Main classification of pumps

Main classification of pumps

According to the principle of work

1. Positive displacement pump
   By the movement of the working part, the working volume increases and decreases periodically, and the liquid is sucked and drained, and by the extrusion of the working part, the pressure of the liquid can increase directly.
   According to the motion of the different parts of the movement is divided into: reciprocating pump and rotary pump two types.
   According to the different structure of moving parts: piston pump and plunger pump, gear pump, screw pump, vane pump and water ring pump.
2. Impeller pump
   Impeller type pump is driven by the impeller liquid high-speed rotation and mechanical energy transfer to the liquid transport.
   According to the characteristics of the pump impeller and runner structure of different impeller types can be divided into:
   1) Centrifugal pump (Headpump)
   2) Axial pump
   3) Mixed-flow pump
   4) Peripheral pump
3. Jet Pump
   The ejecting fluid is generated by the high speed jet flow generated by the working fluid, and then the energy of the ejecting fluid is increased by momentum exchange.
   The pump can also be divided into:
   1) Vertical pump
   2) Horizontal Pump
   According to the number of suction holes, it is divided into:
   1) Single suction pump
   2) Double suction pump
   According to the prime mover to drive the pump:
   1) Motor pump
   2) Steam turbine pump
   3) Diesel Pump
   4) Diaphragm pump
   The working principle of
   The impeller is installed in the pump housing and fastened to the pump shaft, which is directly driven by the motor.
   There is a liquid pipette in the center of the pump housing.
   The liquid enters the pump through the bottom valve and suction pipe.
   The liquid discharge outlet on the pump case is connected with the discharge pipe.
   Before the pump starts, the pump shell is filled with the liquid to be delivered;
   After starting, the impeller is driven by the shaft to rotate at high speed, and the liquid between the blades must also rotate.
   Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gets energy, leaving the outer edge of the impeller at a high speed and entering the volute pump housing.
   In the volute, the liquid slows down due to the gradual expansion of the flow passage, converts part of the kinetic energy into static pressure energy, and finally flows into and out the pipe at a higher pressure and is sent to the place where it is needed.
   When the liquid flows from the center of the impeller to the outer edge, a certain vacuum is formed in the center of the impeller. Because the pressure above the liquid level of the storage tank is greater than the pressure at the pump inlet, the liquid is continuously pressed into the impeller.
   Visible, as long as the impeller constantly rotating, liquid will be constantly inhaled and discharged.
   Linear pump working principle is different from any other pump, is the use of magnetic levitation principle and spiral circulation physical structure to achieve fluid propulsion, that is, to cancel the shaft, shaft connection, shaft sealing structure.
   After starting, the current is converted into a magnetic field, and the magnetic field force drives the spiral ring to operate, that is, the spiral ring lifts the fluid forward.