F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
F24F 13/10 (2006.01) F16K 31/04 (2006.01) F24F 13/14 (2006.01) H02K 7/10 (2006.01)
Patent
CA 2155466
The invention relates to a spring return actuator for valves in heating, ventilation and air conditioning systems. The basic construction of the actuator comprises an electric drive (1), a reduction transmission (2) having a return spring for the spring return function, the return spring being cockable by the actuating movement, a clutch (3) between the electric drive (1) and the reduction transmission (2) and a brake device (4) operated in the spring return function. According to the invention, the brake device (4) is a centrifugal brake having a stationary drum (7) and a rotatably mounted brake shoe carrier (6) on which brake shoes (8) movable radially by centrifugal force are disposed. The brake shoe carrier (1) is the transmission-side clutch part and has a spindle (9) having at its end a pinion (10) engaging in the reduction transmission. The clutch input part (5, 11) is rotatably mounted on the spindle (9).
Cette invention concerne un actionneur de soupape à rappel par ressort pour systèmes de chauffage, ventilation et conditionnement d'air. L'actionneur comprend essentiellement un entraînement électrique (1), un réducteur (2) à ressort de rappel pouvant être armé par l'actionneur, un embrayage (3) entre l'entraînement électrique (1) et le réducteur (2) et un frein (4) qui se serre sur intervention du ressort de rappel. Selon l'invention, le frein (4) est un frein centrifuge à tambour fixe (7) et porte-segments de frein rotatif (6) dont les segments de frein (8) se déplacent radialement sous l'effet de la force centrifuge. Le porte-segments de frein (1) constitue l'élément d'embrayage côté réducteur et comporte un axe (9) portant à un bout un pignon (10) engrenant avec le réducteur. La partie menante (5, 11) de l'embrayage tourne sur l'axe (9).
Birchmeier Werner
Shapiro Cohen
LandOfFree
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