Assistance-free pitch-changing horizontal shaft wind driven generator

Abstract

The invention relates to an assistance-free pitch-changing horizontal shaft wind driven generator, which comprises a generator set, a hub, a paddle blade and a paddle blade handle, wherein the hub is provided with more than two bearing blocks; the paddle blade handle is arranged on the bearing blocks through a bearing; the paddle blade is connected with one end part of the paddle blade handle; the hub can move axially on a spline shaft; the spline shaft is provided with a rack block, and the rack block is provided with a rack; one end of the paddle blade handle opposite to the mounted paddle blade is provided with a gear; the gear is meshed with the rack; and a spring is arranged between one lateral surface of the rack block and a cross section of the hub. In the structure, when the actual wind speed is larger than the set wind speed of the wind driven generator, the force acting on the paddle blade and the hub drives the paddle blade and the hub to overcome the elastic force of the spring and move along the axial direction of a spline, the paddle blade handle and the paddle blade are driven to rotate under the action of the rack and the gear, and the pitch angle of the paddle blade is changed, so the wind resistance of the wind driven generator is improved, the pitch-changing accuracy is high, and the structure is simple.

Description

technical field [0001] The invention relates to a variable-pitch wind power generator, in particular to an unassisted pitch-variable structure on a horizontal-axis wind power generator. Background technique [0002] Using natural wind to generate wind power is the full use of renewable energy by human beings. It has the characteristics of convenient and flexible installation, no pollution, and environmental protection, and has attracted more and more attention. However, in the field of wind power generators, especially in small and medium-sized wind power generators, the problem of generator damage due to excessive wind speed has always been a difficult technical problem to solve. In the patent document with the authorized announcement number CN201265487Y and the application date being 2008.5.29, a flying rod synchronous pitch mechanism is disclosed, including a starting spring, a synchronous pull rod, a speed regulating spring, a synchronous guide, a wind hub, a blade flang...

AI Technical Summary

Problems solved by technology

However, in the field of wind power generators, especially in small and medium-sized wind power generators, the problem of generator damage due to excessive wind speed has always been a difficult technical problem to solve.

This structure is that the wind plate overcomes the elastic force of the compression spring under the action of the wind force to make the push rod rotate the blade through the crank arm. The thrust in the same direction as the thrust of the wind plate, when the wind speed exceeds the maximum wind speed that the wind turbine can withstand, the force acting on the push rod through the wind plate is opposite to the thrust generated by the wind on the blade and hub, so that both There is a phenomenon of offsetting in some directions, so that the actual rotation angle of the blade itself is smaller than the theoretical rotation angle, so that it is impossible to correspond the wind speed with the theoretical rotation angle of the blade, and it cannot accurately reflect the impact of wind speed on the wind force. The influence of generator power, that is, when the wind speed reaches the wind speed that can be set by the wind turbine, the blades will not rotate due to the force offset, but the power of the wind turbine has reached the maximum withstand power, so that It is easy to damage the unit; in addition, part of the pitch control device of this structure is set on the hub, and the other part is set in the casing, wherein the push rod must pass through the generator set, so the structure is complex and difficult to manufacture and install

Images