The ENVADA Online monitoring and fault diagnosis system contains the products and services provided by ENVADA and her companion. The aim of the system is to help the client create a safe and comfortable production and live space so as to make the client not worrying the safe problem of their device any longer. This solution is for hydropower industry. How to solve the problem of production safety and fault prediction is introduced hereafter.
This is one of complete sets of guides introducing ENVADA’s solutions for the good of clients and some successful examples through the cooperation between ENVADA and other companies.
1. Hydropower industry present developing trend
More and more people have acknowledged the advantage of hydropower at present. The hydropower station is able to make a great contribution to power production. It is necessary to manage the station scientifically and to improve its efficiency so as to make it operating safely and to avoid stop of unit. Therefore, first we must optimize the station in technique and then make it operating safely, economically and stably without any interference.
The continual safe operation of unit is the first task of hydropower industry. To complete this task, the unit must always be in a good condition. The unexpected accident, tear and wear rate and life prediction of unit should be understood in advance. Therefore, the company should be able to predict various conditions that the unit may produce so as to take suitable measures in advance to ensure continual safe operation of unit.
2. Solving your problem is our aim
To complete continual safe operation of unit, the unit must always be in a good condition. Therefore, the forward real-time online monitoring is required so as to make the operator understand possible condition and time of occurrence of fault through variety of operation parameters of unit before the fault occurs. Because the random fault occurs abruptly, it would produce the largest damage and cause the hardest loss so how to avoid the occurrence of random fault of unit should be firstly considered. The technique of automatic online monitoring mode is advanced in comparison with online measuring and offline analysis monitoring mode as well as periodic monitoring mode so it can prevent the occurrence of abrupt fault of unit and no special expert is needed to operate in the site. To predict the fault of unit, which has much to do with time, and to change the maintenance mode of unit are mainly take into attention here. The technique develops on the basic of state monitoring and fault analysis and is a key to complete that advanced predict maintenance substitutes preventative maintenance based on time.
The vibration signal is the most widely used signal among many signals reflecting the states of unit. Because vibration is often a main cause of fault of unit, the signal of vibration commonly reflects variety of fault of unit. It contains variety of rich messages. Measuring vibration of unit is convenient and generally without any effect on normal operation of unit. The necessity and meanings installing rotating machinery vibration monitoring and fault diagnosis system are as follows：
1． The data record and signal analysis are able to provide powerful evidence for accident analysis after the accident occurs so as to save time judging the fault and to decrease the loss caused by stop of unit.
2． The occurrences of many faults have a developing procedure from light to hard. The trend analysis and the measurement of abnormal signal are able to find the potential fault of unit early so as to take measures in advance, to avoid or decrease the occurrence of accident, to extend the life of unit and to improve usable time of unit.
3． By analyzing the state of unit is able to determine the best suitable time of maintenance and the project of maintenance, to prompt the transformation of maintenance mode from accident maintenance mode and periodic maintenance mode to condition maintenance mode, to avoid unnecessary stop of unit, to speed up the maintenance to decrease the time of stop of unit and to save the cost of maintenance.
4． The application of fault diagnosis expert system is able to solve the problem of lack of expert in the site, to make best of rich experience of the expert in vibration monitoring domain so as to improve the level of fault diagnosis and to produce great social and economical benefits.
5． The vibration measuring technology is an essential tool for dynamic balance of rotator in the site.
Online monitoring technology is able to monitor and analyze the state of machinery. By monitoring and analyzing the state of fault of unit and the development of fault in real time is not only able to understand the fault and the fault extent of unit at any time but also to predict what time the fault of unit would reach a danger extent and the unit should be stopped for maintenance so as to apply advanced predict maintenance, which is used to substitute the traditional preventative maintenance based on time, to the unit and to provide scientific guarantee for safe operation of unit.
3. EN8000 feature and advantage---Our product ensures safety of your device
The EN8000 large-scale rotating machinery vibration monitoring and fault diagnosis expert system made in ENVADA is designed and produced to meet above demands. It is able to provide continual protection for your unit.
4. EN8000 system main feature
⑴A data acquisition box adopts a module construction and has good reliability and easy of installation, maintenance and substitution.
⑵The system adopts industrial configuration mode and can online edit the data measured and the expression form of the data.
⑶The system has many vibration analysis methods available suitable for gear and rolling bearing, e.g. Filter analysis, reverse spectrum analysis, envelop analysis, detailed spectrum analysis, wavelet transformation etc.
⑷The fault diagnosis expert system has many functions, e.g. Acquiring sign, automatic diagnosis, dialogue diagnosis, storage of diagnosis result etc.
⑸The system adopts Windows Operating System so the user interface is very friendly and the operation is very convenient.
5. EN8000 system installation
The EN8000 vibration monitoring and fault diagnosis system of water turbine generator unit is composed of the intelligent high-speed data acquisition box, engineer station, vibration analysis and fault diagnosis software etc. The engineer station (upper computer) is used to analyze vibration and to diagnose the fault. The connection between the upper computer and the lower computer adopts communication mode.
The intelligent high-speed data acquisition box adopts a module construction. The 2#, 3# and 4# units have an intelligent high-speed data acquisition box; the 5# and 6# units have another. Two boxes are placed in an industrial case, its size is 2200X800X600mm and its color is gray, and are equipped with a 15″ LCD and a keyboard.
An engineer station (including a printer) is equipped for 5 units. The engineer station may be placed in an engineer office of main control room or other places and is composed of an industrial control computer of P4 2G, a 17″CRT, an A4 color laser printer and software.
The original vibration signals of unit can be introduced into the data acquisition box of EN8000 system from board at the back of Schenck VC4000 system. The new signal of rotating speed/key-phase of each unit can be directly introduced into the data acquisition box of EN8000 system. The signals of water-head, load and flow come from the transducer can be directly introduced into the data acquisition box of EN8000 system.
Cooperating with ENVADA for safety of your device
The problem of continual safe operation of unit is not solely a technical problem. ENVADA Beijing is the best company in the domain of vibration monitoring and fault diagnosis. She has many experienced experts and her developing section has rich experience accumulated in a long period at your service. If your company has been afflicting with the problem of continual safe operation of unit and periodic maintenance, cooperating with ENVADA would be your best choice.
