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全苏起重运输机械制造科学研究所于61年提出的超重机专用减速器的新系列—u2型減速器系列一是按最优越的分流式設計的。高速級为分开式人字齿,而慢速級为斜齿輪对。它与原pM型減速器相比,在中心距相同时,它的传动功率要比pM型大2～3倍。如传动功率相同,它的重量比PM型輕。而且传动功率每瓩的消耗,也比PM型便宜50～60%。該所已完成的系列級数有:200;250;300;350;400;500;650;750;850;及10000共10級,并确定1963年全部采用。
All-Soviet lifting transport machinery manufacturing institute of science and technology put forward in 61 years special reducer reducer for the new series-u2 reducer series one is based on the most superior shunt design. High-speed split-type herringbone, and slow-speed helical gear pair. Compared with the original pM reducer, it has 2 ~ 3 times more power than the pM type at the same center distance. If the transmission power is the same, its weight is lighter than the PM type. And transmission power consumption per,, but also cheaper than the PM 50 to 60%. The series has been completed series: 200; 250; 300; 350; 400; 500; 650; 750; 850; and 10,000 total 10, and decided to 1963 all adopted.