CN112066584B - Rotor type Stirling refrigerator and working method - Google Patents
Rotor type Stirling refrigerator and working method Download PDFInfo
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- CN112066584B CN112066584B CN202010977295.3A CN202010977295A CN112066584B CN 112066584 B CN112066584 B CN 112066584B CN 202010977295 A CN202010977295 A CN 202010977295A CN 112066584 B CN112066584 B CN 112066584B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims description 16
- 239000001307 helium Substances 0.000 claims description 15
- 229910052734 helium Inorganic materials 0.000 claims description 15
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 230000001788 irregular Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
A rotor type Stirling refrigerator and a working method belong to the field of refrigeration equipment. The special-shaped triangular rotor is provided with a tubular extension, an outer gear is arranged on the special-shaped triangular rotor, an eccentric shaft is inserted in the tubular extension and is driven by a motor through a coupling, the outer gear is matched with an inner gear fixed at the bottom end of the rotor accommodating cavity, so that the motor is enabled to be attached to the special-shaped triangular rotor in a mode when the motor drives the special-shaped triangular rotor to move in the rotor accommodating cavity through the eccentric shaft, four through holes are formed in an embedded sealing end cover, and two U-shaped heat exchange tube sets are arranged on the four through holes respectively. The rotor type Stirling refrigerator avoids the vibration problem of the traditional rhombic transmission and crank connecting rod type Stirling refrigerator, the efficiency is also improved by means of rotor driving, and the structural form is more compact. The internal working medium is in a sealed state and isolated from the outside, and no phase change and throttling process exists during circulation.
Description
Technical Field
The invention relates to a refrigerating machine and a working method, in particular to a rotor type Stirling refrigerating machine and a working method which are suitable for industrial and mining enterprises.
Background
The Stirling refrigerator is used as a refrigerator taking Stirling refrigeration cycle as a basic principle, and the working medium does not have the condition of phase change or throttling in the operation process, so that the efficiency is greatly improved, and the low temperature is easily realized. Nowadays, the Stirling refrigerator is developed more mature and can realize lower temperature in a short time, but the Stirling refrigerator with the relatively mature technology is a piston type or two-stage piston type refrigerator, the volume change in the machine body is changed and controlled by the reciprocating motion of a piston, and the problems of noise and vibration are serious. The Stirling refrigerator can realize low-temperature refrigeration and is widely applied to the fields of gas liquefaction, superconducting cooling, infrared probe cooling, liquid oxygen and liquid nitrogen preparation and the like due to the working principle of the Stirling refrigerator.
The solutions proposed today are mechanical structures that integrate power using star-type connecting rods, using a plurality of conventional piston stirling engines, or solutions that reduce vibration by means of different angular combinations, but they do not essentially eliminate the stirling engine vibration problem from the reciprocating inertial force.
Based on the problems, the rotor type Stirling engine provided at present utilizes the structural characteristics of the rotor type Stirling engine, and the rotation of the central eccentric rotor well avoids the vibration problem of the traditional piston. In terms of transmission, input power to rotate the rotor is a relatively stable and sustainable way.
The alpha type stirling machine is also called a double-piston stirling machine and is provided with two cylinders, and the volume sum of the two cylinders is periodically changed by utilizing the movement of a piston in the cylinder. However, the matching mode of the air cylinder and the piston is essentially the reciprocating motion of the piston in the linear direction, which causes the problem of great vibration of the whole machine, and the matching of the piston and the air cylinder can not realize the motion with high frequency, when the pressure of the internal working medium is determined, the input power of the machine body can not be increased to output more cold energy due to the motion without high frequency.
Disclosure of Invention
The technical problem is as follows: aiming at the defects of the technology, the Stirling refrigerator which has the advantages of simple structure, small volume and strong refrigerating effect, realizes expansion and compression of working media by utilizing a special cavity structure and a special rotor structure, and realizes refrigeration through heat exchange is provided.
The technical scheme is as follows: the invention relates to a rotor type Stirling refrigerating machine, which comprises a special-shaped triangular rotor, wherein the special-shaped triangular rotor is arranged in a rotor accommodating cavity, a space for accommodating the rotation of the special-shaped triangular rotor is arranged in the rotor accommodating cavity, the top of the rotor accommodating cavity is connected with an embedded sealing end cover through a flange, the bottom of the rotor accommodating cavity is provided with a hole for allowing the special-shaped triangular rotor to be communicated with the outside, an inner gear is fixed on the hole through a positioning notch, a round hole penetrating through the whole is arranged at the center of the special-shaped triangular rotor, a tubular extension is arranged in the round hole, an outer gear is arranged at the top end of the tubular extension, an eccentric shaft is inserted in the tubular extension, the eccentric shaft is formed by connecting a thick metal rod and a thin metal rod, the thin metal rod part of the eccentric shaft is connected with the tubular extension, the thick metal rod part of the eccentric shaft is driven by a motor through a coupler, and the outer gear is matched with the inner gear fixed at the bottom of the rotor accommodating cavity so as to ensure that the motor drives the special-shaped triangular rotor to move in the rotor accommodating cavity through the eccentric shaft And the embedded sealing end cover is provided with four through holes, the positions of the through holes are positioned at the top ends of four corners of the rotor accommodating cavity, the four through holes are respectively provided with two U-shaped heat exchange tube sets, each U-shaped heat exchange tube set comprises a hot end heat exchange tube and a cold end heat exchange tube, the front ends of the hot end heat exchange tube and the cold end heat exchange tube are connected with two adjacent through holes on the embedded sealing end cover, and the tail ends of the hot end heat exchange tube and the cold end heat exchange tube are provided with heat regenerators for connecting the hot end heat exchange tube and the cold end heat exchange tube.
The space connection part of the embedded sealing end cover and the space connection part for accommodating the special-shaped triangular rotor is provided with a bulge matched with a rotating space interface, and a sealing rubber ring is arranged between the embedded sealing end cover and the rotor accommodating cavity.
The cross section of the special-shaped triangular rotor is of an eccentric cycloid structure, and a parameter equation specifically solved on an xOy plane rectangular coordinate system is as follows:
x＝r cosθ+L cos(0.25θ)
y＝r sinθ+L sin(0.25θ)
in the formula, r is the radius of an eccentric circle, L is the length of a cycloid, theta is an angle on a coordinate system, and when the angle is changed from 0-1440 degrees, the generated shape is the section of the special-shaped triangular rotor;
the outline of the special-shaped triangular rotor is that a cycloid extends at a point on the radius, the deflection angle of a straight line is 1/4 of the angle of the circle, the cycloid rotates 4 circles on an eccentric circle, and the cycloid can rotate one circle to form a closed curve, namely the section outline of the special-shaped triangular rotor; the distance between the centers of the two thick metal rods and the two thin metal rods of the eccentric shaft is the radius of the circle when the rotor is generated.
The rotor accommodating cavity is always divided into four independent working cavities by the special-shaped triangular rotor and is connected with the heat regenerator through a cold end heat exchange tube, a hot end heat exchange tube and the heat regenerator; the cylinder wall is provided with sharp top ends between every two adjacent independent working chambers of the independent working chambers, so that four sharp top ends are formed totally, the special-shaped triangular rotor is always contacted with one sharp top end in the working process of the rotor accommodating chamber, and when the special-shaped triangular rotor rotates, each independent part can realize continuous periodic change of the volume.
The gear ratio of the inner gear to the outer gear is 4: 3; the special-shaped triangular rotor revolves around the center for 1 circle, rotates for 1/3 circles, and under the constraint of the internal gear and the external gear, the profile of the special-shaped triangular rotor eccentrically rotates, the eccentric rotation radius is the circular radius used when the rotor profile is generated, and the envelope line swept by the profile of the special-shaped triangular rotor in rotation is matched with the shape of the rotor accommodating cavity.
A working method of a rotor type Stirling refrigerator comprises the following steps:
the special-shaped triangular rotor is arranged in a rotor accommodating cavity, a large round shaft end of an eccentric shaft is connected with a motor through a coupler, a small round shaft end is connected with a tubular extension of the special-shaped triangular rotor, an embedded sealing end cover cavity is arranged in the cavity and sealed, two U-shaped heat exchange tube sets are connected to divide the rotor accommodating cavity into two corresponding groups, the two groups of cavities reciprocate in two independent cavities communicated through the U-shaped heat exchange tube sets along with the rotation of the special-shaped triangular rotor, helium is extruded along with the rotation of the special-shaped triangular rotor in an independent cavity on one side, heat is released through a heat exchange tube on a hot end and then passes through a heat regenerator, the heat is regenerated and then flows through the heat exchange tube on the cold end, and the independent cavity connected with the heat exchange tube on the cold end drives the helium to expand and cool at the cold end along with the rotation of the special-shaped triangular rotor; the circulation process of the helium working medium in the refrigerator is as follows: the independent cavity connected with the hot end heat exchange tube → the heat regenerator → the cold end heat exchange tube → the independent cavity connected with the cold end heat exchange tube → the heat regenerator → the hot end heat exchange tube → the independent cavity connected with the hot end heat exchange tube work in a circulating and reciprocating way.
When the rotor revolves in the rotor accommodating cavity for 1 week, the rotor rotates 1/3 weeks, and the rotor does work once on one independent cavity and does work four times on four independent cavities; the rotor rotates for a circle and does three times of work for an independent cavity.
Has the advantages that:
the invention improves the characteristics of the piston type operation of the existing Stirling engine, designs the rotor of the Stirling engine, and realizes Stirling refrigeration cycle through the rotation of the rotor. Compared with the existing refrigerating machine, the Stirling refrigerating machine has no throttling process in the conventional compressed gas refrigerating cycle process, so that no gas throttling loss exists in the cycle. The Stirling refrigerating machine can achieve Carnot efficiency at the same temperature of a cold end and a hot end under ideal conditions, is more energy-saving on the premise of achieving the same refrigerating capacity, and can output more refrigerating capacity under the condition of inputting the same work capacity. And the working medium in the Stirling engine does not have a gas-liquid phase change process during working, so that substances such as Freon and the like which destroy the atmosphere are not required to be used as working media, and the environment-friendly stable gas working media such as helium, nitrogen and the like can be flexibly reloaded according to the low temperature difference which is required to be refrigerated. In the field of liquefaction of gases such as liquid nitrogen, liquid hydrogen, liquid oxygen and the like, a refrigerator and the like are required to reach a low-temperature range of 30K to 200K. The Stirling refrigerator is easy to realize the refrigeration of the low-temperature region, and the rotor type Stirling refrigerator can quickly realize the refrigeration of the low-temperature region by utilizing high-power input.
Drawings
FIG. 1 is a schematic view of a rotor type Stirling refrigerator according to the present invention;
FIG. 2 is an exploded view of a rotor type Stirling cooler of the present invention;
FIG. 3 is a view of the rotor and cavity of the present invention installed in combination;
FIG. 4 is a schematic view of the gerotor mating of the present invention;
FIG. 5 is a schematic view of the attachment of a rotor to a cavity according to the present invention;
FIG. 6 is a schematic view of a structure of an end cover with embedded seal according to the present invention;
FIG. 7 is a schematic structural view of a sealing rubber ring according to the present invention;
FIG. 8 is a schematic view of the rotor in different positions of the present invention;
FIG. 9 is a schematic view of the inner gear fixing position at the bottom of the rotor accommodating cavity according to the present invention;
FIG. 10 is a schematic view of an internal gear configuration of the present invention;
FIG. 11 is a schematic view of the eccentric shaft structure of the present invention.
In the figure: the heat exchanger comprises a heat regenerator 1, a cold end heat exchange tube 2, an embedded sealing end cover 3, a rotor containing cavity 4, a sealing rubber ring 5, a hot end heat exchange tube 6, a special-shaped triangular rotor 7, an external gear 8, an internal gear 9 and an eccentric shaft 10.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
as shown in fig. 1 and 2, a rotor-type stirling cryocooler of the present invention is characterized in that: the special-shaped triangular rotor comprises a special-shaped triangular rotor 7, the special-shaped triangular rotor 7 is arranged in a rotor containing cavity 4, a space for containing the special-shaped triangular rotor 7 to rotate is arranged in the rotor containing cavity 4, the top of the rotor containing cavity 4 is connected with an embedded sealing end cover 3 through a flange, the bottom of the rotor containing cavity is provided with a hole for allowing the special-shaped triangular rotor 7 to be communicated with the outside, the joint of the embedded sealing end cover 3 and the space for containing the special-shaped triangular rotor 7 to rotate is provided with a bulge matched with the rotating space interface, a sealing rubber ring 5 is arranged between the embedded sealing end cover 3 and the rotor containing cavity 4, an inner gear 9 is fixed on the hole through a positioning notch, the schematic diagram of the positioning notch is shown in figures 9 and 10, a round hole penetrating through the whole is arranged at the center of the special-shaped triangular rotor 7, a tubular extension is arranged in the round hole, an outer gear 8 is arranged at the top end of the tubular extension, and an eccentric shaft 10 is inserted in the tubular extension, as shown in fig. 11, the eccentric shaft 10 is formed by connecting two thick metal rods and two thin metal rods, the thin metal rod part of the eccentric shaft 10 is connected with the tubular extension, the thick metal rod part of the eccentric shaft 10 is driven by a motor through a coupler, the external gear 8 is matched with the internal gear 9 fixed at the bottom end of the rotor accommodating cavity 5 so as to ensure that the motor drives the special-shaped triangular rotor 7 to move in the rotor accommodating cavity 4 through the eccentric shaft 10, the embedded sealing end cover 3 is provided with four through holes, the positions of the through holes are located at the top ends of four corners of the rotor accommodating cavity 4, the four through holes are respectively provided with two U-shaped heat exchange tube sets, each U-shaped heat exchange tube set comprises a hot end heat exchange tube 6 and a cold end heat exchange tube 2, the front ends of the hot end heat exchange tube 6 and the cold end heat exchange tube 2 are connected with two adjacent through holes on the embedded sealing end cover 3, and the tail ends of the hot end heat exchange tube 6 and the cold end heat exchange tube 2 are provided with a heat regenerator 1 for connecting the two heat exchange tubes.
The cross section of the special-shaped triangular rotor 7 is of an eccentric cycloid structure, and a parameter equation specifically solved on an xOy plane rectangular coordinate system is as follows:
x＝r cosθ+L cos(0.25θ)
y＝r sinθ+L sin(0.25θ)
in the formula, r is the radius of an eccentric circle, L is the length of a cycloid, theta is an angle on a coordinate system, and when the angle is changed from 0 degree to 1440 degrees, the generated shape is the section of the special-shaped triangular rotor 7;
the outline of the special-shaped triangular rotor 7 is that a cycloid extends at a point on the radius, the deflection angle of a straight line is 1/4 of the angle of the circle, the cycloid rotates 4 circles on the eccentric circle, and the cycloid can rotate one circle to form a closed curve, namely the section outline of the special-shaped triangular rotor 7; as shown in fig. 11, the distance between the centers of two thick and thin metal rods of the eccentric shaft 10 is the radius of the circle when the rotor is generated.
As shown in fig. 3-8, the rotor accommodating cavity 5 is always divided into four independent working cavities by the special-shaped triangular rotor 7, and is connected with the heat regenerator 1 through the cold end heat exchange tube 5 and the hot end heat exchange tube 6; sharp top ends are formed between every two adjacent independent working cavities of the independent working cavities on the cylinder wall, four sharp top ends are formed totally, the special-shaped triangular rotor 7 is always contacted with one sharp top end in the working process of the rotor accommodating cavity 5, and when the special-shaped triangular rotor 7 rotates, continuous periodic change of the volume can be realized by each independent part.
As shown in fig. 10, the gear ratio of the internal gear 9 to the external gear 8 is 4: 3; the irregular triangular rotor 7 revolves around the center for 1 circle, rotates for 1/3 circles, the outline of the irregular triangular rotor 7 eccentrically rotates under the constraint of the internal gear 9 and the external gear 8, the eccentric rotation radius is a circular radius used when the outline of the rotor is generated, and the envelope line swept by the outline of the irregular triangular rotor 7 in rotation is matched with the shape of the rotor accommodating cavity 5.
A working method of a cavity structure of a rotor type Stirling refrigerator comprises the following steps:
the special-shaped triangular rotor 7 is arranged in the rotor containing cavity 4, the large round shaft end of the eccentric shaft 10 is connected with a motor through a coupler, the small round shaft end is connected with a tubular extension of the special-shaped triangular rotor 7, an embedded sealing end cover 3 is arranged for sealing in the cavity, the two U-shaped heat exchange tube sets are connected to divide the rotor containing cavity 4 into two corresponding groups, the two groups of cavities reciprocate in two independent cavities communicated through the U-shaped heat exchange tube sets along with the rotation of the special-shaped triangular rotor 7, helium is extruded along with the rotation of the special-shaped triangular rotor 7 in the independent cavity at one side, flows through the hot end heat exchange tube 6 to emit heat and then returns back through the heat regenerator 1, and flows through the cold end heat exchange tube 2 after returning heat, the independent cavity connected with the cold end heat exchange tube 2 rotates along with the special-shaped triangular rotor 7 to drive helium to expand and cool at the cold end heat exchange tube 2; the circulation process of the helium working medium in the refrigerator is as follows: the independent cavity connected with the hot end heat exchange tube 6 → the heat regenerator 1 → the cold end heat exchange tube 2 → the independent cavity connected with the cold end heat exchange tube 2 → the heat regenerator 1 → the hot end heat exchange tube 6 → the independent cavity connected with the hot end heat exchange tube 6 work in a reciprocating mode.
When in use, the rotor revolves in the rotor accommodating cavity 4 for 1 week, the rotor rotates 1/3 weeks, the rotor does work once on one independent cavity and does work four times on four independent cavities; the rotor rotates for a circle and does three times of work for an independent cavity.
The motor connected with the eccentric shaft is started, the motor rotates to drive the eccentric shaft to rotate to provide an eccentric distance for the special-shaped triangular rotor, the eccentric distance rotates around the center of the shaft, the outer gear at the extending part of the special-shaped triangular rotor is meshed with the inner gear fixed at the bottom of the cavity to restrain the rotation angle of the special-shaped triangular rotor, when the special-shaped triangular rotor rotates in the rotor accommodating cavity, the edge part of the rotor is always in contact with four protrusions in the cavity, the inside of the rotor accommodating cavity is always divided into four independent cavities, and the rotating posture at each moment is shown in figure 8.
Under different rotation gestures, the volumes of two adjacent cavity groups change along with the rotation of the special-shaped triangular rotor, the special-shaped triangular rotor eccentrically rotates in the accommodating cavity to influence the volume change of each independent cavity, and the four independent cavities have consistent change rules and differ by a quarter period. After two adjacent cavities are connected, the helium working medium is compressed by the rotation of the rotor to be heated and release heat to the outside, so that the gas is expanded and cooled to release cold to the outside; the rotor continuously rotates, and the working medium is compressed in the cavity to release heat and expand to absorb heat to complete the cycle in a reciprocating manner; a semi-circular tube type heat regenerator (1) is arranged between the two heat exchange tubes to complete the heat regeneration process in the Stirling refrigeration cycle. The working principle of the refrigeration cycle of the rotor type Stirling refrigerator is basically consistent with that of the alpha Stirling refrigerator. The alpha-type Stirling machine is a classical prototype machine for realizing Stirling power cycle or Stirling refrigeration cycle, and comprises two moving pistons, piston cylinders, a cold end heat exchanger, a hot end heat exchanger and a heat regenerator. The condensing section provides cooling water, and the eccentric shaft is driven to rotate by the input work of the motor to drive the rotor to apply work to helium in the refrigerator to complete refrigeration cycle.
Claims (6)
1. A rotor-type stirling cooler, comprising: the special-shaped triangular rotor comprises a special-shaped triangular rotor (7), the special-shaped triangular rotor (7) is arranged in a rotor accommodating cavity (4), a space for accommodating the special-shaped triangular rotor (7) to rotate is arranged in the rotor accommodating cavity (4), the top of the rotor accommodating cavity (4) is connected with an embedded sealing end cover (3) through a flange, a hole allowing the special-shaped triangular rotor (7) to be communicated with the outside is formed in the bottom of the rotor accommodating cavity, an inner gear (9) is fixed on the hole through a positioning gap, a round hole penetrating through the whole is formed in the center of the special-shaped triangular rotor (7), a tubular extension is arranged in the round hole, an outer gear (8) is arranged outside the top end of the tubular extension, an eccentric shaft (10) is inserted in the tubular extension, the eccentric shaft (10) is formed by connecting two metal rods with one thick and one thin, the thin metal rod part of the eccentric shaft (10) is connected with the tubular extension, and the thick metal rod part of the eccentric shaft (10) is driven by a motor through a coupler, the outer gear (8) is matched with the inner gear (9) fixed at the bottom end of the rotor accommodating cavity (4) so as to ensure that a motor drives the special-shaped triangular rotor (7) to be always attached to the rotor accommodating cavity (4) when the motor moves in the rotor accommodating cavity (4) through the eccentric shaft (10), four through holes are formed in the embedded sealing end cover (3), the positions of the through holes are located at the top ends of four corners of the rotor accommodating cavity (4), two U-shaped heat exchange tube sets are respectively arranged on the four through holes, each U-shaped heat exchange tube set comprises a hot end heat exchange tube (6) and a cold end heat exchange tube (2), the front ends of the hot end heat exchange tube (6) and the cold end heat exchange tube (2) are connected with two adjacent through holes in the embedded sealing end cover (3), and the tail ends of the hot end heat exchange tube (6) and the cold end heat exchange tube (2) are provided with a heat regenerator (1) for connecting the hot end heat exchange tube (6) and the cold end heat exchange tube (2);
the rotor accommodating cavity (4) is always divided into four independent working cavities by the special-shaped triangular rotor (7) and is connected with the heat regenerator (1) through the cold end heat exchange tube (2) and the hot end heat exchange tube (6); sharp tops are formed between every two adjacent independent working chambers of the independent working chambers on the cylinder wall, four sharp tops are formed totally, the special-shaped triangular rotor (7) is always contacted with one sharp top in the working process of the rotor accommodating chamber (4), and when the special-shaped triangular rotor (7) rotates, each independent part can realize continuous periodic change of the volume.
2. A rotor-type stirling cooler in accordance with claim 1, wherein: the space connection part of the embedded sealing end cover (3) and the space connection part for accommodating the special-shaped triangular rotor (7) is provided with a bulge matched with a rotating space interface, and a sealing rubber ring (5) is arranged between the embedded sealing end cover (3) and the rotor accommodating cavity (4).
3. A rotor-type stirling cooler in accordance with claim 1, wherein: the cross section of the special-shaped triangular rotor (7) is of an eccentric cycloid structure, and a parameter equation specifically solved on an xOy plane rectangular coordinate system is as follows:
in the formula, r is the radius of an eccentric circle, L is the length of a cycloid, theta is an angle on a coordinate system, and when the angle is changed from 0 degree to 1440 degrees, the generated shape is the section of the special-shaped triangular rotor (7);
the outline of the special-shaped triangular rotor (7) is that a cycloid extends at a point on the radius, the deflection angle of a straight line is 1/4 of the angle of an eccentric circle, the cycloid rotates 4 circles on the eccentric circle, and the cycloid can rotate one circle to form a closed curve, namely the section outline of the special-shaped triangular rotor (7); the distance between the centers of two thick metal rods and two thin metal rods of the eccentric shaft (10) is the radius of the circle when the rotor is generated.
4. A rotor-type stirling cooler in accordance with claim 1, wherein: the gear ratio of the inner gear (9) to the outer gear (8) is 4: 3; the special-shaped triangular rotor (7) revolves around the center for 1 circle, rotates for 1/3 circles, under the constraint of the internal gear (9) and the external gear (8), the outline of the special-shaped triangular rotor (7) rotates eccentrically, the eccentric rotation radius is the circular radius used when the rotor outline is generated, and the envelope line swept by the outline of the special-shaped triangular rotor (7) in rotation is matched with the shape of the rotor accommodating cavity (4).
5. A method of operating a stirling cooler using a rotor-type stirling cooler in accordance with claim 1, comprising the steps of:
the special-shaped triangular rotor (7) is installed in the rotor containing cavity (4), the large circular shaft end of the eccentric shaft (10) is connected with a motor through a coupler, the small circular shaft end is connected with a tubular extension of the special-shaped triangular rotor (7), an embedded sealing end cover (3) is installed for sealing in the cavity, the two U-shaped heat exchange tube sets are connected to divide the rotor containing cavity (4) into two corresponding groups, the two groups of cavities are provided with two U-shaped heat exchange tube sets filled with helium working media, the helium reciprocates in two independent cavities communicated through the U-shaped heat exchange tube sets along with the rotation of the special-shaped triangular rotor (7), the helium is extruded along with the rotation of the special-shaped triangular rotor (7) in the independent cavity on one side, the helium flows through the heat regenerator (1) for heat regeneration after flowing through the hot end heat exchange tubes (6) for heat release, flows through the cold end heat exchange tubes (2) after heat regeneration, and the independent cavity connected with the cold end heat exchange tubes (2) drives the helium to expand and cool at the cold end (2) along with the rotation of the special-shaped triangular rotor (7) Cooling; the circulation process of the helium working medium in the refrigerator is as follows: the independent cavity connected with the hot end heat exchange tube (6) → regenerator (1) → cold end heat exchange tube (2) → independent cavity connected with the cold end heat exchange tube (2) → regenerator (1) → hot end heat exchange tube (6) → independent cavity connected with the hot end heat exchange tube (6) so that the independent cavity can work in a reciprocating mode.
6. The method of operation of claim 5, wherein: when the rotor revolves in the rotor accommodating cavity (4) for 1 week, the rotor rotates 1/3 weeks, and the rotor does work once on one independent cavity and does work four times on four independent cavities; the rotor rotates for a circle and does three times of work for an independent cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010977295.3A CN112066584B (en) | 2020-09-17 | 2020-09-17 | Rotor type Stirling refrigerator and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010977295.3A CN112066584B (en) | 2020-09-17 | 2020-09-17 | Rotor type Stirling refrigerator and working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112066584A CN112066584A (en) | 2020-12-11 |
| CN112066584B true CN112066584B (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010977295.3A Active CN112066584B (en) | 2020-09-17 | 2020-09-17 | Rotor type Stirling refrigerator and working method |
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| CN (1) | CN112066584B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800526A (en) * | 1970-04-03 | 1974-04-02 | Daimler Benz Ag | Hot gas engine constructed as rotary piston engine |
| US4179890A (en) * | 1978-04-04 | 1979-12-25 | Goodwin Hanson | Epitrochoidal Stirling type engine |
| JPH03286170A (en) * | 1990-03-30 | 1991-12-17 | Mazda Motor Corp | External combustion type rotary piston engine |
| CN101300417A (en) * | 2005-09-06 | 2008-11-05 | 达芬奇株式会社 | Rotary heat engine |
-
2020
- 2020-09-17 CN CN202010977295.3A patent/CN112066584B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800526A (en) * | 1970-04-03 | 1974-04-02 | Daimler Benz Ag | Hot gas engine constructed as rotary piston engine |
| US4179890A (en) * | 1978-04-04 | 1979-12-25 | Goodwin Hanson | Epitrochoidal Stirling type engine |
| JPH03286170A (en) * | 1990-03-30 | 1991-12-17 | Mazda Motor Corp | External combustion type rotary piston engine |
| CN101300417A (en) * | 2005-09-06 | 2008-11-05 | 达芬奇株式会社 | Rotary heat engine |
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| CN112066584A (en) | 2020-12-11 |
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