JP2944301B2 - Regenerator for Stirling engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerator for a Stirling engine.

[0002]

2. Description of the Related Art As a prior art of a regenerator for a Stirling engine, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 62-233688. This conventional technique will be described with reference to FIG. 4. A plurality of discs 72 each having a plurality of vertically elongated holes 71 are stacked in a housing 73 after the direction of each vertically elongated hole 71 is appropriately adjusted. Regenerator 70 is constituted. Thus, a plurality of disks 7
By appropriately adjusting the direction of the second vertically long holes 71, the surface area of the disk 72 existing in the housing 73 is increased, the space volume in the housing 73 is reduced, and the flow resistance of the working gas is also reduced. It becomes possible.

Here, a compression space and an expansion space of a Stirling engine (not shown) are connected to both ends of the housing 73, and a working gas reciprocates in a regenerator 70 for the Stirling engine. Then, when the working gas flows from the expansion space to the compression space, heat is transferred from the working gas to the plurality of disks 72 and heat is stored in the regenerator 70 for the Stirling engine, and the working gas flows from the compression space to the expansion space. At this time, heat is transferred from the plurality of disks 72 to the working gas to raise the temperature of the working gas.

[0004]

However, when the engine speed of the Stirling engine is high, the flow rate of the working gas increases, so that the working gas mainly flows through the center of the regenerator 70 for the Stirling engine. . As a result, the outer peripheral portion of the disk 72 cannot generate the heat storage effect, and has a problem that the heat storage efficiency of the heat storage device 70 for the Stirling engine is reduced.

[0005] Therefore, in the present invention, the technical problem is to improve the heat storage efficiency of the heat storage device for a Stirling engine.

[0006]

Configuration of the Invention

[0007]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problem of the present invention are a cylindrical housing and a cylindrical housing having the same outer diameter as the inner diameter of the cylindrical housing. A Stirling engine comprising a relatively low-density ring-shaped mesh stacked in a housing, and a relatively high-density disk-shaped mesh having the same outer diameter as the inner diameter of the ring-shaped mesh and stacked in a cylindrical housing. That is, a heat storage device is configured.

[0008]

According to the above-mentioned technical means of the present invention, the distribution of working gas basins is made uniform by the meshes having different densities stacked in the regenerator for the Stirling engine.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the technical means of the present invention will be described below with reference to the accompanying drawings.

In a heat storage unit 10 for a Stirling engine according to an embodiment of the present invention shown in FIGS.
Inside of 1 are meshes (for example, made of metal) having different densities 1
2 and 13 are stacked in large numbers. The relatively low-density ring-shaped mesh 12 has the same outer diameter as the inner diameter of the cylindrical housing 11, and the relatively high-density disk-shaped mesh 13 has the same outer diameter as the inner diameter of the ring-shaped mesh 12. I have.

More specifically, each ring-shaped mesh 12 has a thickness of 0.075 mm and a mesh No. Fifteen
0, the wire diameter is 0.060 mm, and the disk-shaped mesh 13 has a thickness of 0.075 mm, mesh N
o. 200, wire diameter 0.050 mm. Than this,
It can be seen that the wire diameter of the ring-shaped mesh 12 is relatively large, and the wire diameter of the disk-shaped mesh 13 is relatively small.

Further, as shown in FIG. 3, a punch plate 14 having a large number of holes is formed at both open ends of the cylindrical housing.
Are fixed by brazing.

The operation of the regenerator 10 for a Stirling engine having the above configuration will be described.

A working gas (for example, He gas) of a Stirling engine (not shown) reciprocates axially in the Stirling engine regenerator 10 with the operation of the Stirling engine (from the left end face to the right end face in FIG. 1, from the right end face) To the left edge)
I do. First, when the working gas flows from the expansion space (not shown) of the Stirling engine to the compression space, the heat amount of the working gas in the heat storage unit 10 for the Stirling engine is stored in the meshes 12 and 13.

As a result, the temperature of the working gas drops. Further, when the working gas flows from the compression space to the expansion space, the amount of heat stored in the meshes 12 and 13 is given to the working gas.
As a result, the temperature of the working gas rises.

When these working gases flow through the regenerator 10 for the Stirling engine, the working gases tend to be biased toward the center thereof. However, since the density of the disk-shaped mesh 13 is relatively high, the working gas The flow resistance increases, and the amount of working gas flowing through the mesh 13 becomes relatively small.
On the other hand, since the density of the ring-shaped mesh 12 is relatively low, the flow resistance of the working gas is low, and the amount of the working gas flowing through the mesh 13 is relatively large. As a result, the flow distribution of the working gas in the regenerator 10 for the Stirling engine is made substantially uniform regardless of the central portion and the outer peripheral portion. Further, since the wire diameter of the disk-shaped mesh 13 is relatively small, the thermal performance is improved.

[0017]

As described above, according to the present invention, a relatively high-density mesh is laminated at the center of the regenerator for a Stirling engine, and a relatively low-density mesh is laminated at the outer periphery thereof. Therefore, the flow rate distribution in the heat storage for the Stirling engine is made uniform, and all the stacked meshes generate the heat storage effect.

[Brief description of the drawings]

FIG. 1 is a sectional view of a regenerator for a Stirling engine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 shows a front view of the punch plate in FIG.

FIG. 4 shows a configuration diagram of a conventional heat storage device for a Stirling engine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat storage for Stirling engines, 11 Cylindrical housing, 12 Ring-shaped mesh, 13 Disk-shaped mesh.

Claims (1)

(57) [Claims] 1. A cylindrical housing, a relatively low-density ring-shaped mesh having the same outer diameter as the inner diameter of the cylindrical housing and laminated in the cylindrical housing, and an inner diameter of the ring-shaped mesh. A regenerator for a Stirling engine having a relatively high-density disk-shaped mesh having the same outer diameter and stacked in the cylindrical housing.