GearboxCreativity journey

Nhon VoSam Robertson

Brandon LayPandanikum Darren

Creativity journey

Refining problem

Solution: Tools and resources

Init ial design

Future consideration

Refining problems1

To design a gearbox that raises at least 8kg 1 metre as fast as possible, as small as possible and that uses the least electrical power.

How can we lift?

How can we achieve this?

By exploring a large array of gearing systems and choosing an appropriate solution that is efficient and effective.

Types of Gears S p u r g e a r s

Wo rm g e a r s

B e v e l g e a r s

H e l i c a l g e a r s

E p i c y c l i c g e a r s

Spur gears A d v a n t a g e s :

E a s i l y p r o d u c e d

Re l i a b l e a n d e ffi c i e n t

Pa r a l l e l t o i t s a x i s

D i s a d v a n t a g e s :

S l o w

Te e t h s t r e s s

C a n o n l y t r a n s f e r p o w e r

p a r a l l e l s h a f t s

Worm gears

A d v a n t a g e s :

C o m p a c t d e s i g n

M e s h i n g e ffi c i e n t

H i g h r a t i o s a r e a c h i e v a b l e i n s i n g l e

s t e p

D i s a d v a n t a g e s :

D i ffi c u l t t o m a n u f a c t u r e

Po t e n t i a l f o r h i g h p o w e r l o s s

Bevel gears

A d v a n t a g e s :

D i ff e r e n t o p e r a t i n g a n g l e s

S c a l a b l e

D i s a d v a n t a g e s :

D i ffi c u l t t o m a c h i n e

M u s t b e p r e c i s e l y m o u n t e d

Helical gears A d v a n t a g e s :

D u r a b i l i t y

L o a d d i s t r i b u t i o n

C a n t r a n s m i t m o t i o n t o

e i t h e r p a r a l l e l a n d r i g h t

a n g l e s h a f t

D i s a d v a n t a g e s :

D i ffi c u l t t o m a c h i n e

Epicyclic gears

A d v a n t a g e s :

C o m p a c t d e s i g n

H i g h p o w e r d e n s i t y

H i g h e ffi c i e n c y

D i s a d v a n t a g e s :

N o r o o m f o r e r r o r

A c c u r a c y e s s e n t i a l f o r a s s u r e l o a d

s h a r i n g

C a n o n l y t r a n s f e r p o w e r p a r a l l e l s h a f t s

Tools and resources

2

Solidworks Vi s u a l i s i n g d e s i g n s a n d

d r a w i n g s

Fi n i t e e l e m e n t a n a l y s i s

Vi s u a l i s i n g m o t i o n s

A n a l y s i n g m a t e r i a l , c o s t

a n d s u s t a i n a b i l i t y.

Mathematical model

O p t i m i z i n g t h e s y s t e m

M a n i p u l a t i n g v a r i a b l e s

A n a l y s i n g d a t a

References

E BS C O H O S T

O n l i n e re s e a rc h

Tu t o r a n d l e c t u re r

Initial design3

Reducing maximum axial length

Tr i a n g u l a r d e s i g n

i m p ro v e s c o m p a c t n e s s

6 1 m m i n p i c t u re

s h o w n

6 1 m m c a n b e f u r t h e r

re d u c e d

Prolong gear life M o re c y c l e s = f a t i q u e

N o n i n t e g e r g e a r

r a t i o s b e t w e e n m a t i n g

t e e t h

Pre v i o u s i s 4 2 : 1 9

O n t h e l e f t i s 4 8 : 1 3

Future consideration

4

Life cycle To o t h b e n d i n g s t re s s

Le w i s e q u a t i o n :

S u r f a c e d u r a b i l i t y

A b r a s i v e w e a r

S c o r i n g

P i t t i n g a n d S p a l l i n g

Mathematical Modeling

E n e rg y a n a l y s i s

Fa t i q u e

E ffi c i e n c y

D e r i v a t i o n o f o v e r a l l

t o o t h r a t i o

Thank you for your attention