Adjustable blade pitch device eccentric lining structure and assembly method

Abstract

The invention relates to a wind driven generator, in particular to an eccentric bush which can adjust a variation paddle mechanism of a wind driven generator and an assembly method of the eccentric bush. The eccentric bush which can adjust the variation paddle mechanism is installed in a guiding hole of a variation paddle adjusting frame, a guiding rod is installed in the inner hole of the eccentric bush, the diameter of the outer ring of the eccentric bush corresponds to that of the guiding hole of the variation paddle adjusting frame in a matching way, the inner ring of the eccentric bush is provided with a size matched with the guiding rod, and the eccentric distance of the diameter of the inner ring with respect to the diameter of the outer ring of the eccentric bush is 0.1 to 0.2 millimeters. The invention also provides the assembly method of the eccentric bush. Through adopting the technical proposal, the wind driven generator completely solves the problems that the standard requirements of the axiality, the parallelism and the position degree between the assembled guiding rod and the guiding hole of the variation paddle adjusting frame are difficult to meet, and the clamping phenomenon occurs during the movement of the variation paddle adjusting along the guiding rod.

Description

technical field [0001] The invention relates to a wind power generator, in particular to an eccentric bush and an assembly method of an adjustable pitch mechanism of the wind power generator. Background technique [0002] At present, the wind turbines with the largest market share are mainly divided into two categories, one is the fixed-pitch stall regulation type, and the other is the variable-pitch regulation type. The above two types of wind turbines use asynchronous generators, and the speed is basically fixed. Pitch refers to the blades mounted on the hub. The size of its pitch angle can be changed by means of control technology. Its adjustment method is divided into three stages: the first stage is the start-up stage, when the wind turbine reaches the operating condition, the computer commands to adjust the pitch angle. Until the wind turbine reaches the rated speed and is connected to the grid for power generation; in the second stage, when the output power is less ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an eccentric bushing, which solves the problem that the coaxiality, parallelism and position degree of the guide rod and the guide hole of the pitch adjustment frame are difficult to meet the standard requirements after assembly, and it is easy to cause the pitch adjustment frame to move along the guide rod. The problem of stuck phenomenon occurs when

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