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CN-224214321-U - Shaft seal sealing structure without shaft seal check ring and automobile air conditioner compressor thereof

CN224214321UCN 224214321 UCN224214321 UCN 224214321UCN-224214321-U

Abstract

The utility model provides a seal structure of shaft seal of no axle seal retaining ring and vehicle air conditioner compressor thereof, wherein seal structure of shaft seal of no axle seal retaining ring includes protecgulum, bearing seal, main shaft, cylinder body and back lid, and the main shaft runs through in protecgulum, bearing seal, cylinder body and back lid, and protecgulum and back lid are installed respectively around the cylinder body, and the back lid is connected to the main shaft rear end; the front end of the main shaft is fixed in a shaft diameter end hole of the front cover; three sections of hole sections with different inner diameters exist in the shaft diameter end hole of the front cover, the opening part of the shaft diameter end hole to the inner side comprises a third hole section, a second hole section and a first hole section, and the inner diameter of the first hole section is that The inner diameter of the second hole section is The inner diameter of the third hole section is The shaft seal is assembled in the first bore section. The utility model solves the problem of how to reduce the cost of the bidirectional compressor in the prior art.

Inventors

  • ZHU XIAOXIA

Assignees

  • 上海北特光裕新能源科技有限公司

Dates

Publication Date
20260508
Application Date
20250527

Claims (4)

  1. 1. A shaft seal sealing structure without a shaft seal check ring is characterized by comprising a front cover (1), a shaft seal (2), a main shaft (4), a cylinder body (5) and a rear cover (7), wherein the main shaft (4) penetrates through the front cover (1), the shaft seal (2), the cylinder body (5) and the rear cover (7), the front cover (1) and the rear cover (7) are respectively arranged on the front and rear sides of the cylinder body (5), the rear end of the main shaft (4) is connected with the rear cover (7), and the front end of the main shaft (4) is fixed in a shaft diameter end hole (1-7) of the front cover (1); Three sections of hole sections with different inner diameters exist in the shaft diameter end hole (1-7) of the front cover (1), a third hole section, a second hole section and a first hole section are contained from the opening part of the shaft diameter end hole (1-7) to the inner side, the inner diameter of the first hole section is ∅ a, the inner diameter of the second hole section is ∅ b, the inner diameter of the third hole section is ∅ c, ∅ b < ∅ c < ∅ a, and the shaft seal (2) is assembled in the first hole section.
  2. 2. The shaft seal sealing structure without the shaft seal retainer ring according to claim 1, wherein the shaft seal (2) is reversely assembled in the first hole section, and the protruding part (2-1) of the shaft seal (2) is embedded in the second hole section.
  3. 3. An automobile air conditioner compressor is characterized by comprising a shaft seal sealing structure without a shaft seal check ring, which is disclosed in the claim 1 or 2, wherein a front sealing gasket and a valve plate component (3) are arranged between a front cover (1) and a cylinder body (5), and a rear sealing gasket and a valve plate component (6) are arranged between a rear cover (7) and the cylinder body (5).
  4. 4. A compressor for an air conditioner of an automobile according to claim 3, wherein a first low-pressure cavity (1-3), an oil hole (1-5) and a second low-pressure cavity (1-4) are arranged in the front cover (1), the first low-pressure cavity (1-3) is communicated with the second low-pressure cavity (1-4) through the oil hole (1-5), and the shaft seal (2) is arranged in the second low-pressure cavity (1-4).

Description

Shaft seal sealing structure without shaft seal check ring and automobile air conditioner compressor thereof Technical Field The utility model relates to the technical field of automobile air conditioner compressors, in particular to a shaft seal sealing structure without a shaft seal check ring and an automobile air conditioner compressor thereof. Background At present, with the development of the economic society of China and the improvement of the living standard of people, the automobile is more and more reserved in the whole country, the automobile market cost control form is more and more severe, and the tendency of automobile selling price is reduced. The compressor is used as a core component of an automobile air conditioning system, is an essential main component of an automobile, and has increasingly improved control requirements on cost on the premise of ensuring the reliability of the compressor. The prior two-way compressor has mature structure and difficult cost reduction, the prior two-way compressor uses a compressor with a shaft seal retainer ring 8 (see fig. 1 and 2), the opening part of the shaft diameter end holes 1-7 of the front cover 1 to the inner side comprises a third hole section, a second hole section and a first hole section, and the inner diameter of the first hole section is thatThe inner diameter of the second hole section isThe inner diameter of the third hole section isThe shaft seal 2 is fitted in the second bore section, and the protruding part 2-1 of the shaft seal 2 is now embedded in the first bore section, which is called "positive pressure fitting", i.e. the protruding part 2-1 of the shaft seal 2 is directed towards the cylinder 5. When the shaft seal 2 is under pressure, if the shaft seal retainer 8 is not arranged, the shaft seal 2 is flushed out by the air pressure in the low-pressure cavity 1-4, so that the front cover 1 is provided with a front cover retainer groove 1-1 for assembling the shaft seal retainer 8. The existing bidirectional compressor can effectively reduce the cost if parts can be reduced, so that how to reduce the cost of the bidirectional compressor becomes the technical problem to be solved. Disclosure of utility model The utility model aims to provide a shaft seal sealing structure without a shaft seal check ring and an automobile air conditioner compressor thereof, and mainly solves the problem of how to reduce the cost of a bidirectional compressor in the prior art. In order to achieve the aim, the technical scheme adopted by the utility model is that the shaft seal sealing structure of the shaft seal-free check ring is characterized in that the shaft seal sealing structure of the shaft seal-free check ring comprises a front cover, a shaft seal, a main shaft, a cylinder body and a rear cover, wherein the main shaft penetrates through the front cover, the shaft seal, the cylinder body and the rear cover, the front cover and the rear cover are respectively arranged at the front and the rear of the cylinder body, and the rear end of the main shaft is connected with the rear cover; Three sections of hole sections with different inner diameters exist in the shaft diameter end hole of the front cover, the opening part of the shaft diameter end hole to the inner side comprises a third hole section, a second hole section and a first hole section, and the inner diameter of the first hole section is that The inner diameter of the second hole section isThe inner diameter of the third hole section isThe shaft seal is assembled in the first bore section. Further, the shaft seal is reversely assembled in the first hole section, and the protruding part of the shaft seal is embedded in the second hole section. A compressor of an automobile air conditioner is characterized by comprising the shaft seal sealing structure without a shaft seal check ring, wherein a front sealing gasket and a valve plate component are arranged between a front cover and a cylinder body, and a rear sealing gasket and a valve plate component are arranged between a rear cover and the cylinder body. Further, set up first low pressure chamber, oilhole and second low pressure chamber in the protecgulum, first low pressure chamber passes through oilhole intercommunication second low pressure chamber, and the bearing seal is located the second low pressure intracavity. In view of the technical characteristics, the utility model has the following beneficial effects: 1. The utility model relates to a shaft seal sealing structure without a shaft seal retainer ring and an automobile air conditioner compressor thereof, wherein three sections of hole sections with different inner diameters exist in a shaft diameter end hole of a front cover in the shaft seal sealing structure, a third hole section, a second hole section and a first hole section are respectively arranged from an opening part of the shaft diameter end hole of the front cover to the inner side, and the inner diameter of the first