Emcee 1004156, User Manual

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General Manual Electric Winches with UMPH rope-English Rev.1.1 – 10-12-2014
3. GENERAL DESCRIPTION OF WINCHES
3.1 GENERAL OPERATING PRINCIPLE
Pulling Winch:
A winch is a pulling winch when transporting a load in horizontal sense. If the wire
were to be cut during operation the load would stop moving.
Lifting Winch:
A lifting winch is any winch which moves a load vertically during part or all of its
operation. This may be directly vertical or up a slope. If the rope were to be cut during
any part of the operation, the load will move.
Fleet angle.
To allow the wire to spool correctly it is imperative that the wire comes off the drum at
a sufficiently low fleet angle. In the below table the minimal and maximal fleet angles
are given for plain and grooved drums. Higher fleet angles will result in excessive
wear, grinding noise and bad spooling. To obtain a correct fleet angle, line out the
products drum at a right angle to the wire, and centralize to the first sheave. A piece of
rope can be useful in determining the correct angle.
Plain drum
Grooved drum
1 layer cable only
Grooved drum
multi-layer spooling*
Min. Recom.
max.
Max. Min. Recom.
max.
Max. Min. Recom.
max.
Max.
Standard cables 0,5° 1,5° 2,0° 0° 2,5° 4,0° 0,5° 1,5° 2,5°
Rotating free cables 0,5° 1,2° 1,5° 0° 1,5° 2,0° 0,5° 1,5° 2,0°
* For spooling > 3 layers cable on a grooved drum the max. fleet angle should be limited to the values for a plain drum
Main components of EMCÉ winches
Motor:
The part delivering the torque for driving the load.
Brake:
The safety device delivering the torque opposite to the load when the motor is not feeded. The brake acts on the
input torque and normally features 1.5 times the driving torque. A further safety brake, directly acting on the
drum, can be delivered on request.
Reduction gear:
The part which multiplies the torque delivered by the motor to obtain the necessary torque to drive the load.
Drum:
The part which winds the rope. Use of a grooved drum smoothens spooling of the rope. Drum boundaries are
the flanges. For safety reasons the diameter of the flanges is equal to the outer diameter of the upper allowed
wire layer increased by two wire diameters.
Frame:
The structure which supports drum and other winch parts.
Main components of an SB series electric winch