What are the main characteristics of reciprocating pumps
The main characteristics of the reciprocating pump are: ① high efficiency and wide high efficiency area. ② It can reach very high pressure, and the pressure change hardly affects the flow rate, so it can provide a constant flow rate. ③ It has the suction ability and can transport liquid and gas mixtures. Specially designed can also transport mud and concrete. ④ There is a large pulsation of flow and pressure, especially for single-acting pumps. Due to the acceleration of the piston movement and the intermittent nature of liquid discharge, the pulsation is greater. An air chamber is usually required on the discharge line (and sometimes on the suction line) to make the flow more uniform. The use of double-acting and multi-cylinder pumps can also significantly improve flow non-uniformity. ⑤ The speed is low, the size is large, and the structure is more complicated than that of a centrifugal pump. A special pump valve is required, and the manufacturing cost and installation cost are high. The piston pump is mainly used for water supply, and the manual piston pump is a widely used family life pump. The plunger pump is used to provide a high-pressure liquid source, such as the high-pressure water supply of a hydraulic press. Both the piston pump and the piston pump can be used as drilling mud pumps and oil pumps in oil mines. Diaphragm pumps are particularly suitable for conveying highly toxic, radioactive, corrosive liquids, precious liquids and liquids containing abrasive solids. Diaphragm and plunger pumps can also be used as metering pumps.
Features of reciprocating pump:
1. Strong self-priming ability;
2. The theoretical flow has nothing to do with the working pressure, it only depends on the speed, the size of the pump cylinder and the number of actions;
3. The rated discharge pressure has nothing to do with the size and speed of the pump;
4. Uneven flow;
5. The speed should not be too fast;
6. Not very sensitive to liquid pollution;
7. The structure is more complicated and there are more wearing parts.
