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Design and design investigations of a flow control spool valve

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Abstract

Flow and pressure, controlled by spool valve is indeed a very relevant and efficient option in the field of fluid power system. The demand of spool valve is increasing day by day for a high precision electrohydraulic control circuit. In the present study, a spool valve has been developed based on some standard assumptions. This valve is used in a variable displacement axial piston pump as a part of a pressure compensator component and its design is based on the static force balance. Analyzing the mathematical model, the outfit of the valve (i.e. spool diameter, sleeve diameter, size of the spring, etc.) has been designated to meet the dynamic performance at a high-pressure application. Stress, strain and deformation of the spool valve have been analyzed through the Finite Element Approach. One end of this spool valve is connected to the delivery line of the pump and the other end is connected to the reservoir, for which the valve experiences a huge differential pressure. Hence, high stress, strain and deformation might develop on the spool valve which leads to the failure of the valve resulting in the failure of whole hydraulic circuit. Based on the stress concentration and deformation, the appropriate material for the spool valve has been selected. The design optimization is also studied by altering the geometry of the spool rod.

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Abbreviations

A d :

Area develop by the spool land on port cut at supply side

A r :

Area develop by the spool land on port cut at return side

C d :

Discharge coefficient

C v :

Velocity coefficient

d s :

Spool land diameter

d :

Diameter of the spring wire

D:

Outer diameter of the spring

d or :

Orifice diameter at return chamber of spool valve

d sr :

Spool land diameter at reservoir side

k s :

Stiffness of the spring

l d :

Distance between supply port to spool land

l r :

Distance between return port to spool land

l sr :

Length of the return chamber of the spool valve

m s :

Mass of the spool

o d :

Spool overlap at supply side

P d :

Pump supply pressure

P l :

Pressure at spool chamber at return side

P r :

Reservoir pressure

P sc :

Pressure at actuator line

Q sc :

Flow through meter port supply side to actuator side

Q lu :

Flow through actuator side to return side

Q or :

Flow through the return side orifice

r p :

Radius of the circular port cut

u d :

Spool underlap at return side

x sv :

Spool displacement

δs0 :

Initial pre-compression of the spring

ρ:

Density of the working fluid

β:

Bulk modulus of the working fluid

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Acknowledgements

The authors acknowledge the support provided by the members of Mechanical System and Control Laboratory, Jadavpur University, India. The author(s) received no financial support for the research, authorship and/or publication of this article.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Connecticut, Storrs, CT, 06269, USA

    Abeetath Ghosh

  2. Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology , Shibpur, West Bengal, 711103, India

    Abhisek Gupta

  3. Department of Mechanical Engineering, Ghani Khan Choudhury Institute of Engineering and Technology, Narayanpur, Malda, 732141, India

    Nitesh Mondal

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  1. Abeetath Ghosh
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Ghosh, A., Gupta, A. & Mondal, N. Design and design investigations of a flow control spool valve. Int J Interact Des Manuf 17, 115–124 (2023). https://doi.org/10.1007/s12008-022-01135-1

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