SU1252805A1 - Device for registering time of flight of helicopter - Google Patents

Abstract

The invention relates to aircraft instruments and is intended for use on board helicopters for any purpose during their operation. The device provides high accuracy of automatic registration of the time of a helicopter raid. When the helicopter is raised, a pressure jump occurs in the hydraulic system of the chassis. This jump is detected by a contact pressure sensor, In it / f / 2 CO 1 t Hw. Msch g P FIG.

Description

membrane 9 deflects and short-circuits the movable contact 17 and the first sub-short. contact 18. The deviation of the membrane 9 occurs due to the difference in the cross sections of the fittings 12 and 13 connecting the cavity 10 and 11 of the sensor with the hydraulic system of the landing gear of the helicopter. Closing the contacts 17, 18 triggers the relay 19. It becomes

The invention relates to aviation. instruments and is intended for use on board helicopters for any purpose in the course of their operation, in particular on helicopters of the civil air fleet in the course of their operation for recording the time of flight.

The purpose of the invention is to improve the accuracy of the device for recording the time of flight of a helicopter.

A functional diagram of the device for recording the time of a helicopter raid is shown; Fig. 2 shows a circuit for the implementation of a contact pressure sensor.

The device contains a first power source f, connected to timer 2 placed in housing 3, via plug connectors 4 and 5, pressure contact sensor 6, plug connector 7, sensor housing B of sensor 6, membrane 9, first 10 and second cavities 11, fitting 12 with adjustable cross section, fitting 13, adjusting screw 1.4 of fitting 12, contact assembly 15 consisting of a second fixed contact 16, a movable contact

17 and the first fixed contact 18, the first relay with the winding t9, the first 20 and the second 21 closing contacts, the second relay with the winding 22 and the opening contact 23, the key 24 and the second power source 25.

The device for recording the time of flight of the helicopter operates as follows.

When the helicopter takes off and is taken off the ground, the pressure of the amortization fluid

on self-blocking and with its contacts, timer 2 is connected to power supply 1. When the helicopter lands, a reverse pressure jump occurs and a second fixed contact 16 and a moving contact 17 operate. This triggers relay 22 and unlocks relay 19. In this case, timer 2 is turned off.

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The bones in the main legs of the chassis change, namely, decrease, which leads to a change in fluid pressure in cavities 10 and 11. At the same time, the rate of change in fluid pressure in cavity 10 is greater than in cavity 11 due to the fact that the cross-section of the choke 12 is larger than the cross section of fitting 13. Thus, the membrane 9 with the contact 17 installed on it is deflected - And the contacts 17 and 18 are closed, as a result of which the relay 19 triggers and with its contacts 21 it connects the timer 2 through the switch 24, which is turned on position, to the source of power 1. When the pressure of the fluid is increased into cavities 10 and 11, the membrane 9 returns to its original position and contacts 17 and 18 are opened. The relay 19 is fed through the contacts 20 and 23. When the helicopter lands and touches the ground, the pressure of the damping fluid in the main legs of the chassis increases, which leads to a change in pressure in cavities 10 and 11. At the same time, the rate of increase in pressure in cavity 10 is greater than than in cavity 11. At the same time, the membrane 9 deviates and the contacts 16 and 17 are closed, as a result of which the relay 22 triggers and by its contacts 23 breaks the power supply circuit of the relay 19. Thus, the relay 19 disconnects the timer 2 from the power supply 1 with its contacts 21.

Claims (1)

Invention Formula A device for recording the time of flight of a helicopter, containing The first power supply, the first output of which is connected to the first input terminal of the timer, the key and the contact pressure sensor, is extracted from the case of two cavities between which the membrane of the first fixed contact is located, and the movable contact that is fixed on the membrane, the first a fixed contact is installed in the zone of movement of the movable contact in the first cavity of the housing, the second cavity of which is provided with a fitting, characterized in that, c. in order to improve accuracy, a second power source and a relay were introduced into it, a fixed contact was inserted into the contact pressure sensor installed in the moving contact zone in the second housing cavity, the first cavity of which is equipped with a choke with adjustable cross section. Compiler G. Usachev Editor O. Golovach Tehred I. Veres Proofreader I. Muska Order 4623/50 Circulation 466 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 The outlets of the fittings of both cavities are connected to the hydraulic system of the helicopter landing gear supports, the moving contact of the contact pressure sensor is connected to the first output of the second power source, the second output of which is connected to the first and second fixed contacts of the contact pressure sensor, respectively a moving contact through a disconnecting contact of the second relay connected in series and the first contact of the first relay connected to the first fixed contact of the contact yes snip pressure, the second terminal of the first power supply via series connected switch and a second normally open contact of the first relay connected to the second input terminal of the timer.