Abstract
In order to improve the attenuation frequency range of traditional static two-stage H-type hydraulic muffler, a two-stage follow-up hydraulic muffler driven by gear-screw is designed based on PLC. The Muffler can change its structure parameters according to the rotational speed of the hydraulic pump, and attenuate the two pulsation frequencies of the hydraulic pump. Considering the structural parameters and gear transmission of the muffler, the static and dynamic characteristics of the muffler are analyzed systematically, and the stability of the muffler is verified by the case simulation test. The results show that the two-stage follow-up hydraulic muffler based on PLC can attenuate the two pressure pulsation frequencies at the same time, and the operation is stable and the response speed is fast. The two-stage follow-up hydraulic muffler has practical significance and value to provides a way for engineering hydraulic system noise reduction.
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