Rotary piston engine which acts as a pump, condenser or motor for a fluid

Patent metadata

Field	Value
Publication number	US-9670778-B2
Application number	US-201314397432-A
Country	US
Kind code	B2
Filing date	Feb 20, 2013
Priority date	Apr 25, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

The invention relates to a rotary piston engine ( 2 ) which operates as a pump, condenser or motor for a liquid or gaseous medium. The rotary piston engine ( 2 ) has a first gear ( 4 ) having a first central axis (I), a second gear ( 6 ) arranged opposite the first gear ( 4 ) and having a second central axis (II), and a drive shaft ( 8 ) having a third central axis (III) and a sliding plane ( 10, 12 ) fixedly connected to the drive shaft ( 8 ). The first central axis (I) and the second central axis (II) enclose an angle (α 3 ) which is not equal to 180°. The third central axis (III) and at least one central axis (I, II) from the group comprising the first central axis (I) and second central axis (II) enclose an angle (α 1, α2 ) which is not equal to 0° or 90°. The sliding plane ( 10, 12 ) and the central axis (I, II) are perpendicular to each other. The first gear ( 4 ) has a first end face ( 14 ) having a first has toothing ( 16 ) that h at least one first tooth ( 18 ), and the second gear ( 6 ) has a second end face ( 20 ) having a second toothing ( 22 ) that has at least one second tooth ( 24 ), wherein a first number of first teeth and a second number of second teeth differ from each other. The first tooth ( 18 ) and the second tooth ( 24 ) engage with each other in such a way that a working chamber ( 26 ) is formed by means of a meshing of the teeth ( 18, 24 ). A volume formed by means of the at least one working chamber ( 26 ) is changed by the meshing of the teeth ( 18, 24 ). The at least one working chamber ( 26 ) is delimited by a conically shaped inner wall ( 30 ) of a housing ( 28 ). The at least one working chamber ( 26 ) can be connected to a supply flow ( 40 ) and an outlet flow ( 42 ) for the medium. According to the invention, a component ( 4, 6 ) from the group comprising the first gear ( 4 ) and second gear ( 6 ) is coupled to the housing ( 28 ) such that a rotation of the drive shaft ( 8 ) causes only the components ( 4, 6 ) to tumble. The respective other components ( 4, 6 ) from the group comprising the first gear ( 4 ) and second gear ( 6 ) is coupled to the sliding plane ( 10, 12 ) such that the respective other component ( 4, 6 ) rotates and tumbles by means of a rotation of the drive shaft ( 8 ).

First claim

What is claimed is:

1. A rotary piston engine which operates as a pump, condenser or motor for a liquid or gaseous medium, the rotary piston engine comprising a first gear having a first central axis, a second gear arranged opposite the first gear and having a second central axis, and a drive shaft having a third central axis, and the drive shaft having sliding planes, wherein the first central axis and the second central axis together enclose an angle (α 3 ) which is not equal to 180°, wherein the third central axis (III) and one of the first or second central axes together enclose an angle (αI, α 2 ) which is not equal to 0° or 90°, wherein one of the first or second central axes is perpendicular to one of the sliding planes, wherein the first gear has a first end face having a first toothing that has at least one first tooth and the second gear has a second end face having a second toothing that has at least one second tooth, wherein a first number of first teeth and a second number of second teeth differ from each other, wherein the first tooth and the second tooth engage with each other in such a way that a working chamber is formed by means of a meshing of the first teeth and the second teeth, wherein a volume formed by means of the at least one working chamber is changed by the meshing of the first teeth and the second teeth, wherein the at least one working chamber is delimited by a spherically shaped inner wall of a housing, wherein the at least one working chamber is configured to be connected to a supply flow and an outlet flow for the medium, characterized in that one of the first gear or the second gear is coupled to the housing such that rotation of the drive shaft causes the one of the first gear or the second gear to tumble but not rotate, also characterized in that the other of the first gear or the second gear is in contact with one of the sliding planes such that the other of the first gear or the second gear rotates and tumbles simultaneously by means of rotation of the drive shaft.

2. The rotary piston engine according to claim 1 , characterized in that the first central axis and the third central axis enclose a first angle, α 1 , wherein the second central axis and the third central axis enclose a second angle, α 2 , wherein the first angle (αI) and the second angle (α 2 ) are not equal to 0° or 90°.

3. The rotary piston engine according to claim 2 , characterized in that the first central axis and the second central axis lie in a common plane.

4. The rotary piston engine according to claim 2 , characterized in that, starting from the third central axis, the first angle rotates counterclockwise and the second angle rotates clockwise.

5. The rotary piston engine according to claim 1 , characterized in that the sliding planes comprises a first sliding plane and a second sliding plane,
wherein the first sliding plane and the first gear are configured to be rotated relative to one another and are in contact with one another,
wherein the second sliding plane perpendicular to the second central axis,
wherein the second sliding plane and the second gear are configured to be rotated relative to one another and are in contact with one another.

6. The rotary piston engine according to claim 5 , characterized in that the first central axis, the second central axis and the third central axis (III) intersect at a common point, wherein the common point is a central point of a diameter of the inner wall.

7. The rotary piston engine according to claim 6 , characterized in that the first sliding plane and the second sliding plane intersect the common point.

8. The rotary piston engine according to claim 6 , characterized in that at least one of the first sliding plane and the second sliding plane do not intersect the common point.

9. The rotary piston engine according to claim 1 , characterized in that the second gear is fixedly coupled to the housing, wherein a stud is fixedly connected to an outer wall ( 38 ) of the second gear ( 6 ), the stud being guided in a recess in the inner wall, the recess being circular.

10. The rotary piston engine according to claim 1 , characterized in that at least one tooth from the group of gear teeth comprising at least one first tooth and at least one second tooth has a recess; thus enabling an overlap with at least one of the supply flow and the outlet flow to take place in a predetermined rotation angle range of the at least one tooth.

Assignees

• Bosch Gmbh Robert

Inventors

• Amesoeder Dieter

Classifications

• F04C3/08

  of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing · CPC title

• F01C21/18

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F01C1/088

  Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement · CPC title

• F01C1/084

  Toothed wheels · CPC title

• F01C3/08 Primary

  of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing · CPC title