Intelligent Monitoring and Diagnosis Method for Operational Status of Boiler Induced Fan in Thermal Power Plant
A power station boiler and intelligent monitoring technology, which is applied in the direction of engine function, mechanical equipment, engine control, etc., can solve the problems affecting the normal production and operation of power plant boilers in thermal power plants, the temperature increase of motor stator coils, and the abnormal vibration of installed fans, etc.
Active Publication Date: 2022-08-09
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Among them, fan rotor imbalance, installation misalignment, and rolling bearing faults cause abnormal vibration of the fan, which in turn leads to an increase in the temperature of the motor stator coil (up to 400°C), an increase in the motor current and load, tripping of the power supply, and outage of the power plant boiler, seriously affecting Normal Production and Operation of Thermal Power Plant Boilers
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] example figure 1 As shown, the intelligent monitoring and diagnosing method for the operation state of the induced draft fan of a boiler in a thermal power plant of the present invention comprises the following steps:
[0045] Step 1. A vibration sensor for outputting vibration signals is arranged on each bearing seat of the motor and the fan, and the process parameters of the rotational speed of the induced draft fan are obtained through the induced draft fan control system;
[0046] Step 2: Collect the original vibration signal Xi output by the vibration sensor, perform spectrum analysis on the original vibration signal Xi, and extract the characteristic signal of abnormal vibration state of the motor;
[0047] The total vibration value A of the original vibration signal is calculated according to formula (1);
[0048]
[0049] Step 3. Establish the vibration classification index caused by the fault of the motor stator; the stator fault will produce strong vibrati...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for intelligently monitoring and diagnosing the running state of a boiler induced draft fan in a thermal power plant. In the method, a vibration sensor for outputting vibration signals is arranged on a bearing seat, and the technological parameters of the rotational speed of the induced draft fan are obtained; the original vibration output by the vibration sensor is collected. Spectrum analysis of the signal Xi is carried out to extract the characteristic signals of the motor; respectively establish the vibration classification index caused by the motor stator fault, extract the electromagnetic vibration fault characteristics caused by the uneven air gap of the motor, establish the electromagnetic vibration classification index caused by the abnormality of the motor rotor bar, Extract the fault characteristics of mechanical vibration caused by the unbalance of the fan rotor, establish the classification index of mechanical vibration caused by the abnormal rolling bearings of the motor and each bearing seat of the fan, and extract the fault characteristics of mechanical vibration caused by poor installation and alignment; and give the fault of the induced draft fan accordingly. Warning. The method monitors the running state of the induced draft fan in real time, discovers various defects of the motor and the fan in time, and ensures the normal operation of the boiler equipment of the power station.
Description
technical field [0001] The invention relates to the technical field of equipment detection and diagnosis, in particular to an intelligent monitoring and diagnosis method for the operation state of a boiler induced draft fan in a thermal power plant. Background technique [0002] The boilers of thermal power plants have complex structures, and there are dust removal and desulfurization equipment for flue gas. The flue gas discharge resistance is relatively large. Therefore, induced draft fans are installed in the flue to remove flue gas. At the same time, the induced draft fans also provide the negative pressure required by the boiler combustion chamber. The working principle of the induced draft fan is to suck out the hot air after combustion from the boiler combustion chamber, causing negative pressure in the boiler furnace. After passing through various heat exchangers, the hot air is finally discharged into the atmosphere through the chimney after dust removal, desulfuriza...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
CPCF04D27/001F05D2270/334F05D2260/80Y02P90/02
Inventor 蔡正国
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE