執筆者 エピソード | 2025 年 12 月 30 日 | 油圧シリンダーの用途
In the demanding realm of engineering machinery, especially with those massive tunnel boring machines we know as TBMs, we’ve observed over the years how a sturdy hydraulic cylinder truly shines in the segment erection system. These assembly cylinders face...
執筆者 エピソード | 2025 年 12 月 30 日 | 油圧シリンダーの用途
You are 500 meters into a drive, the ground conditions have just shifted from clay to abrasive granite, and suddenly the operator reports a pressure drop in Zone B. You check the propulsion system and see it: the trunnion ear on the number 12 cylinder has cracked, or...
執筆者 エピソード | 2025 年 12 月 30 日 | 油圧シリンダーの用途
If you have ever been deep underground in the launch shaft, standing next to the screw conveyor of an EPB (Earth Pressure Balance) shield, you know the environment I’m talking about. It’s hot, it’s humid, and everything is vibrating. The “muck”—that slurry...
執筆者 エピソード | 2025 年 12 月 30 日 | 油圧シリンダーの用途
When it comes to engineering machinery like tunnel boring machines, or TBMs as we call them in the trade, we’ve seen how crucial a solid hydraulic cylinder is for the attitude system—especially those direction correction cylinders that keep the beast on track...
執筆者 エピソード | 2025 年 12 月 30 日 | 油圧シリンダーの用途
You know the sound. You are standing in a damp tunnel, the shotcrete machine is humming, and suddenly the rhythm breaks. The hopper stops churning. The concrete, which was supposed to be flowing smoothly into the pumping cylinders, starts to bridge and harden. In my...
執筆者 エピソード | 2025 年 12 月 30 日 | 油圧シリンダーの用途
If you have spent any time around a wet-mix shotcrete machine, you know that sound. It’s not the engine humming; it’s that subtle, grinding noise of the feeding system struggling against a harsh, dry aggregate mix. In my 18 years of designing and fixing hydraulic...
