{"id":1773,"date":"2026-01-22T02:50:51","date_gmt":"2026-01-22T02:50:51","guid":{"rendered":"https:\/\/hydrauliccylindersmanufacturer.com\/?p=1773"},"modified":"2026-01-22T02:50:51","modified_gmt":"2026-01-22T02:50:51","slug":"hydraulic-propulsion-cylinders-for-tbm-segment-installation-systems","status":"publish","type":"post","link":"https:\/\/hydrauliccylindersmanufacturer.com\/sv\/ansokan\/hydraulic-propulsion-cylinders-for-tbm-segment-installation-systems\/","title":{"rendered":"Hydrauliska framdrivningscylindrar f\u00f6r TBM-segmentinstallationssystem"},"content":{"rendered":"
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Hydrauliska framdrivningscylindrar f\u00f6r TBM-segmentinstallationssystem<\/h1>\n

Engineering absolute structural integrity with forged trunnion technology and high-alloy welded architecture for the world’s most demanding tunneling projects.<\/p>\n<\/div>\n<\/div>\n

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The Backbone of Tunnel Advancement<\/h2>\n

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\u2014a 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.<\/p>\n

P\u00e5 N\u00e5gonsin makt<\/a>, 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 Double-Acting Piston Design<\/strong> reinforced with Smidda st\u00e5ltappar<\/strong>. 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.<\/p>\n

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Kliv in i v\u00e5r digitala tvillingfabrik<\/h3>\n

Witness the precision forging and welding processes that define our TBM cylinders. Explore our facility virtually before you specify your components.<\/p>\n<\/div>\n

Lansera VR-upplevelsen<\/a><\/div>\n<\/div>\n
Beg\u00e4r tekniska specifikationer<\/a><\/div>\n<\/div>\n
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Engineering Against Trunnion Fatigue<\/h2>\n

The interface between the hydraulic cylinder and the TBM structure\u2014the trunnion mount\u2014is 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.”<\/p>\n

Our solution involves a fundamental shift in manufacturing: Integral Forging<\/strong>. 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.<\/p>\n<\/div>\n

\"Heavy<\/div>\n<\/div>\n
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K\u00e4rntekniska f\u00f6rdelar<\/h2>\n
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Forged Trunnion Integrity<\/h3>\n

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.<\/p>\n<\/div>\n

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High-Load Alloy Architecture<\/h3>\n

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.<\/p>\n<\/div>\n

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F\u00f6rsvar mot kontaminering<\/h3>\n

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%.<\/p>\n<\/div>\n

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Segment-Friendly Contact<\/h3>\n

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.<\/p>\n<\/div>\n<\/div>\n

\"Exploded<\/div>\n<\/div>\n
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Project Success: Urban Metro Expansion in Mixed Geology<\/span><\/h2>\n
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Utmaningen<\/h3>\n

A metro line project in East Asia faced a critical engineering hurdle. The TBM had to navigate a “mixed face” transition zone comprising hard granite and soft marine clay. This geological inconsistency caused severe vibration and uneven loading on the shield. The existing OEM propulsion cylinders, which utilized standard welded trunnions, began to experience trunnion ovalization and hydraulic leaks after only 1.5km of tunneling, threatening the project timeline.<\/p>\n

L\u00f6sningen<\/h3>\n

Ever Power was contracted to provide an emergency retrofit. We supplied 32 units of our Heavy-Duty Forged Trunnion Propulsion Cylinders<\/strong>. These units featured an upgraded 300mm bore with 42CrMo construction and a customized rod coating designed for high-vibration environments. The retrofit was completed during a scheduled cutterhead intervention.<\/p>\n

Resultatet<\/h3>\n

The upgraded cylinders successfully completed the remaining 6km of the tunnel drive without a single structural failure. The maintenance team reported a significant reduction in seal replacements, attributing it to the rigidity of the forged barrel maintaining better concentricity under load.<\/p>\n<\/div>\n

\"TBM<\/div>\n<\/div>\n
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“The structural rigidity of the forged trunnion design is evident. We no longer see the ‘binding’ issues during steering corrections that plagued the previous cylinders.”<\/p>\n

\u2014 Zhang Wei, TBM Project Manager<\/p>\n<\/div>\n

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“Ever Power delivered the custom retrofit set in 40 days. That speed saved us substantial penalties on the project timeline.”<\/p>\n

\u2014 Michael Hensley, Procurement Lead<\/p>\n<\/div>\n

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“We were impressed by the chrome plating quality. It stood up to the silicate slurry much better than the original European parts.”<\/p>\n

\u2014 Li Jun, Maintenance Superintendent<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Tekniska parametrar och specifikationer<\/h2>\n
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Parameter<\/th>\nStandardspecifikation<\/th>\nTeknisk f\u00f6rdel<\/th>\n<\/tr>\n<\/thead>\n
Cylindertyp<\/td>\nDouble-Acting, Piston Type<\/td>\nPrecise control for extension (push) and retraction<\/td>\n<\/tr>\n
Monteringsstil<\/td>\nForged Trunnion (Integral\/Shrink-Fit)<\/td>\nMaximum resistance to eccentric & shear loads<\/td>\n<\/tr>\n
Materialsammans\u00e4ttning<\/td>\n42CrMo \/ 27SiMn Alloy Steel<\/td>\nHigh yield strength allows for compact, light design<\/td>\n<\/tr>\n
Arbetstryck<\/td>\n350 bar (nominellt) \/ 450 bar (topp)<\/td>\nDelivers immense thrust force for hard rock TBMs<\/td>\n<\/tr>\n
Borrdiameter<\/td>\n160mm – 400mm<\/td>\nCustomizable based on machine tonnage (Shield Diameter)<\/td>\n<\/tr>\n
St\u00e5ngbel\u00e4ggning<\/td>\nFlerskiktad h\u00e5rdkrom \/ Ni-Cr<\/td>\nPrevents pitting corrosion and scoring from concrete<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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M\u00e5ngsidiga applikationsmilj\u00f6er<\/h2>\n
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\"TBM<\/div>\n
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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.<\/p>\n