Rotary pump and rotary motor

Abstract

A rotary vane pump or rotary vane motor including a rotatable rotor being eccentrically arranged within a rotatable cylindrical housing sleeve defining a freely rotary working chamber which takes out the relative sliding movement and friction inside to outer housing bearing. A partition element of a vane hingedly attached to the rotor; wherein the partition element travels with the rotor following the orbit of the housing incident to the expansion and contraction of the working space performing as a true dynamic radial seal; The rotor assembly along with the housing assembly being sandwiched between end-plates to fulfill dynamic side seal; The end-plates may contain pressure and non-pressure ports as well as holes for shaft, bearings, brackets and mounting hardware.

Claims

1. A rotary vane pump or motor comprises: a housing assembly including a cylindrical housing sleeve surrounded by housing bearing and housing frame; wherein the cylindrical housing sleeve having a housing axis of revolution, defining a rotating working space and a working orbit; a rotor assembly including a rotor, a single vane and side-disks with fluid passage, along with the housing assembly and side sealing rings being sandwiched between end-plates to fulfill the side sealing axially; wherein the rotor having a rotor axis as the rotor mounted on a straight shaft with shaft bearings on both ends, wherein the rotor being eccentrically positioned within the cylindrical housing sleeve to form a working chamber such that the rotor axis and the housing axis being parallel and spaced apart from each other; the single vane being hingedly attached to the rotor periphery flipping to-and-fro relative to the rotor axis while traveling with the rotor and following the orbit of the cylindrical housing sleeve, separating high and low pressure zones of the working chamber, incident to the expansion and contraction of the rotating working space; while the single vane engaging an inner surface of an inner wall of the cylindrical housing sleeve under working pressure, a true radial sealing being formed as a dynamic check valve therebetween; wherein the cylindrical housing sleeve is configured to rotate accordingly around the rotor assembly including the rotor and the single vane, so that the relative sliding movement and friction between the inner wall of the cylindrical housing sleeve and the rotor assembly being conveyed to and borne on the housing bearing; wherein the end-plates contain pressure and non-pressure port communicating duly with respective high and low pressure zones of the working chamber via passages of the side-disks and the rotor, wherein the endplates also contain holes for the shaft, the shaft bearings, and mounting fixtures.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

(1) FIG. 1 is a schematic partial section view of a rotary vane motor.

(2) FIG. 2 is a perspective exploded view with partial section for a rotary vane motor.

DETAILED DESCRIPTION OF THE INVENTION

(3) A rotary machine to replace the conventional reciprocating piston-crankshaft engine is a long felt need as the potential advantages are so attractive, but nobody is successful beyond the stage of experimental prototype with poor performance, because of the difficulties to obtain both desired characteristics, in a simple and effective structure: perfect dynamic sealing for enclosed working space, and least friction between the housing chamber surface and inside rotating parts.

(4) Performance Comparison Regarding Sealing and Friction:

(5) TABLE-US-00001 performance expectation Sealing between Friction between working member and working member and Comparing housing wall, radial housing wall, radial for designs below portion for rotary: rotary: Conventional piston- fair with piston ring reasonable crankshaft machines Sliding vane rotary difficult, tend to fail significant, increasing on working pressure on sealing strength and and wear-out working pressure Felix Wankel in the difficult, worsening on significant, increasing 1950s working pressure and on sealing strength and wear-out, tend to fail working pressure James Watt's three- none before vane significant while vane rotary of 1782 contacting housing vane sliding on housing wall US patent very good if very significant while 2008/0310985 A1 by disregarding vane tip most portion of vanes Sorby Reider roller, but tends to fail sliding on housing wall as working parts worn- under working pressure, down too soon also rotor part sliding on stator part The present perfect as check valve substantially avoided application while housing sleeve rotating around inside rotating parts.

PARTS LIST

(6) 01 Housing sleeve 02 Housing bearing 03 Housing Frame 04 (cancelled) 05 (cancelled) 06 Rotor for vane, see FIGS. 3, 4 07 Vane, see FIGS. 3, 4 08 Shaft 09 Shaft bearing 10 Side disk 11 Fluid passage 12 Side sealing rings 13 End-plates 14 Pressure port 15 Non-pressure port 16 Mounting bolts 17 Mounting Nuts

(7) The present application provides components of: a housing assembly including a cylindrical sleeve 01 surrounded by housing bearing 02, and housing frame 03; where the sleeve 01 has a revolution axis defining a rotary working space and a working orbit; where the housing sleeve 01 is able to correspondingly rotate around all inside rotating parts including Rotor 06 and Vane 07, therefore the relative movement and friction therebetween is transferred to and borne on the outer housing bearing 02; a rotor assembly including a rotor having a rotating axis mounted on a straight shaft 08 with shaft bearings 09 on both ends, where the rotor is eccentrically arranged within the housing sleeve; where the rotor axis and housing axis is parallel and apart from each other to form a working chamber, and a replaceable working partition element to separate the low and high pressure zones of the working chamber, can be seen in FIGS. 3, 4: a vane 07 hingedly attached to the periphery of rotor 06; wherein the partition element vane 07 is able to move or flip, to-and-fro radially relative to the rotor axis incident to the expansion and contraction of the working chamber while traveling with the rotor and follow the orbit of the housing; while the partition element vane 07 engages the housing inner surface under working pressure, a true radial sealing is formed as a dynamic check valve between the partition element vane 07, the rotor 06 and the housing sleeve 01 inner surface; the rotor assembly including the rotor, the partition element and side-disks 10 with fluid passage 11, and side sealing rings 12, along with the housing assembly being sandwiched between end-plates 13 to complete the side sealing axially; where the end-plates may contain pressure port 14, and non-pressure port 15; wherein the pressure and non-pressure port communicates timely with respective high and low pressure zones of the working chamber; where the endplates also contain holes or cavities for shaft 08, shaft bearings 09, mounting bolts 16, and mounting nuts 17.