Shaft seal leakage-proof structure

Abstract

The utility model relates to a shaft seal leakproof structure, which is applied to an air compressor and comprises a casing, a projecting shaft, a bearing, a shaft seal lip, a shaft seal cover, a first oil storage tank, an oil return hole and a second oil storage tank, a first shaft hole is arranged at one end of the casing, and the projecting end of the projecting shaft penetrates through and protrudes out of the first shaft hole. A bearing is arranged between the extending end and the first shaft hole, a shaft seal cover is arranged between the outer end of the extending end and the outer side of the first shaft hole, a second shaft hole is formed in the shaft seal cover, the extending end penetrates through and protrudes out of the second shaft hole, a shaft seal lip is arranged between the second shaft hole and the extending end, and the first oil storage groove and the oil return hole are both formed in the bottom of the first shaft hole. The first oil storage groove is communicated with the oil return hole, the oil return hole is communicated with the interior of the machine shell, the second oil storage groove is formed in the bottom end face, close to the bearing, of the shaft seal cover, and the first oil storage groove is communicated with the second oil storage groove. The shaft seal leakage-proof structure enables redundant lubricating oil in the bearing to be stored and discharged into the machine shell, and oil leakage of the shaft seal is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a shaft seal anti-leakage structure. Background Art

[0002] Due to the cost and size limitations of the air compressor, the end seal structure extending out of the shaft 1 in the shaft seal structure has a small design space, and the distance between the shaft seal lip 3 and the bearing 2 is small ( Figure 1 ), the oil storage space is small, resulting in a large amount of bearing lubricating oil concentrated at the shaft seal, so that the shaft seal lip 3 is immersed in the lubricating oil. As the pressure in this space gradually increases, the shaft seal lip 3 is subjected to greater pressure, causing the shaft seal to leak oil easily. Utility Model Content

[0003] The utility model aims to provide a shaft seal anti-leakage structure to solve the defect that the shaft seal is easy to leak oil due to the small distance between the shaft seal lip and the bearing of the air compressor in the prior art.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a shaft seal anti-leakage structure, which is applied to an air compressor, and is characterized in that the shaft seal anti-leakage structure comprises a casing, an extended shaft, a bearing, a shaft seal lip, a shaft seal cover, a first oil storage tank, an oil return hole, and a second oil storage tank, wherein a first shaft hole is arranged at one end of the casing, the extended end of the extended shaft is penetrated in and protrudes out of the first shaft hole, the bearing is arranged between the extended end and the first shaft hole, the shaft seal cover is arranged between the outer end of the extended end and the outer side of the first shaft hole, a second shaft hole is arranged on the shaft seal cover, the extended end is penetrated in and protrudes out of the second shaft hole, the shaft seal lip is arranged between the second shaft hole and the extended end, the first oil storage tank and the oil return hole are both arranged at the bottom of the first shaft hole, the first oil storage tank and the oil return hole are communicated, the oil return hole is communicated with the inside of the casing, the second oil storage tank is arranged at the bottom end surface of the shaft seal cover close to the bearing, and the first oil storage tank and the second oil storage tank are communicated.

[0006] Preferably, the first oil storage tank and the second oil storage tank are arranged opposite to each other.

[0007] Preferably, the oil return hole is arranged at the bottom of the first oil storage tank.

[0008] Preferably, a cross-sectional area of ​​the first oil storage tank is smaller than a cross-sectional area of ​​the second oil storage tank.

[0009] Preferably, the second oil storage tank is a square tank.

[0010] Preferably, the first oil storage tank is a U-shaped tank.

[0011] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0012] The positive progressive effect of the utility model is that the shaft seal anti-leakage structure of the utility model is provided with a first oil storage tank and an oil return hole on the casing, and a second oil storage tank is provided on the shaft seal cover, so that the excess lubricating oil in the bearing is concentrated in the first oil storage tank and the second oil storage tank, so that the shaft seal lip is in a suitable low-oil state, and the oil return hole enables the high-pressure oil to be discharged into the casing in time, so that the shaft seal lip is in a suitable low-pressure state, which greatly reduces the risk of shaft seal oil leakage, and at the same time enables the lubricating oil to be recycled and resources are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a shaft sealing structure of the background technology of the utility model.

[0014] Figure 2 It is a cutaway schematic diagram of the shaft seal anti-leakage structure of the utility model.

[0015] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure of part A.

[0016] Figure 4 It is a schematic cross-sectional view of the second oil storage tank of the utility model.

[0017] Figure 5 It is a structural schematic diagram of the second oil storage tank of the utility model.

[0018] Figure 6 It is a partial structural schematic diagram of the first oil storage tank of the utility model.

[0019] Description of reference numerals:

[0020] Extend shaft 1

[0021] Bearing 2

[0022] Shaft seal lip 3

[0023] Shaft seal cover 4

[0024] Second shaft hole 41

[0025] Second oil storage tank 42

[0026] Case 5

[0027] First shaft hole 51

[0028] First oil storage tank 52

[0029] Oil return hole 53 DETAILED DESCRIPTION

[0030] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0031] The utility model discloses a shaft seal anti-leakage structure, which is applied to air compressors, such as Figure 1-6 As shown, the shaft seal leakage prevention structure includes a casing 5, an extended shaft 1, a bearing 2, a shaft seal lip 3, a shaft seal cover 4, a first oil storage tank 52, an oil return hole 53 and a second oil storage tank 42. A first shaft hole 51 is arranged at one end of the casing 5, the extended end of the extended shaft 1 is penetrated through and protrudes out of the first shaft hole 51, a bearing 2 is arranged between the extended end and the first shaft hole 51, a shaft seal cover 4 is arranged between the outer end of the extended end and the outer side of the first shaft hole 51, a second shaft hole 41 is arranged on the shaft seal cover 4, the extended end is penetrated through and protrudes out of the second shaft hole 41, a shaft seal lip 3 is arranged between the second shaft hole 41 and the extended end, the first oil storage tank 52 and the oil return hole 53 are both arranged at the bottom of the first shaft hole 51, the first oil storage tank 52 and the oil return hole 53 are connected, the oil return hole 53 is connected with the inside of the casing 5, the second oil storage tank 42 is arranged on the bottom end surface of the shaft seal cover 4 close to the bearing 2, and the first oil storage tank 52 and the second oil storage tank 42 are connected.

[0032] Specifically, one end of the extended shaft 1 of the air compressor is arranged in the casing 5, and the other end of the extended shaft 1 extends out of the casing 5. A first shaft hole 51 is arranged at the end of the casing 5 along the extension direction of the extended shaft 1, and a bearing 2 is arranged between the extended end of the extended shaft 1 and the first shaft hole 51. A shaft seal cover 4 is arranged at the outer end of the casing 5 for sealing the shaft, and a second shaft hole 41 is arranged in the shaft seal cover 4, and a shaft seal lip 3 is used to seal between the extended end and the second shaft hole 41. A first oil storage tank 52 and an oil return hole 53 are arranged at the bottom of the casing 5, and a second oil storage tank 42 is arranged at the bottom of the shaft seal cover 4, so that the excess lubricating oil in the bearing 2 is concentrated in the first oil storage tank 52 and the second oil storage tank 42, so that the shaft seal lip 3 is in a suitable low-oil state, and the oil return hole 53 allows the high-pressure oil to be discharged into the casing 5 in time, so that the shaft seal lip 3 is in a suitable low-pressure state, which greatly reduces the risk of oil leakage from the shaft seal, and at the same time enables the lubricating oil to be recycled and resource-saving. During operation, the lubricating oil flows downward from the shaft seal lip 3, the bearing 2, etc., and is quickly and efficiently stored in the first oil storage tank 52 and the second oil storage tank 42. Under high pressure, the lubricating oil is recovered into the casing 5 through the oil return hole 53 under gravity and pressure for utilization.

[0033] In this embodiment, the first oil storage tank 52 and the second oil storage tank 42 are disposed opposite to each other.

[0034] Specifically, the first oil storage tank 52 is arranged at the bottom of the outer end surface of the first shaft hole 51, and the second oil storage tank 42 is arranged at the bottom of the inner end surface of the second shaft hole 41, and the first oil storage tank 52 and the second oil storage tank 42 are arranged opposite to each other to form a larger oil storage space, thereby increasing the oil storage capacity. Combined with the oil return hole 53, the high-pressure oil can be discharged into the casing 5 in time, thereby reducing the risk of oil leakage from the shaft seal.

[0035] In this embodiment, the oil return hole 53 is disposed at the bottom of the first oil storage tank 52 .

[0036] Specifically, the oil return hole 53 is disposed at the bottom of the first oil storage tank 52 , so that the lubricating oil in the first oil storage tank 52 can return to the housing 5 in a timely, convenient and fast manner under the action of gravity.

[0037] In this embodiment, the cross-sectional area of ​​the first oil storage tank 52 is smaller than the cross-sectional area of ​​the second oil storage tank 42 .

[0038] Specifically, the width and height of the first oil storage tank 52 are smaller than the height and width of the second oil storage tank 42, which ensures the working space of the bearing 2, and fully and effectively utilizes the larger space of the shaft seal cover 4 to set the larger second oil storage tank 42, thereby reducing the risk of oil leakage from the shaft seal. In addition, under high pressure, the cross-sectional area of ​​the first oil storage tank 52 is smaller, so that the lubricating oil pressure is higher and it is easier to discharge.

[0039] In this embodiment, the second oil storage tank 42 is a square tank.

[0040] Specifically, the second oil storage tank 42 is a square tank, which is convenient for production and cleaning, and fully and effectively utilizes the larger space of the shaft seal cover 4 .

[0041] In this embodiment, the first oil storage tank 52 is a U-shaped tank.

[0042] Specifically, the first oil storage tank 52 is a U-shaped tank, so that the excess lubricating oil of the bearing 2 can be stored quickly and efficiently. Under high pressure, the lubricating oil can flow back to the housing 5 more quickly through the oil return hole 53. In addition, the U-shaped tank has a simple structure and is easy to produce.

[0043] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A shaft seal anti-leakage structure, applied to an air compressor, characterized in that: The shaft seal leakage prevention structure includes a casing, an extended shaft, a bearing, a shaft seal lip, a shaft seal cover, a first oil storage tank, an oil return hole and a second oil storage tank, a first shaft hole is arranged at one end of the casing, the extended end of the extended shaft is passed through and protrudes out of the first shaft hole, the bearing is arranged between the extended end and the first shaft hole, the shaft seal cover is arranged between the outer end of the extended end and the outer side of the first shaft hole, a second shaft hole is arranged on the shaft seal cover, the extended end is passed through and protrudes out of the second shaft hole, the shaft seal lip is arranged between the second shaft hole and the extended end, the first oil storage tank and the oil return hole are both arranged at the bottom of the first shaft hole, the first oil storage tank and the oil return hole are connected, the oil return hole is connected with the inside of the casing, the second oil storage tank is arranged at the bottom end surface of the shaft seal cover close to the bearing, and the first oil storage tank and the second oil storage tank are connected.

2. The shaft seal anti-leakage structure according to claim 1, characterized in that: The first oil storage tank and the second oil storage tank are arranged opposite to each other.

3. The shaft seal anti-leakage structure according to claim 1, characterized in that: The oil return hole is arranged at the bottom of the first oil storage tank.

4. The shaft seal anti-leakage structure according to claim 1, characterized in that: A cross-sectional area of ​​the first oil storage tank is smaller than a cross-sectional area of ​​the second oil storage tank.

5. The shaft seal anti-leakage structure according to claim 1, characterized in that: The second oil storage tank is a square tank.

6. The shaft seal anti-leakage structure according to claim 1, characterized in that: The first oil storage tank is a U-shaped tank.

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