Hydrauliske fremdriftssylindere for TBM-segmentinstallasjonssystemer
Engineering absolute structural integrity with forged trunnion technology and high-alloy welded architecture for the world’s most demanding tunneling projects.
The Backbone of Tunnel Advancement
In the subterranean environment of modern infrastructure development, the Tunnel Boring Machine (TBM) represents the pinnacle of mechanical engineering. The forward momentum of these massive underground factories relies entirely on the segment propulsion system—a circumferential array of high-tonnage hydraulic jacks. These cylinders perform a dual critical function: they must exert thousands of tons of thrust against the installed concrete segments to push the TBM forward, and they must maintain precise positioning to steer the shield through complex geological curves. The failure of a propulsion cylinder is not merely a component issue; it is a project-stopping event that halts excavation and incurs massive logistical costs.
På Even makt, our 18-year engineering trajectory has focused on solving the specific failure modes associated with TBM shoving cylinders. The primary enemy in this application is not just hydraulic pressure, but the combination of extreme eccentric loading and abrasive contamination. Standard welded mounting ears frequently succumb to fatigue cracking and ovalization due to the constant micro-movements of the TBM shield. To combat this, we utilize a Dobbeltvirkende stempeldesign reinforced with Smidde ståltapptapp. This material choice transforms the connection points from the weakest link into the strongest, ensuring that the cylinder can withstand the shearing forces generated when the machine corrects its alignment against the tunnel lining.
Gå inn i vår digitale tvillingfabrikk
Witness the precision forging and welding processes that define our TBM cylinders. Explore our facility virtually before you specify your components.
Engineering Against Trunnion Fatigue
The interface between the hydraulic cylinder and the TBM structure—the trunnion mount—is the focal point of stress. In standard “welded-ear” designs, the heat-affected zone (HAZ) from welding creates a metallurgical weak point exactly where the load is highest. When a TBM pushes off the segments, especially during a turn, the lateral forces can exceed the vertical thrust. This often leads to the rapid wear or deformation of the mounting holes, known as “ovalization.”
Our solution involves a fundamental shift in manufacturing: Integral Forging. We utilize high-strength alloy steel (typically 42CrMo or equivalent) to forge the cylinder base and trunnions as a single, continuous grain structure unit. This eliminates the weld seam in the high-stress zone entirely. The result is a mounting system that can handle shock loads 300% higher than standard welded alternatives. Furthermore, the piston rods undergo a specialized quenching and tempering process followed by multi-layer chrome plating, providing a surface hardness exceeding HV850 to resist the scratching action of concrete dust and silicate debris found in the tunnel environment.
Kjerneteknologiske fordeler
Forged Trunnion Integrity
By forging the mounting trunnions directly with the cylinder base or using a shrink-fit heavy-duty design, we eliminate weld fatigue risks, ensuring zero deformation under eccentric thrust loads.
High-Load Alloy Architecture
Utilizing 42CrMo and 27SiMn alloy steels allows for thinner walls with higher yield strength, maximizing the hydraulic area within the tight confines of the TBM shield.
Forurensningsforsvar
Equipped with heavy-duty mud scrapers and specialized buffer seals to prevent concrete slurry and fine rock dust from penetrating the rod gland, extending seal life by up to 40%.
Segment-Friendly Contact
The rod end utilizes a self-aligning spherical bearing or a specialized polymer-padded shoe to distribute thrust evenly across the concrete segment, preventing cracking during installation.
Tekniske parametere og spesifikasjoner
| Parameter | Standardspesifikasjon | Ingeniørfordel |
|---|---|---|
| Sylindertype | Double-Acting, Piston Type | Precise control for extension (push) and retraction |
| Monteringsstil | Forged Trunnion (Integral/Shrink-Fit) | Maximum resistance to eccentric & shear loads |
| Material Composition | 42CrMo / 27SiMn legeringsstål | High yield strength allows for compact, light design |
| Arbeidstrykk | 350 Bar (Rated) / 450 Bar (Peak) | Delivers immense thrust force for hard rock TBMs |
| Boringsdiameter | 160mm – 400mm | Customizable based on machine tonnage (Shield Diameter) |
| Stangbelegg | Multi-layer Hard Chrome / Ni-Cr | Prevents pitting corrosion and scoring from concrete |
Allsidige applikasjonsmiljøer
While optimized for the main propulsion system of Earth Pressure Balance (EPB) and Slurry TBMs, our heavy-duty actuator technology is applicable across the entire spectrum of underground construction machinery.
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Shield TBMs: Main thrust and articulation cylinders.
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Pipe Jacking Machines: Intermediate jacking stations (IJS) for long drives.
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Segment Erectors: Lift and grip cylinders for precise segment placement.
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Box Culvert Jacking: High-tonnage, short-stroke synchronized pushing systems.
China’s Premier Hub for Heavy Industry Hydraulics
Manufacturing heavy-duty TBM cylinders requires more than just CNC machines; it requires a deep understanding of metallurgy and heat treatment. Located in China’s industrial heartland, Even makt leverages the world’s most complete supply chain for alloy steel forging.
Our competitive advantage is speed and precision customization. We do not just sell “off-the-shelf” parts. We analyze your TBM’s specific thrust curves and geological reports to engineer a cylinder that fits your specific needs. Whether you need a replacement for a Robbins, Herrenknecht, or Komatsu machine, our engineering team can replicate and enhance the original design at a fraction of the cost, with rapid export capabilities to global infrastructure sites.
Ofte stilte spørsmål (FAQ)
How does Ever Power ensure the durability of the trunnions under high load?
What is the cost benefit of sourcing TBM cylinders from China compared to Europe?
Can you manufacture replacement cylinders for discontinued or older TBM models?
What is the typical lead time for a full set of propulsion cylinders?
Hvordan beskytter dere sylinderene under internasjonal frakt?
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