CN210087544U - Wind turbine generator system overspeed control device - Google Patents
Wind turbine generator system overspeed control device Download PDFInfo
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- CN210087544U CN210087544U CN201920328844.7U CN201920328844U CN210087544U CN 210087544 U CN210087544 U CN 210087544U CN 201920328844 U CN201920328844 U CN 201920328844U CN 210087544 U CN210087544 U CN 210087544U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model relates to a mechanical equipment and safety control technical field, concretely relates to wind turbine generator system overspeed control device, including three overspeed control subsystems of group, every group all includes the pneumatic means that the meshing transmission is connected and becomes oar drive transmission, becomes oar drive transmission and ring gear meshing drive paddle and becomes oar, overspeed detection device real-time supervision wheel hub's rotational speed. The existing pitch control system realizes the change of the pitch angle through the control of a main power supply or a standby power supply, and once the main power supply or the standby power supply fails, the pitch control system cannot complete pitch control, so that a wind turbine generator generates runaway and tower collapse, and therefore, a set of overspeed protection device is very necessary to be added to add a protection barrier for the existing pitch control system. When the hub is detected to be overspeed, an overspeed signal is sent to the controller, and the controller controls the pneumatic device to start and drive the pitch-variable driving transmission device to rotate so as to drive the gear ring to rotate, so that the pitch angle is adjusted, and the pitch-variable action is completed.
Description
Technical Field
The utility model relates to a mechanical equipment and safety control technical field, concretely relates to wind turbine generator system overspeed control device.
Background
Overspeed protection is an important ring in a safety chain of a wind turbine generator, and aims to prevent serious safety problems such as blade breakage, fan toppling and the like caused by runaway of a fan. During the normal operation of the wind turbine generator, when the wind speed exceeds the rated wind speed of the generator, the variable pitch system can automatically adjust the blade angle of the wind turbine generator according to the change of the wind speed under the power supply action of the main power supply, so that the rotating speed of the wind wheel is kept constant, and the stability of the generating power of the generator set is ensured. The wind turbine generator generally comprises a main shaft, a hub, blades and a variable pitch system, wherein the variable pitch system is controlled by a variable pitch central controller to drive the blades to rotate under the condition of power supply of a main power supply to complete variable pitch action; when the wind turbine generator normally operates, the blades are positioned at acting positions forming a certain included angle with the wind direction; when the generator set is shut down due to any emergency, the variable pitch control system controls the blades to rotate relative to the hub under the power supply action of the main power supply, so that the front ends of the blades rotate to the direction facing the wind direction, namely, to the feathering position parallel to the wind direction, the landing area of the blades is minimum, and the wind turbine set is quickly shut down by utilizing air resistance braking, so that the safety of the wind turbine set is ensured.
If the power supply of the main power supply fails, the spare battery in the hub drives the variable-pitch device to act, so that the feathering action is completed, and the unit is stopped.
However, the two types of pitch control are implemented by driving a pitch driving motor to complete feathering shutdown through electric energy, once the failure of the simultaneous power supply of a main power supply and a standby battery causes failure of a pitch system, if the wind turbine generator runs at an overspeed, the pitch system cannot control blades to complete feathering shutdown actions, the wind turbine generator is very likely to have runaway and tower collapse accidents, and certain potential safety hazards still exist.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the wind turbine generator system among the prior art's the main power supply of the oar system and the backup battery power supply when breaking down failure simultaneously, become the unable feathering action of accomplishing of oar system, still have certain potential safety hazard.
The utility model discloses a wind turbine generator system overspeed control device installs in wind turbine generator system's wheel hub, include:
the three groups of overspeed control subsystems are driven to respectively control the three groups of blades to rotate so as to complete the pitch variation action;
the overspeed detection device is used for monitoring the rotating speed of the wind turbine generator in real time;
each group of overspeed control subsystems comprises a pneumatic device and a variable pitch drive transmission device, at least one overspeed detection device is electrically connected with the pneumatic device, the pneumatic device is meshed with the variable pitch drive transmission device, the variable pitch drive transmission device is meshed with a gear ring, and the gear ring and blades are fixed;
when monitoring overspeed, at least one overspeed detection device sends an overspeed signal to a controller, the controller controls the pneumatic device to start, the pneumatic device is controlled to start, the variable pitch drive transmission device is driven to rotate, and the gear ring rotates along with the rotation of the variable pitch drive transmission device.
Preferably, the wind turbine generator overspeed control device comprises a variable pitch drive motor, a variable pitch drive shaft, a first gear and a variable pitch drive gear,
the first gear is installed on a motor output shaft of the variable pitch driving motor and meshed with the pneumatic device, a variable pitch driving shaft is coaxially arranged at the output tail end of the motor output shaft, the variable pitch driving gear is installed on the variable pitch driving shaft, and the variable pitch driving gear is meshed with the gear ring.
Preferably, the wind turbine generator overspeed control device comprises:
the gas energy storage device is used for storing compressed gas, and a first electromagnetic valve is arranged at a gas outlet of the gas energy storage device and is used for controlling the on-off of the gas energy storage device;
the air inlet end of the air cylinder is connected with the gas energy storage device, the air outlet end of the air cylinder is meshed with the first gear, a second electromagnetic valve is arranged on the air cylinder, and the second electromagnetic valve is opened when the wind turbine generator normally operates;
the overspeed detection devices comprise three overspeed detection devices, and when at least two overspeed detection devices detect overspeed, the first electromagnetic valve opens the gas energy storage device to drive the cylinder to do telescopic motion.
Preferably, the wind turbine generator system overspeed control device, the air inlet end of the air cylinder is connected with the air outlet end of the gas energy storage device through a gas pipeline, the air outlet end of the air cylinder is provided with a piston rod, the piston rod is provided with a rack, and the rack is engaged with the first gear.
Preferably, in the overspeed control device for the wind turbine generator, the second electromagnetic valve is arranged at the air inlet end of the air cylinder.
Preferably, the wind turbine generator overspeed control device is provided with a gas pressure monitoring device on the gas energy storage device.
Preferably, the wind turbine generator overspeed control device comprises a gas pressure monitoring device
The gas pressure sensor is used for monitoring the gas pressure in the gas energy storage device in real time;
the data acquisition device is connected with the gas pressure sensor and acquires a pressure value monitored by the gas pressure sensor, and the pressure value is processed by the processor and sends an alarm signal when the pressure value is abnormal;
and the server alarm device is connected with the processor, receives the alarm signal and gives an alarm.
Preferably, in the overspeed control device for the wind turbine generator, a safety valve is arranged at the gas outlet end of the gas pipeline, which is close to the gas energy storage device.
Preferably, in the overspeed control device for the wind turbine generator, a pressure release valve is arranged on the gas pipeline close to the gas inlet end of the cylinder.
Preferably, in the overspeed control device for a wind turbine generator, the number of teeth of the first gear is less than the number of teeth of the pitch drive gear.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a wind turbine generator system overspeed control device, including installing three groups of overspeed control subsystems in the wind turbine generator system wheel hub, overspeed detection device real-time supervision main shaft's rotational speed, send the overspeed signal to the controller when detecting the overspeed, the controller receives the overspeed signal and controls three groups of overspeed control subsystems and drive respectively correspondingly three groups of paddle blade rotation respectively thereby realize the regulation of pitch angle, accomplish the change oar action; the defects that the motor inertia of the motor for controlling the pitch of the existing wind turbine generator is large, the dynamic response capability is poor, and the motor is easy to damage are overcome; the structure is more reliable, the motor can still drive the pitch under the condition that the pitch drive fails when the wind turbine generator system is overspeed, and a protection barrier is added compared with the existing motor pitch system.
2. The utility model provides a pair of wind turbine generator system overspeed control device, the overspeed control subsystem includes pneumatic means and becomes oar drive transmission, and pneumatic means and the meshing of becoming oar drive transmission become oar drive transmission and ring gear meshing, become oar through pneumatic drive, thereby change the rotation of gear into by rack straight line action and realize becoming the oar, simplified mechanical structure, the structure is more reliable.
3. The utility model provides a pair of wind turbine generator system overspeed control device becomes oar drive transmission including becoming oar driving motor, becoming oar drive shaft, first gear and becoming oar drive gear, first gear install motor output shaft and with the pneumatic means transmission is connected, becomes oar drive gear cover and establishes in becoming the oar drive shaft, and the terminal coaxial change oar drive shaft that is provided with of output of motor output shaft becomes oar drive gear and ring gear meshing, ensures that first gear is the same with the angular velocity that becomes oar drive gear.
4. The utility model provides a pair of wind turbine generator system overspeed control device, pneumatic means include gaseous energy memory and cylinder, and gaseous energy memory drives actuating cylinder and is flexible action for the cylinder provides the air supply, and the cylinder passes through rack toothing with first gear, turns into the rotation of first gear with the linear motion of rack to become oar drive gear and can rotate along with the rotation of first gear, thereby accomplish and become the oar.
5. The utility model provides a pair of wind turbine generator system overspeed control device, the inlet end of cylinder is equipped with the second solenoid valve, opens the pressure balance who guarantees the cylinder both sides when wind turbine generator system rotational speed is normal, and the end of giving vent to anger is equipped with the relief valve, when wind turbine generator system rotational speed resumes normal operating, leaks away the high-pressure gas in cylinder and the gas pipeline, reduces the inside gas pressure of cylinder and gas pipeline.
6. The utility model provides a pair of wind turbine generator system overspeed control device is equipped with gas pressure monitoring devices on the gas energy memory, monitors gas energy memory's inside gas pressure constantly, guarantees to have sufficient gaseous operating condition who satisfies overspeed control device among the gas energy memory, ensures that pneumatic means can drive and becomes oar drive transmission and rotate and drive the paddle and rotate and accomplish the feathering.
7. The utility model provides a pair of wind turbine generator system overspeed control device, the number of teeth of first gear is less than the number of teeth that becomes oar drive gear, improves the drive ratio.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of the present invention;
fig. 2 is a schematic partial structure view of fig. 1 according to the present invention;
FIG. 3 is a schematic structural diagram of a set of overspeed control subsystems of the present invention;
fig. 4 is a schematic view of the operating principle of the overspeed control device.
Description of reference numerals:
1-an overspeed detection device;
2-a gas energy storage device; 21-a first solenoid valve; 22-gas pressure monitoring means;
3-a cylinder; 31-a piston rod; 32-a rack; 33-a second solenoid valve;
4-motor output shaft; 5-a first gear; 6-variable pitch drive gear; 7-a gear ring; 8-a gas pipeline; 9-safety valve; 10-a pressure relief valve; 11-a variable pitch drive motor; 12-blade.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1 to 4, the overspeed control device of the wind turbine generator of the present embodiment is installed in a hub of the wind turbine generator, and includes three sets of overspeed control subsystems, three sets of overspeed detection devices 1a, 1b, 1c, and a controller, where the three sets of overspeed control subsystems are respectively connected to three blades 12 and control the corresponding blades 12 to rotate to realize adjustment of pitch angle, and complete pitch change; the overspeed detection device 1 is arranged near three blades 12 in a hub and used for monitoring the rotating speed of a hub main shaft in real time, the centrifugal force of the main shaft is in direct proportion to the square of the rotating speed, and the overspeed detection device 1 calculates the centrifugal force of the main shaft according to the detected rotating speed so as to judge whether the main shaft exceeds the preset maximum rotating speed under normal operation; a controller (not shown) is electrically connected with the three groups of overspeed detection devices 1a, 1b and 1c and the three groups of overspeed control subsystems; when at least two (for example, 1a, 1b) of the three overspeed detection devices 1a, 1b, 1c detect overspeed, the overspeed detection devices 1a, 1b send an overspeed signal to the controller, and the controller receives the overspeed signal and controls the overspeed control subsystem to drive the corresponding blade 12 to rotate so as to adjust the pitch angle, thereby completing the pitch action. The three overspeed detection devices 1a, 1b and 1c are arranged to reduce the problem that the single overspeed detection device causes misoperation of an overspeed control device due to faults so that a wind turbine generator is stopped. The output enables the pneumatic device to be electrified and started, the variable-pitch driving transmission device is driven to act to adjust the pitch angle of the blades 12 to complete the variable-pitch action, the rotating speed of the wind turbine generator is rapidly reduced to stop, and the safety performance of the wind turbine generator is improved.
For example, three overspeed detecting devices 1a, 1b, 1c are connected to the input of the controller, and the first solenoid valve 21 and the second solenoid valve 33 are connected to the output of the controller through a relay, respectively. More preferably, a storage battery for supplying direct current power can be arranged at the input end of the controller, and a status indicator lamp is arranged at the output end of the controller.
The three groups of overspeed control subsystems have the same structure and respectively comprise a pneumatic device and a variable pitch drive transmission device, the input end of the pneumatic device is electrically connected with the output end of the controller, the output end of the pneumatic device is in meshing transmission connection with the variable pitch drive transmission device, the variable pitch drive transmission device is meshed with the gear ring 7, and the blades 12 are fixed on the outer side of the gear ring 7.
As shown in fig. 1 to 4, the pneumatic device includes a gas energy storage device 2 and a cylinder 3, the gas energy storage device 2 is connected with the cylinder 3 through a gas pipeline 8, a sufficient amount of high-pressure gas is stored in the gas energy storage device 2 and supplies gas source power to the cylinder 3 through the gas pipeline 8, and the cylinder 3 is driven to perform telescopic action so as to drive the pitch angle driving transmission device to rotate to realize pitch angle adjustment of the blades; the gas energy storage device 2 can be an existing high-pressure gas storage tank, a first electromagnetic valve 21 is arranged on a gas outlet of the gas energy storage device, the first electromagnetic valve 21 is connected with an output end of the controller, and the gas outlet is controlled to be opened and closed through the first electromagnetic valve 21; a second electromagnetic valve 33 is arranged at the air inlet end of the cylinder 3, namely the end connected with the gas pipeline 8, and the second electromagnetic valve 33 is electrically connected with the controller; the air outlet end of the cylinder 3, namely the end far away from the air pipeline 8, is provided with a piston rod 31, the piston rod 31 is provided with a rack 32, and the cylinder 3 is meshed with the variable pitch drive transmission device through the rack 32.
When the wind turbine generator normally operates, the output switch connected with the first electromagnetic valve is disconnected by the controller, the driving coil of the first electromagnetic valve 21 is not electrified, the first electromagnetic valve 21 is closed, meanwhile, the output switch connected with the second electromagnetic valve 33 is closed by the controller, the driving coil of the second electromagnetic valve 33 is electrified, and the second electromagnetic valve 33 is opened, so that the pressure balance of the two sides of the cylinder 3 is ensured; when the overspeed detection device 1 detects that the wind turbine generator is overspeed, the controller receives an overspeed signal, an output switch connected with the first electromagnetic valve 21 is closed, so that a driving coil of the first electromagnetic valve 21 is electrified and a valve is opened, the gas energy storage device 2 is opened, meanwhile, the output switch connected with the second electromagnetic valve 33 is disconnected, the driving coil of the second electromagnetic valve 33 is not electrified, and the second electromagnetic valve 33 is closed; high-pressure gas enters the cylinder 3 from the gas energy storage device 2 through the gas pipeline 8, the piston rod 31 of the cylinder 3 is driven by the high-pressure gas to do telescopic action to drive the rack 32 to do linear telescopic action, so that the variable pitch driving transmission device is driven to rotate, and the linear action of the rack 32 is converted into the rotation of the variable pitch driving transmission device.
The gas pressure monitoring device 22 is arranged on the gas energy storage device 2, the gas pressure monitoring device 22 comprises a pressure monitoring sensor, a data acquisition device and a server alarm device, and the gas pressure sensor 22 is used for monitoring the gas pressure in the gas energy storage device 2 in real time; the data acquisition device is connected with the gas pressure sensor and acquires a pressure value monitored by the gas pressure sensor, and the pressure value is processed by the processor and sends an alarm signal when the pressure value is abnormal; and the server alarm device is connected with the processor, receives the alarm signal and gives an alarm. When the high-pressure gas in the gas energy storage device 2 is insufficient, the work of the overspeed control device cannot be met, the gas cylinder 3 cannot be driven to drive the variable pitch drive transmission device to rotate so as to adjust the pitch angle, the gas pressure monitoring device 22 can give an alarm through the server alarm device, and the worker is reminded to stop the machine and timely supplement the high-pressure gas in the gas energy storage device 2 so as to meet the normal operation of the overspeed control device. The gas pressure sensor, the data acquisition device and the server alarm device can be of the existing structure, and the structure and the working principle of the gas pressure sensor and the data acquisition device are not described herein.
As shown in fig. 1 to 3, a safety valve 9 is disposed on the gas pipe 8 near the gas outlet end of the gas energy storage device 2. The safety valve 9 is arranged to ensure the safety of the whole system, and when the device acts, if the high-pressure gas in the gas energy storage device 2 is released and exceeds the maximum pressure which can be borne by the system, the safety valve 9 is opened at the moment, the overpressure gas is removed, and the system is prevented from being damaged.
As shown in fig. 1 to 3, a pressure relief valve 10 is provided on the gas pipe 8 near the gas inlet end of the cylinder 3. When the wind turbine generator system is overspeed, and under the condition that an original pitch control system on the wind turbine generator system is out of order, after the overspeed control device is started to control the wind turbine generator system to stop, high-pressure gas still exists in the cylinder 3 and the gas pipeline 8. The gas pressure inside the system can be reduced by means of the pressure relief valve 10 when it is necessary to restore the normal operation of the unit.
As shown in fig. 1 to 3, the variable pitch drive transmission device includes a variable pitch drive motor 11, a variable pitch drive shaft, a first gear 5 and a variable pitch drive gear 6, the first gear 5 is sleeved on a motor output shaft 4 of the variable pitch drive motor 11, the variable pitch drive motor 11 acts on the first gear 5, the variable pitch drive gear 6 is arranged on the variable pitch drive shaft (not shown), the variable pitch drive shaft is coaxially arranged at an output end of the motor output shaft 4, so that the variable pitch drive shaft and the motor output shaft are coaxially arranged and in transmission connection, the first gear 5 and the variable pitch drive gear 6 have the same angular velocity, the first gear 5 is engaged with the rack 32, and the variable pitch drive gear 6 is engaged with the gear ring 7. When the cylinder 3 is driven by the air pressure of the gas energy storage device 2 to perform telescopic action, the linear motion of the rack 32 is converted into the rotation of the first gear 5, and the variable pitch driving gear 6 rotates along with the rotation of the first gear 5, so that the gear ring 7 meshed with the variable pitch driving gear is driven to rotate, the adjustment of the pitch angle of the blade 12 is realized, the variable pitch action is completed, the rotating speed of the wind turbine generator is rapidly reduced to stop, and the safety performance of the wind turbine generator is ensured. In another alternative embodiment, the motor output shaft and the pitch drive shaft may be the same shaft, and the first gear and the pitch drive gear are respectively arranged at two ends of the shaft at intervals.
In addition, when the wind turbine generator needs to change the pitch during normal operation, the first gear 5 can be driven to rotate by the pitch driving motor 11, the pitch driving shaft and the pitch driving gear 6 are driven to rotate, so that the pitch angle of the blade is adjusted to change the pitch, the first gear 5 rotates to drive the rack 32 and the piston rod 31 of the air cylinder 3 to do telescopic linear motion, and the normal operation of the wind turbine generator overspeed control device in the application is not affected.
The number of teeth of the first gear 5 is smaller than that of the variable pitch driving gear 6, so that the transmission ratio is improved.
As an alternative embodiment, the overspeed detecting device 1a, 1b, 1c of the present embodiment may be an existing mechanical overspeed detecting device, the structure and operation of which are not described herein.
As another alternative, the controller of this embodiment may be an existing PLC controller, and the structure and operation principle thereof are not described herein.
As a third alternative embodiment, the number of overspeed detecting devices 1 can also be one or two.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a wind turbine generator system overspeed control device installs in wind turbine generator system's wheel hub which characterized in that includes:
the three groups of overspeed control subsystems are driven to respectively control the three groups of blades (12) to rotate to complete pitch variation;
the overspeed detection device (1) is used for monitoring the rotating speed of the wind turbine generator in real time;
each group of overspeed control subsystems comprises a pneumatic device and a variable pitch drive transmission device, at least one overspeed detection device (1) is electrically connected with the pneumatic device, the pneumatic device is meshed with the variable pitch drive transmission device, the variable pitch drive transmission device is meshed with a gear ring (7), and the gear ring (7) and blades (12) are fixed;
when monitoring overspeed, at least one overspeed detection device (1) sends an overspeed signal to a controller, the controller controls the pneumatic device to start, the variable pitch drive transmission device is driven to rotate, and the gear ring (7) rotates along with the rotation of the variable pitch drive transmission device.
2. The wind turbine generator overspeed control device according to claim 1, characterized in that the pitch drive transmission comprises a pitch drive motor (11), a pitch drive shaft, a first gear (5) and a pitch drive gear (6),
the first gear (5) is installed on a motor output shaft (4) of the variable pitch driving motor (11) and meshed with the pneumatic device, a variable pitch driving shaft is coaxially arranged at the output tail end of the motor output shaft (4), the variable pitch driving gear (6) is installed on the variable pitch driving shaft, and the variable pitch driving gear (6) is meshed with the gear ring (7).
3. The wind turbine generator overspeed control apparatus of claim 2, wherein said pneumatic device comprises:
the gas energy storage device (2) is used for storing compressed gas, a first electromagnetic valve (21) is arranged at a gas outlet of the gas energy storage device, and the first electromagnetic valve (21) is used for controlling the opening and closing of the gas energy storage device (2);
the air inlet end of the air cylinder (3) is connected with the gas energy storage device (2), the air outlet end of the air cylinder is meshed with the first gear (5), a second electromagnetic valve (33) is arranged on the air cylinder (3), and when the wind turbine generator normally operates, the second electromagnetic valve (33) is opened;
the overspeed detection devices (1) comprise three overspeed detection devices, and when at least two overspeed detection devices (1) detect overspeed, the first electromagnetic valve (21) opens the gas energy storage device (2) to drive the cylinder (3) to do telescopic motion.
4. The overspeed control device of wind turbine generator according to claim 3, characterized in that the air inlet end of the cylinder (3) is connected to the air outlet end of the gas energy storage device (2) through a gas pipeline (8), the air outlet end of the cylinder (3) is provided with a piston rod (31), the piston rod (31) is provided with a rack (32), and the rack (32) is engaged with the first gear (5).
5. The wind turbine overspeed control apparatus according to claim 4, characterized in that the second solenoid valve (33) is provided at an intake end of the cylinder (3).
6. The overspeed control device of wind turbine generator according to claim 5, characterized in that a gas pressure monitoring device (22) is provided on the gas energy storage device (2).
7. Wind turbine overspeed control device according to claim 6, characterized in that said gas pressure monitoring device (22) comprises
The gas pressure sensor is used for monitoring the gas pressure in the gas energy storage device in real time;
the data acquisition device is connected with the gas pressure sensor and acquires a pressure value monitored by the gas pressure sensor, and the pressure value is processed by the processor and sends an alarm signal when the pressure value is abnormal;
and the server alarm device is connected with the processor, receives the alarm signal and gives an alarm.
8. The overspeed control device of wind turbine generator according to claim 4, characterized in that a safety valve (9) is provided on the gas pipe (8) near the gas outlet end of the gas energy storage device (2).
9. The overspeed control device of wind turbine generator according to claim 8, characterized in that a pressure relief valve (10) is provided on the gas duct (8) near the inlet end of the cylinder (3).
10. Wind turbine generator overspeed control device according to any of claims 2 to 9, characterized in that the number of teeth of the first gear (5) is smaller than the number of teeth of the pitch drive gear (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920328844.7U CN210087544U (en) | 2019-03-14 | 2019-03-14 | Wind turbine generator system overspeed control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920328844.7U CN210087544U (en) | 2019-03-14 | 2019-03-14 | Wind turbine generator system overspeed control device |
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| CN210087544U true CN210087544U (en) | 2020-02-18 |
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| CN201920328844.7U Active CN210087544U (en) | 2019-03-14 | 2019-03-14 | Wind turbine generator system overspeed control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283046A (en) * | 2020-11-27 | 2021-01-29 | 林新福 | Energy-saving and environment-friendly transmission loss reduction structure of wind driven generator |
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2019
- 2019-03-14 CN CN201920328844.7U patent/CN210087544U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283046A (en) * | 2020-11-27 | 2021-01-29 | 林新福 | Energy-saving and environment-friendly transmission loss reduction structure of wind driven generator |
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