JR SERIES

JVM® Exciter

JR rectangular vibrators are robust electromagnetic drives designed to generate linear vibrations and specifically engineered for use in orientation and conveying systems. With their compact design, high reliability, and steplessly adjustable stroke, they are ideally suited for tasks such as orienting, sorting, and conveying piece goods or bulk material flows.

Thanks to their precise vibration characteristics, processes can be controlled efficiently and adapted exactly to product-specific requirements. The JR series proves its value across a wide range of industries – from mechanical engineering and the automotive sector to electronics manufacturing – wherever precise positioning and conveying are essential.

*only available in German at the moment

FUNcTION

JVM® exciters are primarily used for large and heavy vibration machines. Forced mechanical synchronization dispenses with the critical synchronization phases and the associated high loadings during starting and stopping. An oil splash system supplies the gears and bearings with a constant supply of lubrication. Two shafts with centrifugal weights are operated in opposite directions via a toothed gear, this action creates linear vibrations. The drive power is generally transmit-ted via a cardan shaft with a standard, stationary motor. JVM® exciters are primarily used for large and heavy vibration machines. Their long service lives and problem-free operation throughout the world – even under the most difficult industrial conditions – testifies to the JVM® technical design. Instead of high-tension, welded designs, JR gearbox housings are manufactured exclusively from high quality nodular cast iron. The bearing arrangements consist of heavy duty, high quality cylinder roller bearings. The centrifugal weights are also protected by particularly sturdy hoods. Forced mechanical synchronization dispenses with the critical synchronization phases and the associated high loadings during starting and stopping. The base machine construction is conservatively designed. Easy maintenance An oil splash system supplies the gears and bearings with a constant supply of lubrication. JVM® exciters can be operated in any position and are reliable in ambient temperatures of -40 … +80°C when the appropriate oil is used. With the machine off, the oscillation amplitude can be reliably set to the particular requirements by simply adjusting the centrifugal weights. The oscillation frequency can additionally be adjusted via a frequency converter. A standard hydraulic or 3-phase motor is used as the drive motor. Please note that the highest admissible speed of the exciter may not be exceeded and that the motor’s starting torque must be 2.5-times that of the nominal torque. Where extremely wide or heavy machines are concerned, several exciters can be operated in series with one drive motor. The starting torque is thereby transmitted form one exciter to the next by coupling shafts.

Scope of delivery

Advantages

Exciters

Applications

JR rectangular vibrators are used wherever workpieces or bulk materials need to be precisely oriented, positioned, or separated – particularly in automated production and feeding processes.

Technology at a Glance

Technical Data

The JVM® JR series rectangular vibrators are high-performance vibration exciters designed for reliable continuous operation in demanding industrial applications. They stand out with high working moments, versatile application options, and a rugged design that ensures maximum operational safety even under extreme environmental conditions.

6- and 8-Pole Designs

Available in 6- or 8-pole configurations to adapt rotational speed and vibration characteristics to the specific application.

Working Moments up to 20,400 kgcm (630 kN)

Deliver powerful vibration energy for the efficient operation of large and heavy machinery systems.

Adjustable Centrifugal Force

The generated centrifugal force can be flexibly adjusted to precisely match the vibration intensity to the conveying or screening process.

Continuous Duty – 100% (S1 Operation)

Designed for uninterrupted continuous operation at full power without the need for cooling intervals.

Ambient Temperature Range -40 °C to +80 °C

Reliable operation even under extreme climatic conditions – from arctic cold to tropical heat.

JR ESXCITER

Oil Management System

In conventional exciters, the bearings are lubricated by oil mist. The gears inside the housing churn the oil into fine droplets, which are distributed within the gearbox. Only a portion of these droplets reaches the rolling bearings and provide the lubrication. Some housings have oil collection pockets on the inside. These are intended to guide the oil along the inner surfaces of the housing downwards into the bearings. However, the entry of oil into the bearings is random and the quantity is undetermined.

To improve the entire lubrication, the JOEST Oil Management System has been developed.

Immediate lubrication of the bearings
Oil reaches the raceways of the rolling bearings directly
Continuous oil flow into the bearings
Lower sensitivity to dirt particles
Ingress of dirt is prevented by counteracting oil flow
Cleaning of the oil through the filter
More reliable operation
Higher availability due to longer bearing life

The JOEST Exciter is equipped with an oil pump, which is driven by the gears of the exciter drive. Thus, no auxiliary power is needed to operate the pump. The oil pump draws oil from the sump of the housing and the oil enters thel filter, where dirt particles < 6 μm are separated. The oil filter is designed generously to be replaced after several oil changes.

Subsequently, the oil flow is distributed to the four bearing units. Through the circumferential groove on the outer ring of the bearing, the oil reaches the inside and flows from there through holes to the rolling elements. Thus, the oil flows axially from the center of the bearings outwards. Any dirt that may occur in the housing is therefore not flushed into the bearings, but is moved away from them. Since the pump is firmly coupled with the movement of the exciter drive, the lubrication is activated immediately upon startup and therefore eliminates the critical phase where the oil moist is initially fomed.