【机械专业英语】机械专业英语翻译AtthispointIthoughtIwasreadytopublishmy...

机械专业英语翻译At this point I thought I was ready to publish my first book on Stirling engines. I called Brent again, and I soon realized we had a new design requirement. He looked over the design and watched the videos. His expert advice: Build an engine with a rotating flywheel! Brent expressed that for many people reciprocating engines look like an engine that is trying to start but never quite makes it. If I wanted a book that would grab people＇s attention, I needed to have an engine that behaved in a familiar manner. That is why there are three engines described in the book. The second and third designs are modifications of the first design, each with the addition of a revolving flywheel. Each time I built one of these models I would learn and improve on previous attempts. I made enough improvements in the subsequent models that I eventually went back and rebuilt the first reciprocating engine and included the improvements. So if you follow my instructions here, you will be building the latest and most improved versions.Modifying the design for the addition of a revolving flywheel was not difficult to do. Engine #2 takes the flywheel off of the reciprocating drive axle and moves it onto its own rotating vertical axle. The axles maintain the vertical orientation used in the first engine. The flywheel mass still stores kinetic energy, but as a rotating wheel rather than a reciprocator. It is a very efficient design and is fun to operate. It is one of my personal favorites.Engine #3 was simply an attempt to build a Stirling engine with a rotating flywheel and with as few moving parts as possible. The horizontal axis of the flywheel made it necessary to use bearings. The bearings were made from glass beads instead of steel ball bearings. The beads cost＄0.10 each instead of ＄17.00! The polished metal shaft passing through the bead has a thin coat of silicone lubricant to help fight the friction in the homemade bearings. Engine #3 is not as efficient as the first two because the horizontal drive axle bearings introduce additional friction. I have succeeded in getting Engine #3 to run from the heat of my hand, but only when using helium in the pressure chamber. It will run well on direct sunlight and other low temperature differentials. The glass bead bearings work well enough that you will see them in all three designs.Every step in this Stirling journey has been a wonderful learning experience. Building these engines has taught men new tricks and skills for working with metal and acrylic. I have learned how to cut , bend, weld, and polish acrylic glass, and best of all, how to make several affordable Stirling engines that work from the heat of the hand! 英语