Double-acting wobble plate Stirling engine

Abstract

According to the double-acting wobble plate Stirling engine, periodic swinging of a wobble plate is achieved through a plurality of air cylinders distributed in a circumferential array mode and a nutation transmission mechanism, and working medium gas distribution and power output are synchronously completed. The expansion cavities and the compression cavities of the adjacent air cylinders are communicated through heat regenerators, and the phase difference of the air cylinders is set to be 360 degrees / N, so that the volume change conforms to the volume phase relation of Stirling circulation; the device has the advantages of high volume power, low vibration noise, high multifunctional expansibility and the like.

Description

Technical Field

[0001] This invention relates to the field of Stirling engine technology, specifically to a double-acting Stirling engine based on a swivel disc structure, and more particularly to a highly efficient and compact thermodynamic device that achieves working fluid distribution and power output synchronously through the swivel disc. Background Technology

[0002] Traditional Stirling engines achieve working fluid circulation through the reciprocating motion of pistons, resulting in problems such as high vibration and low mechanical efficiency. Chinese patent ZL2017101557302 discloses a single-acting sway-plate Stirling engine, which, although using a sway plate instead of a valve train piston, still relies on a reciprocating power piston, limiting its size and power output. Double-acting Stirling engines theoretically offer higher power density, but existing technologies often employ complex crankshaft mechanisms to achieve multi-cylinder phase synchronization, leading to structural redundancy and difficulty in controlling vibration. Therefore, there is an urgent need for a double-acting Stirling engine that can eliminate reciprocating motion inertial losses and achieve precise phase control. Summary of the Invention

[0003] This invention aims to solve the vibration control and space efficiency problems of a double-acting Stirling engine. It achieves working fluid distribution and power output by synchronizing the swing of a swivel plate, eliminating inertial losses from reciprocating motion, and improving volumetric power.

[0004] Technical solution: A double-acting oscillating disc Stirling engine, comprising cylinders, a flywheel, a central shaft, partitions, and a regenerator, characterized in that: multiple independent cylinders are circumferentially arrayed around the central shaft, each cylinder is divided into an independent chamber by radial partitions, and an isolation oscillating disc is provided in the chamber to divide the chamber into an expansion chamber and a compression chamber; the expansion chamber of an adjacent cylinder is connected to the compression chamber of the next cylinder through the regenerator, and the circumferential phase difference of the cylinders around the central shaft is set to 360° / N (N is the number of cylinders); a nutation transmission mechanism is used to realize power output. The nutation transmission mechanism includes a sphere, a linkage shaft, and a slant shaft. The sphere is nested within a spherical shell, and multiple linkage shafts are symmetrically distributed on the equatorial plane of the sphere. The shaft ends pass through vertical slots in the spherical shell and connect to an isolation oscillating plate. The slant shaft is connected to a flywheel at a non-orthogonal angle, and the flywheel is connected to a central shaft, thereby converting rotational motion into the nutation of the oscillating plate's periodic oscillation. A hot-end heating module and a cold-end heat dissipation module are respectively provided at the bottom and top of the cylinder, forming an axial temperature gradient. The regenerator has a porous medium structure, connecting the expansion chamber outlet and compression chamber inlet of adjacent cylinders to form a closed-loop working fluid path. Compared to existing technologies, this invention uses the oscillation of the oscillating plate to replace the reciprocating motion of the piston, reducing inertial force by more than 60%. The phase difference between multiple cylinders and the geometric constraints of the nutation transmission achieve precise synchronization of volume changes, resulting in increased volumetric power. Attached Figure Description

[0005] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figure 1 This is an isometric schematic diagram of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the cylinder interior according to an embodiment of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the cylinder interior according to an embodiment of the present invention. Figure 2 ; Figures 1-3 1. Cylinder, 2. Isolation plate, 3. Sphere, 4. Limiting shaft, 5. Inclined shaft, 6. Central shaft, 7. Flywheel, 8. Spherical shell, 9. Regenerator, 10. Connecting pipe, 11. Partition plate, 12. Limiting slot, 13. Expansion chamber, 14. Compression chamber. Detailed Implementation

[0006] exist Figures 1-3 In the cylinder (1), there are four partitions (11). The partitions (11) divide the swivel plate into four isolation swivel plates (2). The isolation swivel plates (2) divide the cavity in which they are located into an expansion cavity (13) and a compression cavity (14). The isolation swivel plates (2) are connected to the limiting shaft (4). The limiting shaft (4) passes through the limiting slot (12) on the spherical shell (8) and is connected to the sphere (3). One end of the sphere (3) is connected to the inclined shaft (5). The inclined shaft (5) can rotate around its own axis. The inclined shaft (5) is connected to the flywheel (7). The flywheel (7) is connected to the central shaft (6). The flywheel (7) can rotate around the central shaft (6). The two ends of the regenerator (9) are connected to the expansion cavity and compression cavity of the adjacent cylinder through the connecting pipe (10). The inner wall of cylinder (1) is a cavity formed by the sweeping of the swivel disc. The bottom and top of cylinder (1) are the hot and cold ends of the Stirling engine, and a hot end heating module and a cold end heat dissipation module can be installed. The isolation swivel disc (2) acts as a double-acting piston. When the swivel disc transmission mechanism rotates around the central axis (6), the volume change of the expansion chamber swept by the isolation swivel disc (2) in one of the independent cylinders and the compression chamber in the adjacent independent cylinder connected to it through the regenerator satisfies the Stirling cycle law, forming a complete Stirling cycle system. The four independent cylinders interact with each other to form a four-cylinder double-acting swivel disc Stirling engine. This embodiment mainly uses a four-cylinder double-acting swivel disc Stirling engine with a circular cylinder as an example. Other numbers of cylinders and other cylinder combinations with the same principle are also included in the protection scope of this invention. The flywheel can be replaced by a bidirectional drive motor, which realizes the reverse Stirling cycle by driving the inclined shaft in the opposite direction to form a cooling mode.

Claims

1. A double-acting oscillating disc Stirling engine, comprising a cylinder, a flywheel, an oscillating disc transmission mechanism, a central shaft, a diaphragm, and a regenerator. Its characteristics are: a. Multiple independent cylinders are arranged in a circumferential array around the central axis. Each cylinder is divided into an independent chamber by a radial partition. Each chamber is equipped with an isolation plate, which divides the chamber into an expansion chamber and a compression chamber. The isolation plate is connected to the plate transmission mechanism, which is connected to the flywheel. The flywheel is connected to the central axis. The connection method allows the isolation plate to swing when the flywheel rotates around the central axis. b. The expansion chamber of the adjacent cylinder is connected to the compression chamber of the next cylinder through a regenerator, and the circumferential phase difference of the cylinder around the central axis is set to 360° / N (N is the number of cylinders).

2. The double-acting oscillating disc Stirling engine according to claim 1, characterized in that: The regenerator has a porous medium structure with a porosity gradient distribution along the flow direction of the working fluid.

3. The double-acting oscillating disc Stirling engine according to claim 1, characterized in that... There are four independent cylinders, and the volume change phase of adjacent cylinders is 90°.

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