ȫԸߡҺѹʹ䲻㣬Ƶκβλʹá
2.6װ
װڲúڽΰͻúƵĻеۺϹʹҺѹ֧ϵǧﶥۺϹõҺѹֶҺѹ
ҺѹʵΪһҺѹǧﶥΪڲúʹãڻҺṹ˵IJҺû¶ĻҺܡʹʱĻ˲в۵úϣٽ֧ڶϡһעѹҺ˾ͽвúڣһעѹҺ֧ǰջء
ҺѹڲúIJáһװһѹҺƽڵıվߵѹ·ѭʽҺѹעҺǹעҺҪӹ̶·ҺѹʹõҺΪ35%黯͵ˮҺ ABCʽڹҺϵͳABͶҪѹҺ·A͵ĵѹҺõѹҺܷ䣬Bŵ棬ڸѹ·עҺǹעʽҺѹ֧ҺCΪעʽעʽҺѹ֧һҺϵͳעҺǹҺѹŵ档
2.7êװ
êװõĹΰͻǽϴĹ湤»ʱԹ̶֮áɵҺѹ֧ܺê̼ɣê̼ͷܡβӣʹҺѹ֧ܵıվ
3 巽ȷ
ΰͻ۲ɹIJúҺѹ֧豸ʹãɲúúµúͳȥ豸
ϵͳͼͼ3-1ʾ
ͼ3-1ͳϵͳͼ
3.1Ҫ
ûҪ3-1
3-1 Ҫ Ƴ ΰ m t/h m/s 17
150 900 1
綯 kW 160 3.2綯ѡ
ݿľ幤з͵İȫԣԱ֤бըΣյĺú˹ĿоȫҵҪɿתشǿЧʸߡѡ÷綯
ͺΪYZ400L1-10 Ҫ£ ʣ160kW ת٣587r/min ѹ1140V Чʣ91.5% 0.79
γߴ磺18652120855 950 2400kg 3.2.1
еļ㹫ʽΪ
Q?3.6A??v
ʽ
Qΰͻt/h AвʱĶm2 ?Ϊϵɢܶȣkg/m3 ?תϵ vΰ٣m/s
Q?3.6A??v
=3.6764tan20?0.970.961
=932t/h900t/h Ҫ
3.3ܴȼȵķ
3.3.1ܴȵȷ
iܴ
3.3.2ȵķ
ڽж༶ϵͳʱȷһҪڣܷ䴫ȣֱӰ쵽ϵͳߴ硢ṹɱ༶ϵͳȵȷԭ
1.ĴһӦڳֵΧڣӦֵԷ䴫ʽĹص㣬ʹСΡ
18
2.ӦߴЭṹȳƣ˴˼䲻ӦײдӦڰװ
3.ʹijӽȣҪﵽǿȡ
4.ʹеĴֽеȴȣӶʹȽϷ㡣 Ϊ:
3.4
3.4.1תټ
ӵ綯Ϊᡣ n1?587r/min
n3?n/i1?587/3.3525?175.1r/min n4?n3/i2?175.1/3.1755?55.14r/min n7?n4/i3?55.14/2.757?20.0r/min 3.4.2Ṧʼ
p1?p??1??2??3??4
?160?0.99?0.99?0.97?0.97
?147.55kw
p2?p1??2??3??4
?147.55?0.99?0.97?0.97
?137.44kw p3?p2??2??3??4
?137.44?0.99?0.97?0.97
?128.02kW
p4?p3??2??3??4
?128.02?0.99?0.97?0.97
?119.25kW
ʽ ?1Ч ?1=0.99
?2ʽԲЧ ?2=0.97 ?3Ч ?3=0.99
3.4.3Ťؼ
T1?9550P?147.55/587?2400.52N?m 1/n1?9550 T2?9550P2/n2?9550?137.44/175.1?7496.01N?m
.4N?m T3?9550P3/n3?9550?128.02/55.4?22068 T4?9550P4/n4?9550?119.25/20?56941.8N?m
3.1
19
3.1 ѡֲ
ֲִ ֶѡ18CrTi̼
HRC 6062
P/kW 147.55 137.44 128.02 119.25 תn/rmin?1 587 175.1 55.4 20 ת T/Nm 2400.52 7496.01 22068.4 56941.8 3.3525 3.1755 2.757 ýӴӦ[?H] ʽ
?Hlim1=1572N/mm ?Hlim2=1572N/mm
2
Ӵƣͼ?Hlim
ӴǿϵZN ӦѭN ʽ
N1=60n1jLh?60?587?1?(20?360?10)=2.34?109
N1=2.34?109
N2= N1/i=2.34?109/3.3525?6.98?108 N2= 6.98?108
ZN1ZN2 ZN1=1 ZN2=1.05 ӴǿСȫϵSHmin
SHmin=1 [?H1]?1572?1/1 [?H2]?1572?1.05/1 Ӧ[?F] ʽ, [?F] ƣͼ?Flim
ǿȶϵN YN1=YN2=1 ǿȳߴϵYXYX=1
ǿСȫϵSFmin SFmin=1.4
[?F1]?1100?1?1/1.4?785.7N/mm
[?F1]?785.7N/mm [?F2]?1100?1?1/1.4?785.7N/mm [?F2]?785.7N/mm
ưӴƣǿƼ
20
Y