Vertical axis wind turbine with blade angle varying along with wind direction and wind velocity

Abstract

The invention relates to a vertical axis wind turbine with a blade angle varying along with wind direction and wind velocity, which comprises a control system, a planetary gearbox, a fixed axis gearbox, a transmission shaft, a main support, an upper cantilever beam, a lower cantilever beam, a bearing pedestal, a bearing, blades, a vertical axis, a tower and the like, wherein the vertical axis is connected with the tower through the bearing and the bearing pedestal; the main support is sleeved outside the vertical axis and the bearing pedestal, so that the middle part of the main support is connected with the middle part of the vertical axis, and the top end of the main support and the head of the vertical axis are connected with the bottom of the planetary gearbox; the control system is connected with the top of the planetary gearbox through the bearing pedestal; the root part and the end part of the upper cantilever beam are respectively connected with the side face of the planetary gearbox and the side face of the fixed axis gearbox, and the root part and the end part of the lower cantilever beam are respectively connected with the lower end of the main support and the bearing pedestal; both ends of the transmission shaft are respectively connected with the planetary gearbox and the fixed axis gearbox; and the blades are respectively connected with the fixed axis gearbox and the bearing pedestal so that output power maintains near the rated power value.

Description

technical field [0001] The invention relates to a wind power machine of a wind power generating set, in particular to a vertical axis wind power machine whose blade installation angle changes with wind direction and wind speed. Background technique [0002] Both the vertical axis wind turbine and the horizontal axis wind turbine are power machines that convert wind energy into mechanical work. But its technology is immature, and the efficiency of using wind energy is lower than that of horizontal axis wind turbines. [0003] The existing technology of vertical axis wind turbines can accept the wind from any direction without using the steering device, but because the blades of most wind turbines are fixedly connected with the wind wheel, they cannot perform relative movement, and the blades The installation angle cannot change with the wind direction and wind speed, so the wind from any direction is not accepted much. The angle changes with the change of the blade installa...

AI Technical Summary

Problems solved by technology

When the wind speed exceeds the rated wind speed, the rotation speed of the wind rotor cannot be adjusted, and the brake cannot be stopped when the wind speed exceeds the working wind speed range, which will cause the wind turbine to greatly exceed the rated power value, and cause the generator of the wind turbine generator to exceed the rated power and burn out.

In addition, the blade rotation device uses an elastic "synchronous belt" to transmit motion and force. After using a larger wind turbine, the instantaneous transmission ratio cannot be kept constant, the reliability is not high, and the power generation cost of the wind turbine is high.

[0006] There are unreasonable things in the structure of the existing vertical axis wind turbine, especially: the non-cooperating transition shaft section "shaft body" between the shaft shoulder and the journal of the fixed wind rotor is located at the bottom of the wind rotor, and the Under the action, the shaft body of the vertical shaft will be subjected to a large bending stress

The vertical axis is an indispensable part of the vertical axis wind turbine. From the perspective of power generation cost, it is impossible to solve this technical problem by infinitely increasing the diameter of the vertical axis. As a result, the current low-power vertical axis wind turbine occupies This is one of the main reasons why vertical axis wind turbines cannot develop into high-power models

Larger curved blade Darrieux wind turbines are representative in solving the technical problem of bending stress on the wind rotor shaft body. A cable is installed between the shaft head of the vertical shaft of the wind rotor and the ground through the connecting parts. This technical problem is solved approach increases generation cost and floor space

In addition, this kind of wind turbine cannot start by itself, and needs to be started with the help of an external booster. The installation angle of the blades cannot change with the wind direction, let alone change with the wind speed.

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