Flow control valve with the polymer envelope as control organ

V P Purdyk,O L Brytskiy

doi:10.20535/2521-1943.2018.82.126859

Abstract

The existing hydraulic devices, with design based on the usage of “spool-and-sleevecylinder”, have disadvantages such as low speed reaction and reliability, due to high sensitivity to the pollution in working fluid and non-workability of the construction. The aim of the research is to substantiate, on the base of mathematical modeling and experimental studies the application in the construction of fluid control valve the control organ, made of the polymer material in the form of the envelope. The influence of geometric shell parameters on the quality of the control process is investigated. The conditions and directions of the most effective use of the regulator are established. The results obtained are engineering basis for the creation of the efficient construction of fluid control valve with polymer control organ of the envelope form with the enhanced technical characteristics.

Highlights

Hydraulic equipment, intended to control and distribute the working fluid in hydraulic drives, are used in the drives, is conventionally based on the application of mainly spool-type devices [1,2]
The analysis of the static characteristics showed that the accuracy of flow stabilization across the fluid control valve with the polymer control organ is 10% lower as compared with the serial analog G55-2
The analysis of the transient processes, obtained as a result of simulation mathematical modeling shows that the fluid control valve has the increased speed and stability characteristic

Summary

Introduction

Hydraulic equipment, intended to control and distribute the working fluid in hydraulic drives, are used in the drives, is conventionally based on the application of mainly spool-type devices [1,2]. To provide the uniformity of the control organ of the hydraulic technological machine operation it is necessary to maintain the consumption value Q3 constant This can be performed by means of changeable throttle 7 that maintains constant pressure differential as a result of the change of the passage area of the working window cross-section due to the deformation of the control element (Fig.). The analysis of the transient processes, obtained as a result of simulation mathematical modeling (see example in Fig 5) shows that the fluid control valve has the increased speed and stability characteristic (transient process has smooth aperiodic character and lasts not more than 0,01s.The form of the transient process shows that the component of the second order (response rate of the envelope) in the balance of forces equation, acting on the envelope, practically does not influence its character, that is why in the engineering calculation this component is not taken into account. As a result of the experimental research carried out, the obtained oscillograms of the transient processes (see the sample in Fig 8) proved basic operation characteristics of the fluid control valve with the polymer control organ that were declared as a result of mathematical simulation modeling, namely, fast operation speed and the quality of the transient processes al satisfactory static characteristics

Conclusions

Регулятор витрати з полімерним керуючим органом оболонкової форми

Findings

Регулятор расхода с полимерным управляющим органом оболочковой формы