Low-cost high-temperature heat pipe and Stirling coupled engine device
By designing a coupling structure between low-cost high-temperature heat pipe and expansion chamber in the Stirling engine, the problems of manufacturing cost and output power limit of the existing Stirling engine are solved, and efficient thermal energy conversion and mechanical energy output are achieved.
Patent Information
- Application Number
- CN202421628530.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-10
AI Technical Summary
Due to the limitations of manufacturing costs and output power, the existing Sterling engines are difficult to develop stably and rapidly.
An engine device coupled with low-cost high-temperature heat pipe and Stirling is designed. By setting up a high-temperature heat pipe and expansion chamber, the heated expansion medium drives the displacement device and flywheel to rotate to achieve the output of mechanical energy.
The device significantly reduces manufacturing costs through the use of internal combustion engine accessories, achieving efficient conversion of high-temperature thermal energy and stable output of mechanical energy.
Smart Images
Figure CN222797594U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of Stirling engines, in particular to an engine device of low-cost high-temperature heat pipe and Stirling coupling. Background Art
[0002] A Stirling engine is a device that converts thermal energy into mechanical energy. It requires heat exchange to cause changes in internal pressure and volume. A Stirling engine is an external combustion engine that uses the sealed working fluid (helium, hydrogen, etc.) in the cylinder to generate pressure changes and output kinetic energy by heating and cooling from the outside. This engine is similar to a steam engine, but the working fluid is not a two-phase fluid but a single-phase gas.
[0003] So far, the output power of the Stirling engine developed has reached several hundred kilowatts. In this range of output power, Stirling has a clear advantage over other engines in terms of thermal efficiency. However, due to the output power per unit volume and manufacturing cost issues, Stirling was neglected in the early stages of development due to the rapid development of internal combustion engines, and this situation has not been broken to this day. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies of the prior art, the utility model provides a low-cost high-temperature heat pipe and Stirling coupled engine device, which solves the problem that the existing Stirling engine is difficult to develop stably and rapidly due to the limitations of manufacturing cost and output power.
[0006] (II) Technical solution
[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0008] A low-cost high-temperature heat pipe and Stirling coupled engine device comprises an assembly base and an expansion chamber arranged on the base, wherein a plurality of high-temperature heat pipes are fixedly inserted into the expansion chamber, the expansion chamber is filled with a heat expansion medium, a displacer is movably connected in the expansion chamber, a displacer connecting rod is rotatably connected to the displacer, an end of the displacer connecting rod away from the displacer is drivingly connected to a displacer crankshaft, an inertia flywheel and an output crankshaft are respectively installed at both ends of the displacer crankshaft, a moving piston cylinder is fixedly connected to the assembly base, a heat dissipation fin is fixedly arranged on the outside of the moving piston cylinder, a moving piston is slidably connected in the moving piston cylinder, the moving piston is drivingly connected to the output crankshaft via a moving piston connecting rod, and the lower part of the moving piston cylinder is communicated with the expansion chamber.
[0009] Preferably, a heat storage ceramic regenerator is fixedly arranged in the expansion chamber, and the heat storage ceramic regenerator is evenly provided with through holes along the vertical direction.
[0010] Preferably, a heat regenerator fixing ring is fixedly connected to the lower end surface of the assembly base, and air holes are arranged in a ring on the heat regenerator fixing ring. The air holes are connected to the through holes, and the displacer is slidably arranged in the inner cavity of the heat regenerator fixing ring.
[0011] Preferably, the inner cavity of the assembly base is provided with an air injection channel, the air injection channel connects the moving piston cylinder and the expansion chamber, and the air injection channel is in a sealed and blocked state at both ends under normal conditions.
[0012] Preferably, a sealing sleeve is provided between the displacer connecting rod and the assembly base, and the sealing sleeve is fixedly connected to the assembly base.
[0013] Preferably, a flywheel support seat is fixedly provided on the assembly base, and the flywheel support seat is rotationally connected to the displacer crankshaft. A bearing fixing base is fixedly connected to the moving piston cylinder, and the bearing fixing base is rotationally connected to the output crankshaft through a bearing. Fan blades are provided on the side of the inertial flywheel close to the moving piston cylinder, and during the rotation of the inertial flywheel, the fan blades can blow air in the direction of the moving piston cylinder.
[0014] (III) Beneficial effects
[0015] The utility model has the following beneficial effects:
[0016] The low-cost high-temperature heat pipe and Stirling coupled engine device, through the high-temperature heat pipe and expansion chamber, when the high-temperature heat pipe is heated, the end of the high-temperature heat pipe extending into the expansion chamber heats the heated expansion medium therein, thereby driving the displacer and the displacer connecting rod to move upward, thereby driving the displacer crankshaft and the inertia flywheel to rotate; when the displacer crankshaft moves to the highest point, the inertia flywheel drives the displacer crankshaft to rotate continuously and returns to the lowest point, thereby causing the displacer connecting rod to drive the displacer to move downward in the return stroke, squeezing the heated expansion medium in the expansion chamber, thereby causing the heated expansion medium to enter the moving piston cylinder. At this time, since the temperature of the moving piston cylinder is low and heat dissipation fins are provided on the outside, the high-temperature medium entering the running piston cylinder is quickly cooled. At this time, due to thermal expansion and contraction, the moving piston in the moving piston cylinder is sucked downward, thereby driving the output crankshaft and the displacer crankshaft connected to the output crankshaft to rotate in the return stroke. The cooled medium is squeezed by the moving piston and flows back into the expansion chamber, and is heated and expanded again by the high-temperature heat pipe, thereby driving the displacer to move upward again, thereby causing the displacer crankshaft and the output crankshaft to rotate continuously and stably. The device can be composed of a large number of internal combustion engine accessories, which greatly reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of the main view of the utility model;
[0018] Figure 2 This is a schematic diagram of the split structure of the utility model from the first perspective;
[0019] Figure 3 It is a partial cutaway schematic diagram of the entire utility model;
[0020] Figure 4 This is a schematic diagram of the split structure of the utility model from the second viewing angle.
[0021] In the figure: 1. assembly base; 2. expansion chamber; 3. heat storage ceramic regenerator; 31. through hole; 4. displacer; 5. regenerator fixing ring; 51. air vent; 6. high-temperature heat pipe; 7. gas injection channel; 8. displacer connecting rod; 9. sealing sleeve; 10. displacer crankshaft; 11. inertial flywheel; 12. flywheel support seat; 13. moving piston cylinder; 14. moving piston; 15. moving piston connecting rod; 16. bearing fixing base; 17. output crankshaft; 18. fan blades. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] See also Figure 1 The utility model provides a technical solution: a low-cost high-temperature heat pipe 6 and Stirling coupled engine device, comprising an assembly base 1 and an expansion chamber 2 arranged on the base, a plurality of high-temperature heat pipes 6 are fixedly inserted in the expansion chamber 2, the expansion chamber 2 is filled with a heat expansion medium, a displacer 4 is movably connected in the expansion chamber 2, a displacer connecting rod 8 is rotatably connected to the displacer 4, an end of the displacer connecting rod 8 away from the displacer 4 is transmission-connected to a displacer crankshaft 10, an inertia flywheel 11 and an output crankshaft 17 are respectively installed at both ends of the displacer crankshaft 10, a moving piston cylinder 13 is fixedly connected to the assembly base 1, a heat dissipation fin is fixedly arranged on the outside of the moving piston cylinder 13, a moving piston 14 is slidably connected in the moving piston cylinder 13, the moving piston 14 is transmission-connected to the output crankshaft 17 through a moving piston connecting rod 15, and the lower part of the moving piston cylinder 13 is communicated with the expansion chamber 2.
[0024] The utility model is provided with a high-temperature heat pipe 6 and an expansion chamber 2, so that when the high-temperature heat pipe 6 is heated, the end of the high-temperature heat pipe 6 extending into the expansion chamber 2 heats the heated expansion medium therein, thereby driving the displacer 4 and the displacer connecting rod 8 to move upward, thereby driving the displacer crankshaft 10 and the inertia flywheel 11 to rotate; when the displacer crankshaft 10 moves to the highest point, the inertia flywheel 11 drives the displacer crankshaft 10 to rotate continuously and returns to the lowest point, thereby causing the displacer connecting rod 8 to drive the displacer 4 to move downward in the return stroke, squeezing the heated expansion medium in the expansion chamber 2, thereby causing the heated expansion medium to enter the moving piston cylinder 13. At this time, since the moving piston cylinder 13 has a low temperature and is provided with heat dissipation fins on the outside, the high-temperature medium entering the operating piston cylinder is quickly cooled. At this time, due to thermal expansion and contraction, the moving piston 14 in the moving piston cylinder 13 is sucked and moves downward, thereby driving the output crankshaft 17 and the displacer crankshaft 10 connected to the output crankshaft 17 to rotate in the return stroke. The cooled medium is squeezed by the moving piston 14 and flows back into the expansion chamber 2, where it is heated and expanded again by the high-temperature heat pipe 6, and then drives the displacer 4 to move upward again, thereby causing the displacer crankshaft 10 and the output crankshaft 17 to rotate continuously and stably. Compared with Stirling engines with the same power parameters at home and abroad, the biggest feature of this device is that it uses a large number of internal combustion engine parts in stock at home, which greatly reduces the manufacturing cost. According to calculations, the manufacturing cost of the equipment is less than 10,000 yuan, and the manufacturing cost per kilowatt is about 1,000 yuan. Considering its special application scenarios in the field of environmental protection, it already has good commercial application value.
[0025] Reference Figure 3 and 4 As shown, in this embodiment, a heat storage ceramic regenerator 3 is fixedly arranged in the expansion chamber 2, and the heat storage ceramic regenerator 3 is evenly provided with through holes 31 along the vertical direction. The heat storage ceramic regenerator 3 is arranged to store the heat in the expansion chamber 2, so that the medium reflowing after cooling can be preheated when it contacts the heat storage ceramic regenerator 3, so that the subsequent high-temperature heat pipe 6 can quickly heat and raise the temperature of the reflowing medium, thereby improving the heat transfer efficiency.
[0026] Reference Figure 2 and 3 As shown, in this embodiment, the lower end surface of the assembly base 1 is fixedly connected to a regenerator fixing ring 5, and the regenerator fixing ring 5 is provided with air holes 51 in an annular manner, and the air holes 51 are connected to the through holes 31, and the displacer 4 is slidably arranged in the inner cavity of the regenerator fixing ring 5. By setting the regenerator fixing ring 5 with air holes 51 on the top, the regenerator space can be effectively increased, the heat recovery efficiency can be increased, and the interference problem between the regenerator fixing ring 5 and the heat storage ceramic regenerator 3 in space can be solved.
[0027] Reference Figure 3As shown, in this embodiment, the inner cavity of the assembly base 1 is provided with an injection channel 7, which connects the moving piston cylinder 13 and the expansion chamber 2. The injection channel 7 is in a sealed and blocked state at both ends under normal conditions. The injection channel 7 is provided to facilitate the connection between the moving piston cylinder 13 and the expansion chamber 2, thereby facilitating the flow of the heat expansion medium; at the same time, the heat expansion medium may leak over time, and can be added and injected into the expansion chamber 2 through the injection channel 7.
[0028] Reference Figure 3 As shown, in this embodiment, a sealing sleeve 9 is provided between the displacer connecting rod 8 and the assembly base 1, and the sealing sleeve 9 is fixedly connected to the assembly base 1. The sealing sleeve 9 is provided to ensure the sealing performance between the displacer connecting rod 8, the assembly base 1 and the gas injection channel 7, so as to prevent the thermal expansion medium from leaking therefrom.
[0029] Reference Figure 2 and 3 As shown, in this embodiment, a flywheel support seat 12 is fixedly arranged on the assembly base 1, and the flywheel support seat 12 is rotatably connected to the displacer crankshaft 10. A bearing fixing base 16 is fixedly connected to the moving piston cylinder 13, and the bearing fixing base 16 is rotatably connected to the output crankshaft 17 through a bearing. A fan blade 18 is arranged on the side of the inertial flywheel 11 close to the moving piston cylinder 13, and during the rotation of the inertial flywheel 11, the fan blade 18 can blow air toward the moving piston cylinder 13. By arranging the fan blade 18 on the inertial flywheel 11, when the inertial flywheel rotates normally, the fan blade 18 can blow air toward the moving piston cylinder 13, thereby accelerating the heat dissipation of the heat dissipation fins on the moving piston cylinder 13.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A low-cost high-temperature heat pipe and Stirling coupled engine device, comprising an assembly base and an expansion chamber arranged on the base, characterized in that: A plurality of high-temperature heat pipes are fixedly inserted into the expansion chamber, the expansion chamber is filled with a heated expansion medium, a displacer is movably connected to the expansion chamber, a displacer connecting rod is rotatably connected to the displacer, an end of the displacer connecting rod away from the displacer is transmission-connected to the displacer crankshaft, an inertia flywheel and an output crankshaft are respectively installed at two ends of the displacer crankshaft, a moving piston cylinder is fixedly connected to the assembly base, a heat dissipation fin is fixedly provided on the outside of the moving piston cylinder, a moving piston is slidably connected to the moving piston cylinder, the moving piston is transmission-connected to the output crankshaft via a moving piston connecting rod, and the lower part of the moving piston cylinder is communicated with the expansion chamber.
2. A low-cost high-temperature heat pipe and Stirling coupled engine device according to claim 1, characterized in that: A heat storage ceramic regenerator is fixedly arranged in the expansion cavity, and the heat storage ceramic regenerator is evenly provided with through holes along the vertical direction.
3. A low-cost high-temperature heat pipe and Stirling coupled engine device according to claim 2, characterized in that: The lower end surface of the assembly base is fixedly connected with a heat regenerator fixing ring, and the heat regenerator fixing ring is annularly arranged with air holes, the air holes are connected with the through holes, and the displacer is slidably arranged in the inner cavity of the heat regenerator fixing ring.
4. A low-cost high-temperature heat pipe and Stirling coupled engine device according to claim 3, characterized in that: The inner cavity of the assembly base is provided with an air injection channel, the air injection channel is connected with the moving piston cylinder and the expansion chamber, and the air injection channel is in a sealed and blocked state at both ends under normal conditions.
5. A low-cost high-temperature heat pipe and Stirling coupled engine device according to claim 4, characterized in that: A sealing sleeve is arranged between the displacer connecting rod and the assembly base, and the sealing sleeve is fixedly connected to the assembly base.
6. A low-cost high-temperature heat pipe and Stirling coupled engine device according to claim 5, characterized in that: A flywheel support seat is fixedly arranged on the assembly base, and the flywheel support seat is rotationally connected to the displacer crankshaft. A bearing fixing base is fixedly connected to the moving piston cylinder, and the bearing fixing base is rotationally connected to the output crankshaft through a bearing. Fan blades are arranged on the side of the inertial flywheel close to the moving piston cylinder, and during the rotation of the inertial flywheel, the fan blades can blow air toward the moving piston cylinder.