Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur definierten Längsverschiebung einer in einer Antriebswelle mitdrehenden Verstellvorrichtung entlang der Mittenachse der Arbeitswelle. Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zur definierten Längsverschiebung einer in einer Antriebswelle mitdrehenden Verstellvorrichtung entlang der Wellenmittenachse der Antriebswelle, insbesondere in Verbindung mit der Regelung von flüssigen oder gasförmigen Volumenströmen bei Pumpen oder Verdichtern zu entwickeln, welche die vorgenannten Nachteile des Standes der Technik beseitigt, dabei über den gesamten Drehzahl-, und Temperaturbereich eine aktive und zuverlässige Regelung der Längsverschiebung mit sehr geringer Antriebsleistung gewährleistet, die zudem selbst für Hochdrehzahlanwendungen geeignet ist und auch unter ungünstigsten thermischen Randbedingungen, wie z.B. in der Nähe eines Turboladers einsetzbar ist, dabei klein und kompakt aufgebaut ist, robust arbeitet und den vorhandenen Bauraum optimal ausnutzt, zudem gleichzeitig fertigungs- und montagetechnisch einfach und kostengünstig herstellbar ist, stets eine hohe Betriebssicherheit und Zuverlässigkeit gewährleistet und selbst für unterschiedliche Pumpenbaugrößen als Baueinheit geeignet, d.h. "standardisierbar" herstellbar ist, und dabei gleichzeitig einfach und kostengünstig in beliebige Regelkreisläufe eingebunden werden kann. Die erfindungsgemäße Lösung ist dadurch gekennzeichnet, dass am gegenüberliegenden Ende der Antriebswelle (1) eine Arbeitskammer (12) angeordnet ist, in die eine in der Antriebswelle (1) angeordnete Durchgangsbohrung (7) mündet, wobei an der Verstellvorrichtung (2) ein mit der Arbeitskammer (12) in Wirkverbindung tretender Arbeitskolben (13) derart angeordnet ist, dass bei Druckaufbau in der Arbeitskammer (12), mittels einer an der Antriebswelle (1) angeordneten, erfindungsgemäßen Radialkolbenpumpe die Verstellvorrichtung (2) entgegen der Federkraft einer Rückstellfeder (10) variabel verfahren wird.
Abstract:
A vaned diffuser is provided. The diffuser comprises a housing having a first and second flow wall defining a flow path for the exit flow from an impeller. Twisted vanes are mounted on a movable structure capable of travel inside a chamber adjacent the first flow wall. The twisted vanes extend through rotatable structures rotatably retained in the flow walls such that the twisted vanes are slidably disposed across the flow path. Lateral movement of the movable structure moves the twisted vanes through the exit flow thus varying the stagger angle of the vane depending on which section of the twisted vane is in the exit flow. The rotatable structures have twisted openings that match the vane cross section and twist so that the rotatable structures readily rotate as the twisted vanes are moved through them.
Abstract:
An artificial heart (10, 90, 130) with a centrifugal pump is disclosed. In one embodiment, the artificial heart includes an impeller (28, 40, 100, 132) disposed in a housing (12, 92). The impeller is configured to rotate to circulate blood through the housing. The impeller may include a set of blades (30, 42, 102, 134) on a first side of the impeller and a set of vanes (52, 104, 144) on a second side opposite the first. The blades on the first side and the vanes on the second side allow blood circulation from both the first and the second sides of the impeller. The artificial heart may also or instead include a diffuser (34) with adjustable vanes (32, 108) that enable variation in the output characteristics of the artificial heart pump. Various other artificial hearts, pumps, systems, and methods, including control systems and methods, are also disclosed.
Abstract:
The present invention refers to a mechanical coolant pump (10) for an internal combustion engine. The mechanical coolant pump (10) comprises a rotatable pump rotor wheel (12) with rotor blades (14) and with a central axial inlet opening (27). The pump rotor wheel (12) is mounted on an axial shaft (15) and is pumping the coolant radially outwardly. A non-rotating ring of pump stator blades (16, 17) encircles the circumference of the pump rotor wheel (12). The non-rotating ring of pump stator blades (16, 17) is formed by static blades (16) which are totally fixed in a defined position, and pivotable blades (17), whereby the pivotable blades (17) are pivotable around a pivot axis (18) arranged within the pivotable blades (17). The pivotable pump stator blades (17) can be positioned in at least three different positions, i.e. the open position, the closing position and an intermediate position.
Abstract:
The present Invention refers to an adjustable mechanical coolant pump 10 for an internal combustion engine. The mechanical coolant pump 10 is provided with a pump rotor wheel 12 with rotor blades 14, whereby the pump rotor wheel 12 pumps the coolant radially outwardly. The pumping performance of the pump 10 is controlled by variable pump stator blades 16 which are pivotably supported by a static blade holding ring 18 at a first axial blade end 20. The variable pump stator blades 16 are arranged radially outwardly of the pump rotor wheel 12. The pump rotor wheel 12 is provided with a radial blocking ring 22 which partially overlaps and covers a second axial blade end 24, The variable pump stator blades 16 are blocked by the blocking ring 22 against loosening and cannot drop-out.
Abstract:
A lubricant retainer for use in a pump bearing assembly, the bearing assembly which in a first operating configuration is lubricated by a relatively highly viscous lubricant, and which in a second operating configuration is lubricated by a less-viscous lubricant, the bearing assembly comprising a bearing housing having a bore extending therethrough for receiving a pump drive shaft, spaced-apart bearing mounting zones within said bore with a chamber therebetween, each bearing mounting zone arranged for the in use receipt of a bearing therein. Each zone has associated therewith one lubricant retainer, the lubricant retainer being adapted to be mounted within the bore adjacent the bearing mounting zone with which it is associated so as to form a barrier between the bearing mounting zone and the chamber when the pump bearing assembly is in the first operating configuration, the retainer being removed when the pump bearing assembly is in the second operating configuration.
Abstract:
An adjustment assembly for pump casing of a pump, the pump casing including a main part and a side part having a main axis and a side wall section extending laterally with respect to the main axis. The adjustment assembly is operable to cause relative displacement between the side part and the main part of the pump casing. The adjustment assembly includes a drive device and an actuator which can be activated externally of the pump, the drive device being operable to cause the relative displacement of the side part in response to activation of said actuator, the relative displacement capable of being a combination of axial and rotational movement.
Abstract:
The present invention relates to a centrifugal pump and a method of varying the operating characteristics of a centrifugal pump. The centrifugal pump has a pump housing, which in the preferred form comprises a front casing 22 and a back casing 24. The pump also includes an impeller 26. The present invention provides the centrifugal pump with one or more grooves 29 in the housing adjacent the impeller 26. The one or more grooves are adapted to removably receive a cutwater 28.
Abstract:
An impeller pump with thermostatically adjustable swirl-vanes, in use as an automotive engine-driven coolant pump. Flow variation is controlled by varying the orientation of the swirl-vanes. A change in orientation is effected by a thermal driver, e.g a wax-type thermostat, which senses coolant temperature. The swirl-vanes boost the flowrate when the coolant is hot, and decrease it when the coolant cools. The swirl-vanes are mounted for pivoting, and are located just upstream from the pump impeller. The traditional engine-thermostat function is provided inside the pumping-chamber, in that the swirl-vanes can be operated to close off a port to the engine radiator. The thermal driver opens the radiator-port as the coolant goes from Cold to Warm; as the coolant goes from Warm to Hot, the thermal driver operates the swirl-vanes from flow-reduce to flow-boost.
Abstract:
An impeller pump with thermostatically adjustable guide vanes (4) is suitable for use as an automotive coolant pump. The pump is driven by a constant speed electric motor (1) and flow variation is controlled by varying the orientation of the vanes (4). Orientation of the vanes (4) is effected by a wax-type thermostat, which senses coolant temperature: flow is increased when the coolant is hot, and decreased as the coolant cools. The variable guide vanes (4) are mounted for pivoting about radial axes, and are located just upstream from the pump impeller (2).