Abstract:
A fluidic pressure regulator for maintaining a system pressure over a range of ambient pressures, which includes a pressure sensing circuit comprised of a bridge network of orifice and laminar flow restrictors providing an output error signal for all pressures except the unique null pressure at which the pressure drop across an orifice restriction and a laminar flow restriction are equal. A downstream orifice is provided which operates in the sonic regime to eliminate the effects of ambient pressure shifts on the null point, while the error signal is used with a flow controller to maintain the system pressure at this null point. In a second version, the effects of temperature on the null point are eliminated by means of a temperature controlled variation of the area of the downstream orifice.
Abstract:
A fluid flow device which will produce a tailored flow-rate to pressure difference relationship including a laminar and an orifice restriction connected to a radial and a tangential inlet respectively of a vortex valve, with both connected in parallel to the upstream pressure source. Flow across the assemblage will be such that the vortex valve will act like a smaller orifice at lower flows and a larger orifice at higher flows, or vice versa, due to the shifting of the respective shares of the total flow accommodated by the laminar and orifice restrictions. This arrangement is incorporated into a shock absorber to produce an improved output damping characteristic.
Abstract:
A ram type intensifier capable of producing a continuous flow of liquid at pressures on the order of 70,000 psi is disclosed, comprised of a pair of alternately and cyclically stroked ram cylinders, in which the flow of pressurized operating fluid to the ram chambers is from a constant pressure source controlled such that simultaneous pressurization of both ram chambers is provided at the end of each cycle so that precompression of the cylinder beginning its pressure stroke is carried out before depressurization of the cylinder ending its pressure stroke. This arrangement prevents pressure variations occurring as a result of the substantial compression of the liquid occurring at these pressure levels.
Abstract:
A pressure regulator for maintaining inlet pressure to a fluid device over a range of flow rates to or from the fluid device, using a vortex valve with vertical pressure flow characteristics, connected with the supply inlet in parallel with the fluid device inlet and with a constant control pressure applied. The supply and control flow rates for the given value of regulated pressure are designed so that the range of flow rates experienced because of fluid device inlet flow fluctuations falls in the vertical pressure flow range of the vortex valve. In a second version, the supply and control flow rates are selectively variable so that the pressure regulator may operate in different ranges of regulated pressure values while still operating in the vertical pressure flow range of the vortex valve. A third version provides for pressure regulation at the inlet of an active load element.
Abstract:
A vortex valve for use in a fluid oscillator circuit characterized by exhibiting a pronounced negative resistance characteristic in a portion of its operating range and by having a vortex chamber defined in part by a resiliently movable portion to provide a mechanical output in response to pressure variations in the chamber. This particular vortex valve is incorporated into a fluid oscillator arrangement to produce oscillatory pulses in the vortex chamber and responsive movements of the movable portion by adjusting the control and supply pressures and flows so as to be in the negative resistance range of the vortex valve while at the same time maintaining a constant supply flow.
Abstract:
A vortex valve with tangentially opposed control and supply ports with the relative port sizes varied to control the output characteristics and produce a high or tailored gain at a desired pressure value and/or to introduce a pronounced negative resistance in an operating range of the valve. The valve is also combined with a fluid operated pressure regulating circuit, in which it is used as a flow controller.
Abstract:
A confined jet fluid pressure amplifier having a receiver comprising a plurality of openings to provide increased gain and reduced noise levels.