CN211759737U - Tower correcting device for dislocation of flange holes of wind power blades - Google Patents
Tower correcting device for dislocation of flange holes of wind power blades Download PDFInfo
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- CN211759737U CN211759737U CN201922032136.1U CN201922032136U CN211759737U CN 211759737 U CN211759737 U CN 211759737U CN 201922032136 U CN201922032136 U CN 201922032136U CN 211759737 U CN211759737 U CN 211759737U
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- positioning pin
- flange hole
- dislocation
- tower
- correcting
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Abstract
A tower correcting device for dislocation of a wind power blade flange hole comprises a positioning pin, a correcting screw rod and a recovery screw rod, wherein one end face of the positioning pin is provided with a coarse-tooth internal thread; the other end of the positioning pin is a cone with a larger slope, is in smooth transition with the large-diameter part, can be contacted with the dislocation part of the blade flange hole, and can apply acting force vertical to the axis of the flange hole to the blade flange; the middle part of the positioning pin is cylindrical and is in clearance fit with the flange hole with higher precision; one end of the correcting screw is a thickened hexagonal head, and the maximum diameter of the thickened hexagonal head is larger than the diameter of a flange hole of the variable-pitch bearing; the other end of the correcting screw is provided with a coarse thread and an external thread which are screwed with the internal thread of the clamping part of the positioning pin; one end of the recovery screw rod is provided with a coarse thread and an external thread which can be screwed with the internal thread of the clamping part of the positioning pin. The utility model provides a simple structure, work efficiency are high, need not special power loading equipment and tower on the tower correcting unit on the tower of wind-powered electricity generation blade flange hole dislocation of maneuverability.
Description
Technical Field
The utility model belongs to the wind-powered electricity generation field relates to a correcting unit on tower of wind-powered electricity generation blade flange hole dislocation.
Background
With the rapid development of the low-wind-speed wind power market, the length of the blades of the wind turbine generator is longer and longer, the weight of the blades is heavier, and the safety and the reliability of the blades are more and more concerned by the wind power industry. Because the blade and the variable-pitch bearing are spliced in the field, the working condition is limited, the working environment is severe, the precision in a flange hole cannot be effectively guaranteed, and the risk of relative dislocation between the blade flange and the variable-pitch bearing is caused. The dislocation of the flanges can cause the mechanical interference of the blade bolts, stress concentration is formed, and the fracture phenomenon is likely to occur. After the bolts are broken, broken bolts cannot be taken out smoothly due to dislocation of the flanges, and safe operation of a unit is seriously influenced. Therefore, before the bolts are replaced after the bolts are broken, the dislocation between the connecting holes on the tower needs to be eliminated, and the requirement on the centering precision of the flange is ensured. The current methods for eliminating dislocation are two types: 1. the method has the advantages that the labor intensity is high, the working efficiency is low, the positioning pin is difficult to take back, and the safety risk exists. 2. The correction rod and the sleeve are matched and corrected (CN208236572U), when the dislocation amount is large, the correction rod cannot pass through the dislocation part to reach a fixed position, special power loading equipment is needed, the structure is complex, and the operability on the tower is poor.
Disclosure of Invention
In order to solve the above-mentioned shortcoming such as maneuverability is poor on eliminating dislocation in-process work efficiency low, locating pin back take back difficulty and the tower, the utility model provides a simple structure, work efficiency are high, need not special power loading equipment and tower on the tower correcting unit of wind-powered electricity generation blade flange hole dislocation of maneuverability.
The utility model provides a technical scheme that its technical problem adopted is:
a tower correcting device for dislocation of a wind power blade flange hole comprises a positioning pin, a correcting screw rod and a recovery screw rod, wherein one end face of the positioning pin is provided with a coarse-tooth internal thread; the other end of the positioning pin is a cone with a larger slope, is in smooth transition with the large-diameter part, can be contacted with the dislocation part of the blade flange hole, and can apply acting force vertical to the axis of the flange hole to the blade flange; the middle part of the positioning pin is cylindrical and is in clearance fit with the flange hole with higher precision;
one end of the correcting screw is a thickened hexagonal head, and the maximum diameter of the thickened hexagonal head is larger than the diameter of a flange hole of the variable-pitch bearing; the other end of the correcting screw is provided with a coarse thread and an external thread which are screwed with the internal thread of the clamping part of the positioning pin;
one end of the recovery screw rod is provided with a coarse thread and an external thread which can be screwed with the internal thread of the clamping part of the positioning pin.
Furthermore, one end of the correction screw rod is connected with the hub through a gasket, and the other end of the recovery screw rod is connected with the hub through a gasket.
The beneficial effects of the utility model are that: simple structure, high working efficiency, no need of special power loading equipment and strong operability on the tower.
Drawings
Fig. 1 is a schematic view of a correcting state structure of a correcting device on a blade flange hole dislocation tower provided by the present invention;
fig. 2 is the utility model provides a pair of correcting unit's recovery state structure sketch map on blade flange hole dislocation tower.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, the tower upper correcting device for the dislocation of the flange holes of the wind power blades comprises a positioning pin, a correcting screw rod and a recovery screw rod, wherein one end face of the positioning pin is provided with a coarse-tooth internal thread; the other end of the positioning pin is a cone with a larger slope, is in smooth transition with the large-diameter part, can be contacted with the dislocation part of the blade flange hole, and can apply acting force vertical to the axis of the flange hole to the blade flange; the middle part of the positioning pin is cylindrical and is in clearance fit with the flange hole with higher precision;
one end of the correcting screw is a thickened hexagonal head, and the maximum diameter of the thickened hexagonal head is larger than the diameter of a flange hole of the variable-pitch bearing; the other end of the correcting screw is provided with a coarse thread and an external thread which are screwed with the internal thread of the clamping part of the positioning pin;
one end of the recovery screw rod is provided with a coarse thread and an external thread which can be screwed with the internal thread of the clamping part of the positioning pin.
Furthermore, one end of the correction screw rod is connected with the hub through a gasket, and the other end of the recovery screw rod is connected with the hub through a gasket.
Referring to fig. 1 and 2, the positioning pin 1 includes a clamping portion 8, a large diameter portion 9, and a tapered portion 10; the correcting screw 2 is used for correcting; the recovery screw 4 is used for recovering the positioning pin after the correction is finished; a gasket 3 is also arranged;
the positioning pin 1 is made of hard alloy steel, the end face of the upper part (the clamping part 8) of the positioning pin is provided with a coarse thread internal thread, and the side face of the positioning pin is provided with a boss which can be matched with a wrench for use; the middle part (the large diameter part 9) is cylindrical and is in clearance fit with the flange hole with higher precision; the lower part (the conical part 10) is a cone with a larger slope, is in smooth transition with the middle part (the large-diameter part 9), can be contacted with the dislocation part of the blade flange 5, and can apply acting force vertical to the axis of the blade flange hole to the blade flange 5.
The one end of correcting screw 2 is thickening hexagon head, and its maximum diameter is greater than the 6 flange hole diameters of change oar bearing, and hexagon head upper portion is provided with the conical body, contacts with wheel hub 7 through gasket 3. The other end of the correcting screw rod 2 is provided with a coarse thread and an external thread which are matched with the internal thread of the clamping part 8 of the positioning pin 1.
Retrieve 4 one end of screw rod and be thick tooth external screw thread, with the interior screw-thread fit of 1 clamping part of locating pin, the other end is the hexagonal head of thickening, contacts with wheel hub 7 through gasket 3.
In the embodiment, a manual or electric wrench is adopted to rotate the correcting screw 2 or the recovery screw 4, and the positioning pin 1 can move downwards or upwards along the axial direction of the flange hole of the variable-pitch bearing 6 under the rotation action of the correcting screw 2 or the recovery screw 4;
specifically, 3 positioning pins 1 uniformly arranged at 120 ° are used for correction.
The method of use of this example is as follows:
the first step is as follows: and in the case of low wind, the wind turbine generator is in a maintenance mode, the tip of the blade to be corrected is vertically downward, and the wind turbine lock is locked.
The second step is that: using a hydraulic torque wrench, all nuts of the blade are loosened 1/2 turns first in the diagonal crisscross order, then all nuts are loosened 1/2 turns again in the diagonal crisscross order, i.e. finally 1 turn of each nut is loosened.
The third step: and manually changing the pitch, and aligning the dislocation hole to be corrected with the hub process hole 11. And (4) removing the blade bolt on the hole to be corrected by using a hydraulic torque wrench. If the dislocation is large, so that the bolt cannot be taken out, blade bolts of other hole positions can be tried.
The fourth step: the spacer 3, the positioning pin 1 and the correcting screw 2 are assembled as shown in fig. 1 by using the hub fabrication hole 11. The spanner rotates the correcting screw rod 2 anticlockwise, and simultaneously the other spanner clamps the clamping part 8 of the positioning pin 1, so that the positioning pin 1 moves downwards. And measuring the distance between the upper end surface of the positioning pin 1 and the end surface of the variable pitch bearing 6, and stopping rotating the correcting screw rod 2 when the preset position is reached. Then, the spanner rotates the correcting screw rod 2 clockwise, takes out the correcting screw rod 2 and the gasket 3, and the first positioning pin is in place.
The fifth step: and repeating the second step to the fourth step, and respectively inserting a second positioning pin and a third positioning pin at intervals of 120 degrees.
And a sixth step: all blade bolts were first tightened for 50% of the rated torque in a diagonal criss-cross sequence using a hydraulic torque wrench.
The seventh step: assembling the gasket 3 and the recovery screw rod 4 as shown in fig. 2, rotating the recovery screw rod 4 clockwise by a spanner, and taking out 3 positioning pins in sequence. Then, the bolts are installed and a hydraulic torque wrench is used to tighten 50% of the rated torque for the first time.
Eighth step: and (5) using a hydraulic torque wrench, fastening all the blade bolts with 100% torque for the second time according to the sequence of diagonal and criss-cross, and finishing the dislocation correction.
Claims (2)
1. A tower correction device for dislocation of a wind power blade flange hole is characterized by comprising a positioning pin, a correction screw rod and a recovery screw rod, wherein one end face of the positioning pin is provided with a coarse-tooth internal thread; the other end of the positioning pin is a cone with a larger slope, is in smooth transition with the large-diameter part, can be contacted with the dislocation part of the blade flange hole, and can apply acting force vertical to the axis of the flange hole to the blade flange; the middle part of the positioning pin is cylindrical and is in clearance fit with the flange hole with higher precision; one end of the correcting screw is a thickened hexagonal head, and the maximum diameter of the thickened hexagonal head is larger than the diameter of a flange hole of the variable-pitch bearing; the other end of the correcting screw is provided with a coarse thread and an external thread which are screwed with the internal thread of the clamping part of the positioning pin; one end of the recovery screw rod is provided with a coarse thread and an external thread which can be screwed with the internal thread of the clamping part of the positioning pin.
2. The tower-mounted correcting device for the flange hole dislocation of the wind power blade as claimed in claim 1, wherein one end of the correcting screw rod is connected with the hub through a gasket, and the other end of the recovering screw rod is connected with the hub through a gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922032136.1U CN211759737U (en) | 2019-11-22 | 2019-11-22 | Tower correcting device for dislocation of flange holes of wind power blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922032136.1U CN211759737U (en) | 2019-11-22 | 2019-11-22 | Tower correcting device for dislocation of flange holes of wind power blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211759737U true CN211759737U (en) | 2020-10-27 |
Family
ID=72960668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922032136.1U Active CN211759737U (en) | 2019-11-22 | 2019-11-22 | Tower correcting device for dislocation of flange holes of wind power blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211759737U (en) |
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2019
- 2019-11-22 CN CN201922032136.1U patent/CN211759737U/en active Active
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