JPS6198927A - Automatic inspector for gas turbine generator - Google Patents

Abstract

PURPOSE:To continue monitoring under abnormal operation of cooling unit by detecting the abnormality of lubricant cooler in gas turbine generator through comparison between the inlet/outlet temperature of lubricant to be fed to the bearing and a referential level. CONSTITUTION:A gas turbine 1 to be coupled coaxially, inlet temperature thetaI detector 9 of lubricant to be fed to the bearings of reduction gear 2 and generator 3 and outlet temperature thetaO detector 10 of lubricant discharged from the bearing are provided. The outputs from said detectors 9, 10 are fed together with the signals from gas turbine output KW detector 11, room temperature thetaA detector 12 and a gas turbine operating condition contact signal 13 to an operational controller 16 through an input unit 14. Said controller 16 will operate the degree (alpha) (=thetaI-thetaA/thetaO-thetaI) of performance degradation under abnormality and compare with the degree (alphan) under normal condition, and if alpha>alphan, it is decided that the lubricant cooler 5 is abnormal. Said degree (alpha) is set while being corrected by gas turbine output KW.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic inspection device for a gas turbine power generator that detects a cooler or higher temperature when a gas turbine (hereinafter abbreviated as GT) is cooled by lubricating oil. be.

[Conventional technology]

Conventionally, no examples of this type of device have been found, and automatic inspection to directly and quantitatively grasp the deterioration in the performance of the cooler as in the present invention has not been carried out.

[Problem that the invention seeks to solve]

Previously, there was no way to quantitatively detect abnormalities in the lubricating oil cooler, so if the cooler fins were dirty or the performance of the cooling fan, ventilation fan, etc. deteriorated, this could cause a decline in the cooler's performance. As a result, the temperature of the lubricating oil supplied to each bearing of the gas turbine generator increases. As a result, the temperature of the bearing increases, which has a negative effect on the performance of the bearing, and also causes the bearing protection device to malfunction.

This invention was made to solve this problem, and the generator is based on the inlet and outlet temperatures of the lubricating oil supplied to the bearings of each part of the gas turbine generator, or the indoor temperature and gas turbine output. By calculating and comparing the actual performance of the operating cooler with the theoretically obtained performance at positive voltage, we can immediately catch any abnormality in the lubricating oil cooler and prevent it from occurring in the gas turbine before an accident occurs. It is an object of the present invention to provide an automatic inspection device for a gas turbine power generation device that can predict abnormalities in the lubricating oil cooler of the power generation device.

[Failure to solve the problem]

The automatic inspection device for a gas turbine power generator according to the present invention includes an inlet temperature detector and an outlet temperature detector for lubricating oil supplied to each bearing of the gas turbine power generator, a gas turbine output detector, an indoor temperature detector, etc. The automatic inspection results of each lubricating oil cooler of the gas turbine power generator are calculated by applying the detected data and the contact signal of the gas turbine operating state to the input device as input signals, and comparing and calculating the normal values with the storage device and the calculation device. is output to the outside via an output device to operate an auxiliary relay, display device, etc.

[Effect]

In this invention, the input and output temperatures of the lubricating oil supplied to each bearing part of the gas turbine generator during normal operation are measured in advance and stored in the storage device as data to be compared.
- Monitoring of lubricating oil cooler abnormalities during operation is carried out continuously;
Moreover, by providing upper and lower judgment limits to the stored data, the judgment criteria for abnormality can be arbitrarily set.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a gunshot diagram of the lubricating oil supply system of a gas turbine power generator. In the figure, 1 is a gas turbine, and 2 is a speed reducer that reduces the rotation of the gas turbine 1 and transmits power to the generator 3. , 4 is an output shaft that mechanically connects the gas turbine 1° reducer 22 transmitter 3, 5 is a lubricating oil cooler,
6 is a lubricating oil tank, 7 is a lubricating oil pipe, 8 is a cooling fan for a lubricating oil cooler, 9 is a lubricating oil inlet temperature to the bearing (θ■) detector, 10 is a τOka oil outlet temperature from the bearing (eo) Detector,
11 is a gas turbine output (seat) detector, and 12 is an indoor temperature (θA) detector. In addition, Fig. 2 shows the configuration of the automatic inspection device, in which 13 is a gas turbine operating state contact signal, 14 is an input device, and 15 is a program and input for executing the logical judgments and calculations shown in Fig. 3. data.

A storage device 16 for storing data such as calculation results takes in data from the input device 14 according to a program built in the storage device 15, executes logical judgments and calculations, and stores the results in the storage device 15 or output. An arithmetic and control device that outputs to the device 1T, 1T is a signal capable of outputting the inspection result of the gas turbine generator lubricating oil cooler abnormality determined by the arithmetic and control device 16 to the external auxiliary relay 18 and display device 19. 18 is an auxiliary relay that operates according to the output contents of the output device 17 and transmits the inspection results to other devices; 19 is a display device for displaying the inspection results according to the output contents of the output device 1γ It is.

Next, the operation will be explained. First, when the fins of the lubricating oil cooler 5 become dirty or the performance of the lubricating oil cooling fan 8 deteriorates, the performance of the lubricating oil cooler 5 deteriorates. The degree of performance decline α during this abnormality is determined by the lubricant inlet temperature (θl) supplied to each bearing, the lubricant outlet temperature (θ0) detected from each bearing θl−θA, and the indoor temperature (θA>detected). Vessel toyoshi, α=e.−
It can be represented by 01. Therefore, this is compared with the degree of performance deterioration αn under normal conditions, and if α>αn, it can be determined that there is an abnormality in the lubricating oil cooler 5. However, the degree of performance deterioration αn during normal operation varies depending on the gas turbine output (KW) detector 11.
) is large, the above αn is small, and when it is small, the degree of performance deterioration αn is large, so αn = −A
-'lli+B is corrected. However, A and B are constants that have different values for each gas turbine generator, and are determined by theory and actual tests.

Figure 3 shows a flowchart of the inspection process of this device.The inspection process is started by GT operation 21, and hereinafter,
This is repeated periodically until the operation ends 27 or an abnormality 25 occurs (YES).

During inspection, various data are periodically measured 22 and each bearing's lubricating oil inlet temperature (θI) detector 9. Lubricating oil outlet temperature (θ0)
Detector 10. Indoor temperature (θA) detector 12. Gas turbine output (cat) detector 11t - Measure and calculate reference value 23
The theoretical value αn of the degree of performance deterioration α is calculated at If 5 is abnormal, it is judged as 4-II, and if α≦αn, it is judged to be normal.

If an abnormality 25 has occurred (YES), the contents of the abnormality are processed at the output 26, an inspection process is performed, and the GT operation is terminated at 2γ.

Although the above embodiment was related to a lubricating oil cooler for a gas turbine power generator, the same effect can be achieved in automatic inspection of abnormalities in lubricating oil coolers of various rotating equipment other than gas turbine power generators. .

〔Effect of the invention〕

As described above, according to the present invention, an abnormality in the lubricating oil cooler of a gas turbine power generation device can be detected based on the inlet and outlet temperatures, indoor temperature, etc. of the lubricating oil supplied to the bearings, and the abnormality can be determined according to the output capacity of the gas turbine. Correction, fT.

The system was designed to check for abnormalities in the lubricating oil cooler by comparing it with the established standard values, which not only makes it possible to perform inspections according to the operating status of the gas turbine, but also improves automation and stable operation of the gas turbine generator. This has the effect of making it possible to

[Brief explanation of drawings]

Figure 1 is from the gas turbine! Equipment lubricating oil supply system diagram,
FIG. 2 is a block diagram of an automatic inspection system for abnormalities in a lubricating oil cooler of a gas turbine power generator according to an embodiment of the present invention, and FIG. 3 is a flowchart of automatic inspection processing. 1 is a gas turbine, 2 is a speed reducer, 3 is a generator, 5 is a lubricating oil cooler, 9 is a lubricating oil inlet temperature (θI) detector, 10 is a lubricating oil output temperature (θ0) detector, 11 is a gas turbine Output (Cold) detector, 12 is indoor temperature (0 person) detector, 13
is a gas turbine operating state contact signal, 14 is an input device, 1
5 is a storage device, 16 is an arithmetic control device, 17 is an output device,
18 is an auxiliary relay, and 19 is a display device.

Claims (3)

[Claims] (1) A lubricating oil outlet and an inlet temperature detector that detect the lubricating oil outlet and inlet temperature supplied to the main bearings of the gas turbine power generator, and a gas turbine output detector that detects the gas turbine output of the gas turbine power generator. an indoor temperature detector for detecting the indoor temperature of the gas turbine power generator, an output signal of the lubricating oil outlet and inlet temperature detector, an output signal of the gas turbine output detector, and an output signal of the indoor temperature detector. , and a gas turbine operation signal as inputs;
an arithmetic and control device that collects input signals to the input device and automatically inspects and determines whether the main bearings of the gas turbine generator are normal or abnormal based on a predetermined arithmetic formula; A storage device that stores comparison data during operation, an output device that outputs the results of the automatic inspection, and an auxiliary relay that outputs whether or not there is an abnormality in the lubricating oil cooler through the lubricating oil temperature output from the output device. , and a display device. (2) The arithmetic formula for determining abnormality in the cooler of the turbine generator in the arithmetic and control unit is Θ_I, the output temperature is Θ_O, and the indoor temperature is Θ_I, which is the lubricating oil inlet temperature supplied to each bearing.
Claim 1, characterized in that when A, Θ_I - Θ_A/Θ_O - Θ_I = α, and the value of the degree of performance decline α is compared and determined between a normal value and an abnormal value. An automatic inspection device for the gas turbine power generator described above. (3) An automatic inspection device for a gas turbine power generation device according to claim 1, characterized in that the bearings to be monitored for the temperature of lubricating oil due to the cooler abnormality are gas turbines, speed reducers, and generators. .