CN203297163U

CN203297163U - Special centrifugal pump for mine

Info

Publication number: CN203297163U
Application number: CN201320269454XU
Authority: CN
Inventors: 章启党
Original assignee: Anhui Sanhuan Pump Co Ltd
Current assignee: Anhui Sanhuan Pump Co Ltd
Priority date: 2013-05-16
Filing date: 2013-05-16
Publication date: 2013-11-20
Anticipated expiration: 2023-05-16

Abstract

The utility model discloses a special centrifugal pump for a mine. The special centrifugal pump comprises a pump body and a pump shaft, wherein a balance plate and a balance disc are fixedly arranged on the pump shaft in a sleeved mode, a backing ring is arranged between the balance plate and a water outlet section of the pump body in a backing mode, the side wall of the balance disc is fixedly connected with a balance bushing ring, the friction faces between the balance bushing ring and the balance plate are respectively provided with a cobalt-based RC alloy layer in a surfacing mode, and the thickness of the cobalt-based RC alloy layer is 6-8mm. On the premise that the thickness is unchanged, service life of a balance device can be nearly doubled, namely the service life increases from 4000 hours before to 7000 hours.

Description

The mining special multistage centrifugal pump

Technical field

The utility model relates to a kind of centrifugal pump field, specifically belongs to the mining special multistage centrifugal pump.

Background technique

Centrifugal pump is that flowing medium enters from blade rotor root (import), and medium relies on the high speed rotating blade to obtain centrifugal force, produces a high pressure, from the medium transport equipment of pressure relief opening (outlet) outflow.Multistage centrifugal pump is that the plural pump with said function is gathered together, on fluid channel structure, the medium pressure relief opening that shows the first order communicates with the import of the second level, and the medium pressure relief opening of the second level communicates with the import of the third level, and so the mechanism of series connection has formed multistage centrifugal pump.The meaning of multistage centrifugal pump is to improve setting pressure.

The multistage centrifugal pump of prior art, the wear phenomenon between balance hoop and balance plate is very serious, needs frequent renewal part.

The model utility content

The purpose of this utility model is to provide a kind of mining special multistage centrifugal pump, under the constant prerequisite of thickness, is nearly doubled the working life of Equilibrator, namely by former 4000 hours, is increased to 7000 hours.

The technical solution of the utility model is as follows:

The mining special multistage centrifugal pump, include the pump housing, pump shaft, on pump shaft, fixed cover is equipped with balance plate, Balance disc, be equipped with gasket ring between the water exit end of balance plate and the pump housing, be fixedly connected with balance hoop on the Balance disc sidewall, on balance hoop and balance plate rubbing surface each other respectively built-up welding cobalt-based RC alloy-layer is arranged, the thickness of cobalt-based RC alloy-layer is 6-8mm.

Described balance plate is fixedly linked on the water exit end of the pump housing by adjusting bolt.

Compared with prior art, the utility model has following advantage:

On surface of contact built-up welding plasma high abrasion cobalt-based gold Rc alloy, under the constant prerequisite of thickness, nearly doubled the working life of Equilibrator, namely by former 4000 hours, be increased to 7000 hours.

2. after the rubbing surface of balance plate and two contact components of balance hoop is thickeied simultaneously, make extend again one times the working life of Equilibrator.

3. advance balance plate to move axially to the pump head direction by adjusting bolt, for guaranteeing the normal running clearance between balance plate and balance hoop.Design pad (spacer thickness 1mm) and determined to increase the quantity of pad according to the distance that advances, make balance plate by pad and water exit end inwall close contact, guaranteeing can be effectively stressed when balance plate and balance hoop operation friction are clashed into, allow pump be in optimal operational condition, the operational efficiency of pump significantly improves.

Description of drawings

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

Embodiment

Referring to accompanying drawing, the mining special multistage centrifugal pump, include the pump housing 1, pump shaft 2, on pump shaft 2, fixed cover is equipped with balance plate 3, Balance disc 4, be equipped with gasket ring 5 between the water exit end of balance plate 3 and the pump housing 1, be fixedly connected with balance hoop 6 on Balance disc 4 sidewalls, on balance hoop 6 and balance plate 3 rubbing surface each other respectively built-up welding cobalt-based RC alloy-layer is arranged, the thickness of cobalt-based RC alloy-layer is 6-8mm, and balance plate 3 is fixedly linked on the water exit end of the pump housing 1 by adjusting bolt 8.

Claims

1. mining special multistage centrifugal pump, include the pump housing, pump shaft, it is characterized in that, on pump shaft, fixed cover is equipped with balance plate, Balance disc, be equipped with gasket ring between the water exit end of balance plate and the pump housing, be fixedly connected with balance hoop on the Balance disc sidewall, on balance hoop and balance plate rubbing surface each other respectively built-up welding cobalt-based RC alloy-layer is arranged, the thickness of cobalt-based RC alloy-layer is 6-8mm.

2. mining special multistage centrifugal pump according to claim 1, it is characterized in that: described balance plate is fixedly linked on the water exit end of the pump housing by adjusting bolt.