CN114484913A

CN114484913A - Single-structure high-temperature-difference vortex tube suitable for additive manufacturing

Info

Publication number: CN114484913A
Application number: CN202111673590.0A
Authority: CN
Inventors: 吴名
Original assignee: Suzhou Jiechuan Design Consulting Co ltd
Current assignee: Suzhou Jiechuan Design Consulting Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-13

Abstract

The invention belongs to the field of vortex tubes, and particularly relates to a single-structure high-temperature-difference vortex tube suitable for additive manufacturing. The device has no assembly requirement of parts, has no suspended dead angle in the same direction in the cavity for adapting to the material increase manufacturing process, optimizes the layout of each air chamber, breaks through the limitation on the pipe fitting manufacturing process in the material reduction manufacturing process, increases the cold and hot air pressure difference in the vortex tube, enlarges the proportion of cold and hot air flows, and improves the refrigeration coefficient so as to optimize the refrigeration efficiency of the vortex tube.

Description

Single-structure high-temperature-difference vortex tube suitable for additive manufacturing

Technical Field

The invention relates to the technical field of vortex tubes, in particular to a single-structure high-temperature-difference vortex tube suitable for additive manufacturing.

Background

As a cooling device almost without maintenance, a vortex tube always provides a reliable solution for a local efficient cooling scene required in industrial production, compressed air generated by an air compressor is generally used as power, and the compressed air can be separated in a cold-hot mode without being driven by a mechanical device inside and is discharged from two ends.

The main standard for measuring the performance of the vortex tube is the cooling efficiency ratio, and how to improve the efficiency of the vortex tube becomes a big issue under the same air supply condition. The prior vortex tube is limited by a plurality of processes in the traditional mechanical manufacturing, generally follows the requirement of material reduction processing during design, and is mostly of a structure assembled by important components such as a vortex generator (vortex rotating chamber), a vortex cavity, an air inlet pipe, a hot end tube, a cold end tube and the like. The design of an air passage is difficult to avoid a dead angle area with a 90-degree cross section, and the improvement of cold air flow is often subjected to a bottleneck, so that a single-structure high-temperature-difference vortex tube suitable for additive manufacturing is provided.

Disclosure of Invention

The invention provides a single-structure high-temperature-difference vortex tube suitable for additive manufacturing, which solves the problems in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a single structure high temperature difference vortex tube that is fit for vibration material disk, takes place the chamber including main vortex, the one end that the chamber was taken place to main vortex is equipped with primary vortex and takes place the chamber, is connected with the intake pipe rather than forming the acute angle on the lateral wall that the chamber was taken place to primary vortex, and primary vortex takes place the chamber and is close to the one end that main vortex takes place the chamber and is equipped with the rotatory guide path of a plurality of vortexes first, the rotatory guide path of vortexes second, and the one end that the chamber was taken place to primary vortex is equipped with the cold junction export, and the other end that the chamber was taken place to main vortex is equipped with hot air current restriction chamber, and the one end in hot air current restriction chamber is connected with the hot junction export through hot junction diffusion cavity.

It is worth to say that one end of the main vortex generating cavity close to the hot air flow limiting cavity is provided with a protrusion located at the center.

It is worth to say that a hot end narrow cavity for reducing backflow is arranged between the hot air flow limiting cavity and the hot end diffusion cavity.

It is worth to say that one end of the cold end outlet close to the primary vortex generating cavity is provided with a cold air end accelerating cavity with a cavity wall concave inwards.

Compared with the prior art, the invention has the beneficial effects that:

the device has no assembly requirement of components, no suspended dead angle exists in the same direction in the cavity body in order to adapt to the additive manufacturing process, 4-8 vortex rotation guide passages which are arranged in a radioactive mode are arranged at the tail end of the primary vortex generation cavity, and the vortex is guided to enter the main vortex generation cavity and then further obtain larger kinetic energy to be converted into internal energy;

the layout of each air chamber is optimized, the limitation on the pipe fitting manufacturing process in material reduction manufacturing is broken through, the cold and hot air pressure difference in the vortex tube is increased, the cold and hot air flow proportion is enlarged, and the refrigeration coefficient is improved, so that the refrigeration efficiency of the vortex tube is optimized.

Drawings

FIG. 1 is a side view of a single structure high temperature differential vortex tube suitable for additive manufacturing in accordance with the present invention;

FIG. 2 is a cutaway cross-sectional isometric view of the internal structure of a single structure high temperature differential vortex tube suitable for additive manufacturing in accordance with the present invention.

FIG. 3 is a cutaway isometric view of the internal plenum of a single structure high temperature differential vortex tube suitable for additive manufacturing in accordance with the present invention;

FIG. 4 is a schematic view of the inner gas flow direction of a single-structure high-temperature-difference vortex tube suitable for additive manufacturing according to the present invention;

FIG. 5 is a cross-sectional elevation view of a vortex tube of a single structure high temperature differential vortex tube suitable for additive manufacturing in accordance with the present invention.

In the figure: 1. an air inlet pipe; 11. compressing air; 2. a primary vortex generating chamber; 201. whirlwind; 21. a first vortex rotation guide passage; 22. a second vortex rotation guide passage; 3. a primary vortex generating chamber; 31. a protrusion; 301. a thermal eddy current; 302. cold vortex; 4. a hot gas flow confinement chamber; 5. a hot end narrow cavity; 51. a lead-out port; 6. a hot end diffusion cavity; 7. a hot end outlet; 8. a cold end outlet; 801. a cold air end accelerating cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, a single-structure high temperature difference vortex tube suitable for additive manufacturing comprises a main vortex generation cavity 3, a primary vortex generation cavity 2 is arranged at one end of the main vortex generation cavity 3, an air inlet tube 1 forming an acute angle with the side wall of the primary vortex generation cavity 2 is connected to the side wall of the primary vortex generation cavity 2, an air inlet channel of the air inlet tube 1 is continuously narrowed, a plurality of vortex rotation guide passages I21 and vortex rotation guide passages II 22 are arranged at one end of the primary vortex generation cavity 2, a cold end outlet 8 is arranged at one end of the cold end outlet 8 close to the primary vortex generation cavity 2, a cold air end acceleration cavity 801 with a concave cavity wall is arranged at one end of the cold end acceleration cavity, a hot air flow limiting cavity 4 is arranged at the other end of the main vortex generation cavity 3, a protrusion 31 located at the center is arranged at one end of the main vortex generation cavity 3 close to the hot air flow limiting cavity 4, and a hot end outlet 7 is connected to one end of the hot air flow limiting cavity 4 through a hot end diffusion cavity 6, a hot end narrow cavity 5 for reducing backflow is arranged between the hot air flow limiting cavity 4 and the hot end diffusion cavity 6.

When in work: compressed air 11 enters the primary vortex generating cavity 2 from the air inlet pipe 1 with the cross section gradually narrowed from the opening, so that the flow rate of the compressed air is further enhanced;

the compressed air 11 enters the primary vortex generating cavity 2 to form a cyclone 201, and an air inlet channel on the air inlet pipe 1 and the leading-in angle of the primary vortex generating cavity 2 form a non-vertical acute angle which is the initial guiding moving direction of the cyclone 201 in the primary vortex generating cavity 2, so that the cyclone 201 can rotate at an accelerated speed as much as possible;

then the mixed gas is sprayed out from 4-8 vortex rotation guide passages I21, vortex rotation guide passages II 22 and the like, and enters the main vortex generation cavity 3 along the tangential direction at the sound velocity;

the cyclone 201 is separated into a hot vortex 301 and a cold vortex 302, and the hot vortex 301 with smaller outside angular velocity enters the hot air flow limiting cavity 4 along the cavity wall;

meanwhile, when the cold vortex 302 with a high inner ring speed travels to the tail end of the main vortex generating cavity 3, the cold vortex is blocked by the bulge 31 and disturbs the vortex form, the pressure is increased, the cold vortex is reversely extruded out from a more central passage to the cold air end accelerating cavity 801 to be narrowed and accelerated, the cold air flow is increased, and the cold air is sprayed out from the cold end outlet 8;

the hot vortex 301 is wound on the outer side of the cavity and is close to the cavity wall, and enters the hot air limiting cavity 4 through the acute angle slit connected with the cavity wall, so that the hot air can be effectively prevented from reversely flowing back to influence the cooling efficiency, the hot vortex rotates at an accelerated speed and is sprayed out from the two opposite outlet ports 51, the hot vortex is firstly reduced to separate possible backflow of hot and cold vortex through the narrow cavity 5 with the narrow hot end, then is decelerated and silenced through the diffusion type hot end diffusion cavity 6, and finally is sprayed out from the hot end outlet 7.

The straight cylinder part of the hot end diffusion cavity 6 can be provided with a silencer and an airflow regulating valve according to the requirement to adapt to different cooling temperature requirements.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a single structure high temperature difference vortex tube that is fit for vibration material disk, takes place chamber (3) including main vortex, a serial communication port, the one end that chamber (3) took place for main vortex is equipped with primary vortex and takes place chamber (2), be connected with on the lateral wall of primary vortex takes place chamber (2) intake pipe (1) rather than forming the acute angle, primary vortex takes place that one end that chamber (2) are close to main vortex takes place chamber (3) is equipped with a plurality of vortex rotatory guide path one (21), vortex rotatory guide path two (22), the one end that chamber (2) were taken place for primary vortex is equipped with cold junction export (8), the other end that chamber (3) were taken place for main vortex is equipped with hot gas flow and restricts chamber (4), the one end that hot gas restricted chamber (4) is connected with hot junction export (7) through hot junction diffusion cavity (6).

2. The single structure high temperature difference vortex tube suitable for additive manufacturing according to claim 1, wherein one end of the main vortex generating chamber (3) close to the hot gas flow restriction chamber (4) is provided with a centrally located protrusion (31).

3. The single structure high temperature difference vortex tube suitable for additive manufacturing according to claim 1, characterized in that a hot end narrow cavity (5) for reducing backflow is arranged between the hot gas flow limiting cavity (4) and the hot end diffusion cavity (6).

4. The single-structure high-temperature-difference vortex tube suitable for additive manufacturing according to claim 1, wherein one end of the cold-end outlet (8) close to the primary vortex generating chamber (2) is provided with a cold-end accelerating chamber (801) with a concave chamber wall.