A shaft diameter turning device for wind power main shaft machining

Abstract

The application discloses a shaft diameter turning device for wind power main shaft machining and relates to the technical field of machining. The device comprises a lathe and a first assembly installed on the lathe. The first assembly comprises a base of device subsequent components. A plurality of components are triggered under the action of gravity of the wind power main shaft through the setting of a second assembly, so that two pushers are synchronously centered and moved, and the two pushers are attached to two side curved surfaces of the wind power main shaft. Two groups of symmetrical strain gauges can respectively collect pressure values of two sides of the main shaft. If the values are consistent, it directly indicates that the center of the main shaft, the center of the main shaft chuck and the reference axis of the lathe are coaxial. If the values have differences, the offset direction and degree can be judged through the difference, clear adjustment basis is provided for the operator, the center positioning accuracy is improved, the consistency of the shaft diameter size for subsequent turning machining is laid, and manual intervention is not needed from the placement of the wind power main shaft to the completion of the center detection, the auxiliary time is greatly shortened, and the equipment utilization is improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a shaft diameter turning device for machining wind turbine main shafts. Background Technology

[0002] As the core load-bearing component of a wind turbine generator set, the machining accuracy of its shaft diameter directly affects the stability and service life of the unit. Since wind turbine shafts are usually forged from high-strength alloy steel such as 42CrMo, they are characterized by large length, heavy weight, and large range of shaft diameter dimensions. Therefore, the machining of their shaft diameter requires heavy-duty CNC machine tools.

[0003] In existing technologies, the turning of wind turbine spindles on heavy-duty CNC machine tools is mainly achieved by clamping the spindle end chuck with the tailstock center. Some extra-long spindles are further supported by a follow rest or center rest. However, in actual machining processes, existing machining methods have insurmountable technical defects for such extra-large and extra-heavy workpieces: First, the paradox of static correction of dynamic eccentricity. When the wind turbine spindle is hoisted and placed, the elastic deformation caused by its own weight is coupled with the heavy-load deformation of the machine tool support surface, resulting in a "dynamic offset" characteristic of the spindle centerline. Existing devices rely on manual static correction using dial indicators, which is not only time-consuming for each correction, but the correction result only reflects the spindle center position at a certain static instant, and cannot match the dynamic offset after the spindle is subjected to changes in force during machining. The initial clamping eccentricity often exceeds the critical value of 0.05mm, directly causing the coaxiality of the shaft diameter machining to exceed the tolerance.

[0004] Secondly, there is the challenge of monitoring blind spots in the machining process. When the wind turbine spindle rotates at high speed, centrifugal force, cutting force, and self-repetitive action induce periodic vibrations, creating a "resonance amplification effect" in the cantilever area far from the clamping end, where the accumulated eccentricity can reach over 0.1 mm. Existing detection systems can only monitor the tool position or spindle speed, lacking effective means to perceive the real-time eccentricity of the workpiece itself: visual sensors are easily obscured by cutting fluid and metal chips, while contact probes pose a risk of collision. This results in problems such as excessive ellipticity and deterioration of surface roughness during machining not being detected in time, and in extreme cases, tool breakage due to uncontrolled vibration can be excessive.

[0005] Third, the traditional buffering and control methods fail to adapt. In existing technologies, the buffering of the spindle placement relies on springs or hydraulic devices, but their rigidity coefficient is fixed and cannot adapt to the impact characteristics of spindles of different weights; vibration suppression during machining relies on mechanical damping, but the response speed lags behind the frequency of dynamic eccentricity changes, leading to control failure.

[0006] Therefore, a shaft diameter turning device for wind turbine main shaft machining is proposed to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a shaft diameter turning device for wind turbine main shaft machining, thereby solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a shaft diameter turning device for wind turbine main shaft machining, comprising: a lathe and a first component mounted thereon, the first component comprising: a base for subsequent components of the device, wherein positioning shafts A are fixedly connected to both sides of the symmetrical axis on the base, and connecting rods A are rotatably connected to both ends of the two sets of positioning shafts A, and a lower base is fixedly connected to the middle of the upper surface of the base.

[0009] The first component also includes: a sleeve body that is slidably fitted onto the outer ring of the lower base at the end away from the base, the sleeve body having through grooves on both sides, the sleeve body being composed of a rectangular sleeve tube and an orifice frame, an auxiliary body being slidably connected in the through grooves on both sides of the sleeve body, the auxiliary body having a cavity, a positioning shell being slidably fitted onto the end of the auxiliary body away from the center of the sleeve body, the positioning shell being fixedly connected to the sleeve body, and a magnetorheological fluid being installed inside the positioning shell.

[0010] The second component is used to support the wind turbine's main shaft and provide feedback on its center.

[0011] Preferably, the lathe has a central support in the middle and a spindle chuck at one end for positioning the wind turbine main shaft. The central support is located below the middle of the wind turbine main shaft for support.

[0012] Preferably, an inlet valve is provided on the side of the auxiliary body away from the center of the sleeve body, and an outlet valve is provided on the surface of the auxiliary body below the inlet valve. Both the inlet valve and the outlet valve are connected to the inner cavity of the auxiliary body. An auxiliary spring is fixedly connected to the middle of the side of the auxiliary body near the positioning shell, and the other end of the auxiliary spring is fixedly connected to the inner cavity of the positioning shell.

[0013] Preferably, the ends of the two sets of connecting rods A away from the positioning shaft A are rotatably connected to both sides of the auxiliary body, and connecting rods B are rotatably connected to both sides of the auxiliary body. A receiving seat is slidably connected to the upper part of the middle of the sleeve body. The lower base and the receiving seat are both slidably connected to the rectangular sleeve tube of the sleeve body. The two sides of the receiving seat near the sleeve body are fixedly connected to the positioning shaft B. The end of the connecting rod B away from the auxiliary body is rotatably connected to the positioning shaft B. A pressure sensor is fixedly connected to the inner wall of the sleeve body.

[0014] Preferably, the rectangular sleeve of the socket body is filled with compressed air, and the air pressure sensor is electrically connected to an external controller.

[0015] Preferably, the second component includes: an inner cavity formed inside the receiving seat, wherein a cylindrical groove is formed in the middle of the side of the receiving seat away from the sleeve body, a support shaft is slidably connected in the cylindrical groove, a return spring is fixedly connected to the bottom of the support shaft, and the end of the return spring away from the support shaft is fixedly connected to the bottom of the inner cavity.

[0016] Preferably, the supporting shaft consists of a sliding column and an arc-shaped supporting platform.

[0017] Preferably, both sides of the sliding support shaft are rotatably connected to a connecting rod assembly, and both sides of the receiving seat are fixedly connected to a transition block. The end of the connecting rod assembly away from the support shaft is rotatably connected to a pusher body. Both sides of the upper surface of the receiving seat are provided with trapezoidal grooves, and the pusher body is slidably connected in the trapezoidal groove. The two sets of pushers are respectively located on both sides of the support shaft, and the side of the pusher body closest to the support shaft is fixedly connected to a strain gauge.

[0018] Preferably, the linkage assembly consists of an L-shaped linkage and short rods rotatably connected to both ends of the L-shaped linkage. The L-shaped linkage in the linkage assembly is rotatably connected to the adapter block, and the strain gauge is electrically connected to an external controller.

[0019] Compared with existing technologies, this invention provides a shaft diameter turning device for wind turbine main shaft machining, which has the following beneficial effects: 1. By setting up the second component, the wind turbine main shaft itself is used to trigger the support shaft to move downward, driving the connecting rod group to push the two pushing bodies to move synchronously to center, so that the strain gauges are in contact with the arc surface of the main shaft. The pressure values ​​collected by the two sets of strain gauges can directly determine whether the center of the main shaft is coaxial with the lathe reference axis. The numerical difference can clearly indicate the direction and degree of offset. Center detection can be completed without manual intervention, solving the efficiency and accuracy problems of existing technologies that rely on manual correction. This mechanical linkage design driven by gravity realizes the automated process of "placement and detection", which greatly shortens the auxiliary time and improves the equipment utilization rate. It is a substantial improvement over the traditional positioning method. Compared with the existing technology where manual static correction cannot adapt to the dynamic eccentricity of the wind turbine main shaft caused by its own weight and support deformation, this implementation scheme greatly shortens the single center positioning time, improves the equipment utilization rate, and adapts to the elastic deformation characteristics of the main shaft through dynamic pressure monitoring, improving the positioning accuracy and providing a core guarantee for the coaxiality of shaft diameter machining.

[0020] 2. Through the arrangement of the first set of components, in conjunction with the second component, when the wind turbine main shaft is placed on the support shaft, its gravity is sequentially transmitted to the receiving seat, sleeve body, and other components, forming a continuous force transmission chain. This design, which uses gravity as a natural driving force, differs from existing technologies that use springs or hydraulic buffer devices with fixed rigidity coefficients, which cannot adapt to the impact characteristics of main shafts of different weights. It can complete the initial position adaptation without an additional power source, simplifying the power system structure of the device and reducing energy consumption and failure risks. Furthermore, the gas compression process during the movement of the receiving seat into the sleeve body buffers the impact force when the main shaft is placed, preventing damage to the main shaft surface or deformation of device components caused by rigid contact. Simultaneously, the vertical downward movement of the positioning shaft B causes the connecting rod B to deflect, thereby pushing the auxiliary body to slide into the positioning shell, reserving space for the subsequent intervention of the magnetorheological fluid. This achieves pre-linkage between the mechanical structure and intelligent control elements, laying the foundation for the stability of the processing process.

[0021] 3. After the turning operation begins, the air pressure sensor monitors the internal air pressure of the sleeve in real time to sense the machining status. Since the internal air pressure of the sleeve is directly related to the height of the bearing seat, and the height of the bearing seat depends on the axial stability of the wind turbine spindle, even small changes in air pressure can promptly reflect whether the spindle is eccentric or vibrating. In existing technologies, visual sensors are easily affected by the cutting environment, and contact probes pose a risk of collision, making it impossible to capture the resonance amplification effect in the cantilever area in real time. The air pressure monitoring in this setup has the advantages of fast response speed and is not affected by cutting fluid or iron filings. It can continuously provide stable status feedback during the machining process, ensuring that the operator or main controller can promptly grasp the spindle dynamics and provide data support for precision control.

[0022] 4. When the air pressure sensor detects an abnormal air pressure, it indicates a change in the spindle axis. The main controller then controls the change in the magnetic force of the electromagnetic coil inside the positioning housing, causing the magnetorheological fluid to solidify rapidly, thereby fixing the height of the receiving seat. This achieves a rapid closed-loop response from monitoring to intervention, with advantages in three aspects: First, the solidification and softening of the magnetorheological fluid can be precisely controlled by electromagnetic signals, with a short response time, allowing for fixation in the early stages of spindle eccentricity and minimizing accuracy deviations. Second, the solidified magnetorheological fluid forms a rigid support, providing stable positioning constraints for the receiving seat and preventing further positional changes due to spindle vibration, effectively curbing further expansion of eccentricity. Third, the controllability of the magnetorheological fluid makes the fixing process reversible; after the abnormality is eliminated, its fluidity can be restored by reducing the magnetic force, without affecting subsequent processing operations, thus balancing emergency handling and processing continuity.

[0023] 5. The elastic potential energy stored in the auxiliary spring during the movement of the auxiliary body not only assists in the reset of each component after the spindle is removed, but also provides elastic support for the auxiliary body during machining, offsetting some of the impact force from cutting vibration and enhancing the device's anti-interference capability. The cooperation between the inlet and outlet valves allows for flexible control of the magnetorheological fluid flow rate between the positioning shell and the auxiliary body's internal cavity, facilitating adjustment of the magnetorheological fluid filling amount according to spindle specifications or machining conditions, and optimizing the curing effect. Furthermore, the rotational connection between connecting rod A and positioning shaft A ensures the smooth movement of the entire sleeve body during downward movement, preventing structural jamming from affecting the accuracy of air pressure monitoring. The synergistic effect of multiple components significantly improves the overall reliability of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a left-side view of the overall structure of the present invention.

[0026] Figure 3 This is a partial structural diagram of the present invention.

[0027] Figure 4 This is a structural diagram of the first and second components of the present invention.

[0028] Figure 5 This is a partial cross-sectional view of the present invention.

[0029] Figure 6 This is a partial structural diagram of the first component of the present invention.

[0030] Figure 7 This is an internal structural diagram of the second component of the present invention.

[0031] Figure 8 This is a front view structural diagram of the second component of the present invention.

[0032] Figure 9 This is a disassembled structural diagram of the second component of the present invention.

[0033] In the diagram: 11. Lathe; 12. Center rest; 13. Spindle chuck.

[0034] First component: 21. Base; 22. Positioning shaft A; 23. Connecting rod A; 24. Lower base; 25. Sleeve body; 26. Auxiliary body; 27. Positioning shell; 28. Inlet valve; 29. ​​Outlet valve; 210. Auxiliary spring; 211. Connecting rod B; 212. Positioning shaft B; 213. Receiver; 214. Pressure sensor.

[0035] Second component: 31. Inner chamber; 32. Cylindrical groove; 33. Return spring; 34. Support shaft; 35. Connecting rod assembly; 36. Adapter block; 37. Pushing body; 38. Strain gauge; 39. Trapezoidal groove. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0038] Example: Please refer to Figures 1 to 6 As shown: In order to solve the problems mentioned in the technical solution, this application provides a shaft diameter turning device for wind turbine main shaft processing, including: a lathe 11 and a first component mounted thereon. The first component includes: a base 21 for subsequent components of the device. Positioning shafts A22 are fixedly connected to both sides of the symmetrical axis on the base 21. Connecting rods A23 are rotatably connected to both ends of the two sets of positioning shafts A22. A lower base 24 is fixedly connected to the middle of the upper surface of the base 21.

[0039] The first component also includes: a sleeve body 25 that is slidably sleeved on the outer ring of the lower base 24 at the end away from the base 21. Both sides of the sleeve body 25 are provided with through grooves. The sleeve body 25 is composed of a rectangular sleeve tube and a mouth-shaped frame. An auxiliary body 26 is slidably connected in the through grooves on both sides of the sleeve body 25. A cavity is provided in the auxiliary body 26. A positioning shell 27 is slidably sleeved on the outer side of the auxiliary body 26 away from the center of the sleeve body 25. The positioning shell 27 is fixedly connected to the sleeve body 25. A magnetorheological fluid is installed in the positioning shell 27.

[0040] The second component is used to support the wind turbine's main shaft and provide feedback on its center.

[0041] A center frame 12 is provided in the middle of the lathe 11, and a spindle chuck 13 is provided at one end of the lathe 11 for positioning the wind turbine main shaft. The center frame 12 is located below the middle of the wind turbine main shaft for support.

[0042] An inlet valve 28 is provided on the side of the auxiliary body 26 away from the center of the sleeve body 25. An outlet valve 29 is provided on the surface of the auxiliary body 26 below the inlet valve 28. Both the inlet valve 28 and the outlet valve 29 are connected to the inner cavity of the auxiliary body 26. An auxiliary spring 210 is fixedly connected to the middle of the side of the auxiliary body 26 near the positioning shell 27. The other end of the auxiliary spring 210 is fixedly connected to the inner cavity of the positioning shell 27.

[0043] Two sets of connecting rods A23 are rotatably connected to the two sides of the auxiliary body 26 at the ends away from the positioning shaft A22. Connecting rods B211 are rotatably connected to both sides of the auxiliary body 26. A receiving seat 213 is slidably connected to the upper part of the middle of the sleeve body 25. The lower base 24 and the receiving seat 213 are both slidably connected to the rectangular sleeve tube of the sleeve body 25. The two sides of the receiving seat 213 near the sleeve body 25 are fixedly connected to the positioning shaft B212. The end of the connecting rod B211 away from the auxiliary body 26 is rotatably connected to the positioning shaft B212. A pressure sensor 214 is fixedly connected to the inner wall of the sleeve body 25.

[0044] The rectangular sleeve of the socket 25 is filled with compressed air, and the air pressure sensor 214 is electrically connected to an external controller.

[0045] A further embodiment: Please refer to Figures 7 to 9 As shown: The second component includes: an inner cavity 31 opened inside the receiving seat 213, a cylindrical groove 32 is opened in the middle of the side of the receiving seat 213 away from the sleeve body 25, a support shaft 34 is slidably connected in the cylindrical groove 32, a return spring 33 is fixedly connected to the bottom of the support shaft 34, and the end of the return spring 33 away from the support shaft 34 is fixedly connected to the bottom of the inner cavity 31.

[0046] The supporting shaft 34 consists of a sliding column and an arc-shaped supporting platform.

[0047] Both sides of the sliding support shaft 34 are rotatably connected to the connecting rod assembly 35. Both sides of the receiving seat 213 are fixedly connected to the adapter block 36. The end of the connecting rod assembly 35 away from the support shaft 34 is rotatably connected to the pusher body 37. Both sides of the upper surface of the receiving seat 213 are provided with trapezoidal grooves 39. The pusher body 37 is slidably connected in the trapezoidal groove 39. The two sets of pushers 37 are located on both sides of the support shaft 34. The side of the pusher body 37 closest to the support shaft 34 is fixedly connected to the strain gauge 38.

[0048] The linkage assembly 35 consists of an L-shaped linkage and short rods rotatably connected to both ends of the L-shaped linkage. The L-shaped linkage in the linkage assembly 35 is rotatably connected to the adapter block 36, and the strain gauge 38 is electrically connected to the external controller.

[0049] Among them, the support shaft 34 is used to support the wind turbine main shaft to be machined.

[0050] The return spring 33 is used to assist in the return of the support shaft 34.

[0051] The positioning housing 27 contains an electromagnetic coil that is electrically connected to an external controller.

[0052] The inlet valve 28 and the outlet valve 29 are used together to facilitate the flow of magnetorheological fluid inside the positioning housing 27.

[0053] The pressure sensor 214 is used to provide feedback on changes in air pressure inside the socket 25.

[0054] The working principle of all the contents in the above embodiments is as follows: The working process of the second component is as follows: In use, the wind turbine main shaft is transported to the lathe 11 by an external lifting device and placed there. One end is clamped by the main shaft chuck 13, the middle is placed on the center frame 12, and its tail end is placed on the support shaft 34. Under its own weight, it presses the support shaft 34 to move downward. Based on the vertical downward movement of the support shaft 34, one end of the short rod connected to the support shaft 34 in the connecting rod group 35 connected to its outer wall pushes the L-shaped rod down. Since the middle of the L-shaped rod is rotatably connected to the adapter block 36, when one end of the L-shaped rod is pressed down, the other end deflects towards the middle of the support shaft 34. The rotation pushes another short rod towards the center of the support shaft 34, thereby pushing the pusher 37 closer to the wind turbine main shaft placed on the support shaft 34. The pusher 37, together with the strain gauges 38 on its surface, comes into contact with the surface of the wind turbine main shaft. Under the pressure of the strain gauges 38 against the surface of the wind turbine main shaft, the value of the strain gauges 38 changes. When the support shaft 34 moves to the bottom, the strain gauges 38 and the surface of the wind turbine main shaft are in contact with the final value. Through the feedback of the values ​​of the two sets of strain gauges 38, if the pressure values ​​are consistent, the center of the surface wind turbine main shaft is consistent with the center of the main shaft chuck 13 and is in the center position of the lathe 11. If they are inconsistent, it indicates that the center is offset and the pressure values ​​on both sides are different, prompting the operator to make adjustments.

[0055] By setting up the second component, multiple parts are triggered under the gravity of the wind turbine main shaft, thereby causing the two pushers 37 to move synchronously and align with the arc surfaces on both sides of the wind turbine main shaft. The two sets of symmetrically arranged strain gauges 38 can collect the pressure values ​​on both sides of the main shaft. If the values ​​are consistent, it directly indicates that the center of the main shaft is coaxial with the center of the main shaft chuck 13 and the reference axis of the lathe 11. If there is a difference in the values, the direction and degree of offset can be judged by the difference, providing the operator with a clear basis for adjustment, improving the center positioning accuracy, laying the foundation for the consistency of the shaft diameter size in subsequent turning machining, and no manual intervention is required from the placement of the wind turbine main shaft to the completion of the center inspection, which greatly shortens the auxiliary time and improves the equipment utilization rate.

[0056] Please refer to the above work process. Figures 7 to 9 .

[0057] The following is the working process of the first component: During use, when the support shaft 34 is pressed down to the bottom of the support seat 213 under the gravity of the wind turbine main shaft, the support seat 213 is pushed down under the transmission of force. When the support seat 213 is pressed down, it moves into the interior of the rectangular sleeve of the sleeve body 25, compressing the gas inside the sleeve body 25. The downward movement of the support seat 213 simultaneously changes the vertical position of the positioning shaft B212, causing it to move downward in the vertical direction, pushing one end of the connecting rod B211 rotated on it. The other end of the connecting rod B211 pushes the connected auxiliary body 26 to slide to both sides of the sleeve body 25. The auxiliary body 26 is squeezed into the positioning shell 27. With the assistance of the liquid inlet valve 28, the magnetorheological fluid in the positioning shell 27 flows into the cavity of the auxiliary body 26. The auxiliary spring 210 is compressed to store elastic potential energy. The movement of the auxiliary body 26 indirectly causes it to connect with the connecting rod A2 When one end of the connection 3 deflects, the end of the connecting rod A23 connected to the positioning shaft A22 rotates synchronously, the entire sleeve 25 moves downward, and the bottom end of the support seat 213 and the top end of the lower base 24 are simultaneously squeezed into the rectangular sleeve of the sleeve 25, compressing the air inside. After the wind turbine main shaft is placed, when the air pressure inside the sleeve 25 is stable, the turning work begins. During the turning process, the air pressure sensor 214 provides real-time feedback on the air pressure inside the sleeve 25. If the air pressure inside the sleeve 25 changes, it indicates that the axis of the wind turbine main shaft has changed during the turning process, and its turning accuracy is affected. The signal is transmitted to the main controller, which controls the change of the magnetic force value of the electromagnetic coil in the positioning shell 27, and the magnetorheological fluid in the positioning shell 27 is solidified to fix the height of the support seat 213 and prevent the height position of the support seat 213 from changing further, so as to fix and support the wind turbine main shaft.

[0058] With the first component in place and in conjunction with the second component, when the wind turbine main shaft is placed on the support shaft 34, its gravity is sequentially transmitted to components such as the support seat 213 and the sleeve body 25, forming a continuous force transmission chain. This design, which uses gravity as a natural driving force, differs from existing technologies where springs or hydraulic buffer devices with fixed rigidity coefficients cannot adapt to the impact characteristics of main shafts of different weights. It can complete the initial position adaptation without an additional power source, simplifying the power system structure of the device and reducing energy consumption and failure risks. On the other hand, the gas compression process during the movement of the support seat 213 into the sleeve body 25 can buffer the impact force when the main shaft is placed, avoiding damage to the main shaft surface or deformation of device components caused by rigid contact. At the same time, the vertical downward movement of the positioning shaft B212 causes the connecting rod B211 to deflect, thereby pushing the auxiliary body 26 to slide into the positioning shell 27, reserving space for the subsequent intervention of magnetorheological fluid, realizing the pre-linkage between the mechanical structure and intelligent control elements, and laying the foundation for the stability of the processing process.

[0059] By using the second component, the wind turbine main shaft's own gravity triggers the support shaft to move downwards, driving the connecting rod assembly to push the two pushing bodies to move synchronously towards the center, ensuring the strain gauges fit against the main shaft's curved surface. The pressure values ​​collected by the two sets of strain gauges can directly determine whether the main shaft center is coaxial with the lathe's reference axis. The numerical difference can clearly indicate the direction and degree of offset, completing the center detection without manual intervention, thus solving the efficiency and accuracy problems of existing technologies that rely on manual correction. This gravity-driven mechanical linkage design achieves an automated "placement and detection" process, significantly shortening auxiliary time and improving equipment utilization. It represents a substantial improvement over traditional positioning methods. Compared to existing technologies where manual static correction cannot adapt to the dynamic eccentricity of the wind turbine main shaft caused by its own weight and support deformation, this implementation scheme significantly shortens the single center positioning time, improves equipment utilization, and adapts to the elastic deformation characteristics of the main shaft through dynamic pressure monitoring, improving positioning accuracy and providing a core guarantee for the coaxiality of shaft diameter machining.

[0060] After the turning operation begins, the air pressure sensor 214 monitors the internal air pressure of the sleeve 25 in real time to sense the machining status. Since the internal air pressure of the sleeve 25 is directly related to the height of the support 213, and the height of the support 213 depends on the axial stability of the wind turbine spindle, even small changes in air pressure can promptly reflect whether the spindle is eccentric or vibrating. In the prior art, visual sensors are easily affected by the cutting environment, and contact probes pose a risk of collision, making it impossible to capture the resonance amplification effect in the cantilever area in real time. The air pressure monitoring in this setup has the advantages of fast response speed and is not affected by cutting fluid or iron filings. It can continuously provide stable status feedback during the machining process, ensuring that the operator or main controller can promptly grasp the spindle dynamics and provide data support for precision control.

[0061] When the air pressure sensor 214 detects an abnormal air pressure, it indicates a change in the spindle axis. The main controller then controls the change in the magnetic force of the electromagnetic coil inside the positioning housing 27, causing the magnetorheological fluid to solidify rapidly, thereby fixing the height of the receiving seat 213. This achieves a rapid closed-loop response from monitoring to intervention, with advantages in three aspects: First, the solidification and softening of the magnetorheological fluid can be precisely controlled by electromagnetic signals, with a short response time, allowing for fixation in the early stages of spindle eccentricity and minimizing accuracy deviations. Second, the solidified magnetorheological fluid forms a rigid support, providing stable positioning constraints for the receiving seat 213 and preventing further positional changes due to spindle vibration, effectively curbing further expansion of eccentricity. Third, the controllability of the magnetorheological fluid makes the fixing process reversible; after the abnormality is eliminated, its fluidity can be restored by reducing the magnetic force, without affecting subsequent processing operations, thus balancing emergency handling and processing continuity.

[0062] The auxiliary spring 210 stores elastic potential energy during the movement of the auxiliary body 26. This not only assists in the reset of all components after the spindle is removed, but also provides elastic support for the auxiliary body 26 during machining, offsetting some of the impact force from cutting vibration and enhancing the device's anti-interference capability. The cooperation between the inlet valve 28 and the outlet valve 29 allows for flexible control of the magnetorheological fluid flow rate between the positioning shell 27 and the inner cavity of the auxiliary body 26. This facilitates adjustment of the magnetorheological fluid filling amount according to the spindle specifications or machining conditions, optimizing the curing effect. Furthermore, the rotatable connection between the connecting rod A23 and the positioning shaft A22 ensures the smooth movement of the sleeve 25 during its overall downward movement, preventing structural jamming from affecting the accuracy of air pressure monitoring. The synergistic effect of multiple components significantly improves the overall reliability of the device.

[0063] Please refer to the above work process. Figures 1 to 6 .

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shaft diameter turning device for windmill main shaft machining, comprising: The lathe (11) and the first assembly installed thereon are characterized in that the first assembly comprises: a base (21) for subsequent parts of the device, the base (21) is fixedly connected with positioning shafts A (22) on both sides of the symmetry axis, both ends of the two positioning shafts A (22) are rotatably connected with connecting rods A (23), and the upper surface of the base (21) is fixedly connected with a lower base (24); the first assembly further comprises: a sleeving body (25) slidably sleeved on the outer circle of the lower base (24) away from the base (21), both sides of the sleeving body (25) are provided with through grooves, the sleeving body (25) is composed of a rectangular sleeving pipe and a mouth-shaped frame, auxiliary bodies (26) are slidably connected in the through grooves on both sides of the sleeving body (25), a cavity is formed in the auxiliary body (26), a positioning shell (27) is slidably sleeved on the end of the auxiliary body (26) away from the center of the sleeving body (25), the positioning shell (27) is fixedly connected with the sleeving body (25), and the positioning shell (27) is provided with a magnetorheological fluid; one end of each of the two connecting rods A (23) away from the positioning shaft A (22) is rotatably connected to the auxiliary body (26) on the side, connecting rods B (211) are rotatably connected to the auxiliary body (26) on both sides, a receiving seat (213) is slidably connected to the upper end of the middle part of the sleeving body (25), the lower base (24) and the receiving seat (213) are slidably connected in the rectangular sleeving pipe of the sleeving body (25), positioning shafts B (212) are fixedly connected to the side of the receiving seat (213) close to the sleeving body (25), one end of each of the connecting rods B (211) away from the auxiliary body (26) is rotatably connected to the positioning shaft B (212), and an air pressure sensor (214) is fixedly connected to the inner wall of the sleeving body (25); the second assembly is used for supporting a wind power main shaft and detecting the center thereof; the second assembly comprises: a supporting shaft (34), the sliding sides of the supporting shaft (34) are rotatably connected with connecting rod groups (35), the sides of the receiving seat (213) are fixedly connected with adapter blocks (36), one end of each of the connecting rod groups (35) away from the supporting shaft (34) is rotatably connected with a pushing body (37), the upper surfaces of the receiving seat (213) are provided with trapezoidal grooves (39), the pushing bodies (37) are slidably connected in the trapezoidal grooves (39), and the two pushing bodies (37) are located on the two sides of the supporting shaft (34).

2. The shaft diameter turning device for processing a wind power main shaft according to claim 1, characterized in that: The center frame (12) is arranged in the middle of the lathe (11), the lathe (11) is provided with a main shaft chuck (13) at one end for positioning the wind power main shaft, and the center frame (12) is arranged below the middle of the wind power main shaft for supporting.

3. The shaft diameter turning device for processing a wind power main shaft according to claim 1, characterized in that: The auxiliary body (26) is provided with a liquid inlet valve (28) above the side away from the center of the sleeve body (25), the side of the auxiliary body (26) below the liquid inlet valve (28) is provided with a liquid outlet valve (29), the liquid inlet valve (28) and the liquid outlet valve (29) are communicated with the inner cavity of the auxiliary body (26), the middle of the side of the auxiliary body (26) close to the positioning shell (27) is fixedly connected with an auxiliary spring (210), and the other end of the auxiliary spring (210) is fixedly connected with the inner cavity of the positioning shell (27).

4. The shaft diameter turning device for processing a wind power main shaft according to claim 1, characterized in that: The rectangular sleeve pipe of the sleeve body (25) is filled with compressed air, and the air pressure sensor (214) is electrically connected with an external controller.

5. The shaft diameter turning device for processing a wind power main shaft according to claim 1, characterized in that: The second assembly comprises an inner chamber (31) opened in the inner part of the receiving seat (213), a cylindrical groove (32) is opened in the middle of the side of the receiving seat (213) away from the sleeve body (25), a supporting shaft (34) is slidably connected in the cylindrical groove (32), a reset spring (33) is fixedly connected to the bottom of the supporting shaft (34), and one end of the reset spring (33) away from the supporting shaft (34) is fixedly connected to the bottom of the inner chamber (31).

6. The shaft diameter turning device for processing a wind power main shaft according to claim 5, characterized in that: The supporting shaft (34) is composed of a sliding column and an arc-shaped supporting table.

7. The shaft diameter turning device for processing a wind power main shaft according to claim 1, characterized in that: The connecting rod group (35) is composed of an L-shaped connecting rod and a short rod rotatably connected to the two ends of the L-shaped connecting rod, the L-shaped connecting rod in the connecting rod group (35) is rotatably connected to the adapter block (36), and the strain sheet (38) is electrically connected with an external controller.

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