Now pump, as a kind of general machinery, has been widely used in various fields of
national economy. For example, the irrigation and drainage of agriculture and the water supply and drainage of cities all need pumps. In the various departments of T industry, the pump is indispensable equipment. Such as in the power industry needs boiler feed pump, forced circulation pump, circulation pump, condensate pump, ash and slag pump, pump, fuel pump, etc.; In the mining industry need mine drainage pump, water and sand filling pump, water pump, coal pump, etc.; In the petroleum industry need slurry pump, water injection pump, deep well production oil pump, oil transport oil pump, petroleum refining millet, etc.; In the chemical industry, corrosion resistant pumps, proportional pumps, metering pumps, etc.; In the transportation industry, fuel pumps, fuel injection pumps, lubricating pumps, hydraulic pumps, etc. In chemical production, a large number of raw materials and semi-finished products are liquid. According to the variety, the liquid is more diverse, such as water, petroleum products, organic solutions and a variety of acid, alkali, salt solutions. In order to ensure the normal continuous process of chemical production, it is necessary to use pumps to transport these liquid materials from one place to another along the pipeline or from low pressure to high pressure. The normal operation of the pump is the key to ensure the normal operation of the chemical production. If the pump fails, it will affect the production and even make the production stop. If the pipe is the blood vessel of the human body, then the pump is the heart of the human body. So the pump is an important universal machine, plays an important role in production.