Transmission chain structure and wind generating set

Abstract

The invention provides a transmission chain structure and a wind generating set, and relates to the technical field of wind power hydraulic variable pitch. The transmission chain structure comprises a hub provided with a first containing cavity; the mounting support is connected with a chassis of the cabin; and the force transmission cylinder is rotationally arranged in the mounting support, the force transmission cylinder is connected with the hub, the force transmission cylinder and the hub synchronously rotate, and the force transmission cylinder is provided with a second containing cavity. Parts of the hydraulic variable-pitch system are integrated in the force transmission cylinder and the hub, the force transmission cylinder and the hub rotate synchronously, and a high-pressure oil-electric slip ring connecting the rotating hub and a static cabin is not needed to transmit hydraulic power, so that a leakage path caused by abrasion of a sealing surface of the high-pressure oil-electric slip ring is eliminated by canceling the high-pressure oil-electric slip ring. And meanwhile, part of components of the hydraulic variable pitch system are arranged in the force transmission cylinder, so that the occupied space of the hub is reduced, and the operation and maintenance space of the hub is expanded.

Description

Technical Field

[0001] This application relates to the technical field of wind power hydraulic pitch control, and particularly to a drive chain structure and a wind turbine generator set. Background Art

[0002] The drive chain structure of a wind turbine generator set includes a hub, a main shaft, and a power generation system. The hub is connected to the power generation system (such as a gearbox or a generator) through the main shaft. The main shaft and the power generation system are both arranged in the nacelle. The hub is used to install blades. The wind drives the blades to rotate, and the rotation of the hub is transmitted to the power generation system through the main shaft, thereby converting mechanical energy into electrical energy. The hydraulic pitch control system is a control system in a wind turbine generator set that adjusts the angle between the blade and the wind direction through hydraulic drive. For example, the actuators (such as oil cylinders, high-pressure accumulators, and valve groups) of the hydraulic pitch control system are built into the hub and directly drive the blade to rotate around its axis to adjust the angle between the blade and the wind direction. The power sources (hydraulic stations and high-pressure oil-electric slip rings) of the hydraulic pitch control system are usually arranged in the nacelle, and the power sources of the hydraulic oil are transmitted through the high-pressure oil-electric slip ring to drive the actuators in the hub to move.

[0003] In the prior art, due to the decentralized layout of the hydraulic pitch control system, the high-pressure oil-electric slip ring has seal wear due to long-term rotational friction, resulting in leakage problems. With the increase of wind power generation power, the hub increases, and the layout of the hydraulic pitch control system is changed to a centralized layout, that is, all components of the hydraulic pitch control system are centrally arranged in the hub, eliminating the high-pressure oil-electric slip ring.

[0004] However, the centralized layout will occupy a large amount of space in the hub, reducing the maintenance space in the hub and making it inconvenient to maintain the hub. Summary of the Invention

[0005] This application provides a drive chain structure and a wind turbine generator set to solve the problem that the centralized layout will occupy a large amount of space in the hub, reducing the maintenance space in the hub and making it inconvenient to maintain the hub.

[0006] To achieve the above object, the technical solution of this application is as follows:

[0007] On the one hand, this application provides a drive chain structure, including: a hub with a first accommodation cavity therein; a mounting support for connecting to the chassis of the nacelle; a force transmission cylinder rotatably arranged in the mounting support, the force transmission cylinder being used for connecting to the hub and rotating synchronously with the hub, the force transmission cylinder having a second accommodation cavity therein, the first accommodation cavity and the second accommodation cavity being communicated, the second accommodation cavity being used for installing at least one of an accumulator, an oil tank, a pump set, a pitch valve group, and a distribution valve group of the hydraulic pitch control system, and the first accommodation cavity being used for installing an oil cylinder of the hydraulic pitch control system.

[0008] In a possible implementation, the transmission chain structure in the embodiment of the present application also includes a first rotating member, which is spaced apart on the force transmission cylinder, one end of the force transmission cylinder is connected to the wheel hub through the first rotating member, and the first rotating member is rotatably set on the mounting support.

[0009] In one possible implementation, in the transmission chain structure in the embodiment of the present application, the first rotating member includes a first bearing and a second bearing, the inner rings of the first bearing and the second bearing are sequentially mounted on the force transmission cylinder, the outer rings of the first bearing and the second bearing are fixedly connected to the mounting support, and the inner rings of the first bearing and the second bearing rotate around the axis of the wheel hub relative to the mounting support.

[0010] In a possible implementation, in the transmission chain structure in the embodiment of the present application, the balls of the first bearing are arranged longitudinally, and the balls of the second bearing are arranged transversely.

[0011] In a possible implementation, the transmission chain structure in the embodiment of the present application also includes a first planetary gear system and a second rotating member, the first planetary gear system includes a planetary carrier, a fixed shaft, a planetary gear and a sun gear, the fixed shaft is set on the planetary carrier, the planetary gear is rotatably set on the fixed shaft, and the planetary gear is meshed with the sun gear; the second rotating member is connected to the end of the force transmission cylinder away from the hub, and the second rotating member is meshed with the planetary gear, and the second rotating member is rotatably set on the mounting support.

[0012] In one possible implementation, in the transmission chain structure in the embodiment of the present application, the second rotating member includes a third bearing and a ring gear, the third bearing has an inner ring and an outer ring, the inner ring of the third bearing is connected to the ring gear, the ring gear is meshed with the planetary gear, the outer ring of the third bearing is fixedly connected to the mounting support, and the inner ring of the third bearing rotates around the axis of the wheel hub relative to the mounting support.

[0013] In a possible implementation, in the transmission chain structure in the embodiment of the present application, the third bearing is a double-row cylindrical roller bearing, and the first planetary gear train is a duplex planetary gear train.

[0014] In a possible implementation, the transmission chain structure in the embodiment of the present application further includes a support member, one end of which is connected to the mounting bracket, and the other end of which is used to connect to the base frame.

[0015] In one possible implementation, in the transmission chain structure in the embodiment of the present application, the mounting support includes at least one mounting seat, the support member includes a first support rod and a second support rod, the first support rod is connected to the mounting seat, one end of the second support rod is connected to the first support rod, and the other end is connected to the base frame.

[0016] On the other hand, the present application further provides a wind turbine generator set, comprising a main body and a transmission chain structure in any one of the above embodiments arranged on the main body.

[0017] A drive chain structure and a wind turbine provided by the present application. The drive chain structure includes a hub with a first accommodation cavity therein; a mounting support for connecting with the chassis of the nacelle; a force transmission cylinder rotatably arranged in the mounting support, the force transmission cylinder being used for connecting with the hub and rotating synchronously with the hub, the force transmission cylinder having a second accommodation cavity therein, the first accommodation cavity and the second accommodation cavity being communicated, the second accommodation cavity being used for installing at least one of an accumulator, an oil tank, a pump set, a pitch valve set and a distribution valve set of a hydraulic pitch system, and the first accommodation cavity being used for installing an oil cylinder of the hydraulic pitch system. By integrating the components of the hydraulic pitch system into the force transmission cylinder and the hub, since the force transmission cylinder rotates synchronously with the hub, the power sources (such as accumulators, oil tanks, pump sets, pitch valve sets and distribution valve sets) of the hydraulic pitch system and the actuators (such as oil cylinders) are both in the synchronously rotating force transmission cylinder and hub, and there is no need to connect a high-pressure oil and electricity slip ring for rotating the hub and the stationary nacelle to transmit hydraulic power. Thus, by eliminating the high-pressure oil and electricity slip ring, the leakage path caused by the wear of the rotating interface sealing surface of the high-pressure oil and electricity slip ring is eliminated. At the same time, some components of the hydraulic pitch system are arranged in the force transmission cylinder, reducing the occupied space of the hub, thereby expanding the maintenance space of the hub and facilitating the maintenance and repair by operators. Description of the Drawings

[0018] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0019] Figure 1 It is a schematic structural diagram of the drive chain structure provided by the embodiment of the present application;

[0020] Figure 2 It is the structural schematic of the drive chain structure provided by the embodiment of the present application Figure 1 ;

[0021] Figure 3 It is the structural schematic of the drive chain structure provided by the embodiment of the present application Figure 2 ;

[0022] Figure 4 It is a schematic structural diagram of the hub provided by the embodiment of the present application;

[0023] Figure 5 It is a schematic structural diagram of the connection between the mounting seat and the support member provided by the embodiment of the present application;

[0024] Figure 6 It is a schematic structural diagram of the first planetary gear train provided by the embodiment of the present application.

[0025] Description of the Reference Numerals:

[0026] 100 - hub;

[0027] 200 - Mounting support; 210 - Mounting base;

[0028] 300 - Force transmission cylinder;

[0029] 400 - First rotating member; 410 - First bearing; 420 - Second bearing;

[0030] 500 - First planetary gear train; 510 - Planet carrier; 520 - Fixed shaft; 530 - Planet gear; 540 - Sun gear;

[0031] 600 - Second rotating member; 610 - Third bearing; 620 - Ring gear;

[0032] 700 - Support member; 710 - First support rod; 720 - Second support rod.

[0033] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed description of the specific embodiments

[0034] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0035] It should be noted that in the description of the embodiments of the present application, the terms indicating the orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. They are only for convenience of description and do not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present application.

[0036] In addition, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0037] In this application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The drive train structure of a wind turbine generator includes a hub, a main shaft, and a power generation system. The hub is connected to the power generation system such as a gearbox or a generator through the main shaft. The main shaft and the power generation system are both arranged in the nacelle. The hub is used to install blades. The wind drives the blades to rotate, driving the rotation of the hub, which is transmitted to the power generation system through the main shaft, thereby converting mechanical energy into electrical energy. The hydraulic pitch system is a control system in a wind turbine generator that adjusts the angle between the blade and the wind direction through hydraulic drive. For example, the actuators of the hydraulic pitch system such as cylinders, high-pressure accumulators, and valve groups are built inside the hub and directly drive the blade to rotate around its axis to adjust the angle between the blade and the wind direction. The power source hydraulic station and the high-pressure oil and electric slip ring of the hydraulic pitch system are usually arranged in the nacelle, and the power source of the hydraulic oil is transmitted through the high-pressure oil and electric slip ring to drive the actuator inside the hub to move.

[0039] It should be noted that the high-pressure oil and electric slip ring is a pipeline connecting the rotating part and the stationary part. Some components of the hydraulic pitch system are installed in the rotating hub, and some are installed in the stationary nacelle. A rotating pipeline, the high-pressure hydraulic slip ring, is needed to connect them in the middle. After long-term use, the rotating pipeline interface is prone to wear and oil leakage due to the rotating friction.

[0040] In the prior art, due to the long-term rotating friction of the high-pressure oil and electric slip ring in the decentralized layout of the hydraulic pitch system, there is a leakage problem caused by seal wear. With the increase of wind power generation, the hub becomes larger, and the layout of the hydraulic pitch system is changed to a centralized layout, that is, all components of the hydraulic pitch system are concentrated in the hub, eliminating the high-pressure oil and electric slip ring. However, the centralized layout will occupy a large amount of space in the hub, reducing the maintenance space of the hub and making the hub maintenance inconvenient.

[0041] In view of this, the present application provides a drive chain structure and a wind turbine generator set. The drive chain structure includes a hub having a first accommodation cavity therein; a mounting support for connecting to the chassis of the nacelle; a force transmission cylinder rotatably disposed within the mounting support, the force transmission cylinder being used to connect to the hub and rotate synchronously with the hub, the force transmission cylinder having a second accommodation cavity therein, the first accommodation cavity and the second accommodation cavity being in communication, the second accommodation cavity being used to mount at least one of an accumulator, an oil tank, a pump set, a pitch valve set, and a distribution valve set of the hydraulic pitch system, and the first accommodation cavity being used to mount a cylinder of the hydraulic pitch system. By integrating the components of the hydraulic pitch system within the force transmission cylinder and the hub, since the force transmission cylinder rotates synchronously with the hub, the power sources (such as accumulators, oil tanks, pump sets, pitch valve sets, and distribution valve sets) of the hydraulic pitch system and the actuators (such as cylinders) are within the rotating force transmission cylinder and hub, eliminating the need for a high-pressure oil and electricity slip ring that connects the rotating hub and the stationary nacelle to transmit hydraulic power. Thus, by eliminating the high-pressure oil and electricity slip ring, the leakage path caused by the wear of the rotating interface sealing surface of the high-pressure oil and electricity slip ring is eliminated. At the same time, some components of the hydraulic pitch system are disposed within the force transmission cylinder, reducing the occupied space of the hub, thereby expanding the maintenance space of the hub and facilitating the operation and maintenance of operators.

[0042] The following will be combined with Figures 1 to 6 specific embodiments to elaborate on the present application in detail.

[0043] On the one hand, the present application provides a drive chain structure, including: a hub 100 having a first accommodation cavity therein; a mounting support 200 for connecting to the chassis of the nacelle; a force transmission cylinder 300 rotatably disposed within the mounting support 200, the force transmission cylinder 300 being used to connect to the hub 100 and rotate synchronously with the hub 100, the force transmission cylinder 300 having a second accommodation cavity therein, the first accommodation cavity and the second accommodation cavity being in communication, the second accommodation cavity being used to mount at least one of an accumulator, an oil tank, a pump set, a pitch valve set, and a distribution valve set of the hydraulic pitch system, and the first accommodation cavity being used to mount a cylinder of the hydraulic pitch system.

[0044] The force transmission cylinder 300 is a hollow cylindrical structure to form an accommodation cavity 310 therein, and the depth of the accommodation cavity 310 can be designed according to actual situations. In addition, maintenance holes can also be provided on the force transmission cylinder 300 to facilitate the maintenance of the components of the hydraulic pitch system inside the force transmission cylinder 300. Since the first accommodation cavity and the second accommodation cavity are in communication, operators or maintenance machines can of course also enter the inside of the force transmission cylinder 300 from the hub 100 to maintain the components of the hydraulic pitch system.

[0045] The mounting support 200 is used to be set on the chassis. There are three bearings arranged on the mounting support. The three bearings are connected to the force transmission cylinder 300 to achieve the synchronous rotation of the force transmission cylinder 300 and the hub 100. The bearing has an inner ring and an outer ring. The inner ring of the bearing is sleeved on the force transmission cylinder 300. For the convenience of description, the three bearings are respectively named the first bearing 410, the second bearing 420 and the third bearing 610. The first bearing 410 and the second bearing 420 are sequentially arranged at one end of the force transmission cylinder 300 facing the hub 100. The inner ring of the first bearing 410 is sleeved on the force transmission cylinder 300, and this inner ring is connected to the hub 100 through a flange or directly connected to the hub 100, so that the force transmission cylinder 300 can rotate synchronously with the hub 100. The outer rings of the first bearing 410 and the second bearing 420 are both connected to the mounting support 200 and are rigidly connected to the mounting support 200. The outer rings of the first bearing 410 and the second bearing 420 do not rotate with the mounting support 200. The outer ring of the third bearing 610 is fixedly connected to the mounting support 200. The inner ring of the third bearing 610 is connected to the gear ring 620. The gear ring 620 rotates at the same speed as the inner ring of the third bearing 610. The gear ring 620 is connected to one end of the force transmission cylinder 300 facing away from the hub 100. The third bearing 610 can be a cylindrical roller bearing. The third bearing 610 can be a double bearing.

[0046] It can be understood that in this application, the force transmission cylinder 300 and the hub 100 rotate synchronously. The components of the hydraulic pitch system are integrated in the force transmission cylinder and the hub. The power source pump group of the hydraulic system and the actuator cylinder are both in the rotating force transmission cylinder 300 and the hub 100. There is no need to connect the high-pressure oil and electricity slip ring for transmitting hydraulic power between the rotating hub 100 and the stationary nacelle. Thus, by canceling the high-pressure oil and electricity slip ring, the leakage path caused by the wear of the sealing surface of the rotating interface of the high-pressure oil and electricity slip ring is eliminated. At the same time, some components of the hydraulic pitch system are arranged in the hub 100, reducing the occupied space of the hub 100, thereby expanding the operation and maintenance space of the hub 100 and facilitating the operation and maintenance and repair of the operators.

[0047] This application further includes a first rotating member 400. The first rotating member 400 is sleeved on the force transmission cylinder 300 at intervals. One end of the force transmission cylinder 300 is connected to the hub 100 through the first rotating member 400. The first rotating member 400 is rotatably arranged on the mounting support 200.

[0048] In this application, the first rotating member 400 realizes the rigid rotating connection between the hub 100 and the force transmission cylinder 300. The first rotating member 400 provides a rotating degree of freedom for the force transmission cylinder 300, enabling the force transmission cylinder 300 to rotate with the hub 100. The hydraulic pitch system is integrated inside the hub 100 and the force transmission cylinder 300, thus eliminating the high-pressure oil and electricity slip ring.

[0049] Among them, the first rotating member 400 includes a first bearing 410 and a second bearing 420, the inner rings of the first bearing 410 and the second bearing 420 are sequentially mounted on the force transmission cylinder 300, the outer rings of the first bearing 410 and the second bearing 420 are fixedly connected to the mounting support 200, and the inner rings of the first bearing 410 and the second bearing 420 rotate around the axis of the wheel hub 100 relative to the mounting support 200.

[0050] The balls of the first bearing 410 are arranged longitudinally, such as angular contact ball bearings, and are used to bear axial loads. The balls of the second bearing 420 are arranged transversely, such as deep groove ball bearings or cylindrical roller bearings, and are used to bear radial loads. The inner rings of the first bearing 410 and the second bearing 420 are both sleeved on the outer wall of the force transmission cylinder 300, and rotate with the force transmission cylinder 300. The outer rings of the first bearing 410 and the second bearing 420 are fixed to the mounting support 200 to form a rotating support interface. The present application optimizes the axial and radial stiffness of the force transmission cylinder 300 by combining different bearing types.

[0051] The present application also includes a first planetary gear system 500 and a second rotating member 600. The first planetary gear system 500 includes a planetary carrier 510, a fixed shaft 520, a planetary gear 530 and a sun gear 540. The fixed shaft 520 is arranged on the planetary carrier 510, and the planetary gear 530 is rotatably arranged on the fixed shaft 520, and the planetary gear 530 is meshed with the sun gear 540; the second rotating member 600 is connected to the end of the force transmission cylinder 300 away from the hub 100, and the second rotating member 600 is meshed with the planetary gear 530, and the second rotating member 600 is rotatably arranged on the mounting support 200.

[0052] The planet carrier 510 is connected to the mounting support 200, and has a fixed shaft 520 on the planet carrier 510. The planetary gear 530 is sleeved on the fixed shaft 520. The sun gear 540 is meshed with the planetary gear 530, and the planetary gear 530 is meshed with the ring gear 620. The force transmission cylinder 300 is connected to the ring gear 620. The rotation of the force transmission cylinder 300 drives the ring gear 620 to rotate, and the ring gear 620 drives the planetary gear 530 to rotate, and the planetary gear 530 drives the sun gear 540 to transmit.

[0053] Among them, the second rotating member 600 includes a third bearing 610 and a ring gear 620, the third bearing 610 has an inner ring and an outer ring, the inner ring of the third bearing 610 is connected to the ring gear 620, the ring gear 620 is meshed with the planetary gear 530, the outer ring of the third bearing 610 is fixedly connected to the mounting support 200, and the inner ring of the third bearing 610 rotates around the axis of the wheel hub 100 relative to the mounting support 200.

[0054] It should be noted that the force transmission cylinder 300 and the ring gear 620 are physically connected such as flange fixing or bolt fixing to form an integrated rotating structure without relative movement. The two are rigidly connected to achieve synchronous rotation, thereby transmitting power to the planetary gear system 500.

[0055] It can be understood that when the ring gear 620 is used as the input and the sun gear 540 is used as the output, the size of the force transmission cylinder 300 is relatively large, and the transmission between the two is realized by connecting the large ring gear 620 with the force transmission cylinder 300. The transmission process is as follows: the wind drives the blades to rotate, causing the hub 100 to rotate, thereby driving the force transmission cylinder 300 to rotate. The force transmission cylinder 300 drives the ring gear 620 to rotate synchronously. When the ring gear 620 rotates, the planet gears 530 meshed with it are installed on the fixed planet carrier 510 and start to rotate self, while driving the sun gear 540 to output power. The inner ring of the third bearing 610 rotates with the ring gear 620, and the outer ring remains stationary, forming a rotating support interface to ensure the stability of the rotation of the ring gear 620 and avoid radial offset.

[0056] In a possible implementation manner, in the transmission chain structure of the embodiment of the present application, the third bearing 610 is a double-row cylindrical roller bearing, and the first planetary gear train 500 is a double-connected planetary gear train. The double-row cylindrical roller bearing further bears the radial load and is used to support the rotating ring gear 620, reducing vibration and off-axis load.

[0057] Due to the relatively large size of the force transmission cylinder 300, the first-stage planetary gear train 500 can adopt a fixed-axis gear train structure with the ring gear as the input, the sun gear as the output, and the planet carrier fixed. It should be noted that in addition to avoiding the problem of uneven floating of the fixed shaft 520 of the first-stage planetary gear train 500, it can also be set as a double-connected planetary gear to increase the transmission ratio within a limited space.

[0058] It can be understood that when the first planetary gear train 500 is a double-connected planetary gear train, each planet gear 530 has two gears with different numbers of teeth. The two gears are coaxially arranged and rotatably arranged on the fixed shaft 520 of the planet carrier 510 to rotate synchronously. For the convenience of description, the two gears are named the first gear and the second gear. The first gear meshes with the ring gear 620, and the second gear meshes with the sun gear 540.

[0059] The transmission process is as follows: the ring gear 620 rotates to drive the first gear on the planet gear 530 to rotate. Since the first gear and the second gear rotate synchronously, the second gear rotates synchronously. The second-stage gear drives the sun gear 540 to output power, thereby adjusting the transmission ratio and achieving the effect of multi-stage transmission in a single-stage planetary gear train 500, saving axial space, being suitable for use in a limited space. In addition, it can also reduce the number of gearbox stages, reduce the material consumption and manufacturing cost, and at the same time reduce the overall weight.

[0060] The present application does not limit how to realize the synchronous rotation mode of the two gears. Exemplarily, the synchronous rotation between the two gears is realized through interference fit or keyway connection.

[0061] To enhance the stability of the mounting support 200, the present application further includes a support member 700. One end of the support member 700 is connected to the mounting support 200, and the other end is for connection to the chassis.

[0062] The mounting seat 210 is a bearing seat. As a bearing seat, the mounting seat 210 is used to support the rotating member. Both the first rotating member 400 and the second rotating member 600 are bearings, thereby allowing the force transmission cylinder 300 to rotate therein. The bearing seat is used to support the force transmission cylinder 300, ensuring its radial or axial positioning during rotation, and at the same time dispersing the load.

[0063] In some embodiments, the mounting support 200 includes at least one mounting seat 210, and the support member 700 includes a first support rod 710 and a second support rod 720. The first support rod 710 is connected to the mounting seat 210, and one end of the second support rod 720 is connected to the first support rod 710, and the other end is connected to the chassis.

[0064] It should be noted that the present application does not limit the number of the mounting seats 210. For example, there may be two mounting seats 210. The two mounting seats 210 arranged at intervals can improve the stability of the force transmission cylinder 300 and avoid excessive deformation caused by single-point excessive force. Moreover, multiple bearing seats arranged at intervals can better cope with axial and radial forces, reduce the deflection of the shaft, and ensure the transmission efficiency. The two mounting seats 210 are respectively arranged corresponding to the first rotating member 400 and the second rotating member 600. For example, the outer ring of the first rotating member 400 is arranged inside the mounting seat 210, that is, the mounting seat 210 is sleeved on the outer ring of the first rotating member 400, and the outer ring of the second rotating member 600 is also arranged inside the mounting seat 210, that is, the mounting seat 210 is sleeved on the outer ring of the second rotating member 600. The number of the mounting seats 210 can also be one, and both ends of the mounting seat 210 are respectively connected to the first rotating member 400 and the second rotating member 600. Specifically, one end of the mounting seat 210 is connected to the outer ring end face of the first rotating member 400, and the other end of the mounting seat 210 is connected to the outer ring end face of the second rotating member 600.

[0065] Among them, the mounting support 200 includes at least two mounting seats 210, and the mounting seats 210 are arranged at intervals along the axis direction of the force transmission cylinder 300. The support member 700 includes a first support rod 710 and a second support rod 720. Both ends of the first support rod 710 are respectively connected to two adjacent mounting seats 210 in one-to-one correspondence, and one end of the second support rod 720 is connected to the first support rod 710, and the other end is connected to the chassis.

[0066] The first support rod 710 connects two adjacent bearing seats horizontally to form a rigid frame, preventing the bearing seats from shifting due to the vibration or torque of the transmission chain.

[0067] The second support rod 720 is fixed to the first support rod 710 at one end and connected to the chassis at the other end, transmitting the force of the transmission chain to the chassis, forming a triangular stable structure, and reducing the vibration transmitted to the tower or the nacelle.

[0068] On the other hand, the present application also provides a wind turbine generator, including a body and the transmission chain structure in any of the above embodiments provided on the body.

[0069] The present application provides a wind turbine generator for converting wind energy into electrical energy. The body of the wind turbine generator includes a tower and a nacelle. The nacelle is arranged on the top of the tower. The transmission chain structure is at least partially arranged in the nacelle. The hub 100 of the transmission chain structure is arranged on the top of the tower and connected to the nacelle. In the transmission chain structure of the present application, by extending the rotating hub 100, the extended part is placed in the nacelle and rotates at the same speed as the hub 100. The parts of the hydraulic pitch system are integrated inside the hub 100 and the force transmission cylinder 300, thus eliminating the need for a liquid slip ring and having enough maintenance space for structural arrangement.

[0070] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0071] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A transmission chain structure, characterized in that, Comprising: A hub, within which there is a first accommodation cavity; A mounting support for connecting with the chassis of the nacelle; A force transmission cylinder rotatably arranged within the mounting support, the force transmission cylinder being used for connecting with the hub and rotating synchronously with the hub, within which there is a second accommodation cavity, the first accommodation cavity and the second accommodation cavity being in communication, the second accommodation cavity being used for installing at least one of an accumulator, an oil tank, a pump set, a pitch valve set and a distribution valve set of the hydraulic pitch system, and the first accommodation cavity being used for installing an oil cylinder of the hydraulic pitch system.

2. The drive chain structure according to claim 1, wherein It further includes a first rotating member sleeved on the force transmission cylinder, one end of the force transmission cylinder being connected with the hub through the first rotating member, and the first rotating member being rotatably arranged on the mounting support.

3. The drive chain structure according to claim 2, characterized in that, The first rotating member includes a first bearing and a second bearing. The inner rings of the first bearing and the second bearing are sequentially sleeved on the force transmission cylinder, and the outer rings of the first bearing and the second bearing are fixedly connected with the mounting support. The inner rings of the first bearing and the second bearing rotate relative to the mounting support around the axis of the hub.

4. The drive chain structure according to claim 3, characterized in that, The balls of the first bearing are longitudinally arranged, and the balls of the second bearing are transversely arranged.

5. The drive chain structure according to claim 1, characterized in that, It further includes a first planetary gear train and a second rotating member. The first planetary gear train includes a planet carrier, a fixed shaft, planet gears and a sun gear. The fixed shaft is arranged on the planet carrier, the planet gears are rotatably arranged on the fixed shaft, and the planet gears mesh with the sun gear; The second rotating member is connected with the end of the force transmission cylinder departing from the hub, and the second rotating member meshes with the planet gears, and the second rotating member is rotatably arranged on the mounting support.

6. The drive chain structure according to claim 5, characterized in that, The second rotating member includes a third bearing and a ring gear. The third bearing has an inner ring and an outer ring. The inner ring of the third bearing is connected with the ring gear, the ring gear meshes with the planet gears, the outer ring of the third bearing is fixedly connected with the mounting support, and the inner ring of the third bearing rotates relative to the mounting support around the axis of the hub.

7. The drive chain structure according to claim 6, wherein, The third bearing is a double-row cylindrical roller bearing, and the first planetary gear train is a double-connected type planetary gear train.

8. The drive chain structure according to any one of claims 1-7, characterized in that, It further includes a support member, one end of the support member being connected with the mounting support, and the other end being used for connecting with the chassis.

9. The drive chain structure according to claim 8, wherein, The mounting support includes at least one mounting seat. The support member includes a first support rod and a second support rod. The first support rod is connected with the mounting seat, one end of the second support rod is connected with the first support rod, and the other end is connected with the chassis.

10. A wind power generating set, characterized in that, Comprising a body and the drive chain structure according to any one of claims 1-9 provided on the body.

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