Dynamic pressure balance rotary sealing part

A rotary seal and dynamic pressure balance technology, applied in the field of high-pressure high-speed rotary seals, rotary seals, can solve the problems of poor adaptability and followability, and achieve the effects of strong designability, good sealing reliability, and long service life
CN104534097AActive Publication Date: 2015-04-22NO 53 RES INST OF CHINA NORTH IND GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NO 53 RES INST OF CHINA NORTH IND GRP
Publication Date
2015-04-22

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Abstract

The invention belongs to the technical field of sealing and discloses a dynamic pressure balance rotary sealing part. The pressure borne by a second sealing lip is reduced based on a spiral sealing principle and through the pumping function on fluid arranged in sealing gaps in a filling mode in the rotating process, and reliable sealing under the high-pressure and high-speed sealing working condition is achieved through coordination of multiple sealing. The dynamic pressure balance rotary sealing part is of a double-lip sealing structure and is composed of a rigid sealing ring (1) and an oil seal (2). The dynamic pressure balance rotary sealing part is characterized in that the sealing face of the rigid sealing ring (1) is provided with a backflow groove (3), a sealing gap is not larger than 1 mm, and the rigid sealing ring is located on the oil side. The sealing part is high in designability, good in sealing reliability, long in service life, suitable for high-pressure rotary sealing occasions, particularly suitable for high-speed and high-pressure rotary sealing of shafts / cylinders and suitable for reliable sealing of 0.05 MPa-2 MPa and 10 m / s-40 m / s rigorous working conditions.
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Description

technical field

[0001] The invention belongs to the technical field of sealing, and relates to a rotary sealing technology, in particular to a high-pressure high-speed rotary sealing technology. Background technique

[0002] The rotary shaft oil seal generally includes a flexible rubber lip, a skeleton and a spring. The flexible rubber lip has an interference fit with the sealing shaft. The spring provides a stable radial force. The sealing lip exerts a tight force on the rotary shaft to prevent fluid leakage. The oil seal can also prevent the intrusion of external dust. The oil seal has a metal skeleton, which is used for the stability and fastening of the seal. The oil seal plays an important role in the reliability of the equipment power and transmission system.

[0003] Generally, the oil seal has poor pressure bearing capacity, and the oil seal is deformed when the pressure is too high, so a pressure-resistant support ring or a reinforced pressure-resistant oil seal is...

Claims

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