Vacuum pump with pressure relief channel

Abstract

The utility model provides a vacuum pump with a pressure relief channel, which comprises a pump body, a pump cover and a rotor in a pump cavity enclosed by the pump body and the pump cover, a driving notch used for driving the rotor is arranged on the pump body, a pressure relief notch is arranged on the pump body, and the pressure relief channel is arranged in the driving notch. The pressure relief notch and the driving notch are located on different side faces of the pump body, a pressure relief channel is formed in the pump body, one end of the pressure relief channel is formed in the driving notch, and the other end of the pressure relief channel is formed in the pressure relief notch. Through the pressure relief channel arranged on the pump body, the inner side of the oil seal at the driving end of the pump body is communicated with the outside through the pressure relief channel based on the shape structure of the pump body, the pressure relief requirement when the pressure of the inner side of the oil seal at the driving end is too high is met, the oil leakage condition is prevented, the abnormal sound risk of the vacuum pump is reduced, and the service life of the vacuum pump is prolonged; and stable operation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a vacuum pump with a pressure relief channel. Background Art

[0002] According to statistics, in belt pulley-driven vacuum pumps, oil leakage and abnormal noise problems are the most common faults, accounting for about 90% of all faulty parts. After research, it is found that due to the excessive pressure inside the oil seal at the driving end and the inability to discharge the excessive pressure in a timely manner, oil leakage occurs at the driving end of the vacuum pump. The oil leakage problem will affect the internal oil pressure and oil volume of the vacuum pump and increase the risk of abnormal noise. The common preventive maintenance method is to define a fixed time for replacement to reduce the risk. However, the replacement of the vacuum pump requires a large amount of human, financial, and machine usage time resources. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects existing in the prior art. The utility model provides a vacuum pump with a pressure relief channel to solve the problem of excessive pressure inside the oil seal at the driving end of the existing vacuum pump.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a vacuum pump with a pressure relief channel, including a pump body, a pump cover, and a rotor in a pump chamber formed by the pump body and the pump cover. It is characterized in that a driving notch for driving the rotor is provided on the pump body, and a pressure relief notch is provided on the pump body. The pressure relief notch and the driving notch are located on different sides of the pump body. A pressure relief channel is provided on the pump body. One end of the pressure relief channel is opened in the driving notch, and the other end is opened on the pressure relief notch.

[0005] Further, a fixed shaft seat is provided on the pump body. The pressure relief notch is opened on the fixed shaft seat. The pressure relief channel includes a first pressure relief channel and a second pressure relief channel. The first pressure relief channel penetrates the driving notch and the fixed shaft seat along the width direction of the fixed shaft seat. The second pressure relief channel penetrates the pressure relief notch and the fixed shaft seat along the height direction of the fixed shaft seat, and the first pressure relief channel communicates with the second pressure relief channel.

[0006] Further, a blocking ball for blocking the first pressure relief channel is provided at one end of the first pressure relief channel away from the driving notch.

[0007] Further, a blocking ball for blocking the second pressure relief channel is provided at one end of the second pressure relief channel away from the pressure relief notch.

[0008] Further, the first pressure relief channel and the second pressure relief channel are vertically communicated.

[0009] Further, a plurality of fixing notches for fixing a vacuum pump are formed in the width direction of the fixed shaft seat.

[0010] Compared with the prior art, the beneficial effects of the present utility model include: through the pressure relief channel provided on the pump body, based on the shape and structure of the pump body, the pressure relief channel communicates the inside of the oil seal at the driving end of the pump body with the outside, meeting the pressure relief requirement when the pressure inside the oil seal at the driving end is too high, preventing oil leakage and reducing the risk of abnormal noise of the vacuum pump, prolonging the service life of the vacuum pump, and ensuring its stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0012] Figure 1 Schematically shows the overall structure of a vacuum pump with a pressure relief channel;

[0013] Figure 2 Schematically shows the sectional structure of a vacuum pump with a pressure relief channel.

[0014] Reference numerals in the drawings: 1 - pump body, 2 - pump cover, 3 - driving notch, 4 - pressure relief notch, 5 - fixed shaft seat, 6 - first pressure relief channel, 7 - second pressure relief channel, 8 - plug ball, 9 - fixing notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural forms and implementation manners that can be mutually replaced. Therefore, the following detailed description and the accompanying drawings are only illustrative of the technical solution of the present utility model and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0016] Figure 1 Schematically shows the overall structure of a vacuum pump with a pressure relief channel, as Figure 1 shown, a vacuum pump with a pressure relief channel includes a pump body 1 and a rotor in the pump chamber formed by the pump body 1 and the pump cover 2. A driving notch 3 for driving the rotor is formed on the pump body 1, and a driving notch 3 for driving the rotor is formed on the pump body 1. A pressure relief notch 4 is formed on the pump body 1. The lower pressure notch and the driving notch 3 are located on different sides of the pump body 1. A pressure relief channel is formed on the pump body 1. One end of the pressure relief channel is formed in the driving notch 3, and the other end is formed on the pressure relief notch 4.

[0017] A pressure relief notch 5 is provided on the aforementioned pump body 1, and a pressure relief notch 4 is opened on the pressure relief notch 5. It should be noted that Figure 2 schematically shows a sectional structure of a vacuum pump with a pressure relief passage, as Figure 2 shown. The aforementioned pressure relief passage includes a first pressure relief passage 6 and a second pressure relief passage 7. The first pressure relief passage 6 penetrates the side wall of the driving notch 3 and the pressure relief notch 5 along the width direction of the pressure relief notch 5. A break opening of the first pressure relief passage 6 opened on the driving notch 3 communicates with the pump chamber. The second pressure relief passage 7 penetrates the side wall of the pressure relief notch 4 and the pressure relief notch 5 along the height direction of the pressure relief notch 5. The aforementioned first pressure relief passage 6 and the second pressure relief passage 7 are in communication, so that the first pressure relief passage 6 and the second pressure relief passage 7 are connected to form a pressure relief passage from the driving notch 3 to the pressure relief notch 4, completing the pressure relief inside the pump chamber.

[0018] The aforementioned first pressure relief passage 6 and the second pressure relief passage 7 are in a communicating state. Since the first pressure relief passage 6 penetrates the side wall of the driving notch 3 and the pressure relief notch 5 along the width direction of the pressure relief notch 5, a slot hole is opened on the side surface of the pressure relief notch 5 of the first pressure relief passage 6. The second pressure relief passage 7 penetrates the side wall of the pressure relief notch 4 and the pressure relief notch 5 along the height direction of the pressure relief notch 5, so that a slot hole is opened on the top side of the pressure relief notch 5 of the second pressure relief passage 7. Since the outlet of the pressure relief passage is located at the pressure relief notch 4, the aforementioned slot holes need to be closed to form a pressure relief passage composed of the first pressure relief passage 6 and the second pressure relief passage 7. The method adopted is to provide a plug ball 8 for blocking the first pressure relief passage 6 at one end of the first pressure relief passage 6 away from the driving notch 3, and a plug ball 8 for blocking the second pressure relief passage 7 at one end of the second pressure relief passage 7 away from the pressure relief notch 4, forming a pressure relief passage that enters from the driving notch 3, then passes through the junction of the first pressure relief passage 6 and the second pressure relief passage 7, and thus is discharged from the driving notch 3. It should be noted that the aforementioned first pressure relief passage 6 and the second pressure relief passage 7 can adopt a vertical through or inclined through manner based on the pressure relief notch 5, depending on the shape of the pump chamber and the pressure relief notch 5.

[0019] In some embodiments, the pressure relief passage can be formed by combining at least two pressure relief passages in different directions in a through manner, and the ends of the pressure relief passages close to the through point are closed with plugs to form a corner. The oil seal inner side of the driving end of the vacuum pump and the pressure relief notch 5 located on the fixed shaft seat are connected through multiple pressure relief passages and corners; and the aforementioned pressure relief passage can adopt a through manner including but not limited to vertical through to form a corner, as long as the through between the pressure relief passages in different directions can be maintained. It is set according to the surface structure of the pump body 1. Vertical through is only one of the implementation manners of the present invention.

[0020] For the convenience of fixing the vacuum pump, a number of fixing notches 9 for fixing the vacuum pump may be provided through the width direction of the pressure relief notch 5. Bolts can pass through the aforementioned fixing notches 9 to fix the vacuum pump body 1. The pressure relief notch 4 is an annular notch opened above the pressure relief notch 5 and is opened on the outer edge of the pump body 1.

[0021] Through the pressure relief channel provided on the pump body, based on the shape and structure of the pump body, the pressure relief channel communicates the inner side of the oil seal at the driving end of the pump body with the outside world, meets the pressure relief requirement when the pressure inside the oil seal at the driving end is too high, prevents the occurrence of oil leakage, thus avoids the abnormal noise problem of the vacuum pump, improves the service life of the vacuum pump, and ensures its stable operation.

[0022] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A vacuum pump with a pressure relief channel, comprising a pump body (1), a pump cover (2), and a rotor in a pump chamber formed by enclosing the pump body (1) and the pump cover (2), characterized in that, A driving notch (3) for driving the rotor is formed on the pump body (1), and a pressure relief notch (4) is formed on the pump body (1). The pressure relief notch (4) and the driving notch (3) are located on different sides of the pump body (1). A pressure relief channel is formed on the pump body (1). One end of the pressure relief channel is formed in the driving notch (3), and the other end is formed on the pressure relief notch (4).

2. The vacuum pump with a pressure relief passage according to claim 1, wherein A fixed shaft seat (5) is arranged on the pump body (1). The pressure relief notch (4) is formed on the fixed shaft seat (5). The pressure relief channel includes a first pressure relief channel (6) and a second pressure relief channel (7). The first pressure relief channel (6) penetrates through the driving notch (3) and the fixed shaft seat (5) along the width direction of the fixed shaft seat (5). The second pressure relief channel (7) penetrates through the pressure relief notch (4) and the fixed shaft seat (5) along the height direction of the fixed shaft seat (5), and the first pressure relief channel (6) communicates with the second pressure relief channel (7).

3. The vacuum pump having a pressure relief passage according to claim 2, wherein, A blocking ball (8) for blocking the first pressure relief channel (6) is arranged at one end of the first pressure relief channel (6) away from the driving notch (3).

4. The vacuum pump with a pressure relief passage according to claim 3, wherein A blocking ball (8) for blocking the second pressure relief channel (7) is arranged at one end of the second pressure relief channel (7) away from the pressure relief notch (4).

5. The vacuum pump having a pressure relief passage according to claim 2, wherein, The first pressure relief channel (6) and the second pressure relief channel (7) are vertically communicated.

6. The vacuum pump with a pressure relief passage according to claim 2, wherein A plurality of fixing notches (9) for fixing a vacuum pump are formed through the width direction of the fixed shaft seat (5).

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