JPS6250655B2 - - 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.
When passing through the cooling section 7 and passing through the regenerator 8 and heater 9, it 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, which is transmitted to the low temperature space 6 on the displacer 2 side.
Furthermore, the piston 3 is inserted through the flexible diaphragm 11.
It is transmitted to the low temperature space 12 on the side and pushes 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 a part of it is sent to the displacer 2 through the displacer rod 4. It becomes the force that moves the.

Here, if lubricating oil is used in the piston 3 and the oil is used to prevent gas leakage, the oil will be carried from the low temperature space to the high temperature space by the movement of gas, and there it will be exposed to heat. A flexible partition plate 11 is installed to prevent the gas from deteriorating and depositing in the device, causing problems such as blocking the gas passage.

However, this method does not work when there is a difference in pressure between the low temperature space 6 and the low temperature space 12 before operating the heat engine, or when the input to the hot gas engine is increased or decreased excessively.
The partition plate 11 is on the piston 3 side or on the displacer 2 side.
This causes a difference in the fluctuating pressure on both sides of the diaphragm, which applies force to the diaphragm 11, shortens the life of the diaphragm 11, and causes 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 device having an oil filter 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 maintained at the same level.

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

FIG. 2 shows an embodiment of the present invention, in which a device 14 having an oil filter 13 connects a low-temperature space 6 and a low-temperature space 12, which are separated by a flexible partition plate 11. are doing.

Therefore, the oil filter 13 prevents oil from being carried to the high temperature space, and the pressure in the low temperature space 6 and the pressure in the low temperature space 12 can always be kept the same, and the pressure difference between the two spaces allows the partition plate 11 to There is no problem such as shortening of the life due to being forced by the hot gas engine, and the fluctuating pressure in the low temperature space 6 and the fluctuating pressure in the low temperature space 12 are well transmitted to each other during operation of the hot gas engine, and the obtained power is hardly lost. ,
This has the advantage that it can be taken out as an output through the piston 3, piston rod 5, and drive mechanism (not shown). The hot gas engine of the present invention eliminates the conventional drawbacks, maintains the same pressure in the space on both sides of the flexible diaphragm, prevents deterioration and increases the service life, and the power obtained is almost lost. This provides an excellent effect in that it can be extracted as output without any problems.

[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 diagrammatic 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...Oil filter.

Claims (1)

[Claims] 1 The 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 is installed in order from the high-temperature space side to the low-temperature space side. , 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 and the inner wall surface of the cylinder in the low temperature space part. , by making the diaphragm flexible, the fluctuating pressures of the gas on both sides of the diaphragm always take approximately the same value; A hot gas engine having a structure in which the expansion or contraction pressure of the gas which has become high temperature or low temperature is transmitted to the gas separated from the expanded or contracted gas through the partition plate, and further transmitted to the piston that extracts the output. A hot gas engine characterized in that the spaces on both sides of the partition plate are connected by a device having an oil filter.