Conical structure heat-sink design at seal head of vacuum container

Abstract

The invention discloses a conical structure heat-sink design at a seal head of a vacuum container. The design mainly comprises a framework (1), an upper liquid converging header pipe (2), a branch pipe (3), fins (4) and a lower liquid inlet header pipe (5). The structural forms and selected materials of a heat-sink wallboard are different according to different adsorbed gases, and a common wallboard is welded by a copper fin (1) and a stainless steel branch pipe (2), wherein the stainless steel branch pipe is communicated with a refrigerating medium; the variety of the medium depends on the properties of flow field gases; and the common medium is liquid nitrogen, liquid hydrogen, liquid helium, and the like. During work, fluid flows in from the lower part of the conical heat sink and flows out of the upper part of the conical heat sink. Therefore, the effective space at the seal head of the vacuum container is fully utilized, the plume adsorption area is enlarged, and the static vacuum degree and dynamic vacuum degree inside the vacuum container are improved. The conical structure heat-sink design is applied to liquid helium heat-sink design, and is also applied to liquid nitrogen heat-sink design.

Description

【Technical field】 [0001] The invention relates to the design of a heat sink with a conical structure for a vacuum container head used in thermal vacuum experiments. The invention is particularly applicable to the design of the conical heat sink of the head of the vacuum vessel in the high vacuum plume experiment. 【Background technique】 [0002] An important prerequisite for the study of the plume effect is to ensure the rapid adsorption of the gas in the plume experiment, so that the environmental vacuum can reach the specified index. Most of the high-altitude plume experiments are simulated by nitrogen gas, and the equipment used to absorb the gas in the plume experiment is mainly a cryogenic pump surrounding the inner surface of the vacuum container, that is, a helium plate (liquid helium heat sink). The United States and Germany, which were studied earlier in the world, both adopted this structural form. For example, the STG vacuum plume experimental system of DLR in Ge...

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Problems solved by technology

[0004] The heads of the vacuum vessels used in thermal vacuum experiments are all disc-shaped or ellipsoidal, and the heat sinks at the heads are all made of such figure 1 The plate structure shown (1 is the skeleton, 2 is the heat sink of the planar structure), such as the KM series of vacuum vessels used for thermal vacuum experiments, uses a plate structure heat sink at the head, and this heat sink structure cannot effectively utilize the heat sink. head room

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