CN111044277A - Fault diagnosis system and method for pump station unit - Google Patents
Fault diagnosis system and method for pump station unit Download PDFInfo
- Publication number
- CN111044277A CN111044277A CN201911401239.9A CN201911401239A CN111044277A CN 111044277 A CN111044277 A CN 111044277A CN 201911401239 A CN201911401239 A CN 201911401239A CN 111044277 A CN111044277 A CN 111044277A
- Authority
- CN
- China
- Prior art keywords
- frequency
- data
- pump station
- station unit
- acquisition device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000003745 diagnosis Methods 0.000 title claims abstract description 58
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 10
- 230000000007 visual effect Effects 0.000 claims abstract description 4
- 238000004458 analytical method Methods 0.000 claims description 34
- 238000005096 rolling process Methods 0.000 claims description 29
- 238000001228 spectrum Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000001133 acceleration Effects 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 9
- 230000003595 spectral effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 241000353097 Molva molva Species 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 241000196252 Ulva Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000000547 structure data Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a fault diagnosis system and method of a pump station unit, which relate to the field of pump station system diagnosis and comprise the pump station unit, an information acquisition device, a local data acquisition device, an upper computer and a cloud end, wherein the pump station unit consists of a plurality of units and is set as a detected target; the information acquisition device consists of a sensor and is used for acquiring and transmitting parameter data of the pump station unit; the local data acquisition device transmits the acquired information to a server through a network, and software analyzes the data to obtain a relevant diagnosis conclusion; the upper computer is used for collecting local data, and performing visual and monitoring; the cloud is used for collecting big data, calculating, analyzing, processing and diagnosing; the information acquisition device is installed on the pump station unit and connected with the local data acquisition device, the local data acquisition device is connected with the upper computer, and the upper computer is connected with the cloud end.
Description
Technical Field
The invention relates to the field of pump stations, in particular to a fault diagnosis system and method for a pump station unit.
Background
According to incomplete statistics, the number of the currently built pumping station projects in China exceeds 46 ten thousand seats, and a large and medium-sized pumping station has 5500 seats, so that more pumping station projects are built with the economic development and the development of the times, key parts of a pumping station unit are very important parts, if the key parts of the unit break down and are damaged, the running state of the unit can be directly influenced, timely effective treatment is not carried out, potential safety hazards and more serious accident loss can be brought, and frequent faults and maintenance can also greatly increase the maintenance cost. For example, when the water pump is subjected to cavitation, the flow area and the water flow direction in the flow passage, particularly in the blade groove, are changed due to the existence of the cavitation bubbles, so that the stability of energy exchange between the impeller and the water flow is damaged, and the loss is increased. When cavitation is enhanced as required, a large amount of bubbles are generated, which causes rapid decrease in flow rate, lift and efficiency, even to a cutoff state, and cavitation occurs, which may damage the flow passage member. The cavitation can cause strong mechanical erosion and electrochemical action, so that the impeller, the inner wall of the pump shell and the guide vane of the water pump can be seriously damaged, even broken.
Patent application publication No. CN107504998A discloses a pump station fault detection device, but the device is not enough for a system, has no cloud, and has no expert data analysis, especially prediction of life.
Disclosure of Invention
The embodiment of the invention provides a fault diagnosis system and method for a pump station unit. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, there is provided a fault diagnosis system for a pump station unit, comprising a pump station unit, an information acquisition device, a local data acquisition device, an upper computer, and a cloud,
pump station unit: the system consists of a plurality of units and is set as a detected target;
an information acquisition device: the system comprises a sensor, a data acquisition unit and a data transmission unit, wherein the sensor is used for acquiring parameter data of a pump station unit and transmitting the parameter data;
local data acquisition device: sending the collected information to a server through a network, and analyzing data by software to obtain a relevant diagnosis conclusion;
an upper computer: collecting local data, and performing visual and monitoring;
cloud: collecting big data, calculating, analyzing, processing and diagnosing;
the information acquisition device is installed on the pump station unit and connected with the local data acquisition device, the local data acquisition device is connected with the upper computer, and the upper computer is connected with the cloud end.
Preferably, the local data acquisition device includes: a local data acquisition device, a switch and a local control system,
local data acquisition device: collecting input signals, converting the collected input signals into digital signals, and performing certain analysis processing;
the switch: a network switch providing an exclusive electrical signal path;
the local control system: the software analyzes the data to obtain a relevant diagnosis conclusion, and finally, the diagnosis can be carried out through a browsing station;
the information acquisition device is connected with the local data acquisition device, the local data acquisition device is connected with the switch and the local control system in sequence, and the local control system is connected with the upper computer.
Preferably, the pump station unit comprises a plurality of sets, and each set is provided with at least one information acquisition device.
Preferably, the information acquisition device is a sensor.
Preferably, the sensor is an acceleration sensor or an underwater acceleration sensor.
Preferably, the device further comprises a liquid crystal display and a power supply, wherein the liquid crystal display: the display and the visualization are carried out when the real-time monitoring, the analysis and the system maintenance are used in the site; power supply: and providing direct current working voltage for the information acquisition device.
According to a second aspect of the embodiment of the present invention, a fault diagnosis method for a pump station unit is provided, and according to the fault diagnosis system for a pump station unit, the fault diagnosis method specifically includes the following steps:
s1: acquiring pump station unit information through an information acquisition device installed on a pump station unit, and transmitting the pump station unit information to a local data acquisition device;
s2: the local data acquisition device sends the received information of the pump station unit to the server through a network, and software analyzes the data to obtain a relevant diagnosis conclusion and uploads the diagnosis result to an upper computer;
s3: collecting the diagnosis result in the upper computer, calculating, analyzing, processing and diagnosing, and finally, directly accessing the monitoring system through the browsing station to see the real-time diagnosis result;
s4: and triggering an alarm when the data reaches a preset alarm value, and selecting a corresponding fault treatment measure to solve according to a fault diagnosis analysis result.
Preferably, the information of the pump station unit is obtained through an information obtaining device installed on the pump station unit, and the information comprises unbalance data and/or rigidity data and/or resonance data and/or centering data and/or loosening data and/or coupling wear data and/or rolling bearing damage data and/or air gap unevenness data and/or cavitation data and/or blade friction data and/or gear meshing heavy load data and/or oil film whirl and oscillation of the pump station unit.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and particularly acquiring unbalanced data generated by mass eccentricity when the gravity center of a rotating part of the pump station unit is inconsistent with the rotation center, wherein the method for particularly acquiring the data is as follows:
s101: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the magnitude of the X-direction and Y-direction 1 frequency multiplication vibration amplitude is close to that of the X-direction and Y-direction; there is always 1 times frequency at different speeds; the frequency multiplication of the unit 1 is not in the resonance interval; 1, the frequency doubling amplitude/pass frequency value is more than 70 percent; and if the measuring point is an X-direction (Y-direction) measuring point, searching data of the Y-direction (X-direction) measuring point at the same time, and taking out 1 frequency multiplication amplitude value 1/2< (X/Y < (2).
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, specifically acquiring rigidity data of a support part of the pump station unit, and the support part is in the horizontal direction or the vertical direction, and specifically acquiring the data as follows:
s102: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the difference between the frequency doubling vibration amplitudes in the X direction and the Y direction is larger; there is always 1 times frequency at different speeds; (a) the frequency multiplication of the unit 1 is not in the resonance interval; 1, the frequency doubling amplitude/pass frequency value is more than 70 percent; and searching data of the Y-direction or X-direction measuring point at the same time when the measuring point is an X-direction or Y-direction measuring point, and taking out 1 frequency doubling amplitude, wherein X/Y <1/2 or X/Y > 2.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and the method for specifically acquiring the resonance data of the parts of the pump station unit comprises the following steps:
s103: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the phenomenon of large frequency multiplication of 1 does not exist at other rotating speeds; and configuring a device resonance frequency interval in the background, and setting the device when the device leaves a factory (if the resonance interval is not set, the resonance fault is not judged).
Preferably, two groups of resonance intervals are respectively arranged on the motor, the gear box and the water pump component.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically, data in a connection pair between a rotor and a rotor of the pump station unit are acquired, and the method for specifically acquiring the data is as follows:
s104: the vibration exceeds the standard, 1 frequency doubling component and 2 frequency doubling component in the frequency spectrum account for the dominant component, and 2 frequency doubling amplitude is greater than 1 frequency doubling amplitude; 2 frequency multiplication amplitude>1 multiplied frequency amplitude;
1XF represents the 1-times amplitude and 2XF represents the 2-times amplitude.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring the information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically, the loose structure data of the base, the bedplate and the foundation of the pump station unit machine is acquired, and the method for specifically acquiring the data is as follows:
s105: the vibration exceeds the standard, and frequency components of 0.5 frequency doubling, 1 frequency doubling, 1.5 frequency doubling, 2 frequency doubling, 3 frequency doubling, 4 frequency doubling and 5 frequency doubling exist and are dominant;
preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically, wear data of a coupler of the pump station unit is acquired, and the method for specifically acquiring the data is as follows:
s106: vibration measuring points on two sides of the coupler (such as an XY measuring point at a motor driving end and an XY measuring point at a high speed end of a gear box on two sides of the motor coupler, an XY measuring point at a low speed end of the gear box on two sides of the pump coupler and an XY measuring point at a thrust bearing of the water pump) have the frequency multiplication of 0.5, 1, 1.5, 2, 3, 5 and 7;
preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically acquiring damage data of a rolling bearing of the pump station unit, wherein the specific data acquisition method comprises the following steps:
s107: the fault frequency component and its harmonic component of rolling bearing exist, and the fault frequency calculation formula of rolling bearing
Cage failure frequency:
FTF＝(f/2)[1-(d/D)Cosφ]
rolling element rotation failure frequency:
BSF＝(f/2)(D/d){1-[(d/D)Cosφ]2}
outer loop fault frequency:
BPFO＝(f/2)n[1-(d/D)Cosφ]
inner ring failure frequency:
BPFI＝(f/2)n[1+(d/D)Cosφ]
when the vibration measuring point exceeds the standard, judging whether the fault frequency and harmonic components of the rolling bearing associated with the measuring point exist or not,
failure frequency (k) > 20%; n is the analysis frequency/fault frequency; searching the fault frequency of the bearing and the amplitude of the frequency doubling position of the fault frequency in the frequency spectrum;
in the above, f is the rotation speed of the shaft, D is the diameter of the rolling element, D is the diameter of the rolling bearing, n is the number of rolling elements, and Φ is the radial contact angle.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and the data with uneven air gaps of the pump station unit are specifically acquired by the following method:
s108: the rotor is operated under the power frequency condition, if the air gap is not uniform, unbalanced force can be generated on the rotor, so that 2x power frequency vibration is generated, the amplitude of 100Hz is large and accounts for the main component when the rotor is at the rated rotating speed, and the current rotating speed is the rated rotating speed; 100Hz amplitude/passband > 70%.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and the cavitation data of the pump station unit is specifically acquired by the following method:
s109: random, dither or noise is typically generated, (a) the square of the sum of the square of the amplitudes of the high band is > 70% of the open/pass value.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically acquiring blade friction data of the pump station unit, wherein the specific data acquisition method comprises the following steps:
s110: the gap between the impeller and the static pump shell is not uniform, high amplitude can be generated at the passing frequency of the impeller, and the amplitude/passing frequency value at the passing frequency of the impeller is more than 70%; the impeller pass frequency is the revolution frequency.
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically, gear meshing heavy-load data of the pump station unit is acquired, and the specific data acquisition method comprises the following steps:
s111: the meshing frequency of a gear measuring point is high, and the vibration exceeds the standard; the amplitude/pass frequency value of the gear meshing frequency is more than 70 percent; meshing frequency-to-speed ratio-to-tooth number
Preferably, the information acquisition device installed on the pump station unit is used for acquiring information of the pump station unit and transmitting the information of the pump station unit to the local data acquisition device, and specifically, oil film whirl and oscillation data of the pump station unit are acquired, and the method for specifically acquiring the data comprises the following steps:
s112: for the sliding bearing, the vibration exceeds the standard, and 0.5 frequency doubling and 1 frequency doubling components in the frequency spectrum are dominant;
Preferably, the method for determining frequency doubling specifically comprises the following steps:
s1201: acquiring the rotating speed of the pump station unit through the information acquisition device;
s1202: presetting a frequency conversion coefficient value, an analysis frequency analysis _ freq value and a spectral line number fft _ lines value;
s1203: by the formula: x1len ═ Speed/60 ═ coefficient; mechanism _ freq 1.0/fft lines; and calculating frequency multiplication data.
Preferably, the method for determining the frequency multiplication is determined frequency multiplication data.
Preferably, according to the determined frequency doubling data, the specific method further includes:
S1200：
when X1-X1Leng < (proportionality), the abscissa of the point is taken as tempX1, when the number of Hz corresponding to a frequency doubling is small, the range of a frequency doubling value is between 0.5 frequency doubling and 1.25 frequency doubling coordinates, wherein,
0.5 doubling coordinate tempX1 × 0.5;
1.75 doubling coordinates tempX1 × 1.75;
when 20/analysis _ freq 1.0/fft _ lines < tempX1, taking the maximum Value from 0.5 frequency doubling to 1.75 frequency doubling as RX1 Value;
when the number of Hz corresponding to the first frequency multiplication is large, the value range of the first frequency multiplication is +/-10% of the number of spectral lines;
20/analysis _ freq 1.0/fft lines > tempX1, taking the maximum Value in the region from tempX1 to fft lines 10/100 as RX1 Value;
wherein the content of the first and second substances,
true-one multiplication factor RX1 Value;
rotating speed: obtaining the data through a data acquisition unit;
frequency conversion coefficient: presetting background configuration;
analysis frequency analysis _ freq: presetting background configuration;
number of spectral lines fft _ lines: presetting background configuration;
an initial first frequency multiplication coefficient X1 Leng;
resolution reporting;
a frequency doubled abscissa tempX 1;
x1 waveform data;
X1Leng＝Speed/60*coefficient；
proportion＝analysis_freq*1.0/fft_lines。
the technical scheme provided by the embodiment of the invention has the following beneficial effects:
the invention provides a fault diagnosis system of a pump station unit, which can accurately monitor and forecast the service life of key parts of the pump station unit, and in order to avoid irrecoverable loss, a set of service life forecasting system of the key parts of the pump station unit is developed by combining the pump station unit, and a computer monitoring system carries out calculation and analysis on data of the unit to realize diagnosis and forecast on the service life of the key parts of the pump station unit. And a reasonable maintenance scheme is determined, so that the reliability of the pump station unit can be greatly improved, and the maintenance cost is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of a fault diagnosis system of a pump station assembly according to an exemplary embodiment.
FIG. 2 is a schematic diagram of a fault diagnosis system data transmission of a pump station cluster according to an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating a fault diagnosis method for a pump station unit according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
The invention is further described in the following with reference to the accompanying drawings and example 1:
the fault diagnosis system of the pump station unit shown in fig. 1 comprises the pump station unit, an information acquisition device, a local data acquisition device, an upper computer and a cloud end; the pump station unit consists of a plurality of units and is set as a detected target; the information acquisition device consists of a sensor and is used for acquiring and transmitting parameter data of the pump station unit; the local data acquisition device transmits the acquired information to a server through a network, and software analyzes the data to obtain a relevant diagnosis conclusion; the upper computer is used for collecting local data, and performing visual and monitoring; cloud: collecting big data, calculating, analyzing, processing and diagnosing; the information acquisition device is installed on the pump station unit and connected with the local data acquisition device, the local data acquisition device is connected with the upper computer, and the upper computer is connected with the cloud end.
The local data acquisition device adopts an ONV acquisition unit, has the characteristics of good stability and easy maintenance, adopts a special modular design, and adopts an embedded operating system of a software curing technology to really realize maintenance-free; have been tested in industrial field for a long time. ONV collector is used to sample various input signals (such as rotation speed, vibration, swing degree, pressure pulsation, pressure difference, process quantity, etc.), and convert them into digital signals, and analyze them to a certain extent, and then transmit the data to the state monitoring server, so as to realize accurate measurement of physical quantities of vibration, swing degree, pressure pulsation, vibration, etc. of the machine set, and establish a fault diagnosis and analysis system with comprehensive functions and strong practicability for the machine set, and provide real-time monitoring and alarming in situ, and remote monitoring, alarming, fault analysis and diagnosis, etc.
As shown in fig. 2, according to the above solution, further, the local data acquisition device includes: the local data acquisition device is used for acquiring input signals, converting the acquired input signals into digital signals and carrying out certain analysis processing; the exchanger is a network switch and can provide an exclusive electric signal path; the local control system analyzes and analyzes data through software to obtain a relevant diagnosis conclusion, and finally, the diagnosis can be carried out through a browsing station; the information acquisition device is connected with the local data acquisition device, the local data acquisition device is connected with the switch and the local control system in sequence, and the local control system is connected with the upper computer.
The general switch of above-mentioned scheme can select for use the switch of hesmann series, and it has stronger interference killing feature, impact force is strong, anticorrosion, waterproof dustproof, heat dispersion good job stabilization, advantage such as reliability height, and this switch has the over-utilization in a plurality of projects.
According to the scheme, further, the pump station unit is composed of a plurality of groups of units, and each unit is at least provided with one information acquisition device.
According to the above scheme, further, the information acquisition device is a sensor.
According to the scheme, further, the sensor is an acceleration sensor or an underwater acceleration sensor.
The sensor adopted can be an imported international famous brand, has the advantages of wide frequency response range, high measurement precision, small size, easy installation, strong practicability, quick response and the like, can select a 630M170 series acceleration sensor of American PCB company, has the advantages of antimagnetic performance, convenient installation, quick response, high measurement precision, small size, strong practicability and the like, and is widely applied. The sensor is widely applied to domestic large and medium-sized hydroelectric generating sets, and is also adopted in projects such as a three gorges left bank power station, a three gorges right bank power station, a Raschig tile power station, a bay power station, a Gombe gorge power station, a Chongqing Pengshui power station, a Guangxi rock beach power station, a Guizhou Dongfeng power station, a Zhejiang Uxi river power plant and the like; mountable bits such as: the XY direction of the free end of the motor, the XY direction of the driving end of the motor, the XY direction of the high-speed shaft of the gearbox, the XY direction of the low-speed bearing of the gearbox, the XY direction of the thrust bearing are equipotentials, and the measured and adopted data are frequency spectrum waveforms of speed or acceleration. The 608A11 series acceleration sensor of American PCB company can also be used, and the sensor has cable integration, water resistance, convenient installation, fast response, high measurement precision, small size and practicalityStrong usability and the like. The product is widely applied to the fields of aviation, aerospace, ships, weapons, nuclear industry, petrochemistry, hydraulic power, electric power, light industry, traffic, vehicles and the like, and the product has great reputation in the world. For the first time
The technology (i.e. the sensor built-in charge amplifier) makes the use of the sensor more convenient and better adaptable to the environment. These
The technology has a dominant position in the dynamic testing field nowadays and is widely appreciated by users. The sensor is used in projects such as a Nanjing Jianpu water source project, a normal enteromorpha river running water project, a salt officer hub waterlogging drainage project, a Jiuqu river hub and the like. And (3) installing positions such as XY directions of a water guide bearing and XY directions of a water pump thrust bearing, and measuring and adopting frequency spectrum waveforms of speed or acceleration.
According to the proposal, further, the device also comprises a liquid crystal display and a power supply,
a liquid crystal display: the display and the visualization are carried out when the real-time monitoring, the analysis and the system maintenance are used in the site; a large industrial liquid crystal display can be selected for in-situ real-time monitoring, analysis and system maintenance, and an MCGS (micro computer systems plus gas cooking) brand touch screen is adopted. The display screen has reliable performance and is used in a plurality of projects.
Power supply: the direct-current working voltage is provided for the information acquisition device, the direct-current working voltage can be provided for various sensors by adopting a bright weft switch power supply, and the industrial-grade linear power supply module is adopted by the power supply, so that the power supply can be provided for all types of sensors.
The invention also discloses an embodiment 2 of a fault diagnosis method for a pump station unit, and as shown in fig. 1, the scheme based on the fault diagnosis system for the pump station unit specifically includes the following steps:
s1: acquiring pump station unit information through an information acquisition device installed on a pump station unit, and transmitting the pump station unit information to a local data acquisition device;
s2: the local data acquisition device sends the received information of the pump station unit to the server through a network, and software analyzes the data to obtain a relevant diagnosis conclusion and uploads the diagnosis result to an upper computer;
s3: collecting the diagnosis result in the upper computer, calculating, analyzing, processing and diagnosing, and finally, directly accessing the monitoring system through the browsing station to see the real-time diagnosis result;
s4: and triggering an alarm when the data reaches a preset alarm value, and selecting a corresponding fault treatment measure to solve according to a fault diagnosis analysis result.
According to the scheme, further, the information of the pump station unit is obtained through an information obtaining device installed on the pump station unit, and the information comprises unbalance data and/or rigidity data and/or resonance data and/or centering data and/or loosening data and/or coupling wear data and/or rolling bearing damage data and/or air gap unevenness data and/or cavitation data and/or blade friction data and/or gear meshing heavy load data and/or oil film whirl and oscillation of the pump station unit.
The method comprises the following steps of obtaining information of a pump station unit through an information obtaining device arranged on the pump station unit, transmitting the information of the pump station unit to a local data collecting device, and specifically collecting resonance data of parts of the pump station unit, wherein the method for specifically collecting the data comprises the following steps:
s101: unbalanced data
Imbalance occurs when the center of gravity of the rotating component does not coincide with the center of rotation, i.e., the mass is eccentric. Unbalanced rotors create centrifugal forces that damage the bearings, resulting in reduced bearing life. A displacement of the center of gravity of only a few hundredths of a millimeter may cause a very large impulse. The imbalance causes significant frequency-transfer vibration.
Common manifestations are: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the magnitude of the X-direction and Y-direction 1 frequency multiplication vibration amplitude is close to that of the X-direction and Y-direction; there is always 1 times frequency at different speeds;
the judgment basis is as follows:
the frequency multiplication of the unit 1 is not in the resonance interval;
1, the frequency doubling amplitude/pass frequency value is more than 70 percent;
and if the measuring point is an X-direction (Y-direction) measuring point, searching data of the Y-direction (X-direction) measuring point at the same time, and taking out 1 frequency multiplication amplitude value 1/2< (X/Y < (2).
And (3) fault resolution: and (4) advising to check the balance condition of the equipment, and performing dynamic balance check according to the running condition if a part falls off or the original balance block is lost.
S102: rigidity data
The support member may be not rigid enough, and may be in a horizontal direction or a vertical direction of the apparatus.
Common manifestations are: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the difference between the frequency doubling vibration amplitudes in the X direction and the Y direction is larger; there is always 1 times frequency at different speeds;
the judgment basis is as follows:
the frequency multiplication of the unit 1 is not in the resonance interval;
1, the frequency doubling amplitude/pass frequency value is more than 70 percent;
and if the measuring point is an X-direction (Y-direction) measuring point, searching data of the Y-direction (X-direction) measuring point at the same time, and taking out 1 frequency multiplication amplitude, wherein X/Y <1/2 or X/Y > 2.
And (3) fault resolution: and reinforcing the rotor supporting seat.
S103: resonance data
Resonance is a common problem for rotating machines. Resonance is most easily understood by the strings, which have their inherent mass and stiffness, as well as the machine parts and physical structures, and the tone, which may be at the same frequency as the forces inside the machine, which can produce very large vibrations. Variations in these forces can be of energy such as imbalance, tooth meshing, and the like.
The resonance of a rotating component such as a shaft is often referred to as the critical rotational speed. Resonance exists in all parts of a structure, even in pipelines and cement floors, etc., and it is important to avoid that the machine operates at frequencies that cause resonance.
Most devices have multiple natural frequencies of vibration. The more complex the machine, the more natural vibration frequencies. When the excitation frequency is close to the range of ± 20% of the natural vibration frequency of the equipment, strong resonance is induced, resulting in serious equipment damage.
Common manifestations are: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the phenomenon of large frequency multiplication of 1 does not exist at other rotating speeds;
the judgment basis is as follows:
configuring a device resonance frequency interval in the background, and setting when leaving a factory (if the resonance interval is not set, the resonance fault is not judged);
each part such as motor, gear box, water pump sets up two sets of resonance intervals respectively.
And (3) fault resolution: the rotating speed of the equipment is increased or decreased, and the operation in a resonance region is avoided.
S104: centering data
The connection between the rotor and the rotor is centered beyond the positive range when the device is in operation. Thereby causing a phenomenon that the machine vibrates or the coupling vibrates greatly.
Common manifestations are: the vibration exceeds the standard, 1 frequency doubling component and 2 frequency doubling component in the frequency spectrum account for the dominant component, and 2 frequency doubling amplitude is greater than 1 frequency doubling amplitude;
the judgment basis is as follows:
2 multiplied frequency amplitude > -1 multiplied frequency amplitude;
And (3) fault resolution: the equipment is recommended to be stopped, and the centering condition of the equipment is rechecked and verified.
S105: loosening data
The looseness refers to the structural looseness of a base, a bedplate and a foundation of the machine, or incompact cement grouting and deformation of the structure or the foundation, or is caused by the looseness of fixing bolts of the base of the machine or cracks of a bearing seat.
Common manifestations are: the vibration exceeds the standard, and frequency components of 0.5 frequency doubling, 1 frequency doubling, 1.5 frequency doubling, 2 frequency doubling, 3 frequency doubling, 4 frequency doubling and 5 frequency doubling exist and are dominant;
the judgment basis is as follows:
and (3) fault resolution: 1. and (5) inspecting the equipment foundation, judging whether the fixing bolt is loosened or not, and judging whether the ground has obvious cracks or not.
S106: wear data of coupling
Common manifestations are: vibration measuring points at two sides of the coupler (such as an XY measuring point at a motor driving end and an XY measuring point at a high speed end of a gear box at two sides of the motor coupler, an XY measuring point at a low speed end of the gear box at two sides of the water pump coupler and an XY measuring point at a thrust bearing of the water pump) have frequency multiplication components of 0.5, 1, 1.5, 2, 3, 5 and 7;
the judgment basis is as follows:
the two measuring points on the other side of the coupler also meet the two conditions;
and (3) fault resolution: and (4) checking whether the coupler or the shock pad is abraded, and if so, replacing the coupler shock pad and performing equipment centering again.
S107: rolling bearing failure data
Common manifestations are: there are rolling bearing fault frequency components and their harmonic components;
the failure frequency calculation formula of the rolling bearing is as follows:
cage failure frequency:
FTF＝(f/2)[1-(d/D)Cosφ]
rolling element rotation failure frequency:
BSF＝(f/2)(D/d){1-[(d/D)Cosφ]2}
outer loop fault frequency:
BPFO＝(f/2)n[1-(d/D)Cosφ]
inner ring failure frequency:
BPFI＝(f/2)n[1+(d/D)Cosφ]
a rolling bearing and the fault frequency thereof are configured in the machine set part, and a vibration measuring point is associated; and when the vibration measuring point exceeds the standard, judging whether the fault frequency and harmonic components of the rolling bearing associated with the measuring point exist.
The judgment basis is as follows:
in the above, f is the rotation speed of the shaft, D is the diameter of the rolling elements, D is the diameter of the rolling bearing, n is the number of rolling elements, and Φ is the radial contact angle.
And (3) fault resolution: and (5) replacing the bearing.
S108: air gap data
And when the motor runs under the power frequency condition, if the air gap is not uniform, unbalanced force can be generated on the rotor, so that 2x power frequency vibration is generated.
Common manifestations are: at rated speed, the amplitude of 100Hz is large and accounts for the main component
The judgment basis is as follows:
the current rotating speed is the rated rotating speed;
the 100Hz amplitude/pass frequency value is more than 70 percent;
and (3) fault resolution: the rotor and stator may have uneven air gaps or electrical faults, and it is recommended to inspect the rotor and stator.
S109: cavitation data
Common manifestations are: random, high frequency vibrations or "noise" are typically generated. The high frequency (200- & 1000Hz) region of the spectrum will have a "hump" (excited resonance). Combined with multi-spectral contrast, appear in multiple spectra.
The judgment basis is as follows:
the square root/pass frequency value of the high-frequency band amplitude value square sum is more than 70 percent;
and (3) fault resolution: cavitation is usually caused by insufficient pressure of an inlet pipeline, the pressure of an inlet and an outlet is changed, the water level of a water inlet pool is improved, and the angle of a blade is adjusted.
S110: blade friction data
Common manifestations are: if the gap between the impeller and the stationary pump casing is not uniform, high amplitudes are generated at the impeller pass frequency.
The judgment basis is as follows:
the amplitude/pass frequency value at the pass frequency of the impeller is more than 70%; impeller passing frequency is equal to rotation frequency and blade number
And (3) fault resolution: and adjusting the running angle of the blade.
S111 gear engagement heavy load data
Common manifestations are: the meshing frequency of a gear measuring point is high, and the vibration exceeds the standard;
GM is the gear meshing frequency;
the judgment basis is as follows:
the amplitude/pass frequency value of the gear meshing frequency is more than 70 percent; the meshing frequency is the rotation frequency and the rotation speed is the tooth number;
and (3) fault resolution: checking whether the load of the equipment is abnormal or not;
s112: oil whirl and oscillation
The machine rotor is forced to vibrate under the action of various external forces such as unbalanced centrifugal force, and strong excitation factors can be generated inside a rotor bearing system. Under certain conditions, the rotor supported by the radial sliding bearing generates vortex motion under the action of oil film force during operation, and the vortex motion is called oil film self-excitation vortex motion.
As the rotor speed increases, the frequency of the oil whirl increases, maintaining a nearly constant ratio, i.e., about 0.5. However, when the rotor rotation frequency is about twice the first order critical speed of the rotor, the whirling frequency will remain constant and equal to the first order critical speed of the rotor as the rotor speed increases. At this time, the oil whirl becomes oil oscillation.
Common manifestations are: for the sliding bearing, the vibration exceeds the standard, and 0.5 frequency doubling and 1 frequency doubling components in the frequency spectrum are dominant;
the judgment basis is as follows:
1/2 is 0.5XF/1XF is 2, and XF is frequency doubling.
And (3) fault resolution: the oil temperature is changed, the viscosity of the oil is changed, or the rotating speed of the equipment is reduced, and the operation in an oscillation interval is avoided.
According to the above scheme, further, the method for determining frequency doubling is further included, which specifically comprises the following steps:
s1201: acquiring the rotating speed of the pump station unit through the information acquisition device;
s1202: presetting a frequency conversion coefficient value, an analysis frequency analysis _ freq value and a spectral line number fft _ lines value;
s1203: by the formula: x1len ═ Speed/60 ═ coefficient; mechanism _ freq 1.0/fft lines; and calculating frequency multiplication data.
According to the above scheme, further, the method for determining the frequency multiplication is determined frequency multiplication data.
According to the above scheme, further, according to the determined frequency doubling data, the specific method further includes:
S1200：
when X1-X1Leng < (proportionality), the abscissa of the point is taken as tempX1, when the number of Hz corresponding to a frequency doubling is small, the range of a frequency doubling value is between 0.5 frequency doubling and 1.25 frequency doubling coordinates, wherein,
0.5 doubling coordinate tempX1 × 0.5;
1.75 doubling coordinates tempX1 × 1.75;
when 20/analysis _ freq 1.0/fft _ lines < tempX1, taking the maximum Value from 0.5 frequency doubling to 1.75 frequency doubling as RX1 Value;
when the number of Hz corresponding to the first frequency multiplication is large, the value range of the first frequency multiplication is +/-10% of the number of spectral lines;
20/analysis _ freq 1.0/fft lines > tempX1, taking the maximum Value in the region from tempX1 to fft lines 10/100 as RX1Value, wherein,
true-one multiplication factor RX1 Value;
rotating speed: obtaining the data through a data acquisition unit;
frequency conversion coefficient: presetting background configuration;
analysis frequency analysis _ freq: presetting background configuration;
number of spectral lines fft _ lines: presetting background configuration;
an initial first frequency multiplication coefficient X1 Leng;
resolution reporting;
a frequency doubled abscissa tempX 1;
x1 waveform data;
X1Leng＝Speed/60*coefficient；
proportion＝analysis_freq*1.0/fft_lines。
according to the embodiment, irreparable loss is avoided, and the service life of the key parts of the pump station unit is diagnosed and forecasted by the service life forecasting system of the key parts of the pump station unit through calculating and analyzing data of the unit by the computer monitoring system.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (11)
1. A fault diagnosis system of a pump station unit is characterized by comprising the pump station unit, an information acquisition device, a local data acquisition device, an upper computer and a cloud end,
pump station unit: the system consists of a plurality of units and is set as a detected target;
an information acquisition device: the system comprises a sensor, a data acquisition unit and a data transmission unit, wherein the sensor is used for acquiring parameter data of a pump station unit and transmitting the parameter data;
local data acquisition device: sending the collected information to a server through a network, and analyzing data by software to obtain a relevant diagnosis conclusion;
an upper computer: collecting local data, and performing visual and monitoring;
cloud: collecting big data, calculating, analyzing, processing and diagnosing;
the information acquisition device is installed on the pump station unit and connected with the local data acquisition device, the local data acquisition device is connected with the upper computer, and the upper computer is connected with the cloud end.
2. The pump station unit's fault diagnosis system according to claim 1, wherein the local data acquisition device includes: a local data acquisition device, a switch and a local control system,
local data acquisition device: collecting input signals, converting the collected input signals into digital signals, and performing certain analysis processing;
the switch: a network switch providing an exclusive electrical signal path;
the local control system: the software analyzes the data to obtain a relevant diagnosis conclusion, and finally, the diagnosis can be carried out through a browsing station;
the information acquisition device is connected with the local data acquisition device, the local data acquisition device is connected with the switch and the local control system in sequence, and the local control system is connected with the upper computer.
3. The pump station unit fault diagnosis system according to claim 1, wherein the pump station unit is composed of a plurality of sets, each set is provided with at least one information acquisition device, the information acquisition device is a sensor, and the sensor is an acceleration sensor or an underwater acceleration sensor.
4. A fault diagnosis method for a pump station unit, characterized in that the fault diagnosis system for a pump station unit according to any of the preceding claims 1-3, comprises the following steps:
s1: acquiring pump station unit information through an information acquisition device installed on a pump station unit, and transmitting the pump station unit information to a local data acquisition device;
s2: the local data acquisition device sends the received information of the pump station unit to the server through a network, and software analyzes the data to obtain a relevant diagnosis conclusion and uploads the diagnosis result to an upper computer;
s3: collecting the diagnosis result in the upper computer, calculating, analyzing, processing and diagnosing, and finally, directly accessing the monitoring system through the browsing station to see the real-time diagnosis result;
s4: triggering an alarm when the data reaches a preset alarm value, and carrying out diagnosis and analysis; and selecting a corresponding fault treatment measure to solve according to the fault diagnosis analysis result.
5. The pump station unit fault diagnosis method according to claim 4, wherein the pump station unit information is obtained by an information obtaining device mounted on the pump station unit, and comprises unbalance data and/or rigidity data and/or resonance data and/or centering data and/or looseness data and/or coupling wear data and/or rolling bearing damage data and/or air gap unevenness data and/or cavitation data and/or blade friction data and/or gear meshing heavy load data and/or oil film movement and oscillation data of the pump station unit.
6. The pump station unit fault diagnosis method according to claim 5, wherein the pump station unit information is obtained by an information obtaining device installed on the pump station unit, and is transmitted to a local data acquisition device, and the specific data acquisition method for the pump station unit imbalance data and/or the rigid data and/or the resonance data is as follows:
the method specifically collects the unbalanced data generated by mass eccentricity when the gravity center of a rotating part of the pump station unit is inconsistent with the rotating center, and the method specifically collects the data comprises the following steps:
s101: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the magnitude of the X-direction and Y-direction 1 frequency multiplication vibration amplitude is close to that of the X-direction and Y-direction; there is always 1 times frequency at different speeds; the frequency multiplication of the unit 1 is not in the resonance interval; 1, the frequency doubling amplitude/pass frequency value is more than 70 percent; if the measuring point is an X-direction (Y-direction) measuring point, searching data of the Y-direction (X-direction) measuring point at the same time, and taking out 1 frequency multiplication amplitude value 1/2< (X/Y < (2);
specifically, the method for acquiring the rigidity data of the supporting part of the pump station unit in the horizontal direction or the vertical direction comprises the following steps:
s102: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the difference between the frequency doubling vibration amplitudes in the X direction and the Y direction is larger; there is always 1 times frequency at different speeds; (a) the frequency multiplication of the unit 1 is not in the resonance interval; 1, the frequency doubling amplitude/pass frequency value is more than 70 percent; if the measuring point is an X-direction or Y-direction measuring point, searching data of the Y-direction or X-direction measuring point at the same time, and taking out 1 frequency doubling amplitude, wherein X/Y <1/2 or X/Y > 2;
the resonance data of the pump station unit parts are specifically collected, two groups of resonance intervals are respectively arranged on the motor, the gear box and the water pump parts, and the method for specifically collecting the data is as follows:
s103: the vibration exceeds the standard, and 1 frequency doubling component in the frequency spectrum takes the dominant role; the phenomenon of large frequency multiplication of 1 does not exist at other rotating speeds; and configuring a device resonance frequency interval in the background, setting the device resonance frequency interval when the device leaves a factory, and if the resonance interval is not set, not judging the resonance fault.
7. The pump station unit fault diagnosis method according to claim 5, wherein the pump station unit information is obtained by an information obtaining device installed on the pump station unit, and is transmitted to a local data acquisition device, and the method for specifically centering data and/or loosening data and/or coupling wear data is as follows:
specifically, data in connection alignment between a rotor and a rotor of a pump station unit are collected, and the method for specifically collecting the data comprises the following steps:
s104: the vibration exceeds the standard, 1 frequency doubling component and 2 frequency doubling component in the frequency spectrum account for the dominant component, and 2 frequency doubling amplitude is greater than 1 frequency doubling amplitude; 2 frequency multiplication amplitude>1 multiplied frequency amplitude;
1XF represents 1 frequency multiplication amplitude, and 2XF represents 2 frequency multiplication amplitude;
the method specifically collects the structural looseness data of the base, the bedplate and the foundation of the pump station unit machine, and the method specifically collects the data comprises the following steps:
s105: the vibration exceeds the standard, and frequency components of 0.5 frequency doubling, 1 frequency doubling, 1.5 frequency doubling, 2 frequency doubling, 3 frequency doubling, 4 frequency doubling and 5 frequency doubling exist and are dominant;
the method specifically collects the wear data of the coupler of the pump station unit, and comprises the following steps:
s106: vibration measuring points on two sides of the coupler (such as an XY measuring point at a motor driving end and an XY measuring point at a high speed end of a gear box on two sides of the motor coupler, an XY measuring point at a low speed end of the gear box on two sides of the pump coupler and an XY measuring point at a thrust bearing of the water pump) have the frequency multiplication of 0.5, 1, 1.5, 2, 3, 5 and 7;
8. the pump station unit fault diagnosis method according to claim 5, wherein the pump station unit information is acquired by an information acquisition device installed on the pump station unit, and is transmitted to a local data acquisition device, and the specific method for acquiring rolling bearing damage data and/or air gap unevenness data and/or cavitation data is as follows:
the method specifically acquires the damage data of the rolling bearing of the pump station unit, and specifically comprises the following steps:
s107: the fault frequency component and its harmonic component of rolling bearing exist, and the fault frequency calculation formula of rolling bearing
Cage failure frequency:
FTF＝(f/2)[1-(d/D)Cosφ]
rolling element rotation failure frequency:
BSF＝(f/2)(D/d){1-[(d/D)Cosφ]2}
outer loop fault frequency:
BPFO＝(f/2)n[1-(d/D)Cosφ]
inner ring failure frequency:
BPFI＝(f/2)n[1+(d/D)Cosφ]
when the vibration measuring point exceeds the standard, judging whether the fault frequency and harmonic components of the rolling bearing associated with the measuring point exist or not,
n is the analysis frequency/fault frequency; searching the fault frequency of the bearing and the amplitude of the frequency doubling position of the fault frequency in the frequency spectrum;
in the above, f is the rotation speed of the shaft, D is the diameter of the rolling element, D is the diameter of the rolling bearing, n is the number of the rolling elements, and Φ is the radial contact angle;
specifically, the method for acquiring the air gap unevenness data of the pump station unit comprises the following steps:
s108: the rotor is operated under the power frequency condition, if the air gap is not uniform, unbalanced force can be generated on the rotor, so that 2x power frequency vibration is generated, the amplitude of 100Hz is large and accounts for the main component when the rotor is at the rated rotating speed, and the current rotating speed is the rated rotating speed; 100Hz amplitude/pass frequency value is more than 70 percent;
the method specifically collects cavitation data of the pump station unit, and specifically collects the data as follows:
s109: random, dither or noise is typically generated, (a) the square of the sum of the square of the amplitudes of the high band is > 70% of the open/pass value.
9. The pump station unit fault diagnosis method according to claim 5, wherein the pump station unit information is acquired by an information acquisition device installed on the pump station unit and transmitted to a local data acquisition device, and the method for specifically acquiring blade friction data and/or gear engagement heavy load data and/or oil film whirl and oscillation data is as follows:
the method specifically collects the blade friction data of the pump station unit, and specifically collects the data as follows:
s110: the gap between the impeller and the static pump shell is not uniform, high amplitude can be generated at the passing frequency of the impeller, and the amplitude/passing frequency value at the passing frequency of the impeller is more than 70%; the passing frequency of the impeller is the rotation frequency of the blade number;
the method specifically collects gear meshing heavy-load data of the pump station unit and comprises the following steps:
s111: the meshing frequency of a gear measuring point is high, and the vibration exceeds the standard; the amplitude/pass frequency value of the gear meshing frequency is more than 70 percent; the meshing frequency is the rotation frequency and the rotation speed is the tooth number;
specifically, oil film whirl and oscillation data of a pump station unit are collected, and the method for specifically collecting the data comprises the following steps:
s112: for the sliding bearing, the vibration exceeds the standard, and 0.5 frequency doubling and 1 frequency doubling components in the frequency spectrum are dominant;
1/2<＝0.5XF/1XF<XF is frequency doubling 2.
10. The pump station unit fault diagnosis method according to any of the claims 6-17, characterized by comprising a method of determining a frequency doubling, in particular as follows:
s1201: acquiring the rotating speed of the pump station unit through the information acquisition device;
s1202: presetting a frequency conversion coefficient value, an analysis frequency analysis _ freq value and a spectral line number fft _ lines value;
s1203: by the formula: x1len ═ Speed/60 ═ coefficient; mechanism _ freq 1.0/fft lines; and calculating frequency multiplication data.
11. The pump station unit fault diagnosis method according to claim 18, wherein the method for determining the frequency multiplication is determined frequency multiplication data, and the specific method further comprises:
S1200：
when X1-X1Leng < (proportionality), the abscissa of the point is taken as tempX1, when the number of Hz corresponding to a frequency doubling is small, the range of a frequency doubling value is between 0.5 frequency doubling and 1.25 frequency doubling coordinates, wherein,
0.5 doubling coordinate tempX1 × 0.5;
1.75 doubling coordinates tempX1 × 1.75;
when 20/analysis _ freq 1.0/fft _ lines < tempX1, taking the maximum Value from 0.5 frequency doubling to 1.75 frequency doubling as RX1 Value;
when the number of Hz corresponding to the first frequency multiplication is large, the value range of the first frequency multiplication is +/-10% of the number of spectral lines;
20/analysis _ freq 1.0/fft lines > tempX1, taking the maximum Value in the region from tempX1 to fft lines 10/100 as RX1 Value;
wherein the content of the first and second substances,
true-one multiplication factor RX1 Value;
rotating speed: obtaining the data through a data acquisition unit;
frequency conversion coefficient: presetting background configuration;
analysis frequency analysis _ freq: presetting background configuration;
number of spectral lines fft _ lines: presetting background configuration;
an initial first frequency multiplication coefficient X1 Leng;
resolution reporting;
a frequency doubled abscissa tempX 1;
x1 waveform data;
X1Leng＝Speed/60*coefficient；
proportion＝analysis_freq*1.0/fft_lines。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911401239.9A CN111044277A (en) | 2019-12-31 | 2019-12-31 | Fault diagnosis system and method for pump station unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911401239.9A CN111044277A (en) | 2019-12-31 | 2019-12-31 | Fault diagnosis system and method for pump station unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111044277A true CN111044277A (en) | 2020-04-21 |
Family
ID=70242083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911401239.9A Pending CN111044277A (en) | 2019-12-31 | 2019-12-31 | Fault diagnosis system and method for pump station unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111044277A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879278A (en) * | 2021-01-11 | 2021-06-01 | 苏州欣皓信息技术有限公司 | Pump station unit fault diagnosis method based on noise signal A weighting analysis |
| CN113295412A (en) * | 2021-05-26 | 2021-08-24 | 华能澜沧江水电股份有限公司 | Method for detecting reason of unbalanced stress of guide bearing of vertical water turbine generator set |
| CN113532826A (en) * | 2021-07-08 | 2021-10-22 | 国能南京电力试验研究有限公司 | Condensate pump shafting vibration fault diagnosis method based on multi-parameter analysis |
| CN116935103A (en) * | 2023-07-03 | 2023-10-24 | 鹰普罗斯叶轮（宜兴）有限公司 | Abnormality identification method for aluminum alloy impeller |
-
2019
- 2019-12-31 CN CN201911401239.9A patent/CN111044277A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879278A (en) * | 2021-01-11 | 2021-06-01 | 苏州欣皓信息技术有限公司 | Pump station unit fault diagnosis method based on noise signal A weighting analysis |
| CN113295412A (en) * | 2021-05-26 | 2021-08-24 | 华能澜沧江水电股份有限公司 | Method for detecting reason of unbalanced stress of guide bearing of vertical water turbine generator set |
| CN113295412B (en) * | 2021-05-26 | 2022-10-11 | 华能澜沧江水电股份有限公司 | Method for detecting cause of unbalanced stress of guide bearing of vertical water turbine generator set |
| CN113532826A (en) * | 2021-07-08 | 2021-10-22 | 国能南京电力试验研究有限公司 | Condensate pump shafting vibration fault diagnosis method based on multi-parameter analysis |
| CN116935103A (en) * | 2023-07-03 | 2023-10-24 | 鹰普罗斯叶轮（宜兴）有限公司 | Abnormality identification method for aluminum alloy impeller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111044277A (en) | Fault diagnosis system and method for pump station unit | |
| Egusquiza et al. | Condition monitoring of pump-turbines. New challenges | |
| US7322794B2 (en) | Method and apparatus for condition-based monitoring of wind turbine components | |
| CN109488630B (en) | Centrifugal fan rotor misalignment fault diagnosis method based on harmonic relative index | |
| Yang et al. | Condition monitoring and fault diagnosis of a wind turbine with a synchronous generator using wavelet transforms | |
| CN203798563U (en) | Assembly structure of test system for journal bearing | |
| JP3827896B2 (en) | Rolling bearing diagnostic device | |
| CN114018480A (en) | Real-time diagnosis method for rotor unbalance fault of large-scale rotating machinery | |
| Laws et al. | Periodic and continuous vibration monitoring for preventive/predictive maintenance of rotating machinery | |
| Sopcik et al. | How sensor performance enables condition-based monitoring solutions | |
| Finley et al. | Motor vibration problems: How to diagnose and correct vibration errors | |
| Sinha et al. | Vibration based diagnosis of a centrifugal pump | |
| CN113295412B (en) | Method for detecting cause of unbalanced stress of guide bearing of vertical water turbine generator set | |
| CN211740576U (en) | Fault diagnosis system of pump station unit | |
| CN209892388U (en) | Multifunctional on-line monitoring system for fan | |
| Abdel-Rahman et al. | Diagnosis vibration problems of pumping stations: case studies | |
| CN112729519A (en) | Vibration detection system and method for water turbine set | |
| CN109596247A (en) | A kind of semi-umbrella type pump turbine inclined cutout rotor field spider out-of-balance force method for testing and analyzing | |
| Cory | Overview of condition monitoring methods with emphasis on industrial fans | |
| RU2809309C1 (en) | Method for vibration diagnostics of technical condition of gas pumping unit | |
| CN110185438A (en) | Fault Diagnoses of Oil Pump system and method | |
| CN104019887B (en) | A kind of rotating machinery vibrating Frequencies method for distinguishing | |
| KR101472768B1 (en) | Method for checking of facility status with the number of vibrations of rotary machine | |
| Sinha | Significance of vibration diagnosis of rotating machines during installation and commissioning: A summary of few cases | |
| CN116608014A (en) | Fault early warning system for steam turbine generator set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 1205, Block A, Building 14, No. 99 Fulian Third Road, Baoshan District, Shanghai, 2019 Applicant after: Xinhao Chuangzhan Information Technology Co.,Ltd. Applicant after: ZHONGSHUI HUAIHE PLANNING AND DESIGN RESEARCH CO.,LTD. Address before: Building 36, No. 18 Dongchang Road, Industrial Park, Suzhou City, Jiangsu Province, 215024 Applicant before: Suzhou Xinhao Information Technology Co.,Ltd. Applicant before: ZHONGSHUI HUAIHE PLANNING AND DESIGN RESEARCH CO.,LTD. |