CN214707473U

CN214707473U - External fixed component external structure of Stirling refrigerator

Info

Publication number: CN214707473U
Application number: CN202023023614.1U
Authority: CN
Inventors: 吕志玲; 李传炉; 朱杰; 王猛波
Original assignee: Ningbo Xinstirling Cryogenic Equipment Co ltd
Current assignee: Ningbo Xinstirling Cryogenic Equipment Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-11-12
Anticipated expiration: 2030-12-16

Abstract

The utility model provides an external structure of subassembly is decided outward to stirling refrigerator, includes the casing and decides the subassembly outward, decide the subassembly outward and include electromagnetic core and the excitation coil of winding on electromagnetic core, its characterized in that: the electromagnetic iron core is coaxially sleeved outside the shell; electromagnetic core includes outer stator and cylindric skeleton, outer stator includes that the multiunit is by the silicon steel sheet group that a plurality of vertical silicon steel sheet coincide formed, and the even spacer ring in multiunit silicon steel sheet group is established in the periphery of skeleton, silicon steel sheet group and skeleton form the first space that is used for holding excitation coil between the butt joint side, excitation coil winding just is located first space on the skeleton. The external structure of the external fixed component of the Stirling refrigerator can quickly dissipate heat.

Description

External fixed component external structure of Stirling refrigerator

Technical Field

The utility model relates to a stirling refrigerator technical field, concretely relates to stirling refrigerator decides external structure of subassembly outward.

Background

Chinese utility model patent No. CN100404837C discloses a stirling cycle engine, which has a structure as shown in fig. 1, and includes a housing 1a composed of a cylindrical portion 2a and a main cylindrical portion 3a, a cylinder 7a is coaxially inserted into the cylindrical portion 2a, the cylinder 7a extends downward into the main cylindrical portion 3a, an ejector 8a capable of axially sliding is provided in the upper end of the cylinder 7a, a piston 15a capable of axially sliding is provided in the lower end, a regenerator 10a is provided between the inner circumferential surface of the cylindrical portion 2a and the outer circumferential surface of the cylinder 7a, an expansion chamber E is formed between the top end of the ejector 8a and the top end 6a of the cylindrical portion 2a, and a compression chamber C is formed between the bottom end of the ejector 8a and the top end of the piston 15 a; the main cylinder part 3a is also internally provided with a driving mechanism 16a for driving the piston 15a to axially slide, the driving mechanism 16a comprises an external fixed component, an internal fixed component and a short cylindrical magnetic conduction part 20a, the external fixed component comprises an electromagnetic core 24a and an annular excitation coil 19a, the internal fixed component comprises a short cylindrical support body 17a and a short cylindrical permanent magnet 18a, the support body 17a is installed in the main cylinder part 3a and coaxially sleeved outside the outer peripheral surface of the cylinder 7a, the bottom of the support body 17a is also connected with the bottom of the piston 15a through a connecting body 40a, the permanent magnet 18a is fixedly arranged on the inner peripheral surface of the support body 17a, the magnetic conduction part 20a is fixed on the outer peripheral surface of the cylinder and is clamped between the cylinder 7a and the permanent magnet 18a, the electromagnetic core 24a is installed in the main cylinder part 3a and coaxially sleeved outside the support body 17a, the exciting coil 19a is wound on the electromagnet core 24 a; a rod member 22a and a leaf spring assembly, wherein the piston 15a is provided with a shaft hole 41a, the rod member 22a is inserted into the shaft hole 41a of the piston 15a in a vertically sliding manner, the leaf spring assembly comprises a first leaf spring 21a for controlling the action of the piston 15a and a second leaf spring 23a for controlling the action of the ejector 8a, the second leaf spring 23a is arranged below the first leaf spring 21a and is positioned right below the piston 15a, the center of the first leaf spring 21a is connected with the bottom of the piston, the lower end of the rod member 22a is connected with the center of the second leaf spring 23a, the upper end is connected with the center of the bottom of the ejector 8a, two sides of the cylinder 7a are fixed in the housing through brackets 26a, the brackets 26a are provided with vertical connecting arms 30a on one sides of the first leaf spring 21a and the second leaf spring 23a, and the first leaf spring 21a and the second leaf spring 23a are connected with the connecting arms 30a on the side, the cylinder 7a is molded by a metal such as aluminum and is integrally formed with the bracket 26a and the connecting arm 30a in the housing 1 a.

The working principle of the stirling cycle engine is as follows: when alternating current flows through the exciting coil 19a, the exciting coil 19a generates an alternating magnetic field, concentrated in the electromagnet core 24a, by which a force to reciprocate the permanent magnet 18a in the axial direction is generated, and the piston 15a is also caused to reciprocate in the axial direction in the cylinder 7a because the piston 15a is connected to the support body 17a to which the permanent magnet 18a is fixed; when the piston 15a moves in a direction approaching the ejector 8a, the gas in the compression chamber C is compressed and reaches the expansion chamber E, the ejector 8a is pushed down with a predetermined phase difference with respect to the piston 15a, whereas when the piston 15a moves in a direction away from the ejector 8a, the inside of the compression chamber C becomes negative pressure, the gas in the expansion chamber E flows back to the compression chamber C, and the ejector 8a is pushed up with a predetermined phase with respect to the piston 15 a; in this process, 2 reversible cycles consisting of isothermal change and isometric change are performed, so that the vicinity of the expansion chamber E becomes low temperature and the vicinity of the compression chamber C becomes high temperature.

However, the existing Stirling refrigerator has the following technical problems: because the exciting coil 19a through alternating current can produce a large amount of heats, and the current external subassembly of deciding including electromagnet core 24a and exciting coil 19a sets up in the casing for the heat that exciting coil 19a produced can not directly be dispelled fast, leads to the heat to gather easily, and the heat gathers and can lead to the inside temperature of casing to rise again, and the inside permanent magnet 18a of casing can the demagnetization after the temperature exceeds 120, consequently can lead to permanent magnet 18a can not normally work, thereby influence product working property, shorten product life.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the external fixed component external structure of the Stirling refrigerator capable of dissipating heat quickly is provided.

The technical solution of the utility model is that: the utility model provides an external structure of subassembly is decided outward to stirling refrigerator, includes the casing and decides the subassembly outward, decide the subassembly outward and include electromagnetic core and the excitation coil of winding on electromagnetic core, its characterized in that: the electromagnetic iron core is coaxially sleeved outside the shell.

After the method is adopted, the utility model has the advantages that:

the utility model discloses stirling refrigerator decides external structure of subassembly outward will include electromagnetic core and excitation coil decide the subassembly setting outward outside the casing outward for the heat that excitation coil produced can directly give off the outside fast, and can not gather inside the casing, thereby makes the inside temperature of casing can not be too high, can not lead to inside permanent magnet demagnetization, and product working property is more stable, and product life is longer.

Preferably, the electromagnetic core is coaxially sleeved outside the shell through welding. The arrangement can ensure that the electromagnetic iron core is reliably fixed outside the shell.

As preferred, electromagnetic core includes outer stator and cylindric skeleton, outer stator includes the silicon steel sheet group that the multiunit formed by the coincide of a plurality of vertical silicon steel sheets, and the even spacer ring in multiunit silicon steel sheet group is established on the periphery of skeleton, silicon steel sheet group and skeleton form the first space that is used for holding excitation coil between the butt joint side, excitation coil winding just is located first space on the skeleton. This setting can make excitation coil's installation more convenient, and adopts the silicon steel sheet can improve the resistance in vortex return circuit, reduces the eddy current loss, and it is better to gather the magnetism effect.

Preferably, the skeleton is made of a stainless steel material. The stainless steel can resist the high temperature of the magnet exciting coil, has good insulating property and is convenient to machine and form.

Preferably, the shell comprises an upper shell and a lower shell which are mutually covered, and further comprises an air cylinder and an inner fixed assembly, the cylinder is coaxially arranged in the upper shell, the lower end of the cylinder extends into the lower shell, the upper end of the cylinder is internally provided with a discharger, a piston is arranged in the lower end of the cylinder, the inner fixed assembly is arranged in the lower shell and comprises a short cylindrical supporting body, a short cylindrical permanent magnet and a short cylindrical inner stator, the supporting body is coaxially sleeved outside the outer peripheral surface of the cylinder, the bottom of the supporting body is also connected with the bottom of the piston through a connecting body, the permanent magnet is fixedly arranged on the inner circumferential surface of the supporting body, the inner stator is fixedly arranged on the outer circumference of the air cylinder and is clamped between the air cylinder and the permanent magnet, the inner stator is made of composite soft magnetic materials, and the electromagnetic iron core is coaxially sleeved outside the lower shell and corresponds to the inner stator assembly in position. This setting not only utilizes the silicon steel sheet of external fixed subassembly to gather magnetism, still utilizes the interior stator of interior fixed subassembly to gather magnetism, gathers magnetism effect better.

Preferably, the piston further comprises a rod and a spring assembly, the piston is provided with a shaft hole, the rod is inserted into the shaft hole of the piston in a vertically sliding manner, the spring assembly comprises a spring seat arranged at the bottom of the lower shell and positioned right below the piston, a first spring used for controlling the piston to act and a second spring used for controlling the ejector to act, the first spring and the second spring are coaxially arranged on the spring seat, the first spring is positioned outside the second spring, the bottom of the piston is provided with a second space used for accommodating the first spring and the second spring, the lower end of the first spring is abutted against the spring seat, the upper end of the first spring is abutted against the bottom of the piston, the lower end of the rod is abutted against the upper end of the second spring, and the other end of the rod is connected with the bottom center of the ejector after penetrating through the shaft hole of the piston. The spring structure is adopted to replace the existing plate spring structure, so that the first spring and the second spring can be coaxially arranged together, a complex fixing structure required by the plate spring structure can be omitted, and the overall structure is simpler and more compact.

Description of the drawings:

FIG. 1 is a cross-sectional view of a prior art Stirling cycle engine;

FIG. 2 is a cross-sectional view of the external structure of the external fixed component of the Stirling refrigerator of the present invention;

fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

In the prior art figures: 1 a-housing, 2 a-cylindrical part, 3 a-main cylindrical part, 4 a-connecting body, 5 a-shaft hole, 6 a-top of cylindrical part, 7 a-cylinder, 8 a-ejector, 10 a-regenerator, 15 a-piston, 16 a-driving mechanism, 17 a-supporting body, 18 a-permanent magnet, 19 a-excitation coil, 20 a-magnetic conductive part, 21 a-first plate spring, 22 a-rod, 23 a-second plate spring, 24 a-electromagnetic core, 26 a-bracket, 30 a-connecting arm, C-compression chamber, E-expansion chamber.

The utility model discloses in the figure: 1-shell, 2-outer fixed component, 3-electromagnetic core, 4-excitation coil, 5-outer stator, 6-framework, 7-first space, 8-upper shell, 9-lower shell, 10-cylinder, 11-inner fixed component, 12-ejector, 13-piston, 14-supporting body, 15-permanent magnet, 16-inner stator, 17-connecting body, 18-rod piece, 19-spring component, 20-shaft hole, 21-spring seat, 22-first spring, 23-second spring, 24-second space, and 25-bracket.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Example (b):

the utility model provides a stirling refrigerator decides external structure of subassembly outward, includes casing 1 and decides subassembly 2 outward, decide subassembly 2 outward including electromagnetic core 3 and the excitation coil 4 of winding on electromagnetic core 3, the coaxial cover of electromagnetic core 3 is established outside casing 1.

The utility model discloses stirling refrigerator decides external structure of subassembly 2 outward, will include electromagnetic core 3 and excitation coil 4 decides subassembly 2 setting outward outside casing 1 for the heat that excitation coil 4 produced can directly give off the outside fast, and can not gather in casing 1 is inside, thereby makes 1 inside temperature of casing can not be too high, can not lead to 15 degaussing of inside permanent magnet, and product working property is more stable, and product life is longer.

Preferably, the electromagnetic core 3 is coaxially sleeved outside the housing 1 by welding. This arrangement allows the electromagnet core 3 to be securely fixed outside the housing 1.

As preferred, electromagnetic core 3 includes outer stator 5 and cylindric skeleton 6, outer stator 5 includes the silicon steel sheet group that the multiunit formed by the coincide of a plurality of vertical silicon steel sheets, and the even spacer ring in multiunit silicon steel sheet group is established on the periphery of skeleton 6, silicon steel sheet group and skeleton 6 form the first space 7 that is used for holding excitation coil 4 between the butt joint side, excitation coil 4 twines on skeleton 6 and is located first space 7. This setting can make excitation coil 4's installation more convenient, and adopts the silicon steel sheet can improve the resistance in vortex return circuit, reduces the eddy current loss, and it is better to gather the magnetism effect.

Preferably, the bobbin 6 is made of a stainless steel material. The stainless steel can resist the high temperature of the excitation coil 4, has good insulating property and is convenient for processing and forming.

Preferably, the housing 1 includes an upper housing 8 and a lower housing 9 which are covered with each other, and further includes a cylinder 10, and an inner stator assembly 11, the cylinder 10 is coaxially installed in the upper housing 8, and a lower end of the cylinder extends into the lower housing 9, the cylinder 10 is molded by a metal such as aluminum and can be integrally formed with a bracket 25 in the housing 1, an ejector 12 is installed in an upper end of the cylinder 10, a piston 13 is installed in a lower end of the cylinder 10, the inner stator assembly 11 is installed in the lower housing 9, the inner stator assembly 11 includes a short cylindrical support 14, a short cylindrical permanent magnet 15, and a short cylindrical inner stator 16, the support 14 is coaxially sleeved outside an outer circumferential surface of the cylinder 10, a bottom of the support 14 is further connected to a bottom of the piston 13 by a connecting body 17, the permanent magnet 15 is fixedly installed on an inner circumferential surface of the support 14, the inner stator 16 is fixedly installed on an outer circumferential surface of the cylinder 10 and is interposed between the cylinder 10 and the permanent magnet 15, the inner stator 16 is made of composite soft magnetic material, and the electromagnetic core 3 is coaxially sleeved outside the lower shell 9 and corresponds to the inner stator assembly 11 in position. This setting not only utilizes the silicon steel sheet of external fixed subassembly 2 to gather magnetism, still utilizes the interior stator 16 of interior fixed subassembly 11 to gather magnetism, gathers magnetism effect better.

Preferably, the piston further comprises a rod 18 and a spring assembly 19, the piston 13 is provided with a shaft hole 20, the rod member 18 is slidably inserted into a shaft hole 20 of the piston 13 up and down, the spring assembly 19 includes a spring seat 21 provided at the bottom of the lower housing 9 and located right below the piston 13, a first spring 22 for controlling the motion of the piston 13, and a second spring 23 for controlling the motion of the ejector 12, the first spring 22 and the second spring 23 are coaxially arranged on the spring seat 21, the first spring 22 is positioned outside the second spring 23, the bottom of the piston 13 is provided with a second space 24 for accommodating the first spring 22 and the second spring 23, the lower end of the first spring 22 is pressed against the spring seat 21, the upper end is pressed against the bottom of the piston 13, the lower end of the rod member 18 abuts against the upper end of the second spring 23, and the other end of the rod member passes through the shaft hole 20 of the piston 13 and then is connected with the bottom center of the ejector 12. The arrangement adopts a spring structure to replace the existing plate spring structure, so that the first spring 22 and the second spring 23 can be coaxially arranged together, the complex fixing structure required by the plate spring structure can be omitted, and the whole structure is simpler and more compact.

Claims

1. The utility model provides an external structure of subassembly is decided outward to stirling refrigerator, includes casing (1) and decides subassembly (2) outward, decide subassembly (2) outward including electromagnetic core (3) and excitation coil (4) of winding on electromagnetic core (3), its characterized in that: the electromagnetic iron core (3) is coaxially sleeved outside the shell (1).

2. A stirling cooler external stator assembly external arrangement according to claim 1, wherein: the electromagnetic iron core (3) is coaxially sleeved outside the shell (1) through welding.

3. A stirling cooler external stator assembly external arrangement according to claim 1, wherein: electromagnetic core (3) include outer stator (5) and cylindric skeleton (6), outer stator (5) include the silicon steel sheet group that the multiunit formed by a plurality of vertical silicon steel sheet coincide, and the even spacer ring in multiunit silicon steel sheet group is established in the periphery of skeleton (6), silicon steel sheet group and skeleton (6) form first space (7) that are used for holding excitation coil (4) between the butt joint side, excitation coil (4) winding just is located first space (7) on skeleton (6).

4. A stirling cooler external stator assembly external arrangement according to claim 3, wherein: the framework (6) is made of stainless steel materials.

5. A stirling cooler external stator assembly external arrangement according to claim 1, wherein: the shell (1) comprises an upper shell (8) and a lower shell (9) which are mutually covered, and further comprises a cylinder (10) and an inner fixed assembly (11), wherein the cylinder (10) is coaxially arranged in the upper shell (8), the lower end of the cylinder extends into the lower shell (9), an ejector (12) is arranged in the upper end of the cylinder (10), a piston (13) is arranged in the lower end of the cylinder (10), the inner fixed assembly (11) is arranged in the lower shell (9), the inner fixed assembly (11) comprises a short cylindrical support body (14), a short cylindrical permanent magnet (15) and a short cylindrical inner stator (16), the support body (14) is coaxially arranged outside the outer peripheral surface of the cylinder (10), the bottom of the support body (14) is also connected with the bottom of the piston (13) through a connecting body (17), and the permanent magnet (15) is fixedly arranged on the inner peripheral surface of the support body (14), the inner stator (16) is fixedly arranged on the outer circumference of the air cylinder (10) and clamped between the air cylinder (10) and the permanent magnet (15), the inner stator (16) is made of composite soft magnetic materials, and the electromagnetic iron core (3) is coaxially sleeved outside the lower shell (9) and corresponds to the inner positioning component (11).

6. A Stirling refrigerator external fixed assembly external arrangement according to claim 5, wherein: the piston type air compressor further comprises a rod piece (18) and a spring assembly (19), a shaft hole (20) is formed in the piston (13), the rod piece (18) can be inserted into the shaft hole (20) of the piston (13) in a vertically sliding mode, the spring assembly (19) comprises a spring seat (21) which is arranged at the bottom of the lower shell (9) and is located right below the piston (13), a first spring (22) used for controlling the action of the piston (13) and a second spring (23) used for controlling the action of the ejector (12), the first spring (22) and the second spring (23) are coaxially arranged on the spring seat (21), the first spring (22) is located on the outer side of the second spring (23), a second space (24) used for containing the first spring (22) and the second spring (23) is formed in the bottom of the piston (13), the lower end of the first spring (22) is abutted against the spring seat (21), the upper end of the rod piece (18) is propped against the bottom of the piston (13), the lower end of the rod piece (18) is propped against the upper end of the second spring (23), and the other end of the rod piece is connected with the bottom center of the discharger (12) after penetrating through the shaft hole (20) of the piston (13).