Device for simulation of processes of decomposition of lubricant oils in compressors of aviation gas-turbine engines

FIELD: motors and pumps.

SUBSTANCE: simulation device contains an oil batcher, a dispersion chamber and a lubricant oil decomposition chamber (1). At the air outlet downstream the chamber the diffuser (2) is located. On the chamber the heater (3) with the thermocouple (4) and the thermorelay (5) is installed. The device includes the air duct (6) supplying the pumped-over hot air into the lubricant oil decomposition chamber connected through the manometer (7) to the air compressor (8). The device contains the cylinder (13) filled with ultra-pure nitrogen, (23, 24) the sealed gage tank with air cavity with oil and a cover for oil filling, with the oil pipeline connected to it through the gas pipeline with the regulator (12), the adapter (11) and cap nuts. The gage tank (9) is connected through the adapter (11) with cap nuts (20, 21) to the measured capillary (15) in a cooling jacket (16) with circulating water through the thermostat with the pump (18) and radiators, attached to the decomposition chamber by means of the cap nut (22) and the sealing cone (25). Also the device comprises the additional chamber (26) screwed to the main decomposition chamber of (1) coaxially and sealed with a gasket (27), with the rod with a flywheel (17) installed inside, with threaded and non-threaded parts. Meanwhile the threaded part is implemented with a possibility of movement in the internal washer with a thread (28) for adjustment of the decomposition chamber volume and change of conditions of simulation of oil concentration, while the non-threaded part is sealed in a gland with graphite seal (29).

EFFECT: improvement of accuracy of simulation of composition of oil decomposition products in aviation gas-turbine engines.

1 dwg

 

The invention relates to simulation of processes of decomposition of lubricating oils for gas turbine engines (GTE) to conduct research on the toxicity of decomposition products of lubricating oils and to reduce the number of flight air samples of aircraft cabins (LA) in the study of air pollution with harmful substances coming together with the air in the air conditioning system (ACS), and determining the composition of contaminants, hazardous air concentrations of gases and vapors, increasing the sensitivity of their determination.

The main source of air pollution of aircraft cabins - ash lubricating oil from front supports engines with subsequent complete or partial decomposition in the path of the compressor of the gas turbine engine (GTE) in different operational modes. Complex mixture of vapours and aerosols of lubricating oil, a pair of aliphatic hydrocarbons, acrolein, formaldehyde, phenol, cresol, acetic acid, benzene, Tricresyl phosphate, ethyl, propyl, butyl and isobutyl alcohols, acetone, toluene, xylene, monoxide and carbon dioxide comes from the air conditioning system in the cab LA. In addition, the air booths LA polluting discharge from finishing materialov cab and anthropotoxins and to identify the source of contamination and migration associ�of the necessary data about the full composition of the products of oil degradation in GTE on a particular mode of flight and the air sampling GTE in flight is very difficult.

The proposed device can be used during factory testing and certification LA for compliance with the requirements of §831 AP-25 (Aviation regulations. Part 25. The airworthiness standards of transport category airplanes. 2008), similar to AP-29 (helicopters) and AP-23 (civilian light aircraft) and in conducting Toxicological studies.

Known "Method of evaluating the corrosion properties of engine oils" (copyright certificate AC No. 129872, publ. 59 G.) and device for components containing expendable tank, a pump for pumping motor oil, which is sprayed on the heated wall of the tank and flows down. The oil should wash the surface of the plates. However, this device does not ensure the accuracy of modeling the composition of the products of oil degradation in aircraft gas-turbine engine by replaying the concentration of oil degradation in aircraft gas-turbine engine, controlling the residence time of oil in the hot zone, change the mode of operation of the device to simulate specific modes of decomposition of oil in gas turbine engines.

The closest in technical essence to the proposed device is the device described in the patent for invention of the Russian Federation No. 2476852 dated 13.02.2012. Known "Method of estimating the purity of air Germain aircraft coming from the compressors �aturbine engines the content of decomposition products of lubricating oils and the device containing the syringe dispenser is filled with lubricating oil, the plunger of the syringe-dispenser with electric drive, the membrane evaporator, the heat insulator, the temperature sensor, thermostat, the expansion chamber of the oil with the diaphragm at the exit of the air flow from the chamber to regulate the volume of the chamber inside of her steel balls placed, a heater located on the camera. To create air pressure in the chamber is installed a duct that is connected via the pressure gauge to air compressor (Pat. RU № 2476852, 13.02.2012).

In the syringe-pipette draw oil, identical to used in the engine. Syringe needle pierces the membrane and the heat insulator evaporator, combined with the expansion chamber of the oil is placed inside to control the volume of steel balls. In the expansion chamber using a heater, temperature sensor and thermostat creates a temperature equal to the temperature of a given stage of selection of the compressor. The air pressure in the chamber equal to the pressure in the stage selection GTE, created with the help of compressor and controlled by a manometer. The airflow is controlled via selection of the cross section of the diaphragm to simulate residence time of oil in the hot zone of the engine. The residence time of oil in the hot zone, calculated as the ratio of the volume of the hot zone of the compressor of the engine, Vacha�keetsa of the geometrical parameters of the engine, where decomposition of oil, to the volumetric rate of air through this stage.

The disadvantages of this design include the fact that to enter the oil in a heated chamber used a syringe with which it is difficult to achieve reproducible results, the concentrations of the products of oil degradation due to uneven flow of oil itself. Difficult analysis of the number of introduced oil during the experiment. In addition, the decomposition of oil begins in the syringe needle, which distorts the data on the composition of decomposition products. In the described device in the course of the experiment (without disassembly design) cannot change the basic parameter is the residence time of oil in the hot zone, because the volume of the chamber decomposition here is fixed.

The technical result, the aim of the invention is to improve the accuracy of modeling the composition of the products of oil degradation in aircraft gas-turbine engine by replaying the concentration of oil degradation in aircraft gas-turbine engine, controlling the residence time of oil in the hot zone, change the mode of operation of the device to simulate specific modes of decomposition of oil in gas turbine engines. The proposed device after appropriate metrological certification can be applied for testing overall systems air sampling GTE (SOPS).

To achieve the UK�mentioned technical result in the device for simulation of processes of decomposition of lubricants in the compressors of aircraft gas turbine engines containing the oil dispenser chamber sputtering and decomposition of lubricating oils, a diffuser at the outlet of the air flow from the chamber, placed on the chamber heater (tubular furnace) with thermocouple and thermal overload relay, air duct, inlet pumping hot air into the expansion chamber of lubricating oils, are connected through a pressure gauge to the air compressor, the device comprises a cylinder filled with high purity nitrogen, connected with it by pipeline through the regulator, adapter and cap nut sealed with a volumetric capacity of the air cavity, with butter and cover for Gulf oil, with an oil line, connected through the adapter with Union nut to the measuring capillary in the cooling jacket with circulating water through thermostat, pump and radiators attached to the expansion chamber through the Union nut and cone seal, additional camera, bolted to the main expansion chamber coaxially and sealed by the gasket, is installed inside the stock flywheel, with sliced and chopped pieces, where the cut portion is formed to be movable in the inner washer threaded to regulate the volume of the chamber decomposition and changes in the terms of modeling the concentration of oil rather than the sliced part is sealed in the stuffing box with graphite seal.

Thus, during about�nogo experiment without its termination it is possible to simulate all the processes of decomposition of oil in the compressor GTE (changes in temperature and air pressure time finding oil in the hot zone), which significantly reduces the time of the experiment.

Fig. 1 is a diagram of the proposed device.

The device for simulation of processes of decomposition of lubricants in the compressors of aircraft gas turbine engines contains the oil dispenser chamber sputtering and decomposition of lubricating oils (1), diffuser (2) the output flow of air from the chamber, placed on the chamber heater (3) (tube furnace) with thermocouple (4) and a thermostat (5), the duct (6), inlet pumping hot air into the expansion chamber of lubricating oils, are connected through a pressure gauge (7) to an air compressor (8), the oil dispenser is made of a sealed volumetric capacity (9), which is fed under pressure nitrogen through the gas pipe (10) connected through the adapter (11) and controller (12) to the cylinder (13), and the supply of oil in the expansion chamber (1) is carried out using makovody (14) from adapter (11) and through a measuring capillary (15), thermostated circulating water at room temperature in the cooling jacket (16) that provides an even flow of oil into the chamber, and the measuring device (9) before and after the experiment weighed to determine feed speed. The oil is evenly sprayed with hot air from the heated air duct without decomposition in a capillary (15). To change the simulation conc�AI oil chamber volume adjust by screwing in the threaded rod (17) on the thread performed inside the camera, not the cut portion of the rod moves additionally inside mounted outside of the compartment of the camera through the graphite seal with a lock nut.

In addition, the device comprises a cylinder filled with high purity nitrogen (high purity) (13), the controller (12) with the gas pipe (10) connected through the adapter (11) and nut (23) and (24) with a sealed air cavity volumetric capacity (9) with butter with lid (19) for Gulf oil, the oil line (14) from adapter (11) and cap nuts (20) and (21), the measuring capillary (15) in the cooling jacket (16) circulating water through thermostat to the pump (18) and a radiator that attaches to the expansion chamber through the cap nut (22) and cone seal (25), additional camera (26), bolted to the main chamber of the decomposition (1) (coaxial) and sealed gasket (27), stock flywheel (17) with sliced and unsliced part where the cut portion is moved in the inner washer with a thread (28) and not the cut portion is sealed in the stuffing box with graphite seal (29).

The operation of the device.

The device operates as follows. First set of modeled air parameters in the CCD (temperature and air pressure, the residence time of oil in the compressor stage CCD). Before starting work estimated or experimentally opredelaetsa� internal volume of the chamber decomposition (1) when fully screwed and twisted the stem (17) and the intermediate values (different number of revolutions of the spindle (17)). In the measuring device (9) through the neck with a cover (19) is filled with the investigated oil. Together with the pipeline (10) (up to the pressure regulator (12)) and maslovozom (14) no adapter (11) capacity is weighed. Further, it is attached through the adapter (11) with Union nut (23) and (24) to the pressure regulator (12) of the container with nitrogen (13) and through the adapter (11) with Union nut (21) and (22) to the capillary (15), with a cooling jacket (16) and radiators (30) to which is connected a water thermostat with the pump (18). The speed of the outflow of oil from the tank (9) depends on the differential pressure of nitrogen in the tank, set the pressure regulator (12), and air pressure gauge (7) on the decomposition (1) and the cross section of the measuring capillary (15). The pressure of nitrogen, and if necessary, the cross section of the capillary is selected empirically. The device is completely assembled. With the help of the stem (17) sets the required volume of the chamber. On exit from the cell decomposition with a cap nut (31) is screwed diffuser (2) the desired cross-section with a fitting to ensure the required flow rate of polluted air at a chosen pressure in the expansion chamber. Set the necessary parameters of the air compressor (8) controlled by a pressure gauge (7). Tubular furnace (3) via thermal overload relay (5) with the selected temperature is energized and when you exit the preset mode by thermocouple (4 the pressure in the container (9) is raised by the pressure regulator (12) to obtain the necessary differential pressure across the capillary (15) and provide the required oil flow. The flow is stable, because the capillary termostatica, and the differential pressure is kept constant during the whole experiment. Oil consumption for the experiment is determined by difference of weight of the tank with oil before and after the experiment (after disconnecting the cylinder in its place connects vacuum line to the waste oil from maslovoza and capillary). All parameters except speed oil consumption (change is undesirable due to the decrease of metrological characteristics), the needs vary within a wide range during the experiment. They are selected depending on the purpose of use of the received gas stream containing decomposition products of lubricating oil under conditions that simulate conditions in the compressor GTE and at constant concentration. The air pressure in the chamber equal to the pressure in the stage selection GTE, created with the help of compressor and controlled by a manometer. The airflow is controlled via selection of the cross section of the diaphragm to simulate residence time of oil in the hot zone of the engine. The residence time of oil in the hot zone, calculated as the ratio of the volume of the hot zone of the compressor of the engine, is calculated from the geometric parameters of the engine, where the oil degradation, flow rate of air through this stage.

All this allows, in addition to normal use � Toxicological experiments and in the use of the method of estimating the purity of air Germain aircraft coming from the compressors of gas turbine engines on the content of decomposition products of lubricant oils (patent for invention of the Russian Federation No. 2476852 dated 13.02.2012), can use this device with the metrological certification of the systems of air sampling GTE.

The device for simulation of processes of decomposition of lubricants in the compressors of aircraft gas turbine engines, containing oil dispenser chamber sputtering and decomposition of lubricating oils, a diffuser at the outlet of the air flow from the chamber, placed on the camera, heater with thermocouple and thermal overload relay, air duct, inlet pumping hot air into the expansion chamber of lubricating oils, are connected through a pressure gauge to air compressor, characterized in that the device comprises a cylinder filled with high purity nitrogen, connected with it by pipeline through the regulator, adapter and cap nut sealed with a volumetric capacity of the air cavity, with butter and cover for Bay oil, with the oil line that is connected via the adapter with Union nut to the measuring capillary in the cooling jacket with circulating water through thermostat to the pump and radiators attached to the expansion chamber through the Union nut and cone seal, additional camera, bolted to the main expansion chamber coaxially and sealed by the gasket,is installed inside the stock flywheel, with sliced and chopped pieces, where the cut portion is formed to be movable in the inner washer threaded to regulate the volume of the chamber decomposition and changes in the terms of modeling the concentration of oil rather than the sliced part is sealed in the stuffing box with graphite seal.



 

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23 cl, 5 dwg

FIELD: chemistry.

SUBSTANCE: apparatus includes a receptacle in the form of a sealed container whose lower part is fitted with a controlled two-way diaphragm valve, and a nozzle for feeding water used to wash the sample delivery line. The apparatus also includes a filter element, which is hermetically connected to a filtrate storage container, and an information control, display and transmission unit. The filter element is located in the working medium and is mounted on the sample removal line. To regenerate the filter surface, the apparatus includes a hydraulic pressure pulsator, which is installed on the sample removal line between a ball valve and a resistance disc, through which the sample is fed into the sample receptacle in the form of a sealed container, having a water-cooled jacket located at the end of the filtrate removal line.

EFFECT: invention improves the accuracy of monitoring process parameters, provides timely detection and rectification of process disorders, which enable to obtain more reliable data on the chemical composition of a solution.

1 dwg

FIELD: automatical aids for sampling liquids.

SUBSTANCE: system for sampling and delivering filtrate has filter submerged into tested medium and connected with collecting tank and vacuum pressure source which is connected with top hole of collecting tank by means of pneumatic pipe. System has sample receiving tank connected with collecting tank and control unit which has first output to be connected with vacuum pressure source. Collecting tank has two separated chambers - washing chamber and dispatching chamber. Lower hole of washing chamber has to be lower hole of collecting tank and side hole of dispatching chamber has to be side hole of collecting tank. Floating valve is installed inside washing chamber to shut off lower and top holes. Filter is connected with lower hole of collecting tank through sampling pipe. Side hole of collecting tank is connected with lower hole of tank for receiving samples through sampling pipe. Flow-type sensor and check valve are installed inside transportation pipe. Output of flow-type sensor is connected with input of control unit; second output of control unit is connected with control input of analyzer.

EFFECT: improved precision of measurement of sample ion composition; prolonged service life of filter.

1 cl, 1 dwg

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