EW Electric Open Winches

Product Detail

1.Trolley frame structure

A robust, precision-machined trolley frame meets the most stringent quality standards. Fatigue analysis of the structure has led to a unique design of the machinery support arrangement that eliminates internal stresses.

2. Optional rope guide

A rugged rope guide ensures proper rope winding on the drum. Adjustable upper and lower limit switches are actuated by the rope guide. Process limit switches can be easily added.

3. Load sensor

Direct measuring from the load beam provides reliable data for safety systems and maintenance monitoring.

4. Redundant rope reeving

Hoists are double-reeved using two separate ropes, from 2 parts to 16 parts depending on capacity. Ropes are selected according to FEM standards. Elimination of reverse bends minimizes rope wear. Stable positioning of the load is attained with true vertical lift. Accessible rope dead ends allow the two ropes to be easily adjusted and replaced.

5. Upper safety limit switch

An additional counterweight type emergency limit switch is a common option for process duty. The limit is actuated by the hook block and can be reset manually or (optionally) automatically.

6. Rope drum bearings

Two high-capacity ball bearings support the drum at the gearbox end. At the opposite end, a non-rotating shaft supports the drum through a self-aligning roller bearing in the drum through a self-aligning roller bearing in the drum end flange. This unique arrangement eliminates drum shaft fatigue failures.

7. Heavy duty brakes

EW Winches are normally equipped with heavy duty electro-magnetic disk brakes. Brakes are connected directly to the motor shaft. Safe closure is attained by spring force, ensuring operation of the brake during power failure. A second safety disc type brake or (optionally) a shoe brake can be added if required.

8. Traversing machineries

A hollow shaft gearbox is mounted directly onto the trolley drive axle. The primary end of the gearbox is supported by a flexible shock-absorbing torque arm. A wide range of flange-mounted motor types is available. 

9. Bogie construction

Bogie trolley wheel construction allows better distribution of loads to wheels and cranes girders. In the EW 700-1 100 range, a six-wheel bogie construction results in a lighter bridge structure, less fatigue, less wear and longer life.

10. Motors

Eurocrane electric crane motors are specially designed for heavy duty hoisting applications. The hoist motor sizes for Variator LM frequency controls range from 15 KW to 132 KW and for ACE thyristor controls from 15 KW to 90KW.

The modular construction of EW Winches allows either one or two main hoist motors to be combined on the same machine, using a differential input shaft. Alternatively, a separate micro-speed machinery(100% ED) is available.

All motors are IEC standard flange-mounted, with class F insulation. The protection class may be either IP54 or IP55 depending on the site requirements.

11. Hoisting gears

Gears are helical, carburized and hardened to 60RC, precision-ground to DIN7 (AGMA 10) quality, and are oil bath lubricated. Very large capacity EW 1000-1100 Winches have a planetary final reduction step.