7K90MCnullC V / (沪东重机铸造分公司,上海 200129)K 1 : Y V - 3 q , H 9 E / , k 7K90MCnullC V n q b V / T b1 o M : ; V ; E ; / m s | : U664. 21null null D S M : Bnull null c I | : 1005null9962( 2007) 02null0021null02Abstract: The prototype of the 7K90MCnullC bearing supportwas successfully trialnullproduced by learning the experience ofproducing sim ilar castings and using numerical simulation technique. This paper introduces the casting technology of thebearing support.K ey words: diesel engine; bearing support; numerical simulation; casting technologyT e : ,3 , = b1971M 3 , 1997M W : v ) 8 ,C VY / / T b1null - null null null 7K90MCnullC V S , V 9 n Q / 3 bM - ,N q v 9 F , V 9 r 11 b - V 55% 60% q , K 9 1 r 18 ,7 ? K v K 16 ,y N / 3 4 v v 9 F b V / b2null null null V , 1 p , 1 o q 1 q W % 9 , V e b w V r 3 ? K ,y N + N S 9 b 7K90MCnullC V MCC V ,7 MC V ,y N / H , 3 MC V( : , d ) . d V L , L =f bN / + + :( 1) d ) H g ,7 8 g , g ,9 V b(2) d Z K v B g V S ? g , 8 F ? 4 b V S ? g r T 1 g 1 z ,V B h b l g g b( 3) : , d M , T C H 5 T bi 8 Y : , dC Y ,7 ? C / b Z E ,y q bC ? C b( 4) / | H , d | g / S , H 1 C S ,! S v b( 5) V 8 K , w F H ! 3. 5 g , b( 6) , H W e 240 = , null100 g , null60 g b( 7) 1 o d ? , d bB M , a/ 24y b! , K v a K V 9 % E 9 bV E T s , q d ) g d u q 8 200mmP , , d ? b7 Z C d ,y N A T B , W g 9 v ,i = M , g N r b H W 1 K V 9 % E ,9 V % E b ,4 K v V , B 5 % , V B ? 3 I 5 b3null n null null q 3 B Q , ! | n , H a ) a T V | n :( 1) V g 16 000 kg,null21null Z / / null 2007M 2 (9 70 ) V - K v 9 ? b / V 4| a5| ,i M W V 1.5 g bi O i H W ; b(2) V - B b G l , V b bV 1 2| l 60%, g 40%, F , V b( 3) V (A v 30 ), ,A ? ,P 8 b H V T b( 4) SiCax 9 4 | s , b T | e n b(5) % 4 9 F Q 1 , ,P K 4 b( 6)J Q H W a ,1 P r JQ 1 bi Q 9 F i d ,9 F i b( 7)? S p ,p