CN202746602U

CN202746602U - Rotary sealing device for rotation shaft of motor

Info

Publication number: CN202746602U
Application number: CN2012204104650U
Authority: CN
Inventors: 马彦斌; 王志斌
Original assignee: WANJIE SPEED REDUCER CO Ltd HANGZHOU
Current assignee: WANJIE SPEED REDUCER CO Ltd HANGZHOU
Priority date: 2012-08-17
Filing date: 2012-08-17
Publication date: 2013-02-20
Anticipated expiration: 2022-08-17

Abstract

A rotary sealing device for a rotation shaft of a motor comprises a lip-type sealing ring and the rotation shaft, wherein a lip opening of the lip-type sealing ring contacts the surface of a shaft extension of the rotation shaft, and the shaft extension contacting the lip opening is provided with a guide groove along the circumferential direction. The rotary sealing device for the rotation shaft of the motor has the advantages that the design that the guide groove is arranged in the shaft extension enables the assembly of a bearing to be eliminated, including damage to hard objects; the design of the guide groove effectively reduces the pressure on the lip opening of lip-type sealing ring from gear lubricant, and heating caused by friction of a sliding surface due to increase of pressure is avoided; due to the design of a slop surface of the guide groove, when the rotation shaft rotates, acting force of oily contamination particles attached on the inclined plane is small, the oily contamination particles are directly tossed out of the slop surface, and abrasion of the lip opening from the contamination particles is reduced; and due to the design of the slop surface of the guide groove, the area of an oil line is increased, accumulation of lubricating oil is benefited, and an effective oil film is formed at a matched surface of the lip opening.

Description

The machine shaft rotating sealing device

Technical field

The utility model relates to a kind of machine shaft rotating sealing device.

Background technique

When numerous traditional geared motor Seal Design, what seal arrangement adopted is the rotary shaft lip seal structure, the long-term use of geared motor is lower to cause the wearing and tearing of lip-type packing lip section excessive easily, the problems such as lip section sclerosis cause the lip position to reveal gear lubricant, cause the wearing and tearing of seal ring lip section excessive, the reason of lip section sclerosis is because following components forms: 1. shaft extension is when running in bearings, run into easily lip-type packing lip fitting surface, cause shaft extension to scratch, roll mark affects the cooperation of lip seal; 2. lubricant oil is excessive to the pressure of seal ring in the gear-box, an amount of pressure energy is that the distortion of seal ring lip reaches desirable sealing effect, but excessive pressure has increased the friction of slip surface, causes heating, impels system's temperature rise and further increases force of sliding friction; 3. the lack of lubrication between seal ring lip and the axle does not form enough oil films, lubrication failure and make system be in dried operating condition; 4. behind the interior lubricant pollution of gear-box, be mingled with iron filings in the oil to the destruction of seal ring lip; For above problem, existing research all is to improve in lip-type packing, but this wearing and tearing and the sclerosis of lip section that can't fundamentally change seal ring cause the lip position to reveal the problem of gear lubricant.

Summary of the invention

Cause easily the problem that the wearing and tearing of lip-type packing lip section are excessive, the sclerosis of lip section causes lip position leakage gear lubricant for for a long time use of seal arrangement that solves machine shaft is lower, the utility model proposes a kind of lip section that reduces and wear and tear, prolong the seal ring machine shaft rotating sealing device in working life.

Machine shaft rotating sealing device described in the utility model is characterized in that: comprise lip-type packing and rotating shaft, and the shaft extension Surface Contact of the lip of described lip-type packing and rotating shaft, the described shaft extension that contacts with described lip is along circumferentially offering guiding groove.

The two ends of described guiding groove are arranged to domatic.

During use, rotating shaft runs well, and it is little that oily contamination particle the active force that overlays on the inclined-plane, directly is thrown out of domatic; And the domatic oil circuit area that increased of shaft extension is beneficial to the accumulation of lubricant oil, forms effective oil film in the position that lip contacts with shaft extension.

The beneficial effects of the utility model are: 1) do the design of guiding groove in shaft extension, avoided bearing assemble, comprise hard thing damage; 2) design of guiding groove has effectively reduced the pressure of gear lubricant to the seal ring lip, has avoided because the heating that the friction of the slip surface that the pressure increase causes causes; 3) owing to the domatic design of guiding groove, in the time of the rotating shaft rotation, it is little that oily contamination particle the active force that overlays on the inclined-plane, directly is thrown out of domatic.Reduce contamination particle to the wearing and tearing of lip; 4) the domatic design of guiding groove has increased the oil circuit area, is conducive to the accumulation of lubricant oil, can form effective oil film at the lip fitting surface.

Description of drawings

Fig. 1 is that (wherein, 1 ' is lip-type packing to traditional rotating shaft rotating sealing device structural drawing; 2 ' is rotating shaft; 3 ' is oil film; A ': represent atmospheric side; B ': represent oily side).

Fig. 2 is structural drawing of the present utility model (wherein, A: represent atmospheric side; B: represent oily side).

Fig. 3 is use phase diagram of the present utility model.

Fig. 4 is the partial enlarged drawing of Fig. 3.

Embodiment

Further specify the utility model below in conjunction with accompanying drawing

With reference to accompanying drawing:

Machine shaft rotating sealing device described in the utility model, comprise lip-type packing and rotating shaft, the lip 11 of described lip-type packing 1 and shaft extension 21 Surface Contacts of rotating shaft 2, the described shaft extension 21 that contacts with described lip 11 is along circumferentially offering guiding groove 211.

The two ends of described guiding groove 211 are arranged to domatic 212.

During use, rotating shaft 2 runs well, and it is little that oily contamination particle the active force that overlays on the inclined-plane, directly is thrown out of domatic 212; And shaft extension 21 domatic 212 increased the oil circuit area, be beneficial to the accumulation of lubricant oil, form effective oil film 3 in the position that lip 11 contacts with shaft extension 21.

The described content of this specification embodiment only is enumerating the way of realization of model utility design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reaches the equivalent technologies means that design can be expected according to the utility model in those skilled in the art.

Claims

1. machine shaft rotating sealing device is characterized in that: comprise lip-type packing and rotating shaft, and the shaft extension Surface Contact of the lip of described lip-type packing and rotating shaft, the described shaft extension that contacts with described lip is along circumferentially offering guiding groove.

2. machine shaft rotating sealing device as claimed in claim 1, it is characterized in that: the two ends of described guiding groove are arranged to domatic.