CN113237677B - A vacuum environment simulation test equipment and test method for variable heat sink space - Google Patents

Abstract

The invention relates to vacuum environment simulation test equipment, in particular to vacuum environment simulation test equipment with a variable heat sink space and a test method. The invention aims to solve the technical problems of high liquid nitrogen consumption and high cost in the test process of the conventional vacuum environment simulation test equipment. The heat sink of the equipment comprises a gate heat sink, an end heat sink and a plurality of independent cylindrical heat sinks, wherein the gate heat sink, the end heat sink and the independent cylindrical heat sinks form a heat sink enclosure space; the gate heat sink is fixedly arranged on the gate; the cylindrical heat sinks are cylindrical heat sinks, and the cylindrical heat sinks are fixedly arranged on the inner wall of the cylinder body after being axially arranged along the vacuum container; a second guide rail is arranged in the upper area of the space enclosed by the cylindrical heat sink, the second guide rail is arranged on the inner wall of the cylinder body through a top hoisting rod, and the end heat sink is suspended and arranged on the second guide rail through a movable bracket; the movable support is provided with a track roller structure and a locking mechanism, and the nitrogen supply system is respectively connected with the gate heat sink, the end heat sink and the independent cylinder heat sinks.

Description

A vacuum environment simulation test equipment and test method for variable heat sink space

technical field

The invention relates to a vacuum environment simulation test device, in particular to a vacuum environment simulation test device and a test method for a variable heat sink space.

Background technique

According to the environmental test specifications for aerospace products, thermal vacuum tests are required for aerospace products from components, sub-systems to the whole satellite (the entire satellite) before launch to verify whether the performance indicators of aerospace products in various working modes in orbit meet the requirements. Therefore, under the specified test pressure and thermal cycle stress environment, potential quality defects that may be introduced in components, materials, processes and manufacturing links are exposed.

Vacuum environment simulation test equipment usually consists of vacuum container, heat sink, nitrogen supply system, infrared heat flow simulation device, measurement and control system and vacuum system. The vacuum container is the main body of the space environment simulation test equipment. There is a heat sink inside the vacuum container. The heat sink encloses the equipment guide rail and the cargo cart in the space. The cylinder of the vacuum container has various flange holes and vacuum system. The nitrogen supply system and the measurement and control system are connected in equal parts.

Before the test, the product to be tested is placed on the trolley in the vacuum container, and an infrared heat flow simulation device is installed on the periphery of the product to be tested on the trolley. During the test, the vacuum system was used to evacuate the inside of the vacuum container, and then liquid nitrogen was continuously fed into the heat sink through the nitrogen supply system, and the temperature of the product was controlled by the infrared heat flow simulation system.

Depending on the product level or the complexity of the test, the thermal vacuum test cycle generally takes several days to a dozen days, and the thermal vacuum test cycle at the sub-system and system level may be longer. During the test, liquid nitrogen was always injected into the equipment to maintain a low temperature background environment. The long-term consumption of liquid nitrogen is the largest cost in the thermal vacuum test. Therefore, it is necessary to carry out research on liquid nitrogen energy saving and emission reduction, in order to take effective measures to control the test cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the technical problems of large consumption of liquid nitrogen and high cost in the existing vacuum environment simulation test equipment during the test process, and to provide a vacuum environment simulation test equipment and test method with variable heat sink space.

For solving the above-mentioned technical problems, the technical solutions provided by the present invention are as follows:

A vacuum environment simulation test equipment with variable heat sink space, including a vacuum container, a heat sink, a nitrogen supply system, a cargo trolley and an infrared heat flow simulation device; The bottom of the space enclosed by the heat sink in the vacuum container is provided with a first guide rail, the cargo trolley is located on the first guide rail, and the infrared heat flow simulation device is installed on the outer periphery of the product to be tested on the cargo trolley. Its special features are:

The heat sink includes a door heat sink, an end heat sink and a plurality of independent cylindrical heat sinks, and the three enclose the heat sink to form a space;

The gate heat sink is fixedly installed on the gate;

The cylindrical heat sink is a cylindrical heat sink, and a plurality of cylindrical heat sinks are arranged along the axial direction of the vacuum container and then fixedly mounted on the inner wall of the cylindrical body;

A second guide rail is installed in the upper area of the space enclosed by the cylinder heat sink, and the second guide rail is installed on the inner wall of the cylinder body through a top hoisting rod, and the top hoisting rod passes through the gap between the adjacent cylinder heat sinks ;

The end heat sink is suspended and installed on the second guide rail through a movable bracket; the movable bracket is provided with a track roller structure and a locking mechanism for locking the movable bracket;

The nitrogen supply system is respectively connected with the gate heat sink, the end heat sink and a plurality of independent cylinder heat sinks.

Further, the nitrogen supply system includes a plurality of heat sink nitrogen inlet pipelines and a plurality of heat sink nitrogen outlet pipelines;

The inlet ends of the multiple heat sink nitrogen inlet pipelines are all connected with the nitrogen supply pipeline A outside the tank, and the outlet ends respectively pass through the gate or the cylinder wall, and are connected to the gate heat sink, the end heat sink or the multiple cylinder heat sinks. Nitrogen inlet connection;

The inlet ends of the nitrogen outlet pipes of the plurality of heat sinks respectively pass through the gate or the cylinder wall, and are connected with the door heat sink, the end heat sink or the nitrogen outlet of the plurality of cylinder heat sinks, and the nitrogen outlet pipes of the plurality of heat sinks are connected. The exit end B of the road leads to the atmosphere;

A nitrogen inlet valve V is provided on a plurality of the heat sink nitrogen inlet pipelines, and the nitrogen inlet valve V is located outside the vacuum container;

Among them, the heat sink nitrogen inlet pipeline and the heat sink nitrogen outlet pipeline connected to the end heat sink are made of flexible metal bellows;

The heat sink nitrogen inlet pipeline and heat sink nitrogen outlet pipeline connected to the gate heat sink are all flexible metal bellows or detachable metal pipelines.

Further, the sides of the door heat sink, the cylinder heat sink and the end heat sink facing the cargo trolley are all sprayed with aerospace black paint with high emissivity.

Further, an anti-radiation screen is installed on the surface of one side of the end heat sink away from the cargo trolley.

Further, there are 4 to 8 of the cylindrical heat sinks along the axial direction of the cylindrical body.

Further, the first guide rail and the second guide rail both include two guide rails that are parallel to each other, and both ends of each guide rail are provided with limit structures.

Further, in order to meet the load-bearing requirements in a low temperature environment, the first guide rail, the second guide rail, the cylinder and the moving bracket are all made of stainless steel.

The present invention also provides a vacuum environment simulation test method for a variable heat sink space, characterized in that the vacuum environment simulation test equipment for the variable heat sink space is adopted, comprising the following steps:

1) Install the product to be tested and the infrared heat flow simulation device on the cargo trolley;

2) Move the cargo trolley to the gate position of the vacuum environment simulation test equipment close to the variable heat sink space;

3) Move the heat sink at the end to the position close to the product to be tested and then lock it;

4) Evacuate the inside of the vacuum container;

5) Open the nitrogen inlet valve V, and the door heat sink, the end heat sink, and the effective cylindrical heat sink around the product to be tested are continuously fed with liquid nitrogen; the effective cylindrical heat sink refers to the surrounding of the heat sink. Cylinder heat sink into space;

6) Use an infrared heat flow simulation device to control the temperature of the product to be tested.

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

1. In the vacuum environment simulation test equipment and test method for variable heat sink space provided by the present invention, the end heat sink is designed as a movable structure, and the effective space of the heat sink is changed by moving the end heat sink. For unused heat sinks, liquid nitrogen is not introduced, which can save a lot of liquid nitrogen and achieve the purpose of reducing test costs and energy saving and emission reduction.

2. The vacuum environment simulation test equipment and test method for the variable heat sink space provided by the present invention, each heat sink has independent nitrogen inlet and outlet pipelines and nitrogen inlet valves V, and the nitrogen inlet valves V are designed outside the vacuum container, each The nitrogen inlet valve V can be independently adjusted according to the needs of the test, and the nitrogen amount of each cylinder heat sink is independently controlled by the nitrogen inlet valve V, which effectively reduces the amount of liquid nitrogen introduced.

3. The vacuum environment simulation test equipment and test method for the variable heat sink space provided by the present invention, the nitrogen inlet and outlet pipes of the end heat sink in the equipment use metal corrugated hoses, which can follow the movable end heat sink. move together.

4. The vacuum environment simulation test equipment and test method of the variable heat sink space provided by the present invention, the heat sink nitrogen inlet pipeline and the heat sink nitrogen outlet pipeline connected with the gate heat sink are made of flexible metal bellows or detachable Type metal piping to facilitate the operation of opening the door when the test is not carried out.

Description of drawings

Fig. 1 is the structure schematic diagram of the vacuum environment simulation test equipment of the variable heat sink space of the present invention;

Description of reference numbers:

1-Vacuum container, 101-Cylinder, 102-Gate, 2-Cargo cart, 3-First rail, 4-Gate heat sink, 5-End heat sink, 6-Cylinder heat sink, 7-Second Guide rail, 8-top lifting rod, 9-roller structure, 10-mobile bracket, 11-infrared heat flow simulation device, 12-product to be tested.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

A vacuum environment simulation test equipment with variable heat sink space, as shown in Figure 1, includes a vacuum container 1, a heat sink, a nitrogen supply system, a cargo trolley 2 and an infrared heat flow simulation device 11; the vacuum container 1 includes one end The open cylinder 101 and the gate 102 installed on the open end of the cylinder 101; the bottom of the space enclosed by the heat sink in the vacuum container 1 is provided with a first guide rail 3, the cargo trolley 2 is located on the first guide rail 3, and the infrared heat flow simulation device 11 is installed The heat sink is divided into a gate heat sink 4, an end heat sink 5 and a plurality of independent cylindrical heat sinks 6, and the three parts enclose the heat sink. The said gate heat sink 4 is fixedly installed on the said gate 102; The cylindrical heat sink 6 is a cylindrical heat sink, and a plurality of cylindrical heat sinks 6 are arranged along the axial direction of the vacuum container 1 ( After splicing), it is fixedly installed on the inner wall of the cylinder body 101, and the cylindrical heat sinks 6 are preferably 4 to 8; 7. Installed (rigidly connected) on the inner wall of the cylinder 101 through the top hoisting rod 8, and the top hoisting rod 8 passes through the gap between the adjacent cylinder heat sinks 6; the end heat sink 5 is moved by the bracket 10 is suspended and installed on the second guide rail 7, and when the end heat sink 5 moves to the farthest position on the second guide rail 7 from the gate 102, the equipment can reach the maximum usable space; the mobile support 10 is provided with a track roller structure 9 and the locking mechanism, the locking mechanism can adopt the existing conventional locking mechanism to lock the moving bracket 10 on the second guide rail 7, mainly to prevent the movement of the end heat sink 5 during the test; Between the sink 5 and the second guide rail 7, a heat insulating member made of PTFE is arranged; the nitrogen supply system is respectively connected with the gate heat sink 4, the end heat sink 5 and a plurality of independent cylindrical heat sinks 6. The sides of the door heat sink 4 , the cylinder heat sink 6 and the end heat sink 5 facing the cargo trolley 2 are all sprayed with aerospace black paint with high emissivity. A radiation shield is installed on a surface of the end heat sink 5 away from the cargo trolley 2 . The first guide rail 3 and the second guide rail 7 both include two guide rails that are parallel to each other, and limit structures are provided at both ends of each guide rail. The limit structures can adopt existing conventional limit structures, such as limit blocks. Equipment design needs to consider the low temperature extreme environment and load-bearing requirements in the equipment, so the first guide rail 3, the second guide rail 7 and the moving bracket 10 are all made of stainless steel, and the cylinder 101 is welded from stainless steel.

The nitrogen supply system includes a plurality of heat sink nitrogen inlet pipes and a plurality of heat sink nitrogen outlet pipes; the inlet ends of the plurality of heat sink nitrogen inlet pipes are connected to the nitrogen supply pipe A outside the tank, and the plurality of heat sink inlet pipes are connected to the nitrogen supply pipe A outside the tank. The outlet ends of the nitrogen pipelines respectively pass through the gate 102 or the cylinder wall, and are connected with the gate heat sink 4, the end heat sink 5 or the nitrogen inlets of the plurality of cylinder heat sinks 6; multiple heat sink nitrogen outlet pipelines The inlet end respectively passes through the gate 102 or the cylinder wall, and is connected with the gate heat sink 4, the end heat sink 5 or the nitrogen outlet of the plurality of cylinder heat sinks 6, and the outlet ends of the nitrogen outlet pipes of the multiple heat sinks are connected. B leads to the atmosphere; among them, the heat sink nitrogen inlet pipeline and the heat sink nitrogen outlet pipeline connected with the end heat sink 5 are made of flexible metal bellows; the heat sink nitrogen inlet pipeline connected with the door heat sink 4 and The heat sink nitrogen outlet pipeline adopts flexible metal bellows or detachable metal pipeline. A nitrogen inlet valve V is provided on the nitrogen inlet pipelines of the heat sinks. The nitrogen inlet valve V is located outside the vacuum container 1, and each nitrogen inlet valve V can be independently adjusted according to the usage conditions.

Each heat sink of the above-mentioned variable heat sink space vacuum environment simulation test equipment has independent inlet and outlet nitrogen pipelines and nitrogen inlet valve V, and the nitrogen inlet valve V is designed outside the equipment. The cylinder heat sink 6 can independently control the nitrogen amount of each cylinder heat sink 6 through the nitrogen inlet valve V according to the needs of the test. The end heat sink 5 is designed as a movable structure, and the effective space of the heat sink is changed by moving the end heat sink 5 . Metal corrugated hoses are used for the nitrogen inlet and outlet pipelines of the end heat sink 5 in the equipment.

Example

The vacuum environment simulation test equipment for the above-mentioned variable heat sink space has four cylindrical heat sinks 6, which are respectively cylindrical heat sink a, cylindrical heat sink b, cylindrical heat sink c, and cylindrical heat sink d;

There are six nitrogen inlet valves V, V1~V6, which are respectively set at the door heat sink 4, the cylinder heat sink a, the cylinder heat sink b, the cylinder heat sink c, the cylinder heat sink d and the end heat sink 5 the heat sink into the nitrogen pipeline;

The vacuum environment simulation test method for the variable heat sink space corresponding to the above-mentioned variable heat sink space vacuum environment simulation test equipment includes the following steps:

1) Install the product to be tested 12 and the infrared heat flow simulation device 11 on the cargo trolley 2;

2) Move the cargo trolley 2 to the position of the gate 102 of the vacuum environment simulation test equipment close to the variable heat sink space;

3) Move the end heat sink 5 to the position between the cylindrical heat sink b and the cylindrical heat sink c of the product to be tested 12, and then lock it to reduce the heat sink space. At this time, the effective space of the heat sink is the door heat. The space enclosed by the sink 4, the end heat sink 5, the cylinder heat sink a and the cylinder heat sink b;

4) vacuumize the vacuum container 1;

5) Pass liquid nitrogen to the door heat sink 4, end heat sink 5, cylinder heat sink a, and cylinder heat sink b respectively, open the nitrogen inlet valves V1, V2, V3 and V6, and pass the liquid into the effective space of the heat sink Nitrogen; keep the nitrogen inlet valves V4 and V5 closed, and the cylinder heat sink c and the cylinder heat sink d do not pass liquid nitrogen, which effectively reduces the flow of liquid nitrogen, which can save a lot of liquid nitrogen, and achieve energy saving, emission reduction and reduction. the purpose of the trial cost;

6) Use the infrared heat flow simulation device 11 to control the temperature of the product to be tested 12 .

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. For those of ordinary skill in the art, the specific technical solutions recorded in the foregoing embodiments can be modified. , or equivalently replace some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims (8)

1. A vacuum environment simulation test equipment for a variable heat sink space, comprising a vacuum container (1), a heat sink, a nitrogen supply system, a cargo trolley (2) and an infrared heat flow simulation device (11); the vacuum container (1) 1) It comprises a cylinder body (101) with one end open, and a gate (102) installed at the open end of the cylinder body (101); a first guide rail (3) is provided at the bottom of the space enclosed by the heat sink in the vacuum container (1), and the cargo trolley (2) On the first guide rail (3), the infrared heat flow simulation device (11) is installed on the outer periphery of the product to be tested (12) on the cargo trolley (2), and is characterized in that: The heat sink includes a door heat sink (4), an end heat sink (5) and a plurality of independent cylindrical heat sinks (6), and the three enclose the heat sink to form a space; The gate heat sink (4) is fixedly mounted on the gate (102); The cylindrical heat sink (6) is a cylindrical heat sink, and a plurality of cylindrical heat sinks (6) are arranged along the axial direction of the vacuum container (1) and then fixedly mounted on the inner wall of the cylindrical body (101); A second guide rail (7) is installed in the upper area of the space enclosed by the cylindrical heat sink (6), and the second guide rail (7) is installed on the inner wall of the cylindrical body (101) through a top hoisting rod (8). , the top hoisting rod (8) passes through the gap between the adjacent cylindrical heat sinks (6); The end heat sink (5) is suspended and mounted on the second guide rail (7) through a movable bracket (10); the movable bracket (10) is provided with a track roller structure (9) and is used for locking the movable bracket (10) the locking mechanism; The nitrogen supply system is respectively connected with the gate heat sink (4), the end heat sink (5) and a plurality of independent cylindrical heat sinks (6). 2. The vacuum environment simulation test equipment of variable heat sink space according to claim 1, is characterized in that: The nitrogen supply system includes a plurality of heat sink nitrogen inlet pipelines and a plurality of heat sink nitrogen outlet pipelines; The inlet ends of the nitrogen inlet pipelines of the plurality of heat sinks are all connected with the nitrogen supply pipeline A outside the tank, and the outlet ends respectively pass through the gate (102) or the cylinder wall, and are connected to the gate heat sink (4) and the end heat sink (5). ) or the nitrogen inlet connections of multiple cylindrical heat sinks (6); The inlet ends of the nitrogen outlet pipes of the plurality of heat sinks respectively pass through the gate (102) or the cylinder wall, and are connected with the gate heat sink (4), the end heat sink (5) or the plurality of cylinder heat sinks (6). The nitrogen outlet is connected, and the outlet ends B of the nitrogen outlet pipes of the multiple heat sinks lead to the atmosphere; A nitrogen inlet valve V is provided on a plurality of the nitrogen inlet pipelines of the heat sink, and the nitrogen inlet valve V is located outside the vacuum container (1); Wherein, the heat sink nitrogen inlet pipeline and the heat sink nitrogen outlet pipeline connected to the end heat sink (5) are made of flexible metal bellows; The heat sink nitrogen inlet pipeline and the heat sink nitrogen outlet pipeline connected to the gate heat sink (4) are all made of flexible metal corrugated pipes or detachable metal pipelines. 3. The vacuum environment simulation test equipment of variable heat sink space according to claim 2, is characterized in that: The sides of the door heat sink (4), the cylindrical heat sink (6) and the end heat sink (5) facing the cargo trolley (2) are all sprayed with aerospace black paint with high emissivity. 4. the vacuum environment simulation test equipment of variable heat sink space according to claim 1 or 2 or 3, is characterized in that: A radiation protection screen is installed on the surface of one side of the end heat sink (5) away from the cargo trolley (2). 5. The vacuum environment simulation test equipment of variable heat sink space according to claim 4, is characterized in that: There are 4 to 8 of the cylindrical heat sinks (6) along the axial direction of the cylindrical body (101). 6. The vacuum environment simulation test equipment of variable heat sink space according to claim 5, is characterized in that: The first guide rail (3) and the second guide rail (7) both include two guide rails that are parallel to each other, and both ends of each guide rail are provided with limit structures. 7. The vacuum environment simulation test equipment of variable heat sink space according to claim 6, is characterized in that: The first guide rail (3), the second guide rail (7), the cylinder body (101) and the moving bracket (10) are all made of stainless steel. 8. A vacuum environment simulation test method for a variable heat sink space, characterized in that: adopting the vacuum environment simulation test equipment of the variable heat sink space described in any one of claims 1 to 7, comprising the following steps: 1) Install the product to be tested (12) and the infrared heat flow simulation device (11) on the cargo trolley (2); 2) Move the cargo trolley (2) to the position of the gate (102) of the vacuum environment simulation test equipment close to the variable heat sink space; 3) Move the end heat sink (5) to the position close to the product to be tested (12) and then lock it; 4) Evacuate the inside of the vacuum container (1); 5) Open the nitrogen inlet valve V, and the door heat sink (4), the end heat sink (5), and the effective cylinder heat sink (6) around the product to be tested (12) are continuously fed with liquid nitrogen; The cylindrical heat sink (6) refers to the cylindrical heat sink (6) enclosing the space enclosed by the heat sink; 6) Use the infrared heat flow simulation device (11) to control the temperature of the product to be tested (12).

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