CN2117508U

CN2117508U - Right-angle sliding ring type combined seal

Info

Publication number: CN2117508U
Application number: CN 92204643
Authority: CN
Inventors: 车恒德
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-17
Filing date: 1992-03-17
Publication date: 1992-09-30

Abstract

The right-angle slip ring type combined seal is characterized by that the slip ring is formed from flat sealing lip and single-side flange, and the width and thickness of the flat sealing lip and flange are controlled in a certain range, so that it can implement dynamic and static sealing of cylinder and shaft for component with any size. The original rubber ring seal can be effectively modified without changing the original seal structure elements, and the purposes of increasing the service life by times and reducing the friction force and the leakage amount can be achieved.

Description

Right angle sliding ring assembled seal

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

Chinese patent (patent No. 86210649.4) " difunctional " pin " shape sliding ring type combination seal " (see figure 1), though overcome shortcomings such as " zero " shape seal with elastometic washer frictional force is big, heat resistance is poor, operating life is low, because slip ring its basic rigidity except that lip of sealing is bigger, poor flexibility, can not stretch by simple starting taper and dote on the method that cover shrinks and install with receiving, so its application is restricted, be suitable for shaft sealing place more, can not be widely used in tube sealing (being loaded on the piston).In addition, the section shape complexity of this kind slip ring structure, amount of finish and difficulty thereof are bigger, thus machining period expense height, and manufacturing efficiency is low.If adopt this kind sealing, must change former seal arrangement, promptly can not reequip under the constant situation of former " zero " shape seal with elastometic washer key element keeping.

The purpose of this utility model is to improve at the shortcoming of existing " difunctional " pin " shape sliding ring type combination seal ", provide a kind of and can keep that its original long working life, frictional force are little, leakage rate low and the slip ring structure of the designs simplification of the molten difunctional advantage for one of dynamic and static sealing, improve technology capability, improve mounting characteristics, enlarge application area, both be suitable for seal shaft, also be applicable to sealing drum.

Technical solution of the present utility model is:

Slip ring in difunctional " pin " shape sliding ring type combination seal that comprises " zero " shape rubber ring, " pin " shape slip ring and axle sleeve composition is made improvements,, change the slip ring of a rectangular shaped into " pin " of the prior art shape slip ring.Promptly form by a straight thin lip and a perpendicular one-sided shelves limit.Its thin lip external diameter and slip ring parallel axes, with width, the thickness on thin lip and shelves limit, be controlled in the suitable scope, when keeping the prior art advantage, give prominence to the installation and the difficult shortcoming of processing that solve slip ring in the prior art, and enlarge its Applicable scope, can be to common " zero " shape rubber seal, under the situation that keeps its former sealing configuration parameter constant,, can significantly improve operating life as long as increase a right angle slip ring, reduce friction, improve sealing reliability.Its reason is: the right angle slip ring is a unenclosed construction, be convenient to processing and metering, greatly reduce owing to slip ring section rigidity simultaneously, the flow ability strengthens, the elastic force of cushion rubber was given full play to, improved sealability and operating life, be convenient to be installed on the piston head again, in the cylinder barrel, axle is first-class.

The performance of combination seal of the present utility model is better than prior art, except that the advantage that has kept prior art, mounting characteristics and technology capability have been improved, thereby enlarged Applicable scope, as the hole of all trades and professions such as aircraft, naval vessel, lathe, equipment, vehicular traffic, petrochemical industry, weaving, power, engineering machinery, the hydraulic pressure and the pneumostop place of axle, be particularly useful for the movable sealing of highi degree of accuracy, high pressure.

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

Fig. 1 a, b are Chinese patent (patent No. 86210649,4) disclosed " pin " shape slip rings.Wherein 1-a is facing and the side-looking structural representation of " pin " shape slip ring;

1-b is the cross section enlarged view of " pin " shape slip ring.

Fig. 2 a, b are the schematic representation of right angle of the present utility model slip ring.Wherein 2-a is the cross section enlarged view that is used for the right angle slip ring of sealing drum; 2-b is slip ring cross section, the right angle enlarged view that is used for seal shaft.

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

By Fig. 2, Fig. 3 as can be known, the utility model is made up of right angle slip ring (1) and " zero " shape cushion rubber (2) and axle sleeve (3), (4) or piston (5).The right angle slip ring can be made outer right angle, and (Fig. 2 a) or interior right angle (Fig. 2 b), outer right angle type slip ring is used for sealing drum; Interior right angle slip ring is used for seal shaft (Fig. 3).Right angle slip ring (1) is made up of two-part: the one, and straight thin lip g, another is to be 90 ° one-sided shelves limit f with it, be " zero " shape rubber ring diameter of section with garden arc R=0.3～0.4d(d between its section) the transition connection.Because the width of g is moderate, equate with d, the very little only 0.2～0.45MM of thickness, the thickness of shelves limit f is 0.2d, and is easy for installation so rigidity is very little, easily stretches to be installed on the piston head in order to the sealing cylinder barrel, seals if axle is used, and can directly install, and need not stretch.Because of right angle slip ring section shape is simple, open wide easy processing, can save machining period more than one times.Thereby directly improved manufacturing efficiency, reduced cost of production, remarkable in economical benefits.The utility model can directly be reequiped existing seal with elastometic washer, under the situation that does not change former sealing configuration key element and part, only increase a right angle slip ring, can reach improve 10 times of operating lives, frictional force be reduced to have only " zero " shape cushion rubber 1/2～1/4 and reduce the purpose of leakage rate.

Combination sealing of the present utility model our experiments show that its processing technology, mounting characteristics and the scope of application etc. all are better than prior art greatly.

Claims

1, a kind of right angle sliding ring type combination seal comprises right angle slip ring, " zero " shape rubber ring and axle sleeve (or piston).It is characterized in that the right angle slip ring is made up of a straight thin lip and an one-sided shelves limit rectangular with it.

According to the combination seal of claim 1, it is characterized in that 2, the width of straight thin lip g equals the diameter of section d of " zero " shape rubber ring, thickness is 0.2～0.45MM.

3, according to claim 1,2 combination seal, it is characterized in that the transition garden arc R between the outer garden face of straight thin lip and the single side face shelves limit is 0.3～0.4d.

4,, it is characterized in that the thickness of one-sided shelves limit f is 0.2d according to claim 1,2 combination seal.