氣流輸送中底板振動裝置的研究.pdf

1、東北農業(yè)大學碩士學位論文氣流輸送中底板振動裝置的研究姓名：周福君申請學位級別：碩士專業(yè)：農機設計與制造指導教師：蔣恩臣19991101S t u d i e s o i lt h e V i b r a t i n gM e c h a n i s m i nt h e A i r S u t t o n P i p eZ h o uF u ) u nN o r t h e a s t A g r i c u t m r a lU n

2、i v e r s i t yA b s t r a c tT h eP e r f o r m a n c eo fav i b r m i n gm e c h a n i s mw a ss t u d i e di nt h i s p a p e ri no r d e rt os o l v et h ep r o b l e mo f g r a i nb l o c k ．i nt h es u c t i o np i

3、 p ea tt h er e a l “ o ft h es t r i p p i n gr o t o rw i t ha i rs u c t i o n ．F i r s to f a 1 1 ．t h ec h a r a c t e r i s t i c so f t h e a i rf l o wi n t h es u c t i o np i p ea n d t h ee f f e c to ft h ev

4、i b r a t i n g m e c h a n i s m o n i tw a sm e a s u r e d ．T h e r e s u l t ss h o w s t h a tt h ev i b r a t i n g b a s ep l a t eh a s1 i f ' t i ee r i e c t o n t h ea i rf l o w , a n d t h e a i rf l o w

5、 s p e e d a tt h e t w o s i d eo f t h ef r o n to f t h e s u c t i o np i p ei sl o w e r t h a n o t h e r p l a c eT h i si so n eo f t h e m a i n r e a s o nf o r g r a i nb l o c k i nt h e a r e a ．T h em o t i

6、 o nc h a r a c t e r i s t i c s o ft h e b a s e p l a t e o ft h es u c t i o n p i p ea n dt h eg r a i n ’sd y n a m i cc o n d i t i o n w h e ni t m o v ew i t h t h e v i b r a t i n g b a s ep l a t e w e r ea n

7、 a l y s i s a n dc a l c u l a t e db yc o m p u t e rs i m u l a t i o n ．A sar e s u l t s ，t h er e q u i r e m e n tf o rt h eg r a i n t oh a v et h er e a r w a r dm o v i n g t e n d e n c yb u t n o tt om o v e

8、，a n d t h er e q u i r e m e n t f o rt h eg r a i n t ob et h r o w nu pf r o mt h ep l a t e w e r em a d e ．M e a n w h i l e ，t h eo p t i m u mc o m b i n a t i o no ft h ev i b r a t i n gf r e q u e n c y a n dt

9、h ev i b r a t i n ga m p l i t u d eo f t h eb a s ep l a t ea n dt h ei n f l u e n c eo ft h eb a s ep l a t e ’si n c l i n a t i o nw e r et h e o r e t i c a l l ya n d e x p e r i m e n t a l l ys t u d i e d ，p u

10、 r s u i n gt h ee n h a n c i n go f t h eg r a i n ’st r a n s p o r t a t i o nw i t ht h ea i ra n dt h el o s sr e d u c t i o no f g r a i no nt h ef r o n to f t h e b a s ep l a t e T h e o p t i m u m p a r a m

11、e t e r sa r ea sf o l l o w s ：1 ) T h e v i b r a t i n g f r e q u e n c y i s3 5 0 ( 1 ／r a i n ) ．2 ) T h e v i b r a t i n ga m p l i t u d e a tt h ef r o n to f t h e b a s ep l a t ei s2 0 m m ．3 ) T h e b a s e

12、 p l a t e ’si n c l i n a t i o ns h o u l db el e s st h a n5 ．5 。．T h r o u 曲e x p e r i m e n ta n a l y s i s ，t h ea i rf l o wf o r c ea c t e do ng r a i no nt h eb a s ep l a t ew a sm e a s u r e d ，a l s o ，a

13、f e W m i n i m a la i rf l o ws p e e d sW a s d e t e r m i n e du n d e r t h eo p t i m u mv i b r a t i n gp a r a m e t e r s a n d d i f f e r e n ti n c l i n a t i o n so f t h e b a s e p l a t e ．B y m e a n s

14、 o f t h eu l t r a - s p e e dc i n e m a t o g r a p h y , w e c a n s e et h a tt h ef a c eg r a i no f t h eg r a i nb l o c kw a sf i r s tt h r o w nu pf r o mt h eb a s ep l a t e ．a ss o o na si t c f l n a ei n

15、 t ot h ea i r , i tb e c a m eaf r e eo n e ，a n dt h ea i rf l o wf o r c ea c t e do n t h eg r a i nb e c a m eS Og r e a tt h a tt h eg r a i na l m o s tm o v e d i nt h eS a m ed i r e c t i o nw i t ht h ea i r ,

16、 g r a d u a l l ya l lt h eg r a i no nt h eb a s ep l a t eW a s t r a n s p o n e d a w a y f r o m t o p t ob o a o mT h ea b o v ee x p e r i m e n ta n dt h e o r ya n a l y s i ss h o w st h a tt h eb l o c k e dg

17、 r a i nC a nb et r a n s p o r t e da w a yb yt h ev i b r a t i n gb a s ep l a t eu n d e rt h eo p t i m u mv i b r a t i n gf r e q u e n c ya n d v i b r a t i n g a m p l i t u d e a n d w h e n t h e i n c l i n