Results 221 to 230 of about 63,150 (264)

Novel, Compact Devices for Reducing Fluid-Borne Noise

SAE Technical Paper Series, 2011
<div class="section abstract"><div class="htmlview paragraph">Hydraulic systems pose a particular problem for noise control. Due to the high speed of sound in hydraulic fluids, components typically designed to reduce fluid-borne noise can easily exceed practical size constraints.
Nicholas Earnhart, Kenneth Marek, Kenneth Cunefare   +2 more
openaire   +1 more source

Rating of Pump Fluid-Borne Noise

Fluid Power Systems and Technology: Collected Papers, 1994
Abstract It is desirable to have a rating that can indicate the potential of a pump for causing noise in any hydraulic equipment as a result of pressure and flow fluctuations. The rating should preferably be a single quantity. A number of contenders are examined and found to have disadvantages and it is suggested that a new rating ...
D. Nigel Johnston, Derek K. Longmore
openaire   +1 more source

Transmission of Fluid Borne Noise in the Reservoir

BATH/ASME 2018 Symposium on Fluid Power and Motion Control, 2018
The paper presents results of research on the transmission of fluid borne noise in reservoir filled with fluid. This type of transmission of vibrational energy in the fluid occurs in fluid power units, in which hydraulic pumps are immersed in the liquid in the tank i.e. in the vertical mounting of the electric motor on the reservoir.
W. Fiebig, J. Wrobel, P. Cependa
openaire   +1 more source

Compliant-wall methods for fluid-borne noise reduction

The Journal of the Acoustical Society of America, 2011
One means of addressing fluid-borne noise in hydraulic systems is to add a compliant-walled section to the flow path. The impedance mismatch at the section boundary reflects a substantial amount of acoustic energy back to the source, and additional damping may be present due to the compliant material. While hoses can be used to add this compliance, the
Kenneth A. Marek, Nicholas E. Earnhart, Kenneth A. Cunefare   +2 more
openaire   +1 more source

Active control method for fluid borne noise in aerospace fluid systems of variable operation statuses

Mechanical Systems and Signal Processing
Chujun Wu, Zongxia Jiao, Yuanzhi Xu, Chijun Li, Qingxu Liu, Shaodong Wu   +5 more
openaire   +3 more sources

Novel Integrated Control of Fluid-Borne Noise in Hydraulic Systems

BATH/ASME 2018 Symposium on Fluid Power and Motion Control, 2018
The noise in hydraulic machines presents itself as fluid-borne noise (FBN), structure-borne noise (SBN) and air-borne noise (ABN). FBN is caused by the unsteady flow produced by pumps and motors or the operation of digital hydraulics, and propagates through the system causing SBN, which in turn causes ABN. This article reports on a novel integrated FBN
Min Pan, Beichen Ding, Chenggang Yuan, Jun Zou, Huayong Yang   +4 more
openaire   +1 more source

Fluid-borne noise-supressor for hydraulic pump

The Journal of the Acoustical Society of America, 1980
A noise-suppressor for fluid-borne noises in a hydraulic system comprises a cylindrical shaped housing consisting of a pair of cup-shaped end caps and a tubular center section connected therebetween such that the joint between the section and end caps is spaced from the end of the housing.
openaire   +1 more source

Investigation of Fluid Borne Noise in the Hydraulic Power Steering Vane Pump through Computational Fluid Dynamics (CFD)

SAE Technical Paper Series, 2022
<div class="section abstract"><div class="htmlview paragraph">The present article related to the investigation of fluid bore noise in the power steering pump which is the major source of noise generation in hydraulic power steering system due to the flow ripple and pressure pulsation.
Pugazhenthi Palanisamy, Ashok Ethirajan, Kirubanandan Sethupathi, Prabhu Shankar Veerasamy   +3 more
openaire   +1 more source

A Test Method for Measurement of Pump Fluid-Borne Noise Characteristics

SAE Technical Paper Series, 1991
<div class="htmlview paragraph">A novel method for evaluating the source flow ripple and source impedance of positive displacement hydraulic pumps is described. The method is based on the measurement and frequency domain analysis of pressure standing waves in a pipe, and uses a secondary source of pressure ripple for excitation of the pump under ...
D.N. Johnston, K.A. Edge
openaire   +1 more source

Fluid-Borne and Structure-Borne Noise from Valves and Orifices with Water Flow

The Journal of the Acoustical Society of America, 1974
Water flow through valves and orifice plates in a piping system is a source of high noise levels when cavitation occurs and, since the noise is propagated easily by the structure and fluid of the system, severe acoustic problems can arise. Laboratory measurements have been made to determine the fluid-borne and structure-borne noise characteristics of a
J. F. Wilby, P. E. Rentz
openaire   +1 more source