Permanent magnet synchronous direct-driven motor bearing structure of the stirring industry

Abstract

The invention discloses a special permanent magnet synchronous direct-driven motor bearing structure of the stirring industry. The permanent magnet synchronous direct-driven motor bearing structure ofthe stirring industry includes a shaft extension terminal bearing and a tail bearing, wherein the shaft extension terminal bearing includes a set of cylindrical roller bearings and two sets of cylindrical roller thrust bearings; an adjusting spring is arranged between the two sets of cylindrical roller thrust bearings; the tail bearing includes a set of self aligning bearings and an outer ring anti-rotation part; and the shaft extension terminal bearing and the tail bearing take actions together so as to bear the weight of a motor rotor, the weight of a stirring paddle, the unilateral magnetic pull, the axial imbalance magnetic pull, the reaction axial force of stirring liquid to the stirring paddle, and the radial force of stirring liquid to the stirring paddle, so as to guarantee that the motor can operate stably and reliably.

Description

technical field [0001] The invention relates to a permanent magnet synchronous direct drive motor bearing, in particular to a permanent magnet synchronous direct drive motor bearing structure used in the stirring industry. Background technique [0002] At present, domestic chemical mixing enterprises mainly use the structure of ordinary motor + reducer, and the bearing of the reducer adopts a pair of tapered roller bearings. It has a series of problems such as low overall efficiency, high energy consumption, and high maintenance cost. Especially during the stirring process, the stirring impeller is subjected to a large bending moment and combined torque, which makes the bearing of the reducer quickly lose its rotation accuracy, which in turn causes bearing wear. , gear wear is accelerated, and the life of the reducer is shortened; therefore, the user's use and maintenance costs are increased, and production efficiency is reduced. [0003] In recent years, in the chemical mi...

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Problems solved by technology

It has a series of problems such as low overall efficiency, high energy consumption, and high maintenance cost. Especially during the stirring process, the stirring impeller is subjected to a large bending moment and combined torque, which makes the bearing of the reducer quickly lose its rotation accuracy, which in turn causes bearing wear. , the gear wears faster, and the life of the reducer is shortened; therefore, the user's use and maintenance costs are increased, and the production efficiency is reduced.

[0003] In recent years, in the chemical mixing industry, the drive structure using permanent magnet synchronous direct drive motor + frequency converter has become more and more widespread. It has the advantages of high overall efficiency, low maintenance, and large overload start-up capability. , the bearing stress condition is bad. If no special design is made, the motor bearing will be damaged soon, which will cause damage to the motor and cause property loss of the user.

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