A tandem dual-rotor wind turbine, a drive train, and an installation method

Abstract

The present application discloses a tandem dual-rotor wind turbine set, a transmission chain, and an installation method. The tandem dual-rotor transmission chain includes a generator, a rear rotor coupling, a rear rotor gearbox, a rear rotor main shaft, a tandem coupling, a connecting shaft, a front rotor coupling, a front rotor gearbox, and a front rotor main shaft. The generator is connected to the rear rotor coupling rearward, and behind the generator, the rear rotor coupling, the rear rotor gearbox, and the rear rotor main shaft are connected in sequence rearward. The generator is connected to the tandem coupling forward, and in front of the generator, the tandem coupling, the connecting shaft, the front rotor coupling, the front rotor gearbox, and the front rotor main shaft are connected in sequence forward. The above-mentioned tandem dual-rotor transmission chain not only ensures the coaxiality of the tandem dual-rotor gearbox output shaft and the generator, but also reduces the difficulty of assembling the dual-rotor transmission chain.

Description

Technical Field

[0001] The present application relates to the field of wind power generation technology, and more particularly to a tandem dual-rotor transmission chain, a tandem dual-rotor wind turbine generator system using the tandem dual-rotor transmission chain, and a method for installing the tandem dual-rotor transmission chain. Background Art

[0002] Traditional single-rotor wind turbines increase the wind energy utilization coefficient (Cp) by increasing the swept area, and Cp Max ≤0.49, further improvement is extremely difficult. The twin-rotor wind turbine has two independent wind rotor systems. The rear wind rotor can further absorb wind energy to generate electricity. Max ≥0.5.

[0003] Tandem twin-turbine generator sets can improve wind energy efficiency and significantly reduce the cost of large-capacity wind turbines. They leverage the existing, mature wind power industry chain to produce tandem twin-turbine units. Tandem twin-turbine units utilize a dual-rotor integrated generator. The two gearbox output shafts of a tandem twin-turbine unit share a single generator. This requires high coaxiality between the gearbox output shaft and the generator input shaft, within ±0.2mm. Traditional drive chain designs cannot adjust the coaxiality of the front and rear rotor gearbox output shafts.

[0004] Therefore, how to provide a serial double wind wheel transmission chain that solves the above technical problems is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0005] The purpose of this application is to provide a tandem twin-rotor transmission chain that not only ensures the coaxiality of the tandem twin-rotor gearbox output shaft and the generator, but also reduces the difficulty of assembling the twin-rotor transmission chain. Another purpose of this application is to provide a tandem twin-rotor wind turbine generator system using the tandem twin-rotor transmission chain, as well as a method for installing the tandem twin-rotor transmission chain.

[0006] To achieve the above objectives, the present application provides a tandem dual-wind rotor transmission chain, comprising a generator, a rear wind rotor coupling, a rear wind rotor gearbox, a rear wind rotor main shaft, a tandem coupling, a connecting shaft, a front wind rotor coupling, a front wind rotor gearbox, and a front wind rotor main shaft;

[0007] The generator is connected to the rear wind wheel coupling backward, and behind the generator, the rear wind wheel coupling, the rear wind wheel gear box and the rear wind wheel main shaft are connected backward in sequence;

[0008] The generator is connected to the serial coupling forwardly, and in front of the generator, the serial coupling, the connecting shaft, the front wind wheel coupling, the front wind wheel gear box and the front wind wheel main shaft are connected forwardly in sequence.

[0009] In some embodiments, the rear wind wheel main shaft is located at the center of the rear wind wheel hub, and the front wind wheel main shaft is located at the center of the front wind wheel hub.

[0010] In some embodiments, a rear wind wheel rear bearing and a rear wind wheel front bearing are further included, and the rear wind wheel rear bearing and the rear wind wheel front bearing are respectively arranged at both ends of the rear wind wheel main shaft behind the generator.

[0011] In some embodiments, a front wind wheel rear bearing and a front wind wheel front bearing are further included, and in front of the generator, the front wind wheel rear bearing and the front wind wheel front bearing are respectively arranged at both ends of the front wind wheel main shaft.

[0012] In some embodiments, a pair of supports are provided at the connecting shaft, each of the supports is equipped with a bearing, and the connecting shaft is supported by the pair of bearings.

[0013] The present application also provides a tandem dual-rotor wind turbine generator set, comprising the above-mentioned tandem dual-rotor transmission chain.

[0014] The present application also provides a method for installing a tandem double wind wheel transmission chain, which is used to install the above-mentioned tandem double wind wheel transmission chain. The installation method includes:

[0015] First, assemble the rear wind wheel coupling and the rear wind wheel gearbox behind the generator, and ensure that the rear wind wheel gearbox and the generator meet the coaxiality requirement through the rear wind wheel coupling;

[0016] Then, a serial coupling, a connecting shaft, a front wind wheel coupling and a front wind wheel gearbox are assembled in front of the generator. The position of the connecting shaft is adjusted by the serial coupling so that the coaxiality of the connecting shaft and the generator is consistent with the coaxiality of the rear wind wheel coupling. Finally, the front wind wheel coupling is used to ensure that the front wind wheel gearbox and the generator meet the coaxiality requirements.

[0017] Compared with the above-mentioned background technology, the serial dual wind wheel transmission chain provided in the present application includes a generator, a rear wind wheel coupling, a rear wind wheel gearbox, a rear wind wheel main shaft, a serial coupling, a connecting shaft, a front wind wheel coupling, a front wind wheel gearbox and a front wind wheel main shaft; the generator is connected to the rear wind wheel coupling rearward, and behind the generator, the rear wind wheel coupling, the rear wind wheel gearbox and the rear wind wheel main shaft are connected in sequence backward; the generator is connected to the serial coupling forward, and in front of the generator, the serial coupling, the connecting shaft, the front wind wheel coupling, the front wind wheel gearbox and the front wind wheel main shaft are connected in sequence forward.

[0018] The above-mentioned tandem dual-wind rotor transmission chain can reduce the difficulty of centering the transmission chain assembly process by adjusting the position of the connecting shaft, which not only ensures the coaxiality of the output shaft of the tandem dual-wind rotor gearbox and the generator, but also reduces the difficulty of assembling the dual-wind rotor transmission chain, thereby greatly reducing the assembly time and assembly cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0020] Figure 1 A schematic diagram of a tandem double wind wheel transmission chain provided in an embodiment of the present application;

[0021] Figure 2 A structural diagram of a tandem double wind wheel transmission chain provided in an embodiment of the present application;

[0022] Figure 3 A three-dimensional structural diagram of the serial dual-wind wheel transmission chain provided in an embodiment of the present application.

[0023] in:

[0024] 10-generator, 21-rear wind wheel coupling, 22-rear wind wheel gearbox, 23-rear wind wheel main shaft, 24-rear wind wheel hub center, 25-rear wind wheel rear bearing, 26-rear wind wheel front bearing, 31-tandem coupling, 32-connecting shaft, 33-front wind wheel coupling, 34-front wind wheel gearbox, 35-front wind wheel main shaft, 36-front wind wheel hub center, 37-front wind wheel rear bearing, 38-front wind wheel front bearing, 321-support, 322-bearing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Please refer to Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of a tandem double wind wheel transmission chain provided in an embodiment of the present application. Figure 2 This is a structural diagram of a tandem double wind wheel transmission chain provided in an embodiment of the present application. Figure 3 A three-dimensional structural diagram of the serial dual-wind wheel transmission chain provided in an embodiment of the present application.

[0028] In the first specific embodiment, the present application provides a serial dual wind wheel transmission chain, which mainly includes a generator 10, a rear wind wheel coupling 21, a rear wind wheel gearbox 22, a rear wind wheel main shaft 23, a serial coupling 31, a connecting shaft 32, a front wind wheel coupling 33, a front wind wheel gearbox 34 and a front wind wheel main shaft 35.

[0029] In this embodiment, the generator 10 is connected to the rear wind wheel coupling 21 backward, and at the rear of the generator 10, the rear wind wheel coupling 21, the rear wind wheel gear box 22 and the rear wind wheel main shaft 23 are connected backward in sequence; the generator 10 is connected to the series coupling 31 forward, and at the front of the generator 10, the series coupling 31, the connecting shaft 32, the front wind wheel coupling 33, the front wind wheel gear box 34 and the front wind wheel main shaft 35 are connected forward in sequence.

[0030] Although the tandem dual-rotor wind turbine generator set has the advantage of high wind energy utilization rate, the traditional transmission chain structure and the current assembly process technology will greatly increase the difficulty of assembly and lifting. The advantage of this application compared with the existing technology is that the above-mentioned tandem dual-rotor transmission chain can reduce the centering difficulty of the transmission chain assembly process by adjusting the position of the connecting shaft 32 (short shaft), which not only ensures the coaxiality of the tandem dual-rotor gearbox output shaft and the generator, but also reduces the assembly difficulty of the dual-rotor transmission chain, thereby greatly reducing the assembly time and assembly cost.

[0031] In some embodiments, the rear wind wheel main shaft 23 is located on the rear wind wheel hub center 24 , and the front wind wheel main shaft 35 is located on the front wind wheel hub center 36 .

[0032] It should be noted that the purpose of this application is to provide a tandem twin-rotor transmission chain suitable for a tandem twin-rotor wind turbine set, which is an improvement to the difficulty of the transmission chain assembly process; this application changes the transmission chain structure and designs the transmission chain structure of the wind turbine set, which can not only reduce the span of the front wind rotor main shaft, but also meet the coaxiality requirements of the transmission chain, thereby reducing the difficulty of assembly; in addition, no other structures and working principles of the tandem twin-rotor wind turbine set are changed, so the relevant content other than that provided by this application can refer to the existing technology, and will not be repeated here.

[0033] In summary, the present application adopts three couplings and a short shaft to connect the output shafts of the front and rear wind wheel gearboxes and the input shaft of the generator. While ensuring the coaxiality of the output shaft of the rear wind wheel gearbox and the input shaft of the generator, the position of the short shaft can be adjusted to meet the coaxiality requirements of the output shaft of the front wind wheel gearbox and the generator; connecting the front wind wheel coupling and the series coupling through the short shaft is based on the powerful correction ability of the front wind wheel coupling, and the gearbox has stronger tolerance to different axialities than the generator, so that the installation requirements of the front wind wheel coupling can be within the coupling deviation range.

[0034] In addition, a rear wind wheel rear bearing 25 and a rear wind wheel front bearing 26 are also included, and at the rear of the generator 10, the rear wind wheel rear bearing 25 and the rear wind wheel front bearing 26 are respectively arranged at both ends of the rear wind wheel main shaft 23.

[0035] In addition, a front wind wheel rear bearing 37 and a front wind wheel front bearing 38 are also included, and in front of the generator 10, the front wind wheel rear bearing 37 and the front wind wheel front bearing 38 are respectively arranged at both ends of the front wind wheel main shaft 35.

[0036] Specifically, if Figure 1 As shown, the main shafts of the front and rear wind wheels (the rear wind wheel main shaft 23 and the front wind wheel main shaft 35) are supported at four points, the front and rear main bearings (the wind wheel rear bearing 25 and the rear wind wheel front bearing 26, the front wind wheel rear bearing 37 and the front wind wheel front bearing 38) are double spherical roller bearings (double SRB), the gearbox structure (the rear wind wheel gearbox 22 and the front wind wheel gearbox 34) is a first-stage planetary + first-stage parallel, and the generator structure (generator 10) is a dual-rotor integrated structure.

[0037] In order to ensure the coaxiality of the main shafts of the front and rear wind wheels, the connection between the front and rear wind wheel gear boxes uses the serial double wind wheel transmission chain of the present application.

[0038] The front wind wheel coupling 33 is connected to the serial coupling 31 through a short shaft (connecting shaft 32). After the generator 10 is installed, the installation position of the short shaft can be adjusted so that the short shaft and the generator rotor meet the coaxiality; by lifting the front wind wheel gear box 34, the non-coaxiality between the front wind wheel gear box 34 and the short shaft can be adjusted. The adjustment target can be based on the coupling installation requirements.

[0039] The distance between the rear wind wheel gearbox 22 and the generator 10 is the same as that of a conventional doubly fed unit, so the rear wind wheel gearbox 22 and the generator 10 can be aligned using conventional methods to meet the coaxiality requirements; the short shaft position is adjusted by the serial coupling 31 so that the coaxiality of the short shaft and the generator 10 is consistent with the coaxiality of the rear wind wheel coupling 21; the front wind wheel coupling 33 can adjust the coaxiality between the short shaft and the front wind wheel gearbox 34, and the adjustment value can be within the installation requirement range of the front wind wheel coupling 33.

[0040] In some embodiments, a pair of supports 321 are provided at the connecting shaft 32 , and each of the pair of supports 321 is equipped with a bearing 322 , so that the connecting shaft 32 is supported by the pair of bearings 322 .

[0041] In this embodiment, the short shaft connects the front wind wheel coupling 33 and the serial coupling 31, and is fixed by two bearings.

[0042] The present application also provides a serial dual-rotor wind turbine generator set, including the above-mentioned serial dual-rotor transmission chain, which should have all the beneficial effects of the above-mentioned serial dual-rotor transmission chain, ensure the coaxiality of the output shaft of the front wind wheel gearbox, and meet the centering requirements.

[0043] The present application also provides a method for installing a tandem double wind wheel transmission chain, which is used to install the above-mentioned tandem double wind wheel transmission chain. The installation method includes:

[0044] First, assemble the rear wind wheel coupling 21 and the rear wind wheel gear box 22 behind the generator 10, and ensure that the rear wind wheel gear box 22 and the generator 10 meet the coaxiality requirements through the rear wind wheel coupling 21;

[0045] Then, the serial coupling 31, the connecting shaft 32, the front wind wheel coupling 33 and the front wind wheel gear box 34 are assembled in front of the generator 10. The position of the connecting shaft 32 is adjusted through the serial coupling 31 so that the coaxiality of the connecting shaft 32 and the generator 10 is consistent with the coaxiality of the rear wind wheel coupling 21. Finally, the front wind wheel gear box 34 and the generator 10 meet the coaxiality requirements through the front wind wheel coupling 33.

[0046] In this embodiment, the serial transmission chain structure is assembled, and the rear wind wheel coupling 21 and the generator 10 are assembled first to meet the coaxiality requirements; secondly, the serial coupling 31 ensures that the coaxiality of the short shaft and the generator 10 is consistent with the coaxiality of the rear wind wheel coupling 21; finally, the coaxiality requirement of the front wind wheel coupling 33 is within the range of its own installation requirements.

[0047] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0048] 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.

[0049] The above is a detailed introduction to the tandem twin-rotor wind turbine set, transmission chain and installation method provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A tandem double wind wheel transmission chain, characterized in that: It comprises a generator (10), a rear wind wheel coupling (21), a rear wind wheel gear box (22), a rear wind wheel main shaft (23), a tandem coupling (31), a connecting shaft (32), a front wind wheel coupling (33), a front wind wheel gear box (34) and a front wind wheel main shaft (35); The generator (10) is connected to the rear wind wheel coupling (21) in a rearward direction, and behind the generator (10), the rear wind wheel coupling (21), the rear wind wheel gear box (22) and the rear wind wheel main shaft (23) are connected in sequence in a rearward direction; The generator (10) is connected to the serial coupling (31) in front of the generator (10), and in front of the generator (10), the serial coupling (31), the connecting shaft (32), the front wind wheel coupling (33), the front wind wheel gear box (34) and the front wind wheel main shaft (35) are connected in sequence in front of the generator (10), and the difficulty of centering the transmission chain assembly process is reduced by adjusting the position of the connecting shaft (32).

2. The tandem double wind wheel transmission chain according to claim 1, characterized in that: The rear wind wheel main shaft (23) is located on the rear wind wheel hub center (24), and the front wind wheel main shaft (35) is located on the front wind wheel hub center (36).

3. The tandem double wind wheel transmission chain according to claim 1, characterized in that: It also includes a rear wind wheel rear bearing (25) and a rear wind wheel front bearing (26), and the rear wind wheel rear bearing (25) and the rear wind wheel front bearing (26) are respectively arranged at both ends of the rear wind wheel main shaft (23) behind the generator (10).

4. The tandem double wind wheel transmission chain according to claim 1, characterized in that: It also includes a front wind wheel rear bearing (37) and a front wind wheel front bearing (38), and in front of the generator (10), the front wind wheel rear bearing (37) and the front wind wheel front bearing (38) are respectively arranged at both ends of the front wind wheel main shaft (35).

5. The tandem double wind wheel transmission chain according to claim 1, characterized in that: A pair of supports (321) are provided at the connecting shaft (32), and the pair of supports (321) are both equipped with bearings (322). The connecting shaft (32) is supported by the pair of bearings (322).

6. A tandem double-rotor wind turbine generator system, characterized in that: It comprises the serial double wind wheel transmission chain as described in any one of claims 1 to 5.

7. A method for installing a tandem double wind wheel transmission chain, characterized in that: For installing the tandem double wind wheel transmission chain according to any one of claims 1 to 5, the installation method comprises: First, a rear wind wheel coupling (21) and a rear wind wheel gear box (22) are assembled behind the generator (10), and the rear wind wheel gear box (22) and the generator (10) are made to meet the coaxiality requirement through the rear wind wheel coupling (21); Then, a serial coupling (31), a connecting shaft (32), a front wind wheel coupling (33) and a front wind wheel gear box (34) are assembled in front of the generator (10); the position of the connecting shaft (32) is adjusted by the serial coupling (31) so that the coaxiality of the connecting shaft (32) and the generator (10) is consistent with the coaxiality of the rear wind wheel coupling (21); finally, the front wind wheel gear box (34) and the generator (10) meet the coaxiality requirement through the front wind wheel coupling (33).

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