CN210484075U

CN210484075U - Balanced wear-resisting type multistage centrifugal pump

Info

Publication number: CN210484075U
Application number: CN201921375879.2U
Authority: CN
Inventors: 刘中纯; 蒋仁杰
Original assignee: Jiangsu Changjiang Water Pump Co ltd
Current assignee: Jiangsu Changjiang Water Pump Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-05-08
Anticipated expiration: 2029-08-22

Abstract

The utility model provides a balanced wear-resistant multistage centrifugal pump, which comprises a pump body and a pump shaft, wherein a balancing part comprises a balancing disk and a balancing bush; the contact position of the balance disc and the balance bushing is provided with a wear-resisting ring, the wear-resisting ring comprises a wear-resisting inner ring and a wear-resisting outer ring, the wear-resisting inner ring is fixed on the inner end face of the wear-resisting ring, the wear-resisting outer ring is fixed on the outer end face of the balance bushing, and the wear-resisting inner ring is abutted to the end face of the wear-resisting outer ring. The utility model has the advantages of reasonable design, shift the friction between original balance bush and the balance disk to between wear-resisting outer loop and the wear-resisting inner ring, improved the wear resistance between balance disk and the balance bush, and maintain and change the convenience, only need correspond to change wear-resisting outer loop or wear-resisting inner ring, the maintenance cost is low, long service life.

Description

Balanced wear-resisting type multistage centrifugal pump

Technical Field

The utility model relates to a centrifugal pump technical field especially relates to a balanced wear-resisting type multistage centrifugal pump.

Background

The multistage centrifugal pump integrates more than two centrifugal pumps with the same function, and the fluid channel structure is characterized in that a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, and a medium pressure relief opening of the second stage is communicated with an inlet of a third stage, so that the multistage centrifugal pump is formed by a mechanism connected in series. At the position of the water outlet end of the centrifugal pump, a balance mechanism is usually designed between the water outlet section and a water outlet pump cover positioned at the outer end of the water outlet section, the balance mechanism usually comprises a balance disc and a balance bush, the balance disc is close to the direction of the water outlet section along the circumferential direction of the pump shaft and is an inner side, the balance disc is far away from the direction of the water outlet section and is an outer side, the balance disc is fixed outside the pump shaft in a surrounding manner, the outer end of the balance disc is abutted against the end face of the water outlet pump cover, and the balance bush is fixed with the. In the operation, the water outlet section is fixed, the balance bush is fixed with the water outlet section, the balance disc is fixed with the pump shaft and rotates along with the pump shaft, and in the rotation, the balance disc and the balance bush are easily abraded, so that the service life of the centrifugal pump is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to overcome the not enough of prior art, the utility model provides a structural design is reasonable, effectively improves the wear resistance between balance disc and the balanced bush, and it is lower to maintain convenient and maintenance cost, long service life's wear-resisting type multistage centrifugal pump of balance.

The utility model provides a technical scheme that its technical problem adopted is: a balanced wear-resistant multistage centrifugal pump comprises a pump body and a pump shaft which rotates and is connected in the pump body in a penetrating manner, wherein the pump body comprises a water inlet pump cover, a water inlet section, an impeller part, a water outlet section and a water outlet pump cover which are sequentially connected, a balance part arranged around the pump shaft is also arranged between the water outlet section and the water outlet pump cover, the balance part comprises a balance disc and a balance bush, the balance disc is sleeved and fixed on the pump shaft and is abutted against the inner side end face of the water outlet pump cover, a throttling shaft sleeve is sleeved on the pump shaft corresponding to the inner side position of the balance disc, the outer peripheral face of the throttling shaft sleeve is provided with a balance bush in a surrounding manner, and the inner side end face of the balance bush is; the balance disc is provided with a wear-resistant ring at the contact position with the balance bush, the wear-resistant ring comprises a wear-resistant inner ring and a wear-resistant outer ring, the wear-resistant inner ring is fixed on the inner end face of the wear-resistant ring, the wear-resistant outer ring is fixed on the outer end face of the balance bush, and the wear-resistant inner ring is abutted to the end face of the wear-resistant outer ring.

Preferably, the balance disc and the balance lining are made of nickel-based alloy materials. The nickel-based alloy material has good wear resistance, is arranged on the balance disc and the balance bushing, can replace the contact friction part of the balance disc and the balance bushing, improves the wear resistance and prolongs the service life

Furthermore, in order to facilitate the connection and fixation of the wear-resistant ring with the balance disc and the balance bushing, a fixing hole is formed in the end face of the outer side of the wear-resistant inner ring and is fixedly connected with the balance disc through the fixing hole, and a fixing hole is formed in the end face of the inner side of the wear-resistant outer ring and is fixedly connected with the balance bushing through the fixing hole.

The beneficial effects of the utility model are that, the utility model provides a balanced wear-resisting type multistage centrifugal pump, structural design is reasonable, designs wear-resisting outer ring on the balance bush, designs wear-resisting inner ring on the balance dish, shifts the friction between original balance bush and the balance dish to between wear-resisting outer ring and the wear-resisting inner ring, has improved the wear resistance between balance dish and the balance bush, and maintains the change convenience, only needs to correspond to change wear-resisting outer ring or wear-resisting inner ring, and the maintenance cost is low, long service life.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the preferred embodiment of the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

In the figure, the water outlet pump cover 1, the water outlet section 3, the balance disc 4, the throttle shaft sleeve 5, the balance bush 6, the wear-resistant outer ring 7, the wear-resistant inner ring 8 and the pump shaft.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The balance wear-resistant multistage centrifugal pump as shown in fig. 1 and 2 is the best embodiment of the invention, and comprises a pump body and a pump shaft 8 which rotates and is connected in the pump body in a penetrating way. The pump body comprises a water inlet pump cover, a water inlet section, an impeller part, a water outlet section 2 and a water outlet pump cover 1 which are sequentially connected.

The balance part is arranged between the water outlet section 2 and the water outlet pump cover 1 and surrounds the pump shaft 8, the balance part comprises a balance disc 3 and a balance bush 5, the outer sleeve of the balance disc 3 is fixed on the pump shaft 8 and is abutted against the inner side end face of the water outlet pump cover 1, the inner side position of the pump shaft 8, corresponding to the balance disc 3, is further sleeved with a throttling shaft sleeve 4, the outer peripheral face of the throttling shaft sleeve 4 is surrounded with the balance bush 5, and the inner side end face of the balance bush 5 is fixed with the outer side end face of the water outlet section 2.

And a wear-resisting ring is arranged at the contact position of the balance disc 3 and the balance bushing 5, and comprises a wear-resisting inner ring 7 and a wear-resisting outer ring 6. In order to facilitate the connection and fixation of the wear-resistant ring with the balance disk 3 and the balance bushing 5, a fixing hole is formed on the end surface of the outer side of the wear-resistant inner ring 7 and is fixedly connected with the balance disk 3 through the fixing hole. The end surface of the inner side of the wear-resistant outer ring 6 is provided with a fixing hole and is fixedly connected with the balance bush 5 through the fixing hole. The wear-resistant inner ring 7 is abutted against the end face of the wear-resistant outer ring 6.

In practical design, the balance disc 3 and the balance bush 5 are made of nickel-based alloy materials. The nickel-based alloy material is added with chromium element, the surplus chromium is easy to form chromium carbide and chromium boride hard phase with carbon and boron, thereby improving the alloy hardness and the wear resistance, and the chromium-based alloy material is arranged on the balance disc 3 and the balance bush 5 as a wear-resistant element to replace the contact friction part of the balance disc 3 and the balance bush 5, avoiding the friction damage of the balance disc 3 and the balance bush 5, improving the wear resistance and prolonging the service life.

The balanced wear-resistant multistage centrifugal pump is reasonable in structural design, the wear-resistant outer ring 6 is designed on the balance bush 5, the wear-resistant inner ring 7 is designed on the balance disc 3, the friction between the original balance bush 5 and the original balance disc 3 is transferred between the wear-resistant outer ring 6 and the wear-resistant inner ring 7, the wear resistance between the balance disc 3 and the balance bush 5 is improved, the maintenance and the replacement are convenient, only the wear-resistant outer ring 6 or the wear-resistant inner ring 7 needs to be replaced correspondingly, the maintenance cost is low, and the service life is long.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a balanced wear-resisting type multistage centrifugal pump, includes the pump body and rotates and pump shaft (8) of through connection in the pump body, the pump body including the pump cover that intakes that connects gradually, intake section, impeller part, go out water section (2) and go out water pump cover (1), play water section (2) and go out between water pump cover (1) and still be equipped with the balanced part that encircles pump shaft (8) setting, its characterized in that: the balance part comprises a balance disc (3) and a balance bush (5), the balance disc (3) is sleeved and fixed on the pump shaft (8) and is abutted against the end face of the inner side of the water outlet pump cover (1), the pump shaft (8) is further sleeved with a throttling shaft sleeve (4) at the position corresponding to the inner side of the balance disc (3), the balance bush (5) is arranged on the outer peripheral surface of the throttling shaft sleeve (4) in a surrounding mode, and the end face of the inner side of the balance bush (5) is fixed with the end face of the outer side of the water outlet section (2); the balance disc (3) is provided with a wear-resistant ring at the contact position with the balance bushing (5), the wear-resistant ring comprises a wear-resistant inner ring (7) and a wear-resistant outer ring (6), the wear-resistant inner ring (7) is fixed on the inner end face of the wear-resistant ring, the wear-resistant outer ring (6) is fixed on the outer end face of the balance bushing (5), and the wear-resistant inner ring (7) is abutted to the end face of the wear-resistant outer ring (6).

2. The balanced, wear-resistant, multistage centrifugal pump of claim 1, wherein: the balance disc (3) and the balance bushing (5) are made of nickel-based alloy materials.

3. The balanced, wear-resistant, multistage centrifugal pump of claim 1, wherein: the end face of the outer side of the wear-resistant inner ring (7) is provided with a fixing hole and is fixedly connected with the balance disc (3) through the fixing hole, and the end face of the inner side of the wear-resistant outer ring (6) is provided with a fixing hole and is fixedly connected with the balance lining (5) through the fixing hole.