JPH0111967Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a heater pipe for a Stirling engine, and more specifically, to a heater pipe for a Stirling engine equipped with fins.

(Prior Art) In the heater pipe of a conventional Stirling engine, fin plates 14' are joined to the surfaces of a plurality of pipes 4' located on the outer circumferential side at predetermined intervals in the vertical direction (see Fig. 6). ), fin plates 14'' were joined to the surface of each pipe 4'' located on the outer peripheral side at predetermined intervals in the vertical direction (FIG. 7).

(Problem to be solved by the invention) However, although each pipe 4' (pipe 4'') is designed to be located on the same circumference, due to manufacturing tolerances and other reasons, they may vary. Therefore, the fin plate 14'
When joining the fin plate 14'' to the pipe 4', use a special jig to connect the fin plate 14'' to the pipe 4'.
had to be positioned relative to the pipe 4' (pipe 4''), which was a real hassle.

Therefore, the technical problem of the present invention is to prevent such problems from occurring.

[Structure of the idea]

(Means for Solving the Problems) The technical means taken in the present invention to solve the above-mentioned problems are as follows: ``A plurality of nozzles extending upward from the cylinder head side manifold and disposed on the circumference. 1 pipe,
a plurality of second pipes extending upward from the heat storage side manifold and disposed in a circumferential manner so as to be located outside the first pipe; an upper end portion of each of the first pipes and a second pipe; an intermediate manifold connecting the upper end portion, a plurality of fin plates having a circular arc shape and having a predetermined number of holes into which the second pipes are loosely fitted; and an intermediate manifold interposed between the vertically adjacent fin plates. and an intermediate member having holes into which the second pipes are tightly fitted.

(Function) In this configuration, when attaching the fin plate to the predetermined number of second pipes, it is sufficient to simply insert the corresponding second pipe into each hole of the fin plate, and no special jig is required. Therefore, since a gap is formed between each hole of the fin plate and each corresponding second pipe, each second pipe
Variations in the arrangement between the pipes are absorbed by this gap, and the fin plate can be easily attached to a predetermined number of second pipes.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

The dual type Stirling engine 1 is the first
As shown in the figure, it is equipped with four cylinders 2 (2
Only the book is shown; the other two books are omitted). A working piston 8 is reciprocatably mounted inside the cylinder 2, and an expansion chamber 3 and a compression chamber 7 are defined above and below the working piston 8, respectively. The expansion chamber 3 is connected to the compression chamber 7 of the adjacent cylinder via a manifold 9, a plurality of heater pipes 4, a manifold 10, a heat storage device 5, and a cooler 6.
It is familiar to As is well known, the Stirling engine 1 reciprocates a working gas (helium gas, hydrogen gas, etc.) between an expansion chamber 3, which is a high-temperature part, and a compression chamber 7, which is a low-temperature part, and causes a working piston 8 to reciprocate. It's becoming like that.

The heater pipe 4 interposed between the manifold 9 on the side of the cylinder 2 and the manifold 10 on the side of the heat storage device 5 extends upward from the manifold 9 on the side of the cylinder 2 and is connected to a first pipe arranged circumferentially. pipe 11
and a second pipe 12 extending upward from the manifold 10 on the side of the heat storage device 5 and disposed in a circumferential manner. The first pipe 11 is located further inward than the second pipe 12, and the upper end of the first pipe 11 and the upper end of the second pipe 12 are connected by an intermediate manifold 13.

The heater pipes 4 are divided into four groups in the circumferential direction, and the heater pipes 4 belonging to each group are
As shown in FIGS. 4 and 5, the fin plate 14 has a plurality of fin plates 14 spaced apart from each other in the vertical direction with an intermediate member 22 in between. These fin plates 14 have a shape that surrounds the entire circumference of the heater pipe 4 when viewed as a whole.

As shown in FIG. 2, the fin plate 14 has an arcuate shape, and holes 20 are bored or punched through it in the vertical direction, and the diameter of each hole 20 is equal to the diameter of the corresponding second pipe 12. It is slightly larger than . This means that even if the second pipes 12 are not located on the same circumference, all the second pipes 1
2 can be inserted into the corresponding holes 20. The intermediate member 22 interposed between the fin plates 14 has an angular shape as shown in FIG. 3, and has a hole 23 through which the second pipe 12 is tightly fitted. The upper and lower surfaces of the intermediate member 22 are coated with a brazing agent.

As shown in FIGS. 4 and 5, the fin plate 14 and the intermediate member 22 can be assembled without any special jig.
are alternately combined on the second pipe 12 and then subjected to a brazing process in that state, thereby brazing the fin plate 14 and the intermediate member 22. At the same time, the brazing agent also penetrates between the hole 23 of the intermediate member 22 and the outer peripheral surface of the second pipe 12, and both of them are brazed.

[Effect of idea]

As described above, in the present invention, holes are formed in the fin plate through which the second pipes are inserted, so when attaching the fin plate to a predetermined number of second pipes, a hole is formed in the fin plate corresponding to each hole in the fin plate. It is enough to insert two pipes, and no special jig is required. Moreover, since a gap is formed between each hole of the fin plate and each corresponding second pipe, variations in the arrangement between the second pipes are absorbed by this gap, and the fin plate can be easily attached to a predetermined number of second pipes.

In addition, by appropriately adjusting the thickness of the intermediate member, the number of fin plates installed in a limited space can be adjusted according to the rating of the Stirling engine.
It can be increased or decreased.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the combustor part of a Stirling engine, Fig. 2 is a perspective view of the fin plate, Fig. 3 is a perspective view of the intermediate member, and Fig. 4 is a cross-section showing the attachment state of the fin plate according to the present invention. 5 are perspective views showing how the fin plate according to the present invention is attached, and FIGS. 6 and 7 are perspective views showing how the conventional fin plate is attached. 1: Stirling engine, 2: cylinder, 3: expansion chamber, 4: heater pipe, 5: heat storage device, 6: cooler, 7: compression chamber, 9, 10: manifold, 1
1: first pipe, 12: second pipe, 13: intermediate manifold, 14: fin plate, 20: hole in fin plate, 22: intermediate member, 23: hole in intermediate member.

Claims (1)

[Scope of utility model registration request] a plurality of first pipes extending upward from the cylinder head side manifold and arranged in a circumferential manner; A plurality of second pipes arranged, an intermediate manifold connecting the upper end of each of the first pipes and the upper end of each of the second pipes, and a hole having an arc shape and into which each of the second pipes is loosely fitted. A Stirling engine comprising: a plurality of fin plates in which a predetermined number of fin plates are bored; and an intermediate member in which holes are bored, the holes being interposed between the vertically adjacent fin plates and into which the second pipes are tightly fitted. heater pipe.