CN114592988B - Guiding device for multistage Stirling engine piston - Google Patents
Guiding device for multistage Stirling engine piston Download PDFInfo
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- CN114592988B CN114592988B CN202210165557.5A CN202210165557A CN114592988B CN 114592988 B CN114592988 B CN 114592988B CN 202210165557 A CN202210165557 A CN 202210165557A CN 114592988 B CN114592988 B CN 114592988B
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- connecting rod
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- 230000033001 locomotion Effects 0.000 claims abstract description 24
- 238000013016 damping Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 19
- 239000011295 pitch Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 12
- 238000005457 optimization Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/0435—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines the engine being of the free piston type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention provides a guiding device for a piston of a multistage Stirling engine. The guide device comprises a stabilizing structure, an anti-collision vibration damping pad and a piston positioning spring, wherein the stabilizing structure consists of a collaborative vibration connecting rod, a stabilizing guide rod and a guide block. In the stable structure, the piston other end of multistage Stirling machine is connected to cooperation vibration connecting rod one end, and the guide block is installed in stable guide bar both sides. The piston transmits motion to the stable guide rod through the connecting rod, the motion of the stable guide rod is restrained by the guide block, and meanwhile, the motion is fed back to the piston through the connecting rod, so that the piston realizes stable axial motion. The invention realizes the stable axial movement of the piston of the Stirling engine without radial offset through structural design and parameter optimization, solves the problem of piston guiding caused by the fact that the multistage Stirling engine does not have a piston rod, ensures that the Stirling engine stably operates, and greatly prolongs the service life of the Stirling engine.
Description
Technical field:
the invention belongs to the field of multistage Stirling machines, and particularly relates to a guiding device for a piston of a multistage Stirling machine.
The background technology is as follows:
stirling machines are an ideal power generation device. For the problems of incapability of economically and efficiently utilizing a large amount of industrial waste heat, and the like, particularly for projects such as combined heat and power generation of small and medium scale (generally 2MW and below), and the like, the Stirling engine is widely focused on as power generation equipment.
Aiming at the problems of complex equipment structure, large invalid volume, poor adjustability of a piston, poor anti-interference capability and the like of the existing Stirling engine with the double-acting free piston, a novel structure of a multi-stage Stirling engine is proposed. The multistage Stirling engine realizes the functions of simple structure, high energy transmission efficiency, flexible and adjustable output power and the like by multistage connection of the compression cavity and the expansion cavity. The multistage Stirling engine solves the problem that the traditional Stirling engine is not suitable for adopting a large-diameter piston while the advantages of strong adaptability of the traditional Stirling engine to a heat source and the like are maintained, and can greatly improve the cost performance of the Stirling engine through large-scale.
However, the novel multi-stage Stirling engine also has the corresponding problems: the multi-stage Stirling engine is characterized in that a plurality of Stirling units are connected up and down, so that a large space height requirement is caused; the multistage Stirling engine part pistons are arranged between the cold and hot cavities, no piston rod exists, and a traditional piston guiding method is adopted, so that two guide rings with a certain distance are required to be arranged on the pistons, the total height of the engine can be further increased, and the complexity of the piston structure is increased; the two guide rings are adopted, so that one guide ring and the corresponding seal ring are positioned at a position with higher temperature, and an additional cooling device is needed to protect the seal ring and the guide ring.
In order to solve the problems that the total height of an engine is increased and protective cooling is needed in a multistage Stirling engine piston guide device, the invention provides the guide device which is strong in adjustability and high in stability, can be suitable for multistage Stirling engines with different diameters, and can use a planar guide block to replace a guide ring, so that the manufacturing difficulty of the guide device is reduced.
The invention comprises the following steps:
the invention aims to research and design a guiding device of a multistage Stirling engine piston so as to solve the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme,
a guiding device for a multistage stirling engine piston, comprising: the device comprises a stable structure, wherein the stable structure comprises a cooperative vibration connecting rod along the radial direction of a piston and a stable guide rod connected with the cooperative vibration connecting rod along the axial direction of the piston; guide blocks arranged on two sides of the stable guide rod; the vibration connecting rod penetrates the cylinder body in a cooperated mode and is connected with the piston, the stable guide rod is constrained by the guide block to move only in the direction parallel to the piston, the stable structure is arranged at a plurality of positions along the circumferential direction of the piston, and the piston is constrained to move only axially under the combined action of the stable guide rods.
Preferably, the radial opening of piston has the installation opening that corresponds of cooperation vibration connecting rod, cooperation vibration connecting rod and piston threaded connection, cooperation vibration connecting rod and stable guide bar threaded connection, cooperation vibration connecting rod are pipe or box cross-section, and the shrouding is established to the tip and the screw hole is bored to the portion.
Preferably, an upper sealing ring and a lower sealing ring are arranged between the piston and the cylinder body, and a radial cooperative vibration connecting rod (1) is arranged between the upper sealing ring and the lower sealing ring of the piston.
Preferably, the device further comprises a guide support, the stabilizing structure is arranged in the guide support, the guide support is fixed on the air cylinder and is sealed with the outside, the guide device is free from dynamic seal, a space for vertical movement of the collaborative vibration connecting rod is arranged in the guide support, and the guide block is attached to the inner wall of the guide support.
Preferably, an anti-collision vibration-damping pad is arranged at a position on the guide support corresponding to the cooperative vibration connecting rod.
Preferably, a piston positioning spring is arranged between the bottom of the stabilizing guide rod and the inner wall of the guide bracket, so that the piston is positioned near the balance position of the piston motion in the stop state.
Preferably, the self-vibration frequency of the guiding device is smaller than 0.75 times of the working frequency of the multi-stage Stirling machine, the phenomenon that the guiding device resonates along with the working of the multi-stage Stirling machine is avoided, and the piston positioning spring is in a spring form capable of avoiding resonance.
Preferably, the cooperative vibration connecting rod and the stabilizing guide rod adopt hollow sections.
Preferably, the piston positioning spring adopts bolt compression springs with unequal pitches, and the springs are gradually tightened from small pitches along with the increase of the deformation of the springs, so that the rigidity of the springs is gradually increased.
Preferably, the piston positioning spring adopts a reducing bolt spring, and the rigidity of the spring is gradually increased gradually from a large circle along with the increase of the deformation of the spring.
The guide device of the multistage Stirling engine has obvious technical advantages, and is mainly characterized in the following aspects:
1. the guide device of the multistage Stirling engine has good adaptability with the multistage Stirling engine through parameter calculation and structure optimization, does not influence the energy conversion efficiency of the multistage Stirling engine, and simultaneously enhances the stability, the adjustability and the anti-interference capability of the Stirling engine.
2. According to the multistage Stirling engine guiding device, the stable guiding rod is driven by the Stirling engine piston to axially move through the cooperative vibration connecting rod, so that the defect that the Stirling engine piston can radially move is solved, and the stable operation of the Stirling engine is ensured.
3. According to the multistage Stirling engine guiding device, the piston positioning spring and the anti-collision vibration reduction pad enable the movement change of the guiding rod to be smooth, the violent movement of the piston is limited through the connecting rod, the abrasion of the piston can be effectively slowed down, the service life of a piston part is greatly prolonged, and the service cycle of the Stirling engine is prolonged.
4. According to the guide device of the multistage Stirling engine, the guide blocks arranged outside replace guide rings which are required to be arranged inside the Stirling engine, so that the internal structure of the Stirling engine is simplified, and meanwhile, the disassembly and maintenance of the Stirling engine and the replacement of parts are facilitated.
The guide device of the multistage Stirling engine can flexibly adjust each parameter of the guide device according to different multistage Stirling engines, and has wide applicability.
Description of the drawings:
FIG. 1 is a schematic vertical cross-sectional view of a guide apparatus for a multi-stage Stirling engine in accordance with the invention;
FIG. 2 is a schematic plan view of a guide apparatus for a multi-stage Stirling engine of the invention;
fig. 3 is a horizontal cross-sectional view of the guide bar and guide block.
Reference numerals: 1. a cooperative vibration connecting rod; 2. stabilizing the guide rod; 3. a piston positioning spring; 4. an anti-collision vibration-damping pad; 5. an upper seal ring; 6. a lower seal ring; 7. a guide block; 8. and a guide bracket.
The specific embodiment is as follows:
the following examples are given by way of illustration only and are not to be construed as limiting the scope of the invention.
Referring to fig. 1 to 3, a guide device of a multi-stage stirling machine has a stabilizing structure comprising a cooperative vibration connecting rod 1 along a radial direction of a piston, and a stabilizing guide rod 2 connected to the cooperative vibration connecting rod 1 along an axial direction of the piston; and guide blocks 7 provided at both sides of the stabilizing guide bar 2; the vibration connecting rod 1 penetrates the cylinder body in a cooperation mode and is connected with the piston, the stable guide rod 2 is constrained by the guide block 7 to move only in the direction parallel to the piston, the stable structure is arranged at a plurality of positions along the circumferential direction of the piston, and the piston is constrained to move only axially under the combined action of the stable guide rods 2. Four guiding devices are symmetrically arranged at the horizontal position of the piston of the multistage Stirling engine, and each guiding device comprises: the device comprises a radial cooperative vibration connecting rod, an axial stable guide rod, a piston positioning spring and an anti-collision vibration pad, wherein guide blocks are arranged on two sides of the radial cooperative vibration connecting rod. The required restraining effect can be achieved by arranging three guide devices at proper positions or not adopting a symmetrical mode, but the difficulty of installation and adjustment is increased, so that four guide devices are generally suggested to be symmetrically arranged.
For the piston of a certain stage of the multistage Stirling engine, four directions of symmetry are opened at the periphery of the piston, the cooperative vibration connecting rod 1 is connected with the piston through threads between the upper sealing ring 5 and the lower sealing ring 6, the other end of the cooperative vibration connecting rod 1 is connected with the stable guide rod 2 through threads, and follow-up disassembly, replacement and maintenance are facilitated by adopting threaded connection. The collaborative vibration connecting rod 1 is a round tube or a box-shaped section, and the end part is provided with a sealing plate and a threaded hole is drilled on the end part, so that flexible connection between the sealing plate and the square guide rod can be realized.
The four stabilizing guide rods 2 symmetrically arranged in four directions of the horizontal piston can prevent the piston from radial deflection during the operation of the Stirling heat engine, and specifically: the guide blocks 7 are arranged on the left side and the right side of the two front and back symmetrical stable guide rods, so that the piston can be prevented from shifting left and right, the guide blocks 7 are arranged on the front side and the back side of the two front and back symmetrical stable guide rods, the piston can be prevented from shifting front and back, the guide rods are provided with enough lengths, and the guide blocks are arranged near the upper end and the lower end of the guide rods in a matching mode or in a distribution mode, so that the piston can be prevented from rotating. Therefore, the piston is fully ensured to only axially move, and the influence on the working stability of the Stirling engine caused by radial shaking of the piston is prevented. The guide block is made of filled polytetrafluoroethylene or polyamide high polymer material with high stability and friction resistance, and the thickness of the guide block is 1-3cm.
The guide device is internally provided with the piston positioning spring, and the piston positioning spring enables the piston to be positioned near the piston motion balance position in the equipment stop state, so that the quick start of the multistage Stirling engine is facilitated. The multistage Stirling engine has higher working frequency, the piston positioning spring needs to avoid resonance, and the variable pitch coil spring or the variable diameter coil spring can be adopted. The spring material can be 65mn carbon spring steel, and the spring has higher tensile strength and fatigue resistance, and can ensure stable elasticity under the condition of long-term deformation. The piston positioning spring is supported at the bottom of the guide rod, and the replacement of guide blocks arranged at two sides of the guide rod is not affected.
An anti-collision vibration-damping pad 4 is arranged in the guiding device. The piston can be caused to strike the heat exchanger due to improper operation or severe sealing leakage, and the anti-collision vibration reduction pad 4 slows down the impact speed when the piston reaches the heat exchanger by slowing down the movement speed of the guide device, so that the heat exchanger or the piston is prevented from being damaged due to the fact that the piston speed is too high. The anti-collision damping pad is made of polyethylene or polyurethane, and the two high polymer materials have high physical and chemical stability, and the manufactured damping pad has excellent anti-collision performance. The thickness of the vibration reduction pad is controlled to be 1-2cm, the distance between the vibration reduction pad and the bottom of the stable guide rod is slightly smaller than the distance between the piston and the heat exchanger, the impact force between the stable guide rod and the equipment shell can be effectively reduced, and the operation stability of the multistage Stirling engine is improved while parts are protected.
The guide device only performs gentle axial movement under the combined action of the piston positioning spring 3, the anti-collision vibration reduction pad 4 and the guide block 7, and the cooperative vibration connecting rod drives the piston to perform a structural form of steady axial movement, so that the abrasion of the piston is reduced, and the service life of the multistage Stirling engine is prolonged.
The guide device needs to follow the piston to do high-frequency reciprocating motion, resonance phenomenon of the guide device needs to be avoided, and meanwhile obvious deformation of the guide device is avoided. This requires that the guide has sufficient stiffness, which can be measured by the natural frequency of the guide, which is required to be more than 25% different from the piston movement frequency in order to avoid resonance; in order to avoid significant deformations in the vibrations of the guide, it is necessary that the natural frequency of the guide is lower than the frequency of movement of the piston.
The adoption of hollow sections such as round pipes or box sections is an effective method for improving rigidity and reducing dead weight, and the self-vibration frequency of the guiding device can be obviously reduced.
The amplitude of the different pistons in the multi-stage stirling machine determines the amplitude of the co-vibrating connecting rod 1 and the size of the opening of the mounting limit 5. Based on the relevant parameters of the piston movement, the size of the stable guide rod 2, the elastic coefficient and the compressible length of the piston positioning spring 3 and the size of the anti-collision vibration reduction pad 4 are determined through parameter design and structural optimization. The choice of the spring material, the damping pad material and the material of the guide block can be changed according to actual demands. Because of the differences of piston diameters and motion amplitudes, the parameter values of all parts in the matched guide device slightly change according to specific structural optimization.
The sealing ring and the guide device are provided with holes at a sufficient distance, so that the sealing effect is not influenced by the arrangement of the opening. The guide device is connected between the sealing rings, so that the work of the Stirling engine is not influenced, and the high energy conversion rate of the Stirling engine is ensured.
The guide devices of the multistage Stirling machine are symmetrically distributed around the Stirling machine, the problem caused by the internal guide devices of the multistage Stirling machine is solved by installing the stable guide devices outside, and the stable operation of the multistage Stirling machine is ensured.
According to the multistage Stirling engine guiding device, all moving parts are arranged in the guiding support, and the outer part of the guiding support is sealed, so that the guiding device is free from dynamic sealing, the dynamic sealing is reduced, and the leakage loss and the processing and manufacturing cost of the Stirling engine can be obviously reduced. The method is characterized in that four mounting openings are formed between two sealing rings of each piston of the multi-stage Stirling engine, one end of a cooperative vibration connecting rod 1 at the opening is connected with a moving piston through threads, the other end of the connecting rod 1 is connected with a stable guide rod 2 through threads, and guide blocks 7 are mounted on two sides of the stable guide rod 2 to form a guide device. The guiding means are arranged inside the guiding bracket 8. A piston positioning spring 2 and an anti-collision vibration-damping pad 4 are arranged between the guide device and the guide bracket.
The guide block 7 is arranged between the stable guide rod 2 and the guide bracket 8, the contact surface of the guide block 7 and the stable guide rod 2 is parallel to the plane where the central line of the cooperative vibration connecting rod 1 and the central line of the stable guide rod 2 are located, and the guide block 7 is arranged near the upper end and the lower end of the stable guide rod 2, so that the stable guide rod can move along the axis of the stable guide rod or the axis direction of the cooperative vibration connecting rod 1. The movement of the stable guide rod 2 along the axial direction of the stable guide rod meets the movement requirement of the piston, and the movement along the axial direction of the cooperative vibration connecting rod 1 can adapt to the dimensional change of the guide device and the guide bracket 8 caused by temperature change. The guide block restricts the movement of the temperature guide bar perpendicular to the plane of the center line of the cooperative vibration connecting rod 1 and the center line of the stabilizing guide bar 2 and the rotation around the cooperative vibration connecting rod 1. The plurality of guide devices can limit the piston to move along the axial direction of the piston, thereby playing a role in guiding the piston.
The piston positioning spring 3 and the anti-collision vibration damping pad are arranged on the guiding device.
The guide device greatly simplifies the structure of the piston of the multistage Stirling engine, reduces the length of the double-acting free piston without a piston rod, replaces the traditional guide ring by the guide block, and reduces the processing and manufacturing difficulty.
Claims (10)
1. A guiding device for a multistage stirling engine piston, comprising: the device comprises a stable structure, wherein the stable structure comprises a cooperative vibration connecting rod (1) along the radial direction of a piston and a stable guide rod (2) connected with the cooperative vibration connecting rod (1) along the axial direction of the piston; and guide blocks (7) arranged at both sides of the stable guide rod (2); the vibration connecting rod (1) penetrates the cylinder body in a cooperation mode and is connected with the piston, the stable guide rod (2) is restrained by the guide block (7) to move in the direction parallel to the piston, the stable structure is arranged at a plurality of positions along the circumferential direction of the piston, and the piston is restrained to move axially only under the combined action of the stable guide rods (2).
2. A guide for a multistage stirling engine piston in accordance with claim 1 wherein: the radial opening of piston has the installation opening that corresponds of cooperation vibration connecting rod (1), cooperation vibration connecting rod (1) and piston threaded connection, cooperation vibration connecting rod (1) and stable guide bar (2) threaded connection, cooperation vibration connecting rod (1) are pipe or box cross-section, and the shrouding is established to the tip and the screw hole is bored to the portion.
3. A guide for a multistage stirling engine piston in accordance with claim 1 wherein: an upper sealing ring (5) and a lower sealing ring (6) are arranged between the piston and the cylinder body, and the radial cooperative vibration connecting rod (1) is arranged between the upper sealing ring (5) and the lower sealing ring (6) of the piston.
4. A guide for a multistage stirling engine piston in accordance with claim 3 wherein: still include guide bracket (8), stable structure sets up in guide bracket (8), and guide bracket (8) are fixed on the cylinder, seal with the outside for guider does not have dynamic seal, has the space of cooperation vibration connecting rod (1) vertical motion in guide bracket (8), and guide block (7) are laminated with the inner wall of guide bracket (8).
5. A guide for a multistage stirling engine piston in accordance with claim 4 wherein: and an anti-collision vibration-damping pad (4) is arranged at the position, corresponding to the cooperative vibration connecting rod (1), on the guide bracket (8).
6. A guide for a multistage stirling engine piston in accordance with claim 5 wherein: a piston positioning spring (3) is arranged between the bottom of the stable guide rod (2) and the inner wall of the guide bracket (8), so that the piston is positioned near the piston motion balance position in the stop state.
7. A guide for a multistage stirling engine piston in accordance with claim 6 wherein: the self-vibration frequency of the guiding device is smaller than 0.75 times of the working frequency of the multi-stage Stirling machine, the guiding device is prevented from generating resonance along with the working of the multi-stage Stirling machine, and the piston positioning spring (3) is in a spring form capable of avoiding resonance.
8. A guide for a multistage stirling engine piston in accordance with claim 7 wherein: the cooperative vibration connecting rod (1) and the stable guide rod (2) adopt hollow sections.
9. A guide for a multistage stirling engine piston in accordance with claim 8 wherein: the piston positioning spring (3) adopts bolts with unequal pitches to compress the spring, and the spring is gradually tightened from small pitches along with the increase of the deformation of the spring, so that the rigidity of the spring is gradually increased.
10. A guide for a multistage stirling engine piston in accordance with claim 8 wherein: the piston positioning spring (3) adopts a variable-diameter bolt spring, and along with the increase of the deformation of the spring, the spring is gradually fastened from a large circle, and the rigidity is gradually increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165557.5A CN114592988B (en) | 2022-02-23 | 2022-02-23 | Guiding device for multistage Stirling engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165557.5A CN114592988B (en) | 2022-02-23 | 2022-02-23 | Guiding device for multistage Stirling engine piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114592988A CN114592988A (en) | 2022-06-07 |
| CN114592988B true CN114592988B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210165557.5A Active CN114592988B (en) | 2022-02-23 | 2022-02-23 | Guiding device for multistage Stirling engine piston |
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| CN (1) | CN114592988B (en) |
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| CN111779590A (en) * | 2020-07-06 | 2020-10-16 | 王利 | Multi-stage Stirling engine and steady-state operation parameter regulation and control method thereof |
| CN113323768A (en) * | 2021-06-09 | 2021-08-31 | 中国科学院理化技术研究所 | Multistage temperature-changing cold and heat source Stirling combined cooling and power generation system |
| CN217380741U (en) * | 2022-02-23 | 2022-09-06 | 国能龙源环保有限公司 | Guide device of piston |
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| CN114592988A (en) | 2022-06-07 |
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