JPS6250656B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot gas engine having a displacer-like mechanism for moving gas between a hot space and a cold space.

A conventional example of this type of device will be explained with reference to FIG.

In FIG. 1, a displacer 2, a piston 3, a displacer rod 4, and a piston rod 5 are provided for reciprocating movement within a cylinder 1 of a hot gas engine.

As the displacer 2 descends, the low-temperature gas in the low-temperature space 6 is pushed out and passes through the cooler 7.
When passing through the regenerator 8 and the heater 9, the gas is heated and becomes a high-temperature gas, which enters the high-temperature space 10. At this time, the gas expands and its pressure increases;
It is transmitted to the low temperature space 6 on the side of the displacer 2, and further transmitted through the flexible partition plate 11 to the low temperature space 12 on the side of the piston 3, pushing the piston 3 downward. When the displacer 2 rises, the above is reversed, and the output is finally taken out from the drive mechanism (not shown) through the piston rod 5, and part of it moves the displacer 2 through the displacer rod 4. It becomes power.

Here, when lubricating oil is used in the piston 3 and the oil is used to prevent gas leakage, the oil is carried from the low-temperature space to the high-temperature space by the movement of gas, where it is heated. A flexible diaphragm 11 is installed in order to prevent problems such as deterioration due to gas deterioration, adhesion and accumulation within the device, and clogging of gas passages.

However, in this method, if there is a pressure difference between the low-temperature space 6 and the low-temperature space 12 before operating the heat engine, or if the input to the hot gas engine is excessively increased or decreased, the diaphragm 11 is removed from the piston 3 side or It is pressed against the sprayer 2 side, causing a difference in the fluctuating pressure on both sides of the diaphragm 11, applying force to the diaphragm 11, shortening the life of the diaphragm 11, and causing a loss of power.

The present invention provides a hot gas engine that eliminates the above-mentioned conventional drawbacks. That is, in the present invention, a control device having a throttle valve and a diaphragm such as a bellows or a diaphragm is provided between the spaces on both sides of the diaphragm, and the pressure in the spaces on both sides of the diaphragm is always kept the same. It is something to do.

Hereinafter, details of the present invention will be explained together with examples.

FIG. 2 shows an embodiment of the present invention, in which a throttle valve 14, a bellows, a diaphragm, etc. Control device 15 with plate 13
It is a circuit with , which is connected. This control device 1
The internal volume of the spacer 5 is sufficient to adjust the pressures of both spaces divided by the flexible partition plate 11 to the same level. For this reason, this control device 1
Since the internal volume of 5 will be large to some extent, if it is installed as is, it will become a dead volume and there will be a loss when extracting power. Therefore, a throttle valve 14 is provided in the passage, and while the heat engine is operating, almost no gas reaches the control device 15 due to the resistance of the throttle valve 14.
The control device 15 does not become a dead volume, and the obtained power can be taken out as output with almost no loss. or,
Since the pressure in both spaces divided by the partition plate 11 can be adjusted to the same level by the control device 15, the life of the partition plate 11 will not be shortened due to excessive force being applied to the partition plate 11.

Furthermore, since different gases can be used in each space divided by the flexible partition plate 11, the displacer 2 side is equipped with gases such as hydrogen and helium, which have excellent properties as a heat medium. It is also possible to combine a hot gas engine and a refrigerator by using Freon or the like on the piston 3 side, but even in this case, the capacity can be controlled by changing the pressure of the gas sealed on the heat medium side. There are advantages.

The hot gas engine of the present invention overcomes the conventional drawbacks, maintains the same pressure on both sides of the flexible diaphragm, prevents deterioration, and has an excellent effect of increasing the service life.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a part of a conventional hot gas engine, and FIG. 2 is a sectional view showing a part of a hot gas engine according to an embodiment of the present invention. 6...Low temperature space on the displacer side, 11...
Flexible partition plate, 12...low temperature space on the piston side,
13... Flexible partition plate, 14... Throttle valve, 15...
…Control device.

Claims (1)

[Claims] 1. A space formed by the inner wall of the cylinder and the piston is divided into a high temperature space and a low temperature space by a movable piston-shaped object, and a heater, forming a side passage in which a heat storage device and a cooler are arranged, and installing a partition plate between the surface of the piston-shaped object or a rod that drives the object in the low-temperature space and the inner wall surface of the cylinder; By making the diaphragm flexible, the fluctuating pressures of the gas on both sides of the diaphragm always take approximately the same value, and the heater or the cooler can be used to adjust the temperature between high and low temperatures. In a hot gas engine having a structure in which the expansion or contraction pressure of the reduced gas is transmitted to the gas separated from the expanded or contracted gas via the diaphragm, and further transmitted to the piston from which output is taken out, both sides of the diaphragm are A hot gas engine characterized in that the spaces between the two are connected by a circuit including a throttle valve and a control device having a diaphragm such as a bellows or a diaphragm.