PURPOSE

The steering gears are designed for operation and installation in single- and double rudders gears aboard ships of various purposes.

DESIGN

Electrohydraulic steering gears РМ160-2, РМ250-2 and РМ400-2 of standard size PM have similar design scheme:

  • Four-cylinder, power drive of ram-link-motion type with manual or automatic actuation of four cylinders (main operation mode) or two cylinders (separate hydraulic systems) with other two cylinders with a damaged pipeline being disconnected;
  • Three motor-driven pump units – two main units and one stand-by; main pump units can be installed on the power drive or separately; the stand-by unit is installed separately from the power drive;
  • Auxiliary hydraulic equipment;
  • Start-protecting and signaling electric equipment connected to ship’s mains, 3-phase a.c., 50 Hz, 380 V;
  • Local control system with indication of the steering gear parameters. Local control system is adapted to any digital system of upper level providing remote operation mode with such control types as “Automat”, “Follow-up”, “Non-follow-up”. Local operation mode includes such control types as “Follow-up” and “Non-follow-up”.

Parameter

РМ 160-2

РМ 250-2

РМ 400-2

Rated torque at rudder stock with rudder shifted to rated angle 35° on either side, kN•m

160

250

400

Time of rudder shifting from 35° on one side to 30° on other side, s, not more:

one pump unit in operation

two main pump units operate simultaneously

 

 

28

15

 

 

28

15

 

 

28

14

Rating of electric motor of the pump unit, kW

7.5

11

18

Mass of steering gear as delivered, kg

5000±250

6000±300

9000±400

Tiller bore in the way of rudder stock, mm:

cylindrical opening

tapered opening (К=1:15, dia. of taper base)

 

-

235

 

250; 310

-

 

-

350

Overall dimensions of power drive (without pump units), mm:

length

breadth

height

 

2420*

1900*

1100*

 

2880

1890

780

 

3400

2160

800

Overall dimensions of pump unit, mm:

length

breadth

height

 

1810

630

780

 

1790

835

1040

 

1840

740

895

* Overall dimensions of power drive with pump units

РМ 160-2 drawing

Electrohydraulic steering gears of PM type