FLOWS AND FLOW CHARACTERISTICS OF SPOOL VALVE
نویسندگان
چکیده
منابع مشابه
Noise Characteristics in Spool Valve with V-notches
Experimental investigations on the noise characteristics in spool valve with v-notches are conducted in this paper. Cavitation noise with frequency peak forms when the flow state changes form single phase turbulent to cavitating. The peak frequency decreases with the increase of the flowrate. On the other hand, jet flow develops intensely from the notches. Self-sustained flow oscillation produc...
متن کاملFlow-Force Analysis in a Hydraulic Sliding-Spool Valve
Original scientific paper The necessary forces for the control of a hydraulic sliding-spool valve are normally determined by the stationary axial momentum forces of the oil flow through a valve. These forces increase with an increase in the volume flow and the pressure difference. Because of the limited actuating-force potential of normal electromechanical actuators, the direct actuation of con...
متن کاملSimulation of the cavitating flow in a model oil hydraulic spool valve using different model approaches
The contribution compares results of Large Eddy Simulations of the cavitating flow in a model oil hydraulic spool valve using an Euler-Euler and a one-way coupled EulerLagrange model. The impact of the choice of the empirical constants in the Kunz cavitation model is demonstrated. Provided these are chosen appropriately the approach can yield reasonable agreement with the corresponding experime...
متن کاملPressure flow characteristics of the valve in spacer devices 1307 During expiration the flows
During expiration the flows required to close the Volumatic valve were slightly higher than those required to open the valve, but lie still in a range easily achievable by infants. The flows required to close the Nebuhaler valve were significantly higher than those required to close the Volumatic valve. In the vertical position the expiratory flows averaged 73.9 ml/second (range 69-8-81*5 ml/se...
متن کاملCrank-slider Spool Valve for Switch-mode Circuits
A key component of switch-mode hydraulic circuits is a highspeed two-position three-way valve with a variable duty cycle. This paper presents a new valve architecture that consists of two valve spools that are axially driven by crank-slider mechanisms. By phase shifting the two crank links, which are on a common crankshaft, the duty cycle of the valve is adjusted. The two spools split and re-co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the JFPS International Symposium on Fluid Power
سال: 1999
ISSN: 2185-6303
DOI: 10.5739/isfp.1999.51