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Measuring structure and device of wind rotor speed of wind power generator and wind power generating set

A technology for wind turbines and rotational speed measurement, which is applied to wind turbines, wind turbine monitoring, engines, etc., can solve the problems of increased cost, cannot guarantee the improvement of measurement accuracy, and has no significant effect on measurement accuracy, and achieves the effect of improving measurement accuracy.

Active Publication Date: 2020-09-25
XINJIANG GOLDWIND SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Increase the number of trigger devices for the trigger sensor switch: Since the trigger device is fixed on the low-speed shaft turntable, it is difficult to increase the number of trigger devices when the circumference is small, and this solution will also cause Increased costs;
[0005] (2) Use two sensor switches to calculate the average value: because there are errors in the measurement results of the two sensor switches, this scheme has no significant effect on improving the measurement accuracy;
[0006] (3) Filtering the measured rotational speed value: this scheme can only ensure the stable rotational speed value through filtering processing, but cannot guarantee the improvement of measurement accuracy

Method used

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  • Measuring structure and device of wind rotor speed of wind power generator and wind power generating set
  • Measuring structure and device of wind rotor speed of wind power generator and wind power generating set
  • Measuring structure and device of wind rotor speed of wind power generator and wind power generating set

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Experimental program
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Effect test

Embodiment 1

[0028] figure 2 Schematic diagram of the wind turbine rotor speed measurement structure provided for the embodiment of the present invention Figure 1 , in the embodiment of the present invention, based on the centripetal force principle above, the measuring structure is mainly used to measure the supporting force of the low-speed shaft or the hub at the position of the detection block, and the supporting force points to the rotation axis of the hub or the low-speed shaft. Such as figure 2 As shown, the wind generator includes a hub or a low-speed shaft 1 (in this embodiment, the hub or the low-speed shaft is marked as 1 as a whole, and it can be specifically Figure 7 or Figure 8 The low-speed shaft 330 and the hub 340 in the middle), the wind turbine wind rotor speed measurement structure includes: a bracket 2 arranged on the hub or the low-speed shaft 1, a detection block 3, a first elastic member 4 and a second elastic member 5 with the same structure , and pressure ...

Embodiment 2

[0038] On the basis of the above embodiments, this embodiment further refines the structure for measuring the rotational speed of the wind turbine rotor. image 3 Schematic diagram of the wind turbine rotor speed measurement structure provided for the embodiment of the present invention Figure II ,Such as image 3 As shown, in the above wind rotor speed measurement structure, the end of the second elastic member 5 facing the pressure sensor 6 is provided with a detection baffle 7 for contacting the pressure sensor 6 to detect the elastic force generated by the second elastic member 5 .

[0039] Specifically, since the contact area between the second elastic member 5 and the pressure sensor 6 is small, the measurement accuracy of the pressure sensor 6 is easily reduced, so the detection baffle 7 can be arranged between the second elastic member 5 and the pressure sensor 6, In this way, the area where the second elastic member 5 acts on the pressure of the pressure sensor 6 ca...

Embodiment 3

[0050] Such as Figure 5 As shown, it is a schematic structural diagram of a wind turbine rotor speed measurement device provided by an embodiment of the present invention, including: a detection block rotation angle acquisition module 110 , a controller 130 and the above-mentioned wind turbine rotor speed measurement structure 120 .

[0051] The detection block rotation angle collection module 110 is used to collect the rotation angle of the detection block 3 .

[0052] Specifically, the centripetal force received by the detection block 3 during the rotation process also includes the gravity compensation of the detection block 3 itself, that is, the component force of the gravity on the detection block 3 in the axial direction of the hub or the low-speed shaft 1 . The magnitude of the force component is related to the gravity of the detection block 3 and its rotation angle, so it is necessary to collect the rotation angle of the detection block 3, which can be realized in a v...

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Abstract

The embodiment of the invention provides a wind wheel rotating speed measuring structure and a wind wheel rotating speed measuring device for a wind driven generator and a wind generating set. The wind driven generator comprises a wheel hub or a low speed shaft. The wind wheel rotating speed measuring structure for the wind driven generator comprises a bracket, a detection block and first and second elastic parts same in structure and a pressure sensor, wherein the bracket, the detection block, the first and second elastic parts and the pressure sensor are arranged on the wheel hub or the lowspeed shaft; the upper end of the detection block is connected to the top of the bracket after being connected to the first elastic part and the lower end of the detection block is in contact connection to the pressure sensor fixed to the bottom of the bracket after being connected to the second elastic part. According to the scheme, the rotating speed of the wind wheel is further calculated according to a relationship between centripetal force and the rotating speed by measuring the centripetal force of the detection block, so that the measuring precision is improved and the structure is simple and efficient.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a structure and device for measuring the rotational speed of a wind rotor of a wind power generator and a wind power generating set. Background technique [0002] In large-scale wind turbines, variable-speed and variable-pitch wind turbines are commonly used at present, that is, by adjusting the position of the blades (also called "pitch angle") to control the speed of the wind rotor, and then control the output power of the fan. In wind turbines, the main control system mainly realizes the maximum power tracking of wind energy according to the speed of the wind turbine or the reference wind speed, so as to convert the wind energy into electrical energy to the maximum extent. [0003] In the prior art, the speed measurement method generally adopts the pulse counting method, that is, the number of times the sensor switch is triggered per unit time is detected by detecting devic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00
CPCF03D17/00F05B2270/304
Inventor 马磊
Owner XINJIANG GOLDWIND SCI & TECH CO LTD