FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media
  • Minerals & Mining
  • Power & Energy
  • Oil & Gas
  • Chemical Industry
  • Food & Pharmacy
 
FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media
  • Minerals & Mining
  • Power & Energy
  • Oil & Gas
  • Chemical Industry
  • Food & Pharmacy
 
FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media
  • Minerals & Mining
  • Power & Energy
  • Oil & Gas
  • Chemical Industry
  • Food & Pharmacy
 
FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media
  • Minerals & Mining
  • Power & Energy
  • Oil & Gas
  • Chemical Industry
  • Food & Pharmacy
 
FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media
  • Minerals & Mining
  • Power & Energy
  • Oil & Gas
  • Chemical Industry
  • Food & Pharmacy
 
04/2014

Electronic crankshaft coupling - FELUWA development follows technology trend Industrie 4.0.

The energy efficient FELUWA allround diagnostics system with SPS control for permanent condition monitoring of all important pump components and parameters, which can be control by means of a touch panel or via Interent, is successfully in operation for more than ten years.

Fig. 3: (from left to right) Florian Pitzen, Hans-Peter Müllers, Daniel Nägel during the test series at the FELUWA test rig.

Fig. 3: (from left to right) Florian Pitzen, Hans-Peter Müllers, Daniel Nägel during the test series at the FELUWA test rig.

Fig. 2: Pulsation measuring during the FELUWA string test A – Piston shifted by 180°, B- Piston shifted by 90°, C- Pump operation without crank shaft coupling

Fig. 2: Pulsation measuring during the FELUWA string test A – Piston shifted by 180°, B- Piston shifted by 90°, C- Pump operation without crank shaft coupling

Fig. 1: Crank shaft coupling of two double-acting one cylinder pumps.

Fig. 1: Crank shaft coupling of two double-acting one cylinder pumps.

In addition to this the FELUWA systems technology offers a multiple pump control system to the customer which reduces the residual pulsation, which is typical for oscillating piston pumps, by means of a electronic crankshaft coupling to a minimum value of < ± 1.5% thus ensuring a unique uniformity.

In a current test series two identical double-acting one cylinder pumps were each equipped with an additional displacement transducer (Fig. 1). This distance sensor measures the piston position, converts it into a uniform signal and transfers the data to the control unit. The SPS control programming varies the stroke rate in a way that both pumps operate together with an optimal phase shift thus achieving a very low residual pulsation. Both double-acting one-cylinder pumps are connected by means of the crankshaft coupling and operate as a unit comparable with a double-acting two-cylinder pump.

The test series results confirm the enormous advantages of the crankshaft coupling (Fig. 2)

Test A: In coordination with the distance sensor the FELUWA control system is programmed to ensure that the pistons are operating shifted by exactly 180°. Two pump heads convey simultaniously, one per pump each.

Test B: The program controls the pumps by means of frequency converters which are linked via Profibus ensuring that the pistons are running shifted by exactly 90°. Now all the four pump heads convey with the same interval into the same discharge pipe.

Test C: Both pumps convey without the multiple pump control system into the same pipe.

The test rig graphics recorded within the FELUWA string test show that residual pulsation can be significantly reduced once again by means of the electronic crankshaft coupling. Operation of this pump type without the multiple pump control system (test C) results in a residual pulsation of ± 3 %. After adding the crank shaft coupling residual pulsation is minimized to ± 1.5 % (test B).

A comparable coupling for 3 QGK 1000 pumps with a total capacity of 3,900 kW is currently in the stage of commissioning.