The TÜNKERS electric vibratory pile drivers function on the principle of self-synchronisation and create correctly aligned vibrations.
The vibrator with unbalance load shafts, turning in opposing directions and driven by hydraulic (sollte das nicht “electric” sein?) motors which transfer the torque directly to the unbalance load shafts.
The self-synchronisation is achieved by the centrifugal force and the constructive concept in one fixed and one freely movable vibration body.
Since there are no gears and transmissions in this design, oil lubrication is not required. No high operating temperatures are generated and the noise emission is low. There are no failures due to transmission damage and no reduction of the lifespan of the roller bearings.
Practical experiences have proven these design features to be the most suitable concept for vibration machines.
Special Features
- Constant centrifugal force through RPM stability
- Self-synchronising of the unbalances
- DUAL System (two RPM ranges)
- Environmentally-friendly electric drive – no pollution by oil
- Optimal degree of efficiency
- Simple handling through electric cable
- Suited for under-water and low-temperature application
- Highly elastic vibration damper
- Compact design, easy to maintain and dependable
Electric Vibrator PE 50 RF Vario
Resonance-free operation
with vibration-free start-up and coast-down
The PE series of electric vibration drivers, field-proven for many years, has been supplemented by the PE 5005 with vibration-free start-up and coast-down.
The frequent application of vibrators in the immediate vicinity of resonance-vibration-sensitive buildings and facilities demands extreme care in the operation of machines which can emit high-energy resonance vibration. This energy can also occur and be transmitted during the start-up and coast-down of vibration rams with high centrifugal forces in resonant soil. The Tünkers vibratory pile drivers with higher output operate on the principle of self-sustaining automatic start-up and coast-down.
This method is based on the principle of unbalances arranged in pairs in mutual ’zero’ position upon start-up, so that all unbalances are rotating towards each other in the form of a full flywheel. The resulting centrigual forces annul each other to 'zero'.
Only after full operating RPM is reached, an electric signal from the control panel shifts the paired unbalances by 180°. The effected centrifugal forces generate maximum centrifigal force with constant operating speed as a 'vectorial sum'. At the end of the vibration process, the weights are automatically shifted back in pairs as ‘flywheel’ prior to their coast-down. The resulting centrifugal force equals 'zero' - the coast-down of the critical range of the operating speed is therefore completely free of vibration!
Important Advantages of the PE 5005:
- Absolutely vibration-free and automatic start-up and coast-down
- Direct start-up of electric motors – only two robust cables are required
- Soft-start technology built into the electric control panel guarantees gentle usage of the generating set – no current peak values
- Absolutely neutral weight distribution of the PE 5005 – good stability on the ramming body
- Optimally functioning locking clamp - mechanical separated jaws from the pressure cylinder
- Low center of gravity of the entire machine
- Optimal protection of the cables and hoses
- Dual cable hanger suspension attachment to the vibration damper SD-70 via 2 shackles
- High static pulling force assured with optimal (six-fold) cable safeguard
| Technical Data |
|
| Centrifugal Force |
623 kN |
| Unbalanced mass frequency / RPM |
1500 min-1 |
| Amplitude at free-hanging vibrator max. |
12,6 mm |
| Acceleration with freely suspended vibrator |
19 xg |
| Dynamic weight (oscillation mass) + 1 locking clamp |
3200 kg |
| Static Torque, total |
206 Nm |
| Static tensile force |
250 kN |
| Force of locking clamp (at 320 bar) |
800 kN |
| El. motor output (continuous) 4 x 20,0 kW = |
80 kW |
| El. motor output (short term) 4 x 30,0 kW = |
120 kW |
| Power source - Generator 400 V ca. |
200-250 kVA |
