CN202612072U - Mechanical sealing member for pump - Google Patents

Abstract

A mechanical sealing element for a pump comprises a moving ring, a static ring, a spring, a spring seat and a shaft sleeve, and is characterized in that the moving ring, the static ring and the spring seat are coaxially arranged; the spring seat is fastened on the shaft sleeve through a screw; the spring is mounted in the spring seat; a push ring, a wedged ring and the moving ring are sequentially mounted at the other end of the spring; the moving ring is matched with the wedged ring through an annular inclined plane; a snap ring is arranged between the moving ring and the spring seat; the static ring is arranged on the shaft sleeve in a sleeving way; the static ring is mutually contacted with one lateral surface of the moving ring; and a pin used for preventing the static ring from rotating is arranged between the static ring and an external support body. The mechanical sealing element provided by the utility model has the characteristics of favorable sealing effect and simple structure, can adapt to application occasions of petroleum, chemical engineering and acid and alkali industrial pumps and has wide application performance.

Description

A kind of mechanical seal for pump spare

Technical field

The utility model relates to the mechanical sealing technology field, specifically a kind of mechanical seal for pump spare.

Background technique

Mechanical seal is to lean on a pair of or several the end face of making slide relative perpendicular to axle to be kept down fitting and is equipped with auxiliary seal and reaches the gland seal device that hinders leakage in elastic force (or magnetic force) effect of hydrodynamic pressure and compensation mechanism.Be made up of elements such as stationary ring, rotating ring, elastic element, spring seat, Cock screw, auxiliary seal rings as the one of which, whether rotating ring and stationary ring can have the nose balance ability according to them toward contact is called compensated loop or non-compensation also.

The end face of rotating ring and stationary ring is fitted each other and is done the motive sealing of slide relative, and it is the primary seal in the mechanical seal device, also is the decision mechanical sealing performance and the key in life-span.Therefore, very high to the processing request of seal face, keep necessary lubricating liquid film between seal face in order to make simultaneously, the compressive load per unit area on the necessary strict chamber system end face, pressure is excessive, is difficult for forming stable lubricating liquid film, can quicken the wearing and tearing of end face; Pressure is too small, and leakage rate can increase.So will obtain excellent sealing performance has enough life-spans again, when design and installation mechanical seal, must guarantee that end face compressive load per unit area value is in optimal scope.

Wherein the axial region position in centrifugal pump, chemical pump, pipeline mounted pump and various anti-corrosive pump need use mechanical seal to guarantee the proper functioning of pump, and present single mechanical end face seal part structure is optimized inadequately, also has further improved space.

The model utility content

The purpose of the utility model is to provide a kind of mechanical seal for pump of single end face, is used to improve its combination property through architecture advances.

The technological scheme that its technical problem of the utility model solution is taked is: a kind of mechanical seal for pump spare, comprise rotating ring, stationary ring, spring, spring seat and axle sleeve, and it is characterized in that,

The coaxial setting of said rotating ring, stationary ring and spring seat; And said spring seat is fastened on the axle sleeve through screw; Mounting spring in said spring seat, the spring the other end is installed throw-out collar, wedge-like ring and rotating ring successively, and the inclined-plane through ring-type cooperates between said rotating ring and the wedge-like ring; Rotating ring between said rotating ring and spring seat, is provided with a snap ring, so can axially done the straight line relative movement with respect to spring seat;

Said stationary ring is nested with on axle sleeve, and a side of said stationary ring and rotating ring is in contact with one another, and between said stationary ring and external bracing body, is provided with the pin that prevents that stationary ring from rotating.

The beneficial effect of the utility model is: the utlity model has good sealing effect, characteristic of simple structure, can satisfy the application of oil, chemical industry, acid-base class industrial pump, have the extensive applicability ability.

Description of drawings

Fig. 1 is the whole-cutaway view of the utility model;

Among the figure: 1 rotating ring, 2 stationary rings, 3 springs, 4 spring seats, 41 screws, 5 axle sleeves, 6 throw-out collars, 7 wedge-like rings, 8 inclined-planes, 9 snap rings, 10 pins.

Embodiment

As shown in Figure 1, a kind of mechanical seal for pump spare comprises rotating ring 1, stationary ring 2, spring 3, spring seat 4 and axle sleeve 5 critical pieces.

Rotating ring 1, stationary ring 2 and spring seat 4 are ring bodies, the coaxial setting of rotating ring, stationary ring and spring seat.Spring seat 4 is fastened on the axle sleeve 5 through screw 41, between spring seat and axle sleeve, forms a cavity.Mounting spring 3 in the cavity in spring seat 4; The spring the other end is installed throw-out collar 6, wedge-like ring 7 and rotating ring 1 successively; Throw-out collar and wedge-like ring all are ring bodies, and the inclined-plane 8 through ring-type cooperates between rotating ring and the wedge-like ring, between rotating ring and spring seat, are provided with a snap ring 9; But rotating ring is with respect to the relative movement of spring seat straight line like this, and under the pretightening force of spring, remains on dynamic balance.

Stationary ring 2 is nested with on axle sleeve 5, and a side of stationary ring and rotating ring is in contact with one another, and is mechanical dynamic sealing position, and between stationary ring and external bracing body, is provided with the pin 10 that prevents that stationary ring from rotating, and accomplishes mechanical seal.

Except that the described technical characteristics of specification, be the known technology of those skilled in the art.

Claims (1)

1. a mechanical seal for pump spare comprises rotating ring, stationary ring, spring, spring seat and axle sleeve, it is characterized in that,

The coaxial setting of said rotating ring, stationary ring and spring seat; And said spring seat is fastened on the axle sleeve through screw; Mounting spring in said spring seat, the spring the other end is installed throw-out collar, wedge-like ring and rotating ring successively, and the inclined-plane through ring-type cooperates between said rotating ring and the wedge-like ring; Rotating ring between said rotating ring and spring seat, is provided with a snap ring, so can axially done the straight line relative movement with respect to spring seat;

Said stationary ring is nested with on axle sleeve, and a side of said stationary ring and rotating ring is in contact with one another, and between said stationary ring and external bracing body, is provided with the pin that prevents that stationary ring from rotating.

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