JPS61104260A - 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 providing two independent number-of-rotation detection apparatuses and comparing the outputs of both apparatus. CONSTITUTION:A gas turbine engine (drive machinery) 1 drives 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 N1 of rotations detected by a rotary speed detector 4. The number N1 of rotations is inputted to an automatic inspection apparatus 10 through the controller 5 and the number N2 of rotations detected by a reference rotary speed detector 8 is inputted thereto through a number-of- rotation/voltage converter 9. The automatic inspection apparatus 10 compares the number N1 of rotations and the number N2 of rotations and displays abnormality when the difference between both of them is a predetermined value or less. 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. 5 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 speed reducer, and 3 4 is a generator, 4 is a rotation speed detector for the engine 1, 5 is a rotation speed controller for the engine 1, 6 is a fuel valve that controls the amount of fuel co-supplied to the engine 1, and 7 is the engine 1 connected to the rotation speed controller 5. This is a tachometer.

Next, the operation will be described. The rotational speed controller 5 outputs a signal proportional to the rotational speed of the engine 1 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. and controls the rotational speed e of the engine 1. 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 can rotate 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, the engine 1 may not be able to start or detect overspeed, and there is a risk that the engine 1 will rotate beyond its 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 problems of the conventional ones as described above.In addition to detecting the rotation speed in the rotation control system of drive equipment such as an engine, it also detects the rotation speed of the drive equipment independently from the rotation control system. A drive device that detects a reference rotation speed, compares these two rotation speeds, and displays an abnormality display when the comparison error exceeds a set value, automatically notifying an abnormality in the rotation speed detection device at an early stage. The present invention provides an automatic inspection device for a rotation speed detecting device.

[Means for solving problems].

The automatic inspection device for a rotation speed detection device according to the present invention includes a rotation speed detection device that detects the rotation speed in a rotation control system of a drive device, and a reference rotation speed of the drive device independently of the rotation control system. A reference rotation speed detection device, a drive detection device that detects the drive state of the driving equipment, and a comparison error between the rotation speed and the reference rotation speed, and a calculation for processing and calculating whether or not this comparison error is within a set range. It may include a control device and a display device that displays that the comparison error is outside the set range.

[For production]

In this invention, each detection device reads the rotation speed detected by the rotation control system of the drive device and the reference rotation speed of the drive device detected at an independent location during the drive operation of the drive device, After capturing these two rotational speeds into the arithmetic and control unit, a certain width is given to this reference rotational speed, and if the rotational speed of the drive device does not fall within this width, the rotational speed of the drive equipment is changed. When the rotation speed detection device in the control system determines that there is an abnormality, the display device displays the abnormality with light and sound to notify the operator.

〔Example〕

Embodiments of the invention will be described below with reference to the drawings. Second
In the figure, 8 is a reference 0 rotation speed detector provided around the output shaft of the engine 1, like the speed detector 4 which together with the rotation speed controller 5 constitutes the rotation control system of drive equipment such as an engine. The rotation speed detector is independent of the rotation control system.

Reference numeral 9 denotes a rotation speed-voltage converter, and IQ performs various calculations based on the reference rotation value, which is the output of this rotation speed-voltage converter, and the rotation value of the engine 1, which is the output of the rotation speed controller 5, and calculates the rotation speed. This is an automatic inspection circuit that detects abnormalities in a rotation speed detection device including a speed detector 4 and a rotation 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 10 has a configuration shown in FIG. In Fig. 1, 21 is a rotation speed detection device that detects the rotation speed of the engine 1 as a driving device.
, a rotation speed detector 4, a rotation speed controller 5, and the like. A reference rotation speed detector 22 includes a reference rotation speed detector 8 and a rotation speed-to-voltage converter 9 provided around the output shaft of the engine 1. 23 is an operating state detection device 2 as a drive detection device for detecting the operating state of the engine l;
4 is an input device that inputs the detection data of 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; A storage device 26 stores various data such as programs to be executed, input data, and calculation results, and a storage device 26 takes in data from the input device 24 according to the contents of the program stored in the storage device 25 and executes logical judgments and calculations. , an arithmetic control device that outputs the results to the storage device 25 or an output device, and 27 an output device that converts the arithmetic results into a signal that can be output to an external display device 28, auxiliary relay 29, or the like.

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

fa) 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.

Ibl Upon the start of this automatic inspection operation, the arithmetic and control unit 26 reads the rotational speed N and the reference rotational speed NR of the engine 1 from the rotational speed detection device 21 and the reference rotational speed detection device 22 through the input device 24.

[(+) Next, in the arithmetic and control unit 26, two reference rotational speeds N+, which are obtained by adding or subtracting a constant value from the reference rotational speed NH,
N2t- is set, and the rotational speed N of the engine 1 is compared with these reference rotational speeds Nl and N2. Figure 4 shows this N and N
1. It is a rotation speed characteristic diagram showing the relationship with N2.

(dlHere, if the rotation speed N is between the reference rotation speed Nj and N2, it is considered normal; otherwise, it is determined that there is an abnormality such as deterioration of the performance of the rotation speed detection device 21. Determine the presence or absence.

+e) If there is an abnormality, a process is performed to output the details of the abnormality to the outside, and the abnormality is displayed with light or sound on the display device 28, and the inspection process is ended. .

On the other hand, if there is no abnormality, wait for the next data reading cycle, and when the reading cycle comes, repeat the operations from data reading step (b) onwards.

(glOn the other hand, if the next reading cycle has not yet arrived,
It is determined whether the engine 1 is in operation.

(If it is determined in step (g) that the vehicle is not in operation, fc, (1) the arithmetic and control device 26 outputs a signal indicating that the inspection result is normal to the display device 28.

In this way, when the rotational speed of the engine 1 itself as a driving device is out of the set range of the reference rotational speed determined from the reference rotational speed detection device 22, an error message is displayed and the operator is instructed to perform maintenance and inspection of the rotational speed detector. This will allow for exchanges to be made and prevent serious dangers from occurring.

In the above embodiment, an abnormality in the engine is detected by comparing the engine's 10 revolutions per set time with the reference revolution, but it is also possible to detect the engine's abnormality by comparing the engine revolution per set time and the reference revolution. If a device for outputting the engine is installed, data for reviewing the reference rotational speeds Nj and N2 can be obtained.

Furthermore, although the above embodiments have been described with reference to the emergency gas turbine engine generator, the present invention can be applied to detecting an abnormality in the rotation speed detection device 21 in drive equipment including any type of engine. Further, since the rotation speed detection methods of the rotation speed detection device 21 and the reference rotation speed detection device 22 are the same, there is an advantage that comparison of these rotation speed data can be easily performed.

〔Effect of the invention〕

As described above, according to the present invention, in addition to the rotation speed detected by the rotation control system of a drive device such as an engine, a reference rotation speed is detected by a separate reference rotation speed detection device, and the drive is performed based on these two detected data. Since the configuration is configured to detect abnormalities in the rotation detection means of the equipment at the initial stage of driving the driving equipment, fatal accidents such as damage to various parts of the driving equipment or the control unit due to the inability to start the driving equipment or the inability to detect overspeed can be prevented in advance. It has the effect of preventing

[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. FIG. 4 is a rotation speed characteristic diagram showing the relationship between the rotation speed of the driving equipment and the set value of the reference rotation speed, and FIG. 5 is a block connection diagram showing a conventional engine rotation control device. 1 is a driving device, 4 is a rotation speed detector, 8 is a reference rotation speed detector, 10 is an automatic inspection circuit, 21 is a rotation speed detection device, 22
23 is a drive detection device (driving state detection device), 26 is an arithmetic control device, and 28 is a display device. Note that the same reference numerals in the figures indicate the same or equivalent parts. Patent Applicant: Mitsubishi Electric Corporation Figure 1, Figure 4, Figure 5 Procedural Amendment (Voluntary) 1. Display of the incident Special application No. 59-225355 No. 2
, Name of the invention: Automatic inspection device for rotational speed detection device 3, Name of the person making the amendment: (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 5, Subject of the amendment 6, Contents of the amendment (1) Patent in the description The scope of claims is amended as shown in the attached sheet. (2'IIAMfJ♂ is corrected as shown below. The specification is corrected as follows. (3) The reference symbols in Figure 1 are corrected as shown in the attached sheet. List of attached documents (1) Amended patent claims One document stating the range (2) A document stating the amended Figure 1 One or more documents Claims after the amendment (1) Rotation speed that is installed in the rotation control system of the drive equipment to detect the rotation speed a detection device; a reference rotation speed detection device that detects the rotation speed of the drive device independently from the rotation control system;
A drive detection device that detects the driving state of the drive device compares two rotation speeds respectively detected by the rotation speed detection device and the reference rotation speed detection device while the drive device is being driven, and determines whether these rotation speeds are An automatic inspection device for a rotation speed detection device, comprising: an arithmetic control device that calculates whether the rotation speeds are separated by more than a set value; and a display device that displays an abnormality when the two rotation speeds are separated by more than the set value. (2) The rotation speed detection device according to claim 1, characterized in that the two rotation speeds respectively detected by the rotation speed detection device and the reference rotation speed detection device are output and recorded at regular intervals. automatic inspection equipment. Fig. 1 21: Rotation speed Sodo Ibara U22: Standard rotation speed Kogai 223
:、Driving WI extraction device (to I large 4 disasters ■ extraction device) 2G Nijitora calculation example device 28: Display device 29: a'J Calire?

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 reference rotation speed detection device that detects the rotation speed of the drive device independently from the rotation control system;
A drive detection device that detects the driving state of the drive device compares two rotation speeds respectively detected by the rotation speed detection device and the reference rotation speed detection device while the drive device is being driven, and determines whether these rotation speeds are An automatic inspection device for a rotation speed detection device, comprising: an arithmetic control device that calculates whether the rotation speeds are separated by more than a set value; and a display device that displays an abnormality when the two rotation speeds are separated by more than the set value. (2) The rotation speed detection device according to claim 1, wherein two rotation speeds respectively detected by the rotation speed detection device and the reference rotation speed detection device are compared at regular intervals. Automatic inspection device.