JPS601249Y2 - Working gas adjustment device for rotary machine type external combustion engine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotary extraction type external combustion engine that performs a cycle similar to the long tarling cycle □, and particularly relates to its working gas adjustment device, which prevents unnecessary compression phenomena in the working chamber. It is an object of the present invention to provide a working gas regulating device for obtaining an efficient engine that allows smooth operation using working gas.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In this embodiment, as shown in FIG.
A rotary machine is used, which is equipped with a rotor 9 whose inner surface 6 has a four-node peritrochoid curve shape, and whose outer peripheral curve 8 is slightly concave than the line 7 that envelops this.

10 indicates backing. Two such rotary machines are used as shown in Figure 2, and one of them, rotary machine 1, is used.
1' is a gas expansion part on the heating side, and the other rotary machine 11 is a gas compression part on the cooling side.
．． The rotaries 9, 9' of 11' are connected 1 at appropriate intervals by an eccentric shaft 12 while maintaining their relative angular positions appropriately, and the extension of this eccentric shaft 12 is used as an output shaft.

And the corresponding intake and exhaust ports 1 and 1', 2 and 2', 3 and 3', 4 and 4' of these rotary machines 11, 11'
A heating section 13, a regenerator 14, and a cooler 15 are arranged in the middle of each pipe, and the connecting pipes I to ■ are used to connect the pipes, filling the inside with working gas, and connecting the expansion part of the pipe to the rotary machine 11' side from the outside. A rotary extraction type external combustion engine is constructed which generates operation by heating and cooling the compression section rotary machine 11 side from the outside.

Note that the regenerator 14 stores the heat of the high temperature working gas flowing from the expansion section rotary machine 11' side to the compression section rotary machine 11 side, and when the flow of the working gas is reversed, it heats the low temperature working gas. The lachrymator 15 has a net-like or plate-like metal material inside it, and the tear collector 15 cools the outside of the tube with a suitable coolant, such as cooling water 16.

Figure 2 shows the piping configuration in a plan view to make it easier to understand, and 1 to 4.1' to 4' indicate the positions of the intake and exhaust ports of the compression section rotary machine 11 and the expansion section rotary machine 11', respectively. show.

The reason why this type of engine operates in a cycle similar to the already known Stirling cycle (the rotors 9, 9' rotate) is not directly related to the gist of the present invention, and will therefore be omitted.

In such a rotary machine type external combustion engine, between adjacent intake and exhaust ports of the casing 5' of the expansion section rotary machine 11', that is, 1' and 4', 1' and 2', 2' and 3', 3'
Exhaust holes 1'a and 2' are located approximately in the center between 1'a and 4'.
'a, 3'a, 4'a are provided, and between adjacent intake and exhaust ports of the casing 5 of the compressor rotary machine 11', that is, 1
Intake holes 1a, 2a, 3a, and 4a are provided at locations approximately in the center between 4.1, 2.2, 3.3, 4, and 4, and these exhaust holes 1'a to 4'a are Communication pipes 1'b, 2'b are directly connected to corresponding intake holes 1a to 4a.

Opening/closing valves 1'c and 2'c are located between 3'b and 4'b, respectively, and open and close at appropriate times in relation to the rotor rotational angular position.
, 3'c, and 4'c are inserted to constitute the working gas regulating device of the present invention.

Next, the function of the book and the invented device will be explained.

Figure 3 shows two rotors with a phase difference of 180°9.9
’ rotor 9 when rotated by a common eccentric shaft 12
, 9' is illustrated for easy understanding of a state of change in the relative position of the rotor 9. This figure shows one state of the change in the volume occupied by the compression section and expansion section of the rotary machine 11 and 11' of the pipe light 1-1' as the pipe 9' rotates.

Consider a state where the rotors 9, 9' have rotated a little further than the state shown in FIG. 3A.

In this case, from the moment the tip of the rotor 9' passes through the intake/exhaust port 4', the outer periphery of the rotor 9' and the inner surface of the casing, 6'
and the working gas space surrounded by both side walls (Fig. 2B)
The gas in (7E shown with diagonal lines) is compressed, and the loader, 9
Gas in a similar working gas space on the side (indicated by diagonal lines in FIG. 2B) undergoes the opposite phenomenon of expansion.

Although this phenomenon occurs for a short period of time, the tip of the rotor 9'
This continues until the tip of the rotor 9 reaches 1.

In this case, the work of compressing the former gas is wasted work, so if the on-off valve 1'c is adjusted to be open during this period, the gas to be compressed on the expander side will be released through the exhaust hole 1'a1.
It flows into the intake hole 1a through the on-off valve 1'c and helps the expansion of the compressor side, thereby eliminating the loss.

The actions of the communication pipes 2'b to 4'b and the on-off valves 2'c to 4'c can be similarly explained.

The above-mentioned operation can be easily achieved by using a solenoid valve as the opening/closing valve and adjusting it so that it is opened only during an appropriate period in relation to the rotational angular position of the rotor.

As described above, according to the present invention, an exhaust hole is provided approximately in the center between adjacent intake and exhaust ports in the casing of the rotary machine for the expansion section, and an intake hole is provided at the same position in the casing of the rotary machine for the compression section. These mutually corresponding exhaust holes and intake holes are connected by a connecting pipe, and an on-off valve is inserted into each of these connecting pipes, and the lever on-off valve is operated at an appropriate time in relation to the rotational angular position of the rotor. In other words, the on-off valve is opened at the moment when the working gas is positively compressed and the pressure starts to rise on the expansion section rotary machine side, and the on-off valve is closed on the compression section rotary machine side just before compression ends. No. 1977-77741
3), there is no wasted compression work until the pressure in the working chamber on the expansion section rotary machine side rises to the set pressure, and this wasteful compression work is eliminated by helping the compression section rotary machine side expand. (Loss) can be avoided and the working gas of this type of engine can be operated smoothly.
It is possible to provide a working gas regulating device for obtaining a more efficient engine than the device of No. 1.

In addition, when this type of engine is used as a prime mover for a generator, and it is necessary to increase or decrease the output at a constant rotation speed, it is necessary to prevent the efficiency from decreasing at partial loads by filling the engine with gas (e.g. It is necessary to control the amount of helium gas (helium gas), and in this case, in the device of Utility Application No. 77741/1984, it is necessary to adjust the set pressure of the relief valve each time to control the gas amount, but with the present invention. The amount of filling of the working gas can be appropriately controlled to easily respond to changes in output.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of a rotary machine according to the present invention, and Fig. 2 is an explanatory diagram showing a configuration in which the present invention device is applied to an external combustion engine configured using two rotary machines of Fig. 1. , FIGS. 3A to 3C are explanatory diagrams of the operation. 1-4, 1'-4'...Intake and exhaust holes of the compression section rotary machine 11 and expansion section rotary machine 11', respectively, 1a-4a...Intake holes, l'a-4' a...
Curved exhaust port, l'b ~ 4'b...Connecting pipe, l'c
~4'c...Opening/closing valve, 5,5'...Casing, 6,6'...Casing inner surface, 7.
...Inner enveloping line, 8°8'...Outer curve, 9,9' River...Rotor 11°11'...
...2 rotary machines, 12...Eccentric shaft, 1
3... Heating section, 14... Regenerator, 15
...Curved cooler, I~■...Connecting pipe.

Claims (1)

[Scope of utility model registration request] The inner surface of the casing has a four-node peritrochoid curve shape, and two rotary machines equipped with five-lobed rotors having an outer circumferential curve slightly concave than the inner line are used, and one of the rotary machines is expanded with gas. The other rotary machine is used as a gas compression section, and each rotor is connected by an eccentric shaft while keeping the relative angular position appropriately, and the extension of this eccentric shaft is used as an output shaft. Each of the corresponding intake and exhaust ports is arranged in the middle of the pipe with a connecting pipe, and the expansion part of this pipe is filled with working gas. In a rotary machine-type external combustion engine that generates power by heating the tally machine side i from the outside and cooling the compression part 1 - the tally machine side from the outside 1, the expansion part rotor 1y - machine generates power. Adjacent to the cage jig: An exhaust hole is provided approximately in the center between the Nabari exhaust ports, and air intake and exhaust is provided approximately in the center between the convex portions of the compressor rotary machine 9' casing.
These left side corresponding exhaust holes and intake holes are connected to the connecting pipe 4+
An fIIIm gas regulating device for a ronitary type external combustion engine is constructed by connecting and inserting on-off valves that open and close according to the rotation angle of the rotor in the middle of each connecting pipe.