概述
Above roughly 300 kW of continuous duty, a centrifugal machine is usually the most efficient option. It accelerates air with a high-speed impeller instead of trapping it between rotors, and it delivers oil-free air by design because there is no oil in the compression path.
These are engineered machines, selected around your specific flow, pressure, cooling water and ambient conditions rather than picked from a list.
主要优势
Very high flow
Single machines covering flows well beyond the practical limit of screw compressors.
Oil-free by design
No lubricant in the air path at all, Class 0 without filtration.
Low maintenance
Few wearing parts in the gas path. Long intervals between major overhauls.
Engineered selection
Performance curve matched to your duty point, including summer and winter conditions.
机器是怎么造的
高速旋转的叶轮让气体加速，扩压器再把速度变成压力。气路中没有接触，也没有油，所以不靠过滤，空气本身就是洁净的。
这是连续运行的机器。它适合大而平稳的用气需求；如果负荷来回大幅波动，它就不是正确答案——这是买它之前最需要知道的一件事。
多级压缩加级间中冷，是高效达到目标压力的办法。中间冷却器和叶轮一样，都是这台机器不可分割的一部分。
- 气路按设计即无油
- 多级压缩带级间中冷
- 为大而连续的用气需求而造
- 不适合大幅波动的负荷
- 在设计点效率极高
- 大修间隔很长
- 标配水冷
- 性能按 ISO 1217 认证
控制器做的事
调节气量优先靠进口导叶，放空只作为最后手段，因为放空就是把压缩好的空气扔掉。
在这种机型上，喘振保护不是可选项。控制系统在每一个运行点上都让机器远离喘振线，而不是把这件事交给操作人员。
流量、压力、功率和比气耗都会显示，而比气耗才是那个能说明"这台机器是否还值它当初价钱"的数字。
- 进口导叶调节
- 放空只作为最后手段
- 每一个运行点都有喘振保护
- 屏幕显示比气耗
- 与其他机器联控
- 振动持续监测
- 标配远程监控
- 完整的趋势记录与故障历史
配件与服务
轴承、密封件和齿轮箱按公布周期保养，每次到场都记录振动和性能。
离心机会通过振动和效率给出大量预警，但这两样只有在有人记录时才有用。
大修是计划出来的，不是被动应付的。在这个尺寸的机器上，一次计划外停机的代价远高于一次大修。
- 按周期进行的轴承与密封件保养
- 齿轮箱检查列入保养计划
- 每次到场都记录振动
- 比气耗与调试时的数值持续对比
- 大修有计划，不是被动应付
- 调试时一并确定现场备件清单
- 含冷却器清洗
- 服务方案下固定价格
常见问题
How does a centrifugal compressor work?
An impeller accelerates the gas and a diffuser converts that velocity into pressure. It is dynamic compression, not positive displacement.
When is it the right machine?
At high flow, usually above 100 m³/min. Below that a screw machine is normally more efficient and much simpler to operate.
Is the air oil-free?
Yes, in the compression path. There is no lubricant in the gas stream, which is why these machines suit large food, pharmaceutical and electronics plants.
What is surge?
Flow reversal when demand drops too far. It is noisy, damaging and must be prevented by control: never treated as an operating condition.
How is capacity controlled?
Inlet guide vanes, and blow-off as a last resort. Guide vanes are efficient over a wide range. Blow-off is compressed air thrown away.
How long does the machine last?
Decades. There is no rubbing contact in the gas path, so with clean gas and good bearings these are extremely long-lived machines.
What maintenance does it need?
Bearing and gearbox oil, condition monitoring, and periodic inspection. Vibration analysis matters far more on these than on a screw compressor.
Is the efficiency better?
At full load and high flow, yes. Efficiency falls faster off design point, so the sizing has to match the real duty rather than a hoped-for future one.
What about heat recovery?
Excellent, large, concentrated heat at a useful temperature. On a big plant this is often the largest single recovery opportunity available.
What does installation involve?
A designed foundation, cooling water or air, and a proper control interface. These are project installations, not a delivery and a plug.
相关产品
不确定该选哪个型号？
把您的用气量、工作压力和运行小时数发给我们。我们的工程师会完成选型并给出书面建议，不收费，也不构成任何义务。