JPS61247848A - Stirling engine - Google Patents

Abstract

PURPOSE:To obtain an engine which has a low possibility of damage and gas leakage, by forming a hollow space in a pedestal constituting an engine frame, to obtain a passage between a chamber in the lower section of each cylinder and a chamber in a heat-exchanger adjacent to the former. CONSTITUTION:A heat-exchanger unit composed of a heater 43, a regenerator 42 and a cooler 41 is arranged adjacent to a cylinder 30 including a piston 20, and a heating section A in the cylinder is connected with the heater 43 through a pipe line 61 while a cooling space B in the cylinder is communicated with a cooler 41 in another heat-exchanger unit through a passage 60 which is formed, by a machining process, in a pedestal 12 constituting an engine frame. With this arrangement pipe lines on the cooler side may be eliminated, thereby it is possible to reduce the possibility of damage.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a Stirling engine.

(Prior Art) Conventionally, in a Stirling engine, the compression space of a piston cylinder and the cooling part of a heat exchanger are connected by a plurality of working gas distribution vibes, and the air inside the piston cylinder is connected via a plurality of working gas circulation vibes. A device that allows working gas to flow is known.

(Problems to be Solved by the Invention) As described above, in the conventional Stirling engine, the compression space and the cooling section are connected by a plurality of working gas circulation vibrators, so it is necessary to connect the working gas circulation vibrators to each other. This made the assembly of the Stirling engine extremely complicated, and there was also the risk of gas leaking from the connecting part of the working gas distribution vibrator due to the shooting, impulse, etc. generated by driving the Stirling engine. Ta.

(Object of the Invention) In view of the above-mentioned conventional problems, an object of the present invention is to provide a Stirling engine in which a working gas passage can be easily formed and which does not cause gas leakage. Means for Solving the Problems) In order to achieve the above object, the present invention includes a plurality of piston cylinders 20 each housing a town motion piston 30, and a cooling section 41 communicating with the compression space B of the piston cylinders 20.
In the Stirling engine equipped with a heat exchanger 40 having the piston cylinder 20 and the heat exchanger 4,
0 is provided on one side of the thickly formed pedestal 12, and
A working gas passage 60 is provided in the pedestal 12, which communicates the cooling section 41 of the heat exchanger 40 with the compressed air 1i51B of the piston cylinder 20.

(Function) According to the present invention, the piston cylinder and the heat exchanger are provided on one side of the pedestal, and within the pedestal are the cooling part of the heat exchanger and the compression space of the piston cylinder. Since a working gas passage is provided that communicates with As long as it is not damaged, the working gas passage will function normally and no gas leaks will occur.

(Example) Figures 1 and 2 show an example of the present invention, and Figure 1 shows a part of a multi-cylinder Stirling engine. pedestal, 20 is the pedestal 1
A plurality of piston cylinders erected in contact with the same circumference on 2, 30 a vertically elongated movable piston housed in the piston cylinder 20, 40 provided on the pedestals 10 to 12, and It is a heat exchanger located on the same circumference on the outside.

The pedestals 10, 11, and 12 are arranged in three stages in the vertical direction, and a heat insulating material 1 is provided between the upper pedestal 10 and the intermediate pedestal 11.
A cooling tank 14 in which cold water circulates is provided between the pedestal 11 and the lower pedestal 12. In addition, the pedestal 10
．． 11.12 have small diameter through holes 10a, 11a, 12a.
A large diameter through hole 1 is provided between the through holes 1oa and ia.
0b.

A plurality of recesses 12t) are formed to face each other in the vertical direction, and are opposed to the through holes 10b and 11b, and on the upper surface of the thickly formed pedestal 12 are recesses 12t) whose diameter increases upwardly. is forming.

The piston cylinder 20 consists of a cylinder body 21 and a cylinder cap 22, and the lower end of the cylinder and body 21 is erected in the recess 12b, and the pedestal 10
．． The cylinder cap 22 extends through the through holes 10b and 11b of the pedestal 10, and is erected on the through hole 10b of the base 10. Further, an inert working gas such as N He or H2 is sealed inside the cylinder 20, and an expansion space A is formed in the upper part, and a compression space B is formed between the lower part and the recess 12b. There is.

The heat exchanger 40 includes a cooling section 41 and a regeneration section 42 in order from the bottom.
and a heating section 43. The regeneration unit 42 and the cooling unit 41 are provided above and below within a cylinder 44 whose lower end is open (ljf1 opening 44a), and the cooling unit 41 has a vertically elongated cold water container 45 disposed therein. is cold water supply vibe 46a
Cold water is circulated by the cold water discharge pipe 46b, and
A cold air circulation section 47 is provided on the outside. The reproduction section 4
2 is made up of a plurality of layers of wire mesh, and stores and releases the heat of the circulating gas. The heating section 43 has an open bottom end (opening 4
8a) disposed within the cylinder 48, and the regeneration portion 42
A hot air container 49 is disposed inside the container 49, and a hot air circulation section 50 is formed outside the container 49.

Further, as shown in FIG. 2, the pedestal 12 is provided with a plurality of working gas passages 60, each of which communicates the compression space B above each recess 12b with the cold air circulation section 47 of each cooling section 41. are doing. Further, as shown in FIG. 1, the expansion air NA in each cylinder cap 22 and the hot air circulation section 50 of each heating section 43 are connected by each connecting vibro 1. This allows one cylinder 20
The working gas in the compression space B of the cylinder 20 flows into the expansion space A of the other cylinder 20 via the heat exchanger 40.

Incidentally, a piston rod 31 is connected to the lower end of the movable piston 30, and although not shown, is connected to a rocking swash plate or the like, and applies rotational force to an output shaft connected to the rocking swash plate or the like.

Since the Stirling engine according to the present invention is configured as α above, the working gas in the compression space B of the cylinder 20 flows into the expansion space A of the other cylinder 20 via the heat exchanger 40, and compression of the working gas in 20;
Cooling is repeated to move the movable piston 30 up and down, and further rotate the output shaft.

Further, since the working gas passage 60 is provided within the pedestal 12, boring is performed from the circumferential side of the pedestal 12, and
A blind screw 62 can be easily screwed into the opening on the circumferential side, and even if shock and vibration are applied due to engine driving, the operation will continue as long as the thick-walled pedestal 12 is not damaged. The gas passage 60 functions normally and does not cause gas leakage or the like.

(Effects of the Invention) As described above, in a Stirling engine including a plurality of piston cylinders each housing a movable piston, and a heat exchanger having a cooling section communicating with a compression space of the piston cylinder, the piston cylinder and the heat exchanger are provided on one side of a thick-walled pedestal,
Moreover, since a working gas passage is provided in the pedestal to communicate the cooling part of the heat exchanger and the compression space of the piston cylinder, the working gas passage can be easily formed by boring the pedestal or the like. Furthermore, even if shocks and vibrations are applied due to engine driving, the connecting parts between the plurality of working gas distribution vibes and the cooling section will not be damaged as in the past, and the pedestal will not be damaged. The working gas passage has the advantage that it functions normally and gas leakage does not occur as long as this is not the case.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS.
The figure shows a Stirling engine according to the present invention, with the first
The figure is a partially omitted sectional view, and FIG. 2 is a plan view of the pedestal. In the figure, 12... pedestal, 20... piston cylinder,
30... Movable piston, 40... Heat exchanger, 41.
...Cooling section, 42...Regeneration section, 43...Heating section, B
...Compressed space & CO-deprivation @force w4m-. 1st rl! J M1 Figure 2

Claims (1)

[Claims] In a Stirling engine comprising a plurality of piston cylinders each housing a movable piston, and a heat exchanger having a cooling section communicating with a compression space of the piston cylinder, the piston cylinder and the heat exchanger are thick-walled. A Stirling engine, characterized in that a working gas passage is provided on one side of the formed pedestal, and in the pedestal is provided a working gas passage that communicates the cooling part of the heat exchanger and the compression space of the piston cylinder. .