RU2693742C1 - Pressure measurement device with pressure converter modules and method of device operation - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to power engineering and can be used for pressure measurement during testing of gas turbine engines. Essence: pressure transducer module (6) comprises platform (11) with pressure transducer (12) attached thereto, collector (13) with at least two electric control valves (20) and element (14) for attachment of pressure transducer module (6). Pressure transducer (12) is connected to manifold (13), which is made with four inputs for supply of measured pressure and one inlet for pilot air supply. Three of the above measured pressure supply inputs are configured to be connected to the test device, and the fourth input is configured to be connected to the receiver.

EFFECT: increased accuracy of measurements due to possibility of self-diagnostics and calibration of pressure sensors during tests.

14 cl, 6 dwg

Description

The invention relates to power engineering, in particular to devices for testing gas turbine engines, as well as other devices, the testing of which requires pressure measurements with high accuracy.

A known system for controlling the flame in the combustion chamber of a gas turbine engine (US patent 9494493, published on November 15, 2016), contains one acoustic sensor designed to measure acoustic oscillations in the combustion chamber of a gas turbine engine; a processor connected to receive the output signal of the dynamic pressure sensor from a single acoustic sensor; computer-readable media containing computer-readable instructions, during processing of which the processor performs the following operations: receiving the output signal of a dynamic pressure sensor from a single acoustic sensor, the output signal indicating acoustic oscillations inside the combustion chamber; performing an autocorrelation operation on the output signal of the dynamic pressure sensor to identify time-divided signal portions having autocorrelation values; based on the autocorrelation values, by determining whether the parts of the signal that are separated in time include the parts indicating the acoustic oscillations emitted by the flame in the combustion chamber and received directly by a single acoustic sensor, and the parts indicating the reflections of the emitted acoustic oscillations by the flame; as well as on the basis of evidence, determine the presence of flame in the combustion chamber.

A stand for testing gas turbine engines in conjunction with a digital automatic control and monitoring system (RF Patent 89178, publ. 27.11.2009), including a gas turbine engine, actuators, sensors, a digital automatic control system and control, a personal computer, a remote control, technological bench systems are known The actuators are connected to a gas turbine engine, the personal computer is connected via an interface to a digital automatic control and monitoring system, and a remote control n with a digital system of automatic control and monitoring, technological bench systems are connected to a gas turbine engine, the console is connected to technological bench systems, the output of a gas turbine engine is connected to sensors, and additionally contains a dial-up field connected to the control winding of the relay, k (n + 4) toggle switches in the dial pad, k failover buttons, n + 4 relays, adder, n + 1 dc voltage sources, the first contact of the first relay connected to the input of the actuators, the second contact t the first relay is grounded, the first contact of the second relay is connected to the third contact of the first relay, the third contact of the third relay is connected to the digital input of the automatic control system, the digital output of the automatic control system and control is connected to the third contact of the second relay, the third contact of the fourth relay is connected to the first contact of the third relay, the second contact of the fourth relay is grounded, the sensor output is connected to the first input of the adder, the third contacts from the fifth to the n + 4 relays are connected to the inputs of the adder co Respectively, the outputs of the voltage sources from the first to p are connected to the second contacts of the fifth to (n + 4) -th relay, the output of the adder is connected to the first input of the fourth relay, the first contact of the fail-on button is connected to the input of the (n + 1) voltage, the second contact of the button to turn on the failures is connected to the input of the dial-up field, the first contacts of the control winding of the relay from the first to n + 4 are connected to the first to n + 4 outputs of the dial-up field, the second contacts of the control windings are grounded.

Known stand for testing and measuring the performance of a gas turbine engine (RF patent 2567470, publ. 10.11.2015, selected as a prototype), containing a design for fixing the engine, the input and output gas lines, power supply systems, fuel and oil, measurement system parameters works consisting of such units and assemblies as receivers of air pressure with receiving holes, equipped with electric heating anti-icing system and connected to pressure sensors, as well as temperature sensors outdoor air nozzles and a calculator of operating parameters, all the units and units of the system are placed in a single aerodynamically streamlined body, while for an engine with an inlet guide, it is equipped with at least two pressure devices with means for connecting with devices for measuring pressure and temperature gas and / or liquid flow in each of them, pressure devices are located in different circumferential positions at a distance from each other in the radial direction on the uprights of the inlet guide vane a and fixed with the ability to measure the total pressure and temperature.

The disadvantages of the above-described analogs include the insufficiently high accuracy and reliability of measurements, as well as the inability to diagnose sensors when measuring and calibrating pressure sensors during testing.

The problem to which the claimed invention is directed, is the elimination of these disadvantages analogues.

The technical result is to increase the reliability and accuracy of measurements by providing the possibility of self-diagnosis and calibration of pressure sensors in the process of testing.

The technical result is achieved by a pressure transducer module (6), which contains a platform (11) with a pressure transducer (12) fixed on it, a manifold (13) with at least two distributors (20) with electric control and an attachment element (14) module (6) pressure transducer. The pressure transducer (12) is connected to a manifold (13), which is made with four inlets for supplying the measured pressure and one inlet for supplying pilot air. Three of the four inputs for supplying the measured pressure are made with the possibility of connection with the device under test, and the fourth input is made with the possibility of connection with the receiver (2).

The mounting of the pressure transducer (12) to the platform (11) of the sensors can be carried out with the help of a bracket (15) and a nut (16).

To connect the pressure transducer (12) with a manifold (13), a tube (17) with collet nipples (18) at both ends can be used, while a pressure nut with a nipple (19) can be installed at one end of the pressure transducer (12) and Collet fitting for connection to the manifold (13).

The technical result is also achieved by a device for measuring pressure, which contains modules (6) of pressure transducers. Moreover, the pressure measurement device also contains a frame (1), at least two receivers (2), a base plate (3), an upper plate (4) with holes, flanges (5) for fastening the pressure transducer modules (6), fitting (7 ) for connecting tubes, at least one pressure regulator (9), a bar (8) for fastening at least one pressure regulator (9) and fixing bars (10), which are made with the possibility of fastening DIN rails. At least four pressure transducer modules (6) are connected to each receiver (2), each module (6) being designed to measure pressure in a specific range. The collectors (13) of the modules (6) are connected to one receiver (2) through one of the inputs of each collector (13), and the other three inputs of each collector (13) are designed to be connected to the device under test. One of the at least two receivers (2) is designed to be connected to an external source of compressed air.

At least one module (6) of the pressure transducer can be designed to measure pressure in a range other than the range of pressure measurement of at least one other module (6).

The number of receivers (2) may be four.

At least one receiver (2) can be made with the ability to connect to an external source of compressed air using a tube (21) and a collet fitting (7).

At least one pressure regulator (9) may be proportional.

At least one regulator (9) can be attached to the bar (8) by means of a bolted joint.

The frame (1) can is a structure made by welding.

At least one module (6) of the pressure transducer can be designed to measure pressure in the range equal to the pressure measurement range of at least one other module (6).

At least one receiver (2) that is not connected to an external source of compressed air can be connected to at least one pressure regulator (9).

In addition, the technical result is achieved by the method of operation of the device for measuring pressure with the modules of pressure transducers. The method consists in that one receiver (2) of at least two receivers (2) is connected to an external source of compressed air, and also at least one other receiver (2) is filled with compressed air through at least one regulator (9 a) pressure, which in a at least one receiver (2) connected to it provides a predetermined pressure value. The pressure of at least two receivers (2) is different, and during operation of the device each pressure converter (12) is connected to one of four inputs intended for connection to the measured pressure sources corresponding to the collector (13), and three inputs are connected to sources measured pressure of the device under test, and the fourth is connected to the receiver (2) for calibrating the pressure transducer (12).

Compressed air from an external source of compressed air can be supplied to one receiver (2) from at least two receivers (2) with a pressure of at least 8 bar.

FIG. 1 shows a general view of the container.

FIG. 2 shows a frame with receivers;

FIG. 3 shows a frame with receivers and proportional pressure regulators;

FIG. 4 shows a pressure transducer module;

FIG. 5 shows a manifold with pressure distributors;

FIG. 6 shows the modules of pressure transducers on the frame with receivers.

1 - Rama;

2 - Receiver;

3 - Base plate;

4 - Top plate with holes;

5 - Flange for mounting pressure transducer modules

6 - Pressure converter module;

7 - Fitting for connecting the tube;

8 - Mounting plate of proportional pressure regulators;

9 - pressure regulator;

10 - Fastening plates;

11 - Platform;

12 - pressure transducer;

13 - Collector;

14 - Module fastening element (6);

15 - Staple;

16 - Nut;

17 - Tube;

18 - Collet fitting;

19 - Union nut with nipple;

20 - Distributor;

21 - Tube connecting the receiver to an external pressure source;

22 - Pilot air line.

Tests of gas turbine engines suggest the study of the uniformity of the pressure fields in one or another section. For a qualitative study of the pressure field, a sufficiently large number of points at which measurements are made are necessary. Often 30-50 samples are required, which in turn requires a correspondingly large number of measuring instruments. There are also high demands on the quality of measurements, that is, the instruments must have a high accuracy of measurements and be well calibrated. The sensors should be calibrated both before and during the test, since during the operation of the bench equipment there is a likelihood of various sources of electrical interference that knock down the sensors, thereby affecting the accuracy of measurements.

The pressure measurement device with pressure transducer modules (6) is a measuring system designed for operation on test benches. This system allows you to measure at the same time in several tens of points, and calibrate the pressure sensors during the test.

The pressure measurement device consists of a frame (1), which is a welded structure consisting of at least two receivers (2), it is preferable to have four receivers (2), a base plate (3), an upper plate (4) with holes, flanges (5) for fastening the modules (6) of pressure transducers, fitting (7) for connecting tubes, strip (8) for fastening pressure regulators (9), fastening plates (10), made with possibility of fastening DIN rails.

At least four pressure transducer modules (6) are connected to each receiver (2). Each module (6) of the pressure transducer can be selected in such a way as to provide a pressure measurement in a certain range other than the pressure measurement range of other modules (6), or to have the same pressure measurement range, which also improves the measurement accuracy. Also, the pressure measurement device includes at least one pressure regulator (9), which may be proportional. The preferred number of pressure regulators (9) is determined based on the number of receivers (2), namely, each receiver (2), besides connected to an external source of compressed air, is connected to at least one pressure regulator (9). At least one pressure regulator (9) is attached to the frame with a bolted connection.

The pressure transducer module (6) consists of a platform (11), a pressure transducer (12) with a pressure sensor installed in it, at least two distributors (20) with electric control located on the manifold (13), a module mounting element (14) ( 6) pressure transducer. The pressure transducer (12) is attached to the platform (11) by any known method, for example, a clip (15) and a nut (16), and is connected to the manifold (13) by a tube (17) with a collet nipple (18) on the collector side (13) and a cap nut with a nipple (19) and a collet fitting (18) on the sensor side of the transducer (12).

The claimed device works as follows.

One of the at least two receivers (2) is connected by a fitting (7), made of a collet, using a tube (21) to an external source of compressed air, which creates pressure with the value required for pilot powering the pressure transducer modules (6). The magnitude of this pressure is typically at least 8 bar. The remaining at least one receiver (2) is filled through at least one pressure regulator (9), which may be a proportional pressure regulator (9). At least one pressure regulator (9) in a at least one receiver (2) provides pressure of a given value with high accuracy. Thus, the pressure in each of the at least two receivers (2) will be different and have the specified values necessary for testing and performing calibration and monitoring the accuracy of the pressure readings directly during the test.

At least two distributors (20) with electric control are made with the possibility of transmitting measuring pressure to the converter (12), and also calibrate the converter (12) during the tests. The collector (13) has four inputs designed to be connected to the sources of the measured pressure, three of which are supplied with the measured pressure from the device under test, and one to the air for calibration from the receiver (2). Thus, either one of the three samples is measured, or the converter (12) is being calibrated. Switching control between the collector inlets (13) can be done by any known method, for example, by supplying pilot air, or by electromagnetic valves. Pilot air is supplied to the inlet of the collector (13) through the line (22) of the pilot air supply. Calibration is done by measuring the pressure from the receiver (2). Since the pressure in the receiver (2) is adjusted by the proportional regulator (9) with high accuracy, then, comparing the measurement result with the pressure set in the receiver (2), it is possible to judge the accuracy of the readings of the converter (12).

Thus, the pressure measurement device with pressure transducer modules allows to increase the reliability and accuracy of measurements by providing the possibility of self-diagnostics and calibration of pressure sensors during testing.

Claims (14)

1. A module (6) of a pressure transducer containing a platform (11) with a pressure transducer (12) fixed on it, a manifold (13) with at least two distributors (20) with electric control and a module fastening element (14) ( 6) pressure transducer, the pressure transducer (12) is connected to a manifold (13), which is made with four inlets for supplying the measured pressure and one inlet for supplying pilot air, and three of the four inlets for supplying the measured pressure are connected with the device under test, and the fourth input is made with the ability to connect to the receiver (2). 2. Module according to claim 1, characterized in that the pressure transducer (12) is attached to the platform (11) of the sensors by means of a bracket (15) and a nut (16). 3. The module according to claim 1, characterized in that the tube (17) is used to connect the pressure transducer (12) to the manifold (13) with collet nipples (18) at both ends, while at one end of the pressure transducer (12) union nut with nipple (19) and collet fitting for connection to the manifold (13). 4. A device for measuring pressure, containing modules (6) of pressure transducers according to claims 1-3, comprising a frame (1), at least two receivers (2), a base plate (3), an upper plate (4) with holes, flanges (5) for fastening the modules (6) of pressure transducers, fitting (7) for connecting tubes, at least one pressure regulator (9), bar (8) for fastening at least one pressure regulator (9) and fastening bars (10) configured to mount DIN rails, with at least four modules connected to each receiver (2) (6) pressure receivers, each module (6) being configured to measure pressure in a specific range, collectors (13) of modules (6) are connected to one receiver (2) through one of the input collectors (13), and three other inputs of each collector (13 ) made with the possibility of connection with the test device, one receiver (2) of at least two receivers (2) made with the ability to connect to an external source of compressed air. 5. The device according to claim 4, characterized in that at least one module (6) of the pressure transducer is designed to measure pressure in a range different from the range of pressure measurement of at least one other module (6). 6. The device according to claim 4, characterized in that the number of receivers (2) is four. 7. The device according to claim 4, characterized in that at least one receiver (2) is configured to be connected to an external source of compressed air using a tube (21) and a collet fitting (7). 8. The device according to claim 4 or 7, characterized in that at least one pressure regulator (9) is proportional. 9. The device according to claim 7, characterized in that at least one regulator (9) is attached to the bar (8) by means of a bolted connection. 10. The device according to claim 4, characterized in that the frame (1) is a structure made by welding. 11. The device according to claim 4, characterized in that at least one module (6) of the pressure transducer is designed to measure pressure in the range equal to the range of pressure measurement of at least one other module (6). 12. The device according to claim 7, characterized in that at least one receiver (2), not connected to an external source of compressed air, is connected to at least one pressure regulator (9). 13. The method of operation of the device for measuring pressure with pressure transducer modules, which consists in the fact that one receiver (2) from at least two receivers (2) is connected to an external source of compressed air, and at least one other receiver (2) is filled compressed air through at least one pressure regulator (9), which provides a specified pressure value in the at least one receiver (2) connected to it, and the pressure of at least two receivers (2) is different, and during operation of the device is Each pressure transducer (12) is connected to one of four inputs intended for connecting to the sources of measured pressure of the corresponding manifold (13), with three inputs connected to the sources of measured pressure of the device under test, and the fourth is connected to the receiver (2) to calibrate the converter (12 ) pressure. 14. The method according to p. 13, characterized in that compressed air from an external source of compressed air with a pressure that is at least 8 bar is supplied to one receiver (2) of at least two receivers (2).

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