CN215373023U - Pulse tube refrigerator system with single piston phase modulation - Google Patents
Pulse tube refrigerator system with single piston phase modulation Download PDFInfo
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- CN215373023U CN215373023U CN202120742038.1U CN202120742038U CN215373023U CN 215373023 U CN215373023 U CN 215373023U CN 202120742038 U CN202120742038 U CN 202120742038U CN 215373023 U CN215373023 U CN 215373023U
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- phase modulation
- tube refrigerator
- cold finger
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Abstract
The patent discloses a single piston phase modulated pulse tube refrigerator system. The cold finger of the pulse tube refrigerator is connected with the piston type phase modulation mechanism, the piston body of the piston type phase modulation mechanism and the pulse tube cold finger are coaxially arranged, the refrigerating capacity of the cold finger is adjusted by adjusting the phases of pressure waves and mass flows at the cold end of the pulse tube, and the piston type phase modulation mechanism can increase the driving mechanism to control the phase modulation piston body to move. The active vibration reduction mechanism and the pulse tube cold finger are coaxially arranged, and the data acquisition and control system can enable the movement direction of the balance piston body to be opposite to the movement direction of the piston body of the phase modulation mechanism by controlling the driving mechanism of the active vibration reduction mechanism. The pulse tube refrigerator realizes the accurate phase control of the trans-temperature area of the pulse tube refrigerator, improves the refrigeration efficiency and reduces the vibration output of the cold finger of the pulse tube refrigerator.
Description
Technical Field
This patent belongs to backheating formula cryocooler field, specifically relates to a pulse tube refrigerator system that adopts single piston type phase modulating mechanism and initiative damping mechanism of coaxial arrangement.
Background
The requirements of infrared technology, low-temperature electronic devices, superconducting technology and the like on low-temperature refrigerators are increasing day by day, and small low-temperature refrigerators have the characteristics of high efficiency and compactness and are receiving much attention.
The pulse tube refrigerator is an important branch in the field of regenerative small-sized low-temperature refrigerators, and the pulse tube refrigerator needs to adjust the phase relation between mass flow and pressure wave through a phase modulation mechanism, wherein the phase modulation mechanism is of a small hole-air reservoir type, a bidirectional air inlet type, an inertia tube type, a piston type and the like. The piston type phase modulation mechanism has the advantages of wide phase modulation range and accurate phase modulation angle, but the adoption of the piston type phase modulation is difficult to be applied in engineering due to the complex coupling mechanism of a plurality of compressors and a pulse tube cold finger and large volume and weight of the whole machine.
The cooling of sensitive devices such as superconducting quantum interferometers and the like puts a severe requirement on the vibration of a cryogenic refrigerator, and the micro vibration output of a vessel cold finger also interferes with the normal work of the sensitive devices.
Disclosure of Invention
In view of the above problems and needs, it is an object of this patent to provide a single piston phase modulated pulse tube refrigerator system.
In order to achieve the purpose, the technical scheme adopted by the patent is as follows:
the utility model provides a pulse tube refrigerator system of single piston phase modulation, includes actuating mechanism, pulse tube refrigerator cold finger, piston type phase modulation mechanism, initiative damping mechanism and data acquisition and control system, its characterized in that includes: the pulse tube refrigerator cold finger comprises a heat regenerator and a pulse tube; the piston type phase modulation mechanism comprises a piston body, a piston cylinder body, a supporting mechanism and a working cavity, wherein the piston body is positioned in the piston cylinder body and is connected with the supporting mechanism, and a gap is sealed between the piston body in the piston type phase modulation mechanism and the piston cylinder body to form the working cavity.
The active vibration reduction mechanism comprises a balance piston body and a driving mechanism, and the balance piston body of the active vibration reduction mechanism is connected with the driving mechanism; the data acquisition and control system comprises a displacement sensor;
the pulse tube refrigerator system with the coaxial component is characterized in that the driving mechanism is connected with a cold finger of the pulse tube refrigerator, the cold finger of the pulse tube refrigerator is communicated with a working cavity of the piston type phase modulation mechanism, a piston body of the piston type phase modulation mechanism is coaxially arranged with the cold finger of the pulse tube refrigerator, and the refrigerating capacity of the pulse tube refrigerator is adjusted by adjusting the phase of pressure waves and mass flow in the cold finger of the pulse tube refrigerator; the active vibration reduction mechanism and the pulse tube cold finger are coaxially arranged, and the data acquisition and control system acquires the amplitude and the phase of the piston body of the phase modulation mechanism.
The driving mechanism is connected with the cold finger of the pulse tube refrigerator through a connecting pipe or is directly coupled with the cold finger of the pulse tube without the connecting pipe. The supporting mechanism of the piston type phasing mechanism comprises a plate spring or a spiral spring support.
The piston body of the piston type phase modulation mechanism can be driven by a linear motor or other mechanisms to realize active phase modulation.
The data acquisition and control system comprises a displacement sensor and a control system, wherein the displacement sensor is used for acquiring the amplitude and the displacement phase of the piston body of the phase modulation mechanism.
A vibration reduction method of a coaxial arrangement-based single-piston phase modulation pulse tube refrigerator system comprises the following steps: the data acquisition and control system enables the motion direction of the balance piston body to be opposite to the motion direction of the phase modulation piston body by acquiring the displacement wave of the phase modulation piston body and controlling the driving mechanism in the active vibration reduction mechanism so as to reduce the cold finger vibration output.
Compared with the prior art, the advantage of this patent lies in:
(1) the single-piston phase modulation mechanism has wide phase modulation range and accurate phase modulation angle, and is beneficial to improving the efficiency of the pulse tube refrigerator;
(2) the single-piston phase modulation mechanism is coupled with the cold finger of the pulse tube refrigerator, so that the whole machine is simple and compact, and is convenient to couple with the load of a cooled device;
(3) the data acquisition and control system can drive the balance piston body through the vibration reduction driving mechanism, control the balance piston body to be opposite to the motion direction of the piston body of the phase modulation mechanism, and inhibit the pulse tube cold finger vibration.
Drawings
FIG. 1 is a schematic structural diagram of example 1 of this patent
FIG. 2 is a schematic structural diagram of example 2 of this patent
The numbers in the figures are as follows: the pulse tube refrigerator comprises a main driving mechanism 1, a pulse tube refrigerator cold finger 2-1, a pulse tube 2-2, a heat regenerator 3, a single-piston phase modulation mechanism 3, a phase modulation piston body 3-1, a cylinder body 3-2, a piston supporting mechanism 3-3, a working cavity 3-4, a phase modulation piston body driving mechanism 3-5, an active vibration damping mechanism 4, an active vibration damping piston body 4-1, an active vibration damping piston driving mechanism 4-2, a data acquisition and control system 5-1 and a displacement sensor 5-1.
Detailed Description
The patent is described in detail below with reference to the figures and the specific embodiments.
Example 1
As shown in fig. 1, the present embodiment provides a coaxially arranged pneumatic single-piston phase modulation pulse tube refrigerator and an active damping mechanism thereof, which includes a main driving mechanism 1, a pulse tube refrigerator cold finger 2, a pneumatic single-piston phase modulation mechanism 3, an active damping mechanism 4 and a data acquisition and control system 5. The pulse tube cold finger comprises a pulse tube 2-1 and a heat regenerator 2-2, the pneumatic single-piston phase modulation mechanism 3 comprises a piston body 3-1, a cylinder body 3-2, a piston supporting mechanism 3-3 and a working cavity 3-4, the active vibration reduction mechanism 4 comprises a balance piston body 4-1 and a driving mechanism 4-2, and the data acquisition and control system 5 comprises a displacement sensor 5-1.
The main driving mechanism 1 may be linear motor, thermoacoustic motor or other mechanism to drive the piston to reciprocate, and is connected to the hot end of the cold finger of the pulse tube and driven by the main driving mechanism to change the volume of the working cavity 3-4 constantly. The piston supporting mechanism 3-3 can be a plate spring piston or a spiral supporting spring, and the supporting mechanism 3-3 supports the piston body 3-1 to do continuous reciprocating motion.
The displacement wave of the piston body 3-1 can be collected in real time through the displacement sensor 5-1 of the data collection and control system 5, and then the data collection and control system 5 can output an electric signal to the active vibration reduction driving mechanism 4-2, so that the motion phase of the balance piston body 4-1 is opposite to that of the piston body 3-1, and the cold finger vibration output of the pulse tube refrigerator can be reduced.
Example 2
As shown in fig. 2, the present embodiment provides a coaxially arranged active phase modulation type pulse tube refrigerator and an active vibration damping mechanism thereof, including a first driving mechanism 1, a pulse tube refrigerator cold finger 2, an active phase modulation mechanism 3, an active vibration damping mechanism 4 and a data acquisition and control system 5. The pulse tube cold finger comprises a pulse tube 2-1 and a heat regenerator 2-2, the single-piston phase modulation mechanism 3 comprises a piston body 3-1, a cylinder body 3-2, a working cavity 3-4 and an active phase modulation piston driving mechanism 3-5, the active vibration reduction mechanism 4 comprises a balance piston body 4-1 and a balance piston body driving mechanism 4-2, and the data acquisition and control system 5 comprises a displacement sensor 5-1.
The main driving mechanism 1 and the active phase modulation piston driving mechanism 3-5 can be mechanisms for driving pistons to reciprocate, such as a linear motor or a thermoacoustic machine, and the main driving mechanism is connected with the cold finger heat end of the pulse tube. The active phase modulation piston driving mechanism 3-5 can control the motion of the piston body 3-1, and the phase relation between mass flow and pressure wave in the pulse tube is actively adjusted.
When the main driving mechanism 1 and the active phase modulation piston driving mechanisms 3-5 are linear motors, currents with different phase angles can be applied to the linear motors respectively, the phase difference of the compressor and the phase modulation mechanisms can be changed, and the refrigerating capacity of the pulse tube refrigerator can be adjusted.
The displacement wave of the piston body 3-1 can be collected in real time through the displacement sensor 5-1 of the data collection and control system 5, and then the data collection and control system 5 can output an electric signal to the active vibration reduction driving mechanism 4-2, so that the motion phase of the balance piston body 4-1 is opposite to that of the piston body 3-1, and the cold finger vibration output of the pulse tube refrigerator is reduced.
Finally, it should be noted that: it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the embodiments and descriptions are only illustrative of the principles of the patent, and that various changes and modifications may be made without departing from the spirit and scope of the patent, which shall fall within the scope of the claims. The scope of the patent claims is defined by the appended claims and their equivalents.
Claims (6)
1. A pulse tube refrigerator system with single piston phase modulation comprises a main driving mechanism (1), a pulse tube refrigerator cold finger (2), a piston type phase modulation mechanism (3), an active vibration reduction mechanism (4) and a data acquisition and control system (5),
the pulse tube refrigerator cold finger (2) comprises a heat regenerator (2-1) and a pulse tube (2-2);
the piston type phase modulation mechanism (3) comprises a piston body (3-1), a piston cylinder body (3-2), a supporting mechanism (3-3) and a working cavity (3-4), wherein the piston body (3-1) in the piston type phase modulation mechanism (3) is positioned in the piston cylinder body (3-2) and is connected with the supporting mechanism (3-3), and the piston body (3-1) and the piston cylinder body (3-2) form the working cavity (3-4);
the active vibration reduction mechanism (4) comprises a balance piston body (4-1) and an active vibration reduction piston driving mechanism (4-2), and the balance piston body (4-1) is connected with the active vibration reduction piston driving mechanism (4-2);
the data acquisition and control system (5) comprises a displacement sensor (5-1);
the main driving mechanism (1) is connected with a pulse tube refrigerator cold finger (2), the pulse tube refrigerator cold finger (2) is communicated with a working cavity (3-4) of the piston type phase modulation mechanism, a piston body (3-1) of the piston type phase modulation mechanism (3) is coaxially arranged with the pulse tube refrigerator cold finger (2), and the refrigerating capacity of the pulse tube refrigerator is adjusted by adjusting the phase of pressure wave and mass flow in the pulse tube refrigerator cold finger (2); the active vibration reduction mechanism (4) and the pulse tube cold finger (2) are coaxially arranged, and the data acquisition and control system (5) acquires the amplitude and the phase of the piston body (3-1) of the phase modulation mechanism.
2. A single piston phase modulated pulse tube refrigerator system as claimed in claim 1 wherein: the driving mechanism (1) is connected with the pulse tube refrigerator cold finger (2) through a connecting pipe or is directly coupled with the pulse tube cold finger (2) without the connecting pipe.
3. A single piston phase modulated pulse tube refrigerator system as claimed in claim 1 wherein: the supporting mechanism (3-3) of the piston type phase modulation mechanism (3) comprises a plate spring or a spiral spring support.
4. A single piston phase modulated pulse tube refrigerator system as claimed in claim 1 wherein: the piston body (3-1) of the piston type phase modulation mechanism (3) adopts a linear motor to realize active phase modulation.
5. A single piston phase modulated pulse tube refrigerator system as claimed in claim 1 wherein: and a clearance seal is formed between a piston body (3-1) in the piston type phase modulation mechanism (3) and a piston cylinder body (3-2).
6. A single piston phase modulated pulse tube refrigerator system as claimed in claim 1 wherein: the data acquisition and control system (5) comprises a displacement sensor (5-1) and a control system, wherein the displacement sensor (5-1) is used for acquiring the amplitude and the displacement phase of the piston body (3-1) of the phase modulation mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120742038.1U CN215373023U (en) | 2021-04-13 | 2021-04-13 | Pulse tube refrigerator system with single piston phase modulation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120742038.1U CN215373023U (en) | 2021-04-13 | 2021-04-13 | Pulse tube refrigerator system with single piston phase modulation |
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| CN215373023U true CN215373023U (en) | 2021-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074468A (en) * | 2021-04-13 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator system with single piston phase modulation and vibration reduction method thereof |
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2021
- 2021-04-13 CN CN202120742038.1U patent/CN215373023U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074468A (en) * | 2021-04-13 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator system with single piston phase modulation and vibration reduction method thereof |
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