Creating of pressure signaling devises of СРМ, СРМ6 and СРМ9 for drives-generators of GP23, GP25 and GP26
State enterprise "Kharkov Aggregate Design Bureau"
The aim is the development of signaling devise pressure for the units of the energy supply system of airplanes (drives-generators GP23, GP25-2 and GP26): - signaling devise СРМ for the drive-generator GP23; СРМ6 - for the drive-generator GP25-2; СРМ9 - for the drives-generators GP25 and GP26. Drives-generators of GP are the basic sources of feed electric power of side network of object. The drives-generators of GP are the main sources of feed electric power of the onboard network of object and consist of alternating current generator with hydromechanical drive constant turns/ Hydromechanical drive constant turns provides on the billow of generator permanent 12000 turns in a minute. The drive-generator of GP23 is used on the airplanes of Tu-204, Il-96, An-124, Tu-22М3; GP25 - on the airplanes of Il- 96, Su-30, Be-200, Tu-204; GP26 - on the airplanes of Tu-204, Tu-214. The purpose of the CPM signaling device is the closure of the electrical circuit when the differential pressure in the hydraulic system decreases to a predetermined value and the electrical circuit disconnection when the differential pressure in the hydraulic system increases to a predetermined value. CPM signaling device should include: - closing-disconnection circuit knot; - microswitch; - electro-connector. The CPM6 and СРМ9 signaling device must contain: - closing-disconnection circuit knot; - microswitch. Principle of operation of the signaling device is based on the ability of the spring-loaded piston to move under the action of a varying pressure drop acting on opposite sides of the piston. A piston, operation on the microswitch rod, opens or closes respective contacts of microswitch. The feed of signaling device comes true from network of direct-current by tension 27 volt. An environment for CPM is atmospheric air, for CPM6 and CPM9 - working fluid IPM-10