SU996780A1 - Face seal - Google Patents

Description

(54) TYPICAL SEAL

one

The invention relates to a sealing technique and can be used to seal the rotating shafts of centrifugal pumps and chemical apparatus.

Butt-end constructions are known that contain pressing ("1st rotating and rotating rings to each other, one of KOfopax has a porous insert on the working surface communicating with the flexible medium. 1.

 The disadvantages of these structures are increased leakage of the densified medium through the gap of a pair of friction, as well as the need to use expensive materials (usually difficult to handle) when locking media with high values of operating parameters (pressure, temperature) and aggressive media. Moreover, when working in some corrosive environments, even the use of such expensive materials does not provide the required sealing life due to the corrosive effect of the medium on the wear of the contact surfaces.

The aim of the invention is to increase the reliability and durability of the mechanical seal when locking aggressive liquid.

This goal is achieved by the fact that the seal is equipped with a chamber filled with an inhibitor placed in one of the sealing rings, and a spring-loaded piston is installed in the killer on the outside end side.

The drawing shows the seal

10 overall view, cut.

A non-rotating sealing ring 2, sealed with a rubber ring 3, is fixed in the housing 1. Ring 2: pressed: by means of elastic elements 4 and washers 5 a rotating sealing ring 6 with a porous end 7 and a chamber 8 filled with an inhibitor. As an inhibitor, for example, pyridine can be used.

20 N- (n-decyl) -3-hydroxy chloride (KPI-1) or polybutylene (PB), p-naphthol and other

The chamber 8 with the inhibitor is separated from the densified medium by the piston 9, which is spring-loaded with springs 10 that support; washer 5. The ring 6 is sealed on the shaft 11 by a rubber ring 12. The torque from the shaft AND to the rotating ring 6 is transmitted through the adjusting adapter 13, the sleeve 14 and the pin 15.

Claims (1)

30 Compaction works as follows. When shaft 11 is activated, the sealing ring 6 is treading on non-rotating ring 2, as a result of which heat is generated on the rubbing surfaces. The temperature of the working surfaces of contact rings is mainly in OO-SO. At this temperature, the viscosity of the inhibitor ring 6 filled into chamber 8 decreases in the adjacent layers of the working porous end. Under the pressure of the compacted medium and the spring-loaded piston 9, the inhibitor is supplied through the pores 7 of the ring 6 to the surface pipelines. This ensures the formation of stable protective films on the contact surfaces to increase the wear resistance of the friction pair. The technical and economic effect is based on using less scarce materials and increasing durability when working in aggressive environments. The proposed seal reduces the gas content of the rooms in which the machines and devices sealed by them are used improves the working conditions of the staff. The invention mechanical seal, including rotating and non-rotating sealing rings with a porous insert on the working end of one of them, elastic elements, characterized in that, in order to improve the reliability and durability of its operation when locking aggressive liquid, a killer is made in one of the sealing rings , filled with an inhibitor, and on the non-working end side, a spring-loaded piston is installed in the chamber. Sources of information taken into account in the examination; 1. Golubev G.A. and others. Contact seals of rotating shafts. M., Mechanical Engineering, 1967, p. 200, fig. 114, b.