JPH09151794A - Free piston type vuilleumier cycle engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a free piston type Vuilleumier cycle engine which can reduce a capacity of a gas spring chamber for and a high temperature displacer can easily adjust this capacity. SOLUTION: An external combustion engine is constituted by using a regenerative cycle provided with a gas passage 7 for communication between high/low temperature part intermediate temperature chambers 2, 3. Here, a low temperature displacer rod 11 is formed hollowly as a hollow chamber storing a high temperature displacer rod 10, the inside of a low temperature displacer 9 is made hollowly to serve as a low temperature displacer use gas spring chamber 6, the hollow chamber is protruded in this spring chamber 6 to serve as a high temperature displacer use gas spring chamber 5, and a reservoir 22 adjusting a capacity of the spring chamber 5 is provided in the outside of the engine. Here, in lieu of the reservoir, high temperature gas spring chamber use cylinder and piston are provided, and in this piston, deformation can be taken such as providing a means adjusting a capacity of actuator or the like comprising movable/fixed magnet coils.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a free piston type Wilmie cycle engine (hereinafter simply referred to as a free piston type VM engine), and more particularly, a free piston suitable for an air conditioner, a refrigerator, etc. by downsizing the entire VM engine. Formula VM engine.

[0002]

2. Description of the Related Art A conventional free piston type VM engine has a structure as shown in FIG. In the figure, the high temperature displacer 101 has a stepped rod in which a displacer piston rod 102 of diameter a and a displacer piston rod 103 of diameter b are connected in series, and the end of the displacer piston rod 103 is forced by a linear actuator 104. It is driven up and down in the drawing. On the other hand, on the outside of the cylindrical sleeves 105a and 105b, the high temperature side high temperature section heat exchanger 106a,
A high temperature side regenerator 107, a high temperature side middle temperature part heat exchanger 108, a low temperature side middle temperature part heat exchanger 109, a low temperature side regenerator 110 and a low temperature side low temperature part heat exchanger 111 are provided, and a high temperature side middle temperature part heat exchanger is provided. 108 and the low temperature side intermediate temperature heat exchanger 109 are integrated via a ring-shaped portion 112. Further, the high temperature side regenerator 107, the high temperature side intermediate temperature heat exchanger 108, and the low temperature side intermediate temperature heat exchanger 109 are respectively provided with a high temperature side cylindrical shell 113 and medium temperature side cylindrical shells 114a and 114b, A low temperature side cylindrical shell 115 is disposed outside the low temperature side regenerator 110 and the low temperature side low temperature section heat exchanger 111 to be isolated from the outside. An electric heater 106 is provided on the head of the high temperature side cylindrical shell 113, and for heating, the high temperature side middle temperature section heat exchanger 108 and the low temperature side middle temperature section heat exchanger 10 are provided.
Heat is taken out from the heat exchanger 9, and cold heat is given from the low temperature side low temperature section heat exchanger 111 for cooling. Water is arranged as a carrier medium outside each heat exchanger. Here, the working gas such as helium in the high temperature working space 116 and the middle temperature working space 117 heated by the electric heater 106 heats the outer water through the high temperature side middle temperature part heat exchanger 108, while the low temperature working space is heated. 118 and medium temperature working space 117
The working gas inside heats the outside water via the low temperature side middle temperature section heat exchanger 109, and at the same time, the low temperature side low temperature section heat exchanger 111.
Takes heat from the outside water through. At this time, the vertical movement of the high-temperature displacer 101 moves the working gas between the high-temperature operating space 116 and the intermediate-temperature operating space 117 to a high-temperature high-temperature heat exchanger 106a, a high-temperature regenerator 107, and a high-temperature intermediate-temperature heat exchanger. Alternate through 108. The vertical movement of the low temperature displacer 119 causes the working gas to pass between the low temperature operating space 118 and the intermediate temperature operating space 117 through the low temperature side low temperature section heat exchanger 111, the low temperature side regenerator 110 and the low temperature side intermediate temperature section heat exchanger 109. And let them alternate. At that time, pressure changes due to a change in the ratio of the high temperature working gas to the low temperature working gas.
The volume change caused by the difference between the diameters a and b of 2, 103 causes an exciting force to the low temperature displacer 119, and the low temperature displacer 119 operates so as to maintain a certain phase difference with the high temperature displacer 101. At this time,
Due to the heat storage effect of each regenerator 107, 110, the temperature of each operating space is kept constant. The output of the engine is to utilize the heat release and absorption of the heat exchangers 106a, 108, 109 and 111 for heating and cooling. Also, 120
Is an auxiliary mechanical spring for a low temperature displacer, 121 is a rod seal for the working space 118, 122 is a mechanical spring for a high temperature displacer, 123 is a buffer chamber for maintaining an appropriate pressure value, 124 is a rod seal for the buffer chamber, 12
5 is a gas spring chamber in the low temperature displacer.

[0003]

By the way, the conventional free piston type VM engine has the following problems because it is configured as described above. Since the mechanical spring for the high temperature displacer was provided in the buffer chamber outside the engine, the entire VM engine becomes large. Further, in the conventional case, since the displacer rod penetrates the low temperature chamber, it is necessary to dispose a seal portion, and there is a possibility that gas leakage or friction loss may occur in this seal portion. Further, it has been desired to reduce the size of the gas spring chamber for the high temperature displacer. In addition, it has been demanded that an external auxiliary device can be integrally provided. It is an object of the present invention to provide a free piston type VM engine that solves the above problems (problems) of the related art.

[0004]

In order to solve the above-mentioned problems, the present invention provides, as a first invention, a regeneration cycle in which a gas passage for connecting a high temperature middle greenhouse and a low temperature middle greenhouse is provided. In a free-piston type Wilmie cycle engine that is an external combustion engine that uses a low temperature displacer rod as a hollow chamber for storing the high temperature displacer rod, and the low temperature displacer is hollow as a low temperature displacer gas spring chamber, A free piston in which a hollow chamber is extended into a gas spring chamber for a low temperature displacer to form a gas spring chamber for a high temperature displacer, and a reservoir for a high temperature gas spring chamber for adjusting the volume of the gas spring chamber for the high temperature displacer is externally provided. A second type invention is provided as the first invention.
In place of the high temperature gas spring chamber reservoir in the configuration of the invention, a high temperature gas spring chamber cylinder and a high temperature gas spring chamber piston for adjusting the volume of the high temperature displacer gas spring chamber are provided. There is provided a free piston type Wilmier cycle engine in which a piston for driving is driven by an actuator composed of a movable magnet coil and a fixed magnet coil. As a third invention, in the configuration of the second invention, the actuator further comprises: A fourth aspect of the present invention provides a free-piston type Vilmier cycle engine in which a drive device for an external auxiliary machine that is interlocked is added. In a fourth aspect of the present invention, a machine for high-temperature displacer is provided inside the gas spring chamber for high-temperature displacer. Install the spring and place it in the low temperature gas spring chamber. Is obtained so as to provide a free-piston Vuilleumier cycle engine was provided a low-temperature displacer for mechanical spring mounted on Saroddo.

According to the first aspect of the invention, the size of the gas spring chamber for the high temperature displacer is reduced and the entire engine is made compact. According to the second aspect of the invention, the high temperature gas spring chamber is provided in place of the reservoir. The size of the high temperature gas spring chamber cylinder is reduced, and according to the third invention, it is not necessary to separately install an external auxiliary machine. According to the fourth invention, V
The operation as the M engine can be further stabilized.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the first to fourth embodiments shown in FIGS. First Embodiment: The first embodiment of the present invention is configured as shown in FIG. In the figure, 1 is a high temperature chamber, 2
Is a high temperature medium greenhouse, 3 is a low temperature medium greenhouse, and 4 is a low temperature chamber. Reference numeral 5 is a gas spring chamber for a high temperature displacer, and 6 is a gas spring chamber for a low temperature displacer. Further, 7 is a gas passage that connects the high temperature middle greenhouse 2 and the low temperature middle greenhouse 3 to each other, 8 is a high temperature displacer, 9 is a low temperature displacer, 10 is a high temperature displacer rod, and 11 is a low temperature displacer rod. Further, 12 is a heater, 13 is a high temperature side regenerator, 14 is a low temperature side regenerator, 15 is a high temperature part radiator, 1
6 is a low temperature radiator, 17 is a cooler, 18 is a high temperature displacer mechanical spring, and 19 is a low temperature displacer mechanical spring. Further, 20 is a gas passage for the reservoir, 2
Reference numeral 1 is a flow rate adjusting valve, and 22 is a reservoir for the high temperature gas spring chamber. In the present embodiment, as described above, the inside of the low temperature displacer rod 11 is formed hollow to form the high temperature displacer gas spring chamber 5, and the high temperature displacer mechanical spring 1 is placed inside the high temperature displacer gas spring chamber 5.
8, a mechanical spring 19 for the low temperature displacer mounted on the low temperature displacer rod 11 is provided in the gas spring chamber 6 for the low temperature displacer, and the gas spring chamber 5 for the high temperature displacer and the gas passage 2 are provided outside the engine.
0 and the high-temperature gas spring chamber reservoir 22 that communicates with each other via the flow rate adjusting valve 21. In the present embodiment, as described above, since the gas spring chamber reservoir 22 that communicates with the high temperature displacer gas spring chamber 5 is provided outside, the high temperature displacer gas spring chamber 5 provided inside the engine is correspondingly provided. Will be smaller and the entire engine will be more compact.
The gas supplied to the high temperature gas spring chamber reservoir 22 can be adjusted to a desired value by the flow rate adjusting valve 21. Further, since the rod does not penetrate the low temperature chamber as in the conventional case, no seal is required, gas leakage is eliminated, and heat loss and mechanical loss due to friction are reduced. Further, in the present embodiment, the mechanical spring for the high temperature displacer, which is provided outside the engine in the conventional VM engine, is housed inside the low temperature displacer rod arranged inside the engine. V from the point
The configuration of the entire M engine can be downsized.

Second Embodiment: The second embodiment of the present invention is constructed as shown in FIG. In the figure,
The same components as those in the first embodiment are designated by the same reference numerals as those in FIG. 1, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 2, instead of the high temperature gas spring chamber reservoir 22 of the first embodiment, a high temperature gas spring chamber cylinder 23 and a high temperature gas spring chamber cylinder 23 are built in. A high-temperature displacer gas spring chamber volume adjusting means including a high-temperature gas spring chamber piston 24, a piston holding spring 25, a movable magnet coil 26, and a fixed magnet coil 27 is provided in a cylinder gas passage 20a via a flow rate adjusting valve 21. The feature of the structure is that they are connected. In the present embodiment, since the volume adjusting means for adjusting the volume of the gas spring chamber for the high temperature displacer is performed by driving the piston for the high temperature gas spring chamber by the actuator composed of the movable magnet coil and the fixed magnet coil, the volume is fixed. The size of the cylinder for the high temperature gas spring chamber can be made smaller than that of the reservoir for the high temperature gas spring chamber according to the first embodiment. The gas supplied to the high temperature gas spring chamber cylinder 23 can be adjusted to a desired value by the flow rate adjusting valve 21. Further, as in the first embodiment, a seal is unnecessary, gas leakage is eliminated, and heat loss and mechanical loss due to friction are reduced.

Third Embodiment: A third embodiment of the present invention is constructed as shown in FIG. In the figure,
The same components as those in the second embodiment are designated by the same reference numerals as those in FIG. 2, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 3, in addition to the configuration of the second embodiment, an external accessory drive unit that works in conjunction with the above-mentioned actuator is added. This external auxiliary drive can be used for air blowers, water pumps, etc.,
As shown in the figure, the auxiliary machine cylinder 38, the auxiliary machine piston 39, the piston holding spring 40, the diaphragm 41, the suction port 42, and the discharge port 43 are included, and a crank mechanism may be added to the auxiliary machine piston 39 if necessary. good. Due to the existence of the auxiliary machine such as the auxiliary machine cylinder that interlocks with the actuator of the cylinder for the high temperature gas spring chamber provided in the present embodiment, the external auxiliary machine usually provided separately in the VM engine becomes unnecessary. Also in this embodiment, the gas supplied to the high temperature gas spring chamber cylinder 23 can be adjusted to a desired value by the flow rate adjusting valve 21, and
As in the first embodiment, the seal is not required, gas leakage is eliminated, and heat loss and mechanical loss due to friction are reduced.

Fourth Embodiment: In this embodiment, in the structure of the first to third embodiments, as shown in FIGS. 1 to 3, inside the gas spring chamber 5 for the high temperature displacer. A mechanical spring 18 for a high temperature displacer is mounted on the above, and a mechanical spring 19 for a low temperature displacer mounted on a low temperature displacer rod 11 is provided in the gas spring chamber 6 for a low temperature displacer. By doing so, the action of the mechanical spring is promoted in addition to the action of the gas spring, so that the operation of the VM engine becomes more stable.

[0010]

As described above, according to the present invention, first, the low temperature displacer rod is hollowed to form a hollow chamber for accommodating the high temperature displacer rod, and the low temperature displacer is hollowed to form a gas spring chamber for the low temperature displacer. Therefore, it has the following excellent effects. Since the rod does not need to penetrate through the low temperature chamber as in the past, there is no need for a seal and there is no gas leakage.
Mechanical loss due to heat loss and friction is reduced. In the present invention, the mechanical spring for the high temperature displacer, which is conventionally provided outside the VM engine, is housed inside the low temperature displacer rod arranged inside the engine, so that the overall configuration of the VM engine is significantly reduced in size. To be done.
Therefore, a free piston type VM engine suitable for an air conditioner, a refrigerator, etc. can be obtained. Further, according to the present invention, in addition to the above configuration, a gas spring chamber reservoir or a gas spring chamber piston for adjusting the volume of the high temperature displacer gas spring chamber outside the engine, a movable magnet coil and a fixed magnet coil. Since the volume adjusting means for the gas spring chamber for the high temperature displacer such as the actuator is provided, it also has the following excellent effects. According to the first aspect of the present invention, the size of the gas spring chamber for the high temperature displacer is reduced, and the entire engine is made compact. According to the second invention, in addition to the effects of the first invention,
The size of the hot gas spring chamber cylinder provided in place of the hot gas spring chamber reservoir is reduced. According to the third invention, in addition to the effects of the second invention,
Eliminates the need to install external auxiliary equipment separately. According to the fourth invention, in addition to the effects of the third invention,
The operation as the VM engine becomes more stable.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing the configuration of a free piston type VM engine according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing the configuration of a free piston type VM engine according to a second embodiment of the present invention.

FIG. 3 is a vertical sectional front view showing the configuration of a free piston type VM engine according to a third embodiment of the present invention.

FIG. 4 is a vertical sectional front view showing the configuration of a conventional free piston type VM engine.

[Explanation of symbols]

 5: Gas spring chamber for high temperature displacer 6: Gas spring chamber for low temperature displacer 7: Gas passage 8: High temperature displacer 9: Low temperature displacer 10: High temperature displacer rod 11: Low temperature displacer rod 18: Mechanical spring for high temperature displacer 19: For low temperature displacer Mechanical spring 20: Gas passage for reservoir 20a: Gas passage for cylinder 21: Flow control valve 22: Reservoir for high temperature gas spring chamber 23: Cylinder for high temperature gas spring chamber 24: Piston for high temperature gas spring chamber 25: Piston holding spring 26 : Moving magnet coil 27: Fixed magnet coil 38: Auxiliary machine cylinder 39: Auxiliary machine piston 40: Piston holding spring 41: Diaphragm 42: Suction port 43: Discharge port

Claims (4)

[Claims] 1. In a free piston type Wilmie cycle engine which is an external combustion engine using a regeneration cycle in which a gas passage for communicating between a high temperature medium greenhouse and a low temperature medium greenhouse is provided, the low temperature displacer rod is hollow. As a hollow chamber for housing the high-temperature displacer rod, and as a gas spring chamber for the low-temperature displacer by making the inside of the low-temperature displacer hollow.
The hollow chamber is extended into the low temperature displacer gas spring chamber to form a high temperature displacer gas spring chamber, and a high temperature gas spring chamber reservoir for adjusting the volume of the high temperature displacer gas spring chamber is provided outside. Free piston type Wilmier cycle engine characterized by. 2. A low-temperature displacer rod is hollow in a free-piston type Wilmie cycle engine, which is an external combustion engine using a regeneration cycle in which a gas passage is provided to connect a high temperature medium greenhouse and a low temperature medium greenhouse. As a hollow chamber for housing the high-temperature displacer rod, and as a gas spring chamber for the low-temperature displacer by making the inside of the low-temperature displacer hollow.
A cylinder for high temperature gas spring chamber, a high temperature gas spring chamber for adjusting the volume of the gas spring chamber for high temperature displacer to the outside by projecting the hollow chamber into the gas spring chamber for low temperature displacer. A free piston type Wilmie cycle engine, characterized in that a piston for a high temperature gas spring chamber is provided, and the piston for a high temperature gas spring chamber is driven by an actuator composed of a movable magnet coil and a fixed magnet coil. 3. A low-temperature displacer rod is hollow in a free-piston Wilmie cycle engine, which is an external combustion engine that uses a regeneration cycle in which a gas passage is provided to connect a high temperature medium greenhouse and a low temperature medium greenhouse. As a hollow chamber for housing the high-temperature displacer rod, the hollow chamber overhangs the low-temperature displacer gas spring chamber as a high-temperature displacer gas spring chamber, and for adjusting the volume of the high-temperature displacer gas spring chamber outside, Provide a cylinder for high temperature gas spring chamber, a piston for high temperature gas spring chamber,
A free piston characterized in that the piston for the high temperature gas spring chamber is driven by an actuator composed of a movable magnet coil and a fixed magnet coil, and further, a drive machine for an external auxiliary machine interlocking with the actuator is added. Formula Wilmier Cycle Organization. 4. A free piston type Wilmie cycle engine, which is an external combustion engine using the regeneration cycle according to any one of claims 1 to 3, wherein a mechanical spring for a high temperature displacer is provided inside the gas spring chamber for the high temperature displacer. A free piston type Wilmier cycle engine characterized in that a mechanical spring for a low temperature displacer mounted on the low temperature displacer rod is provided in the low temperature side gas spring chamber.