Reciprocating pump is divided into hydraulic end and power end, specifically by the following components. First, the pump cylinder pump cylinder is to form a compressed volume to achieve liquid compression of the main components, in order to withstand the liquid pressure, there should be sufficient strength, due to the piston movement in which the inner wall to withstand friction, should have good lubricity and wear resistance. Second, the piston assembly Piston assembly, including piston, piston rod and piston rings. They reciprocate in the pump cylinder and act as a compressed fluid. Piston assembly usually require the structure and materials in ensuring the strength, stiffness, connection reliability conditions, to minimize weight, reduce friction, and require a good seal. Third, the stuffing box It is to prevent the pump cylinder liquid through the piston rod and pump cylinder gap leakage components. The basic requirement is good sealing and wear resistance. Fourth, the valve includes suction valve and discharge valve. Its role is to control the liquid in a timely manner inhalation and discharge pump cylinder. The quality of the valve is directly related to the economy and reliability of the reciprocating pump operation. Fifth, the crankshaft It is an important reciprocating pump moving parts. It drives the crankshaft's own rotary movement into a circular movement of the crankpin (part of the crank). Due to the greater alternating load and friction and wear, so the fatigue strength and wear resistance of the higher. Sixth, connecting rod connecting rod is a crosshead (or piston) parts. It converts the rotational motion of the crankshaft into reciprocating motion of the piston and transmits the external input power to the piston assembly. Seven, crosshead It is connected to the piston rod and connecting rod components. It reciprocates in the guide rail and transmits the power of the connecting rod to the piston part. The basic requirements for the crosshead are light weight, wearable and have enough strength.
