SU1499033A1 - Collar for sealing piston rod, piston and the end plate of hydraulic cylinder - Google Patents

Abstract

The invention relates to a sealing technique and can be used to seal rods, cylinders and cylinder caps. The aim of the invention is to improve the reliability of compaction by accumulating and returning leaks. The cuff contains both outside and inside two main working edges 1, 2 and 3, 4, behind which there is a warming edge 5. Inside the body of the cuff there is a ring-insert 6, the location of which is connected to between the edge groove-7 of the channels 8. Leaking from the working fluid is located in an additional cavity. In the presence of a defect, the working fluid enters the inter-rim groove-cavity 7 and further along channel 8 to the location of the ring insert 6, forming an additional cavity. When the working pressure falls, the additional liquid accumulated by the working fluid returns to the compacted volume with the compressed body of the cuff and the ring-insert stored by the body. 2 hp f-ly, 3 ill.

Description

from CD O CO 00

The invention relates to sealing technology and can be used to seal rods, cylinders and cylinder head covers.

The purpose of the invention is to increase the reliability of compaction by accumulating, 1 return of leaks.

FIG. I shows the cuff, a general view; in fig. 2 - the same, under the pressure of the working fluid; in fig. 3 - option cuff with round rings inserts.

The cuff contains both the outside and the inside (along the opening) with a smaller measure of two main working edges I, 2 and 3, 4. in the free state of the crossed boundaries of the sealing surfaces than the initial tension of the cuff is formed. Behind the main working edges there is a grinded edge 5. Inside the body of the cuff there is a ring-insert 6 of anti-adhesive material, with the convexity facing the main working edges. The location of the ring-insert 6 is connected: between the circumferential groove-cavity 7 channels 8. The mating surfaces of the ring are push-in and the cuffs are made periodic, i.e., alternating lugs and depressions bearing on them in order to maintain the angular position of the ring-insert in the cuff. The working fluid having leaked from it is located in cavity 9. The cuff (Fig. 3) contains two insert rings 10 and II connected to inter-lip grooves 12 and 13 by channels 14 and 15.

The cuff works as follows.

If there is a defect, for example, the first main working edge I, the working fluid enters the interclavor groove-cavity 7 and further along channel 8 to the location of the ring insert 6, forming an additional cavity 9 for the leaked fluid. When the working pressure falls, the accumulated cavity 9, the working fluid returns to the cylinder with stored cuff compressed energy and, if the ring-insert is elastic, for example made of rubber, then the ring-insert.

Claims (3)

1.Band for sealing the rod, piston, cylinder cover, containing working edges, separated by annular grooves, with a lifting edge, characterized in that reliability of work, inside the cuff there is a cavity, connected by channels with an annular groove, while inside the cavity there is a ring-insert, which is made of anti-adhesive material. 2. The cuff under item I, characterized in that the ring insert is made C-shaped and is turned with a convex surface toward the working edges. 3. Mangeta on PP. I n 2, characterized in that the surface of the ring-insert and the surrounding magesta are conjugated. Shig.g 7 / eleven X fig.Z