Asynchronous transmission multistage centrifugal pump
A centrifugal pump and multi-stage pump technology, which is applied in the field of centrifugal pumps, can solve the problems of reducing the speed of multi-stage pumps, decreasing efficiency, and the limited range of reduction, so as to reduce NPSH, improve sealing effects, and reduce leakage points. Effect
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[0022] The present invention includes a first-stage pump body 2, the first-stage pump body 2 is provided with a double-suction impeller 4 through a first-stage shaft 5, and is characterized in that: the water outlet end of the first-stage pump body 2 is connected to the multi-stage pump body 12 through a water pipe 25 The water inlet is connected; the multistage pump body 12 is provided with a multistage impeller 11 through a multistage shaft 10; the multistage shaft 10 is connected with the first stage shaft 5 through a gearbox 7.
[0023] As a preferred solution of the present invention, the first stage shaft 5 is connected to the end of the gearbox 7 with a low speed; the multistage shaft 10 is connected to the end of the gearbox 7 with a high speed.
[0024] As another preferred solution of the present invention, one end of the first stage shaft 5 and both ends of the multistage shaft 10 are provided with a magnetic coupling 6; the first stage shaft 5 and the multistage sha...
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