JPH07324652A - Regenerator for stirling engine - Google Patents

Abstract

PURPOSE:To reduce side leak of operation medium and prevent reduction of engine efficiency by forming the regenerator of a stirling engine used in air- conditioning, hot water supply, power and the like by providing a recessed and projection parts on the inner wall of the regenerator case of a side which is brought in contact with a regenerator filling material. CONSTITUTION:In a cylinder type stirling engine, an expansion side cylinder 1 and a compressed side cylinder 9 are provided in a housing H, pistons 3, 5 are housed therein, and a heat sink 23, a regenerator 25, and a radiator 27 are provided between expansion space 19 and compressed space 21. The regenerator 25 is formed in such constitution that a plurality of wire gauges are laminated, they are dispersed and joined with each other, a sintered material which is formed in a ring shape and a cylindrical shape is filled, it is mounted in a case 25b. In this case, a recessed and projection part 25c is provided on the inner wall of a side which is brought in contact with the filling material 25a of the case 25b. It is thus possible to be generated labyrinth effect, and reduce side leak of operation medium which is generated between a filling material and case.

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 used for cooling and heating, hot water supply, power, etc., and particularly, by improving the configuration of the regenerator, side leak in the regenerator is reduced. It has been devised to improve efficiency.

[0002]

2. Description of the Related Art Conventionally, as a regenerator for a Stirling engine, as shown in FIG. 4, for example, a regenerator configured to fill a regenerator case with a regenerator case and to incorporate the regenerator case into a housing is known. is there. In the case shown in FIG. 4, the regenerator 71 is configured by laminating a plurality of regenerator fillers 71a made of a wire mesh as a disc-shaped heat storage body inside the regenerator case 71b.

[0003]

However, the above-mentioned conventional regenerator for the Stirling engine has the following problems. First, in the case of a configuration in which a regenerator filling material composed of a wire mesh as a heat storage body is filled in a metal regenerator case and incorporated into the housing, there is a side leak in the regenerator. Since the function of the regenerator in the part is impaired, the efficiency of the engine is reduced.

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem, and in order to prevent deterioration of engine efficiency, a housing and a working medium installed in the housing are enclosed. A cylinder, two pistons that are movably installed in the cylinder and partition the inside of the cylinder into an expansion space and a compression space, and a heat absorber and a regenerator installed between the expansion space and the compression space. And a radiator, wherein the regenerator is intended to provide a regenerator for a Stirling engine in which unevenness is provided on the inner wall of the regenerator case on the side in contact with the regenerator filler. is there.

[0005]

In the regenerator of the Stirling engine according to the present invention, the labyrinth effect is generated by providing the inner wall of the regenerator case on the side in contact with the regenerator filler with the outer side of the regenerator filler and the regenerator filler. The engine efficiency is improved by preventing the side leak of the working medium generated in the gap between the inner wall of the regenerator case on the side in contact with the material and thereby preventing the heat regeneration efficiency from decreasing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a regenerator for a Stirling engine according to the present invention will be described below with reference to FIGS.
FIG. 1 shows the overall construction of an embodiment of a two-cylinder type Stirling engine to which a regenerator according to the present invention is applied.
In FIG. 1, an expansion side cylinder 1 and a compression side cylinder 9 are provided in a housing H, and an expansion side piston 3 and a compression side piston 5 are housed and arranged in the cylinders 1 and 9, respectively. The expansion-side piston 3 slides in the expansion-side cylinder 1 in the vertical direction in the drawing, and the compression-side piston 5 slides in the compression-side cylinder 9 in the horizontal direction in the drawing. A working medium is enclosed in the expansion side cylinder 1 and the compression side cylinder 9. The expansion side piston 3 is an expansion side cross guide 11
The compression side piston 5 is connected to the compression side cross guide 13. And cross guide 1
Reference numerals 1 and 13 are connected to a crank mechanism 15. Reference numeral 17 is a rotating shaft. 19 is an expansion space (cooling), 21 is a compression space (heat dissipation), and a heat absorber 23, a regenerator 25, and a radiator 27 are installed between the expansion space 19 and the compression space 21. 29 is a buffer chamber. The heat absorber 23 uses, for example, a multi-tube type tube. FIG. 2 shows the overall construction of an embodiment of a one-cylinder type Stirling engine to which the regenerator according to the present invention is applied. In FIG.
31 is a housing, 33 is a displacer piston, 3
5 is a cylinder, 37 is a power piston, 39 is a machine room,
41 is an expansion space, 43 is a compression space, 45 is a heat absorber, 47
Is a regenerator, 49 is a radiator, and 51 is a buffer chamber. That is, in the Stirling engine shown in FIG. 2, the displacer piston 33 and the power piston 37 are housed in the cylinder 35, and the expansion space 41 and the compression space 43 are defined. In the machine room 39 below the cylinder 35, the displacer piston 33 and the power piston 3
The reciprocating motion of 7 is converted into a rotary motion. Further, a regenerator 47 is arranged between the heat absorber 45 communicating with the expansion space 41 and the radiator 49 communicating with the compression space 43.

By the way, the regenerator 25 of the two-cylinder type Stirling engine shown in FIG. 1 and the regenerator 47 of the one-cylinder type Stirling engine shown in FIG.
The configuration is as shown in (b). That is, the regenerator 2
5, 47 are regenerator fillers 25a, 4 which are, for example, ring-shaped or cylindrical sintered products obtained by stacking a plurality of wire mesh bodies as heat storage bodies and diffusion-bonding the wire mesh bodies.
7a and insert it into the regenerator cases 25b and 47b. The regenerator cases 25b and 47b are the regenerator cases 25b and 47b on the side in contact with the regenerator fillers 25a and 47a.
It is assumed that the inner wall of 7b is provided with irregularities 25c and 47c.
With this configuration, a labyrinth effect is generated, and side leak of the working medium generated between the outside of the regenerator fillers 25a and 47a and the inner walls of the regenerator cases 25b and 47b is reduced, thereby reducing the engine. It is possible to prevent a decrease in efficiency.

[0008]

As described above, the regenerator of the Stirling engine according to the present invention has a labyrinth effect by providing irregularities on the inner wall of the regenerator case on the side in contact with the regenerator filler, as described above. It has an excellent effect that side leak of the working medium between the regenerator case and the regenerator case can be reduced, and a decrease in engine efficiency can be prevented.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a two-cylinder type Stirling engine in which a regenerator according to the present invention is incorporated.

FIG. 2 is an overall configuration diagram of an embodiment of a one-cylinder type Stirling engine in which a regenerator according to the present invention is incorporated.

3 (a) and 3 (b) are vertical front views of an embodiment of a regenerator incorporated in the Stirling engine of FIG. 1 or FIG. 2, respectively.

FIG. 4 is a perspective sectional view of a conventional example of a regenerator incorporated in the Stirling engine of FIG. 1 or 2.

[Explanation of symbols]

 H: housing 1: expansion side cylinder 3: expansion side piston 5: compression side piston 9: compression side cylinder 19: expansion space 21: compression space 23: heat absorber 25: regenerator 27: radiator 31: housing 33: displacer piston 35: cylinder 41: expansion space 43: compression space 45: heat absorber 47: regenerator 49: radiator 25a, 47a: regenerator filler 25b, 47b: regenerator case 25c, 47c: unevenness

Claims (1)

[Claims] 1. A housing, a cylinder installed in the housing and containing a working medium, and two pistons movably installed in the cylinder to divide the cylinder into an expansion space and a compression space. In a Stirling engine comprising a heat absorber, a regenerator, and a radiator installed between the expansion space and the compression space, the regenerator is an inner wall of a regenerator case on a side in contact with a regenerator filler. A regenerator for a Stirling engine, characterized in that irregularities are provided on the regenerator.