CN201386629Y - wind turbine base - Google Patents

Abstract

The utility model provides a base of a wind power generator, which is characterized in that the bearing seat of the main shaft of the impeller of the wind power generator is integrated with the main frame. The best embodiment of the utility model is that, when observing the base from the top, there is a top hole between the two bearings, the minimum distance between the edge of the hole is at least 300mm, and the specific size of the top hole is related to the external dimensions of the parts that need to pass through the hole . Compared with the current way that the bearing seat is separated from the main frame, the utility model has the following effects: the weight of the base is reduced, the structure is simplified, the strength is enhanced to bear large loads, the rigidity is better and it is not easy to deform. Moreover, it has fewer processing surfaces and better machining manufacturability, thereby reducing machining workload and lowering production costs; in addition, it has better casting manufacturability and reduces the occurrence rate of defective products.

Description

wind turbine base

technical field

The utility model relates to a base of a wind power generator. Specifically, the base referred to in the present invention refers to the bearing seat of the main shaft of the impeller of the wind power generator and the main frame as a whole.

Background technique

Wind turbines provide primary energy that can be converted into electrical energy and used in the grid, by driving generators in which wind energy is converted into electrical energy. In recent years, with the enhancement of environmental awareness and the support of national policies, the development of clean and renewable energy has received more and more attention. With the development of wind power generation technology, the capacity of wind turbines has been increasing. Especially in recent years, with the emergence of domestic megawatt-level wind turbines, the weight of wind turbines has gradually increased.

However, for high-power wind turbines, the impellers obtain energy from the wind and also apply large loads to mechanical parts. These loads are finally transmitted to the tower, and all components located between the impeller and the tower are subjected to these large loads. Therefore, things like the bearing housing and the main frame need to have sufficient strength. In addition, the excessive assembly error and too small rigidity of the bearing seat and the base will affect the load of the components on the transmission chain and reduce the life of themselves and the components on the transmission chain. Therefore, the bearing seat and the base must have sufficient assembly accuracy and stiffness.

The base of the wind power generator in the prior art is that the bearing seat and the main frame are separately cast and processed, and the two are connected by a flange. Since the bearing seat and the base need to be processed separately, the processing accuracy is high; on the other hand, it is difficult to guarantee the connection rigidity of the flanges connected by bolts. Moreover, the increase of components such as flanges leads to an increase in the weight and cost of the wind turbine.

Contents of the invention

The utility model provides a base of a wind power generator, which is characterized in that the bearing seat of the main shaft of the impeller of the wind power generator is integrated with the main frame.

The best solution for realizing the utility model is that when the integrated base is viewed from the top, there is a top hole between the two bearings, and the minimum distance between the edges of the holes is at least 300mm. The purpose of the top hole is to facilitate the installation and disassembly of bearing axial positioning parts, seals and lubricating devices. The specific size of the top hole is related to the external dimensions of the parts that need to pass through the top hole.

Compared with the current way that the main frame of the bearing housing is separated, the front end of the base described in the utility model is used to install the two bearings supporting the main shaft of the impeller, and the non-rotating load from the impeller passes through the main shaft, the front bearing and the rear bearing Transferring to the base can improve the load transmission, thereby reducing the additional load of the components on the base and the transmission chain; and the seat holes of the two bearings can be processed on the same machining equipment, which has higher position accuracy and can improve the load of the base. Assembly accuracy with bearings.

The weight of the base described in the utility model is reduced and has stronger rigidity, is not easily deformed, has fewer processing surfaces, and has better machining processability, thereby reducing machining workload and reducing production costs; in addition, removing The connection flange is added, the weight is reduced, the structure is simplified, it has better strength to withstand large loads, and it has better casting process, reducing the occurrence rate of defective products.

Description of drawings

Fig. 1 is the side view of the preferred embodiment of the present utility model;

Fig. 2 is the side sectional view of the preferred embodiment of the utility model;

Fig. 3 is the front view of the preferred embodiment of the present utility model;

Fig. 4 is a top view of the preferred embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing 1,2,3 and 4, do an explanation to the preferred embodiment of the present utility model, wherein 1—base; 2—main shaft; 3—front bearing; 4—rear bearing; 5—top hole.

As shown in the figure, the utility model provides a base of a wind power generator, the front bearing 3 and the rear bearing 4 for installing the main shaft 2 are installed on the front end of the base 1 . There is a top hole 5 between the front bearing 3 and the rear bearing 4, the minimum distance between the edge of the hole is 300mm, and the specific size of the top hole 5 is related to the external dimensions of the parts that need to pass through the hole.

Claims (1)

1, a kind of wind-power electricity generation machine base is characterized in that the bearing support of wind-driven generator impeller spindle and mainframe are as a whole.

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