CN217152175U - Wind generating set - Google Patents

Abstract

The utility model provides a wind generating set, wind generating set includes the pylon, installs the head assembly in the pylon upper end and installs the driftage system between pylon upper end and head assembly, head assembly includes the frame and installs two at least aircraft noses in the frame, the driftage system is including installing the lower extreme of frame with slidingtype driftage bearing between the top of pylon. By adopting the sliding type yaw bearing, the load capacity of the yaw system can be improved, and the manufacturing and maintenance cost of the yaw system is reduced.

Description

Wind generating set

Technical Field

The utility model relates to a wind power generation technical field, concretely relates to wind generating set.

Background

With the rapid development of global economy, the demand for energy is increasing. However, the contradiction between the continuous development of energy and environmental pollution is also highlighted. Wind energy resources are endless, the cost is low, countries in the world, especially developed countries, pay high attention to wind power development, and wind power generation is used as an important means for effectively solving environmental pollution and achieving the goals of environmental protection and sustainable development. The wind generating set is an important device for obtaining electric energy by using wind energy, which is a renewable clean energy source, and the application scale and installed capacity of the wind generating set are also continuously increased so as to improve the generating efficiency of a single wind generating set.

However, with the increase of the installed capacity of the wind generating set, the diameter of the wind wheel and the tower of the wind generating set are also larger and larger, the manufacturing difficulty, the manufacturing cost, the transportation cost and the hoisting difficulty are increased, the yawing structure and the control of the set are more and more complex, and the maintenance difficulty and the maintenance cost of the components in the operation process of the set are also increased.

Therefore, how to provide a wind generating set which can improve the generating efficiency of a single wind generating set and reduce the manufacturing cost and the maintenance difficulty becomes a technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide a wind generating set which is provided with two machine heads, adopts a yaw bearing and a sliding bearing, improves the generating efficiency of the wind generating set, and simultaneously ensures that the manufacturing cost and the operation and maintenance difficulty of the wind generating set are reduced.

According to an aspect of the present invention, there is provided a wind turbine generator system, the wind turbine generator system includes a tower, a head assembly installed at an upper end of the tower, and a yaw system installed between the upper end of the tower and the head assembly, the head assembly includes a frame and at least two heads installed in the frame, the yaw system includes an installation of a lower end of the frame and a yaw ring gear between a top end of the tower and a first sliding pad located on an upper surface or a lower surface of the yaw ring gear.

According to the utility model discloses an aspect, the frame is in including connecting the base and setting connect two at least connection branch on the base, two at least aircraft noses are installed respectively connect on the branch.

According to an aspect of the utility model, the aircraft nose with connecting branch sets up to two respectively, two aircraft noses are in the horizontal direction about the pylon symmetrical arrangement is two connecting branch is last.

According to an aspect of the present invention, the two heads are arranged to be the same in the wind direction; the wind sweeping surfaces of the impellers of the two machine heads are mutually separated; or the windward surfaces of the two impellers are partially overlapped and the rotation phase angles are different.

According to the utility model discloses an aspect, radial one side of driftage ring gear is provided with tooth portion, the driftage system still includes driftage drive unit, the driftage drive unit is installed driftage ring gear one side, the pinion that the driftage drive unit includes yaw motor and is connected with yaw motor, the pinion with tooth portion meshing.

According to an aspect of the utility model, the driftage system still includes driftage brake caliper, driftage brake caliper with the drive unit that drifts off sets up relatively the radial opposite side of ring gear that drifts off.

According to an aspect of the utility model, the driftage system still includes second sliding pad and third sliding pad, driftage brake caliper includes the pincers body and the pincers body down, the second sliding pad sets up the face of the pincers body or the pincers body down on the side surface of driftage ring gear, the third sliding pad is installed on the upper surface of the pincers body down, and face the lower surface of driftage ring gear.

According to the utility model discloses an aspect, the interior week of driftage ring gear is provided with tooth portion, the drive unit that drifts away include the yaw motor and with the pinion of yaw motor's output shaft, the pinion with tooth meshing, driftage brake caliper is located the periphery side of driftage ring gear.

According to the utility model discloses an aspect, the periphery of driftage ring gear is provided with tooth portion, the drive unit that drifts away include the yaw motor and with the pinion of yaw motor's output shaft, the pinion with tooth portion meshing, driftage brake caliper is located the inboard of driftage ring gear.

According to the utility model discloses an aspect, driftage ring gear fixed mounting be in the top of pylon, be provided with on the upper surface of driftage ring gear along a plurality of mounting grooves that the circumferencial direction of driftage ring gear evenly arranged, it is a plurality of first slip pad is installed respectively in a plurality of among the mounting groove, the drive unit that drifts is installed connect on the base, driftage brake caliper fixed connection to connect the lower surface of base

According to the utility model discloses an aspect, driftage ring gear fixed mounting be in connect on the lower surface of base, be provided with on the lower surface of driftage ring gear along a plurality of mounting grooves that the circumferencial direction of driftage ring gear evenly arranged, it is a plurality of first slip pad is installed respectively in a plurality of among the mounting groove, the drive unit that drifts with driftage brake caliper fixed connection to on the pylon.

According to the utility model discloses a wind generating set has realized the increase of whole unit installed capacity through adopting a plurality of aircraft noses to through adopting slide bearing as driftage bearing, improved the bearing capacity of driftage structure to aircraft nose subassembly and reduced the manufacturing and the maintenance cost of whole unit.

Drawings

FIG. 1 is a schematic structural view of a wind turbine generator system according to an embodiment of the present application;

FIG. 2 is a schematic view of a yaw system of a wind park according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of an outboard yaw system according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of an in-built yaw system according to an embodiment of the present application;

FIG. 5 is a plan view of a yaw ring gear according to an embodiment of the present application.

Reference numerals:

100-a tower; 110-connecting bolts; 200-a nose assembly; 210-a rack; 212-a connection base;

213-yaw motor; 214-connecting struts; 220-a machine head; 300-a yaw system;

310-a yaw drive unit; 314-a pinion gear; 322-yaw gear ring; 324-a mounting groove;

412-a first sliding gasket; 414-a second slip liner; 416-a third slip liner;

500-yaw brake caliper; 512-upper clamp body; 514-lower clamp body; 516-an adjustment section;

518-fastening bolts.

Detailed Description

Although the wind energy capture amount can be increased to a certain extent by enlarging the diameter of the impeller of the wind generating set, the generating efficiency of a single set is improved. However, as the diameter of the impeller increases, the manufacturing cost and the transportation difficulty of the blades and the operation cost and the maintenance cost of the later unit also increase correspondingly. Therefore, although the amount of power generation obtained by increasing the capacity of a single machine increases, the overall economic cost tends to increase.

Therefore, in order to improve the power generation efficiency and ensure the economic benefit, the application provides a multi-engine-head wind generating set. As shown in FIG. 1, the wind turbine includes a tower 100, a nose assembly 200 mounted at an upper end of the tower 100, and a yaw system 300 mounted between the upper end of the tower 100 and the nose assembly. Handpiece assembly 200 includes a frame 210 and at least two handpieces 220 mounted on frame 210. By providing a plurality of heads 220, an increase in the power generating capacity of a single unit can be ensured. The yaw system 300 is mounted between the bottom end of the frame 210 and the top end flange of the tower 100 by driving the frame 210 to rotate relative to the tower 100 while controlling the rotational yaw of the head assembly 200.

Each handpiece 220 in the handpiece assembly 200 can employ a relatively small scale generator unit, thereby reducing the size of the individual impeller, nacelle, and generator. And in the case of overall size reduction, the difficulty and cost of manufacturing, transporting, hoisting and maintaining can be correspondingly reduced.

Each power generation unit may include a nacelle, a generator disposed in or outside the nacelle, and an impeller coupled to a rotating shaft of the generator. Compared with the machine head arranged on the tower, the wind power generation device has the advantages that the wind power generation efficiency of a single machine set can be improved, the difficulty and the cost of manufacturing, installing, transporting and maintaining the whole machine set can be reduced, and the overall economic benefit is improved by installing the at least two machine heads 220 on the tower and capturing wind power for power generation. In addition to the unified yaw control mentioned below, each head can be independently controlled to capture wind energy for power generation, increasing control flexibility. When one of the machine heads is in fault shutdown, the other machine heads can still normally and independently operate, and the operation reliability of the machine set is improved.

According to an aspect of the present invention, the frame 210 includes a connection base 212 and at least two connection struts 214 disposed on the connection base 212, and at least two handpieces 220 are respectively mounted on the connection struts 214. In the following, embodiments of the present invention will be described with reference to the handpiece assembly shown in fig. 1 including two handpieces as an example. However, the solution of the present invention is not limited thereto, and the following description is equally applicable to more than two solutions of the handpiece.

As shown in fig. 1, two connecting struts 214 are disposed on the connecting base 212, and two handpieces 220 are disposed on the two connecting struts 214, respectively. The direction of the wind may be the same for both heads 220. The windswept surfaces of the impellers of the two heads 220 may be spaced from each other to avoid interference of the two impellers with each other. In addition, the wind sweeping surfaces of the two impellers can also be partially overlapped, and in this case, the blades of the two impellers are staggered from each other through the rotation phase angles of the two impellers, so that mutual interference is avoided.

The two handpieces 220 can be independently controlled. However, in general, the two handpieces 220 are in the same wind field condition, and the two handpieces 220 can be simultaneously operated in yaw and wind directions, so that the problems of complicated structure and increased cost caused by respectively controlling each of the handpieces 220 can be avoided. In the embodiment of the present application, as shown in fig. 2, a yaw system 300 is provided for unified yaw control of the two handpieces 220.

In order to realize the yaw operation of the machine head, the machine head assembly is rotatably connected with the tower barrel through a yaw bearing. In the yaw system of the wind generating set in the prior art, a rolling bearing is mostly adopted. The yaw system adopting the rolling bearing has the advantages of high corresponding speed, small yaw driving force and the like. However, under the condition that the double machine heads are arranged, along with the increase of the yaw load, the size of the rolling bearing is correspondingly increased, the processing difficulty is high, and the manufacturing and transportation cost is high. The rolling bearing basically has point contact or line contact among all parts, and the contact pressure between the inner ball or roller and the raceway is high, so the rolling bearing is very sensitive to overload and is easy to generate fatigue damage. Therefore, the rolling bearing has the problems of small bearing capacity and easy damage. Once the rolling bearings are damaged, they need to be replaced in their entirety and the entire superstructure above the yawing system needs to be disassembled, which is difficult and costly to maintain. In addition, the requirement on an external braking structure is high due to the small internal friction of the rolling bearing. Therefore, the braking system of the rolling bearing type yaw system is complicated in structure.

In the case of the present application where multiple heads are used to increase installed capacity, the weight of the entire head assembly is also correspondingly increased. However, the yawing system using the rolling bearing is difficult to bear the weight of the large-capacity unit head and cannot meet the requirement of high bearing capacity caused by the increase of the yawing load. In addition, the yaw system adopting the rolling bearing is difficult to maintain later, and particularly, the service life of a gasket on the yaw brake is short and the replacement is extremely difficult.

Therefore, the yaw system of the wind generating set according to the application adopts the sliding bearing structure to solve the technical problems existing in the rolling bearing. Compared with a rolling bearing, the sliding bearing has the advantages of simple structure, low manufacturing cost, strong bearing capacity, difficulty in damage, low maintenance cost, no need of installing a brake disc, relatively simple assembly and the like, and can meet the requirements of the double-head structure in various aspects such as large bearing capacity and the like.

The yaw system may be classified into an outer-driven yaw system and an inner-driven yaw system according to whether the yaw driving unit 310 is disposed outside or inside the yaw ring gear. Fig. 3 shows a cross-sectional view of the inner driven yawing system, and fig. 4 shows a cross-sectional view of the outer driven yawing system. FIG. 5 illustrates a plan view of a yaw ring gear according to an embodiment of the present application.

As shown in fig. 3 and 4, the yaw system 300 includes a yaw ring 322, a yaw drive unit 310, and a first sliding pad 412. Yaw ring gear 322 is mounted between the lower end of frame 210 and the top end of tower 100, and first sliding pad 412 is located on the upper or lower surface of yaw ring gear 322, constituting a sliding bearing structure together with yaw ring gear 322. The entire weight of the head assembly is supported by first sliding pad 412 during operation of the stack and during yawing. The supporting area of the machine head assembly is increased through the first sliding gasket 412, and the bearing energy of the yaw bearing is improved. In addition, stability of the yawing process is improved due to surface contact between the first sliding pad 412 and the relatively rotating member.

The basic structure of the inner-drive yaw system and the outer-drive yaw system may be the same except for the position of the yaw drive unit 310 and the arrangement position of the teeth on the yaw ring gear. Thus, the structure of the inner driven yaw system described below in connection with fig. 3 is equally applicable to the outer driven yaw system of fig. 4, and correspondingly, the structure of the outer driven yaw system described in fig. 4 is also applicable to the inner driven yaw system of fig. 3. In order to make the description more concise, only the structures shown in fig. 3 and 4 are described, and other structures which can be modified are not set forth.

In the internal driving type yawing structure shown in fig. 3, the yawing ring 322 is fixedly connected to the tower top flange of the tower 100, and for example, the yawing ring 322 may be connected to the tower top flange of the tower 100 by the high-strength connecting bolts 110. The radially inner side of the yaw ring gear 322 is provided with a toothed portion for receiving the driving force of the yaw driving unit 310. The yaw driving unit 310 is mounted on the connection base 212 of the frame 210 and is located radially inward of the yaw ring gear 322 for coupling with the teeth of the yaw ring gear 322. Yaw drive unit 310 includes a yaw motor 312 and a pinion 314 coupled to an output shaft of yaw motor 312. The yaw motor 312 may be disposed above the coupling base 212, and an output shaft of the yaw motor 213 may be coupled to a pinion 314 through a reducer, the pinion 314 being located below the coupling base 212 and engaged with a tooth portion of the yaw ring 322 inside the yaw ring 322. When the yaw motor 312 drives the pinion 314 to rotate, since the yaw ring 322 is fixed, the pinion 314 rolls relative to the teeth of the yaw ring 322, thereby rotating the connection base 212 relative to the tower 100, and adjusting the wind direction of the head assembly 200. The yaw driving unit 310 may be provided in plurality, symmetrically arranged along a circumferential direction of the yaw ring gear 322, for applying a uniform and stable yaw driving force to the head assembly 200.

According to an aspect of the present invention, the first sliding pad 412 may be integrally provided as one along the circumference of the yaw ring gear, thereby uniformly supporting the head assembly 200 in the circumferential direction. In the example of the present application, in order to facilitate replacement of the first sliding pad 412, the first sliding pad 412 is provided in plurality, and the plurality of first sliding pads 412 are provided between the yaw ring gear 322 and the connection base 212. As an example, the first sliding pad 412 may be fixedly mounted on the upper surface of the yaw ring gear 322 such that the upper surface of the first sliding pad 412 is in sliding contact with the lower surface of the connection base 212 to support the entire head assembly 200. However, the present invention is not limited thereto, and the first sliding pad 412 may be fixed to the connection base 212 such that the lower surface of the first sliding pad 412 is in sliding contact with the upper surface of the yaw ring gear 322.

In the example of the present application, the first sliding pad 412 is fixedly provided on the upper surface of the yaw ring gear 322. To facilitate the mounting positioning of the first sliding pad 412, the upper surface of the yaw ring gear 322 is provided with a plurality of mounting grooves 324, the lower portion of the first sliding pad 412 is fitted into and fixed to the mounting grooves 324, and the upper portion of the first sliding pad 412 protrudes with respect to the upper surface of the yaw ring gear 322. A plurality of first sliding pads 412 are evenly distributed along the upper surface of yaw ring 322 to maintain a balanced support for handpiece assembly 200 during rotation of handpiece assembly 200 relative to yaw ring 322. By fixedly mounting the first sliding pad 412 on the upper surface of the yaw ring gear 322, it is convenient to replace one of the first sliding pads 412 after the handpiece assembly 200 is partially jacked up.

According to the utility model discloses an aspect can apply lubricating grease on first slip liner 412, through pouring into lubricating grease into, can effectively reduce the wearing and tearing of liner, and increase of service life reduces liner change frequency. In addition, by adding lubricating grease, vibration and jumping phenomena caused by friction between the first sliding gasket 412 and the yawing ring gear 322 can be relieved, so that the yawing precision is further improved, the maintenance frequency of the yawing system is reduced, and the service life of the yawing system is prolonged.

The yawing system according to an embodiment of the application, further comprising a yaw brake caliper 500. The yaw brake caliper 500 is disposed at the other side of the yaw ring 322 opposite to the yaw driving unit. In the example shown in FIG. 3, yaw brake caliper 500 is disposed radially outward of yaw ring 322. The yaw brake caliper 500 is fixed to a lower surface of the connection base 212 by fastening bolts 518, and forms a clamping groove between the yaw brake caliper 500 and the connection base 212, in which an outer circumference of the yaw ring 322 is seated to restrain the yaw ring 322 and apply a braking torque.

According to an aspect of the present invention, the yaw brake caliper 500 includes the upper caliper body 512 and the lower caliper body 514, the corresponding positions of the upper caliper body 512 and the lower caliper body 514 are provided with bolt holes, and the fastening bolt 518 is fastened to the connection base 212 after passing the upper caliper body 512 from the lower direction of the lower caliper body 514. The lower caliper body 514 has a greater width than the upper caliper body 512 such that the yaw brake caliper 500 is formed substantially in an L-shape. The portion of the lower caliper body 514 protruding in the horizontal direction with respect to the upper caliper body 512 is formed as a clamp portion, and the clamp portion is located on the lower surface of the outer peripheral edge of the yaw ring gear 322. By clamping the yaw ring gear 322 from the lower portion and the side portion by the yaw brake caliper 500, the head assembly 200 can be prevented from overturning with respect to the yaw ring gear 322.

The yawing system according to an embodiment of the application, further comprising a second sliding pad 414 and a third sliding pad 416. The second sliding pad 414 is provided between the side of the upper caliper body 512 and the side surface of the yaw ring gear 322. The second sliding pad 414 may be mounted on the upper caliper body 512, or may be mounted on a side surface of the yaw ring gear 322. The side surface of the lower clamp body 514 maintains a predetermined gap from the tower 100 to prevent interference with the side wall of the tower 100 during yaw rotation of the random head assembly 200. In the embodiment of the present application, in order to facilitate installation and replacement of the second sliding pad 414, the second sliding pad 414 is fixedly disposed on the sidewall of the upper caliper body 512. In the example shown in fig. 3, the second sliding pad 414 is fixedly provided on the radially inner side wall of the upper caliper body 512, and is in frictional contact with the outer peripheral surface of the yaw ring gear 322. By supporting the head assembly 200 from the side up, the operational stability of the head assembly 200 during yawing is ensured.

According to an aspect of the present invention, a third sliding pad 416 is provided on the clamping portion of the lower clamp body 514. More specifically, the jaw portion may be provided with a mounting hole opened upward, the adjustment portion 516 being mounted in the mounting through hole, and the lower end of the third sliding pad 416 being connected to an upper portion of the adjustment portion 516. The adjustment portion 516 can adjust the protruding length of the third slide spacer 416, thereby adjusting the amount of pressure applied to the yaw ring gear 322. By way of example, adjustment portion 516 may be a hydraulic cylinder and third slide washer 416 may be coupled to a piston of the hydraulic cylinder, with the degree of extension of third slide washer 416 being adjusted by adjusting the pressure of the hydraulic oil. Under the condition that the unit is fixed in a certain wind direction, the piston pushes the third sliding pad 416 upwards to move upwards, the extrusion force is converted into the braking torque of the unit 200, the yaw gear ring 322 is clamped between the first sliding pad 412 and the third sliding pad 416, and the wind generating set is enabled to keep the azimuth angle required in the power generating state. When the yaw is needed, the hydraulic oil cylinder is depressurized, the piston moves downwards to reach the damping moment needed by the stable rotation of the nose assembly 200, the stable rotation of the nose assembly 200 is ensured, and the yaw gear ring 322 is clamped and positioned when the yaw reaches the target azimuth angle. Further, the adjustment portion 516 may be an adjustment bolt, and the braking torque applied by the third sliding pad 416 is adjusted by controlling the extension length of the adjustment bolt.

Oil grooves can be formed in the second sliding gasket 414 and the third sliding gasket 416, so that the abrasion of the gaskets can be effectively reduced by injecting lubricating grease, the service life of the gaskets is prolonged, and the replacement frequency of the gaskets is reduced.

According to the utility model discloses an embodiment, driftage system 300 includes first sliding liner 412, second sliding liner 414, third sliding liner 416 simultaneously, and three sliding liner contacts with the three surface of driftage ring gear 322 respectively, is equivalent to and forms sliding friction surface on the three surface of driftage ring gear 322, has guaranteed the steady realization of driftage process.

FIG. 4 shows a schematic cross-sectional view with the yaw drive unit outboard. The outer periphery of the yaw ring gear 322 is formed with teeth, and the pinion 314 of the yaw driving unit 310 mounted on the outer side of the yaw ring gear 322 is engaged with the teeth of the yaw ring gear 322. Yaw brake caliper 500 is attached to connection base 212 inside yaw ring 322, and limits and brakes yaw ring 322 from the inner peripheral side. In this embodiment, by arranging the yaw driving unit externally, more space can be reserved for installing the tower internal components.

The configuration of the yawing system shown in fig. 4 is substantially the same as that of the yawing system shown in fig. 3, and differs from that of the yawing system shown in fig. 3 in the arrangement position of the second sliding pads 414.

In the yaw system of the present embodiment, the side surface of the upper caliper body 512 maintains a predetermined gap from the yaw ring 322, and the second and third sliding pads 414 and 416 are mounted on the lower caliper body 514. Specifically, the second sliding pad 414 is mounted on a side surface of the clamping portion of the lower clamp body 514, facing and contacting the yaw ring gear 322. An upper open mounting hole is provided in the clamping portion, an adjustment portion 516 is located in the mounting hole, and a third sliding pad 416 is fixedly provided at an upper end of the adjustment portion 516, so that the braking torque applied by the yaw brake caliper 500 can be adjusted by the adjustment portion 516.

In the previously described embodiment, the yaw ring gear 322 is fixedly mounted on the tower 100, while the yaw drive unit and the yaw brake caliper 500 are mounted on the connection base 212. However, the yaw system mounting structure is not limited thereto, and the mounting positions of the two may be interchanged. In other alternative embodiments, yaw ring gear 322 may be mounted on connection base 212, and yaw drive unit 310 and yaw brake caliper 500 may be mounted on tower 100. In this case, the first sliding pad 412 may be mounted between the lower surface of the yaw ring gear 322 and the top end of the tower 100, for example, on the lower surface of the yaw ring gear 322, or on the top end flange of the tower 100. By adopting the structure, corresponding technical effects can be obtained.

According to the scheme of the application, the manufacturing cost and the maintenance cost of the yaw system can be reduced by adopting the sliding type yaw bearing. Even under the condition that each sliding gasket needs to be replaced after being worn, the whole upper structure does not need to be disassembled, and the sliding gasket can be conveniently replaced.

Specifically, when the first sliding pad 412 needs to be replaced, the replacement of the first sliding pad 412 can be performed by loosening the fastening bolt 518 of the yaw brake caliper 500 and partially jacking up the connection base 212 of the head assembly using the jacking mechanism without disassembling the entire head assembly. When it is necessary to replace the second sliding pad 414 and the third sliding pad 416, the fastening bolts 518 may be loosened for replacement without disassembling the head assembly 200.

In addition, through adopting slidingtype yaw bearing, can provide higher frictional force, be more favorable to braking and spacing the aircraft nose subassembly to external load on the yaw gear has been reduced. In particular, when the handpiece assembly normally runs, external aerodynamic force can be effectively counteracted, and the handpiece assembly is prevented from deviating from the expected optimal wind direction.

By using a sliding yaw bearing, the unit can be allowed to withstand large overloads and transient deflections of the mounting surface, and large compression forces generated by overloads and transient deflections can be absorbed without being damaged.

Furthermore, the slip liner allows for greater tolerances (less flatness) of the mounting surface and slip fit surface, which can reduce manufacturing and mounting requirements, thereby reducing overall unit cost and increasing overall unit economy.

Although specific examples of the present invention have been described with reference to the accompanying drawings, the aspects of the present invention are not limited thereto, and those skilled in the art can make variations or modifications on the foregoing embodiments without departing from the spirit and scope of the present invention.

Claims (10)

1. A wind park comprising a tower (100), a head assembly (200) mounted at an upper end of the tower (100), and a yaw system (300) mounted between the upper end of the tower (100) and the head assembly (200), characterized in that the head assembly (200) comprises a frame (210) and at least two heads (220) mounted on the frame (210), the yaw system (300) comprising a yaw gear ring (322) mounted between a lower end of the frame (210) and a top end of the tower (100) and a first sliding pad (412) located on an upper or lower surface of the yaw gear ring (322).

2. Wind park according to claim 1, wherein the frame (210) comprises a connection base (212) and at least two connection struts (214) arranged on the connection base (212), the at least two machine heads (220) being mounted on the connection struts (214), respectively.

3. Wind park according to claim 2, wherein the machine head (220) and the connecting strut (214) are provided in two, respectively, the two machine heads (220) being arranged symmetrically in the horizontal direction with respect to the tower (100) on the two connecting struts (214).

4. A wind park according to claim 3, wherein the two headpieces (220) are arranged to be the same for the wind direction;

the wind sweeping surfaces of the impellers of the two machine heads are mutually separated; or the windward surfaces of the two impellers are partially overlapped and the rotation phase angles are different.

5. Wind park according to claim 2, wherein a radial side of the yaw gear ring (322) is provided with teeth, the yaw system (300) further comprising

A yaw driving unit (310), the yaw driving unit (310) being installed at a side of the yaw ring gear (322), the yaw driving unit (310) including a yaw motor (312) and a pinion gear (314) connected to the yaw motor, the pinion gear (314) being engaged with the teeth.

6. Wind park according to claim 5, wherein the yaw system (300) further comprises a yaw brake caliper (500), the yaw brake caliper (500) being arranged opposite the yaw drive unit (310) on a radially other side of the yaw ring gear (322).

7. Wind park according to claim 6, wherein the yaw system further comprises a second sliding pad (414) and a third sliding pad (416), the yaw brake caliper (500) comprising an upper caliper body (512) and a lower caliper body (514), the second sliding pad (414) being provided on a side surface of the upper caliper body (512) or the lower caliper body (514) facing the yaw ring gear (322), the third sliding pad (416) being mounted on an upper surface of the lower caliper body (514) and facing a lower surface of the yaw ring gear (322).

8. Wind park according to claim 7, wherein the inner circumference of the yaw ring gear (322) is provided with teeth, the yaw drive unit (310) comprises a yaw motor (312) and a pinion (314) connected to the output shaft of the yaw motor (312), the pinion (314) being in mesh with the teeth, the yaw brake caliper (500) being located on the outer circumference side of the yaw ring gear (322).

9. Wind park according to claim 7, wherein the outer circumference of the yaw ring gear (322) is provided with teeth, the yaw drive unit (310) comprises a yaw motor (312) and a pinion (314) connected to the output shaft of the yaw motor (312), the pinion (314) being in mesh with the teeth, the yaw brake caliper (500) being located inside the yaw ring gear (322).

10. The wind generating set according to claim 7, wherein the yaw ring gear (322) is fixedly installed at the top end of the tower, a plurality of installation grooves (324) are uniformly arranged along the circumferential direction of the yaw ring gear (322) on the upper surface of the yaw ring gear (322), a plurality of the first sliding pads (412) are respectively installed in the plurality of installation grooves (324), the yaw driving unit (310) is installed on the connection base (212), and the yaw brake caliper (500) is fixedly connected to the lower surface of the connection base (212); or

The yaw gear ring (322) is fixedly installed on the lower surface of the connecting base (212), a plurality of installation grooves (324) are uniformly arranged on the lower surface of the yaw gear ring (322) along the circumferential direction of the yaw gear ring (322), a plurality of first sliding pads (412) are respectively installed in the plurality of installation grooves (324), and the yaw driving unit (310) and the yaw brake caliper (500) are fixedly connected to the tower (100).

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