CN103726948A - Liquid piston hot air engine - Google Patents

Abstract

The invention discloses a liquid piston heat engine, which comprises a first cylinder, a second cylinder, a heater, a heat regenerator, a cooler and a power output pipe. Liquid piston; the heater, regenerator and cooler are connected in sequence, the first cylinder is connected with the heater, and the second cylinder is connected with the cooler; the cooler includes: exposed to air The air-cooling pipeline in the middle; the water-cooling pipeline connected with the air-cooling pipeline; and the water jacket covering the water-cooling pipeline. The liquid piston heat engine of the invention has good cooling effect and stable operation.

Description

liquid piston heat engine

technical field

The present invention relates to a heat engine, in particular to a liquid piston heat engine.

Background technique

A heat engine is a closed-cycle reciprocating piston heat engine with external combustion. It was invented by Stirling in Scotland in 1816, so it is also called a Stirling engine, also known as a heat engine or an external combustion engine. Since the hot air engine avoids the problem of detonation work of the traditional internal combustion engine, low noise, low pollution and low operating cost are realized. The power and efficiency of the hot air machine are not affected by altitude, which is very suitable for use in high altitude areas.

The hot chamber, heater, regenerator, cooler and cold chamber of the hot air machine are connected in sequence to form a gas channel, and the heater is heated by an external heat source so that the gas in the gas channel flows between the cold chamber and the hot chamber. The reciprocating motion between them expands and contracts, and the power output is performed through the transmission mechanism to do work. The pistons used in heat engines are usually solid pistons.

When a solid piston is used in a heat engine, it has the disadvantages of easy wear, high noise and poor sealing performance, complicated processing technology and high cost. The heat engine using a liquid piston is still in the research stage.

The publication number is CN103321775A (hereinafter referred to as document 1), and the Chinese invention patent titled "Boiler and its liquid piston heat engine" discloses a liquid piston heat engine, as shown in Figure 1 (that is, Figure 2 in Document 1, remove 12), which includes a first cylinder 15, a second cylinder 13, a heater 16, a regenerator 17 and a cooler 11, and the first cylinder 15 and the second cylinder 13 have a bottom communication The liquid piston; the heater 16, the regenerator 17 and the cooler 11 are connected in turn, the first cylinder 15 is connected with the heater 16, and the second cylinder 13 is connected with the cooler 11; the power output pipe 19 of the liquid piston heat engine The first end has a power output port, stretches into the first cylinder 15 or is connected to the bottom of the first cylinder 15, so as to output a reciprocating power outwards through the second end of the power output pipe 19, for example, through the valve body 10 outwards Output a reciprocating power.

The liquid piston heater in Document 1 has the advantages of low noise, good sealing, no wearing parts, no daily maintenance, simple processing technology, and low cost. The heat engine of the liquid piston has been researched and has entered the application stage.

However, in the liquid piston heat engine of Document 1, the cooler 11 needs to be cooled by cooling water, and the liquid outlet of the cooler 11 is connected to the water circulation system of the boiler to provide cooling for the cooler 11 by using the return water of the water circulation system of the boiler. water. At the initial stage of boiler operation, the cooling effect of the cooler 11 is better due to the low return water temperature of the boiler; after the boiler has been in operation for a period of time, as the return water temperature rises, it will be much higher than room temperature, which will reduce the cooling effect of the cooler 11. The cooling effect will affect the stability and power of the heat engine.

In order to overcome this problem, the approach that can be taken is to supplement the cooling water in the cooler 11 from outside the water circulation system of the boiler, which can improve the cooling effect of the cooler 11, but it will increase the expenditure of water charges, which is very precious in water resources. At the moment, such a treatment seems not worth the candle.

Contents of the invention

In view of the problems existing in the prior art, the purpose of the present invention is to provide a liquid piston heat engine with good cooling effect, stable operation, water saving and environmental protection.

In order to achieve the above object, the technical scheme of the present invention is as follows:

A liquid piston heat engine, comprising a first cylinder, a second cylinder, a heater, a regenerator, a cooler and a power output pipe, wherein the first cylinder and the second cylinder have a liquid piston connected to the bottom; the The heater, regenerator and cooler are connected in sequence, the first cylinder is connected with the heater, and the second cylinder is connected with the cooler; the cooler includes: an air-cooled tube exposed to the air road; a water-cooling pipeline connected to the air-cooling pipeline; and a water jacket covering the water-cooling pipeline.

The beneficial effects of the present invention are: the liquid piston heat engine of the present invention maintains the low noise of the existing liquid piston heat engine, good sealing performance, no wearing parts, no daily maintenance, simple processing technology, low cost, etc. advantage. Moreover, the cooling effect of the cooler is enhanced, so that the operating condition of the entire heating machine is better, the operating efficiency is higher, and the purpose of water saving and environmental protection is achieved.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a liquid piston heat engine in the prior art.

Fig. 2 is a perspective view of a liquid piston heat engine according to the first embodiment of the present invention.

Fig. 3 is a schematic cross-sectional front view of the liquid piston heat engine according to the first embodiment of the present invention.

Fig. 4 is a perspective view of a liquid piston heat engine according to a second embodiment of the present invention.

Fig. 5 is a schematic front view of a liquid piston heat engine according to a second embodiment of the present invention.

Fig. 6 is a front sectional schematic diagram of a liquid piston heat engine according to a second embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be pointed out that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The liquid piston heat engine of the present invention is not limited to be used in boilers, and can also be applied to other occasions that require reciprocating power, such as providing power for linear generators.

The liquid piston heat engine of two embodiments of the present invention will be introduced in detail below. For the liquid piston heat engine of the embodiment of the present invention, the components not described below can all use the same components in Document 1, and will not be repeated here.

1. The liquid piston heat engine of the first embodiment

As shown in Figures 2 and 3, the liquid piston heat engine of the first embodiment of the present invention mainly includes a first cylinder 15, a second cylinder 13, a heater 16, a regenerator 17, a cooler, and a power output pipe 19, etc. The main components.

Wherein, the cooler includes a water cooling pipeline 14 , an air cooling pipeline 12 and a water jacket 11 . Wherein, the water jacket 11 and the water cooling pipeline 14 may be collectively referred to as a water cooling device. The air-cooled pipeline 12 is directly exposed to the outside air for cooling; while the water-cooled pipeline 14 is cooled by the cooling water in the water jacket 11 covering the water-cooled pipeline 14 .

Generally speaking, the heater 16, the regenerator 17, the water-cooling pipeline 11 and the air-cooling pipeline 12 are connected in sequence, wherein the shell of the regenerator 17 is connected to the water jacket 11 through a flange 170, and the flange 170 In the cavity, the water cooling pipeline 14 is in gas communication with the regenerator 17. And the first cylinder 15 links to each other with the heater 16, because the shape of the main body of the first cylinder 15 is a cylinder, and the heater 16 is the shape of two rows of a plurality of heating tubes, therefore, in the present embodiment, the top of the first cylinder 15 The cross-section of the heater 16 gradually changes to adapt to the cross-sectional shape of the heater 16. The second cylinder 13 is connected to the end of the air cooling pipeline 12 through a flange 130 .

The first cylinder 15 is connected to the second cylinder 13 through a flange 150 , and the first cylinder 15 and the second cylinder 13 have liquid pistons in fluid communication. In the working state, the above-mentioned heater 16, regenerator 17 and cooler have enclosed gas as a working medium. The airtight gas is air filled at normal pressure or pressurized. When the operating temperature of the heat engine is high, the airtight gas is preferably hydrogen, helium and nitrogen, so as to avoid the oxygen in the air from interfering with the first cylinder 15 and the second cylinder 13. The liquid inside the liquid piston reacts chemically.

The first cylinder 15 may be referred to as a hot cylinder, while the second cylinder 13 may be referred to as a cold cylinder. The highest liquid level in the first cylinder 15 and the second cylinder 13 is the top of each cylinder, and the lowest is the upper edge position of the power output port 19 .

The cooler of the liquid piston heat engine of the embodiment of the present invention is introduced in detail below:

The water-cooling pipeline 14 includes a plurality of central tubes, which are divided into two sections, an upper section 143 and a lower section 142, and the central tubes of the upper section 143 are arranged in a single row to facilitate heat dissipation. The lower section 142 is evenly distributed in a circle to facilitate connection with the regenerator 17; therefore, the water-cooling pipeline 14 as a whole presents a transition from being evenly distributed in a circle to a single row of multiple lines. Adapting to the shape transition of the water-cooling pipeline 14, the cross-section of the water jacket 11 transitions from a circle to a rectangle, which can be realized by deforming one end of a round tube into a square tube during manufacture. In addition, the arrangement of the central tubes in the upper section 143 may also be a double-row multi-tube structure or a flat and wide multi-row structure with multiple rows and multiple tubes.

The bottom of the water jacket 11 has a water inlet 110 , and the top of the water jacket 14 has a water outlet 111 . Since the cooling water runs from bottom to top, a power is needed. The water inlet 110 can be connected to a branch of the power output pipe 109 when the power output pipe 109 is not affected to connect to other equipment, so that the power output pipe 109 provides power for cooling water circulation in the water jacket 11 .

The air-cooled pipeline 12 includes a circular arc section 121, a cooling section 122 and a transition section 123, wherein the circular arc section 121 is connected to the upper section 113 of the water-cooling pipeline 14, and the cooling section 122 and the circular arc section 121 are all single-row multiple The only difference is the shape, the cooling section 122 is a straight tube, and the shape of the transition section 123 is evenly distributed in a circle so as to be connected with the top of the second piston 13 . The air-cooling pipeline 12 also adopts the form of a plurality of central tubes, in order to increase the heat dissipation area and improve the cooling effect.

Two, the liquid piston heat engine of the second embodiment

The difference between the liquid piston heat engine of this embodiment and the first embodiment is that, as shown in FIGS. 4-6 , the water jacket 11 is cylindrical, which is convenient for mass production. The water-cooling pipeline 14 can either adopt the same form as that of the first embodiment, or can adopt an arrangement of central tubes that are evenly distributed in a circle from top to bottom, as shown in FIG. 6 .

The liquid piston heat engine of the above two embodiments of the present invention can provide power to the linear generator, and can connect the hydraulic cylinder through the power output pipe 19, and connect the linear generator through the piston of the hydraulic cylinder. The piston in the hydraulic cylinder here needs to be solid The piston, that is, the liquid piston heat engine of this embodiment provides reciprocating power for the linear generator to make the linear generator generate electricity. A diaphragm pump can also be arranged at the end of the power output pipe 19 to be connected to a linear generator, so as to provide reciprocating power for the linear generator to make the linear generator generate electricity.

The embodiments described herein so far should be understood as explanations of the present invention rather than limitations of the present invention. The scope of the present invention is defined not by the above description but by the patent claims, and the present invention is intended to include all modifications equivalent to the meaning and scope of the patent claims.

Claims (10)

1. a liquid piston heat engine, comprises the first cylinder, the second cylinder, heater, regenerator, cooler and power output tube, has the liquid piston being communicated with for bottom in described the first cylinder and the second cylinder; Described heater, regenerator and cooler are connected successively, and described the first cylinder is connected with described heater, and described the second cylinder is connected with described cooler; It is characterized in that, described cooler comprises:

Be exposed to airborne air-cooled pipeline;

The water-cooled pipeline being connected with described air-cooled pipeline; And

The water jacket of coated described water-cooled pipeline.

2. liquid piston heat engine as claimed in claim 1, is characterized in that, described power output tube has first end and the second end, and described first end is connected in described the first cylinder, and described power output tube is by the outwards reciprocal power of output one of described the second end.

3. liquid piston heat engine as claimed in claim 1, it is characterized in that, one end that the non-and described air-cooled pipeline of described water-cooled pipeline is connected is connected in described regenerator, and one end that the non-and described water-cooled pipeline of described air-cooled pipeline is connected is connected in described the second cylinder.

4. liquid piston heat engine as claimed in claim 2, is characterized in that, the bottom of described water jacket has water intake, and the top of described water jacket has water outlet.

5. liquid piston heat engine as claimed in claim 4, is characterized in that, described water jacket is cylindric.

6. liquid piston heat engine as claimed in claim 2, is characterized in that, the cross section of described water jacket is circular, and described water-cooled pipeline comprises many center tubes, and many described center tubes are by being uniformly distributed in a circle.

7. liquid piston heat engine as claimed in claim 2, it is characterized in that, the cross section of described water jacket is by circle to rectangle transition, and described water-cooled pipeline comprises many center tubes, and many described center tubes are by the arrangement mode transition that is evenly distributed to single many in a circle.

8. liquid piston heat engine as claimed in claim 6, is characterized in that, described air-cooled pipeline comprise the arc section that is connected with described water-cooled pipeline, single many radiating segment and one circular in equally distributed changeover portion.

9. liquid piston heat engine as claimed in claim 6, is characterized in that, described air-cooled pipeline comprises the arc section that is connected with described water-cooled pipeline, arrange more the radiating segment of many and one circular in equally distributed changeover portion.

10. liquid piston heat engine as claimed in claim 4, is characterized in that, described water intake is connected with described power output tube, so that the power of the cooling water circulation in described water jacket to be provided by described power output tube.

Images