CN201401278Y - A wind turbine pitch system with adjustable backlash and its backlash adjustment device - Google Patents

Abstract

The utility model discloses a pitch changing system of a wind power generating set with adjustable backlash and a backlash adjusting device thereof. The wind turbine pitch system includes a casing, a pitch gearbox arranged in the casing, a pitch bearing engaged with the pitch gearbox, and a fixing flange for fixing the pitch bearing to or from the casing, The pitch gearbox has an interface for connecting with the pitch motor and for adjusting the backlash between the pitch gearbox and the pitch bearing. The backlash adjusting device has an insertion part for inserting into the interface and a handle for rotating the insertion part. The utility model skillfully utilizes the interface connecting the pitch-changing gear box and the pitch-changing motor to rotate the large gear, thereby adjusting the gap between the small gear and the internal teeth of the bearing. By turning the handle clockwise or counterclockwise, the pitch gearbox can be flexibly rotated in different directions to adjust to the specified gear clearance.

Description

A wind turbine pitch system with adjustable backlash and its backlash adjustment device

technical field

The utility model relates to a pitch changing system of a wind power generating set with adjustable backlash, and also relates to a backlash adjusting device for adjusting the gear backlash of the pitch changing system, which belongs to the technical field of wind power generation equipment.

Background technique

my country's wind power industry has entered a high-speed development track. According to the statistics of relevant research institutes, the cumulative installed capacity of wind power in my country reached 12.2 million kilowatts in 2008, and the cumulative installed capacity in 2009 will reach 20 million kilowatts. Therefore, the market prospect of my country's wind power equipment manufacturing industry and related fields is very broad.

In wind turbines, the pitch system plays an important role in adjusting the angle of the fan blades. The cooperation between the pitch gearbox and the pitch bearing directly affects the working condition of the pitch system. During the installation process, it is necessary to adjust the gear gap between the internal teeth of the pitch bearing and the gearbox, so that the gears mesh well and the pitch is changed synchronously. Therefore, it can be said that the adjustment of the backlash directly affects the efficiency of the cooperation between the gears and the wear and deformation of the gears.

In the pitch system, it is very important to have a good backlash adjustment tool for the pitch system. In the prior art, the method of adjusting the backlash with a wrench, a caliper, etc. encounters many difficulties in such a pitch control system. There are problems such as limited space, time-consuming and laborious, and difficulty in ensuring adjustment accuracy. Moreover, when adjusting the backlash, sometimes it may need to be adjusted clockwise, and sometimes it may need to be adjusted counterclockwise. It is also difficult for existing technologies to satisfy two-way adjustment.

Contents of the invention

The technical problem to be solved by the utility model is to provide a backlash adjustment device capable of bidirectionally adjusting the gear clearance of the pitch control system, and a pitch control system using the backlash adjustment device for backlash adjustment.

To achieve above-mentioned purpose, the utility model adopts following technical scheme:

A wind turbine pitch system with adjustable backlash, comprising a casing, a pitch gearbox arranged in the casing, a pitch bearing meshed with the pitch gearbox, and a pitch bearing for A fixed flange fixed to or detached from the housing, characterized in that:

The pitch gearbox has an interface for connecting with the pitch motor and for adjusting the backlash between the pitch gearbox and the pitch bearing.

The interface has a cylindrical shape extending in the central axis direction of the pitch gearbox.

The pitch gearbox includes a bull gear and a pinion for meshing with the pitch bearing, and the interface is arranged on the bull gear.

The central axis of the bull gear does not coincide with the central axis of the pitch bearing.

A backlash adjusting device, used for adjusting the backlash between the pitch gearbox and the pitch bearing in the above-mentioned wind turbine pitch system, characterized in that:

The backlash adjustment device has an insertion part for insertion into the interface and a handle for rotating the insertion part.

The insertion portion has a shape matching the interface.

The backlash adjustment device also has a connection part, the insertion part is vertically arranged on one side of the connection part, and the handle is vertically arranged on the other side of the connection part.

The utility model skillfully utilizes the interface connecting the pitch-changing gear box and the pitch-changing motor to rotate the large gear, thereby adjusting the gap between the small gear and the internal teeth of the bearing. By turning the handle clockwise or counterclockwise, the pitch gearbox can be flexibly rotated in different directions to adjust to the specified gear clearance.

Description of drawings

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the working state of adjusting the pitch system backlash by using the backlash adjusting device.

Fig. 2 is a schematic diagram of the gear meshing relationship of the pitch control system in Fig. 1 .

Fig. 3 is a schematic diagram of the cooperative relationship between the backlash adjusting device and the pitch control system in Fig. 1 .

Fig. 4 is a schematic structural diagram of the backlash adjusting device in Fig. 1 .

Detailed ways

As shown in FIG. 1 , the pitch system includes a casing 10 , a pitch bearing 1 , a pitch gearbox 2 accommodated in the casing 10 , and a fixing flange 5 .

Referring again to FIG. 2 , the pitch gearbox 2 includes a driving wheel and a driven wheel meshing with each other. Moreover, the driving wheel and the driven wheel are respectively meshed with internal teeth (not shown in the figure) of the pitch bearing 1 . FIG. 2 shows that the central axis of the driven wheel deviates from the central axis of the pitch bearing 1 .

As shown in FIG. 3 , the pitch gearbox 2 also includes an interface 29 provided on the driven wheel. The interface 29 is used for connecting to the pitch motor, here also used for connecting the backlash adjusting device 9 . The interface 29 is cylindrical extending along the central axis of the driven wheel, and has a flat slot (not shown) inside.

As shown in FIGS. 1 and 3 , the backlash adjustment device 9 is inserted into the interface 29 of the pitch gearbox 2 to manually rotate the driven wheel. The specific structure of the backlash adjusting device 9 is shown in FIG. 4 . The backlash adjusting device 9 includes a connection portion 90 , an insertion portion 92 vertically disposed on one side of the connection portion 90 , and a handle 94 vertically disposed on the other side of the connection portion 90 . The shape of the insertion part 92 matches the shape of the interface 29 of the aforementioned pitch gearbox 2 to drive the pitch gearbox 2 to rotate. A handle 94 can be inserted into one end of the connection part 90 , so that the connection 90 can be rotated by rotating the handle 94 , so that the driven wheel in the pitch gearbox 2 can be rotated through the insertion part 92 .

The process of using the backlash adjusting device 9 to adjust the backlash of the pitch system will be described in detail below. In the following description, the pinion portion inside the housing 10 is denoted by a driving wheel, and the pinion portion protruding out of the housing 10 (downward in FIG. 1 ) is denoted by 23A.

When adjusting, loosen the fixing flange 5, so that the driving wheel and the pitch bearing 1 are loosened (not meshed). After the backlash adjusting device 9 is inserted into the interface 29 of the driven wheel in the pitch gear box 2 , the driven wheel is driven to rotate in the pitch gear box 2 by rotating the handle 94 . The driven wheel rotates and drives the driving wheel to rotate. At this time, during the rotation process of the driving wheel and the driven wheel, the casing of the pitch gear box 2 is displaced. Because the fixed flange 5 has been loosened at this time, the displacement of the casing allows the gap between the drive wheel (23A) and the internal teeth of the pitch bearing to be adjusted. Driven by the driven wheel, the housing 10 with the inner teeth of the bearing can rotate in the direction opposite to the rotation direction of the pitch gear, so that the housing 10 deviates from the position before adjustment. Rotate the handle 94 to an appropriate angle to ensure that the gap between the drive wheel A and the internal teeth of the bearing measured with a feeler gauge meets the specified requirements, and then fix the fixed flange 5 . Since the housing 10 at this time has deviated from the position before adjustment, the gap between the driving wheel A and the bearing internal teeth has reached the required position (prescribed position). After the fixing flange 5 is fixed, the bearing internal teeth 1 and the bearing internal teeth The housing 10 is relatively fixed, so the gap between the driving wheel A and the inner teeth 1 of the bearing can be adjusted.

It can be seen that the utility model skillfully utilizes the interface between the pitch-changing gearbox 2 and the pitch-changing motor to rotate the large gear, thereby adjusting the gap between the pinion gear and the internal teeth of the bearing. The interface 29 provided on the driven wheel in the pitch gear box 2 is not only used for connecting with the pitch motor, but also used for adjusting the backlash between the pitch gear box and the pitch bearing. By turning the handle 94 clockwise or counterclockwise, the pitch gearbox can be flexibly rotated in different directions to adjust to the specified gear gap.

The pitch system and the backlash adjustment device of the wind power generating set with adjustable backlash provided by the utility model have been described above in detail. For those skilled in the art, any obvious changes made to the utility model without departing from the essential spirit of the utility model will constitute an infringement of the utility model patent and will bear corresponding legal responsibilities.

Claims (7)

1. wind generating set pitch control system that backlash is adjustable, comprise housing, be arranged on variable propeller gearbox in the housing, with the pitch variable bearings of described variable propeller gearbox engagement, and be used to make described pitch variable bearings to be fixed in or to break away from the fastening flange of described housing, it is characterized in that:

Described variable propeller gearbox has and is used for and becomes the interface that the oar motor is connected and is used to adjust the backlash of described variable propeller gearbox and described pitch variable bearings.

2. wind generating set pitch control system as claimed in claim 1 is characterized in that:

Described interface has the drum in the central axis direction extension of described variable propeller gearbox.

3. wind generating set pitch control system as claimed in claim 1 is characterized in that:

The small gear that described variable propeller gearbox comprises gearwheel and is used for meshing with described pitch variable bearings, described interface is arranged on the described gearwheel.

4. wind generating set pitch control system as claimed in claim 1 is characterized in that:

The central shaft of described gearwheel does not overlap with the central shaft of described pitch variable bearings.

5. a backlash regulating device is used for adjusting the backlash between wind generating set pitch control system variable propeller gearbox as claimed in claim 1 and the pitch variable bearings, it is characterized in that:

Described backlash regulating device has the insertion part that is used to insert described interface and is used to rotate the handle of described insertion part.

6. backlash regulating device as claimed in claim 5 is characterized in that:

Described insertion part has the shape that is complementary with described interface.

7. backlash regulating device as claimed in claim 5 is characterized in that:

Described backlash regulating device also has joint, and described insertion part is vertically set on a side of described joint, and described handle is vertically set on the opposite side of described joint.

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