Rotary Piston Machine Rotor Spherical Contour Gap Losses
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Solution Overview
Problem
Existing rotary piston machines require a generously dimensioned gap between the housing and the drive or output parts, leading to inefficiencies and manufacturing complexities, as well as increased wall friction and gap losses due to the need for a spherical housing interior.
Innovation Solution
The design minimizes this gap by integrating the spherical ring-shaped housing inner wall into the rotor, reducing the number of components needed to delimit the working space from three to two (rotor and counter-rotor), allowing for more precise manufacturing and eliminating the need for adjustment processes, and incorporating a clasping mechanism to maintain the rotor-counter-rotor arrangement, reducing wall friction and gap losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a spherical housing interior is used to accommodate the rotor and counter-rotor, then the machine can operate with a compact design, but the gap between the housing and the drive/output parts must be generously dimensioned, leading to increased gap losses and wall friction
Solution Approach 1:
The patent merges the housing inner wall function into the rotor by providing the rotor with a spherical outer contour that directly forms the working space boundary. This eliminates the need for a separate spherical housing interior and reduces the number of components from three (rotor, counter-rotor, housing) to two (rotor, counter-rotor), thereby minimizing gap losses and wall friction while maintaining compact operation
2Volume of moving object
If a spherical housing interior is used, then the rotor and counter-rotor can be accommodated, but the manufacturing precision required to align the two centers of the spherical interiors is extremely high, making assembly difficult
Solution Approach 1:
The patent eliminates the alignment problem by integrating the spherical surface directly into the rotor as its outer contour. This removes the need for two separate spherical interiors (housing and counter-rotor) whose centers must coincide, thereby dramatically reducing manufacturing complexity while maintaining the compact spherical working space
3Loss of energy
If the gap between the housing and rotor/counter-rotor is reduced to minimize losses, then energy efficiency improves, but manufacturing tolerances become extremely difficult to achieve
Solution Approach 1:
The patent reduces manufacturing complexity by eliminating the housing component that would require precise gap tolerances. The rotor's spherical outer contour directly defines the working space boundary, removing the need for a separately manufactured housing with tight dimensional tolerances, thereby enabling smaller gaps without excessive manufacturing difficulty
Data Source
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AI summary
The invention relates to a rotary piston machine which operates as a pump, a compressor, or a motor and which has a rotor (2) and a counter rotor (4), said counter rotor (4) being disposed opposite the rotor (2). The rotor (2) has a first end surface (6) with a first toothing system (8). The counter rotor (4) has a second end surface (14) with a second toothing system (16). The first (8) and the second toothing system (16) are each made of at least one tooth (10, 18) and a tooth space (12, 20). The toothing systems (8, 16) are in engagement with each other such that working chambers (24) are formed by means of the meshing of the teeth (10) of the first toothing system (8) and the teeth (18) of the second toothing system (16), wherein volumes that are formed by the working chambers (24) are changed by means of the meshing of the teeth (10, 18). The rotor (2) has a first rotational axis (I). The counter rotor (4) has a second rotational axis (II). The first rotational axis (I) and the second rotational axis (II) enclose an angle (f) that is not equal to 0 degrees. According to the invention, the rotor (2) has a first spherical ring-shaped inner wall (26) and the counter rotor (4) has a first spherical ring-shaped outer contour (28) that is designed in a complementary manner with respect to the first spherical ring-shaped inner wall (26) of the rotor (2).