Damping composite type variable rigidity vibration attenuating support for gearbox of wind powered generator

Abstract

The invention belongs to the field of wind power generation, in particular to a damping composite type variable rigidity vibration attenuating support for a gearbox of a wind powered generator. The support mainly comprises an upper yoke (1), a lower yoke (3), four hollow vertical columns (2), an upper elastic body (4), a lower elastic body (4), an upper base (5) and a lower base (5), wherein the upper yoke (1), the lower yoke (3) and the four hollow vertical columns (2) form a combined type main frame of the vibration attenuating support; a viscoelastic damping vibration attenuating layer (11) is compounded on the main frame; after being respectively combined with the upper base (5) and the lower base (5), the upper elastic body (4) and the lower elastic body (4) are respectively fixed on the upper yoke (1) and the lower yoke (3); the vibration attenuating support is connected to the main machine frame (6), and a gearbox torque arm (9) is arranged between the upper elastic body and the lower elastic body. The invention has the characteristics of light dead weight and low cost, the rigidity of the vibration attenuating support can form a non-linear change along with the increase of loads, and the vibration attenuating support has damping attenuation capability and further reduces the transfer of the vibration and the noise of a system to a lower foundation.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and mainly relates to a damping composite variable stiffness vibration-reducing support for a wind-power generator gearbox. The invention can also be used for vibration and noise reduction of other components of a wind-power generator or similar equipment in other industries. Background technique [0002] The gearbox in the wind turbine must bear the torsional load and bending load transmitted through the low-speed shaft. At the same time, the meshing of the internal gears and the unbalanced operation of the mechanism will generate various vibrations and noises during the operation of the gearbox. The vibration and noise reduction object. At present, there are mainly three installation methods of wind turbine gearboxes: integral type, support type, bearing pad type and frame type. Chinese patent CN 101333998A, German patent DE 29924608U1 and European patent EP1046832A1 disclose a b...

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Problems solved by technology

Chinese patent CN 101333998A, German patent DE 29924608U1 and European patent EP1046832A1 disclose a bearing pad type gearbox vibration damping support, the main disadvantage of which is that special tooling or equipment is required for installation and disassembly, and installation is inconvenient

Chinese patent CN101363419A discloses a "back"-shaped frame composed of a "U" frame and a beam, and a frame-type gearbox vibration-damping support with upper and lower vibration-damping elastic elements installed in the frame, which greatly reduces the installation and disassembly of the vibration-damping support. It is difficult to operate, and its disadvantage is that it is difficult to guarantee the ultimate torque of the low-speed shaft due to the large stiffness value, resulting in relatively poor vibration damping effect and low ability to compensate for equipment installation and operation errors, especially not suitable for wind power generation with double bearings supporting low-speed shafts Unit vibration support

Among them, the structural vibration and noise of the gearbox unit can be effectively isolated by the vibration-damping support, and the vibration generated by the excited components of the vibration-damping support itself will be directly transmitted to the unit frame and tower. The above-mentioned vibration-damping supports have not adopted effective related measures

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