DEVICE FOR AIR SAMPLING FROM AVIATION GAS TURBINE ENGINES FOR TESTING IN FLYING LABORATORIES Russian patent published in 2017 - IPC G01N1/22 G01M15/00 

FIELD: engine devices and pumps.

SUBSTANCE: invention relates to a technique for air sampling from a compressor of aviation turbine engines (ATE) to study the extent of air pollution by products coming in with air into the air conditioning system (ACS), as well as determining the composition of harmful impurities, hazardous concentrations in the air of gases and vapors. The device contains a diffuser with an internal nozzle oriented in the direction of the flow of air sampled from the gas turbine engine, a tee, solenoid valves, samplers with built-in concentrators and vacuum tanks. The diffuser nozzle is made with one internal output connected to a flat tee, located in the same plane with the diffuser. The solenoid valves are mounted directly on the sampler inlet branch pipes in such a way that the inlet branch pipe of the corresponding sampler is screwed into an adapter fixed in the body of the solenoid valve and at the outlet to the valve body by a lock nut to reduce losses of the sample components. The internal output of the adapter is made merging into a saddle for mounting a solenoid valve directly onto the inlet branch pipe of the corresponding sampler, and the input contacts with the valve piston interconnected with the electromagnet. The body of the solenoid valve is in the form of an expansion chamber, at the ends of which there is an expansion nozzle supplying air sampled from the engine and an outlet branch pipe in the opposite side of the body for the release of excess air through a jet. At the same time, its flow cross-section is designed to control the temperature inside the expansion chamber in order to avoid the condensation of impurities in it. The solenoid valve, installed on the surface of the expansion chamber, is configured to open during air sampling and to shut off the sampler with a piston with a rubber valve after air sampling in flight testing of aviation gas turbine engines.

EFFECT: reduction of the dimensions of the device without deteriorating its metrological characteristics providing for installation on a flying laboratory and reduction of the error in measuring the impurity concentrations in the air of gas turbine engines sampled for the needs of the aircraft air conditioning system by decreasing background pollution.

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