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Cryogenic Liquid Pump Working Principle

Jun 10, 2018

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.