Mannesmann Demag MRD 12-280, Руководство по установке и обслуживанию

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Oil-free motors
In the case of completely dry compressed air without any added oil, the neutral speed may drop
depending on the running time of the motor. However if the compressed air does contain small
quantities of oil, the functional capability is not affected.
Direction of rotation of the motors
Depending on the motor type, different directions of rotation are possible depending on the connection.
Reversible compressed air motors
Type MU (page 2, fig. 1)
The reversible motor has two air connections: L for counter-clockwise and R for clockwise operation.
When connecting up the motor, ensure that the side not subject to pressure is vented. If the motor
is used for only
one direction of rotation, ensure that the second air connection is not sealed. This would
cause the motor to malfunction. For silencing in this case, we recommend using a silencer available
from the manufacturer.
Reversible compressed air motors
Type MUD (page 2, fig. 2)
For type MUD motors, it is also possible for a speed throttle or silencer to be connected.
Note: In
type MUD motors, the waste air is divided approx. 2/3 via the exhaust connection and 1/3 via the non-
pressurised side. Reversible air motors can be used in rotating direction clockwise and anti-clockwise.
It is important that if the motor is pressurized with connection turning the air motor left, the con-
nection turning the air motor right is vented properly (and vice versa). The connection side which is
not pressurized must not be closed or blocked. In case a valve system is connected, make sure that
also the valve vents the connection properly.
Clockwise | counter-clockwise compressed air motors
Type MR, ML (page 3, fig. 3)
Clockwise | counter-clockwise compressed air motors
Type MRD, MLD (page 3, fig. 4)
If the motor is operated with a speed throttle or silencer, then this is fitted to the exhaust connection
of the motor. The air intake not required in this case is sealed in the factory.
Note: it is not possible to
changeover from counter-clockwise to clockwise respectively from clockwise to counter-clockwise!
Motors with adherence-actuated | friction brake
Type MUB
Control of the adherence-actuated brake,
construction series MUB 300 – 600 (page 3, fig. 6)
The integrated adherence-actuated brake is triggered directly by the motor working air at the valid
operating pressure.
Control of the friction brake,
construction series MUB 300 – 600 (page 3, fig. 6)
The integrated friction brake is controlled by a separate control line. Here the spring-loaded single-disk
brake must be vented with at least 4.8 bar pressure to open the brake, i. e. the brake is activated when no
pressure is applied.
Stall-proof | not stall-proof motors
Stall-proof motors
Stall-proof motors can be operated down to a standstill, i. e. no damage is caused to motor and gear
when the motor is stopped while running and when under pressure.
Not stall-proof motors – especially low speeds
These motors cannot be operated until standstill, i. e. only up to the max. stated torque. To ensure
that the permitted torque is not exceeded, we recommend fitting an overload clutch / torque limiter.
Please consult the technical data for the tolerable torques.
2.2
2.3
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
3
3.1
3.2
English
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