Abstract: The present invention discloses a rotor for hydraulic motor comprising a plurality of vanes spacedly apart inserted into a plurality of vane slots formed on the rotor respectively, at least one groove is provided in outer edge of the rotor between the neighboring vanes, and extending inside along the axial direction of the rotor. wherein the groove has a first inner side and a opposite second inner side, and the first inner side of the groove is comb teeth-shaped. The rotor and the hydraulic motor using the rotor according to the present invention increases force bearing area by providing grooves on the rotor, so as to increase power output, lower the manufacturing cost, reduce the moment of inertia, and improve the starting speed and rotating speed.

Abstract: A pump has a rotor with two or more flexible vanes forming one or more compartments between adjacent vanes. The rotor is mounted offset relative to a rotor sleeve such that the volume of the compartments varies as the rotor rotates in the sleeve. Incoming fluid is supplied to the compartments along a plane perpendicular to the plane of rotation of the vanes. Fluid is discharged from the compartments through discharge slots in the sleeve leading into a discharge outlet which is tangential relative to the plane of rotation of the vanes. Each flexible vane is formed from at least two thin leaf springs separated by a layer of laminate and joined to a shoe which engages the inner surface of the sleeve as the rotor rotates. The pump in accordance with the present invention is energy efficient and uses significantly less power than comparable known devices.

Abstract: An axial-vane rotary device with a rotor assembly having a rotor core and a plurality of removable end blocks attached to the core, end blocks having recesses to encapsulate a vane restraint mechanism, and a removable end wall on one or more of the end blocks.

Abstract: A pump has a rotor with two or more flexible vanes forming one or more compartments between adjacent vanes. The rotor is mounted offset relative to a rotor sleeve such that the volume of the compartments varies as the rotor rotates in the sleeve. Incoming fluid is supplied to the compartments along a plane perpendicular to the plane of rotation of the vanes. Fluid is discharged from the compartments through discharge slots in the sleeve leading into a discharge outlet which is tangential relative to the plane of rotation of the vanes. Each flexible vane is formed from at least two thin leaf springs separated by a layer of laminate and joined to a shoe which engages the inner surface of the sleeve as the rotor rotates. The pump in accordance with the present invention is energy efficient and uses significantly less power than comparable known devices.

Abstract: Variable capacity swivelling vane pump, comprising a radially displaceable rotor (13) connecting eccentrically in a rotor cage (h) with guided vanes (15), which are rotatably supported in vane recesses (16) and on cage pins (14). The vanes (15) thus convert the rotor eccentricity (d) into a pivoting-propulsion movement. Furthermore, the rotor (13) rests on a hollow secondary shaft (7), which is mounted outside the pump casing in a bearing carrier (4) arranged in a horizontally movable manner. The rotor (13) is driven by means of the primary shaft (12) located in the hollow secondary shaft (7), the primary shaft being connected with the rotor cage (h). This structure has small oscillating masses, is versatile, easy to manufacture and assemble and operates with minimum frictonal losses and is free from bearing and sealing problems.

Abstract: A rotary device and method for replacing apex seals is provided. The rotary device comprises a housing having a peripheral wall surface and two inner side walls that define a chamber. A rotor is located within the chamber and rotates therein. The peripheral wall surface of the housing includes a plurality of slots having disposed therein an insert, a wave spring, and an apex seal. The apex seal extends radially outward from the slot and is spring biased by the wave spring that is sandwiched between the insert and apex seal. The side walls of the housing include spring biased button seals. The button seals are urged against a portion of the apex seal. A side wall of the housing includes a rotatable nut for relieving the spring pressure on the button seal and an aperture covered by a removable cap for accessing the insert member so that it can be removed. A method of replacing the apex seals is also provided.

Abstract: An improved hydraulic device includes a rotor which is circumscribed by a cam surface. A series of peripheral slots are formed in the rotor. Each of the slots receives a pumping element which is spring urged toward engagement with the cam surface as the rotor is rotated relative to the cam surface. Each rotor slot defines a spring receiving recess extending from one major side surface of the rotor to a location between the major side surfaces of the rotor. The recess allows axial movement of a portion of the spring in one axial direction and blocks axial movement of that portion of the spring in the other axial direction. Each pumping element preferably defines a spring receiving recess which allows axial movement of another portion of the spring in the opposite axial direction and blocks movement of the spring in the one axial direction. The spring recesses facilitate assembly of the hydraulic device and resist undesirable spring movements during operation of the device.