Rotor online automatic balancing device of high-speed rotating machine

Abstract

The invention discloses a rotor online automatic balancing device of a high-speed rotating machine, which comprises a fixed disk, a movable disk and a movable disk end cover, wherein the fixed disk isinstalled on a rotor end cover, the movable disk end cover is installed on the movable disk, and the movable disk is installed on a high-speed rotor by interference fit; and two concentric annular rotating transformer structures are respectively designed on the fixed disk and the movable disk and realize the energy transfer between the fixed disk and the movable disk by electromagnetic induction.A rotatable adjusting mechanism is designed in the movable disk and comprises a fixed ring and a rotating ring, wherein the fixed ring generates traveling wave vibration and drives the rotating ringto rotate by friction force. A counterweight is arranged on the rotating ring; and when the counterweight generates rotation relative to the rotor of the high-speed rotating machine, the rotor gravitycenter of the high-speed rotating machine is adjusted on an axle center so as to achieve the aim for reducing the vibration of the high-speed rotor. By adopting the device, the vibration caused by anunbalanced main axle can be reduced when the high-speed rotating machine is operated and the running state of the high-speed rotating machine is improved.

Description

technical field [0001] The invention relates to an online automatic balancing 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 the disk wi...

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.

Images