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Understand the principle of the four-column hydraulic press reciprocating oil pump

by:WORLD     2022-11-17
Understand the principle of the four-column hydraulic press reciprocating oil pump



















The four-column hydraulic press reciprocating pump is a fluid machine that mainly changes the inner volume of the working chamber through the reciprocating displacement of the components (piston, plunger, diaphragm, bellows, etc.) The energy for the element to move back and forth comes from various prime movers. The inlet and outlet of the working chamber and the parts communicating with the atmosphere are controlled by the isolation element.





The four-column hydraulic reciprocating pump usually consists of two basic parts, one end is the part that converts mechanical energy into pressure energy and directly transports the liquid, called the hydraulic cylinder part or the hydraulic end; the other end is the power and transmission part, called the transmission end. The hydraulic end of the reciprocating pump consists of a piston (or plunger), a cylinder (pump cylinder), a suction valve, a discharge valve stuffing box and a cylinder head, etc.

The transmission end is mainly composed of crankshaft, connecting rod, crosshead, bearing and frame. The reciprocating pump periodically changes the working volume of the closed liquid cylinder with the reciprocating motion of the reciprocating moving parts in the cylinder, and periodically sucks the sent liquid into the working chamber through the suction check valve, and reciprocates in a closed state. The displacement of the moving part transfers the energy of the prime mover to the liquid to be sent, and directly increases the pressure of the liquid to be sent. After reaching the required pressure value, it is then discharged to the output pipeline of the pump through the liquid discharge check valve. The above process is repeated and circulated to complete the delivery of liquid.





The working process of the reciprocating pump includes alternate suction and discharge processes. At the moment when the piston starts to move to the right from the leftmost position (outer dead center), the discharge valve is closed, the suction valve is opened, and the volume of the working chamber (the hatched part in the figure) ) increases with the rightward movement of the piston, and the liquid in the suction container enters the working chamber under the action of the suction liquid surface pressure until the piston moves to the rightmost position (inner dead center), and the suction process ends.

At the moment when the piston starts to move to the left from the inner dead center, the suction valve is closed, the discharge valve is opened, the volume of the working chamber decreases with the leftward movement of the piston, and the liquid in the chamber is discharged under the pressure of the piston until the piston moves. At the outer dead center, the expulsion process ends, and then another inhalation process begins.

The piston reciprocates once to complete a work. The liquid pressure in the working chamber remains unchanged during the entire suction process, which is equal to the suction pressure buckle. At the moment when the discharge begins, it suddenly increases to the discharge pressure and remains unchanged during the entire discharge process. Until the moment when the inhalation started, it plummeted to Ps again. WORLD Press Machine official website www.pressmachine-world.com, please indicate the source for reprinting!











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