Abstract:
Elastic hose (1) of finite length which, in at least one segment (9) of its overall length, has a cross-sectional shape (11) which deviates from a circular cross section (10) up to a pressure considerably below the operating pressure. The sum of the partial segments (9) with the cross section (10) which deviates from the circular shape is less than the overall length of the molded hose (1) and the molded hose (1) has an approximately circular cross section (10) in the remaining partial lengths or segments (2, 5). The transitions (6, 7) from the cross section (11) which deviates from the circular shape to the circular cross section (10) run continuously in transition regions (6, 7). The transition regions (6, 7) are spaced apart from the connecting ends (2, 5) of the molded hose (1) in such a way that they lie outside the clamping zone of the connecting ends (2, 5) to connecting fittings (3). This permits a fast volume increase of the medium to be conducted even at low pressures without losses in fatigue strength, since the rigid clamping location (3, 4) has no influence on the cross section transitions (6, 7).
Abstract:
A system for reducing an acoustic load of a fluid flow includes a first pipe to carry the fluid flow; a standpipe connected to the first pipe at an opening in the first pipe; and a standpipe flow tripper provided in the standpipe. The flow tripper includes an edge extending through the opening into the flow on a downstream side of the opening. A method of reducing an acoustic load of a standing wave in a standpipe connected to a first pipe configured to carry a flow includes disrupting the flow in the first pipe at a downstream side of an opening in the first pipe to which the standpipe is connected.
Abstract:
The invention relates to a device for compensating for pressure drop in a product pipe through which a liquid flows and a system comprising such a device. The device comprises a collapsible tube portion, which is connectible to the product pipe and is characterized by a limiting means, which is adapted to counteract stretching of the tube portion in the circumferential direction and which is adapted to allow free collapsing of the tube portion.
Abstract:
A method of dampening fluid-borne noise in an automotive power steering system in accordance with a presently preferred embodiment of the invention contemplates provision of a power steering fluid hose having a laminated inner tube surrounded by a reinforcing outer tube. The inner tube has a resilient inner layer with a radial thickness T1 and a resilient outer layer with a radial thickness T2. The inner layer is softer than the outer layer and is bonded by vulcanization to the outer layer. The radial thicknesses T1 and T2 have a ratio selected to dampen fluid-borne noise within a preselected frequency range by elastic expansion of the inner and outer layers.
Abstract:
An energy attenuation apparatus in fluid communication with tubing adapted to convey a liquid under pressure, and including a liquid-conveying unit in fluid communication with the tubing and having a diameter greater than the tubing diameter. The liquid-conveying unit has four chambers in series, at least one of which contains a tube, wherein an annular space is formed between the inner peripheral surface of the unit and the outer peripheral surface of the tube. One end of the tube is connected to and in fluid communication with an inlet or outlet end of the chamber, and another, free end is spaced by an open gap from the outlet or inlet end of the chamber. The tube has at least one aperture in the free end and/or on the peripheral surface thereof for providing fluid communication between the tube and the chamber.
Abstract:
A fluid pressure system (S) includes a flexible diaphragm bladder (172) located inside a pressure tank (164) installed within a fluid system such as well (168). In preferred aspects, the bladder (172) can be inflated by the introduction of air and is located within a flexible confining tube (198) for preventing over expansion of the bladder (172) and in the preferred form being of a cylindrical configuration and arranged concentrically around the bladder (172). The bladder (172) and the confining tube (198) are free floating in and without physical connection with the pressure tank (164) in preferred forms. The pressure tank (164) includes a flexible side wall (196) to allow folding or willing of the assembled fluid pressure system (S) in preferred forms.
Abstract:
A hydraulic pulsation damper system for installation into an otherwise rigid hydraulic system to absorb and extinguish pressure pulsations being transmitted through the system by hydraulic fluid contained therein. The system is useful in suppressing pulsations in automotive fuel lines supplying fuel to fuel injection systems. The system includes fuel-conducting tubing made of flexible, non-permeable material that includes a convoluted central portion capable of expanding and contracting in response to pulsations in the fuel. Resilient foam is molded around the convoluted portion for controlling expansion of the convolutions. The foam and convoluted tubing are contained within a housing made from a larger-diameter hose having ends sealed as by swaged connectors. The damper system may be bent to accommodate installation with a fuel line in an engine and can conveniently provide a sound-deadening link in the fuel line of a vehicle between a body-mounted portion and an engine-mounted portion thereof.
Abstract:
Disclosed is a damping device to be incorporated into fluid systems, particularly hydraulic systems, said damping device comprising an expansion hose (2). An essentially rigid damper pipe (15) which is oriented counter to the direction of flow is disposed inside the inner space of said expansion hose (2). The damper pipe (15) is provided with a completely closed wall, resulting in a good damping effect. Preferably, the damper pipe (15) is significantly less flexible in the radial direction than the outer expansion pipe, whereby the damping effect is substantially enhanced.
Abstract:
Perforated pulsation dampening devices of this invention comprise a housing having a structural wall section with opposed ends defining an internal chamber. The housing is characterized by a plurality of openings disposed therethrough. A compressible member is disposed within the internal chamber and positioned to be contacted by fluid passed from an outside surface of the housing through at least one of the openings. The compressible member is configured to absorb a known fluid flow variation or pressure pulsation in the fluid contacting the compressible member to attenuate the same. If desired, a sleeve can be interposed between an inside surface of the internal chamber and an outside surface of the compressible member.
Abstract:
A composite interference pulsation dampener that has no moving parts, which results in the high reliability and efficiency of the dampener on wide intervals of frequencies, temperatures, pressures, and flow velocities. The device consists of modified interference disks separated by spacers, a hood, and covers. A modified interference disk is a hard disk with a central channel, secondary channels, and orifices/holes. The configuration of the device is optimized to reach a desirable performance in a given hydraulic/pneumatic system and to minimize the sizes, weight, and cost of the device.