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of Technology, Mechanical Engineering Department Nguyen Tan Tien Nguyen Tan Tien.. Theory of Machine.[r]
(1)HCM City Univ of Technology, Mechanical Engineering Department
HCM City Univ of Technology, Mechanical Engineering Department Nguyen Tan TienNguyen Tan Tien
Theory of Machine
Theory of Machine 7.017.01
7 HI
7 HIỆỆU SUU SUẤẤTT
HCM City Univ of Technology, Mechanical Engineering Department
HCM City Univ of Technology, Mechanical Engineering Department Nguyen Tan TienNguyen Tan Tien
Theory of Machine
Theory of Machine 7.027.02
d ms A A
≡
ϕ
d ms d
ms d d ci
A A A
A A A A
− = − =
≡ 1
η §
§1 1 ĐĐịịnhnhnghnghĩĩaa
HiHiệệuususuấấttηηllààttỉỉssốốgigiữữaacơngcơngccóóííchchvvààttổổngngcơngcơngmmààmmááyytiêutiêuththụụ A
Acici: : ccơngơngccóóííchch A
Add: : côngcôngphphááttđđộộngng((côngcôngmmààmmááyytiêutiêuththụụ)) A
Amsms: : côngcôngccủủaallựựccma ma ssáátt
HHệệssốốnăngnăngsusuấấttφφ
(2)HCM City Univ of Technology, Mechanical Engineering Department
HCM City Univ of Technology, Mechanical Engineering Department Nguyen Tan TienNguyen Tan Tien
Theory of Machine
Theory of Machine 7.037.03
§
§2 2 HiHiệệuususuấấttccủủaammộộttchuchuỗỗiiđđộộngng I
I ChuChuỗỗiinnốốiititiếếpp
1
η η2 η3 ηi ηn
d A
1
A A2 Ai
n A
L L
XXééttchuchuỗỗiiđđộộngngnnốốiititiếếppnnththàànhnhphphầầnn
A
Add: : ccôngôngđưađưavvààoochuchuỗỗiiđđộộngng
A
Ann: : côngcôngllấấyyrarasausauchuchuỗỗiiđđộộngng
A
Ai i : : cơngcơngcịncịnllạạiisausaukhikhiqua qua ththàànhnhphphầầnnccóóhihiệệuususuấấttηη
i i
HiHiệệuususuấấttchuchuỗỗiinnốốiititiếếpp
d n n n n d n A A A A A A A A A A A A 1 2 1 L − − − = ≡ η − ≡ i i i A A η η η η η η L − = = ⇒ n n d n A A ∏ = = ⇒ n i i η η
HCM City Univ of Technology, Mechanical Engineering Department
HCM City Univ of Technology, Mechanical Engineering Department Nguyen Tan TienNguyen Tan Tien
Theory of Machine
Theory of Machine 7.047.04
§
§2 2 HiHiệệuususuấấttccủủaammộộttchuchuỗỗiiđđộộngng I
I ChuChuỗỗiisong song songsong
1 η n η A A n A M d A A′ A′ n A′
XXééttchuchuỗỗiiđđộộngngsong song songsongnnththàànhnhphphầầnn
A
Ad d : : ccôngôngđưađưavvààoochuchuỗỗiiđđộộngng A
Aii’’: : côngcôngththàànhnhphphầầnnđưađưavvààoo
th
thàànhnhphphầầnnccóóhihiệệuususuấấttηηii A
Ai i : : cơngcơngcịncịnllạạiisausaukhikhiqua qua th
thàànhnhphphầầnnccóóhihiệệuususuấấttηηii
HiHiệệuususuấấttchuchuỗỗiisong song songsong
d ci A A ≡ η ′ + + ′ + ′ = + + + = n d n ci A A A A A A A A L L 2 v
vớớii