SU1379549A1 - Shaft contact seal - Google Patents

Abstract

The invention relates to a sealing technique, namely to contact seals of rotating shafts. The purpose of the invention is to increase the reliability of compaction by stabilizing the rotational speed of the elastic sealing ring, as well as by optimizing friction. The sealing ring 1 is made with conical and flat friction surfaces, interacting with the conical and flat surfaces of the parts of the joint. The bearing separator 9 is provided with a driver 10, which interacts with the bracelet spring 6, which encloses the sealing ring, which allows maintaining the speed of rotation of the ring at about half the speed of rotation of the shaft. In addition, the bracelet spring 6 provides axial movement of the sealing ring 1 as it is worn 2 Cp. f-ly, 4 ill. (O (L with so 01 4; with figure 1

Description

The invention relates to sealing technology, namely to contact seals of rotating shafts.

The purpose of the invention is to increase the reliability of the seal by stabilizing the rotational speed of the elastic sealing ring, as well as by optimizing the friction mode of the sealing ring.

FIG. 1 shows a shaft contact seal, a slit; in fig. 2 is the same embodiment of j in fig. 3 is a section A-A in FIG. 2, FIG. 4 is a section B — b in FIG. 2 „

The contact seal of the shaft contains a sealing ring 1, a movable 2 and a fixed 3 parts of the sealing joint with the face A and conical 5 surfaces, as well as a bracelet spring 6 placed in the groove 7 on the outer surface of the ring. The sealing ring 1 contains radial slots 8 on the outer surface, a cage bearing cage 9 and a leash 10 in contact with the spring 6.

The leash 10 enters the space with the turns of the bracelet spring 6. The bracelet spring 6 presses the sealing ring 1 simultaneously to the movable 2 and the fixed 3 parts of the joint.

Seal works as follows.

If the bracelet spring 6 is not connected with the bearing cage 9 and the shaft rotates, the sealing ring 1 slides over the end surface 4, remaining stationary relative to the conical surface 5 of the parts to be compacted, since the friction force on the end surface 4 is less than on the conical surface 5.

The connection of the separator 9 with the sealing ring 1 through the bracelet spring 6 ensures the transfer of torque from the separator 9 to the ring 1 over the entire area of contact of the spring 6 with the ring 1 while maintaining the mobility of the sealing ring relative to the separator in the radial and axial directions. At the same time, the uniformity and stability of the contact pressure over the sealing surfaces is maintained in the presence of a radial shaft shaft and significant wear.

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With a driver 10 connecting the roller bearing cage 9 to the bracelet spring 6, the rotational speed of the spring becomes equal to the speed of rotation of the separator and is about half the speed of the outer surface of the shaft. When rotating, the bracelet spring 6 carries away the sealing ring 1 at the same speed, therefore, the slip speeds of the ring along the end 4 and conical 5 surfaces also amount to about half the speed of the shaft.

As the end of the sealing ring 1 is worn, the spring automatically ensures its movement in the axial direction. If there are radial slots 8 on the sealing ring 1 interacting with the parts of the joint, the seal protection against ingress of particles in the working fluid is improved, and the lubrication and heat transfer of the rubbing surfaces are improved, which increases the life of the seal. On the other hand, the slits 8 reduce the cross-sectional area of the sealing ring 1, which increases its flexibility.

Claims (2)

Invention Formula 1, a shaft contact seal consisting of a rolling bearing support, a bearing cage, a rotating elastic sealing ring located in the gap between the surfaces of the sealing joint, one of which is flat and the other conical, characterized in that the underbody separator is provided with leads, and the sealing ring is provided with flat and conical friction surfaces in contact, respectively, with flat and conical interface surfaces, while the leads of the separator tvuyut with sealing ring. 2. Sealing according to claim 1, characterized in that it is provided with a bracelet spring, and on the outer surface of the sealing ring there is a groove, the bracelet strand being placed in the groove, and the separator leads interact with the sealing bracelet spring. ring through 313795494 3c Sealing on PP. 1 and 2, the outer surface of the seal is characterized by the fact that radial cuts are made on the rings. one FIG. 2 Aa fig.Z  YU eri g A