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򵥣ȫԸߡҺѹ׽ʹ䲻㣬Ƶκβλʹá

2.6װ

װڲúڽΰͻúƵĻеۺϹʹҺѹ֧ϵǧﶥۺϹõҺѹֶҺѹ

ҺѹʵΪһҺѹǧﶥΪڲúʹãڻҺṹ˵IJҺû¶ĻҺܡʹʱĻ˲в۵úϣٽ֧ڶϡ⶯һעѹҺ˾ͽвúڣһעѹҺ֧ǰջء

ҺѹڲúIJáһװһѹҺƽڵıվߵѹ·ѭʽҺѹעҺǹעҺҪӹ̶·ҺѹʹõҺΪ35%黯͵ˮҺ ABCʽڹҺϵͳABͶҪѹҺ·A͵ĵѹҺõѹҺܷ䣬Bŵ棬ڸѹ·עҺǹעʽҺѹ֧ҺCΪעʽעʽҺѹ֧һ׹ҺϵͳעҺǹҺѹŵ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

ݿ󾮵ľ幤з͵𻨵İȫԣԱ֤бըΣյĺú˹Ŀо԰ȫҵҪɿתش󣬹ǿЧʸߡѡ÷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

3.3.2ȵķ

ڽж༶ϵͳʱȷһҪڣܷ䴫ȣֱӰ쵽ϵͳߴ硢ṹɱ༶ϵͳȵȷԭ

1.ĴһӦڳֵΧڣӦֵԷ䴫ʽĹص㣬ʹСΡ

18

2.ӦߴЭṹȳƣ˴˼䲻ӦײдӦڰװ

3.ʹijӽȣҪﵽǿȡ

4.ʹеĴֽеȴȣӶʹ󻬱ȽϷ㡣 Ϊ:

3.4

3.4.1תټ

ӵ綯Ϊ񡢢򡢢󡢢ᡣ 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

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