JPS6040764A - Two-cylinder stirling thermal machine with valve - Google Patents

Abstract

PURPOSE:To provide simpler configuration and higher efficiency for a stirling thermal machine which has two pistons reciprocating with a phase difference of approximately 90 deg. and has no displacer piston therein by disposing a valve mechanism in a gas passage which communicates the upper spaces of both cylinders with each other. CONSTITUTION:When the invention is embodied in a stirling refrigerator, the upper spaces 5 and 6 of pistons 3 and 4 which are housed in two cylinders 1 and 2 making an angle of 90 deg. with each other are connected with each other by a gas passage 7. A regenerated heat exchanger 8 and a water-cooling gas cooler 9 are disposed in the way of the gas passage 7. The passage 7 has a piston-like slide valve 15 dividing it into two passages 16 and 17. With the slide valve 15 at a lower position, the passages 16 and 17 are communicated with an external enclosed container 19 via a gas passage divided by a partition plate 18 and also communication pipes 20 and 21, respectively. Upon lifting the slide valve 15 by the force of a connecting rod 14, both the passages 16 and 17 are communicated with each other via a concentric flow passageway 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, there have been proposals for a displacer type Stirling thermomachine with a valve, but there have been no examples of it being applied to a two-cylinder type, which is usually called a rectangular type. In the first place, the 2-cylinder type has advantages over the displacer type, such as a simpler crank, better speed, and a lower machine height. By replacing the working gas with gas in a suitable external closed container or the atmosphere, a gas cooler or refrigerant cooler can be omitted, and a freezing room or gas cooler can be placed outside. An excellent Stirling thermomachine can be obtained by using a valve that provides a Stirling thermomachine with good filling efficiency.

The invention will be explained with reference to the figures. FIG. 1 is a front sectional view of an embodiment of a Stirling refrigerator according to the present invention. Second
The figure is a partial sectional view showing the xx' and yy' sections of the valve of FIG. 1. FIG. 6 is an explanatory diagram showing the operation of the embodiment shown in FIG. 1 divided into four parts.

1.2 is two cylinders at 90 degrees to each other.
Pistons 3 and 4 are housed inside. In the gas passage 7 between the upper spaces 5 and 6 of the piston 6.4,
A regenerative heat exchanger 8 and a water-cooled gas cooler 9 are provided in that order.

Note that 10 is the main crank, and 11 is the main crank pin.
, 12.13 are piston rods that drive the pistons 3 and 4.

Now, in the present invention, a piston-shaped slide valve 15 that is driven up and down by an auxiliary piston rod 14 provided on the main crank pin 1o is provided in the gas passage 7, and the gas passage 16 is
．． The slide valve 15 is divided into left and right sections by a partition plate 18 as shown in FIG. When the parts are in place, the passages 16,17 communicate with the connecting pipes 2[], 21 of the external closed container 19. In addition, the yy' cross section of the slide valve 15 is shown in the concentric passage 2 as shown in the figure.
2 are formed and their portions lie in the openings of the passages 16.17, the passages 16.17 communicate with each other.

Next, the present invention will be explained in detail with reference to FIG.

(1), (2), (3), and (4) in the same figure show the operation of the machine when the main crank pin passes through each of the 90-degree inlays (1), (2), i, and (4) shown in the diagram. It is an operation|movement explanatory diagram which shows a situation one by one. That is, in (1) inlay in the figure, the internal gas in the upper space 5 of the cylinder 1 is discharged into the external sealed container 19 by the action of the partition plate 18 of the slide valve 15, and the gas in the external sealed container 19 is discharged through the slide valve. 15 into the upper space 6 of the cylinder 2. Next, in the inlay (2), the gas in the upper space B is compressed, in the inlay (6), the gas in the upper space B is exchanged into the upper space 5, and in the inlay (4), the gas in the upper space 5 is Perform expansion work.

By carrying out such a cycle, the gas in the external sealed container 19 is heated through the regenerative heat exchanger 8, cooled by the cooler 9, and compressed while dissipating heat, and then passed through the regenerative heat exchanger 8 again. Since the expansion work is performed in the rear cylinder which is cooled by passing through the gas in the opposite direction, when the temperature efficiency of the regenerative heat exchanger is sufficiently high, the gas returning to the external sealed container 19 will be at a lower temperature than when it exits. Therefore, the external sealed container 19 becomes a freezing chamber.

Next, FIG. 4 is a front sectional view of an embodiment in which the present invention is applied to an internal combustion Stirling engine, and FIG. 5 is an explanatory view of the operation of the embodiment of FIG. 4.

Components numbered 1 through 17 in FIG. 4 are the same as those in the embodiment of FIG. However, in this embodiment, a fuel injection valve 22 and a spark plug 26 are provided in place of the cooler 90 in FIG. 1'. Further, the cylindrical slide valve 15 is provided with a concentric annular flow passage portion 24 and a portion having a flow passage 25 on only one side, and the flow passage 25 may communicate with an exhaust pipe 26. In addition, the slide valve 15 is connected to an auxiliary piston rod 2 provided on an auxiliary crank pin 27 at a position approximately 40 degrees behind the main crankbin 11 in phase.
8, and the main crank 10 rotates in the opposite direction to that of the refrigerator.

An air supply hole 29 for introducing new air and an auxiliary exhaust hole 30 are provided on the lower side of the housing cylinder 1, and the piston 1
The structure is such that air is supplied into the space 5 when the space 5 approaches the bottom dead center. The auxiliary exhaust hole 60 passes through the auxiliary exhaust pipe 31 and merges with the exhaust pipe 26. Further, 32 is a fresh air intake check valve which introduces atmospheric air into the crank chamber 66 and sends fresh air to the air supply hole 29 via the air supply pipe 34 by compressing the crank chamber.

Fresh air is introduced into the space 5 at the (1) inlay (1), the operation of which will be explained in FIG. 5, and a small amount of exhaust gas remaining inside is swept out. Further, the exhaust gas in the space B passes through the regenerative heat exchanger 8, passes through the passage 25 of the valve 15, and is discharged through the exhaust pipe 26. In the (2) inlay of (2), the fresh air in the space 5 is mainly compressed. Next, in the (6) inlay of (6), the compressed fresh air in the space 5 enters the space B via the regenerative heat exchanger 8, and combustion occurs at the same time.

In the fourth quadrant of (4), expansion work of the hot gas mainly occurs in space B. As mentioned above, after the fresh air is compressed, it passes through the regenerative heat exchanger 8 and generates expansion work, and the expanded exhaust gas passes through the regenerative heat exchanger in the reverse direction again and is discharged leaving heat behind. The heat regeneration cycle has been completed, and a significant improvement in thermal efficiency can therefore be expected. The filling efficiency when introducing fresh air is better than any other method using reeds or reeds. Although the embodiment shown in FIG. 4 is an internal combustion type, in order to form a conventional external combustion type Stirling engine, the cooler 90 shown in FIG.
The first one, with a gas heater placed on the side and the crank rotated in the opposite direction.
The shape shown in the figure may be used.

As described above, by providing the valve mechanism of the present invention to a two-cylinder one-type Stirling thermal machine, it is possible to place a direct cooling freezing chamber of any shape outside the refrigerator, and to The two-cylinder Stirling valve with valve has many advantages, such as high charging efficiency, and in the case of an external combustion engine, the gas cooler can be moved outside the conventional passage, reducing dead gas space and flow resistance. You can get a thermo machine.

Now, in the two-cylinder Stirling thermomachine with a valve of the present invention, any cylinder, crank, or piston can be freely selected, including the onion type, and the type, pressure, temperature range, etc. of the working gas, including the atmosphere, can be selected widely. In addition, the type, shape, quantity, etc. of the valves are free, including when using check valves.
Both are included in the present invention.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of an embodiment of the present invention applied to a Stirling refrigerator. Figure 2 shows the x of the valve in Figure 1.
FIG. 6 is a partial sectional view showing an x' section and a y y' section, and is an explanatory diagram illustrating the operation of the embodiment of FIG. 1 divided into four quadrants. FIG. 4 is a front sectional view of an embodiment of the present invention applied to an internal combustion Stirling engine. Further, FIG. 5 is an explanatory diagram illustrating the embodiment of FIG. 4 divided into four inlays. 1.2° cylinder, 6.4° piston. ) ) 5.6; Head space; 8; Regenerative heat exchanger. 9; Gas cooler, 15; Slide valve. 18; Partition plate; 19; External airtight container. 22; Fuel injection valve; 26; Exhaust pipe. 29; Air supply hole; 62; Check valve. ; p2B Procedural amendment October 1983 g Japan Patent Office Commissioner Kazuo Wakasugi 1, Indication of the case 1982 Patent Application No. 148762 2, Name of the invention 6, Person making the amendment Relationship between Patent applicant 4, date of amendment order Z Contents of amendment The application and specification are transcribed as attached (no change in content). Supplementary procedure, Original document (method) % formula % 1. Indication of the case 1982 Patent Application No. 148762 2. Name of the invention 6. Person making the amendment Relationship to the case Patent applicant 4. Date of the amendment order Showa November 8, 1958 5. Number of inventions increased by amendment 6. Subject of amendment

Claims (1)

[Claims] A cylinder with two cylinders each having one piston inside, the two pistons moving with a phase difference of about 90 degrees, and a cylinder without a displacer piston.
In a one-cylinder Stirling thermomachine, a suitable valve such as a slide valve or a rotary valve is provided in the gas passage passing through the upper space of the two cylinders, so that the point at which both pistons pass the bottom dead center is determined. During a crank angle period of about 100 to 150 degrees, the gas in the space above both pistons enters and leaves the external closed container or the atmosphere through completely different passages without contacting each other, and thus the working gas inside the thermomachine A two-cylinder Stirling thermal machine with a valve, in which the valve is configured so that most of the gas is replaced with the gas or atmosphere in an external closed container during each cycle.