Port Equipment .

Heavy two- and three-stage parallel-shaft gearboxes with a double-helical (herringbone) output stage. Output torque 250–600 kN·m at drive ratings of 800–1,500 kW. CGC ZSY/JST series with split-power transmission are a good fit — they reduce overall envelope at the same rated power and ensure even load sharing between gear meshes. Marine-coated housing, forced circulation lubrication, separate-foundation air-to-oil cooler.

• Gear ratio 20–63
• Output torque 250–600 kN·m
• Service factor ≥ 2.0
• Anti-corrosion coating C5-M (ISO 12944)
• Forced lubrication with 10 µm filtration
• Bearing temperature monitoring via Pt100

Boneng helical-bevel K-series or parallel-shaft F-series gear-motors — compact mounting on the bogie without a remote motor. Each STS crane wheel has a dedicated gear-motor to prevent rail slip under wind loading. Precise trolley positioning requires VFD operation with an encoder and a gearbox with low output-shaft backlash.

• K-series (90° helical-bevel) or F-series (parallel-shaft)
• Gear ratio 25–125
• Output-shaft backlash ≤ 6 arc-minutes
• Provision for a shaft-end encoder
• Marine-grade IP66 execution
• Reinforced bearings for radial loads

The slewing platforms of ship loaders and grab unloaders are equipped with planetary gearboxes of high reduction ratio. The luffing drive combines a parallel-shaft gearbox with a brake drum and a compensating hydraulic cylinder. Continuous S1 duty at bulk-handling rates of 1,500–6,000 t/h requires thermal verification of the housing and forced oil cooling.

• Gear ratio 100–315
• Output torque up to 1 MN·m (platform slewing)
• Service factor ≥ 1.8
• Oil cooler with a closed seawater loop
• Redundant lubrication system

General-purpose gear-motors for conveyors handling grain, coal and ore. Long conveyors (300–1,200 m) carry several drive stations per belt with even torque distribution. A heavy start under full load requires SF ≥ 1.5 and a thermal check. On inclined sections a backstop is mandatory to prevent the belt from running backwards on power loss.

• K-series or R-series (in-line)
• Service factor ≥ 1.5
• Backstop mounting option
• Dust and water ingress protection IP66
• Twin-drive operation with torque balancing

Rubber-tyred RTGs and rail-mounted RMGs at container terminals are equipped with gear-motors on every gantry wheel and on the trolley. Gantry travel requires precise synchronous control of all wheel drives through closed-loop VFDs — otherwise the gantry skews on uneven pavement. The Boneng HB series is designed for continuous duty in container-terminal conditions.

• Individual drive on each wheel
• Synchronization via CAN or PROFIBUS
• Marine-grade C5-M execution
• Inverter-duty compatibility
• PTC thermal protection in the winding

Induction motors rated 600–1,500 kW with forced water or air cooling IC81W. The container-handling duty cycle calls for up to 35 working cycles per hour with a starting torque of 1.8 times rated. Wolong WD3000 motors are a good fit, with a 4,096 ppr encoder and thermal reserve for S4 duty. The winding is impregnated with moisture-resistant varnish, with mandatory Pt100 RTDs in every phase and in both bearing shields.

• Rating 600–1,500 kW, voltage 660/1,000 V
• Insulation class H, NEMA MG1 Part 31 (inverter-duty)
• Encoder resolution ≥ 4,096 ppr
• Insulated bearing on the coupling end
• Forced cooling, IP55
• Thermal reserve for S4 — 40 cycles per hour

Induction motors rated 30–110 kW with a brake integrated into the rear shield. Used on every gantry wheel and on the trolley winch. Marine-grade execution is mandatory — the motors are exposed outdoors to direct salt fog. Wolong YE3/YBX3 series are offered in IP66 with stainless fasteners.

• Ingress protection IP66, marine-grade
• Integrated DC brake
• Anti-corrosion housing coating
• PTC thermal protection in the winding
• Inverter-duty compatibility

Regenerative VFDs with an active front end (AFE) for main hoist and travel duty. They return up to 95% of the container-lowering energy to the grid, which matters economically — over a shift, every second lowering carries a loaded container and every second a returning empty spreader, and in both cases the braking energy can be reused. INVT GD350-Crane and Inovance MD500-Crane series carry certified software modules for STS, RTG and ship-loader applications with ready-made control macros.

• AFE regenerative module (energy returned to the grid)
• Certified crane macros (STS, RTG, ship loader)
• Four-quadrant control
• Encoder compatibility
• Mains dip ride-through 200 ms

Continuous S1 duty at 75–315 kW. The motors operate amid bulk-handling dust and salty humidity. IP66 execution with additional bearing-housing protection against dust ingress. Inclined conveyors require either a brake motor or an external electromagnetic brake to prevent reverse motion.

• IP66 with additional bearing protection
• Continuous S1 duty at 100% load
• Anti-corrosion coating
• Soft-starter or inverter starting capability
• Insulation class F with class B temperature rise

Huawu YPZ2/YWZ5 series electrohydraulic disc brakes on the main-hoist winch drum. A dual-brake arrangement is used: a service brake (released by oil pressure, applied by springs) and an emergency brake with an independent hydraulic power unit. On power loss both brakes engage automatically within 0.15 s, holding the container at any point of the lift. Marine-grade execution with anti-corrosion coating and stainless cylinder rods.

• Braking torque margin 1.75–2.0 over rated
• Engagement time on power loss ≤ 0.2 s
• Dual-brake arrangement (service + emergency)
• Marine-grade execution, salt-fog protection
• Pad wear monitoring

CWZ rail clamps are mounted on the gantry of STS cranes and RTG/RMG units. They engage automatically on the anemometer signal when wind speed exceeds the setpoint (typically 20 m/s — out-of-service mode; 28 m/s — mandatory clamping). On mains power loss the clamps engage from a dedicated UPS. They hold the crane under gusts up to 35 m/s with a 1.5 safety factor. It is a port-critical system — without it the crane can be driven down the rails by a gust and destroyed.

• Hold-down rated for winds up to 35 m/s
• Anemometer-triggered actuation (20/28 m/s setpoints)
• UPS backup for 4 hours
• FEM/CE certification
• Marine-grade, stainless steel
• Pneumatic release for maintenance

SB shoe-type storm brakes with increased clamping force and ceramic linings. Used on ship loaders, grab unloaders and portal cranes at open berths. Fully sealed enclosure with salt-corrosion protection and zinc-coated fasteners. Engagement time 0.5–1.5 s, sufficient for storm protection during downtime.

• Hold-down force rated for winds up to 35 m/s
• Shoes with ceramic linings
• Zinc-coated fasteners, Zn 12 µm
• IP66, marine-grade
• Compatibility with port control systems

TKT/TKK shoe brakes with an electrohydraulic thruster for inclined coal, grain and fertilizer conveyors. They hold the belt on shutdown and prevent reverse motion under load weight. On long conveyors a combined arrangement is used: a main brake on the low-speed shaft and a backstop on the high-speed shaft for additional protection.

• Electrohydraulic thruster Ed-50–Ed-301
• Marine-grade shoes and springs
• Manual release option
• Pad wear monitoring
• Compatibility with a shaft-mounted backstop

Yongjing GIICL / Longxuan WGZ double-engagement gear couplings transmit torque from the motor through the gearbox to the winch drum. The crowned tooth profile accommodates angular misalignment up to 1°, which matters for the long drum spans of an STS hoist. Marine-grade execution with protection against grease wash-out by salt moisture — labyrinth seals and heavy grease with a 6-month service interval.

• Torque 100–600 kN·m
• Angular misalignment up to 1°
• Marine-grade execution, stainless fasteners
• Labyrinth seals
• Balancing grade G6.3

Combined couplings with an integrated brake drum for travel, slewing and auxiliary winch drives. They save space in the confined geometry of the crane structure and simplify service — the brake and coupling are removed as one assembly. Torque 5–125 kN·m, polyurethane pin-and-bush elements damp shock loads on start-up.

• Torque 5–125 kN·m
• Integrated brake drum
• Polyurethane elastic elements
• Marine-grade execution
• Elastic-element service life ≥ 30,000 h

YOX/COX fluid couplings provide a soft start for long quay conveyors under full coal or grain load. Rated slip of 2–3% protects the motor against overload if the belt jams. A fusible plug rated 145–160 °C dumps the oil on overheat and automatically shuts down the drive. On multi-drive conveyors fluid couplings also balance torque distribution between drives.

• Rated slip 2–4%
• Fusible plug rated 145–160 °C
• Marine-grade housing
• Thermal reserve for 4–6 starts per hour
• Optional safety valve

Power to the STS trolley and the RMG bridge is supplied through trolley busways along the span or through a motor-driven cable reel. The main-hoist cable reel winds 80–120 m of 4 × 95 mm² power cable, maintaining constant tension through a spring or electric drive. Contact trolleys carry currents up to 1,000 A as the trolley travels. The Anneng series is designed specifically for port conditions — IP66, marine-grade, salt-corrosion-protected.

• Cable-reel power capacity up to 1,500 kW
• Winding length 50–120 m
• Power-cable cross-section up to 4 × 120 mm²
• Marine-grade IP66
• Compatibility with the trolley VFD control system

NJZ/NB backstop couplings are installed on the low-speed shaft of an inclined-conveyor drive station. They prevent reverse belt motion on drive shutdown — without them a 600 m conveyor with 800 t of coal in transit would run back and tear out the take-up. Marine-grade execution with seals against salt fog.

• Holding torque 50–500 kN·m
• Mounted on the low-speed shaft
• Marine-grade execution with labyrinth seals
• Self-lubricating design
• Compatibility with the conveyor brake