Aerospace-level multi-vibration-source large-cooling-capacity ultralow-vibration refrigerating machine device
By combining multi-source active vibration isolation devices with passive vibration reduction, the problem of vibration impact on aerospace-grade large-capacity refrigerators in limited spaces is solved, active and passive vibration reduction, heat dissipation and cold capacity transfer are achieved, the integration difficulty is reduced, the vibration reduction bandwidth is broadened, and the amplitude problem during launch is solved.
Patent Information
- Application Number
- CN202511184292.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2045-08-22
AI Technical Summary
The vibration of aerospace-grade large-capacity refrigerators affects imaging quality. Existing technologies make it difficult to achieve active and passive vibration reduction, heat dissipation, uniform temperature and cold capacity transfer in a limited space, and vibration isolators are difficult to withstand large amplitudes during launch.
A multi-source active vibration isolation device is combined with passive vibration reduction. The locking device and the vibration isolator are integrated into one through a vibration isolation unlocking device. Combined with a flexible cold chain, a low-temperature heat pipe and a low-leakage thermal cold finger protection structure, the combined effect of active and passive vibration reduction is achieved, the vibration reduction bandwidth is broadened, and full-band vibration suppression is achieved through a multi-source active vibration reduction control circuit.
Active and passive vibration reduction, heat dissipation and cold transfer are achieved in a limited space, which solves the mechanical isolation between large-capacity refrigerators and high-precision payloads, reduces the difficulty of integration, broadens the vibration reduction bandwidth, and solves the amplitude problem during the launch process.
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Figure CN120667341A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of refrigerators, and in particular to an aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device. Background Art
[0002] Mechanical refrigeration technology is commonly used in optical remote sensing payloads to reduce background noise. However, aerospace-grade, high-capacity refrigerators often generate significant vibration, severely impacting image quality. Existing technologies typically place refrigerators close to the imaging focal plane to minimize heat transfer temperature differences. This increases the difficulty of vibration suppression and heat dissipation. Furthermore, the dispersed nature of refrigerators complicates layout and creates long heat dissipation and cryogenic link paths. Vibration suppression for refrigerators typically utilizes active or passive vibration absorption techniques, with the absorber located at the end of the refrigerator compressor or using localized vibration isolation within the compressor itself. This results in a low level of integration, and a single vibration reduction method struggles to cover the entire frequency band. Summary of the Invention
[0003] The purpose of the present invention is to provide an aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device to solve the problems existing in the above-mentioned prior art, which can realize active and passive vibration reduction, heat dissipation, temperature uniformity, and cooling capacity transfer in a limited space, and realize mechanical isolation of large vibration, large heat components and high-precision loads, thus solving the contradiction between the requirements of low-temperature optical remote sensing technology for large cooling capacity and low vibration. The vibration isolation unlocking device integrates the locking device and the vibration isolator into one, reducing the difficulty of integration. At the same time, the locking device is provided to solve the problem that the vibration isolator is difficult to resist the large amplitude of the launch process. The active vibration reduction and passive vibration reduction achieved by the multi-vibration source active vibration isolation device can work in combination to broaden the vibration reduction bandwidth and achieve full-band vibration suppression.
[0004] To achieve the above-mentioned objectives, the present invention provides the following solution: an aerospace-grade multi-vibration source, large cooling capacity, ultra-low vibration refrigeration and heat transfer device, comprising a refrigerator, a vibration isolation unlocking device, a vibration feedback sensor, a multi-vibration source active vibration reduction control circuit, an integrated heat collecting plate, a flexible cold chain, a low-temperature heat pipe, and a low-leakage heat finger protection structure; the refrigerator is installed on one side of the integrated heat collecting plate and is completely heat-conductingly installed with the integrated heat collecting plate. The hot ends of the multiple flexible cold chains are installed on the other side of the integrated heat collecting plate to transfer the heat generated by the refrigerator to the heat dissipation plate outside the cabin and dissipate it into space. The vibration feedback sensor is installed to the vibration source end of the refrigerator, and the flexible cold chain is installed to the cold finger end of the refrigerator. The upper end of the vibration isolation unlocking device is connected to the integrated heat collecting plate, and the cold end of the low-temperature heat pipe is connected to the flexible cold chain. The multi-vibration source active vibration reduction control circuit drives the opposing motor of the refrigerator to achieve active suppression of vibration by collecting data from the vibration feedback sensor. The low-leakage heat finger protection structure is installed on the outside of the cold finger of the refrigerator.
[0005] The present invention has the following beneficial effects:
[0006] The purpose of the present invention is to provide an aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device to solve the problems existing in the prior art, and to realize active and passive vibration reduction, heat dissipation, temperature uniformity, and cooling capacity transfer in a limited space, and to achieve mechanical isolation of large vibration, large heat components and high-precision loads, thereby solving the contradiction between the requirements of low-temperature optical remote sensing technology for large cooling capacity and low vibration. The vibration isolation unlocking device integrates the locking device and the vibration isolator into one, reducing the difficulty of integration. At the same time, the locking device is provided to solve the problem that the vibration isolator is difficult to resist the large amplitude of the launch process. Active vibration reduction and passive vibration reduction can back up each other, broaden the vibration reduction bandwidth, and achieve full-band vibration suppression. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0008] Figure 1 A schematic diagram of the structure of the aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device provided by the present invention;
[0009] Figure 2 This is a schematic diagram of the structure of the flexible cold chain used in the present invention;
[0010] Figure 3 Schematic diagram of the installation interface of the main refrigerator and vibration isolation unlocking component of the integrated solar collector;
[0011] Figure 4 This is a schematic diagram of the installation interface of the integrated collector plate flexible heat pipe and the internal temperature-averaging heat pipe;
[0012] Figure 5 This is a schematic diagram of a non-contact limit cold finger protective cover for a refrigerator cold finger;
[0013] Figure 6 Schematic diagram of a low-leakage heat-resistant cold finger protection structure for a refrigerator;
[0014] Figure 7 This is a structural diagram of the vibration isolation unlocking device;
[0015] Figure 8 A schematic diagram of the position of the locking mechanism of the vibration isolation unlocking device;
[0016] Figure 9 Schematic diagram of the low-temperature heat pipe structure;
[0017] Figure 10 This is a block diagram of the multi-vibration source active vibration reduction control circuit provided by the present invention.
[0018] Figure 11 This is a schematic diagram of the algorithm principle of the multi-vibration source active vibration reduction control circuit provided by the present invention.
[0019] In the picture:
[0020] 1-refrigeration machine, 2-vibration isolation unlocking device, 3-vibration feedback sensor, 4-heat collecting plate, 5-flexible cold chain, 6-low-temperature heat pipe, 7-low-leakage hot and cold finger protection structure, 8-drive input port. DETAILED DESCRIPTION
[0021] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. To achieve the above-mentioned objectives, the present invention adopts the following technical solutions.
[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] like Figure 1As shown, this embodiment provides an aerospace-grade, multi-vibration source, large-cooling-capacity, ultra-low-vibration refrigerator device, comprising a refrigerator 1, a vibration isolation unlocking device 2, a vibration feedback sensor 3, a multi-vibration source active vibration reduction control circuit, an integrated heat collector 4, a flexible cold chain 5, a low-temperature heat pipe 6, and a low-leakage cold finger protection structure 7. Multiple refrigerators 1 are mounted to one side of the integrated heat collector 4, completely thermally conductively attached to the integrated heat collector 4. One side 5-2 of the flexible cold chain is mounted to one side of the refrigerator's cold finger 1-2, and the other side 5-1 is mounted to one end 6-1 of the low-temperature heat pipe 6. The refrigerator 1 includes a compressor 1-1, cold fingers 1-2, and a gas reservoir 1-3. A refrigerator drive input port 8 is provided at the end of the compressor 1-1. The vibration feedback sensor 3 is mounted to the end of the refrigerator compressor 1-1 to monitor the vibration signal of the vibration source. The flexible cold chain 5 is mounted to the end of the refrigerator's cold finger 1-2 to transfer cooling capacity to the load and isolate vibration transmission. The cold end of the low-temperature heat pipe 6 is connected to the flexible cold chain 5, and the hot end of the low-temperature heat pipe 6 is connected to the device requiring cooling. The upper end of the vibration isolation unlocking device 2 is connected to the integrated heat collecting plate 4, and the lower end is connected to the external mounting base. During the active launch phase, the vibration isolation unlocking device 2 is locked. Before the refrigerator 1 operates, the unlocking command is sent only by the vibration isolation unlocking device 2, which is connected to the vibration isolator 2-1. A low-leakage thermal finger protection structure 7 is installed outside the refrigerator's cold fingers 1-2 to protect the refrigerator's cold fingers 1-2 from vibration during launch. The multi-source active vibration reduction control circuit collects data from the vibration feedback sensor 3, performs analysis and calculations, and generates control signals in the control core. The control drive module outputs signals through the refrigerator's drive input port 8, driving the refrigerator 1's opposing motor to achieve active vibration suppression. The vibration feedback sensor 3 and the refrigerator's drive input port 8 are connected to the multi-source active vibration reduction control circuit. The flexible cold chain 5 is installed at the end of the refrigerator's cold fingers 1-2. The upper end of the vibration isolation unlocking device 2 is connected to the integrated heat collecting plate 4. The vibration isolation unlocking device 2 is internally equipped with a locking mechanism.
[0024] like Figure 3 、 Figure 4 The integrated heat collector plate 4 shown is made of lightweight, highly thermally conductive, and high-strength materials. Heat pipes 4-6 are embedded within the main heat transfer path, eliminating the need for reinforcement in the heat transfer area and ensuring lightweight design. The main interfaces on the chiller 1 side include the chiller compressor mounting interface 4-2, the cold finger mounting interface 4-3, the air reservoir mounting interface 4-4, and the vibration isolation and unlocking device mounting interface 4-1. The main interface on the heat dissipation surface is the hot end mounting interface 4-5 of the flexible cold chain 5.
[0025] The refrigerator 1 and vibration isolation unlocking device 2 are mounted on one side of the integrated heat collector 4. The heat dissipation surfaces of the compressor 1-1, cold fingers 1-2, and air reservoir 1-3 ensure good thermal contact with the heat collector 4. The refrigerator includes the compressor 1-1, cold fingers 1-2, air reservoir 1-3, and a drive input port 8. A flexible cold chain 5 is mounted on the upper end of the cold finger 1-2, and the lower end of the cold finger 1-2 is mounted to the integrated heat collector 4, ensuring thermal contact.
[0026] like Figure 2 As shown, the flexible cold chain 5 has rigid sections 5-1 and 5-2 at its ends and a flexible section 5-3 in the middle. This section can be made of a low-rigidity, high-thermal-conductivity material, preferably a graphene cold chain. A low-temperature heat pipe 6 or other high-efficiency heat transfer element is connected to the rear end of the flexible cold chain 5 to transfer cold air. The flexible cold chain 5 and low-temperature heat pipe 6 can be combined into a flexible transmission link, using a flexible heat pipe or other heat transfer element.
[0027] The low-heat-leakage cold finger protection structure 7 can be configured as a non-contact, position-limiting cold finger protective cover with a polished interior surface to reduce radiative heat leakage. Alternatively, a cup-shaped epoxy fiberglass thin-wall support structure can be used to ensure cold finger reliability through ultra-low heat leakage and high strength. Figure 5 、 Figure 6 These are two implementations of a low-heat-leakage cold finger protection structure. The refrigerator uses a non-contact, position-limiting cold finger protection cover 7-1, the inner surface of which is polished to reduce radiative heat leakage. A cup-shaped epoxy fiberglass thin-wall support structure 7-2 ensures cold finger reliability through ultra-low heat leakage and high strength.
[0028] According to Figure 7 、 Figure 8 The vibration isolation unlocking device 2 shown includes a base 2-2, a vibration isolator 2-1, an upper base 2-3, a limit switch 2-4, and a locking mechanism 2-5. The locking mechanism 2-5 is installed inside the base 2-2 and connects the base 2-2 and the upper base 2-3 by screws. When the upper base 2-3 is launched, the locking mechanism 2-5 is locked, and the base 2-2 fits with the upper base 2-3. Before the refrigerator 1 works, the vibration isolation unlocking device is unlocked, and the vibration isolation unlocking base 2-2 and the upper base 2-3 are separated by the vibration isolator 2-1, and the vibration isolator 2-1 plays a role in vibration isolation. The two vibration isolators 2-1 are grouped together, and the axial stiffness of the device can be adjusted according to the layout and design stiffness. The base 2-2, vibration isolator 2-1, upper base 2-3, limit switch 2-4, and locking mechanism 2-5 are integrated into one, and the axial stiffness of the device can be adjusted according to the layout and design stiffness.
[0029] like Figure 9 The low-temperature heat pipe 6 shown has a cold end 6-1 connected to one end 5-1 of the flexible cold chain and a hot end 6-2 connected to the detector focal plane. The type of low-temperature heat pipe can be changed according to the actual temperature difference and heat transfer capacity requirements.
[0030] The active vibration reduction control circuit is directly connected to the drive input port 8 and the vibration feedback sensor 3 of multiple refrigerators 1. It includes three module functions: vibration acquisition, control core and drive output. The vibration acquisition unit realizes the vibration signal acquisition of each vibration source end. The control core completes the calculation of the collected vibration signal and generates a corresponding control signal to control the drive output module. The drive output module drives the opposed motor inside the corresponding vibration source refrigerator, which can play an active comprehensive suppression role for multiple vibration sources.
[0031] Specifically, such as Figure 10 As shown, the active vibration reduction control circuit includes a vibration acquisition module, a control core module, and a drive output module. The vibration acquisition module collects vibration signals from each vibration source. The control core module calculates the collected vibration signals and generates corresponding control signals to control the drive output module, which drives the opposing motors within the corresponding vibration source refrigerator. The multi-vibration source active vibration isolation device collects data from the vibration feedback sensor 3, performs analysis and calculations, and generates control signals in the control core module. The control drive module outputs a drive signal through the refrigerator's drive input port 8, driving the refrigerator's opposing motors to achieve active vibration suppression.
[0032] Specifically, such as Figure 11 The active vibration reduction control circuit shown here consists of a microprocessor, external hardware circuits, a compressor, and a vibration sensor. The microprocessor generates PWM waves, collects vibration signals, and uses an adaptive vibration reduction algorithm to output a signal y(n) based on a reference signal x(n). The PWM output from the microprocessor passes through an H-bridge, is filtered, and controls the compressor for proper operation. The generated vibration is collected by the vibration sensor and, after amplification, filtering, and conditioning, is returned to the microprocessor as the error signal e(n). Vibration reduction is achieved by one of the motors. After the adaptive vibration reduction algorithm, a vibration reduction signal equal in magnitude and opposite in direction to the compressor vibration signal is generated to offset the original vibration of the refrigerator.
[0033] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.
Claims
1. An aerospace-grade multi-vibration source, large cooling capacity, ultra-low vibration refrigerator device, characterized by: It includes a refrigerator, a vibration isolation unlocking device, a vibration feedback sensor, a multi-vibration source active vibration reduction control circuit, an integrated heat collecting plate, a flexible cold chain, a low-temperature heat pipe, and a low-leakage heat cold finger protection structure; the refrigerator is installed on one side of the integrated heat collecting plate and is completely heat-conductingly installed with the integrated heat collecting plate. The hot ends of the multiple flexible cold chains are installed on the other side of the integrated heat collecting plate to transfer the heat generated by the refrigerator to the heat dissipation plate outside the cabin and dissipate it into space. The vibration feedback sensor is installed to the vibration source end of the refrigerator, and the flexible cold chain is installed to the cold finger end of the refrigerator. The upper end of the vibration isolation unlocking device is connected to the integrated heat collecting plate, and the cold end of the low-temperature heat pipe is connected to the flexible cold chain. The multi-vibration source active vibration reduction control circuit drives the opposing motor of the refrigerator to achieve active suppression of vibration by collecting data from the vibration feedback sensor. The low-leakage heat cold finger protection structure is installed on the outside of the cold finger of the refrigerator.
2. The aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device according to claim 1, characterized in that: The heat collecting plate is made of lightweight, high thermal conductivity and high strength material, and a temperature equalizing heat pipe is embedded in the heat transfer path inside. The interface on one side of the heat collecting plate for installing the refrigerator includes a refrigerator compressor installation interface, a cold finger installation interface, an air reservoir installation interface, and a vibration isolation unlocking device installation interface. The interface on one side of the heat dissipation surface of the heat collecting plate is a flexible heat pipe hot end installation interface.
3. The aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device according to claim 1, characterized in that: The refrigerator includes a compressor, a cold finger, an air storage, and a drive input port. A flexible cold chain is installed at the upper end of the cold finger, and the lower end of the cold finger is installed to an integrated heat sink for thermal contact. The active vibration reduction control circuit is connected to the drive input port of the refrigerator.
4. The aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device according to claim 1, characterized in that: The low-leakage heat-limiting cold finger protection structure adopts a non-contact limiting cold finger protection cover.
5. The aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device according to claim 1, characterized in that: The low-leakage heat-cooling finger protection structure adopts a cup-shaped epoxy glass fiber reinforced plastic thin-wall support structure.
6. The aerospace-grade multi-vibration source large cooling capacity ultra-low vibration refrigerator device according to claim 1, characterized in that: The vibration isolation unlocking device includes a base, a vibration isolator, an upper base, a travel switch, and a locking mechanism. The locking mechanism is installed inside the base and the base and the upper base are connected by screws. During launch, the vibration isolation unlocking device is locked and the base and the upper base are fitted together.
7. The aerospace-grade multi-vibration source, large cooling capacity, ultra-low vibration refrigerator device according to claim 6, characterized in that: Before the refrigerator is operated, the vibration isolation unlocking device is unlocked, and the base and the upper base are separated by the vibration isolator, which plays a role in vibration isolation.
8. The aerospace-grade multi-vibration source, large cooling capacity, ultra-low vibration refrigerator device according to claim 1, characterized in that: The two ends of the flexible cold chain are fixed ends, and the middle part is a flexible section, which is connected to the back end of the flexible cold chain using a low-temperature heat pipe to transmit cold energy.
9. The aerospace-grade multi-vibration source, large cooling capacity, ultra-low vibration refrigerator device according to claim 1, characterized in that: The active vibration reduction control circuit includes a vibration acquisition module, a control core module and a drive output module. The vibration acquisition module collects the vibration signal from each vibration source end. The control core module calculates the collected vibration signal and generates corresponding control signals to control the drive output module. The drive output module drives the opposed motor inside the corresponding vibration source refrigerator.
10. The aerospace-grade multi-vibration source, large cooling capacity, ultra-low vibration refrigerator device according to claim 6, characterized in that: The vibration isolators form a group of two.
Citation Information
Patent Citations
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CN109405382A
Low-temperature optical mechanical system based on SiC particle reinforced aluminum matrix composite vacuum cooling box
CN110470392A
High-reliability refrigerator micro-vibration insulation system
CN115524010A
Pulse tube refrigerator and space infrared detection device
CN120274447A
Low vibration cryocooler
US20070056297A1