SU1651116A1 - Device for measuring power of gas-turbine plant - Google Patents

Abstract

The invention relates to power engineering and mechanical engineering and can be used in the gas industry in the operation of gas turbine installations on main gas pipelines. The aim of the invention is to improve the measurement accuracy. A device for measuring the power of a GTU consists of an optical-mechanical part and an electronic part. Opaque split discs 1 and 2, having one slot, are fixed at the ends of the promval 3. When the power is transmitted by the promval, it twists and the signals from the photodetectors 5 are out of phase. The magnitude of the phase shift is judged on the transmitted power. The cutters 1 and 2 are mounted without dismantling the promval. 2 Il. (L with

Description

about ate

The invention relates to power engineering and mechanical engineering and can be used in the gas industry in the operation of gas turbine installations on main gas pipelines.

The purpose of the invention is to improve the accuracy of the device.

Figure 1 shows the overall functional diagram of the device; Fig 2 shows the time diagrams of pulses at the corresponding points of the circuit.

A device for measuring the power of a gas turbine unit (GTU) consists of an optical-mechanical part and an electronic part. The optomechanical part has two opaque measuring disks 1 and 2 mounted on opposite flanges of the intermediate shaft 3. Each disk has a transparent section in the form of a slot. The slits are the same and are located on the same line parallel to the axis of rotation of the intermediate shaft. At the level of the slits, one side-i of each disk is equipped with energy source 4 (illuminator), on the other side - energy receiver 5 with a slit diaphragm 6 whose width is equal to the width of the slot on measurement disks 1 and 2 and set so that its large axis passes through the axis of rotation of the Intermediate shaft 3 and coincides in direction with the greatest component of the vibration of the GTPO. In this position, the illuminator 4 and the receiver 5, located in the same housing 7, are fixed to each disk on the base 8.

The electronic part has two amplifiers - a former 9 square-wave signals, an RS-flip-flop 10, two circuits 11 and 12, a 13-pulse counter, a crystal oscillator 14 and a frequency divider 15 (a line of T-flip-flops

The device works as follows

When the shaft 3, which transmits power to the centrifugal compressor, rotates, the opaque measuring discs 1 and 2 block the light fluxes from the illuminators 4. When the slit in disk 1 and slit on disk 2 coincides with slits of receivers 5, the radiant energy coincides in time. When power is transferred to the centrifugal compressor, shaft 3 experiences an elastic deformation of twisting, the value of which is proportional to the transmitted gear. In this case between the pulse

five

0

five

0

five

0

five

0

five

M a and b, a time interval appears that characterizes the elastic deformation of the shaft twisting 3. The time interval value is measured by the number of pulses of the crystal oscillator 14 (Fig. 1). To do this, electrical signals from each receiver 5 of radiant energy are fed to amplifiers-formers 9, from the outputs of which are fed respectively to the R- and S-inputs of the RS flip-flop 10. Simultaneously from the amplifier-former 9, which gives a pulse relative to which the interval ( first impulse), goes to the line of T-triggers. The T-flip-flop 15 creates the time needed to clear the measurement result. From the output of the RS flip-flop 10, the pulse signal in (FIG. 2) is fed to one of the inputs of the AND 11 circuit. The other input of the AND 11 circuit receives the signal of the crystal oscillator 14. The signal from the circuits 10 and 11 is shown in FIG. 2 (diagrams g and e) This signal is fed to one of the inputs of the AND 12 circuit. The other input receives a signal from the T-flip-flop line 15. This impulse signal has a pulse duration of the corresponding time required to remove and record the measurement result. Pulse counter 13 counts pulses d (Fig. 2) while the pulse from circuit 15 is active. Then counter 13 is zeroed manually. The number of pulses counted by the counter 13 is converted into the magnitude of the shaft deformation and is the initial information for determining the power of the GTU.

Claims (1)

Invention Formula A device for measuring the power of a gas turbine installation, comprising two measuring discs with slots mounted on a shaft, receivers and sources of radiant energy located on opposite sides of both disks, a recorder associated with radiant energy receivers, characterized in that accuracy, the recorder is made in the form of a crystal oscillator, two AND, RS-flip-flop circuits, two driver amplifiers connected to the outputs of radiant energy receivers, a pulse counter and a T-flip-flop ruler associated with its The input with the output of the first amplifier is formatted, and the output with the first input of the second And circuit, the second input of which is connected to the output of the first And circuit, and the output to the input of the pulse counter, while both of the RS flip-flop inputs are connected to the outputs of the corresponding usi16511166 Cast it-shapers, and the output - with the first input of the first circuit And, the second input of which is connected to the output of the quartz oscillator, moreover, one measuring slot is made in the measuring disks. Editor A. Kozoriz Compiled by T. Ishkova Tehred S. Migunova Order 1601 Circulation 362 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Fie.2 Proofreader L. Patay Subscription