CN200946589Y - Centrifugal pump - Google Patents

Abstract

The utility model provides a centrifugal pump, comprising a pump body, a pump lid, supporting feet, an impeller and a shaft, wherein the pump lid hole is provided with a stationary seat having a fixed stationary ring; the shaft is provided with a sleeve, which has two retainers and a spring, one side of one retainer has a push ring and a rotary ring which connects with end surface of the stationary ring; an O-shaped sealing ring is provided between the stationary seat and the shaft sleeve, and two O-shaped sealing rings are provided between the pump lid and the retaining ring and the push ring. The auxiliary sealing device adopts a combining structure of diaphragms and O-shaped rings, preventing contact between the spring and the conveying media and avoiding the spring failure caused by crystallization of the media; in addition, the sealing device does not need external connected cooling water, therefore reducing the mounting complexity and decreasing leakage points.

Description

A kind of centrifugal pump

Technical field

The utility model relates to a kind of mechanical field, particularly a kind of single stage single suction cantilever type centrifugal pump.

Background technique

Original centrifugal pump adopts built-in mechanical seal, can only be used for carrying the medium of free from admixture, no crystallization, and this centrifugal pump need be installed external chilled water unit, and is strict to external cooling water.Therefore, the centrifugal pump in the background technique can't be carried impurity or the medium of crystallization is arranged, and installation difficulty is big, and increase the leak point.

Summary of the invention

Goal of the invention of the present utility model is exactly to provide a kind of centrifugal pump that can carry impurity, external chilled water unit need not be installed for society.

The technical solution of the utility model is that this is existing like this: a kind of centrifugal pump, constitute by the pump housing, pump cover, leg, impeller and axle and the axle sleeve that is installed on the axle, fixedly be equipped with the stationary seat of band stationary ring on the axle sleeve, fixedly be equipped with positioning ring on the pump cover, be equipped with throw-out collar in the positioning ring, throw-out collar one end is equipped with and the contacted rotating ring of stationary ring end face.

Also be equipped with spring and two retainers on the axle sleeve, one of them retainer is fixedlyed connected with pump cover, and retainer contacts with throw-out collar.

Be respectively equipped with O type circle between positioning ring and pump cover, the throw-out collar, be provided with O type circle between axle sleeve and the stationary seat.

The beneficial effects of the utility model are: because auxiliary sealing device adopts barrier film and O type circle fabricated structure, can avoid contacting of spring and fed sheet of a media, prevent because the crystallization of medium causes the inefficacy of spring, the sealing device does not need to add external cooling water simultaneously, reduce installation difficulty, reduce the leak point.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Part explanation: 1, the pump housing, 2, impeller, 3, axle, 4, pump cover, 5, spring, 6, axle sleeve, 7, retainer, 8, retainer, 9, throw-out collar, 10, rotating ring, 11, O type circle, 12, O type circle, 13, O type circle, 14 legs, 15, stationary ring, 16, stationary seat, 17, positioning ring.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described: a kind of centrifugal pump, constitute by the pump housing 1, pump cover 4, leg 14, impeller 2 and axle 3 and the axle sleeve 6 that is installed on the axle 3, fixedly be equipped with the stationary seat 16 of band stationary ring 15 on the axle sleeve 16, fixedly be equipped with positioning ring 17 on the pump cover 4, be equipped with throw-out collar 9 in the positioning ring 17, throw-out collar 9 one ends are equipped with and the contacted rotating ring 10 of stationary ring 16 end faces.Also be equipped with retainer 7,8 and spring 5 on the axle sleeve 6, retainer 8 is fixedlyed connected with pump cover 4, and retainer 7 contacts with throw-out collar 9.Be provided with O type circle 11,12 between positioning ring 17 and pump cover 4, the throw-out collar 9, be provided with O type circle 13 between axle sleeve 6 and the stationary seat 16.Because spring 5 is used for by throw-out collar 9, throw-out collar 9 promotes rotating ring 10, to guarantee between rotating ring 10 and the stationary ring 15 certain tight power of giving being arranged, to realize sealing.Spring 5 designs do not contact with the medium of being carried in the outside of pump cover 4, and therefore, this centrifugal pump can be carried the medium of impurity or crystallization, and need not external cooling water.

Claims (3)

1, a kind of centrifugal pump, constitute by the pump housing (1), pump cover (4), leg (4), impeller (2) and axle (3), it is characterized in that in pump cover (4) hole, being provided with stationary seat (16), stationary seat (16) is gone up and fixedly is equipped with stationary ring (15), establish axle sleeve (6) on the axle (3), axle sleeve (6) is provided with retainer (7), (8), spring (5), retainer (8) one sides are established throw-out collar (9), rotating ring (10), and rotating ring (10) contacts with stationary ring (15) end face.

2, a kind of centrifugal pump according to claim 1 is characterized in that establishing O RunddichtringO (13) between stationary seat (16) and the axle sleeve (6).

3, a kind of centrifugal pump according to claim 1 and 2 is characterized in that fixedly establishing positioning ring (17) on the pump cover (4), establishes O RunddichtringO (11), (12) between pump cover (4) and positioning ring (17), positioning ring (17) and the throw-out collar (9).

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