Gearbox and gear for wind turbine gear

Abstract

The present application provides a gearbox and a wind turbine turning gear, wherein the gearbox comprises a first housing, a second housing, a first planetary transmission mechanism and a second planetary transmission mechanism. The first housing has an input end assembly. The second housing has an output end assembly. The first planetary transmission mechanism is disposed in the input end assembly and is used for transmission connection with a motor capable of inputting torque. The second planetary transmission mechanism is disposed in the output end assembly, the first planetary transmission mechanism is transmission-connected with the second planetary transmission mechanism, and the second planetary transmission mechanism is used for connection with a wind turbine main gearbox, thereby transmitting the torque input by the motor to the wind turbine main gearbox. Under the premise of meeting high power and high torque requirements, the structure is compact, the size is small, the weight is light, the assembly and disassembly is convenient, and the operation difficulty is low, which is beneficial to the installation and maintenance of wind turbines, improves efficiency, and reduces operation costs.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery, and in particular to a gear box and a winch for a wind turbine winch. Background Art

[0002] Wind farm wind turbines have small installation space, high power, large assembly torque, and difficult operation, difficult hoisting, and difficult disassembly and assembly. A series of difficult problems have become the main reasons restricting the efficiency of wind turbine installation and maintenance. Currently, the gearboxes on the market are mostly parallel-axis or bulky multi-stage transmission gearboxes with large volumes, which have many problems such as difficult disassembly and assembly, large space occupation, and low power density.

[0003] The inventor has found that the existing turning gearbox has the following disadvantages:

[0004] Large size, difficult to disassemble and assemble, and difficult to operate. Summary of the invention

[0005] The purpose of the present invention is to provide a gearbox and a winch for a wind turbine winch, which have a compact structure, high power density, low manufacturing cost, and can withstand high power and high output torque. At the same time, they are light in weight and small in size, easy to disassemble and assemble, and easy to hoist, with low operating difficulty.

[0006] The embodiment of the present invention is achieved as follows:

[0007] In a first aspect, the present invention provides a gearbox for a wind turbine, comprising:

[0008] A first housing having an input end portion;

[0009] A second housing having an output end, wherein the first housing and the second housing are connected;

[0010] A first planetary transmission mechanism, wherein the first planetary transmission mechanism is disposed in the input end portion;

[0011] and a second planetary transmission mechanism, wherein the second planetary transmission mechanism is arranged in the output end device, and the first planetary transmission mechanism is transmission-connected with the second planetary transmission mechanism;

[0012] Wherein, the first planetary transmission mechanism is used to connect with the motor; the second planetary transmission mechanism is used to connect with the wind power main gearbox.

[0013] In an optional embodiment, the first housing includes a first end cover, an outer housing, and a second end cover, wherein the first end cover and the second end cover are respectively sealed and connected to opposite ends of the outer housing; the first end cover is used to assemble the motor; and the second end cover is provided with a first bearing hole;

[0014] The second shell includes a front casing, an inner gear ring and an output box flange, and the front casing and the output box flange are respectively connected to the opposite ends of the inner gear ring; the front casing is provided with a second bearing hole; the second end cover is detachably connected to the front casing, and the first bearing hole is communicated with the second bearing hole; the output box flange is used to be connected to the fan frame.

[0015] In an optional embodiment, an oil sealing plate connected to the first end cover is provided at the end of the first bearing hole.

[0016] In an optional embodiment, the first planetary transmission mechanism includes an input gear, a transmission gear and a sun gear, the input gear is used to connect to the output shaft of the motor; the transmission gear is connected to the first end cover via a bearing; the sun gear includes a first shaft section and a second shaft section, the first shaft section is statically connected to the transmission gear via an internal spline; the second shaft section is inserted into the second bearing hole; the second shaft section is provided with a tooth portion, and the tooth portion is meshed with the second planetary transmission mechanism.

[0017] In an optional embodiment, the transmission gear is connected to the first end cover via a bearing.

[0018] In an optional embodiment, the second planetary transmission mechanism includes a planet carrier and a planet wheel, the planet carrier is connected to the front housing via a bearing; the planet wheel is rotatably connected to the planet carrier, and the planet wheel is meshed with the inner gear ring and the tooth portion at the same time;

[0019] The output housing flange is provided with a third bearing hole, a portion of the planet carrier is passed through the third bearing hole, and the planet carrier is used for transmission connection with the wind power main gear box.

[0020] In an optional embodiment, the planet carrier is connected to the front housing via a bearing; the planet carrier is connected to the output housing flange via a bearing.

[0021] In an optional embodiment, the planetary carrier includes a main frame, a pin shaft and a connecting bearing, the main frame is rotatably connected to the front housing and the output box flange at the same time, the pin shaft is fixed to the main frame, and the planetary gear is rotatably connected to the pin shaft through the connecting bearing; the second shaft segment passes through the main frame.

[0022] In an optional embodiment, the output housing flange has a plurality of connection portions.

[0023] In a second aspect, the present invention provides a turning gear, the turning gear comprising:

[0024] A plurality of motors and a wind turbine vehicle gearbox according to any one of the aforementioned embodiments, wherein the plurality of motors are all arranged on the first housing, and the plurality of motors are all transmission-connected to the first planetary transmission mechanism.

[0025] The beneficial effects of the embodiments of the present invention are:

[0026] In summary, the wind turbine gearbox provided in this embodiment is used to assist the installation and maintenance of the wind turbine. When in use, the gearbox is hoisted to the location of the wind turbine, and then the second housing is connected to the frame of the wind turbine, and the second planetary transmission mechanism is connected to the main wind turbine gearbox. A motor is arranged on the first housing, and the first planetary transmission mechanism is driven by the motor to move, so that the torque is transmitted to the second planetary transmission mechanism through the first planetary transmission mechanism, and finally input into the main wind turbine gearbox. Since the gearbox adopts a two-stage planetary transmission, it can achieve a high torque and a high speed ratio output under the premise of a compact appearance, and achieve a high power density ratio. At the same time, compared with the traditional gearbox, the volume is reduced by about 50%, and the weight is reduced by about 30%, which greatly meets the actual needs of the wind farm. At the same time, the gearbox adopts a double planetary design, and the entire installation input and output installation surface is completely evenly distributed in the middle. No matter where the gearbox is sent to the workstation, it can be installed at the minimum rotation angle, which has a great positive effect on the maintenance and installation efficiency of the wind turbine, shortens the installation time, reduces the installation difficulty, and improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic structural diagram of a gearbox for a wind turbine in an embodiment of the present invention;

[0029] Figure 2 The figure is a schematic cross-sectional view of a gearbox for a wind turbine according to an embodiment of the present invention.

[0030] icon:

[0031] 001-first bearing; 002-second bearing; 003-third bearing; 004-fourth bearing; 005-fifth bearing; 100-first housing; 110-input end mount; 120-first end cover; 121-assembly hole; 130-outer housing; 140-second end cover; 150-first oil seal plate; 200-second housing; 210-output end mount; 220-front housing; 230-inner gear ring; 240-output housing flange; 250-second oil seal plate; 300-first planetary transmission mechanism; 310-input gear; 320-transmission gear; 330-sun gear; 400-second planetary transmission mechanism; 410-planet carrier; 411-main frame; 412-pin shaft; 420-planetary gear. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] At present, due to the small installation space of wind farm wind turbines and the high-altitude operations, the gearbox used for wind turbine installation and maintenance is difficult to assemble with the wind turbine. Under the premise of meeting high power and high torque, the gearbox is large in size, difficult to hoist, and very inconvenient to disassemble and assemble, which greatly limits the efficiency of wind turbine installation and maintenance and greatly increases the cost.

[0039] In view of this, the designers designed a gearbox for wind turbine disc vehicles. While meeting the requirements of high power and high torque, it has a compact structure, small size, light weight, easy disassembly and assembly, and low operation difficulty. It is conducive to wind turbine installation and maintenance operations, improves efficiency, and reduces operating costs.

[0040] See also Figure 1 and Figure 2 In this embodiment, the wind turbine gearbox includes a first housing 100, a second housing 200, a first planetary transmission mechanism 300 and a second planetary transmission mechanism 400. The first housing 100 has an input end assembly 110. The second housing 200 has an output end assembly 210. The first planetary transmission mechanism 300 is disposed in the input end assembly 110 and is used for transmission connection with a motor capable of inputting torque. The second planetary transmission mechanism 400 is disposed in the output end assembly 210, the first planetary transmission mechanism 300 is transmission connected with the second planetary transmission mechanism 400, and the second planetary transmission mechanism 400 is used for connection with a wind turbine main gearbox, so as to transmit the torque input by the motor to the wind turbine main gearbox.

[0041] The wind turbine gearbox provided in this embodiment is used to assist in the installation and maintenance of the wind turbine. When in use, the gearbox is hoisted to the location of the wind turbine, and then the second housing 200 is connected to the frame of the wind turbine, and the second planetary transmission mechanism 400 is connected to the main wind turbine gearbox. A motor is arranged on the first housing 100, and the first planetary transmission mechanism 300 is driven by the motor to move, so that the torque is transmitted to the second planetary transmission mechanism 400 through the first planetary transmission mechanism 300, and finally input into the main wind turbine gearbox. Since the gearbox adopts a two-stage planetary transmission, it can achieve high torque and high speed ratio output under the premise of compact appearance, achieving a higher power density ratio. At the same time, compared with the traditional gearbox, the volume is reduced by about 50% and the weight is reduced by about 30%, which greatly meets the actual needs of the wind farm. At the same time, the gearbox adopts a double planetary design, and the entire installation input and output installation surface is completely evenly divided in the middle. No matter from which position the gearbox is sent to the work station, it can be installed at the smallest rotation angle, which has a great positive effect on the maintenance and installation efficiency of the fan, shortens the installation time, reduces the installation difficulty, and improves work efficiency.

[0042] In this embodiment, it should be noted that the number of motors can be one or more. When the number of motors is multiple, the multiple motors are connected to the first planetary transmission mechanism 300 and can work together to enable the first planetary transmission mechanism 300 to transmit torque. Of course, the number of motors to be started can be selected as needed, so as to reduce energy consumption, save energy, and be more environmentally friendly while meeting the torque requirement.

[0043] In this embodiment, optionally, the first housing 100 includes a first end cover 120, an outer housing 130, and a second end cover 140. The first end cover 120 and the second end cover 140 are both circular covers, and the outer housing 130 is a circular ring structure. The first end cover 120 and the second end cover 140 are respectively arranged at both ends of the outer housing 130, and the first end cover 120 and the outer housing 130 can be fixedly connected by bolts; the second end cover 140 and the outer housing 130 can be fixedly connected by bolts. The first end cover 120, the outer housing 130 and the second end cover 140 are coaxially arranged. At the same time, the first end cover 120 is penetrated with assembly holes 121 that are all connected to the input end assembly 110. The assembly holes 121 are through holes, and the number of assembly holes 121 corresponds to the number of motors, that is, multiple motors are connected to the first end cover 120, and the output shaft of each motor is passed through the corresponding assembly hole 121, so as to facilitate connection with the first planetary transmission mechanism 300. The first end cover 120 is a circular through hole, which is coaxially arranged with the first end cover 120. The first oil seal plate 150 is arranged on the outer side of the first end cover 120. The second end cover 140 is provided with a first bearing hole in the middle, which is a circular through hole and coaxially arranged with the second end cover 140.

[0044] Optionally, the first planetary transmission mechanism 300 includes an input gear 310, a transmission gear 320 and a sun gear 330. The number of input gears 310 is equal to the number of assembly holes 121 and corresponds one to one. During assembly, each input gear 310 is fixed to the output shaft of the corresponding motor. For example, the fixing of the input gear 310 to the output shaft of the motor can be achieved by a baffle and a bolt. Specifically, the input gear 310 is sleeved outside the corresponding output shaft, the baffle is attached to the side of the input gear 310 away from the output shaft, and the baffle is penetrated by a bolt and screwed on the output shaft. It should be understood that after the input gear 310 is connected to the output shaft of the motor, the input gear 310 and the output shaft of the motor are relatively fixed in the circumferential direction of the output shaft, that is, the input gear 310 can rotate together with the rotation of the output shaft of the motor. The transmission gear 320 is rotatably connected to the first end cover 120 through the first bearing 001, and the bearing is arranged inside. In addition, the transmission gear 320 is coaxially arranged with the first end cover 120. The plurality of input gears 310 are all meshed with the transmission gear 320. The sun gear 330 includes a first shaft section and a second shaft section which are coaxially arranged, and the second shaft section is provided with a tooth portion. The first shaft section is inserted into the transmission gear 320 and is coaxially arranged with the transmission gear 320. The transmission gear 320 and the first shaft section can be connected by an internal spline to achieve torque transmission, that is, after the transmission gear 320 is connected to the first shaft section, the sun gear 330 can rotate with the rotation of the transmission gear 320.

[0045] It should be understood that when input torque is required, a set number of motors are selected to be in the starting state as needed, the motor drives the corresponding input gear 310 to rotate, the output gear drives the transmission gear 320 to rotate, and thus drives the sun gear 330 to rotate. The sun gear 330 can transmit the torque to the second planetary transmission mechanism 400.

[0046] Furthermore, a second bearing 002 is provided in the first bearing hole, and the first shaft segment or the second shaft segment passes through the first bearing hole and is rotatably connected to the second end cover 140 through the second bearing 002, so that the transmission of the first planetary transmission mechanism 300 is more stable and reliable.

[0047] In this embodiment, the second housing 200 includes a front housing 220, an inner gear ring 230 and an output housing flange 240. The front housing 220 is a circular plate, and the output housing flange 240 is a flange structure. The front housing 220 is provided with a second bearing hole, which is a circular through hole, and the second bearing hole is detachably connected to the front housing 220. A third bearing hole is provided on the output housing flange 240, and the front housing 220, the inner gear ring 230 and the output housing flange 240 can be fixedly connected by bolts and pins, and the second bearing hole and the third bearing hole are connected coaxially. It should be understood that the front housing 220 is detachably connected to the second end cover 140, and the weight is light after disassembly, which is convenient for hoisting and assembly. The front housing 220 and the second end cover 140 can be detachably connected by bolts and pins. The pin is mainly used for positioning.

[0048] Optionally, the second planetary transmission mechanism 400 includes a planet carrier 410 and a planetary gear 420, and the planet carrier 410 is rotatably connected to the front housing 220 through the third bearing 003. The third bearing 003 is fixed in the second bearing hole, and part of the planet carrier 410 is inserted in the inner ring of the third bearing 003, and the planet carrier 410 is coaxially arranged with the front housing 220. Specifically, the planet carrier 410 includes a main frame 411 and a pin 412, and the main frame 411 is connected to the third bearing 003. The main frame 411 is provided with an avoidance hole, and the avoidance hole is coaxial with the second bearing hole. The number of the pins 412 is set as needed, and the pins 412 are fixed on the main frame 411. When the number of the pins 412 is multiple, the multiple pins 412 are evenly spaced and arranged around the axis of the avoidance hole. Each pin 412 is sleeved with a fourth bearing 004, and each fourth bearing 004 is sleeved with a planetary gear 420. The second shaft section of the sun gear 330 passes through the second bearing hole and the avoidance hole, and each planetary gear 420 is meshed with the teeth on the inner gear ring 230 and the second shaft section at the same time. Part of the main frame 411 is inserted into the third bearing hole on the output housing flange 240, and a fifth bearing 005 is arranged in the third bearing hole. The main frame 411 is rotatably connected to the output housing flange 240 through the fifth bearing 005. The main frame 411 is used for transmission connection with the shaft of the fan. Optionally, the output housing flange 240 has a plurality of connection parts, and the plurality of connection parts are evenly spaced around the planetary frame.

[0049] Furthermore, a second oil sealing plate 250 is disposed on the outer side of the third bearing hole.

[0050] The wind turbine vehicle gearbox provided in this embodiment, the first housing 100, the input gear 310 and the transmission gear 320 can constitute the first part, the second housing 200, the sun gear 330, the planetary carrier 410, the planetary gear 420 can constitute the second part, the first part and the second part are detachably connected, that is, the first housing 100 and the second housing 200 are detachably connected, and after the first part and the second part are connected, the first shaft section of the sun gear 330 can pass through the first bearing hole and be circumferentially limited and connected with the transmission gear 320 through the internal spline. In this way, the gearbox can be disassembled into two parts during hoisting, each part is light in weight, easy to hoist, and reduces the difficulty of operation. At the same time, after the gearbox is disassembled, each part is independently set, and each part has an oil seal, which is not easy to leak oil.

[0051] This embodiment further provides a turning gear, comprising a motor and the wind turbine turning gear gearbox of the above embodiment. The motor is connected to the first end cover 120 of the first housing 100 , and the motor is used to input torque to the first planetary transmission mechanism 300 .

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind turbine gearbox, characterized in that: include: A first housing having an input end portion; A second housing having an output end, wherein the first housing and the second housing are connected; A first planetary transmission mechanism, wherein the first planetary transmission mechanism is disposed in the input end portion; and a second planetary transmission mechanism, wherein the second planetary transmission mechanism is arranged in the output end device, and the first planetary transmission mechanism is transmission-connected with the second planetary transmission mechanism; Wherein, the first planetary transmission mechanism is used to connect with the motor; the second planetary transmission mechanism is used to connect with the wind power main gearbox; The first housing includes a first end cover, an outer housing, and a second end cover, wherein the first end cover and the second end cover are respectively sealed and connected to two opposite ends of the outer housing; the first end cover is used to assemble the motor, and a plurality of assembly holes are provided on the first end cover; the second end cover is provided with a first bearing hole; The second housing comprises a front housing, an inner gear ring and an output housing flange, wherein the front housing and the output housing flange are respectively connected to opposite ends of the inner gear ring; the front housing is provided with a second bearing hole; the second end cover is detachably connected to the front housing, and the first bearing hole is communicated with the second bearing hole; the output housing flange is used to be connected to the fan frame; The first planetary transmission mechanism includes a plurality of input gears, a transmission gear and a sun gear, wherein the plurality of input gears are respectively used for correspondingly connecting with the output shafts of a plurality of motors; the transmission gear is connected to the first end cover via a bearing; the sun gear includes a first shaft section and a second shaft section, wherein the first shaft section is statically connected to the transmission gear via an internal spline; the second shaft section is passed through the second bearing hole; the second shaft section is provided with a tooth portion, and the tooth portion is meshed with the second planetary transmission mechanism.

2. The wind turbine gearbox according to claim 1, characterized in that: An oil sealing plate connected to the first end cover is provided at the end of the first bearing hole.

3. The wind turbine gearbox according to claim 1, characterized in that: The transmission gear is connected to the first end cover via a bearing.

4. The wind turbine gearbox according to claim 1, characterized in that: The second planetary transmission mechanism comprises a planet carrier and a planetary gear, wherein the planet carrier is connected to the front housing via a bearing; the planetary gear is rotatably connected to the planet carrier, and the planetary gear is meshed with the inner gear ring and the toothed portion at the same time; The output housing flange is provided with a third bearing hole, a portion of the planet carrier is passed through the third bearing hole, and the planet carrier is used for transmission connection with the wind power main gear box.

5. The wind turbine gearbox according to claim 4, characterized in that: The planet carrier is connected to the front housing via a bearing; the planet carrier is connected to the output housing flange via a bearing.

6. The wind turbine gearbox according to claim 4, characterized in that: The planetary frame includes a main frame, a pin and a connecting bearing. The main frame is rotatably connected to the front housing and the output box flange at the same time. The pin is fixed to the main frame. The planetary gear is rotatably connected to the pin through the connecting bearing. The second shaft section runs through the main frame.

7. The wind turbine gearbox according to claim 1, characterized in that: The output box flange has a plurality of connection parts.

8. A turning wheel, characterized in that: The turning gear comprises: A plurality of motors and a gearbox for a wind turbine vehicle according to any one of claims 1 to 7, wherein the plurality of motors are all arranged on the first housing, and the plurality of motors are all transmission-connected to the first planetary transmission mechanism.

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