Reciprocating pump is a kind of positive displacement pump. It relies on the reciprocating movement of the piston in the pump cylinder to change the volume of the working chamber, so as to achieve the intention of sucking and discharging liquid.

    How are reciprocating pumps classified?

   (1) According to the movement direction of the piston, it can be divided into vertical pump and horizontal pump;

   (2) According to the structure, it can be divided into single-cylinder, double-cylinder, four-cylinder, etc.;

   (3) According to the shape of the piston, it can be divided into two types: piston pump and plunger pump;

   (4) According to the transmission power, it is divided into electric reciprocating pump, steam reciprocating pump, hydraulic oil reciprocating pump, manual reciprocating pump, etc.

What is the structure of the reciprocating pump?

    Reciprocating pumps generally consist of two parts: the hydraulic end and the transmission end. The hydraulic end mainly includes the main components such as the cylinder block, suction valve, discharge valve, plunger and stuffing box, cylinder head, valve cover and its sealing packing. The transmission end mainly includes cranks, connecting rods, crossheads, bearings, bushes, etc.

    What is the working principle of the reciprocating pump?

    When the piston moves outward, a low pressure is formed in the pump body, the discharge check valve is pressurized and closed, and the suction check valve is pushed open to suck the liquid into the pump. When the piston moves inward, high pressure is formed in the pump, the suction check valve is closed, the discharge check valve opens, and the liquid is discharged out of the pump. The piston continues to reciprocate, and the liquid is continuously sucked or discharged.