CN102536508A

CN102536508A - Stirling engine

Info

Publication number: CN102536508A
Application number: CN2012100515206A
Authority: CN
Inventors: 杨中华
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2012-07-04

Abstract

The invention relates to an external heating type engine, particularly to a Stirling engine, wherein the engine takes a horizontal shaft as the center; a plurality of working substance cavities are symmetrically arranged in the radial direction of the shaft in a radial manner; working substances in the working substance cavities adopt diaphragms for sealing; and the plurality of working substance cavities form an annual housing. An inner housing body and an outer housing body of the engine as well as the diaphragms form a hermetically sealed annual fluid cavity filled with fluid. As the engine takes the shaft as the center, when temperature difference does not exist between both sides in the radial direction, the working substances in all working substance cavities realize pressure balance through fluid; the fluid is uniformly distributed; both the gravity center and the shaft center of the engine are coincided in a static balance state and motionless manner; when temperature difference exists between both sides in the radial direction, the working substances in the high temperature side working substance cavities absorb heat to inflate, thereby driving the fluid flow towards the low temperature side, changing the shape of the fluid cavities and the distribution of the fluid, enabling the whole gravity center of the engine to displace, and producing gravity linear eccentricity; the engine rotates under the action of the gravity and taking a shaft as the center, so that the new low temperature substance cavities are brought into the high temperature side for heating and inflating, and the high temperature substance cavities are brought into the low temperature side for cooling and contracting; and further, the existence of the gravity linear eccentricity is maintained, the rotation of the engine is maintained, and the load is driven.

Description

Stirling engine

Technical field

The present invention relates to a kind of external heating motor, especially a kind of Stirling engine, simple in structure; Do not have to-and-fro motion mechanical structure, working medium adopts diaphragm seal, in the engine revolution; Working medium is exported the existence of keeping the gravity throw of eccentric through the Stirling thermodynamic cycle, realizes the power output of motor.

Background technique

At present, known external heating motor is representative with the Stirling engine.The outer hot machine of Stirling circuit is equivalent to the hot machine of Carnot's cycle.Various Stirling engine structural designs are shown in various documents and materials, such as patent documentation 01810065.1,02119293.6,00809060.2,00808603.6, etc.We can see from these documents, in order to realize the Stirling thermodynamic cycle, extensively adopt crank, connecting rod, and piston, cam, mechanical components such as cylinder cause complex structure, and mechanical loss is big, lubricated difficulty, problems such as working medium sealing difficulty.。

Summary of the invention

For addressing the above problem; The present invention has given a kind of new technological scheme, and working medium adopts diaphragm seal in working fluid chamber, and the working fluid chamber motion changes the position and realizes that the thermomechanics of working medium changes; Working medium is done the motion that the thermodynamic cycle output work is kept working fluid chamber, and output mechanical energy.

The technical solution adopted for the present invention to solve the technical problems is: motor is the center with the axle of horizontal positioned, and the diameter of axle is to several working fluid chamber of radial symmetric arrangement, and working medium adopts diaphragm seal in the working fluid chamber, is filled with in each chamber with amount, the working medium of homogeneity.Several working fluid chambers are formed annular frame, are working medium heat absorption conductive face, adopt Heat Conduction Material to process, and barrier film adopts the high-temperature flexible material, can change shape with the variation of working medium volume.The motor inner housing, frame and barrier film form the ring-shaped liquid chamber of a sealing, and full of liquid in the chamber, barrier film play the isolation of liquid and working medium simultaneously.Motor is when radially both sides do not have the temperature difference at the center with the axle, and working medium realizes pressure balance through liquid in each working medium cabin, and liquid distribution is balanced, and motor center of gravity and axis coinciding are the static balancing state, does not have motion.When radially there was the temperature difference both sides, the heat absorption of high temperature side working fluid chamber working medium was expanded, and promoted liquid and flowed to low temperature side; Change liquid container shape and liquid distribution, make the whole centre-of gravity shift of motor, produce the gravity throw of eccentric; Motor is the center rotation with the axle under action of gravity, brings new cryogenic fluid chamber into high temperature side and adds thermal expansion, brings the high temperature refrigerant chamber into the low temperature side cooling and shrinks; Keep the existence of gravity throw of eccentric, keep the rotation of motor, and drive load.

The beneficial effect that the present invention obtains is that working medium adopts diaphragm seal in working fluid chamber, and the working medium sealing is reliable, and power adopts liquid transfer, does not have to-and-fro motion mechanical structure, does not have mechanical frictional loss, and engine interior need not lubricate, and is simple in structure.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a running state schematic representation of the present invention.

1. framies among the figure, 2. barrier film, 3. spool, 4. inner housing, 5. working fluid chamber, 6. liquid container, 7. disc, 8. thermal source, 9. shaft centre line, 10. center of gravity, 11. low-temperature receivers.

Embodiment

In Fig. 1, frame 1 is formed the working fluid chamber 5 that several independent seals with barrier film 2, and frame 1 and barrier film 2 and inner housing 4 are formed the liquid container 6 of ring packing, and axle 3 passes through disc 7 and links to each other with inner housing 4.

In operation schematic representation shown in Figure 2; Working medium expanded by heating in the working fluid chamber 5 of motor thermal source 8 sides; The working medium cooling is shunk in the working fluid chamber 5 of motor low-temperature receiver 11 sides, and liquid container 6 intracavity liquids compile to motor low-temperature receiver 11 sides, cause motor center of gravity 10 off-axis center lines 9; Form the gravity throw of eccentric, engine revolution.In the rotary course, when the working fluid chamber 5 that constantly will cool off is brought the heating of thermal source 8 sides into, bring the working fluid chamber that adds thermal expansion 5 cooling of into low-temperature receiver 11 sides, keep the existence of gravity throw of eccentric, keep engine revolution.

As shown in Figure 2, the working fluid chamber 5 of axis below rotates through supercooling and contraction heat source 8 directions, begins heat absorption; Because the liquid that working fluid chamber 5 tops are compiled is more, under the centrifugal action that the liquid circular movement produces, it is big that working medium is born pressure; The working medium swell increment is little, approximate constant volume heating process; In the movement process that makes progress, working medium continues heat absorption and expands, and the liquid that working fluid chamber 5 tops are compiled is progressively being squeezed; The working medium swelling pressure are also reducing, when working fluid chamber 5 when tip position will leave thermal source 8, working fluid chamber 5 volumetric expansions are to maximum; Barrier film 2 only bears the centrifugal force that small amount of liquid produces and the pressure that forms, and in whole heating process, working medium expands while absorbing heat; The swelling pressure constantly reduce, approximate isothermal expansion process; When working fluid chamber 5 during near low-temperature receiver 11, begins heat radiation at tip position, because the pressure ratio of bearing is lower, working fluid chamber 5 volume contour projector are little, approximate constant volume heat radiation process; Along with working fluid chamber 5 rotates, continue cooling, contour projector progressively increases; The space is occupied by liquid, and the pressure that bears also increases, in the time of below running to, will leaving low-temperature receiver 11; Working fluid chamber 5 volume shrinkages are to minimum, and the liquid that the top is compiled is maximum, and the centrifugal force that liquid produces is maximum; The pressure that working medium is born in the working fluid chamber 5 is maximum, approximate isothermal radiation process.A working fluid chamber in the engine revolution process in one week, has experienced four processes, i.e. constant volume heating, isothermal expansion, constant volume heat radiation, isothermal compression, a complete Stirling circulation.

The Stirling engine available solar energy heat build-up of foregoing invention drives and drives generator for electricity generation, or obtains heat energy through method such as burn away the refuse and drive engine running, is widely used.

Undoubtedly, Stirling engine of the present invention also has multiple conversion and remodeling, is not limited in the concrete structure of above-mentioned mode of execution, as working fluid chamber number and shape, the structure of inner housing and frame, the shape of liquid container and layout or the like.In a word, which conspicuous to those skilled in the art conversion is protection scope of the present invention should comprise or substitute and transform.

Claims

1. Stirling engine; Adopt gaseous working medium, it is characterized in that: the diameter of axle is arranged separate working fluid chamber symmetrically and evenly to radial, and working fluid chamber is formed by engine housing body and diaphragm seal; Barrier film and motor inner housing and frame form a hermetic cavity, full of liquid in the chamber.

2. Stirling engine according to claim 1 is characterized in that: frame adopts Heat Conduction Material to process.

3. Stirling engine according to claim 1 is characterized in that: barrier film can be along with sealing working medium change in volume generation deformation.

4. Stirling engine according to claim 1 is characterized in that: the working medium homogeneity equivalent of filling in each working fluid chamber.

5. Stirling engine according to claim 1 is characterized in that: the structure of liquid container is the closed ring structure.

6. Stirling engine according to claim 1 is characterized in that: all barrier film one sides contact with the interior working medium of each working fluid chamber, and opposite side contacts with the liquid intracavity liquid.

7. Stirling engine according to claim 1 is characterized in that: the engine shaft horizontal arrangement.