High-speed main shaft electromagnetic type field dynamic balancing device and method

Abstract

The invention discloses a high-speed main shaft electromagnetic type field dynamic balancing device and method. According to the high-speed main shaft electromagnetic type field dynamic balancing device and method, both on-line dynamic balance and off-line dynamic balance can be achieved. The balancing device comprises four identical U-shaped annular iron cores and a sleeve, wherein the sleeve is composed of four corresponding bosses and is fixed on a main shaft, the wrap angle of each boss is 90 degrees, magnet exciting coils and force measuring coils are wound around the iron cores, electromagnetic force can be generated between each iron core and a corresponding boss, the electromagnetic force can be changed along with the change of an exciting current, the direction of the electromagnetic force is the same as the direction of a corresponding boss all the time, and the value and the direction of the current led into the magnet exciting coils can be changed to obtain any kind of force (within a set value) which can be in any direction and can rotate along with the main shaft to counteract unbalanced force caused by unbalanced quantity. The high-speed main shaft electromagnetic type field dynamic balancing device is simple, coils can be wound easily, machining is convenient, the on-line dynamic balance and the off-line dynamic balance can be combined, the defects that a traditional electromagnetic type balancing head is complex in structure and limited in balancing capacity are overcome, and high-rotation-speed, high-accuracy and high-efficiency field dynamic balancing can be achieved.

Description

【Technical field】 [0001] The invention relates to a high-speed spindle dynamic balancing method, in particular to an electromagnetic on-site dynamic balancing device and method for a high-speed spindle. 【Background technique】 [0002] Due to the uneven material of the rotor, manufacturing and assembly errors, thermal deformation, and deformation of the rotor during operation, the unbalanced force generated by the main inertial axis of the actual rotor deviating from its rotation axis is one of the most important reasons for the vibration of rotating machinery . Under the action of unbalanced force, the rotor produces deflection deformation and internal stress, which is transmitted to the machine base through the bearing, which causes the machine to vibrate, thereby reducing the machine performance, working efficiency and service life. Therefore, in order to eliminate the unbalanced force of the rotor and suppress the vibration, the rotor dynamic balancing technology has att...

AI Technical Summary

Problems solved by technology

However, it is very difficult to wind the mouse dragon coil, which is not conducive to the reduction of the size of the entire balance head, and it cannot overcome the shortcoming of the limited balancing ability of the electromagnetic balance head.

[0007] The existing dynamic balancing methods have relatively mature technologies, but each balancing technology has some defects or deficiencies, and it is difficult to perform high-speed, high-precision, high-efficiency dynamic balancing on the spindle

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