Cold head damping mechanism and dilution refrigerator
By employing a cold head vibration reduction mechanism consisting of a substrate, damping module, and elastic module in the cryogenic refrigeration equipment, the problem of temperature fluctuations caused by vibration was solved, and stable operation of the refrigeration equipment was achieved.
Patent Information
- Application Number
- CN202520262236.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing technologies are insufficient to effectively reduce temperature fluctuations caused by vibrations in cryogenic refrigeration equipment, which affects the equipment's ability to reach the target temperature.
A cold head vibration reduction mechanism consisting of two base plates, a damping module, and an elastic module is adopted. The elastic module converts vibration energy into elastic expansion and contraction, and the damping module absorbs the elastic expansion and contraction energy to eliminate vibration.
It can quickly and fully absorb vibration energy, avoid temperature fluctuations caused by vibration, and ensure stable operation of refrigeration equipment.
Smart Images
Figure CN223648423U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of ultra-low temperature refrigeration equipment, and particularly relates to a cold head vibration damping mechanism and a dilution refrigeration machine. Background Technology
[0002] The cryogenic dilution refrigerator is a high-end scientific instrument capable of providing a near-absolute zero temperature environment, and is one of the key core devices in modern quantum science and quantum technology research. The cold head of the refrigerator vibrates to a certain extent during operation, and this vibration generates heat, affecting the equipment's ability to reach the target temperature.
[0003] Currently, there are many methods and structures for vibration reduction in equipment, but for cryogenic refrigeration equipment, ordinary vibration reduction methods are difficult to achieve the desired effect.
[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content
[0005] To address the aforementioned shortcomings, this utility model primarily provides a cold head vibration damping mechanism to solve the technical problem of vibration damping in ultra-low temperature refrigeration equipment.
[0006] To solve the above problems, this utility model provides a cold head vibration damping mechanism, including two opposing base plates; multiple sets of damping modules and elastic modules are arranged between the two base plates;
[0007] The elastic module is configured to convert vibration energy into elastic stretching;
[0008] The damping module is configured to absorb the energy of elastic stretching, thereby eliminating vibration.
[0009] According to the cold head vibration damping mechanism of this utility model, the substrate is disc-shaped, and the damping module and the elastic module are uniformly arranged around the center of the substrate.
[0010] According to the cold head vibration damping mechanism of this utility model, a circular hole is opened at the center of the substrate, and a corrugated pipe is connected between the circular holes of the two substrates.
[0011] According to the cold head vibration reduction mechanism of this utility model, the damping module and the elastic module are arranged in pairs.
[0012] According to the cold head vibration reduction mechanism of this utility model, the damping module and the elastic module are 6-10 pairs.
[0013] According to the cold head vibration reduction mechanism of this utility model, the damping module includes a rubber column, and a fixing head is provided at each end of the rubber column; the fixing head is fixed on the base plate on the corresponding side.
[0014] According to the cold head vibration damping mechanism of this utility model, a threaded hole is provided at the center of the fixing head; the fixing head is fixed to the base plate by a locking screw.
[0015] According to the cold head vibration damping mechanism of this utility model, the elastic module includes a spring sandwiched between two substrates.
[0016] According to the cold head vibration damping mechanism of this utility model, an adjusting rod is threaded between the two substrates, and the adjusting rod is screwed with an adjusting nut.
[0017] A dilution refrigeration unit includes a cold head and a thermostat module; it has a cold head vibration damping mechanism; one base plate of the vibration damping mechanism is connected to the cold head, and the other base plate is connected to the thermostat module.
[0018] In summary, the cold head vibration damping mechanism of this invention, through the cooperation of the elastic module and the damping module, can quickly and fully absorb vibration energy, preventing temperature fluctuations caused by the vibration and affecting refrigeration. This invention also provides a dilution refrigeration unit with a cold head vibration damping mechanism; one base plate of the damping mechanism is connected to the cold head, and the other base plate is connected to the thermostat module. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0021] Figure 3 This is a cross-sectional structural diagram of the damping module of this utility model;
[0022] Figure 4 This is a cross-sectional structural diagram of the elastic module of this utility model;
[0023] In the diagram: 1-base plate, 11-adjusting rod, 12-adjusting nut, 13-locking screw; 2-damping module, 21-rubber column, 22-fixed head, 221-threaded hole; 3-elastic module, 31-spring, 32-support head, 33-locking nut; 4-bellows. Detailed Implementation
[0024] See Figure 1 This utility model provides a cold head vibration damping mechanism, including two opposing base plates 1; multiple damping modules 2 and elastic modules 3 are arranged between the two base plates 1;
[0025] The elastic module 3 is configured to convert vibration energy into elastic stretching;
[0026] The damping module 2 is configured to absorb the energy of elastic stretching, thereby eliminating vibration;
[0027] This invention, through the cooperation of the elastic module 3 and the damping module 2, can quickly and fully absorb vibration energy, thus preventing temperature fluctuations caused by the vibration and affecting refrigeration.
[0028] Combination Figure 2 As one embodiment, the damping module 2 and the elastic module 3 of this utility model are arranged in pairs; they can cooperate with each other to absorb vibration energy.
[0029] In one embodiment, the substrate 1 is disc-shaped, and the damping module 2 and the elastic module 3 are uniformly arranged around the center of the substrate 1;
[0030] Furthermore, the damping module 2 and the elastic module 3 of this utility model are in the form of 6-10 pairs, preferably 7, 8, or 9 pairs.
[0031] As one embodiment, a circular hole is provided at the center of the substrate 1, and a bellows 4 is connected between the circular holes of the two substrates 1; the bellows 4 can absorb vibration energy and also has the function of vacuum sealing.
[0032] See Figure 3 As one embodiment, the damping module 2 of this utility model includes a rubber column 21, and a fixing head 22 is respectively provided at both ends of the rubber column 21; the fixing head 22 is respectively fixed on the base plate 1 on the corresponding side; under the action of vibration force, the rubber column 21 produces tensile or compressive deformation, thereby consuming vibration energy.
[0033] Furthermore, a threaded hole 221 is provided at the center of the fixing head 22; the fixing head 22 is fixed to the base plate 1 by a locking screw 13.
[0034] Even better, the fixing head 22 is made of metal, and the fixing head 22 and the base plate 1 have high rigidity, which can transmit vibration to the rubber column 21.
[0035] See Figure 4 As one embodiment, the elastic module 3 of this utility model includes a spring 31 sandwiched between two substrates 1; it can convert vibration energy into reciprocating elastic expansion and contraction, reducing the vibration frequency. At the same time, it works in conjunction with the rubber column 21 to consume the elastic energy of expansion and contraction, so that the expansion and contraction amplitude is reduced rapidly, thereby achieving the purpose of vibration reduction.
[0036] Furthermore, each end of the spring 31 is fitted with a support head 32 fixed on the base plate 1 to prevent the spring 31 from shifting.
[0037] Preferably, the support head 32 is made of PTFE material; the friction between it and the spring 31 is small, allowing for a rapid response to vibration.
[0038] Even better, the support head 32 is fixedly connected to the locking nut 33; the locking nut 33 is fixed to the base plate 1 by the locking screw 13; the connection between the locking nut 33 and the base plate 1 is strong, which can fully transmit vibration to the spring 31;
[0039] In one embodiment, an adjusting rod 11 is threaded between the two substrates 1, and an adjusting nut 12 is screwed onto the adjusting rod 11. The distance between the two substrates 1 can be adjusted by adjusting the adjusting nut 12 to achieve optimal matching between the damping module 2 and the elastic module 3, thus achieving the best vibration reduction effect. Adjusting the distance causes the spring 31 to be in a slightly compressed state, so that both ends of the spring 31 abut against the support head 32 with a certain elastic force, preventing loosening at the contact point and thus avoiding vibration. Simultaneously, the rubber column 21 is in a slightly compressed state, allowing it to quickly dissipate energy during vibration.
[0040] This utility model also provides a dilution refrigeration machine, including a cold head and a thermostat module; it has the aforementioned cold head vibration damping mechanism; one base plate 1 of the vibration damping mechanism is connected to the cold head, and the other base plate 1 is connected to the thermostat module.
[0041] In summary, this utility model provides a cold head vibration damping mechanism that, through the cooperation of an elastic module and a damping module, can quickly and fully absorb vibration energy, preventing temperature fluctuations caused by the vibration and affecting refrigeration. This utility model also provides a dilution refrigeration unit with a cold head vibration damping mechanism; one base plate of the damping mechanism is connected to the cold head, and the other base plate is connected to a thermostat module.
[0042] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.
Claims
1. A cold head vibration damping mechanism, characterized in that, It includes two opposing base plates; multiple damping modules and elastic modules are arranged between the two base plates; The elastic module is configured to convert vibration energy into elastic stretching; The damping module is configured to absorb the energy of elastic stretching, thereby eliminating vibration.
2. The cold head vibration damping mechanism as described in claim 1, characterized in that, The substrate is disc-shaped, and the damping module and the elastic module are uniformly arranged around the center of the substrate.
3. The cold head vibration damping mechanism as described in claim 2, characterized in that, A circular hole is provided at the center of the substrate, and a corrugated pipe is connected between the circular holes of the two substrates.
4. The cold head vibration damping mechanism as described in claim 2, characterized in that, The damping module and the elastic module are arranged in pairs.
5. The cold head vibration damping mechanism as described in claim 4, characterized in that, The damping module and the elastic module consist of 6-10 pairs.
6. The cold head vibration damping mechanism as described in claim 1, characterized in that, The damping module includes a rubber column, and a fixing head is provided at each end of the rubber column; the fixing head is fixed on the base plate on the corresponding side.
7. The cold head vibration damping mechanism as described in claim 6, characterized in that, A threaded hole is provided at the center of the fixing head; the fixing head is fixed to the base plate by a locking screw.
8. The cold head vibration damping mechanism as described in claim 6, characterized in that, The elastic module includes a spring sandwiched between two substrates.
9. The cold head vibration damping mechanism as described in claim 1, characterized in that, An adjusting rod is threaded between the two substrates, and an adjusting nut is screwed onto the adjusting rod.
10. A dilution refrigeration unit, comprising a cold head and a thermostat module; characterized in that, It has a cold head vibration damping mechanism as described in any one of claims 1 to 9; one base plate of the vibration damping mechanism is connected to the cold head, and the other base plate is connected to the thermostat module.