Application of sensors in vibration monitoring of rotating equipment
Application of sensors in vibration monitoring of rotating equipment
Rotating machinery is widely used in electric power, petrochemical, metallurgy, manufacturing, aviation and almost all industrial sectors. It is the key equipment in production, which has a great impact on safety production. Due to the influence of many unavoidable factors, all kinds of failures often occur, resulting in the reduction or loss of its intended function, and even serious accidents, It causes casualties and huge economic losses, and has a serious social impact.
Vibration monitoring of rotating machinery can effectively reduce the occurrence of the above situation and ensure the safe and efficient operation of machinery and equipment. Vibration is the main cause of mechanical equipment failure, and different kinds of faults will be reflected in the vibration signal. Through monitoring, analyzing and handling the vibration signal, the vibration signal can be monitored, By mastering these information, problems can be found before serious faults and accidents of rotating machinery, and maintenance and repair can be carried out in advance, which can effectively avoid the occurrence of major accidents.
Significance of implementing vibration monitoring system
At present, "few people on duty, no one on duty" is the inevitable trend of the development of the operation mode in various industries. One of the foundations of this operation mode is to monitor the vibration status of the equipment on line in real time, so that the operation status of the equipment can be understood and mastered in the control room or even at the far end;
Through data recording and signal analysis, it can provide strong evidence for accident analysis after the accident, reduce the time to judge the fault and the loss caused by accident shutdown;
The occurrence of many faults has a development process from light to heavy. Through the trend analysis and abnormal signal detection, it can find the potential failure of equipment early, take preventive measures in time, avoid or reduce the occurrence of accidents, extend the service life and improve the availability of equipment;
Through the condition analysis of the equipment, we can determine the reasonable maintenance time and maintenance scheme, promote the transformation of maintenance mode from accident maintenance and regular maintenance to condition based maintenance and condition based maintenance, avoid unnecessary downtime, and reduce downtime and maintenance cost by improving the repair speed, so as to realize a revolution of maintenance mode;
The application of remote expert fault diagnosis mode can solve the problem of insufficient field experts, make full use of the rich experience of experts in various fields, improve the overall level and response speed of fault diagnosis, and create huge social and economic benefits
Application analysis
1. Equipment condition monitoring and analysis system
This system sets up a field station for each monitoring object (such as generator set, pump, reducer, etc.), and all the field stations are connected with the central station through the network to form a hierarchical distributed structure; The field station is responsible for the collection of field vibration data and other data, and the center station carries out a variety of analysis on these data, such as time domain analysis, frequency domain analysis, variable speed analysis, time-frequency analysis, correlation trend analysis, comparative analysis, wavelet analysis, etc. at the same time, it also provides fault symptom extraction function, fault diagnosis expert system, condition evaluation system and other functions.
Advantages: large amount of information, accurate and comprehensive
Disadvantages: many functions, high cost, model limitations, but also immature
2. On line vibration monitoring system
For many rotating equipment in industrial and mining enterprises, it is not necessary and feasible to use expensive condition monitoring system for condition monitoring. Due to the variety of equipment types and the great difference of fault diagnosis models, there is no unified model that can be compatible with so many equipment, but vibration monitoring is very important for the normal operation of rotating machinery, Therefore, it is necessary to adopt a vibration monitoring system which can not only meet the requirements of field mechanical equipment monitoring, but also realize complete vibration data acquisition and basic analysis functions, and has low cost.
Rotating machinery is widely used in electric power, petrochemical, metallurgy, manufacturing, aviation and almost all industrial sectors. It is the key equipment in production, which has a great impact on safety production. Due to the influence of many unavoidable factors, all kinds of failures often occur, resulting in the reduction or loss of its intended function, and even serious accidents, It causes casualties and huge economic losses, and has a serious social impact.
Vibration monitoring of rotating machinery can effectively reduce the occurrence of the above situation and ensure the safe and efficient operation of machinery and equipment. Vibration is the main cause of mechanical equipment failure, and different kinds of faults will be reflected in the vibration signal. Through monitoring, analyzing and handling the vibration signal, the vibration signal can be monitored, By mastering these information, problems can be found before serious faults and accidents of rotating machinery, and maintenance and repair can be carried out in advance, which can effectively avoid the occurrence of major accidents.
Significance of implementing vibration monitoring system
At present, "few people on duty, no one on duty" is the inevitable trend of the development of the operation mode in various industries. One of the foundations of this operation mode is to monitor the vibration status of the equipment on line in real time, so that the operation status of the equipment can be understood and mastered in the control room or even at the far end;
Through data recording and signal analysis, it can provide strong evidence for accident analysis after the accident, reduce the time to judge the fault and the loss caused by accident shutdown;
The occurrence of many faults has a development process from light to heavy. Through the trend analysis and abnormal signal detection, it can find the potential failure of equipment early, take preventive measures in time, avoid or reduce the occurrence of accidents, extend the service life and improve the availability of equipment;
Through the condition analysis of the equipment, we can determine the reasonable maintenance time and maintenance scheme, promote the transformation of maintenance mode from accident maintenance and regular maintenance to condition based maintenance and condition based maintenance, avoid unnecessary downtime, and reduce downtime and maintenance cost by improving the repair speed, so as to realize a revolution of maintenance mode;
The application of remote expert fault diagnosis mode can solve the problem of insufficient field experts, make full use of the rich experience of experts in various fields, improve the overall level and response speed of fault diagnosis, and create huge social and economic benefits
Application analysis
1. Equipment condition monitoring and analysis system
This system sets up a field station for each monitoring object (such as generator set, pump, reducer, etc.), and all the field stations are connected with the central station through the network to form a hierarchical distributed structure; The field station is responsible for the collection of field vibration data and other data, and the center station carries out a variety of analysis on these data, such as time domain analysis, frequency domain analysis, variable speed analysis, time-frequency analysis, correlation trend analysis, comparative analysis, wavelet analysis, etc. at the same time, it also provides fault symptom extraction function, fault diagnosis expert system, condition evaluation system and other functions.
Advantages: large amount of information, accurate and comprehensive
Disadvantages: many functions, high cost, model limitations, but also immature
2. On line vibration monitoring system
For many rotating equipment in industrial and mining enterprises, it is not necessary and feasible to use expensive condition monitoring system for condition monitoring. Due to the variety of equipment types and the great difference of fault diagnosis models, there is no unified model that can be compatible with so many equipment, but vibration monitoring is very important for the normal operation of rotating machinery, Therefore, it is necessary to adopt a vibration monitoring system which can not only meet the requirements of field mechanical equipment monitoring, but also realize complete vibration data acquisition and basic analysis functions, and has low cost.
Product features
1. Rugged design
2. Corrosion resistance
3. Shell isolation
4. High impact resistance
Model 314A is an industrial IEPE accelerometer permitting vibration measurements. 314A features an annular shear ceramic crystal which exhibits excellent output stability over time. The accelerometer incorporates an internal circuit with in a two-wire IEPE system which transmits its
low impedance voltage output through the same cable that supplies the constant current power. Signal ground is internal shielded and isolated from the outer case of the unit. Polarity inversion protection for the amplify circuit is inherent in the circuit design. The welded stainless-steel
construction provides a hermetic housing. The standard MIL-C-5015 glass insulated connector provides long-term stability over the operating temperature range. In addition to adhesive mounting, 314A has ¼-28 threaded holes for stud mounting on the test object. The 314A provides wide
frequency response and shock resistance, which is ideal for industrial vibration monitoring under incidental shock environment.
1. Rugged design
2. Corrosion resistance
3. Shell isolation
4. High impact resistance
V314 low cost general industry IEPE vibration transducer, accelerometer sensor
V314 V315 low cost general industry IEPE vibration transducer, accelerometer sensor:Model 314A is an industrial IEPE accelerometer permitting vibration measurements. 314A features an annular shear ceramic crystal which exhibits excellent output stability over time. The accelerometer incorporates an internal circuit with in a two-wire IEPE system which transmits its
low impedance voltage output through the same cable that supplies the constant current power. Signal ground is internal shielded and isolated from the outer case of the unit. Polarity inversion protection for the amplify circuit is inherent in the circuit design. The welded stainless-steel
construction provides a hermetic housing. The standard MIL-C-5015 glass insulated connector provides long-term stability over the operating temperature range. In addition to adhesive mounting, 314A has ¼-28 threaded holes for stud mounting on the test object. The 314A provides wide
frequency response and shock resistance, which is ideal for industrial vibration monitoring under incidental shock environment.
