Evaluating the Influence of Leaking Active Check Valves in Digital Displacement<sup>®</sup> Units

Bender, Niels Christian; Pedersen, Henrik C.; Winkler, Bernd; Plöckinger, Andreas

doi:10.1109/gfps.2018.8472399

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The objective is to deliver the required mechanical work to switch the valve with the lowest power consumption and response time. Simplified, the require power may be approximated, by only considering the resisting fluid forces and moving mass, as [26]:…”

Section: Lumped Parameter Model Backgroundmentioning

confidence: 99%

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Pedersen

Bender²,

Andersen

2023

TJFP

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Designing Fast Switching Valves (FSVs) for digital displacement units is a complicated process pushing the technology to the limit. The system dynamics and the interaction of the fluid, mechanical structure, actuator and control hence calls for advanced modelling, including CFD and FEA, to capture, e.g. fluid stiction effects, end-damping and impact contact stresses. Unfortunately, this essentially renders optimization processes infeasible due to the computational burden involved, although this is precisely what is required for this type of complex multi-domain problem. Therefore, the focus of the current article is on how a complex mechatronic design problem, like designing an FSV, may be aided by considering decomposing and simplification through sensitivity analysis and analyzing correlations between the design and output parameters. This is done to significantly reduce the original design problem without compromising the investigated design space. The paper focuses specifically on the results related to an FSV and the flow delivering part of this, showing the influence of the various design parameters. However, the approach and considerations may be generalized to an other areas as well.

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Section: Lumped Parameter Model Backgroundmentioning

confidence: 99%

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Pedersen

Bender²,

Andersen

2023

TJFP

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“…At Purdue University, there has been much work on different control strategies [14,40,55]. At Aalborg University, the focus has been on valve design for large Digital Displacement ® machines for wind turbines [9,58,73], as well as on control [63] and tribological design aspects [42]. Some work has also been done at the University of Minnesota, where concepts with rotary valves have been proposed [82].…”

Section: Individual Element Controlmentioning

confidence: 99%

Classification and Review of Variable Displacement Fluid Power Pumps and Motors

Kärnell

Ericson

2023

TJFP

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Displacement control of positive displacement machines has been a part of fluid power since the early days. Some of the early hydraulic presses already used two different displacement settings, though this was realised by using two different pumps rather than changing the displacement. Later, radial motors with variable stroke length appeared, followed by other designs of variable machines, such as swashplate machines, bent-axis machines, and variable vane machines. All these solutions control the displacement by varying the volume difference of the displacement element – but there are other ways of achieving this. Most have not passed the research state, but some are commercially available. In this paper, different ways of varying the displacement are presented and classified. The classification divides concepts into either control of displaced fluid or control of usage of displaced fluid. In turn, these concepts can be either on system level or displacement element level. This results in four main classes, which to some extent can describe the characteristics of the control.

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Evaluating the Influence of Leaking Active Check Valves in Digital Displacement^® Units

Cited by 2 publications

References 11 publications

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Classification and Review of Variable Displacement Fluid Power Pumps and Motors

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Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units

Cited by 2 publications

References 11 publications

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Classification and Review of Variable Displacement Fluid Power Pumps and Motors

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Product

Resources

About

Evaluating the Influence of Leaking Active Check Valves in Digital Displacement^® Units