codge cst controled start transmision system

8/11/2019 Codge CST Controled Start Transmision System

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Unique Features of DODGE CST ReducersAssure Performance-Proven Advantages

HEAVY LOAD SURGES EXPERIENCED BY TYPICAL DRIVES

CSTAIR FLOW

COOLING PUMPAND MOTOR

MAINMOTOR

HYD. PUMPOIL

FROM CST

BEARINGLUBE

HYDRAULICCONTROLS

AIR TO OILHEAT EXCHANGER

COOLED OILBACK TO CST

4

4

2

1

2

3

5

How CST WorksCST is a multi-stage gear reducer with an internal clutch.

It is designed for the smooth starting of high-inertia loads

on long conveyor belts. Its major parts are a reducer gearassembly, internal clutch, oil cooling system, hydraulic

system, and Programmable Logic Controller (PLC).

Motor rotation is transmitted to the sun gear viathe helical input gears.

Sun gear engages the planet pinions.

Ring gear/brake ring rotates in absence of pressureto the annular piston.

Friction plates rotate with the ring gear/brake ring(an opposing plate separates each friction plate).

Force (on the plates) is controlled by hydraulic

pressure on the annular piston. Pressure causes the piston to extend from the

piston housing.

Output shaft is fixed due to resistance from theconveyor load.

Piston receives control pressure compressing the clutch pack.

Ring gear/brake ring rotation slows as the output shaft begins to turn and the conveyor belt moves.

Transmission of motion and torque from the motor to the CST output shaft can be precisely controlled.

Performance and Productivity Advantages Clutch pack in the output section absorbs shocks and protects the motor,

gearbox, bearings, belt idlers, pulleys, and splices. On multiple drives systems, motor kW load share is done within +/-2% to

minimize the loads and stresses on all the conveyor components.

CST offers extended acceleration and deceleration of the conveyorbelt with any load condition, as dictated by dynamic analysis.

Modular, flexible, PLC-based control system is supported byRockwells worldwide customer service centers.

SPEED

MOTOR 1 kW

MOTOR 2 kW

CST2 CLUTCH PRESSURE

CST1 CLUTCH PRESSURE

LOAD SURGES DAMPENED WITH CST CLUTCH PERFORMANCE


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System FeaturesControlled Acceleration and Deceleration Ramps

Parabolic starting curves

Adjustable acceleration times

Deceleration (not braking) ramps

Multiple Starting Duty

Cooling system designed for repeated starts Main motor may be left running between starts

Inspection Speeds

System BenefitsPower Grid

Minimizes voltage drops via sequenced motor starts kW demand reduced by unloaded motor starts

Motor

No load starts

Frequent motor starts eliminated

Gearing

Protected from shocks by clutch Efficient planetary design

Conveyor Components

Hydro-viscous clutch located at output of the CSTabsorbs transient shocks

Parabolic acceleration ramp minimizes belt andpulley stresses

Complete Project CapabilitiesDODGE

CST gearbox

Flywheels

Pulleys

Bearings Couplings

Ezlink vibration/temperature monitor

Reliance Electric

Motors

Allen-Bradley AB-PLC in industrial or mine-duty enclosures Panelview Touch Screen graphics

Datahighway DH+, DH485, and DeviceNet connectivity

DODGE CST DrivesImprove EfficiencyandPromoteLong Life withHigh Availabilityof Complete Conveyor System

kW

80

%O

FFULLSCALE

480

10

20

40

30

50

60

70

TIME (sec)

108

90

100

168Dwell time

Pressure

Belt speed

DODGE CST DRIVE

DODGEconveyor pulley

Torque limiting& torque control element

Reliance motor


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Rugged housings feature fabricated

steel construction and full thermal

stress relief prior to machining.

Heavy-duty spherical bearings

assure maximum load carrying

capacity and long life.

Internal clutch provides compact drive unit.


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Standard, grease-purged, Taconite

seals keep contaminants out in

the harshest mining environments.

Temperature sensor RTD monitors sump

oil temperature for optimum performance.

DC speed sensor provides accurate

signals for a smooth start.

Carburized gearing is ground to AGMA Level 11-12.


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codge cst controled start transmision system

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