Flat plate capillary pump assembly

Abstract

The invention relates to a flat plate capillary pump assembly based on a ceramic core. The flat plate capillary pump assembly comprises a liquid storage device shell, an evaporator bottom plate, a connecting rod, a main core and an auxiliary core, the main core is of a hollow annular cylindrical structure, the surface of one side of the main core is provided with an annular cylindrical coaxial boss, the boss is tightly attached to another boss in the liquid storage device shell, the connecting rod penetrates through the interior of the boss, the auxiliary core is of a hollow annular cylindrical structure, the auxiliary core is located in the liquid storage device, one side of the auxiliary core is tightly attached to the capillary core, and the other side of the auxiliary core is tightly attached to the inner surface of the top of the liquid storage device shell. According to the flat plate capillary pump assembly based on the ceramic core, the evaporator bottom plate and the liquid storage device bottom plate are connected through the connecting rod, and therefore the positive pressure resistance can be greatly improved, and it can be guaranteed that the deformation amount is smaller than 0.05 under the pressure of 4 Mpa; meanwhile, the connecting rod is of a threaded structure, the evaporator bottom plate and the main core can be tightly attached through screwing, and therefore heat conduction between the evaporator and the capillary core is increased; and meanwhile, the connecting rod is of a hollow structure, and therefore heat leakage of the evaporator to the liquid storage device can be reduced.

Description

technical field [0001] The invention relates to a flat capillary pump assembly based on a ceramic core, which belongs to the technical field of heat dissipation for spacecraft and other electronic equipment on the ground. Background technique [0002] Loop heat pipe (LHP) is a two-phase fluid circuit system that uses capillary force to drive the circulation of working fluid to complete heat exchange. It quickly transfers the heat from the heat source to the heat sink through a flexible pipeline. The required flexible heat transfer link, and the loop heat pipe has the advantages of small heat transfer temperature difference, large heat transfer power, long heat transfer distance, high temperature control accuracy and flexible installation. Based on this, the loop heat pipe has become an advanced precision thermal control product with broad development prospects in the spacecraft thermal control system. [0003] Such as figure 1 As shown, the loop heat pipe mainly includes a...

AI Technical Summary

Problems solved by technology

[0006] (1) Poor pressure resistance

Compared with the columnar structure, the flat structure has poor pressure resistance

When working fluids with high saturation pressure such as ammonia and freon are used, the plate structure is prone to deformation, resulting in greatly reduced heat transfer performance of the evaporator

[0007] (2) Backward heat leakage is large

[0008] (3) Unstable operation under microgravity conditions

In the microgravity environment of the flat plate capillary pump assembly, most of the liquid is randomly distributed in the liquid reservoir in the form of droplets, and the capillary core in the evaporator section may be partially dried up, which makes the flat plate loop heat pipe run the risk of failure

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