CN2474813Y

CN2474813Y - Magnetic fully sealing zero gravity force oil seal

Info

Publication number: CN2474813Y
Application number: CN 01208144
Authority: CN
Inventors: 谭旭
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-28
Filing date: 2001-03-28
Publication date: 2002-01-30
Anticipated expiration: 2011-03-28

Abstract

The utility model discloses an oil seal with magnetic complete seal in a zero gravity, comprising an oil seal substrate with the through-hole in the middle, wherein the oil seal substrate is made by the ferromagnetic material. The inner wall of the oil seal substrate through-hole has an annular groove which is positioned towards the substrate along the radial direction. The annular groove is provided with an annular sealing ring, wherein a gap exists between the lateral side and the head face of the sealing ring and the bottom and the lateral side of the annular groove. A permanent magnet is arranged at the head face near the axial side in the sealing ring, besides the head face near the axial side which is provided with the permanent magnet absorbs the lateral side of the annular groove with no gap. The oil seal with magnetic complete seal in a zero gravity has the advantage of good sealing performance.

Description

Magnetic force seals the zero-g oil sealing fully

The utility model relates to a kind of oil sealing, and particularly a kind of rotatingshaft radial vibration is than the oil sealing that uses in the overall situation.

Oil sealing is a kind of being used on the rotatingshaft, and no gap cooperates between the component of the outer side surface that makes rotatingshaft and supporting rotatingshaft, prevents the sealed member that fluid spills from the outer side surface slit of rotatingshaft.The structure of a kind of oil sealing commonly used is as follows in the bigger environment of high temperature and rotatingshaft radial vibration: it comprises that a centre is shaped on the oil sealing matrix of manhole, radially in the oil sealing matrix, be shaped on a circular groove on the inwall of the manhole of oil sealing matrix, along through hole, be provided with O-ring seal in circular groove, radially there is gap (this gap is used to adapt to the radial vibration of rotatingshaft) in the side of seal ring with the bottom of circular groove; There are gap (this gap is used to adapt to the axial vibration of rotatingshaft) in the end face of the axial end of seal ring and the sidewall of circular groove, in this gap Stamping Steel Ribbon are installed; The oil sealing of this structure in use, the center hole that the rotatingshaft that adapts with O-ring seal center hole size is inserted O-ring seal gets final product, though the annular groove of the oil sealing matrix of the oil sealing of this structure and seal ring are in the radial and axial gap that all exists, in the gap of axial vane surface, Stamping Steel Ribbon is installed, can play seal action, but Stamping Steel Ribbon uses in the bigger environment of high temperature and rotatingshaft radial vibration, easily produce fatigue deformation, lose sealing effect, cause oil sealing to leak.

The purpose of this utility model is to provide a kind of magnetic force of good seal to seal the zero-g oil sealing fully.

The purpose of this utility model is achieved by the following technical solution: this magnetic force seals the zero-g oil sealing fully and comprises that a centre is shaped on the oil sealing matrix of being made by ferromagnetic substance of manhole, on the inwall of the manhole of oil sealing matrix, radially in the oil sealing matrix, be shaped on a circular groove along through hole, in circular groove, be provided with O-ring seal, radially there is the gap in the side of seal ring with the bottom of circular groove, there are the gap in the end face of seal ring axial end and the sidewall of circular groove, the part of a nearly axial end end face is equipped with permanent magnet in seal ring, and the sidewall that seal ring closely is equipped with the end face of axial end of permanent magnet and circular groove does not have the gap and is pulled together.

Because the utility model magnetic force seals the part of zero-g oil sealing nearly axial end end face in its seal ring fully permanent magnet is installed, the sidewall that seal ring closely is equipped with the axial end end face of permanent magnet and circular groove does not have the gap and is pulled together, during rotatingshaft radial vibration in being installed in the seal ring center hole, seal ring closely is equipped with the axial end of permanent magnet can be all the time not to be had the gap with the sidewall of circular groove and is pulled together, and,, this magnetic force can play better sealing effect so sealing the zero-g oil sealing fully with rotatingshaft radial vibration synchronous vibration.Again because seal ring closely is equipped with the axial end of permanent magnet with rotatingshaft radial vibration synchronous vibration, and can be adsorbed on the arbitrary position of circular groove sidewall at any time, so seal ring can not produce because of action of gravity on rotatingshaft, with the wear and tear phenomenon of rotatingshaft of vibration.

Below in conjunction with drawings and Examples the utility model magnetic force being sealed the zero-g oil sealing fully is described further.

Fig. 1 seals the cut-away view of zero-g oil sealing fully for the utility model magnetic force

As shown in Figure 1, the utility model magnetic force seals the zero-g oil sealing fully and comprises that a centre is shaped on the oil sealing matrix of being made by ferromagnetism speciality (as iron, nickel etc.) 1 of manhole, radially in oil sealing matrix 1, be shaped on a circular groove 2 on the inwall of the manhole of oil sealing matrix 1, along through hole, be provided with O-ring seal 3 in circular groove 2, (seal ring 3 can be made by materials such as rubber; But can not be ferromagnetic substance) radially there is gap 4 in the side of seal ring 3 with the bottom of circular groove 2, there is gap 6 in the end face 5 of seal ring 3 axial ends with the sidewall of circular groove 2, the part of the end face of nearly another axial end is equipped with permanent magnet 8 in seal ring 3, permanent magnet 8 can be that NdFeB material is made, can be that zirconium cobalt material is made, the axial end end face 7 that permanent magnet 8 closely is installed in the seal ring 3 have the gap with the sidewall of circular groove 2 and is pulled together yet.Certainly as can be seen from the figure, permanent magnet 8 is installed in the effect that seal ring 3 interior nearly any axial end end face can play sealing.The center hole that the rotatingshaft 10 that handle and O-ring seal 3 center hole sizes adapt during use inserts O-ring seals 3 gets final product.

Claims

1, a kind of magnetic force seals the zero-g oil sealing fully, comprise that a centre is shaped on the oil sealing matrix of being made by ferromagnetic substance of manhole, on the inwall of the manhole of oil sealing matrix, radially in the oil sealing matrix, be shaped on a circular groove along through hole, in circular groove, be provided with O-ring seal, radially there is the gap in the side of seal ring with the bottom of circular groove, there are the gap in the end face of seal ring axial end and the sidewall of circular groove, it is characterized in that: the part of a nearly axial end end face is equipped with permanent magnet in seal ring, and the sidewall that the axial end end face of permanent magnet and circular groove closely are installed in the seal ring does not have the gap and is pulled together.

2, magnetic force according to claim 1 seals the zero-g oil sealing fully, it is characterized in that: described permanent magnet is made by NdFeB material or zirconium cobalt material.

3, magnetic force according to claim 1 and 2 seals the zero-g oil sealing fully, it is characterized in that: the part of a nearly axial end end face is equipped with permanent magnet and is meant in two axial end end faces of seal ring any in the described seal ring.