Steering Gear

: http://dlmarine.com/3-1-rotary-vane-steering-gear/index.html

Through our R&D efforts, the rotary vane steering gear eliminates the problem of internal leakage which plagues many hydraulic steering gears. Our marine steering gears, approved by CCS, BV, etc., are widely used accessories for a number of different vessels. With high maneuverability, the rudder angle of the rotary vane hydraulic steering gear for ships has a maximum range of ±65°. The rated torque can be obtained at any rudder angle to ensure sufficient maneuverability in narrow wharf areas.

Features of the Rotary Vane Steering Gear
1. Compact, taking up little floor space.
2. Wide rudder angle range, up to ±65°.
3. Easy installation for all kinds of rudders. No need of rudder bearing.
4. Good sealing performance with rudder deviation speed less than 0.5°/min.
5. Low noise and good impact resistance.

Compared with rotary vane steering gears from other Chinese steering gear manufacturers, our product has the following advantages
1. High reliability: Even after 3,000 hours of continuous reliability test, no failures occurred.
2. Environmental adaptability: Results from both the environmental test and the electromagnetic compatibility test met the requirements of GJB150A-2009 standards.
3. High performance and low internal leakage. Leakage volume is half that of industry standards and the products mass is 85-90% of industry standards, leading to low heat generation and high efficiency.

Technical Data of the Rotary Vane Steering Gear
Rated torque: 10~900 Kn.m
Dia. of rudder stock: Ø80~Ø430 mm
Max. rudder angle by electric: ±35°, ±45°,±65°
Max. rudder angle by machinery: ±36.5°, ±46.5°,±66.5°
Time from -35° to 30°, ≤28s by one pump; ≤14s by two pumps
Time from -45° to 40°, ≤25s by one pump (for river);
Max. working pressure: 5~8 MPa
Set pressure of safe valve: 6.25~10 MPa

Hydraulic power unit (HPU)
Rudder actuator
Hydrodynamic test system of steering gear

Technical Parameters (rudder angle ±35°)

Rudder actuator	Working Torque(kN.m)	Max. rudder stock diameter(mm)	Diameter (mm)	Height (mm)	Max. radial load(KN)	Max. axial load(KN)
YDZ20/2	20	Φ180	囗470×470	340	260	130
YDZ25/2	25	Φ180	囗470×470	420	260	130
YDZ31.5/2	31.5	Φ180	囗470×470	420	260	150
YDZ40/2	40	Φ180	囗470×470	480	260	150
YDZ50/2	50	Φ180	Φ730	400	350	150
YDZ63/2	63	Φ180	Φ730	400	350	150
YDZ80/2	80	Φ180	Φ730	480	350	150
YDZ100/2	100	Φ230	Φ810	580	350	240
YDZ125/2	125	Φ230	Φ810	620	350	240
YDZ160/2	160	Φ280	Φ920	610	850	360
YDZ200/2	200	Φ305	Φ1045	660	900	450
YDZ250/2	250	Φ305	Φ1045	660	900	450
YDZ320/2	320	Φ305	Φ1045	780	900	450
YDZ400/2	400	Φ360	Φ1250	800	1500	560
YDZ500/2	500	Φ360	Φ1250	800	1500	560
YDZ630/2	630	Φ360	Φ1250	920	1500	560
YDZ800/3	800	Φ390	Φ1480	1020	2300	605
YDZ1000/4	1000	Φ450	Φ1700	1130	2900	700
YDZ1250/5	1250	Φ450	Φ1700	1230	2900	700

Technical Parameters（rudder angle ±65°）

Rudder actuator	Working Torque(kN.m)	Max. rudder stock diameter(mm)	Diameter (mm)	Height (mm)	Max. radial load(KN)	Max. axial load(KN)
YDZ16/2	16	Φ140	囗470×470	400	260	130
YDZ20/2	20	Φ140	囗470×470	400	260	130
YDZ25/2	25	Φ140	囗470×470	460	260	130
YDZ31.5/2	31.5	Φ180	Φ730	420	350	150
YDZ40/2	40	Φ180	Φ730	420	350	150
YDZ50/2	50	Φ210	Φ820	580	350	150
YDZ63/2	63	Φ210	Φ820	580	350	240
YDZ80/2	80	Φ210	Φ820	550	350	240
YDZ100/2	100	Φ280	Φ820	620	850	360
YDZ125/2	125	Φ280	Φ1045	660	900	450
YDZ160/2	160	Φ280	Φ1045	660	900	450
YDZ200/2	200	Φ280	Φ1045	750	900	450
YDZ250/2	250	Φ305	Φ1050	620	1000	450
YDZ320/2	320	Φ305	Φ1050	750	1000	450
YDZ400/2	400	Φ360	Φ1250	900	1500	560
YDZ500/2	500	Φ390	Φ1480	900	2200	605
YDZ630/2	630	Φ390	Φ1480	900	2200	605

We offer customized specifications.

Schematic diagram for rudder actuator

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