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Definition of water pump
Water pump is a kind of hydraulic machinery that converts energy. It converts the mechanical energy of the prime mover (such as an electric motor) into the kinetic and potential energy of the liquid. To transport and improve the purpose of liquid.
Due to the variety of pumps, the classification methods are also different. Usually, the pumps are divided into three types according to their working principles.
1.2.1 Vane water pump
The pumping of the liquid by the vane pump is completed by the high-speed rotation of the impeller equipped with blades. According to the water flow direction of the impeller, the vane pump can be divided into three types: radial flow, axial flow and oblique flow. A pump with a radial impeller is called a centrifugal pump. The flow of liquid particles in the impeller is mainly affected by centrifugal force. The water pump with active flow impeller is called axial flow pump, and the liquid particle is mainly affected by the pumping force when flowing in Mt-wheel. The water pump with oblique flow impeller is called mixed flow pump, which is the transition form of the above two impellers. When the liquid particle flows in the impeller. Both by the centrifugal force. It is also subject to period lift.
1.2.2 Volusible water pump
The pressure delivery of the liquid by the volumetric pump is accomplished by the change of the cellar volume in the working room inside the pump. There are two ways to change the volume of the working chamber: injection and rotation. Belong to the reciprocating motion of the positive displacement water pump piston reciprocating pump, plunger type injection pump, etc.; Belong to the rotary motion of the positive displacement water pump rotor pump.
The schematic diagram of the working principle of the positive displacement water pump is shown in Figure 1.2. When the piston is pulled to the right, the working volume increases, the pressure decreases, the inlet valve opens, the outlet valve closes, and the water in the suction pool is under atmospheric pressure.
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