Wind power gear box output structure convenient to maintain on tower
By adopting an upwind oil injection ring and hydraulic cylinder design in the wind turbine gearbox output structure, the problem of the wind turbine gearbox output bearing being unable to be maintained on the tower has been solved, enabling convenient replacement and lubrication of the output shaft system, and reducing maintenance costs and wear.
Patent Information
- Application Number
- CN202520944248.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-05-14
AI Technical Summary
The wind direction bearing on the output shaft of the existing doubly fed wind turbine gearbox cannot be repaired or replaced on the tower due to the compact design of the gearbox, which may cause greater losses during the replacement process.
A wind turbine gearbox output structure designed for easy tower maintenance is presented. Through the cooperation of the upwind oil injection ring and the hydraulic cylinder, the output shaft system can be easily disassembled and replaced. This includes interference fit of the inner ring of the upwind bearing, clearance fit of the outer ring, setting of the lubrication oil circuit of the oil injection ring, and use of hydraulic cylinder tooling, ensuring that maintenance can be completed without opening the gearbox.
It enables convenient replacement of the output shaft system on the tower, reduces maintenance costs, prevents bearing slippage and wear, improves lubrication, and reduces losses caused by unpacking and maintenance.
Smart Images
Figure CN223923783U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a wind power gear box structure field, concretely speaking, a wind power gear box output structure convenient for tower maintenance. BACKGROUND
[0002] Wind power generation has the advantages of no pollution and low construction cost, and in recent years, wind power generation has developed rapidly.
[0003] The existing double-fed wind power gear box output shaft upper wind direction bearing is mostly NU bearing / N bearing, and under the condition that the box body design is relatively compact, the upper wind direction bearing cannot be maintained and replaced on the tower. UTILITY MODEL CONTENTS
[0004] The utility model provides a wind power gear box output structure convenient for tower maintenance, which aims to solve the defects in the prior art, and can conveniently replace the output shaft system without opening the box, thereby avoiding greater loss caused by opening the box.
[0005] The utility model solves the technical problems by adopting the following technical scheme:
[0006] A wind power gear box output structure convenient for tower maintenance, characterized by:
[0007] The upper wind direction oil injection ring gap fit is installed in the upper wind direction bearing hole of the left side of the box body;
[0008] The inner ring of the upper wind direction bearing is interference fitted on the output shaft, and the outer ring of the upper wind direction bearing is gap fitted with the upper wind direction bearing hole of the box body;
[0009] The bearing inner ring pressing plate is installed on the output shaft and fastened with the output shaft end face by screws, and the bearing inner ring pressing plate is located at the left side of the upper wind direction bearing and pressed on the left end face of the bearing inner ring of the upper wind direction bearing; the bearing outer ring pressing plate is inserted into the upper wind direction bearing hole, and the bearing outer ring pressing plate is located at the right side of the upper wind direction bearing outer ring and pressed on the right end face of the bearing outer ring of the upper wind direction bearing;
[0010] The lower wind direction oil blocking ring, the lower wind direction bearing, the locking nut and the lower wind direction oil injection ring are installed on the output shaft from left to right and located in the lower wind direction bearing hole of the right side of the box body;
[0011] The upper wind direction oil injection ring and the lower wind direction oil injection ring have lubricating oil channels;
[0012] The middle part of the upper wind direction oil injection ring is provided with a tool screw hole coaxial with the upper wind direction oil injection ring;
[0013] The output shaft gear is installed on the output shaft, and the intermediate shaft gear on the intermediate shaft is engaged with the output shaft gear;
[0014] The width of the upper wind direction bearing outer ring is less than the distance from the left end face of the intermediate shaft gear to the right end face of the upper wind direction bearing hole of the box body;
[0015] When the upper wind direction bearing is disassembled, and the remaining upper wind direction oil injection ring and the upper wind direction bearing outer ring are located in the upper wind direction bearing hole:
[0016] The hydraulic cylinder is installed on the right side of the box body through a hydraulic cylinder mounting device, and the left end of the hydraulic cylinder rod is a tool screw rod with threads, which is screwed into the tool screw hole of the upper wind direction oil injection ring, so that the hydraulic cylinder rod is fixedly connected with the upper wind direction oil injection ring.
[0017] The hydraulic cylinder mounting device comprises:
[0018] Two or more screw rods are screwed into two or more screw holes respectively formed in the right end face of the box body, the screw rods pass through the through holes formed in the corresponding positions of the tool flat plate, two fastening nuts are screwed on the screw rods and are tightly arranged on the left and right end faces of the tool flat plate respectively, the hydraulic cylinder is mounted on the right end face of the tool flat plate, the hydraulic cylinder rod passes through the central through hole of the tool flat plate, and the tool screw rod at the left end of the hydraulic cylinder rod is screwed into the tool screw hole of the upper wind direction oil injection ring.
[0019] The lower wind direction oil blocking ring and the lower wind direction bearing are installed on the output shaft in an interference fit, and the lower wind direction bearing, the lower wind direction oil injection ring and the lower wind direction oil injection ring are installed in the lower wind direction bearing hole on the right side of the box body in a clearance fit; and the locking nut is installed on the right side of the lower wind direction bearing.
[0020] The outer circumferential surface of the upper wind direction oil injection ring is provided with a stop pin hole, and the stop pin hole in the corresponding position of the box body is connected through a stop pin; the right end face of the upper wind direction oil injection ring is provided with a through hole, and the stop groove of the outer ring of the upper wind direction bearing is connected through a stop pin.
[0021] The upper wind direction oil injection ring is composed of a large-diameter upper wind direction oil injection ring main body and a small-diameter boss protruding to the left in the middle of the upper wind direction oil injection ring main body, and the tool screw hole extends into the boss.
[0022] The width of the upper wind direction oil injection ring main body is less than the distance from the left end face of the intermediate shaft gear to the right end face of the upper wind direction bearing hole of the box body.
[0023] The outer circumferential surface of the upper wind direction oil injection ring has a lubricating oil groove, the lubricating oil groove is communicated with a radial oil hole, the radial oil hole is communicated with an axial oil hole, the lubricating oil groove is communicated with a lubricating oil passage in the box body, the axial oil hole faces the upper wind direction bearing, and the lubricating oil groove, the radial oil hole and the axial oil hole form a lubricating oil passage of the upper wind direction oil injection ring.
[0024] The upper wind direction oil injection ring has the advantages that:
[0025] 1) The hydraulic cylinder and the simple tool can be conveniently used on the tower to realize disassembly and maintenance of the output shaft system;
[0026] 2) Good bearing lubrication effect;
[0027] 3) Bearing, oil injection ring and the like increase the stop pin, prevent the slip and the abrasion caused by the high speed operation of the output shaft;
[0028] 4) Fewer types of shaft parts, saving labor, low cost of on-tower replacement and maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0029] The utility model will be further explained in connection with the drawings and embodiments.
[0030] Figure 1 It is the general structure diagram of the utility model;
[0031] Figure 2 It is the structure schematic diagram of the upper wind direction oil injection ring of the utility model;
[0032] Figure 3 It is the on-tower maintenance process schematic diagram of the utility model. DETAILED DESCRIPTION
[0033] In order to more clearly illustrate the technical scheme of the utility model, the following will be briefly introduced to the drawing needed to be used in the description, obviously, the drawing in the following description is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, other embodiments can also be obtained according to these drawings.For the convenience of understanding the utility model, the following will be more detailed in connection with the drawings and specific embodiments, the utility model is explained.
[0034] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intervening elements can be present therebetween.When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intervening elements can be present therebetween.The terms "upper", "lower", "inner", "outer", "bottom", etc., used in the specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second", "third", etc., are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0035] As shown in Figure 1 , Figure 2 :
[0036] The utility model is a wind power gear box output structure convenient for on-tower maintenance.
[0037] The upwind oil injection ring 3 is installed in the upwind bearing hole 13 on the left side of the box 1 in clearance fit, and the downwind oil injection ring 10 is installed in the downwind bearing hole 14 on the right side of the box 1 in clearance fit. (For the convenience of description, the upwind direction is left, and the downwind direction is right)
[0038] The inner ring 41 of the upwind bearing 4 is installed on the output shaft 2 in interference fit, and the outer ring 42 of the upwind bearing 4 is installed in the upwind bearing hole 13 of the box 1 in clearance fit. The bearing inner ring pressing plate 5 is installed on the output shaft 1 and fastened with the end face of the output shaft 1 by screws, and is located on the left side of the upwind bearing 4 and pressed on the left end face of the bearing inner ring 41 of the upwind bearing 4. The bearing outer ring pressing plate 6 is inserted into the upwind bearing hole 13, and is located on the right side of the upwind bearing outer ring and pressed on the right end face of the bearing outer ring 42 of the upwind bearing 4.
[0039] The downwind oil retaining ring 7, the downwind bearing 8, the locking nut 9 and the downwind oil injection ring 10 are installed on the output shaft 2 from left to right near the output end side, and are located in the downwind bearing hole 14 on the right side of the box 1. The downwind oil retaining ring 7 and the downwind bearing 8 are installed on the output shaft 2 in interference fit, and the locking nut 9 is installed on the right side of the downwind bearing 8. The downwind bearing 8 is installed in the downwind bearing hole 14 on the right side of the box 1 in clearance fit. The downwind oil injection ring 10 is installed in the downwind bearing hole 14 on the right side of the box 1 in clearance fit.
[0040] The upwind oil injection ring 3 is composed of a large-diameter upwind oil injection ring body 35 and a small-diameter boss 36 protruding to the left in the middle of the upwind oil injection ring body 35. The middle of the upwind oil injection ring 3 is provided with a tool screw hole 31 coaxial with the upwind oil injection ring 3, and the tool screw hole 31 extends into the boss 36. The boss 36 accommodates the tool screw hole 31 under the premise of controlling the width of the upwind oil injection ring body 35, so that the size and depth of the tool screw hole 31 can match the hydraulic cylinder rod 57.
[0041] Among them, the outer circumferential surface of the upwind oil injection ring body 35 is provided with a stop pin hole, and the stop pin hole at the corresponding position on the box 1 is connected through a stop pin; the right end face of the upwind oil injection ring body 35 is provided with a through hole, and the stop groove of the outer ring 42 of the upwind bearing 4 is connected through a stop pin; in this way, the wear of the upwind oil injection ring 3 and the outer ring 42 of the upwind bearing 4 due to slipping during operation is prevented.
[0042] The outer periphery of the main body 35 of the upwind oil injection ring 3 has a lubricating oil groove 32. The lubricating oil groove 32 is connected to a radial oil hole 33, and the radial oil hole 33 is connected to an axial oil hole 34. The lubricating oil groove 32 is connected to the lubricating oil passage inside the housing 1. The axial oil hole 34 faces the upwind bearing 4. In this way, the lubricating oil passes through the lubricating oil passage inside the housing 1, the lubricating oil groove 32, the radial oil hole 33, and the axial oil hole 34, and is finally sprayed out from the axial oil hole 34 to lubricate the upwind bearing 4. The lubricating oil groove 32, the radial oil hole 33, and the axial oil hole 34 form the lubricating oil passage of the upwind oil injection ring.
[0043] The outer diameter of the downwind oil baffle ring 7 is higher than the roller of the downwind bearing 8.
[0044] The downwind injection ring 10 has a stop pin hole on one side, which is connected to the stop pin hole at the corresponding position on the housing 1 by a stop pin; the downwind injection ring 10 has a through hole on the other side, which is connected to the stop groove of the outer ring of the downwind bearing 8 by a stop pin; this prevents the downwind injection ring 10 and the outer ring of the downwind bearing 8 from slipping and causing wear during operation.
[0045] The downwind oil injection ring 10 is also provided with a downwind oil injection ring lubrication oil passage for lubricating the downwind bearing 8 in the radial direction and on the end face. The structure of the downwind oil injection ring lubrication oil passage is the same as that of the upwind oil injection ring lubrication oil passage.
[0046] An output shaft gear 200 is mounted on the output shaft 2, and an intermediate shaft gear 100 on the intermediate shaft meshes with the output shaft gear 200, thereby driving the output shaft 2.
[0047] The width L1 of the outer ring 42 of the upwind bearing is less than the distance L2 from the left end face B of the intermediate shaft gear 100 to the right end face A of the upwind bearing hole 13 of the housing 1 (L2 is the retractable distance of the outer ring 42 of the upwind bearing).
[0048] The width L3 of the upper-direction fuel injection ring body 35 is less than the distance L2 from the left end face B of the intermediate shaft gear 100 to the right end face A of the upper-direction bearing hole 13 of the housing 1.
[0049] As attached Figure 3 As shown:
[0050] When the windward bearing 4 on the output shaft is damaged and needs repair:
[0051] Remove the downwind oil baffle ring 7, downwind bearing 8, lock nut 9, and downwind oil injection ring 10.
[0052] Remove the outer ring pressure plate 6 of the upwind bearing 4.
[0053] Disassemble output shaft 2. Since the inner ring 41 of the upper wind bearing is interference-fitted to output shaft 2, the inner ring 41 of the upper wind bearing can be pulled out of housing 1 together with output shaft 2.
[0054] Thus, the upper wind direction oil injection ring 3 and the upper wind direction bearing outer ring 42 are left.
[0055] Two or more than two screws 51 are screwed into two or more than two screw holes 15 respectively opened on the right end face of the box 1, and each screw hole 15 is distributed circumferentially relative to the axis of the upper wind direction bearing hole 13.
[0056] The screw 51 passes through the corresponding through hole 53 on the tool flat plate 52, and two fastening nuts 55 are screwed on the screw 51 and tightly abut against the left and right end faces of the tool flat plate 52 respectively.
[0057] In this way, the screw 51 is fixed on the right end face of the box 1, the tool flat plate 52 is fixed on the screw 51, and the fastening nuts 55 play the role of adjusting the position of the tool flat plate 52 and fastening the tool flat plate 52.
[0058] The hydraulic cylinder 56 is installed on the right side of the tool flat plate 52, the hydraulic cylinder rod 57 passes through the center through hole 54 of the tool flat plate 52, the left end of the hydraulic cylinder rod 57 is a tool screw 571 with threads, and the tool screw 571 is screwed into the tool screw hole 31 of the upper wind direction oil injection ring 3, so that the hydraulic cylinder rod 57 is fixed with the upper wind direction oil injection ring 3.
[0059] Start the hydraulic cylinder 56, move the hydraulic cylinder rod 57 to the right, pull the upper wind direction oil injection ring 3 to the right, and push the upper wind direction bearing outer ring 42 to the right with the upper wind direction oil injection ring 3, and push out the upper wind direction bearing hole 13.
[0060] Because:
[0061] The width L1 of the upper wind direction bearing outer ring 42 is less than the distance L2 from the left end face B of the intermediate shaft gear 100 to the right end face A of the upper wind direction bearing hole 13 of the box 1 (L2 is the extractable distance of the upper wind direction bearing outer ring 42).
[0062] The width L3 of the upper wind direction oil injection ring body 35 is less than the distance L2 from the left end face B of the intermediate shaft gear 100 to the right end face A of the upper wind direction bearing hole 13 of the box 1.
[0063] Therefore, the upper wind direction bearing outer ring 42 and the upper wind direction oil injection ring body 35 can enter the interval of L2 without interfering with the intermediate shaft gear 100.
[0064] By using the tool screw hole 31 in the upper wind direction oil injection ring 3, the hydraulic cylinder and the tool are installed, the upper wind direction oil injection ring 3 and the upper wind direction bearing outer ring 42 can be easily detached from the box 1, and the output shaft system can be replaced in the air without opening the box.
[0065] The utility model discloses output shaft drives bearing high -speed operation, and lubricating oil is provided with proper lubricating oil to bearing through both sides oil injection ring. Bearing, oil injection ring etc. increase stop pin, prevent the skidding and abrasion caused when output shaft high -speed operation. Axle system spare is less, easy processing. When the output shaft appears failure, needs maintaining on the tower, first, output shaft and the rest spare, the upper wind direction bearing inner ring installed on the axle are extracted together, then utilizes the tooling long screw hole of upper wind direction bearing, installs hydraulic cylinder and tooling screw rod on the box, takes out the upper wind direction bearing outer ring, does not damage bearing hole, bearing, oil injection ring. Through the cooperation of the tooling screw hole and screw rod of upper wind direction oil injection ring, hydraulic cylinder, can quickly solve the problem that upper wind direction bearing outer ring cannot be disassembled, guarantees that the wind power gear box output axle system can be conveniently replaced output axle system under the condition of not opening the box, thereby avoiding the greater loss caused by opening the box.
[0066] The various embodiments are described in the specification by way of progression, each building on the last to facilitate ease of understanding. The embodiments are illustrative of the application but not limiting thereof. The specification is intended to cover any alternatives, modifications, or equivalents as would be would be apparent to one to have ordinary skill in the art having the benefit of this disclosure. The specification is intended to cover any and all such alternatives, modifications or equivalents.
Claims
1. A wind turbine gearbox output structure facilitating on-tower maintenance, characterized in that: an upwind oil jet ring is installed in the upwind bearing hole on the left side of the gearbox in a clearance fit; the inner ring of the upwind bearing is installed on the output shaft in an interference fit, and the outer ring of the upwind bearing is in clearance fit with the upwind bearing hole of the gearbox; a bearing inner ring pressing plate is installed on the output shaft and fastened to the end face of the output shaft with screws, and is located on the left side of the upwind bearing and pressed against the left end face of the bearing inner ring of the upwind bearing; a bearing outer ring pressing plate is inserted into the upwind bearing hole, and is located on the right side of the outer ring of the upwind bearing and pressed against the right end face of the bearing outer ring of the upwind bearing; a downwind oil retaining ring, a downwind bearing, a lock nut, and a downwind oil jet ring are installed on the output shaft from left to right and located in the downwind bearing hole on the right side of the gearbox; the upwind oil jet ring and the downwind oil jet ring have lubricating oil channels inside; the upwind oil jet ring has a tool screw hole in the middle coaxial with the upwind oil jet ring; the output shaft is installed with an output shaft gear, and the intermediate shaft gear on the intermediate shaft is in mesh with the output shaft gear; the width of the outer ring of the upwind bearing is less than the distance from the left end face of the intermediate shaft gear to the right end face of the upwind bearing hole of the gearbox; when the upwind bearing is disassembled and the remaining upwind oil jet ring and upwind bearing outer ring are located in the upwind bearing hole: a hydraulic cylinder is installed on the right side of the gearbox with a hydraulic cylinder mounting device, and the left end of the hydraulic cylinder rod is a tool screw rod with threads, which is screwed into the tool screw hole of the upwind oil jet ring, so that the hydraulic cylinder rod is fixed to the upwind oil jet ring.
2. The wind turbine gearbox output structure of claim 1, characterized in that: the hydraulic cylinder mounting device is: two or more screw rods are screwed into two or more screw holes respectively opened in the right end face of the gearbox; the screw rods pass through the through holes opened in the corresponding tool flat plate, and two fastening nuts are screwed on the screw rods and tightly abut against the left and right end faces of the tool flat plate; the hydraulic cylinder is installed on the right side of the tool flat plate, the hydraulic cylinder rod passes through the center through hole of the tool flat plate, and the tool screw rod at the left end of the hydraulic cylinder rod is screwed into the tool screw hole of the upwind oil jet ring.
3. The wind turbine gearbox output structure of claim 1, characterized in that: the downwind oil retaining ring and the downwind bearing are installed on the output shaft in an interference fit, and the downwind bearing, the downwind oil jet ring, and the downwind oil jet ring are installed in the downwind bearing hole on the right side of the gearbox in a clearance fit; the lock nut is installed on the right side of the downwind bearing.
4. The wind turbine gearbox output structure of claim 1, characterized in that: the outer periphery of the upwind oil jet ring is provided with a stop pin hole, and the stop pin hole in the corresponding position on the gearbox is connected by a stop pin; the right end face of the upwind oil jet ring is provided with a through hole, and the stop groove of the outer ring of the upwind bearing is connected by a stop pin.
5. The wind turbine gearbox output structure of claim 1, characterized in that: the upwind oil jet ring is composed of a large-diameter upwind oil jet ring main body and a small-diameter boss protruding to the left in the middle of the upwind oil jet ring main body, and the tool screw hole extends into the boss.
6. The wind turbine gearbox output structure facilitating on-tower maintenance of claim 5, wherein: The width of the upwind oil injection ring body is less than the distance from the left end surface of the gear to the right end surface of the upwind bearing hole of the case.
7. A wind turbine gearbox output structure facilitating on-tower servicing as claimed in claim 1, characterized in that: The outer periphery of the upwind oil injection ring has a lubricating oil groove, the lubricating oil groove is communicated with a radial oil hole, the radial oil hole is communicated with an axial oil hole, the lubricating oil groove is communicated with a lubricating oil passage in the case, the axial oil hole faces the upwind bearing, and the lubricating oil groove, the radial oil hole, and the axial oil hole form a lubricating oil passage of the upwind oil injection ring.