CN217328464U

CN217328464U - Combined type bull spiral atmospheric pressure seal structure

Info

Publication number: CN217328464U
Application number: CN202122476566.XU
Authority: CN
Inventors: 李硕; 黄莹莹; 高旭文; 张超; 安文迪; 左晓镭; 王苏鸣; 王勇帆
Original assignee: Harbin Guanghan Power Transmission Co ltd
Current assignee: Harbin Guanghan Power Transmission Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-08-30
Anticipated expiration: 2031-10-14

Abstract

An object of the utility model is to provide a combined type bull spiral atmospheric pressure seal structure, including the bearing seal body, set up bearing seal body labyrinth seal part on the bearing seal body, bearing seal body bull spiral seal part, separate through deep groove oil groove between the labyrinth seal of bearing seal body labyrinth seal part, deep groove oil groove below sets up side oilhole oil return passageway, bearing seal body bull spiral seal part is located the extreme of bearing seal body, the extreme department of bearing seal body sets up spiral seal part oil return passageway, side oilhole oil return passageway and spiral seal part oil return passageway all access to bearing seal body front end. The utility model discloses utilize bull spiral seal structure and the relative high-speed rotation of transmission shaft to form pneumatic pressure to there is pressure differential all the time inside and outside making seal structure, produce the gaseous external leakage of axial direction of following of gas flow reduction vapour, combine labyrinth seal and oil scraper ring can effectually prevent the lubricating oil seepage phenomenon of high linear speed gear box simultaneously.

Description

Combined type bull spiral atmospheric pressure seal structure

Technical Field

The utility model relates to a seal structure, specifically speaking are gear seal structure.

Background

In a general high-speed gear device, the high linear speed of a gear causes higher air pressure in a gear box, and when the gear device runs under a continuous operation working condition, more oil mist and oil gas are generated in the gear box due to splashing of the gear and a bearing, so that the oil leakage phenomenon is easy to generate. Meanwhile, when designing the shafting of the high-speed gearbox, the layout of the shafting arrangement form is often compact due to consideration of the critical rotating speed problem of the high-speed shafting, so that the axial distance between the sliding bearing and the shaft seal is close, lubricating oil splashed by a side gap of the sliding bearing is concentrated on a large amount of lubricating oil through injection, reflection and the like and falls onto the shaft diameter, the phenomenon of 'crawling' of the lubricating oil on the shaft diameter is easily generated, and the lubricating oil leakage phenomenon is caused.

Disclosure of Invention

An object of the utility model is to provide a mainly reduce fluid through pneumatic pressure and leak a combined type bull spiral atmospheric pressure seal structure to the outside along axial direction.

The purpose of the utility model is realized like this:

the utility model relates to a combined type bull spiral atmospheric pressure seal structure, characterized by: the multi-head spiral sealing part of the shaft seal body is positioned at the tail end of the shaft seal body, the tail end of the shaft seal body is provided with a spiral sealing part oil return passage, and the square oil hole oil return passage and the spiral sealing part oil return passage are both led to the front end of the shaft seal body.

The utility model discloses can also include:

1. two layers of oil slingers are arranged at the front end of the shaft seal body, and positioning gaskets are arranged between the two layers of oil slingers and between the inner layer of oil slinger and the shaft seal body.

2. The number of spiral heads of the multi-head spiral sealing part of the shaft seal body is 10-20, the thread pitch is 3-8 mm, and the radius clearance between the multi-head spiral sealing part of the shaft seal body and the gear shaft is 0.001-0.002 times of the diameter of the gear shaft.

The utility model has the advantages that: the utility model discloses utilize bull spiral seal structure and the relative high-speed rotation of transmission shaft to form pneumatic pressure to there is pressure differential all the time inside and outside making seal structure, produce the gaseous external leakage of axial direction of following of gas flow reduction vapour, combine labyrinth seal and oil scraper ring can effectually prevent the lubricating oil seepage phenomenon of high linear speed gear box simultaneously.

Drawings

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be described in more detail below by way of example with reference to the accompanying drawings:

combine fig. 1-2, the utility model discloses by oil slinger 11, fixing bolt 12, positioning washer 13, bearing seal body labyrinth seal part 14, bearing seal body bull spiral seal part 15 constitute, oil slinger 11 installs on the inboard terminal surface of bearing seal is close to the bearing seal body, separates oil slinger 11 and bearing seal body terminal surface by positioning washer 13, and oil slinger 11's internal diameter and the cooperation of the epaxial surface guarantee less clearance value in order to block that the lubricating oil splashes, reveals. The shaft seal body 4/5 is made of aluminum alloy, its sealing type labyrinth seal 14 is combined with multi-head spiral seal 15, the labyrinth seals are separated by deep groove oil groove, and return oil via oil hole under the deep groove oil groove, the horizontal oil return hole is inclined hole type with certain angle, which is convenient for oil return. The multi-head spiral seal 15 is of an endmost structure, and the adopted spiral seal structure with more than ten heads can form enough internal and external pressure difference under the condition of high linear speed to generate pneumatic pressure flow so as to prevent a large amount of lubricating oil splashed by the side gap of the sliding bearing 1 from falling on the shaft 2 to generate a lubricating oil crawling phenomenon to cause oil leakage.

The two oil slingers 11 can primarily block leaked lubricating oil, so that the amount of the lubricating oil leaked to the shaft seal is reduced; the shaft seal body mainly comprises labyrinth seals 14 and multi-head spiral seals 15, the labyrinth seals 14 are separated by a machinable deep oil groove, so that the maximum shafting oil gas velocity attenuation is achieved, and the shafting oil return is more effective by utilizing gravity component in an inclined hole type oil return mode; the multi-head spiral sealing screw pitch arranged at the tail end of the shaft seal is 3-8 mm, the number of the spiral heads is 10-20, and the pneumatic dynamic pressure is generated, so that gas flowing from the outside to the inside of the shaft seal is formed, and the lubricating oil leakage caused by the phenomenon of 'creeping' of the lubricating oil on the shaft diameter is reduced and inhibited. The multiple components are connected and combined into a whole through the bolts and the gaskets, the processing is simple, and the flexible installation or the transformation of the shaft seal on the transmission device with the oil leakage phenomenon is facilitated. Therefore, the utility model has the characteristics of compact structure, assembly are nimble, the oil blanket is effectual, do benefit to project transformation etc.

The radial clearance between the spiral seal and the gear shaft is 0.001-0.002 times the diameter of the gear shaft.

Claims

1. The utility model provides a combined type bull spiral atmospheric pressure seal structure which characterized by: including the bearing seal body, set up bearing seal body labyrinth seal part, the bull spiral seal part of bearing seal body on the bearing seal body, separate through deep groove oil groove between the labyrinth seal of bearing seal body labyrinth seal part, deep groove oil groove below sets up side oilhole oil return passageway, bearing seal body bull spiral seal part is located the very end of bearing seal body, the very end of bearing seal body sets up spiral seal part oil return passageway, side oilhole oil return passageway and spiral seal part oil return passageway all lead to bearing seal body front end.

2. The composite multi-head spiral air pressure sealing structure of claim 1, which is characterized in that: two layers of oil slingers are arranged at the front end of the shaft seal body, and positioning gaskets are arranged between the two layers of oil slingers and between the inner layer of oil slinger and the shaft seal body.

3. The composite multi-head spiral air pressure sealing structure according to claim 1 or 2, wherein: the number of spiral heads of the multi-head spiral sealing part of the shaft seal body is 10-20, the thread pitch is 3-8 mm, and the radius clearance between the multi-head spiral sealing part of the shaft seal body and the gear shaft is 0.001-0.002 times of the diameter of the gear shaft.