Study on the Influence of Triangular Groove Structure on Steady-State Flow Force Compensation Characteristics

Li, Ruichuan; Ding, Xinkai; Lin, Jianghai; Chi, Feng; Xu, Jikang; Cheng, Yi; Liu, Jilu; Liu, Qi

doi:10.3390/app112311354

Cited by 4 publications

(2 citation statements)

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“…Ref. [31] shows research on the effect of the shape of the spool cavity and control surface on the flow force values. They proved that the conical shape of the cavity surface and the triangular shape of the control surface can reduce the flow force values.…”

Section: Cfd Simulations Of Steady-state Flow Forcesmentioning

confidence: 99%

A Review of the CFD Method in the Modeling of Flow Forces

Domagala,

Fabis-Domagala

2023

Energies

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Hydraulic valves are key components of fluid power systems. They control the flow rate and pressure in hydraulic lines, actuator motion, and direction. Valves that control flow rate or pressure can be divided into two main categories: spool-type valves, where control components are similar to the piston inside a sleeve with control orifices; and seat-type valves, in which a poppet inside a seat opens and closes the flow. Forces induced on valve components during oil flow are crucial to the valve’s operational capabilities. They can be calculated using a formula originating from the momentum conservation equation for a two-dimensional control volume. Increasing demands for flow rate and pressure control accuracy cause flow forces to be calculated much more accurately than when using the analytical formula. Therefore, computational fluid dynamics (CFD) simulations are the only effective tool for their calculation. This paper reviews the CFD approaches used for calculating flow forces inside hydraulic valves. It presents typical approaches used for evaluating flow forces inside hydraulic valves. The oldest and most common are conducted for a fixed position of valve components for defined flow conditions, which do not cover all components of flow forces. The dynamic flow forces can be calculated using more complex CFD models using fluid–structure interaction (FSI) techniques. This paper presents available FSI techniques for the simulation of transient flow forces, mainly for valves whose component position is determined by the forces occurring during oil flow.

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Section: Cfd Simulations Of Steady-state Flow Forcesmentioning

confidence: 99%

A Review of the CFD Method in the Modeling of Flow Forces

Domagala,

Fabis-Domagala

2023

Energies

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“…Therefore, in this study, an electrohydraulic proportional control valve was selected as the research object, and an advanced international reversing valve was selected as the reference object [27][28][29][30][31]. A mathematical model of the pressure compensation system was established using the power bond diagram method.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of the Static and Dynamic Behavior of the Hydraulic Compensation System of a Multichannel Valve

Xu¹,

Li²,

Cheng³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Electro-hydraulic proportional valve is the core control valve in many hydraulic systems used in agricultural and engineering machinery. To address the problem related to the large throttling losses and poor stability typically associated with these valves, here, the beneficial effects of a triangular groove structure on the related hydraulic response are studied. A mathematical model of the pressure compensation system based on the power-bond graph method is introduced, and the AMESim software is used to simulate its response. The results show that the triangular groove structure increases the jet angle and effectively compensates for the hydrodynamic force. The steady-state differential pressure at the valve port of the new pressure compensation structure was 0.65 MPa. Furthermore, experimental results show that the pressure difference at the main valve port is 0.73 MPa, and that the response time is less than 0.2 s. It is concluded that the new compensation structure has good pressure compensation response characteristics.

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