CN1193705A

CN1193705A - Shaft sealer

Info

Publication number: CN1193705A
Application number: CN98110119A
Authority: CN
Inventors: 张仲乐
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-19
Filing date: 1998-03-19
Publication date: 1998-09-23

Abstract

An axle sealer for rotational machine is composed of skeleton and friction surface, both of which is an integral structure made up of teflon or compound teflon. The skeleton can also be made up of high-rigidity light material and friction surface made up of teflon can be inlaid onto rigid skelton by beating or pressing. Its advantages include high reliability, small gap and friction, and good antiwear performance.

Description

A kind of shaft sealer

The present invention relates to a kind of shaft sealer that in rotary machine, is widely used, belong to the seal arrangement field.

Several axle sealing structures that are widely used in existing rotary machine have: be used for the oil-tightening broach of bearing chamber, labyrinth structure, reach all kinds of elasticity, soft material sealing configuration, the Babbitt sealing bearing bush structure that is used for hydrogen-cooled generator, the equal reliability of these sealing configurations is relatively poor, it is big that ubiquity seal clearance, the sealing surface antiwear property is poor, the sound friction easily takes place, cause the bigger or sealing surface of seal clearance to damage problems such as inefficacys, even more serious is often causes high-precision journal damage even causes axle journal bending accident because of violent friction.

The object of the present invention is to provide and a kind ofly can guarantee effectively that the sealing effect of rotating machinery, seal clearance are little, antiwear property by force, the shaft sealer of wear equipment rotating shaft not.

The objective of the invention is to be achieved through the following technical solutions: a kind of shaft sealer, include skeleton, its special way is that described skeleton is centered around the rotating shaft periphery, also be provided with rubbing surface between skeleton internal surface and the rotating shaft, skeleton and rubbing surface are structure as a whole, and adopt the teflon or the ptfe composite of rub resistance to make.

Described ptfe composite is to add suitable amount of graphite, glass yarn, copper powder to make in teflon, and the ptfe composite of making can make the Sealing performance after the moulding further be improved and strengthen.

Rigidity for enhanced leaktightness spare, do not increase its weight again, keep lightweight characteristics, described skeleton adopts the strong lightweight material of rigidity to make, lightweight material can adopt aluminium, static and dynamic sealing face place adopts teflon or ptfe composite to make rubbing surface, and rubbing surface adopts sth. made by twisting to beat or pressing method is embedded on the skeleton to guarantee that shaft sealer moves in the minimum clearance scope.

The rubbing surface of shaft sealer of the present invention adopts teflon or ptfe composite material to make, the unfailing performance height, and seal clearance is little, and antiwear property is good, and frictional force is little, and has high temperature resistant, corrosion-resistant, self-lubricating property; Skeleton adopts lightweight material, has both strengthened the rigidity of Sealing, does not increase its weight again, keeps its lightweight characteristics.

Accompanying drawing and drawing are described as follows:

Fig. 1: embodiment's 1 shaft sealer structural representation;

Fig. 2: embodiment's 2 shaft sealer structural representations;

Fig. 3: embodiment's 3 shaft sealer structural representations.

Among the figure: 1 skeleton, 2 rubbing surfaces, 3 rotating shafts.

Provide specific embodiments of the invention below in conjunction with accompanying drawing, be used to further specify the present invention.

Embodiment 1, with reference to figure 1, is a kind of shaft sealer that is used for substituting power station hydrogen-cooled generator sealing bearing bush, and its skeleton 1 is structure as a whole with rubbing surface 2, adopts teflon to make, can guarantee to move seal clearance little, do not leak.

Embodiment 2, with reference to figure 2, it also is a kind of shaft sealer that is used for substituting power station hydrogen-cooled generator sealing bearing bush, itself and embodiment's 1 difference is that skeleton 1 adopts the strong lightweight material aluminium of rigidity to make, rubbing surface 2 adopts teflon or ptfe composite to make, rubbing surface 2 adopts sth. made by twisting to beat or pressing method is embedded on the aluminum skeleton 1, the static and dynamic sealing face is sentenced the rubbing surface that teflon makes and is combined with rotating shaft, thereby guaranteed sealing effect, the gap is little, antiwear property good, reliability height, not frictionally damage axle journal.

Embodiment 3, with reference to figure 3, be a kind of shaft sealer for the employing of rotating machinery bearing chamber oil seal, its skeleton 1 is structure as a whole with rubbing surface 2, the employing ptfe composite is made, can fully guarantee to move seal clearance little, do not leak, frictionally damage axle journal not.

Claims

1, a kind of shaft sealer, include skeleton (1), it is characterized in that described skeleton is centered around the rotating shaft periphery, also be provided with rubbing surface (2) between skeleton internal surface and the rotating shaft, skeleton (1) is teflon that adopts rub resistance or the integrative-structure that ptfe composite is made with rubbing surface (2).

2,, it is characterized in that described ptfe composite is graphite, glass yarn, copper powder to be added in the teflon make according to the described a kind of shaft sealer of claim 1.

3, according to the described a kind of shaft sealer of claim 1, it is characterized in that described skeleton (1) adopts the strong lightweight material of rigidity to make, rubbing surface (2) still adopts teflon or ptfe composite to make.

4,, it is characterized in that described rubbing surface (2) adopts sth. made by twisting to beat or pressing method is embedded on the rigid backbone (1) according to the described a kind of shaft sealer of claim 3.