Design and Analysis of Base Valve of Twin Tube Dampers

Bhuyan, Dheeman; Kumar, Kaushik

doi:10.4028/www.scientific.net/amm.852.504

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The use of an explicit/weak coupling scheme or unidirectional coupling is described in the context of valve research in works such as [14], [19]. The authors obtained results of the flow characteristics of the tested valve but under the assumption that the flow path adopted in the CFD model corresponds to the estimated shape of the structure under load.…”

Section: Numerical Modelmentioning

confidence: 99%

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Experimental and Numerical Studies on the Development of Hysteresis in a Shock Absorber with a Shim Disc Valve

Buczkowski

Żymełka

Nowak

2022

Int. J. Automot. Mech. Eng.

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The paper describes the observed occurrence of hysteresis of the characteristic curve of a shock absorber valve. The phenomenon has an impact on the asymmetry of the damping force characteristic and should be taken into account when modelling the valve operation. The aim of the investigations was to determine the factors generating the phenomenon and establish the relationships between these factors and the hysteresis size. Tests were carried out on a stand intended for valve measurements in isolated conditions. A strongly coupled Fluid-Structure Interaction numerical model was also created to simulate the valve operation in selected conditions. The results indicate that the hysteresis loop occurrence is mainly due to the conditions of the valve disc stack preload in the process of its composition and, consequently, to the friction between the valve elements. Having an impact on the contact between discs and on the disc stack overall structure, they affect the hysteresis field significantly. The testing results confirm the supposition that hysteresis is not due to the phenomena related to the conditions of the flow through the valve.

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Section: Numerical Modelmentioning

confidence: 99%

“…Such a gap pre-filled with oil makes it possible to solve the difficult aspect of closed contact between surfaces filled with oil after opening. A similar approach was successfully used by the authors of [19] for the same purpose. It was assumed that the size of the gap was too small to have a significant effect on the flow characteristics.…”

Section: 𝜌𝜌mentioning

confidence: 99%

Experimental and Numerical Studies on the Development of Hysteresis in a Shock Absorber with a Shim Disc Valve

Buczkowski

Żymełka

Nowak

2022

Int. J. Automot. Mech. Eng.

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Modeling and simulation of twin-tube hydraulic shock absorber thermodynamic characteristics and sensitivity analysis of its influencing factors

Zhao

Zhou

et al. 2020

Int. J. Model. Simul. Sci. Comput.

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In order to find out the sensitivity of the thermophysical and structural parameters to the thermodynamic characteristics of twin-tube hydraulic shock absorbers, based on the bench test, a method for calculating the time-varying rate of the external work on the shock absorber oil is proposed. And then, a thermodynamic model of the twin-tube hydraulic shock absorber is established by using the basic thermodynamic principles. By analyzing the influence of each parameter on the thermodynamic characteristics of the shock absorber, it can be seen that, the radius of the working cylinder outer wall has the greatest influence on the temperature rise of the shock absorber, followed by the thermal conductivity of the oil, the height of the oil, the heat transfer length of the cylinder barrel, the radius of the oil storage cylinder outer wall, the emissivity of the oil storage cylinder outer wall, the height of the nitrogen, the thermal conductivity of the nitrogen, the specific heat capacity of the oil, the density of the oil, the thermal conductivity of the cylinder, and the mass of the working oil. The kinematic viscosity of the oil has the least influence on the temperature rise of the shock absorber. The research can provide an effective theoretical guidance and reference for the design of the twin-tube hydraulic shock absorber.

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Design and Analysis of Base Valve of Twin Tube Dampers

Cited by 2 publications

References 3 publications

Experimental and Numerical Studies on the Development of Hysteresis in a Shock Absorber with a Shim Disc Valve

Experimental and Numerical Studies on the Development of Hysteresis in a Shock Absorber with a Shim Disc Valve

Modeling and simulation of twin-tube hydraulic shock absorber thermodynamic characteristics and sensitivity analysis of its influencing factors

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