Rotary shaft sealing method and sealing structure of gearbox
A technology of sealing structure and rotating shaft, which is applied in belts/chains/gears, transmission parts, mechanical equipment, etc., can solve problems such as leakage failure, and achieve the effect of eliminating leakage failure of conventional gap seals
Active Publication Date: 2016-07-06
CHANGZHOU RUITAI ENG MASCH CO LTD +1
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Problems solved by technology
When there is negative pressure outside the seal caused by other reasons (such as high-speed rotation of large-diameter parts), there is still a risk of leakage failure
Method used
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Embodiment Construction
[0017] Such as figure 1 , 2 As shown, in a method for sealing the rotating shaft of a gear box of the present invention, a suspended partition 4 is set between the sealing end cover 7 fixed on the box body 8 and the rotating body 1 fixed on the outer end of the rotating shaft 2, and the suspended A normal pressure zone a is formed between one side of the partition 4 and the sealing end cover 7, and the air in the periphery a-1 of the normal pressure zone communicates with the air in the center a-2 of the normal pressure zone a; the other part of the suspended partition 4 A variable pressure zone d is formed between one side and the rotating body 1, the air in the normal pressure zone a and the air in the variable pressure zone d pass through the peripheral space of the suspended partition 4 and the gap between the inner hole of the suspended partition 4 and the rotating shaft 2 c communicates, so that the internal and external air pressure of the gap seal b between the rotati...
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The invention discloses a rotating shaft sealing method of a gear box and a sealing structure thereof. The rotating shaft sealing method of the gear box comprises that a dangling partition board is arranged between a sealing end cover fixed on a box body and a rotating body fixed at the outer end of a rotating shaft, a normal pressure zone is formed between one side of the dangling partition board and the sealing end cover, and peripheral air of the normal pressure zone and air in the center of the normal pressure zone are communicated; a variable pressure zone is formed between the other side of the dangling partition board and the rotating body and air in the normal pressure zone and the variable pressure zone is communicated with gaps between the rotating shafts through periphery space and inner holes of the dangling partition board, so that gap-sealing inner and outer air pressure between the rotating shafts and the sealing end cover can maintain balanced. The sealing structure comprises a box body, the sealing end cover, the rotating shaft and the rotating body. The rotating shaft sealing method and the sealing structure can eliminate differential pressures and avoid leakage and failure of gap sealing of the gear box.
Description
technical field [0001] The invention relates to a rotating shaft seal of a gear box, in particular to a method for sealing a gap of a rotating part and a sealing structure thereof. Background technique [0002] Due to design requirements, the high-speed shaft of the gearbox needs to be connected with a brake disc with a larger diameter on the whole machine, but due to the limited installation space, the distance between the brake disc and the high-speed shaft end cover (corresponding to the opening position of the high-speed shaft gap seal) Very small, such as a megawatt-class wind power machine, the brake disc has a diameter of 930mm. After being installed on the high-speed shaft of the wind power gearbox, the distance from the high-speed shaft end cover is only about 140mm. During the use of the whole machine, the high-speed rotation of the high-speed shaft drives the brake disc to rotate at a high speed. Affected by the centrifugal force of the brake disc and the Bernoull...
Claims
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IPC IPC(8): F16H57/029
CPCF16H57/029
Inventor 王志勇徐佳宁张亚楠黎康康郭友超符嘉靖付传锋
Owner CHANGZHOU RUITAI ENG MASCH CO LTD