Adjustable blade pitch device eccentric lining structure and assembly method

A technology of eccentric bushing and eccentric distance, which is applied in the control of wind turbines, engines, mechanical equipment, etc., can solve problems such as difficult to meet the standard requirements, and the pitch adjustment frame is stuck, so as to reduce manufacturing difficulty, save manufacturing costs, Simple operation effect

Active Publication Date: 2008-12-31

SHANGHAI ELECTRIC WIND POWER GRP CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an eccentric bushing, which solves the problem that the coaxiality, parallelism and position degree of the guide rod and the guide hole of the pitch...

Abstract

The invention relates to a wind driven generator, in particular to an eccentric bush which can adjust a variation paddle mechanism of a wind driven generator and an assembly method of the eccentric bush. The eccentric bush which can adjust the variation paddle mechanism is installed in a guiding hole of a variation paddle adjusting frame, a guiding rod is installed in the inner hole of the eccentric bush, the diameter of the outer ring of the eccentric bush corresponds to that of the guiding hole of the variation paddle adjusting frame in a matching way, the inner ring of the eccentric bush is provided with a size matched with the guiding rod, and the eccentric distance of the diameter of the inner ring with respect to the diameter of the outer ring of the eccentric bush is 0.1 to 0.2 millimeters. The invention also provides the assembly method of the eccentric bush. Through adopting the technical proposal, the wind driven generator completely solves the problems that the standard requirements of the axiality, the parallelism and the position degree between the assembled guiding rod and the guiding hole of the variation paddle adjusting frame are difficult to meet, and the clamping phenomenon occurs during the movement of the variation paddle adjusting along the guiding rod.

Application Domain

Wind motor controlMachines/engines +1

Technology Topic

Wind drivenBlade pitch +1

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Experimental program(1)

Example Embodiment

[0016] The present invention will be further described in detail below in conjunction with the drawings and embodiments:

[0017] The present invention is to design an eccentric bushing that can adjust the coaxiality, parallelism and position in the guide hole of the pitch adjustment frame. During the assembly process of the pitch adjustment frame, the eccentric bushing is adjusted to compensate for the 3 in the pitch mechanism. The coaxiality, parallelism, and position errors of the guide rod and the guide hole of the pitch adjustment frame can prevent the pitch adjustment frame from jamming when moving along the guide rod.

[0018] reference figure 1 , figure 2 : An eccentric bushing 1 of an adjustable pitch mechanism. The pitch mechanism includes a pitch adjustment frame 2 with a guide hole and a guide rod 3. The eccentric bushing 1 is installed in the guide hole of the pitch adjustment frame 2. The guide rod 3 is installed in the inner hole 14 of the eccentric bushing. The diameter of the outer ring 11 of the eccentric bushing corresponds to the diameter of the guide hole of the pitch adjustment frame 2. The inner ring 12 of the eccentric bushing It has a size matching the guide rod, and the eccentricity of the inner ring diameter relative to the outer ring diameter is 0.1-2.0 mm.

[0019] Preferably, the eccentricity of the axis of the eccentric bushing inner ring and the outer ring of the eccentric bushing of the adjustable pitch mechanism is 1 mm. The eccentric bushing is provided with a number of evenly distributed process mounting holes 13 on the peripheral surface of the front part.

[0020] As attached figure 2 Shown: Schematic diagram of the eccentric liner set.

[0021] An assembling method for adjusting the eccentric bushing of a pitch mechanism includes the following steps:

[0022] Install the eccentric bushing: fit the eccentric bushing into the guide hole of the pitch adjustment frame, and the diameter of the outer ring of the eccentric bushing matches the diameter of the guide hole of the pitch adjustment frame;

[0023] Install the guide rod: Install the guide rod into the inner hole of the eccentric bushing. The inner hole axis of the eccentric bushing is eccentric to the outer ring axis by 0.1-2.0 mm. The inner hole of the eccentric bushing matches the guide rod, and the guide rod is along the inner hole. Make a straight motion

[0024] Adjustment: Use special tools to rotate the assembly process hole of the eccentric bushing to adjust the coaxiality, parallelism and position error of the guide rod and the guide hole of the pitch adjustment frame.

[0025] After adopting this eccentric bushing structure, you can receive the following benefits:

[0026] 1) After the eccentric bushing is adopted, the machining accuracy requirements of the hub, pitch adjustment and guide rod can be appropriately reduced, which reduces the manufacturing difficulty and saves the manufacturing cost;

[0027] 2) During the assembly process, only by rotating the eccentric bushing, the coaxiality, parallelism and position of the guide rod and the guide hole of the pitch adjustment frame can be adjusted in place quickly, and the operation is simple and convenient;

[0028] 3) The eccentric bushing can be replaced. If the eccentric bushing wears out after long-term operation of the pitch mechanism, only the eccentric bushing needs to be replaced, and the pitch adjustment frame does not need to be replaced, which can greatly save operation and maintenance costs.

[0029] The above embodiments are only for the purpose of illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical field can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all are equivalent. The technical solution should also belong to the scope of the present invention and should be defined by the claims.

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Classification and recommendation of technical efficacy words

low manufacturing cost
Reduce manufacturing difficulty

Adjustable blade pitch device eccentric lining structure and assembly method

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

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Description & Claims & Application Information

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