Device and method for monitoring and controlling security risk of turbine movable blade on line
A technology of safety risk and control device, applied in the field of steam turbine, can solve the problem of online monitoring and control function without the safety risk of steam turbine rotor blades
Active Publication Date: 2011-10-12
SHANGHAI POWER EQUIP RES INST +1
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Problems solved by technology
The existing steam turbine thermal protection system has the online protection function of rotor vibration and axial displacement, but does not have the online monitoring and control function of the safety risk of steam turbine blades
Method used
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Embodiment
[0045] Such as figure 1As shown, the block diagram of the online monitoring and control method for the safety risk of the steam turbine blade of the present invention, the online monitoring and control device for the safety risk of the steam turbine blade of the present invention is composed of a vibration sensor 1, an axial displacement sensor 2, a steam turbine thermal protection system interface, a calculation Composed of server, web server and client browser, the journals on both sides of the high and medium pressure cylinders and the journals on both sides of the low pressure cylinder are respectively equipped with two vibration sensors 1 installed at 45° to the horizontal plane, the adjustment of the high and medium pressure cylinders An axial displacement sensor 2 is installed on the thrust bearing on the gearbox side, the vibration sensor 1 and the axial displacement sensor 2 are connected to the interface of the steam turbine thermal protection system, the interface of...
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The invention provides a device and a method for monitoring and controlling a security risk of a turbine movable blade on line. The method includes: calculating a fault probability FPi of the turbine movable blade; monitoring a turbine rotor vibration signal on line; analyzing a rotor vibration frequency spectrum on line; monitoring an axial direction displacement signal of the turbine rotor on line; calculating a mean time to repair MTTRi of the movable blade; determining a weight coefficient Wi of the movable blade fault result; calculating a risk priority number RPNi of the turbine movable blade; evaluating risk rank of the turbine movable blade; determining a maximum risk priority number RPNmax of the movable blade; and recommending a risk control measure of the turbine movable blade. The invention has the advantages that: the device for monitoring and controlling the security risk of the turbine movable blade on line is provided, so the online computation and control of the security risk of the turbine movable blade is realized.
Description
technical field [0001] The invention relates to an on-line monitoring and control device and method for safety risks of motor blades of a steam turbine, and belongs to the technical field of steam turbines. Background technique [0002] The main function of the moving blades of the steam turbine is to convert the kinetic energy of the steam into mechanical energy, and the moving blades with a reaction degree greater than zero also have the function of converting the heat energy of the steam into kinetic energy. According to statistics, the number of accidents, maintenance time and number of replacement parts of steam turbine moving blades all take the first place in steam turbines, indicating that moving blades are the key components that affect the safe operation of steam turbines. During the operation of the steam turbine, failure modes such as breakage of the moving blade, breakage of the shroud and breakage of the tie bars occur, and the consequences are serious. The sa...
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IPC IPC(8): F01D21/00F01D5/12
Inventor 史进渊邓志成杨宇汪勇张琳
Owner SHANGHAI POWER EQUIP RES INST