Patents-Review.com
🔗 Permalink
Patent application title:

Rotary pump and rotary motor

Publication number:

-

Publication date:
Application number:

14/968,978

Filed date:

2015-12-15

✅ Patent granted

Patent number:

US 9,638,186 B1

Grant date:

2017-05-02

PCT filing:

-

PCT publication:

-

Examiner:

Kenneth Bomberg | Deming Wan

Adjusted expiration:

2035-12-15

Smart Summary: A rotary vane pump or motor has a rotor that spins inside a cylindrical housing, creating a working chamber that reduces friction. The rotor has a hinged partition that moves with it, acting as a seal to maintain pressure while allowing for expansion and contraction. This design minimizes wear and tear on the parts, making the device more efficient and longer-lasting. End plates hold everything together and include ports for pressure and non-pressure connections. Overall, this invention aims to improve the performance of rotary engines by addressing common issues with sealing and friction. 🚀 TL;DR

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.

Inventors:

Applicant:

Interested in similar patents?

Get notified when new applications in this technology area are published.

Create Free Alert

Classification:

  1. Mechanical engineering
  2. Positive displacement machines for liquids; pumps for liquids or elastic fluids

F04C2/3445 »  CPC main

Rotary-piston machines or pumps having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the vanes having the form of rollers, slippers or the like

F01C1/3445 »  CPC further

Rotary-piston machines or engines having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the vanes having the form of rollers, slippers or the like

F01C1/336 IPC

Rotary-piston machines or engines having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group and relative reciprocation between the co-operating members with vanes hinged to the outer member and reciprocating with respect to the inner member and hinged to the inner member

F01C1/30 IPC

Rotary-piston machines or engines having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members

F04C2/324 IPC

Rotary-piston machines or pumps having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups and relative reciprocation between co-operating members with vanes hinged to the inner member and reciprocating with respect to the outer member

F04C2/336 IPC

Rotary-piston machines or pumps having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups and relative reciprocation between co-operating members with vanes hinged to the outer member and reciprocating with respect to the inner member and hinged to the inner member

F04C2/30 IPC

Rotary-piston machines or pumps having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members

F04C18/336 IPC

Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group and relative reciprocation between the co-operating members with vanes hinged to the outer member and reciprocating with respect to the inner member and hinged to the inner member

F04C18/30 IPC

Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members

F04C2/344 IPC

Rotary-piston machines or pumps having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member

F01C1/344 IPC

Rotary-piston machines or engines having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member

Description

CROSS-REFERENCE TO RELATED INVENTIONS

(Not Applicable)

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

(Not Applicable)

BACKGROUND OF THE INVENTION

(1) Field of the Invention

U.S. CLASS 418, Rotary Expansible Chamber Devices

    • U.S. CLASS 418/225

(2) Description of Related Art

Rotary pumps and rotary motors have some major limitations, e.g. radial friction between the moving parts and housing wall would cause significant frictional loss and unacceptable wear so the device was inefficient and won't last long.

Furthermore, a rotary machine to replace the conventional piston-crankshaft engine was a long time effort since James Watt's three-vane rotary of 1782, including Felix Wankel in the 1950s and US patent 2008/0310985 A1 by Sorby Reider dated December 2008; but unfortunately none of them succeeded as expected.

By analyzing all the prior designs, the problems were largely caused by the dynamic sealing for a variable enclosed space, and friction between the housing and moving parts.

So nevertheless how attractive could be the promises and advantages, unless these difficulties are overcome, the rotary engine was always a delusion to all inventors, for a couple of hundred years in the past.

BRIEF SUMMARY OF THE INVENTION

This is an effort to solve the sealing and friction issues with regard to rotary pumps and rotary motors, ready for the construction of a new type of rotary IC engine, by adopting:

    • a housing assembly with a rotatable cylindrical sleeve to freely revolve around the inside rotating parts, so that the radial solid-to-solid sliding movement and friction therebetween is substantially avoided;
    • a cylindrical rotor mounted on a straight shaft with bearings on both ends, eccentrically arranged within the rotating housing;
    • a partition element of a vane being able to travel with the rotor and follow the housing orbit incident to the expansion and contraction of the working chamber, and also performs a true and responsive radial sealing as a dynamic check valve between housing chamber and inside rotating parts;
    • the rotor assembly along with the housing assembly being sandwiched between end-plates which contain pressure and non-pressure ports to communicate duly with respective high and low pressure zones of the working chambers.

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

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

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

DETAILED DESCRIPTION OF THE INVENTION

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.

Performance Comparison Regarding Sealing and Friction:

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

    • 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

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.

Claims

The invention claimed is:

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.

Resources

Images & Drawings included:

Fig. 01 - Rotary pump and rotary motor
Fig. 01
Fig. 02 - Rotary pump and rotary motor
Fig. 02
Fig. 03 - Rotary pump and rotary motor
Fig. 03

Sources:

Similar patent applications:

Recent applications in this class: