CN111042987A

CN111042987A - Yaw system of wind generating set and replacing method of upper liner

Info

Publication number: CN111042987A
Application number: CN201911413767.6A
Authority: CN
Inventors: 刘瑞兵; 宗多; 时洪奎
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-21
Anticipated expiration: 2039-12-31
Also published as: CN111042987B

Abstract

The invention provides a yaw system of a wind generating set and a replacement method of an upper liner, wherein the yaw system comprises: the upper surface of the yaw gear ring supports a base of the engine room through an upper liner; the clamp is fixedly connected to the lower surface of the base, and the yaw gear ring is clamped between the base and the clamp; wherein, be equipped with the through-hole that runs through the base along thickness direction on the base, the through-hole makes the upper surface of driftage ring gear can expose in the space of the top of base, and the through-hole can hold jacking device's application of force component or bottom open-ended grease jar. The invention can install the force application component or the grease tank of the jacking device in the through hole, thereby providing a new replacing scheme and a new lubricating scheme of the upper liner, solving the problems of high replacing difficulty and high danger coefficient of the existing upper liner, and solving the problems of complex lubricating pipeline and oil circuit blockage of the existing upper liner.

Description

Yaw system of wind generating set and replacing method of upper liner

Technical Field

The invention relates to the technical field of wind power generation, in particular to a yawing system of a wind generating set and a replacing method of an upper liner.

Background

The yaw system, also called a wind alignment device, functions to align the wind direction quickly and smoothly when the direction of the wind speed vector changes, so as to obtain the maximum wind energy. The yaw system is positioned at the bottom of the nacelle and comprises a yaw gear ring, calipers, an upper pad, a lower pad, a yaw drive and the like. The upper liner often wears out too quickly when yawing into the wind and fails prematurely, thus requiring replacement of the upper liner. However, since the upper pad is pressed under the wind power generator having a weight of several tens or even hundreds of tons and is located at an altitude of several tens of meters, the replacement of the upper pad of the yawing system is difficult and involves a safety problem.

In addition, in order to prolong the service life of the upper liner, the upper liner is usually lubricated, and the existing lubricating method is generally provided with an oil way pipeline and a corresponding oil filling hole, so that the structure is complex, the cost is high, and the oil way blockage phenomenon is easy to occur.

Disclosure of Invention

One of the objectives of the present invention is to provide a yawing system for a wind turbine generator system, so as to provide a new replacement scheme for an upper liner.

Another object of the present invention is to provide a yawing system for a wind turbine generator set, so as to provide a new lubrication scheme for the upper liner.

The invention also aims to provide a method for replacing an upper liner of a yaw system of a wind generating set, so as to solve the problems of high replacing difficulty, high danger coefficient and high working strength of workers in the conventional upper liner.

According to an aspect of the present invention, there is provided a yawing system for a wind turbine generator set, the yawing system comprising: the yaw gear ring is fixedly connected to the tower barrel, and the upper surface of the yaw gear ring supports a base of the engine room through an upper liner; the clamp is fixedly connected to the lower surface of the base, and the yaw gear ring is clamped between the base and the clamp; the base is provided with a through hole penetrating through the base in the thickness direction, the upper surface of the yawing gear ring can be exposed to the space above the base through the through hole, and the through hole can accommodate a force application component of the jacking device or a grease tank with an opening at the bottom.

Optionally, when the yawing system works normally, the grease tank may be disposed in the through hole, and when the upper liner is replaced, the force application member of the jacking device may be accommodated in the through hole.

Alternatively, the jacking means may be a jack, for example a hydraulic jack, and the force applying member is a piston.

Optionally, the yaw system may further comprise a fixing device which limits upward displacement of the jacking device.

Optionally, the fixing device may include a fixing plate, and the fixing plate is connected to the base through a bolt connection pair and located above the base.

Alternatively, a side pad may be mounted to a side surface of the caliper, the caliper may be provided with a protrusion on which a lower pad may be mounted, the side pad being in contact with a side surface of the yaw ring gear, the lower pad being in contact with a lower surface of the yaw ring gear.

Optionally, a first threaded hole and an adjusting nut matched with the first threaded hole can be arranged in the protruding portion, and an assembly for mounting the lower gasket is arranged at the top of the adjusting nut.

Optionally, a second threaded hole and a screw matched with the second threaded hole can be arranged in the adjusting nut, and the top end of the screw is in contact with the lower surface of the component.

Optionally, the assembly may comprise: the lower part of the side surface of the positioning pin is provided with an annular step; the pressing plate is arranged on the top of the positioning pin, and the lower gasket is arranged on the pressing plate; and the elastic element is arranged on the annular step and is in contact with the lower surface of the pressure plate.

According to another aspect of the present invention, there is provided a method for replacing an upper pad of a yawing system of a wind turbine generator set, the method comprising the steps of:

(A) loosening the connection between the base of the cabin and the caliper;

(B) placing a force application component of the jacking device in the through hole, and arranging a fixing device for limiting the jacking device to move upwards;

(C) starting the jacking device to enable the force application component to apply acting force to the yaw gear ring (113), so that one side of the base is jacked up to a preset gap by using the reaction force of the force application component;

(D) the upper liner is replaced.

The embodiment of the invention provides a yawing system of a wind generating set, which is characterized in that a through hole is formed in a base of a nacelle, so that a force application component or a grease tank of a jacking device such as a jack can be arranged in the through hole.

When the application of force component that sets up jacking device in the through-hole, only need restrict the upwards displacement of jacking device can jack-up one side of the base in cabin, increase the base in cabin and the clearance between the ring gear of driftage, thereby be convenient for change the upper liner, need not to install the application of force object of jacking device in addition, show the potential safety hazard that reduces staff's intensity of labour and avoid the staff to exist because of the application of force object of installation jacking device, and simultaneously, the jacking device passes through fixing device and driftage ring gear realization is fixed, avoid causing the incident because of the jacking device skew in the course of the work.

In addition, when the replacing method of the upper liner of the yawing system of the wind generating set provided by the embodiment of the invention is applied, the cabin can be controlled to rotate around the yawing gear ring, the arrangement area of the upper liner is rotated to the position of a worker, and the worker can complete replacing work of all the upper liners at the fixed position by repeating the related steps without repeatedly ascending the height of the worker, so that the work intensity and the potential safety hazard of the worker are obviously reduced.

When the grease tank with the bottom opening is installed in the through hole, grease in the grease tank can fall onto the upper surface of the yaw gear ring through the opening under the action of self gravity, so that the lower surface of the upper liner is lubricated by the grease when the upper liner rotates along with the engine room, and the service life of the upper liner is greatly prolonged.

The lubricating scheme of the upper liner of the yaw system of the wind generating set provided by the embodiment of the invention has the advantages that the traditional oil way pipeline with a complex structure is abandoned, the oil way blockage phenomenon is avoided, and the cost is low.

Drawings

A full understanding of the present invention will be gained by those skilled in the art from the following detailed description of exemplary embodiments of the invention when considered in connection with the accompanying drawings, wherein:

FIG. 1 is a schematic view of a yaw system of a wind park according to an embodiment of the invention;

FIG. 2 is a schematic view of a jack arranged at a through hole of a yawing system of a wind generating set according to an embodiment of the invention;

fig. 3 is a schematic view of installing a grease tank in a through hole of a yaw system of a wind turbine generator system according to an embodiment of the present invention.

The reference numbers illustrate:

101: yaw driving; 102: a base; 1021: a through hole;

103: an upper liner; 104: a lower liner; 105: a caliper; 1051: a protrusion;

106: a side liner; 107: the bolt is connected to the pair; 108: an assembly; 1081: positioning pins;

1082: pressing a plate; 1083: an elastic element; 1084: an annular step; 109: adjusting the nut;

110: a screw; 111: the bolt is connected to the pair; 112: a flange; 113: a yaw gear ring;

114: a fixing plate; 115: the bolt is connected to the pair; 116: a jack; 1161: a piston;

117: a grease tank; 1171: grease; 118: a locknut.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout.

FIG. 1 is a schematic view of a yaw system of a wind park according to an embodiment of the invention. Fig. 2 is a schematic view of a jack arranged at a through hole of a yawing system of a wind generating set according to an embodiment of the invention. Fig. 3 is a schematic view of installing a grease tank in a through hole of a yaw system of a wind turbine generator system according to an embodiment of the present invention. An alternative embodiment of the yaw system and the upper pad replacement method of the wind turbine generator system according to the present invention will be described in detail with reference to fig. 1, 2 and 3.

According to an aspect of the present invention, there is provided a yaw system of a wind turbine generator system, including: a yaw ring gear 113 fixedly connected to the tower, wherein the upper surface of the yaw ring gear 113 supports the base 102 of the nacelle through an upper liner 103; a caliper 105 fixedly connected to a lower surface of the base 102, and the yaw ring gear 113 is sandwiched between the base 102 and the caliper 105; the base 102 is provided with a through hole 1021 penetrating through the base 102 in the thickness direction, the through hole 1021 enables the upper surface of the yaw gear ring 113 to be exposed to a space above the base 102, and the through hole 1021 can accommodate a force application member of the jacking device or the grease tank 117 with an opening at the bottom.

Specifically, the upper pad 103 may be mounted on the base 102, for example, a groove may be provided on the lower surface of the base 102, and the upper pad 103 may be adhered in the groove, or a spacer may be mounted in the groove, and the upper pad 103 may be uniformly adhered on the lower surface of the spacer. Note that the through hole 1021 should be offset from the upper pad 103 in the circumferential direction or the radial direction of the yaw ring 113 to ensure that the upper surface of the yaw ring 113 can be exposed to the cabin space above the base 102 through the through hole 1021.

As shown in fig. 2, the yawing system may further include a fixing device for limiting upward displacement of the jack (the jack is an example of the jacking device, but the jacking device referred to in the present invention is not limited to the jack). Specifically, the fixing device may include a fixing plate 114, and the fixing plate 114 is connected to the base 102 by a bolt connection pair 115 and is located above the base 102. Further, the fixing means is not limited to the plate-like form, and may be in a form other than the plate-like form, for example, a bar-like form, a block-like form, or the like.

Alternatively, a side pad 106 may be mounted to a side surface of the caliper 105, the caliper 105 may be provided with a protrusion 1051, a lower pad 104 may be mounted on the protrusion 1051, the side pad 106 may be in contact with a side surface of the yaw ring gear 113, and the lower pad 104 may be in contact with a lower surface of the yaw ring gear 113. Specifically, a first threaded hole and an adjusting nut 109 matched with the first threaded hole may be disposed in the protruding portion 1051, a lock nut 118 is disposed at the bottom of the adjusting nut 109, a second threaded hole and a screw 110 matched with the second threaded hole are disposed in the adjusting nut 109, an assembly 108 for mounting the lower gasket 104 is disposed at the top of the adjusting nut 109, and the assembly 108 may include: a positioning pin 1081, a top end of the screw 110 being in contact with a lower surface of the positioning pin 1081, a lower portion of a side surface of the positioning pin 1081 being provided with an annular step 1084; a press plate 1082 disposed on top of the locating pins 1081, the lower gasket 104 being mounted on the press plate 1082; and an elastic member 1083 provided on the annular step 1084 and contacting a lower surface of the pressing plate 1082. The elastic member 1083 may be a disc spring or a washer having an elastic force, but is not limited thereto. The elastic force of the elastic element 1083 is preset by rotating the adjusting nut 109, and then the lower gasket 104 is tightly attached to the lower surface of the yaw gear ring 113 through locking of the screw 110.

Further, an upper portion of the inside of the yaw ring gear 113 may be provided with an annular protrusion, which is located on the protruding portion 1051, by which the yaw ring gear 113 is sandwiched between the base 102 and the caliper 105, the lower pad 104 is in contact with the lower surface of the annular protrusion, and the side pad 106 is in contact with the side surface of the annular protrusion.

In addition, the yaw system of the wind turbine generator set according to the embodiment of the present invention may further include: and a yaw drive 101 for driving the nacelle to yaw around the tower. The yaw drive 101 is integrated with a yaw motor, a yaw gearbox (for changing speed and increasing torque), a yaw gear, etc., and is connected to the base 102 of the nacelle. The yaw motor drives the yaw gear to rotate through the yaw gearbox, the yaw gear is meshed with the yaw gear ring 113, the bottom of the yaw gear ring 113 is fixedly connected with the flange 112 at the top of the tower barrel through the bolt connecting pair 111, and therefore the yaw gear ring 113 cannot rotate, but the yaw gear rotates around the yaw gear ring 113, and therefore the engine room is driven to rotate. The caliper 105 is fixedly connected to the base 102 by means of a bolt connection pair 107, so that the caliper 105 follows the nacelle in a synchronous rotation.

When replacing the upper pad 103, as shown in fig. 2, the through hole 1021 can accommodate the force applying member of the jacking device, and the following description will be given by taking the situation where the jacking device is the jack 116 and the force applying member is the piston 1161 as an example, but the jacking device according to the embodiment of the present invention is not limited to the jack.

The replacement method of the upper liner of the yaw system of the wind generating set comprises the following steps:

(A) loosening the connection between the base 102 of the nacelle and the caliper 105;

(B) placing the piston 1161 of the jack 116 in the through hole 1021, and setting a fixing device for limiting the jack 116 to move upwards;

(C) starting jack 116 to make piston 1161 apply a force to yaw ring gear 113 so as to jack up one side of base 102 by a predetermined gap using its reaction force;

(D) the upper liner 103 is replaced.

In the step (B), the fixing device may include a fixing plate 114, and the fixing plate 114 is connected to the base 102 by a bolt connection pair 115 and is located above the base 102. The jack 116 is disposed upside down, the piston 1161 is disposed in the through hole 1021, and the bottom of the jack 116 contacts the fixing plate 114 to restrict upward movement thereof. In step (C), the predetermined gap may be 0 to 1mm, the thickness of the upper pad 103 used in the present invention is about 20mm, and after the nacelle side is jacked up by the predetermined gap of 0 to 1mm, the gap between the base 102 and the yaw ring gear 113 can allow a worker to insert a tool, which may be a stripper bar, into the gap and remove the upper pad, and the end of the stripper bar is used to apply force to the side of the upper pad 103. Further, a larger predetermined gap may also be provided as needed. In addition, if the upper gasket 103 has a large adhesive force with the groove or the pad, it is not easy to remove the upper gasket 103, so the side surface of the upper gasket used in the present invention may be provided with a removal hole which is engaged with a removal rod, such that the removal rod extends into the removal hole, which facilitates applying a downward force to one side of the upper gasket 103, thereby easily removing the upper gasket 103, wherein the removal hole may be a threaded hole, and the removal rod may be a screw which is engaged with the threaded hole.

In addition, since there are usually a plurality of areas of the upper pad 103 disposed on the base 102, after the worker replaces the upper pad 103 in one of the areas, the worker can control the piston 1161 of the jack 116 to retract into the through hole 1021, so as to reposition the jacked side of the nacelle and control the nacelle to rotate around the yaw ring 113, and then repeat the above steps (C) and (D), so as to replace the upper pad 103 in another area, and repeat the above steps until all the upper pads 103 are replaced, and finally, the caliper 105 is fixedly connected to the base 102 again.

In addition, a plurality of corresponding through holes 1021 can be arranged on the base 102 according to the arrangement area of the upper pad 103, after a worker replaces the upper pad 103 in one arrangement area, the piston 1161 of the jack 116 can be controlled to retract into the through hole 1021 in the arrangement area, the jacked side of the nacelle is reset, the jack 116 is taken out, the nacelle is controlled to rotate around the yaw gear ring 113, then the steps (B) to (D) are repeated, at the moment, in the step (B), the piston 1161 of the jack 116 is placed in the through hole 1021 in the other arrangement area, the upper pad 103 in the other arrangement area can be replaced, and the steps are repeated until all the upper pads 103 are replaced, and finally, the caliper 105 is fixedly connected with the base 102 again.

In addition, the lower pad 104 and the side pads 106 are used to ensure that the caliper 105 has a certain friction torque to improve the stability of the wind turbine during operation, and the caliper does not wear too fast and generally does not need to be replaced frequently. When the lower gasket 104 needs to be replaced, the adjustment nut 109 is loosened and then replaced. When the side pads 106 need to be replaced, the connection between the base 102 and the caliper 105 is simply released and the caliper 105 is moved downward for replacement. The side pad 106 may be fixed to the caliper 105 by screws (not shown).

When the yaw system normally works, as shown in fig. 3, a grease tank 117 may be disposed in the through hole 1021, and grease 1171 in the grease tank 117 may fall onto the upper surface of the yaw ring gear 113 through the opening under the action of its own gravity, so that when the upper liner 103 rotates along with the nacelle, the lower surface of the upper liner is lubricated by the grease 1171, thereby greatly prolonging the service life of the upper liner 103.

Further, although the lower pad 104 and the side pad 106 may be made of a self-lubricating material without being greased, grease on the upper surface of the yaw ring gear 113 flows to the gap between the caliper 105 and the yaw ring gear 113 while the grease 1171 lubricates the upper pad 103, thereby lubricating the side pad 106, and then may also flow to the protruding portion 1051, thereby lubricating the lower pad 104. In addition, the lower surface of the upper pad 103 and the surface of the side pad 106 contacting the yaw ring gear 113 may be provided with a guide groove to facilitate the flow of grease.

Alternatively, the grease tank 117 may be fixed by the fixing means, and the upward movement of the grease tank 117 may be restricted by contacting the top of the grease tank 117 with the fixing plate 114 (not shown in fig. 3).

The embodiment of the invention provides a yawing system of a wind generating set, which is characterized in that a through hole is formed in a base of a nacelle, so that a force application component or a grease tank of a jacking device such as a jack can be arranged in the through hole. When the application of force component that sets up jacking device in the through-hole, only need restrict the upwards displacement of jacking device can jack-up one side of the base in cabin, increase the base in cabin and the clearance between the ring gear of driftage, thereby be convenient for change the upper liner, need not to install the application of force object of jacking device in addition, show the potential safety hazard that reduces staff's intensity of labour and avoid the staff to exist because of the application of force object of installation jacking device, and simultaneously, the jacking device passes through fixing device and driftage ring gear realization is fixed, avoid causing the incident because of the jacking device skew in the course of the work. In addition, when the replacing method of the upper liner of the yawing system of the wind generating set provided by the embodiment of the invention is applied, the cabin can be controlled to rotate around the yawing gear ring, the arrangement area of the upper liner is rotated to the position of a worker, and the worker can complete replacing work of all the upper liners at the fixed position by repeating the related steps without repeatedly ascending the height of the worker, so that the work intensity and the potential safety hazard of the worker are obviously reduced. When the grease tank with the bottom opening is installed in the through hole, grease in the grease tank can fall onto the upper surface of the yaw gear ring through the opening under the action of self gravity, so that the lower surface of the upper liner is lubricated by the grease when the upper liner rotates along with the engine room, and the service life of the upper liner is greatly prolonged. The lubricating scheme of the upper liner of the yaw system of the wind generating set provided by the invention abandons the traditional oil way pipeline with a complex structure, avoids the oil way blockage phenomenon and has low cost.

Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A yaw system of a wind turbine generator set, the yaw system comprising: the yaw gear ring (113) is fixedly connected to a tower, and the upper surface of the yaw gear ring (113) supports a base (102) of a machine cabin through an upper liner (103);

a caliper (105), wherein the caliper (105) is fixedly connected to the lower surface of the base (102), and the yaw gear ring (113) is clamped between the base (102) and the caliper (105);

the yawing structure comprises a base (102), wherein a through hole (1021) penetrating through the base (102) in the thickness direction is formed in the base (102), the upper surface of a yawing gear ring (113) can be exposed to a space above the base (102) through the through hole (1021), and a force application component of a jacking device or a grease tank (117) with an opening at the bottom can be accommodated in the through hole (1021).

2. The yawing system of a wind generating set according to claim 1, wherein the grease tank (117) is provided in the through hole (1021) during normal operation of the yawing system, and the force applying member of the jacking device is accommodated in the through hole (1021) during replacement of the upper pad (103).

3. The yawing system of a wind generating set according to claim 1 or 2, wherein the jacking device is a jack (116) and the force applying member is a piston (1161).

4. The yawing system of claim 1, further comprising a fixing device that limits upward displacement of the jacking device.

5. The yawing system of a wind generating set according to claim 4, wherein the fixing means comprises a fixing plate (114), and the fixing plate (114) is connected to the base (102) by a bolt connection pair (115) and is located above the base (102).

6. The yawing system of a wind generating set according to claim 1, wherein a side pad (106) is mounted on a side surface of the caliper (105), the caliper (105) is provided with a protrusion (1051), a lower pad (104) is mounted on the protrusion (1051), the side pad (106) is in contact with a side surface of the yawing ring gear (113), and the lower pad (104) is in contact with a lower surface of the yawing ring gear (113).

7. The yawing system of a wind generating set according to claim 6, wherein a first threaded hole and an adjusting nut (109) matched with the first threaded hole are arranged in the protrusion (1051), and the top of the adjusting nut (109) is provided with a component (108) for mounting the lower pad (104).

8. The yawing system of a wind generating set according to claim 7, wherein a second threaded hole and a screw (110) matched with the second threaded hole are arranged in the adjusting nut (109), and the top end of the screw (110) is in contact with the lower surface of the component (108).

9. The yawing system of a wind generating set according to claim 7, wherein the assembly (108) comprises:

a positioning pin (1081), a lower portion of a side surface of the positioning pin (1081) being provided with an annular step (1084);

a platen (1082), the platen (1082) disposed on top of the dowel pin (1081), the lower gasket (104) mounted on the platen (1082);

an elastic member (1083), the elastic member (1083) being disposed on the annular step (1084) and being in contact with a lower surface of the pressing plate (1082).

10. A method for replacing an upper liner of a yawing system of a wind turbine generator set, wherein the method for replacing the upper liner of the yawing system comprises the following steps:

(A) loosening the connection between the base (102) and the caliper (105) of the nacelle;

(B) placing a force application member of a jacking device in a through hole (1021) of any one of claims 1-9, and providing a fixing device for limiting upward movement of the jacking device;

(C) starting the jacking device to enable the force application component to apply acting force to the yaw gear ring (113), so that one side of the base (102) is jacked up by a preset gap through the reaction force of the force application component;

(D) the upper liner (103) is replaced.