Laboratory complex for sampling and gas chromatographic analysis of air samples

FIELD: testing equipment.

SUBSTANCE: invention is designed for sampling and precise comprehensive assessment of pollution of air samples (from air supplied into a system of aircraft pilot cabin conditioning), sampled from a compressor of a gas turbine aviation engine (GTE) during its bench testing, and further gas chromatographic analysis of samples for content of hazardous admixtures. A laboratory complex for sampling and gas chromatographic analysis of air samples includes a complex of air sampling 6 with a unit of samplers 7 and a control panel 8, a complex for gas chromatographic analysis of air samples 3 with a control panel 4, a package 9 for transportation of adsorption packets 10 and a container 11 for storage of concentrators 12. The laboratory complex is also equipped with plants for supply of gases 5, pumping of calibrating gas mixture 2 and definition of working volumes of a vacuumised part of the item 1. At the same time the plant for supply of gases 5 is simultaneously connected with the plant for pumping of the calibrating gas mixture 2 and with the complex of gas chromatographic analysis of air samples 3, and the plant for definition of working volumes of the vacuumised part of the item 1 is connected with the complex of air sampling 6.

EFFECT: improved operational properties, provision of sampling and precise comprehensive assessment, total error of measurement of pollution of air samples from a GTE compressor under bench testing, higher quality of indirect control of oil seals used in supports of the GTE compressor rotor.

8 dwg

 

The invention relates to the field of bench testing of aircraft gas turbine engines and is designed for the selection and accurate comprehensive assessment of contamination of air samples (supplied in an air conditioning system of the cockpit of an aircraft)taken from the compressor of a gas turbine aircraft engine (GTE) in bench trials, and subsequent gas chromatographic analysis of samples for the presence of harmful impurities.

The complex system of sampling, including the booth for sampling air with remote and hub system for chromatographic analysis of air samples, containers for transportation of adsorption package and storage container hubs [1].

This complex is the closest to the invention to the technical essence and the achieved result and accepted by the applicant as a prototype.

The disadvantage of this complex is its low performance due to inaccurate comprehensive assessment, the total measurement error of up to 20%, contamination of sampling air from the compressor of the CCD in bench trials, as well as the quality of indirect control used in the bearings of the compressor rotor GTE oil seals.

The technical result of the proposed invention the improved performance, about the provisions for the selection and accurate comprehensive assessment, the total measurement error up to 5%contamination of samples air from the compressor of the CCD bench, testing, and improving the quality of indirect control used in the bearings of the compressor rotor GTE oil seals.

This technical result is achieved by the fact that laboratory complex for sampling and gas chromatographic analysis of air samples, including complex sampling air block samplers and remote control system for gas chromatographic analysis of air samples, containers for transportation of adsorption package and storage container hubs, it is equipped with installations for gas supply, pumping calibration gas mixtures and determination of displacements vacuumized part of the product, and installation for gas supply at the same time connected with the installation of pumping calibration gas mixtures and complex gas chromatographic analysis of air samples, and installation of the definition of business volumes vacuumized part of the product associated with the complex sampling of air.

The essence of this invention is illustrated by a diagram (figure 1) and drawings

where: figure 2 - shows the complex for gas chromatographic analysis of air samples with a remote control;

figure 3 - installation for gas supply;

4 is a system for sampling air with remote control

figure 5 - installation for pumping the calibration gas mixture (ASG);

6 is a device for determination of displacements vacuumized portion of the product;

Fig.7. a container for storing hubs and packagings for the transportation of adsorption packages;

Fig - sampler with adsorption service and the hub.

Laboratory complex consists of the following parts:

- setup for determination of displacements vacuumized part of the product 1;

- installation for pumping ASG 2;

complex gas chromatographic analysis of air samples 3, remote control 4;

- installation for gas supply 5;

a system for sampling air 6, consisting of: block samplers 7 and the control unit 8;

- Tara 9 for transporting the adsorption of packages 10;

container 11 for storing the hub 12;

- sampler 13.

Installation for gas supply 5 simultaneously connected with the installation of pumping a mixture of (ASG) 2 and complex gas chromatographic analysis of air samples 3 and install the determination of displacements vacuumized part 1 associated with complex sampling air 6.

The laboratory complex is open as follows:

to measure vacuumized (measured) parts of the block samplers-7 complex for sampling air 6 connecting to an apparatus for ODA is dividing the working volume vacuumized part 1 (6) through the nozzle 18 of the vacuum pump and the fitting 19 vacuumized frequent block samplers-7 complex for sampling air 6. To close the valve 20. Pour into the tank 26 through the fitting 28 at an open valve 22 and the closed valve 23 of the measuring liquid. Pour into the measuring cylinder 14 and the pipe 15 connected to the device for determination of displacements vacuumized portion 1 through the nozzle 21, a measuring liquid in sufficient quantity to lower the pipe 15 into the measuring cylinder 14, if necessary, add fluid into the measuring cylinder 14 to the desired level. To close the valve 22 and valve 23 and 24 to open, creating a vacuum using the remote control 8, controlling the set pressure on the gauge 25. Having obtained the required vacuum in the system, close the valve 24 and turn off the vacuum pump, to withstand a certain time and record the pressure on the gauge 25. To open the valve 20 and over time to fix the vacuum but the vacuum gauge 25 and the liquid level in the measuring cylinder 14 while filling the tank 26 but the gauge 27. The liquid level in the measuring cylinder 14 will fall below the original, and in the tank 26 to rise due to the exhaustion, until the atmospheric pressure acting on the liquid in a measuring cylinder 14, are balanced with the pressure above the liquid in the tank 26. Next, open the valve 22, to restore atmospheric pressure in the system through the fitting 28. To close the valve 22 and zafiksirovat the ü the level of the measuring liquid (source) in a measuring cylinder 14. To close the valve 20. Disconnect the device for determination of displacements vacuumized part 1 from block samplers-7 complex for sampling air 6.

Next, place and connect the unit samplers 7 directly on the test bench at the place of sampling air from the compressor of the CCD and install adsorption packages 10 in the samplers 13 block samplers 7, and the control unit 8 on the workplace of the operator. To take samples of the air from the compressor at different modes of operation of the CCD according to the technical documentation, managing the process from the control panel 8. After completion of the sampling process to extract the adsorption packages 10 of samplers 13 and place them in a container 9 for transporting the adsorption of packages 10. Move the container 9 to the laboratory for gas chromatography analysis.

To connect to the installation for gas supply 5 complex gas chromatographic analysis of air samples 3, which consists of two chromatograph with a flame ionization detector (PID) and one detector, thermal conductivity (RTA) and pulled up to the chromatographs with the PID through the preparation of gases (BIT) gases helium, air, and hydrogen, using a remote control gas supply system 4, and to the chromatograph with an accident - helium, controlling the process with control panel installation for gas supply. On the involved in the installation for gas supply 5 installation for pumping. ASG 2 and to bring to it the calibration gas mixture, controlling the process with control panel installation for gas supply. To calibrate the chromatograph complex gas chromatographic analysis of air samples 3 according to the technical documentation. During calibration of the chromatograph with an accident to use the installation for pumping the ASG 2, according to the technical documentation. Remove the hub 12 of the adsorption of packages 10 and place them in the container 11 for storing hubs. Next, using the complex for gas chromatographic analysis of air samples 3, remote control 4 and the hub 12 to measure concentrations of harmful impurities in the samples of air according to the technical documentation. Further to perform the data processing on the computer using special software.

The use of this invention will improve the performance of the complex, to provide for the selection and accurate comprehensive assessment of contamination of air samples from the compressor GTE in bench trials, as well as to improve the quality of indirect control used in the bearings of the compressor rotor GTE oil seals.

Sources of information

1. Magazine "Motor" №3 (27) "New tools for monitoring the composition of the atmosphere of aircraft. P.15-17, 2003 - the prototype.

The laboratory is Torno complex for sampling and gas chromatographic analysis of samples of air, including a range of air sampling unit sampling and remote control system for gas chromatographic analysis of air samples, containers for transportation of adsorption of the packages and the container for storage hub, characterized in that it is equipped with installations for gas supply, pumping calibration gas mixtures and determination of displacements vacuumized part of the product, and installation for gas supply at the same time connected with the installation of pumping calibration gas mixtures and complex gas chromatographic analysis of air samples, and installation of the definition of business volumes vacuumized part of the product is associated with a set of air sampling.



 

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