JPS61247846A - Stirling engine - Google Patents

Abstract

PURPOSE:To obtain a miniaturized and highly efficient Stirling engine, by arranging five cylinders of the engine on one and the same circle line, and by arranging heat-exchanger units on another circle line at equal intervals with heating sections each forming an expansion space and a heater being mounted on pedestals through the intermediary of heat-insulating sections. CONSTITUTION:Five cylinders each having therein a piston 43 are arranged on one and the same circle line, and heat-exchanger units each including a heater 70c, a regenerator 60c and a cooler 50c are arranged on another one and the same circle line at equal intervals. Each piston 43 is driven by a swash plate 32 with a phase difference of 72 deg. between then in each adjacent cylinders. Heaters 70 and cylinder caps 42 are mounted on pedestals 90b, respectively through the intermediary of heat-insulating sections 91a.

Description

[Detailed description of the invention] (Industrial application field) The invention also relates to Stirling engines.

(Prior Art) Conventionally, as shown in the schematic diagram of FIG. 4, movable pistons 11 are housed in four piston cylinders 10, and each piston cylinder 10 is equipped with a heater 12, a regenerator 13, and a cooler. Each movable piston 11 is connected to a swinging swash plate 15 by a piston rod 16, and the piston rod 16 drives the swinging swash plate 15 to rotate the output shaft 17. A Stirling engine that allows this to occur is known.

(Problems to be Solved by the Invention) The conventional Stirling engine is composed of four cylinders, and each adjacent movable piston 11 has a phase difference of 90 degrees, but even this causes the torque of the output shaft 17 to vary. There were problems in that the fluctuations were large and smooth rotational motion could not be achieved, and the output was also small, making it impossible to obtain a high-speed, high-efficiency Stirling engine. Although such a Stirling engine is not shown,
Installation of the heater 12 and piston cylinder 10
It was very difficult to form a cold water flow part on the lower part (compression space) side of the heater 12, and furthermore, there was a problem that heat from the heating source of the heater 12 was conducted to the compression space, which was a so-called heat conduction loss. It also had points.

, (Object of the Invention) In view of the above-mentioned conventional problems, the present invention not only provides a small torque fluctuation, ′, but also high rotation and high efficiency.
It can be made compact, furthermore, it prevents heat from the heating part side from being conducted to the cooling part and compression space side, and furthermore,
The purpose is to provide a Stirling engine with easy installation of heating parts, etc.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes movable pistons 43a to 43e that are disposed on the same circumference in contact with each other or in close proximity to each other at equal intervals, and that accommodate movable pistons 43a to 43e, respectively. Five piston cylinders 4Qa to 40e each having an expansion space A at one end and a compression space B at the other end, and a heating section 70a that communicates in series with each of the piston cylinders 40a to 40e.
~70e1 Regeneration parts 60a to 60e and cooling parts 50a to 5
five heat exchangers 80a to 80e formed in parallel with the piston cylinders 408 to 40e, respectively, and each of the piston cylinders 40a to 40e and the multi-heat exchangers 808 to
A pedestal 9 attached to at least three stages that fixes the 80e.
0a to 90d, and the multi-heat exchangers 80a to 80e are disposed near the outside of each of the adjacent piston cylinders 40a to 40e and equidistant from each of the piston cylinders 40a to 40e, and Each of the ship heating parts 708 to 70e is fixed on the pedestal 90b on the expansion space A side, and a cooling tank 91C is formed between each pedestal 90C290d on the compression space B side. The pedestal 9 on the space A side
It is characterized in that heat insulating parts 91a and 91b are formed between 0a and 90b and the pedestal 90c on the compression space B side.

(Function) According to the present invention, five piston cylinders and five heat exchangers are provided, and further connected to the rocking swash plate via a connecting body,
Since it is a 5-cylinder Stirling engine, the phase difference between each movable piston can be set to 72 degrees, resulting in small torque fluctuations, high rotation speed, and high efficiency. Further, the piston cylinders are arranged on the same circumference in contact with each other or in close proximity at equal intervals, and each heat exchanger is arranged near the outside of each adjacent piston cylinder and equally spaced from each piston cylinder. Because they are located at a distance, each piston cylinder and the multi-heat exchanger can be arranged in a small space, providing a compact Stirling engine. Furthermore,
Each heating part only needs to be fixed on the pedestal on the expansion space side, making installation easy.

Furthermore, since a heat insulating section is formed between the pedestal on the expansion space side and the pedestal on the compression space side, the heat on the heating section side is shielded by the heat insulating section and the compression space side is heated. Never. Furthermore, the cooling tank can be easily formed by simply circulating cold water between the eight seats on the side of the compression space.

(Example) Figures 1 to 3 show an example of the present invention.
0 is the engine body, and 30 is the crank section. The engine main body 20 includes five piston cylinders 40a to 40a of the same shape.
40e, cooling parts 50a to 50e, and regeneration parts 60a to 60
five identical heat exchangers 80a to 80e consisting of heating parts 70a to 70e, and the piston cylinders 40a to 4
0e and pedestals 90a to 90d provided in four upper and lower stages for supporting and fixing the heat exchangers 808 to 80e.

The cylinder 40a is made up of a cylinder body 41a and a cylinder cap 42a, and a movable piston 43a is housed inside these, and an inert gas in the heating/cooling range such as N2, He, 82, etc. is sealed therein. As shown in the figure, the upper part has an expansion space 8A, and the lower part has a compression space B.
are formed respectively. In addition, each movable piston 43
a to 43e are adjacent movable pistons 43a to 43e;
They each have a phase difference of 72°.

Incidentally, the cylinders 40b to 40e are similarly constructed, and as shown in FIG. 2, the cylinders 408 to 40e are arranged in concentric contact with the pedestals 908 to 90d.

The heat exchanger 80c is provided with a cooling section 50c, a regeneration section 60c, and a heating section 70G in order from the bottom. Further, the regeneration unit 60c and the cooling unit 50c are provided vertically in the n100, and the cooling unit 50C is provided with a vertically elongated cold water container 51c, which includes a cold water supply vibe 52c and a cold water discharge pipe. Cold water is circulated through 53c, and a cold air circulation section 54C is provided outside of this. The regeneration section 60G is formed by laminating a plurality of porous materials such as wire mesh, and stores and releases the heat of the circulating gas. The heating section 70C is the regeneration section 60C.
The reproduction section 60 is disposed in the cylinder 101 at the top of the
A hot air container 71c is disposed inside the container 71G, and a hot air circulation portion 72c is formed outside the container 71G. In addition, other heat exchangers 80a, sob, 80d,
80e1. :":lNr is also configured in the same manner as the heat exchanger 80G, and as shown in FIG. 408 to 40e.Furthermore, a burner (not shown) is disposed above the heating parts 70a to 70e.
0e and the upper part of each of the cylinders 40a to 40e,
The circulating gas is heated.

Also, as shown in FIGS. 2 and 3, the cylinder 4
The expansion space A of the cylinder 40a and the hot air circulation section of the heating section 70a of the heat exchanger 80a are communicated via the hot air circulation pipe 110a, and the compression space B of the cylinder 40a and the heat exchanger 8
The cold air flow section of the cooling section 50e of 0e is the cold air flow passage 111.
It communicates via e. Similarly, the expansion space A of the cylinder 40b and the hot air circulation section of the heating section 70b, the compression space B of the cylinder 40b and the cold air circulation section of the cooling section 50a, the expansion space A of the cylinder 40c and the heating section 70c. The hot air circulation section 72c, the compression space B of the cylinder 40C, the cold air circulation section of the cooling section 50b, the expansion space A of the cylinder 40d, the hot air circulation section of the heating 170d, and the cylinder 40.
d compression space B and the cold air circulation section 54C1 of the cooling section 50c.
The expansion space A of the cylinder 408, the hot air circulation part of the heating section 70e, the compression space B of the cylinder 40e, and the cooling section 50
d and the hot air circulation section 110b, respectively.
110e and cold air flow passages 111b to 111e, respectively.

The pedestal 90a is connected to the heating section 70 as shown in FIG.
a, 70C and the cylinders 428.42C are held and fixed, and the pedestal 90b is attached to the cylinder bodies 41a, 41C.
The pedestal 90c holds and fixes the upper part of the cylinder body 418.4, and the pedestal 90c holds and fixes the approximate center of the cylinder bodies 41a, 41C and the upper part of the cylinder 100.
The lower end of the IC and the lower end of the tube 100 are supported and fixed. Further, a heat insulating material 91 is provided between the pedestal 90a and the pedestal 90b.
a, and a heat insulating material 9 is provided between the pedestal 90b and the pedestal 90G.
1b, respectively. Further, a cooling tank 91G in which cold water circulates is provided between the pedestal 90C and the pedestal 90d, and the cylinder 42a.

Compression space B of 42C and cooling section 50C are cooled.

Although not shown, the pedestals 908 to 90d are fixed to the cylinders 40b and 40d to 40e in a similar manner.

Inside the crank portion 30 are a guide piston 31, a swinging swash plate 32, a support rod 33 that is in spherical contact with the center of the swing swash plate 32, and an output shaft 34 fixed at the center of the swing swash plate 32. Although not all of the guide piston 31 is shown,
Five pistons are provided, each of which is connected by an O-rad 44 fixed to the lower end of the movable pistons 438 to 43e. Further, each indoor piston 31 and the swinging swash plate 32 are freely connected at both ends by a rod 35 which is in spherical contact with them, and the movable pistons 43a to 43e are connected to each other by the rod 35, 44 and each indoor piston 31. The output shaft 34 constitutes a connecting body of the swinging swash plate 32, and the output shaft 34 is rotated via the swing swash plate 32 by the vertical movement of the movable pistons 43a to 43e.

Since the Stirling engine according to the present invention is configured as described above, the gas sealed in the cylinders 408 to 40e is passed through the heat exchanger 80a through the hot air circulation vibes 110a to 110e and the cold air flow passages 111a to 111e, respectively.
~80e, each adjacent movable piston 408~40
Since it is a 5-cylinder engine that repeats expansion and compression with a phase difference of 72 degrees, torque fluctuations are small, and
The output shaft 34 can be made to have high rotation speed and high efficiency.

Further, the cylinders 40a to 40e are arranged in concentric contact with the pedestals 90a to 90d, and the heat exchangers 80a to 80e are arranged in contact with the adjacent cylinders 40a to 40a.
0e, and each of the cylinders 40a to 40
Since the cylinders 40a to 40e and the heat exchangers 80a to 80e are arranged at positions equidistant from the engine e, the cylinders 40a to 40e and the heat exchangers 80a to 80e are arranged compactly, and the entire engine becomes smaller.

Further, each cylinder 40a to 40e and each heat exchanger 80a to
Since the 80e are each formed in the same shape, parts can be made common, and the manufacturing cost can be reduced.

Furthermore, since the heating parts 70a to 70e can be installed upright on the pedestal 90b, the installation of the heating parts 70a to 7Qe is very simple.

Furthermore, the heating parts 70a to 70e and each cylinder 40
The expansion space A of a to 40e is heated by a burner,
A heat insulating material 91a is provided between the pedestal 90a and the pedestal 90b.
In addition, a heat insulating material 91b is provided between the pedestal 90b and the pedestal 90C.
Since the heat exchangers 80a to 80e and each cylinder 4
The compression space B of 08 to 40e and the cooling tank 91c are not heated by the heat, and can efficiently cool and compress the circulating gas.

Furthermore, since the cooling tank 91G is formed by circulating cold water between the pedestal 90c and the pedestal 90d, it can be easily formed.

In the above embodiment, the piston cylinders 40a to 40e are arranged in contact with each other, but the cylinders 40a to 40e may be arranged close to each other at equal intervals.

(Effects of the Invention) As explained above, the present invention provides pistons that are disposed on the same circumference in contact with each other or in close proximity to each other at equal intervals, each housing a movable piston, and an expansion space at one end and a compression space at the other end. five piston cylinders each forming a space; five heat exchangers each forming a heating section, a regeneration section, and a cooling section in series communication with each of the piston cylinders in line with the piston cylinder; A piston cylinder and a pedestal attached to at least three stages for fixing the multi-heat exchanger are provided, and the multi-heat exchanger is located near the outside of each of the adjacent piston cylinders and at an equal distance from each of the piston cylinders. At the same time, the 8 heating parts are fixed on the pedestal on the expansion space side, a cooling tank is formed between the pedestals on the compression space side, and Since a heat insulating section is formed between the pedestal and the pedestal on the compression space side, a 5-cylinder Starlinda engine is formed, and the phase difference between each movable piston can be set to 72", reducing torque fluctuation. It has the advantage of being small, high rotation speed, and high efficiency.Furthermore, each piston cylinder is arranged on the same circumference in contact with each other or close to each other at equal intervals, and each heat exchanger Near the outside of each adjacent piston cylinder,
In addition, since the piston cylinders and the multi-heat exchanger are arranged at equal distances from each piston cylinder, the piston cylinders and the multi-heat exchanger can be arranged in a small space, which has the advantage that a compact Stirling engine can be provided. Furthermore, since each heating section only needs to be fixed on the pedestal on the expansion space side, there is an advantage that installation is simple. Furthermore, since a heat insulating section is formed between the pedestal on the expansion space side and the pedestal on the compression space side, the heat on the heating section side is shielded by the heat insulating section and the compression space and cooling tank are cooled. The gas flowing inside the engine can be efficiently cooled and compressed without being heated.

Furthermore, the cooling tank has the advantage that it can be easily formed by simply circulating cold water between the pedestals on the side of the compression space.

[Brief explanation of the drawing]

The drawings are for explaining the present invention, and FIGS. 1 to 3 show a Stirling engine according to the present invention, and FIG. is a plan view,
FIG. 3 is a process diagram showing the operation, and FIG. 4 is a schematic diagram showing a conventional Stirling engine. In the figure, 408 to 40e... piston cylinder, 43a
~43e...9 moving piston, 50a~50e...cooling part, 60a~60e...regeneration part, 70a~70e・
...Heating section, 80a-80e...Heat exchanger, 90a'
~90d...Pedestal, 91a, 91b-...Insulation section, 91G...Cooling tank, A...Expansion space, B...Compression space.

Claims (1)

[Claims] Five piston cylinders arranged on the same circumference in contact with each other or close to each other at equal intervals, each housing a movable piston, and each having an expansion space at one end and a compression space at the other end; five heat exchangers, each of which has a heating section, a regeneration section, and a cooling section that communicate in series with the piston cylinder, each of which is formed side by side with the piston cylinder; and at least three heat exchangers that fix each of the piston cylinders and each of the heat exchangers. each heat exchanger is disposed near the outside of each adjacent piston cylinder and equidistant from each piston cylinder, and is provided with a pedestal attached to the expansion space side. Each heating section is fixed on the pedestal, and
A cooling tank is formed between each of the pedestals on the compression space side, and further,
A Stirling engine characterized in that a heat insulating section is formed between the pedestal on the expansion space side and the pedestal on the compression space side.