liu.seSearch for publications in DiVA
Change search
Link to record
Permanent link

Direct link
BETA
Andersson, Bo
Publications (7 of 7) Show all publications
Eriksson, B., Andersson, B. & Palmberg, J.-O. (2008). The Dynamic Performance of a Pilot Stage in the Poppet Type Hydraulic Flow Amplifier. In: The 51st NCFP Technical Conference,2008 (pp. 659). Proceedings of the 51st NCFP Technical Conference: Omnipress
Open this publication in new window or tab >>The Dynamic Performance of a Pilot Stage in the Poppet Type Hydraulic Flow Amplifier
2008 (English)In: The 51st NCFP Technical Conference,2008, Proceedings of the 51st NCFP Technical Conference: Omnipress , 2008, p. 659-Conference paper, Published paper (Refereed)
Abstract [en]

This paper examines the dynamic properties of the pilot stage in a poppet type two-stage flow control valve of the -Valvistor- type. The particular valve studied is a screw-in Valvistor valve of NG16 size. There are several benefits to this valve type: it has a high closed loop bandwidth and the design allows big flow capacities. An attractive feature of this two-stage valve is that the pilot flow contributes to the total flow giving higher steady state flow efficiency. The dynamic characteristics of the main stage were discussed in an earlier paper. In this paper the aim is to study the influence of the pilot stage of the valve. The bandwidth of this type of valve is often unexpected low. Due to the high bandwidth of the Valvistor element the pilot dynamics is often dominating. In this paper it is shown by measurements the influence of different parts in the pilot valve that limits its bandwidth. Flow forces are used in this valve to compensate the pressure dependency in the flow. It is a common way of design in so called pressure compensated valves. It is discussed in the paper how this flow forces influences the dynamic properties of the pilot valve. The mentioned flow forces interact together with the mechanical spring in the pilot valve. Although the studied valve is just one of many variants of the Valvistor principle, we will investigate it closely due to the interest for this valve among other researchers. One important conclusion is that the inductance of the pilot solenoid is often limiting the bandwidth of the valve as a whole. 

Place, publisher, year, edition, pages
Proceedings of the 51st NCFP Technical Conference: Omnipress, 2008
Keywords
valvistor, poppet valve, dynamic model
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-42261 (URN)62134 (Local ID)62134 (Archive number)62134 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2015-08-31
Andersson, B. (2008). Valve arrangement. EP1895168A1.
Open this publication in new window or tab >>Valve arrangement
2008 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

Valve arrangement for controlling the flow of fluid through a conduit and comprising a valve body with a first and a second valve port which serve, alternately, as input and output, and a valve cone arranged in the valve body which connects in its open position the valve ports with each other, and is actuatd by a holding force wihch is greater than the force acting on the pressurized fluid side of the valve cone and dependent on the medium pressure in the input port.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-43967 (URN)75244 (Local ID)75244 (Archive number)75244 (OAI)
Patent
EP1895168A1 (2008-09-01)
Available from: 2009-10-10 Created: 2009-10-10
Eriksson, B., Andersson, B. & Palmberg, J.-O. (2007). The Dynamic Properties of a Poppet Type Hydraulic Flow Amplifier. In: J. Vilenius and K. T. Koskinen (Ed.), 10th Scandinavian International Conference on Fluid Power, SICFP´07. Paper presented at 10th Scandinavian International Conference on Fluid Power, SICFP´07, 21st–23rd May, Tampere, Finland (pp. 161-178). Tampere, Finland: Tampere University of Technology
Open this publication in new window or tab >>The Dynamic Properties of a Poppet Type Hydraulic Flow Amplifier
2007 (English)In: 10th Scandinavian International Conference on Fluid Power, SICFP´07 / [ed] J. Vilenius and K. T. Koskinen, Tampere, Finland: Tampere University of Technology , 2007, p. 161-178Conference paper, Published paper (Refereed)
Abstract [en]

This paper examines the dynamic properties of a two-stage flow control valve of the "Valvistor" brand. There are several benefits to this: the valve ha a high closed loop bandwidth, the design allows big flow capacities etc. An attractive feature of this two-stage valve is that the pilot flow contributes to the total flow giving higher steady state flow efficiency. This paper presents an analythical model of this particular type of valve. A simplified model with relevant approximations is also presented. Measurements on the valve were made to validate the valve model. The paper also includes a further discussion about the pros and cons of the valve in open and closed loop applications.

Place, publisher, year, edition, pages
Tampere, Finland: Tampere University of Technology, 2007
Keywords
Fluid power, Valvistor, dynamic model
National Category
Information Systems
Identifiers
urn:nbn:se:liu:diva-12538 (URN)
Conference
10th Scandinavian International Conference on Fluid Power, SICFP´07, 21st–23rd May, Tampere, Finland
Available from: 2008-09-12 Created: 2008-09-12 Last updated: 2018-01-12
Andersson, B. (2007). Variabla pumpar i mobila system. In: Hydraulikdagar 07,2007. Linköping: Linköpings universitet
Open this publication in new window or tab >>Variabla pumpar i mobila system
2007 (Swedish)In: Hydraulikdagar 07,2007, Linköping: Linköpings universitet , 2007Conference paper, Published paper (Other academic)
Abstract [sv]

Det här föredraget behandlar olika systemprinciper för att styra en variabel pump i en mobil applikation. Variabla pumpar med elektrisk styrning ger möjlighet till nya intressanta systemprinciper.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2007
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-41265 (URN)55417 (Local ID)55417 (Archive number)55417 (OAI)
Available from: 2009-10-10 Created: 2009-10-10
Andersson, B. (2005). Hydraulisk riktningsventil. se SE 0302801-6.
Open this publication in new window or tab >>Hydraulisk riktningsventil
2005 (Swedish)Patent (Other (popular science, discussion, etc.))
Abstract [sv]

En hydraulisk riktningsventil av "öppet-centrum"-typ med ett ventilhus och en i detta rörlig vetilslid för reglering av flöde av hydraulfluid genom ventilen har en tryckkompenseringsventil anordnad i minst en för anslutning till en driven anordning avsedd arbetport för att tryckkompensera flödet från arbetsporten till den drivna anordningen.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-31393 (URN)17163 (Local ID)17163 (Archive number)17163 (OAI)
Patent
SE SE 0302801-6 (2005-11-01)
Note

Patenthavare: Nordhydraulik AB, uppfinnare: Bo Andersson, ombud Dr Ludwig Brann Patentbyrå AB

Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-10-18Bibliographically approved
Andersson, B. (2004). Open-center ventiler för framtidens mobila applikationer. Fluid Scandinavia : specialtidningen för hydraulik och pneumatik, 2(1)
Open this publication in new window or tab >>Open-center ventiler för framtidens mobila applikationer
2004 (Swedish)In: Fluid Scandinavia : specialtidningen för hydraulik och pneumatik, ISSN 1402-5590, Vol. 2, no 1Article in journal (Other academic) Published
Keywords
Open-center ventiler
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-23275 (URN)2700 (Local ID)2700 (Archive number)2700 (OAI)
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2011-01-12
Andersson, B. (2004). Over-centervenilers svängningsbenägenhet. In: Hydraulikdagarna 2003,2003. Linköping, Sweden: Linköpings universitet
Open this publication in new window or tab >>Over-centervenilers svängningsbenägenhet
2004 (Swedish)In: Hydraulikdagarna 2003,2003, Linköping, Sweden: Linköpings universitet , 2004Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Linköping, Sweden: Linköpings universitet, 2004
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-36392 (URN)31233 (Local ID)31233 (Archive number)31233 (OAI)
Available from: 2009-10-10 Created: 2009-10-10
Organisations

Search in DiVA

Show all publications