Dynamic Characteristics of The Spool-Type Constant-Flow Valves

Abstract

Constant flow valves have been presented in industrial applications or academic studies, which compensate recess pressures of a hydrostatic bearing to resist load fluctuating. The flow rate of a constant-flow valve can be constant in spite of the pressure changing in a recess. However the design parameters of this type valve must be specified. This paper analyzes the dynamic responses of the spool-type constant-flow valve that is designed as a spool-type restrictor but with matched preloading spring and supply pressure. In this study the static analysis presents the specific relationships among design parameters for constant flow rate and the dynamic analyses give the variations around the constant flow rate as the working pressure fluctuates.

Keywords

• constant-flow valve (cfv)
• hydrostatic bearing
• spool-spring system
• dynamic characteristics