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Ladder hoisting winch, line pull 220 kN (Technical supply specification)


1. General Data (Operating Conditions)

The ladder hoisting winch remains fully operational under marine environmental conditions under:

  • Ambient temperature: -5°C to +35°C.
  • Minimum survival temperature (cold standby): -40°C.
  • Dredger operational design limits:
    • Wave height: up to 0.4 m.
    • Maximum wind speed: 8–11 m/s.
    • Current velocity: up to 1 m/s.

2. Purpose

The ladder hoisting winch is designed for lifting and lowering the dredging ladder to ensure precise digging depth control.

Ladder hoisting winch, line pull 220 kN – General arrangement drawing, top view
Ladder hoisting winch, line pull 220 kN – General arrangement drawing, top view

About

Purpose and Operational Role

Precise tool control is critical for efficient dredger operations. The ladder hoisting winch fulfills this function by providing vertical movement of the dredging ladder. Control of the digging depth depends directly on winch reliability and smooth operation, which directly impacts overall system productivity.

Reliability as the Core of Long-Term Operation

The ladder hoisting winch design is engineered for continuous high loads under high-humidity and high-vibration conditions. Reliable braking systems and protected drives guarantee safe holding of the ladder in any position. Izhora Hydrosystems LLC manufactures this equipment, balanced for heavy-duty strength and precision, to deliver solutions for demanding projects.

Smart Control for Safe Operation

Modern ladder hoisting winches are equipped with automated control systems. Sensors monitor key parameters: depth, rope tension, and limit positions. This configuration increases operational precision and enables automatic shutdown in emergency situations, preventing accidents and protecting high-value dredger assets.

The Right Choice for Performance

Selecting an advanced ladder hoisting winch ensures uninterrupted and profitable dredging operations. The winch serves as an intelligent node within the process chain, where every component must deliver peak performance. Our company focuses on engineering these reliable and efficient solutions to support clients in reaching their operational targets.


3. Scope of Supply

3.1 Ladder Hoisting Winch, Line Pull 220 kN

3.1.1 Bill of Materials

ComponentQuantity
Ladder hoisting winch assembly, comprising:1 pc.
– Reversible electric motor, approx. 90 kW, with RTDs1 pc.
– Cylindrical gear reducer1 pc.
– Drum, 200 m rope capacity1 pc.
– Band brake1 pc.
– Shoe (electromagnetic) brake on drive shaft1 pc.
– Remote-controlled freewheel clutch1 pc.
– Spooling device (disconnectable)1 pc.
– Slack rope sensor1 pc.
– Payout length sensor1 pc.
– Cooling fan (if required)1 pc.
– Anti-condensation heater (if required)1 pc.
Control cabinet with integrated soft starter*1 pc.
Local control station**1 pc.
Remote control station***1 pc.
Rope 29.0–Г–Ж–Н–Р–1670 per GOST 3069–80 (length 250 m)1 pc.
Ladder hoisting winch, line pull 220 kN – General arrangement drawing, side view
Ladder hoisting winch, line pull 220 kN – General arrangement drawing, side view

3.1.2 Main Parameters

ParameterValue
Rated pull on top layer≈220 kN
Nominal rated pull on outer layer220 kN
Hauling speed≈12 m/min (nominal 12.5 m/min)
Speed controlVFD / soft starter
Drum rope capacity200 m
Number of rope layers2
Drum diameter (min.)min. 18 × rope diameter
Electric motor powerapprox. 90 kW (nominal 55 kW)
Electric motor duty cycleS1 (continuous duty)
Electric motor and brake power supply3×380 V, 50 Hz
Electric motor protection classIP56
Climatic executionOM1
Gearbox typeCylindrical
Rope per GOST 3069–8029.0–Г–Ж–Н–Р–1670
Rope safety factor2
Static brake holding loadmin. 330 kN
Rope spooling directionUnderwound

3.1.3 Spare Parts, Tools and Accessories (SPTA)

The scope of spare parts, tools, and accessories shall be agreed upon with the customer.

3.1.4 Documentation

DocumentQuantity
Product data sheet (Passport)1 copy
Operating manual1 copy
Electrical schematic diagram1 copy
Warranty certificate1 copy

3.1.5 Certificates

Material certificates and product data sheets for the wire rope are included in the scope of supply.


4. Additional Requirements

  • Operating Duty and Braking System: The electric motor supports continuous, intermittent periodic, and short-time duty cycles without overload. The drive shaft brake provides fail-safe braking upon power loss and guarantees positive drum holding under a static rope load of no less than 330 kN.
  • Control Equipment: The winch is equipped with RTDs to protect motor windings against overheating. If required, a cooling fan (power supply 380V, 50Hz or 220V, 50Hz) and an anti-condensation heater are provided.
  • Control Cabinet Functions: The control cabinet provides:
    • Motor overload protection via circuit breaker.
    • Motor reversing and starting current reduction via soft starter.
    • Automatic winch shutdown upon slack rope detection and maximum ladder lift.
    • Signal processing from the slack rope sensor, maximum ladder lift limit switches, and depth position indicator.
    • Control of motor shutdown, cooling fan, and anti-condensation heater.
    • Power supply distribution to all winch-mounted equipment.
    • Control mode selection (local / remote).
    • Signal processing from RTDs and motor overheating protection.
    • Status indication for control cabinet power, motor power, and active control mode.
    • Connectivity for remote control equipment, local emergency stop switch, and wheelhouse ammeter.
    • Interlock to prevent electric motor operation if the cooling fan is deactivated.
  • Remote Control Station Functions: The remote control station provides:
    • Motor start/stop and reversing.
    • Brake release and emergency stop.
    • Status indication for power supply and operating mode (pay-out/haul-in).
    • Monitoring of motor current, payout length, hauling speed, slack rope, and ladder depth position.
    • The station is available in two structural configurations: free-standing (IP22 protection class for dry spaces) or console-mounted (for integration into the vessel bridge console).

5. Manufacturer

Izhora Hydrosystems LLC


6. Warranty Period

12 months from the date of shipment, unless otherwise specified by the contract.


Contacts

Phone: +7 (812) 339-61-68

Email: contact@i-hydro.tech