A320飞机维护手册 AMM HYDRAULIC POWER 液压5(101)

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 The hyd ovrd pushbutton switch (identified as RAT/MAN/ON in the flight compartment) when operated connects the 28 V DC supply from HOT BUS 1, 701PP directly to solenoid 1.
 The elec ovrd pushbutton switch (identified as RAT & EMER GEN/MAN ON/AUTO in the flight compartment) when operated connects the 28 V DC supply from No. 2 BATTERY through circuit breaker 6XE to solenoid 2. At the same time the 28 V DC is supplied to the control unit of the CSM/G 8XE.
 6. Operation
_________
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 (Ref. Fig. 012)
R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 (Ref. Fig. 012A)

 Extended and Retracted Positions - Logic Diagram
 Figure 012

R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 36 1 1 Config-1 Aug 01/05 1 1 1CES 1

 Extended and Retracted Positions - Logic Diagram
 Figure 012A

R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 29-22-00Page 37 1301-399, 401-499, 1Config-1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 A. Retracted Position
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 (Ref. Fig. 013)
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 Post SB 29-1111 For A/C 001-049,051-061,101-105,201-203,
 (Ref. Fig. 013A)
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 In the retracted position, the RAT is in the RAT compartment with the doors closed. The leg assembly is connected to the doors and keeps them closed. The internal lock in the RAT actuator locks the RAT in the retracted position. The index lock mechanism on the leg locks the turbine blades so that they can not turn. The turbine blades are at maximum coarse pitch. A calibrated flow of warm oil from the high-pressure bleed in the GCM is supplied to the leg assembly and the pump.
 B. Not Applicable

R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 B. Retracted Position
 In the retracted position, the RAT is kept in the RAT stow compartment with the doors closed. The leg assembly has two links which are attached to the stow compartment doors and keep them closed. The internal lock in the ejection jack locks the RAT in the retracted position. The index mechanism on the leg assembly locks the turbine blades so that they can not turn. The turbine blades are at the fine pitch. A calibrated flow of warm oil is supplied to the leg assembly and the pump.
R 1EFF : ALL 1 29-22-00Page 38 1 1 Config-1 Aug 01/05 1 1 1CES 1

 RAT Retraction - Schematic
 Figure 013

R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 39 1 1 Config-1 May 01/05 1 1 1CES 1

 RAT Retraction - Schematic
 Figure 013A

R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 40 1 1 Config-1 May 01/05 1 1 1CES 1 **ON A/C 001-049, 051-061, 101-105, 201-203,

 Post SB 29-1111 For A/C 001-049,051-061,101-105,201-203,
 In the retracted position, the RAT is in the RAT compartment with the doors closed. The leg assembly is connected to the doors and keeps them closed. The internal lock in the RAT actuator locks the RAT in the retracted position. The index lock mechanism on the leg locks the turbine blades so that they cannot turn. The turbine blades are at maximum coarse pitch.
 B. Not Applicable
 **ON A/C ALL
 C. Extension
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 (Ref. Fig. 014)

R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 (Ref. Fig. 014A)
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 (Ref. Fig. 015) When the RAT gets a command to extend (from automtic or manual selection), one of the two solenoids operates and releases the retract lock. Spring pressure extends the actuator which extends the RAT into the airflow. The contacts of the stow limit switch close and send a signal to the ECAM system. The compartment doors open automtically as the RAT extends. The index lock mechanism disengages automatically when the RAT is 5 degrees from its fully extended position. The turbine can then start to turn.

 RAT Extension Logic
 Figure 014

R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 42 1 1 Config-1 Aug 01/05 1 1 1CES 1

 RAT Extension Logic
 Figure 014A

R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 29-22-00Page 43 1301-399, 401-499, 1Config-1 Aug 01/05 1 1 1CES 1

 RAT Extended and Operational - Schematic
 Figure 015

R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 44 1 1 Config-1 Aug 01/05 1 1 1CES 1 The turbine blades are in coarse pitch immediately after the RAT is extended. As the turbine starts, fluid flows from the outlet of the high-pressure pump through the flow-sensitive valve of the GCM to the low-pressure system. Thus the turbine can get to its operating speed before the full load of the hydraulic pump is applied. The gerotor pump supplies servo pressure as the turbine speed increases and the blade pitch angle decreases. The flow from the RAT pump increases and closes the flow-sensitive by-pass valve. At the same time a flow-sensitive valve in the leg assembly operates and stops the warm oil bleed.
　
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