Rotary joint for a moving-vane multifunction pressure probe
AssigneeThales
InventorsLionel Collot, Nicolas Hanson, Philippe Roberge
Life of this patent
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Abstract
The present invention relates to pressure probes for measuring the aerodynamic flight parameters of an aircraft and more particularly those in which the orifices for measuring the static pressure and total pressure are located on a moving angle-of-attack or angle-of-sideslip measurement vane designed to be oriented in the direction of the wind. It consists of a pneumatic rotary joint employing flexible tubings rather than friction rotary joints between abutted parts of rigid tubings. Such a joint offers a much smaller resistance to the rotational movement of the moving vane, which consequently is oriented with greater accuracy in the direction of the wind.
Claims19
A rotary joint for a multifunction pressure probe, comprising a fastening base equipped with a bearing, a moving vane free to rotate over a limited deflection and provided with a root swiveling in the bearing of the fastening base, pressure tap orifices located on the moving vane, pressure sensors placed on the outside of the moving vane and air lines that connect the pressure tap orifices to the pressure sensors passing through the root of the moving vane and the bearing of the fastening base, said rotary joint comprising a plate, which can rotate relative to the root of the moving vane and is fastened to the fastening base with respect to which it has a slight depth deflection, along the axis and at a distance from the bearing that supports the moving vane, and lengths of flexible tubing that connect the root of the moving vane to the plate and constitute the air lines over part of their path going from the root of the moving vane to the plate beyond which the pressure sensors are placed.
Dependencies are inferred from the claim text.