Magnetism forle pump of low cavitation belt variable pitch preposition wheel

Abstract

The invention relates to a magnetism forle pump of a low cavitation belt variable pitch preposition wheel, mainly solving the problems that the net positive suction head (NPSH) of the existing magnetism forle pump is a little higher, the cavitation resistance is poor, and the occasion requirements on conveying vaporizable medium and plural low entrance pressure in fields of petrifaction, refrigeration and the like cannot be satisfied. The invention is characterized in that: the entrance of a pump body (1) is provided with a variable pitch preposition wheel connected to a pump spindle (3), a bearing body (4) and the pump body (1) are respectively provided with a liquid flow inner circulating system and a liquid flow outer circulating system. The magnetism forle pump of the low cavitation belt variable pitch preposition wheel, in virtue of the reasonable cooperation between the reposition wheel and the liquid flow inner circulating system and the liquid flow outer circulating system, reduces the NPSH of the pump, effectively improves cavitation resistance of the pump, features high reliability and long service life, and can satisfy the use in special occasions of requiring low entrance pressure and conveying all the vaporizable mediums in fields of petrifaction, refrigeration and the like.

Description

Technical field: [0001] The patent of the present invention relates to special pumps, especially magnetic pumps with low cavitation and variable pitch front wheels. Background technique: [0002] With the rapid development of my country's petroleum, chemical and other industries, the demand for centrifugal pumps is getting higher and higher. Due to the continuous improvement of the performance requirements of chemical equipment for chemical pumps, and many special applications have put forward high requirements for the cavitation performance of pumps, it is necessary for chemical pumps to avoid cavitation under very low suction pressure. On the other hand, in the process industry, most of the output media are corrosive, flammable, explosive, volatile and toxic. Many technological processes have very strict requirements on the high temperature resistance, corrosion resistance and sealing performance of process pumps. Therefore, for actual production, how to improve the cavi...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing high NPSH and poor anti-cavitation performance of the existing magnetic pumps, which cannot meet the needs of transporting easily vaporized media in the petrochemical and refrigeration fields, the present invention provides a low-cavitation magnetic pump with a front wheel. The magnetic pump with low cavitation and front wheel is equipped with a variable pitch front wheel and a unique structure of liquid flow internal and external circulation systems at the inlet of the impeller, which effectively improves the anti-cavitation performance of the pump and has high reliability and ease of use. Long service life, can meet the needs of special occasions in petrochemical, refrigeration and other fields to transport all easy-to-vaporize media

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