The plunger pump is a commonly used hydraulic pump with the following main features:
1. High pressure
The plunger pump achieves oil suction and oil pressure by reciprocating the plunger in the cylinder. The sealing performance between the plunger and the cylinder is good, and a higher pressure can be generated. Under normal circumstances, the working pressure of the plunger pump can reach tens of MPa or even higher, which can meet the needs of some high-pressure systems. For example, in some engineering machinery equipment, such as cranes and excavators, plunger pumps are widely used in hydraulic systems to provide sufficient power and pressure.
2. Convenient flow regulation
The flow of the plunger pump can be adjusted by changing the stroke or speed of the plunger. By adjusting the stroke of the plunger, the flow can be continuously adjusted, and the adjustment range is large. Moreover, the flow of the plunger pump is proportional to the speed, and the flow can also be adjusted by changing the speed. This flow regulation method is convenient and flexible, and can meet the flow requirements under different working conditions. For example, in some machine tool equipment, plunger pumps are often used in feed systems to control the feed speed of the tool by adjusting the flow.
3. High volumetric efficiency
The working principle of the plunger pump is to achieve oil suction and oil pressure through the reciprocating motion of the plunger, and its volumetric efficiency is relatively high. Due to the small gap between the plunger and the cylinder body, the sealing performance is good, which can reduce leakage and improve the volumetric efficiency of the pump. Under normal circumstances, the volumetric efficiency of the plunger pump can reach more than 90%, or even higher. This enables the plunger pump to effectively utilize energy during operation and improve the efficiency of the system.
4. High pressure resistance and strong anti-pollution ability
The structure of the plunger pump is relatively compact, the matching accuracy between parts is high, and it can withstand high pressure. At the same time, the working chamber of the plunger pump is a sealed space composed of the plunger and the cylinder body, which is not easily invaded by external impurities and has strong anti-pollution ability. In some harsh working environments, such as mining, construction and other fields, the plunger pump can work stably and reliably to ensure the normal operation of the system.
5. Long life
The main parts of the plunger pump, such as the plunger and the cylinder body, are made of high-quality alloy steel. After precision processing and heat treatment, they have high hardness and wear resistance. Moreover, during the operation of the plunger pump, the relative movement between the plunger and the cylinder is sliding friction, with a small friction coefficient and less wear. These factors make the plunger pump have a long service life and can maintain good performance in long-term continuous operation.
