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ELHY® Electrohydraulic thruster
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Function principle
The ELHY® devices are available in three different series, all of which exhibit the same functional principle, the same internal design and the same external shape.
The motor housing accommodates the stator of the drive motor, which is designed as a three-phase asynchronous squirrel cage motor. The motor runs in the operating fluid.
The electrical connection is established via the terminal box, which tightly seals the motor housing. The cast feet on the motor housing are used to secure the ELHY® device in place. The impeller of the pump is attached to the motor shaft.
The guide cylinder with the axially movable piston is located above the impeller. The interior of the device is filled with hydraulic fluid up to the level of the filler hole.
Related products
ELDRO® Explosion-proof series
- I M2 (Mining)
- II 2G for zone 1 and 2 (above ground)
- II 2D for zone 21 and 22 (above ground)
- ATEX - BVS 05 ATEX E 074 X
- IECEx - IECEx BVS 12.0014X
- TP TC - RU C-DE.ГБ04.В.00477
Installation and Operating Instructions
ELDROdynamic®
- Lower power consumption and self-heating due to the use of efficiency class IE3 motors and optimised pump geometry
- Closing times ≤ 200 ms and stroke times ≤ 700 ms are achieved with ELDROdynamic® (determined at 80 mm stroke)
- Maintenance and service friendly due to modular design
- Stroke lengths up to 500 mm are possible, differing requirements on request
- High operational reliability (failsafe)
- Long service life due to wear-free operation
- Soft and shock-free operation, due to the hydro-dynamic mode of operation
- Approved continuous operation S1 and switching operation S3 up to 2,000 operations per hour
- Any motor rotation direction
- Overloading during operation is not possible
- Continuous adjustment of lifting and/or lowering times by installing valves
- pressure sensor
- analogue displacement transducer
- temperature sensor
- force sensor
- end position sensing
ELDRO® Direct current series
Electrohydraulic thrusters ELDROclassic®
- High operational reliability
- Long service life thanks to wear-free operation with permanent self-lubrication
- Soft and impact-free operation as a systemic result of the hydraulic operating principle
- Short regulating times
- Approved continuous operation S1
- High switching frequency of up to 2000 cycles per hour in switching mode S3
- Reversing operation without any restrictions
- Easy installation and removal
- Arbitrary direction of motor rotation, therefore no changeover contactors required
- Overloading is not possible during Operation
- Arbitrary external limitation of the stroke path
- Stepless extension of the lifting and/or lowering times through the installation of valves
- The fill level of the operating medium is optimised according to the operating conditions and requires no further inspection.
- Broad standard temperature range from –25 °C to +50 °C, expandable to –45 °C to +80 °C with additional equipment, e.g. heating and use of special operating media
- No thermal protective circuit required
- No sensitive electronic and sensory installation parts needed for the operating principle