发明名称 |
En pulsationsdämpare för ett utvidgat lågfrekvensområde |
摘要 |
<p>Apparatus for attenuating low frequency pressure variations in a stock suspension being fed to a paper machine. The apparatus includes a pressurized overflow chamber having an inlet which delivers a stock suspension therein and an outlet for discharging stock from the chamber. A first control means controls the pressure applied to the suspension in the overflow chamber. The chamber communicates with a sump which receives the overflow from the overflow chamber. A sensing means senses the stock pressure in the inlet conduit and a second sensing means senses the level of stock in the sump. A high pass filter receives a signal from the first sensing means and a low pass filter receives a signal from the second sensing means. A summing amplifier receives the output of the high and low pass filters. A control means receives the output of the summing amplifier and is connected to the overflow means to control operation of an overflow valve in response to the output of the summing amplifier.</p> |
申请公布号 |
FI81622(C) |
申请公布日期 |
1990.11.12 |
申请号 |
FI19810001927 |
申请日期 |
1981.06.18 |
申请人 |
BELOIT TECHNOLOGIES,,INC. |
发明人 |
BRENDEMUEHL,ROGER CHARLES |
分类号 |
D21F1/60;D21F1/00;D21F1/06;(IPC1-7):D21F1/06 |
主分类号 |
D21F1/60 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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