A multi-stage pump based on permanent magnet axial force self-adaptive balance device

Abstract

The invention discloses a multistage pump based on a permanent magnet axial force adaptive balance device. On the basis of the structure of the traditional multistage pump, ring-shaped permanent magnets with the same polarity are respectively embedded on the balance plate and the balance sleeve, and the self-adaptive balance of the axial direction at the moment the multistage pump is started can be realized through the magnetic force of the same pole repelling each other. force effect. The axial force self-adaptive balance device of the present invention can effectively solve the problem that the multi-stage pump has too much axial force at the moment of start-up so that the balance disk is seriously worn and thus affects the normal operation of the multi-stage pump, and at the same time, it can prevent the multi-stage pump from Because the sudden change of the axial force causes the axial movement of the rotor, the safety and stability of the operation of the multistage pump are improved.

Description

technical field [0001] The invention belongs to the field of mechanical pumps, in particular to a multistage pump with a permanent magnet axial force self-adaptive balance device. Background technique [0002] Multistage pumps can be used in many industrial sectors such as petroleum, chemical industry, machinery, mining, light industry, medicine and food. In many processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture resurgence and vacuum degassing, etc., multistage pumps are widely used. [0003] The balance of axial force is an inevitable problem in the operation of multistage pumps. Most multistage pumps use a balance plate to balance the axial force, but the working principle of the balance plate greatly limits the balance effect of the axial force at the moment of starting the multistage pump. Due to the sudden change of force, the balance plate is worn out, which...

AI Technical Summary

Problems solved by technology

Most multistage pumps use a balance plate to balance the axial force, but the working principle of the balance plate greatly limits the balance effect of the axial force at the moment of starting the multistage pump. At the moment of starting the multistage pump, the balance plate will be affected by the axial Due to the sudden change of force, the balance plate is worn out due to the sudden change of force, which leads to the weakening of the balancing effect of the balance plate on the axial force during the operation of the multi-stage pump, and the safety of the rotor system cannot be guaranteed. It is urgent to develop a new axial force balance method to ensure the unit stable operation of

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