Dodge FLEXIDYNE 75D Kullanım Kılavuzu - Sayfa 2

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START-UP

Remove the filler plug and install the proper amount of flow

charge specified in Table 1. Replace and tighten filler plug,

making sure that no flow charge is trapped in threads. Torque

filler plug to 35 inch-pounds.

Attach AC ammeter (conventional clamp-on or equivalent) to

one line of the AC motor. Set range to cover 200% of motor

nameplate current.

Note the maximum allowable acceleration time as stated in

Tables 1 and 2.

Note: Table 2 lists starting time capacity for starting cycles

occurring more than once every 2 hours.

Push start button. Observe motor current during load

acceleration and number of seconds required to reach full

speed (Fig. 2).

Increase amount of flow charge if:

A. Acceleration time reaches maximum allowable before load

is up to speed. Turn off power immediately if this time is

reached.

B. Acceleration amperage is below motor nameplate.

Decrease amount of flow charge if:

A. Acceleration time is less than 1-1/2 seconds.

B. Acceleration amperage is above 200% of motor nameplate.

Once satisfactory operation has been obtained, record the

following for future reference:

1. The amount of flow charge

2. Starting current

3. Acceleration Time

WARNING: The rotor must slip during acceleration to

allow flow charge to become evenly distributed in the

FLEXIDYNE housing. Therefore, DO NOT ALLOW FLEXIDYNE

MECHANISM TO RUN "FREE" (that is, without a load on the

driven end), otherwise an out-of-balance condition may

result, damaging mechanism and attached equipment.

400

Nameplate

300

Motor

Current

200

100

Figure 2 - Typical Motor Current vs. Time

In-rush Amps

Acceleration Amps

Lock-In

Running

Amps

Seconds from Start

OPERATION

The amount of flow charge in the housing determines the

acceleration time for a given load. Slower acceleration times will

occur when less flow charge is used and faster acceleration, from

stop to full speed, will be observed with greater amounts of flow

charge.

The FLEXIDYNE mechanism should start the load smoothly and

without delay, provided the proper amount of flow charge has

been used. Should the acceleration time exceed the maximum

allowable in Table 1, shut off power to the FLEXIDYNE mechanism

immediately. Allow the FLEXIDYNE mechanism to cool, then

add small amounts of flow charge until proper acceleration is

observed.

Vibration is an indication of accelerating too rapidly and not

allowing flow charge to become evenly distributed in the

FLEXIDYNE housing. This can be corrected by removing small

amounts of flow charge until vibration subsides. Other causes of

vibration are: undersize shafting, unit not installed far enough on

shaft or worn bore in the unit.

Slippage — The FLEXIDYNE mechanism can, without slipping,

transmit overloads up to 130% of its pre-set starting torque.

Should this breakaway torque be exceeded, the FLEXIDYNE

mechanism will slip and generate heat (see Overload Protection).

Although slippage usually indicates increased loads, it can also

be caused by worn flow charge or a worn rotor especially if the

FLEXIDYNE mechanism has been in operation for some time. The

necessity to replace either a rotor or flow charge will be made

evident by a loss in power transmitting capacity of the FLEXIDYNE

mechanism.

MAINTENANCE

For average industrial applications involving 3 or 4 starts a day

and of not more than 6 seconds acceleration time each, the flow

charge should be changed every 10,000 hours of operation. For

more severe conditions, visually inspect flow charge at more

frequent intervals; it should be changed when it has deteriorated

to a half powder, half granular condition. See page 8 for flow

charge analysis. Visual inspections should continue until enough

flow charge changes have been made to adequately establish a

schedule for renewing FLEXIDYNE flow charge.

The FLEXIDYNE mechanism has been lubricated at the factory

and no further lubrication is required. Never apply grease, oil or

any other foreign material to the flow charge.