-
the spring cup pushes the plunger
-
the indicator extends to show that a lock-out torque occured.
The indication of the lock-out torque occurs only:
-when hydraulic-power-given torque is released through the gearbox casing into the aircraft structure because of too much load downstream.
The system can be set again by operation in the opposite direction. The indicator stays extended until it is cancelled manually.
R **ON A/C 062-099, 106-149, 151-199, 204-299, 401-499,
(a) Operation
Input from the torque shaft is transmitted from the input bevel gear to turn the bevel gear shaft and the input gear through the ball ramp device. Output from the bevel gear shaft is transmitted through torque shafts to the line gearbox. Output from the input gear is transmmitted through the idler gear and the gear wheel assembly to the rotary acuator.
During usual operation, the bevel gear shaft, the input gear and the friction discs turn at the same speed. If the torque reaction at the rotary actuator is too high, it causes the input gear to turn more slowly than the bevel gear shaft. This difference in speed causes the input gear to move the balls up the ramps in the
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 27-54-00Page 49 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1 bevel gear shaft and the input gear. When this occurs, the input gear moves against the pressure of the spring discs. This compresses the friction discs against the earthed plates and causes the unit to lockout.
When the torque limiter is compressed, the thrust cup moves against the pressure of the spring discs. The thrust cup touches the plunger which extends the lockout indicator arm. This gives a visual indication that the torque limiter has operated. The indicator arm stays extended until it is pushed in manually to cancel the indication.
The system can be set again by operation in the opposite direction.
**ON A/C 301-399,
(a) Operation
Input from the torque shaft is transmitted from the input bevel gear to turn the bevel gear shaft and the input gear through the ball ramp device. Output from the bevel gear shaft is transmitted through torque shafts to the line gearbox. Output from the input gear is transmmitted through the double gear, the two idler gears and the input gear wheel assembly to the rotary acuator.
During usual operation, the bevel gear shaft, the input gear and the friction discs turn at the same speed. If the torque reaction at the rotary actuator is too high, it causes the input gear to turn more slowly than the bevel gear shaft. This difference in speed causes the input gear to move the balls up the ramps in the bevel gear shaft and the input gear. When this occurs, the input gear moves against the pressure of the spring discs. This compresses the friction discs against the earthed plates and causes the unit to lockout.
When the torque limiter is compressed, the thrust cup moves against the pressure of the spring discs. The thrust cup touches the plunger which extends the lockout indicator arm. This gives a visual indication that the torque limiter has operated. The indicator arm stays extended until it is pushed in manually to cancel the indication.
The system can be set again by operation in the opposite direction.
R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 27-54-00Page 50 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1 **ON A/C ALL
(3) Rotary Actuator - Track 1
**ON A/C 001-049, 051-061, 101-105, 201-203,
(Ref. Fig. 023)
R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
(Ref. Fig. 023A)
**ON A/C 001-049, 051-061, 101-105, 201-203,
Bolts attach the rotary actuator to the offset gearbox casing. The gearbox output shaft turns the rotary actuator. A first-stage gear train transmits input torque from the offset gearbox to the power stage of the actuator. The power stage includes nine planet gears held by rings. This gives an equal share of the load between the driven output carrier drive, and the earth annulus gear. The differential gear ratio between the planet gears, the earth annulus gear and the output ring gears gives a high torque/low speed output.
R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
The rotary actuator is held in the actuator housing of the offset gearbox with two countersunk screws. It is a reduction unit that gives a high torque/low speed output and has:
-
an input end-cover
-
an input gear (first stage sun gear)
-a short-flanged hub assembly which has a short-flanged hub and a rotating ring gear
-first-stage planet gears (three)
-an annulus gear assembly
-power-stage planet gears (six)
-
a fixed ring gear
- 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM FLIGHT CONTROLS 飞行操纵4(140)
