Metso MP1000, Technical Reference Manual

Page: 145 / 180

SECTION 3 - M. FRAME, ADJ. RING, TRAMP REL. & CLRNG JACK ASSY
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
3-27
Figure 3-21 Adjustment Ring Pin Bushing
3.4.11.1 Adjustment Ring Vibration
Detection
Both the MP800 and MP1000 have four vibration
sensors located on the adjustment ring. The sensors
are wired back to a single enclosure. The vibration
sensors are used to monitor ring bounce, a
condition which is NOT NORMAL and IS NOT
AN ACCEPTABLE METHOD OF OPERATION.
Refer to the MP Cone Crusher Mechanical Control
Logic document for more information. Also, refer
to Figure 3-22.
Four vibration sensors are mounted on the
adjustment ring and are wired to the MCM modules
housed in a remotely mounted enclosure. The
sensors monitor the movement of the adjustment
ring (ring bounce) and indicate problems requiring
correction to protect the crusher.
When using the vibration detection system, you
must establish analog warning and alarm setpoints.
To do this:
1. Create a limited amount of ring bounce by
adjusting the Crusher setting while
monitoring the analog output readings from
the MCM Modules.
2. When ring bounce is detected, select the
highest analog value and use that as your
alarm setpoint. Calculate a value that is 10%
less than the alarm setpoint to establish the
warning setpoint.
3. Next, program the control to take the
following corrective actions based on the
four analog signals.
a. Instantaneously indicate which of the
four sensor signals reach the established
warning set-point. This signal or signals
should not interrupt the feed but only
alert the operator that the Adjustment
Ring is on the verge of moving and that
corrective actions should be taken to
correct the problem(s) before the alarm
set-point is reached and the feed is shut
down.
b. Interrupt the feed to the Crusher if either
of the following two conditions occur:
Any of the four sensor signals exceed the
established alarm set-point for a period of 10
seconds.
or
If there are five occurrences of a three second
continuous signal above the alarm set-point in a
two minute period.
Corrective actions may include, but are not limited
to, adjustment of the Crusher setting and/or
correction of poor feed conditions. Alarm
conditions during no-load operation, feed start, feed
stop and adjustment under load can be ignored.
Callout Description
1 Main frame pin
2 Main frame pin bushing
3 Adjustment ring
1
2
3