Machine design project (mmh mdpr310423) summary table of design calculation parameters

HO CHI MINH CITY UNIVERSITY OF TECHNICAL PEDAGOGYMANUFACTURING ENGINEERING FACULTYDEPARTMENT OF MACHINERY DESIGN FUNDAMENTALSMACHINE DESIGN PROJECT MMH:... Diameter of small pulley 160mm

HO CHI MINH CITY UNIVERSITY OF TECHNICAL PEDAGOGY



MANUFACTURING ENGINEERING FACULTY

DEPARTMENT OF MACHINERY DESIGN FUNDAMENTALS

MACHINE DESIGN PROJECT (MMH:

MDPR310423)

SUMMARY TABLE OF DESIGN CALCULATION PARAMETERS

TOPIC /

PROJEC

T:

…………

………

HD

SCORE:

…………

………

PB

GVHD ………

: ………

SVTH :

………

………

GROU P:

………

………

City Ho Chi Minh, month …… years 20……

Part 01: WORK SHAFT

Power P (kW) 4,719

speed n(v/p) 67.57

Part 02 : SELECT ENGINE TRANSMISSION RATIO

1 Electric motor parameter table

M8B

2 Transmission ratio distribution table

Shaft

Data

Transmission ratio

Rotation (v/p) 7 15 226,984 72 , 06 72 , 06 Torque (N.mm) 8 0915 242133 724931 631763

Part 3 Belt

1 Input

P = 6.058 (kW)1

n 1 =715(v/p)

u = 3.3612

2 General parameters of the belt:

Diameter of small pulley 160mm Diameter of big pulley 560 mm

The wrap angle of small pulley 145°

The force acting on shaft 914.53 N

Part 04: GEAR DRIVE

1 Input :

Power on driving shaftP 1 =5 , 755 kW

+ Rotation speed on driving shaftn 1 =226 , 984 rpm

+ Transmission ratio u=ubr¿ 3.15

+ T 1 =24213 1 N m

2 HELICAL GEAR

Shaft distance aw _ ¿195 mm

Width of teeth bw _¿ 64,5

Transmission ratio 3.15

Angle of inclination of teeth 8° 6 '

Number of gear teeth

z1=3first

z2=98

Pitch circle

d = 93 mmw1

d = 297 mmw2

da2 = 303 mm

df2 = 288 mm

Transmission ratio error

- Initial transmission

u=nđc

u ct

=3,15

Reality transmission:

u=983 1=3,1 Transmission ratio error :

∆ u=|3,16 −3,15|

3,15 100 %=0 ,317 % <4 ( Satisfy )

Part 5 :Shaft Design Calculation

1 Force analysis diagram on gears

Shaft 1

Part 6 :

Shaft I:

bearing

symbol

d(mm) D

(mm)

b = T (mm)

r (mm)

r 1 (mm)

C (kN) Co ( kN)

46307 35 80 21 2.5 1,2 33.4 25.2

Axis II:

bearing

symbol

d(mm) D (mm) b = T

(mm)

r (mm)

r 1 (mm)

C (kN) Co ( kN)

Part 7

Thickness Body: , 

Lid , 1

 = 0,03 a + 3 > 6

1 = 0,9 

 = mm9

1 = 8 mm Tendons increase stiffness:

Thickness, e

High, h

Slope

e = (0,8 1) 

h < 58 About 2

e = 8mm

h = 50 mm

Diameter:

Foundation bolts, d1

Bolt next to socket, d2

Cover and body flange bolts, d3

Socket cover screw, d4

Screw connect the door cover, d5

d1> 0,04 a + 10 = 20>12mm d2 = (0,7÷0,8) d1 d3 = (0,8÷0,9) d2 d4 = (0,6÷0,7) d2 d5 = (0,5÷0,6) d2

d1 = 18 mm d2 = 14 mm d3 = 12 mm d4 = 8 mm d5 = 8 mm Flange connecting cover and body:

Box body flange thickness, S3

Box lid flange thickness, S4

Width of cover and body flanges, K3

S3 = (1,4÷1,8) d3 S4 = (0,9 1) S3 K3 = K2-(3 5)

S3= 18 mm S4 = 18 mm K3 = 40 mm

Shaft bearing size:

Outside diameter and screw hole

center: D , D3 2

Width of bolt face next to socket: K2

Center of bolt hole next to socket: E và C2

Shaft 1:

D3(1) = 30 + 4,4 d4 D2(1) = 30 + (1.6~2) d4 Shaft 2: (table 9.9) D3(2)

D2(2)

K2 = E + R + (3 5) mm2 2

E 1,6.d2 2 R2 1,3 d2

D3(1)=63 mm D2(1)=43 mm

D3(2)=80mm

D2(2)=65mm

K2 = 45 mm E2 = 22 mm R2= 18 mm

Box base:

Thickness: when there is a convex part

S1

Width of box base: K 1and q

S1 (1,3 1,5) d 1 K1  3.d1

q K + 2  1 

S1 = 26 mm, 17 K1 = 54 mm

q = 72 mm Gaps between details:

Between the gear and the inner wall of

the box : 

Between the top of the large gear and the

bottom of the box : 1

 (1 1,2) 

1 ≥ (3 5) 

 =10 mm

1 = 40 mm

Number of foundation bolts : Z

Table 18.5/92 (2) Choose screws M8x22

(200 ÷ 300)

L, B: Length and width of the box

Z = 454 172300+ = 3

Part 8: TOLERANCE

1 Unified recording of 3 main sizes:

a Axis I:

- The ball bearing inner ring uses ø 35 k6

- The bearing outer ring uses H7 ∅ 40 H 7

- Install gears, pulleys, and couplings using H7/k6 ∅ 40 H 7/k 6

b Axis II:

- The ball bearing inner ring uses k6 ∅ 5 0 k

- The bearing outer ring uses H7 ∅ 50 H 7

- Install gears, pulleys, and couplings using H7/k6 ∅ 52 H 7 /k 6

2 Mounting position tolerance parameters of the shafts:

Axis

Bulong vòng

Ren

d c l

A B C D E G H I K L M N O P Q R S M27X

- Que thăm dầu:

Chức năng: khi vận tốc bánh răng được ngâm trong dầu Chiều cao mức dầu trong hộp được kiểm tra qua thiết bị chỉ dầu là que thăm dầu.

Department of Machine Design Fundamentals 19| P a g e