CN201420658Y - Yaw transmission mechanism of wind turbine - Google Patents

Abstract

The utility model relates to a yaw transmission mechanism of a wind power generator, which is located at the top of a vertical pole of the generator, and comprises a support shaft fixed on the vertical pole and a transmission case set on the support shaft. Machine mounting frame, the transmission mode is worm drive, the worm is installed on the transmission case and located inside it, one end of the worm protrudes from the transmission case to connect with the yaw drive system, the turbine is set inside the transmission case and fixed on the support shaft . Driven by the yaw drive system, the utility model drives the worm to rotate around the turbine, thereby realizing the change of the angle of the generator and the wind wheel, so that the yaw drive system does less work and saves energy. At the same time, when the wind wheel completes the angle adjustment After aligning with the wind direction, the yaw drive system stops working. At this time, the turbine and worm are in a relatively static state. Due to the structure of the worm, no matter how strong the wind is, the turbine will not rotate, and it is not easy to be damaged and has good stability.

Description

Yaw transmission mechanism of wind turbine

technical field

The utility model relates to a mechanical transmission system of a wind power generator, in particular to a yaw transmission mechanism for making the wind wheel of the wind power generator face the best wind direction.

Background technique

Today's wind turbines generally use an electric yaw system to adjust the wind rotor and align it with the wind direction. The yaw system generally includes a sensor for sensing wind direction and force, a yaw motor, a yaw planetary gear reducer, a yaw gear, a large gear for a gyratory body, etc. When working, the sensor is used as an inductive element to transmit the electrical signal of the change of wind direction to the processor of the control circuit of the yaw motor. After comparison, the processor sends a clockwise or counterclockwise yaw command to the yaw motor. The gyro torque and the motor speed will be decelerated by the coaxially connected reducer, and the yaw moment will act on the large gear of the rotary body through the yaw planetary gear, driving the wind wheel to yaw against the wind. When the wind is completed, The motor stops working, and the yaw process ends. However, since the small yaw planetary gear drives the large rotary gear to rotate during the working process, not only the yaw motor needs to do more work, but more importantly, when the wind wheel completes the angle adjustment and aligns with the wind direction, the planetary Only when the gear and the large gear of the rotary body are in a relatively static state can the wind wheel be aligned with the wind direction. At this time, if the wind force is strong or there is a sudden gust of wind in other directions, it is easy to cause the large rotary gear to rotate and cause damage to the yaw transmission mechanism. , the stability is not good, if you want to increase its stability, you need to add a stabilizing device in addition, which not only increases the cost, but the effect is still unsatisfactory.

Utility model content

The purpose of the utility model is to provide a new type of yaw transmission mechanism for the shortcomings of existing wind generators using planetary gears as adjustment components of the yaw system.

The technical scheme of the utility model is: a yaw transmission mechanism of a wind power generator, which is installed on the top of the vertical pole of the generator, including a support shaft fixed on the pole and a transmission case set on the support shaft, the transmission case The generator mounting frame is fixed on the top, and the transmission mode is worm drive. The worm is installed on the transmission case and is located inside it. One end of the worm protrudes from the transmission case to connect with the yaw drive system. The turbine is set in the transmission case. The interior is set and fixed on the support shaft.

Preferably, the transmission case is sleeved on the support shaft through the upper and lower bearings, and the top and bottom surfaces of the transmission case are fixed on the bearing seats of the upper and lower bearings through bolts.

Preferably, the yaw driving system includes a DC motor and a reducer, and the reducer is connected to the worm.

Preferably, a flat key is provided on the supporting shaft in contact with the turbine, and a corresponding keyway is provided on the turbine to fix the turbine.

The beneficial effects of the utility model are as follows: the utility model adopts the worm drive mode, and the turbine is fixed on the support shaft. Driven by the yaw drive system, the worm starts to rotate. When the worm rotates, it rotates around the turbine and drives the transmission. The chassis rotates around the support shaft, and the generator mounting bracket is fixed on the transmission chassis, thereby realizing the change of the angle of the generator and the wind wheel, so that the yaw drive system does less work and saves energy. At the same time, when the wind wheel completes the angle adjustment After the wind direction is adjusted, the yaw drive system stops working. At this time, the turbine and worm are in a relatively static state. Due to the structure of the worm, no matter how strong the wind is, the turbine will not rotate, and it is not easy to be damaged and has good stability.

Description of drawings

Fig. 1 is the schematic diagram of the structure of the utility model wind power generator

Figure 2 is a sectional view of the utility model

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing:

A yaw transmission mechanism of a wind power generator is installed on the top of a generator pole 1 through a mounting flange 10, including a support shaft 2 fixed on the pole 1 and a transmission case 3 set on the support shaft 2, The transmission case 3 is set on the support shaft 2 through the upper and lower bearings 7, the top and bottom surfaces of the transmission case 3 are fixed on the bearing seats of the upper and lower bearings 7 through bolts, and the transmission case 3 is fixed with the generator installation frame 4. The generator 9 is fixed on the generator mounting frame 4. The transmission mode is worm drive. The worm 5 is installed on the transmission case 3 and located inside it. One end of the worm 5 protrudes from the transmission case 3 and the yaw drive The systems are connected, and the turbine 6 is arranged inside the transmission case 3, and is set and fixed on the support shaft 2. A flat key 8 is provided on the support shaft 2 in contact with the turbine 6 , and a corresponding keyway is provided on the turbine 6 for fixing the turbine 6 . The yaw drive system includes a DC motor and a reducer, and the reducer is connected to the worm 5 .

When working, the best wind direction is detected by the wind direction and wind force sensor arranged on the generator 9, and the signal is transmitted to the processor of the control loop of the yaw drive system. After the processor analyzes and processes, the control signal is output to the yaw drive system. Aeronautical drive system controls the rotation and stop of the DC motor, thereby controlling the rotation and stop of the worm 5. Since the turbine 6 is fixed on the support shaft 2, the rotation of the worm 5 will cause the worm 5 to rotate around the turbine 6. Since the worm 5 is installed on the transmission On the case 3, the transmission case 3 is installed on the support shaft 2 through the upper and lower bearings 7, so the transmission case 3 rotates with the worm 5 around the support shaft 2, so that the generator 9 and the wind wheel rotate around the support shaft 2 until the wind wheel faces the best wind direction .

Claims (4)

1, a kind of driftage driving mechanism of wind-driven generator, be installed on the top of generator vertical rod, comprise and be installed in the back shaft in the vertical rod and be set in transmission cabinet on the back shaft, be fixed with the generator scaffold on the transmission cabinet, it is characterized in that: the kind of drive is worm drive, worm screw is installed on the transmission cabinet and is positioned at its inside, and the end of worm screw stretches out the transmission cabinet and yaw drive system is joined, and turbine is arranged at the inside suit of transmission cabinet and is fixed on the back shaft.

2, the driftage driving mechanism of wind-driven generator as claimed in claim 1 is characterized in that: described transmission cabinet is loaded on the supporting axle by upper and lower bearing housing, and the end face of transmission cabinet and underrun bolt are installed on the bearing support of upper and lower bearing.

3, the driftage driving mechanism of wind-driven generator as claimed in claim 1, it is characterized in that: described yaw drive system comprises direct current generator, speed reducer, speed reducer and worm screw are joined.

4, the driftage driving mechanism of wind-driven generator as claimed in claim 1 is characterized in that: be provided with flat key with the turbine contact position on the described back shaft, turbine is provided with corresponding keyway, in order to fixed turbine.

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