阅读说明：本技术 一种机架及自由活塞分置式斯特林制冷机 (kinds of stand and free piston separated type stirling refrigerator ) 是由 陈曦 梁天晓 倪贤灿 洪昊 张笑宇 于 2019-11-06 设计创作，主要内容包括：根据本发明的机架以及自由活塞分置式斯特林制冷机,机架包括法兰以及两个活塞管,两个活塞管分别设置在法兰上,对称分布于法兰的两侧,法兰呈圆盘状,两侧分别设置有第一圆盘、圆槽、第二圆盘、突起圆带,第一圆盘、圆槽、第二圆盘、突起圆带从小到大依次相邻设置,法兰的圆周上分别设有用于与连接管连接的第一凸台、用于充气口第二凸台以及用于接插件口的第三凸台,第一凸台、第二凸台、第三凸台相邻设置,活塞管具有圆柱形内腔,压缩活塞管的轴线与法兰的轴线共线,活塞管外壁上对称设置有内凹的进气槽,进气槽从自由端端部向法兰方向沿轴向设置,进气槽内设置有连通进气槽与活塞管内腔的通孔。(According to the rack and free piston separated Stirling refrigerator, the rack comprises a flange and two piston pipes, the two piston pipes are respectively arranged on the flange and symmetrically distributed on two sides of the flange, the flange is in a disc shape, th discs, circular grooves, second discs and protruding circular belts are respectively arranged on two sides of the flange, the th discs, the circular grooves, the second discs and the protruding circular belts are sequentially and adjacently arranged from small to large, a th boss used for being connected with a connecting pipe, a second boss used for an inflation inlet and a third boss used for a connector opening are respectively arranged on the circumference of the flange, the st bosses, the second bosses and the third bosses are adjacently arranged, the piston pipes are provided with cylindrical inner cavities, the axis of a compression piston pipe is collinear with the axis of the flange, concave air inlet grooves are symmetrically arranged on the outer wall of the piston pipe, the air inlet grooves are axially arranged from the free end to the flange, and through holes communicated with the inner cavities of the air inlet grooves and the piston.)

1, A frame for a compressor, comprising:

a flange; and

two piston pipes which are respectively arranged on the flange and symmetrically distributed on two sides of the flange,

wherein the flange is disc-shaped, the th disc, the circular groove, the second disc and the protruding circular belt are respectively arranged on two sides of the flange,

the th disc, the circular groove, the second disc and the protruding circular belt are arranged adjacently in sequence from small to big,

the circumference of the flange is respectively provided with a th lug boss used for being connected with the connecting pipe, a second lug boss used for the inflation inlet and a third lug boss used for the connector inlet,

the th boss, the second boss and the third boss are adjacently arranged,

the piston tube has a cylindrical lumen, the axis of the compression piston tube is collinear with the axis of the flange,

the outer wall of the piston pipe is symmetrically provided with concave air inlet grooves which are axially arranged from the end part of the free end to the flange direction,

and a through hole for communicating the air inlet groove with the inner cavity of the piston pipe is formed in the air inlet groove.

2. The frame of claim 1, wherein:

wherein the th disc is used for placing the inner yoke,

a fitting gap is formed between the circular groove and the second disk,

the protruding circular band is used for positioning the outer yoke iron.

3. The frame of claim 2, wherein:

wherein, the st boss is radially provided with a th through hole which communicates the outside with the inner cavity of the piston tube.

4. The frame of claim 2, wherein:

wherein the second boss is provided with an inflation through hole which is communicated with the assembly gap from the outside in the radial direction,

and a threading through hole for communicating the outside with the assembling gap is radially arranged on the third boss.

A free piston split Stirling cooler of the type 5, , comprising:

a compressor having a frame; and

an expander in communication with the compressor through a connecting pipe,

wherein the rack is the rack of any of claims 1-4.

6. The free-piston split-type stirling cooler of claim 5, wherein:

wherein the compressor further comprises two compression units,

the compression unit is provided with a compression piston, the compression piston is provided with a cylindrical inner cavity, an inwards concave annular groove and a plurality of concave cavities are formed in the outer wall of the compression piston, a throttling through hole communicated with the cylindrical inner cavity is formed in the concave cavity, and a vent hole communicated with the annular groove is formed in the end face of the opening end of the compression piston.

7. The free-piston split-type stirling cooler of claim 5, wherein:

the two compression pistons are respectively and symmetrically arranged in the cylindrical inner cavity of the piston tube, and the open ends of the two compression pistons are oppositely arranged.

8. The free-piston split-type stirling cooler of claim 5, wherein:

wherein the expander comprises an ejector, an ejector rod, a cold head, a cold end heat exchanger and an expansion cylinder,

the ejector end is connected to the expansion side plate spring through the ejector rod, and the other end is a free end.

9. A free piston split stirling cooler in accordance with claim 8 wherein:

the cold end heat exchanger is a slit type heat exchanger and is arranged inside the cold head and tightly attached to the inner wall of the cold head, and the cold end heat exchanger is in interference fit with the cold head.

10. A free piston split stirling cooler in accordance with claim 8 wherein:

wherein the ejector, the expansion cylinder and the cold head form an expansion chamber.

Technical Field

The invention belongs to the field of refrigeration, and particularly relates to an stand and free piston split type Stirling refrigerator.

Background

The last thirty years are the periods of rapid development in aerospace technology, infrared technology, atomic energy technology, superconducting technology, as well as in cryoelectronics, cryophysics, cryomedicine and cryobiology important branches of cryotechnology-cryocoolers have rapidly developed with the development of the above scientific technologies.

The theoretical refrigeration efficiency of the Stirling refrigerator is equal to Carnot efficiency, and the actual operation efficiency of the Stirling refrigerator is with the highest efficiency in all the low-temperature refrigerators at present.

The main problems of the space refrigerator are how to improve the efficiency and the service life of the refrigerator and reduce the vibration because the space refrigeration has strict requirements on energy consumption, service life and vibration.

Disclosure of Invention

It is an object of the present invention to provide motor mount and free piston split stirling cooler for linear compressor.

The invention provides racks, which are characterized by comprising flanges and two piston pipes, wherein the two piston pipes are respectively arranged on the flanges and symmetrically distributed on two sides of the flanges, the flanges are disc-shaped, the two sides are respectively provided with a disc, a circular groove, a second disc and a protruding circular belt, the disc, the circular groove, the second disc and the protruding circular belt are sequentially and adjacently arranged from small to large, the circumferences of the flanges are respectively provided with a boss used for being connected with a connecting pipe, a second boss used for an inflation inlet and a third boss used for a connector opening, the boss, the second boss and the third boss are adjacently arranged, the piston pipes are provided with cylindrical inner cavities, the axes of the compression piston pipes and the axes of the flanges are collinear, the outer walls of the piston pipes are symmetrically provided with concave air inlet grooves, the air inlet grooves are axially arranged from the free end parts to the flanges, and through holes communicated with the air inlet grooves and the inner cavities of the piston pipes are arranged in the.

In the rack provided by the invention, the rack can also be characterized in that the th disk is used for placing the inner yoke, the circular groove and the second disk have an assembly gap, and the protruding circular belt is used for positioning the outer yoke.

In addition, the frame provided by the invention can also be characterized in that the th boss is radially provided with a th through hole which is communicated with the outer part and the inner cavity of the piston tube.

In addition, the rack provided by the invention can also have the following characteristics: the second boss is radially provided with an inflation through hole communicated with the outside and the assembly gap, and the third boss is radially provided with a threading through hole communicated with the outside and the assembly gap.

The invention provides free piston split Stirling cryocoolers, which are characterized by comprising a compressor and an expander, wherein the compressor is provided with a frame, the expander is communicated with the compressor through a connecting pipe, and the frame is any frames.

In the free piston split type stirling cryocooler provided by the present invention, the free piston split type stirling cryocooler may further have the following characteristics: the compressor further comprises two compression units, each compression unit is provided with a compression piston, each compression piston is provided with a cylindrical inner cavity, an inwards concave annular groove and a plurality of cavities are formed in the outer wall of each compression piston, a throttling through hole communicated with the cylindrical inner cavities is formed in each cavity, and vent holes communicated with the annular grooves are formed in the end faces of the opening ends of the compression pistons.

In addition, the free piston split type stirling cryocooler provided by the present invention may further have the following features: wherein, two compression pistons are respectively and symmetrically arranged in the cylindrical inner cavity of the piston tube, and the open ends of the two compression pistons are oppositely arranged.

In addition, the free piston split type Stirling refrigerator provided by the invention can also be characterized in that the expander comprises an ejector, an ejector rod, a cold head, a cold end heat exchanger and an expansion cylinder, wherein the end of the ejector is connected with the expansion side plate spring through the ejector rod, and the other end of the ejector is a free end.

In addition, the free piston split type stirling cryocooler provided by the present invention may further have the following features: the cold end heat exchanger is a slit type heat exchanger and is arranged inside the cold head and tightly attached to the inner wall of the cold head, and the cold end heat exchanger is in interference fit with the cold head.

In addition, the free piston split type stirling cryocooler provided by the present invention may further have the following features: wherein, the ejector, the expansion cylinder and the cold head form an expansion cavity.

Action and Effect of the invention

According to the support and free piston split type Stirling refrigerator, the rectangular groove is formed in the piston pipe on the support, the through hole is formed in the groove and used for guiding the gas in the back pressure cavity to reach the compression cavity through the compression piston, and the piston stroke reduction caused by the increase of the pressure in the back pressure cavity due to the gas bearing is prevented.

In addition, the free piston split type Stirling refrigerator of the present invention eliminates the plate spring structure of the conventional free piston split type Stirling and provides the required radial support force in the form of a gas bearing.

, the expander is provided with flow guiding devices at the upper and lower ends of the eliminator, so that the air flow is more gentle and uniform, and the cold end heat exchanger is tightly attached to the cold head through interference fit for the slit heat exchanger, thereby being beneficial to improving the heat exchange efficiency and reducing the cold loss.

, depth grooves are arranged on the expander base to prevent the movement impact of the plate spring, so that the expander structure is more compact, and the circulation efficiency of the free piston split Stirling refrigerator is improved.

, the motor bracket which is consistent with the gas bearing structure and convenient for whole assembly and compactness enables the whole machine to run more stably, solves the problem of pressure rise of a back pressure cavity caused by the gas bearing, improves the efficiency of the whole machine, overcomes the problems of difficult assembly and positioning, heavy bracket weight and incompact whole machine of the traditional bracket, improves the assembly speed and precision, and compactedness of the whole machine, and reduces the weight of the whole machine.

Drawings

FIG. 1 is a schematic cross-sectional view of a free piston split Stirling cooler in an embodiment of the present invention;

FIG. 2 is a perspective view of a motor mount according to an embodiment of the present invention;

FIG. 3 is a view taken in the direction A of FIG. 2;

FIG. 4 is a cross-sectional view C-C of FIG. 3;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 3;

FIG. 6 is a cross-sectional view E-E of FIG. 3;

FIG. 7 is a view from the direction B in FIG. 2;

FIG. 8 is a perspective view of the compression piston in the embodiment;

FIG. 9 is a cross-sectional view F-F of FIG. 8;

FIG. 10 is a perspective view of an inner liner of a gas bearing in an example.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the bracket and the free piston split type stirling cryocooler of the invention are specifically described in the following embodiments with reference to the attached drawings.