JPS62206307A - External combustion type heat engine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an external combustion heat engine that operates on a Rankine cycle or a cycle similar thereto.

[Conventional technology]

As this type of external combustion type heat engine, a steam engine using water as one working stream as shown in FIG. 2 has been known. Referring to FIG. 2, saturated water a is adiabatically compressed by supply bomb 7''1.

A pressure water tank is supplied to the grate 2 (first adiabatic change). The pressure water bath is heated isobarically in the boiler 2 and becomes superheated steam C (first isobaric change). The superheated steam C expands adiabatically within a pressure/mechanical conversion device such as the turbine 3 and becomes low-pressure, low-temperature wet steam d (second adiabatic change). A load such as a generator 4, for example, is coupled to the output shaft 31 of the turbine 3.

The generator 4 is driven and generates electricity. That is, engine output is extracted from the output shaft 31 of the turbine 3. The wet steam d is
It is isobarically cooled in a condenser such as the condenser 5, and is contracted and condensed to return to the original saturated water a (second isobaric change). This cycle is called the U/Kin cycle.

Conventionally, the supply pump 1 used for this external combustion heat engine is
It is driven by a dedicated drive source 1, for example, an electric motor 6, or by a dedicated 4-ramp shaft driven from an output shaft of one engine via a belt or the like.

[Problem that the invention seeks to solve]

In such conventional external combustion heat engines using electric motors, the amount of water (working fluid) supplied by the supply pump depends on the output status (for example, the number of rotations per revolution) of the turbine (pressure/mechanical conversion device). In order to control this, it is necessary to add more complicated means, such as means for detecting the rotation speed of the turbine output shaft, etc., and means for controlling the electric motor that drives the supply pump according to the output of this detection means. Ta. As a result, the supply pump becomes large and complicated, and the entire system becomes large and complicated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a compact and simple structure for an external combustion heat engine having a supply pump that can always supply an adequate amount of working fluid.

[Means for solving problems]

In the external combustion heat engine according to the present invention, the drive section of the supply pump is attached to the output shaft of the pressure/mechanical conversion device, and the rotational output of the pressure/mechanical conversion device is used as a direct drive source for the supply pump. Features.

[Effect]

According to such a configuration, the supply pump can supply working fluid proportional to the rotational speed of the pressure/mechanical converter, and the crank portion of the supply pump is optimized for the output shaft of the pressure/mechanical converter. Once installed, from then on,
An optimal working fluid supply amount can always be ensured.

〔Example〕

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

Referring to FIG. 1, the configuration of an embodiment of an external combustion heat engine according to the present invention is shown in a system diagram.

Components having the same configuration as in FIG. 2 are given the same reference numerals. The difference from FIG. 2 is that the drive section of the supply pump 1 is directly coupled to the output shaft 31 of the pressure-mechanical conversion device 3.

Referring to FIG. 3, there is shown a sectional view of the structure of an embodiment of the supply pump used in the external combustion heat engine of the present invention. In this embodiment, a reciprocating pump is used as the supply pump l. The reciprocating pump l is arranged in the crank chamber 32 of the pressure-mechanical converter 3.

A crank disk 70 is attached to the end of the output shaft 31 of the pressure/mechanical converter 3. Furthermore, this disk is removable as shown in FIG.

The reciprocating pump 1 has a cylinder 11 fixedly installed on the inner wall of the crank chamber 32 within the crank chamber 32 .

A piston 12 is slidably housed within the cylinder 11. The working fluid from the condenser 5 is supplied to the inner wall of the crank chamber 32 in the longitudinal direction of the cylinder 11.
A suction port 1a for drawing the working fluid into the cylinder 11 and a discharge port 1b for discharging the working fluid from the cylinder 11 to the gutter 2 are open. or.

The suction valve 13 that controls opening and closing of the suction port 1a is connected to the cylinder 11.
A discharge valve 14 for controlling opening and closing of the discharge port 1b is provided on the inner wall of the cylinder 11, and a discharge valve 14 is provided on the outer wall of the cylinder 11, respectively. The side opposite to the inner wall of the crank chamber 32 in the longitudinal direction of the cylinder 11 is open, and a crank disk 70 can be detached from the piston 12 by connecting rod 15 at any time through this opening, and is directly attached to the engine output shaft. are connected.

On the other hand, the pressure/mechanical converter 3 also has a cylinder 33, in which a piston 34 is slidably accommodated. Inside the crank chamber 32, a crank 35 for rotating the output shaft 31 is connected to the piston 34 via a connecting rod 36.

Next, the operation will be explained.

During the half cycle of the pressure-mechanical converter 3, the piston 34
slides in the cylinder 33 upward in FIG. 2 as shown by arrow A in FIG. 1. This is good.

The crank 35 is as shown by arrow W in FIG.

Rotate to the left. The output shaft 31 is synchronized with the rotation of the crank 35.
The crank disk 70 also rotates to the left.

As a result, the piston 12 with a reciprocating bong of 7°1.

Cylinder 1 toward the left in Figure 1 as shown by arrow B in the diagram.
Slide inside 1. Therefore, the discharge valve 14 opens and the suction valve 13 closes, and the working fluid in the cylinder 11 is discharged from the discharge port 1.
b and is supplied to the boiler 2 via the discharge pipe 80. This state continues until top dead center is reached.

On the other hand, in the next half cycle from top dead center to bottom dead center, the piston 34 of the pressure/mechanical converter 3.

It slides in the cylinder 33 in the opposite direction to the illustrated arrow A, that is, in the downward direction in the figure. At this time, the crank 35 continues to rotate to the left as shown by the arrow W in FIG. 9, and in synchronization with this, the output shaft 31 and the crank disk 70 also rotate to the left.

As a result, the piston 12 of the reciprocating pump 1.

It slides in the cylinder 11 in the opposite direction to the illustrated arrow B, that is, to the right in the figure. Therefore, the suction valve 13 opens and the discharge valve 14 closes, and the working fluid from the condenser 5 is
It is introduced into the cylinder 11 via the suction pipe 90 and the suction port 1a.

In this way, working fluid from the condenser 5 is supplied to the boiler 2 by the supply pump 1.

The amount of working fluid supplied at this time is 1ξ
It is proportional to the number of rotations of the output shaft of No. 3. Also, supply pump 1
Since the rotational output of the pressure/mechanical converter 3 is directly used as a drive source, the electric motor 6 for driving the supply pump 1 unlike the conventional one is not required, and the loss of one machine is also reduced. Further, the stroke of the piston 12 can be adjusted simply by changing the size of the crank disk 70 and the mounting position of the connecting rod 15 on the crank disk 70. therefore.

- As long as this adjustment can be made optimally, the optimal working fluid supply amount can always be ensured, just like in the past.

There is no need to add complicated means for controlling the amount of working fluid supplied by the supply pump depending on the output state of the pressure/mechanical conversion device.

Note that the second working fluid is of course not limited to water. or,
A condenser is not necessarily required, and the working fluid may be supplied to the boiler from a tank containing one working fluid using a supply pump.

〔Effect of the invention〕

According to one aspect of the present invention, as is clear from the above description.

Since the drive source for the supply pump is taken directly from the rotational output of the pressure/mechanical converter, it is possible to supply working fluid according to the output status of the pressure/mechanical converter.

This has the advantage of being able to provide an external combustion heat engine that is small in size, has a simple configuration, and has little mechanical loss.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing the configuration of an embodiment of an external combustion heat engine according to the present invention, FIG. 2 is a system diagram showing the configuration of a conventional external combustion heat engine, and FIG. 3 is a system diagram showing the configuration of an external combustion heat engine according to the present invention. Yo1... Supply pump (
reciprocating pump), 2...I'm so tired. 3...Pressure/mechanical conversion device, 11...Cylinder, 1
2... Piston, 13... Suction valve, 14... Discharge valve, 15... Connecting rod, 31... Output shaft, 70...
・Removable rank disc. Agent (7783) Patent Attorney Ikeda Point F. Figure 2 Figure 3

Claims (1)

[Claims] 1. In an external combustion heat engine in which a working fluid supplied by a supply pump is heated in a boiler and expanded work is performed by a pressure/mechanical conversion device, the drive section of the supply pump is An external combustion type heat engine, characterized in that it is attached to the output shaft of a pressure/mechanical converter, and the rotational output of the pressure/mechanical converter is used as a direct drive source for the supply pump. 2. The external combustion heat engine according to claim 1, wherein the pressure/mechanical conversion device has a crank chamber, and the supply pump is disposed within the crank chamber. 3. The external combustion heat engine according to claim 1, wherein the supply pump is a reciprocating pump. 4. A crank is attached to the output shaft of the pressure/mechanical conversion device, and the reciprocating pump includes a cylinder, a piston slidably disposed within the cylinder, and provided on one longitudinal side of the cylinder. 4. The external combustion heat engine according to claim 3, further comprising suction and discharge valves, and a connecting rod connecting the piston and the crank on the other longitudinal side of the cylinder.