High-reliability refrigerating machine micro-vibration suppression system for space

Abstract

The invention relates to a high-reliability refrigerating machine micro-vibration suppression system for space. The high-reliability refrigerating machine micro-vibration suppression system comprises a detector, a cold plate, a flexible cold chain, a supporting column, a refrigerating machine cold finger, a cabin plate, a mounting base plate, a coupling flange, a cold head, a connecting pipe, a dynamic vibration absorber, a compressor, a cold box, a vacuum cavity, an outer corrugated pipe, a vacuum pump suction pipe and a vacuum pump. According to the high-reliability refrigerating machine micro-vibration suppression system for the space, the dynamic vibration absorber is adopted for absorbing vibration of the cold head of the refrigerating machine while effective supporting of the transmitting section and micro-vibration isolation in the on-orbit period are achieved, micro-vibration of the refrigerating machine is further suppressed and isolated, and the refrigerating efficiency is improved. The device has the advantages of high reliability, simple structure, low cost and thorough micro-vibration suppression; vibration isolation is achieved through the environment difference between the space and the ground, operation is not needed after in-orbit operation, automatic unlocking is achieved, and surrounding structures and loads are friendly and free of damage.

Description

Technical Field

[0001] The present invention relates to the field of satellite technology, and more specifically, to a high-reliability refrigerator micro-vibration suppression system for space use. Background Art

[0002] With the development of space infrared remote sensing technology, the demand for cooling capacity of low-temperature refrigerators has also increased. The micro-vibration disturbance force generated by large-capacity refrigerators during normal operation is relatively large. If these disturbance forces are not suppressed, they will be directly transmitted to the satellite through the satellite cabin, which may affect the satellite attitude, or be secondary transmitted to other sensitive payloads, resulting in micro-vibration amplification, which seriously interferes with the normal operation of the payload. If a flexible structure is directly used between the refrigerator and the satellite cabin, the transmission path of the refrigerator's micro-vibration can be cut off, but the mechanical environment during the launch phase will cause serious damage to the refrigerator. In the past, pyrotechnics or memory alloys were used. The mechanism was in a locked state during the launch phase, and it was remotely powered on and unlocked after being in orbit to achieve the suppression and isolation of the refrigerator's micro-vibration. However, the above systems all have disadvantages such as complex structure, low reliability, and high cost, and may even cause damage to surrounding loads. There are great quality and safety risks in engineering applications. Summary of the invention

[0003] The embodiments of the present application provide a high-reliability refrigerator micro-vibration suppression system for space use. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0004] The embodiment of the present application provides a high-reliability space refrigerator micro-vibration suppression system, which includes: a detector, a cold plate, a flexible cold chain, a support column, a refrigerator cold finger, a cabin plate, a mounting base plate, a coupling flange, a cold head, a connecting pipe, a dynamic vibration absorber, a compressor, a cold box, a vacuum chamber, an outer bellows, a vacuum pump suction pipe, and a vacuum pump, wherein:

[0005] The detector is adhered to the cold plate;

[0006] The top end of the flexible cold chain is connected to the cold plate, and the bottom end is connected to the cold finger of the refrigerator;

[0007] The top end of the support column is connected to the cold plate, and the bottom end is connected to the mounting base plate;

[0008] The mounting base plate is connected to the cabin plate;

[0009] The coupling flange is placed on the cold head, and the connecting pipe connects the cold head and the compressor;

[0010] The dynamic vibration absorber is installed at the tail of the cold head;

[0011] One end of the outer bellows is connected to the mounting base plate, and the other end is connected to the coupling flange;

[0012] The interior of the cold box is the vacuum chamber, and the vacuum pump is connected to the vacuum chamber through the vacuum pump suction pipe.

[0013] According to a preferred embodiment, the inner bellows is also included, and the outer bellows and the inner bellows are nested with each other to form a closed cavity therebetween.

[0014] According to a preferred embodiment, it further comprises a suction nozzle, wherein the suction nozzle is connected to the closed cavity, and the vacuum cavity is connected to the closed cavity through the suction nozzle.

[0015] According to a preferred embodiment, it further comprises a bellows upper flange, and the outer bellows and the inner bellows are connected to the mounting base plate via the bellows upper flange.

[0016] According to a preferred embodiment, it further comprises a bellows lower flange, and the outer bellows and the inner bellows are connected to the coupling flange via the bellows lower flange.

[0017] According to a preferred embodiment, a connecting rod is further included, and the dynamic vibration absorber is connected to the tail of the cold head through the connecting rod.

[0018] According to a preferred embodiment, a hole is provided at the center of the mounting substrate, and the cold finger of the refrigerator extends into the cold box through the center hole on the mounting substrate.

[0019] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0020] In an embodiment of the present application, a high-reliability refrigerator micro-vibration suppression system comprises: a detector, a cold plate, a flexible cold chain, a support column, a refrigerator cold finger, a cabin plate, a mounting base plate, a coupling flange, a cold head, a connecting pipe, a dynamic vibration absorber, a compressor, a cold box, a vacuum chamber, an external bellows, a vacuum pump suction pipe, and a vacuum pump, wherein: the detector is adhered to the cold plate; the top end of the flexible cold chain is connected to the cold plate, and the bottom end is connected to the refrigerator cold finger; the top end of the support column is connected to the cold plate, and the bottom end is connected to the mounting base plate; the mounting base plate is connected to the cabin plate; the coupling flange is placed on the cold head, and the connecting pipe connects the cold head and the compressor; the dynamic vibration absorber is installed at the tail of the cold head; one end of the outer bellows is connected to the mounting base plate, and the other end is connected to the coupling flange; the interior of the cold box is the vacuum chamber, and the vacuum pump is connected to the vacuum chamber through the vacuum pump suction pipe. A high-reliability refrigerator micro-vibration suppression system described in an embodiment of the present application utilizes the environmental differences between space and the ground to achieve vibration isolation. It does not require any operation once on orbit and is automatically unlocked, which is friendly and non-destructive to surrounding structures and payloads. While achieving effective support for the launch segment and isolation of micro-vibrations while on orbit, a dynamic vibration absorber is used to absorb vibrations of the refrigerator to further suppress and isolate micro-vibrations of the refrigerator. No electromechanical control technology is used, and it has the advantages of high reliability, simple structure, low cost, and thorough micro-vibration suppression.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0023] Figure 1 This is a schematic diagram of the on-orbit operation of a high-reliability refrigerator micro-vibration suppression system for space use provided by an embodiment of the present application;

[0024] Figure 2 This is a pre-launch schematic diagram of a high-reliability refrigerator micro-vibration suppression system for space use provided in an embodiment of the present application.

[0025] Figure markings: 1-detector; 2-cold plate; 3-flexible cold chain; 4-support column; 5-refrigeration machine cold finger; 6-cabin plate; 7-mounting base plate; 8-enclosed chamber; 9-coupling flange; 10-cold head; 11-connecting pipe; 12-connecting rod; 13-dynamic vibration absorber; 14-compressor; 15-vacuum chamber; 16-cold box; 17-nozzle; 18-bellows upper flange; 19-outer bellows; 20-inner bellows; 21-bellows lower flange; 22-vacuum pump suction pipe; 23-vacuum pump. DETAILED DESCRIPTION

[0026] The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.

[0027] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples of systems and methods consistent with some aspects of the present invention as detailed in the attached claims.

[0029] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previously associated objects are in an "or" relationship.

[0030] The following will be combined with the attached Figure 1 -Attached Figure 2 , a high-reliability refrigerator micro-vibration suppression system for space use provided in an embodiment of the present application is introduced in detail.

[0031] The embodiments of the present application overcome the shortcomings of the prior art and utilize the difference in vacuum levels between space and the ground to propose a refrigerator micro-vibration suppression system. While achieving high-rigidity support in the launch stage and micro-vibration suppression while in orbit, a dynamic vibration absorber is used to absorb vibrations of the refrigerator. The system has the advantages of high reliability, simple structure, low cost, and thorough micro-vibration suppression.

[0032] See also Figure 1 , which is a schematic diagram of the on-orbit operation of a high-reliability refrigerator micro-vibration suppression system for space use according to an embodiment of the present application. Figure 1As shown, a high-reliability refrigerator micro-vibration suppression system for space use described in an embodiment of the present application may include: a detector (1), a cold plate (2), a flexible cold chain (3), a support column (4), a refrigerator cold finger (5), a cabin plate (6), a mounting base plate (7), a coupling flange (9), a cold head (10), a connecting pipe (11), a dynamic vibration absorber (13), a compressor (14), a cold box (16), a vacuum chamber (15), an outer bellows (19), a vacuum pump suction pipe (22), and a vacuum pump (23), wherein:

[0033] The detector (1) is bonded to the cold plate (2);

[0034] The top end of the flexible cold chain (3) is connected to the cold plate (2), and the bottom end is connected to the cold finger (5) of the refrigerator;

[0035] The top end of the support column (4) is connected to the cold plate (2), and the bottom end is connected to the mounting base plate (7);

[0036] The mounting base plate (7) is connected to the cabin plate (6);

[0037] The coupling flange (9) is placed on the cold head (10), and the connecting pipe (11) connects the cold head (10) and the compressor (14);

[0038] A dynamic vibration absorber (13) is installed at the rear of the cold head (10);

[0039] One end of the outer bellows (19) is connected to the mounting base plate (7), and the other end is connected to the coupling flange (9);

[0040] The interior of the cold box (16) is a vacuum chamber (15), and the vacuum pump (23) is connected to the vacuum chamber (15) through a vacuum pump suction pipe (22).

[0041] Specifically, in the embodiment of the present application, it also includes an inner bellows (20), a bellows upper flange (18), and a bellows lower flange (21); the outer bellows (19) and the inner bellows (20) are nested with each other to form a closed cavity (8) therebetween; the outer bellows (19) and the inner bellows (20) are connected to the mounting base plate (7) via the bellows upper flange (18); the outer bellows (19) and the inner bellows (20) are connected via the bellows lower flange (21). The invention is connected to a coupling flange (9); further comprising a suction nozzle (17), the suction nozzle (17) being connected to a closed chamber (8), and the vacuum chamber (15) being connected to the closed chamber (8) through the suction nozzle (17); further comprising a connecting rod (12), and the dynamic vibration absorber (13) being connected to the tail of the cold head (10) through the connecting rod (12); a hole is provided at the center of the mounting substrate (7), and the cold finger (5) of the refrigerator extends into the cold box (16) through the center hole on the mounting substrate (7).

[0042] Before launching, Figure 2As shown, the vacuum chamber (15) is evacuated by a vacuum pump (23) and a vacuum pump suction pipe (22), and the vacuum chamber (15) and the closed chamber (8) are connected through a suction nozzle (17), so that the closed chamber (8) and the vacuum chamber (15) are in a stable high vacuum state. At this time, the external atmospheric pressure compresses the outer bellows (19), so that the outer bellows (19) is in a tightened state, which plays an effective structural support role. Then, the vacuum pump suction pipe (22) is cut off by cold pressure welding or the like, and the closed chamber (8) and the vacuum chamber (15) maintain a negative pressure state unchanged; after launching into orbit, as shown in FIG. Figure 1 As shown, the air pressure is reduced, and the vacuum degree of the outside is close to or the same as the vacuum degree of the closed chamber (8) and the vacuum chamber (15). At this time, the inner bellows (20) and the outer bellows (19) are released at the same time, and the cold head (10) moves freely; when the refrigerator is powered on, the dynamic vibration absorber (13) plays a role, offsetting the micro-vibration winding force of the cold head (10), and the system plays a vibration suppression role.

[0043] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0044] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A high-reliability refrigerator micro-vibration suppression system, characterized in that: include: Detector, cold plate, flexible cold chain, support column, refrigerator cold finger, cabin plate, mounting base plate, coupling flange, cold head, connecting pipe, dynamic vibration absorber, compressor, cold box, vacuum chamber, outer bellows, vacuum pump suction pipe, vacuum pump, including: The detector is adhered to the cold plate; The top end of the flexible cold chain is connected to the cold plate, and the bottom end is connected to the cold finger of the refrigerator; The top end of the support column is connected to the cold plate, and the bottom end is connected to the mounting base plate; The mounting base plate is connected to the cabin plate; The coupling flange is placed on the cold head, and the connecting pipe connects the cold head and the compressor; The dynamic vibration absorber is installed at the tail of the cold head; One end of the outer bellows is connected to the mounting base plate, and the other end is connected to the coupling flange; The interior of the cold box is the vacuum chamber, and the vacuum pump is connected to the vacuum chamber through the vacuum pump suction pipe.

2. The high-reliability refrigerator micro-vibration suppression system according to claim 1, characterized in that: It also includes the inner bellows, the outer bellows and the inner bellows are nested with each other to form a closed cavity between the two.

3. The high-reliability refrigerator micro-vibration suppression system according to claim 2, characterized in that: It also includes a suction nozzle, which is connected to the closed cavity, and the vacuum cavity is connected to the closed cavity through the suction nozzle.

4. The high-reliability refrigerator micro-vibration suppression system according to claim 3, characterized in that: It also includes a bellows upper flange, and the outer bellows and the inner bellows are connected to the mounting base plate through the bellows upper flange.

5. The high-reliability refrigerator micro-vibration suppression system according to claim 4, characterized in that: It also includes a bellows lower flange, and the outer bellows and the inner bellows are connected to the coupling flange through the bellows lower flange.

6. The high-reliability refrigerator micro-vibration suppression system according to claim 5, characterized in that: It also includes a connecting rod, and the dynamic vibration absorber is connected to the tail of the cold head through the connecting rod.

7. The high-reliability refrigerator micro-vibration suppression system according to claim 1, characterized in that: A hole is provided at the center of the mounting substrate, and the cold finger of the refrigerator extends into the cold box through the center hole on the mounting substrate.

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