Lubrication structure of rotary spline

Abstract

The invention relates to a lubricating structure of a rotating spline in a gearbox. The lubricating structure comprises a spline shaft, a spline sleeve and a pressing plate, the spline shaft and the spline sleeve are matched through a spline pair, an oil discharging hole is arranged on the pressing plate which is fixed at a free end of the spline shaft and abutted against one end of the spline sleeve, a retaining shoulder is arranged at a spline end, opposite to the free end, of the spline shaft and abutted against the other end of the spline sleeve, a plurality of circumferentially-distributed radial oil collection grooves are arranged between the retaining shoulder and the spline sleeve, an annular inclined-bottom oil cavity is further arranged at the spline end, opposite to the free end, of the spline shaft, one end of the annular inclined-bottom oil cavity is communicated with the circumferentially-distributed radial oil collection grooves while the other end of the same is communicated with a tooth groove of the spline pair, an annular oil collection cavity is arranged at the free end of the spline shaft and jointly formed by surrounding of the spline shaft, the pressing plate and the spline sleeve, and one end of the annular oil collection cavity is communicated with the tooth groove of the spline gear while the other end of the same is communicated with the oil discharging hole of the pressing plate. The lubricating structure is simple in structure, sufficient in spline lubricating and capable of improving reliability and economy of the spline.

Description

technical field [0001] The invention relates to a lubricating structure of a spline pair in a transmission system, in particular to a spline lubricating structure of a wind power gearbox. Background technique [0002] At present, most of the wind power gearboxes at home and abroad use spline connections, and spline connections are also widely used in other transmission fields. Due to the large transmission torque of the spline connection, the use state of the spline meshing surface is basically in the state of boundary lubrication, and even in the state of dry friction, and the failure of the spline is not uncommon. Therefore, the spline lubrication method is directly related to the service life and safety of the spline. [0003] In the field of wind power gearboxes, spline connections are generally designed with specific lubrication methods, or complex radial and axial oil passages are processed on spline shafts and spline sleeves to deliver lubrication obtained by oil spr...

AI Technical Summary

Problems solved by technology

Although this structure can lubricate the spline to a certain extent, it needs to process multiple radial oil holes on the spline shaft, which weakens the strength of the spline shaft and has a complex structure, which is not conducive to product quality control and cost control

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