Online automatic balance executing device of rotor of machine rotating at high speed

Abstract

The invention discloses an online automatic balance executing device of a rotor of a machine rotating at a high speed, which comprises a static disc, a dynamic disc and a dynamic disc mounting shaft sleeve, wherein the static disc is arranged on the end cap of the rotor; the dynamic disc is arranged on the dynamic disc mounting shaft sleeve; the dynamic disc mounting shaft sleeve is arranged on the high-speed rotor through interference fit; and the static disc and the dynamic disc are provided with two concentric annular rotating transformer structures respectively, and the energy transfer between the static disc and the dynamic disc are realized through electromagnetic induction. The inside of the dynamic disc is provided with a rotatable adjusting mechanism consisting of a fixed ring anda rotating ring. The fixed ring generates traveling-wave vibration to drive the rotating ring to rotate through friction. The rotating ring is provided with a counterweight, and when rotating relative to the rotor of the machine rotating at the high speed, the rotating ring adjusts the center of gravity of the rotor of the machine rotating at the high speed to an axle center to reduce the vibration of the vibration of the high-speed rotor. The device of the invention can reduce the vibration caused by an unbalance main shaft during the operation of the machine rotating at the high speed and improve the operation state of the machine rotating at the high speed.

Description

technical field [0001] The invention relates to an online automatic balancing executive device for a high-speed rotary machine rotor. Background technique [0002] With the rapid development of science and technology, modern machinery is developing towards high speed, high efficiency, and high precision. It is more and more important to limit and reduce the vibration of various machinery, that is, to carry out dynamic balance. The key technology of dynamic balance is the design of dynamic balance actuator. At present, the widely used dynamic balance actuators can be divided into the following three categories: [0003] 1. Direct on-line dynamic balance execution device: starting from the quality aspect, the geometric center of the balance disc is directly moved to the rotation center by adding weight and removing weight. There are spraying methods, liquid spraying methods and laser weight removal methods, etc. [0004] 2. Indirect online dynamic balance actuator: provide t...

AI Technical Summary

Problems solved by technology

[0007] Among the first type of direct online dynamic balance actuators, the laser deweighting method and the spraying method are irreversible adjustment methods, and the high-speed adjustment accuracy is low, and the additional equipment (thermal spraying equipment or laser source equipment) is too complicated and expensive to be true. Industrial application promotion

The liquid spraying method has certain applications in industrial occasions, but when the rotor of the rotating machine rotates at high speed, the adjustment accuracy will be greatly reduced due to the vaporization of the liquid and the delay of spraying.

Moreover, liquid leakage during liquid spraying is inevitable and will cause equipment pollution, which is intolerable in most industrial occasions

Therefore, there are practical problems in the balancing methods of these direct online dynamic balancing actuators, and the application range is narrow.

[0008] The second type of indirect online dynamic balance actuator also has serious shortcomings, that is, the rotor is always affected by the balance electromagnetic force during operation, resulting in high energy consumption and large internal stress in the mechanical structure.

Moreover, when the speed is too high, the magnetic field will be distorted, which greatly increases the nonlinearity of the control of the balanced electromagnetic force, making it impossible to achieve accurate control.

[0009] In the third type of hybrid online dynamic balance actuator, the motor type cannot be used for high-speed rotating machinery due to its own structure and installation method.

Although the electromagnetic type can be used for high-speed rotating machinery, it also has two serious shortcomings. One is that the minimum adjustment angle of the electromagnetic adjustment disc axial adjustment is too large (> 5°), resulting in low adjustment accuracy and unable to achieve dynamic balance. fine adjustment

The second is that the electromagnetic adjustment disc cannot be self-locked. In the non-adjustment state, it needs to be locked by the electromagnetic clutch disc. Once the electromagnetic clutch disc fails at high speed, the adjustment disc will be unlocked and a serious safety accident will occur.

[0010] In short, all kinds of on-line dynamic balancing actuators currently available in the market have various deficiencies and are fully suitable for the working environment of online dynamic balancing of rotors in high-speed rotating machinery.

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