Compressor surge control with airflow measurement

Details Compressor surge control with airflow measurement Compressor surge control with airflow measurement

1977-09-14

1979-08-07

Gruber, Felix D.

Boots, shoes, and leggings

60 3929, 415 17, 415 39, F04D 2702, F02C 914

Patent

active

041640330

ABSTRACT:
Surge control systems are provided for compressors which supply air to a pneumatic load. A signal proportional to the pressure ratio of the outlet pressure to the inlet pressure plus a selected reference pressure is compared to a measured weight flow rate of air through the compressor to provide a vent valve command signal. If the measured pressure ratio plus the reference pressure ratio exceeds the measured flow rate, a surge condition may ensue. The vent valve position command signal causes a venting valve to vent a portion of the air provided to the load, which reduces the measured pressure ratio and increases weight flow rate. During normal operation of the compressor, the vent valve command signal is zero for all values of weight flow rate. A transient control channel is provided which is responsive to the rate of change of the measured pressure ratio and/or measured weight flow rate.

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patent: 3292846 (1966-12-01), Harper et al.
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patent: 3868625 (1975-02-01), Speigner et al.
patent: 3935558 (1976-01-01), Miller et al.
patent: 4060980 (1977-12-01), Elsaesser et al.
patent: 4077203 (1978-03-01), Burnell

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