CN2195660Y

CN2195660Y - Tooth-shaped sliding ring type combined seal

Info

Publication number: CN2195660Y
Application number: CN 94213453
Authority: CN
Inventors: 车恒德
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-09
Filing date: 1994-06-09
Publication date: 1995-04-26
Anticipated expiration: 2004-06-09

Abstract

The combined sealing ring is composed of serrated edge lip, auxiliary sealing lip and single-side flange, and can control the angle, width and thickness of serrated edge lip and flange in a certain range, and can implement dynamic and static sealing of hole and shaft for component with any size. The original rubber ring seal can be effectively modified to achieve the purposes of improving the service life by times and reducing the friction force and the leakage amount. The sealing device can be widely used for hydraulic and pneumatic sealing of high-speed rotation and high-speed reciprocating motion.

Description

Combined sealing

The utility model relates to a kind of combination sealing arrangement.

Chinese patent (patent No. 92204643.3) " right angle sliding ring type combination seal " is though that (see figure 1) has overcome " o " shape seal with elastometic washer frictional force is big, heat resistance is poor, shortcomings such as operating life is low, but because this kind sealing must be " face " contact with contacting of antithesis sealing surfaces unexpectedly, when under the high speed rotating state, doing motive sealing, the frictional heat that produces is bigger, and is difficult for scattering and disappearing.Cause the rising of slip ring The friction coefficient temperature thus and suddenly gather increase, accelerated wear test, sealing lost efficacy ahead of time.Thereby its application is restricted, is suitable for the sealing of to-and-fro motion and low speed rotation more, can not extensive use high speed rotating and the extremely low sealing position of frictional force requirement.

This is suitable for novel purpose is to improve at the shortcoming of " right angle sliding ring type combination seal ", provide a kind of and promptly have the high workload life-span, it is minimum to reach frictional force again, and frictional heat is low, the novel sealing structure that leakage rate is low, thus the application area of combination seal enlarged.Both, be particularly useful for the minimum pneumostop of requirement frictional force, can be used for the hydraulic pressure and the pneumostop of high speed rotating again applicable to reciprocating movement sealing.

Technical solution of the present utility model is:

Slip ring in the right angle sliding ring type combination seal that comprises " o " shape rubber ring and right angle type slip ring composition is made improvements, " right angle type slip ring " of the prior art changed into a slip ring that has a zigzag fashion cutting edge lip and an auxiliary seal lip.Promptly having toothed cutting edge lip, an auxiliary seal lip and an one-sided shelves limit perpendicular with it by one forms.Its sealing lip limit (cutting edge lip and auxiliary seal lip) and slip ring parallel axes, with the sealing lip limit with shelves the limit width, thickness, angle, be controlled in the suitable scope, when keeping the prior art advantage, the rubbing contact area that exists in the outstanding solution prior art is big, the shortcoming that frictional force and frictional heat are big, enlarge its Applicable scope, make it be applicable to the reciprocal of low friction at a high speed and the sealing position that rotatablely moves more.Its reason is: profile of tooth sealing cutting edge, auxiliary seal antelabium are " line " contact with contacting of sealing dual face, and minimum because of area of contact during high-speed motion thus, so the frictional force of generation is extremely low, and heat is also little.The auxiliary seal lip both can increase the backup seal lip one, made between itself and the zigzag fashion cutting edge to have outside the proper lubrication agent, also can play preventing to produce extraneous air pocket interference and dust-tight effect.Guaranteeing to have reduced frictional heat in a large number under the situation that " o " shape seal with elastometic washer elastic force is given full play to, sealing and operating life have been improved.Enlarged application area,, especially fundamentally solved " creeping " motion that is prone under the unsolved for many years low speed low-pressure state on pneumatic and the hydraulic pressure industry as high speed to-and-fro motion and rotary seal.

Be described in detail structure of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is Chinese patent (patent No. 92204643.3) disclosed " a right angle slip ring ".

Wherein Fig. 1 a is facing and the side-looking structural representation of right angle slip ring;

Fig. 2 a, b are the schematic representation of profile of tooth slip ring of the present utility model.

Wherein Fig. 2 a is the profile of tooth slip ring cross section enlarged view that is used for seal shaft;

Fig. 2 b is the profile of tooth slip ring cross section enlarged view that is used for closed hole;

Fig. 3 a, b are the sectional views after the utility model assembling.Wherein Fig. 3 a is the structural representation of closed hole; Fig. 3 b is the structural representation of seal shaft.

By Fig. 2 and Fig. 3 as can be known, the utility model is made up of profile of tooth slip ring (1) and " o " shape cushion rubber (2) and axle sleeve (3), (4) or piston (5).The profile of tooth slip ring can be made external tooth form (Fig. 2 b) or internal tooth form, and (Fig. 2 a), the external tooth form slip ring is used for closed hole; The internal tooth form slip ring is used for seal shaft (Fig. 3), and profile of tooth slip ring (1) is made up of 3 parts; The one, have the sealing lip g of zigzag fashion cutting edge, another is auxiliary seal lip j, and is 90 ° one-sided shelves limit f with it.Being " o " shape rubber ring diameter of section with garden arc R=0.3～0.5d(d between its section) transition connects.Because the thickness of the width of g and shelves limit f is moderate, then rigidity is very little, and is then easy for installation, can be installed on the piston in order to closed hole, also can be installed on and do shaft sealing on the axle.Because the frictional force of this sealing is all little more than 5 times than prior art with frictional heat, thereby has thoroughly solved the pneumatic and hydraulic seal and the high speed rotating sealing technique difficult problem of low friction requirement, make its service life as compared prior art improve 5～10 times.And realized Oilless Lubrication Seal in Petroleum Gas.

Combination seal of the present utility model shows that through practice its application area is better than prior art greatly, and has thoroughly solved the technical barrier that extremely hangs down friction and high speed rotating, long-life sealing.

Claims

1, a kind of profile of tooth sliding ring type combination seal comprises profile of tooth slip ring, " O " shape rubber ring and axle sleeve (or piston).It is characterized in that the profile of tooth slip ring is made up of a zigzag fashion cutting edge lip, auxiliary seal lip and a perpendicular one-sided shelves limit.

2, according to the combination seal of claim 1, it is characterized in that it is " O " shape rubber ring diameter of section that the width of toothed cutting edge lip g equals 0.4～0.8d(d), thickness δ is 0.4～0.8mm, the gradient α of its tooth is 18～20 degree, and the cutting edge h of tooth is wide to be 0～1mm.

According to the combination seal of claim 1 or 2, it is characterized in that 3, the transition garden arc R between the outer garden face of profile of tooth slip ring and the single side face shelves limit is 0.3～0.5d.

According to the combination seal of claim 1 or 2, it is characterized in that 4, one-sided shelves limit thickness f is 0.5～1.5mm.