, by the above setting, to improve the sealing effect of device, effectively avoid gas from leaking to bearing hole, to ensure the sealing of oil-free machine internal gas.

Description

Technical Field

[0001] This utility model relates to the field of oil-free machine sealing technology, specifically to an oil-free machine sealing device. Background Technology

[0002] Oil-free machines typically refer to fluid machinery such as oil-free air compressors and oil-free vacuum pumps. The core function of an oil-free machine is to compress or transport gas (such as the compressed air output by an oil-free air compressor) or to create a vacuum (such as an oil-free vacuum pump). Sealing is the foundation for achieving this function, and leakage will directly lead to equipment failure.

[0003] Most existing oil-free machine sealing devices have complex structures and poor sealing effects, making it easy for gas to leak into the bearing holes. This makes it difficult to ensure the airtightness of the gas inside the oil-free machine, thus making it difficult to guarantee the stable and continuous operation of the oil-free machine. Utility Model Content

[0004] The purpose of this invention is to provide an oil-free machine sealing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an oil-free machine sealing device, comprising a first cover and a second cover, the second cover being disposed on one side of the first cover, a first sealing component being disposed inside the first cover, a second sealing component and a third sealing component being disposed inside the second cover, and a leakage pipe being disposed inside the second cover.

[0006] Preferably, the first sealing assembly includes a first sealing chuck, a sealing clamp, and a second sealing chuck. The first sealing chuck is disposed inside the first cover, the second sealing chuck is disposed inside the second cover, and the sealing clamp is disposed between the first sealing chuck and the second sealing chuck.

[0007] Preferably, the second sealing assembly includes a sealing outer ring, a sealing inner tube, and a sealing fixing bracket. The sealing outer ring is disposed inside the second cover, the sealing inner tube is disposed inside the sealing outer ring, and the sealing fixing bracket is disposed on one side of the sealing outer ring.

[0008] Preferably, the third sealing assembly includes a sealing inner seat, a first sealing ring, and a second sealing ring. The sealing inner seat is disposed inside the second cover, the first sealing ring is disposed on the inner side of the sealing inner seat, and the second sealing ring is disposed on one side of the first sealing ring.

[0009] Preferably, the first cover and the second cover are respectively provided with a first connecting hole and a second connecting hole at opposite ends.

[0010] Preferably, there are several first connecting holes, which are equidistantly distributed along the periphery of the first cover, and the second connecting holes are provided corresponding to the connecting holes.

[0011] Preferably, the exterior of the first cover is provided with ventilation holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The first cover and the second cover are respectively connected to external equipment, wherein a portion of the length of the second cover is located inside the first cover, the first sealing chuck is located inside the first cover, the second sealing chuck is located inside the second cover, and the sealing clamp is located between the first sealing chuck and the second sealing chuck. The first sealing assembly achieves the "air seal" process of the sealing assembly, preventing the leakage of compressed gas into the bearing hole. The sealing outer ring is located inside the second cover, the sealing inner tube is located inside the sealing outer ring, and the sealing fixing bracket is located on one side of the sealing outer ring. The third sealing assembly includes a sealing inner seat, a first sealing ring, and a second sealing ring. The second sealing assembly and the third sealing assembly achieve the "oil seal" process of the sealing assembly, preventing oil from leaking axially into the compression chamber. A leakage pipe is provided inside the second cover, which is connected to the outside. The trace amounts of gas and lubricating oil leaked by the "air seal" and "oil seal" leak to the outside through the leakage pipe, ensuring that the compression chamber is oil-free, thereby achieving the sealing process of the oil-free machine. Attached Figure Description

[0013] Figure 1 This is an overall schematic diagram of the device in this utility model; Figure 2 In this utility model Figure 1 Another perspective view; Figure 3 This is a side sectional view of the entire device in this utility model; Figure 4 In this utility model Figure 3 A magnified view of a portion of the image.

[0014] In the diagram: 1. First cover; 2. Second cover; 3. First sealing assembly; 31. First sealing chuck; 32. Sealing clamp; 33. Second sealing chuck; 4. Second sealing assembly; 41. Sealing outer ring; 42. Sealing inner tube; 43. Sealing fixing bracket; 5. Third sealing assembly; 51. Sealing inner seat; 52. First sealing ring; 53. Second sealing ring; 6. Leakage channel; 7. First connecting hole; 8. Second connecting hole; 9. Vent hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4 This utility model provides a technical solution: Example: An oil-free machine sealing device: An oil-free machine sealing device includes a first cover 1 and a second cover 2. The second cover 2 is disposed on one side of the first cover 1. A first sealing component 3 is disposed inside the first cover 1. A second sealing component 4 and a third sealing component 5 are disposed inside the second cover 2. A leakage pipe 6 is disposed inside the second cover 2.

[0017] The first sealing assembly 3 includes a first sealing chuck 31, a sealing clamp 32 and a second sealing chuck 33. The first sealing chuck 31 is disposed inside the first cover 1, the second sealing chuck 33 is disposed inside the second cover 2, and the sealing clamp 32 is disposed between the first sealing chuck 31 and the second sealing chuck 33.

[0018] In this embodiment, the first sealing component 3 is used to achieve the "air seal" process of the sealing component, preventing the leakage of compressed gas into the bearing hole.

[0019] The second sealing assembly 4 includes a sealing outer ring 41, a sealing inner tube 42, and a sealing fixing bracket 43. The sealing outer ring 41 is disposed inside the second cover 2, the sealing inner tube 42 is disposed inside the sealing outer ring 41, and the sealing fixing bracket 43 is disposed on one side of the sealing outer ring 41.

[0020] In this embodiment, the second sealing component 4 is used to achieve the "oil sealing" process of the sealing component, which can prevent oil from leaking into the compression chamber along the axial direction.

[0021] The third sealing assembly 5 includes a sealing inner seat 51, a first sealing ring 52 and a second sealing ring 53. The sealing inner seat 51 is disposed inside the second cover 2. The first sealing ring 52 is disposed on the inner side of the sealing inner seat 51, and the second sealing ring 53 is disposed on one side of the first sealing ring 52.

[0022] In this embodiment, the "oil sealing" process of the sealing assembly is achieved by the second sealing assembly 4 and the third sealing assembly 5, which can prevent oil from leaking into the compression chamber axially.

[0023] The first cover 1 and the second cover 2 are respectively provided with a first connecting hole 7 and a second connecting hole 8 at opposite ends.

[0024] In this embodiment, an external bolt can be used to bolt the first cover 1 and the second cover 2 through the first connecting hole 7 and the second connecting hole 8.

[0025] Several first connecting holes 7 are provided, and the several first connecting holes 7 are equidistantly distributed along the circumference of the first cover 1. The second connecting holes 8 are provided corresponding to the connecting holes 7.

[0026] In this embodiment, several first connecting holes 7 and second connecting holes 8 are used to allow several corresponding bolts to pass through, so as to ensure the firmness of the connection between the first cover 1 and the second cover 2.

[0027] The first cover 1 has a vent 9 on its exterior.

[0028] In this embodiment, the vent 9 is connected to the outside atmosphere, so that the bearing cavity inside the host can maintain a basic balance with the atmosphere.

[0029] Working principle: The first cover 1 and the second cover 2 are connected to external equipment respectively. A portion of the second cover 2 is located inside the first cover 1. The first sealing chuck 31 is located inside the first cover 1, and the second sealing chuck 33 is located inside the second cover 2. The sealing clamp 32 is located between the first sealing chuck 31 and the second sealing chuck 33. The first sealing assembly 3 achieves the "air seal" process of the sealing assembly, preventing compressed gas from leaking into the bearing hole. The sealing outer ring 41 is located inside the second cover 2, and the sealing inner tube 42 is located within the sealing outer ring 41. Inside, the sealing bracket 43 is located on one side of the sealing outer ring 41. The third sealing component 5 includes a sealing inner seat 51, a first sealing ring 52, and a second sealing ring 53. The second sealing component 4 and the third sealing component 5 achieve the "oil seal" process of the sealing component, which can prevent oil from leaking into the compression chamber along the axial direction. The second cover 2 is provided with a leakage pipe 6, which is connected to the outside. The trace amounts of gas and lubricating oil leaked from the "gas seal" and "oil seal" leak to the outside through the leakage pipe 6, ensuring that the compression chamber is oil-free, thereby achieving the sealing process of the oil-free machine.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-free machine sealing device, characterized in that: The device includes a first cover (1) and a second cover (2). The second cover (2) is disposed on one side of the first cover (1). A first sealing assembly (3) is disposed inside the first cover (1). A second sealing assembly (4) and a third sealing assembly (5) are disposed inside the second cover (2). A leakage pipe (6) is disposed inside the second cover (2). The first sealing assembly (3) includes a first sealing chuck (31), a sealing clamp (32), and a second sealing chuck (33). The first sealing chuck (31) is disposed inside the first cover (1), and the second sealing chuck (33) is disposed inside the second cover (2). The sealing clamp (32) is disposed between the first sealing chuck (31) and the second sealing chuck. Between (33), the second sealing assembly (4) includes a sealing outer ring (41), a sealing inner tube (42), and a sealing fixing bracket (43). The sealing outer ring (41) is disposed inside the second cover (2). The sealing inner tube (42) is disposed inside the sealing outer ring (41). The sealing fixing bracket (43) is disposed on one side of the sealing outer ring (41). The third sealing assembly (5) includes a sealing inner seat (51), a first sealing ring (52), and a second sealing ring (53). The sealing inner seat (51) is disposed inside the second cover (2). The first sealing ring (52) is disposed inside the sealing inner seat (51). The second sealing ring (53) is disposed on one side of the first sealing ring (52).

2. The oil-free machine sealing device according to claim 1, characterized in that: The first cover (1) and the second cover (2) are respectively provided with a first connecting hole (7) and a second connecting hole (8) at opposite ends.

3. The oil-free machine sealing device according to claim 2, characterized in that: The first connecting hole (7) is provided in a plurality of places, and the plurality of first connecting holes (7) are distributed at equal intervals along the periphery of the first cover (1). The second connecting hole (8) is provided in correspondence with the connecting hole (7).

4. The oil-free machine sealing device according to claim 1, characterized in that: The first cover (1) has a vent (9) on its exterior.

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