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CN-224214563-U - Spherical hinge structure of Stirling refrigerator and Stirling refrigerator

CN224214563UCN 224214563 UCN224214563 UCN 224214563UCN-224214563-U

Abstract

The utility model relates to a spherical hinge structure of a Stirling refrigerator and the Stirling refrigerator, wherein the spherical hinge structure comprises a connecting component and a plugging component, the connecting component comprises a first connecting piece and a second connecting piece, the plugging component comprises the first plugging piece and the second plugging piece, and the matching size of a sealing ring, a groove and the inner wall of a cavity is controlled by arranging the sealing ring in an annular groove of the second connecting piece, so that uniform and moderate compression quantity is formed, local stress concentration is avoided, and the friction loss on the surface of the sealing ring is greatly reduced. And there is the clearance that floats between shutoff subassembly and coupling assembling for the sealing washer can be in the motion in-process automatically regulated positional relationship, avoids the sealing washer to bear too big side force, provides stable operational environment for the sealing washer, ensures that the sealing washer still can maintain reliable sealing performance under long-term reciprocating motion operating mode.

Inventors

  • Request for anonymity

Assignees

  • 北京智创芯源科技有限公司

Dates

Publication Date
20260508
Application Date
20250715

Claims (10)

  1. 1. The spherical hinge structure of the Stirling refrigerator is characterized by comprising: the connecting assembly comprises a first connecting piece and a second connecting piece, and the first connecting piece is fixedly connected with the second connecting piece; The plugging assembly comprises a first plugging piece and a second plugging piece, wherein a cavity is formed by encircling the first plugging piece and the second plugging piece together, the second connecting piece is located in the cavity, an annular groove is formed in the outer periphery of the second connecting piece, a sealing ring is arranged in the annular groove, one side of the sealing ring is in butt joint with the other side of the annular groove, and the sealing ring is in butt joint with the inner wall of the cavity, so that sealing between the connecting assembly and the plugging assembly is achieved.
  2. 2. The spherical hinge structure according to claim 1, wherein an extension portion and a first welding portion are provided on a side of the first connecting member adjacent to the second connecting member, a concave hole and a second welding portion are provided on a side of the second connecting member adjacent to the first connecting member, the extension portion is inserted into the concave hole, and the first welding portion and the second welding portion are welded and fixed.
  3. 3. The ball hinge structure according to claim 2, wherein a guide portion is further provided at a side of the concave hole adjacent to the first connecting member.
  4. 4. The spherical hinge structure according to claim 2, wherein a first abutment surface is provided on a side of the concave hole away from the first connecting member, a second abutment surface is provided on a side of the protruding portion close to the second connecting member, and the first abutment surface abuts against the second abutment surface.
  5. 5. The spherical hinge structure according to claim 1, wherein a coaxial mating shaft and a third welding portion are disposed on a side of the first plugging member, which is close to the second plugging member, a coaxial mating slot and a fourth welding portion are disposed on a side of the second plugging member, which is close to the first plugging member, the coaxial mating shaft is inserted into the coaxial mating slot, and the third welding portion and the fourth welding portion are welded and fixed.
  6. 6. The spherical hinge structure according to claim 5, wherein a third abutment surface is provided on a side of the coaxial fitting groove hole away from the first blocking member, a fourth abutment surface is provided on a side of the coaxial fitting shaft close to the second blocking member, and the third abutment surface abuts against the fourth abutment surface.
  7. 7. The spherical hinge structure according to claim 1, wherein the inner diameter spherical surface of the first blocking member is R1, the inner diameter spherical surface of the second blocking member is R2, and the outer diameter spherical surface of the first blocking member is R3, r2=r1, and R3-R1 is not less than 0.3mm.
  8. 8. The spherical hinge structure according to claim 1, wherein a first air vent is provided in the first connecting member along a first direction, a second air vent is provided in the second connecting member along the first direction, and the first air vent and the second air vent are communicated.
  9. 9. The spherical hinge structure according to claim 1, wherein a connecting portion is provided on a side of the first connecting member away from the second connecting member, and a connecting thread is provided on the connecting portion.
  10. 10. The Stirling refrigerator is characterized by comprising the spherical hinge structure of the Stirling refrigerator according to any one of claims 1-9, and further comprising a heat regenerator and a pushing piston, wherein the second plugging piece is provided with a matching surface and a stop surface, the heat regenerator is matched and connected with the matching surface and is abutted with the stop surface, and the pushing piston is fixedly connected with the first connecting piece.

Description

Spherical hinge structure of Stirling refrigerator and Stirling refrigerator Technical Field The utility model relates to the technical field of infrared detectors, in particular to a spherical hinge structure of a Stirling refrigerator and the Stirling refrigerator. Background In recent years, with the wide application of infrared technology in the military fields of infrared imaging, reconnaissance warning, early warning monitoring, guidance, mid-high altitude remote air defense and the like, the infrared focal plane detector technology is rapidly developed. In the Dewar refrigerating assembly, which is a key component of the infrared detection system, the refrigerator plays an important role in providing a stable low-temperature environment for the detector. The heat regenerator is used as a core functional module of the refrigerator, and the structural design and the working characteristics of the heat regenerator determine the performance of the whole refrigerating system to a great extent. Specifically, the pushing piston in the heat regenerator assembly and the matched cylinder body form a precise kinematic pair, so that the heat exchange unit can perform precise reciprocating motion along the axial direction. During system integration, the heat exchange portion needs to be inserted accurately Du Waleng inside the finger when the refrigerator is coupled to the dewar assembly. Due to unavoidable tolerance stack-up during machining and assembly, minor misalignment between the crankcase and the dewar assembly tends to occur. By adopting the traditional rigid connection mode, the deviation easily causes friction between the tail end of the heat exchange unit and the inner wall of the cold finger, thereby not only generating extra mechanical loss, but also obviously affecting the overall working efficiency of the refrigerator. In order to solve the key technical problem, the modern heat regenerator components commonly adopt a spherical hinge connection scheme. However, after the existing spherical hinge is prepared, an aspheric part exists, the aspheric part can cause the deformation of the sealing ring to periodically and reciprocally change in the working process, the sealing ring is worn after long-term working, the sealing performance is reduced, and therefore the performance index of the refrigerator is damaged, and even the whole service life of the refrigerator is reduced. Disclosure of utility model The utility model provides a spherical hinge structure of a Stirling refrigerator and the Stirling refrigerator, which are used for solving at least one technical problem. In a first aspect, the present utility model provides a ball-and-socket structure for a stirling cooler, comprising: the connecting assembly comprises a first connecting piece and a second connecting piece, and the first connecting piece is fixedly connected with the second connecting piece; The plugging assembly comprises a first plugging piece and a second plugging piece, wherein a cavity is formed by encircling the first plugging piece and the second plugging piece together, the second connecting piece is located in the cavity, an annular groove is formed in the outer periphery of the second connecting piece, a sealing ring is arranged in the annular groove, one side of the sealing ring is in butt joint with the other side of the annular groove, and the sealing ring is in butt joint with the inner wall of the cavity, so that sealing between the connecting assembly and the plugging assembly is achieved. In one embodiment, a protruding portion and a first welding portion are arranged on one side, close to the second connecting piece, of the first connecting piece, a concave hole and a second welding portion are arranged on one side, close to the first connecting piece, of the second connecting piece, the protruding portion is inserted into the concave hole, and the first welding portion and the second welding portion are fixed in a welding mode. In one embodiment, a guide portion is further provided on a side of the concave hole near the first connecting member. In one embodiment, a first abutting surface is arranged on one side, away from the first connecting piece, of the concave hole, a second abutting surface is arranged on one side, close to the second connecting piece, of the protruding portion, and the first abutting surface abuts against the second abutting surface. In one embodiment, a coaxial matching shaft and a third welding part are arranged on one side, close to the second blocking piece, of the first blocking piece, a coaxial matching groove hole and a fourth welding part are arranged on one side, close to the first blocking piece, of the second blocking piece, the coaxial matching shaft is inserted into the coaxial matching groove hole, and the third welding part and the fourth welding part are fixed in a welding mode. In one embodiment, a third abutting surface is arranged on one side, far away from the first blocki