RU1780572C - Ring seal - Google Patents

Abstract

Usage: in oil-filled gearboxes of downhole motors for drilling oil and gas wells. SUMMARY OF THE INVENTION: an elastic ring is mated on the outer surface with the inner surface of the sleeve and located in the groove of the ring holder, which is sealed to the shaft. Additional elastic rings and ring holders are made similar in shape to the first. The ring holders are hermetically mounted on the shaft and docked on the end face m. The elastic rings are located, 1 in the grooves of the ring holders with the possibility of axial movement and are interconnected between the bushings. Grooves are made in the rings on the outer surface, in which rubber rubber rings are installed. 1 ill. Ј

Description

The invention relates to mechanical engineering and can be used in oil-filled gearboxes of downhole motors for drilling oil and gas wells.

An annular seal is known, containing rings in the details of a fixed housing and mounted on a shaft with minimal clearance.

An o-ring seal is also known, comprising a sleeve, an elastic ring mating with the sleeve, a ring holder fixed to the shaft.

A disadvantage of the known ring seal is the low reliability at high pressures due to the rapid wear of the friction surfaces of the elastic rings and the ring holder, in which, when hardening occurs in places

Upon contact, the seal becomes a non-separable lock.

The purpose of the invention, improving reliability, is achieved by the fact that the annular seal comprises an elastic ring mating on the outer surface with the inner surface of the sleeve and located in the groove of the ring holder mounted tightly on the shaft, additional elastic rings and additional ring holders, made similar to those available, while these the ring holders are hermetically mounted on the shaft and joined along the end surfaces, and the elastic rings are located in the grooves of the ring holders with the possibility of axial movement scheni are interconnected dividing bushings, wherein the outer surfaces of other

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with

the rings are grooves in which the sealing rubber rings are installed

The drawing shows an annular seal.

The O-ring contains an elastic ring 1, mating on the outer surface with the inner surface of the sleeve 2 and located in the groove of the ring holder 3, mounted on the shaft 4, additional elastic rings 5 and additional ring holder b, made similar to those available, while these ring holders b are sealed tightly on the shaft 4 and are joined along the end surfaces, and the elastic rings 5 are located in the grooves of the ring holders with the possibility of axial movement and are interconnected by separation sleeves 7, it on the outer surfaces of the elastic rings 5 formed grooves in which sealing rubber mounted ring 8

The operation of the ring seal is based on the creation of specific pressures on the cylindrical surface of the sleeve 2 using the elasticity of the rubber rings 8, the action of high pressures of the liquid being sealed on the elastic rings 1 and 5 and due to this locking end contact between the walls of the elastic rings 1 and 5, which rub against the walls grooves of the ring holders 3 and 6, mounted on a rotating shaft 4

Together with the shaft 4, the ring holders 3 and 6 rotate on it. With axial movements of the shaft 4 with the ring holders 3 and b hermetically mounted on it, during the operation of the mechanism, the elastic rings 1 and 5 self-install in the grooves of the ring holders 3 and b

and their axial movement together with dividing 7 bushings and sealing rings 8 relative to the sleeve 1 without compromising the quality of the seal,

Installing O-rings 8 on

the elastic rings 5 creates a tight movable connection of the ring holders 3 and 6 with the shaft 4, and the connection of the elastic rings 5 with the separation sleeves 7 provides

strict orientation of the elastic rings 5 in the grooves of the ring holders 3 and b, which ensures reliable operation of the ring seal.

The detachable design of the ring holders 3 and 6 ensures their sequential assembly with the elastic rings 1 and 5 on the shaft, as well as their replacement during the repair of the ring seal.

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Claims (1)

The claims An O-ring seal containing an elastic ring mating on the outer surface with the inner surface bushings and a ring holder located in the groove fixed tightly on the shaft, characterized in that, in order to increase the reliability of the seal, it is additionally equipped with elastic rings and ring holders made in the form similar to those available, while these ring holders are sealed on the shaft and joined along the end surfaces, and the elastic rings are located in the grooves of the ring holders with the possibility of axial movement and are interconnected by dividing bushes, and in the elastic rings on the outer surface grooves are made in which are installed sealing rubber rings.