A1 Journal article (refereed), original research

Lateral Force Acting on the Sliding Spool of Control Valve Due to Radial Flow Force and Static Pressure

Open Access publication

Publication Details

Authors: Lu Qianqian, Tiainen Jonna, Kiani-Oshtorjani Mehran, Wu Yangfang

Publisher: Institute of Electrical and Electronics Engineers (IEEE): OAJ / IEEE

Publication year: 2021

Language: English

Related journal or series: IEEE Access

Volume number: 9

Start page: 126658

End page: 126669

Number of pages: 12

eISSN: 2169-3536

JUFO level of this publication: 2

Digital Object Identifier (DOI): http://dx.doi.org/10.1109/ACCESS.2021.3112188

Open Access: Open Access publication

Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2021092146690


The hydraulic sliding-spool valve is a key component to control the flow
rates and thus pressures in different hydraulic volumes. The lateral
force on the spool is one of the important effects resulting from moving
resistance. This paper presents research aimed at understanding the
effects of radial flow force and static pressure upon the lateral force.
The radial flow force is calculated from three types of control
surfaces labelled with square land, 45° conical, and round curved
surfaces, for discovering the effects of control profile, combined with
inlet and outlet control conditions. The pressure difference effect is
analyzed along with six cases under the same orifice opening, and the
radial flow force is found to vary linearly with the pressure
difference. The results also indicate that the radial force for the
inlet control mode is less than that of the outlet control mode. The jet
angle is discovered to not only be related to the annular orifice
opening and gap clearance, but is also influenced by the flow direction
and control surface profile. The static pressure is the predominant
factor in the lateral force compared to the radial flow force. The
results indicate that the static pressure variation on the surface of
the cylindrical spool shoulder increased linearly with the inlet
pressure; and two stagnation points can be observed in the case of the
valve cavity with oil passages on the same section, and square land
control edge profile. The lateral force on the spool increases with the
pressure, and could reach to the maximum of 300 N, implying that this
force should be taken into account in the selection of an actuator,
especially in high pressure applications.

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Last updated on 2021-21-10 at 12:16