JPS61104259A - Automatic inspection apparatus of number-of-rotation detection apparatus - Google Patents

Abstract

PURPOSE:To inform the abnormality of a number-of-rotation detection apparatus in an early stage, by comparing the output of the number-of-rotation detection apparatus connected to drive machinery with the number of rotations calculated from the output power of the generator driven by the drive machinery. CONSTITUTION:A gas turbine engine (drive machinery) 1 is driven by a generator 3 through a speed reducer 2 and a rotary speed controller 5 controls a fuel valve 6 on the basis of the number N of rotations of the engine 1 detected by a rotary speed detector 4. The number N of rotations is inputted to an automatic inspection apparatus 12 through the controller 5 and the output W of the generator 3 is inputted thereto through a power quantity detection apparatus 22. The automatic inspection apparatus 12 calculates the number of rotations of the engine 1 from output power W and compares the same with the number N of rotations by the detector 4 and displays abnormality when the difference between both of them is a predetermined value or more. By this method, because abnormality can be detected in an early stage, a fatal accident can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic inspection device for a rotation speed detection device, and in particular, the present invention relates to an automatic inspection device for a rotation speed detection device. This relates to something that can quickly tell if the vehicle is falling into a state of overdrive.

[Conventional technology]

FIG. 6 is a block connection diagram showing a conventional rotation control device for drive equipment. In the figure, 1 is a gas turbine engine for driving a generator (hereinafter referred to as engine) as a drive equipment, 2 is a reduction gear, and 3 is a reduction gear. 4 is a rotational speed detector for the engine 1; 5 is a rotational speed controller for the engine 1; 6 is a fuel valve that controls the amount of fuel supplied to the engine 1; 7 is an engine that rotates 10 times connected to the rotational speed controller 5. It is a count.

Next, the operation will be described. The rotational speed controller 5 outputs a signal proportional to the engine rotational speed detected by the rotational speed detector 4 and a contact output at the set engine rotational speed, and controls the fuel valve 6 according to each of these signals. , the rotational speed of the engine 1 is controlled. In controlling such a gas turbine engine, the rotation speed is detected in the entire rotation range from start to stop, and the starter, auxiliary equipment, and fuel valve are sequentially controlled when the rotation speed is higher than a set rotation speed. Also, while a diesel engine rotates at several thousand revolutions per minute, a gas turbine engine rotates at a high speed of 10,000 revolutions per minute. Particularly during startup, precise control of the rotation speed of the engine 1 is required.

[Problem that the invention seeks to solve]

By the way, in order to control the rotation speed of the engine 1, it is necessary to detect the rotation speed of the engine 1 with high precision, and a rotation speed detection device including the rotation speed detector 4 and the rotation speed controller 5 is required. If the engine 1 breaks down or its performance deteriorates, it will become impossible to start the engine 1 or detect overspeed, and there is a risk that the engine 1 will rotate beyond the high-speed operating range, leading to a fatal accident in which the engine 1 is damaged. In other words, there was no guarantee that the rotation control of the engine 1 could always be executed stably.

Recently, gas turbine engines have been increasingly used as emergency generator drive equipment, but since there is little track record, improvements in reliability are desired in order for them to become more widespread. Note that until now, there was no reliable emergency generator drive equipment, and the burden of determining failures in rotation detection devices was forced by visually observing thermometers and rotation speed meters.

This invention was made in order to eliminate the above-mentioned problems with the conventional ones.In addition to detecting the rotation speed of driving equipment such as engines, it also calculates the rotation speed conversion value from the electric power of the generator, and calculates the rotation speed conversion value from the electric power of the generator. A rotation speed detection device for drive equipment that can automatically notify an abnormality in the rotation speed detection device at an early stage by comparing the rotation speed and a rotation speed conversion value and displaying an error message when the comparison error exceeds a set value. The present invention provides an automatic inspection device.

[Means for solving the problem],) The automatic inspection device for a rotation speed detection device according to the present invention includes a rotation speed detection device for detecting the rotation speed of a driving device, and a power amount detection device for detecting the power amount of a generator. A drive detecting device that detects the drive state of the drive device performs a comparison error between the rotation speed and the rotation speed conversion value of the power amount of the generator, and processes and calculates whether or not this comparison error is within a set range. an arithmetic and control unit that
and a display device that displays that the comparison error is outside the set range.

[Effect]

In this invention, each detection device reads the rotation speed of the drive device and the amount of power of the generator during the drive operation of the drive device, and after importing these rotation speed and power amount into the arithmetic and control device. , the rotation speed of the drive device is converted from this power amount, a rotation speed conversion value is obtained in the arithmetic and control unit, and this rotation speed conversion value is given a certain range, and the rotation speed of the drive device is determined within this range. If the rotation speed detection device of the drive equipment does not settle down, it is determined that there is an abnormality, and the display device displays the abnormality with light or sound to notify the operator.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 2, 1.8 is the instrument transformer connected to the generator 3;
9 is a frequency meter for the frequency of the voltage generated by the generator 3; 10 is a current transformer for extracting the amount of electricity from the generator 3; 11 is a power converter; 12 is the rotation speed conversion value that is the output of this power converter 11 and the above-mentioned rotation. This is an automatic inspection circuit that performs various calculations based on the engine 10 rotation value output from the speed controller 5.

Components that are the same as those shown in FIG. 5 are designated by the same reference numerals, and redundant explanation thereof will be omitted.

Further, the automatic inspection circuit 12 has a configuration shown in FIG. In FIG. 1, 21 is a rotation speed detection device for detecting the rotation speed of the engine 1 as a driving device,
It is equipped with a rotation speed detector 4, a rotation speed controller 5, and the like. 22 is a power amount detection device that detects the power amount of the generator, and includes a power converter 11 and the like. Reference numeral 23 denotes an operating state detection device as a drive detection device for detecting the operating state of the engine 1, and 24 receives detection data from each of the detection devices 21, 22, and 23 into an arithmetic control device and converts it into a signal that can be subjected to logical judgment and arithmetic processing. 25 is a storage device for storing various data such as calculation results, and 26 is a storage device for storing various data such as calculation results. An arithmetic control device 27 takes in data from the input device 24 according to the contents of a built-in program, executes logical judgments and arithmetic operations, and outputs the results to a storage device 25 and an output device. This is an output device that converts the signal into a signal that can be output to the auxiliary relay 29, etc.

Next, the operation will be described. This operation will be explained with reference to the flowchart of the inspection process shown in FIG.

(Al First, when the engine 1 starts operating and enters the operating state, an automatic inspection operation is started by the output of the operating state detection device 23.

(bl) By starting this automatic inspection operation, the arithmetic and control device 26 reads the engine 10 rotation speed N and the electric power amount of the generator 3 from the rotation speed detection device 21 and the electric power amount detection device 22 through the input device 24.

(C1 Next, the arithmetic and control unit 26 multiplies the electric energy W by a correction coefficient R to calculate a rotational speed conversion value NR.

In this case, the relationship between the electric energy W and the rotational speed N is the fifth
As shown in the figure, 100% at 10.0% load
The rotation speed will be 10, but due to the drooping characteristics when there is no load.
The rotation speed is 3%, and the above correction coefficient R is selected in consideration of this relationship.

Furthermore, two set rotation speed conversion values Nl and N2 are set by adding and subtracting a fixed value to this rotation speed conversion value NR, and the engine 10 rotation speed N and these set rotation speed conversion values Nl and N are set.
Compare with 2. Figure 4 shows this N and Nl.

It is a rotation speed characteristic diagram showing the relationship with N2.

(d) Here, the rotation speed N is the rotation speed conversion value N1 * N2
If there is a difference, it is normal, and if there is not, it is determined that there is an abnormality such as deterioration in the performance of the rotation speed detection device 21. In other words, the presence or absence of an abnormality is determined.

If there is an abnormality, the contents of the abnormality are output to the outside, the abnormality is displayed on the display device 28 with light or sound, and the inspection process is ended. 1)(f)
On the other hand, if the abnormality disappears, wait for the next data reading cycle, and when the reading cycle comes, repeat the operations from step b of data reading.
It is determined whether the engine 1 is in operation.

(h) If it is determined in step (g) that the vehicle is not in operation, the arithmetic and control device 26 outputs a signal to the display device 28 indicating that the inspection result is normal.

In this way, when the rotation speed of the engine 1 itself as a driving device is out of the setting range of the rotation speed conversion value obtained from the electric energy of the generator 3, an abnormality is displayed and the operator is instructed to perform maintenance on the rotation speed detector. Inspection or replacement can be carried out to prevent serious danger from occurring.

In the above embodiment, an abnormality in the engine is detected by comparing the rotation speed of the engine 1 per set time with the rotation speed conversion value of the electric power of the generator. If a device is installed to type out the number and the rotational speed conversion value of the power amount of the generator, it is possible to obtain data for reviewing the set rotational speed conversion values Nl and N2.

Further, although the above embodiment has been described with respect to an emergency gas turbine engine generator, the present invention can be applied to detecting an abnormality in a rotation speed detection device in a driving device including any engine.

〔Effect of the invention〕

As described above, according to the present invention, in addition to the rotational speed of a drive device such as an engine, the power amount of the generator is detected, and from these two detection data, an abnormality in the rotation detection means of the drive device is detected at the initial stage of driving the drive device. Since the configuration is configured such that detection is performed at 5, it is possible to prevent fatal accidents such as damage to various parts of the drive equipment or the control unit due to inability to start the drive equipment or inability to detect overspeed.

[Brief explanation of drawings]

Fig. 1 is a block connection diagram of an automatic inspection circuit according to an embodiment of the present invention, Fig. 2 is a block connection diagram schematically showing the rotation speed inspection device of the invention, and Fig. 3 similarly shows the calculation processing process of the automatic inspection. 4 is a rotation speed characteristic diagram showing the relationship between the rotation speed of the driving equipment and the rotation speed conversion value obtained from the electric energy of the generator. FIG. 5 is a power consumption-rotation speed characteristic diagram. The figure is a close-up block diagram showing a conventional engine rotation control device. 1 is a driving device, 3 is a generator, 21 is a rotation speed detection device, 2
2 is a power amount detection device, 23 is a drive detection device (operating state detection device), 26 is an arithmetic control device, and 28 is a display device. In addition, the same reference numerals in the drawings indicate the same or equivalent parts. Patent applicant: Mitsubishi Electric Co., Ltd. 1 Figure 1, Ru 1 η Yagura 3; Young Woman 3 Do → - ■ Betting 100% → Electricity Procedures Amendment (Voluntary) 15 Indication of Cases Patent Application No. 1987-225354 2,
Name of the invention Automatic inspection device for rotational speed detection device 3, Relationship to the case of the person making the amendment Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Hitoshi Katayama, Representative of Mitsubishi Electric Corporation Part 8 5, Subject of amendment. 6. Contents of amendment (1) The claims of the specification will be amended as shown in the attached sheet. (2) Ming! Book S is amended as follows. The specification is amended as follows. (3) Correct Figure 1 as shown in the attached sheet. (4) Correct Figure 2 as shown in the attached sheet. 7. List of attached documents (1) Document stating the amended scope of claims (1 copy) (2) Document stating Figure 1 after amendment (1 copy) (3)
1 or more documents stating the amended Figure 2 Claims after the amendment (1) A rotation speed detection device installed in a rotation control system of a drive device to detect the rotation speed, and a power amount detection device that detects the power amount of the generator; a drive detection device that detects the driving state of the drive device; and a power amount detection device that detects the power amount of the generator; an arithmetic and control device that compares a rotational speed conversion value and calculates whether the rotational speed deviates from the rotational speed conversion value by more than a set amount; An automatic inspection device for a rotation speed detection device, which is equipped with a display device that indicates an abnormality based on the output.

Claims (2)

[Claims] (1) A rotation speed detection device that is installed in a rotation control system of a drive device and detects the rotation speed, a power amount detection device that detects the amount of power of a generator driven by the drive device, and a drive of the drive device. A drive detection device that detects the state compares the rotation speed with a rotation speed conversion value obtained from the electric energy of the generator while the drive equipment is being driven, and sets the rotation speed conversion value as the rotation speed. An automatic inspection device for a rotation speed detection device, comprising: a calculation control device that calculates whether the rotation speed has deviated by more than the set amount; and a display device that displays an abnormality based on the output of the calculation control device when the rotation speed has deviated by more than the predetermined amount. . (2) The rotation speed detection device according to claim 1, characterized in that the rotation speed of the driving equipment and the rotation speed conversion value obtained from the electric energy of the generator are compared at regular intervals. automatic inspection equipment.