CN109058334B - Control method for monitoring abrasion of friction plate of yaw brake of wind generating set - Google Patents
Control method for monitoring abrasion of friction plate of yaw brake of wind generating set Download PDFInfo
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- CN109058334B CN109058334B CN201811001914.4A CN201811001914A CN109058334B CN 109058334 B CN109058334 B CN 109058334B CN 201811001914 A CN201811001914 A CN 201811001914A CN 109058334 B CN109058334 B CN 109058334B
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- wear
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000005299 abrasion Methods 0.000 title claims abstract description 24
- 239000002783 friction material Substances 0.000 claims abstract description 35
- 238000012423 maintenance Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 7
- 201000009482 yaws Diseases 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0244—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking
- F03D7/0248—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking by mechanical means acting on the power train
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a control method for monitoring wear of a friction plate of a yaw brake of a wind generating set. The following technical scheme is adopted: step 1: firstly, setting the alarm thickness of a friction material of a yaw friction plate, and accumulating a yaw angle to a wear angle if the average yaw residual pressure in the yaw process is more than or equal to 5bar after the wind generating set yaws; step 2: calculating to obtain the thickness of the friction material of the current yaw friction plate at least by utilizing the abrasion angle; and step 3: comparing the current thickness of the friction material of the yaw friction plate with the set alarm thickness of the friction material, and if the current thickness of the friction material is smaller than or equal to the set value, sending an alarm signal by a monitoring system to remind maintenance personnel to check and replace the yaw friction plate; and 4, step 4: and after the yaw friction plate is replaced, resetting the total yaw angle of the system, thereby realizing the control of monitoring the wear of the friction plate of the new yaw brake.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a control method for monitoring abrasion of a friction plate of a yaw brake of a wind generating set.
Background
At present, a yaw brake system of a large wind generating set mainly comprises a yaw brake and a yaw brake disc. The yaw brake disc and the yaw slewing bearing are fixedly connected through bolts so as to be capable of synchronously moving; the yaw brake has three states: the yaw brake state is that the yaw brake brakes in a full-pressure mode at the moment, and a friction plate of the yaw brake is tightly pressed with a yaw brake disc, so that the wind generating set stably faces the wind direction to generate electricity; secondly, in a yaw half-open state (yaw process), residual pressure still exists in a yaw brake at the time, and a friction plate of the yaw brake is in contact friction with a yaw brake disc to ensure that the wind generating set stably yaws; and thirdly, in a yaw full-open state (yaw untwisting), the pressure of a yaw brake is zero, the positive pressure of a yaw brake friction plate and a yaw brake disc is zero, and the yaw friction plate is free from abrasion consumption.
The friction plates are not abraded in the yaw braking state and the yaw full-open state; the abrasion of the friction plate occurs in a yaw half-open state, most field maintenance personnel regularly check the abrasion state of the brake friction plate at present, and the brake friction plate is replaced after the abrasion is found to be serious through checking. However, different units in a wind field usually have different yaw frequencies and angles due to different machine positions, so that the problem of difference in wear rates of yaw friction plates of the units is caused. The current monitoring method needs maintenance personnel to check the abrasion state of the friction plate of the brake at intervals, the labor intensity is high, and the problem of damage to a yawing brake disc can be caused if the abrasion state is not checked in time. Or a wear sensor is added on the yaw brake for thickness detection, so that the production cost of the product is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the control method for monitoring the abrasion of the friction plate of the yaw brake of the wind generating set is simple, convenient and efficient, and can be implemented without additional hardware installation.
In order to achieve the purpose, the invention adopts the following technical scheme:
step 1: firstly, setting the alarm thickness of a friction material of a yaw friction plate, and accumulating a yaw angle to a wear angle if the average yaw residual pressure in the yaw process is more than or equal to 5bar after the wind generating set yaws;
step 2: calculating to obtain the thickness of the friction material of the current yaw friction plate at least by utilizing the abrasion angle;
and step 3: comparing the current thickness of the friction material of the yaw friction plate with the set alarm thickness of the friction material, and if the current thickness of the friction material is smaller than or equal to the set value, sending an alarm signal by a monitoring system to remind maintenance personnel to check and replace the yaw friction plate;
and 4, step 4: and after the yaw friction plate is replaced, resetting the total yaw angle of the system, thereby realizing the control of monitoring the wear of the friction plate of the new yaw brake.
The control method for monitoring the abrasion of the friction plate of the yaw brake of the wind generating set is characterized by comprising the following steps of: the alarming thickness of the friction material of the yawing friction plate comprises a pre-replacement thickness and a replacement thickness which are respectively set to be 3mm and 2 mm.
The control method for monitoring the abrasion of the friction plate of the yaw brake of the wind generating set is characterized by comprising the following steps of: in the step 1, the average yaw residual pressure is more than or equal to 5bar and is used for removing the angle accumulated by yaw, cable release and zero pressure yaw.
The control method for monitoring the abrasion of the friction plate of the yaw brake of the wind generating set is characterized by comprising the following steps of: the yaw angle is acquired through a yaw proximity switch or a yaw encoder.
The control method for monitoring the abrasion of the friction plate of the yaw brake of the wind generating set is characterized in that in the step 2, the calculation formula of the thickness of the friction material of the current yaw friction plate is as follows:
wherein,the thickness of the friction material of the current yaw friction plate, h is the total thickness of the friction material of the yaw friction plate,
The wear rate of the yaw friction plate,
For yaw braking work,
The contact area of the yaw friction plate,
Is a wear angle,
Yaw brake torque provided by a single yaw brake.
The control method for monitoring the abrasion of the friction plate of the yaw brake of the wind generating set is characterized by comprising the following steps of: and comparing the linear abrasion loss of the current friction plate with the set maximum linear abrasion loss of the yaw friction plate, and if the linear abrasion loss of the current friction plate is greater than the set maximum linear abrasion loss, the monitoring system can give a warning to remind maintenance personnel to check and replace the yaw friction plate.
The invention has the following advantages: the wear state of the yaw friction plate can be effectively monitored without adding hardware equipment. The yaw brake has wide applicability to yaw brakes of different manufacturers. Compared with the traditional wear monitoring method, the method can greatly reduce the shutdown maintenance time of the wind generating set, save the labor cost, improve the utilization rate of the generating equipment and reduce the loss of the generating capacity. The yaw brake without the wear sensor can be applied.
Drawings
FIG. 1 is a control flow chart of wear monitoring of a friction plate of a yaw brake of a wind generating set.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the invention discloses a control method for monitoring wear of a friction plate of a yaw brake of a wind generating set, which comprises the following steps:
step 1: setting the alarming thickness of a friction material of a yaw friction plate (a safety value for preventing a brake disc from being damaged due to the fact that the friction material is exhausted), and accumulating a yaw angle to a wear angle if the average yaw residual pressure in the yaw process is larger than or equal to 5bar after the wind generating set yaws, wherein the yaw angle is acquired through a yaw proximity switch or a yaw encoder.
Step 2: and calculating to obtain the current thickness of the friction material of the yaw friction plate by using at least the abrasion angle.
And step 3: and comparing the thickness of the friction material of the current yaw friction plate with the set alarm thickness of the friction material, and if the thickness of the current friction material is smaller than or equal to the set value, sending an alarm signal by a monitoring system to remind maintenance personnel to check and replace the yaw friction plate.
And 4, step 4: and after the yaw friction plate is replaced, resetting the total yaw angle of the system, thereby realizing the control of monitoring the wear of the friction plate of the new yaw brake.
And when the unit generates a yaw command, the unit executes a yaw action. A yaw encoder or yaw proximity switch collects yaw angle data. And a hydraulic station pressure relay acquires yaw pressure data in the yaw process. And after the yawing is finished, calculating the average yawing pressure in the yawing process, and if the average yawing pressure is more than or equal to 5 bar. The angle of this yaw is accumulated to the wear angle. Otherwise, the wear angle is not taken into account. The method accumulates the total angle of the unit under pressure yaw, and avoids the interference of the yaw angle when the unit is untwisted.
By passing
The total braking work of the individual yaw brakes is calculated. Then according to the following steps:
and calculating the thickness of the friction material of the current yaw friction plate. And if the current thickness of the friction material is more than or equal to the preset alarm thickness of the friction material, the unit continues to normally operate, otherwise, a yaw friction plate abrasion signal is sent out, and maintenance personnel are reminded to check and replace the friction plate. After the friction disc is changed, the maintainer must reset the wear angle. Thereafter, the control flow is continued. In the above-mentioned formula,
the thickness of the friction material of the current yaw friction plate is h, and the friction of the yaw friction plate is hThe total thickness of the wiping material,
The wear rate of the yaw friction plate,
For yaw braking work,
Is the contact area of the yaw friction plateIs a wear angle,
Yaw brake torque provided by a single yaw brake. The above-mentioned basic technical parameters can be measured by the related tests of the friction plate.
Furthermore, the alarming thickness of the friction material of the yawing friction plate comprises a pre-replacement thickness and a replacement thickness which are respectively set to be 3mm and 2 mm. Correspondingly, a warning signal is sent to remind maintenance personnel to purchase and replace the yaw friction plate.
Further, in step 1, the average yaw residual pressure is greater than or equal to 5bar, and is used for removing an angle accumulated by yaw, cable release, zero pressure and yaw. There are two main cases of cumulative yaw angle: one is yawing (the residual yawing pressure is about 20-40 bar), and the other is untwisting (the residual yawing pressure is 0bar, and no friction plate loss exists in the state), so that the angle accumulated by zero pressure and yawing of the yawing untwisting cable is removed, and the residual is the effective accumulated yawing angle.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are included in the scope of the present invention.
Claims (6)
1. A control method for monitoring wear of a friction plate of a yaw brake of a wind generating set is characterized by comprising the following steps:
step 1: firstly, setting the alarm thickness of a friction material of a yaw friction plate, and accumulating a yaw angle to a wear angle if the average yaw residual pressure in the yaw process is more than or equal to 5bar after the wind generating set yaws;
step 2: calculating to obtain the thickness of the friction material of the current yaw friction plate at least by utilizing the abrasion angle;
and step 3: comparing the current thickness of the friction material of the yaw friction plate with the set alarm thickness of the friction material, and if the current thickness of the friction material is smaller than or equal to the set value, sending an alarm signal by a monitoring system to remind maintenance personnel to check and replace the yaw friction plate;
and 4, step 4: and after the yaw friction plate is replaced, resetting the total yaw angle of the system, thereby realizing the control of monitoring the wear of the friction plate of the new yaw brake.
2. The control method for wear monitoring of the friction plate of the yaw brake of the wind generating set according to claim 1, wherein the control method comprises the following steps: the alarming thickness of the friction material of the yawing friction plate comprises a pre-replacement thickness and a replacement thickness which are respectively set to be 3mm and 2 mm.
3. The control method for wear monitoring of the friction plate of the yaw brake of the wind generating set according to claim 1, wherein the control method comprises the following steps: in the step 1, the average yaw residual pressure is more than or equal to 5bar and is used for removing the angle accumulated by yaw, cable release and zero pressure yaw.
4. The control method for wear monitoring of the friction plate of the yaw brake of the wind generating set according to claim 1, wherein the control method comprises the following steps: the yaw angle is acquired through a yaw proximity switch or a yaw encoder.
5. The control method for wear monitoring of the friction plate of the yaw brake of the wind generating set according to claim 1, wherein the control method comprises the following steps: in step 2, the current yaw friction plate friction material thickness is calculated by using at least two parameters of a wear angle and a wear rate of the yaw friction plate.
6. The control method for wear monitoring of the friction plate of the yaw brake of the wind generating set according to claim 5, wherein the control method comprises the following steps: the calculation formula of the thickness of the friction material of the current yaw friction plate is as follows:
wherein,
the thickness of the friction material of the current yaw friction plate, h is the total thickness of the friction material of the yaw friction plate,
The wear rate of the yaw friction plate,
For yaw braking work,
Is the contact area of the yaw friction plate
Is a wear angle,Yaw brake torque provided by a single yaw brake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811001914.4A CN109058334B (en) | 2018-08-30 | 2018-08-30 | Control method for monitoring abrasion of friction plate of yaw brake of wind generating set |
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| CN201811001914.4A CN109058334B (en) | 2018-08-30 | 2018-08-30 | Control method for monitoring abrasion of friction plate of yaw brake of wind generating set |
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| CN109058334B true CN109058334B (en) | 2020-02-07 |
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| CN110206836B (en) * | 2019-06-18 | 2021-05-25 | 天津瑞源电气有限公司 | Spring-loaded brake wear detection system and detection method thereof |
| CN110530251A (en) * | 2019-08-22 | 2019-12-03 | 射阳远景能源科技有限公司 | A kind of device and monitoring method of the thickness monitoring friction plate |
| CN110905734B (en) * | 2019-12-13 | 2021-05-07 | 中国船舶重工集团海装风电股份有限公司 | Wind turbine generator yaw brake pad wear monitoring method |
| CN111306009B (en) * | 2020-03-18 | 2022-03-08 | 西安热工研究院有限公司 | Method for online measurement of abrasion loss of brake disc of fan yaw system |
| CN111562104B (en) * | 2020-04-23 | 2022-04-15 | 广东水电二局股份有限公司 | Detection and maintenance method for yaw hydraulic caliper disc brake |
| CN112413018B (en) * | 2020-11-18 | 2022-07-15 | 潍柴动力股份有限公司 | Wear alarm method, device, equipment and storage medium of electronic clutch |
| CN114673745B (en) * | 2022-03-30 | 2023-10-27 | 中汽创智科技有限公司 | Digital twinning-based friction plate management method, system, vehicle and medium |
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