ԲָƺǿУ(14_180)

ʼ:
:P=250 ;kW
Сת:n1=750 ;r/min
崫:i=3.15
ת,عʱ50000 ;h.

:
(1)ѡֲ
С:37SiMnMoV,,Ӳ320~340HB.
:37SiMn,,Ӳ280~300HB.
;ͼ14-1-83ͼ14-1-112MQҪȡֵ.
Hlim1=800  ;N/mm^2
Hlim2=760  ;N/mm^2
Flim1=320  ;N/mm^2
Flim2=300  ;N/mm^2
(2)ȷҪ
[1].Ӵǿȳȷľ
Aa=476 ;14-1-65
غϵ:K=2.0 ;ֶԳƲ,ٶе,غɽϴ
yd=0.8 ;14-1-69

ya=0.35 ;ya=0.38 14-1-61Բ.
:u=i ;=3.15
ýӴӦHp:Hp=0.9*Hlim2
СִݵתT1: T1=9549*P/n1
;ľa>= Aa*(u+1)*((K*T1)/(ya*u*Hp*Hp))^(1/3)
a1= Aa*(u+1)*((K*T1)/(ya*u*Hp*Hp))^(1/3)
a=503
[2].ȷģ,,,ݿ,λϵȼβ.

 ׼ģȲõһϵ,ڵģ
һϵ:
 1,1.25,1.5,2,2.5,3,4,5,6,8,10,12,16,20,25,32,40,50
ڶϵ:
 1.75,2.25,2.75,(3.25),3.5,(3.75),4.5,5.5,(6.5),7,9,(11),14,18,22,28,36,45

;mn=(0.0007~0.02)*a
˹ȡֵ: mn=7 ;[ע1]
z11=(2*a)/mn/(1+u)   ;z1/cos()
z1=trunc(z11)
z22=i*z1
z2=trunc(z22)
ʵʴ:i=z2/z1
ʵʳ:u=i
=acos(mn*(z1+z2)/2/a)
=9.5
ݿ:b=ya*a
СֶַԲֱ:d1=mn*z1/cos()
ֶַԲֱ:d2=mn*z2/cos()

λϵϳȷ ;[ע2]
n1=0.283999
n2=0.1

־ȵȼΪ7.

[3]ӴǿȺ

(1).ֶԲFt
Ft=2000*T1/d1
(2).ʹϵKa
Ka=1.5 ;ԭΪ綯,ƽ;Ϊˮĥ,еȳ,14-1-71.
(3).ϵKv    
ٶ:v=pai*d1*n1/60/1000
;ɱ14-1-80ʽ㴫ϵC
;C=-0.5048ln(z)-1.144ln(mn)+2.825ln(fpt)+3.32
;z=z1=30 fpt=25m()
C=-0.5048*ln(z1)-1.144*ln(mn)+2.825*ln(25)+3.32
Բȡ: C=8
Kv=1.25 ;14-1-74
(4)غɷֲϵKh
;ɱ14-1-88,װʱܺ
Kh=1.12+0.18*(b/d1)^2+0.23*0.001*b
(5)ݼغǷϵKha
;Ka*Ft/b=1.5*26400/180=220N/mm
;14-1-92:
Kha=1.1
(6)ڵϵZh
Zh=2.47 ;֦=0,=914'55".ͼ14-1-76
(7)ϵZe
Ze=189.8 ;sqrt(N/mm^2),ɱ14-1-95
(8)غ϶ϵZ
غ϶: Ŧ=b*sin()/pai/mn
غ϶: 

z1a=34/(1+0.38) ;z1/(1+n1)
z2a=107/(1-0.38) ;z2/(1+n2)

;ͼ14-1-72,
a1=0.79
a2=0.93

a=(1+n1)*a1+(1+n2)*a2

;ͼ14-1-79:
Z=0.775
(9)ϵZ

Z=sqrt(cos())
(10)С,ֵĵϵZb,Zd
;14-1-94ж,ڦŦ=1.315>1.0, ȡ:
Zb=1
Zd=1
(11)ӴӦh

h1=Zb*sqrt(Ka*Kv*Kh*Kha)*Zh*Ze*Z*Z*sqrt(Ft*(u+1)/(d1*b*u)) ;N/mm^2

;Zb*sqrt(Ka*Kv*Kh*Kha)*Zh*Ze*Z*Z*sqrt(Ft*(u+1)/(d1*b*u)) 
Zd=Zh=1,:h2=h1 ;N/mm^2

(12)ϵZnt
Ӧѭ:
NL1=60*750*50000.0           ;=60*n1*t
NL2=NL1/3.133        ;=60*n2*t
;ɱ14-1-96ʽ
Znt1=(10^9/NL1)^0.0706
Znt2=(10^9/NL2)^0.057
(13)ĤӰϵZlZvZr
;ɱ14-1-98,չɷĳָRz10>4m
ZlZvZr=0.85
(14)湤ӲϵZw
;ͼ14-1-90:
Zw1=1.08
Zw2=1.11
(15)ߴϵZx
;ɱ14-1-99:
Zx=1.0
(16)ȫϵSh
Sh1=Hlim1*Znt1*ZlZvZr*Zw1*Zx/H1
Sh2=Hlim2*Znt2*ZlZvZr*Zw2*Zx/H2
;Sh1,Sh2ﵽ14-1-100涨Ľϸ߿ɿʱ,СȫϵShmin=1.25~1.3Ҫ.ӴǿȺͨ.

(4)ֳǿȺ

(1)غɷֲϵKf

b=180 ;mm
h=2.25*mn ;mm

;a=(b/h)^2.0
;b=1+(b/h)+(b/h)^2.0
;nn=a/b

Nn=(b/h)^2/(1+b/h+(b/h)^2)

Kf=(1.262)^0.913
(2)غɷֲϵKfa

Kfa=Kha

(3)ϵYFa



Zv1=z1/(cos())^3
Zv2=z2/(cos())^3

ͼ14-1-98:

YFa1=2.17
YFa2=2.30

(4)ӦϵYSa
;ͼ14-1-103
YSa1=1.81
YSa2=1.69
(5)غ϶ϵY
;ɱ4-1-104
;b=acos(sqrt(1-(sin()*cos(n))^2))  ;
n=20
cosb=sqrt(1-(sin()*cos(n))^2)

Ŧn=a/(cosb*cosb)
Y=0.25+0.75/Ŧn
(6)ϵY
;ͼ14-1-109ݦ,Ŧ²:
Y=0.92
(7)ݸӦF

;Ŧ=1.667<2,ñ14-1-101з.

;F=Ft*YFa*YSa*Y*Y*Ka*Kv*Kf*Kf/b/mn

F1=Ft*YFa1*YSa1*Y*Y*Ka*Kv*Kfa*Kf/b/mn
F2=Ft*YFa2*YSa2*Y*Y*Ka*Kv*Kfa*Kf/b/mn

(8)ֵӦϵYst
;14-1-101
YST=2.0

(9)ϵYnt
;Ynt=(3.0*10^6/NL)^0.02
Ynt1=(3.0*10^6/NL1)^0.02
Ynt2=(3.0*10^6/NL2)^0.02

(10)ԳݸϵͳYrelT

;8.4.25)(1)ݸԲϵqn=Sfn/2/F,ñ14-1-102йʽм.
;ͼ14-1-98֪:

hfpmn=1.25    ;hfp/mn
Fpmn=0.38   ;Fp/mn

hfp=1.25*mn
Fp=0.38*mn
Spr=0 ;Spr=Pr-q ڸ;ͼ14-1-94

G1=Fp/mn-hfp/mn+n1 ;G1=Fp/mn-hfp/mn+n1
Ee=pai*mn/4-hfp*tang(n)+Spr/cos(n)-(1-sin(n))*Fp/cos(n)
H1=2/zv1*(pai/2.0-Ee/mn)-pai/3.0
1=-H1/(1-2*G1/Zv1) ;rad
1=1*180/pai

Sfn1=mn*Zv1*sin(60-1)+mn*3^0.5*(G1/cos(1)-Fp/mn) ;mm
;Sfn1=mn*Zv1*sin(pai/3-1)+mn*3^0.5*(G1/cos(1)-Fp/mn) ;mm

F1=mn*(Fp/mn+2*G1*G1/cos(1)/(Zv1*cos(1)*cos(1)-2*G1)) ;mm
;F1=mn*(Fp/mn+2*G1*G1/cos(1)/(Zv1*cos(1)*cos(1)-2*G1)) ;mm

qa1=Sfn1/F1/2

YrelT1=1.0  ;1.5<qa1<4

;-----------------------------------------
G2=Fp/mn-hfp/mn+n2  ;G2=Fp/mn-hfp/mn+n2
Ee=pai*mn/4-hfp*tang(n)+Spr/cos(n)-(1-sin(n))*Fp/cos(n)
H2=2/zv2*(pai/2.0-Ee/mn)-pai/3.0
2=-H2/(1-2*G2/Zv2) ;rad
2=2*180/pai

Sfn2=mn*Zv2*sin(60-2)+mn*3^0.5*(G2/cos(2)-Fp/mn) ;mm
;Sfn2=mn*Zv2*sin(pai/3-2)+mn*3^0.5*(G2/cos(2)-Fp/mn) ;mm

F2=mn*(Fp/mn+2*G2*G2/cos(2)/(Zv2*cos(2)*cos(2)-2*G2)) ;mm
;F2=mn*(Fp/mn+2*G2*G2/cos(2)/(Zv2*cos(2)*cos(2)-2*G2)) ;mm

qa2=Sfn2/F2/2

;1.5<qa2<4

YrelT2=1.0
 

(11)Գݸ״ϵYRrelT.
;ͼ14-1-118,ݸ΢۲ƽ10߶ΪRz10=12.5mʱ,
YRrelT=1.0

(12)ߴϵYz
;ɱ14-1-109Ĺʽ:
Yz=1.03-0.006*mn
(13)ǿȵİȫϵSf
;Sf=Flim*Yst*Ynt*YrelT*YRrelT*Yz/F
Sf1=Flim1*Yst*Ynt1*YrelT1*YRrelT*Yz/F1
Sf2=Flim2*Yst*Ynt2*YrelT2*YRrelT*Yz/F2

;Sfmin=1.6

;Sf1,Sf2ﵽ14-1-100涨Ľϸ߿ɿʱСȫϵҪ.
ֳǿȺͨ.