A honeycomb panel embedded part suitable for loop heat pipe and matching process method

Abstract

A honeycomb panel embedded part and a matching molding process method suitable for a loop heat pipe, wherein the embedded part is in the shape of a cuboid, one side of which is provided with a U-shaped groove penetrating the embedded part, providing a passage for the loop heat pipe; the planes of the two shoulders of the groove each have a threaded hole, which is used to fix the embedded part to the outer panel of the honeycomb panel during the curing and molding of the honeycomb panel. The embedded part can realize the safe extraction of the loop heat pipe conduit from the honeycomb panel, providing a prerequisite for the layout of the loop heat pipe in the space as required, with good process feasibility, and adopts a positioning hole design to ensure its position accuracy in the honeycomb panel.

Description

Technical Field

[0001] The invention relates to the field of satellite cabin body wall composite material structure design and composite material processing technology, and in particular to a honeycomb plate embedded part suitable for a loop heat pipe and a matching process method. Background Art

[0002] With the in-depth development of my country's aerospace field, the new generation of satellites represented by high-orbit SAR satellites have put forward higher requirements for equipment power consumption and heat dissipation. The honeycomb sandwich wall panels of the satellite cabin have good specific strength characteristics and occupy an important position in the main structure of the spacecraft. The pre-embedded loop heat pipe in the honeycomb sandwich wall panel products can effectively improve the overall thermal control performance of the satellite. Since the loop heat pipe conduit needs to extend perpendicular to the honeycomb panel, and the honeycomb sandwich wall panel undergoes a high temperature and high pressure curing stage in the autoclave during the molding process. Therefore, in response to the heat dissipation needs of high heat consumption and high-power equipment, it is necessary to design an embedded part and cooperate with the corresponding molding process method to realize the safe extraction of the loop heat pipe from the honeycomb panel. Summary of the invention

[0003] In response to the demand for loop heat pipes to enter and exit the honeycomb panel, the present invention provides an embedded part and a matching molding process method, which can realize the safe extraction of the loop heat pipe conduit from the honeycomb panel, provide a premise for the layout of the loop heat pipe in space as required, have good process feasibility, and adopt a positioning hole design to ensure its position accuracy on the honeycomb panel.

[0004] The structure of the honeycomb panel embedded parts suitable for the loop heat pipe provided by the present disclosure is as follows Figure 1 As shown, the embedded part is in the shape of a cuboid, one side of which is provided with a U-shaped groove penetrating the embedded part, and the plane of the shoulder of the groove is provided with a threaded hole.

[0005] The embedded part with the threaded hole surface is taken as the front side, and the distance to the opposite surface is defined as the embedded part height. The height should be equivalent to the height of other embedded parts, heat pipe height, and honeycomb height in the honeycomb sandwich honeycomb panel. The embedded part height should not be less than 15mm; the length and width of the embedded part are preferably 25mm to 35mm. The groove width is the diameter of the loop heat pipe conduit + 2mm, and the depth of the U-shaped groove is 1 / 2 to 3 / 4 of the embedded part height and the depth is not less than 10mm. The thread of the threaded hole is preferably M4×0.7 with a depth of 10 to 15mm. The two threaded holes are arranged symmetrically in the center, and the spacing is the width of the middle U-shaped groove + (8 to 12)mm.

[0006] Preferably, the honeycomb panel embedded parts adapted to the loop heat pipe are machined from 2A12T4 aluminum bars.

[0007] The position of the honeycomb panel embedded part (1) adapted to the loop heat pipe in the honeycomb panel is as follows: Figure 2As shown, it is placed between the inner panel and the outer panel of the honeycomb panel, the outer panel (3) of the honeycomb panel covers the upper side of the embedded part with the threaded hole, and the corresponding size of the slot and through hole are opened at the position corresponding to the U-shaped groove and the threaded hole of the embedded part (1). The loop heat pipe (5) is placed between the outer panel (3) of the honeycomb panel and the inner panel (2) of the honeycomb panel, and the loop heat pipe conduit (4) extends from the inside of the honeycomb panel to the outside of the honeycomb panel through the U-shaped groove of the embedded part. The loop heat pipe (5) refers to the heat pipe as a whole, and the main part is an aluminum structure with an I-shaped cross-section; the loop heat pipe conduit (4) refers to a hollow bendable aluminum tube with a diameter of about 4 mm.

[0008] In conjunction with the structure of the embedded parts, when the honeycomb panel containing the loop heat pipe (5) is cured and formed, a process screw corresponding to the threaded hole on the honeycomb panel embedded part (1) adapted to the loop heat pipe is used to pass through the process panel and the honeycomb panel outer panel (3) to tighten the embedded part (1) to fix the three together. After the honeycomb panel is cured and formed, the screws are loosened to remove the process panel, and a polytetrafluoroethylene plastic rod with a diameter of 8 mm to 15 mm is preferably used to bend the loop heat pipe conduit (4) along the polytetrafluoroethylene plastic rod by 90 degrees, and finally the loop heat pipe conduit (4) extends out of the honeycomb panel from the U-shaped slot of the honeycomb panel outer panel (3).

[0009] Compared with the prior art, the present invention has the following beneficial effects: (1) the provided honeycomb panel embedded parts adapted to the loop heat pipe enable the loop heat pipe to enter and exit the honeycomb panel safely, and the heat pipe lead-out envelope space is small; (2) the provided honeycomb panel supporting molding process method containing the loop heat pipe has good process feasibility, high safety and reliability, and ensures the position accuracy of the heat pipe conduit while realizing the honeycomb panel molding; (3) the embedded parts are light in weight, simple in structure, and easy to process; (4) the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0011] Figure 1 The structure of the embedded parts of the honeycomb panel provided by the present invention;

[0012] Figure 2 The honeycomb panel embedded parts provided in the present disclosure are assembled in the honeycomb panel, wherein: 1—honeycomb panel embedded parts adapted to the loop heat pipe; 2—honeycomb panel inner panel; 3—honeycomb panel outer panel; 4—loop heat pipe conduit; 5—loop heat pipe. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0014] A loop heat pipe (5) is contained in a honeycomb wall panel of a certain type of high-orbit SAR satellite cabin, and its conduit needs to extend out from the edge of the outer panel (3) of the honeycomb panel. The height of the loop heat pipe (5) is 25 mm, and the diameter of the loop heat pipe conduit (4) is 4 mm.

[0015] According to the technical characteristics of the loop heat pipe, a honeycomb panel embedded part (1) suitable for the loop heat pipe is designed. Figure 1 As shown. The embedded part has a height of 25 mm, a length and a width of 25 mm, a U-shaped groove width of 6 mm, a depth of 15 mm, two threaded holes with a thread size of M4×0.7 and a depth of 12 mm, and the threaded holes are symmetrically distributed in the center with a hole spacing of 16 mm. The outer panel (3) of the honeycomb panel corresponds to the extended position of the loop heat pipe conduit (5), and has two through holes with a diameter of 4.5 mm corresponding to the M4 threaded hole and the U-shaped groove on the honeycomb panel embedded part (1) adapted to the loop heat pipe, and a 7 mm×26 mm slot.

[0016] During the assembly process of the honeycomb panel containing the loop heat pipe, Figure 2 As shown, after confirming the position of the loop heat pipe in the honeycomb panel, the loop heat pipe conduit (5) is extended out of the honeycomb panel through the U-shaped groove on the honeycomb panel embedded part (1) adapted to the loop heat pipe. Then, the honeycomb panel outer panel (3) and the process panel are covered, and the honeycomb panel embedded part (1) adapted to the loop heat pipe is tightened with M4×10 process screws through the process panel and the honeycomb panel outer panel (3) to fix the three together. After the honeycomb panel containing the loop heat pipe is cured by high temperature and high pressure in an autoclave, the M4×10 process screws are loosened and the process panel is removed. At this time, the various parts of the honeycomb panel containing the loop heat pipe have been glued and cured into an integral structure, and then a polytetrafluoroethylene plastic rod with a diameter of 10 mm is used to bend the loop heat pipe conduit (5) 90° along the arc of the polytetrafluoroethylene plastic rod toward the honeycomb panel outer panel (3), and finally the loop heat pipe conduit (5) is extended out of the honeycomb panel from the slot corresponding to the U-shaped groove of the embedded part on the honeycomb panel outer panel (3).

[0017] The above technical scheme is only an exemplary embodiment of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the application methods and principles disclosed in the present invention, and it is not limited to the method described in the above specific embodiment of the present invention. Therefore, the method described above is only preferred and does not have a restrictive meaning.

Claims

1. A honeycomb panel embedded part adapted for a loop heat pipe, characterized in that: The embedded part is in the shape of a cuboid, one side of which is provided with a U-shaped groove penetrating the embedded part, providing a passage for the loop heat pipe conduit; There is a threaded hole on the plane of the two shoulders of the groove, which is used to fix the embedded part to the outer panel of the honeycomb panel during the curing and molding process of the honeycomb panel; The embedded part is placed between the inner panel and the outer panel of the honeycomb panel in the honeycomb panel, the outer panel of the honeycomb panel covers the surface of the embedded part with the threaded hole, and a slot and a through hole of corresponding size are opened at the corresponding position of the U-shaped groove and the threaded hole of the embedded part; The distance from the surface of the embedded part with the threaded hole to the opposite surface is taken as the height of the embedded part, then: The height of the embedded parts should be equal to the height of other embedded parts, heat pipes and honeycombs in the honeycomb sandwich panel, and should not be less than 15mm; The length and width of the embedded parts are 25 to 35 mm; The width of the U-shaped groove is 2mm larger than the diameter of the loop heat pipe conduit, and the depth of the groove is 1 / 2 to 3 / 4 of the height of the embedded part and the depth is not less than 10mm; The threaded holes have a thread diameter of 4 mm, a thread pitch of 0.7 mm, and a depth of 10 to 15 mm; the two threaded holes are symmetrically arranged in the center, and the spacing is 8 to 12 mm larger than the width of the middle U-shaped groove.

2. The embedded part according to claim 1, characterized in that: The embedded parts are made of 2A12T4 aluminum bars.

3. A method for forming a honeycomb panel of a loop heat pipe using the embedded parts of claim 1, comprising the following steps: After determining the position of the loop heat pipe in the honeycomb panel, the loop heat pipe conduit is extended out of the honeycomb panel through the U-shaped groove on the embedded part; Cover the embedded parts with the honeycomb panel outer panel and the process panel, so that the slots and threaded holes on the honeycomb panel outer panel are aligned with the U-shaped grooves and threaded holes on the embedded parts, and fix the honeycomb panel outer panel and the embedded parts together with screws passing through the process panel; After the honeycomb panel is cured and formed, loosen the screws and remove the process panel; With the help of auxiliary tools, the loop heat pipe conduit is bent 90° in arc, and extends out of the honeycomb panel through the slot on the outer panel of the honeycomb panel corresponding to the U-shaped groove of the embedded part; The auxiliary tool comprises a polytetrafluoroplastic rod with a diameter of 8 mm to 15 mm, and the loop heat pipe conduit is bent 90 degrees along the arc of the polytetrafluoroplastic rod toward the outer panel side of the honeycomb panel.

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