Single-machine structure design method and system capable of providing various internal thermal environments

Abstract

The invention provides a single machine structure design method and system capable of providing various internal thermal environments, and the method comprises the steps: S1, classifying all components contained in a single machine according to the working temperature, and classifying the components with the approximate working temperature into the same class; for each class, counting the highest working temperature of the component and the total heat consumption of the component; s2, according to the maximum working temperature and the total heat consumption of each class, the size of a heat dissipation surface needed by each class is calculated, and the height of the split type single machine frame corresponding to each class is further calculated; and S3, the split type single-machine frames are designed according to the heights of the split type single-machine frames corresponding to each type, heat insulation pads are arranged between the split type single-machine frames in a cushioned mode, and multiple layers of heat insulation assemblies are laid on the interfaces of the split type single-machine frames. Heat transfer of the single machine frame can be isolated, so that different split type frames of the same single machine can be at different temperatures.

Description

Technical Field

[0001] The present invention relates to the field of spacecraft thermal control, and specifically, to a single-unit structure design method and system capable of providing multiple internal thermal environments. Background Art

[0002] A single unit of a spacecraft refers to a device with a specific function and a large number of components integrated inside, such as a storage battery for storing and releasing electric energy, a power converter for voltage conversion, and so on. Generally, the operating temperature ranges of the components inside the same single unit are relatively close, such as -15°C to +45°C. The conventional single-unit structure design method is to build a hexahedron metal frame. Due to the good thermal conductivity of the metal, the inside of the single unit will be in the same thermal environment. Therefore, the components integrated inside the single unit will be in the same thermal environment.

[0003] With the continuous development of new technologies, some components with large differences in operating temperatures need to be integrated inside the same single unit. However, according to the conventional single-unit structure design method, the thermal environment inside the same single unit is consistent, which results in the inability of the conventional single-unit structure design method to take into account the operating temperature requirements of all electronic components. In view of this contradiction, there is an urgent need to propose a single-unit structure design scheme capable of providing multiple internal thermal environments. Summary of the Invention

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a single-unit structure design method and system capable of providing multiple internal thermal environments.

[0005] According to a single-unit structure design method capable of providing multiple internal thermal environments provided by the present invention, it includes:

[0006] Step S1: For each component included inside the single unit, classify them according to the operating temperature, and group the components with close operating temperatures into the same category; for each category, count the highest operating temperature of the components belonging to it and the total heat dissipation of the components belonging to it;

[0007] Step S2: According to the highest operating temperature and the total heat dissipation of each category, calculate the size of the heat dissipation surface required for each category respectively, and further calculate the height of the split single-unit frame corresponding to each category;

[0008] Step S3: Design a split single-unit frame according to the height of the split single-unit frame corresponding to each category, install heat insulation pads between the split single-unit frames, and lay multiple heat insulation components at the interface of the split single-unit frames.

[0009] Further, in the step S1, the difference between the highest operating temperatures of the components in the same category is less than or equal to 20°C.

[0010] Further, in the step S3, when designing the split single-machine frame, it also includes setting a single-machine top plate and a single-machine bottom plate on the split single-machine frame, and the single-machine top plate and the single-machine bottom plate are fixed to the split single-machine frame by screws;

[0011] The split single-machine frame, the single-machine top plate, and the single-machine bottom plate are made of magnesium alloy MB15 material, and the screws are made of titanium alloy TC4 material.

[0012] Further, the heat insulation pad is made of fiberglass material with a thickness of not less than 3 mm.

[0013] Further, the heat insulation component is composed from the inside to the outside of: 1 layer of 25-μm-thick polyimide film, 15 layers of heat insulation layers, and 1 layer of 16-μm-thick double-sided aluminized polyester film;

[0014] Among them, each layer of the heat insulation layer is composed of 1 layer of polyester mesh cloth T-20 and 1 layer of 6-μm-thick double-sided aluminized polyester film compounded.

[0015] According to a single-machine structure design system capable of providing multiple internal thermal environments provided by the present invention, it includes:

[0016] Module M1: For each component included in the single machine, classify them according to the working temperature, and classify the components with close working temperatures into the same category; for each category, count the highest working temperature of the components belonging to it and the total heat dissipation of the components belonging to it;

[0017] Module M2: According to the highest working temperature and the total heat dissipation of each category, calculate the size of the heat dissipation surface required for each category respectively, and further calculate the height of the split single-machine frame corresponding to each category;

[0018] Module M3: Design the split single-machine frame according to the height of the split single-machine frame corresponding to each category, install heat insulation pads between the split single-machine frames, and lay multiple layers of heat insulation components at the interface of the split single-machine frames.

[0019] Further, in the module M1, the maximum working temperature difference of the components in the same category is less than or equal to 20 °C.

[0020] Further, in the module M3, when designing the split single-machine frame, it also includes setting a single-machine top plate and a single-machine bottom plate on the split single-machine frame, and the single-machine top plate and the single-machine bottom plate are fixed to the split single-machine frame by screws;

[0021] The split single-machine frame, the single-machine top plate, and the single-machine bottom plate are made of magnesium alloy MB15 material, and the screws are made of titanium alloy TC4 material.

[0022] Further, the heat insulation pad is made of fiberglass material with a thickness of not less than 3 mm.

[0023] Further, the heat insulation component is composed from the inside to the outside of: 1 layer of 25-μm-thick polyimide film, 15 layers of heat insulation layers, and 1 layer of 16-μm-thick aluminized polyester film on both sides;

[0024] Wherein, each heat insulation layer is composed of the composite of 1 layer of polyester mesh T-20 and 1 layer of 6-μm-thick aluminized polyester film on both sides.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention insulates the heat transfer of the single-machine frame itself by padding heat insulation pads and laying multiple layers of heat insulation components, so that different split frames of the same single machine can be at different temperatures, thereby creating different thermal environments inside the single machine and being able to meet the requirements of different operating temperatures of the components inside the single machine. Description of the Drawings

[0027] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0028] Figure 1 It is a flowchart of the single-machine structure design method of the embodiment of the present invention;

[0029] Figure 2 、 Figure 3 It is a schematic diagram of the single-machine structure design of the present invention applied to a certain satellite;

[0030] Figure 4 It is the temperature condition of different components inside the single machine during the experiment after the present invention is applied to a certain satellite. Specific Embodiments

[0031] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0032] In this embodiment, there are several electronic components and several optical components inside a single unit of a certain spacecraft. The working temperature range of the electronic components is relatively wide, while the temperature of the optical components during ground debugging is 20°C. The deformation of the optical components is very sensitive to temperature. When the temperature deviates too much from the debugging temperature of 20°C, the deformation of the components will cause the deviation of the optical path, which will seriously affect the performance. Therefore, the working temperature range of the optical components is narrow. If the conventional single-unit structure design method is adopted, the heat generated during the operation of the electronic components will cause the temperature of the internal thermal environment of the single unit to rise, which will further cause the temperature of the optical components to exceed their working temperature range, and the single unit cannot work properly. Therefore, the method provided by the present invention is used for re-designing it.

[0033] As Figure 1 shown, a single-unit structure design method capable of providing multiple internal thermal environments provided by the present invention is as follows:

[0034] Step S1: For each component included inside the single unit, classify them according to the working temperature, and classify the components with close working temperatures into the same category; for each category, count the highest working temperature of the components belonging to it and the total heat dissipation of the components belonging to it.

[0035] The working temperature range of the electronic components is -15°C to +55°C, which is classified into the first category. The working temperature range of the optical components is +17°C to +23°C, which can be classified into the second category. The maximum working temperature difference of the components in the same category is less than or equal to 20°C. The total heat dissipation of the components in the first category is 45W, and the total heat dissipation of the components in the second category is 6W.

[0036] Step S2: According to the highest working temperature and total heat dissipation of each category, calculate the size of the heat dissipation surface required for each category respectively, and further calculate the height of the split single-unit frame corresponding to each category.

[0037] In this embodiment, the highest working temperature of the components in the first category is 55°C, the highest working temperature of the components in the second category is 23°C, the total heat dissipation of the components in the first category is 45W, and the total heat dissipation of the components in the second category is 6W. The single unit is located outside the cabin and not exposed to sunlight, and the environmental temperature T h can be taken as 4K. The surface of the single unit is sprayed with thermal control black paint, and the infrared emissivity ε is taken as 0.88. σ is the Stefan-Boltzmann constant, and generally σ = 5.67×10 -8 W / (m 2 ·K 4 ), so the calculation formulas for the heat dissipation areas required for the two categories of components are as follows:

[0038]

[0039] The calculated value of S 1 is 0.07792 m 2 , and S 2 is 0.015665 m 2 .

[0040] For a single unit with a length L of 0.4 m and a width W of 0.3 m, the height calculation formula for the split single-unit frames corresponding to the two types of components is as follows:

[0041]

[0042] The calculated Figure 1 height H of the first split single-unit frame 101 in 1 is 0.324 m, and the height H of the second split single-unit frame 102 2 is 0.065 m.

[0043] Step S3: Design the split single-unit frames according to the heights of the split single-unit frames corresponding to each type. Install heat insulation pads 105 between the split single-unit frames, and lay multiple layers of heat insulation components 106 at the interface of the split single-unit frames. When designing the split single-unit frames, it also includes setting a single-unit top plate 103 and a single-unit bottom plate 104 on the split single-unit frames. The single-unit top plate 103 and the single-unit bottom plate 104 are fixed to the split single-unit frames by screws. The final single-unit structure design refers to Figure 2 , Figure 3 as shown.

[0044] The split single-unit frames, the single-unit top plate, and the single-unit bottom plate are made of magnesium alloy MB15 material, which has the advantages of high thermal conductivity and low mass density at the same time. The heat insulation pads installed between the split frames are made of fiberglass material with a thickness of not less than 3 mm. This material has an extremely low thermal conductivity and can effectively isolate the heat conduction between the split frames. The screws are made of titanium alloy TC4 material, which has a relatively low thermal conductivity and can effectively isolate the heat conduction between the split frames.

[0045] The multiple layers of heat insulation components can effectively isolate the radiative heat transfer between the split frames. The multiple layers of heat insulation components are composed of 1 layer of 25-μm-thick polyimide film, 15 layers of heat insulation layers, and 1 layer of 16-μm-thick double-sided aluminized polyester film from the inside to the outside. Among them, each heat insulation layer is composed of 1 layer of polyester mesh cloth T-20 and 1 layer of 6-μm-thick double-sided aluminized polyester film compounded together.

[0046] After applying the present invention, the temperature of the electronic components inside the single unit is between 41.5 °C and 43.5 °C, and the temperature of the optical components is between 21 °C and 24 °C, both meeting the temperature index requirements. The temperature situation of the single unit during the experiment refers to Figure 4 as shown.

[0047] The present invention also provides a single-machine structure design system capable of providing multiple internal thermal environments. The single-machine structure design system capable of providing multiple internal thermal environments can be implemented by executing the process steps of the single-machine structure design method capable of providing multiple internal thermal environments. That is, those skilled in the art can understand the single-machine structure design method capable of providing multiple internal thermal environments as a preferred implementation manner of the single-machine structure design system capable of providing multiple internal thermal environments.

[0048] A single-machine structure design system capable of providing multiple internal thermal environments according to the present invention includes:

[0049] Module M1: Classify each component included in the single machine according to the operating temperature, and group the components with close operating temperatures into the same category; for each category, count the highest operating temperature of the components belonging to it and the total heat dissipation of the components belonging to it.

[0050] Module M2: Calculate the size of the heat dissipation surface required for each category respectively according to the highest operating temperature and the total heat dissipation of each category, and further calculate the height of the split single-machine frame corresponding to each category.

[0051] Module M3: Design the split single-machine frame according to the height of the split single-machine frame corresponding to each category, install heat insulation pads between the split single-machine frames, and lay multiple layers of heat insulation components at the interface of the split single-machine frames.

[0052] Those skilled in the art know that in addition to implementing the system and its various devices, modules, and units provided by the present invention in the form of pure computer-readable program code, the method steps can be logically programmed to enable the system and its various devices, modules, and units provided by the present invention to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers, etc. to achieve the same functions. Therefore, the system and its various devices, modules, and units provided by the present invention can be regarded as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be regarded as the structure within the hardware component; the devices, modules, and units for implementing various functions can also be regarded as either software modules for implementing the method or the structure within the hardware component.

[0053] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

Claims

1. A single machine structure design method that can provide multiple internal thermal environments, characterized in that: include: Step S1: Classify the components contained in the single machine according to the operating temperature, and classify the components with similar operating temperatures into the same category; For each category, the maximum operating temperature of the components and the total heat dissipation of the components are counted; Step S2: Calculate the required heat dissipation surface size of each category according to the maximum operating temperature and total heat consumption of each category, and further calculate the height of the split stand-alone frame corresponding to each category; Step S3: designing the split stand-alone frames according to the height of each type of split stand-alone frames corresponding to the split stand-alone frames, installing heat insulation pads between the split stand-alone frames, and laying multiple layers of heat insulation components on the interfaces of the split stand-alone frames.

2. The method for designing a single machine structure capable of providing multiple internal thermal environments according to claim 1, characterized in that: In step S1, the maximum operating temperature difference of components of the same type is less than or equal to 20°C.

3. The single-machine structure design method capable of providing multiple internal thermal environments according to claim 1, characterized in that: In the step S3, designing the split stand-alone frame also includes setting a stand-alone top plate and a stand-alone bottom plate on the split stand-alone frame, wherein the stand-alone top plate and the stand-alone bottom plate are fixed to the split stand-alone frame by screws; The split single-machine frame, the single-machine top plate, and the single-machine bottom plate are made of magnesium alloy MB15 material, and the screws are made of titanium alloy TC4 material.

4. The method for designing a single machine structure capable of providing multiple internal thermal environments according to claim 1, characterized in that: The thermal insulation pad is made of glass fiber reinforced plastic material and has a thickness of not less than 3 mm.

5. The method for designing a single machine structure capable of providing multiple internal thermal environments according to claim 1, characterized in that: The heat insulation component is composed of: 1 layer of 25 μm thick polyimide film, 15 layers of heat insulation layer, and 1 layer of 16 μm thick double-sided aluminum-plated polyester film from the inside to the outside; Each thermal insulation layer is composed of a layer of polyester mesh T-20 and a layer of 6μm thick double-sided aluminum-plated polyester film.

6. A single machine structure design system that can provide multiple internal thermal environments, characterized in that: include: Module M1: Classify the components contained in a single machine according to their operating temperatures, and put components with similar operating temperatures into the same category; For each category, the maximum operating temperature of the components and the total heat dissipation of the components are counted; Module M2: Calculate the required heat dissipation surface size for each category based on the maximum operating temperature and total heat consumption of each category, and further calculate the height of the split stand-alone frame corresponding to each category; Module M3: The split stand-alone frames are designed according to the height of each type of split stand-alone frame corresponding to the split stand-alone frame, thermal insulation pads are installed between each split stand-alone frame, and multi-layer thermal insulation components are laid on the interface of the split stand-alone frame.

7. The single-machine structure design system capable of providing multiple internal thermal environments according to claim 6, characterized in that: In the module M1, the maximum operating temperature difference of components of the same type is less than or equal to 20°C.

8. The single-machine structure design system capable of providing multiple internal thermal environments according to claim 6, characterized in that: In the module M3, when designing the split stand-alone frame, the design also includes setting a stand-alone top plate and a stand-alone bottom plate on the split stand-alone frame, and the stand-alone top plate and the stand-alone bottom plate are fixed to the split stand-alone frame by screws; The split single-machine frame, the single-machine top plate, and the single-machine bottom plate are made of magnesium alloy MB15 material, and the screws are made of titanium alloy TC4 material.

9. The single-machine structure design system capable of providing multiple internal thermal environments according to claim 6, characterized in that: The thermal insulation pad is made of glass fiber reinforced plastic material and has a thickness of not less than 3 mm.

10. The single-machine structure design system capable of providing multiple internal thermal environments according to claim 6, characterized in that: The heat insulation component is composed of: 1 layer of 25 μm thick polyimide film, 15 layers of heat insulation layer, and 1 layer of 16 μm thick double-sided aluminum-plated polyester film from the inside to the outside; Each thermal insulation layer is composed of a layer of polyester mesh T-20 and a layer of 6μm thick double-sided aluminum-plated polyester film.

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