Alternating-current variable-pitch system of wind turbine generator

Abstract

The invention relates to the technical field of fan variable pitch, in particular to a wind turbine generator alternating current variable pitch system which comprises a variable pitch bearing, a collecting assembly is fixedly connected to the interior of the variable pitch bearing, evenly-distributed fixing plates are fixedly connected to the outer side of the collecting assembly, and collecting frames are fixedly connected to the two sides of the bottom of the collecting assembly. The bottom of the collecting frame is communicated with a connecting plate, the bottom of the connecting plate is communicated with a collecting pipe, the bottom of the collecting pipe is connected with a hose, the other end of the hose is communicated with a collecting hopper, and the top of the collecting hopper is communicated with a second guide plate. When the variable-pitch bearing oil seal is used, the guide grooves are formed in the inner side of the first guide plate arranged in the variable-pitch bearing, the second guide plate is arranged below the variable-pitch bearing, during oil injection, waste oil overflows through the oil seal, and the overflowed waste oil can be collected and treated in a centralized mode through the first guide plate and the second guide plate; and the potential safety hazard to the unit caused by random dripping of the water is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine pitch control, and in particular to an AC pitch control system for a wind turbine set. Background Art

[0002] The hydraulic variable pitch system uses an electric hydraulic pump as the working power, hydraulic oil as the transmission medium, and a solenoid valve as the control unit. The pitch of the blades is changed by converting the radial motion of the cylinder piston rod into the circular motion of the blades. Compared with the electric variable pitch system, the hydraulic transmission has a small unit volume, light weight, good dynamic response, large torque, and no need for a speed change mechanism. Since the blades are constantly rotating, the hydraulic oil pipeline of the hydraulic station in the cabin must be introduced into the rotating hub through a rotating joint. The pressure of the hydraulic oil is about 20MPa, so the manufacturing process has high requirements and is difficult. The pipeline is also prone to leakage. The hydraulic system has high requirements for ambient temperature due to the influence of the viscosity-temperature characteristics of the hydraulic oil. For fans used at different latitudes, the hydraulic oil needs to be heated or cooled.

[0003] During the long-term use of the existing wind turbine pitch system, it is necessary to add lubricating oil to the pitch bearing for lubrication. The oil is transported to the oil distributor through the lubrication pump station, and the pitch bearing is distributedly greased through the distributor. The sealing ring of the pitch bearing is generally resistant to a pressure of 0.15-0.3Mpa. Due to the large oil discharge resistance, it is generally difficult for the oil collection bottle to fully collect the waste grease, and the waste oil will overflow from the oil seal, which poses a huge safety hazard to the operation of the unit. Therefore, an AC pitch system for a wind turbine is proposed to address the above problems. Summary of the invention

[0004] The object of the present invention is to provide an AC pitch control system for a wind turbine generator set to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] As an optional solution of the AC variable pitch system of a wind turbine generator set described in the present invention, wherein: an AC variable pitch system of a wind turbine generator set comprises a variable pitch bearing,

[0007] The interior of the variable pitch bearing is fixedly connected with a collecting assembly, the outer side of the collecting assembly is fixedly connected with evenly distributed fixing plates, and the other end of the fixing plate is fixedly connected with the variable pitch bearing;

[0008] The two sides of the bottom of the collecting component are fixedly connected with a collecting frame, the bottom of the collecting frame is connected with a connecting plate, the bottom of the connecting plate is connected with a collecting pipe, the bottom of the collecting pipe is connected with a hose, the other end of the hose is connected with a collecting bucket, the top of the collecting bucket is connected with a second guide plate, the upper part of the second guide plate is fixedly connected to the pitch bearing through a fixing plate, and the two sides of the second guide plate are fixedly connected with vibration components.

[0009] During the long-term use of the existing variable pitch system of the wind turbine, it is necessary to add lubricating oil to the variable pitch bearing for lubrication. The oil is transported to the oil distributor through the lubrication pump station, and the variable pitch bearing is distributedly greased through the distributor. The sealing ring of the variable pitch bearing is generally resistant to pressure of 0.15-0.3Mpa. Due to the large oil discharge resistance, it is generally difficult for the oil collection bottle to fully collect the waste grease. The waste oil will overflow from the oil seal, which will bring huge safety hazards to the operation of the unit. When the present invention is used, one side of the variable pitch bearing is located vertically. In the ground state, the collecting bottle is placed under the collecting pipe, a first guide plate with a semicircular arrangement is arranged on the inner side of the variable pitch bearing, and a guide groove is arranged on the inner side of the first guide plate, and a second guide plate is arranged under the variable pitch bearing. At this time, when oil is filled, the waste oil overflows through the oil seal. At this time, the overflowed waste oil can be centrally collected and processed by the first guide plate and the second guide plate to avoid its random dripping and the safety hazard to the unit. At the same time, the waste oil can be centrally collected for subsequent use to avoid waste of resources.

[0010] As an optional solution of an AC pitch system for a wind turbine described in the present invention, the collecting component includes a first guide plate and a guide groove, the outer side of the first guide plate is fixedly connected to the pitch bearing through a fixed plate, the outer side of the first guide plate is provided with an arc-shaped guide groove, the interior of the first guide plate is provided with a movable frame, the rear side of the movable frame is horizontally slidably connected to the first guide plate, the central part of the movable frame is slidably connected to a movable plate, the rear side of the movable plate is fixedly connected to a movable component, and the rear side of the movable component is fixedly connected to the first guide plate.

[0011] As an optional solution of the AC variable pitch system of a wind turbine described in the present invention, the upper and lower sides of the movable frame are fixedly connected to a fixed platform, the outer side of the fixed platform is fixedly connected to a knocking plate, the other end of the knocking plate is fixedly connected to a buffer pad, and the other side of the buffer pad is provided with a knocking block fixedly connected to the first guide plate.

[0012] As an optional solution of the AC variable pitch system of a wind turbine set described in the present invention, wherein: sliding rods are slidably connected to the inner sides of the movable frame, one end of the sliding rod is fixedly connected to a sliding plate, the other end of the sliding rod is slidably connected to the movable frame, the outer side of the sliding plate is slidably connected to the movable frame, and a spring is provided on the outer side of the sliding rod, one end of the spring is fixedly connected to the movable frame, and the other end of the spring is fixedly connected to the sliding plate.

[0013] When collecting waste oil, the moving plate can be driven to move by starting the moving assembly, and the moving plate squeezes the sliding plate on one side. At this time, the sliding plate squeezes the sliding rod and the spring to move. When the moving plate moves to one side, the moving frame can be moved to one side under the action of the spring. At this time, the moving frame can drive the knocking plate and the buffer pad to move and knock the knocking block. At this time, the inside of the first guide plate can be vibrated, which helps the waste oil to fall and realize the collection of the waste oil.

[0014] As an optional solution of the AC pitch control system for a wind turbine set described in the present invention, a heating pipe is fixedly connected to the interior of the first guide plate.

[0015] When the waste oil drips into the guide groove provided on the outside of the first guide plate, the heating pipe is activated for heating to ensure the fluidity of the lubricating oil, so that it can easily flow into the collection frame, enter the collection pipe through the connecting pipe, and then drip into the collection bottle.

[0016] As an optional solution of the AC variable pitch system of a wind turbine set described in the present invention, the moving component includes a fixed frame, a first motor and a threaded rod, the rear side of the fixed frame is fixedly connected to the first guide plate, the interior of the fixed frame is fixedly connected to the first motor, the end of the main shaft of the first motor is fixedly connected to the threaded rod, the outer side of the threaded rod is spirally connected to a moving sleeve, and the other end of the moving sleeve is fixedly connected to the moving plate.

[0017] When the moving component is in use, the first motor is started to drive the threaded rod to move, and the threaded rod drives the moving sleeve to move. At this time, the moving frame can slide horizontally under the action of the moving plate to knock the knocking plates on both sides, and the forward and reverse rotation of the first motor can achieve the purpose of back and forth vibration.

[0018] As an optional solution of an AC pitch system for a wind turbine set described in the present invention, the vibration component includes a mounting frame, a second motor and a rotating shaft, the outer side of the mounting frame is fixedly connected to the second guide plate, the inside of the mounting frame is fixedly connected to the second motor, the end of the main shaft of the second motor is fixedly connected to the rotating shaft, the outer side of the rotating shaft is fixedly connected to a rotating disk, the inside of the rotating disk is rotatably connected to a rotating plate, and a vibration plate is provided on one side of the rotating plate, and the outer side of the vibration plate is fixedly connected to the second guide plate.

[0019] When waste oil is collected inside the second guide plate, the second motor drives the rotating shaft to rotate, the rotating shaft drives the rotating disk to rotate, and the rotating disk drives the rotating plate to rotate and the rotating plate strikes the vibration plate. At this time, the vibration plate can drive the second guide plate to vibrate, so as to ensure that the waste oil inside the second guide plate is discharged smoothly and quickly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] When the present invention is in use, one side of the variable pitch bearing is located in a state perpendicular to the ground, a collection bottle is placed under the collecting pipe, a first guide plate arranged in a semicircular shape is arranged on the inner side of the variable pitch bearing, and a guide groove is arranged on the inner side of the first guide plate, and a second guide plate is arranged under the variable pitch bearing. At this time, when oil is injected, the waste oil overflows through the oil seal. At this time, the overflowed waste oil can be centrally collected and processed by the first guide plate and the second guide plate, so as to avoid the safety hazard caused by random dripping to the unit. At the same time, the waste oil can be centrally collected for subsequent use, so as to avoid waste of resources.

[0022] When the waste oil drips into the guide groove provided on the outer side of the first guide plate, the heating pipe is activated to heat the waste oil, thereby ensuring the fluidity of the waste oil, so that the waste oil can flow into the collecting frame conveniently, and enter the collecting pipe through the connecting pipe, and then drip into the collecting bottle.

[0023] When collecting waste oil, the moving plate can be driven to move by starting the moving assembly, and the moving plate squeezes the sliding plate on one side. At this time, the sliding plate squeezes the sliding rod and the spring to move. When the moving plate moves to one side, the moving frame can be moved to one side under the action of the spring. At this time, the moving frame can drive the knocking plate and the buffer pad to move and knock the knocking block. At this time, the inside of the first guide plate can be vibrated, which helps the waste oil to fall and realize the collection of the waste oil.

[0024] When the moving assembly is in use, the first motor is started to drive the threaded rod to move, and the threaded rod drives the moving sleeve to move. At this time, the moving frame can slide horizontally under the action of the moving plate to knock the knocking plates on both sides, and the forward and reverse rotation of the first motor can achieve the purpose of back and forth vibration;

[0025] When the second guide plate collects waste oil, the second motor drives the rotating shaft to rotate, the rotating shaft drives the rotating disk to rotate, and the rotating disk drives the rotating plate to rotate and the rotating plate strikes the vibration plate. At this time, the vibration plate can drive the second guide plate to vibrate, so as to ensure that the waste oil inside the second guide plate is discharged smoothly and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an AC pitch control system for a wind turbine;

[0027] Figure 2 It is a structural schematic diagram of a collection component of an AC pitch control system for a wind turbine;

[0028] Figure 3 It is a structural schematic diagram of a mobile frame of an AC pitch control system of a wind turbine;

[0029] Figure 4 It is a structural schematic diagram of a mobile component of an AC pitch control system of a wind turbine;

[0030] Figure 5 It is a structural schematic diagram of a second guide plate of an AC pitch control system of a wind turbine;

[0031] Figure 6 The figure is a schematic diagram of the structure of a vibration component of an AC pitch control system of a wind turbine.

[0032] In the figure: 1. pitch bearing; 2. collecting assembly; 201. first guide plate; 202. heating tube; 203. guide groove; 204. knocking block; 205. moving frame; 206. fixed table; 207. knocking plate; 208. buffer pad; 209. moving plate; 210. sliding plate; 211. sliding rod; 212. spring; 213. fixed frame; 214. first motor; 215. threaded rod; 216. moving sleeve; 3. collecting frame; 4. connecting pipe; 5. collecting pipe; 6. second guide plate; 7. vibration assembly; 701. mounting frame; 702. second motor; 703. rotating shaft; 704. rotating disk; 705. rotating plate; 706. vibration plate; 8. collecting bucket; 9. hose; 10. fixed plate. DETAILED DESCRIPTION

[0033] Embodiment 1:

[0034] See also Figure 1 and Figure 5 , the present invention provides a technical solution:

[0035] An AC variable pitch system for a wind turbine generator system includes a variable pitch bearing 1,

[0036] The inside of the pitch bearing 1 is fixedly connected with a collecting assembly 2, the outside of the collecting assembly 2 is fixedly connected with evenly distributed fixing plates 10, and the other end of the fixing plate 10 is fixedly connected to the pitch bearing 1;

[0037] The two sides of the bottom of the collecting assembly 2 are fixedly connected with a collecting frame 3, the bottom of the collecting frame 3 is connected with a connecting plate 4, the bottom of the connecting plate 4 is connected with a collecting pipe 5, the bottom of the collecting pipe 5 is connected with a hose 9, the other end of the hose 9 is connected with a collecting bucket 8, the top of the collecting bucket 8 is connected with a second guide plate 6, the top of the second guide plate 6 is fixedly connected to the pitch bearing 1 through a fixing plate 10, and the two sides of the second guide plate 6 are fixedly connected with vibration assemblies 7.

[0038] During the long-term use of the existing variable pitch system of the wind turbine, it is necessary to add lubricating oil to the variable pitch bearing for lubrication. The oil is transported to the oil distributor through the lubrication pump station, and the variable pitch bearing is distributedly greased through the distributor. The sealing ring of the variable pitch bearing is generally resistant to pressure of 0.15-0.3Mpa. Due to the large oil discharge resistance, it is generally difficult for the oil collection bottle to fully collect the waste grease. The waste oil will overflow from the oil seal, which will bring huge safety hazards to the operation of the unit. When the present invention is in use, one side of the variable pitch bearing 1 is located in a state perpendicular to the ground, and the collected The bottle is placed under the collecting pipe 5, a first guide plate 201 with a semicircular arrangement is arranged on the inner side of the variable pitch bearing 1, and a guide groove 203 is arranged on the inner side of the first guide plate 201, and a second guide plate 6 is arranged under the variable pitch bearing 201. At this time, when oil is injected, the waste oil overflows through the oil seal. At this time, the overflowed waste oil can be centrally collected and processed by the first guide plate 201 and the second guide plate 6 to avoid the safety hazard caused by its random dripping to the unit. At the same time, the waste oil can be centrally collected for subsequent use to avoid waste of resources.

[0039] Example 2

[0040] This embodiment is an improvement made to the first embodiment. Figure 2 and Figure 3 Specifically, the collecting assembly 2 comprises a first guide plate 201 and a guide groove 203. The outer side of the first guide plate 201 is fixedly connected to the pitch bearing 1 through a fixed plate 10. An arc-shaped guide groove 203 is provided on the outer side of the first guide plate 201. A moving frame 205 is provided inside the first guide plate 201. The rear side of the moving frame 205 is horizontally slidably connected to the first guide plate 201. A moving plate 209 is slidably connected to the center of the moving frame 205. A moving assembly is fixedly connected to the rear side of the moving plate 209. The rear side of the moving assembly is fixedly connected to the first guide plate 201.

[0041] The upper and lower sides of the movable frame 205 are fixedly connected with a fixed platform 206, the outer side of the fixed platform 206 is fixedly connected with a knocking plate 207, the other end of the knocking plate 207 is fixedly connected with a buffer pad 208, and the other side of the buffer pad 208 is provided with a knocking block 204 fixedly connected to the first guide plate 201.

[0042] The inner sides of the movable frame 205 are slidably connected with sliding rods 211, one end of the sliding rods 211 is fixedly connected with a sliding plate 210, the other end of the sliding rods 211 is slidably connected with the movable frame 205, the outer side of the sliding plate 210 is slidably connected with the movable frame 205, and the outer side of the sliding rods 211 is provided with springs 212, one end of the springs 212 is fixedly connected with the movable frame 205, and the other end of the springs 212 is fixedly connected with the sliding plate 210.

[0043] When collecting waste oil, the moving plate 209 can be driven to move by starting the moving component, and the moving plate 209 squeezes the sliding plate 210 on one side. At this time, the sliding plate 210 squeezes the sliding rod 211 and the spring 212 to move. When the moving plate 209 moves to one side, the moving frame 205 can be moved to one side under the action of the spring 212. At this time, the moving frame 205 can drive the knocking plate 207 and the buffer pad 208 to move, and knock the knocking block 204. At this time, the inside of the first guide plate 201 can be vibrated, which helps the waste oil to fall and realize the collection of the waste oil.

[0044] Example 3

[0045] This embodiment is an improvement made to Example 2. Figure 2 Specifically, a heating tube 202 is fixedly connected inside the first guide plate 201 .

[0046] When the waste oil drips into the guide groove 203 provided on the outer side of the first guide plate 201, the heating tube 202 is activated for heating to ensure the fluidity of the lubricating oil, so that it can easily flow into the collecting frame 3, and enter the collecting pipe 5 through the connecting pipe 4, and then drip into the collecting bottle.

[0047] Example 4

[0048] This embodiment is an improvement made to the implementation example 3, please refer to Figure 4Specifically, the moving assembly includes a fixed frame 213, a first motor 214 and a threaded rod 215. The rear side of the fixed frame 213 is fixedly connected to the first guide plate 201. The interior of the fixed frame 213 is fixedly connected to the first motor 214. The end of the main shaft of the first motor 214 is fixedly connected to the threaded rod 215. The outer side of the threaded rod 215 is spirally connected to a moving sleeve 216. The other end of the moving sleeve 216 is fixedly connected to the moving plate 209.

[0049] When the moving component is in use, the first motor 214 is started to drive the threaded rod 215 to move, and the threaded rod 215 drives the moving sleeve 216 to move. At this time, under the action of the moving plate 209, the moving frame 205 can slide horizontally to knock the knocking plates 204 on both sides, and the forward and reverse rotation of the first motor 214 can achieve the purpose of back and forth vibration.

[0050] Example 5

[0051] This embodiment is an improvement made to the implementation example 4, please refer to Figure 6 Specifically, the vibration assembly 7 includes a mounting frame 701, a second motor 702 and a rotating shaft 703. The outer side of the mounting frame 701 is fixedly connected to the second guide plate 6. The interior of the mounting frame 701 is fixedly connected to the second motor 702. The end of the main shaft of the second motor 702 is fixedly connected to the rotating shaft 703. The outer side of the rotating shaft 703 is fixedly connected to a rotating disk 704. The interior of the rotating disk 704 is rotatably connected to a rotating plate 705. A vibration plate 706 is provided on one side of the rotating plate 705. The outer side of the vibration plate 706 is fixedly connected to the second guide plate 6.

[0052] When waste oil is collected inside the second guide plate 6, the second motor 702 drives the rotating shaft 703 to rotate, the rotating shaft 703 drives the rotating disk 704 to rotate, and the rotating disk 704 drives the rotating plate 705 to rotate, and the rotating plate 705 strikes the vibration plate 706. At this time, the vibration plate 706 can drive the second guide plate 6 to vibrate, so as to ensure that the waste oil inside the second guide plate 706 is discharged smoothly and quickly.

[0053] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. An AC pitch control system for a wind turbine, characterized in that: comprising a pitch bearing (1), The interior of the variable pitch bearing (1) is fixedly connected with a collecting assembly (2), the outer side of the collecting assembly (2) is fixedly connected with evenly distributed fixing plates (10), and the other end of the fixing plate (10) is fixedly connected to the variable pitch bearing (1); The two sides of the bottom of the collecting component (2) are fixedly connected to a collecting frame (3), the bottom of the collecting frame (3) is connected to a connecting pipe (4), the bottom of the connecting pipe (4) is connected to a collecting pipe (5), the bottom of the collecting pipe (5) is connected to a hose (9), the other end of the hose (9) is connected to a collecting bucket (8), the top of the collecting bucket (8) is connected to a second guide plate (6), the top of the second guide plate (6) is fixedly connected to the pitch bearing (1) through a fixing plate (10), and the two sides of the second guide plate (6) are fixedly connected to vibration components (7).

2. The AC pitch control system of a wind turbine according to claim 1, characterized in that: The collecting assembly (2) comprises a first guide plate (201) and a guide groove (203); the outer side of the first guide plate (201) is fixedly connected to the pitch bearing (1) through a fixed plate (10); the outer side of the first guide plate (201) is provided with an arc-shaped guide groove (203); a moving frame (205) is arranged inside the first guide plate (201); the rear side of the moving frame (205) is horizontally slidably connected to the first guide plate (201); a moving plate (209) is slidably connected to the center of the moving frame (205); the rear side of the moving plate (209) is fixedly connected to a moving assembly; and the rear side of the moving assembly is fixedly connected to the first guide plate (201).

3. The AC pitch control system of a wind turbine according to claim 2, characterized in that: The upper and lower sides of the movable frame (205) are fixedly connected to a fixed platform (206), the outer side of the fixed platform (206) is fixedly connected to a knocking plate (207), the other end of the knocking plate (207) is fixedly connected to a buffer pad (208), and the other side of the buffer pad (208) is provided with a knocking block (204) fixedly connected to the first guide plate (201).

4. The AC pitch control system of a wind turbine according to claim 2, characterized in that: A heating tube (202) is fixedly connected inside the first guide plate (201).

5. The AC pitch control system of a wind turbine according to claim 2, characterized in that: The moving assembly comprises a fixed frame (213), a first motor (214) and a threaded rod (215); the rear side of the fixed frame (213) is fixedly connected to the first guide plate (201); the interior of the fixed frame (213) is fixedly connected to the first motor (214); the end of the main shaft of the first motor (214) is fixedly connected to the threaded rod (215); the outer side of the threaded rod (215) is spirally connected to a moving sleeve (216); the other end of the moving sleeve (216) is fixedly connected to the moving plate (209).

6. The AC pitch control system of a wind turbine according to claim 2, characterized in that: Sliding rods (211) are slidably connected to both sides of the interior of the moving frame (205); one end of the sliding rod (211) is fixedly connected to a sliding plate (210); the other end of the sliding rod (211) is slidably connected to the moving frame (205); the outer side of the sliding plate (210) is slidably connected to the moving frame (205); a spring (212) is provided on the outer side of the sliding rod (211); one end of the spring (212) is fixedly connected to the moving frame (205); and the other end of the spring (212) is fixedly connected to the sliding plate (210).

7. The AC pitch control system for a wind turbine according to claim 1, characterized in that: The vibration component (7) comprises a mounting frame (701), a second motor (702) and a rotating shaft (703); the outer side of the mounting frame (701) is fixedly connected to the second guide plate (6); the interior of the mounting frame (701) is fixedly connected to the second motor (702); the end of the main shaft of the second motor (702) is fixedly connected to the rotating shaft (703); the outer side of the rotating shaft (703) is fixedly connected to a rotating disk (704); the interior of the rotating disk (704) is rotatably connected to a rotating plate (705); a vibration plate (706) is provided on one side of the rotating plate (705); the outer side of the vibration plate (706) is fixedly connected to the second guide plate (6).

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