西工大机械原理第八版答案 (? - 百度文库 ر

2ֻļγߴ磬ԱߦLͼͼ Բת۵ı۳ R?Lsinֵ⾶ S?Lcos h?L(sin?Z?300sin?300cos?66?150mm ?259.81mm

?Z??ZZ66ֹ뾶 r??R?r?b?150?25?12.5?112.5mm

?cos??1)???300(sin??cos??1)?25?135mm

3㲦̵ת

赱תһʱֵ˶ʱΪtdֹʱΪtjֹʱӦȡΪ tj 30 s

ֻ˶ϵ k=(Z-2)/2Z=1/3 ͣЪϵk=1-k=tj/t,ɴ˿ɵòתһʱΪ

t?tj(1?k)?30(1?13)?45(s) ʲ̵ת

114n??60??60?(r/min)

t453

е˶ⶨ

1ԷлϷʽϷʽͼϻͬʱ˵

ʽ1-2-3͹ֻ?2ʽ1-2-5͹ֻw1v2?11-2'C4-3ϵ?41-2-3-4-5˻v4

?11-2-3-4͹ֻ?3ʽ3-4-5-6-7-8͹ֻv8w11-2-3-4ĸ˻w2ֻw5

ʽ 2ͼʾij-ϻУa1bcֱCDϣ֤cĽٶȦc12ҡ3ĽٶȦ123 ֮ĹϵΪ

c=3(rb+rc)/rc-2(ra+rb)/rc+1ra/rc

֤

1c-b-3ɵϵ

wb?w3r??c

wc?w3rbwc?rb?rcrw3?bwbrcrc(a)

2a-b-2ɵϵ

wb?w2wb?w2r???a

wa?w2w1?w2rbwb?rb?rarw2?aw1rbrb(b)

3ʽa(b)ɵ

wc?

rb?rcr?rrw3?baw2?aw1 rcrcrcƽ

1ͼʾУ֪lAB=0.1m,lBC=0.33m,n1=1500r/minΪ丽Q1=21NQ2=25N, Jc2=0.0425kgm2, c2BľlBc2=lBC/3ȷͼʾλõĻĹԼ˵ܹ

1?l˶ͼͼa

2 ˶?v?aٶͼͼbͼͼcͼc

ac??ap?c??75?24?1800(m/s2) ??75?28.3?2122.5(m/s2) ac2??ap?c2taCB?n?c?75?22a2??a??5000(rad/s2)ʱ룩

lBClBC0.333 ȷ

3PI3?m3ac?Q321ac??1800 ?3853.2(N) g9.812PI2?Q225ac2??2122.5 ?5409(N) g9.81MI2?Jc2ac2?0.0425?5000 ?212.5(Nm)˳ʱ룩

ܹPI?2?PI2 ?5409(N)

lh2?MI2PI2?212.55409 ?0.0393(m)

??PI3PI?2ʾͼaϣ

2ͼʾΪһλãPΪڻϵתABСԲΪĦԲԾڴλʱABϵʵ