DECKMASTER
Table 2-1
POWER REQUIRED CONDITIONS
Theoretical Drive Train Analysis:
Winch Drum to Electric Motor
1.0
DRUM TORQUE
Pull = 10,000 lbs @ 66.25 inch radius (mid-layer)
Pulling Torque
= 10,000 x 66.25
= 662,500 in-lb
Brake = 18,000 lbs @ 66.25 inch radius (mid-layer)
Braking Torque
= 1,192,500 in-lbs
2.0
DRUM SPEED
Line Speed = 25 FPM @ 66.25 inch radius
Drum Speed = 0.721 RPM
3.0
REDUCTION GEAR SET
Special:
Ring Gear =
3 DP/200PA/181 Teeth/60.333 PD/
4 inch wide
Pinion Gear = 3 DP/200PA/15 Teeth/5.00 PD/
4 inch wide
Ratio: 12.066:1.0
Efficiency: hgs = 0.95
Required Input Torque = 662 500/12.066 (0.95)
= 57,796 in-lbs Pulling
= 104,033 in-lbs Braking
Required Input Speed
= 0.721 (12.066) =
= 8.70. RPM
4.0
REDUCTION GEAR BOX
Fairfield Torque Hub No. S6A1-33-32
Ratio: 32.31:1
Efficiency: hgb = 0.95
Required Input Torque
= 57,736 in-lbs/(32.31) (0.95)
= 1833 in-lbs Pulling
= 3,389 in-lbs Braking
Required Input Speed = 8.70 (32.31)
= 281.1 RPM
2-3
