The structure and characteristics of Horizontal Multistage Pump



Horizontal Multistage Pump is mainly a horizontal axially split volute multistage centrifugal pump, which is the BB3 pump in API610. This pump is mainly suitable for transporting media without solid particles. Therefore, this kind of pump can be used in petroleum, chemical and electric power industries, such as delayed coking in petrochemicals, medium-sized boiler feed water in thermal power plants, etc. This type of pump is very convenient in terms of maintenance, so it has been widely used in related industries. This article mainly analyzes some design methods and related experience of SCSK series pump horizontal split multi-stage pumps.

Horizontal Multistage Pump

Horizontal Multistage Pump design and structure process characteristics. Generally, the main components of SCSK series pumps are the pump body, impeller, shaft, sealing ring and return pipe. Composed of pressing out chamber, multi-stage volute and inter-stage flow channel, the whole pump body is composed of upper pump body and lower pump body. The main shaft of this kind of pump is generally thick, so to improve the anti-cavitation performance of the first-stage impeller, it is generally necessary to increase the diameter of the impeller inlet.

In the process of the horizontal Multistage Pump structure design, the selection of the operating clearance is also an important part of the design, because the axial size of this type of pump is relatively large, so it is necessary to use high-strength shaft materials, and consider the fluid The effect of rigid support will produce different results, so the running clearance needs to be carefully selected. The operating clearance generally needs to be determined by considering factors such as the temperature of the pumped liquid, the suction conditions, the nature of the liquid, and the efficiency of the pump.