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Patent Searching and Data


Title:
MECHANICAL SEAL HAVING AUXILIARY LUBRICATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/095950
Kind Code:
A1
Abstract:
A mechanical seal having an auxiliary cooling and lubricating device, comprising a moving ring (9), a stationary ring (8), a moving ring driving sleeve (7), a stationary ring retainer (5), a water seal seat ring (1), a wave spring (3), a retaining ring (2), a corrugated pipe (4) and a moving ring pad (10); the moving ring driving sleeve (7) is fixed on a shaft, the shaft driving the moving ring driving sleeve (7) to rotate; the moving ring driving sleeve (7) is provided thereon with multiple blades (6), the blades (6) spinning a cooling medium around the mechanical seal toward the contact area of a friction pair while the moving ring driving sleeve (7) drives the moving ring (9) to rotate so as to guarantee that the friction pair is constantly in a lubricating and cooling state; meanwhile, the moving ring driving sleeve (7) is provided by means of a variable diameter design with transitions steps, and multiple windows are provided at end faces of the steps; the variable diameter of the moving ring sleeve (7) satisfies a function of driving the moving ring (9), while also partially and directly exposing the moving ring (9) in a cooling liquid so as to help cool the moving ring (9); the windows at the end faces of the steps are first used for forming driving claws while helping to circulate a cooling liquid that is surrounded by the blades (6) and that is located around the water seal as well as the cooling liquid at the periphery such that temperature remains stable around the water seal. By means of the mechanical seal, the temperature of a friction pair may be rapidly reduced to prevent seal failure that is caused by the ablation of an auxiliary sealing rubber member due to dry friction, thereby extending the service life of the mechanical seal, and solving the problem of noise for the mechanical seal.

Inventors:
MAO WEI (CN)
Application Number:
CN2018/111677
Publication Date:
May 23, 2019
Filing Date:
October 24, 2018
Export Citation:
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Assignee:
BEIJING GERUIFU M S T CO LTD (CN)
International Classes:
F16J15/34
Foreign References:
CN207500480U2018-06-15
CN107654655A2018-02-02
DE20302182U12003-06-05
CN104061328A2014-09-24
CN206555446U2017-10-13
US5660521A1997-08-26
JPH11315935A1999-11-16
Attorney, Agent or Firm:
BEIJING SHENGFANZHIRONG INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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