This paper refers to a new investigation to improve the load carrying capacity of the crossheadpin bearing in a 2-stroke cycle diesel engine. By using a specially equipped journal with a pair of eccentric sections the oscillating bearing can be forced to move up and down just like a piston-pin bearing in a 4-stroke cycle engine. Such a squeeze motion of the oil-film between a journal and a bearing has an ability to increase the oil-film thickness. Then, from the theoretical analyses on effects of various bearing shapes the following features and optimums for design became evident. (1) According to the change of an oscillating direction each sliding face is alternatively unloaded and the oil-pumping ability is generated. (2) In order to keep the oil-film pressure lower than the elastic flow pressure of a bearing metal and make the oil-film thickness as large as possible the next designing points are needed. (i) The ratio of a radial clearance to the radius is about 5 × 10-4 . (ii) The eccentricity between journals is as large as the radial clearance. (iii) The width ratio of a main journal to the whole bearing is about 0.7.
On a ship many kinds of heat exchangers are installed and cooled by sea water, therefore, the cooling tube is attacked by corrosion. But effective methods to protect cooler and piping were not, in general. To prevent the cooling tube from corrosion the iron ion generator has been made, but this equipment is not known very well. So principle of the iron ion generator, how to apply to sea water cooling system and data taken from actual installation and experiment are described in this paper so that machinery outfit designer and user can understand this equipment and application.
This device has the following features different from a direct burning system observed in the general incinerators. It can process the combustible garbages through thermal resolution and burn the resolved gas as fuel on the first step. On the second step the remaining carbonized matter can be burned. Both steps are combined skillfully in this method. The device can stinklessly burn without smoke various kinds of combustible garbages, and can be conformable with the provision of “International convention for the prevention of pollution from ships, 1973”.