ANALYSIS AND SELECTION OF TEMPERATURE METERS IN EMERGENCY PROTECTION SYSTEMS FOR LIQUID JET ENGINES 

Smyslov Vladimir Ivanovich, candidate of technical sciences, chief designer in the direction, Scientific-production association measuring equipment (2 Pionerskaya street, Korolev, Russia), E-mail: vladismyslov@yandex.ru
Brazhnikov Yuriy Ivanovich, candidate of technical sciences, leading engineer, Central Research Institute for Machine Building (4 Pionerskaya street, Korolev, Russia), E-mail: mksagro08@mail.ru
Filippovich Pavel Alekseevich, chief technologist, Scientific-production association measuring equipment (2 Pionerskaya street, Korolev, Russia), E-mail: phill07@bk.ru
Gurova Svetlana Aleksandrovna, mastergraduate student, Peoples` Friendship University of Russia (6 Miklukho-Maklaya street, Moscow, Russia); engineer, Scientific-production association measuring equipment (2 Pionerskaya street, Korolev, Russia), E-mail: phill07@bk.ru 

621.317 

10.21685/2307-5538-2020-1-4 

Background. An analysis of the requirements for temperature meters for use in the emergency protection systems for liquid jet engines is carried out. The use of thermoelectric converters for these purposes is justified. The indicators confirming the presence of high temperatures are contradictory characteristics due to the high requirements for speed and weight.
Materials and methods. To better meet the requirements of the SAP LRE, it is proposed to use thermoelectric thermal converters with a sensitive element of variable crosssection, which has increased speed while maintaining high mechanical strength and stability.
Results. The typical design and technological solutions of thermoelectric converters used today in the SAP LRE are analyzed. It is shown how to improve their basic technical characteristics in the conditions of over-stressed operational factors.
Conclusions. A design and technological solution of a thermoelectric thermoconverter with ch.e. is proposed and justified. variable section, which was implemented in practice. The test results are shown, which showed a twofold increase in speed without reducing mechanical strength and stability. 

rocket and space technology, sensor-converting equipment, thermocouple cable, lag