CN106840728A - A kind of device and evaluation method for independent assessment vascular cold finger performance - Google Patents
A kind of device and evaluation method for independent assessment vascular cold finger performance Download PDFInfo
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- CN106840728A CN106840728A CN201710095961.9A CN201710095961A CN106840728A CN 106840728 A CN106840728 A CN 106840728A CN 201710095961 A CN201710095961 A CN 201710095961A CN 106840728 A CN106840728 A CN 106840728A
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- cold finger
- piston
- vascular cold
- displacement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Physics & Mathematics (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a kind of device and evaluation method for independent assessment vascular cold finger performance.Device includes vascular cold finger to be evaluated, Linearkompressor, dynamic pressure transducer, displacement transducer, driving power supply, phase modulation piston, vacuum dewar and refrigeration system for measuring quantity.Dynamic pressure transducer is used to measure vascular cold finger import and export pressure wave；Displacement transducer and driving power supply are used for measuring and control active compressor poor with piston phase with the scavenging volume of phase modulation piston；The pressure wave and volume flow rate size and phase relation of vascular cold finger entrance and exit are adjusted by changing scavenging volume with piston phase difference, the relation of vascular cold finger input sound work(and refrigerating capacity under optimum angle is obtained.Apparatus of the present invention advantage is that can exclude compressor efficiency and the interference of phase modulation structure to carry out vascular cold finger refrigeration performance quality independent assessment, and simple structure, easily operation, and evaluation objective clearly, is conducive to improving the design optimization efficiency of vascular cold finger.
Description
Technical field：
The present invention is under the jurisdiction of regenerating type low-temperature refrigerator field, and in particular to one kind is applied to independent assessment vascular cold finger
The device and method of energy.
Background technology：
Vascular refrigerator is a kind of new regenerating type low-temperature refrigerator, and compared with traditional sterlin refrigerator, it is eliminated
The mechanical moving element of cold end, preferable phase relation is obtained using the phase modulating mechanism in hot junction, with simple structure, vibration
Small, high reliability.Since the eighties in 20th century, vascular refrigerator has at home and abroad obtained extensive attention and research,
It is widely applied at aspects such as Aero-Space, superconduction industry, cryotronics, cryogenic medicines.With to pulse tube refrigeration mechanism
Further investigation and adjusted device progressively improvement, vascular refrigerator technology is ripe day by day, especially the effect of more than 80K warm areas
Rate can reach the level suitable with sterlin refrigerator.
Vascular refrigerator is made up of linear osccilation compressor, vascular cold finger, the part of phase modulating mechanism three, and vascular refrigerator is efficient
Need three part coupling matchings to act synergistically during operation, when overall performance is not up to design object, it is necessary to screen out compressor,
Vascular cold finger or phase modulating mechanism there is a problem that this will carry out independent assessment to vascular cold finger performance.Further, since vascular
Cold finger regenerator is laminated by hundreds of even thousands of high mesh number silk screens, it is easy to cause many Making programmes identical
Vascular cold finger flow resistance is inconsistent, brings the deviation of overall impedance, and then influence and miscellaneous part coupling matching effect.At present
Due to compressor in regenerating type low-temperature refrigerator and vascular cold finger and the close coupling characteristic of phase modulating mechanism, can only be according to refrigeration machine
Overall performance carry out indirectly problem diagnosis, do not have a kind of effective method can be completely by vascular cold finger from whole machine point
Leave to carry out independent assessment and Resolving probiems.
The content of the invention：
It is an object of the invention to provide a kind of simple structure, the device of the independent assessment vascular performance of simple operation and side
Method, the existing regenerating type low-temperature refrigerator of solution cannot carry out independence, effectively evaluating and ask to vascular cold finger design performance quality
Topic.
The device of independent assessment vascular cold finger performance of the present invention, including Linearkompressor 1, the first dynamic pressure transducer 2,
Vascular cold finger 3 to be evaluated, vacuum dewar 4, refrigeration system for measuring quantity 5, second pressure sensor 6, phase modulation piston 7, driving power supply
8, the first displacement transducer 9, second displacement sensor 10；Wherein：
The Linearkompressor 1 opens seal groove on venthole section, and the rubber seal of mounting adaptation is sealed, and
It is connected through a screw thread through the first dynamic pressure transducer 2；First dynamic pressure transducer 2 and the air inlet of vascular cold finger 3 to be evaluated
Flange is connected, and the metallic packing ring of mounting adaptation is sealed；The gas outlet of vascular cold finger 3 to be evaluated and the second dynamic pressure sensing
The flange of device 6 is connected, and the metallic packing ring of mounting adaptation is sealed；Seal groove is opened on the gas outlet section of phase modulation piston 7, installs suitable
The rubber seal matched somebody with somebody is sealed, and is connected through a screw thread with the second dynamic pressure transducer 6；Vascular cold finger 3 to be evaluated
Vacuum dewar 4 is installed in periphery, condition of high vacuum degree when keeping testing；3 cool end heat exchanger of vascular cold finger 3.3 to be evaluated is installed refrigeration and is measured
Measuring instrument measurement cryogenic temperature and the refrigerating capacity of amount system 5；First displacement transducer 9 is installed on the compression piston of Linearkompressor 1
And be connected with driving power supply 8, second displacement sensor 10 is installed on phase modulation piston 6 and is connected with driving power supply 8, drive electricity
Source 8 coordinates the first displacement transducer 9, second displacement sensor 10 is measurable and controls the compression piston of Linearkompressor 1 and phase modulation
The displacement stroke and phase difference of piston 7；First dynamic pressure transducer 2 and the second dynamic pressure transducer 6 are piezoelectric sensing
Device type, it is connected with sensor threeway valve seat using drill form, and seal washer uses beryllium-bronze material, and on a sensor
Coiling unsintered tape carries out auxiliary seal.
The Linearkompressor 1 is opposed type Linearkompressor, and compression piston diameter is not less than 25mm.Range is not small
In 6mm.
The phase modulation piston 7 for linear electric motor single compressor or opposed compressor, piston diameter 10mm~
20mm, piston stroke is not less than 5mm.
First displacement transducer 9, second displacement sensor 10 is non-contact displacement transducer, and certainty of measurement 10 is micro-
It is more than rice.
The evaluation method of the device of independent assessment vascular cold finger performance of the invention, comprises the following steps：
1) by driving power supply (8) linear adjustment compressor (1) piston displacement X1, phase modulation piston (7) piston displacement X2With
And the phase difference θ of two-piston is identical with Theoretical Design value holding；
2) measure Linearkompressor 1 and to treat the pressure wave between vascular cold finger 3 by the first dynamic pressure transducer 2
P1；
3) the output sound work(W of Linearkompressor 1 is calculated according to thermoacoustic theory indirectlyaFor：
Wherein A is piston cross-section, and f is running frequency,It is pressure wave P1With compression piston displacement X1Phase difference；
4) pressure wave between vascular cold finger 3 to be evaluated and phase modulation piston 7 is measured to obtain by the second dynamic pressure transducer 6
P2, calculate the dynamic pressure difference Δ P=P of cold finger gateway1-P2, cold finger when producing in batches is evaluated by Δ P values and fills silk screen
Uniformity；
5) the cryogenic temperature T of cold finger under this running status is measured by the system for measuring quantity 5 that freezescWith refrigerating capacity Qc；
6) the ratio Carnot efficiency for finally obtaining vascular cold finger 3 to be evaluated is：Wherein TaIt is environment temperature,
The efficiency is to evaluate the good and bad important evaluation index of the performance of vascular cold finger 3.
The above parameter all can be by the piston displacement of the linear adjustment compressor 1 of driving power supply 8 and phase modulation piston 7
It is poor with piston phase to obtain, therefore the equivalent inpnt sound work(of apparatus of the present invention adopted with phase modulation ability and vascular cold finger 3 to be evaluated
True compressor is identical with phase modulating mechanism, therefore the evaluation efficiency for obtaining is equivalent.
The advantage of the invention is that：The requirement of input sound work(, phase modulation requirement to vascular cold finger carry out equivalent with condition of work
Simulation, makes the vascular cold finger performance evaluation independent from whole machine, definitely question classification, improves that vascular is cold to refer to design
Optimization efficiency, while carrying out effective quality testing and scale selection to vascular cold finger, it is ensured that homogeneity of product.
Brief description of the drawings：
Fig. 1 is principle of device schematic diagram of the present invention for independent assessment vascular cold finger performance；
In figure：1st, Linearkompressor；2nd, the first dynamic pressure transducer；3rd, vascular cold finger to be evaluated；3.1st, arteries and veins to be evaluated
The main hot end heat exchanger of pipe cold finger；3.2nd, vascular cold finger regenerator to be evaluated；3.3rd, vascular cold finger cool end heat exchanger to be evaluated；3.4、
Vascular cold finger vascular to be evaluated；3.5th, vascular cold finger to be evaluated time hot end heat exchanger；4th, vacuum dewar；5th, refrigeration measurement system
System；6th, second pressure sensor；7th, phase modulation piston；8th, driving power supply；9th, the first displacement transducer；10th, second displacement sensor
Specific embodiment：
Below in conjunction with the accompanying drawings and embodiment further describes the present invention.
As shown in figure 1, the device of independent assessment vascular cold finger performance of the present invention, including the dynamic pressure of Linearkompressor 1, first
Force snesor 2, vascular cold finger 3 to be evaluated, vacuum dewar 4, refrigeration system for measuring quantity 5, second pressure sensor 6, phase modulation piston
7, driving power supply 8, the first displacement transducer 9, second displacement sensor 10.
Use piston diameter to open seal groove on the venthole section of Linearkompressor 1 of 26mm, the rubber of mounting adaptation is close
Seal is sealed, and is connected through a screw thread through the first dynamic pressure transducer 2；First dynamic pressure transducer 2 with it is to be evaluated
The air inlet flange of valency vascular cold finger 3 is connected, and the metallic packing ring of mounting adaptation is sealed；The gas outlet of vascular cold finger 3 to be evaluated
It is connected with the flange of the second dynamic pressure transducer 6, the metallic packing ring of mounting adaptation is sealed；Phase modulation piston 7 is a diameter of
The opposed pistons of 18mm, opens seal groove on the section of gas outlet, the rubber seal of mounting adaptation is sealed, and dynamic with second
State pressure sensor 6 is connected through a screw thread；Vacuum dewar 4 is installed in the periphery of vascular cold finger to be evaluated 3, vacuum when keeping testing
10-4More than Pa；3 cool end heat exchanger of vascular cold finger 3.3 to be evaluated installs the measuring instrument measurement cryogenic temperature of refrigeration system for measuring quantity 5
With refrigerating capacity；First displacement transducer 9 is installed on the compression piston of Linearkompressor 1, second displacement sensing is installed on phase modulation piston 6
Device 10 is simultaneously connected with driving power supply 8, and driving power supply 8 coordinates the first displacement transducer 9, second displacement sensor 10 measurable simultaneously
The displacement stroke and phase difference of the control compression piston of Linearkompressor 1 and phase modulation piston 7；First dynamic pressure transducer 9 and
Two dynamic pressure transducers 10 are piezoelectric transducer type, and it is connected with sensor threeway valve seat using drill form, sealing
Packing ring uses beryllium-bronze material, and coiling unsintered tape carries out auxiliary seal on a sensor.
During practical application, the first dynamic pressure transducer 2 and the second dynamic pressure transducer 6 are piezoelectric transducer class
Type, its model Kistler 5015A1000；First displacement transducer 9 and second displacement sensor 10 are LVDT displacement sensings
Device.
The evaluation method of the invention device is carried out according to the following steps：
1) by driving power supply (8) linear adjustment compressor (1) piston displacement X1, phase modulation piston (7) piston displacement X2With
And the phase difference θ of two-piston is identical with Theoretical Design value holding；
2) measure Linearkompressor 1 and to treat the pressure wave between vascular cold finger 3 by the first dynamic pressure transducer 2
P1；
3) the output sound work(W of Linearkompressor 1 is calculated according to thermoacoustic theory indirectlyaFor：
Wherein A is piston cross-section, and f is running frequency,It is pressure wave P1With compression piston displacement X1Phase difference；
4) pressure wave between vascular cold finger 3 to be evaluated and phase modulation piston 7 is measured to obtain by the second dynamic pressure transducer 6
P2, calculate the dynamic pressure difference Δ P=P of cold finger gateway1-P2, cold finger when producing in batches is evaluated by Δ P values and fills silk screen
Uniformity；
5) the cryogenic temperature T of cold finger under this running status is measured by the system for measuring quantity 5 that freezescWith refrigerating capacity Qc；
6) the ratio Carnot efficiency for finally obtaining vascular cold finger 3 to be evaluated is：Wherein TaIt is environment temperature,
The efficiency is to evaluate the good and bad important evaluation index of the performance of vascular cold finger 3.
Finally it should be noted that：It should be understood by those skilled in the art that, the present invention is not limited to the above embodiments, on
Merely illustrating the principles of the invention described in embodiment and specification is stated, the premise of spirit and scope of the invention is not being departed from
Under, various changes and modifications of the present invention are possible, and these changes and improvements all fall within the protetion scope of the claimed invention.This hair
Bright claimed scope is by appending claims and its equivalent thereof.
Claims (5)
1. a kind of device for independent assessment vascular cold finger performance, including Linearkompressor (1), the first dynamic pressure transducer
(2), vascular cold finger (3) to be evaluated, vacuum dewar (4), refrigeration system for measuring quantity (5), second pressure sensor (6), phase modulation are lived
Plug (7), driving power supply (8), the first displacement transducer (9), second displacement sensor (10)；It is characterized in that：
Seal groove is opened on Linearkompressor (1) the venthole section, the rubber seal of mounting adaptation is sealed, and is passed through
First dynamic pressure transducer (2) is connected through a screw thread；First dynamic pressure transducer (2) enters with vascular cold finger (3) to be evaluated
Gas port flange is connected, and the metallic packing ring of mounting adaptation is sealed；Vascular cold finger (3) gas outlet to be evaluated and the second dynamic pressure
Force snesor (6) flange is connected, and the metallic packing ring of mounting adaptation is sealed；Open close on phase modulation piston (7) gas outlet section
Sealing groove, the rubber seal of mounting adaptation is sealed, and is connected through a screw thread with the second dynamic pressure transducer (6)；Treat
Evaluate vascular cold finger (3) periphery and vacuum dewar (4) is installed, condition of high vacuum degree when keeping testing；Vascular cold finger (3) cold end to be evaluated is changed
Hot device (3.3) installs measuring instrument measurement cryogenic temperature and the refrigerating capacity of refrigeration system for measuring quantity (5)；Linearkompressor (1) compresses
First displacement transducer (9) is installed on piston and is connected with driving power supply (8), second displacement is installed on phase modulation piston (6) and is passed
Sensor (10) is simultaneously connected with driving power supply (8), and driving power supply (8) coordinates the first displacement transducer (9), second displacement sensor
(10) measure and control the displacement stroke and phase difference of Linearkompressor (1) compression piston and phase modulation piston (6)；First dynamic pressure
Force snesor (2) and the second dynamic pressure transducer (6) are piezoelectric transducer type, and it uses spiral shell with sensor threeway valve seat
Form connection is connect, seal washer uses beryllium-bronze material, and coiling unsintered tape carries out auxiliary seal on a sensor.
2. the device of a kind of independent assessment vascular cold finger performance according to claim 1, it is characterised in that：Described is linear
Compressor (1) is opposed type Linearkompressor, and compression piston diameter is not less than 25mm.Range is not less than 6mm.
3. the device of a kind of independent assessment vascular cold finger performance according to claim 1, it is characterised in that：Described phase modulation
Piston (7) is the single compressor or opposed compressor of linear electric motor, and piston diameter 10mm~20mm, piston stroke is not small
In 5mm.
4. the device of a kind of independent assessment vascular cold finger performance according to claim 1, it is characterised in that：Described first
Displacement transducer (9) and second displacement sensor (10) are non-contact displacement transducer, more than 10 microns of certainty of measurement.
5. a kind of cold finger performance evaluation side of the device for independent assessment vascular cold finger performance based on described in claim 1
Method, it is characterised in that comprise the following steps：
1) by driving power supply (8) linear adjustment compressor (1) piston displacement X1, phase modulation piston (7) piston displacement X2And two
The phase difference θ of piston is identical with Theoretical Design value holding；
2) by the first dynamic pressure transducer (2) measure Linearkompressor (1) with treat the pressure wave between vascular cold finger (3)
P1；
3) Linearkompressor (1) output sound work(W is calculated according to thermoacoustic theory indirectlyaFor：
Wherein A is piston cross-section, and f is running frequency,It is pressure wave P1With compression piston displacement X1Phase difference；
4) pressure between vascular cold finger (3) to be evaluated and phase modulation piston (7) is measured to obtain by the second dynamic pressure transducer (6)
Ripple P2, calculate the dynamic pressure difference Δ P=P of cold finger gateway1-P2, cold finger when producing in batches is evaluated by Δ P values and fills silk screen
Uniformity；
5) the cryogenic temperature T of cold finger under this running status is measured by the system for measuring quantity that freezes (5)cWith refrigerating capacity Qc；
6) the ratio Carnot efficiency for finally obtaining vascular cold finger (3) to be evaluated is：Wherein TaIt is environment temperature, should
Efficiency is to evaluate the good and bad important evaluation index of vascular cold finger (3) performance.
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| CN201710095961.9A CN106840728B (en) | 2017-02-22 | 2017-02-22 | Device and method for independently evaluating vascular cold finger performance |
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|---|---|---|---|
| CN201710095961.9A CN106840728B (en) | 2017-02-22 | 2017-02-22 | Device and method for independently evaluating vascular cold finger performance |
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| CN106840728B CN106840728B (en) | 2023-07-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917928A (en) * | 2017-11-01 | 2018-04-17 | 大连理工大学 | A kind of dual openings multitubular bundles refrigeration machine Unsteady Heat Transfer test platform |
| CN109374330A (en) * | 2018-11-21 | 2019-02-22 | 中国科学院上海技术物理研究所 | A kind of device and evaluation method for evaluating free-piston type refrigeration machine assembling quality |
| CN113154715A (en) * | 2021-04-13 | 2021-07-23 | 中国科学院上海技术物理研究所 | Coaxial active phase modulation power recovery pulse tube refrigerator |
| CN115289713A (en) * | 2021-09-14 | 2022-11-04 | 中国科学院上海技术物理研究所 | Active piston phase modulation power recovery integrated pulse tube refrigerator supported by column spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107917928A (en) * | 2017-11-01 | 2018-04-17 | 大连理工大学 | A kind of dual openings multitubular bundles refrigeration machine Unsteady Heat Transfer test platform |
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| CN109374330A (en) * | 2018-11-21 | 2019-02-22 | 中国科学院上海技术物理研究所 | A kind of device and evaluation method for evaluating free-piston type refrigeration machine assembling quality |
| CN113154715A (en) * | 2021-04-13 | 2021-07-23 | 中国科学院上海技术物理研究所 | Coaxial active phase modulation power recovery pulse tube refrigerator |
| CN115289713A (en) * | 2021-09-14 | 2022-11-04 | 中国科学院上海技术物理研究所 | Active piston phase modulation power recovery integrated pulse tube refrigerator supported by column spring |
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| CN106840728B (en) | 2023-07-04 |
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