Cryogenic Liquid Pump Working Principle
1 The reciprocating cryogenic pump consists of two parts: the pump body and the prime mover. The pump body can be divided into two major parts: the hydraulic end and the transmission end.
2 The role of the hydraulic end (also called the pump head) is to compress the cryogenic liquid in the pump body so that the mechanical energy is converted into the liquid internal energy and the pressure of the discharged liquid is increased.
3 The role of the transmission end is to input the motive power of the prime mover through the speed reduction mechanism and turn the rotary motion into reciprocating motion through the link mechanism.
4 When the cold (or plunger) moves from left to right, the volume in the pump cylinder increases, and the pressure decreases. When the liquid pressure in the inlet pipe is greater than the pressure in the pump cylinder, the liquid is under pressure differential. , Open the suction valve and enter the pump cylinder. The crank on the gearbox turns 180º the live cold moves to the left. As the cryogenic liquid is essentially incompressible, the cryogenic liquid is immediately compressed by the piston and the pressure rises rapidly. Until the pressure of the liquid in the pump cylinder is large enough to open the discharge valve, the cryogenic liquid is output to the discharge conduit through the discharge valve. When the piston is pulled by the crank and moved to the right, the above process is repeated.
5 The first half cycle of the reciprocating cryogenic pump is to inhale the cryogenic liquid, and only the latter half cycle has the cryogenic liquid discharged. Draining is intermittent and non-continuous.
6 The hydraulic end mainly consists of suction valve (or suction window), discharge valve, pump cylinder and cylinder sleeve, piston (plunger), sealer, various connecting pipes and compensating pipes.