Multi-stage radial spilt petrochemical engineering process pump

Abstract

The invention provides a multi-stage radial spilt petrochemical engineering process pump which comprises a pump body, a suction end pump cap, a discharging end pump cap and a pump shaft, wherein the suction end pump cap and the discharge end pump cap are arranged at two ends of the pump body; the pump shaft is arranged in the pump body, and two ends of the pump shaft are both provided with bearing bodies and bearing brackets; a first-stage water suction chamber, a second-stage water suction chamber and a third-stage water suction chamber which are communicated with one another are sequentially arranged an impellor cavity along the extending direction of the pump shaft; the first-stage water suction chamber is internally provided with a first-stage impellor; the second-stage water suction chamber is internally provided with a second-stage impellor; the third-stage water suction chamber is internally provided with a third-stage impellor; the first-stage water suction chamber is communicated with a suction inlet of the pump body; the third-stage water suction chamber is communicated with a discharge opening of the pump body; the second-stage impellor and the third-stage impellor are installed back to back; and the outer diameters of the first-stage impellor, the second-stage impellor and the third-stage impellor are different. According to the invention, because the design that the outer diameters of the three impellors are different is adopted, the structure installation in the pump body is convenient.

Description

technical field [0001] The invention belongs to the field of petrochemical process pumps, in particular to a multi-stage radial split petrochemical process pump. Background technique [0002] With the rapid growth of domestic construction, petroleum, petrochemical and environmental protection markets, China's pump industry has ushered in a strong vitality. It can be said that China's continuously growing market space will surely bring spring to China's pump industry. As far as the petrochemical industry is concerned, the processing capacity of a single set of equipment in my country's oil refineries was generally about 5 million tons per year before 2003. The scale of 10,000 tons / year is mainly for oil refining devices, and even super-large devices of 20 million tons / year. In addition, during the "Twelfth Five-Year Plan" period, my country will successively build a number of large-scale oil refining projects with an annual output of more than 10 million tons, large-scale eth...

AI Technical Summary

Problems solved by technology

For single-stage or two-stage pumps in the form of BB2, in order to increase the lift, the outer diameter of the impeller must be increased. However, increasing the outer diameter of the impeller will reduce the efficiency of the pump, and the radial dimension of the pump body will increase, which will bring problems for casting. difficulty

Therefore, a second-stage pump is added on the basis of the second-stage pump, but the WD-type pumps currently on the market generally have complex structures and are difficult to cast and install.

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