-a ball ramp device
-five earthed plates
-six friction discs
-a group of eight spring discs
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-
a thrust cup
-
a group of six spring discs
-
a lockout indicator.
The ball ramp device gives axial movement of the hub when the bevel gear turns at a lower speed than the input shaft. The device is a coupling made by three balls. These are installed between the hub and the input shaft in machined grooves (ramps).
The earthed plates and the friction discs are installed on the hub. The spring discs and the thrust cup are installed on the input shaft.
The lockout indicator gives a visual indication that the torque limiter has operated. It has a lockout indicator arm and a plunger. These are operated by movement of the thrust cup.
(a) Operation
Input from the torque shaft is transmitted through the input
shaft to turn the bevel gear through the ball ramp device.
Output from the bevel gear turns the pinion shaft which operates
the bevel gear assembly and the rotary actuator.
Output from the input drive shaft is transmitted through torque
shafts to the actuator at track 4.
During usual operation, the input shaft, the hub, the bevel gear
and the friction discs turn at the same speed. If the torque
reaction at the rotary actuator is too high, it causes the bevel
gear to turn more slowly than the input shaft. This difference in
speed causes the hub to move the balls up the ramps in the input
shaft and the hub. When this occurs, the hub 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.
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(3) Rotary Actuator - Track 3 (Ref. Fig. 023A) The description and operation for the track 3 rotary actuator is the
same as that for the rotary actuator at track 1.
**ON A/C ALL
J. Actuator Track 4 6233CM(6283CM)
**ON A/C 001-049, 051-061, 101-105, 201-203,
(Ref. Fig. 004) R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
(Ref. Fig. 004A)
**ON A/C 001-049, 051-061, 101-105, 201-203,
(Ref. Fig. 028) R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
(Ref. Fig. 028A)
**ON A/C 001-049, 051-061, 101-105, 201-203,
The actuator is almost the same as the actuator for track 1. The differences are:
-in the offset gearbox are bevel gears as an alternative to spur gears
-attached to the gearbox casing is the APPU. Included in the offset gearbox is a spur gear to turn the APPU.
Offset Gearbox - Track 4
Figure 028
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Offset Gearbox - Track 4
Figure 028A
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R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
The actuator is an assembly that has:
-an offset gearbox
-a rotary actuator.
(1) Offset Gearbox - Track 4
The offset gearbox has:
-an actuator housing
-
a gear housing
-
a bevel gearbox
-
a torque limiter housing
-
a torque limiter.
The actuator housing is a machined casting which contains the rotary actuator.
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本文链接地址：A320飞机维护手册 AMM FLIGHT CONTROLS 飞行操纵4(143)
