CN113374650A - Variable pitch bearing abnormal sound detection device and method of wind generating set - Google Patents
Variable pitch bearing abnormal sound detection device and method of wind generating set Download PDFInfo
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- CN113374650A CN113374650A CN202110468526.2A CN202110468526A CN113374650A CN 113374650 A CN113374650 A CN 113374650A CN 202110468526 A CN202110468526 A CN 202110468526A CN 113374650 A CN113374650 A CN 113374650A
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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
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Abstract
The invention discloses a pitch bearing abnormal sound detection device and method of a wind generating set, which comprises the following steps: the device comprises a plurality of wireless sensors, a signal acquisition and transmission module and a terminal detection module. At least one wireless sensor is arranged at preset positions of a variable pitch bearing, a blade and a tower of each wind generating set. The wireless sensor collects vibration signals of the abnormal sound variable pitch bearing. The signal acquisition and transmission module is installed in a hub of the wind generating set, acquires a vibration signal of the abnormal sound variable pitch bearing of the wireless sensor and sends the vibration signal to the terminal detection module in a wireless transmission mode. And the terminal detection module analyzes the received vibration signal to generate an abnormal sound detection result. The device and the method for detecting the abnormal sound of the variable-pitch bearing of the wind generating set can quickly judge the vibration source and accurately judge the fault position of the variable-pitch bearing according to the detection result of the online detection of the abnormal sound.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a pitch bearing abnormal sound detection device and method of a wind generating set.
Background
With the research of wind power generation grid connection, an online vibration monitoring system is usually installed on a transmission chain of a wind generating set in actual production, a sensor is mainly installed on a main bearing, a gear box and a generator bearing seat, and a diagnosis conclusion is given through a vibration signal acquired by the online vibration monitoring system. When difficult and complicated diseases occur, abnormal sound of the wind turbine generator is difficult to position, and the reasons for the abnormal sound are various, such as foundation looseness, control strategy problems, blades, a tower barrel, a transmission chain and the like; the wind turbine tower barrel is taken as a large loudspeaker, and sound is reverberated inside the tower barrel; because the blades and the hub rotate in real time, the online vibration collector connected to the cabin by additionally arranging a vibration acceleration sensor and a cable cannot be realized. There is a problem that the faulty component cannot be located by the online vibration monitoring data.
Disclosure of Invention
Therefore, the device and the method for detecting the abnormal sound of the variable-pitch bearing of the wind generating set overcome the defect that a fault part cannot be positioned through online vibration monitoring data in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a pitch bearing abnormal sound detection apparatus for a wind turbine generator system, including: a plurality of wireless sensors, a signal acquisition and transmission module and a terminal detection module, wherein,
the system comprises a plurality of wireless sensors, a wind generating set and a control system, wherein at least one wireless sensor is arranged at preset positions of a variable pitch bearing, a blade and a tower of each wind generating set and used for acquiring a vibration signal of an abnormal sound variable pitch bearing;
the signal acquisition and transmission module is arranged in a hub of the wind generating set and used for acquiring vibration signals of the abnormal sound variable pitch bearing of the wireless sensor and sending the vibration signals to the terminal detection module in a wireless transmission mode;
and the terminal detection module is used for analyzing the received vibration signal to generate an abnormal sound detection result.
Optionally, the method further comprises: and the alarm module is used for generating an alarm signal when the abnormal sound detection result outputs an abnormal detection instruction.
Optionally, the signal acquisition and transmission module is further configured to perform wireless transmission after amplifying the vibration signal.
Optionally, the wireless sensor comprises: a wireless acceleration sensor.
Optionally, the wireless sensor further comprises: a wireless temperature sensor.
Optionally, the terminal detection module is further configured to preprocess the received vibration signal to obtain a high-quality vibration signal that can be used for subsequent analysis.
In a second aspect, an embodiment of the present invention provides a method for detecting abnormal noise of a pitch bearing of a wind turbine generator system, where based on the apparatus for detecting abnormal noise of a pitch bearing of a wind turbine generator system in the first aspect of the embodiment, the method includes:
acquiring vibration signals generated by the plurality of wireless sensors;
and analyzing and comparing the vibration signals of the plurality of wireless sensors at the current moment, and determining the abnormal sound fault position of the variable pitch bearing.
Optionally, before the step of analyzing and comparing the vibration signals of the plurality of wireless sensors at the current moment and determining the fault position of the abnormal sound of the pitch bearing, the method further includes:
and preprocessing the vibration signal to obtain a high-quality vibration signal which can be used for subsequent analysis.
Optionally, comparing waveform changes of the vibration signals of the plurality of wireless sensors at the current moment, and determining a fault position of abnormal sound of the pitch bearing.
Optionally, the fault position of the abnormal sound of the variable pitch bearing is determined according to the sequence of the waveform changes of the vibration signals of the plurality of wireless sensors at the current moment.
The technical scheme of the invention has the following advantages:
the invention provides a variable pitch bearing abnormal sound detection device and method of a wind generating set, wherein the detection device comprises the following components: the device comprises a plurality of wireless sensors, a signal acquisition and transmission module and a terminal detection module. At least one wireless sensor is arranged at preset positions of a variable pitch bearing, a blade and a tower of each wind generating set. The wireless sensor collects vibration signals of the abnormal sound variable pitch bearing. The signal acquisition and transmission module is installed in a hub of the wind generating set, acquires a vibration signal of the abnormal sound variable pitch bearing of the wireless sensor and sends the vibration signal to the terminal detection module in a wireless transmission mode. And the terminal detection module analyzes the received vibration signal to generate an abnormal sound detection result. The device and the method for detecting the abnormal sound of the variable-pitch bearing of the wind generating set can quickly judge the vibration source and accurately judge the fault position of the variable-pitch bearing according to the detection result of the online detection of the abnormal sound.
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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a module composition diagram of a specific example of a pitch bearing abnormal sound detection device of a wind turbine generator system according to an embodiment of the present invention;
fig. 2 is a schematic layout diagram of a wireless sensor of a pitch bearing abnormal sound detection device of a wind turbine generator system according to an embodiment of the present invention;
fig. 3 is a position relationship diagram of a blade, a pitch bearing and a hub of the pitch bearing abnormal sound detection device of the wind turbine generator system according to the embodiment of the present invention;
fig. 4 is a flowchart of a specific example of a method for detecting abnormal noise of a pitch bearing of a wind turbine generator system according to an embodiment of the present invention;
fig. 5 is an image of a waveform change of a specific example of a method for detecting abnormal sound of a pitch bearing of a wind turbine generator system according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The pitch bearing abnormal sound detection device of the wind generating set provided by the embodiment of the invention is applied to a fault detection scene of the pitch bearing of the wind generating set.
As shown in fig. 1, a pitch bearing abnormal sound detection apparatus of a wind turbine generator system provided in an embodiment of the present invention includes: the device comprises a plurality of wireless sensors, a signal acquisition and transmission module and a terminal detection module.
In a specific embodiment, a wireless sensor provided in an embodiment of the present invention includes: a wireless acceleration sensor. When abnormal sound signals of a variable-pitch bearing of a wind generating set are collected, along with the generation of instantaneous impact signals, the change of vibration signals needs to be quickly captured due to the fact that the impact signals are attenuated quickly, and therefore a wireless acceleration sensor is adopted. The wireless acceleration sensor is adopted, so that the calculation process of using a displacement sensor or a speed sensor is avoided, the calculation accuracy is improved, and the calculation error is reduced. In the practical application, for the acquisition of the impact signal, the use of a displacement sensor or a speed sensor can cause signal distortion, and the impact signal is not easy to capture. The wireless sensor may also be: and the wireless sensor integrates a wireless acceleration sensor and a wireless temperature sensor. When abnormal sound signals exist, the abnormal sound signals are accompanied by weak temperature changes, so that the wireless temperature sensor is added, and the detection result is more accurate. In practical application, the corresponding wireless sensor is selected according to practical requirements. Because the blade and the hub rotate in real time, the vibration signals of the blade are collected by installing a wireless sensor.
As shown in fig. 2, it is clear to those skilled in the art that a wind turbine generally includes three blades, each blade corresponds to a pitch bearing, and at least one wireless sensor is installed at the pitch bearing of each wind turbine, a preset position of the blade, and a preset position of the tower, and is used for acquiring a vibration signal of the pitch bearing. By way of example only, and not by way of limitation, in practical applications, the corresponding preset position is selected according to actual requirements. For example: on the blade and the tower, each wireless sensor is separated by a preset distance, the preset distance is not limited, and corresponding determination is carried out according to actual conditions. The preset number of detection points can be arranged on the variable pitch bearing, and the preset number is not limited. For example: the arrangement of the detection points of the variable-pitch bearing can be distributed in the clock direction, the detection points are arranged in the three-o-clock, six-o-clock, nine-o-clock and twelve-o-clock directions, the arrangement of the detection points is not limited, and corresponding setting is carried out according to actual requirements.
Fig. 3 shows the positional relationship of the blade, the pitch bearing and the hub. The inner ring and the outer ring of the variable pitch bearing are respectively connected with the blades through the bolts at the hub, when the wind direction changes, the variable pitch drive motor drives the variable pitch bearing to rotate so as to change the windward angle, so that the blades are kept in the optimal windward state, the lift force of the blades is controlled, and the aim of controlling the torque and the power on the blades can be achieved.
The signal acquisition and transmission module is installed in a hub of the wind generating set and used for acquiring vibration signals of the abnormal sound variable pitch bearing of the wireless sensor at the preset position of the blade and the tower and sending the vibration signals to the terminal detection module in a wireless transmission mode. Meanwhile, the signal acquisition and transmission module is also used for carrying out wireless transmission after amplifying the vibration signal. And amplifying the vibration signal under the condition of not changing the original waveform structure. And when the weak small signal is weakly changed, amplifying the signal, and searching a node where the signal change starts to change. The signal acquisition and transmission module can use any one of a local area network, mobile communication and a fan ring network for transmission, the transmission adopts a networking mode without limitation, and corresponding selection is carried out according to actual requirements.
The terminal detection module is located outside the wind generating set, and can use a PC (personal computer), a server or a microprocessor and other terminal detection equipment with an analysis processing function, wherein the terminal detection equipment is not limited here and is selected correspondingly according to actual requirements. The method is used for preprocessing the received vibration signal to obtain a high-quality vibration signal which can be used for subsequent analysis, and then analyzing the vibration signal to generate an abnormal sound detection result. Meanwhile, the analyzed vibration signal can be displayed, so that the detection result is more visual.
In a specific embodiment, the pitch bearing abnormal sound detection apparatus for a wind turbine generator system according to an embodiment of the present invention further includes: and the alarm module is used for generating an alarm signal when the abnormal sound detection result outputs an abnormal detection instruction. And accurately determining the failed variable pitch bearing according to the wireless sensor generating the abnormal sound detection result.
The pitch bearing abnormal sound detection device of the wind generating set provided by the embodiment of the invention comprises: the device comprises a plurality of wireless sensors, a signal acquisition and transmission module and a terminal detection module. At least one wireless sensor is arranged at preset positions of a variable pitch bearing, a blade and a tower of each wind generating set. The installation position of the wireless sensor is not limited herein, and other positions of the wind turbine generator system can be also adopted. The wireless sensor collects vibration signals of the abnormal sound variable pitch bearing. The signal acquisition and transmission module is installed in a hub of the wind generating set, acquires a vibration signal of the abnormal sound variable pitch bearing of the wireless sensor and sends the vibration signal to the terminal detection module in a wireless transmission mode. And the terminal detection module analyzes the received vibration signal to generate an abnormal sound detection result. The detection device provided by the embodiment of the invention can accurately judge the fault position of the variable pitch bearing according to the detection result of the online detection abnormal sound.
Example 2
The embodiment of the invention provides a method for detecting abnormal sound of a pitch bearing of a wind generating set, which is based on the device for detecting the abnormal sound of the pitch bearing of the wind generating set in the embodiment 1, and as shown in fig. 4, the method comprises the following steps:
step S1: and acquiring vibration signals generated by the plurality of wireless sensors.
Step S2: and analyzing and comparing the vibration signals of the plurality of wireless sensors at the current moment, and determining the abnormal sound fault position of the variable pitch bearing.
In a specific embodiment, the detection method provided in the embodiment of the present invention further includes: before the step of analyzing and comparing the vibration signals of the plurality of wireless sensors at the current moment and determining the abnormal sound fault position of the variable pitch bearing, the method further comprises the following steps of: and preprocessing the vibration signal to obtain a high-quality vibration signal which can be used for subsequent analysis. The vibration signals are preprocessed to obtain the usable high-quality vibration signals for subsequent analysis, and preparation is provided for better subsequent comparison of the vibration signals, so that the abnormal sound detection fault position of the variable-pitch bearing is more accurate.
In a specific embodiment, comparing waveform changes of the vibration signals of the plurality of wireless sensors at the current moment, and determining the abnormal sound fault position of the variable pitch bearing. Specifically, the fault position of the abnormal sound of the variable-pitch bearing can be determined according to the sequence of the waveform changes of the vibration signals of the plurality of wireless sensors at the current moment. The waveform changes first, and is closer to the vibration source, as shown in fig. 5, the waveform change images are collected at the blade 1 and the blade 2 at the same time, and the vibration of the blade 1 is known to be ahead of the vibration of the blade 2 according to the sequence of the waveform change of the vibration signal. By way of example only, and not by way of limitation, in practical applications, the waveform change may be analyzed according to a correlation algorithm, and the fault position of the abnormal sound of the pitch bearing may be determined.
The embodiment of the invention provides a method for detecting abnormal sound of a variable-pitch bearing of a wind generating set. According to the embodiment of the invention, the vibration signal acquired by the wireless sensor is compared with the sequence of the waveform change in the vibration signal at a certain moment, the change of the waveform can be visually identified, the vibration source can be rapidly judged, and the fault position of the variable pitch bearing can be accurately judged according to the detection result of the online detection of abnormal sound.
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 of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The utility model provides a wind generating set's becomes oar bearing abnormal sound detection device which characterized in that includes: a plurality of wireless sensors, a signal acquisition and transmission module and a terminal detection module, wherein,
the system comprises a plurality of wireless sensors, a wind generating set and a control system, wherein at least one wireless sensor is arranged at a preset position of each variable pitch bearing, blade and tower of the wind generating set and used for acquiring a vibration signal of an abnormal sound variable pitch bearing;
the signal acquisition and transmission module is arranged in a hub of the wind generating set and used for acquiring vibration signals of the abnormal sound variable pitch bearing of the wireless sensor and sending the vibration signals to the terminal detection module in a wireless transmission mode;
and the terminal detection module is used for analyzing the received vibration signal to generate an abnormal sound detection result.
2. The wind generating set's pitch bearing abnormal sound detection device of claim 1, further comprising: and the alarm module is used for generating an alarm signal when the abnormal sound detection result outputs an abnormal detection instruction.
3. The wind generating set's pitch bearing abnormal sound detection device of claim 2, characterized in that, signal acquisition transmission module is still used for carrying out wireless transmission after vibration signal amplification.
4. The wind generating set's variable pitch bearing abnormal sound detection device of claim 3, characterized in that, wireless sensor includes: a wireless acceleration sensor.
5. The wind generating set's variable pitch bearing abnormal sound detection device of claim 4, wherein wireless sensor further includes: a wireless temperature sensor.
6. The wind generating set's pitch bearing abnormal sound detection device of claim 5, wherein terminal detection module is further used for preprocessing the received vibration signal to obtain a usable high quality vibration signal for subsequent analysis.
7. A method for detecting abnormal noise of a variable-pitch bearing of a wind generating set, which is based on the device for detecting abnormal noise of the variable-pitch bearing of the wind generating set of any one of claims 1 to 6, and comprises the following steps:
acquiring vibration signals generated by the plurality of wireless sensors;
and analyzing and comparing the vibration signals of the plurality of wireless sensors at the current moment, and determining the abnormal sound fault position of the variable pitch bearing.
8. The method for detecting the abnormal sound of the variable-pitch bearing of the wind generating set according to claim 7, wherein before the step of analyzing and comparing the vibration signals of the plurality of wireless sensors at the current moment and determining the fault position of the abnormal sound of the variable-pitch bearing, the method further comprises the following steps:
and preprocessing the vibration signal to obtain a high-quality vibration signal which can be used for subsequent analysis.
9. The method for detecting the abnormal sound of the variable-pitch bearing of the wind generating set according to claim 8, wherein the fault position of the abnormal sound of the variable-pitch bearing is determined by comparing the waveform changes of the vibration signals of the plurality of wireless sensors at the current moment.
10. The method for detecting the abnormal sound of the variable-pitch bearing of the wind generating set according to claim 9, wherein the fault position of the abnormal sound of the variable-pitch bearing is determined according to the sequence of the waveform changes of the vibration signals of the plurality of wireless sensors at the current moment.
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| CN214887492U (en) * | 2021-04-28 | 2021-11-26 | 观为监测技术无锡股份有限公司 | Variable-pitch bearing abnormal sound detection device of wind generating set |
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- 2021-04-28 CN CN202110468526.2A patent/CN113374650A/en active Pending
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| CN102052244A (en) * | 2009-10-29 | 2011-05-11 | 通用电气公司 | Systems and methods for assembling a pitch assembly for use in a wind turbine |
| CN103411659A (en) * | 2013-08-12 | 2013-11-27 | 国电联合动力技术有限公司 | Wind driven generator blade and method and system for monitoring tower barrel states |
| CN205177152U (en) * | 2015-09-07 | 2016-04-20 | 江苏欧讯能源科技有限公司 | Pylon foundation structure monitoring system |
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