Variable pitch bearing dislocation correction tool
By designing the pitch bearing misalignment correction tool, using the coordination of connecting rods and rotary parts, the problem of pitch bearing misalignment in wind power generation equipment is solved, rapid and safe correction is achieved, maintenance efficiency and fan availability are improved Rate.
Patent Information
- Application Number
- CN202420913980.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The new bolts cannot be installed normally due to inaccurate zero position in the early stage or misalignment in the later stage, resulting in safety hazards and low maintenance efficiency. The existing solutions require external professionals to deal with, affecting power loss.
A pitch bearing misalignment correction tool is designed, including connecting rods, cones, cones, cones, connectors, screws and rotors. Through the cooperation of these components, preloading forces can be applied one by one and misalignment can be avoided, simplifying the correction process.
Three to four maintenance personnel can complete bearing correction, shorten the correction time to 6 hours, reduce external employment costs, and improve on-site work efficiency and fan availability.
Smart Images
Figure CN222155342U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind power generation equipment, in particular to a misalignment correction tool for a variable pitch bearing. Background Art
[0002] With the application and popularization of wind power technology, wind power generation has been in service in my country for more than 20 years, and the models are getting larger and larger. Under years of operating under extreme conditions, the variable pitch bearings of some units have not been accurately calibrated in the early stage or the variable pitch bearings have been misaligned during later operation. In particular, after the blade bolts are broken, the old bolts can be taken out by some methods, but the new bolts cannot be installed normally.
[0003] The blade bolts of the existing Dongqi FD 93H 1.5MW units break frequently. When replacing the bolts, maintenance personnel usually find that the pitch bearings and flanges of a small number of units are misaligned. If the pitch bearing misalignment problem is not handled, the threads of the new bolts will be easily damaged when they are installed, which may pose some safety hazards or even make the installation impossible. It takes 5 to 6 days to find professional manufacturers to handle it on site, which seriously affects the efficiency of on-site maintenance and causes unnecessary power loss. Therefore, a pitch bearing misalignment correction tool is needed to solve the above problem. Utility Model Content
[0004] The utility model mainly provides a correction tool which can conveniently solve the misalignment of a variable pitch bearing.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a variable pitch bearing misalignment correction tool, comprising: a connecting rod, one end of the connecting rod is fixedly connected to a cone, the other end of the cone is fixedly connected to a conical head, the other end of the connecting rod is fixedly connected to a connecting piece, the other end of the connecting piece is fixedly connected to a screw, and the other end of the screw is fixedly connected to a rotating piece.
[0006] Preferably, the surface of the cone is provided with a spiral pattern. Through the above arrangement, the connecting rod can be rotated to apply pre-tightening force to each of the spiral pattern bolts, thereby avoiding the occurrence of misalignment again.
[0007] Preferably, the edge of one end of the cone is rounded. Through the above arrangement, it is convenient to insert the entire conical part of the tooling into the hole of the variable pitch bearing.
[0008] Preferably, the diameter of the connecting rod is smaller than the diameters of the conical head and the connecting piece. Through the above arrangement, the connecting rod can smoothly enter the inside of the pitch bearing hole along with the conical head.
[0009] Preferably, the shape of the rotating member is hexagonal, and the above arrangement can facilitate the rotation of the connecting rod.
[0010] Compared with the prior art, the advantages and positive effects of the utility model are:
[0011] In the utility model, three to four maintenance personnel can use the correction tool to correct the bearing misalignment. At the same time, the correction and maintenance time can be controlled within 6 hours, which can reduce the cost of external personnel and can be handled on-site by on-site maintenance personnel, greatly improving on-site work efficiency, reducing fault downtime, and improving the availability of the fan. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model provides a three-dimensional diagram of the overall structure of a variable pitch bearing misalignment correction tool;
[0013] Figure 2 The utility model proposes a plan view of the overall structure of a variable pitch bearing misalignment correction tool;
[0014] Figure 3 The utility model provides an overall structural sectional view of a variable pitch bearing misalignment correction tooling.
[0015] Legend: 1. Connecting rod; 2. Cone; 3. Conical head; 4. Connecting piece; 5. Screw; 6. Rotating piece. DETAILED DESCRIPTION
[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.
[0018] See also Figure 1-3The utility model provides a technical solution: a tool for correcting the misalignment of a pitch bearing, comprising a connecting rod 1, one end of the connecting rod 1 is fixedly connected with a cone 2, the other end of the cone 2 is fixedly connected with a conical head 3, the other end of the connecting rod 1 is fixedly connected with a connecting piece 4, the other end of the connecting piece 4 is fixedly connected with a screw 5, and the other end of the screw 5 is fixedly connected with a rotating piece 6. The three tooling rotating pieces 6 are simultaneously struck with a hammer with the three tooling cone 2 parts facing downward until all the tooling conical head 3 parts enter the hole of the pitch bearing and the tooling can move up and down, and the bearing misalignment correction is completed. At this time, the rotating piece 6 is rotated to apply pre-tightening force to each bolt to avoid misalignment again. Similarly, the original blade root connecting stud bolts are removed one by one in a diagonal and cross order. The process of removing one and immediately replacing one is adopted, and the bolts are removed and replaced one by one.
[0019] like Figure 1 As shown, the surface of the cone 2 is provided with a spiral pattern. Through the above arrangement, the connecting rod 1 can be rotated to apply pre-tightening force to each of the spiral pattern bolts, thereby preventing misalignment from occurring again.
[0020] like Figure 3 As shown, the edge of one end of the cone 2 is rounded. Through the above arrangement, it is convenient to put the tooling cone 2 into the hole of the pitch bearing.
[0021] like Figure 2 As shown, the diameter of the connecting rod 1 is smaller than the diameters of the conical head 3 and the connecting piece 4. Through the above arrangement, the connecting rod 1 can smoothly enter the hole of the pitch bearing along with the conical head 3.
[0022] like Figure 2 As shown, the shape of the rotating member 6 is hexagonal. Through the above arrangement, the connecting rod can be easily rotated.
[0023] The use method and working principle of this device are as follows: by adjusting the variable pitch bearing that needs to be corrected to the vertical downward state, and locking the wind wheel to adjust the high-speed shaft to the brake state, then use a torque wrench to remove the preload of all the bolts of the blade, and the order of removal should be carried out in the order of diagonal and cross, so that there is a gap of 1.5-2mm between the variable pitch bearing flange and the root of the blade, then ensure that there are at least ten threaded connections between the hexagonal turner and the stud bolt, and then force out the three blade bolts, each of which is spaced one hundred and twenty degrees at a time to form a regular triangle position, then use three correction tool cones with 2 heads facing downward, and use a hammer to knock the three tool turn parts with 6 heads at the same time, until the tool cone head 3 heads all enter the variable pitch bearing hole, the tool can move up and down, and the bearing misalignment correction is completed, and then apply preload to the bolts one by one to avoid misalignment again, and also remove the original blade root connection stud bolts one by one in the order of diagonal and cross, and adopt the process of removing one and immediately replacing one, and remove and replace them one by one.
[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A tool for correcting the misalignment of a pitch bearing. It is characterized in that include: A connecting rod (1), one end of the connecting rod (1) is fixedly connected to a cone (2), the other end of the cone (2) is fixedly connected to a conical head (3), the other end of the connecting rod (1) is fixedly connected to a connecting piece (4), the other end of the connecting piece (4) is fixedly connected to a screw rod (5), and the other end of the screw rod (5) is fixedly connected to a rotating piece (6).
2. A pitch bearing misalignment correction tool according to claim 1, Features: The surface of the cone (2) is provided with spiral patterns.
3. A pitch bearing misalignment correction tool according to claim 1, Features: One end edge of the cone (2) is rounded.
4. A pitch bearing misalignment correction tool according to claim 1, Features: The diameter of the connecting rod (1) is smaller than the diameters of the conical head (3) and the connecting piece (4).
5. The pitch bearing misalignment correction tool according to claim 1, Features: The rotating member (6) is in the shape of a hexagon.