SU892071A1 - End seal - Google Patents

Description

(54) MECHANICAL SEAL

I

This invention relates to a sealing technique.

Mechanical seals are known, comprising a stationary ring and a rotating ring, which is pressed by the pressure mechanism with the possibility of elastic rotation relative to the shaft and provided with holes for supplying lubricant to the friction surface through channels in the distribution washer in contact with the rotating ring 1.

Their disadvantage is increased leakage.

The purpose of the invention is to reduce leakage and increase reliability.

The goal is achieved in that the distribution washer is rigidly connected to the shaft and is in contact with the rotating ring on the outer surface.

FIG. 1 shows a seal, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The seal consists of a housing 1, a stationary ring 2, a shaft 3, a rotating ring 4 sealed with a shaft 5. The pressure mechanism consists of a spring 6, an anvil ring 7 and a locking ring 8. On the rings 4 and 7 there are slots 9 in which the entrance The protrusions of the spring 6. In the rotating ring 4 there are channels 10. On the shaft, with the help of a spring ring 11 and a finger 12, a distributor 13 with holes 14 is fastened.

In the rotating working ring there is a stopper 15, entering in the window 16, made in the wall of the distributor.

Seal works as follows. On the rotating working ring 4, there is a moment of friction against

Q hour hand (Fig. 2). Under the action of this moment, the spring 6 is twisted, and the hole 10 takes the position shown by the dotted line (Fig. 2).

In this position, normal sealing operation is performed. With insufficient lubrication in a pair of friction, the increase in the moment of friction occurs first. Under the action of increased friction torque, further tightening of the ring 4 on the spring 6 takes place until the stop 15 stops against the edge of the window 16.

20 In this position, the channels 10 in the ring 4 and the holes 14 in the distributor coincide, which ensures the flow of lubricant through them to the rubbing pair.

Claims (1)

Claim Mechanical seal containing a stationary ring and a rotating sealing ring, pressed by a pressure mechanism with the possibility of elastic rotation relative to the shaft and provided with holes ¹⁰ for supplying lubricant to the friction surface through the channels in the distribution washer in contact with the rotating ring, characterized in that, in order to increase reliability and to reduce leaks, junction _{15 the} dividing washer is rigidly connected to the shaft and adjoins the rotating ring on the outer surface.