KR20020067295A - Structure for protecting gas leakage of cryocooler - Google Patents
Structure for protecting gas leakage of cryocooler Download PDFInfo
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- KR20020067295A KR20020067295A KR1020010007808A KR20010007808A KR20020067295A KR 20020067295 A KR20020067295 A KR 20020067295A KR 1020010007808 A KR1020010007808 A KR 1020010007808A KR 20010007808 A KR20010007808 A KR 20010007808A KR 20020067295 A KR20020067295 A KR 20020067295A
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- precooler
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- working gas
- gas
- cryogenic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1407—Pulse-tube cycles with pulse tube having in-line geometrical arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1412—Pulse-tube cycles characterised by heat exchanger details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1421—Pulse-tube cycles characterised by details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1423—Pulse tubes with basic schematic including an inertance tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
Abstract
Description
본 발명은 극저온 냉동기의 가스누설 방지구조에 관한 것으로, 특히 압축부와 냉동부를 견고하게 결합하여 압축부로부터 펌핑되는 작동가스의 누설을 방지할 수 있는 극저온 냉동기의 가스누설 방지구조에 관한 것이다.The present invention relates to a gas leakage preventing structure of a cryogenic refrigerator, and more particularly, to a gas leakage preventing structure of a cryogenic refrigerator that can be firmly coupled to the compression unit and the freezing unit to prevent leakage of working gas pumped from the compression unit.
일반적으로 극저온 냉동기는 소형 전자부품이나 초전도체 등의 냉각을 위하여 사용되는 저진동 고신뢰성의 냉동기로서, 작동가스를 압축하면서 펌핑시키는 압축부와 그 압축부로부터 펌핑되는 작동가스에 의해 극저온부를 갖는 냉동부로 크게 구성된다.In general, the cryogenic freezer is a low vibration high reliability refrigerator used for cooling small electronic parts or superconductors. The cryogenic freezer is a refrigeration part having a cryogenic part by a compression part for pumping and compressing working gas and a working gas pumped from the compression part. It is composed.
이러한 극저온 냉동기로는 주로 스터링 냉동기(Stirling Refrigerator)나 지엠 냉동기(GM Refrigerator)와 같은 열재생식 냉동기가 널리 알려져 있으나, 최근에는 스터링 냉동기의 변형으로서 냉동부에 구동유니트가 없어 구조적으로 단순하면서도 신뢰성이 우수한 맥동관 냉동기(Pulstube Refrigerator)에 관한 연구가 매우 활발하게 진행되고 있는 실정이다.Such cryogenic freezer is mainly known as a thermal regeneration freezer such as a Stirling Refrigerator or GM Refrigerator, but recently, as a variant of the Stirling Refrigerator, there is no driving unit in the freezer, so it is structurally simple and reliable. The research on the pulse tube refrigerator (Pulstube Refrigerator) is very active.
도 1은 종래 극저온 냉동기중에서 무윤활 맥동관식 극저온 냉동기의 일례를 보인 종단면도이다.Figure 1 is a longitudinal sectional view showing an example of a non-lubricating pulsating tube cryogenic cryo freezer in a conventional cryogenic freezer.
이에 도시된 바와 같이 종래의 무윤활 맥동관 냉동기는, 전술한 바와 같이 작동가스를 압축 펌핑하여 그 작동가스의 질량유동과 압력맥동을 일으키는 압축부와, 상기 압축부에 연통되어 작동가스의 질량유동과 압력맥동에 의해 극저온부가발생되는 냉동부로 구성되어 있다.As shown in the related art, a conventional non-lubricated pulsating tube refrigerator, as described above, compresses and pumps working gas to cause mass flow and pressure pulsation of the working gas, and a mass flow of working gas connected to the compression part. It consists of a freezing section where the cryogenic section is generated by over-pressure pulsation.
상기 압축부는 일단에 실린더(1a)가 구비된 케이싱(1)과, 그 케이싱(1)의 내부에 장착되는 리니어 모터(2)와, 그 리니어 모터(2)의 가동자에 결합되어 실린더(1a)에서 왕복운동을 하면서 작동가스를 압축하여 펌핑하는 피스톤(3)과, 그 피스톤(3)의 일측 양단에 결합되어 피스톤(3)의 직진성을 유지하는 판스프링(4A,4B)과, 상기 케이싱(1)의 외측단에 일체로 결합되어 피스톤(3)의 왕복운동에 따른 진동을 제거하는 패시브 밸런서(passive balancer)(5)를 포함하여 이루어져 있다.The compression section is coupled to a casing 1 having a cylinder 1a at one end thereof, a linear motor 2 mounted inside the casing 1, and a mover of the linear motor 2, and coupled to the cylinder 1a. Piston (3) for compressing and pumping the working gas while reciprocating in), plate springs (4A, 4B) coupled to one end of the piston (3) to maintain the straightness of the piston (3), and the casing It comprises a passive balancer (5) integrally coupled to the outer end of (1) to remove the vibration caused by the reciprocating motion of the piston (3).
상기 냉동부는 압축부의 실린더(1a) 선단에 연통되어 작동가스의 온도를 낮추는 예냉기(after cooler)(6)와, 그 예냉기(6)에 연통되어 작동가스의 현열을 저장하는 재생기(7)와, 그 재생기(7)에 연통되어 작동가스의 질량유동 및 압력맥동에 의해 극저온부(냉측 열교환기)(8a)를 갖는 맥동관(8)과, 그 맥동관(8)에 축소 연통되어 작동가스를 팽창시키는 이너턴스 튜브(innertance tube)(9)와, 그 이너턴스 튜브(9)의 끝단에 확장 연통되어 이너턴스 튜브와 함께 작동가스의 위상차를 발생시키는 레저버(reservoir)(10)를 포함하여 이루어져 있다.The refrigerating unit communicates with the tip of the cylinder 1a of the compression unit to reduce the temperature of the working gas, and a regener 7 which communicates with the precooler 6 to store sensible heat of the working gas. And a pulsating tube 8 communicating with the regenerator 7 and having a cryogenic portion (cold-side heat exchanger) 8a by mass flow and pressure pulsation of the working gas, and reduced-communicating operation with the pulsating tube 8. An inner tube 9 which expands the gas and a reservoir 10 which is extended in communication with the end of the inner tube 9 to generate a phase difference of the working gas together with the inner tube. Consists of including.
상기 케이싱(1)의 실린더(1a)측 선단면과 이에 대응되는 예냉기(보다 정확하게는, 예냉기 몸체)(6)의 측면이 도 2에 도시된 바와 같이 평평하게 형성되어 일차원적 면접촉으로 결합되고, 상기 실린더(1a)측 선단면과 예냉기(6)의 일측면 사이에는 실린더(1a)의 작동가스가 펌핑되면서 누설되는 것을 방지하도록 오-링(O-ring)(O)이 삽입 개재되어 있다.The front end surface of the cylinder 1a side of the casing 1 and the corresponding side surface of the precooler (more precisely, the precooler body) 6 are formed flat as shown in FIG. O-ring (O) is inserted between the front end of the cylinder (1a) side and one side of the precooler (6) to prevent leakage of the working gas of the cylinder (1a) by pumping Intervened.
도면중 미설명 부호인 8b는 온측 열교환기, 11은 진공셸, B는 체결볼트이다.In the figure, 8b is an on-side heat exchanger, 11 is a vacuum shell, and B is a fastening bolt.
상기와 같은 종래 무윤활 맥동관 냉동기는 다음과 같이 동작된다.The conventional non-lubricated pulsating tube freezer as described above is operated as follows.
즉, 상기 압축부의 리니어 모터(2)가 피스톤(3)과 함께 구동되어 작동가스를 압축하여 펌핑하게 되는데, 먼저 상기 피스톤(3)의 전진운동시에는 실린더(1a) 내의 작동가스가 냉동부의 예냉기(6) 및 재생기(7)를 거쳐 냉각되면서 맥동관(8)으로 유입되어 그 맥동관(8) 내의 작동가스를 압축시키게 되고, 이후 고압과정 동안 상기 맥동관(8)내의 작동가스는 온측 열교환기(8b)에서 외부로 열을 방출하게 된다.That is, the linear motor 2 of the compression unit is driven together with the piston 3 to compress and pump the working gas. At the time of the forward movement of the piston 3, the working gas in the cylinder 1a is an example of the freezing unit. Cooled through the cold air 6 and the regenerator 7 flows into the pulsating tube 8 to compress the working gas in the pulsating tube 8, the operating gas in the pulsating tube 8 during the high pressure process is on the The heat is emitted to the outside from the heat exchanger (8b).
반면, 상기 피스톤(3)의 후진운동시에는 맥동관(8)내의 작동가스가 재생기(7)를 냉각시키면서 예냉기(6)를 거쳐 실린더(1a)로 반출되므로 상기한 맥동관(8)내의 작동가스가 단열 팽창되어 온도가 저하되고, 이 과정에서 상기 재생기(7)에 연결된 맥동관(8)의 극저온부(냉측 열교환기)(8a)를 통과하는 작동가스가 열을 흡수하여 상기한 극저온부(8a)는 냉동효과를 얻게 된다. 이후, 저압과정 동안 상기 맥동관(8)내의 작동가스는 레저버(10) 및 이너턴스 튜브(9)를 통해 반입되는 작동가스에 의해 단열 압축되어 처음의 온도로 가열되는 일련의 과정을 반복하게 된다.On the other hand, during the backward movement of the piston 3, the working gas in the pulsating tube 8 is carried out to the cylinder 1a through the precooler 6 while cooling the regenerator 7, so that the pulsating tube 8 The working gas is adiabaticly expanded and the temperature is lowered. In this process, the working gas passing through the cryogenic portion (cold-side heat exchanger) 8a of the pulsation tube 8 connected to the regenerator 7 absorbs heat and thus, the cryogenic temperature described above. The part 8a obtains the freezing effect. Thereafter, during the low pressure process, the working gas in the pulsating tube 8 is repeatedly adiabatic compressed by the working gas introduced through the reservoir 10 and the inductance tube 9 and heated to the initial temperature. do.
이러한 일련의 과정중에 상기 맥동관(8)의 극저온부(8a)에서는 온도구배가 발생되면서 표면온도가 영하 200℃ 이하까지 내려가게 되어 그 극저온부(8a)에 부착되는 소형 전자부품이나 초전도체 소자 등을 극저온으로 냉각시키게 되는 것이었다.During such a series of processes, the temperature gradient is generated in the cryogenic portion 8a of the pulsating tube 8 and the surface temperature is lowered to below 200 ° C., so that a small electronic component or a superconductor element is attached to the cryogenic portion 8a. It was to be cooled to cryogenic temperature.
그러나, 상기와 같은 종래 맥동관식 무윤활 냉동기에서는, 전술한 바와 같이실린더(1a)측 선단면과 이에 대응되는 예냉기(6)의 일측면이 모두 평평하게 형성되어 서로 밀착된 상태에서 체결볼트(B)로 조여져 긴밀하게 결합되는 것이었으나, 실제로는 케이싱(1)과 예냉기(6)가 가공오차 또는 조립오차에 의해 불안정하게 조립될 우려도 있고 외부로부터 충격을 받을 경우 쉽게 이격되어 작동가스가 누설될 소지가 있었다.However, in the conventional pulsation tube type non-lubricating freezer as described above, as described above, one end surface of the cylinder 1a side and one side surface of the precooler 6 corresponding thereto are formed flat and tightly coupled to each other ( It was tightened by B), but the casing 1 and precooler 6 may be unstablely assembled due to machining or assembly error. In case of impact from the outside, the working gas is easily separated. There was a possibility of leakage.
본 발명은 상기와 같은 종래 맥동관식 무윤활 냉동기가 가지는 문제점을 감안하여 안출한 것으로, 압축부와 냉동부가 견고하게 결합될 수 있는 극저온 냉동기의 가스누설 방지구조를 제공하는데 그 목적이 있다.The present invention has been made in view of the above problems with the conventional pulsating tube type non-lubricating freezer, and an object thereof is to provide a gas leakage preventing structure of the cryogenic freezer that can be firmly coupled to the compression unit and the freezing unit.
도 1은 종래 맥동관 냉동기의 일례를 보인 종단면도.1 is a longitudinal sectional view showing an example of a conventional pulsating tube refrigerator.
도 2는 종래 맥동관 냉동기에서 압축부와 냉동부의 조립상태를 보인 종단면도.Figure 2 is a longitudinal sectional view showing an assembly state of the compression unit and the freezer in the conventional pulsating tube refrigerator.
도 3은 본 발명 맥동관 냉동기에서 압축부와 냉동부의 조립상태를 보인 종단면도.Figure 3 is a longitudinal sectional view showing the assembled state of the compression unit and the freezing unit in the present invention pulse tube refrigerator.
도 4는 본 발명 맥동관 냉동기에서 압축부와 냉동부의 조립구조를 분해하여 보인 사시도.Figure 4 is an exploded perspective view showing the assembly structure of the compression unit and the freezing unit in the present invention pulsating tube refrigerator.
** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **
1a : 실린더 100 : 케이싱1a: Cylinder 100: Casing
110 : 결합돌부 120 : 체결홈110: coupling protrusion 120: fastening groove
200 : 예냉기 210 : 결합홈부200: precooler 210: coupling groove
220 : 관통공 B : 체결볼트220: through hole B: fastening bolt
O : 오-링O: O-ring
본 발명의 목적을 달성하기 위하여, 리니어 모터에 의해 직선으로 왕복운동을 하는 피스톤이 미끄러지게 삽입되어 상기한 리니어 모터의 가동자와 함께 왕복운동을 하면서 작동가스가 압축 펌핑되는 실린더에 상기한 작동가스를 미리 적정온도로 냉각시켜 맥동관으로 유입시키는 예냉기가 결합되되, 상기 실린더의 선단면과 이에 대응되는 예냉기의 대응면 중 어느 한 쪽에는 결합돌부를 양각지게 형성하는 반면 다른 한 쪽에는 상기한 결합돌부가 삽입되어 요철물림으로 결합되도록 결합홈부가 음각지게 형성되어 이루어지는 것을 특징으로 하는 극저온 냉동기의 가스누설 방지구조가 제공된다.In order to achieve the object of the present invention, a linear reciprocating piston is linearly inserted by a linear motor and the working gas is compressed and pumped into a cylinder while the reciprocating motion is performed with the mover of the linear motor. The precooler is cooled to a predetermined temperature and introduced into the pulsating tube, which is coupled to one of the front end surface of the cylinder and the corresponding surface of the precooler corresponding thereto, while the coupling protrusion is embossed on the other side. It is provided with a gas leakage preventing structure of the cryogenic freezer, characterized in that the coupling groove is formed in a concave shape so that the coupling protrusion is inserted into the uneven bite.
이하, 본 발명에 의한 극저온 냉동기의 가스누설 방지구조를 첨부도면에 도시된 일실시예에 의거하여 상세히 설명한다.Hereinafter, the gas leakage preventing structure of the cryogenic freezer according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.
도 3은 본 발명 맥동관 냉동기에서 압축부와 냉동부의 조립상태를 보인 종단면도이고, 도 4는 본 발명 맥동관 냉동기에서 압축부와 냉동부의 조립구조를 분해하여 보인 사시도이다.Figure 3 is a longitudinal cross-sectional view showing an assembly state of the compression unit and the freezing unit in the present invention pulsating tube refrigerator, Figure 4 is a perspective view showing the assembly structure of the compression unit and the freezing unit in the pulsating tube refrigerator of the present invention.
이에 도시된 바와 같이 본 발명에 의한 가스누설 방지구조가 구비된 맥동관식 무윤활 냉동기는, 작동가스를 압축 펌핑하는 압축부와, 상기 압축부에 연통되어 작동가스의 질량유동과 압력맥동에 의해 극저온부가 발생되는 냉동부로 구성된다.As shown therein, the pulsation tube type non-lubricating freezer equipped with the gas leakage preventing structure according to the present invention includes a compression unit for compressing and pumping the working gas, and a low temperature due to the mass flow and the pressure pulsation of the working gas connected to the compression unit. It consists of a freezing section in which an addition is generated.
상기 압축부는 일단에 실린더(1a)가 구비된 케이싱(100)과, 그 케이싱(100)의 내부에 장착되는 리니어 모터(도 1에 도시)(2)와, 그 리니어 모터(2)의 가동자에 결합되는 피스톤(도 1에 도시)(3)과, 그 피스톤(3)의 일측 양단에 결합되는 판스프링(도 1에 도시)(4A,4B)과, 상기 케이싱(100)의 외측단에 일체로 결합되는 패시브 밸런서(도 1에 도시)(5)를 포함하여 이루어진다.The compression section includes a casing 100 having a cylinder 1a at one end thereof, a linear motor (shown in FIG. 1) 2 mounted inside the casing 100, and a movable member of the linear motor 2. To a piston (shown in FIG. 1) 3 coupled to one end of one side of the piston 3, a leaf spring (shown in FIG. 1) 4A, 4B, and an outer end of the casing 100. A passive balancer (shown in FIG. 1) 5 is integrally coupled.
상기 냉동부는 압축부의 실린더(1a) 선단에 연통되는 예냉기(200)와, 그 예냉기(200)에 연통되는 재생기(도 1에 도시)(7)와, 그 재생기(7)에 연통되어 극저온부(냉측 열교환기)(도 1에 도시)(8a)가 형성되는 맥동관(도 1에 도시)(8)과, 그 맥동관(8)에 축소 연통되어 작동가스의 위상차를 발생시키는 이너턴스 튜브(도 1에 도시)(9) 및 레저버(도 1에 도시)(10)를 포함하여 이루어진다.The refrigerating unit communicates with the precooler 200 communicated with the tip of the cylinder 1a of the compression unit, the regenerator (shown in FIG. 1) communicated with the precooler 200, and the regenerator 7 and the cryogenic temperature. An pulsation tube (shown in FIG. 1) 8 in which a portion (cold side heat exchanger) (shown in FIG. 1) 8a is formed and an inductance reduced in communication with the pulsation tube 8 to generate a phase difference of the working gas. It comprises a tube (shown in FIG. 1) 9 and a reservoir (shown in FIG. 1) 10.
상기 케이싱(100)의 실린더(1a)측 선단면은 측면투영시 양각지게 단차져 결합돌부(110)가 형성되는 반면, 이에 대응되는 예냉기(보다 정확하게는, 예냉기 몸체)(200)의 일측면은 상기한 결합돌부(110)가 맞춤결합되도록 측면투영시 음각지게 단차져 결합홈부(210)가 형성되어 수개의 체결볼트(B)로 결합된다.The cylinder 1a side end surface of the casing 100 is stepped to be embossed during side projection, so that the engaging protrusion 110 is formed, whereas one of the precoolers (more precisely, the precooler body) 200 corresponding thereto is formed. The side is stepped to be intaglio during side projection so that the coupling protrusion 110 is tailored to the coupling groove 210 is formed is coupled to several fastening bolts (B).
상기 케이싱(100)의 실린더(1a)측 선단면과 이에 대응되는 예냉기(200)의 일측면 사이에는 작동가스가 펌핑되면서 누설되는 것을 방지하도록 오-링(O-ring)(O)이 삽입 개재된다.An O-ring (O) is inserted between the front end surface of the cylinder 1a side of the casing 100 and one side surface of the precooler 200 corresponding thereto to prevent leakage of the working gas while being pumped. It is interposed.
도면중 종래와 동일한 부분에 대하여는 동일한 부호를 부여하였다.In the drawings, the same reference numerals are given to the same parts as in the prior art.
도면중 미설명 부호인 120 및 220은 각각 체결홈 및 관통공이다.In the drawings, reference numerals 120 and 220 denote fastening grooves and through holes, respectively.
상기와 같은 본 발명에 의한 극저온 냉동기의 가스누설 방지구조는 다음과 같은 작용효과를 갖는다.Gas leakage preventing structure of the cryogenic freezer according to the present invention as described above has the following effects.
즉, 상기 압축부의 피스톤(3)이 리니어 모터(2)의 가동자와 함께 구동되어 실린더의 작동가스를 압축하여 펌핑하게 되고, 이 펌핑되는 작동가스는 냉동부의 예냉기(200) 및 재생기(7)를 거쳐 냉각되면서 맥동관(8)으로 유입되어 압축 및 팽창되었다가 다시 재생기(7)와 예냉기(200)를 거쳐 실린더(1a)로 반입되는 일련의 과정을 반복하게 된다.That is, the piston 3 of the compression unit is driven together with the mover of the linear motor 2 to compress and pump the working gas of the cylinder, and the pumped working gas is precooler 200 and the regenerator 7 of the freezing unit. Cooling through the) is introduced into the pulsating tube (8) is compressed and expanded, and then a series of processes to be carried back to the cylinder (1a) through the regenerator (7) and the precooler (200).
이때, 상기 케이싱(100)의 실린더(1a)측 선단면과 이에 대응 결합되는 예냉기(정확하게는, 예냉기 몸체)(200)가 외부로부터 측하중을 받아 미세틈새가 발생하게 되는 경우 그 미세틈새를 통해 작동가스가 누설되게 되나, 본 발명에서와 같이 상기 예냉기(200)의 결합홈부(210)에 케이싱(100)의 결합돌부(110)가 삽입되어 체결볼트(B)로 체결 고정되므로 냉동기의 압축부 또는 냉동부가 외부로부터 측하중을 받더라도 상기한 체결볼트(B)의 체결력은 물론 결합홈부(210)와 결합돌부(110)가 측하중에 대한 저항력을 발휘하게 되어 압축부와 냉동부가 측하중에 의해 쉽게 이격되는 것을 방지할 수 있다.At this time, when the front end surface of the cylinder (1a) side of the casing 100 and the precooler (exactly, the precooler body) 200 coupled thereto are subjected to side loads from the outside, the microgap is generated. The working gas is leaked through, but as in the present invention, the coupling protrusion 110 of the casing 100 is inserted into the coupling groove 210 of the precooler 200 to be fastened and fixed by the fastening bolt B, thereby allowing the refrigerator to freeze. Even if the compression part or the freezing part of the side load from the outside as well as the fastening force of the fastening bolt (B) as well as the coupling groove 210 and the engaging protrusion 110 exhibits a resistance to the side load and the compression part and the freezing part side Easily spaced apart by the load can be prevented.
또한, 상기 케이싱(100)의 실린더(1a)측 선단면과 이에 대응되는 예냉기(200) 사이에 오-링(O)이 개재되어 있어 압축부와 냉동부가 미세하게 벌어지더라도 상기한 오-링(O)에 의해 작동가스가 누설되는 것을 일차적으로 방지할 수 있다.In addition, the O-ring (O) is interposed between the front end surface of the cylinder (1a) side of the casing 100 and the precooler 200 corresponding thereto, so that the compression part and the freezing part are minutely opened. The leakage of the working gas by the ring O can be prevented primarily.
본 발명에 의한 극저온 냉동기의 가스누설 방지구조는, 실린더와 이에 대응되는 예냉기를 요철물림으로 결합함으로써, 외부로부터 불의의 측하중이 부과되더라도 실린더의 선단면과 이에 대응되는 예냉기가 쉽게 이격되지 않아 피스톤의 왕복운동시 펌핑되는 작동가스가 실린더의 선단면과 예냉기 사이로 누설되는 것을 미연에 방지할 수 있다.Gas leakage prevention structure of the cryogenic freezer according to the present invention, by combining the cylinder and the precooler corresponding to the uneven bite, even if an unexpected side load is imposed from the outside, the front end surface of the cylinder and the corresponding precooler are not easily separated from the piston It is possible to prevent the operating gas pumped during the reciprocating movement from leaking between the front end of the cylinder and the precooler.
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| CN108253652A (en) * | 2018-01-10 | 2018-07-06 | 中国科学院上海技术物理研究所 | A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator |
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