CN1523309A - Phase modulator of air-operated separately mounted Stirling's refrigerator - Google Patents
Phase modulator of air-operated separately mounted Stirling's refrigerator Download PDFInfo
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- CN1523309A CN1523309A CNA031508227A CN03150822A CN1523309A CN 1523309 A CN1523309 A CN 1523309A CN A031508227 A CNA031508227 A CN A031508227A CN 03150822 A CN03150822 A CN 03150822A CN 1523309 A CN1523309 A CN 1523309A
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Abstract
The present invention discloses a phase modulator of pneumatic separated-type Stirling refrigerating machine. The described phase modulator is formed from regulating component and two cylindrical helical springs. Said regulating component is a metal disk, and radial outsides of its upper and lower two circular surfaces are equipped with circumferential recessed groove respectively, in which the centre of one circular surface has a mounting block screw-connected with an expansion piston. Two cylindrical helical springs are respectively inlaid in the circumferential recessed groove of metal disk, and the mounting block and expansion piston are connected into one body, the whole phase modulator is placed in the pneumatic cavity of expansion unit, and between the outer diameter and pneumatic cavity wall a slit is remained. Said invention utilizes said slit to provide a proper damp for expansion piston to make the movement of compressing piston and expanding piston be retained in a proper phase difference so as to make refrigerating machine produce refrigerating effect.
Description
Technical field
The present invention relates to pneumatic separated type sterlin refrigerator, specifically be meant the phase converter in the refrigeration machine.
Background technology
Pneumatic separated type sterlin refrigerator since coming out, just has been subjected to the favor of departments such as space flight, military affairs because it is simple in structure, system's control is convenient.Pneumatic separated type sterlin refrigerator is formed by connecting by the air guide connecting leg by the compression unit and the expansion cell centre of absolute construction.The pulsed gas that compression unit is come in causes the also pulsatile change of pressure differential between expansion chamber and the pneumatic cavity, make expansion piston reciprocating under this pulsating force, if the phase difference between this reciprocating motion and the expansion chamber pressure pulsation remains in the proper scope (its scope is about 80 °-120 °), refrigeration effect just can produce.Therefore, can reach refrigeration preferably, be necessary for expansion piston a suitable damping is provided, make the motion of compression piston and expansion piston maintain a suitable phase difference in order to make refrigeration machine.
At present, more common damping mode has following three kinds:
1. frictional damping: place packing ring between expansion piston and expansion cylinder wall, the pulsatile change of gas will be when overcoming frictional resistance, and expansion piston could move, and the motion of expansion piston just has been delayed like this.The inadequate natural endowment of this mode is exactly that coefficient of frictional resistance is difficult to remain steady state value, and As time goes on, and packing ring can be by the polishing of a little, thereby causes coefficient of frictional resistance more and more littler, and refrigeration machine will lose efficacy.
2. regenerator (regenerator) pressure drop: in regenerator, load filler very closely, the order number perhaps pack into than higher silk screen, make the resistance coefficient in the regenerator bigger, thereby gas can produce very big resistance when moving in regenerator, postponed the motion of expansion piston.The deficiency of this mode is to have ignored in order to pursue phase difference the thermodynamic property of regenerator, and excessive regenerator resistance causes the fluctuation pressure decay excessive, thereby refrigerating capacity is also weakened.
3. electromagnetic damping: moving-coil linear electric motors are installed in pneumatic cavity, coil and expansion piston are made of one, to drive coil movement during the expansion piston motion, the coil of motion produces electric current under the effect of magnetic field, and this electric current has produced the power opposite with coil movement under the effect in magnetic field, thereby reaches the purpose of delayed expansion piston motion.The main deficiency of this mode is that the decompressor volume is too huge, and quality is too heavy, and the venting of coil simultaneously can produce refrigeration machine pollution, influences service life.
Summary of the invention
Weak point such as short based on the refrigeration machine life-span that above-mentioned prior art exists, that efficient is low, volume is big and quality is heavy.The purpose of this invention is to provide the phase converter that a kind of pneumatic separated type sterlin refrigerator is used, utilize the slit between phase converter and the pneumatic cavity wall to come to provide a suitable damping for expansion piston, make the motion of compression piston and expansion piston maintain a suitable phase difference, thereby make refrigeration machine produce refrigeration effect.
The object of the present invention is achieved like this, a kind of phase converter that is used for pneumatic separated type sterlin refrigerator, and described pneumatic separated type sterlin refrigerator is formed by connecting by the air guide connecting leg by the compression unit and the expansion cell centre of absolute construction.Described phase converter is made of regulating part and two cylindrical helical springs, and regulating part is a rosette, and the radial outside of its upper and lower two discs has the groove of circumferential, and there is a mounting blocks that is spirally connected with expansion piston in the center of circle of one of them disc.Two cylindrical helical springs are embedded in respectively in the circumferential groove of rosette, and mounting blocks and expansion piston link into an integrated entity, and whole phase converter is put in the pneumatic cavity of expansion cell, leave slit between the external diameter of regulating part and the pneumatic cavity wall.
Phase converter of the present invention is to utilize regulating part that pneumatic cavity is divided into two sub-cavitys, and the gas in two cavitys is circulated by the slit between regulating part and the pneumatic cavity wall.Because this slit separation is very little, is generally 250-350 μ m, consequently the gas in two cavitys can produce certain viscosity resistance when this circulates, and also is the motion of expansion piston thereby stop regulating part, reaches the effect of phase modulation.Because the driving of sterlin refrigerator is adopted sinusoidal wavely, wish that therefore expansion piston also does sinusoidal motion in addition.In conjunction with the phase modulation effect of spring, consider expansion piston is supported with cylindrical helical spring, make it to become a harmonic oscillator, thereby reduce the serious dependence of phase difference damping.By regulating the width and the length of slit, can regulate the size of viscous drag, thereby keep a reasonable phase relation between the pressure oscillation of the motion of assurance passing piston and gas, the final refrigeration effect of expecting that produces.
Great advantage of the present invention is: refrigeration machine simple in structure, the life-span is long, volume is little, is suitable for the application of departments such as space flight, military affairs.
Description of drawings
Fig. 1 is the cross-sectional view of the decompressor of pneumatic separated type sterlin refrigerator;
Fig. 2 is the cross-sectional view of regulating part.
The specific embodiment
See structure shown in Figure 1, expansion cell is made up of pneumatic cylinder 1, regulating part 2, two cylindrical helical springs 3, regenerator 4, expansion piston 5, seal 6, air guide connecting leg 7 and expansion cylinders 8.Two cylindrical helical springs 3 are embedded in respectively in the groove 201 of the circumferential of two discs up and down of regulating part 2, and put in the pneumatic cavity 9 of pneumatic cylinder 1, leave slit 10 between regulating part and the pneumatic cavity wall, and pneumatic cavity is divided into two sub-cavitys 901 and 902.One of mounting blocks 202 in the regulating part 2 and expansion piston 5 is spirally connected and is fixed into one, put in expansion cylinder 8 other end of expansion piston 5, and connect with regenerator 4, whole expansion cell is connected with compression unit (not drawing among the figure) by air guide connecting leg 7, becomes a complete pneumatic separated type sterlin refrigerator.
The function implementation of this structure is as follows: the Working medium gas of discharging from compression piston (not drawing the figure) is transported to room temperature chamber 11 and regenerator 4 by air guide connecting leg 7, after the pressure oscillation of gas has overcome the resistance of expansion piston system, regenerator 4, expansion piston 5 moves vertically with regulating part 2, but this moment is because the motion of regulating part 2, gas in the pneumatic cavity flows between two sub-cavitys 901 and 902 by slit 10, thereby make and produce pressure oscillation in sub-cavity 901 and 902 rapidly, gas flows to low-pressure end along slit from high-pressure side, produce a reciprocal damping force, to keep suitable phase difference of expansion piston and amplitude.Obviously, this damping value is relevant with the pressure oscillation amplitude of sub-cavity 901 and 902, and the amplitude of pressure oscillation is relevant with the width and the length of slit, therefore, can make the motion of expansion piston meet refrigeration necessary phase difference of effect and amplitude requirement by regulating the size that slit width and length are regulated damping.The inventor is that the height of 21mm, pneumatic cavity is that 23mm, slit width are that 250～350 μ m, slit height have obtained more satisfactory phase modulation effect during for 6mm at the pneumatic cylinder internal diameter.
Claims (1)
1. the phase converter of a pneumatic separated type sterlin refrigerator, described pneumatic separated type sterlin refrigerator is by being formed by connecting by the air guide connecting leg in the middle of the compression unit of absolute construction and the expansion cell; It is characterized in that:
Described phase converter is made of regulating part (2) and two cylindrical helical springs (3), regulating part is a rosette, the radial outside of its upper and lower two discs has the groove (201) of circumferential, and there is a mounting blocks that is spirally connected with expansion piston (202) in the center of circle of one of them disc; Two cylindrical helical springs (3) are embedded in respectively in upper and lower two circumferential grooves (201) of rosette, mounting blocks and expansion piston (5) are screwed into one, whole phase converter is put in the pneumatic cavity of expansion cell (9), leaves slit (10) between the external diameter of regulating part and the pneumatic cavity wall internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150822 CN1210532C (en) | 2003-09-05 | 2003-09-05 | Phase modulator of air-operated separately mounted Stirling's refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150822 CN1210532C (en) | 2003-09-05 | 2003-09-05 | Phase modulator of air-operated separately mounted Stirling's refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1523309A true CN1523309A (en) | 2004-08-25 |
| CN1210532C CN1210532C (en) | 2005-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03150822 Expired - Fee Related CN1210532C (en) | 2003-09-05 | 2003-09-05 | Phase modulator of air-operated separately mounted Stirling's refrigerator |
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| Country | Link |
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| CN (1) | CN1210532C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519178A (en) * | 2011-12-06 | 2012-06-27 | 中国航天科技集团公司第五研究院第五一〇研究所 | Free piston expander |
| CN102678383A (en) * | 2012-06-05 | 2012-09-19 | 合肥工业大学 | Split type free piston stirling engine |
| CN103175357A (en) * | 2013-03-29 | 2013-06-26 | 中国电子科技集团公司第十六研究所 | On-line regulation device of expansion machine of split type stirling cryocooler |
| CN103629841A (en) * | 2013-12-17 | 2014-03-12 | 常州鸿源动力科技有限公司 | Novel Stirling cycle thermal expansion mechanism |
| CN106225289A (en) * | 2016-07-27 | 2016-12-14 | 武汉高芯科技有限公司 | Proportional direction valve Stirling decompressor and refrigeration machine thereof |
| CN109077697A (en) * | 2018-09-20 | 2018-12-25 | 郑州儿童医院 | A kind of adjustable anesthetic spreader of openings of sizes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032703B (en) * | 2010-11-26 | 2012-06-27 | 中国科学院上海技术物理研究所 | Integrated hot end phase adjusting structure of inertance-tube type pulse tube cooler and manufacturing method of phase adjusting structure |
-
2003
- 2003-09-05 CN CN 03150822 patent/CN1210532C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519178A (en) * | 2011-12-06 | 2012-06-27 | 中国航天科技集团公司第五研究院第五一〇研究所 | Free piston expander |
| CN102519178B (en) * | 2011-12-06 | 2013-10-02 | 中国航天科技集团公司第五研究院第五一〇研究所 | Free piston expander |
| CN102678383A (en) * | 2012-06-05 | 2012-09-19 | 合肥工业大学 | Split type free piston stirling engine |
| CN103175357A (en) * | 2013-03-29 | 2013-06-26 | 中国电子科技集团公司第十六研究所 | On-line regulation device of expansion machine of split type stirling cryocooler |
| CN103175357B (en) * | 2013-03-29 | 2015-07-22 | 中国电子科技集团公司第十六研究所 | On-line regulation device of expansion machine of split type stirling cryocooler |
| CN103629841A (en) * | 2013-12-17 | 2014-03-12 | 常州鸿源动力科技有限公司 | Novel Stirling cycle thermal expansion mechanism |
| CN103629841B (en) * | 2013-12-17 | 2016-05-18 | 常州鸿源动力科技有限公司 | A kind of novel stirling cycle heat power expansion mechanism |
| CN106225289A (en) * | 2016-07-27 | 2016-12-14 | 武汉高芯科技有限公司 | Proportional direction valve Stirling decompressor and refrigeration machine thereof |
| CN106225289B (en) * | 2016-07-27 | 2018-09-21 | 武汉高芯科技有限公司 | Proportional direction valve Stirling expanding machine and its refrigeration machine |
| CN109077697A (en) * | 2018-09-20 | 2018-12-25 | 郑州儿童医院 | A kind of adjustable anesthetic spreader of openings of sizes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1210532C (en) | 2005-07-13 |
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