Wind power gear box assembly convenient for separation and reassembly on tower

Abstract

The utility model discloses a wind power gear box assembly convenient for separation and reassembly on a tower, which relates to the technical field of wind power gear boxes and comprises a planet carrier, one side of the planet carrier is connected with a main shaft, one side of the planet carrier is connected with a hollow pipe through a flange plate, and the hollow pipe penetrates through a sun gear and a low-speed large gear assembly; the hollow pipe is divided into a first connecting section and a second connecting section, the first connecting section and the second connecting section are fixedly connected through a connecting component, and the inner wall of the connecting component is attached to the outer wall of the hollow pipe. According to the wind power gear box, the technical problem that due to the hollow pipe structure, the low-speed-level large gear assembly cannot be separated from the hollow pipe, and consequently a tower cannot be maintained is solved, the hollow pipe is divided into the first connecting section and the second connecting section, when the low-speed-level large gear assembly is damaged, the low-speed-level large gear assembly is independently taken down, and the maintenance cost is reduced. The problem that the gearbox cannot be completely disassembled due to the limitation of the hollow pipe structure is solved, the gearbox does not need to be integrally disassembled from a tower for maintenance, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power gear boxes, in particular to a wind power gear box component which is convenient for separation and reinstallation on a tower. Background Art

[0002] The wind turbine pitch cable is transmitted by the electric slip ring through the hollow tube of the gearbox. There are two main ways to connect the hollow tube: flange connection with the planetary frame or key connection. The hollow tube connected with the flange cannot be disassembled due to structural limitations, and the hollow tube connected with the key cannot be removed due to insufficient back space. Both of the above situations make it impossible to disassemble and replace the gear parts passed by the hollow tube. Taking the gearbox with a one-stage planetary stage and a two-stage parallel stage structure as an example, refer to Figure 1. The hollow tube is a flange structure. The hollow tube flange is installed on the planetary frame and passes through the sun gear and low-speed large gear assembly from the center position, and then connected to the electric slip ring. Since the main shaft is installed in the inner hole of the planetary frame, the bolts of the hollow tube flange cannot be removed.

[0003] On the one hand, when the front bearing of the low-speed gear or the tooth surface of the low-speed gear of the gear box is damaged, the hollow tube cannot be disassembled because the planet carrier is connected to the main shaft, so it cannot be taken out from the input end of the wind turbine. In addition, the low-speed gear assembly has a limited moving space distance to the output end and cannot be completely separated from the hollow tube. For the above reasons, if the gear parts and bearings passed through the hollow tube are damaged, the gear box lower tower can only be returned to the factory for repair, which has a high repair cost. Therefore, a wind power gearbox assembly is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a wind turbine gearbox assembly which is easy to separate and reinstall on a tower, thereby solving the technical problem that due to the hollow tube structure, the low-speed large gear assembly has a limited moving space distance toward the output end and cannot be completely separated from the hollow tube, resulting in the inability to repair the tower.

[0005] To achieve the above purpose, the utility model provides a wind power gearbox assembly that is easy to separate and reinstall on a tower, comprising:

[0006] A planet carrier, one side of which is connected to the main shaft, one side of which is connected to a hollow tube via a flange, and the hollow tube passes through a sun gear and a low-speed large gear assembly;

[0007] The hollow tube is divided into a first connecting section and a second connecting section, the first connecting section and the second connecting section are fixedly connected by a connecting member, and the inner wall of the connecting member is in contact with the outer wall of the hollow tube.

[0008] Preferably, the connecting member comprises: a bolt sleeve sleeved on the outer peripheral side of the hollow tube, and the middle portion of the bolt sleeve is located at the connecting position of the first connecting section and the second connecting section.

[0009] Preferably, a plurality of first threaded holes are arranged in an array on the outer peripheral side surface of the bolt sleeve, each of the first threaded holes is connected to a bolt rod, and one end of the bolt rod abuts against the outer wall of the hollow tube.

[0010] Preferably, the connecting component includes: a first flange and a second flange arranged on the outer peripheral side of the hollow tube, the first flange is sleeved on one end of the first connecting section, the second flange is sleeved on one end of the second connecting section, and the first flange and the second flange are connected by a plurality of bolt rods.

[0011] Preferably, a plurality of second threaded holes are arranged in an array on the outer peripheral side surface of the first flange and the outer peripheral side surface of the second flange, a plurality of third threaded holes are arranged in an array on one end of the first connecting section and one end of the second connecting section, and each second threaded hole coaxially corresponds to a third threaded hole.

[0012] Preferably, the connecting member comprises: a threaded sleeve threadedly connected to the outer peripheral side of the hollow tube, and the first connecting section and the second connecting section are both threadedly connected to the threaded sleeve.

[0013] Preferably, the rear end of the hollow tube is connected to an electric slip ring, and the electric slip ring is used to assist the wind turbine pitch cable to pass through the hollow tube.

[0014] Preferably, an aluminum alloy tube is arranged inside the hollow tube, and the outer peripheral side surface of the aluminum alloy tube is in contact with the inner wall of the hollow tube.

[0015] Compared with the above-mentioned background technology, the utility model provides a wind power gearbox assembly which is easy to separate and reinstall on the tower. By dividing the hollow tube into a first connecting section and a second connecting section, when the low-speed large gear assembly is damaged, the first connecting section and the second connecting section are separated, thereby reducing the spatial distance that the low-speed large gear assembly moves to the output end when it is removed, and effectively solving the problem that the low-speed large gear assembly cannot be completely disassembled due to the limitation of the hollow tube structure. Therefore, only a small crane is needed to assist in lifting the low-speed large gear assembly to the bottom of the tower for repair or replacement, and there is no need to lower the gearbox as a whole from the tower for repair, thereby effectively reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] FIG1 is a schematic diagram of a hollow tube installation in the prior art;

[0018] FIG2 is a schematic diagram of the installation of a hollow tube provided in an embodiment of the utility model;

[0019] FIG3 is a cross-sectional schematic diagram of a first embodiment of the utility model;

[0020] FIG4 is a cross-sectional schematic diagram of a second embodiment of the present utility model;

[0021] FIG5 is a cross-sectional schematic diagram of a third embodiment of the present utility model.

[0022] Specifically, 1-main shaft; 2-planet carrier; 3-sun gear; 4-low-speed large gear assembly; 401-secondary large shaft; 402-secondary large gear; 5-hollow tube; 501-first connecting section; 502-second connecting section; 6-aluminum alloy tube; 7-bolt sleeve; 8-first threaded hole; 9-first flange; 10-second flange; 11-second threaded hole; 12-third threaded hole; 13-threaded sleeve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] As shown in FIG2 , a wind power gearbox assembly that is easy to separate and reinstall on a tower includes: a planetary frame 2, one side of the planetary frame 2 is connected to the main shaft 1, one side of the planetary frame 2 is connected to the hollow tube 5 through a flange, and the hollow tube 5 passes through the sun gear 3 and the low-speed large gear assembly 4; the hollow tube 5 is divided into a first connecting section 501 and a second connecting section 502. By dividing the hollow tube 5 into the first connecting section 501 and the second connecting section 502, when the low-speed large gear assembly 4 is damaged, the first connecting section 501 and the second connecting section 502 are separated, and the low-speed large gear assembly 4 is further removed, which effectively solves the problem that the low-speed large gear assembly 4 cannot be completely disassembled due to the structural limitations of the hollow tube 5. Among them, the low-speed large gear assembly 4 includes: a secondary large shaft 401 and a secondary large gear 402 integrally arranged with the secondary large shaft 401. The damage in the low-speed large gear assembly 4 includes but is not limited to the damage of the secondary large shaft and the secondary large gear tooth surface and other components.

[0026] The first connecting section 501 and the second connecting section 502 are fixedly connected by a connecting member, and the inner wall of the connecting member fits the outer wall of the hollow tube 5. After the low-speed large gear assembly 4 is replaced, the first connecting section 501 and the second connecting section 502 are connected together by the connecting member to complete the repair or replacement of the low-speed large gear assembly 4.

[0027] As shown in FIG3 , in the first embodiment of the utility model, the connecting member includes: a bolt sleeve 7 sleeved on the outer peripheral side of the hollow tube 5, the bolt sleeve 7 is directly sleeved on the end of the first connecting section 501 and the end of the second connecting section 502, and the first connecting section 501 and the second connecting section 502 are fixedly connected together. A first marking position can be set on the outer peripheral side of the first connecting section 501, and the distance from the first marking position to one of the end faces of the first connecting section 501 is recorded as L1, and a second marking position is set on the outer peripheral side of the second connecting section 502, and the distance from the second marking position to one of the end faces of the second connecting section 502 is recorded as L2, then the length of the bolt sleeve 7 is recorded as L3, wherein the numerical value of L3 is the sum of the numerical values ​​of L1 and L2, and the numerical values ​​of L1 and L2 are equal.

[0028] Among them, a plurality of first threaded holes 8 are arranged in an array on the outer peripheral side of the bolt sleeve 7, and each first threaded hole 8 is connected to a bolt rod, and one end of the bolt rod abuts against the outer peripheral side of the hollow tube 5. The bolt rod is rotated forward, and the bolt rod gradually enters the first threaded hole 8 until one end of the bolt rod abuts against the outer wall of the hollow tube 5, completing the fixed connection between the first connecting section 501 and the second connecting section 502.

[0029] As shown in Figure 4, in the second embodiment of the utility model, the connecting component includes: a first flange 9 and a second flange 10 arranged on the outer peripheral side of the hollow tube 5, the first flange 9 is sleeved at one end of the first connecting section 501, and the second flange 10 is sleeved at one end of the second connecting section 502. The first flange 9 and the second flange 10 are connected by a plurality of bolt rods, and the first connecting section 501 and the second connecting section 502 are connected by two flanges. Compared with the method of directly sleeve-connecting the first connecting section 501 and the second connecting section 502 with the bolt sleeve 7, the bending strength of the connection between the first connecting section 501 and the second connecting section 502 is improved, and the overall structural stability is better.

[0030] It should be noted that a plurality of second threaded holes 11 are arranged in an array on the outer peripheral side surface of the first flange 9 and the outer peripheral side surface of the second flange 10, and a plurality of third threaded holes 12 are arranged in an array on one end of the first connecting section 501 and one end of the second connecting section 502, and each second threaded hole 11 coaxially corresponds to a third threaded hole 12. The bolt rod thread coaxially connects the second threaded hole 11 and the third threaded hole 12, which can avoid relative displacement in the axial direction, and at the same time avoid relative rotation between the first connecting section 501 and the second connecting section 502, further ensuring the connection strength of the first connecting section 501 and the second connecting section 502.

[0031] As shown in FIG5 , in the third embodiment of the utility model, the connecting member includes: a threaded sleeve 13 threadedly connected to the outer peripheral side of the hollow tube 5, the middle part of the threaded sleeve 13 is located at the connection position of the first connecting section 501 and the second connecting section 502, the end of the first connecting section 501 and the end of the second connecting section 502 are both provided with threaded lines, and the first connecting section 501 and the second connecting section 502 are both threadedly connected to the threaded sleeve 13, and the first connecting section 501 and the second connecting section 502 are directly connected by relatively rotating the threaded sleeve 13. Under the premise of ensuring the connection strength, the overall structure is simpler and the reinstallation of the hollow tube 5 is more convenient.

[0032] In one embodiment of the utility model, the rear end of the hollow tube 5 is connected to an electric slip ring (not shown in the figure), that is, a wind power slip ring. The electric slip ring is used to assist the wind turbine pitch cable to pass through the hollow tube 5. When the hollow tube 5 rotates, the wind turbine pitch cable in the electric slip ring is stationary, which plays a role in protecting the wind turbine pitch cable. The electric slip ring is a relatively mature prior art in the field of wind power generation technology, so it will not be described in detail.

[0033] Among them, an aluminum alloy tube 6 is arranged in the hollow tube 5, and the outer wall of the aluminum alloy tube 6 is in contact with the inner wall of the hollow tube 5. The arrangement of the aluminum alloy tube 6 prevents oil leakage from the hollow tube and avoids contact between the lubricating oil and the electric slip ring, which causes the electric slip ring to burn out, thereby playing a role in protecting the electric slip ring.

[0034] In one embodiment of the utility model, after the hollow tube 5 is cut into the first connecting section 501 and the second connecting section 502, the end face of the first connecting section 501 and the end face of the second connecting section 502 need to be polished to ensure that the cross section is smooth and free of burrs, so as to ensure that when the first connecting section 501 and the second connecting section 502 are reassembled and connected, the gap at the junction of the end face of the first connecting section 501 and the end face of the second connecting section 502 is reduced as much as possible, thereby preventing oil leakage at the cutting position.

[0035] In addition, a positioning hole can be opened on the end face of the first connecting section 501 by drilling, and a plurality of positioning holes are arranged in an array on the end face of the first connecting section 501. A positioning protrusion is integrally provided on the end face of the second connecting section 502 by welding, and a plurality of positioning protrusions are arranged in an array on the end face of the second connecting section 502, wherein each positioning protrusion is connected to a corresponding positioning hole, and the positioning protrusion and the positioning hole are connected to each other by being snap-fitted, so that the first connecting section 501 and the second connecting section 502 can be quickly docked, and the connection stability is better.

[0036] When the utility model is used, after the low-speed large gear assembly 4 is damaged, the first connecting section 501 and the second connecting section 502 are separated, the low-speed large gear assembly 4 is removed, and the low-speed large gear assembly 4 is assisted to be lifted to the bottom of the tower by a crane for repair or replacement. After the repair or replacement is completed, the low-speed large gear assembly 4 is assisted to be lifted to the top of the tower by a crane, and the first connecting section 501 and the second connecting section 502 are butt-connected by a connecting member to complete the reinstallation of the hollow tube 5 and the low-speed large gear assembly 4.

[0037] In summary, by dividing the hollow tube 5 into the first connecting section 501 and the second connecting section 502, the low-speed large gear assembly 4 can be removed separately. Only a small crane is needed to assist in lifting the low-speed large gear assembly 4 to the bottom of the tower for repair or replacement. There is no need to lower the entire gear box from the tower for repair, which effectively reduces the maintenance cost.

[0038] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A wind turbine gearbox assembly that is easy to separate and reinstall on a tower, characterized in that: include: A planet carrier, one side of which is connected to the main shaft, one side of which is connected to a hollow tube via a flange, and the hollow tube passes through a sun gear and a low-speed large gear assembly; The hollow tube is divided into a first connecting section and a second connecting section, the first connecting section and the second connecting section are fixedly connected by a connecting member, and the inner wall of the connecting member is in contact with the outer wall of the hollow tube.

2. A wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 1, characterized in that: The connecting component includes: a bolt sleeve sleeved on the outer peripheral side of the hollow tube, and the middle part of the bolt sleeve is located at the connecting position of the first connecting section and the second connecting section.

3. A wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 2, characterized in that: A plurality of first threaded holes are arranged in an array on the outer peripheral side surface of the bolt sleeve, each of the first threaded holes is connected to a bolt rod, and one end of the bolt rod abuts against the outer wall of the hollow tube.

4. The wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 1, characterized in that: The connecting component includes: a first flange and a second flange arranged on the outer peripheral side of the hollow tube, the first flange is sleeved at one end of the first connecting section, the second flange is sleeved at one end of the second connecting section, and the first flange and the second flange are connected by a plurality of bolt rods.

5. A wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 4, characterized in that: The outer peripheral side surfaces of the first flange and the second flange are both arranged with a plurality of second threaded holes in an array, one end of the first connecting section and one end of the second connecting section are both arranged with a plurality of third threaded holes in an array, and each second threaded hole coaxially corresponds to a third threaded hole.

6. The wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 1, characterized in that: The connecting member comprises: a threaded sleeve threadedly connected to the outer peripheral side of the hollow tube, and the first connecting section and the second connecting section are both threadedly connected to the threaded sleeve.

7. The wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 1, characterized in that: The rear end of the hollow tube is connected to an electric slip ring, and the electric slip ring is used to assist the wind turbine pitch cable to pass through the hollow tube.

8. The wind turbine gearbox assembly that is easy to separate and reinstall on a tower according to claim 7, characterized in that: An aluminum alloy tube is arranged inside the hollow tube, and the outer peripheral side surface of the aluminum alloy tube is in contact with the inner wall of the hollow tube.

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