A hanging arm type row hole drilling die for a wind turbine rotor bracket
By designing a hanging arm type hole drilling die, using the combination of positioning plate and compression plate, the problems of long drilling and laying holes on the inner circular surface of the wind turbine rotor bracket in the prior art are solved, and efficient and accurate drilling is achieved, reducing operating strength and production costs.
Patent Information
- Application Number
- CN202421285381.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The drilling and laid holes on the inner circular surface of the existing wind turbine rotor bracket have a long processing time, low production efficiency, and high production cost of the integrated drilling mold, which requires redesign and manufacturing after replacement.
A hanging arm type drilling die is designed. Through the combination of drilling die, positioning plate and compression plate, the positioning holes on the end face of the yoke and the arc plate on the inner wall are used to ensure the positioning die of the drilling die is stable and accurate, reduce friction and facilitate movement.
It effectively reduces the overall drilling die manufacturing cost, ensures the position accuracy of the drilling die during drilling, reduces the labor intensity of the operators, and improves production efficiency.
Smart Images
Figure CN222710894U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind power generation, in particular to a hanging arm type row hole drilling die for a rotor support of a wind power generator. Background Art
[0002] In wind turbines, the inner surface of the rotor bracket yoke is usually drilled with a CNC gantry boring and milling machine to drill threaded bottom holes, which takes a long time to process and has low production efficiency. Later, an integral drilling mold was used to drill the holes, but the mold production cost is very high, and after the product is changed, the integral drilling mold needs to be redesigned and manufactured. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the disadvantages of the prior art and provide a hanging arm type row hole drilling die for a rotor support of a wind turbine generator.
[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:
[0005] A wind turbine rotor bracket hanging arm type row hole drilling die, comprising:
[0006] A drilling template, on which a plurality of drilling holes are opened;
[0007] A positioning plate, fixedly mounted at one end of the drilling template in the length direction;
[0008] The clamping plate is fixedly mounted on the side of the positioning plate away from the drilling template, and a slot is formed between the clamping plate and the drilling template for the side wall of the rotor bracket to extend into, and clamping bolts are vertically penetrated on the clamping plate.
[0009] As a preferred solution of the arm-type hole drilling die for the rotor support of the wind turbine of the utility model, a plurality of first positioning holes are opened on the yoke end surface of the rotor support, and the plurality of first positioning holes are evenly arranged on the same circumference, and the axis of the circumference coincides with the axis of the rotor support;
[0010] A second positioning hole is provided on the positioning plate, and when the side wall of the rotor support is located in the slot body, the distance between the second positioning hole and the axis of the rotor support is equal to the distance between the first positioning hole and the axis of the rotor support.
[0011] As a preferred solution of the utility model wind turbine rotor bracket hanging arm type row hole drilling template, wherein: at least two installation grooves are opened on the positioning plate, the installation grooves are located between the clamping plate and the drilling template, and the installation grooves penetrate the positioning plate along the thickness direction of the positioning plate, a first eccentric shaft is rotatably installed in the installation groove, and the axis of the first eccentric shaft is perpendicular to the length direction of the drilling template, and the outer fixed sleeve of the first eccentric shaft is provided with a first bearing;
[0012] When the first eccentric shaft rotates to a first angle range, the lower end surface of the first bearing is lower than the lower end surface of the positioning plate. When the first eccentric shaft rotates to a second angle range, the lower end surface of the first bearing is higher than the lower end surface of the positioning plate.
[0013] As a preferred solution of the wind turbine rotor bracket hanging arm type hole drilling template of the utility model, one end of the first eccentric shaft passes through the clamping plate and extends outside the clamping plate, and the outer side of the first eccentric shaft located outside the clamping plate is sleeved with a first locking nut for locking the first eccentric shaft.
[0014] As a preferred solution of the utility model of the hanging arm type row hole drilling template of the wind turbine rotor support, wherein: at least two second eccentric shafts are rotatably mounted on the positioning plate, and the axes of the second eccentric shafts are parallel to the length direction of the drilling template, and the outer fixed sleeve of the second eccentric shaft is provided with a second bearing;
[0015] When the side wall of the rotor bracket is located in the slot body and the second eccentric shaft rotates to the first angle range, the second bearing is adjacent to the side of the drilling template and fits the drilling template; when the side wall of the rotor bracket is located in the slot body and the second eccentric shaft rotates to the second angle range, a gap is left between the second bearing and the side of the drilling template.
[0016] As a preferred solution of the wind turbine rotor bracket hanging arm type hole drilling template of the utility model, one end of the second eccentric shaft passes through the positioning plate and extends above the positioning plate, and the outer side of the second eccentric shaft located above the positioning plate is provided with a second locking nut for locking the second eccentric shaft.
[0017] As a preferred solution of the utility model of the hanging arm type hole drilling template for the rotor support of the wind turbine, a plurality of arc plates are fixedly installed on the side of the drilling template facing the clamping plate, and the plurality of arc plates are arranged in sequence and equidistantly along the length direction of the drilling template, and the curvature of each arc plate is equal to the curvature of the side wall of the rotor support.
[0018] As a preferred solution of the wind turbine rotor bracket hanging arm type hole drilling template of the utility model, a counterweight arm is fixedly installed at the other end of the drilling template in the length direction, and the counterweight arm is located on the side of the drilling template away from the clamping plate.
[0019] As a preferred solution of the wind turbine rotor support hanging arm type hole drilling die of the utility model, a hanging ring is fixedly installed on the positioning plate.
[0020] As a preferred solution of the wind turbine rotor bracket hanging arm type row hole drilling template of the utility model, two rows of drilling holes are opened on the drilling template, and each row of drilling holes includes a plurality of drilling holes arranged in sequence and equidistantly along the length direction of the drilling template.
[0021] The beneficial effects of the utility model are:
[0022] (1) The utility model is based on the positional relationship between the mounting holes on the end face of the yoke of the rotor bracket and the row of holes on the inner wall, takes the end face of the yoke and the arc of the inner wall as positioning surfaces, designs a hanging arm type row hole drilling die, determines the positioning and fixing method of the drilling die and the yoke, which not only avoids the high manufacturing cost of the overall drilling die, but also ensures the position accuracy of the row hole drilling die during drilling, reduces the labor intensity of workers, and improves production efficiency.
[0023] (2) The utility model has a plurality of arc-shaped plates fixedly mounted on one side of the drilling template. When the hanging arm type drilling template is placed on the rotor bracket, the outer arc surface of the arc-shaped plate on the drilling template fits with the inner side surface of the rotor bracket, thereby ensuring the position stability of the drilling template.
[0024] (3) The utility model provides an installation groove on the positioning plate, and a first eccentric shaft is rotatably installed in the installation groove. A first bearing is sleeved on the outer side of the first eccentric shaft, and the first bearing is located in the installation groove. By rotating the first eccentric shaft, the first bearing can lift the positioning plate, so that a gap is generated between the positioning plate and the end face of the rotor bracket yoke. In this way, when the end face of the rotor bracket yoke is translated, the sliding friction of the hanging arm type hole arrangement drilling die is changed into rolling friction, which effectively reduces the friction between the hanging arm type hole arrangement drilling die and the rotor bracket, thereby facilitating the movement of the hanging arm type hole arrangement drilling die.
[0025] (4) The utility model has two second eccentric shafts rotatably mounted on the positioning plate, and second bearings are sleeved on the outer sides of the second eccentric shafts. When the side wall of the rotor bracket is located in the groove body between the clamping plate and the drilling template, the second eccentric shaft can be rotated so that the side surface of the second bearing can fit with the drilling template. In this way, when the hanging arm type hole arrangement drilling template is translated along the rotor bracket, the sliding friction between the side wall of the rotor bracket and the clamping plate is changed into rolling friction between the side wall of the rotor bracket and the second bearing, which effectively reduces the friction between the hanging arm type hole arrangement drilling template and the rotor bracket, thereby facilitating the movement of the hanging arm type hole arrangement drilling template. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0027] Figure 1 A schematic diagram of the structure of the arm-hanging hole drilling die for the rotor support of a wind turbine provided by the utility model;
[0028] Figure 2 for Figure 1Side view of
[0029] Figure 3 for Figure 1 A top view of
[0030] Figure 4 A front view of a clamping plate in a hanging arm type hole drilling die for a rotor support of a wind turbine provided by the utility model;
[0031] Figure 5 for Figure 1 A cross-sectional view of the middle AA;
[0032] Figure 6 for Figure 3 A cross-sectional view of the middle BB;
[0033] Figure 7 for Figure 4 Cross-sectional view of CC;
[0034] Among them: 1. drilling template; 2. drilling template hole; 3. positioning plate; 4. clamping plate; 5. trough body; 6. clamping bolt; 7. second positioning hole; 8. mounting groove; 9. first eccentric shaft; 10. first bearing; 11. first locking nut; 12. second eccentric shaft; 13. second bearing; 14. second locking nut; 15. arc plate; 16. counterweight arm; 17. lifting ring; 18. positioning pin. DETAILED DESCRIPTION
[0035] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below according to specific implementation methods and in combination with the accompanying drawings.
[0036] Figure 1 A schematic diagram of the structure of a wind turbine rotor support hanging arm type row hole drilling template provided in an embodiment of the present application. The device comprises a drilling template 1, a positioning plate 3 and a clamping plate 4. The drilling template 1 can be fixedly placed on the rotor support to be drilled through the positioning plate 3 and the clamping plate 4, and then the row holes are cut through the drilling template holes 2 on the drilling template 1.
[0037] For details, see Figure 1 The drilling template 1 is in a rectangular shape and has two rows of drilling holes 2. Each row of drilling holes 2 includes a plurality of drilling holes 2 that are equidistantly arranged in sequence along the length direction of the drilling template 1. Any drilling hole 2 in one row of drilling holes 2 is located at the same height as an adjacent drilling hole 2 in another row of drilling holes 2.
[0038] The positioning plate 3 is fixedly mounted on the upper end of the drilling template 1 by bolts, and the plane where the positioning plate 3 is located is perpendicular to the plane where the drilling template 1 is located. The clamping plate 4 is fixedly mounted on the side of the positioning plate 3 away from the drilling template 1, and the plane where the clamping plate 4 is located is parallel to the plane where the drilling template 1 is located. A slot 5 is formed between the clamping plate 4 and the drilling template 1 for the side wall of the rotor bracket to extend into, and a clamping bolt 6 is vertically penetrated through the clamping plate 4.
[0039] When the above-mentioned hanging arm type drilling template for the rotor support of the wind turbine generator is placed on the end face of the rotor support yoke to be drilled, the positioning plate 3 fits with the end face of the rotor support yoke, the side wall of the rotor support extends into the groove 5 between the clamping plate 4 and the drilling template 1, and the drilling template 1 is located on the inner side of the rotor support yoke. At this time, by rotating the clamping bolt 6 so that the end of the clamping bolt 6 abuts against the outer side of the rotor support side wall, the above-mentioned hanging arm type drilling template can be fixedly clamped on the rotor support, and then the fitter can use the magnetic base drill to adsorb on the inner plane of the drilling template 1 to carry out the drilling operation.
[0040] Preferably, since the drilling template 1 is relatively long, it is difficult to maintain the verticality of the drilling template 1 only by the clamping bolts 6 on the clamping plate 4 when the hanging arm type row hole drilling template is clamped. Therefore, a counterweight arm 16 is fixedly installed at the lower end of the drilling template 1, and the counterweight arm 16 is located on the side of the drilling template 1 away from the clamping plate 4. The length direction of the counterweight arm 16 is perpendicular to the length direction of the drilling template 1. When the hanging arm type row hole drilling template is clamped, the counterweight arm 16 can be lifted by a jack to make the counterweight arm 16 parallel to the horizontal plane, so that the verticality of the drilling template 1 after the hanging arm type row hole drilling template is clamped can be ensured, thereby ensuring that the position of the drilling template hole 2 on the drilling template 1 is aligned with the position of the hole to be drilled on the side wall of the rotor bracket.
[0041] See also Figure 2 In order to ensure the fit between the drilling template 1 and the inner side wall of the rotor bracket, three arc plates 15 are fixedly installed on the side of the drilling template 1 facing the clamping plate 4. The three arc plates 15 are arranged in sequence and equidistantly along the length direction of the drilling template 1, and the curvature of each arc plate 15 is equal to the curvature of the inner side wall of the rotor bracket. When the clamping bolt 6 on the clamping plate 4 abuts against the outer side wall of the rotor bracket and the jack lifts the counterweight arm 16, the outer arc surface of the arc plate 15 on the drilling template 1 fits with the inner side surface of the rotor bracket, ensuring the position stability of the drilling template 1.
[0042] A plurality of first positioning holes are provided on the end surface of the yoke of the rotor support, and the plurality of first positioning holes are evenly arranged on the same circumference, and the axis of the circumference coincides with the axis of the rotor support. Figure 3, two second positioning holes 7 are provided on the positioning plate 3. When the side wall of the rotor bracket is located in the slot body 5, the distance between the second positioning hole 7 and the axis of the rotor bracket is equal to the distance between the first positioning hole and the axis of the rotor bracket. At this time, by translating the positioning plate 3, the second positioning hole 7 on the positioning plate 3 can be aligned with any first positioning hole on the end face of the yoke. After that, by inserting the positioning pin 18 into the aligned second positioning hole 7 and the first positioning hole, the positioning of the positioning plate 3 can be achieved, thereby ensuring the position stability of the drilling template 1 for drilling operation.
[0043] It is understandable that after completing one clamping and drilling, it is necessary to loosen the clamping bolt 6 and close the jack, and then move the arm-type hole arrangement drilling die to another station and drill holes.
[0044] See also Figure 3 Two mounting grooves 8 are provided on the positioning plate 3, and both mounting grooves 8 are located between the clamping plate 4 and the drilling template 1, and the mounting grooves 8 penetrate the positioning plate 3 along the thickness direction of the positioning plate 3. A first eccentric shaft 9 is rotatably mounted in each mounting groove 8. The axis of the first eccentric shaft 9 is perpendicular to the length direction of the drilling template 1. A first bearing 10 is fixedly sleeved on the outer side of the first eccentric shaft 9, and the first bearing 10 is located in the mounting groove 8.
[0045] It should be noted that when the first eccentric shaft 9 rotates to the first angle range, the lower end surface of the first bearing 10 is lower than the lower end surface of the positioning plate 3. When the first eccentric shaft 9 rotates to the second angle range, the lower end surface of the first bearing 10 is higher than the lower end surface of the positioning plate 3.
[0046] It can be understood that when the hanging arm type hole arrangement drilling die is placed on the end face of the rotor support yoke to be drilled, and the positioning plate 3 is in contact with the end face of the rotor support yoke, by rotating the first eccentric shaft 9 to the first angle range, the lower end face of the first bearing 10 can be lower than the lower end face of the positioning plate 3, so that the first bearing 10 can lift the positioning plate 3, so that a gap of about 1 mm is generated between the positioning plate 3 and the end face of the rotor support yoke, and then the contact between the positioning plate 3 and the end face of the rotor support yoke is changed to the contact between the first bearing 10 and the end face of the rotor support yoke. In this way, when the hanging arm type hole arrangement drilling die is translated on the end face of the rotor support yoke, the sliding friction will be changed to rolling friction, which effectively reduces the friction between the hanging arm type hole arrangement drilling die and the rotor support, thereby facilitating the movement of the hanging arm type hole arrangement drilling die. After the arm-type hole arrangement drilling die is moved to a predetermined position, the first eccentric shaft 9 can be rotated to a second angle range so that the lower end surface of the first bearing 10 is higher than the lower end surface of the positioning plate 3. In this way, the positioning plate 3 contacts the end surface of the rotor bracket yoke again, which facilitates the positioning of the arm-type hole arrangement drilling die.
[0047] Better, see Figure 6, one end of the two first eccentric shafts 9 passes through the clamping plate 4 and extends outside the clamping plate 4. The outer side of the first eccentric shaft 9 outside the clamping plate 4 is sleeved with a first locking nut 11 for locking the first eccentric shaft 9. When the first eccentric shaft 9 is rotated to a desired angle, the first locking nut 11 can be rotated to fix the angle of the first eccentric shaft 9.
[0048] See also Figure 4 Two second eccentric shafts 12 are rotatably mounted on the positioning plate 3. The two second eccentric shafts 12 are respectively located at both ends of the length direction of the positioning plate 3. The axis of each second eccentric shaft 12 is parallel to the length direction of the drilling template 1. A second bearing 13 is provided on the outer fixed sleeve at the lower end of each second eccentric shaft 12.
[0049] Among them, when the side wall of the rotor bracket is located in the groove body 5 between the clamping plate 4 and the drilling template 1, and the second eccentric shaft 12 rotates to the first angle range, the second bearing 13 adjacent to the side of the drilling template 1 will fit with the drilling template 1, so that when the hanging arm type hole arrangement drilling template is translated along the rotor bracket, the sliding friction between the side wall of the rotor bracket and the clamping plate 4 will be changed into the rolling friction between the side wall of the rotor bracket and the second bearing 13, which effectively reduces the friction between the hanging arm type hole arrangement drilling template and the rotor bracket, thereby facilitating the movement of the hanging arm type hole arrangement drilling template.
[0050] Better, see Figure 7 , the upper end of the second eccentric shaft 12 passes through the positioning plate 3 and extends above the positioning plate 3. The outer side of the second eccentric shaft 12 located above the positioning plate 3 is sleeved with a second locking nut 14 for locking the second eccentric shaft 12. When the second eccentric shaft 12 is rotated to a desired angle, the second locking nut 14 can be rotated to fix the angle of the second eccentric shaft 12.
[0051] In addition, a lifting ring 17 is fixedly installed on the positioning plate 3. The operator can lift the arm-type hole arrangement drilling die by a crane and lift it to a predetermined position.
[0052] When the above-mentioned hanging arm type row hole drilling template of the wind turbine rotor support is in use, the operator lifts the hanging arm type row hole drilling template by a crane, places it on the rotor support, and makes the positioning plate 3 fit with the end face of the yoke, the clamping plate 4 is located on the outside of the rotor support, and the drilling template 1 is located on the inside of the rotor support, and the two second positioning holes 7 on the positioning plate 3 are aligned with the two corresponding first positioning holes on the end face of the rotor support yoke. Then, the positioning pin 18 is inserted into the aligned first positioning hole and the second positioning hole 7, and the clamping bolt 6 on the clamping plate 4 is rotated, and the counterweight arm 16 is lifted by a jack at the same time, so that the arc plate 15 on the drilling template 1 is close to the inner wall of the rotor support. Then, the operator uses a magnetic drill to adsorb on the inner plane of the drilling template 1 to carry out drilling operations (drilling of two rows of holes is completed in one clamping). After the first clamping and drilling is completed, loosen the clamping bolt 6 on the clamping plate 4, close the jack, and rotate the first eccentric shaft 9. The first bearing 10 lifts the positioning plate 3 driven by the first eccentric shaft 9, so that a gap of about 1 mm is generated between the positioning plate 3 and the end face of the rotor bracket yoke, and then the first eccentric shaft 9 is locked by the first locking nut 11. Then, rotate the second eccentric shaft 12, so that the side of the second bearing 13 fits with the outer wall of the rotor bracket yoke, and then lock the second locking nut 14, pull out the positioning pin 18, and then push the hanging arm. Move the row hole drilling template to another station, and insert the positioning pin 18 again after aligning the second positioning hole 7 on the positioning plate 3 with the corresponding first positioning hole on the end face of the rotor bracket yoke, and loosen the first locking nut 11 and the second locking nut 14. Then rotate the first eccentric shaft 9 to make the supporting point of the first bearing 10 leave the end face of the rotor bracket yoke, and the positioning plate 3 fits with the end face of the yoke again. Then use the jack to lift the counterweight arm 16 again, and tighten the clamping bolt 6 to make the arc plate 15 close to the inner wall of the rotor bracket yoke. After that, the operator uses the magnetic base drill to adsorb on the inner plane of the drilling template 1 to carry out drilling operations. Repeat the above process until all the row holes are processed.
[0053] Therefore, the technical solution of the present application alleviates the processing pressure of the CNC gantry boring and milling machine. Under the premise of avoiding the high manufacturing cost of the overall drilling mold, it designs and manufactures the hanging arm type hole arrangement drilling mold with a low-cost design concept to ensure the position of the hole arrangement drilling mold during drilling, reduce the labor intensity of the operator, and improve production efficiency.
[0054] In addition to the above embodiments, the present invention may also have other implementation modes; any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.
Claims
1. A wind turbine rotor bracket hanging arm type row hole drilling die, characterized in that: include: A drilling template (1) having a plurality of drilling template holes (2) formed thereon; A positioning plate (3) is fixedly mounted on one end of the drilling template (1) in the length direction; A clamping plate (4) is fixedly mounted on a side of the positioning plate (3) away from the drilling template (1), and a groove (5) is formed between the clamping plate (4) and the drilling template (1) for the side wall of the rotor bracket to extend into, and a clamping bolt (6) is vertically penetrated through the clamping plate (4).
2. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: A plurality of first positioning holes are formed on the yoke end surface of the rotor support, and the plurality of first positioning holes are evenly arranged on the same circumference, and the axis of the circumference coincides with the axis of the rotor support; The positioning plate (3) is provided with a second positioning hole (7), and when the side wall of the rotor support is located in the slot body (5), the distance between the second positioning hole (7) and the axis of the rotor support is equal to the distance between the first positioning hole and the axis of the rotor support.
3. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: At least two mounting grooves (8) are provided on the positioning plate (3), the mounting grooves (8) are located between the clamping plate (4) and the drilling template (1), and the mounting grooves (8) penetrate the positioning plate (3) along the thickness direction of the positioning plate (3), a first eccentric shaft (9) is rotatably mounted in the mounting grooves (8), and the axis of the first eccentric shaft (9) is perpendicular to the length direction of the drilling template (1), and a first bearing (10) is provided on the outer fixed sleeve of the first eccentric shaft (9); When the first eccentric shaft (9) rotates to a first angle range, the lower end surface of the first bearing (10) is lower than the lower end surface of the positioning plate (3); when the first eccentric shaft (9) rotates to a second angle range, the lower end surface of the first bearing (10) is higher than the lower end surface of the positioning plate (3).
4. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 3, characterized in that: One end of the first eccentric shaft (9) passes through the clamping plate (4) and extends outside the clamping plate (4); a first locking nut (11) for locking the first eccentric shaft (9) is sleeved on the outer side of the first eccentric shaft (9) outside the clamping plate (4).
5. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: At least two second eccentric shafts (12) are rotatably mounted on the positioning plate (3), and the axes of the second eccentric shafts (12) are parallel to the length direction of the drilling template (1), and the outer fixed sleeve of the second eccentric shaft (12) is provided with a second bearing (13); When the side wall of the rotor support is located in the slot body (5) and the second eccentric shaft (12) is rotated to a first angle range, the second bearing (13) is adjacent to the side of the drilling template (1) and fits the drilling template (1); when the side wall of the rotor support is located in the slot body (5) and the second eccentric shaft (12) is rotated to a second angle range, a gap is left between the second bearing (13) and the side of the drilling template (1) and the drilling template (1).
6. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 5, characterized in that: One end of the second eccentric shaft (12) passes through the positioning plate (3) and extends above the positioning plate (3); a second locking nut (14) for locking the second eccentric shaft (12) is sleeved on the outer side of the second eccentric shaft (12) located above the positioning plate (3).
7. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: A plurality of arc-shaped plates (15) are fixedly mounted on one side of the drilling template (1) facing the clamping plate (4), and the plurality of arc-shaped plates (15) are arranged in sequence and at equal intervals along the length direction of the drilling template (1), and the curvature of each arc-shaped plate (15) is equal to the curvature of the side wall of the rotor bracket.
8. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: A counterweight arm (16) is fixedly mounted on the other end of the drilling template (1) in the length direction, and the counterweight arm (16) is located on a side of the drilling template (1) away from the clamping plate (4).
9. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: A lifting ring (17) is fixedly mounted on the positioning plate (3).
10. The wind turbine rotor bracket hanging arm type row hole drilling die according to claim 1, characterized in that: The drilling template (1) is provided with two rows of drilling holes (2), and each row of drilling holes (2) comprises a plurality of drilling holes (2) which are arranged in sequence and at equal distances along the length direction of the drilling template (1).