Thermal protection device and control method for a reentry vehicle

Abstract

The application provides a heat protection device and a control method of a reentry vehicle, wherein the device comprises a gas cylinder, an adjusting valve, a variable-angle module and a controller, one end of the adjusting valve is connected with an outlet of the gas cylinder, the variable-angle module comprises a hose and a transmission mechanism, one end of the hose is connected with one end of the adjusting valve away from the gas cylinder, one end of the transmission mechanism is connected with the hose, and the other end of the transmission mechanism is connected with the adjusting valve, and the controller is connected with the adjusting valve and the transmission mechanism respectively. The output flow of the adjusting valve is adjusted through the transmission mechanism, the jet flow can be more accurate for the change of complex flight conditions, the reentry vehicle has stronger adaptability in the whole flight process, and the jet flow can be saved; the jet flow angle of the hose is adjusted through the transmission mechanism, the jet flow can be perpendicular to the airflow under multiple attack angles, and the jet flow is efficiently utilized; the adjusting of the jet flow and the jet flow angle is integrated, the load space is saved, and the product integration is improved.

Description

Technical Field

[0001] The present invention relates to the field of aircraft technology, and in particular to a thermal protection device and a control method for a reentry vehicle. Background Art

[0002] With the development of the aerospace industry, round-trip transportation between the earth and the sky and deep space exploration missions will be the focus of future research.

[0003] Compared with traditional reentry deceleration methods and inflatable reentry vehicles, the existing mechanically deployable reentry vehicles have the advantages of small envelope constraints, high carrying efficiency and good deceleration effect. However, the reentry vehicle uses traditional ballistic reentry process to generate a large amount of aerodynamic heat, which causes burns to the vehicle surface and the entire vehicle. How to effectively and reasonably provide thermal protection for the reentry vehicle is one of the problems that need to be solved urgently. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a thermal protection device and a control method for a reentry vehicle, so as to improve the jet drop efficiency under complex working conditions and save the jet flow rate.

[0005] In a first aspect, the present invention provides a thermal protection device for a reentry vehicle, comprising:

[0006] Gas cylinder, which is used to store jet working medium gas;

[0007] A regulating valve is used to adjust the jet flow rate, one end of which is connected to the outlet of the gas cylinder;

[0008] The angle-variable module includes a hose and a transmission mechanism, wherein one end of the hose is connected to the end of the regulating valve away from the gas cylinder, and one end of the transmission mechanism is connected to the hose and the other end is connected to the regulating valve;

[0009] The controller is connected to the regulating valve and the transmission mechanism respectively. The controller is used to:

[0010] Based on the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained; the transmission mechanism is controlled to make the output flow rate of the regulating valve the jet flow rate; the transmission mechanism is controlled to work so that the swing angle of the hose is the jet angle.

[0011] Optionally, the transmission mechanism includes: a double-headed motor, a connecting rod, and a transmission assembly, one end of the double-headed motor is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to one end of the connecting rod, the other end of the connecting rod is connected to the hose, and a controller is connected to the double-headed motor, and the controller is further used to:

[0012] Based on the jet angle, the first torque of the double-headed motor is obtained; the action of the double-headed motor is controlled so that the double-headed motor rotates with the first torque to drive the swing angle of the hose as the jet angle.

[0013] Optionally, the transmission assembly includes a transmission rod, a connecting piece and a conveyor belt, one end of the transmission rod is connected to the connecting rod, and the other end is connected to the conveyor belt through the connecting piece, wherein the connecting piece is threadedly connected to the transmission rod.

[0014] Optionally, the other end of the double-headed motor is connected to the regulating valve, and the controller is connected to the double-headed motor, and the controller is further used to:

[0015] Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate the second torque to drive the outlet flow of the regulating valve to be the jet flow.

[0016] Optionally, the regulating valve includes a valve body, a ball and a valve stem. The ball is arranged in the valve body, one end of the valve stem passes through the valve body and is connected to the ball, and a fan-shaped opening is provided on the ball.

[0017] Optionally, the device further comprises a connecting pipe, one end of which is connected to one end of the hose, and the other end of which is connected to the outlet of the regulating valve.

[0018] In a second aspect, the present invention further provides a method for controlling a thermal protection device of a reentry vehicle, comprising:

[0019] Based on the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained;

[0020] Control the action of the transmission mechanism so that the output flow of its regulating valve is the jet flow;

[0021] The transmission mechanism is controlled to work so that the swing angle of the hose is the jet angle.

[0022] Optionally, controlling the transmission mechanism to operate so that the output flow of the regulating valve is a jet flow includes:

[0023] Based on the jet angle, the first torque of the double-headed motor is obtained; the action of the double-headed motor is controlled so that the double-headed motor rotates with the first torque to drive the swing angle of the hose as the jet angle.

[0024] Optionally, controlling the transmission mechanism to operate so that the swing angle of the hose is the jet angle includes:

[0025] Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate the second torque to drive the outlet flow of the regulating valve to be the jet flow.

[0026] Optionally, the method further includes:

[0027] When a single jet is completed, the double-head motor is controlled to work so that the hose is at the initial 0 attack angle position and the regulating valve is in the closed state.

[0028] An embodiment of the present invention provides a thermal protection device and control method for a re-entry vehicle. By adjusting the output flow of a regulating valve through a transmission mechanism, more precise jets can be performed in response to changes in complex flight conditions, making the aircraft more adaptable during the overall flight process while saving jet flow. By adjusting the jet angle of the hose through a transmission mechanism, the problem of poor jet heat reduction effect of traditional jet devices under certain attack angles is solved. The thermal protection device of the present invention can achieve jets facing the incoming flow at multiple attack angles, making efficient use of the jet. By integrating the adjustment of the jet flow and the jet angle, the control difficulty is greatly reduced, the load space is saved, and the product integration is improved.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of an existing non-ablation adaptive heat protection and drag reduction system provided by the present invention is shown;

[0032] Figure 2 A schematic structural diagram of a thermal protection device for a reentry vehicle provided by an embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram of a mechanically deployable reentry vehicle provided by the present invention is shown;

[0034] Figure 4 A schematic diagram of an exploded structure of a regulating valve provided by an embodiment of the present invention is shown;

[0035] Figure 5 A schematic structural diagram of a sphere provided by an embodiment of the present invention is shown;

[0036] Figure 6 A schematic diagram showing the working process of the thermal protection device of the reentry vehicle provided by an embodiment of the present invention is shown;

[0037] Figure 7 A flow chart of a method for controlling thermal protection of a reentry vehicle provided by an embodiment of the present invention is shown.

[0038] Explanation of the main component symbols: 100-gas cylinder; 200-regulating valve; 300-double-head motor; 400-connecting pipe; 500-connecting rod; 600-hose; 700-transmission rod; 800-conveyor belt; 210-valve stem; 220-valve body; 230-ball; 240-sealing gasket; 250-valve seat; 260-pressure cover. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0040] The existing methods of reducing drag and preventing heat include reverse jet, adding drag reducing rod, adding aerodynamic disk, windward cavity and energy deposition, etc. Figure 1 As shown, the existing non-ablative adaptive heat protection and drag reduction system places liquid at the front end of the aircraft head and sets a support rod. By changing the flow field structure and generating heat through friction, the liquid evaporates and is ejected.

[0041] During their research, the inventors discovered that existing methods of thermal protection present numerous problems. For example, using jets to release heat requires carrying a working fluid, which takes up a significant amount of space inside the vehicle, and the mass of the working fluid reduces the payload the vehicle can carry. Using an additional device, the device, exposed to the exterior of the vehicle, can be burned, affecting the reentry vehicle's shape and center of mass, and failing to meet reusability requirements. Based on this, an embodiment of the present invention provides a thermal protection device and control method for a reentry vehicle. This device, through a transmission mechanism, adjusts the output flow of a regulating valve and the jet angle of a regulating hose, achieving more precise jet control and reducing jet flow in complex flight conditions. This reduces the difficulty of controlling thermal protection, conserves payload space, and improves product integration.

[0042] Figure 2 The following is a schematic diagram of the structure of a thermal protection device for a reentry vehicle provided by an embodiment of the present invention. Figure 2As shown, the device includes: a gas cylinder 100, a regulating valve 200, a variable angle module and a controller, wherein the variable angle module includes a hose 600 and a transmission mechanism, one end of the hose 600 is connected to the end of the regulating valve 200 away from the gas cylinder 100, one end of the transmission mechanism is connected to the hose 600, and the other end is connected to the regulating valve 200, one end of the regulating valve 200 is connected to the outlet of the gas cylinder 100, the gas cylinder 100 is used to store the jet working fluid gas; the regulating valve 200 is used to adjust the jet flow rate, and the controller is respectively connected to the regulating valve 200 and the transmission mechanism.

[0043] The controller is used to: obtain the jet flow and jet angle corresponding to the jet working condition based on the jet working condition; control the transmission mechanism so that the output flow of the regulating valve 200 is the jet flow; control the transmission mechanism so that the swing angle of the hose 600 is the jet angle.

[0044] like Figure 3 As shown, the thermal protection device of the reentry vehicle of the present invention is installed inside the heat shield of a mechanically deployable reentry vehicle. A mechanically deployable reentry vehicle has two main flight modes: a retracted heat shield during launch and on-orbit, and an extended heat shield during reentry. The heat shield, resembling an umbrella, forms a large aerodynamic deceleration surface in the extended state while also providing thermal insulation. The heat shield has a certain internal space within which the thermal protection device of the reentry vehicle of the present invention can be installed.

[0045] A thermal protection device for a re-entry vehicle provided by an embodiment of the present invention can adjust the output flow of a regulating valve through a transmission mechanism, and can perform more precise jets in response to changes in complex flight conditions, so that the aircraft has stronger adaptability during the overall flight process, and at the same time can save jet flow; by adjusting the jet angle of the hose through the transmission mechanism, the problem of poor jet heat reduction effect of traditional jet devices under certain attack angles is solved. The thermal protection device of the present invention can realize jet facing the incoming flow at multiple attack angles, and make efficient use of the jet; by integrating the adjustment of the jet flow and the jet angle, the control difficulty is greatly reduced, the load space is saved, and the product integration is improved.

[0046] In an optional embodiment, the transmission mechanism includes: a double-headed motor 300, a connecting rod 500 and a transmission assembly, one end of the double-headed motor 300 is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to one end of the connecting rod 500, the other end of the connecting rod 500 is connected to the hose 600, and a controller is connected to the double-headed motor 300, and the controller is further used to:

[0047] Based on the jet angle, the first torque of the double-headed motor 300 is obtained; the double-headed motor 300 is controlled to rotate the first torque to drive the swing angle of the hose 600 to be the jet angle.

[0048] In an optional embodiment, the transmission assembly includes a transmission rod 700, a connecting member and a conveyor belt 800, one end of the transmission rod 700 is connected to the connecting rod 500, and the other end is connected to the conveyor belt 800 through the connecting member, wherein the connecting member is threadedly connected to the transmission rod 700.

[0049] Specifically, if Figure 1 As shown, this transmission assembly converts rotary motion into linear motion and generally employs a screw-nut structure. One end of the connecting rod 500 is fixedly connected to the side wall of the output port of the hose 600, and the other end is fixedly connected to one end of the screw. The other end of the screw is threadedly connected to the nut. The outer wall of the nut abuts the inner wall of one end of the transmission belt. The other end of the transmission belt is connected to one of the output shafts of the double-headed motor 300.

[0050] The output shaft of the double-headed motor 300 rotates, driving the transmission belt to move. Under the friction of the transmission belt, the nut rotates, thereby driving the lead screw to move linearly to drive the hose 600 to swing, thereby adjusting the injection angle of the jet.

[0051] In an optional embodiment, the other end of the double-headed motor 300 is connected to the regulating valve 200, and the controller is connected to the double-headed motor 300, and the controller is further used to:

[0052] Based on the jet flow, a second torque of the double-headed motor 300 is obtained; the double-headed motor 300 is controlled to work so that the double-headed motor 300 rotates the second torque to drive the outlet flow of the regulating valve 200 to be the jet flow.

[0053] In an optional embodiment, the regulating valve 200 includes a valve body 220, a ball 230 and a valve stem 210. The ball 230 is arranged in the valve body 220. One end of the valve stem 210 passes through the valve body 220 and is connected to the ball 230. A fan-shaped opening is provided on the ball 230.

[0054] Specifically, the inlet of the regulating valve 200 is connected to the outlet of the gas cylinder 100, the outlet of the regulating valve 200 is connected to the hose 600, and the valve stem 210 of the regulating valve 200 is connected to the other output shaft of the double-headed motor 300. The double-headed motor 300 regulates the opening and closing of the regulating valve 200, thereby adjusting the jet flow rate.

[0055] like Figure 4As shown, the regulating valve 200 is a miniature electric ball valve, which mainly includes a valve body 220, a valve seat 250, a ball 230, a sealing gasket 240, a valve stem 210, and a gland 260. The ball 230 is disposed within the valve body 220. The valve stem 210 passes through the valve body 220 and is fixedly connected to one end of the ball 230. The sealing gasket 240, valve seat 250, and gland 260 are disposed on one side of the valve body 220. The other end of the valve body 220 is fixedly connected to the other output shaft of the double-headed motor 300. The double-headed motor 300 drives the valve stem 210 to rotate, thereby driving the ball 230 to rotate, thereby adjusting the valve 200 opening and thereby regulating the gas flow.

[0056] Further, if Figure 5 As shown, the ball 230 of the regulating valve 200 of the present invention has a fan-shaped through hole.

[0057] In an optional embodiment, a connecting pipe 400 is further included, one end of the connecting pipe 400 is connected to one end of the hose 600 , and the other end is connected to the outlet of the regulating valve 200 .

[0058] Furthermore, the gas cylinder 100 in the present invention is a small gas cylinder for storing the jet working fluid gas, and relies on the pressure difference between the preset gas storage pressure and the external air pressure to push the gas to be ejected outward.

[0059] like Figure 6 As shown, the working process of a thermal protection device of a reentry vehicle in this application is as follows:

[0060] Initialization process: At this time, the regulating valve is in the closed state, the hose is at the initial 0 angle of attack and facing the incoming flow, the jet gas is stored in the gas cylinder, and the gas jet channel is in the blocked state;

[0061] Jet opening process: When the aircraft encounters a working condition requiring jet, first, the double-headed motor opens the regulating valve to ensure that the jet can be ejected. Then, according to the flight working condition, it is determined whether the jet flow rate and jet angle need to be changed. That is, according to the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained.

[0062] Jet variable flow control process: When the jet flow needs to be adjusted according to the jet working conditions, the jet variable flow process is started. The required jet flow and the motor torque required to rotate the regulating valve to the flow are calculated based on the required aerodynamic heat reduction, so that the required flow jet enters the pipeline and is finally ejected through the hose, thereby adapting to thermal protection under different working conditions;

[0063] Jet angle control process: When the jet angle needs to be adjusted according to the jet working conditions, the jet angle change process is started. The required jet angle facing the incoming flow and the motor torque at this jet angle are calculated based on the change in the flight angle of attack. The transmission mechanism is used to make the hose outlet reach a position facing the incoming flow. The jet passes through the regulating valve and is finally ejected from the hose, thereby achieving hose angle adjustment and enhancing the adaptability of the jet to reduce heat.

[0064] End of single jet: When a single jet ends, it returns to the initialization process, the regulating valve is in the closed state, the hose is reset, and waits for the next jet process.

[0065] The thermal protection device for a reentry vehicle provided by the present invention has the following beneficial effects:

[0066] 1. By adjusting the size of the regulating valve surface to control and regulate the jet flow, more precise jet flow can be achieved in response to changes in complex flight conditions. Compared with traditional jet devices, it has greater adaptability during the entire flight process and can save jet flow;

[0067] 2. The transmission mechanism adjusts the jet angle of the hose, solving the problem of poor heat reduction effect of traditional jet devices under different attack angles. Adjusting the jet angle based on the jet working conditions can achieve direct jet flow at multiple attack angles, making efficient use of the jet.

[0068] 3. Integrating the variable flow and variable angle control methods into one thermal protection device reduces the control difficulty, saves load space and improves product integration.

[0069] Figure 7 A flow chart of a control method for a thermal protection device of a reentry vehicle provided by an embodiment of the present invention is shown as follows: Figure 7 As shown, the method includes the following steps:

[0070] Step S110: Based on the jet working condition, obtain the jet flow rate and jet angle corresponding to the jet working condition;

[0071] Step S120, controlling the transmission mechanism to operate so that the output flow of the regulating valve is the jet flow;

[0072] Step S130: Control the transmission mechanism to operate so that the swing angle of the hose is the jet angle.

[0073] In an optional embodiment, in step S120, controlling the transmission mechanism to adjust the output flow of the regulating valve to be the jet flow includes:

[0074] Based on the jet angle, the first torque of the double-headed motor is obtained; the action of the double-headed motor is controlled so that the double-headed motor rotates with the first torque to drive the swing angle of the hose as the jet angle.

[0075] In an optional embodiment, in step S130, controlling the transmission mechanism to operate so that the swing angle of the hose is the jet angle includes:

[0076] Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate the second torque to drive the outlet flow of the regulating valve to be the jet flow.

[0077] In an optional embodiment, the method further includes:

[0078] When a single jet is completed, the double-head motor is controlled to work so that the hose is at the initial 0 attack angle position and the regulating valve is in the closed state.

[0079] The method provided in the embodiment of the present application has the same implementation principle and technical effects as those in the aforementioned device embodiment. For the sake of brief description, for matters not mentioned in the method embodiment, reference can be made to the corresponding content in the aforementioned device embodiment.

[0080] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0081] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0082] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0083] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. However, these modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. They should all be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A thermal protection device for a reentry vehicle, characterized in that: include: A gas cylinder, wherein the gas cylinder is used to store the jet working medium gas; A regulating valve, used for adjusting the jet flow rate, one end of the regulating valve being connected to the outlet of the gas cylinder; The angle-variable module comprises a hose and a transmission mechanism, wherein one end of the hose is connected to the end of the regulating valve away from the gas cylinder, and one end of the transmission mechanism is connected to the hose, and the other end is connected to the regulating valve; wherein the transmission mechanism comprises: a double-headed motor, a connecting rod, and a transmission assembly, wherein one end of the double-headed motor is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the hose; the transmission assembly comprises a transmission rod, a connecting piece, and a conveyor belt, wherein one end of the transmission rod is connected to the connecting rod, and the other end is connected to the conveyor belt via the connecting piece, wherein the connecting piece is threadedly connected to the transmission rod; A controller is connected to the regulating valve and the transmission mechanism respectively, and is used to: Based on the jet working condition, the jet flow and jet angle corresponding to the jet working condition are obtained; the transmission mechanism is controlled to operate so that the output flow of the regulating valve is the jet flow; the transmission mechanism is controlled to operate so that the swing angle of the hose is the jet angle; wherein, the controller is connected to the double-headed motor, and the controller is also used to: obtain the first torque of the double-headed motor based on the jet angle; control the operation of the double-headed motor so that the double-headed motor rotates the first torque to drive the swing angle of the hose to the jet angle.

2. A thermal protection device for a reentry vehicle according to claim 1, characterized in that: The other end of the double-headed motor is connected to the regulating valve, and the controller is connected to the double-headed motor. The controller is further used to: Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to operate so as to rotate the second torque to drive the outlet flow of the regulating valve to be the jet flow.

3. A thermal protection device for a reentry vehicle according to claim 1 or 2, characterized in that: The regulating valve includes a valve body, a ball and a valve stem. The ball is arranged in the valve body. One end of the valve stem passes through the valve body and is connected to the ball. A fan-shaped opening is provided on the ball.

4. The thermal protection device for a reentry vehicle according to claim 1, characterized in that: It also includes a connecting pipe, one end of which is connected to one end of the hose, and the other end of which is connected to the outlet of the regulating valve.

5. A control method for a thermal protection device of a reentry vehicle according to any one of claims 1 to 4, characterized in that: include: Based on the jet working condition, a jet flow rate and a jet angle corresponding to the jet working condition are obtained; Controlling the transmission mechanism to make the output flow of the regulating valve equal to the jet flow; wherein, based on the jet angle, obtaining a first torque of the double-headed motor; controlling the double-headed motor to rotate the double-headed motor to produce the first torque, thereby driving the swing angle of the hose to be equal to the jet angle; The transmission mechanism is controlled to operate so that the swing angle of the hose is equal to the jet angle.

6. The method for controlling a thermal protection device of a reentry vehicle according to claim 5, characterized in that: Controlling the transmission mechanism to make the swing angle of the hose equal to the jet angle includes: Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to operate so as to rotate the second torque to drive the outlet flow of the regulating valve to be the jet flow.

7. The method for controlling a thermal protection device of a reentry vehicle according to claim 5, characterized in that: The method further comprises: When a single jet is completed, the double-head motor is controlled to work so that the hose is in the initial 0 attack angle position and the regulating valve is in the closed state.

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