Gear box vibration damper and vibration damping protection method

Abstract

The invention discloses a shock absorber for a gearbox and a shock absorbing protecting method. The shock absorber comprises a cross beam, supporting pipes, elastic bodies and a bottom plate; each elastic body comprises elastic layers and separating plates; the separating plates are distributed on outer sides of the elastic layers; and spacing structures are formed in the middles of the elastic layers and are through holes penetrating through the elastic layers or blind holes which do not penetrate through the elastic layers. The spacing structures are formed in the middles of the elastic layers, when loads borne by the elastic bodies are increased continuously, the spacing structures in the elastic layers can be closed gradually, and the rigidity of the elastic bodies can be increased nonlinearly. The rigidity of the elastic bodies of the shock absorber can be increased gradually, and the elastic bodies can realize effects of absorbing shock and preventing damage and can provide the sufficient supporting force for the large loads.

Description

technical field [0001] The invention relates to a vibration reduction protection of a gear box damper, in particular to a method for preventing the gear box damper from being damaged by changing the variable stiffness of the gear box damper. Background technique [0002] In engineering fields such as wind power or other locomotives, when the equipment is in normal operation, it is hoped that the gear box damper has a relatively stable stiffness to achieve a better vibration damping effect, but when there is a heavy load condition, it is hoped that the gear box damper With high stiffness, the vibration amplitude of the equipment can be controlled within a safe range. When the limit load is rapidly and greatly increased, the stiffness of the gearbox shock absorber needs to be increased slowly to meet the good vibration reduction effect. , to avoid the gearbox shock absorber from being quickly damaged. [0003] The structural types of wind turbines mainly include doubly-fed, s...

AI Technical Summary

Problems solved by technology

When the equipment load fluctuates abnormally rapidly and greatly, rapid damage often occurs, resulting in high maintenance and replacement costs

[0007] 2. It is very difficult to replace the gear box shock absorber in the prior art

The gear box shock absorber of the existing structure is mainly composed of a beam, a support tube, a bottom plate, an upper elastic body, a lower elastic body, etc. If it is necessary to successfully replace the gear box elastic body, first of all, it is necessary to lift the The beam, and the beam generally weighs several hundred kilograms. There is generally no crane on the fan, and it is difficult to lift it by manpower. To replace the lower elastic body under the torque arm of the gearbox, you need to use a jack to lift the gearbox. It is located in a remote place and operates at high altitude, and the operating space in the engine room is extremely limited. At present, most wind turbine gearboxes do not have a platform for placing a jack under the torque arm, so it is very difficult to replace it.

[0008] 3. The center height of the gearbox shock absorber in the prior art does not have an adjustable function

Due to the machining error and assembly error in the gearbox and frame of the wind power generating set, the distance between the torsion arm at both ends of the gearbox and the frame deviates from the theoretical size, resulting in the upper and lower The uneven compression of the lower elastic body not only affects the life of the elastic body itself, but also produces a downward or upward additional force on the torque arm of the gearbox due to the uneven compression of the upper and lower elastic bodies, and this force will act on the rotating shaft of the fan , running for a long time will cause the spindle to overheat and affect the life of the whole machine

Images