A short-wave radiation heating device

Abstract

The present application provides a short-wave radiation heating device, comprising: a heater housing with a radiation heating cavity inside and an inflation port communicating with the radiation heating cavity provided on the upper side; a lamp holder, which includes a left lamp holder and a right lamp holder, the conductive blocks of the left lamp holder and the right lamp holder extend into the radiation heating cavity inside the heater housing, the left lamp holder and the right lamp holder have electrodes, and the electrodes include two electrodes; an insulating seat sleeved outside the lamp holder for fixing the lamp holder to the heater housing; a plurality of filaments installed in the radiation heating cavity, and both ends of the filaments are respectively fixed on the corresponding conductive blocks of the left lamp holder and the right lamp holder; an optical window installed below the radiation heating cavity of the heater housing for forming a closed cavity with the radiation heating cavity; an insulating support rod arranged in the radiation heating cavity and fixedly connected with the conductive blocks of the left lamp holder and the right lamp holder at both ends; and a wire support for connecting the filament and the support rod to keep the filament fixed in the radiation heating cavity of the heater housing.

Description

Technical Field

[0001] This application belongs to the technical field of aerospace vehicle environmental test technology, and particularly relates to a short-wave radiation heating device. Background Art

[0002] Hypersonic vehicles have high maneuverability and long-range precision strike capabilities, and have become the main development direction of aerospace. The flight service environment of hypersonic vehicles is extremely harsh. The high-intensity noise generated by their propulsion systems / boundary layers can exceed 180 dB in local areas, and the heat flux of the aerodynamic heat load generated by the interaction of the boundary layer and local shock waves can exceed 1200 kW / m 2 , and the temperature of the large-area thermal protection structure can reach over 1000 °C, and the temperature in areas such as the nose cone and leading edge of the wing can be as high as 2000 °C.

[0003] In order to simulate the test environment of hypersonic vehicles, quartz lamps are usually used as heating elements for aerodynamic heating simulation tests in the prior art. However, quartz lamps are prone to petrification and softening of quartz glass when working in the above-mentioned harsh thermal environment, thus losing their heating ability. Although relatively high heating temperatures can be achieved by taking active cooling measures, in a multi-field coupling environment, especially in a thermal noise and thermal vibration noise coupling environment, the heating temperature of the quartz lamp heating device is limited by the use temperature of quartz glass and cannot meet the requirements of ground simulation tests. In another heating scheme, a graphite heating device is used for heating. Although the graphite heating device can obtain a higher heat flux and achieve a higher heating temperature, graphite has a large thermal inertia and poor controllability, making it difficult to simulate the thermal environment of the temperature curve. Summary of the Invention

[0004] The purpose of this application is to provide a short-wave radiation heating device to solve or alleviate at least one problem in the background art.

[0005] The technical solution of this application is: A short-wave radiation heating device, comprising:

[0006] A heater housing, an internal radiation heating cavity is formed inside the heater housing, and an inflation port communicating with the radiation heating cavity is provided on the upper side of the heater housing. A protective gas is filled into the radiation heating cavity through the inflation port to discharge the original air, thereby protecting the filament in the radiation heating cavity;

[0007] A lamp holder, the lamp holder includes a left lamp holder and a right lamp holder. Part of the structures of the left lamp holder and the right lamp holder penetrate through the heater housing and extend into the radiation heating cavity inside the heater housing. Among them, the extending part forms a conductive block, and the non-extending part forms an electrode, and the electrode includes two electrodes;

[0008] An insulating seat sleeved outside the lamp socket, which is used to fix the lamp socket to the heater housing;

[0009] A plurality of filaments, which are installed in the radiation heating cavity of the heater housing, and both ends of the filaments are respectively fixed on the corresponding conductive blocks of the left lamp socket and the right lamp socket along the width direction of the heater housing;

[0010] An optical window, which is installed below the radiation heating cavity of the heater housing, and the optical window and the radiation heating cavity form a closed cavity;

[0011] A support rod made of insulating material, which is arranged in the radiation heating cavity, and both ends are respectively fixedly connected to the conductive blocks of the left lamp socket and the right lamp socket;

[0012] A wire support connecting the filament and the support rod, through which the filament is fixed in the radiation heating cavity of the heater housing.

[0013] In a preferred embodiment of the present application, the protective gas is nitrogen.

[0014] In a preferred embodiment of the present application, a plurality of communicating cooling pipelines are arranged inside the heater housing, and the cooling pipelines are distributed on the upper wall and the side wall of the heater housing.

[0015] In a preferred embodiment of the present application, the electrode includes a first electrode and a second electrode, the interiors of the first electrode and the second electrode are hollow structures, a plurality of communicating cooling channels are arranged inside the conductive block, the first electrode and the second electrode are respectively communicated to both sides of the cooling channel of the conductive block, and a circulating cooling path is formed through the first electrode, the second electrode and the cooling channel for cooling the left lamp socket and the right lamp socket.

[0016] In a preferred embodiment of the present application, the insulating seat includes an inner sleeve and an outer sleeve, both the inner sleeve and the outer sleeve are arranged on the outer surface of the lamp socket, and the inner sleeve and the outer sleeve are respectively arranged on the inner and outer sides of the heater housing.

[0017] In a preferred embodiment of the present application, the inner sleeve and the outer sleeve are relatively fixed to the heater housing by means of threading or interference fit.

[0018] In a preferred embodiment of the present application, at least two rows of filaments are arranged in the height direction of the heater housing, and in the thickness direction of the heater housing, there are multiple filaments in each row.

[0019] In a preferred embodiment of the present application, in the height direction of the heater housing, the interval distance between two adjacent rows of filaments is 7 mm to 15 mm, and in the thickness direction of the heater housing, the axis interval between adjacent filaments in each row is 7 mm to 15 mm.

[0020] In a preferred embodiment of the present application, the optical window is cooperatively installed with the heater housing through a clamping groove provided on the heater housing.

[0021] In a preferred embodiment of the present application, a plurality of filament supports are provided in the width direction of the heater housing, and the filament supports for winding the upper-layer filaments on the support rods and the filament supports for winding the lower-layer filaments on the support rods are distributed at intervals. Among them, the relative positions of the filament supports wound on the filaments are the same, so that the wound filaments are in an equipotential state and no current passes through the filament supports.

[0022] The short-wave radiation heating device of the present application can greatly increase the output heat flux, obtain a heating temperature close to that of a graphite heating device, and can achieve a higher radiation heat flux output on a small-sized heater, solving the disadvantages of large thermal inertia and difficult control of a graphite heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions provided by the present application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application.

[0024] Figure 1 It is a schematic structural diagram of the short-wave radiation heating device of the present application.

[0025] Figure 2 For Figure 1 A - A cross-sectional view based on

[0026] Figure 3 For Figure 1 B - B cross-sectional view based on

[0027] Figure 4 It is a schematic diagram of the internal flow path of the lamp socket in the present application.

[0028] Figure 5 It is a schematic diagram of the internal flow path of the heater housing in the present application.

[0029] REFERENCE NUMERALS:

[0030] 1 - Heater housing

[0031] 11 - Radiation heating cavity

[0032] 12 - Gas filling port

[0033] 13 - Cooling pipeline

[0034] 2 - Lamp socket

[0035] 21 - Left lamp socket

[0036] 22 - Right lamp socket

[0037] 23 - Conductive block

[0038] 24 - Electrode

[0039] 241 - First Electrode

[0040] 242 - Second Electrode

[0041] 25 - Cooling Channel

[0042] 3 - Insulating Base

[0043] 31 - Inner Sleeve

[0044] 32 - Outer Sleeve

[0045] 4 - Filament

[0046] 5 - Optical Window

[0047] 6 - Support Rod

[0048] 7 - Filament Holder Detailed Implementation Manner

[0049] To make the purpose, technical solution and advantages of the implementation of this application clearer, the technical solution in the embodiments of this application will be described in more detail below with reference to the accompanying drawings in the embodiments of this application.

[0050] To provide a radiation heating device suitable for use in a hot noise and coupled thermal vibration noise test environment, with a higher heating temperature, good controllability, and small thermal inertia, this application provides a short - wave radiation heating device.

[0051] As Figures 1 to 5 shown, the short - wave radiation heating device provided by this application includes: a heater housing 1, a lamp holder 2, an insulating base 3, a filament 4, an optical window 5, a support rod 6, and a filament holder 7.

[0052] The heater housing 1 is generally a cuboid structure. An irradiation heating cavity 11 is formed inside the heater housing 1. An inflation port 12 is provided on the upper side of the heater housing 1, and the inflation port 12 communicates with the irradiation heating cavity 11. Through the inflation port 12, a protective gas can be filled into the irradiation heating cavity 11 to discharge the original air, so as to protect the filament 4 in the irradiation heating cavity 11. In some embodiments of this application, the above - mentioned protective gas can be nitrogen.

[0053] In a preferred embodiment of this application, a plurality of cooling pipelines 13 are provided inside the heater housing 1. The cooling pipelines 13 are distributed in the upper wall and side walls of the heater housing 1. By introducing a cooling medium (such as water) into the cooling pipelines 13, the heating housing 1 can be maintained at a lower temperature (not higher than 100 °C), thereby ensuring the normal operation of the heating device.

[0054] The lamp socket 2 includes a left lamp socket 21 and a right lamp socket 22. The left lamp socket 21 and the right lamp socket 22 are distributed on both sides of the heater housing 1. The left lamp socket 21 and the right lamp socket 22 have similar structures and are symmetrical to each other. In the following embodiments, the left lamp socket 21 of the present application is taken as an example for illustration.

[0055] A part of the left lamp socket 21 passes through the heater housing 1 and extends into the radiation heating cavity 11 inside the heater housing 1. The extending part forms a conductive block 23, and the non-extending part forms an electrode 24. Among them, as shown in Figure 2 As shown, the left lamp socket 21 includes two electrodes, namely a first electrode 241 and a second electrode 242. The first electrode 241 and the second electrode 242 are commonly connected to the conductive block 23. The electrode 24 of the lamp socket 2 is connected to a power source to supply electrical energy to the filament 4.

[0056] In a preferred embodiment of the present application, the interiors of the first electrode 241 and the second electrode 242 are of a hollow structure. A plurality of communicating cooling channels 25 are provided inside the conductive block 23. The first electrode 241 and the second electrode 242 on the left lamp socket 21 are respectively communicated to both sides of the cooling channel 25 of the conductive block 23. Cooling medium flows in through the first electrode 241 and flows out through the second electrode 242 (or cooling medium flows in through the second electrode 242 and flows out through the first electrode 241), thereby realizing a circulating cooling path for maintaining the normal operation of the left lamp socket 241 at a lower temperature (not higher than 100 °C).

[0057] The insulating seat 3 is arranged outside the lamp socket 2. The lamp socket 2 can be fixed to the heater housing 1 through the insulating seat 3. Among them, the insulating seat 3 includes an inner sleeve 31 and an outer sleeve 32. The cross-sections of the inner sleeve 31 and the outer sleeve 32 are of an L-shaped structure, and a hollow tubular structure is formed by rotating around its center line. The inner sleeve 31 and the outer sleeve 32 are arranged on the outer surface of the lamp socket 2, and the inner sleeve 31 and the outer sleeve 32 are respectively arranged on the inner and outer sides of the heater housing 1. The inner sleeve 31 and the outer sleeve 32 are relatively fixed to the heater housing 1 by means of threads or interference fits.

[0058] In some embodiments of the present application, the insulating seat 3 is made of a high-temperature resistant non-conductive material. For example, the insulating seat 3 can be made of high-temperature resistant insulating materials such as alumina and zirconia ceramics.

[0059] There are multiple filaments 4, which are installed in the radiation heating cavity 11 inside the heater housing 1. Both ends of the filaments 4 are respectively fixed on the corresponding conductive blocks 23 of the left lamp socket 21 and the right lamp socket 22 along the width direction W of the heater housing 1.

[0060] In the present application, the filament 4 has a spiral structure. It is provided with at least two rows in the height direction H of the heater housing 1 according to the size of the lamp socket 2. In the thickness direction T of the heater housing 1, there are multiple filaments 4 in each row. Exemplarily, 5 to 9 filaments 4 are arranged in each row, and the adjacent two rows of filaments 4 are staggered, so as to provide the filament 4 with as large a radiation area as possible, thereby increasing the radiation temperature.

[0061] In order to ensure that the filament 4 has the optimal radiation effect, in the height direction H, the spacing distance between the adjacent two rows of filaments 4 is 7 mm to 15 mm, and in the thickness direction T, the axis spacing between the adjacent filaments 4 in each row is 7 mm to 15 mm.

[0062] In a preferred embodiment of the present application, the filament 4 can be made of tungsten wire with a high melting point, or other high-temperature resistant materials such as carbon wire can also be selected.

[0063] The optical window 5 is made of a transparent material. It is installed below the radiation heating cavity 11 of the heater housing 1 and forms a closed cavity with the radiation heating cavity 11. The optical window 5 is used to maintain the gas protection environment of the radiation heating cavity 11 and allow the radiation heat flow emitted by the filament 4 to transmit through. In this embodiment of the present application, the optical window 5 is installed in cooperation with the heater housing 1 through a card slot provided on the heater housing 1.

[0064] In a preferred embodiment of the present application, the optical window 5 can be made of quartz glass with a high short-wave radiation transmittance, which can prevent the filament 4 from being oxidized and damaged while isolating the radiation heating cavity 11 from the outside air.

[0065] Furthermore, the distance between the inner surface of the optical window 5 in the vertical direction and the axis of the nearest filament 4 is 8 mm to 20 mm. The outer surface of the optical window 5 is placed in a thermal noise environment, and the convective cooling effect of the cold air flow in this environment can be used to reduce the temperature of the optical window 5.

[0066] The support rod 6 is made of an insulating material. It is arranged in the radiation heating cavity 11 of the heater housing 1. The two ends of the support rod 6 are respectively connected to the conductive blocks 23 of the left lamp socket 21 and the right lamp socket 22 and are fixed to the left lamp socket 21 and the right lamp socket 22. By connecting the wire support 7 to the filament 4 and winding it around the support rod 6, the support or bearing of the filament 4 can be realized.

[0067] In the present application, there are two support rods 6, and the two support rods 6 are respectively connected to the positions matching the first electrode 241 and the second electrode 242 in the left lamp socket 21 and the right lamp socket 22. As Figure 2 shown, the left support rod 6 is arranged on the conductive block below the first electrode 241, and the right support rod 6 is arranged on the same conductive block below the second electrode 242.

[0068] In a preferred embodiment of the present application, the support rod 6 is made of ceramic material.

[0069] The wire holder 7 connects the filament 4 and the support rod 6, and is used to connect the filament 4 and the support rod 6, so that the filament 4 is fixed in the radiation heating cavity 11 of the heater housing 1 and does not bend or hang significantly under the action of gravity.

[0070] In the present application, a plurality of wire holders 7 are provided in the width direction W of the heater housing 1, and they are spaced apart to wind the upper-layer filament 4 and the lower-layer filament 4 around the support rod 6. Among them, the relative positions of the wire holders 7 wound around the filament 4 are the same, so that the wound filaments 4 are in an equipotential state and no current passes through the wire holders 7.

[0071] In an embodiment of the present application, the interval of the wire holders 7 in the width direction W is set to 15 mm to 45 mm.

[0072] The short-wave radiation heating device provided by the present application no longer uses a quartz glass lamp tube with a large temperature limitation, but uses a filament as a heating element to work in a protective gas environment. The filament diameter is smaller than that of the quartz lamp tube, and it can achieve higher heat under the same area. In order to achieve a higher heating temperature, more filaments are arranged in a certain arrangement rule in the radiation heating cavity, and the filaments are fixed to the support rod through wire holders. When the heating device works, the cooling water circuit, the circuit, and the gas circuit are respectively connected to the water source, the power source, and the gas source, and the radiant heat flow of the filament is output through the optical window. By using the temperature measurement and control system to control the input voltage of the power source to adjust the output of the heating device, the thermal noise and thermal vibration noise tests can be carried out.

[0073] The short-wave radiation heating device of the present application can greatly increase the output heat flow, obtain a heating temperature close to that of a graphite heating device, and can achieve a higher radiant heat flow output on a small-sized heater, solving the disadvantages of large thermal inertia and difficult control of the graphite heating element.

[0074] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A short-wave radiation heating device, characterized in that, Including: A heater housing, inside which a radiation heating chamber is formed. An inflation port communicating with the radiation heating chamber is provided on the upper side of the heater housing. A protective gas is filled into the radiation heating chamber through the inflation port to discharge the original air, so as to protect the filament in the radiation heating chamber. A lamp socket, which includes a left lamp socket and a right lamp socket. Part of the structures of the left lamp socket and the right lamp socket pass through the heater housing and extend into the radiation heating chamber inside the heater housing. Among them, the extending part forms a conductive block, and the non-extending part forms an electrode. The electrode includes a first electrode and a second electrode. The interiors of the first electrode and the second electrode are hollow structures. A plurality of communicating cooling channels are provided inside the conductive block. The first electrode and the second electrode are respectively communicated with both sides of the cooling channel of the conductive block, and a circulating cooling path is formed through the first electrode, the second electrode and the cooling channel for cooling the left lamp socket and the right lamp socket. An insulating seat sleeved outside the lamp socket, which is used to fix the lamp socket to the heater housing. A plurality of filaments, which are installed in the radiation heating chamber of the heater housing. Both ends of the filaments are respectively fixed on the corresponding conductive blocks of the left lamp socket and the right lamp socket along the width direction of the heater housing. An optical window, which is installed below the radiation heating chamber of the heater housing. The optical window and the radiation heating chamber form a closed cavity. A support rod made of insulating material, which is arranged in the radiation heating chamber and is respectively fixedly connected to the conductive blocks of the left lamp socket and the right lamp socket at both ends. A wire support connecting the filament and the support rod. Through the wire support, the filament is kept fixed in the radiation heating chamber of the heater housing. Among them, a plurality of wire supports are provided in the width direction of the heater housing. The wire supports winding the upper-layer filaments on the support rod and the wire supports winding the lower-layer filaments on the support rod are distributed at intervals. The relative positions of the wire supports winding on the filaments are the same, so that the wound filaments are in an equipotential state and no current passes through the wire supports.

2. The short-wave radiation heating device according to claim 1, characterized in that, The protective gas is nitrogen.

3. The short-wave radiation heating device according to claim 1, characterized in that, A plurality of communicating cooling pipelines are provided inside the heater housing, and the cooling pipelines are distributed on the upper wall and the side wall of the heater housing.

4. The short-wave radiation heating device according to claim 1, characterized in that, The insulating seat includes an inner sleeve and an outer sleeve. Both the inner sleeve and the outer sleeve are arranged on the outer surface of the lamp socket, and the inner sleeve and the outer sleeve are respectively arranged on the inner and outer sides of the heater housing.

5. The short-wave radiation heating device according to claim 4, characterized in that, The inner sleeve and the outer sleeve are relatively fixed to the heater housing through threads.

6. The short-wave radiation heating device according to claim 4, characterized in that, The inner sleeve and the outer sleeve are relatively fixed to the heater housing by an interference fit method.

7. The short-wave radiation heating device according to claim 1, characterized in that, There are at least 2 rows of filaments in the height direction of the heater housing. In the thickness direction of the heater housing, there are multiple filaments in each row.

8. The short-wave radiation heating device according to claim 6, characterized in that, In the height direction of the heater housing, the interval distance between two adjacent rows of filaments is 7 mm to 15 mm. In the thickness direction of the heater housing, the axis interval between adjacent filaments in each row is 7 mm to 15 mm.

9. The short-wave radiation heating device according to claim 1, characterized in that, The optical window is cooperatively installed with the heater housing through a card slot provided on the heater housing.

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