INTENTIONALLY BLANK
R 1 1
27-84-00Page 31
1 1 May 01/02 1 1 1CES 1
Torque Shafts and Steady Bearings - Details
Figure 017 (SHEET 1)
R 1EFF : 001-049, 051-061, 101-103, 201-203, 1 27-84-00Page 32 1 1 May 01/05 1 1 1CES 1
Torque Shafts and Steady Bearings - Details
Figure 017 (SHEET 2)
R 1EFF : 001-049, 051-061, 101-103, 201-203, 1 27-84-00Page 33 1 1 May 01/05 1 1 1CES 1
Torque Shafts and Steady Bearings - Details
Figure 017 (SHEET 3)
R 1EFF : 001-049, 051-061, 101-103, 201-203, 1 27-84-00Page 34 1 1 May 01/05 1 1 1CES 1
INTENTIONALLY BLANK
R 1 1
27-84-00Page 35
1 1 May 01/02 1 1 1CES 1
Torque Shafts and Steady Bearings - Details
Figure 017A (SHEET 1)
R 1EFF : 062-099, 104-149, 151-199, 204-299, 1 27-84-00Page 36 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
Torque Shafts and Steady Bearings - Details
Figure 017A (SHEET 2)
R 1EFF : 062-099, 104-149, 151-199, 204-299, 1 27-84-00Page 37 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
Torque Shafts and Steady Bearings - Details
Figure 017A (SHEET 3)
R 1EFF : 062-099, 104-149, 151-199, 204-299, 1 27-84-00Page 38 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
Actuators - Sectional View
Figure 018
R 1EFF : 001-049, 051-061, 101-105, 151-152, 1 27-84-00Page 39 1201-204, 1May 01/05 1 1 1CES 1R **ON A/C 062-099, 106-149, 153-199, 205-299, 301-399, 401-499,
(Ref. Fig. 018A)
**ON A/C 001-049, 051-061, 101-105, 151-152, 201-204,
(Ref. Fig. 019)
R **ON A/C 062-099, 106-149, 153-199, 205-299, 301-399, 401-499,
(Ref. Fig. 019A)
**ON A/C ALL
There are two types of actuator in each wing. Those on tracks 2 and 3 are larger in diameter and include more gearing than the other actuators. The assembly and operation is almost the same for all actuators.
Each actuator includes:
-
a cylindrical casing
-
a through shaft
-
a bidirectional torque limiter with latching indicator
-
a sun gear
-
a power output stage. (This includes a compound differential planetary arrangement of six planets, supported by rings)
-an output shaft which engages the track drive pinion.
The large diameter actuator has a first-stage reduction gear between the sun gear and the power output stage. The differential ratio across the power output stage provides the high torque/low speed operation of the actuators.
Grease fills the actuators for life-time lubrication. It is not possible to lubricate at regular times. Collected moisture drains through bleed holes in the casing. Pivoted cover plates over the bleed holes make sure that unwanted material does not get into the actuator. The cover plates turn to permit the removal of grease from the bleed holes. This helps the collected moisture to drain.
The torque limiter has:
-a ball ramp device with input and output members
Actuators - Sectional View
Figure 018A
R 1EFF : 062-099, 106-149, 153-199, 205-299, 1 27-84-00Page 41 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
Torque Limiter
Figure 019
R 1EFF : 001-049, 051-061, 101-105, 151-152, 1 27-84-00Page 42 1201-204, 1May 01/05 1 1 1CES 1
Torque Limiter
Figure 019A
R 1EFF : 062-099, 106-149, 153-199, 205-299, 1 27-84-00Page 43 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
-
a friction disc pack spline-mounted to release too much torque through the gearbox casing into the aircraft structure
-
a spring pack that is set to a limit of a minimum of 120% of the maximum torque for operation
-an indicator which a spring clip usually keeps in the retracted position.
The torque limiter stops the transmission of too much torque into the output. It also makes sure that the indication of torque peaks, which momentarily engage and release the torque limiter, does not occur.
(1) Operation
Power input to the actuator through-shaft moves the sun gear through the torque limiter. In the small diameter actuator, the sun gear transmits power directly to the power output stage. The power is then transmitted to the output shaft. In the large diameter actuator, the sun gear moves the power output stage through the first-stage reduction gear. When the torque necessary at the actuator output shaft is more than the load value of the torque limiter spring:
-
the output member of the ball ramp moves slowly, which causes the balls to move up the ramp
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