CN111894808A - A transmission system installation structure for floating wind turbines - Google Patents

Abstract

The invention discloses a transmission system mounting structure for a floating type wind generating set, which comprises a gear box shell and a generator shell, wherein the rear end of the gear box shell is connected with the front end of the generator shell; the generator shell comprises a front end bearing structure and a rear end stator mounting structure, wherein an outer convex flange is arranged at the joint of the front end bearing structure and the rear end stator mounting structure and is connected with a host mounting interface; the rear end stator mounting structure comprises a generator rear end shell and a generator stator supporting frame, and the generator stator supporting frame is arranged inside the generator rear end shell. The drive train can be connected to the main unit mounting interface on the wing tower in a simple manner by means of the mounting arrangement. The invention relates to the technical field of wind power generation.

Description

A transmission system installation structure for floating wind turbines

technical field

The invention relates to the technical field of wind power generation, in particular to a drive system installation structure for a floating wind power generating set.

Background technique

Generally, the generator and gearbox shell of the compact wind turbine are connected together, and then connected to the tower through the nacelle seat of the elbow structure. This conventional conventional type of mounting structure is suitable for cast or welded racks. However, the tower structure of the floating wind turbine has an airfoil section. In order to connect the transmission system with the airfoil tower, a special-shaped main engine installation interface needs to be installed on the airfoil tower. It is necessary to adjust the installation method of the transmission system and the installation interface of the host.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the defects and deficiencies of the prior art, and to provide a transmission system installation structure for floating wind turbines, through which the transmission system can be simply connected to the main engine installation interface on the airfoil tower .

The object of the present invention can be achieved through the following technical solutions: a transmission system installation structure for a floating wind turbine, comprising a gearbox casing and a generator casing, the rear end of the gearbox casing is connected to the front end of the generator casing The generator casing includes a front-end bearing structure and a rear-end stator installation structure, and the connection between the front-end bearing structure and the rear-end stator installation structure is provided with an outer convex flange, and the outer convex flange is connected with the main engine installation interface; the The rear-end stator mounting structure includes a generator rear-end housing and a generator-stator support frame, and the generator-stator support frame is arranged inside the generator rear-end housing.

Further, a plurality of reinforcing ribs are arranged inside the front end bearing structure. Reinforcing ribs can improve the bearing capacity of the generator casing.

Further, the bottom of the front end bearing structure is provided with a lubricating oil return port. The oil return port of the lubricating oil circuit is integrated with the generator casing, which can improve the overall integration.

Further, a plurality of threaded holes are provided on the edge of the outer convex flange, and the double-ended studs are respectively connected to the threaded holes on the outer convex flange and the threaded holes on the host installation interface.

Further, the wall thickness between the front end bearing structure and the outer convex flange gradually becomes thicker. The use of gradient wall thickness can significantly improve the connection strength of the convex flange and meet the large load transfer requirements from the wind rotor to the airfoil tower.

Further, the generator stator support frame is made by casting or welding.

Further, the rear end casing of the generator is made of steel plate or glass fiber reinforced plastic material.

Further, a generator cooling system is provided inside the main engine installation interface. Integrating the generator cooling system with the cabin cooling system in the main engine mounting interface can enhance cooling and reduce costs.

Further, an input shaft and an output shaft are arranged in the casing of the gearbox, a generator rotor is arranged in the casing of the generator, and the output shaft and the rotor of the generator are connected by a coupling.

Further, the input shaft is connected with the wind wheel.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The installation structure of the present invention can connect the transmission system with the main engine installation interface, and is suitable for the tower with airfoil section of the floating wind turbine.

2. The shorter part of the front end of the generator casing of the present invention has a compact structure, and the path for transmitting the load of the wind wheel is short, which is favorable for lightweight design. In addition, the gradual wall thickness transition is adopted, which significantly improves the connection strength of the outer flange and meets the large load transfer requirements from the wind rotor to the airfoil tower.

3. The rear end of the generator casing of the present invention adopts the design of the frame body and the thin-wall casing, which greatly reduces the weight of the generator casing. And the back end extends into the host installation interface, making full use of the internal space of the host installation interface.

4. The generator cooling system can be arranged inside the main engine installation interface of the present invention, and the integrated design with the engine room cooling system in the main engine installation interface can enhance the cooling effect and reduce the cost.

Description of drawings

1 is a sectional view of the installation structure of a transmission system in an embodiment of the present invention;

Figure 2 is a schematic diagram of the structure of the generator casing in the embodiment of the present invention;

Fig. 3 is the sectional view of Fig. 2;

4 is a schematic structural diagram of a floating wind turbine in an embodiment of the present invention;

FIG. 5 is a left side view of FIG. 4 .

Among them: 1: Gearbox casing, 2: Generator casing, 21: Front bearing structure, 211: Reinforcing ribs, 22: Rear stator mounting structure, 221: Generator rear casing, 222: Generator stator support frame, 23: Outer flange, 231: Tapped hole, 3: Host installation connection port, 31: Steel strand connection point, 4: Airfoil tower, 5: Wind wheel, 6: Lubricating oil return port.

Detailed ways

The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in FIG. 1 , the tower structure of the floating wind turbine has an airfoil section. In order to connect the transmission system to the airfoil tower 4 , a special-shaped main engine installation interface 3 needs to be installed on the airfoil tower 4 . First, the steel plate is used to make a cylindrical cylinder, and then three arc steel plates are spliced to form an airfoil section cylinder, and the cylindrical cylinder and the airfoil section cylinder are welded to form the main engine installation interface 3. As shown in Figures 4 and 5, the airfoil section of the main engine installation interface 3 is the same as that of the airfoil tower, which is the main component of load transmission. A tower connection flange is welded at the airfoil section of the main engine installation interface 3, and the tower connection flange and the airfoil tower 4 are connected by bolts. The airfoil tower 4 is arranged obliquely. In order to improve the stability, a steel strand connection point 31 can be set on the main engine installation interface 3, and the steel strand passes through the connection point and is fixed on the floating foundation.

As shown in Figures 2 and 3, a transmission system installation structure for a floating wind turbine includes a gearbox casing 1 and a generator casing 2. The rear end of the gearbox casing 1 is connected to the generator casing through double-ended studs. 2 front-end connections. The generator casing 2 adopts a casting structure, including a front end bearing structure 21 and a rear end stator mounting structure 22 , and an outer convex flange 23 is provided at the connection between the front end bearing structure 21 and the rear end stator mounting structure 22 . There are a plurality of threaded holes 231 on the edge of the convex flange 23, and the double-ended studs are respectively connected to the threaded holes on the convex flange 23 and the threaded holes on the main engine installation interface 3, so as to realize the installation of the generator shell 2 and the main engine. Connection of port 3.

As shown in FIG. 3 , the front end bearing structure 21 is provided with a plurality of reinforcing ribs 211 , which can increase the bearing capacity of the front end bearing structure 21 . The front end bearing structure 21 is used to transmit the load of the wind wheel, and has a short design and a compact structure, which can shorten the load transmission path and facilitate lightweight design. The wall thickness between the front end bearing structure 21 and the convex flange 23 is gradually thickened, which can significantly improve the connection strength of the convex flange 23 and meet the large load transmission requirements from the wind wheel 5 to the airfoil tower 4 . The rear-end stator mounting structure 22 does not transmit the wind wheel load, and includes a generator rear-end housing 221 and a generator-stator supporting frame 222 , and the generator-stator supporting frame 222 is disposed inside the generator rear-end housing 221 . The structural design of the frame body and the thin-walled casing can greatly reduce the weight of the generator casing. The rear stator installation structure 22 is the installation area of the generator stator, and the generator stator support frame 222 can be made by casting or welding. The generator rear end casing 221 serves as a protective cover for the generator stator support frame 222 and can be made of steel plate or glass fiber reinforced plastic.

The bottom of the front end bearing structure 21 is provided with a lubricating oil circuit return port 6, and integrating the lubricating oil circuit oil return port 6 with the generator casing can improve the compactness of the transmission system installation structure. The rear stator mounting structure 22 extends into the interior of the host mounting interface 3 , so that the internal space of the host mounting interface 3 can be fully utilized. At the same time, the generator cooling system can be arranged in the main engine installation interface 3, and the ventilation holes of the cooling system can be arranged on the main engine installation interface 3, so as to further improve the integration degree.

The gearbox casing is provided with an input shaft and an output shaft, the generator casing is provided with a generator rotor and a stator, the input shaft is connected with the wind wheel 5, and the output shaft is connected with the generator rotor through a coupling. Attachment installation connection points can be conveniently set on the gearbox casing and generator casing, such as lubricating holes and pipeline passage openings can be added.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. A transmission system installation structure for a floating wind turbine, characterized in that it comprises a gearbox casing and a generator casing, and the rear end of the gearbox casing is connected to the front end of the generator casing; The generator casing includes a front-end bearing structure and a rear-end stator installation structure, and an outer convex flange is provided at the connection between the front-end bearing structure and the rear-end stator installation structure, and the outer convex flange is connected with the main engine installation interface; the rear The end stator mounting structure includes a generator rear end casing and a generator stator support frame, the generator stator support frame being arranged inside the generator rear end casing. 2 . The transmission system installation structure for floating wind turbines according to claim 1 , wherein a plurality of reinforcing ribs are provided inside the front end bearing structure. 3 . 3 . The transmission system installation structure for floating wind turbines according to claim 2 , wherein the bottom of the front end bearing structure is provided with a lubricating oil return port. 4 . 4. A transmission system installation structure for a floating wind turbine according to claim 1, wherein the edge of the outer convex flange is provided with a plurality of threaded holes, and the studs are respectively connected to the outer The threaded holes on the male flange and the threaded holes on the host mounting interface. 5. A transmission system installation structure for floating wind turbines according to any one of claims 1 to 4, characterized in that the wall thickness between the front end bearing structure and the convex flange is gradually thicken. 6 . The drive system installation structure for floating wind turbines according to claim 1 , wherein the generator stator support frame is made by casting or welding. 7 . 7 . The drive system installation structure for floating wind turbines according to claim 1 , wherein the rear end shell of the generator is made of steel plate or glass fiber reinforced plastic material. 8 . 8 . The drive system installation structure for floating wind turbines according to claim 1 , wherein a generator cooling system is arranged inside the main engine installation interface. 9 . 9 . The drive system installation structure for floating wind turbines according to claim 1 , wherein an input shaft and an output shaft are arranged in the casing of the gearbox, and a rotor of the generator is arranged in the casing of the generator, 10 . The output shaft is connected with the generator rotor through a coupling. 10. A transmission system installation structure for a floating wind turbine according to claim 9, wherein the input shaft is connected to the wind rotor.

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