A new type of spline structure in wind power main gearbox

Abstract

The invention discloses a new type of spline structure in the wind power main gear box, including a sun gear, the right end of the sun gear is fixedly connected with a fixed plate, and the outer surface of the sun gear is clamped with a secondary planet carrier on the left side of the connecting sleeve. , the outer surface of the right end of the sun gear is an outer spline, and the outer spline of the sun gear is meshed with the inner spline of the spline sleeve. A straight pin runs through the inside of the spline sleeve, and the inside of the straight pin runs There are outer hexagonal bolts, and the inner surface of the cylindrical pin is movably connected with the outer hexagonal bolts. There are bolt holes on the left side of the secondary planetary frame, and the outer hexagonal bolts match the bolt holes in the secondary planetary frame, so that the outer hexagonal bolts It is fixed on the left side of the secondary planet carrier; the sun gear including the outer spline can be carburized and quenched as a whole, and the inner spline of the spline sleeve can be nitrided so that the tooth surfaces of the inner spline and the outer spline are both hardened. Normal meshing operation will not cause increased wear and tear, which improves the life of the gearbox.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a novel spline structure inside a wind power main gear box. Background technique [0002] The gearbox in the wind turbine is an important mechanical component. Its main function is to transmit the power generated by the wind rotor to the generator under the action of the wind and make it obtain a corresponding speed. Usually the speed of the wind rotor is very low, far away If the speed required by the generator for power generation cannot be reached, it must be realized through the speed-up effect of the gear pair of the gearbox, so the gearbox is also called a speed-up box. According to the overall layout requirements of the unit, sometimes the transmission shaft (commonly known as the main shaft) directly connected to the hub of the wind turbine is integrated with the gearbox, or the main shaft and the gearbox are arranged separately, and the expansion sleeve device or coup...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a new type of internal spline structure of the wind power main gearbox, which solves the problem that the heat treatment method of the external spline is carburizing and quenching, and the tooth surface is hardened, while the internal spline is generally designed at low speed. In the shaft or the secondary planet carrier, no other heat treatment can be performed, the tooth surface can only be soft tooth surface, and the hard tooth surface and the soft tooth surface mesh, which will easily lead to serious wear of the soft tooth surface

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