controls for flexibility of operation.]
2.9.1.3
Shed
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NOTE: Shed should be used in the severe climate
areas. Consult appropriate DM-2 series design
manuals for design criteria for the shed.
**************************************************************************
Provide shed of pre-engineered metal space frame construction with
corrugated siding as indicated. Provide ventilation with roof vents and
openings along bottom of sides of shed.
2.9.2
Top-Mounted Railroad Hopper Car Shaker
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NOTE: When noise is a major factor of concern,
design a shaker enclosure with acoustical treatment
which will be capable of reducing the noise to a
tolerable level.
**************************************************************************
Provide top-mounted rail car shaker complete with shaker, frame, vibrator,
motors, hoists, hoist frame, [enclosure], and controls. Design unit for
operation under all weather conditions.
2.9.2.1
Shaker
Shaker shall operate with a nominal 4 mm 5/32 inch stroke at 1200 rpm.
Stroke shall be generated by large eccentric SAE 1045 steel shaft mounted
in high capacity, self-aligning, spherical roller bearings. Seal bearings
with a double piston ring labyrinth seal and dust and water slinger to
retain lubricant and prevent entry of contaminants. Shaker frame shall be
stress-relieved, welded steel construction. Fabricate frame of heavy steel
plate, with bearing housing seats machined after stress relieving. Provide
four lifting eyebolts of heat-treated forged alloy steel for connecting to
hoist chains.
a.
Shaker Electric Motor and Drive: Motor shall be totally enclosed,
fan cooled, 1,800 rpm, [_____] volt, three phase, 60 Hz, not less
than 15 kW 20 hp, as specified under paragraph entitled "Motors
and Drives" in this section. Motor shall be mounted on heavy
spring isolated supporting frame with adjustable motor base.
Shaker shall be belt driven with special deep groove sheaves,
taper locking type hubs, and constant belt tensioning spring.
2.9.2.2
Shaker Hoist
Hoist shall be twin hook type having a rated capacity exceeding the weight
of the shaker unit. Hoist shall have a lift of not less than 7 1/2 meters
25 feet with a hoist speed of not less than 0.08 meter per second (m/s) 16
feet per minute (fpm). Hoist shall have not less than 460 mm 18 inch long
sling chains for connecting hoist to shaker lifting eyes, and hooks shall
have U-bolt safety latches. Hoist shall be mounted on an electrified
trolley as specified in Section 14637N CRANES OVERHEAD ELECTRIC
UNDERRUNNING UNDER 50,000 PUNDS.
Shaker Hoist Electric Motor:
Motor shall be totally enclosed, [fan
SECTION 15502N
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