Design of Over Center Valves Based on Predictable Performance

M.R. Hansen; T.O. Andersen; P. Pedersen; Finn Conrad

Design of Over Center Valves Based on Predictable Performance

M.R. Hansen, T.O. Andersen, P. Pedersen, Finn Conrad

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

A typical oil hydraulic over center valve system and a time domain simulation model is introduced together with a hypothesis that flow force compensation should reduce the inherent oscillatory behavior of such hydraulic systems. A few results are shown from a parameter study that confirms this assumption and an approach to design over center valve geometries that have negative flow forces is presented with emphasis on predictability. In conclusion it is made clear that negative flow forces in the over center valve cannot solve the instability problem in general, however, it might very well be a method like lowering the pilot ratio, that can be used to application specific instability problems.

Original language	English
Title of host publication	Proceedings of ASME Intl Mechanical Engineering Congress IMECE´04 : Fluid Power Systems and Technolgy
Volume	2
Place of Publication	New York, USA
Publisher	American Society of Mechanical Engineers
Publication date	2004
Pages	1-7
ISBN (Print)	0-7918-4179-0
Publication status	Published - 2004
Event	ASME International Mechanical Engineering Congress IMECE´04 - Anaheim, CA, United States Duration: 14 Nov 2004 → 19 Nov 2004 http://www.asmedl.org/browse/asme/volume.jsp?KEY=ASMECP&type=c2v&code=IMECE2004&id=79086&series=IMECE2004&type=c2v

Conference

Conference	ASME International Mechanical Engineering Congress IMECE´04
Country	United States
City	Anaheim, CA
Period	14/11/2004 → 19/11/2004
Internet address	http://www.asmedl.org/browse/asme/volume.jsp?KEY=ASMECP&type=c2v&code=IMECE2004&id=79086&series=IMECE2004&type=c2v

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title = "Design of Over Center Valves Based on Predictable Performance",

abstract = "A typical oil hydraulic over center valve system and a time domain simulation model is introduced together with a hypothesis that flow force compensation should reduce the inherent oscillatory behavior of such hydraulic systems. A few results are shown from a parameter study that confirms this assumption and an approach to design over center valve geometries that have negative flow forces is presented with emphasis on predictability. In conclusion it is made clear that negative flow forces in the over center valve cannot solve the instability problem in general, however, it might very well be a method like lowering the pilot ratio, that can be used to application specific instability problems.",

author = "M.R. Hansen and T.O. Andersen and P. Pedersen and Finn Conrad",

year = "2004",

language = "English",

isbn = "0-7918-4179-0",

volume = "2",

pages = "1--7",

booktitle = "Proceedings of ASME Intl Mechanical Engineering Congress IMECE´04",

publisher = "American Society of Mechanical Engineers",

address = "United States",

note = "ASME International Mechanical Engineering Congress IMECE´04, IMECE´04 ; Conference date: 14-11-2004 Through 19-11-2004",

url = "http://www.asmedl.org/browse/asme/volume.jsp?KEY=ASMECP&type=c2v&code=IMECE2004&id=79086&series=IMECE2004&type=c2v",

}

Hansen, MR, Andersen, TO, Pedersen, P & Conrad, F 2004, Design of Over Center Valves Based on Predictable Performance. in Proceedings of ASME Intl Mechanical Engineering Congress IMECE´04: Fluid Power Systems and Technolgy. vol. 2, American Society of Mechanical Engineers, New York, USA, pp. 1-7, ASME International Mechanical Engineering Congress IMECE´04, Anaheim, CA, United States, 14/11/2004.

Design of Over Center Valves Based on Predictable Performance. / Hansen, M.R.; Andersen, T.O.; Pedersen, P.; Conrad, Finn.

Proceedings of ASME Intl Mechanical Engineering Congress IMECE´04: Fluid Power Systems and Technolgy. Vol. 2 New York, USA : American Society of Mechanical Engineers, 2004. p. 1-7.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Design of Over Center Valves Based on Predictable Performance

AU - Hansen, M.R.

AU - Andersen, T.O.

AU - Pedersen, P.

AU - Conrad, Finn

PY - 2004

Y1 - 2004

N2 - A typical oil hydraulic over center valve system and a time domain simulation model is introduced together with a hypothesis that flow force compensation should reduce the inherent oscillatory behavior of such hydraulic systems. A few results are shown from a parameter study that confirms this assumption and an approach to design over center valve geometries that have negative flow forces is presented with emphasis on predictability. In conclusion it is made clear that negative flow forces in the over center valve cannot solve the instability problem in general, however, it might very well be a method like lowering the pilot ratio, that can be used to application specific instability problems.

AB - A typical oil hydraulic over center valve system and a time domain simulation model is introduced together with a hypothesis that flow force compensation should reduce the inherent oscillatory behavior of such hydraulic systems. A few results are shown from a parameter study that confirms this assumption and an approach to design over center valve geometries that have negative flow forces is presented with emphasis on predictability. In conclusion it is made clear that negative flow forces in the over center valve cannot solve the instability problem in general, however, it might very well be a method like lowering the pilot ratio, that can be used to application specific instability problems.

M3 - Article in proceedings

SN - 0-7918-4179-0

VL - 2

SP - 1

EP - 7

BT - Proceedings of ASME Intl Mechanical Engineering Congress IMECE´04

PB - American Society of Mechanical Engineers

CY - New York, USA

T2 - ASME International Mechanical Engineering Congress IMECE´04

Y2 - 14 November 2004 through 19 November 2004

ER -