Stirling heat engine teaching aid based on auxiliary magnetic suspension system and U-shaped liquid column

Abstract

The utility model discloses a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column, which comprises a support table, a glass U-shaped tube and a quartz tube, a high-frequency induction heater is arranged on the upper side of the support table, a heating induction coil of the high-frequency induction heater is sleeved on the quartz tube, the quartz tube is horizontally arranged, and the glass U-shaped tube is arranged on the quartz tube. A first sealing plug and a second sealing plug are respectively plugged at the two ends of the quartz tube, heat preservation steel wool is arranged at one section, close to the first sealing plug, of the interior of the quartz tube, and a heating iron ring is arranged in the center of the interior of the quartz tube and is positioned in a heating induction coil of the high-frequency induction heater. According to the utility model, through the design of the auxiliary magnetic suspension system and the U-shaped liquid column, the friction between the piston and the pipe wall is greatly reduced, the energy loss in the mechanical energy conversion process is effectively reduced, and the working principle of the Stirling heat engine and the application of the second law of thermodynamics can be intuitively displayed.

Description

TECHNICAL FIELD

[0001] The utility model relates to model teaching aid technical field especially relates to a stirling heat engine teaching aid based on auxiliary magnetic suspension system and U type liquid column. BACKGROUND

[0002] The stirling engine model teaching aid is usually composed of a cylinder, a piston, a heat exchanger, a motion mechanism and other key components. These components are carefully designed and assembled to form a complete thermodynamic cycle system. The working principle of the stirling heat engine model teaching aid is based on the stirling cycle, which includes four processes: heating, isochoric expansion, cooling and isochoric compression. These four processes are carried out in the cylinder in turn to form a complete thermodynamic cycle.

[0003] In the teaching process of the second law of thermodynamics, the teacher can vividly demonstrate the application of the second law of thermodynamics through the operation process of the stirling heat engine model teaching aid, helping students understand the basic principles of heat transfer and energy conversion. However, the traditional stirling heat engine model teaching aid has the problem of large frictional wear between the piston and the cylinder wall, resulting in low energy conversion efficiency. INVENTION CONTENTS

[0004] The utility model provides a stirling heat engine teaching aid based on auxiliary magnetic suspension system and U type liquid column to solve the problem proposed in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of based on auxiliary magnetic suspension system and U type liquid column's stirling heat engine teaching aid, including support platform, glass U-shaped tube and quartz tube, the upside of the support platform is equipped with high-frequency induction heating machine, the heating induction coil of high-frequency induction heating machine is sleeved on quartz tube, quartz tube is horizontally arranged, the both ends of quartz tube are respectively plugged with first plugging and second plugging, the inside of quartz tube is equipped with heat resistance steel wool near first plugging, the inside central position of quartz tube is equipped with heating iron ring, heating iron ring is located in the heating induction coil of high-frequency induction heating machine, one end of glass U-shaped tube is plugged with third plugging, second plugging and third plugging are fixedly connected with right-angle communicating pipe, the both ends of right-angle communicating pipe are respectively penetrated second plugging and third plugging, the inside bottom of glass U-shaped tube is equipped with pressure guide liquid, pressure guide liquid is U-shaped column in glass U-shaped tube, the both ends of pressure guide liquid are respectively floated with first floating piston and second floating piston, first floating piston and second floating piston are respectively slidably connected in the both vertical pipes of glass U-shaped tube, the upside of second floating piston is pasted with magnet block, glass U-shaped tube is sleeved with inductance coil, magnet block is located in inductance coil, the bottom side of inductance coil is fixedly connected with fixed magnetic ring through a plurality of second support columns, the opposite side magnetic pole of fixed magnetic ring is same with magnet block, a plurality of first support columns are fixedly connected on the bottom side wall of fixed magnetic ring, inductance coil is electrically connected with oscilloscope.

[0007] Preferably, the heating iron ring is arranged in a triangular ring shape.

[0008] Preferably, the pressure guide liquid is pure water.

[0009] Preferably, the first plugging, the second plugging and the third plugging are made of high-temperature-resistant soft rubber plugs.

[0010] Preferably, the quartz tube is made of high-temperature-resistant quartz glass.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1. Unlike the traditional stirling heat engine model teaching aid, the use of liquid as a supporting medium in the U-shaped liquid column design significantly reduces the friction between the piston and the pipe wall, effectively reducing the energy loss in the mechanical energy conversion process.

[0013] 2. In the auxiliary magnetic suspension system, the interaction between the external magnetic field and the magnet piston allows the auxiliary magnet piston to stably float on the liquid surface. This balance not only maintains the stable suspension of the magnet piston on the liquid surface, but also ensures the smooth reciprocating motion of the piston under the action of the stirling cycle.

[0014] 3, The application can directly show the working principle of Stirling heat engine and the application of the second law of thermodynamics, so that students can directly see the energy conversion in thermodynamics, which can not only help students understand the basic principles of physics, but also stimulate students' interest and curiosity, and expand students' vision and knowledge.

[0015] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following is the preferred embodiment of the utility model and the detailed description of the drawings as follows. The specific implementation of the utility model is given in detail by the following examples and their drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the utility model, constitute a part of the application, the schematic embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0017] Fig. 1 A three-dimensional structure schematic diagram of a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column is proposed for the utility model;

[0018] Fig. 2 A front view cross-sectional structure schematic diagram of a quartz tube in the utility model;

[0019] Fig. 3 A front view cross-sectional structure schematic diagram of a glass U-shaped tube in the utility model.

[0020] In the drawings, the component list represented by each number is as follows:

[0021] 1, first plug; 2, quartz tube; 3, high-frequency induction heating machine; 4, second plug; 5, right-angle communication pipe; 6, third plug; 7, inductance coil; 8, oscilloscope; 9, first support column; 10, fixed magnetic ring; 11, second support column; 12, glass U-shaped tube; 13, support table; 14, heat preservation steel wool; 15, heating iron ring; 16, first driftwood piston; 17, pressure guide liquid; 18, magnet block; 19, second driftwood piston. DETAILED DESCRIPTION

[0022] The principles and characteristics of the utility model are described below in combination with the drawings, the examples are only used to explain the utility model, and are not used to limit the scope of the utility model. In the following paragraphs, the utility model is described in more detail with reference to the drawings. It should be noted that the drawings are greatly simplified and use non-precise proportions, only to facilitate and clearly assist the purpose of explaining the embodiments of the utility model.

[0023] Please refer toFigs. 1-3 The utility model discloses an example of a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column, which comprises a support table 13, a glass U-shaped tube 12 and a quartz tube 2. The quartz tube 2 is arranged horizontally. The glass U-shaped tube 12 and the quartz tube 2 can be clamped and fixed by using an iron stand (not shown in the figure). The quartz tube 2 is made of high-temperature-resistant quartz glass. The upper side of the support table 13 is provided with a high-frequency induction heating machine 3. The heating induction coil of the high-frequency induction heating machine 3 is sleeved on the quartz tube 2. The two ends of the quartz tube 2 are respectively plugged with a first plugging plug 1 and a second plugging plug 4. The inside of the quartz tube 2 near the first plugging plug 1 is provided with heat preservation steel wool 14. The heat preservation steel wool 14 is used for heat preservation of the end of the quartz tube 2 near the first plugging plug 1, so as to avoid large fluctuations in the temperature inside the quartz tube 2. The inside of the quartz tube 2 is provided with a heating iron ring 15 at the central position. The heating iron ring 15 is arranged in a triangular ring shape. The heating iron ring 15 is located in the heating induction coil of the high-frequency induction heating machine 3.

[0024] Please refer to Fig. 3 One end of the glass U-shaped tube 12 is plugged with a third plugging plug 6. The second plugging plug 4 and the third plugging plug 6 are fixedly connected with a right-angle communication tube 5. The two ends of the right-angle communication tube 5 respectively penetrate through the second plugging plug 4 and the third plugging plug 6. The first plugging plug 1, the second plugging plug 4 and the third plugging plug 6 are all made of high-temperature-resistant soft rubber plugs. The inside bottom of the glass U-shaped tube 12 is provided with a pressure guide liquid 17. The pressure guide liquid 17 is pure water. The pressure guide liquid 17 is in a U-shaped column in the glass U-shaped tube 12. The two ends of the pressure guide liquid 17 respectively float with a first floating wood piston 16 and a second floating wood piston 19. The first floating wood piston 16 and the second floating wood piston 19 are respectively slidably connected in the two vertical tubes of the glass U-shaped tube 12. The upper side of the second floating wood piston 19 is fixedly pasted with a magnet block 18. The magnet block 18 is a dysprosium iron boron magnet.

[0025] An inductance coil 7 is sleeved on the glass U-shaped tube 12. The inductance coil 7 is composed of a hollow insulating cylinder on which a wire is wound from one circle to another. The wires are insulated from each other. The magnet block 18 is located in the inductance coil 7. The two ends of the wire of the inductance coil 7 are electrically connected with an oscilloscope 8. The oscilloscope 8 is used for displaying the current change on the inductance coil. The oscilloscope 8 is prior art, and its specific structure will not be described in detail here.

[0026] The bottom side of the inductance coil 7 is fixedly connected with a fixed magnetic ring 10 through a plurality of second supporting columns 11, a plurality of first supporting columns 9 are fixedly connected on the bottom side wall of the fixed magnetic ring 10, the fixed magnetic ring 10 is the same as the opposite side magnetic pole of the magnet block 18, the magnet block 18 can be assisted to realize stable suspension on the second floating wood piston 19 under the interaction between the external magnetic field of the fixed magnetic ring 10 and the magnetic pole of the magnet block 18, dynamic suspension positioning of the magnet block 18 and the second floating wood piston 19 in the glass U-shaped tube 12 is realized, the magnet block 18 and the second floating wood piston 19 embedded in the liquid column are kept in the central position of the U-shaped tube, the sinking of the magnet block 18 and the second floating wood piston 19 in water due to insufficient buoyancy is avoided, and the contact friction between the second floating wood piston 19 and the glass U-shaped tube 12 is greatly reduced.

[0027] The working principle of the utility model is:

[0028] In use, first, the high-frequency induction heating machine 3 is started, the high-frequency induction heating machine 3 can heat the heating iron ring 15 in the quartz tube 2 through a heat induction coil, the heating iron ring 15 can heat the air in the quartz tube 2 after heating, the air in the quartz tube 2 expands, the air pressure increases, the expanded hot air enters the glass U-shaped tube 12 through the right-angle communicating pipe 5 and presses downward the first floating wood piston 16, the first floating wood piston 16 is pressed and can extrude the pressure guide liquid 17 to drive the second floating wood piston 19 at the other end to move upward, then the tube wall between the first floating wood piston 16 and the third blocking plug 6 in the glass U-shaped tube 12 rapidly radiates heat, the expanded hot air in the tube wall shrinks, the air pressure decreases, the first floating wood piston 16 rises back, and the second floating wood piston 19 descends; when the heating iron ring 15 is continuously heated, the above process is repeated, the second floating wood piston 19 moves up and down, and the second floating wood piston 19 moves up and down and can drive the magnet block 18 to cut the magnetic induction line of the inductance coil 7 in the inductance coil 7, so that the inductance coil 7 generates an induced current, the induced current can be displayed on the oscilloscope 8, and students can more directly see the energy conversion in thermodynamics.

[0029] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form; any person skilled in the art can implement the utility model according to the drawings and the above description; however, any equivalent changes, modifications and evolution of the above-mentioned technical contents within the scope of the technical scheme of the utility model are equivalent embodiments of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above-mentioned technical contents within the scope of the technical scheme of the utility model are equivalent embodiments of the utility model.

Claims

1. A Stirling heat engine teaching aid based on an auxiliary magnetic levitation system and a U-shaped liquid column, comprising a support platform (13), a glass U-shaped tube (12), and a quartz tube (2), characterized in that, A high-frequency induction heater (3) is provided on the upper side of the support platform (13). The heating induction coil of the high-frequency induction heater (3) is sleeved on the quartz tube (2). The quartz tube (2) is horizontally arranged. The two ends of the quartz tube (2) are respectively blocked by a first sealing plug (1) and a second sealing plug (4). The inside of the quartz tube (2) near the first sealing plug (1) is provided with heat-insulating steel wool (14). A heating iron ring (15) is provided in the center of the inside of the quartz tube (2). The heating iron ring (15) is located inside the heating induction coil of the high-frequency induction heater (3). One end of the glass U-shaped tube (12) is blocked by a third sealing plug (6). A right-angle connecting pipe (5) is fixedly connected between the second sealing plug (4) and the third sealing plug (6). The two ends of the right-angle connecting pipe (5) pass through the second sealing plug (4) and the third sealing plug (6) respectively. The bottom of the glass U-shaped tube (12) A pressure-conducting fluid (17) is provided, which forms a U-shaped column inside a glass U-tube (12). A first driftwood piston (16) and a second driftwood piston (19) float on both ends of the pressure-conducting fluid (17). The first driftwood piston (16) and the second driftwood piston (19) are slidably connected to the two vertical tubes of the glass U-tube (12). A magnet (18) is attached to the upper side of the second driftwood piston (19). An inductor coil (7) is sleeved on the glass U-tube (12). The magnet (18) is located inside the inductor coil (7). A fixed magnetic ring (10) is fixedly connected to the bottom side of the inductor coil (7) through multiple second support columns (11). The magnetic poles of the fixed magnetic ring (10) and the magnet (18) are the same on the opposite side. Multiple first support columns (9) are fixedly connected to the bottom side wall of the fixed magnetic ring (10). An oscilloscope (8) is electrically connected to the inductor coil (7).

2. The Stirling engine teaching aid based on an auxiliary magnetic levitation system and a U-shaped liquid column according to claim 1, characterized in that, The heating iron ring (15) is arranged in a triangular ring shape.

3. The Stirling engine teaching aid based on an auxiliary magnetic levitation system and a U-shaped liquid column according to claim 1, characterized in that, The pressure-conducting fluid (17) is pure water.

4. The Stirling engine teaching aid based on an auxiliary magnetic levitation system and a U-shaped liquid column according to claim 1, characterized in that, The first sealing plug (1), the second sealing plug (4), and the third sealing plug (6) are all made of high-temperature resistant soft rubber plugs.

5. The Stirling engine teaching aid based on an auxiliary magnetic levitation system and a U-shaped liquid column according to claim 1, characterized in that, The quartz tube (2) is made of high-temperature resistant quartz glass.

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