DQ Marine
ISO 9001-2008 Company | 7x24Hrs Service
Shipbuilding Equipment,Machienry and Consumables Supplies
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Srandard rudder propeller
Category:
Marine Propellers
Certificate:
ABS,LR,BV,DNVGL,NK,KR,IRS,RMRS,CCS
FOB Price:
Get Latest Price Now
Warranty:
12 Months unless specified otherwise
Place of Origin:
China
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We can supply according to your requirement.
Srandard rudder propeller:
Srandard rudder propeller

The rudder propeller replaces the traditional rudder and propeller combination propulsion mode with the combination of paddle and rudder. The rudder propeller body can be rotated 360° in any direction in the horizontal plane, which can provide all-round thrust and maximize the maneuverability of the ship.

Technical Specification

Type RP20 RP42 RP85 RP168
Maximum input power(kw)
HP
45 100 210 300
61 135 285 400
Maximum input torque (Sf=1) 200 420 850 1675
Maximum input speed 2300 2500 2350 2000
Reduction ratio 1.93 2.5 2.68 3.46
Ⅰ up 1.7 1.64 1.65 1.53
Ⅰ down 1.13 1.52 1.62 2.26
Propeller diameter Max. 500 800 950 1150
Min. 700 900
PAL length* Max. 2250 2800 2800 4250
Min. 350 875 980 1400
Weight (including paddles, oil, and PAL minimum) 65 190 300 1370
PAL adds weight(kg) for every 100mm increase 8 9 20.4 40

PAL is the vertical distance of the centerline of the propeller centerline propeller centerline.
The ability of the rudder propeller to transmit power is determined by the maximum input torque of the rudder propeller. The use of the rudder propeller, the type of prime mover and the type of ship may affect the actual input torque. Please consult with our technicians before selecting the rudder propeller model. The rated output torque Mp of the prime mover (usually a diesel engine, hydraulic motor or electric motor) is an important parameter for the correct selection of the rudder propeller. The calculation formula is as follows:
Mp≤Sf·MR

Mp=
Sf=fz×fl×fo×fs
Mp: prime mover output torque
Sf: Rudder safety factor
MR: Rudder input torque
N: prime mover output power
N: rudder paddle input speed

Each rudder propeller has its specific allowable design torque as required by the usual work safety factor. According to our many years of work experience, this design torque can not be used as the final basis in the selection of the rudder paddle, but must be carefully considered for a variety of service conditions. Therefore, the usual torque design safety factor Sf must be selected as follows:
The safety factor of the rudder propeller of our company. generally meets the requirements of the normal navigational regulations of the classification society. The safety factor for rudder propellers with ice reinforcement should be between 0.33-0.67. Please inform our company for the selection of the rudder slurry with special installation requirements.

RP280 RP330 RP550 RP1470 RP1950
480 620 920 1250 1650
650 843 1250 1700 2244
2800 3300 5423 14740 19500
1800 1800 1800 1000 1000
3.96 4.04 5.059 3.257 3.58
1.63 1.53 1.647 1.286 1.286
2.43 2.64 3.071 2.533 2.79
1550 1500 1800 2100 2300
1250
4750 5000
1750 1700 2600 2800 3000
2100 2800 5820 11000 16500
40 45

Sf = 0.75: continuous operation for 24 hours at full power (eg container ship, push boat, etc.)
Sf=0.90: The gap is fully loaded (such as the port for tugboats, floating cranes)
Sf=1.00: auxiliary devices (such as lateral propulsion, dynamic positioning, etc.)

FZ Annual working hours
1 Less than 3000 hours
0.95 From 3000 hours to 5000 hours
0.9 More than 5000 hours
FL Load condition
1 Intermittent load
0.95 Less than 50% full load
0.9 Continuously loaded
FO Overload condition
1 Host is not overloaded
0.95 Host overload 10%
0.9 Host overload greater than 10%
FS Work area
1 Dynamic positioning
1 Inland waterway
0.95 Inland waterway with water depth restrictions
0.95 Coastal limited area work
0.9 Infinite navigation work


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Tel: 0086-23-68428422/68428422/68428422

Fax: 0086-23-68428422/68428422/68428422

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