CN212621464U

CN212621464U - Bearing vibration monitoring system of wind generating set and wind generating set

Info

Publication number: CN212621464U
Application number: CN202021881317.8U
Authority: CN
Inventors: 杨磊; 周杰; 张凯; 付哲哲
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-02-26
Anticipated expiration: 2030-08-31

Abstract

The embodiment of the application provides a bearing vibration monitoring system of a wind generating set and the wind generating set. This wind generating set's bearing vibration monitoring system includes: the vibration sensor is arranged in a bearing area of the bearing and used for converting the vibration of the bearing into vibration data of an analog signal; the analog-to-digital converter is in communication connection with the vibration sensor and correspondingly converts the vibration data of the analog signals into the vibration data of the digital signals; the programmable logic controller comprises a receiving interface, a processor and a sending interface; the receiving interface is in communication connection with the analog-to-digital converter and used for receiving vibration data of the digital signal; the processor is used for determining whether the bearing is in fault according to the vibration data of the digital signals; the sending interface is used for sending alarm information when the bearing is determined to be in fault. The embodiment of the application realizes the function of monitoring the running state of the bearing in real time, solves the problem of reduced diagnosis timeliness, and avoids the occurrence of bearing jamming.

Description

Bearing vibration monitoring system of wind generating set and wind generating set

Technical Field

The application relates to the technical field of wind power generation, in particular to a bearing vibration monitoring system of a wind generating set and the wind generating set.

Background

In the prior art, a Condition Monitoring System (CMS) can effectively monitor the bearing running state of a wind turbine generator system, and timely pre-warns the running state of the bearing of a faulty generator set, so that companies can conveniently carry out overall arrangement and win more fault processing time. However, the online vibration monitoring system CMS has the following problems:

firstly, the online vibration monitoring system CMS is high in price, and only a small number of wind generating sets in the wind farm can be installed according to business contract agreement and are not implemented as standard products, so that the running state of the bearings of most wind generating sets cannot be monitored, bearing seizure events occur frequently, and a large amount of financial loss is caused.

Secondly, the online vibration monitoring system CMS has more hardware products, needs manufacturers or background professionals to maintain after equipment failure, and has higher maintenance or repair cost.

Thirdly, due to the influence of the network security of the wind power plant, the wind power plant cannot be connected with an external network, data collected by the wind power plant with the online vibration monitoring system CMS installed cannot be transmitted back in time, and the data is delayed for 2-4 months or even longer, so that the timeliness of background diagnosis is greatly reduced, and the real-time monitoring effect cannot be achieved.

Fourthly, the state diagnosis is carried out manually, and the service cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bearing vibration monitoring system and wind generating set of wind generating set to the shortcoming of current mode for there is unable real-time supervision bearing running state or the higher technical problem of cost in the solution prior art.

In a first aspect, an embodiment of the present application provides a bearing vibration monitoring system for a wind turbine generator system, including:

the vibration sensor is arranged in a bearing area of the bearing and used for converting the vibration of the bearing into vibration data of an analog signal;

the analog-to-digital converter is in communication connection with the vibration sensor and correspondingly converts the vibration data of the analog signals into the vibration data of the digital signals;

the programmable logic controller comprises a receiving interface, a processor and a sending interface; the receiving interface is in communication connection with the analog-to-digital converter and used for receiving vibration data of the digital signal; the processor is used for determining whether the bearing is in fault according to the vibration data of the digital signals; the sending interface is used for sending alarm information when the bearing is determined to be in fault;

and the alarm device is in communication connection with the sending interface and is used for giving an alarm according to the alarm information.

In one possible implementation, the alarm device includes: the system comprises an upper computer, a display device of a wind power plant central control system, a mobile communication terminal of operation and maintenance personnel, or wearable electronic equipment of the operation and maintenance personnel; the wearable electronic device comprises a smart wristband or a smart watch.

And the alarm device is used for displaying the alarm information on the display screen or outputting sound or images representing the alarm information.

In one possible implementation, the processor further includes a data acquisition unit;

and the data acquisition unit is used for acquiring vibration data within first preset time through the receiving interface when a preset trigger condition is met.

In one possible implementation, the predetermined trigger condition includes at least one of:

the rotation speed of the bearing is within a predetermined range, or the fluctuation of the rotation speed of the bearing in a second predetermined time is less than a predetermined value.

In one possible implementation, a processor includes a data processing unit;

and the data processing unit is used for carrying out fast Fourier transform analysis on the vibration data to obtain an actual amplitude value in at least one preset frequency range, determining whether the bearing fails according to the actual amplitude value in the at least one preset frequency range, and if the bearing fails, sending alarm information through the sending interface.

In one possible implementation manner, the data processing unit is further configured to match an actual amplitude value in at least one predetermined frequency range with a predetermined component amplitude value in at least one predetermined frequency range, determine a fault portion of the bearing, and send alarm information including the fault portion of the bearing through the sending interface; the fault location of the bearing comprises at least one of: bearing inner race, bearing outer race, rolling element, holder.

In a second aspect, an embodiment of the present application further provides a wind turbine generator system, including: a bearing and a bearing vibration monitoring system of a wind turbine generator set as in the first aspect;

the vibration sensor is arranged in the bearing area of the bearing.

In one possible implementation, the bearing has a bearing seat, the bearing seat is located in a bearing area of the bearing;

the vibration sensor is fixedly connected with the bearing seat through adhesive; or the vibration sensor is fixedly connected with the bearing seat through a bolt.

In one possible implementation, the bearing is a main bearing of a generator of a wind turbine generator set.

In one possible implementation, the programmable logic controller is arranged on a platform at the bottom of a tower of the wind generating set.

The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise:

the embodiment of the application sets up the vibration sensor in the bearing area of bearing, can send vibration data for wind generating set's existing Programmable Logic Controller (PLC) through the vibration sensor in real time, carry out analysis processes to the vibration data through the treater of Programmable Logic Controller, when confirming the bearing breaks down, just can send alarm information for alarm device through sending the interface, the function of real-time supervision bearing running state has been realized, the problem that diagnostic timeliness reduces has been solved, avoid the dead incident of bearing card to take place.

The vibration sensor adopted by the embodiment of the application is low in price, and the programmable logic controller of the wind generating set is utilized, so that the alarm device gives an alarm when the bearing breaks down, and the investment of large-batch equipment cost, equipment maintenance cost and diagnostic personnel service cost is avoided.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a bearing vibration monitoring system of a wind turbine generator system according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a bearing vibration monitoring system of another wind generating set provided by the embodiment of the application;

fig. 3 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present application.

Reference numerals:

100-a vibration sensor;

200-an analog-to-digital converter;

300-a programmable logic controller, 310-a receiving interface, 320-a processor, 321-a data acquisition unit, 322-a data processing unit, 330-a memory and 340-a sending interface;

400-alarm device.

500-bearing, 510-bearing housing;

600-a main shaft;

700-tower drum.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.

The embodiment of the present application provides a bearing vibration monitoring system of a wind generating set, and referring to fig. 1 and fig. 3, the bearing vibration monitoring system of the wind generating set includes: vibration sensor 100, programmable logic controller 300, and alarm device 400.

The vibration sensor 100 is disposed in a bearing area of the bearing 500, and converts vibration of the bearing 500 into vibration data of an analog signal. The vibration sensor 100 is disposed in the bearing area of the bearing 500, and can more directly collect abnormal vibration signals of the bearing 500, thereby more accurately reflecting the operating condition of the bearing 500.

The analog-to-digital converter 200 is in communication with the vibration sensor 100, and converts the vibration data of the analog signal into the vibration data of the digital signal correspondingly.

Programmable logic controller 300 includes a receive interface 310, a processor 320, and a transmit interface 340.

The receiving interface 310 is communicatively connected to the analog-to-digital converter 200 for receiving the vibration data of the digital signal.

The processor 320 is used to determine whether the bearing 500 is malfunctioning according to the vibration data of the digital signal.

The transmission interface 340 is used for transmitting alarm information when it is determined that the bearing 500 is out of order.

And the alarm device 400 is in communication connection with the sending interface 340 and is used for giving an alarm according to the alarm information.

The inventor of the application considers that the input of the low-frequency vibration sensor is less, the vibration data of the analog signal is converted into the vibration data of the digital signal by the analog-to-digital converter 200 and is accessed into the programmable logic controller 300, the programmable logic controller 300 is used for replacing an acquisition unit of the existing online vibration monitoring system CMS, the existing programmable logic controller 300 of the wind generating set is utilized for acquiring the vibration data of the position of the bearing 500, the acquired data is stored, when the utilization rate of the programmable logic controller 300 is low, the acquired data is analyzed and identified by a diagnosis model built in the PLC, and early warning or alarming is carried out in real time in a main control system or at a field terminal of the wind generating set, so that the running state of the bearing 500 is monitored in real time and the cost is reduced.

Based on the above analysis, in the embodiment of the present application, the vibration sensor 100 is disposed in the bearing area of the bearing 500, the vibration sensor 100 can send the vibration data to the existing programmable logic controller 300 of the wind turbine generator system in real time, the processor 320 of the programmable logic controller 300 analyzes and processes the vibration data, and when it is determined that the bearing 500 has a fault, the alarm information can be sent to the alarm device 400 through the sending interface 340, so that the function of monitoring the running state of the bearing 500 in real time is realized, the problem of diagnosing the reduction of timeliness is solved, and the occurrence of the bearing 500 jamming event is avoided.

The vibration sensor 100 adopted in the embodiment of the application is low in price, and the programmable logic controller 300 of the wind generating set is utilized to give an alarm through the alarm device 400 when the bearing 500 breaks down, so that the investment of large-batch equipment cost, equipment maintenance cost and diagnostic personnel service cost is avoided.

Optionally, the vibration sensor 100 is a low-frequency sensor, and can collect a low-frequency vibration signal generated when the bearing 500 runs, and the low-frequency sensor is mature and stable in technology and low in cost.

Optionally, the analog-to-digital converter 200 may use a KL3404 module, and the KL3404 module is a reserved module interface of the wind turbine generator system and may be used directly.

Optionally, referring to fig. 1 and 2, the programmable logic controller 300 further includes a memory 330, and the memory 330 is communicatively connected to the receiving interface 310 for storing vibration data to facilitate data analysis by the processor 320.

In practical applications, the programmable logic controller 300 employs a type of programmable memory for storing programs therein, executing user-oriented instructions such as logic operations, sequence control, timing, counting, and arithmetic operations, and controlling various types of machinery or manufacturing processes via digital or analog input/output. The programmable logic controller 300 of the wind generating set is provided with computing power and sampling frequency.

The embodiment of the application utilizes the programmable logic controller 300 to acquire, store and calculate data, and can further directly reduce the equipment cost investment without additionally increasing an acquisition unit, and greatly improve the timeliness of data analysis.

In some embodiments, the alarm device 400 includes: the system comprises an upper computer, a display device of a wind power plant central control system, a mobile communication terminal of operation and maintenance personnel, or wearable electronic equipment of the operation and maintenance personnel; the wearable electronic device comprises a smart wristband or a smart watch.

And the alarm device 400 is used for displaying the alarm information on a display screen or outputting sound or images representing the alarm information. The alarm device 400 can display the name and type of the fault, so that the fault can be conveniently identified by a maintenance worker, and the maintenance worker can check and confirm the running state of the bearing 500.

In practical application, the display devices of the upper computer and the wind power plant central control system can display alarm information through the display screen; and the mobile communication terminal of the operation and maintenance personnel and the wearable electronic equipment of the operation and maintenance personnel output sound or images representing the alarm information.

In practical applications, after the vibration sensor 100 is powered on, the programmable logic controller 300 can control the vibration sensor to continuously collect data. However, since the bearing characteristics are greatly affected by the rotation speed and the calculation capability of the programmable logic controller 300 is limited, a data acquisition and storage triggering condition needs to be set in advance, and the acquired data is stored after the set data acquisition condition is triggered.

Based on the above analysis, in some embodiments, processor 320 includes a data acquisition unit 321.

And the data acquisition unit 321 is in communication connection with both the receiving interface 310 and the memory 330, and is used for acquiring the vibration data within the first predetermined time through the receiving interface 310 when a predetermined trigger condition is met.

In some embodiments, the predetermined trigger condition comprises at least one of:

the rotation speed of the bearing 500 is within a predetermined range, or the fluctuation of the rotation speed of the bearing 500 is less than a predetermined value in a second predetermined time.

According to the embodiment of the application, the operation condition of the wind generating set is limited, high-quality vibration data are generated and stored, and the effectiveness and the accuracy of monitoring the operation condition of the bearing 500 can be improved.

In practical applications, the predetermined triggering condition may be set in advance, and the predetermined triggering condition is triggered when a predetermined operating condition is met, and is set according to the operating condition of the bearing 500. For example, the rotational speed of the bearing 500 is within a predetermined range, which may include at least one of: the rotating speed of the bearing 500 is between 10 and 12 revolutions per second, and the rotating speed of the bearing 500 is more than 12 revolutions per second. The fluctuation of the rotation speed of the bearing 500 in the second predetermined time is less than a predetermined value, which may include: the fluctuation was less than 0.15 rpm/sec in 20 seconds.

In some embodiments, processor 320 includes a data processing unit 322.

And the data processing unit 322 is configured to perform fast fourier transform analysis on the vibration data to obtain an actual amplitude value in at least one predetermined frequency range, determine whether the bearing 500 fails according to the actual amplitude value in the at least one predetermined frequency range, and send alarm information through the sending interface 340 if the bearing 500 fails.

In practical applications, Fast Fourier Transform (FFT) is a common analysis method, which can transform a signal into a frequency domain and then obtain corresponding information. After the vibration data of the embodiment of the application is subjected to fast fourier transform analysis, the abscissa which is the frequency and the ordinate which is the acceleration value corresponding to the rotating speed can be obtained. Then, from the image formed after the fast fourier transform analysis, a maximum acceleration in a predetermined frequency range, i.e., the actual amplitude of the embodiment of the present application, can be easily obtained. The frequency is divided into at least two predetermined frequency ranges, each predetermined frequency range has an amplitude, and the at least two predetermined frequency ranges correspond to at least two actual amplitudes.

Optionally, the programmable logic controller 300 may include an acceleration module for calculating acceleration of the vibration data.

Optionally, when the difference between the actual amplitude in the predetermined frequency range and the preset amplitude in the predetermined frequency range is within the predetermined range, it is determined that the actual amplitude in the predetermined frequency range matches the preset amplitude in the predetermined frequency range.

Specifically, the preset amplitude value in the predetermined frequency range may be preset by the user through the display interface of the programmable logic controller 300 according to the practice information, and the difference between the actual amplitude value in the predetermined frequency range and the preset amplitude value in the predetermined frequency range may also be preset by the user through the display interface of the programmable logic controller 300 according to the practice information.

Optionally, the actual amplitudes in the predetermined frequency range are correspondingly matched with the preset amplitudes in the predetermined frequency range one by one, and when the matching number reaches the preset number, it is determined that the bearing 500 has a fault. The preset number is also preset by the user through the display interface of the programmable logic controller 300 according to the practice information.

Alternatively, when the matching number does not reach the preset number, it is determined that the bearing 500 is not failed.

For example, the predetermined frequency range includes: 0-5Hz, 5-10Hz, 10-15Hz, 15-20 Hz. Obtaining four actual amplitudes in a predetermined frequency range after fast fourier transform, determining that the bearing 500 has a fault when the difference between the actual amplitude of each predetermined frequency range and a preset amplitude in the predetermined frequency range is in the predetermined range and the number of the actual amplitudes matched with the preset amplitudes is not less than a preset number, for example, not less than two, and sending alarm information.

In some embodiments, the data processing unit 322 is further configured to match the actual amplitude in the at least one predetermined frequency range with the predetermined component amplitude in the at least one predetermined frequency range, determine a fault location of the bearing 500, and send an alarm message including the fault location of the bearing 500 through the sending interface 340; the failure site of the bearing 500 includes at least one of: bearing inner race, bearing outer race, rolling element, holder.

Alternatively, the failure location of the bearing 500 may be any one of a bearing inner ring, a bearing outer ring, a rolling element, and a retainer, or a combination of two or more of the bearing inner ring, the bearing outer ring, the rolling element, and the retainer, and the failure locations of the bearing 500 are obtained by corresponding predetermined component amplitudes in different cases of component failure.

Optionally, the bearing 500 comprises: bearing inner race, bearing outer race, rolling element, holder. The rolling body is arranged between the bearing inner ring and the bearing outer ring, and the retainer is fixed between the bearing inner ring and the bearing outer ring.

Alternatively, the amplitude of the failure site of each bearing 500 is preset, i.e. the amplitude of the predetermined component within the predetermined frequency range is known, the predetermined component being a bearing inner ring, a bearing outer ring, a rolling element or a cage.

As an example, four predetermined frequency ranges are selected, corresponding to four actual amplitudes, and four predetermined component amplitudes for each fault location. The four actual amplitudes are sequentially matched with the preset amplitudes (corresponding to the preset component amplitudes) of the bearing inner ring, the bearing outer ring, the rolling body or the retainer, and matched components, namely the fault position of the bearing 500, are determined.

As an example, if the number of the actual amplitude values matching the preset amplitude values is not less than two, it is determined that the bearing 500 is out of order, and alarm information is sent. When the four actual amplitudes match three of the four predetermined amplitudes of the bearing inner race, the faulty portion of the bearing 500 is determined to be the bearing inner race.

Optionally, the data processing unit 322 is further configured to match the actual amplitude in at least one predetermined frequency range with the predetermined component amplitude in the predetermined frequency range of the fault location of the bearing 500 in sequence, so as to obtain the fault location of the bearing 500. The predetermined component amplitude within the predetermined frequency range of the fault location of the bearing 500 is preset by the user through the display interface of the programmable logic controller 300 according to the practical information.

In practical application, as an optional implementation manner, a predetermined trigger condition is set in a main control program of the programmable logic controller 300, vibration data sampling is performed when the trigger condition is met, the memory 330 stores the vibration data, after the storage quantity of the vibration data reaches a set value, the vibration data is subjected to FFT (fast fourier transform) analysis by using the computing power of the programmable logic controller 300 to obtain frequency and amplitude characteristics, the frequency and amplitude characteristics are matched with the amplitude of a predetermined component within a predetermined frequency range, fault identification and judgment are performed, then the judgment result is displayed through a display screen, and finally, a maintainer checks the operation state of the bearing 500 and reports the operation state to a background for processing.

The present application also uses the conventional fast fourier transform analysis to process data and then preset the relevant information, which is also the prior art in the field, and those skilled in the art can implement the operation by using the conventional programmable logic controller 300.

Through research, the inventor of the application finds that after the bearing vibration monitoring system of the wind generating set provided by the embodiment of the application is comprehensively applied, the following effects can be achieved:

direct economic effect: after the monitoring system is comprehensively applied, the bearing 500 state can be monitored instead of a CMS (vibration monitoring system) on line, for example, each wind generating set can save nearly 2-3 ten thousand yuan, and for five thousand wind generating sets, more than 1 hundred million yuan can be saved. As the installed capacity of wind turbine generators increases, this benefit continues to increase. In addition, after the innovation is feasible, the innovation can be extended to other machine types, and more benefits can be created.

Indirect economic benefits: at present, the sudden replacement period of the power generation generator set is about 15 days, the preventive replacement period is 1-2 days, and after the scheme is implemented, the problem of jamming can be prevented. The replacement time of each generating set is reduced by 10 times, the loss of generating capacity of each generating set per day is estimated to be 1.5 ten thousand degrees, the loss of generating capacity is estimated to be reduced by 15 ten thousand degrees totally, each dead generating set is converted into 7 ten thousand yuan, and the economic benefit is considerable.

Other benefits are as follows: the monitoring system can be energized and used for recognizing abnormal vibration, an abnormal vibration unit is timely found and field personnel are reminded to handle, and the problems of failure reporting, bracket cracking and the like caused by abnormal vibration are avoided.

Based on the same inventive concept, the embodiment of the present application further provides a wind turbine generator set, as shown in fig. 3, the wind turbine generator set includes: bearing 500 and the bearing vibration monitoring system of wind generating set of the embodiment of this application.

The vibration sensor 100 is disposed at a bearing area of the bearing 500. In operation of the bearing 500, only a part of the rolling elements is loaded, and the region in which the part of the rolling elements is located is referred to as the load bearing region in this application. Specifically, the number of the vibration sensors 100 is one.

In some embodiments, referring to fig. 3, bearing 500 is mounted on a main shaft 600, bearing 500 having a bearing seat 510, bearing seat 510 being located in a bearing area of bearing 500.

The vibration sensor 100 is fixedly connected with the bearing seat 510 through adhesive; alternatively, the vibration sensor 100 and the bearing housing 510 are fixedly connected by bolts.

In some embodiments, referring to fig. 3, the bearing 500 is a main bearing of a generator of a wind turbine generator set.

In some embodiments, referring to FIG. 3, the PLC 300 is mounted on a platform at the bottom of a tower 700 of a wind turbine generator system. The vibration sensor 100 is in communication connection with an analog-to-digital converter 200, the analog-to-digital converter 200 is in communication connection with a programmable logic controller 300, and the analog-to-digital converter 200 is fixed on the programmable logic controller 300.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

(1) according to the embodiment of the application, the vibration sensor 100 is arranged in the bearing area of the bearing 500, the vibration data can be sent to the existing programmable logic controller 300 of the wind generating set in real time through the vibration sensor 100, the vibration data is analyzed and processed through the processor 320 of the programmable logic controller 300, when the bearing 500 is determined to be in fault, the alarm information can be sent to the alarm device 400 through the sending interface 340, the function of monitoring the running state of the bearing 500 in real time is achieved, the problem of reduction of diagnosis timeliness is solved, and the occurrence of the bearing 500 blocking event is avoided.

(2) The vibration sensor 100 adopted in the embodiment of the application is low in price, and the programmable logic controller 300 of the wind generating set is utilized to give an alarm through the alarm device 400 when the bearing 500 breaks down, so that the investment of large-batch equipment cost, equipment maintenance cost and diagnostic personnel service cost is avoided.

(3) According to the embodiment of the application, the triggering conditions can be set, the operation condition of the wind generating set is limited, high-quality vibration data are generated and stored, and the effectiveness and the accuracy of monitoring the operation condition of the bearing 500 can be improved.

(4) According to the embodiment of the application, the running state of the bearing 500 is monitored in real time, faults occurring in the wind generating set are processed in time, and the running efficiency and the economic benefit of the wind generating set can be improved.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. A wind generating set's bearing vibration monitoring system characterized in that includes:

the programmable logic controller comprises a receiving interface, a processor and a sending interface; the receiving interface is in communication connection with the analog-to-digital converter and is used for receiving vibration data of the digital signal; the processor is used for determining whether the bearing is in fault according to the vibration data of the digital signal; the sending interface is used for sending alarm information when the bearing is determined to be in fault;

2. The system of claim 1, wherein the alarm device comprises: the system comprises an upper computer, a display device of a wind power plant central control system, a mobile communication terminal of operation and maintenance personnel, or wearable electronic equipment of the operation and maintenance personnel; the wearable electronic device comprises a smart wristband or a smart watch;

and the alarm device is used for displaying the alarm information on a display screen or outputting sound or images representing the alarm information.

3. The system of claim 1, wherein the processor further comprises a data acquisition unit;

the data acquisition unit is used for acquiring the vibration data within first preset time through the receiving interface when a preset trigger condition is met.

4. The system of claim 3, wherein the predetermined trigger condition comprises at least one of:

the fluctuation of the rotation speed of the bearing within a predetermined range or within a second predetermined time is smaller than a predetermined value.

5. The system of claim 1, wherein the processor comprises a data processing unit;

the data processing unit is used for carrying out fast Fourier transform analysis on the vibration data to obtain an actual amplitude value in at least one preset frequency range, determining whether the bearing fails according to the actual amplitude value in the at least one preset frequency range, and if the bearing fails, sending alarm information through the sending interface.

6. The system for monitoring vibration of a bearing of a wind generating set according to claim 5, wherein the data processing unit is further configured to match the actual amplitude in the at least one predetermined frequency range with the predetermined component amplitude in the at least one predetermined frequency range, determine a fault location of the bearing, and send an alarm message including the fault location of the bearing through the sending interface; the fault location of the bearing comprises at least one of: bearing inner race, bearing outer race, rolling element, holder.

7. A wind turbine generator set, comprising: bearing and bearing vibration monitoring system of a wind park according to any of claims 1-6;

the vibration sensor is arranged in a bearing area of the bearing.

8. A wind park according to claim 7, wherein the bearing has a bearing seat located at a bearing area of the bearing;

the vibration sensor is fixedly connected with the bearing seat through an adhesive; or, the vibration sensor is fixedly connected with the bearing seat through a bolt.

9. A wind park according to claim 7, wherein the bearing is a main bearing of a generator of the wind park.

10. The wind turbine generator system of claim 7, wherein the programmable logic controller is mounted on a platform at the bottom of a tower of the wind turbine generator system.