High-efficiency small-flow closed type miniature low-temperature centrifugal pump with inducer

Abstract

The invention relates to a high-efficiency small-flow closed type miniature low-temperature centrifugal pump with an inducer. The high-efficiency small-flow closed type miniature low-temperature centrifugal pump with the inducer is a detachable magnetic drive pump and comprises a front pump shell, the inducer, an impeller, a motor assembly and an isolation sleeve, wherein the front pump shell is a right-angle centrifugal pump shell made of stainless steel, internally provided with a volute structure and comprises a liquid inlet with a VCR connector, a liquid outlet with a VCR connector, and a connecting flange; and the motor assembly comprises a motor front cover, a motor stator, a motor shell, an inner magnetic rotor, a bearing part, a temperature sensor and a heat exchange copper pipe. The high-efficiency small-flow closed type miniature low-temperature centrifugal pump with the inducer provided by the invention has the characteristics of being compact in structure, small in size, small in motor heating value, capable of covering 20 K to 120 K in the working range, and adjustable in rotating speed; the front pump shell and the isolation sleeve are connected through a knife edge flange structure sealed through an oxygen-free copper gasket, so that the centrifugal pump is fully sealed and free of leakage at the low temperature while detachability is achieved; and by adopting a teflon sealing filling technology, the problems of impeller chucking and the like caused by shrinkage of a gap in the pump at low temperature are solved, and the high-efficiency small-flow closed type miniature low-temperature centrifugal pump with the inducer is suitable for small-flow low-temperature fluid pumping occasions.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to a high-efficiency and low-flow closed miniature low-temperature centrifugal pump with an inducer. Background technique [0002] With the development of aerospace technology, long-term storage and efficient utilization of low-temperature propellants in orbit are becoming more and more important. As the core component of the circulating cooling system, the low-temperature centrifugal pump is responsible for providing circulation power for the low-temperature propellant and promoting the stable operation of the circulation. Therefore, the small high-efficiency low-temperature centrifugal pump is directly related to the function realization and performance guarantee of the thermodynamic exhaust system and the low-temperature cooler. [0003] The commercial products of cryogenic pumps currently on the market are mainly medium and large plunger pumps, centrifugal pumps, etc., which are used for f...

AI Technical Summary

Problems solved by technology

The detachable magnetic drive pump of the centrifugal pump has the characteristics of compact structure, small size, small motor heat, the working range can cover 20K ~ 120K and the speed can be adjusted. The front pump is connected by the knife edge flange structure sealed by oxygen-free copper gasket. The shell and the spacer cover are detachable while ensuring the full seal and no leakage of the centrifugal pump at low temperature. The use of PTFE seal filling technology solves the problem of impeller clamping caused by the shrinkage of the pump internal gap at low temperature. It is suitable for small flow Cryogenic fluid pumping occasions

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