CN206860363U - Wind generating set pitch control device and wind power generating set - Google Patents

Abstract

The utility model provides a wind turbine pitch changing device and a wind turbine generator set. The pitch changing device includes a disc drive structure, a crank, a connecting rod, a slider, a guide rail, and a drive motor. The disc drive structure is fixedly installed on The blade is perpendicular to the axis of the pitch bearing; one end of the crank is fixedly connected to the disc drive structure; one end of the connecting rod is hinged to the other end of the crank, and the connecting rod is located in the blade; the slider is hinged to the other end of the connecting rod; The guide rail is arranged on the hub and slides with the slide block; the drive motor drives the slide block to move along the guide rail. The utility model provides a wind turbine pitch changing device and a wind turbine set, which realizes the pitch changing of the wind turbine set and has a simple structure. At the same time, the pitch changing system is not driven hydraulically, and there is no problem of hydraulic oil leakage and replacement. The maintenance cost of wind turbine equipment is reduced, oil-resistant electrical equipment and cables are not required, and the adaptability of wind turbines is better.

Description

Wind turbine pitch device and wind turbine

technical field

The utility model relates to the field of wind power generating equipment, in particular to a pitch changing device of a wind power generating set and a wind generating set.

Background technique

A wind turbine is a mechanism that converts wind energy into electrical energy, and the pitch angle of the blades directly affects the wind energy absorbed by the wind turbine. During operation, the wind turbine needs to constantly adjust the blade pitch angle by judging the wind speed to ensure that the wind turbine is in an optimal operating state. The mechanism used to adjust the blade angle is the pitch mechanism.

A typical pitch mechanism is a hydraulic pitch mechanism, in which hydraulic pressure is used as the power source of the mechanism, and the hydraulic cylinder adjusts the pitch angle of the blades by pushing the drive plate connected to the pitch bearing. One end of the hydraulic cylinder is fixedly installed on the wheel hub, and the other end is installed on the driving disc. The adjustment of the pitch angle of the blades is realized through the expansion and contraction of the hydraulic cylinder.

The disadvantage of hydraulic pitch is that on the one hand, the cleaning, filtration and replacement of hydraulic oil increases the maintenance cost of wind turbines; The problem is that there is oil leakage in the pipeline and its joints in the hydraulic pitch change, which requires special protection for electrical equipment and cables, which increases the cost.

Utility model content

The utility model provides a pitch changing device of a wind power generator set and a wind power generator set, which solves the problems of high maintenance cost and easy leakage and oil seepage of hydraulic pipelines in the prior art that the wind power generator set adopts hydraulic pitch change.

On the one hand, the embodiment of the present utility model provides a pitch control device for a wind power generating set, which is used to control the pitch angle of the blades mounted on the hub, the blades are mounted on the hub through pitch bearings, and the wind power Generator set pitch device, including:

a disc drive structure fixedly mounted on the blade and perpendicular to the axis of the pitch bearing;

a crank, one end of which is fixedly connected to the disc drive structure;

a connecting rod, one end of the connecting rod is hinged to the other end of the crank, and the connecting rod is located in the blade;

The slider is hinged to the other end of the connecting rod;

a guide rail, arranged on the hub, and slidingly matched with the slider;

A driving motor drives the slider to move along the guide rail.

Optionally, when the outer ring of the pitch bearing is fixedly connected to the blade, the disc drive structure is fixedly mounted on the outer ring of the pitch bearing; when the inner ring of the pitch bearing is connected to When the blades are fixedly connected, the disc drive structure is fixedly installed on the inner ring of the pitch bearing.

Optionally, one end of the crank is fixedly connected to a position on the disc drive structure corresponding to the axis of the pitch bearing.

Optionally, the driving motor is a linear motor, and correspondingly, the guide rail is a linear guide rail.

Optionally, the linear motor is fixedly installed on the linear guide rail.

Optionally, the drive motor is a forward and reverse motor, the forward and reverse motor drives a lead screw, and the slider cooperates with the lead screw.

Optionally, the disc drive structure is disc-shaped.

Optionally, the disc drive structure is provided with reinforcing ribs radially distributed around the center.

Optionally, the disc drive structure is fixedly connected to the pitch bearing through bolts.

On the other hand, the embodiment of the present utility model also provides a wind power generating set, including the above-mentioned pitch control device of the wind power generating set.

The utility model provides a pitch changing device of a wind power generating set and a wind generating set, which realizes the pitch changing of the wind generating set, has a simple structure, and at the same time does not drive the pitch changing system through a hydraulic method, and there is no problem of hydraulic oil leakage and replacement. The maintenance cost of wind turbine equipment is reduced, oil-resistant electrical equipment and cables are not required, and the adaptability of wind turbines is better. Since the hydraulic control system is no longer used for driving, regular oil replacement is not required, and oil-resistant electrical equipment and cables are not required. , can be adapted to normal and low temperature units.

Description of drawings

Can understand the utility model better from the following in conjunction with accompanying drawing to the description of the specific embodiment of the utility model, wherein:

Other features, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Fig. 1 is a schematic structural diagram of a pitch control device for a wind power generating set provided by an embodiment of the present invention.

In the picture:

100, wheel hub;

300. Pitch bearing;

310, outer ring;

320, inner ring;

400. Wind turbine pitch control device;

410. Disk drive structure;

420, crank;

430, connecting rod;

440. slider;

450, guide rail;

460. Drive motor.

detailed description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The utility model is by no means limited to any specific configuration and algorithm proposed below, but covers any modification, replacement and improvement of elements, components and algorithms without departing from the spirit of the utility model. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of example embodiments. communicated to those skilled in the art. In the drawings, the thicknesses of regions and layers may be exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

As shown in Fig. 1, the embodiment of the present utility model provides a kind of wind power generating set pitch control device 400, is used for controlling the pitch angle of the blade (not shown in the drawing) that rotates and is installed on the wheel hub 100, and the blade passes through the pitch bearing 300 is installed on the hub 100, and the wind turbine pitch control device 400 includes:

The edge of the disc drive structure 410 is fixedly installed on the blade, and is perpendicular to the axis of the pitch bearing 300; the edge of the disc drive structure 410 can be fixed on the blade by means of screw connection, welding, riveting, etc. It is perpendicular to the axis of the pitch bearing 300, so that the disc drive structure 410 can provide support for the blades, and at the same time, in the process of driving the disc drive structure 410 by the crank 420, the disc drive structure 410 can support the blades in all directions. At the same time, a torque is applied to promote the pitching rotation of the blade relative to the hub 100;

One end of the crank 420 is fixedly connected to the disc drive structure 410, so that the crank 420 will not move relative to the disc drive structure 410, so that the disc drive structure 410 can be better controlled to drive the blades to pitch;

One end of the connecting rod 430 is hinged to the other end of the crank 420, and the connecting rod is located in the blade. Through the hinged connection between the connecting rod 430 and the crank 420, the crank 420 can be driven to rotate by the drive of the connecting rod;

The slider 440 is hinged to the other end of the connecting rod 430, and the slider 440, the connecting rod 430 and the crank 420 form a crank slider structure, so that the movement of the slider 440 can drive the crank 420 to rotate, and then drive the disc drive structure 410 Drive the blades to do pitch rotation;

The guide rail 450 is arranged on the hub 100 and is slidably matched with the slider 440. The guide rail 450 is used to provide support for the slider 440 and provide guidance for the movement of the slider 440 so that the slider 440 can move along the guide rail 450;

The drive motor 460 drives the slide block 440 to move along the guide rail 450. The drive motor 460 is used to provide power for the blades to rotate. bar) to drive.

When the wind turbine pitch control device 400 is working, the drive motor 460 drives the slider 440 to move along the guide rail 450, and the slider 440 drives the crank 420 to rotate through the connecting rod 430 during the movement along the guide rail 450. Since the crank 420 It is fixedly connected with the disc drive structure 410, so that the crank 420 can drive the disc drive structure 410 to rotate, and control the pitch of the blades.

The pitch changing device of the wind power generating set provided by the embodiment of the utility model realizes the pitch changing of the wind power generating set, has a simple structure, and does not drive the pitch changing system through a hydraulic method at the same time, there is no problem of hydraulic oil leakage and replacement, and the wind force is reduced. The maintenance cost of generator set equipment does not require oil-resistant electrical equipment and cables, and the wind turbine has better adaptability. Since it is no longer driven by a hydraulic control system, it does not need to change oil regularly, and oil-resistant electrical equipment and cables are not required. For normal and low temperature units.

Optionally, in the pitch control device 400 of the wind power generating set provided by the embodiment of the present utility model, the disc drive structure 410 is fixedly installed on the bearing ring fixedly connected with the blade in the pitch bearing 300, and the bearing ring can be a part of the pitch bearing. The outer ring can also be the inner ring of the pitch bearing; through the connection with the pitch bearing 300, the disc drive structure 410 can drive the blade to rotate, and can provide support for the pitch bearing 300, so that the pitch bearing 300 operation is more stable.

Optionally, in the pitch control device 400 of the wind power generator set provided by the embodiment of the present invention, there are two possibilities for the connection between the blade and the pitch bearing 300, that is, it may be the outer ring of the pitch bearing, or it may be the variable pitch bearing. The inner ring of the pitch bearing, when the outer ring 310 of the pitch bearing 300 is fixedly connected to the blade, the disc drive structure 410 is correspondingly connected to the outer ring 310 of the pitch bearing 300; when the inner ring 320 of the pitch bearing 300 is connected to the blade When fixedly connected, the disc drive structure 410 is connected with the inner ring 320 of the pitch bearing 300 .

Optionally, in the wind turbine pitch control device 400 provided by the embodiment of the present utility model, one end of the crank 420 is fixedly connected to the position of the axis of the pitch bearing 300 on the disc drive structure 410, so that the crank 420 drives the disc drive structure The position of 410 corresponds to the axis of the pitch bearing 300. When the disc drive structure 410 drives the blade under force, the drive force of the disc drive structure 410 in all directions with the blade (especially the pitch bearing 300 connected to the blade) equal, so as to reduce the deformation of the blade (and the pitch bearing 300 connected to the blade), thereby making the pitch rotation of the blade more stable, thereby prolonging the service life of the entire pitch bearing 300 .

Optionally, in the pitch control device 400 for wind power generators provided by the embodiment of the present utility model, the drive motor 460 is a linear motor, and correspondingly, the guide rail 450 is a linear guide rail, and the two ends of the linear guide rail are fixedly installed on the hub 100 for Provide stable support for the slider 440; the linear motor should also be fixed on the hub 100, so that the linear motor can provide driving force for the slider, so that the slider 440 drives the crank 420 driven by the linear motor.

Optionally, in the pitch control device 400 for wind power generators provided by the embodiment of the present utility model, the linear motor is fixedly installed on the linear guide rail, and the driving direction of the linear motor is the same as that of the linear guide rail, so that the linear motor can drive the slider 440 along the linear guide rail. , to provide a greater driving force for the slider.

Optionally, in the pitch control device 400 of the wind power generating set provided by the embodiment of the present utility model, the drive motor 460 is a forward and reverse motor, and the forward and reverse motor drives the lead screw, and the slider cooperates with the lead screw. The driving motor 460 in this embodiment adopts a forward and reverse motor, which is different from a linear motor in that the forward and reverse motor can only provide rotation and cannot be directly driven in a straight line. In order to convert the rotation of the forward and reverse motor into a straight line The linear drive in the direction needs to connect the rotating shaft of the forward and reverse motor with the lead screw, and drive the slider on the lead screw to do linear motion through the rotation of the lead screw, thus completing the pitch drive.

Optionally, in the pitch control device 400 for wind power generators provided by the embodiment of the present utility model, the disc drive structure 410 is in the shape of a disc. Based on the understanding of those skilled in the art, the disc drive structure 410 may be in the shape of a regular disc or an irregular disc. disk; even several hollow structures can be set on the disk to reduce the weight of the disk.

Optionally, in the pitch control device 400 of the wind power generating set provided by the embodiment of the present utility model, the disc drive structure 410 is provided with reinforcing ribs radially distributed around the center. Through the setting of the reinforcing ribs, the disc driving structure 410 can provide a more stable supporting function, and the anti-deformation capability of the disc driving structure 410 itself can be improved.

Optionally, in the pitch control device 400 for wind power generators provided by the embodiment of the present utility model, the disc drive structure 410 is fixedly connected to the pitch bearing 300 through bolts, and correspondingly, bolts need to be processed on the edge of the disc drive structure 410 hole. Connecting the disc drive structure 410 directly to the pitch bearing 300 through bolts can make the connection between the disc drive structure 410 and the pitch bearing 300 more stable, and there is no need to separately design corresponding connecting parts for connecting the disc drive structure 410 .

The embodiment of the present utility model also provides a wind power generating set, including the wind power generating set pitch changing device 400 provided in the above embodiment, which is set for each blade of the wind generating set (usually three blades are installed on a hub of a generating set) For a pitch control device 400 of a wind power generating set, a corresponding control system can be designed to control the three blades to simultaneously pitch and rotate.

The wind power generation unit provided by the embodiment of the utility model realizes the pitch change of the wind power generation unit, has a simple structure, and at the same time does not drive the pitch system through a hydraulic method, there is no problem of hydraulic oil leakage and replacement, and the wind power generation unit equipment is reduced. Low maintenance cost, no need for oil-resistant electrical equipment and cables, better adaptability of wind turbines, because no longer use hydraulic control system to drive, no need to replace oil regularly, no oil-resistant electrical equipment and cables, can be adapted to normal and low temperature unit.

Those skilled in the art should understand that the above-mentioned embodiments are illustrative rather than restrictive. Different technical features in different embodiments can be combined to achieve beneficial effects. Those skilled in the art should be able to understand and implement other modified embodiments of the disclosed embodiments on the basis of studying the drawings, specification and claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to indicate names rather than to indicate any specific Order. Any reference signs in the claims should not be construed as limiting the scope. The functions of several parts appearing in the claims can be realized by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to obtain beneficial effects.

Claims (10)

1. A kind of 1. wind generating set pitch control device (400), for controlling the pitch for the blade being rotatably installed on wheel hub (100) Angle, the blade are arranged on the wheel hub (100) by pitch variable bearings (300), it is characterised in that the wind power generating set Vane change device (400), including：

   Disc type driving structure (410), the blade is fixedly installed in, and it is vertical with the axis of the pitch variable bearings (300)；

   Crank (420), one end of the crank (420) are fixedly connected on the disc type driving structure (410)；

   Connecting rod (430), one end of the connecting rod (430) and the other end of the crank (420) are hinged, connecting rod (430) position In in the blade；

   Sliding block (440), it is hinged with the other end of the connecting rod (430)；

   Guide rail (450), it is arranged on the wheel hub (100), is slidably matched with the sliding block (440)；

   Motor (460), the sliding block (440) is driven to be moved along the guide rail (450).
2. 2. wind generating set pitch control device (400) as claimed in claim 1, it is characterised in that when the pitch variable bearings (300) when outer ring (310) is fixedly connected with the blade, the disc type driving structure (410) is fixedly mounted on the change oar On the outer ring (310) of bearing (300)；When the inner ring (320) of the pitch variable bearings (300) is fixedly connected with the blade When, the disc type driving structure (410) is fixedly mounted on the inner ring (320) of the pitch variable bearings (300).
3. 3. wind generating set pitch control device (400) as claimed in claim 1 or 2, it is characterised in that the crank (420) One end be fixedly connected on the position of the axis that the pitch variable bearings (300) are corresponded on the disc type driving structure (410).
4. 4. wind generating set pitch control device (400) as claimed in claim 1 or 2, it is characterised in that the motor (460) it is linear electric motors, accordingly, the guide rail (450) is line slideway.
5. 5. wind generating set pitch control device (400) as claimed in claim 4, it is characterised in that the linear electric motors are fixed On the line slideway.
6. 6. wind generating set pitch control device (400) as claimed in claim 1 or 2, it is characterised in that the motor (460) it is clockwise and anticlockwise motor, the clockwise and anticlockwise motor drives leading screw, and the sliding block coordinates with the leading screw.
7. 7. wind generating set pitch control device (400) as claimed in claim 1 or 2, it is characterised in that the disc type driving knot Structure (410) is in the form of annular discs.
8. 8. wind generating set pitch control device (400) as claimed in claim 7, it is characterised in that the disc type driving structure (410) it is provided with the reinforcement to be radially distributed around center.
9. 9. wind generating set pitch control device (400) as claimed in claim 7, it is characterised in that the disc type driving structure (410) it is fixedly connected at by bolt on the pitch variable bearings (300).
10. 10. a kind of wind power generating set, including the wind generating set pitch control device (400) described in one of claim 1-9.