CN-122008135-A - Screw bolt fastening device for variable pitch or yaw bearing of wind driven generator

CN122008135ACN 122008135 ACN122008135 ACN 122008135ACN-122008135-A

Abstract

The invention discloses a screw bolt fastening device for a variable pitch or yaw bearing of a wind driven generator, which relates to the technical field of wind driven generator assembly and comprises a frame, a variable pitch bearing, a fastening platform, a rotary assembly and a fastening assembly, wherein the fastening platform and the frame are rotatably connected through the variable pitch bearing, the rotary assembly comprises a rotary driving device and a gear, the gear is meshed with an inner gear ring of the variable pitch bearing, the gear can be driven to rotate through the rotary driving device so as to drive the fastening platform to rotate, the fastening assembly comprises a plurality of fastening mechanisms which are uniformly distributed in circumference, each fastening mechanism comprises a variable diameter device and a fastening device, each variable diameter device comprises a screw rod and a sliding seat, each fastening device comprises an air cylinder and an intelligent servo tightening machine, the radial position of each intelligent servo tightening machine can be adjusted through the variable diameter device, the bolts can be tightened through the intelligent servo tightening machine and achieve accurate pre-tightening force, and the screw fastening device can provide axial compression for the process of tightening the bolts through the air cylinders, and the screw fastening device can realize automatic fastening of variable pitch or yaw bearing bolts of different types.

Inventors

LI ZONGXUE
WANG LEI
ZHANG HAO
SUN WANLI
LI ZHEYUAN

Assignees

内蒙古工业大学

Dates

Publication Date: 20260512
Application Date: 20251231

Claims (9)

1. The screw bolt fastening device for the pitch or yaw bearing of the wind driven generator is characterized by comprising a frame, a pitch bearing, a fastening platform, a rotating assembly and a fastening assembly; The variable-pitch bearing comprises an outer ring and an inner ring, the outer ring is fixedly connected with the rack, the inner ring is fixedly connected with the fastening platform, the inner ring is rotatably arranged in the outer ring, and an inner gear ring is arranged on the inner side of the inner ring; The rotary assembly comprises a rotary driving device and a gear, the rotary driving device is fixedly connected with the rack, the gear is rotatably connected with the rack, the rotary driving device is used for driving the gear to rotate, and the gear is meshed with the annular gear; The fastening component comprises a plurality of fastening mechanisms which are uniformly distributed on the circumference, the fastening mechanisms comprise a reducing device and a fastening device, The reducing device comprises a screw rod and a sliding seat, the screw rod is arranged along the radial direction of the variable pitch bearing, the screw rod is rotatably connected with the fastening platform, the sliding seat is in sliding connection with the fastening platform, the screw rod is in threaded connection with the sliding seat, The fastening device comprises an air cylinder and an intelligent servo tightening machine, wherein the axis of an output shaft of the intelligent servo tightening machine is parallel to the axis of the pitch bearing, the intelligent servo tightening machine is connected with the sliding seat in a sliding manner, the air cylinder is fixedly arranged on the sliding seat, and the air cylinder is used for driving the intelligent servo tightening machine to slide along the axial direction of the output shaft.
2. The wind turbine pitch or yaw bearing bolt fastening device of claim 1, wherein the fastening assembly further comprises a variable diameter drive device for driving a plurality of the lead screws to rotate.
3. The wind driven generator pitch or yaw bearing bolt fastening device according to claim 2, wherein the variable diameter driving device comprises a variable diameter motor and a commutator, the variable diameter motor is fixedly connected with the frame, the commutator is fixedly installed on the fastening platform, the input end of the commutator is coaxial with the pitch bearing, a clutch is connected to the output shaft of the variable diameter motor, the other end of the clutch is fixedly connected with the input end of the commutator, the commutator comprises a plurality of output ends, and the plurality of output ends are respectively fixedly connected with one ends of a plurality of screw rods.
4. A wind turbine pitch or yaw bearing bolt fastening device according to claim 3, wherein the fastening devices are four, and the commutator is a five-axis commutator.
5. The wind driven generator pitch or yaw bearing bolt fastening device according to claim 1, wherein the rotary driving device comprises a rotary motor and a speed reducer, the rotary motor and the speed reducer are fixedly installed on the frame, an output shaft of the rotary motor is fixedly connected with an input shaft of the speed reducer, and the gear is fixedly sleeved on an output shaft of the speed reducer.
6. The wind turbine pitch or yaw bearing bolt fastening device of claim 1, further comprising a slide plate, wherein the intelligent servo tightening machine is fixedly mounted on the slide plate, the slide plate is in sliding connection with the slide carriage, and the telescopic end of the cylinder is fixedly connected with the slide plate.
7. The wind turbine pitch or yaw bearing bolt fastening device of claim 1, wherein the fastening mechanism further comprises a rail fixedly mounted on the fastening platform, the slide is slidably fitted with the rail, and a rail clamp is provided between the slide and the rail.
8. A wind turbine pitch or yaw bearing bolt fastening device according to any one of claims 1 to 7, further comprising a lifting assembly for driving the frame up and down.
9. The wind turbine pitch or yaw bearing bolt fastening device of claim 8, wherein the lifting assembly is a scissor lift table, and the frame is fixedly mounted on a table top of the scissor lift table.

Description

Screw bolt fastening device for variable pitch or yaw bearing of wind driven generator Technical Field The invention relates to the technical field of wind driven generator assembly, in particular to a bolt fastening device for a pitch or yaw bearing of a wind driven generator. Background In the wind generating set, a pitch mechanism is a device for dynamically adjusting the pitch angle of wind turbine blades, a hub and blades in the pitch mechanism are connected through a pitch bearing to realize rotation, a yaw mechanism is a device for dynamically adjusting the rotation angle of a wind turbine shaft, and the top end of a tower in the yaw mechanism is connected with a cabin through a yaw bearing to realize rotation. Because the large-scale wind turbine generator is huge in size and is usually assembled on site, when the wind turbine generator component is prefabricated in a factory, a variable pitch bearing is required to be assembled on a hub in advance according to a process specification, a yaw bearing is required to be assembled on the top end of the uppermost section of a tower, and the outer ring of the variable pitch bearing is connected with the hub in a flange connection mode, and the outer ring of the yaw bearing is connected with the top section of the tower in a flange connection mode. In the step of prefabricating and assembling the bearing, the traditional assembly process is to fasten the screw by a manual holding pre-tightening device, and because the wind generating set is large in size and numerous in connecting bolts, the manual assembly mode is extremely time-consuming and labor-consuming, the assembly efficiency is low and the manual error in the aspect of pre-tightening force control is large. In order to improve the assembly efficiency of the pitch bearing, the prior art also develops tooling equipment such as a generator pitch mechanism bolt multipoint synchronous fastening machine (application number CN 202020983553.4), a wind driven generator pitch mechanism bolt fastening semi-automatic tooling (application number 202510628104.5) and the like, but the equipment is fixed by rooting depending on the structure of a hub, is difficult to be suitable for the assembly of the yaw bearing, and is fixed on the hub in a structure similar to an inner clamping claw when in use, in practice, the generator pitch mechanism bolt multipoint synchronous fastening machine has the defect of unstable clamping, and the wind driven generator pitch mechanism bolt fastening semi-automatic tooling is difficult to ensure stable clamping when used for wind power hubs of different specifications, and in addition, the equipment belongs to the semi-automatic equipment, and cannot fully automatically finish the fastening work of all bolts. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a device for fastening a pitch or yaw bearing bolt of a wind driven generator, which can realize full-automatic fastening of pitch or yaw bearing bolts of different types. The aim of the invention is realized by the following technical scheme: the bolt fastening device for the pitch or yaw bearing of the wind driven generator comprises a frame, a pitch bearing, a fastening platform, a rotary assembly and a fastening assembly; The variable-pitch bearing comprises an outer ring and an inner ring, the outer ring is fixedly connected with the rack, the inner ring is fixedly connected with the fastening platform, the inner ring is rotatably arranged in the outer ring, and an inner gear ring is arranged on the inner side of the inner ring; The rotary assembly comprises a rotary driving device and a gear, the rotary driving device is fixedly connected with the rack, the gear is rotatably connected with the rack, the rotary driving device is used for driving the gear to rotate, and the gear is meshed with the annular gear; The utility model provides a screw machine, including the screw machine, the screw machine is used for fixing the screw machine, the fastening assembly is including a plurality of fastening mechanism that are circumference equipartition, fastening mechanism includes reducing device and fastener, reducing device includes lead screw and slide, the lead screw is followed the radial direction of pitch bearing sets up, the lead screw with fastening platform rotatable coupling, the slide with fastening platform sliding connection, the lead screw with slide threaded connection, fastener includes cylinder, intelligent servo tightening machine, the output shaft axis of intelligent servo tightening machine with the axis of pitch bearing is parallel, intelligent servo tightening machine with slide slidable is connected, the cylinder is fixed to be set up on the slide, the cylinder is used for the drive intelligent servo tightening machine slides along output shaft axial direction. Further, the fastening assembly further comprises a reducing driving device, and the reducing driving