Quick warning method for low-frequency vibration unsteady state of steamship electric generating set
A low-frequency vibration, non-steady-state technology, used in measuring devices, instruments, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as low work efficiency and accuracy, and achieve the effect of improving efficiency and accuracy
Inactive Publication Date: 2014-04-02
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The object of the present invention is to propose a fast early warning method for low-frequency vibration instability of a turbo-generator set to solve the problem of low work efficiency and accuracy in the determination process of the existing low-frequency vibration instability of a turbo-generator set
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
[0027] figure 1 It is a flow chart of the rapid warning method for low-frequency vibration instability of a turbo-generator set. Such as figure 1 As shown, a kind of turbo-generator set low-frequency vibration instability fast warning method provided by the present invention includes:
[0028] Step 1: Set the starting time T M = 0 seconds, end time T N = 10 seconds and step length t = 0.1 seconds.
[0029] Step 2: At time T M , to obtain the low-frequency vibration amplitude sequence at this moment Wherein, i is a frequency serial number, i=1, 2,..., l, and l is a set value.
[0030] Obtain the low-frequency vibration amplitude sequence at this moment Specifically include:
[0031] Step 21: Collect the shaft relative vibration signal on the rotor side of the unit, the rotor speed signal and the key phase signal.
[0032] figure 2 It is a schematic diagram of rapid early warning of low-frequency vibration instability of a turbo-generator set. Such as figure 2 As...
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 quick warning method for a low-frequency vibration unsteady state of a steamship electric generating set in the technical field of rotary machine vibration state detection and fault diagnosis. The method comprises steps of setting a starting time, a terminal time and stepping lengths; obtaining low-frequency vibration amplitude sequences at the time of all stepping lengths from the starting time to the terminal time, and obtaining low-frequency vibration amplitude sequences from the starting time to the terminal time; respectively calculating low-frequency vibration amplitude spans under all frequency serial numbers and low-frequency vibration amplitude parameters under all frequency serial numbers; and determining whether low-frequency vibration on one side of a shafting rotor of the steamship electric generating set at the current time is in an unsteady state in accordance with low-frequency vibration amplitude spans under all frequency serial numbers and low-frequency vibration amplitude parameters under all frequency serial numbers. By the aid of the method, whether the rotor low-frequency movement is in the unsteady state is determined automatically, and the efficiency and the accuracy of low-frequency vibration unsteady state real-time warning analytical work of the large steamship electric generating set are improved.
Description
technical field [0001] The invention belongs to the technical field of vibration state monitoring and fault diagnosis of rotating machinery, and in particular relates to a rapid warning method for low-frequency vibration instability of a steam turbine generator set. Background technique [0002] The low-frequency vibration problem of the rotor of a large turbo-generator often affects the safe operation of a large-scale unit. The severe low-frequency vibration of the turbogenerator shaft system can cause dynamic and static friction between the rotor and the seal, bearing bush, blade top and other parts, which will bring great harm to the safety and reliability of the unit. It is necessary to eliminate and avoid the low-frequency vibration instability of the unit shaft system question. Therefore, it is very important to identify the low-frequency vibration instability of large generating sets to ensure the safety of the entire large generating set. [0003] The mechanism of ...
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): G01H17/00
Inventor 宋光雄
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)