3 Y: U! h: M0 G" U$ ~/ a合适的选型,对用户本身和空压机设备都有益处,选型过大浪费,选型过小可能造成空压机长期处于加载状态或用气不够或压力打不上去等弊端。 6 i, u* F0 \4 m! J( G + l( ]' d A, a+ x0 r3 x 2 ^; B$ D# d2 C' i% l& S( a; |8 b+ B( L a) o
功率与工作压力、容积流量三者之间的关系 2 D, ` Y, D: S3 _/ s6 x& b- v% _在功率不变的情况下,当转速发生变化时,容积流量和工作压力也相应发生变化;例如:一台22KW的空压机,在制造时确定工作压力为7bar,根据压缩机主机技术曲线计算转速,排气量为3.8 m3/min;当确定工作压力为8bar时,转速必须降低(否则驱动电机会超负荷),这时,排气量为3.6 m3/min;因为,转速降低了,排气也相应减少了,依此类推。 ! j# e3 m* G$ t. t6 R, W5 F- b7 R7 Y" ~8 _( K
功率的选型是在满足工作压力和容积流量的条件下,供电容量能满足所匹配驱动电机的使用功率即可。 6 P9 r' \0 a& z0 P i( L0 r1 ? l* T. N% f7 z
因此,选配空压机的步骤是:先确定工作压力,再定相应容积流量,最后是供电容量。作者: kyjcs 时间: 2010-11-5 15:52 博莱特空压机点comp-china点com作者: KissMaya 时间: 2010-11-5 16:13 本帖最后由 KissMaya 于 2010-11-5 16:34 编辑 ( v& \+ U6 O+ b* h1 |! V: ]5 z6 X - [4 H. i) y" YWhen the customer wants to buy a new compressor, he has to prepare the following questions. 6 L3 _% G; H$ U9 W% U8 u2 k3 i! ~% L* q. T5 k( Z" a8 r
1. Which air quality he needs? 6 k6 @4 _4 C( s0 J# a$ ~: dit decides between oil-free and oil-lubricated machines# J- u; g+ b6 Q' T' D7 ?5 u
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2. Will it be a base load machine? a peak load machine? or both functions? 9 |5 N9 o3 G" p6 z8 ~: Sit decides between machines with or without frequency convertor- x5 ?# M7 z- t% Y
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3. How many hours will the machine be running yearly? 8 w* k, \" }5 j; Y* t$ Y8 Jit decides whether it will be an energy-saving or normal machine?& v8 c7 E/ l3 W+ u, F
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4. What technical requirements should be fulfilled. like pressure, volumeflow, power supply 5 w' ]+ k+ A$ p' B" ?- f) Yit decides which machine class from the manufacturers & [* y. I. Q$ }, p1 b$ j! i! a( l4 ^5 [5 r$ `2 s) l* X
5. Where will the machine be used? $ m S& Q0 j- s5 Git decides unit number and construction special requirements. e.g. in hopital --> 3 parallel units. in train --> compact units. on ship --> units mounted directly on board. and so on+ a* D4 P# X. a4 b6 b! R7 v
( b9 K1 l* l+ S2 c6. What is the budget for the new machine?) w1 }& R7 |/ K! `
it decides domestic manufacturer and foreign company2 N( B6 q: N3 Y! c; n" n
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7. How close should the service sites be? ( c5 h$ B2 }% ^
it decides some manufacturers with less service possibilities will not be considered- ]' _( F/ X1 I4 e% ]' A" R: n
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Last but not least, customer should consider, whether he is looking for a stand-alone machine or a system. Many manufacturers offer solutions with complete systems.作者: 水上漫步 时间: 2011-5-29 17:37
哎,好多都是重的