JPH1089148A - Triple speed displacer-type rotary stirling engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-weight and compact Stirling engine in which a rotary discplacer and a rotary engine are combined, to reduce the flow resistance of the working medium, and to improve the performance of the regenerative heat exchangers. SOLUTION: A rotary displacer 5 in a block case 1 is rotated at a speed triple times as high as one rotation of a rotor 6. One of the volume chambers 15 of the rotor is located at a position of the start of expansion, when a volume chamber 14 of the displacer is located at a position of a heating capillary 10, and the rotor is rotated by the thermally expanded working medium. The working medium after the expansion, is extruded to the capillary penetrated through a water cooling jacket 12, contracted by low pressure, and flown into the volume chamber one chamber before. The working medium is compressed, and discharged to the volume chamber of the displacer. Two regenerative heat exchangers are installed, that is, one is only for heat reserve, and other other is only for radiation of heat. The displacer acts as a flywheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can be changed to a conventional internal combustion or external combustion engine by putting a Stirling engine into practical use. Further, it is effective as a refrigerator that does not use Freon gas by using the characteristics of the reversible cycle.

[0002]

FIG. 6 is a sectional view of a conventional displacer type Stirling engine. The displacer 5a and the power piston 6a are respectively connected to the crankshaft 13a by piston rods 16 and 17 and connecting rods 18 and 19 at a phase angle of 65 ° to 90 °. There is a gap between the displacer 5a and the cylinder 4a in which the working gas moves.

When the displacer 5a starts moving from the top dead center to the bottom dead center, the working gas starts moving from the compression chamber 15a to the expansion chamber 14a, and is heated in the combustion chamber 10a to expand the expansion chamber 14a. Working gas begins to expand. At this time, the power piston 6a is near the top dead center, and the pressure of the working gas becomes high, causing the power piston 6a to work.

When the displacer 5a starts moving from the bottom dead center to the top dead center, the working gas in the expansion chamber 14a becomes 15a.
To the compression chamber. 6a power piston at this time,
Near the bottom dead center, the working gas in the compression chamber is cooled to a low pressure by the cooling fin 12a.

A continuous rotation is generated by the work of the power piston 6a and the inertia force of the flywheel 13a and the crankshaft 13a.

[0006]

A conventional Stirling engine using a crank is excessively heavy. Leakage of working gas from the piston ring and rod seal into the crankcase. Due to the low performance of the regenerative heat exchanger, etc., it has not reached the theoretically high efficiency engine.

[0007]

Means for Solving the Problems According to the present invention, the weight is reduced by combining a rotary displacer and a rotary engine, and the use of a linear apex seal makes it easy to prevent leakage of working gas. is there. In the present invention, since the working gas moves in one direction without reciprocating movement, the performance of the regenerative heat exchanger can be improved simply by storing heat.

[0008]

According to the present invention, a rotary engine block case is formed into a cylindrical shape, and a rotary displacer is rotated at a triple speed outside the block case.
This is to generate power by generating and contracting the working gas three times within one rotation of the rotor of the rotary engine.

[0009]

Embodiment An embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. Reference numeral 1 denotes a block case that incorporates five rotary displacers integrated with a rotary engine block. 2 is the heated working gas,
A regenerative heat exchanger is built in the passage leading to the expansion chamber of the rotary engine. Reference numeral 3 denotes a thin tube through which the working gas discharged from the expansion chamber communicates with the compression chamber, and is cooled by 12 water-cooling jackets. 4 is a rotor housing. 6 is a rotor.
Reference numeral 7 denotes a heat transfer wire for transmitting heat from the regenerative heat exchanger to the passage of the working gas sent from the compression chamber of 8 to the heating chamber. 9 is an apex seal attached to the rotary engine block and the rotary displacer so that the pressure of the working gas in the clearance is variable. 10 is a heating thin tube.
11 is the apex seal of the rotor. 13 is a rotation axis.

Next, the operation will be described with reference to FIG. Rotary displacer 5 and rotor 6 rotate clockwise. The rotary displacer 5 rotates three times when the rotor 6 rotates once. Rotor 6 advances 120 degrees when rotary displacer 5 rotates once. Therefore, 5 rotary displacers are 1
When rotating, the volume chamber 15a changes in volume from the end of the compression of the working gas to the end of the expansion. The volume of the volume chamber 15b changes from the start of the discharge of the working gas to the start of the reception of the working gas flowing through the thin tube 3. The volume chamber of 15c is 3
Of the working gas cooled by the 12 water-cooling jackets, the volume of the working gas changes from the middle of receiving the working gas to the middle of compression and discharge.

In FIG. 5, 14 volume chambers of the rotary displacer 5 are located at the discharge passage 8 for the working gas, and receive the low-pressure working gas from the volume chamber 15 c while being compressed. The regenerative heat exchanger transmitted from the regenerative heat exchanger channel by the heat transfer line is built in the discharge passage of 8, and the low-pressure working gas flows while receiving heat.

In FIG. 5, 14 volume chambers of the rotary displacer of 5 are located at positions connecting 10 heating thin tubes and 2 passages inside the regenerative heat exchanger, and the working gas of 14 volume chambers is 10 heating chambers. It is heated and expanded by the thin tube, flows through the passage while applying heat to the second regenerative heat exchanger, and expands the volume chamber 15a.

In FIG. 5, the working gas in the volume chamber 15b flows through the small tube 3 and moves to the volume chamber 15c. The working gas is cooled and contracted at a low pressure because the capillary of No. 3 passes through the inside of the water cooling jacket of No. 12.

The rotary displacer 5 also has the function of a flywheel. The above continuous operation generates rotational power.

[0015]

According to the present invention, a Stirling engine is devised as a rotary engine, and can be manufactured to be lightweight and compact. Since the working gas is designed to flow in one direction, the flow resistance can be reduced and the performance of the regenerative heat exchanger can be improved. In addition, the inventor believes that high efficiency and high output can be obtained even if the working gas is air with little leakage for the above-mentioned reason. The leakage of the working gas is easy because it is prevented by the apex seal and the seal of the rotating shaft.

According to the present invention, the crankshaft is rotated by power, and based on the reversible cycle theory of the Stirling engine,
It can also be used as a refrigerator.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view

FIG. 2 is a front sectional view

FIG. 3 is a side sectional view

FIG. 4 is a top sectional view

FIG. 5 is a continuous diagram of an operating state.

FIG. 6 is a cross-sectional view of a conventional displacer-type Stirling engine.

[Explanation of symbols]

1 is a block case with a built-in rotary displacer integrated with a rotary engine block. Reference numeral 2 denotes a working gas flow passage containing a regenerative heat exchanger. 3 is a working gas flow capillary. 4 is a rotor housing. 5 is a rotary displacer. 6 is a rotor. 7 is a heat transfer wire. Reference numeral 8 denotes a working gas discharge passage having a built-in regenerative heat exchanger. 9 is an apex seal. 10 is a superheated thin tube. 11 is the apex seal of the rotor. 12 is a water-cooled jacket. 13 is a rotation axis. 14 is the volume chamber of the rotary displacer. Reference numeral 15 denotes a rotary engine volume chamber. 16 and 17 are biston rods. 1
8 and 19 are connecting rods. 20 is a rod seal.
21 is a flywheel. 22 is an ignition line. 23 is a fuel injection nozzle. 24 is a rotary shaft of a rotary displacer. 2
5 is a bearing.

Claims (2)

[Claims] 1. A type in which a block case of a rotary engine is formed in a cylindrical shape, and a rotary displacer having a shape obtained by cutting the upper surface of a cylinder around the outer periphery of the cylindrical block case with a rotation axis in the same direction. 2. A mechanism for rotating the rotary displacer according to claim 1 at a speed three times the speed of a power rotor of a rotary engine.