Wind turbine gearbox and sun gear and planet carrier spline pair connection structure thereof

Abstract

The present invention discloses a wind turbine gearbox and a sun gear and planet carrier spline pair connection structure thereof. The connection structure comprises a first stage sun gear, a second stage planet carrier, protruding plates and a rubber gasket; the second stage planet carrier has an internal spline segment; the first stage sun gear has an external spline segment; the external spline segment and the internal spline segment are engaged to form a spline pair; a plurality of bosses are arranged with certain intervals and are all positioned at an upwind direction end of the external spline segment; the bosses are also attached to an upwind direction end surface of the second stage planet carrier; the rubber gasket is disposed between the two half rings and a complete circular ring is formed; a first oil inlet circular groove is formed between the circular ring and a shaft body of the first stage sun gear; a second oil inlet circular groove is formed between the circular ring and the shaft body, the upwind direction end surface of the external spline segment, and the upwind direction end surface of the second stage planet carrier; the bosses of the first stage sun gear are positioned in the second oil inlet circular groove; and the wind turbine gearbox comprises a box body, a first stage planetary gear train and a second stage planetary gear train. Lubricating and cooling effects are good, axial space is effectively shortened, and strength is guaranteed.

Description

technical field [0001] The invention relates to a speed-increasing gearbox for a fan and a connection structure for power transmission between two-stage planetary gear trains in the gear transmission thereof, in particular to a connection structure between a sun gear and a planet frame spline pair. Background technique [0002] Fan gearbox is a precision gear transmission box with high precision and high reliability requirements. It is an important mechanical component in the wind turbine. It is installed on the main frame of the fan nacelle and is used to connect the hub shaft and the generator. Its main function is to transmit the power generated by the wind wheel to the generator under the action of the wind. It is the core device in the fan to obtain the corresponding speed. It must be safe, reliable and durable. The service life is generally required to be 20 years. [0003] There are many kinds of connection structures in machinery, such as pin connection, thread conn...

AI Technical Summary

Problems solved by technology

d. The multiple oil collection chambers (more than 2, preferably 4) used in the upwind direction do not form a complete oil inlet chamber, the oil inlet and storage are insufficient, and the lubrication and cooling effect is not good

e. It needs to be assembled from the downwind direction of the planet carrier, because the space in the downwind direction is small, it is inconvenient to install and disassemble

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