A wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device

Abstract

The present invention relates to a wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device, including a cutting mechanism and a connecting mechanism; the cutting mechanism includes a cutting base, a fixture base, a driving assembly, a positioning screw, a threaded sleeve, a cutting main frame, a saw frame, a saw blade and a connecting rod; the connecting mechanism includes a special sleeve, a special bolt, a wedge block, a screw plug and a set screw. The present invention simplifies the maintenance steps, adopts a maintenance method in which the wind turbine cable protection sleeve is mechanically cut in the nacelle, and the cut wind turbine cable protection sleeve and the disassembled sun gear shaft are transported to the ground through the tower tube to be machined, and then the sun gear shaft and the cable protection sleeve are installed in the nacelle through the connecting mechanism, thereby reducing the maintenance construction time, completing the maintenance work without completely disassembling the unit gear box, reducing the risk of parts damage and economic benefit loss caused by the transportation and disassembly process, and improving the maintenance efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wind generator planetary gearbox maintenance, in particular to a wind generator planetary gearbox sun gear shaft tower replacement and maintenance device. Background Art

[0002] As a key component of wind turbine generator set, wind turbine planetary gearbox is used for wind turbine generator set impeller power transmission and speed increase. The wind turbine planetary gearbox sun gear shaft completes power transmission by meshing with the planetary gear, planetary carrier and low-speed wheel. Due to the instability of meteorology and the structural characteristics of the wind turbine planetary gearbox sun gear shaft, the wind turbine planetary gear shaft often bears large dynamic torque under irregular wind force and strong gust impact variable load, which leads to a high failure rate of the wind turbine planetary gear shaft. When the wind turbine planetary gear shaft is damaged or reaches the end of its service life, it needs to be regularly repaired and replaced to ensure the normal operation of wind power generation equipment and eliminate working failures and equipment risks.

[0003] The structure of the existing wind turbine nacelle is as follows Fig. 9 As shown, the impeller transmits power to the planetary gearbox through the transmission shaft, the sun gear end of the planetary gearbox sun gear shaft meshes with the planetary gears in the planetary gearbox planetary carrier, the low-speed wheel end of the planetary gearbox sun gear shaft meshes with the internal teeth of the low-speed wheel, and the low-speed wheel finally transmits power to the generator through multi-stage gears.

[0004] At present, due to the complexity of the structure of the wind turbine generator set and the limited space, the sun gear shaft of the planetary gearbox cannot be directly disassembled. During maintenance, the upper cover of the wind turbine nacelle is usually disassembled, and the entire unit gearbox is disassembled and transported to the ground by a large crane. The sun gear shaft of the planetary gearbox is repaired or replaced on the ground, and then the repaired unit gearbox is hoisted to the nacelle for installation. The process of disassembling and transporting the unit gearbox to the ground will bring damage risks to the internal parts of the wind turbine generator set. At the same time, this method has the disadvantages of long maintenance time, high cost and manpower consumption, which leads to long equipment downtime and brings certain income losses to the investor. The current common wind turbine planetary gearbox sun gear shaft maintenance method has low maintenance efficiency, so that the emergency repair of the wind turbine generator cannot be completed in time. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device, which simplifies the maintenance steps, mechanically cuts the wind turbine cable protection sleeve in the nacelle, and manually drills the cut end face of the remaining cut portion of the wind turbine cable protection sleeve in the nacelle after the cutting is completed, and the cut wind turbine cable protection sleeve and the disassembled sun gear shaft are transported through the inside of the tower to the ground for machining, and then the machined cut portion of the wind turbine cable protection sleeve and the sun gear shaft to be installed are transported through the inside of the tower to the nacelle, and the sun gear shaft and the cable protection sleeve are installed in the nacelle through a connecting device. The maintenance method reduces the construction time of the maintenance process, so that the maintenance work can be completed without completely disassembling the unit gear box, reduces the risk of parts damage and economic benefit loss caused by the transportation and disassembly process, and improves maintenance efficiency.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The present invention provides a wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device, comprising a cutting mechanism and a connecting mechanism;

[0008] The cutting mechanism comprises a cutting base, a clamp base, a driving assembly, a positioning screw, a threaded sleeve, a cutting main frame, a saw frame, a saw blade and a connecting rod; the clamp base is connected to the lower housing of the gear box of the wind turbine generator set by bolts; the cutting base is slidably connected to one side of the upper end surface of the clamp base in a transverse direction; the driving assembly is arranged on the upper end surface of the cutting base; the cutting main frame is transversely arranged in the middle of the upper end surface of the clamp base and one end is connected to the driving assembly; the top of the saw frame is slidably connected to the front end surface of the cutting main frame; the saw blade is transversely fixed between the two sides of the bottom of the saw frame; a threaded sleeve is vertically arranged on one side of the cutting main frame; the positioning screw passes through the threaded sleeve and the bottom end is hinged to the cutting base; one end of the connecting rod is connected to the driving assembly, and the other end is connected to the upper part of one side of the saw frame;

[0009] The connecting mechanism includes a special sleeve, a special bolt, a wedge block, a screw plug and a set screw; the special bolts are evenly distributed around the circumference and connected between the circumferential end faces of the cut portion of the wind turbine cable protection sleeve and the remaining cut portion of the wind turbine cable protection sleeve; the special sleeve is radially installed at the front end of the remaining cut portion of the wind turbine cable protection sleeve and corresponds to the special bolts one by one; the special bolt and the corresponding special sleeve are connected through a wedge block; and a screw plug is installed at the outer end of the special sleeve through a set screw.

[0010] Furthermore, the driving assembly includes a rotating motor, a small pulley, a V-belt, a main shaft, a large pulley, a crank disc and a main shaft supporting box; the rotating motor is arranged on one side of the upper end surface of the cutting base; the main shaft supporting box is arranged in the middle of the upper end surface of the cutting base; the main shaft is rotatably connected to the inside of the main shaft supporting box; the small pulley is arranged on the output shaft of the rotating motor; the large pulley is arranged at the rear end of the main shaft; the large pulley and the small pulley are connected by a V-belt; the crank disc is arranged at the front end of the main shaft; one end of the connecting rod is connected to the crank disc, and the other end is connected to the saw frame; one end of the cutting main frame is rotatably connected to the main shaft supporting box.

[0011] Furthermore, a main shaft supporting rib is arranged on the front side of the main shaft; and the bottom of the main shaft supporting rib is fixedly connected to the cutting base.

[0012] Furthermore, vertical positioning frames are symmetrically arranged on both sides of the bottom of the cutting main frame.

[0013] Furthermore, transverse slide rails B are symmetrically arranged at the front and rear ends of the left side of the upper end surface of the clamp base; a slide groove corresponding to the slide rail B is arranged inside the cutting base; and the cutting base is slidably connected to the slide rail B through the slide groove.

[0014] Furthermore, slide rails A are symmetrically arranged on both sides of the upper and lower front end surface of the cutting main frame; the top of the saw frame is provided with slide grooves corresponding to the slide rails A on both sides; and the saw frame is slidably connected to the slide rails A through the slide grooves.

[0015] Furthermore, a limiting groove A is provided on the threaded sleeve; special-shaped holes are provided at positions corresponding to the threaded sleeve on the cutting main frame; and the upper and lower surfaces of the cutting main frame are respectively slidably connected to the threaded sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Due to the limited space in the wind turbine cabin and the complex maintenance conditions, when repairing and replacing the sun gear shaft of the wind turbine planetary gearbox, the cutting device can be used to mechanically cut the wind turbine cable protection sleeve without completely disassembling the main shaft box. The cutting depth can be adjusted by the threaded sleeve. In addition, the present invention achieves the effect of cutting a larger workpiece with a smaller cutting device body by arranging a slide rail B and a positioning frame, and the positioning frame can accurately define the position of the workpiece and the cutting base; the generator cabin is located in the air and the transportation channel is narrow. The cutting base and the clamp base are disassembled along the slide rail B, which can fully meet the transportation conditions and is easy to disassemble and assemble, reducing the risk of damage to wind turbine parts due to collision during transportation, simplifying the maintenance process, shortening the maintenance time, and reducing manpower consumption.

[0018] 2. When replacing and repairing the sun gear shaft of the planetary gearbox of the wind turbine generator, first install the replaced sun gear shaft of the planetary gearbox of the wind turbine generator, and then use this connecting device to install the cut part of the cable protection sleeve of the wind turbine generator and the remaining part of the cable protection sleeve. This device can achieve the connection between the cut part of the cable protection sleeve and the remaining part of the cable protection sleeve by setting a special sleeve, a special bolt, a wedge block, a screw plug and a set screw. After the installation is completed, the cut surface of the cable protection sleeve is coated with glue to prevent cable corrosion, which simplifies the transportation process, saves transportation costs and construction time, and reduces the risk of wear and even damage of parts due to disassembly and transportation during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the cutting device of the present invention;

[0020] Figure 2 is a schematic side view of the structure of the cutting device of the present invention;

[0021] Figure 3 It is a schematic diagram of the main structure of the clamp base of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall structure of the cutting working condition of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the connecting device and the connected workpieces of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the connection device of the present invention;

[0025] Figure 7 It is a top view structural schematic diagram of the special sleeve of the present invention;

[0026] Figure 8 It is a side view structural schematic diagram of the special bolt of the present invention;

[0027] Fig. 9 It is a schematic diagram of the overall structure of an existing wind turbine cabin.

[0028] Among them, the figure marks are: 1-cable protection sleeve; 2-gearbox sun gear shaft; 3-low speed wheel; 4-planet carrier; 5-planetary gear; 6-cutting base; 7-clamp base; 8-rotating motor; 9-small pulley; 10-V belt; 11-spindle; 12-large pulley; 13-special-shaped hole; 14-positioning screw; 15-threaded sleeve; 16-cutting main frame; 17-saw frame; 18-positioning frame; 19-saw blade; 20-connecting rod; 21-limiting groove A; 22-crank disc; 23-spindle support rib; 24-spindle Support housing; 25-slide rail A; 26-slide rail B; 27-arched groove; 28-unit gearbox lower housing; 29-bolt; 30-gearbox bearing end cover; 31-remaining part of cable protection sleeve cut; 32-wedge block; 33-special bolt; 34-cable protection sleeve cut part; 35-screw plug; 36-special sleeve; 37-mounting hole; 38-limiting groove C; 39-torque groove; 40-limiting hole; 41-internal thread; 42-bevel; 43-setting screw; 44-limiting groove B; 45-hexagonal socket hole. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] It should be noted that in the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0031] See attached Figures 1 to 8 The specific structure of an embodiment of a wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device proposed by the present invention is given. The device includes two parts: a cutting mechanism and a connecting mechanism.

[0032] Among them, Figures 1 to 4As shown, the cutting mechanism includes a cutting base 6, a clamp base 7, a driving assembly, a positioning screw 14, a threaded sleeve 15, a cutting main frame 16, a saw frame 17, a positioning frame 18, a saw blade 19 and a connecting rod 20; an arched groove 27 is provided in the middle of the clamp base 7; the left and right ends of the clamp base 7 are fixedly connected to the left and right sides of the lower box body 28 of the wind turbine gear box by two bolts 29 respectively; the front and rear ends of the left side of the upper end surface of the clamp base 7 are symmetrically provided with transverse slide rails B26; the cutting base 6 is provided with a slide rail B26 The cutting base 6 is slidably connected to the slide rail B26 through the slide groove, so that the cutting base 6 can move laterally along the slide rail B26; the driving assembly is arranged on the upper end surface of the cutting base 6; the cutting main frame 16 is laterally connected to the middle of the upper end surface of the clamp base 7 and one end is rotatably connected to the driving assembly; the front end surface of the cutting main frame 16 is symmetrically provided with slide rails A25 on both sides; the saw frame 17 is a concave frame corresponding to the arched groove 27, and the top of its inner end surface is respectively provided with slide grooves corresponding to the slide rails A25; the saw frame 17 is connected to the slide rails through the slide grooves The saw blade 19 is laterally fixed between the bottoms of the two sides of the saw frame 17; the saw frame 17 reciprocates along the direction of the slide rail A25 under the traction of the connecting rod 20, so that the saw blade 19 performs cutting work; a threaded sleeve 15 is vertically arranged inside one side of the cutting main frame 16, and the upper and lower surfaces of the cutting main frame 16 are respectively slidably connected to the threaded sleeve 15; a limiting groove A21 is arranged on the threaded sleeve 15; a special-shaped hole 13 is arranged at the corresponding position of the cutting main frame 16 and the threaded sleeve 15; the outer surface of the limiting groove A21 The surface is slidably connected to the inner surface of the special-shaped hole 13; the positioning screw 14 passes through the threaded sleeve 15 and the bottom end is hinged to the cutting base 6; one end of the connecting rod 20 is connected to the driving assembly, and the other end is connected to the upper part of one side of the saw frame 17; vertical positioning frames 18 are symmetrically arranged on both sides of the bottom of the cutting main frame 16; the positioning frames 18 are respectively vertically fixed to the bottom of both sides of the cutting main frame 16, and there are two positioning frames 18, and the two positioning frames 18 are respectively arranged at the tangent position with the gear box sun gear shaft 2, so that the positioning frames 18 fix the position of the cutting base 6.

[0033] The driving assembly includes a rotating motor 8, a small pulley 9, a V-belt 10, a spindle 11, a large pulley 12, a crank disc 22, a spindle support rib 23 and a spindle support box 24; the rotating motor 8 is fixedly connected to the left side of the upper end surface of the cutting base 6; the spindle support box 24 is fixed to the middle of the upper end surface of the cutting base 6; the spindle 11 is rotatably connected inside the spindle support box 24 and is parallel to the output shaft of the rotating motor 8; the small pulley 9 is connected to the output of the rotating motor 8 The end of the shaft; the large pulley 12 is connected to the rear end of the main shaft 11; the large pulley 12 and the small pulley 9 are connected by a V-belt 10; the crank disc 22 is connected to the front end of the main shaft 11; one end of the connecting rod 20 is connected to the crank disc 22, and the other end is connected to one side of the saw frame 17; the left end of the cutting main frame 16 is connected to the main shaft support box 24; a main shaft support rib 23 is provided on the front side of the main shaft 11; the bottom of the main shaft support rib 23 is fixedly connected to the cutting base 6.

[0034] like Figures 5 to 8 As shown, the connecting mechanism includes a wedge block 32, a special bolt 33, a screw plug 35, a special sleeve 36 and a set screw 43; the special bolts 33 are evenly distributed around the circumference and connected between the circumferential end faces of the cut portion 34 of the wind turbine cable protection sleeve and the remaining cut portion 31 of the wind turbine cable protection sleeve; the special sleeve 36 is radially installed at the front end of the remaining cut portion 31 of the wind turbine cable protection sleeve and corresponds to the special bolts 33 one by one; the special bolt 33 is connected to the corresponding special sleeve 36 through a wedge block 32 installed inside the special sleeve 36; the outer end of the special sleeve 36 is installed with a screw plug 43 through a set screw 43.

[0035] In this embodiment, the special bolts 33 are provided with six, and the threaded ends of the six special bolts 33 are evenly distributed along the axial circumference and connected to the cutting end surface of the cutting part 34 of the cable protection sleeve of the wind turbine generator. The head end of the special bolt 33 is provided with a hexagonal hole 45; the special sleeves 36 are provided with six, and the six special sleeves 36 are evenly distributed along the radial circumference and installed at the front end of the remaining cutting part 31 of the cable protection sleeve of the wind turbine generator; a torque groove 39 is provided on one side of the upper end of the special sleeve 36, an internal thread 41 is provided inside, a limiting hole 40 corresponding to the special bolt 33 is provided in the middle of the side wall, and limiting grooves B44 corresponding to the wedge block 32 are provided on both sides of the inner wall; the special bolt 33 and the special sleeve 36 It is connected by a wedge block 32, and there are six wedge blocks 32. The six wedge blocks 32 are respectively installed in the limiting groove B44 inside the special sleeve 36. The rear end face of the wedge block 32 is an 8° inclined surface 42, the middle part is provided with a limiting groove C38 corresponding to the special bolt 33, and the upper part is provided with a mounting hole 37, and the limiting groove C38 is tangent to the special bolt 33; a screw plug 35 is installed at the outer end of the special sleeve 36, and there are six screw plugs 35. The six screw plugs 35 are respectively fitted with the upper end surface of the wedge block 32, and the screw plug 35 and the special sleeve 36 are fixed by a fixing screw 43. There are six fixing screws 43, and the six fixing screws 43 are respectively installed at the threaded connection between the screw plug 35 and the special sleeve 36.

[0036] The working principle of the present invention is as follows: the present invention is disassembled into two parts, a cutting base 6 and a clamp base 7, which are transported from the ground to the cabin through a transportation channel twice, the upper housing of the unit gear box is disassembled and hoisted inside the cabin, the clamp base 7 is installed on the lower housing 28 of the unit gear box by bolts 29 in the cabin, and then the cutting base 6 is installed on the clamp base 7, so that the positioning frame 18 is tangent to the gear box sun gear shaft 2, the saw blade 19 is driven to reciprocate by rotating the motor 8, the height of the cutting main frame 16 is adjusted by rotating the threaded sleeve 15, so that the saw blade 19 completes the feeding work, and finally the cable protection sleeve 1 is completely cut by adjusting the threaded sleeve 15, so as to After the disassembly and replacement of the gearbox sun gear shaft 2 is completed, the special bolt 33 and the special sleeve 36 are installed to the cut and processed cable protection sleeve cutting part 34 and the cable protection sleeve cutting remaining part 31, the special sleeve 36 is rotated through the torque groove 39 to insert the special bolt 33 into the limiting hole 40, and the special sleeve 36 is connected to the special bolt 33 through the wedge block 32, so as to connect the cable protection sleeve cutting part 34 and the cable protection sleeve cutting remaining part 31, and the cable protection sleeve cutting part 34 and the cable protection sleeve cutting remaining part 31 are tightened and locked by rotating the screw plug 35 to prevent loosening.

[0037] Matters not covered in the present invention are all known technologies.

[0038] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device, characterized in that: The device comprises a cutting mechanism and a connecting mechanism; The cutting mechanism comprises a cutting base, a clamp base, a driving assembly, a positioning screw, a threaded sleeve, a cutting main frame, a saw frame, a saw blade and a connecting rod; the clamp base is connected to the lower housing of the gear box of the wind turbine generator set by bolts; the cutting base is slidably connected to one side of the upper end surface of the clamp base in a transverse direction; the driving assembly is arranged on the upper end surface of the cutting base; the cutting main frame is transversely arranged in the middle of the upper end surface of the clamp base and one end is connected to the driving assembly; the top of the saw frame is slidably connected to the front end surface of the cutting main frame; the saw blade is transversely fixed between the two sides of the bottom of the saw frame; a threaded sleeve is vertically arranged on one side of the cutting main frame; the positioning screw passes through the threaded sleeve and the bottom end is hinged to the cutting base; one end of the connecting rod is connected to the driving assembly, and the other end is connected to the upper part of one side of the saw frame; The connecting mechanism includes a sleeve, a bolt, a wedge block, a screw plug and a set screw; the bolts are evenly distributed around the circumference and connected between the circumferential end faces of the cut portion of the wind turbine cable protection sleeve and the remaining cut portion of the wind turbine cable protection sleeve; the sleeve is radially installed at the front end of the remaining cut portion of the wind turbine cable protection sleeve and corresponds to the bolts one by one; the bolt and the corresponding sleeve are connected through a wedge block; and a screw plug is installed at the outer end of the sleeve through a set screw.

2. The wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device according to claim 1, characterized in that: The driving assembly includes a rotating motor, a small pulley, a V-belt, a main shaft, a large pulley, a crank disc and a main shaft supporting box; the rotating motor is arranged on one side of the upper end surface of the cutting base; the main shaft supporting box is arranged in the middle of the upper end surface of the cutting base; the main shaft is rotatably connected to the inside of the main shaft supporting box; the small pulley is arranged on the output shaft of the rotating motor; the large pulley is arranged at the rear end of the main shaft; the large pulley and the small pulley are connected by a V-belt; the crank disc is arranged at the front end of the main shaft; one end of the connecting rod is connected to the crank disc, and the other end is connected to the saw frame; one end of the cutting main frame is rotatably connected to the main shaft supporting box.

3. The wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device according to claim 2, characterized in that: A main shaft supporting rib is arranged on the front side of the main shaft; and the bottom of the main shaft supporting rib is fixedly connected to the cutting base.

4. The wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device according to claim 1, characterized in that: Vertical positioning frames are symmetrically arranged on both sides of the bottom of the cutting main frame.

5. The wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device according to claim 1, characterized in that: The front and rear ends of the left side of the upper end surface of the clamp base are symmetrically provided with transverse slide rails B; the interior of the cutting base is provided with a slide groove corresponding to the slide rail B; the cutting base is slidably connected to the slide rail B through the slide groove.

6. The wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device according to claim 1, characterized in that: The front end surface of the cutting main frame is symmetrically provided with slide rails A on both sides; the top of the saw frame is provided with slide grooves corresponding to the slide rails A on both sides; the saw frame is slidably connected to the slide rails A through the slide grooves.

7. The wind turbine planetary gearbox sun gear shaft tower replacement and maintenance device according to claim 1, characterized in that: The threaded sleeve is provided with a limiting groove A; the cutting main frame and the threaded sleeve are provided with special-shaped holes at corresponding positions; the upper and lower surfaces of the cutting main frame are respectively slidably connected with the threaded sleeve.

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