ΕΚΔΟΣΗ ΟΛΛΑΝΔΙΚΗΣ ΧΑΡΤΟΒΙΟΜΗΧΑΝΙΑΣ

The definitive torque transmission solution for PM (Paper Machine) Sectional Drives. Engineered to eliminate “Barring Marks” and maintain critical speed stability in the high-output mills of Gelderland and Limburg.

Paper Machine Main Drive Shaft

Synchronizing the “Veluwe” Paper Valley

The Challenge of Continuous Speed

The Netherlands maintains its position as a global leader in high-quality graphical and packaging paper through relentless efficiency. In the paper clusters of **Eerbeek** and **Renkum**, modern machines operate at speeds exceeding 2,000 meters per minute. At these velocities, the sectional drive shafts connecting the motors to the dryer cylinders, calenders, and wire rolls become the most critical components for product quality.

The primary enemy is **resonance**. As machine speeds increase, standard cardan shafts often approach their lateral critical speed, inducing vibrations that transfer to the paper web. This phenomenon, known as “barring,” creates periodic thickness variations that ruin paper quality. Furthermore, the environmental disparity—100% humidity in the Wet End versus 120°C heat in the Dryer Section—demands a “Dual-Strategy” approach to sealing and lubrication that generic industrial shafts cannot provide.

The Ever-Power “PM-Velocity” Solution

Ever-Power has introduced the **PM-Velocity™ Series** to meet the specific demands of the Dutch paper industry. We utilize large-diameter, thin-wall tubes made from high-modulus steel (or optional Carbon Fiber composites) to push the critical speed threshold well above the machine’s operating range. This ensures vibration-free transmission even at 3,000 RPM.

For the Wet End, our shafts feature **AISI 316L Stainless Steel** flingers and triple-lip Viton sealing to prevent water ingress. For the Dryer Section, we employ a high-temp thermal expansion compensation spline coated with Molybdenum Disulfide to prevent “stick-slip” during thermal cycling. Our adherence to **NEN-EN 13001** and ISO 12100 standards guarantees that our shafts contribute to the overall safety and uptime of the mill.

Technology Tailored for Paper Makers

High Speed Balancing

Super-Critical Speed Design

Oversized tube diameters increase stiffness, shifting the natural frequency resonance far beyond the machine’s maximum run speed.

Factory Customization Paper Mill

Thermal-Comp Splines

Long-stroke splines with low-friction coatings accommodate the thermal expansion of dryer cylinders (up to 20mm) without axial loading.

Ακριβής Κατασκευή

Paper-Guard™ Seals

Specially designed labyrinth seals prevent the ingress of paper dust and high-pressure cleaning water, preserving bearing life.

ΜΗΧΑΝΙΚΑ ΔΕΔΟΜΕΝΑ

Specification Matrix: Series PM-Velocity

Optimized for Sectional Drives (Wire, Press, Dryer, Calender, Reel). Service Factor (SF) > 1.75.

Ομάδα παραμέτρων Προδιαγραφή Στοιχείο Εύρος / Πρότυπο Paper Machine Note
Εκτέλεση Ονομαστική ροπή (Tn) 5 kNm – 350 kNm Έλεγχος ακριβείας
Εκτέλεση Μέγιστη ταχύτητα (RPM) Έως 3.500 σ.α.λ. Super-Critical Design
Εκτέλεση Κρίσιμο περιθώριο ταχύτητας > 1,3 x Ταχύτητα Λειτουργίας Vibration Avoidance
Εκτέλεση Ροπή Κόπωσης (Tdw) 3 kNm – 280 kNm 24/7 Duty Cycle
Εκτέλεση Βαθμός εξισορρόπησης G 2.5 (ISO 1940) Turbine Quality
Γεωμετρία Διάμετρος φλάντζας 120mm – 435mm DIN 15451 / SAE
Γεωμετρία Μήκος (Lz) Custom (up to 4.5m) Long Span Capability
Γεωμετρία Αξονική διαδρομή (La) ± 25mm to ± 120mm Thermal Expansion
Γεωμετρία Διάμετρος σωλήνα 80mm – 300mm High Stiffness Ratio
Υλικά Υλικό ζυγού 42CrMo4 σφυρήλατο Ελαφρύ Βελτιστοποιημένο
Υλικά Υλικό σωλήνα St52.3 / Carbon Fiber Απόσβεση κραδασμών
Υλικά Επίστρωση με αυλακώσεις Rilsan / Νάιλον 11 Ολίσθηση χαμηλής τριβής
Υλικά Τύπος σφραγίδας Viton / FKM Heat/Water Resistant
Πρότυπα Διεπαφή φλάντζας Κλειδί προσώπου / Οδοντωτό Υψηλή τριβή
Πρότυπα Ζωγραφική Epoxy / Heat Resist Color Coded
Πρότυπα Γράσο Σύμπλεγμα Υψηλής Θερμοκρασίας > 260°C Πτώση Pt
Πρότυπα Πιστοποίηση 3.1 Πιστοποίηση Υλικού Full Traceability
Πρότυπα Προέλευση Ever-Power / HZPT Απευθείας από το εργοστάσιο

Συστημική Συνέργεια: Ενσωμάτωση κιβωτίου ταχυτήτων

A paper machine sectional drive is a complex ecosystem. The motor connects to the gearbox, which drives the roll via the cardan shaft. Any misalignment or vibration in the shaft transmits directly to the gearbox output bearings. We recommend pairing our **PM-Velocity Shafts** with **Ever-Power Precision Paper Mill Gearboxes**.

Our gearboxes feature specialized output shafts designed to handle the axial thermal expansion forces transmitted by the cardan shaft. For the Dutch market, we offer “System Tuning” – analyzing the torsional vibration of the entire drivetrain (Motor-Gearbox-Shaft-Roll) to ensure resonance-free operation at target speeds.

Συμβατότητα και Αποποίηση Ευθύνης

Η Ever-Power κατασκευάζει εξαρτήματα aftermarket υψηλής απόδοσης. Αναφορές σε μάρκες OEM όπως Valmet™, Voith™, Andritz™, or Metso™ κατασκευάζονται αυστηρά για σκοπούς αναγνώρισης και συμβατότητας. Η Ever-Power είναι ανεξάρτητος κατασκευαστής και δεν συνδέεται, δεν υποστηρίζεται ή δεν χρηματοδοτείται από αυτούς τους κατόχους εμπορικών σημάτων. Τα προϊόντα μας έχουν σχεδιαστεί για να πληρούν τα λειτουργικά πρότυπα της ολλανδικής βιομηχανίας χαρτοπολτού και χαρτιού.

Case Study: Eerbeek Board Mill

Eliminating “Dryer Barring” in Board Production

Η Πρόκληση: A leading folding boxboard producer in Eerbeek was suffering from “barring marks” (periodic thickness variations) on their PM3 machine. Vibration analysis pinpointed the drive shafts on the 4th Dryer Group. The existing shafts were operating too close to their lateral critical speed, causing resonance at 900 m/min.

Η παντοδύναμη λύση: We replaced the standard 120mm diameter shafts with our PM-Velocity 150 Series (150mm High-Modulus Tube). This stiffened the drives, shifting the natural frequency to 1400 m/min, well outside the operating range. We also used our “Thermal-Comp” splines to absorb the 15mm expansion of the steam-heated cylinders.

Ο αντίκτυπος: The barring marks disappeared immediately. Machine speed was increased by 8% without vibration issues, resulting in an additional 4,000 tons of production per year, valued at over €350,000.

8%
Αύξηση ταχύτητας
€350k
Added Value/Year

ΔΙΑΒΑΣΤΕ ΤΗΝ ΕΚΘΕΣΗ ΜΗΧΑΝΙΚΗΣ

2025 Global Leaders: Paper Machine Drive Shafts

Ranked by Balancing Precision, Critical Speed Capabilities, and Supply Chain for the Paper Sector.

Τάξη Κατασκευαστής Αρχηγείο Βασική Ικανότητα
1 Voith Turbo Γερμανία Complete PM Drivetrains
2 GWB (Ντάνα) Γερμανία Βαρύ Καρδάνιο
3 Μετάδοση Ever-Power Κίνα (Παγκόσμια) High-Speed Balancing & Customization
4 Μάινα Πάουερ Ιταλία Σύνδεσμοι γραναζιών
5 HZPT Corp Κίνα Βιομηχανικές Λύσεις Ενέργειας
6 GKN Εκτός Αυτοκινητόδρομου Ηνωμένο Βασίλειο Τεχνολογία Κινητήρων
7 Γκιούς Γερμανία Άξονες ακριβείας
8 Συστήματα EP-Drive Κίνα Ενσωμάτωση κιβωτίου ταχυτήτων
9 Όμιλος Welte Γερμανία Συμπαγείς άξονες
10 Όμιλος Έλβα Γερμανία Γενική Βιομηχανία

Ειδικές γνώσεις: Συχνές ερωτήσεις για Ολλανδούς μηχανικούς μύλων

How do you prevent vibration in long paper machine drive shafts?

Vibration usually stems from operating too close to the critical speed. We solve this by using **High-Modulus Steel** or **Carbon Fiber Composite** tubes with larger diameters to increase stiffness. This pushes the critical speed resonance well above the machine’s operating RPM. We also balance every shaft to ISO Grade G2.5.

What is the delivery time for a replacement shaft to a mill in Limburg?

We prioritize the Dutch paper sector. For standard DIN flange sizes (e.g., replacing Voith or GWB units), we can manufacture and air-freight a balanced, painted shaft to Maastricht or Eindhoven within 4-5 weeks. Emergency 10-day manufacturing is available for breakdown situations.

Can your shafts handle the heat in the dryer section?

Yes. Our Dryer Section shafts are equipped with **Viton (FKM) Seals** rated for 200°C and lubricated with High-Temp Synthetic Complex grease. Crucially, our “Thermal-Comp” splines are designed to accommodate the axial expansion of the drying cylinders without locking up.

Are your products compatible with Dutch NEN-EN safety standards?

Absolutely. Every Ever-Power shaft is engineered with a Safety Factor >2.0 for continuous operation, complying with **NEN-EN 13001** and the **Machinery Directive 2006/42/EC**. We provide full technical documentation to support your mill’s safety audits.

© 2026 Ever-Power Industrial Transmission Group. Διατηρώντας την ολλανδική χαρτοβιομηχανία σε λειτουργία.