Free piston Stirling generator with coaxial debugging device and debugging method thereof

Abstract

A free piston Stirling generator with a coaxial debugging device and a debugging method thereof, the debugging method comprising: adjusting the interval N Set the power piston leaf spring fixing screw to a specific tightness; stimulate the first linear motor mover to make the power piston vibrate up and down; adjust the power piston leaf spring adjusting screw to make the power piston leaf spring produce a slight lateral movement; use the remaining N The power piston leaf spring is fixed completely; adjust the interval N Set the fixing screws of the valve piston leaf spring to a specific tightness; stimulate the second linear motor mover to make the valve piston vibrate up and down; adjust the valve piston leaf spring adjusting screw to make the valve piston leaf spring produce a slight lateral movement; use the remaining N The gas distribution piston leaf spring is completely fixed by the gas distribution piston leaf spring. The present invention can dynamically compensate for the axis deviation of the piston and the cylinder during the debugging process, thereby realizing frictionless coaxial debugging.

Description

Technical Field

[0001] The invention relates to a free piston Stirling generator, in particular to a free piston Stirling generator with a coaxial debugging device and a debugging method thereof. Background Art

[0002] As a highly efficient heat-to-electricity conversion device, the Stirling generator is widely used in spacecraft power systems, military equipment, and industrial waste heat recovery due to its high reliability, low noise, and adaptability to a variety of heat sources (such as solar energy, biomass, geothermal energy, and nuclear energy). Its core performance relies on the precise coaxial motion of the power piston and valve piston within the cylinder. Any slight assembly deviation can lead to friction loss, seal failure, reduced efficiency, and even mechanical seizure in severe cases. The clearances between the power piston and valve piston and the cylinder are typically tens or even several microns, making assembly challenging.

[0003] At present, the traditional Stirling generator assembly and commissioning generally adopts a combination of mechanical positioning and manual adjustment: the cylinder and support frame are fixed by welding or bolting, the piston end face runout value is measured with a dial indicator, and rough coaxial correction is achieved by tapping with a copper rod or adjusting with a gasket. However, due to the rigid constraints of the mechanical structure and the reliance on manual experience, it is impossible to dynamically compensate for small deviations after assembly and commissioning, resulting in the following problems: (1) The requirements for component processing accuracy are extremely high, and the assembly failure rate is high, increasing production costs. (2) Manual calibration is time-consuming and lacks real-time feedback means, making it difficult to quickly determine whether the coaxiality meets the standard; and the commissioning process relies on imported high-precision laser alignment instruments, which has high commissioning costs. Specifically, to ensure the coaxiality of the piston and cylinder, ultra-high-precision machine tools are required to process parts, resulting in high manufacturing costs, difficulty in completely eliminating machining errors, and a high assembly failure rate. The manual calibration process relies on experienced technicians to achieve rough positioning through tapping or shim adjustment, which takes several hours and lacks a real-time feedback mechanism, making it impossible to quickly verify whether the coaxiality meets the standard. The debugging process also requires the use of imported high-precision laser alignment instruments, further increasing equipment investment and operating costs. Furthermore, the existing process relies on offline testing or manual visual inspection, making it impossible to monitor friction conditions in real time during assembly and debugging. The quality of assembly and debugging is highly dependent on the operator's skill level, making consistency difficult to ensure. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a free-piston Stirling generator with a coaxial debugging device. Through the preload balance design of the leaf spring adjustment screw and the rubber ring, combined with dual electromagnetic drive and real-time monitoring of the acceleration waveform, the axial deviation of the piston and the cylinder can be dynamically compensated during the debugging process, thereby realizing frictionless coaxial debugging.

[0005] The technical solution adopted by the present invention to solve its technical problems is to provide a free piston Stirling generator with a coaxial debugging device, comprising a Stirling generator body and a coaxial debugging device, wherein the Stirling generator body comprises a gas distribution piston, a power piston, a cylinder, a gas distribution piston leaf spring, a power piston leaf spring, a first linear motor and a second linear motor, wherein the first linear motor comprises a first linear motor stator and a first linear motor mover, and the second linear motor comprises a second linear motor stator and a second linear motor mover; the coaxial debugging device comprises a first support frame, a second support frame, a power piston acceleration sensor, a gas distribution piston acceleration sensor, a power piston leaf spring adjustment device, a gas distribution piston leaf spring adjustment device and an oscilloscope, wherein the power piston acceleration sensor and the gas distribution piston acceleration sensor are connected to the oscilloscope Connect; the first support frame covers the Stirling generator body, the second support frame covers the top of the first support frame, the cylinder, the first linear motor stator and the first support frame are fixed, the air piston is placed at the bottom of the cylinder, the power piston and the first linear motor mover are fixed on the power piston leaf spring, the power piston leaf spring is horizontally fixed on the first support frame, the air piston leaf spring is horizontally fixed on the second support frame, the air piston rod passes through the power piston, the power piston leaf spring and the air piston leaf spring, one end of the air piston rod is connected to the air piston, and the other end is connected to the second linear motor mover, the second linear motor stator is nested in the second linear motor mover and fixed on the second support frame; the power piston acceleration sensor is fixed on the power piston leaf spring, and the air piston acceleration sensor is fixed on the air piston leaf spring.

[0006] Furthermore, the first support frame is a hollow cylindrical structure with openings at both ends. The bottom of the first support frame expands outwards and is connected to the cylinder. The middle of the first support frame expands outwards to form a first platform. The top of the first support frame expands outwards to form a second platform. The power piston leaf spring is located on the first platform, and the gas piston leaf spring is located on the second platform. The second support frame is a cover structure with an opening at one end and a hollow structure. The open end of the second support frame is connected to the second platform.

[0007] Furthermore, the power piston leaf spring adjustment device includes a power piston leaf spring adjustment rubber ring, a power piston leaf spring adjustment screw, and a power piston leaf spring fixing screw. The power piston leaf spring has two longitudinal springs evenly distributed on its circumferential edge. N The number of fixing screws of the power piston leaf spring corresponds to the number of through holes. Each fixing screw of the power piston leaf spring passes through the through hole and is fixed on the first platform. There are 2 evenly distributed on the first platform. N The fixing screws of each power piston leaf spring are connected to the corresponding threaded holes on the first platform. A power piston leaf spring adjusting rubber ring is provided between the power piston leaf spring and the fixing screws of the power piston leaf spring. The circumferential end surface of the power piston leaf spring is evenly distributed with 2 transverse nThere are 2 adjusting threaded holes, and the number of adjusting screws for the power piston leaf spring corresponds to the number of adjusting threaded holes. Each adjusting screw for the power piston leaf spring passes through the first support frame and is screwed into the adjusting threaded hole of the power piston leaf spring. The power piston leaf spring can be slightly moved by adjusting the adjusting screw of the power piston leaf spring. There are 2 adjusting screws evenly distributed on the side wall of the first support frame. n A threaded hole is formed on the side wall of the first support frame, and each power piston leaf spring adjusting screw passes through a corresponding threaded hole on the side wall of the first support frame.

[0008] Furthermore, the gas piston leaf spring adjustment device includes a gas piston leaf spring adjustment rubber ring, a gas piston leaf spring adjustment screw, and a gas piston leaf spring fixing screw. The gas piston leaf spring has two longitudinal springs evenly distributed on its circumferential edge. N The number of fixing screws of the gas piston leaf spring corresponds to the number of through holes. Each fixing screw of the gas piston leaf spring passes through the through hole and is fixed on the second platform. There are 2 evenly distributed on the second platform. N The fixing screws of the gas piston leaf spring are connected to the corresponding threaded holes on the second platform. A gas piston leaf spring adjusting rubber ring is provided between the gas piston leaf spring and the fixing screws of the gas piston leaf spring. The circumferential end surface of the gas piston leaf spring is evenly distributed with 2 transverse n There are 2 adjusting threaded holes, and the number of adjusting screws of the gas piston leaf spring corresponds to the number of adjusting threaded holes. Each gas piston leaf spring adjusting screw passes through the second support frame and is screwed into the adjusting threaded hole of the gas piston leaf spring. The gas piston leaf spring can be slightly moved by adjusting the adjusting screw of the gas piston leaf spring. There are 2 evenly distributed on the side wall of the second support frame. n A threaded hole is provided, and each gas distribution piston leaf spring adjusting screw passes through the corresponding threaded hole on the side wall of the second support frame.

[0009] Furthermore, the N is an integer greater than or equal to 2, n is an integer greater than or equal to 2.

[0010] A method for debugging a free-piston Stirling generator with a coaxial debugging device comprises the following steps:

[0011] Step S1: Adjust the interval N Set the power piston leaf spring screws to a specific tightness;

[0012] Step S2: exciting the first linear motor mover to make the power piston vibrate up and down;

[0013] Step S3: Adjust the power piston leaf spring adjusting screw to make the power piston leaf spring produce slight lateral movement;

[0014] Step S4: Use the remaining N The power piston leaf spring is completely fixed by a power piston leaf spring;

[0015] Step S5: Adjust the interval N Set the valve piston leaf spring fixing screws to a specific tightness;

[0016] Step S6: exciting the second linear motor mover to make the valve piston vibrate up and down;

[0017] Step S7: Adjust the adjusting screw of the gas distribution piston leaf spring to make the gas distribution piston leaf spring produce slight lateral movement;

[0018] Step S8: Use the remaining N The gas piston leaf spring is completely fixed.

[0019] Furthermore, the specific tightness in step S1 means that when the power piston vibrates up and down, the power piston leaf spring remains stationary, and when the power piston leaf spring adjusting screw is adjusted, the power piston leaf spring can produce lateral movement; the specific tightness in step S5 means that when the gas piston vibrates up and down, the gas piston leaf spring remains stationary, and when the gas piston leaf spring adjusting screw is adjusted, the gas piston leaf spring can produce lateral movement.

[0020] Further, in step S3, the specific method is: first adjust a group of power piston leaf spring adjusting screws on the same axis, push the power piston leaf spring forward and backward on the axis, and cause the power piston to move slightly. Observe the oscilloscope waveform during the adjustment process. When the distortion rate of the power piston acceleration waveform is <10%, adjust another group of power piston leaf spring adjusting screws on the same axis, push the power piston leaf spring forward and backward on the axis, and cause the power piston leaf spring to move slightly. Observe the oscilloscope waveform during the adjustment process. When the distortion rate of the power piston acceleration waveform is <1%, stop adjusting.

[0021] Further, in step S7, the specific method is: first adjust a group of valve piston leaf spring adjusting screws on the same axis, push the valve piston leaf spring forward and backward on the axis, and cause the valve to move slightly, observe the oscilloscope waveform during the adjustment process, and when the valve piston acceleration waveform distortion rate is less than 10%, adjust another group of valve piston leaf spring adjusting screws on the same axis, push the valve piston leaf spring forward and backward on the axis, and cause the valve piston leaf spring to move slightly, observe the oscilloscope waveform during the adjustment process, and stop adjusting when the valve piston acceleration waveform distortion rate is less than 1%.

[0022] Furthermore, the complete fixation in step S4 means that when the power piston leaf spring adjusting screw is adjusted, the power piston leaf spring cannot produce lateral movement; the complete fixation in step S8 means that when the gas piston leaf spring adjusting screw is adjusted, the gas piston leaf spring cannot produce lateral movement.

[0023] Compared with the prior art, the advantages of the present invention are as follows:

[0024] To address the existing Stirling generator assembly and commissioning processes, which rely on high-precision machining, lack adjustment flexibility, and lack real-time calibration methods, the present invention proposes a coaxial commissioning device and method for a free-piston Stirling generator. This device utilizes leaf spring adjustment devices (a power piston leaf spring adjustment device and a valve piston leaf spring adjustment device) to achieve a dynamic balance between lateral displacement compensation and vertical rigidity constraint during assembly, replacing the traditional fixed limiter structure. The leaf spring adjustment device's preload-balancing design, combined with dual electromagnetic drive and real-time acceleration waveform monitoring, dynamically compensates for piston-cylinder axis deviation during commissioning, achieving frictionless coaxial commissioning. This method significantly reduces reliance on component machining accuracy and improves commissioning efficiency. Furthermore, through elastic constraints and real-time feedback mechanisms, it ensures the generator's operational stability and longevity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a free piston Stirling generator with a coaxial debugging device according to an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 A schematic structural diagram of the first support frame of the illustrated embodiment.

[0027] Figure 3 yes Figure 1 A schematic structural diagram of the second support frame of the illustrated embodiment.

[0028] Figure 4 yes Figure 1 A partial enlarged view of A of the illustrated embodiment.

[0029] Figure 5 yes Figure 1 A partial enlarged view of B of the illustrated embodiment.

[0030] Figure 6 yes Figure 1 Schematic diagram of adjusting the valve piston leaf spring adjusting screw in the illustrated embodiment.

[0031] Figure 7 This is the waveform of the valve piston acceleration sensor before debugging in the debugging method of the free piston Stirling generator with a coaxial debugging device according to an embodiment of the present invention.

[0032] Figure 8 This is the waveform of the valve piston acceleration sensor after debugging is completed in the debugging method of the free piston Stirling generator with a coaxial debugging device in an embodiment of the present invention.

[0033] 1—distributor piston, 2—distributor piston rod, 3—power piston, 4—cylinder, 5—first linear motor stator, 6—first linear motor mover, 7—distributor piston leaf spring, 8—power piston leaf spring, 9—power piston acceleration sensor, 10—distributor piston acceleration sensor, 11—first support frame, 12—distributor piston leaf spring adjusting screw, 13—second linear motor stator, 14—second linear motor mover, 15—second support frame, 16—distributor piston leaf spring fixing screw, 17—distributor piston leaf spring adjusting rubber ring, 18—power piston leaf spring adjusting screw, 19—power piston leaf spring fixing screw, 20—power piston leaf spring adjusting rubber ring, 21—first platform, 22—second platform. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figure 1 The free-piston Stirling generator with a coaxial debugging device in this embodiment includes a Stirling generator body and a coaxial debugging device. The Stirling generator body includes a distribution piston 1, a power piston 3, a cylinder 4, a distribution piston leaf spring 7, a power piston leaf spring 8, a first linear motor, and a second linear motor. The first linear motor includes a first linear motor stator 5 and a first linear motor mover 6. The second linear motor includes a second linear motor stator 13 and a second linear motor mover 14. The coaxial debugging device includes a first support frame 11, a second support frame 15, a power piston acceleration sensor 9, a distribution piston acceleration sensor 10, a power piston leaf spring adjustment device, a distribution piston leaf spring adjustment device, and an oscilloscope. The power piston acceleration sensor 9 and the distribution piston acceleration sensor 10 are connected to the oscilloscope.

[0036] The first support frame 11 covers the Stirling generator body, and the second support frame 15 covers the top of the first support frame 11. The cylinder 4 and the first linear motor stator 5 are fixed to the first support frame 11. The gas piston 1 is placed at the bottom of the cylinder 4. The power piston 3 and the first linear motor mover 6 are fixed to the power piston leaf spring 8. The power piston leaf spring 8 is horizontally fixed to the first support frame 11 with screws. The gas piston leaf spring 7 is horizontally fixed to the second support frame 15 with screws. The gas piston rod 2 passes through the power piston 3, the power piston leaf spring 8, and the gas piston leaf spring 7. One end of the gas piston rod 2 is connected to the gas piston 1, and the other end is connected to the second linear motor mover 14. The second linear motor stator 13 is nested in the second linear motor mover 14 and fixed to the second support frame 15 with screws. The power piston acceleration sensor 9 is fixed near the center of the power piston leaf spring, and the gas piston acceleration sensor 10 is fixed near the center of the gas piston leaf spring 7.

[0037] Reference Figure 2 、 Figure 3 The first support frame 11 is a hollow cylindrical structure with openings at both ends. The bottom of the first support frame 11 expands outwards and is connected to the cylinder 4. The middle part of the first support frame 11 expands outwards to form a first platform 21. The top of the first support frame 11 expands outwards to form a second platform 22. The power piston leaf spring 8 is located on the first platform 21, and the gas piston leaf spring 7 is located on the second platform 22. The second support frame 15 is a hollow cover structure with an opening at one end. The open end of the second support frame 15 is connected to the second platform 22.

[0038] Reference Figure 5 The power piston leaf spring adjustment device includes a power piston leaf spring adjustment rubber ring 20, a power piston leaf spring adjustment screw 18, and a power piston leaf spring fixing screw 19. Twelve longitudinal through-holes are evenly distributed along the circumference of the power piston leaf spring 8. The number of power piston leaf spring fixing screws 19 corresponds to the number of through-holes. Each power piston leaf spring fixing screw 19 passes through a through-hole and is fixed to the first platform 21. The first platform 21 has 12 threaded holes evenly distributed on it, and each power piston leaf spring fixing screw 19 connects to a corresponding threaded hole on the first platform 21. A power piston leaf spring adjustment rubber ring 20 is provided between the power piston leaf spring 8 and the power piston leaf spring fixing screw 19. Four transverse adjustment threaded holes are evenly distributed along the circumferential end surface of the power piston leaf spring 8. The number of power piston leaf spring adjustment screws 18 corresponds to the number of adjustment threaded holes. Each power piston leaf spring adjustment screw 18 passes through the first support frame 11 and is screwed into the adjustment threaded hole of the power piston leaf spring 8. The power piston leaf spring 8 can be finely moved by adjusting the power piston leaf spring adjustment screw 18. There are 4 threaded holes evenly distributed on the side wall of the first support frame 11, and each power piston leaf spring adjusting screw 18 passes through the corresponding threaded hole on the side wall of the first support frame 11. The threaded holes on the side wall of the first support frame 11 can be used to place the power piston leaf spring adjusting screw 18.

[0039] Reference Figure 4The gas piston leaf spring adjustment device includes a gas piston leaf spring adjustment rubber ring 17, a gas piston leaf spring adjustment screw 12, and a gas piston leaf spring fixing screw 16. Twelve longitudinal through holes are evenly distributed on the circumferential edge of the gas piston leaf spring 7. The number of the gas piston leaf spring fixing screws 16 corresponds to the number of through holes. Each gas piston leaf spring fixing screw 16 is fixed on the second platform 22 through the through hole. Twelve threaded holes are evenly distributed on the second platform 22. Each gas piston leaf spring fixing screw 16 is connected to the corresponding threaded hole on the second platform 22. A gas piston leaf spring adjustment rubber ring 17 is provided between the gas piston leaf spring 7 and the gas piston leaf spring fixing screw 16. The circumferential end surface of the valve piston leaf spring 7 is evenly distributed with four transverse adjustment threaded holes. The number of valve piston leaf spring adjustment screws 12 corresponds to the number of adjustment threaded holes. Each valve piston leaf spring adjustment screw 12 passes through the second support frame 15 and screws into the adjustment threaded hole of the valve piston leaf spring 7. The valve piston leaf spring 7 can be finely moved by adjusting the valve piston leaf spring adjustment screw 12. The side wall of the second support frame 15 has four evenly distributed threaded holes. Each valve piston leaf spring adjustment screw 12 passes through a corresponding threaded hole in the side wall of the second support frame 15. The threaded holes in the side wall of the second support frame 15 can be used to accommodate the valve piston leaf spring adjustment screw 12.

[0040] The debugging method of the free piston Stirling generator of this embodiment includes the following steps:

[0041] Step S1: Adjusting the six spaced fixing screws of the power piston leaf springs to a specific tightness. The specific tightness means that when the power piston 3 vibrates up and down, the power piston leaf spring 8 remains stationary, and when the power piston leaf spring adjusting screws are adjusted, the power piston leaf spring 8 can produce lateral movement. In this embodiment, the specific tightness is specifically embodied as follows: adjusting the six spaced fixing screws of the power piston leaf springs so that the extruded height of the power piston leaf spring adjusting rubber ring is reduced to half of the initial height.

[0042] Step S2: The AC power generated by the AC power supply excites the first linear motor mover 6 to make the power piston 3 vibrate up and down;

[0043] Step S3: Adjust the power piston leaf spring adjustment screws to cause the power piston leaf spring 8 to produce slight lateral movement. The specific method is as follows: First, adjust a set of power piston leaf spring adjustment screws on the same axis, pushing the power piston leaf spring 8 forward and backward on that axis to cause slight movement of the power piston 3. Observe the oscilloscope waveform during the adjustment process. When the power piston acceleration waveform distortion rate (THD) is less than 10%, adjust another set of power piston leaf spring adjustment screws on the same axis, pushing the power piston leaf spring 8 forward and backward on that axis to cause slight movement of the power piston leaf spring 8. Observe the oscilloscope waveform during the adjustment process. When the power piston acceleration waveform distortion rate (THD) is less than 1%, stop adjusting.

[0044] Step S4: Use the remaining six power piston leaf springs to completely secure the power piston leaf spring 8. Completely securing means that the power piston leaf spring 8 cannot move laterally when the power piston leaf spring adjusting screw is adjusted.

[0045] Step S5: Adjust the six spaced apart fixing screws of the gas piston leaf springs to a specific tightness. The specific tightness is such that the gas piston leaf spring 7 remains stationary when the gas piston 1 vibrates up and down, and the gas piston leaf spring 7 can move laterally when the gas piston leaf spring adjusting screws are adjusted. In this embodiment, the specific tightness is specifically achieved by adjusting the six spaced apart fixing screws of the gas piston leaf springs until the compressed height of the gas piston leaf spring adjusting rubber ring is reduced to half of its original height.

[0046] Step S6: The AC power generated by the AC power supply excites the second linear motor mover 14 to make the valve piston 1 vibrate up and down;

[0047] Step S7: Adjust the valve piston leaf spring adjusting screw to make the valve piston leaf spring 7 produce a slight lateral movement; Figure 6 , Figure 6 The middle arrow indicates slight movement. The specific method is as follows: First, adjust a set of valve piston leaf spring adjusting screws on the same axis. This axis pushes valve piston leaf spring 7 upward and backward, causing valve piston 1 to move slightly. Observe the oscilloscope waveform during the adjustment process. When the valve piston acceleration waveform distortion rate (THD) is less than 10%, adjust another set of valve piston leaf spring adjusting screws on the same axis. This axis pushes valve piston leaf spring 7 upward and backward, causing valve piston leaf spring 7 to move slightly. Observe the oscilloscope waveform during the adjustment process. When the valve piston acceleration waveform distortion rate (THD) is less than 1%, stop adjustment.

[0048] Step S8: Use the remaining six gas distribution piston leaf springs to completely fix the gas distribution piston leaf spring 7. Complete fixation means that when the gas distribution piston leaf spring adjusting screw is adjusted, the gas distribution piston leaf spring 7 cannot move laterally.

[0049] Before debugging, the waveform of the valve piston acceleration sensor of the free piston Stirling generator is as follows: Figure 7 As shown, after debugging is completed, the waveform of the valve piston acceleration sensor of the free piston Stirling generator is as follows Figure 8As shown in the figure. At a specific tightness, the leaf spring fixing screw provides sufficient preload to fix the vertical direction, allowing the leaf spring to remain stationary when the piston vibrates up and down. The presence of the rubber ring provides compression resistance in the vertical direction (enhanced constraint) while allowing shear deformation in the lateral direction. Its elastic properties absorb vibration and reduce the friction resistance of lateral movement, further promoting lateral freedom. Therefore, when the leaf spring adjusting screw is adjusted, the leaf spring adjusting screw produces a small movement, allowing the leaf spring to move laterally with high precision.

[0050] Figure 1 The figure shows the placement of the free piston Stirling generator during commissioning. Figure 1 After the free piston Stirling generator is debugged, the oscilloscope is disconnected, the second bracket 15 and the second linear motor are removed, the housing is installed, and the free piston Stirling generator is used normally.

[0051] The present invention achieves dynamic fine-tuning through the cooperation of the leaf spring adjusting screw with the leaf spring fixing screw and the rubber ring, without relying on high-precision processing or complex tooling, which significantly reduces the difficulty and cost of assembly. Through the lateral fine-tuning of the leaf spring adjusting screw and the real-time monitoring of the acceleration sensor waveform, high-precision coaxial assembly of the power piston and the valve piston is achieved, avoiding the errors of traditional manual calibration and ensuring frictionless operation after assembly. The real-time feedback mechanism based on the acceleration waveform characteristics greatly shortens the assembly time of the Stirling generator and significantly improves the assembly consistency. The closed-loop control of dual linear motor drive and dual acceleration sensor real-time feedback replaces a single sensor or offline detection method, which significantly improves the assembly accuracy and efficiency.

[0052] Those skilled in the art may make various modifications and variations to the present invention. If these modifications and variations are within the scope of the claims of the present invention and their equivalents, then these modifications and variations are also within the scope of protection of the present invention.

[0053] The contents not described in detail in the specification are prior art known to those skilled in the art.

Claims

1. A free piston Stirling generator with a coaxial debugging device, characterized by: The invention comprises a Stirling generator body and a coaxial debugging device, wherein the Stirling generator body comprises a gas distribution piston, a power piston, a cylinder, a gas distribution piston leaf spring, a power piston leaf spring, a first linear motor and a second linear motor, wherein the first linear motor comprises a first linear motor stator and a first linear motor mover, and the second linear motor comprises a second linear motor stator and a second linear motor mover; the coaxial debugging device comprises a first support frame, a second support frame, a power piston acceleration sensor, a gas distribution piston acceleration sensor, a power piston leaf spring adjusting device, a gas distribution piston leaf spring adjusting device and an oscilloscope, wherein the power piston acceleration sensor and the gas distribution piston acceleration sensor are connected to the oscilloscope; the first support frame is covered on the Stirling generator body, and the second support frame is covered on the power distribution piston acceleration sensor. The second support frame is covered on the top of the first support frame, the cylinder and the first linear motor stator are fixed to the first support frame, the air piston is placed at the bottom of the cylinder, the power piston and the first linear motor mover are fixed on the power piston leaf spring, the power piston leaf spring is horizontally fixed on the first support frame, the air piston leaf spring is horizontally fixed on the second support frame, the air piston rod passes through the power piston, the power piston leaf spring and the air piston leaf spring, one end of the air piston rod is connected to the air piston, and the other end is connected to the second linear motor mover, the second linear motor stator is nested in the second linear motor mover and fixed on the second support frame; the power piston acceleration sensor is fixed on the power piston leaf spring, and the air piston acceleration sensor is fixed on the air piston leaf spring.

2. The free piston Stirling generator with a coaxial debugging device according to claim 1, characterized in that: The first support frame is a hollow cylindrical structure with openings at both ends. The bottom of the first support frame expands outward in a circle and is connected to the cylinder. The middle of the first support frame expands outward in a circle to form a first platform. The top of the first support frame expands outward in a circle to form a second platform. The power piston leaf spring is located on the first platform, and the gas piston leaf spring is located on the second platform. The second support frame is a hollow cover structure with an opening at one end, and the open end of the second support frame is connected to the second platform.

3. The free piston Stirling generator with a coaxial debugging device according to claim 2, characterized in that: The power piston leaf spring adjustment device includes a power piston leaf spring adjustment rubber ring, a power piston leaf spring adjustment screw, and a power piston leaf spring fixing screw. The power piston leaf spring has two longitudinal N The number of fixing screws of the power piston leaf spring corresponds to the number of through holes. Each fixing screw of the power piston leaf spring passes through the through hole and is fixed on the first platform. There are 2 evenly distributed on the first platform. N The fixing screws of each power piston leaf spring are connected to the corresponding threaded holes on the first platform. A power piston leaf spring adjusting rubber ring is provided between the power piston leaf spring and the fixing screws of the power piston leaf spring. The circumferential end surface of the power piston leaf spring is evenly distributed with 2 transverse n There are 2 adjusting threaded holes, and the number of adjusting screws for the power piston leaf spring corresponds to the number of adjusting threaded holes. Each adjusting screw for the power piston leaf spring passes through the first support frame and is screwed into the adjusting threaded hole of the power piston leaf spring. The power piston leaf spring can be slightly moved by adjusting the adjusting screw of the power piston leaf spring. There are 2 adjusting screws evenly distributed on the side wall of the first support frame. n A threaded hole is formed on the side wall of the first support frame, and each power piston leaf spring adjusting screw passes through a corresponding threaded hole on the side wall of the first support frame.

4. The free piston Stirling generator with a coaxial debugging device according to claim 3, characterized in that: The gas distribution piston plate spring adjustment device includes a gas distribution piston plate spring adjustment rubber ring, a gas distribution piston plate spring adjustment screw, and a gas distribution piston plate spring fixing screw. The gas distribution piston plate spring circumferential edge is evenly distributed with two longitudinal N The number of fixing screws of the gas piston leaf spring corresponds to the number of through holes. Each fixing screw of the gas piston leaf spring passes through the through hole and is fixed on the second platform. There are 2 evenly distributed on the second platform. N The fixing screws of the gas piston leaf spring are connected to the corresponding threaded holes on the second platform. A gas piston leaf spring adjusting rubber ring is provided between the gas piston leaf spring and the fixing screws of the gas piston leaf spring. The circumferential end surface of the gas piston leaf spring is evenly distributed with 2 transverse n There are 2 adjusting threaded holes, and the number of adjusting screws of the gas piston leaf spring corresponds to the number of adjusting threaded holes. Each gas piston leaf spring adjusting screw passes through the second support frame and is screwed into the adjusting threaded hole of the gas piston leaf spring. The gas piston leaf spring can be slightly moved by adjusting the adjusting screw of the gas piston leaf spring. There are 2 evenly distributed on the side wall of the second support frame. n A threaded hole is provided, and each gas distribution piston leaf spring adjusting screw passes through the corresponding threaded hole on the side wall of the second support frame.

5. The free piston Stirling generator with a coaxial debugging device according to claim 4, characterized in that: described N is an integer greater than or equal to 2, n is an integer greater than or equal to 2.

6. A method for debugging a free piston Stirling generator with a coaxial debugging device, applied to the free piston Stirling generator with a coaxial debugging device according to claim 5, characterized in that: The following steps are involved: Step S1: Adjust the interval N Set the power piston leaf spring screws to a specific tightness; Step S2: exciting the first linear motor mover to make the power piston vibrate up and down; Step S3: Adjust the power piston leaf spring adjusting screw to make the power piston leaf spring produce slight lateral movement; Step S4: Use the remaining N The power piston leaf spring is completely fixed by a power piston leaf spring; Step S5: Adjust the interval N Set the valve piston leaf spring fixing screws to a specific tightness; Step S6: exciting the second linear motor mover to make the valve piston vibrate up and down; Step S7: Adjust the adjusting screw of the gas distribution piston leaf spring to make the gas distribution piston leaf spring produce slight lateral movement; Step S8: Use the remaining N The gas piston leaf spring is completely fixed.

7. The debugging method for a free-piston Stirling generator with a coaxial debugging device as described in claim 6 is characterized in that: the specific tightness in step S1 means that when the power piston vibrates up and down, the power piston leaf spring remains stationary, and when the power piston leaf spring adjusting screw is adjusted, the power piston leaf spring can produce lateral movement; the specific tightness in step S5 means that when the gas piston vibrates up and down, the gas piston leaf spring remains stationary, and when the gas piston leaf spring adjusting screw is adjusted, the gas piston leaf spring can produce lateral movement.

8. The debugging method of a free-piston Stirling generator with a coaxial debugging device according to claim 6, characterized in that: In step S3, the specific method is: first adjust a set of power piston leaf spring adjusting screws on the same axis, push the power piston leaf spring forward and backward on the axis, and cause the power piston to move slightly. Observe the oscilloscope waveform during the adjustment process. When the distortion rate of the power piston acceleration waveform is <10%, adjust another set of power piston leaf spring adjusting screws on the same axis, push the power piston leaf spring forward and backward on the axis, and cause the power piston leaf spring to move slightly. Observe the oscilloscope waveform during the adjustment process. When the distortion rate of the power piston acceleration waveform is <1%, stop adjusting.

9. The debugging method of a free piston Stirling generator with a coaxial debugging device according to claim 6, characterized in that: In step S7, the specific method is: first adjust a set of valve piston leaf spring adjusting screws on the same axis, push the valve piston leaf spring forward and backward on the axis, and cause the valve to move slightly. Observe the oscilloscope waveform during the adjustment process. When the valve piston acceleration waveform distortion rate is less than 10%, adjust another set of valve piston leaf spring adjusting screws on the same axis, push the valve piston leaf spring forward and backward on the axis, and cause the valve piston leaf spring to move slightly. Observe the oscilloscope waveform during the adjustment process. When the valve piston acceleration waveform distortion rate is less than 1%, stop adjusting.

10. The debugging method of a free piston Stirling generator with a coaxial debugging device according to claim 6, characterized in that: The complete fixation in step S4 means that when the power piston leaf spring adjusting screw is adjusted, the power piston leaf spring cannot produce lateral movement; the complete fixation in step S8 means that when the distribution piston leaf spring adjusting screw is adjusted, the distribution piston leaf spring cannot produce lateral movement.

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