Axial supporting structure of small horizontal axis wind turbine

Abstract

The invention discloses an axial supporting structure of a small horizontal axis wind turbine. The axial supporting structure comprises a base and the small horizontal axis wind turbine arranged at the top of the base; the small horizontal axis wind turbine comprises a horizontal input shaft, a horizontal output shaft and an impeller arranged at the front end of the horizontal input shaft; at least two supporting seats are arranged at the top of the base in the axial direction, at least three horizontal bearing shafts are uniformly distributed between the at least two supporting seats in the circumferential direction, and bearings are arranged at the front end and the rear end of each bearing shaft; the horizontal input shaft is clamped between outer rings of the bearings, and the horizontal input shaft can move backwards in the axial direction when being subjected to axial thrust; and an elastomer is arranged in a hollow cylinder body of the front end of the horizontal output shaft, and the elastomer is compressed only when the horizontal input shaft is subjected to the axial thrust. A connecting mechanism can buffer the axial thrust generated by a wind wheel to a great extent while guaranteeing power transmission between the input shaft and the output shaft, impact on other subsequent power units is avoided, and stability of a system is improved.

Description

technical field [0001] The invention belongs to the technical field of small horizontal axis wind turbines, and in particular relates to an axial support structure of a small horizontal axis wind turbine. Background technique [0002] The main shaft layout and support methods of existing small horizontal axis wind turbines are mostly borrowed from large horizontal axis wind turbines, usually using a three-point support. The front end of the main shaft is connected to the frame through a bearing, and the tail end is rigidly connected to the gearbox. The support is connected with the frame to form a three-point support. However, most of the above support methods start from the perspective of bearing torque load, bending moment, etc., and the buffering and shock absorption measures for additional loads such as axial thrust are insufficient. The wind turbine is usually facing the direction of the incoming flow. The blades of the wind turbine are subjected to the flow around the...

AI Technical Summary

Problems solved by technology

However, most of the above support methods start from the perspective of bearing torque load, bending moment, etc., and the buffering and shock absorption measures for additional loads such as axial thrust are insufficient. The wind turbine is usually facing the direction of the incoming flow. The blades of the wind turbine are subjected to the flow around the incoming wind speed in the atmosphere to generate lift resistance, and the torque is mainly generated by the lift part, which drives the main shaft to rotate, and the resistance part constitutes the axial direction of the main shaft. Thrust, if the necessary buffering and damping measures are not taken, due to the existence of unsteady axial thrust, it will form an unsteady impact on the gearbox or generator connected to the rear end of the main shaft, which will greatly increase the failure rate of the power system

Images