Sections of multistage centrifugal pump main type and flow components is introduced

The main sections of multistage centrifugal water pump flow components with suction chamber, impeller and pressurized water chamber. Suction chamber is located in the front of impeller inlet, have the effect of the liquid to the impeller; Pressurized water chamber are spiral pressure water chamber ( Volute) Guide vane, guide vane, and space three forms; Impeller pump is of the most important element, is the core of the flow components heart, impeller composed of cover plate and in the middle of the blade. Of liquid through the impeller pump work, allow it to increase energy.

       （ 1) Suction chamber: the impeller before import, its purpose is to introduce the liquid from the suction pipe, the impeller for the flow of the liquid flow through the suction chamber loss is small, and make the liquid flow into the impeller when the velocity distribution is uniform;

       （ 2) Impeller: is the work parts in centrifugal pump, the impeller requirement is that in the case of loss minimum unit weight of the liquid to obtain a high energy;

       （ 3) Volute: located at the impeller outlet, its function is to put the liquid collected from escaping from the impeller, and put it in a certain requirements into the lower impeller or into the discharge pipe.

sections of main flow components of multistage centrifugal pump impeller

is an important work of the pump impeller pump parts, its shape, size and processing technology has a decisive influence on pump performance. The role of the pump impeller is the prime mover input energy to the liquid. The shape and size of the pump impeller and the pump performance has a close relationship. The water pump impeller can generally be divided into single suction and double suction type two kinds. Single suction impeller for unilateral absorbing water, small flow water pump impeller for this form. On both sides of the double suction impeller for water absorption, large flow pump impeller adopts double suction impeller.

impeller according to the direction of liquid flow is divided into three categories:

1) Radial flow impeller ( Centrifugal impeller) Liquid is along a direction perpendicular to the axis of outflow impeller.

       ( 2) Oblique flow impeller ( Mixed flow impeller) Liquid along the axis is tilted in the direction of the impeller.

       ( 3) Axial direction parallel to the axis of the flow of fluid in the impeller.

way suction impeller is divided into two categories:

1) The single suction impeller ( The impeller suction liquid from the side) 。

       ( 2) Double suction impeller ( On both sides of the impeller from inhaling liquid) 。

impeller press flat form is divided into three categories:

1) Closed impeller.

       ( 2) Open type impeller.

       ( 3) Half open impeller. The closed impeller is widely applied, the single suction double suction impeller impeller are belong to this form.

there are three kinds of main pump impeller structure forms: before and after have called closed impeller cover plate. Only HouGaiBan called half open impeller. Excellent HouGaiBan called open impeller. The structure of leaf also can be divided into two kinds of cylindrical blades and twisted blade. Centrifugal pump of pump impeller blade is commonly after curved blade. Blade has cylindrical and distorted form two kinds, application of twisted blade can reduce the load on the blade, and improves centrifugal pump inhalation can improve the ability of resistance to cavitation, but manufacturing is difficult, the cost is higher. Water pump impeller refining chemical centrifugal pump impeller to casting or full welding seam overall pump impeller. impeller welding is developed in recent years, more than used for casting the worse performance of metal materials, such as iron and its alloy, manufacturing of chemical use special centrifugal pump. Welding pump impeller geometric accuracy and surface roughness were superior to the casting impeller, is helpful to improve the efficiency of the centrifugal pump. 2 - general closed water pump impeller After 12 curved blade, with high efficiency, such as the single suction and double suction centrifugal pump is adopted the impeller. The single-stage single-suction centrifugal pump impeller with axial force, so some of the impeller blade roots balance hole is open.

the structure of the pump impeller and blade:

half open and open impeller blade number is less, generally for 2 ~ 5, mostly used for pumping slurry liquid granular or sewage, such as sewage pump impeller. In the field of sewage, in order to guarantee delivery medium containing solid particles, such as fiber entanglement when yuan jams, often USES the port type impeller. Water pump impeller material should have enough mechanical strength, and have certain wear-resisting, corrosion resistance. According to the requirements of transmission medium is usually cast iron, cast steel, stainless steel or such as bronze material conveying inflammable and explosive oil pump products all adopt the impeller.

sections of main flow components of multistage centrifugal pump suction chamber type

pump suction chamber is located in the front of the impeller, its role is to put the liquid to the impeller, with straight cone, bending tube and spiral three forms. As shown:

the main sections of multistage centrifugal pump flow components pressurized water chamber type

pressurized water chamber is located in the impeller peripheral, sometimes called the pump body. Its role is to collect from the flow of fluid in the impeller, and most of the kinetic energy is converted into pressure energy, and then into the discharge pipe, the type of pressurized water chamber as shown:

suction chamber and the pressurized water chamber materials should be enough mechanical strength, wear resistance and corrosion resistance, generally USES cast iron, cast steel and stainless steel casting.

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