Measuring device for vibrations at roots and screw compressors

摘要

Device for measuring the housing vibrations of screw compressors and roots with an acceleration sensor (3), which, with an evaluation unit (10) which in turn is connected through a high-pass filter (hp11) of 10 hz and a subsequent low-pass filter (tp11) of 1 khz in a first through the filter (hp11, tp11) limited frequency band signals (2b), wherein a subsequent integrator (4) the incoming signals (2b) into signals (2c) for converting the oscillation velocity and this value is a subsequent rms - complexing agents (7) to an effective mean value (2d), which a transducer (8) as a signal (2e) in milliamperes, for example, between 4 and 20 ma, to a device for display - and limit monitoring device, which outputs functions of filters (hp11, tp11), an integrator (4), rms - complexing agents (7) and the transducer (8) and their links, in a programmable microprocessor can be implemented, characterized by the,that in the same housing (1) as further elements for a parallel evaluation of this acceleration measurement signal (2) a high pass filter (hp21) of 10 hz, and optionally..