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...
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 scenario. It is 4:00 PM, your driver has just finished a pour, and the drum is caked in residual aggregate. He hits the switch to pop the water tank lid for the washdown, and… nothing. A groan, a hiss, maybe a dribble of hydraulic fluid, but that...
