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Method and device for adjusting position of gravity center of blade of wind driven generator

A technology of wind turbine and center of gravity position, which is applied in the assembly of wind turbines, wind energy power generation, transportation and packaging, etc., can solve the problem of reducing the use efficiency of single-blade spreaders, poor universality of single-blade spreaders, increasing unit development costs and hoisting. cost and other issues, to achieve the effect of speeding up the development progress, improving the efficiency of use, and improving the versatility

Active Publication Date: 2019-10-18
SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the replacement cost of the single-blade spreader jaws is as high as several million yuan, which greatly increases the development cost and hoisting cost of the unit, makes the single-blade spreader poor in versatility, and reduces the use efficiency of the single-blade spreader

Method used

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  • Method and device for adjusting position of gravity center of blade of wind driven generator
  • Method and device for adjusting position of gravity center of blade of wind driven generator
  • Method and device for adjusting position of gravity center of blade of wind driven generator

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0028] Taking the position of the center of gravity of the blade of the wind turbine to be hoisted closer to the blade root than the position of the center of gravity required by the single-blade spreader as an example, adjust the position of the center of gravity of the blade of the wind turbine to be hoisted, such as figure 2 and image 3 As shown, the adjustment method includes the following steps:

[0029] Step 1, designing and selecting the emphasis point of the blade tip position of the blade 101;

[0030] Step 2, before the shell of the blade 101 is solidified, prefabricate the drainage hole 106 on the blade shell;

[0031] Step 3, preparing a hollow cavity 102 conforming to the inner surface of the blade shell, fixing the hollow cavity 102 on the inner surface of the blade 101 shell before the blade is molded, and sealing the hollow cavity 102 and the junction;

[0032] Step 4, connect the hollow cavity 102 with the pipeline 103, seal the connection, fix the pipelin...

no. 2 example

[0039] Taking the position of the center of gravity of the blade of the wind turbine to be hoisted closer to the blade root than the position of the center of gravity required by the single-blade spreader as an example, adjust the position of the center of gravity of the blade of the wind turbine to be hoisted, such as Figure 4 and Figure 5 As shown, the adjustment method includes the following steps:

[0040] Step 1. Design and select the counterweight of the blade tip position of the blade 201, weigh the blade 201, and calculate the weight required for the counterweight;

[0041] Step 2, preparing an annular rubber ring 202 with an inner cavity similar in appearance to the blade tip matching position;

[0042]Step 3. Put the rubber ring 202 on the balance point of the blade tip, inject water into the inner cavity of the rubber ring 202 through the opening on the rubber ring 202, so that the weight of the water and the weight of the rubber ring can reach the required count...

no. 3 example

[0046] Taking the position of the center of gravity of the blade of the wind turbine to be hoisted closer to the blade tip than the position of the center of gravity required by the single-blade spreader as an example, to adjust the position of the center of gravity of the blade of the wind turbine to be hoisted, the adjustment method includes the following steps:

[0047] Step 1. The weight of the blade root is selected at the baffle of the blade root, weigh the blade, and calculate the weight required for the weight;

[0048] Step 2. Arrange a buckle or fixing point on the blade root side where the blade root baffle and the blade shell are combined.

[0049] Step 3. Fix the rubber flexible container at the buckle or fixed point, inject water into the inner cavity of the rubber container, so that the weight of the water and the weight of the rubber container reach the required counterweight weight,

[0050] Step 4. Use the single-blade spreader to lift the blade into the impe...

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Abstract

According to the method and device for adjusting the position of the gravity center of a blade of a wind driven generator. A counterweight point is determined on the blade of the wind driven generatorto be hoisted, a liquid balancing device is arranged on the counterweight point, a built-in counterweight device arranged in the blade of the wind driven generator or an external counterweight devicearranged outside the blade of the wind driven generator, and the gravity center position of the blade of the wind driven generator to be hoisted is adjusted to the position of the gravity center of the blade required by a single-blade lifting appliance by adjusting the mass of the counterweight liquid in the liquid balancing device. According to the method and device, universality of the single-blade lifting appliance is greatly improved, the using efficiency of the single-blade lifting appliance is improved, the unit development progress is accelerated, and the hoisting and spreading cost ofblade is reduced.

Description

technical field [0001] The invention relates to a method and a device for adjusting the position of the center of gravity of a blade of a wind power generator. Background technique [0002] With the large-scale development of wind turbines, the blades of wind turbines are getting longer and heavier, and the hoisting method of the impeller has gradually changed from the overall hoisting of the impeller and blades to the hoisting of single blades, especially for large offshore wind turbines. The blade spreader has basically become the standard equipment for unit hoisting engineering applications. In the current single-blade hoisting process, the relative position between the clamping point of the spreader jaw and the center of gravity of the blade is very important, and the clamping surface of the jaw needs to follow the aerodynamic shape of the blade. Therefore, for a certain A spreader designed for a blade that determines the aerodynamic shape and the location of the struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C1/10B66C13/08F16F15/28F03D13/10
CPCB66C1/108B66C13/08F03D13/10F16F15/28Y02E10/72
Inventor 王国军高建宏李海涛
Owner SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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