一、前言永田制作所自1933年以来已生产了约400台永田跳汰机,即作U型振荡的鲍姆跳汰机。1967年以后永田跳汰机的机体内增设了可使波高均匀的导流板,其后改造为无导流板的V型机体。1980年通过使用跳汰室宽5米的V型机体所做的试验,证实了其波高的均匀性。现在,跳汰室宽3.75米的永田V型机体的跳汰机已在正常 I. Introduction Nagata Mfg. Has produced about 400 Nagata jiggers since 1933, making it a baum jig for U-shaped oscillations. After 1967, Nagata Jig’s body was added a deflector that made the wave height uniform, and then transformed into a V-shaped body without a deflector. Tests conducted in 1980 on a V-shaped body 5 meters wide using a jig were validated for wave height uniformity. Now, the Jigger V-body jig of 3.75 meters in width is normal