Method for detecting fault of lubricating oil cooler of gas turbine
A technology of lubricating oil cooler and detection method, which is applied in special data processing applications, design optimization/simulation, etc., can solve the problems such as failure to use the monitoring information of lubricating oil cooler.
Pending Publication Date: 2022-03-15
中国船舶重工集团公司第七0三研究所
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Problems solved by technology
The failure of the oil cooler is a gradual process. The existing technologies fail to monitor the information changes during the failure of the oil cooler, and the alarm can only be issued after the failure of the oil cooler.
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Embodiment Construction
[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] combine Figure 1-2 , the implementation of the present invention comprises the following steps:
[0020] The model of the temperature change rate of the return oil of the oil cooler under each working condition is established during the normal operation of the unit.
[0021] Select the historical data during normal operation of the gas turbine, calculate the oil return temperature change rate of the oil cooler under different working conditions, and establish a normal oil return temperature change rate curve, including the upper boundary and the control center line.
[0022] 1) The abscissa parameters use gas turbine speed n, gas turbine exhaust temperature T5 or gas turbine power N;
[0023] 2) The calculation of the rate of change of oil return temperature is
[0024] (ΔT 02 -ΔT 01 ) / t
[0025] Among them, t is the calculation cycle; ΔT 01 , ΔT 0...
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The invention aims to provide a fault detection method for a gas turbine lubricating oil cooler, which comprises the following steps of: constructing an oil return temperature change rate model of the gas turbine lubricating oil cooler under different working conditions, the oil return temperature change rate model comprising an upper boundary and a control center line; collecting the oil return temperature of the lubricating oil cooler in the gas turbine operation process, and calculating the inlet and outlet temperature difference and change rate of the lubricating oil cooler; detecting the oil return temperature change rate of the lubricating oil cooler during actual operation of the unit, and marking the state of the lubricating oil cooler as an abnormal state I when the oil return temperature change rate and the marked oil return temperature change rate are greater than a threshold value; detecting the temperature difference between inlet and outlet lubricating oil of the lubricating oil cooler, and marking as an abnormal state II when the temperature difference exceeds a threshold value; and comprehensively evaluating an abnormal state I and an abnormal state II of the lubricating oil cooler, and when the abnormal state I and the abnormal state II occur at the same time, marking that the lubricating oil cooler is abnormal and completing detection. Whether the gas turbine lubricating oil cooler breaks down or not can be detected through the process information.
Description
technical field [0001] The invention relates to a detection method for a gas turbine, in particular to a detection method for a lubricating oil cooler of a gas turbine. Background technique [0002] The lubricating oil system of the gas turbine is used to provide suitable lubricating oil for the gas turbine to meet the needs of the gas turbine for lubrication, cooling and adjustment during normal operation, and to take away the heat from friction and high-temperature parts to maintain the normal operation of the parts Temperature range, improve the service life of parts. The lubricating oil takes heat from the gas turbine, and the lubricating oil cooler is used to cool the lubricating oil. When the lubricating oil cooler fails, it cannot meet the requirements of the unit for the lubricating oil. [0003] In engineering applications, the failure of the lubricating oil at the inlet and outlet of the lubricating oil cooler is generally detected by monitoring the temperature di...
Claims
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 林枫王伟影胡汀孙鹏栾永军李天华
Owner 中国船舶重工集团公司第七0三研究所