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第 18 章 减速器和变速器 PowerPoint PPT Presentation


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第 18 章 减速器和变速器. §18-1 减速器. §18-2 变速器. §18-3 摩擦轮传动简介. § 18-1 减速器. 除了部分旋转类机械如鼓风机、水泵等直接由原动机驱动之外、绝大多数的工作机械其工作部分的转速与原动机的转速不一致,因此,需要协调原动机与工作机之间的速度。. 功用: 在机器中用来减速,也可以用来增速。. 组成: 由齿轮传动和蜗杆传动组成。. 齿轮减速器. 蜗杆减速器. 蜗杆-齿轮减速器. 类型. 行星齿轮减速器. 摆线针轮减速器. 谐波齿轮减速器.

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第 18 章 减速器和变速器

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18

18

18-1

18-2

18-3


18

18-1


18


18


18


18

S

S

S

f

f

f

S

f

S

S- f


18


18

S

f

f

S

f


18

--


18

18-2


18

I

I

II

II

I

I

II

II

I

II----


18

----

----

V


18

I

I

r1

r2

II

II

1) ----

r2

v =2 r2 = r11

i12 =1 / 2 =r2 / r1

1

2


18

r2

r1

R2

R1

I

I

II

II

2)

6

r1r2

i12 = R2 r1 / R1 r2

= r1 / r2 R1=R2

1

2


18

r2

R2

r1

R1

I

II

3)

r1r2

i12 = r1 R2 / R1 r2


18

V

r1

I

I

II

II

r2

4) V

V

r1r2

i12 = r2 / r1


18

----


18


18

4

3

2

1

3


18

2

1


18

i1=3.455


18

i2=1.944


18

i3=1.286


18

i3=0.909


18

A

iR=3.167


18

D1

Fp

F

a

Fp

D2

18-3


18


18

.

.

.


18

[p] /MPa

[q] /(N/mm)

f

- 0.03~0.05 25~30HRC --

--0.1~0.2 1.2~1.5HBS --

-0.1~0.15 1.5 Bb --

-

0.2~0.25 -- 40~80

-

0.25~0.35 -- 20~30

-

0.4~0.5 -- 5~15

-

0.45~0.6 -- 10~30

BbMPa


18

F N

F---K---

Fp

KF

Fp =

f

i

E--- MPa

2E1E2

K=

E1+E2

P1--- kW

a--- a =b/a,

0.2-0.4;

n2--- r/min

a

KP1 1290

a = (i1) 3 E ( )2

a f n2 i[H]

a

KP1 (i1)

a = 3090

afn2 i[q]


18

Fp

KF

Fp = sin

f

15

a/mm

KP1 1615

a = (i1) 3 E ( )2 (i1)

fzn2 i[H]

z

[h0.04D1, D1l=hcos ;=3 mm()

5 mm()

c 2 mm

a/ mm

KP1

a = 7590 (i1)

fzn2 i[q]


18

Fp

KF

Fp1 = sin1

f

KF

Fp2 = sin2

f

1

2

R/ mm

R---

R =B/R,

0.2-0.4;

R/ mm

1[H]

KH[H] ,

2


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