Title: Influence of oil temperature on pressure distribution and flow force of valve core

Authors: Conghua Hong; Shuyun Qiao; Aamer Abbas Shah

Addresses: School of Mechatronic Engineering, University of Mining and Technology, Xuzhou 221116, China ' School of Electrical and Control Engineering, Xuzhou University of Technology, Xuzhou 221018, China ' School of Electrical and Control Engineering, Xuzhou University of Technology, Xuzhou 221018, China

Abstract: Oil temperature is an important factor which affects the flow characteristics in the orifice and the liquid force acting on the valve core. Based on ANSYS Fluent 15.0, the two-dimensional axisymmetric flow model of the hydraulic valve is established, and the flow field characteristics under different oil temperatures are investigated. Considering the relationship between the viscosity and oil temperature, the change of flow velocity, pressure, flow rate and turbulent kinetic energy in the channel of the valve is discussed, and the influence of oil temperature on the steady-state fluid force of valve core is also obtained. A test rig is built and the steady-state fluid force acting on the core of the valve is also measured by a force sensor experimentally. The results show that oil viscosity decreases with the increase of the oil temperature, the flow rate and the maximum flow rate in the flow channel also increases, while the turbulent kinetic energy at the valve orifice decreases. With the increase of oil temperature, the axial force acting on the valve core decreases, so as the steady-state fluid force. Our research results could provide help for reducing the hydraulic force and improving the control precision of the valve.

Keywords: oil temperature; flow characteristics; steady-state flow force; oil viscosity; valve core.

DOI: 10.1504/IJHM.2023.134337

International Journal of Hydromechatronics, 2023 Vol.6 No.4, pp.342 - 358

Received: 21 Sep 2022
Accepted: 06 Jan 2023
Published online: 18 Oct 2023 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article