Prime Mover Assemblies and Methods

Abstract

Prime movers are provided that can include: a pair of cylindrical members about a center rod, a fixed member about the center rod between the pair of cylindrical members; wherein the pair of cylindrical members rotate with the center rod in relation to the fixed member; a housing extending between the cylindrical members; and a plurality of chambers between the opposing bases of the cylindrical members and the fixed member. Methods for rotating members in relation to a fixed member are also provided. The methods can include rotating a pair of cylindrical members in relation to a fixed member about a center rod along a shared axis within a housing extending between the pair of cylindrical members.

Claims

1. A prime mover comprising: a pair of cylindrical members about a center rod aligned along a central axis of the cylindrical members, each of the cylindrical members defining first outer sidewalls and first opposing bases, one of the first opposing bases of one member opposing one of the first opposing bases of the other member, a fixed member about the center rod between the pair of cylindrical members aligned along the axis of the fixed member, the fixed member defining second outer sidewalls and second opposing bases; wherein the pair of cylindrical members rotate with the center rod in relation to the fixed member and wherein each of the bases of the fixed member opposes a separate base of the cylindrical member; a housing extending between the cylindrical members; and a plurality of chambers between the opposing bases of the cylindrical members and the fixed member.

2. The prime mover of claim 1 further comprising a plurality of vanes slidably engaged within the fixed member.

3. The prime mover of claim 2 wherein each of the vanes extends along a length to a tip operably engaging a cylindrical member.

4. The prime mover of claim 3 further comprising sealing elements between the tip and the cylindrical member.

5. The prime mover of claim 1 further comprising a plurality of ports within the fixed member.

6. The prime mover of claim 1 wherein the fixed member is rotatably sealed to the center rod.

7. A method for rotating members in relation to a fixed member, the method comprising: rotating a pair of cylindrical members in relation to a fixed member about a center rod along a shared axis within a housing extending between the pair of cylindrical members.

8. The method of claim 7 further comprising providing source energy to a plurality of chambers located between opposing bases of the cylindrical members and fixed member.

9. The method of claim 7 further comprising providing the source energy through a plurality of ports within the fixed member.

10. The method of claim 7 further comprising transporting fluid through ports within the fixed member.

11. The method of claim 10 wherein the fluid is pumped.

12. The method of claim 10 wherein the fluid is compressed.

13. The method of claim 10 wherein the one of the pair of cylindrical members defines a first interface with one base of the fixed member and another of the pair of cylindrical members defines a second interface with the other base of the cylindrical member, each of the interfaces performing a different physical function.

14. The method of claim 13 wherein one physical function can include compression, fluid transport, expansion, or combustion.

15. The method of claim 14 wherein the first interface is configured to perform compression and the second interface is configured to perform expansion.

16. The method of claim 7 wherein the center rod is motorized from a separate assembly.

Description

DRAWINGS

[0006] Embodiments of the disclosure are described below with reference to the following accompanying drawings.

[0007] FIG. 1 is an elevational view of the general elements of a prime mover according an embodiment of the disclosure.

[0008] FIG. 2 is a perspective view of a prime mover according to an embodiment of the disclosure.

[0009] FIG. 3A is a schematic illustrating an intake stroke of the rotary engine of FIG. 2.

[0010] FIG. 3B is a schematic illustrating a compression stroke of the rotary engine of FIG. 2.

[0011] FIG. 3C is a schematic illustrating an expansion stroke of the rotary engine of FIG. 2.

[0012] FIG. 3D is a schematic illustrating an exhaust stroke of the rotary engine of FIG. 2.

[0013] FIGS. 4A-4B is a depiction of a rotating member and associated inlet and discharge cycles in an engine configuration.

[0014] FIGS. 5A-5B is a depiction of a rotating member and associated inlet and discharge cycles in an pump configuration.

[0015] FIGS. 6A-6B is a depiction of a rotating member and associated inlet and discharge cycles in a compressor configuration.

[0016] FIGS. 7A-7B is a depiction of a rotating member and associated inlet and discharge cycles in an expander configuration.

DESCRIPTION

[0017] This disclosure is submitted in furtherance of the constitutional purposes of the U.S. Patent Laws to promote the progress of science and useful arts (Article 1, Section 8).

[0018] The inventors have recognized that the prior art held the cams and housing stationary and the rotor and vanes rotated within the housing. At least one benefit of some of the embodiments of the present disclosure is the reduction of centripetal forces which act on the vanes of prior art rotary engines. When the vanes rotate, centripetal forces can push the vanes outward with increasing force as RPM increases. These forces can cause the vanes to apply more pressure on the outside diameter seals and less force on the internal diameter seals. The forces become a limiting factor on the speed at which the device can rotate before friction and sealing forces are too large and will cause failure of the device.

[0019] The present disclosure provides prime mover assemblies for configuration as engines, pumps, compressors, and/or expanders.

[0020] There is accordingly disclosed a rotary engine that can include a housing about spaced-apart and opposing undulating rotating cam surfaces. A fixed member is also disposed within the housing between the undulating cam surfaces. The fixed member can have a plurality of slots extending axially therethrough. Within these slots can be a plurality of vanes and each one of the vanes is slidably received by a corresponding one of the slots in the member. The housing is affixed to and rotates with the two rotating cams.

[0021] There is further disclosed, a rotary compressor that includes a rotatable housing and cams. There is further disclosed, a rotary expander that includes a rotatable housing and cams. There is further disclosed, a rotary pump that includes a rotatable housing and cams.

[0022] The present disclosure will be described with reference to FIGS. 1-7B. Referring first to FIG. 1 a prime mover assembly 10 is depicted that includes a pair of cylindrical members 12 about a center rod 14 aligned along a central axis of cylindrical members 12. Each of members 12 can include outer sidewalls 16 and opposing bases 18. In accordance with example implementations, one of the opposing bases 20 can oppose another opposing base 20 of the other cylindrical member 12.

[0023] Assembly 10 can also include a fixed member 22 about the center rod 14 and between cylindrical members 12. Member 22 can define outer sidewalls 24 and opposing bases 26. Fixed member 22 can be fixed in relation to rotation of cylindrical members 12.

[0024] Each of opposing bases 26 can oppose one of opposing base 20 to provide and interface between the fixed and rotating members. Within this interface can be chambers configured to receive fluid in some form and manipulate same. The fluid may be received as source energy and converted to mechanical energy, for example during combustion, or expansion. As another example, fluid may be received and compressed. And as another example, fluid may be simply transported as in a pump.

[0025] A housing 28 can be coupled to one or both of the cylindrical members and configured to rotate about the fixed member. The prime mover assembly of the present disclosure includes a rotating housing about a fixed member. Mechanical force can be obtained from the mover in multiple ways, one of which includes affixing a member to one or both of the rotating members.

[0026] Additionally, while shown and referred to as cylindrical, the members need not be perfectly cylindrical. The members only need to be balanced sufficiently to rotate efficiently. Therefore, non-cylindrical but balanced members about the center rod will meet the definition of cylindrical member.

[0027] Referring next to FIG. 2, a prime mover 30 configured as a rotary engine is depicted. Prime mover 30 generally can include a housing 28 which can define a substantially cylindrical internal chamber 32 defined by an annular wall 34 extending between opposed end walls 36 and 38. There are undulating, rotating cam surfaces 40 and 42 disposed within the internal chamber 32 on respective ones of the end walls 36 and 38. There is also a substantially cylindrical member 22 disposed within the internal chamber 32 between the undulating cam surface; 40 and 42. Member 22 is mounted on a shaft 44. Member 22 can include a plurality of slots extending axially therethrough, for example slots 46 and 48, each of which receives a corresponding slidable vane, for example vanes 50 and 52, which reciprocate axially in a direction parallel to the shaft 44 when the cam 39 and 40 rotates. Mover 10 can also includes an air intake port 54, and an exhaust port 56 on each end wall thereof. The air intake port 54, and the exhaust port 56 are shown for one of the end walls 36. It will however be understood by a person skilled in the art the other end wall has a substantially identical structure.

[0028] Air received through the air intake port 54 during a single rotation is trapped between adjacent vanes 50 and 52 and member 22 surface or base and cam surface or base (39/40) as shown in FIG. 3A. The air is then compressed as the vanes rotate and move up the cam surface, the volume is constantly decreasing as the vanes approach the peak of the cam surface as shown in FIG. 3B. Fuel received though the fuel injection port 58 is ignited and expands during an expansion stroke due to an increasing volume between the adjacent vanes 50 and 52 the member 22 surface and cam surface or base 39/40. As the vanes move down the cam surface to towards the lowest point on the cam, as shown in FIG. 3C, expansion energy is converted to rotary motion. Exhaust gases are then forced out through the exhaust port 56 as the vanes pass over the port as shown in FIG. 3D. The rotary device is different as the cam and housing rotate whereas, the engine disclosed in U.S. Pat. No. 5,509,793 which issued on Apr. 23, 1996 to Cherry et al. which is incorporated herein by reference, has a stationary cam and housing with a rotor and rotating vanes.

[0029] Referring next to FIGS. 4A-7B, rotating members are shown in conjunction with corresponding inlet outlet diagrams for various prime mover configurations.

[0030] Referring to FIG. 4A-B, the prime mover is configured as an engine with rotating members define chambers and ports as follows: exhaust port 60, fuel injection port 62, compression ramp 64, and intake port 66.

[0031] Referring to FIGS. 5A-5B, the prime mover is configured as a pump with discharge 70, suction 72, discharge 74, and suction 76.

[0032] Referring to FIGS. 6A-6B, the prime mover is configured as a compressor with low pressure inlet 80, high pressure inlet 82, low pressure inlet 84, and high pressure discharge 86.

[0033] Referring to FIGS. 7A-7B, the prime mover is configured as an expander with low pressure discharge 90, high pressure inlet 92, low pressure discharge 94, and high pressure inlet 96.

[0034] In accordance with example implementations, mover can be configured to perform to distinct functions on either side of the fixed member. For example, one interface may perform pumping while the other interface performs combustion.

[0035] In compliance with the statute, embodiments of the invention have been described in language more or less specific as to structural and methodical features. It is to be understood, however, that the entire invention is not limited to the specific features and/or embodiments shown and/or described, since the disclosed embodiments comprise forms of putting the invention into effect. The invention is, therefore, claimed in any of its forms or modifications within the proper scope of the appended claims appropriately interpreted in accordance with the doctrine of equivalents.