Machining device for pin hole in end face of wind power main shaft

Abstract

The utility model provides a machining device for a pin hole in the end face of a wind power spindle, and relates to the field of wind power spindle machining. A pin hole to be machined and a spigot used for positioning are formed in the end face of the wind power main shaft, the spigot is arranged in the circumferential direction of the end face of the wind power main shaft, the machining device comprises a boring template, a cutter, a driving device and a universal joint, the boring template is fixedly arranged on the end face of the wind power main shaft, and a die hole matched with the pin hole to be machined is formed in the boring template. The die hole penetrates in the axial direction of the boring die plate. The cutter sequentially penetrates through the die hole and the to-be-machined pin hole to extend out of the end face of the wind power main shaft, and the cutter is rotationally arranged in the die hole and the to-be-machined pin hole; the output end of the driving device is connected with the cutter, and the driving device drives the cutter to rotate and move in the axial direction of the to-be-machined hole; and the universal joint is fixedly connected with the output end of the driving device and the cutter respectively. The machining device is high in machining precision and low in cost, and the machining environment is not limited.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine main shaft processing, specifically to a processing device for pin holes on the end face of wind turbine main shafts. Background Technology

[0002] The wind turbine main shaft is a key component in the wind turbine's drivetrain, primarily transmitting the rotational kinetic energy from the wind turbine to the gearbox. Due to the increasing size of individual wind turbines, traditional expansion locking methods are no longer effective in transmitting the torque from the wind turbine, leading to slippage due to insufficient locking force. Therefore, large-MW wind turbine main shafts utilize end-face locking pins for connection to the gearbox. This method features several pin holes on the small end face of the main shaft for fixing and connecting the main shaft and gearbox, ensuring the stable operation of the entire wind power system. Considering the dynamic loads and vibrations experienced by the wind turbine during operation, high dimensional and positional accuracy of the pin holes is required to ensure the stability and reliability of the connection, for example, within 0.08mm. Therefore, the machining quality of the end-face pin holes must be highly valued during the manufacturing process of the wind turbine main shaft. However, traditional pin hole machining methods suffer from high costs and limited production capacity. Utility Model Content

[0003] In view of the problems existing in the prior art, the present invention provides a processing device for pin holes on the end face of wind turbine main shaft, so as to improve the problems of high cost and limited production capacity of traditional pin hole processing methods.

[0004] To achieve the above and other related objectives, this utility model provides a machining device for pin holes on the end face of a wind turbine main shaft. The end face of the wind turbine main shaft has a pin hole to be machined and a positioning stop. The stop is arranged circumferentially along the end face of the wind turbine main shaft. The machining device includes a boring plate, a cutting tool, a drive device, and a universal joint. The boring plate is fixedly mounted on the end face of the wind turbine main shaft and has a die hole that matches the pin hole to be machined. The die hole penetrates the boring plate axially. The cutting tool passes through the die hole and the pin hole to be machined sequentially and extends out from the end face of the wind turbine main shaft. The cutting tool is rotatably mounted within the die hole and the pin hole to be machined. The output end of the drive device is connected to the cutting tool, and the drive device drives the cutting tool to rotate and move axially along the hole to be machined. The universal joint is fixedly connected to the output end of the drive device and the cutting tool.

[0005] In one embodiment of this utility model, the cutting tool includes a tool shank and a cutting head, one end of the tool shank is fixedly connected to the universal joint, and the other end of the tool shank is fixedly connected to the cutting head.

[0006] In one embodiment of this utility model, the cutter bar is rotatably mounted in the die hole via a bearing.

[0007] In one embodiment of this utility model, a boss is provided at one end of the die hole near the pin hole to be processed, and the bottom of the bearing abuts against the boss.

[0008] In one embodiment of this utility model, a pressure plate is fixedly provided on the side of the boring template away from the end face of the wind turbine main shaft, the pressure plate is fitted on the tool holder, and the top of the bearing abuts against the pressure plate.

[0009] In one embodiment of this utility model, a first sealing ring is provided between the bearing and the boss.

[0010] In one embodiment of this utility model, a second sealing ring is provided between the bearing and the pressure plate.

[0011] In one embodiment of the present invention, the boring template includes a fixed plate and a protrusion that matches the stop. The fixed plate is fixedly connected to the end face of the wind turbine main shaft, and the protrusion is coaxially arranged and fixedly connected to the fixed plate.

[0012] In one embodiment of the present invention, at least four positioning grooves are provided on the outer periphery of the fixing plate, and the at least four positioning grooves are evenly distributed along the circumference of the fixing plate, with the positioning grooves exposing the protrusion.

[0013] This utility model discloses a machining device for pin holes on the end face of wind turbine main shafts. The boring plate has a die hole that matches the pin hole to be machined. The die hole extends axially through the boring plate. The cutting tool passes through the die hole and the pin hole in sequence, extending out from the end face of the wind turbine main shaft to machine the pin hole. In this machining device, the cutting tool is connected to the drive device via a universal joint, which can compensate for the misalignment between the output end and the cutting tool, improving the machining accuracy of the pin hole. Simultaneously, it significantly reduces equipment costs, and the equipment is not limited by the operating environment, allowing for mass production and effectively increasing production capacity. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a wind turbine main shaft in the existing technology;

[0016] Figure 2This is an installation diagram of one embodiment of the processing device for the pin hole on the end face of the wind turbine main shaft according to the present invention;

[0017] Figure 3 This is an installation cross-sectional view of one embodiment of the processing device for the pin hole on the end face of the wind turbine main shaft according to the present invention;

[0018] Figure 4 This is a schematic diagram of the cutting tool in one embodiment of the processing device for the pin hole on the end face of the wind turbine main shaft according to the present invention;

[0019] Figure 5 This is a top view of the boring template in one embodiment of the processing device for the pin hole of the end face of the wind turbine main shaft according to the present invention;

[0020] Figure 6 This is a side view of the boring template in one embodiment of the processing device for the pin hole of the end face of the wind turbine main shaft according to the present invention;

[0021] Figure 7 This is a cross-sectional view of the installation of the processing device for the pin hole on the end face of the wind turbine main shaft according to another embodiment of the present invention.

[0022] Component designation explanation:

[0023] 10. Wind turbine main shaft; 101. Pin hole to be machined; 102. Stop; 100. Boring template; 110. Die hole; 111. Boss; 120. Fixing plate; 121. Positioning groove; 122. Feeler gauge; 130. Protrusion; 200. Cutting tool; 210. Tool holder; 220. Tool head; 300. Universal joint; 400. Bearing; 500. Pressure plate; 600. First sealing ring; 700. Second sealing ring. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0025] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0026] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0027] Please see Figure 1 The end face of a wind turbine main shaft has pin holes to be machined and a stop for positioning, with the stop circumferentially positioned along the end face of the main shaft. Traditional pin hole boring methods heavily rely on machine tool precision, requiring high-precision imported equipment and a temperature-controlled workshop to meet the dimensional and positional requirements of the pin holes. Machine tools capable of this pin hole machining are expensive and have limited operating environments, making this process impossible with ordinary equipment. Furthermore, the production model of a temperature-controlled workshop and high-precision machine tools restricts mass production, resulting in high production costs and limited capacity. Therefore, this application provides a machining device for pin holes on the end face of a wind turbine main shaft to solve the problem of high machining costs when high precision is required for pin hole machining on the end face of a wind turbine main shaft.

[0028] Please see Figure 2 and Figure 3The present invention provides a machining device for pin holes on the end face of a wind turbine main shaft, comprising a boring template 100, a cutting tool 200, a drive device (not shown in the figure), and a universal joint 300. The boring template 100 is fixedly mounted on the end face of the wind turbine main shaft 10, and has a die hole 110 that matches the pin hole 101 to be machined, the die hole 110 penetrating along the axial direction of the boring template 100; the cutting tool 200 passes sequentially through the die hole 110 and the pin hole 101 to be machined, extending out from the end face of the wind turbine main shaft 10, and is rotatably mounted within the die hole 110 and the pin hole 101 to be machined; the output end of the drive device is connected to the cutting tool 200, and the drive device drives the cutting tool 200 to rotate and move along the axial direction of the hole to be machined; the universal joint 300 is fixedly connected to the output end of the drive device and the cutting tool 200 respectively. The type of drive device is not limited here; any machine tool commonly used in the art can be used. It should be noted that the detailed structure of the machine tool and universal joint 300 can be found in existing technology and will not be elaborated further here. The machining apparatus of this application connects the output end of the drive device to the tool 200 via the universal joint 300. The universal joint 300 can perform angular compensation to counteract the misalignment between the output end and the tool 200, thereby improving the machining accuracy of the pin hole 101. The machining apparatus of this application can significantly reduce equipment costs and is not limited by the operating environment, making it suitable for mass production and effectively increasing production capacity.

[0029] Please see Figure 3 and Figure 4 In one embodiment, the cutting tool 200 includes a tool holder 210 and a cutting head 220. One end of the tool holder 210 is fixedly connected to a universal joint 300, and the other end of the tool holder 210 is fixedly connected to the cutting head 220. In this embodiment, the tool holder 210 is rotatably mounted in the die hole 110 via a bearing 400. This not only reduces the friction between the cutting tool 200 and the die hole 110, but also reduces the wobble of the cutting tool 200 during machining, thereby improving machining accuracy. The type of bearing 400 is not limited here; for example, a linear bearing 400 may be used. A boss 111 is provided at one end of the die hole 110 near the pin hole 101 to be machined. The bottom of the bearing 400 abuts against the boss 111. A pressure plate 500 is fixedly provided on the side of the boring template 100 away from the end face of the wind turbine main shaft 10. The pressure plate 500 is fitted onto the tool holder 210, and the top of the bearing 400 abuts against the pressure plate 500. For example, the pressure plate 500 and the boring template 100 are fixedly connected by screws. The boss 111 is provided at one end of the bearing 400, and the pressure plate 500 is provided at the other end of the bearing 400. The boss 111 and the pressure plate 500 can limit the bearing 400, prevent the bearing 400 from moving along its axial direction during the machining process, ensure the stability of the bearing 400, further ensure the stability of the tool 200, and improve the machining accuracy.

[0030] Please see Figure 2 and Figure 3In one embodiment, a first sealing ring 600 is provided between the bearing 400 and the boss 111, and a second sealing ring 700 is provided between the bearing 400 and the pressure plate 500. The first sealing ring 600 and the second sealing ring 700 can effectively prevent iron filings generated during processing from entering the bearing 400, ensuring the stable operation of the bearing 400. The material of the first sealing ring 600 and the second sealing ring 700 is not limited here. For example, the material of the first sealing ring 600 and the second sealing ring 700 is selected from elastic materials in the art capable of achieving sealing functions, such as nitrile rubber, fluororubber, silicone rubber, or polytetrafluoroethylene. The use of elastic materials for the first sealing ring 600 and the second sealing ring 700 allows them to absorb impact energy through their own elastic deformation, reducing the impact on the bearing 400 and the wear between the bearing 400 and the boss 111, and between the bearing 400 and the pressure plate 500, thereby enhancing the stability of the device.

[0031] Please see Figure 2 and Figures 5 to 7 In one embodiment, the boring template 100 includes a fixed plate 120 and a protrusion 130 that mates with a stop 102. The protrusion 130 is coaxially arranged with the fixed plate 120 and is fixedly connected to the fixed plate 120. Exemplarily, the fixed plate 120 and the protrusion 130 are integrally formed, and the fixed plate 120 is fixedly connected to the stop 102 by screws. The protrusion 130 and the stop 102 cooperate to position the boring template 100, ensuring the accuracy of the boring template 100 setting. In this embodiment, at least four positioning grooves 121 are provided on the outer periphery of the fixed plate 120. The at least four positioning grooves 121 are evenly distributed along the circumference of the fixed plate 120, and the positioning grooves 121 protrude from the protrusion 130. In this application, the number of positioning grooves 121 is adaptively adjusted according to actual needs. When the boring template 100 is placed on the end face of the wind turbine main shaft 10, the gap between the stop 102 and the protrusion 130 can be observed through the positioning grooves 121. A feeler gauge 122 of the same thickness is inserted into the gap between the stop 102 and the protrusion 130 to ensure that the gap between the circumferential stop 102 and the protrusion 130 along the end face of the wind turbine main shaft 10 remains consistent, thereby ensuring the coaxiality of the boring template 100 and the wind turbine main shaft 10.

[0032] Please see Figures 2 to 7The method of using the processing device for the pin hole on the end face of the wind turbine main shaft in this application is as follows: First, adjust the boring template 100 and the wind turbine main shaft 10 through the positioning groove 121 to ensure that the boring template 100 and the wind turbine main shaft 10 are coaxial. Then, fix the boring template 100 on the end face of the wind turbine main shaft 10, place the bearing 400 in the die hole 110 and fix the pressure plate 500 on its top. The cutting tool 200 passes through the die hole 110 and the pin hole 101 to be processed in sequence and extends out from the end face of the wind turbine main shaft 10. The end of the tool bar 210 away from the cutting head 220 is connected to the output end of the drive device through the universal joint 300. The drive device drives the tool bar 210 to rotate and move linearly along the axial direction of the hole to be processed to realize the processing of the pin hole 101 by the cutting head 220. After processing, remove the cutting tool 200, remove the pressure plate 500, remove the bearing 400, install the bearing 400 at the new pin hole 101 to be processed, and repeat the processing of the pin hole 101 to be processed until all the pin holes 101 to be processed are processed.

[0033] This utility model discloses a machining device for pin holes on the end face of wind turbine main shafts. The boring plate has a die hole that matches the pin hole to be machined. The die hole extends axially through the boring plate. The cutting tool passes through the die hole and the pin hole in sequence, extending out from the end face of the wind turbine main shaft to machine the pin hole. In this machining device, the cutting tool is connected to the drive device via a universal joint, which can compensate for the misalignment between the output end and the cutting tool, improving the machining accuracy of the pin hole. The machining accuracy of the pin hole can be controlled within 0.08mm, while significantly reducing equipment costs. Furthermore, the equipment is not limited by the operating environment and can be used for mass production, effectively increasing production capacity. Therefore, this utility model effectively overcomes some practical problems in the prior art, thus having high utilization value and practical significance.

[0034] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A machining device for a pin hole of an end face of a wind power main shaft, an end face of a wind power main shaft (10) is provided with a pin hole (101) to be machined and a stop opening (102) for positioning, the stop opening (102) is arranged along the circumference of the end face of the wind power main shaft (10), characterized in that, The application relates to a boring template (100) fixedly arranged on the end face of a wind power main shaft (10), wherein a die hole (110) matched with a pin hole (101) to be machined is arranged on the boring template (100), the die hole (110) penetrates along the axial direction of the boring template (100); a cutter (200) sequentially penetrates the die hole (110) and the pin hole (101) to be machined and extends out of the end face of the wind power main shaft (10), the cutter (200) is rotationally arranged in the die hole (110) and the pin hole (101) to be machined; a driving device is connected with the cutter (200) at the output end, the driving device drives the cutter (200) to rotate and move along the axial direction of the pin hole (101) to be machined; a universal joint (300) is fixedly connected with the output end of the driving device and the cutter (200) respectively. The cutter (200) comprises a cutter rod (210) and a cutter head (220), one end of the cutter rod (210) is fixedly connected with the universal joint (300), and the other end of the cutter rod (210) is fixedly connected with the cutter head (220). The cutter rod (210) is rotationally arranged in the die hole (110) through a bearing (400). One end of the die hole (110) close to the pin hole (101) to be machined is provided with a boss (111), and the bottom of the bearing (400) abuts against the boss (111). The side of the boring template (100) away from the end face of the wind power main shaft (10) is fixedly provided with a pressing plate (500), the pressing plate (500) is sleeved on the cutter rod (210), and the top of the bearing (400) abuts against the pressing plate (500).

2. The processing apparatus of claim 1, wherein The first sealing ring (600) is arranged between the bearing (400) and the boss (111).

3. The processing apparatus of claim 2, wherein The second sealing ring (700) is arranged between the bearing (400) and the pressing plate (500).

4. The processing apparatus of claim 3, wherein The boring template (100) comprises a fixed plate (120) and a protrusion (130) matched with the stop opening (102), the fixed plate (120) is fixedly connected with the end face of the wind power main shaft (10), and the protrusion (130) is coaxially arranged with the fixed plate (120) and is fixedly connected with the fixed plate (120).

5. The apparatus of claim 3 wherein, At least four positioning grooves (121) are arranged on the outer periphery of the fixed plate (120), the at least four positioning grooves (121) are uniformly distributed along the circumferential direction of the fixed plate (120), and the positioning grooves (121) expose the protrusion (130).

6. The apparatus of claim 4 wherein, ​ 7. The apparatus of claim 5 wherein, ​ 8. The apparatus of claim 1 wherein, ​ 9. The processing apparatus of claim 8, wherein, ​

Images