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CN-122007874-A - Wind turbine generator system nut preloading device

CN122007874ACN 122007874 ACN122007874 ACN 122007874ACN-122007874-A

Abstract

The invention discloses a wind turbine generator nut pre-tightening device, wherein a nut is arranged in a clamping cylinder, a fifth gear is connected with a fourth gear in a meshed mode, a connecting rod is fixedly connected to the bottom of the fifth gear, a sixth gear is fixedly connected to the bottom of the connecting rod, a seventh gear is fixedly connected to the sixth gear, an eighth gear is connected with the seventh gear in a meshed mode, a thread groove is fixedly connected to the eighth gear, a second threaded rod is connected with the thread groove in a threaded mode, a clamping base plate is fixedly connected to the second threaded rod, a transmission rack is connected to the sixth gear in a meshed mode, a clamping base plate is fixedly connected to the transmission rack, an oil cylinder is arranged at the lower portion of the clamping cylinder, and a clamping plate is arranged at the output end of the oil cylinder.

Inventors

  • HONG YAWEN
  • YAN YUTING
  • WANG LIANGLIANG
  • NIU KUN
  • SHI JINRUI
  • ZHU ZIJIAN
  • DAI BING
  • GUO YANTING
  • LAN HAO
  • YU BOWEN
  • LI XIAOBO
  • GU SHENGMING

Assignees

  • 华能安徽蒙城风力发电有限责任公司
  • 西安热工研究院有限公司

Dates

Publication Date
20260512
Application Date
20260309

Claims (10)

  1. 1. The utility model provides a wind turbine generator system nut preloading device, its characterized in that, including pretension shell (1), pretension shell (1) upper portion is provided with coaxial reversing mechanism, drives outer pole (15) and interior pole (9) that the bottom set up through coaxial reversing mechanism and takes place to rotate, interior pole (9) bottom fixedly connected with fourth gear (20), rotate between fourth gear (20) and the rotation casing (7) and be connected, rotation casing (7) bottom fixedly connected with clamping cylinder (6), clamping cylinder (6) inside is provided with nut (22), fourth gear (20) meshing is connected with fifth gear (21), fifth gear (21) bottom fixedly connected with connecting rod (19), connecting rod (19) bottom fixedly connected with sixth gear (25), sixth gear (25) fixedly connected with seventh gear (26), seventh gear (26) meshing is connected with eighth gear (27), eighth gear (27) fixedly connected with thread groove (28), thread groove (28) are connected with clamping cylinder (29), second gear (29) meshing is connected with tie plate (30) fixedly connected with transmission tie plate (24), the lower part of the clamping cylinder (6) is provided with an oil cylinder (11), and the output end of the oil cylinder (11) is provided with a clamping plate (23).
  2. 2. Wind turbine generator system nut pre-tightening device according to claim 1, characterized in that the clamping plate (23) is driven to move by the starting oil cylinder (11), the clamping plate (23) moves to be tightly attached to the side wall of the nut (22) so as to apply clamping force to lock the nut (22), then the coaxial reversing mechanism is started to rotate the outer rod (15) and the inner rod (9), the outer rod (15) rotates to drive the clamping cylinder (6) to rotate so as to pre-tighten, the inner rod (9) rotates to drive the fourth gear (20) to rotate, the sixth gear (25) rotates to drive the sixth gear (25) to rotate through the fourth gear (20), and the sixth gear (25) rotates to drive the transmission rack (30) and the second threaded rod (29) to synchronously move so as to drive the clamping pad (24) to clamp the side wall of the nut (22) secondarily, and the clamping force applied by the clamping pad (24) synchronously increases along with the increase of the pre-tightening process, so that dynamic locking force application is realized in the pre-tightening process.
  3. 3. Wind turbine generator system nut pre-tightening device according to claim 2, characterized in that the lower part of the connecting rod (19) is rotatably connected with a clamping shell (10), and the clamping shell (10) is fixedly connected with the clamping cylinder (6).
  4. 4. Wind turbine generator system nut pre-tightening device according to claim 2, characterized in that a limiting groove (31) is fixedly connected inside the clamping shell (10), and a transmission rack (30) is slidably connected inside the limiting groove (31).
  5. 5. The nut pre-tightening device of the wind turbine generator system according to claim 2, wherein the coaxial reversing mechanism comprises a coaxial reversing shell (4) fixedly connected to the top of the pre-tightening shell (1), a first motor (5) is arranged on the upper portion of the coaxial reversing shell (4), and a coaxial reversing assembly is arranged at the output end of the first motor (5).
  6. 6. The wind turbine generator system nut pre-tightening device according to claim 5, wherein the coaxial reversing assembly comprises a first gear (12) arranged at the output end of the first motor (5), the first gear (12) is connected with a second gear (13) in a meshed mode, the second gear (13) is connected with a third gear (14) in a meshed mode, the third gear (14) is fixedly connected with an outer rod (15), the lower portion of the outer rod (15) is fixedly connected with a telescopic mechanism, and the bottom of the telescopic mechanism is fixedly connected with a rotary shell (7).
  7. 7. Wind turbine generator system nut pre-tightening device according to claim 6, characterized in that the lower part of the first gear (12) is fixedly connected with an inner rod (9), the inner rod (9) is rotationally connected with an outer rod (15), and the inner rod (9) is rotationally connected with the rotating shell (7).
  8. 8. Wind turbine generator system nut pre-tightening device according to claim 2, characterized in that the telescopic mechanism comprises a telescopic housing (8) arranged at the lower part of the outer rod (15), a second motor (16) is arranged inside the telescopic housing (8), and a telescopic assembly is arranged at the output end of the second motor (16).
  9. 9. The wind turbine generator system nut pre-tightening device according to claim 8, wherein the telescopic assembly comprises a first threaded rod (17) arranged at the output end of the second motor (16), the first threaded rod (17) is in threaded connection with a telescopic rod (18), the telescopic rod (18) is in sliding connection with the telescopic shell (8), and a rotary shell (7) is fixedly connected to the bottom of the telescopic rod (18).
  10. 10. The nut pre-tightening device of the wind turbine generator system according to claim 2, wherein a vacuum chuck (3) is fixedly connected to the bottom of the pre-tightening shell (1), and an air pump (2) is arranged on the upper portion of the vacuum chuck (3).

Description

Wind turbine generator system nut preloading device Technical Field The invention belongs to the technical field of wind power equipment, and relates to a nut pre-tightening device of a wind turbine generator. Background The wind turbine nut pre-tightening device is one of key components for guaranteeing safe and stable operation of a wind turbine, in the installation and maintenance process of the wind turbine, the pre-tightening force of the nut directly influences the tightening degree of a connecting component and the stability of the whole structure, the device ensures that the nut reaches a pre-tightening state of a design requirement by precisely controlling the torque or the pre-tightening force applied to the nut, and effectively prevents the nut from loosening caused by factors such as vibration, fatigue and the like, so that connection failure and equipment failure are avoided. In the practical use process of the existing device, a tiny gap exists between a telescopic mechanism and a nut contact surface in a pre-tightening device capable of adjusting the clamping range, the nut is easy to rotate and loosen under a vibration environment, the loosening risk is improved, meanwhile, local pressure is easy to be too high in the clamping process of a clamping plate, and the surface of the nut is possibly damaged. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a nut pre-tightening device of a wind turbine generator, which can not damage the surface of a nut. In order to achieve the above purpose, the invention discloses a nut pre-tightening device of a wind turbine generator, which comprises a pre-tightening shell, wherein a coaxial reversing mechanism is arranged at the upper part of the pre-tightening shell, an outer rod and an inner rod arranged at the bottom are driven to rotate by the coaxial reversing mechanism, a fourth gear is fixedly connected to the bottom of the inner rod, the fourth gear is rotationally connected with a rotating shell, a clamping cylinder is fixedly connected to the bottom of the rotating shell, a nut is arranged in the clamping cylinder, a fifth gear is connected with the fourth gear in a meshed manner, a connecting rod is fixedly connected to the bottom of the fifth gear, a sixth gear is fixedly connected to the bottom of the connecting rod, a seventh gear is connected with an eighth gear in a meshed manner, a thread groove is fixedly connected with a second threaded rod, a clamping pad is fixedly connected to the bottom of the second threaded rod, a transmission rack is fixedly connected with the clamping pad, an oil cylinder is arranged at the lower part of the clamping cylinder, and a clamping plate is arranged at the output end of the oil cylinder. Further, the clamping plate is driven to move through the starting oil cylinder, the clamping plate moves to be tightly attached to the side wall of the nut, so that the clamping force is applied to lock the nut, then the coaxial reversing mechanism is started, the outer rod and the inner rod rotate, the outer rod rotates to drive the clamping cylinder to rotate, pretension is carried out, the inner rod rotates to drive the fourth gear to rotate, the sixth gear is driven to rotate through the rotation of the fourth gear, the sixth gear rotates to drive the transmission rack and the second threaded rod to synchronously move, the clamping force applied by the clamping backing plate is synchronously improved along with the increase of the pretension process, dynamic locking force application is realized in the pretension process, the number of the clamping plates is three, the number of the clamping backing plates is six, the contact surfaces of the clamping plate and the clamping backing plate and the nut are all subjected to anti-skid treatment, and the number of the fifth gear and the connecting rod are three. Further, the lower part of the connecting rod is rotationally connected with a clamping shell, the clamping shell is fixedly connected with a clamping cylinder, and a limiting plate is arranged inside the clamping cylinder. Further, the inside fixedly connected with spacing groove of centre gripping casing, the inside sliding connection of spacing groove has the drive rack. Further, the coaxial reversing mechanism comprises a coaxial reversing shell fixedly connected to the top of the pre-tightening shell, a first motor is arranged on the upper portion of the coaxial reversing shell, and a coaxial reversing assembly is arranged at the output end of the first motor. Further, the coaxial reversing assembly comprises a first gear arranged at the output end of the first motor, the first gear is connected with a second gear in a meshed mode, the second gear is connected with a third gear in a meshed mode, the third gear is fixedly connected with an outer rod, the lower portion of the outer rod is fixedly connected with a telescopic mechanism, and the bottom of the telescopic