E & VE Tech Specs0 pages

E and VE Construction
E Element
Type E and VE elements combine rugged design
and rigid construction features which make them
ideal for moderate to heavy duty clutch and
brake service. They are suited for medium speed
cyclic applications which are subject to large
thermal loads. When used with an air agitating
ventilated drum they provide excellent slip clutch
and tension brake service.
A neoprene rubber and cord tube is contained by
two side housings. Friction shoes are held in
position on the tube periphery by leaf springs
which pass through the shoe back plates and
side housings. The springs counteract
centrifugal force acting on the shoes and insure
shoe disengagement. Torque is transmitted by
torque bars which are held in position by the side
housings. Pressurizing the tube forces the
friction shoes to engage an inside drum
diameter.
The expanding design allows the element to
behave as a centrifugal clutch. The element’s
operating speed determines the spring force
required to retract the shoes upon tube exhaust.
When a large spring force is required, side
housings with reinforced spring slots are
furnished.
C-3
VE Element
The VE element differs from the E element in that
the VE side housings and friction shoe backing
plates have open construction and ventilating
features which permits a greater flow of cooling
air and greater heat dissipation.
Element torque is dependent upon the applied
pressure, release spring force and speed.
Catalog ratings are given at 75 psi (5,2 bar) and
zero rpm. Maximum recommended pressure is
125 psi (8,6 bar). Adjustment for operating
pressure, spring force and speed is explained
under Selection Procedure.
E elements are available in 10 sizes; VE elements
in 3 sizes. They are identified by the inside drum
diameter in inches to which they expand and the
width in inches of their friction lining. For
instance, size 16E475 is designed to expand to a
16 inch diameter drum and has a friction lining
width of 4.75 inches. The smallest E element will
expand to a 12 inch (305 mm) diameter drum
and the largest to a 40 inch (1016 mm) diameter
drum.
E elements are available with split side housings.
They are used in applications having limited axial
access for element maintenance. Butt end
actuating tubes are also available for
replacement purposes.
Where used:
•
Construction Equipment
•
Marine Winches
•
Metalworking Machinery
•
Slip Clutches
•
Tension Brakes
Two elements can be bolted to an adapter ring to
form a dual element having twice the torque
capacity of a single element.
Copyright Eaton Corporation, 1997, All rights reserved.