This symbol is in this operating manual allocated to those safety instructions which
deal with danger to the health and life of persons.
These instructions must be strictly observed. Please pass this document to,the
operators of the unbalance vibrator.
Apart from the work safety instructions in this operating manual, the general as well
as the local safety and accident prevention regulations must be observed.
1.2. 'Attention' notice
This symbol is in this operating manual allocated to those notes, regulations and
guidelines which deal with damage to or destruction of the unbalance vibrator as a
result of inexpert operation.
1.3. General work safety and 'attention' instructions for unbalance
vibrators
It must be ensured that every person charged with the installation, operation and
maintenance of the unbalance vibrator has read and understood this operating
manual before commencing work.
The unbalance vibrator has been built in accordance with the latest state of
technology and is safe and reliable. If, however, it is inexpertly operated by
uninstructed persons, it may cause grave injury and damage.
The unbalance vibrator ist intended exclusively for the application agreed with the
manufacturer. If this is not observed, the manufacturer will not accept liability for any
resulting damage or injury.
For the installation, electrical connection, setting of centrifugal force and
maintenance, it must be made clear which person is responsible for the work, so that
safety is not impaired when working with the unbalance vibrator.
The unbalance vibrator must only be operated in its original condition, except for the
setting of centrifugal force. If changes from the original condition are found, these
must be reported by the operator to the appropriate office.
Conversions and alterations of the unbalance vibrator on the operator's own
initiative, which could impair the safety, are not permitted.
JV/JVA 10-27
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OPERATING MANUAL
All maintenance and setting work on the unbalance vibrator must in principle only be
carried at rest. Before starting work, ensure that the unbalance vibrator cannot be
switched on accidentally or by unauthorized persons.
The unbalance vibrator must never be operated without the covers of the centrifugal
weights. Danger of injury!
The electrical connection of the unbalance vibrator must be adequately fused..
If the insulation of the connection cable is damaged or if the cover of the terminal
box is missing, there is a life-threatening danger of electrocution! Such defects must
be corrected immediately!
In areas which are subject to explosion risk, only explosion-proof unbalance
vibrators must be used. This is indicated as such by the type of explosion-proof
enclosure shown in the rating plate as well as by the EX symbol on the housing of
the unbalance vibrator. In addition, the special requirements of this operating manual
for save use must be observed.
JV/JVA 10-27
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2. General notes
Only with the aid of this operating manual it is possible to install, set, operate and
maintain the unbalance vibrator properly and safely.
The manufacturer recommends that the operating manual is read through carefully,
since he does notaccept liability fordamage resulting from non-observance of this
operating manual.
The operating manual should always be kept ready to hand for the operator.
Changes in design and construction, for the purpose of improving the unbalance
vibrator, are reserved.
The characteristics power consumption [kW], rated current [A], rated voltage
[V], working moment [kgcm] and rated speed [1/min] are given on the rating
plate or type plate of the d rive.
3. Design and operation
3.1. General
The unbalance vibrator generates the vibratory motions by means of rotary
centrifugal weights.
3.2. Design of an unbalance vibrator
A type JVJVA unbalance vibrator type 10 - 27 consists of the following main
elements:
1. Stator
2. Endshield with bearing
3. Rotor
4. Centrifugal weights
5. Cover
OPERATING MANUAL
JV/JVA 10-27
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3.3. Operational characteristics
The unbalance vibrator is a three-phase squirrel-cage motor. The two shaft
extensions of the rotor, which is mounted in antifriction bearings, carry adjustable
centrifugal weights.
With the unbalance vibrator switched on, the rotary motion of the rotor and its
centrifugal weights generates a centrifugal force. This causes the machine
connected to the unbalance vibrator to vibrate.
Type N unbalance vibrators are in principle designed for continuous duty in
accordance with S1 to VDE 0530.
3.4. Noise information (according to 3. GSGV)
The sound pressure level can be taken from the data sheet of the unbalance motor.
The sound pressure level - at nominal speed and operating temperature has been
determined on a testing stand by the manufacturer.
3.5. Rating plates
The unbalance vibrator JV is identified by the following rating plate:
ATTENTION
ATTENTION
ATTENTION
The unbalance vibrator JVA is identified by the following rating plate:
4. Storage
Until its final installation, the unbalance vibrator should as far as possible be stored
in closed rooms.
If the unbalance vibrator is stored in the open, it must be covered with tarpaulins
open underneath, so that any condensate can drain off. In the case seaworthy
packing of the unbalance vibrator, this packing must not be damaged or opened
during transit and storage
The unbalance vibrator must be placed on a suitable base to counteract ground
moisture or it must be stored in shelves.
The unbalance vibrator must only be placed on its foot surfaces!
To protect against corrosion, the foot surfaces are greased before dispatch from the
works. This grease coating must only be removed immediately before installation..
OPERATING MANUAL
JV/JVA 10-27
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5. Handling
To avoid danger to persons and damage of the unbalance vibrator, the unbalance
vibrator must be handled with proper care! Apart from the instructions below, the
general as well as the local safety and accident prevention regulations must be
observed.
If the unbalance vibrator is packaged, the handling gear must only be attached at the
points marked. The symbols for handling - if any - have to be observed:
The unbalance vibrator itself must only be carried at the hitching eyes provided at
the stator. Small unbalance vibrators must be carried by using a rope fixed at the
stator.
The unbalance vibrator must only be placed on its foot surfaces!
Transit damage must always be reported to the manufacturer. Care has to be taken
that the foot surfaces and covers are in a non-damaged condition.
Hitch here! Centre of gravity! UP!
ATTENTION
ATTENTION
ATTENTION
ATTENTION
6. Installation
The unbalance vibrator must be installed by qualified personnel. The manufacturer
does not accept any responsibility for faulty installation!
The foot support surfaces of the unbalance vibrator must be metallically bright and
free from grease, paint or other impurities.
The support surfaces for the unbalance vibrator on the machine must be plane
parallel, have a maximum peak-to-valley height of R
bright as well as being free from dirt and grease.
The machine part on which the unbalance motor is mounted (e. g. motor crossmember, motor base plate), must be sufficiently strong, to eliminate the possibility of
deformation (bending, torsion) between the foot contact surfaces of the unbalance
vibrator as a result of the occuring centrifugal forces. The unbalance vibrator is not a
load-bearing component!
JV/ JVA 10 M 10 49
JV/ JVA 13 M 16 210
JV/ JVA 15 M 20 410
JV/ JVA 17/ 20 M 24 710
JV/ JVA 24/ 27 M 30 1450
Thre thread size of the fixing screws, of quality class 8.8, and the required tightening
torques are given in the above table. Self-locking nuts of quality class 8 must be
used. One washer according to DIN 125, made at least of St-50, must be placed
under the screw head and nut.
OPERATING MANUAL
Unbalanced
mass vibration
generator
25 µm and be metallically
z
Thread Torque MA
(Nm)
JV/JVA 10-27
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Self-locking nut quality class
8, Springstop- nut or
Cleveloc-nut
Type JV/JVA 10 - 20: washer DIN
125, St 50 Type JV/JVA 24 + 27:
washer dia. 50/31 x 10, St 50
A minimum distance
must be bemaintained!
After the first 50 hours of operation the unbalance vibrator, the fixing screws must be
retightened to the correct tightening torque.
The centrifugal weights of an unbalance vibrator must be set identically at both
sides. The setting can be read off with % - scales provided on the centrifugal
weights.
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