Device for pressure tapping and procedure for setting it on a fuselage panel of an aircraft

Abstract

Device for pressure tapping, integrated into the fuselage of an aircraft, comprising an integrated plate (10), without discontinuity, with a pressure tapping part in the center (16). The plate (10) enters a supplementary opening (22) formed in a fuselage panel (20). The plate (10) and the panel part (20) surrounding the opening (22) are fixed on a supporting element (18) linked to the framework of the aircraft (34, 36). In the case where rivet, screw or bolt type fixations are used, they are placed at the edge of the plate (10). This arrangement facilitates assembly and improves the precision of the measurement, by suppressing any discontinuity in the measurement zone.

Description

[0001] The present invention relates to a device for pressure tapping intended to be implanted on the fuselage of an aircraft.[0002] The invention also concerns a procedure for setting such a device for pressure tapping on a fuselage panel of an aircraft.STATE OF PRIOR ART[0003] Aircraft and in particular aeroplanes are equipped with different probes designed to measure a certain number of parameters. These parameters are then transmitted to the equipment, in such a way as to ensure correct operation of the aircraft and its instruments. Thus, certain probes, located near the reactor, supply information making it possible to follow the behaviour of the engine (temperature of gas ejection, rev / min, etc.). Other probes, installed under the fuselage, deliver information about the environment outside the aircraft (temperature, pressure, etc.).[0004] Among the probes installed under the fuselage of the aircraft, one finds probes for measuring static pressure. The information delivered by ...

AI Technical Summary

Problems solved by technology

First of all, the machining of a small circular opening 7 in the fuselage panel 5 causes deformation and thus significant stresses in this panel. The high number and setting of the rivets used to fix the panel 5 on the support element 3 accentuate this deformation. In addition, the heads of the rivets located in the immediate proximity of the pressure tapping part 2 of the device S contribute to local disturbance of the aerodynamic flow. This results in measurement errors and thus a loss of precision of the probe.

Moreover, the levelling operation carried out after mounting the device S is an industrially complicated operation.

In fact, since the tolerances are very low, this operation requires great precision...

Images