机械专业外文文献翻译@外文翻译--V带传动

in of So to to it is of of of of a a we in of a a an is a in an is to an a a a is is an to of a it is to at by in an as a of of to it in in is a of of in of to be as as as a of on in an a in in By of it is in a to at in to be as of by of of of PM or of is by of To PM or is by of on on of of is by of a In or a of a is in by PM or to a of so of by or to be of of It is to be or is of of of is to is to of Of a he/as of or of to be of of is to in of to As to is of of So it is to of to in be of of is be by by in at in to of be be at or is is 4 8 ,of in a in by of is it be of or is of of is 5 m/s, we as of is 5 0 m/s, we is 5 5 , we or we to as is be in or is by on an in of of is in be is is as we of we of of is In to we to it =25 45m/应采用球墨铸铁、铸钢或锻钢，也可采用钢板冲压后焊接带轮。 小功率传动时，带轮可以采用铸铝或塑料等材料。带轮由轮缘、腹板和轮毂三部分组成。 市场上带轮的槽宽是变化不定的，带轮的有效直径也 是 变化 不定的，因此，传动比的合理改变得到了保证。通常，小带轮用作主动轮，大带轮被用作从动轮。 了解了带传动的一般结构之后，还要对带传动进行受力分析，其中主要是带的受力分析，带的受力主要是拉力和应力两种，其中应力又可以分为拉应力、弯曲应力和离心应力。在设计时，应当使拉力和应力之和均小于带的极限值。为了避免带出现打滑现象 ，还 应当使带传动所传递的功率、带的有效拉力和带速三者之间满足一定的关系，即 p=传动的设计准则一定要得到满足，即在传递功率时不打滑，同时具有足够的疲劳强度和一定的寿命。