Detection system and method for tank and engine frame

Abstract

The present invention relates to the field of launch vehicles and provides a detection system for a tank and an engine frame. The system comprises: a liquid nitrogen filling and discharging mechanism comprising a filling pipe and a liquid nitrogen container, the filling pipe being used to connect the tank and the liquid nitrogen container; a pressurizing mechanism comprising a pressurizing air pipe being connected to the tank; a thrust loading mechanism located at the bottom of the engine frame and being used to apply thrust to the center of the engine frame; and a collection mechanism comprising a temperature detecting element and a strain detecting element, the temperature detecting element and the strain detecting element being provided on the surface of the tank and the engine frame, respectively, for detecting the surface temperature and strain of the tank and the surface temperature and strain of the engine frame, thereby realizing multiple performance detection of the tank.

Description

Technical Field

[0001] The present invention relates to the technical field of launch vehicles, and in particular to a detection system and a detection method for a tank and an engine frame. Background Art

[0002] The tank is the container for storing propellant in the rocket. During the rocket design process, designers will flexibly combine different diameters and different materials to develop a variety of tanks with different sizes, materials, costs, etc. Whether the rocket can take off stably after filling, the stability of the tank performance is one of the core factors.

[0003] During the research and development process, the new tank needs to be tested to verify whether it meets the requirements for use of the rocket.

[0004] Existing testing technologies only test the tank's bearing capacity and whether there are any leaks in the tank's welds under low-temperature conditions with a certain internal pressure, or conduct separate static tests on the engine frame to verify its ability to withstand the engine's axial pressure load under normal temperature conditions. The test data is limited, and the propellant in the tank is an extremely low-temperature liquid. The engine frame's bearing capacity will change under normal temperature and extremely low-temperature conditions. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that it is difficult to detect the tank and the engine frame under the working conditions of low temperature, constant pressure and concentrated load at the same time, thereby providing a detection system and method for the tank and the engine frame.

[0006] The present invention provides a detection system for a tank and an engine frame, comprising: a liquid nitrogen filling and discharging mechanism, comprising a filling pipe and a liquid nitrogen container, the filling pipe being used to connect the tank and the liquid nitrogen container; a pressurizing mechanism, comprising a pressurizing air pipe, the pressurizing air pipe being connected to the tank; a thrust loading mechanism, located at the bottom of the engine frame, the thrust loading mechanism being used to apply thrust to the center of the engine frame; and a collection mechanism, comprising a temperature detection element and a strain detection element, the temperature detection element and the strain detection element being provided on the surface of the tank and the engine frame, respectively, for detecting the surface temperature and strain of the tank and the surface temperature and strain of the engine frame.

[0007] According to the present invention, a tank and engine frame detection system is provided, further comprising: a servo mechanism including a plurality of servo actuators, one end of each servo actuator being connected to the thrust loading mechanism and the other end being connected to the engine frame, wherein the plurality of servo actuators are configured to be individually driven to drive the thrust loading mechanism to rotate so that an angle is generated between a centerline of the thrust loading mechanism and a centerline of the engine frame.

[0008] According to the present invention, a detection system for a tank and an engine frame is provided, wherein the thrust loading mechanism includes: a pressure seat abutting the center position of the bottom of the engine frame; a hydraulic cylinder and a universal joint, wherein the bottom end of the universal joint is connected to the end of the hydraulic rod of the hydraulic cylinder, and the top end of the universal joint is connected to the bottom of the pressure seat; one end of the servo actuator is connected to the hydraulic cylinder, and the servo actuator is used to drive the thrust loading mechanism to rotate about the universal joint.

[0009] According to the present invention, a detection system for a tank and an engine frame is provided. The servo actuator includes a drive unit and a telescopic rod. The drive unit is used to adjust the length of the telescopic rod. The engine frame includes a base frame and brackets. One end of a plurality of the brackets is distributed around the base frame, and the other end of the brackets abuts the rear bottom of the tank. The ends of the plurality of telescopic rods are respectively mounted on the plurality of brackets.

[0010] According to the present invention, a detection system for a tank and an engine frame is provided, wherein the bottom ends of a plurality of brackets are respectively connected to the diagonal portions of the base frame, and each bracket is provided with two clamping arms arranged at an angle, and the ends of the clamping arms are used to cooperate with the rear bottom of the tank.

[0011] According to the present invention, a detection system for a tank and an engine frame is provided. The liquid nitrogen charging and discharging mechanism further includes: a discharge pipe connected to the filling pipe; a switching valve provided at the connection point between the discharge pipe and the filling pipe; and a hydraulic pressure sensor, wherein a measuring point of the hydraulic pressure sensor is located inside the liquid nitrogen charging and discharging mechanism.

[0012] According to the present invention, a detection system for a tank and an engine mount is provided, further comprising: a safety mechanism located at a vent of the tank; the safety mechanism comprising: an exhaust pipe connected to the tank and provided with an exhaust valve and a safety valve; a pressure sensor for detecting the pressure within the tank; and a three-way valve connected to the pressurized air pipe, the vent, and the exhaust pipe, respectively.

[0013] According to the present invention, a detection system for a tank and an engine frame is provided, wherein a front short case surface of the tank has a front short case measuring point, a rear short case surface of the tank has a rear short case measuring point, and a surface of the engine frame has a frame measuring point, and a temperature detection member is respectively connected to the front short case measuring point, the rear short case measuring point, and the frame measuring point.

[0014] The present invention also provides a tank and engine mount detection method, which is applied to the above-mentioned tank and engine mount detection system, comprising: using the liquid nitrogen filling and discharging mechanism to inject liquid nitrogen into the tank to a preset height; using the pressurizing mechanism to inject gas into the tank to a preset pressure value, and maintaining the pressure value for a preset time; using the temperature detection element to obtain the surface temperature of the tank; and using the strain detection element to obtain surface strain data of the tank.

[0015] According to the present invention, a method for detecting a tank and an engine frame is also provided, wherein the liquid nitrogen adding and discharging mechanism is used to inject liquid nitrogen into the tank to a preset height, the pressurizing mechanism is used to inject gas into the tank to a preset pressure value, and the pressure value is maintained for a preset time. The method further comprises: the thrust loading mechanism applies thrust to the center position of the chassis; the thrust data of the thrust loading mechanism is recorded; and the acquisition mechanism obtains surface temperature and strain data of the engine frame.

[0016] According to the present invention, a method for detecting a tank and an engine frame is also provided. After the thrust loading mechanism applies thrust to the center position of the chassis, the method further includes: the thrust loading mechanism applies thrust to a preset value, and a plurality of servo actuators extend and retract to cause the thrust loading mechanism to deflect; and recording the angular direction and angular value between the thrust applied by the thrust loading mechanism and the center line of the engine frame.

[0017] The technical solution of the present invention has at least the following advantages:

[0018] The tank and engine frame detection system provided by the present invention utilizes a liquid nitrogen charging and discharging mechanism to supply a fixed amount of liquid nitrogen into the tank, and a pressurizing mechanism to supply gas into the tank to control the gas pressure within the tank. Furthermore, a thrust loading mechanism applies thrust to the bottom of the engine frame, simultaneously applying the thrust to the tank and the engine frame. Simultaneously, the low temperature of the tank is transferred to the engine frame. This simulates low-temperature, constant-pressure, and concentrated-load operating conditions, and then uses a data collection mechanism to collect the surface temperature and surface strain of the tank and engine frame. This allows the tank's bearing capacity under these conditions to be determined. Furthermore, the system can also test the engine frame's bearing capacity under multiple operating conditions: low temperature, tank pressure, and concentrated load.

[0019] The present invention provides a method for inspecting a tank and an engine mount. First, a preset amount of liquid nitrogen is injected into the tank, gas is introduced to a preset pressure, and a load is applied to the center of the engine mount. A data acquisition mechanism monitors the temperature and strain of the tank and engine mount in real time, thereby obtaining the temperature resistance and endurance performance of the inspected tank and engine mount, as well as changes in performance over time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a detection system for a tank and an engine mount according to an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a liquid nitrogen adding and discharging mechanism in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a safety mechanism and a pressurizing mechanism in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a collection mechanism in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a thrust loading mechanism in an embodiment of the present invention;

[0026] Figure 6 A structural diagram of a servo actuator in an embodiment of the present invention;

[0027] Figure 7 A top view of an engine frame in an embodiment of the present invention;

[0028] Figure 8 A front view of an engine frame in an embodiment of the present invention;

[0029] Figure 9 A flow chart of a method for detecting a tank and an engine mount according to an embodiment of the present invention;

[0030] Figure 10 A flow chart of another method for detecting a tank and an engine mount according to an embodiment of the present invention;

[0031] Figure 11 The present invention provides a flowchart of another method for detecting a tank and an engine mount in accordance with an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Tank; 2. Engine frame; 201. Underframe; 202. Bracket; 2021. Clamping arm; 3. Liquid nitrogen filling and discharging mechanism; 301. Filling pipe; 302. Liquid nitrogen container; 303. Discharge pipe; 304. Switching valve; 305. Hydraulic sensor; 4. Pressurization mechanism; 401. Pressurized air pipe; 5. Thrust loading mechanism; 501. Pressure seat; 502. Hydraulic cylinder; 503. Universal joint; 6. Collection mechanism; 601. Temperature detection element; 6011. Front short shell measuring point; 6012. Rear short shell measuring point; 6013. Frame measuring point; 602. Strain detection element; 7. Servo mechanism; 701. Servo actuator; 7011. Drive unit; 7012. Telescopic rod; 8. Safety mechanism; 801. Pressure sensor; 802. Exhaust pipe; 803. Three-way valve; 9. Control mechanism. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and 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.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] The following combination Figures 1 to 8The present invention describes a tank and engine mount detection system, comprising a liquid nitrogen charging and discharging mechanism 3, a pressurizing mechanism 4, a thrust loading mechanism 5, and a collection mechanism 6. The liquid nitrogen charging and discharging mechanism 3 adds and discharges liquid nitrogen into and out of the tank 1, the pressurizing mechanism 4 controls the pressure within the tank 1, the thrust loading mechanism 5 controls the thrust outside the tank 1 and the thrust of the engine mount 2, and the collection mechanism 6 obtains the status of the tank 1 and the engine mount 2, thereby detecting the performance of the tank 1 and the engine mount 2 under various operating conditions.

[0039] In some embodiments, as Figures 1 to 3 As shown, the liquid nitrogen filling and discharging mechanism 3 includes a filling pipe 301 and a liquid nitrogen container 302, and the filling pipe 301 is used to connect the storage tank 1 and the liquid nitrogen container 302; the boosting mechanism 4 includes a boosting air pipe 401, and the boosting air pipe 401 is connected to the storage tank 1.

[0040] In this embodiment, the liquid nitrogen container 302 is used to provide liquid nitrogen. When liquid nitrogen needs to be injected into the storage tank 1, the liquid nitrogen is transported from the liquid nitrogen container 302 to the storage tank 1 through the filling pipe 301 until the liquid nitrogen reserve in the storage tank 1 meets the preset demand. The booster gas pipe 401 is a pipeline for conveying gas. One end of the booster gas pipe 401 is connected to the storage tank 1, and the other end is connected to a device with a gas source. In a specific embodiment, the other end of the booster gas pipe 401 is connected to an air pump or a gas tank to inject gas into the storage tank 1 to increase the air pressure in the storage tank 1 until the air pressure reaches the preset demand.

[0041] In some embodiments, as Figure 1 and Figure 5 As shown, the thrust loading mechanism 5 is located at the bottom of the engine frame 2 , and the thrust loading mechanism 5 is used to apply thrust to the center position of the engine frame 2 .

[0042] In this embodiment, the tank 1 is placed on top of the engine frame 2, which serves as a stable support structure. According to testing requirements, a thrust needs to be applied to the tank 1 and the engine frame 2 during the testing process. The thrust is applied by the thrust loading mechanism 5 at the center of the bottom of the engine frame 2. The engine frame 2 uniformly applies the thrust to the tank 1 to test the concentrated load bearing capacity of the tank 1 and the engine frame 2.

[0043] In some embodiments, as Figure 1 and Figure 4 As shown, the acquisition mechanism 6 includes a temperature detection component 601 and a strain detection component 602. The temperature detection component 601 and the strain detection component 602 are both provided on the surface of the tank 1 and the engine frame 2, and are used to detect the apparent temperature and strain of the tank 1 and the surface temperature and strain of the frame.

[0044] In this embodiment, the data acquisition mechanism 6 is used to collect the temperature and strain of the tank 1 and the engine frame 2. During the testing process, the increase and decrease of the pressure in the tank 1, the addition and removal of liquid nitrogen in the tank 1, and the changes in the force applied by the thrust loading mechanism 5 can simulate various operating conditions of the tank 1 and the engine frame 2. The liquid nitrogen in the tank 1 is a cryogenic liquid. Under various operating conditions such as the liquid volume, gas pressure, and external concentrated force applied to the tank 1, the surface temperature and shape of the tank 1 will change accordingly. By recording and calculating these changes, the performance of the tank 1 can be reflected. The data acquisition mechanism 6 obtains the surface temperature and strain of the tank 1 and the surface temperature and strain of the frame under various operating conditions to detect the load-bearing capacity of the tank 1 and the engine frame 2. A temperature detection element 601 and a strain detection element 602 are provided on the surface of the tank 1, and a temperature detection element 601 and a strain detection element 602 are also provided on the surface of the engine frame 2.

[0045] In some specific embodiments, the temperature detecting element is a thermometer, and the strain detecting element is a resistance strain gauge or a contact strain gauge.

[0046] It should be noted that by assembling tank 1 and engine mount 2 together for testing and simulating operating conditions using the liquid nitrogen charging / discharging mechanism 3, the pressurizing mechanism 4, and the thrust loading mechanism 5, it is possible to simulate low-temperature, constant-pressure, and concentrated-load operating conditions for tank 1, testing its performance under these conditions. Simultaneously, the liquid nitrogen charging / discharging mechanism 3, the thrust loading mechanism 5, and the tank 1 can also simulate low-temperature and concentrated-load operating conditions for engine mount 2, testing its performance under these conditions. The engine mount 2 provides a concentrated-load operating condition for tank 1, while the tank 1 provides a low-temperature operating condition for engine mount 2. By simulating operating conditions using the interaction between the two components under test, more simulation conditions are provided and the testing system and process are simplified.

[0047] In some embodiments, as Figure 1 and Figure 6 As shown, the tank and engine mount detection system further includes a servo mechanism 7, including a plurality of servo actuators 701. One end of the servo actuator 701 is connected to the thrust loading mechanism 5, and the other end is connected to the engine mount 2. The plurality of servo actuators 701 are configured to be driven individually to drive the thrust loading mechanism 5 to rotate so that an angle is generated between the centerline of the thrust loading mechanism 5 and the centerline of the engine mount 2.

[0048] In this embodiment, the servo actuator 701 is used to drive the thrust loading mechanism 5, creating an angle of rotation between the centerline of the thrust loading mechanism 5 and the centerline of the engine frame 2. One end of the servo actuator 701 is connected to the thrust loading mechanism 5, and the other end of the servo actuator 701 is connected to the engine frame 2. The engine frame 2 and the tank 1 are fixed. Driven by the servo actuator 701, the thrust loading mechanism 5 rotates, so that the thrust of the thrust loading mechanism 5 is applied obliquely to the engine frame 2 and the tank 1, thereby testing the ability of the tank 1 and the engine frame 2 to withstand oblique thrust at a certain angle.

[0049] In some embodiments, as Figure 5 As shown, the thrust loading mechanism 5 further includes a pressure seat 501, a hydraulic cylinder 502 and a universal joint 503. The pressure seat 501 abuts against the center position of the bottom of the engine frame 2. The bottom end of the universal joint 503 is connected to the end of the hydraulic rod of the hydraulic cylinder 502. The top end of the universal joint 503 is connected to the bottom of the pressure seat 501. One end of the servo actuator 701 is connected to the hydraulic cylinder 502. The servo actuator 701 is used to drive the thrust loading mechanism 5 to rotate about the universal joint 503 as the axis.

[0050] In this embodiment, the pressure seat 501 is used to support and connect the engine frame 2, and abuts against the bottom of the engine frame 2. A universal joint 503 is provided in the thrust loading mechanism 5 to accommodate the rotation of the thrust loading mechanism 5. The top end of the universal joint 503 is connected to the bottom of the pressure seat 501, and the bottom end of the universal joint 503 is connected to the end of the hydraulic rod of the hydraulic cylinder 502. Therefore, the center lines of the pressure seat 501 and the hydraulic cylinder 502 can rotate relative to each other, that is, the engine frame 2, the tank 1, and the force application direction of the hydraulic cylinder 502 can rotate relative to each other. When one or more of the servo actuators 701 are driven, one end of the servo actuator 701 is fixed, and the other end is pushed by the servo actuator 701, so that the rotation center of the universal joint 503 becomes the rotation center of the engine frame 2 and the hydraulic cylinder 502. After the hydraulic cylinder 502 rotates, the thrust of the hydraulic cylinder 502 relative to the engine frame 2 is applied obliquely to the engine frame 2 and the tank 1.

[0051] In some embodiments, as Figures 6 to 8 As shown, the servo actuator 701 includes a driving unit 7011 and a telescopic rod 7012. The driving unit 7011 is used to adjust the length of the telescopic rod 7012. The engine frame 2 includes a base frame 201 and brackets 202. One end of the multiple brackets 202 is distributed around the base frame 201, and the other end of the brackets 202 is against the rear bottom of the tank 1. The ends of the multiple telescopic rods 7012 are respectively mounted on the multiple brackets 202.

[0052] In this embodiment, the servo actuator 701 consists of a driving portion 7011 and a telescopic rod 7012. By adjusting the telescopic rod 7012 to a certain telescopic length, the purpose of driving the bracket 202 is achieved. One end of multiple brackets 202 is distributed around the base frame 201, and the other end of the brackets 202 forms a support structure that rests on the rear bottom of the tank 1. The end of the telescopic rod 7012 is installed along the bracket 202 to drive the engine frame to rotate at a certain angle relative to the thrust loading mechanism 5 in different directions.

[0053] In a specific embodiment, four brackets 202 are provided, evenly distributed in four directions of the base frame 201. When the servo actuator 701 on one of the brackets 202 is driven, the angle between the engine frame 2 and the hydraulic cylinder 502 is biased toward the bracket 202 on that side; when the servo actuators 701 on two adjacent brackets 202 are driven, the angle between the engine frame 2 and the hydraulic cylinder 502 is biased toward between the two adjacent brackets 202, thereby simulating working conditions in multiple directions.

[0054] In some embodiments, as Figure 7 and Figure 8 As shown, the bottom ends of the multiple brackets 202 are respectively connected to the diagonal corners of the base frame, and each bracket 202 is provided with two clamping arms 2021 arranged at an angle, and the ends of the clamping arms 2021 are used to cooperate with the rear bottom of the tank 1.

[0055] In this embodiment, the brackets 202 are respectively located at the diagonals of the base frame 201, and four brackets 202 are provided. Therefore, the brackets 202 are respectively located in four relative directions. The clamping arms 2021 at the top ends of the brackets increase the supporting area of ​​the brackets 202. There are two clamping arms 2021 in each direction to support the tank 1, which increases stability. In addition, the ends of the clamping arms 2021 are used to cooperate with the rear bottom of the tank 1, so that the connecting lines of the ends of all the clamping arms 2021 together form a shape that matches the cross-section of the tank 1, so that the ends of the clamping arms 2021 and the outer surface of the tank 1 are engaged with each other, and the thrust applied to the bottom center of the base frame 201 is evenly distributed on the tank 1, thereby ensuring the stability of the detection process.

[0056] In some embodiments, as Figure 2 As shown, the liquid nitrogen charging and discharging mechanism 3 further includes a discharge pipe 303, a switching valve 304 and a hydraulic sensor 305. The discharge pipe 303 is connected to the filling pipe 301; the switching valve 304 is provided at the connection point between the discharge pipe 303 and the filling pipe 301; the measuring point of the hydraulic sensor 305 is located inside the liquid nitrogen charging and discharging mechanism 3.

[0057] In this embodiment, the liquid nitrogen charging and discharging mechanism 3 is used for inputting and discharging liquid nitrogen. The charging pipe 301 and the liquid nitrogen container 302 are responsible for the input, and the discharge pipe 303 is responsible for the discharge. A switching valve 304 is provided at the position where the discharge pipe 303 and the charging pipe 301 are connected. When liquid nitrogen needs to be input, the switching valve 304 is located at the position where it is connected to the charging pipe 301; when liquid nitrogen needs to be discharged, the switching valve 304 is located at the position where it is connected to the discharge pipe 303. The hydraulic pressure sensor 305 detects the pressure of the liquid nitrogen in the liquid nitrogen charging and discharging mechanism 3 in real time to avoid danger caused by excessive hydraulic pressure.

[0058] In some specific embodiments, two hydraulic sensors 305 are provided, and the measuring points are located inside the liquid nitrogen container 302 and inside the filling pipe 301 respectively. The measurement values ​​of the two hydraulic sensors 305 refer to each other and serve as backup to ensure the accuracy of the measurement.

[0059] In some specific embodiments, a loading beam is further provided at the end of the hydraulic rod. The loading beam is used to increase the area of ​​the end of the hydraulic rod and support the universal joint 503 to stabilize the force application process.

[0060] In some specific embodiments, the control system of the hydraulic cylinder 502 includes a solenoid valve and a flow valve. The solenoid valve controls the driving direction of the hydraulic cylinder 502, and the flow valve controls the pressure inside the hydraulic cylinder 502, thereby controlling the thrust of the hydraulic cylinder 502.

[0061] In some embodiments, as Figure 3 As shown, the detection system for the tank and the engine mount further includes a safety mechanism 8, which is located at the vent of the tank 1 and includes a pressure sensor 801, an exhaust pipe 802, and a three-way valve 803. The pressure sensor 801 is used to detect the pressure within the tank 1. The exhaust pipe 802 is connected to the tank 1 and is provided with an exhaust valve and a safety valve. The three-way valve 803 is connected to the pressurized air pipe 401, the vent, and the exhaust port, respectively.

[0062] In this embodiment, the pressure sensor 801 is located within the safety mechanism and monitors the pressure inside the tank 1 in real time. When necessary, the tank 1 is depressurized and the gas inside the tank 1 is discharged from the vent, passing through the three-way valve 803. During the exhaust process, the three-way valve 803 connects the exhaust pipe 802 with the vent. The exhaust valve on the exhaust pipe 802 and the pressurizing mechanism 4 work together to maintain a stable pressure balance within the tank 1. When the pressure inside the tank 1 is excessive and exceeds a safe range, the safety valve on the exhaust pipe 802 is opened to rapidly discharge the gas. During the gas transmission process, the three-way valve 803 connects the pressurized gas pipe 401 with the vent.

[0063] In a specific embodiment, the measuring point of the pressure sensor 801 is located at the vent, or a detection tube connected to the interior of the tank 1 is provided outside the tank 1 so that the measuring point of the pressure sensor 801 is located at the detection tube, which facilitates maintenance, replacement and inspection of the pressure sensor 801.

[0064] In some embodiments, as Figure 4 As shown, the front short shell of the tank has a front short shell measuring point 6011, the rear short shell of the tank has a rear short shell measuring point 6012, and the surface of the engine frame has a frame measuring point 6013, and the temperature detection parts are respectively connected to the front short shell measuring point 6011, the rear short shell measuring point 6012 and the frame measuring point 6013.

[0065] In this embodiment, the lower portion of the tank 1 is used to hold liquid nitrogen, while the upper portion of the tank 1 is primarily used to hold gas. Therefore, there is a certain temperature difference between the upper and lower portions of the tank 1. By providing a front short shell measuring point 6011 and a rear short shell measuring point 6012 at the upper and lower portions of the tank 1, respectively, the temperatures of the upper and lower portions of the tank 1 are measured, thereby enabling a more comprehensive understanding of the temperature of the tank 1. Furthermore, by measuring the temperature of the engine mount 2, the temperature of the engine mount 2 is obtained as a reference value, and the performance of the engine mount 2 is calculated.

[0066] In some embodiments, as Figure 1 As shown, the tank and engine frame detection system further includes a control mechanism 9, which is electrically connected to the liquid nitrogen adding and discharging mechanism 3, the pressurizing mechanism 4, the thrust loading mechanism 5, the acquisition mechanism 6, the servo mechanism 7, and the safety mechanism 8, respectively. The control mechanism 9 obtains data collected by the pressure sensor 801, the hydraulic pressure sensor 305, and the acquisition mechanism 6, and drives the liquid nitrogen adding and discharging mechanism 3 to add and discharge liquid nitrogen, drives the boosting mechanism to increase pressure or the safety mechanism 8 to release pressure, and drives the thrust loading mechanism 5 and the servo mechanism 7 to complete preset driving actions.

[0067] In some embodiments, as Figure 9 As shown, a method for detecting a tank and an engine mount is also proposed, comprising: a liquid nitrogen adding and discharging mechanism 3 injects liquid nitrogen into the tank 1 to a preset height, a pressurizing mechanism 4 injects gas into the tank 1 to a preset pressure value, and maintains the pressure value for a preset time.

[0068] In this embodiment, the preset height of liquid nitrogen and the preset pressure of gas are used as reference values ​​in the detection method to detect the ability of the storage tank 1 to withstand the liquid nitrogen and gas pressures.

[0069] In some embodiments, the temperature detecting element 601 obtains the surface temperature of the storage tank 1 , and the strain detecting element 602 obtains data on the surface strain of the storage tank 1 .

[0070] In this embodiment, after setting the liquid nitrogen and internal gas pressures to the required operating conditions, the condition of the storage tank 1 is tested. First, external inspection is performed to check for leaks and obvious local deformation of the structure. Throughout this process, the temperature detection element 601 and strain detection element 602 in the collection mechanism 6 collect real-time temperature and strain data, obtaining dynamic data that changes with operating conditions and time, and verifying whether the stability of the storage tank 1 meets the expected results.

[0071] In a specific embodiment, a method for detecting a tank and an engine mount is disclosed, comprising:

[0072] S101, the liquid nitrogen adding and discharging mechanism 3 injects liquid nitrogen into the storage tank 1 to a preset height, and the pressurizing mechanism 4 injects gas into the storage tank 1 to a preset pressure value, and maintains the pressure value for a preset time;

[0073] S102 , observing the deformation of the surface of the storage tank 1 , the temperature detection component 601 obtains the temperature of the upper part and the lower part of the storage tank 1 , and the strain detection component 602 obtains the surface strain of the storage tank 1 .

[0074] In some embodiments, as Figure 10 As shown, the liquid nitrogen filling and discharging mechanism 3 injects liquid nitrogen into the tank 1 to a preset height, and the pressurizing mechanism 4 injects gas into the tank 1 to a preset pressure value. After maintaining the pressure value for a preset time, the thrust loading mechanism 5 also applies thrust to the center position of the chassis 201; records the inference data of the thrust loading mechanism 5; and the acquisition mechanism 6 obtains the surface temperature and strain data of the engine.

[0075] In this embodiment, while the internal pressure of the tank 1 is maintained stable, the thrust loading mechanism 5 is activated to apply a concentrated load to the engine frame 2. The thrust is directed toward the center of the chassis 201, applying the load to the center of the engine frame 2. During the testing process, the data collection mechanism 6 collects temperature information of the engine frame 2 in real time, and simultaneously collects strain information of the engine frame 2, to test the combined load-bearing capacity of the internal pressure of the tank 1 and the concentrated load of the engine frame 2 when the entire tank 1 is in a low-temperature state.

[0076] The temperature and strain data of the tank 1 obtained by the acquisition mechanism 6 are data when the tank 1 is at a constant fluid pressure and a constant pressure, and is simultaneously subjected to a concentrated thrust by the engine mount 2. The temperature and concentrated load bearing capacity of the tank 1 under these combined operating conditions can be obtained. The temperature and strain data of the engine mount 2 obtained by the acquisition mechanism 6 are data when the temperature of the tank 1 is conducted and a concentrated thrust is simultaneously applied. The temperature and concentrated load bearing capacity of the engine mount 2 under these combined operating conditions can be obtained.

[0077] In a specific embodiment, another method for detecting a tank and an engine mount is disclosed, comprising:

[0078] S201, the liquid nitrogen adding and discharging mechanism 3 injects liquid nitrogen into the storage tank 1 to a preset height, and the pressurizing mechanism 4 injects gas into the storage tank 1 to a preset pressure value, and maintains the pressure value for a preset time;

[0079] S202, the thrust loading mechanism 5 applies thrust to the center position of the chassis 201; and the thrust data of the thrust loading mechanism 5 is recorded;

[0080] S203 , the temperature detection element 601 obtains temperature information of the engine frame 2 , temperature information of the upper portion of the tank 1 , and temperature information of the lower portion of the tank 1 ; the strain detection element 602 obtains surface strain of the tank 1 and surface strain of the engine frame 2 .

[0081] In one embodiment, if Figure 11 As shown, after the thrust loading mechanism 5 applies thrust to the center position of the chassis 201, the following steps are further included: the thrust loading mechanism 5 applies thrust to a preset value, the multiple servo actuators 701 extend and retract to cause the thrust loading mechanism 5 to deflect; and the angular direction and angular value between the thrust applied by the thrust loading mechanism and the center line of the engine frame 2 are recorded.

[0082] In this embodiment, while maintaining stable air pressure within tank 1 and a stable central thrust load on engine mount 2, servo mechanism 7 is then used to cause thrust loading mechanism 5 to apply a predetermined angle to engine mount 2. Specific data on the direction and magnitude of the applied angle are obtained. During this testing process, data acquisition mechanism 6 simultaneously collects temperature information and strain information from engine mount 2. This embodiment's method verifies the combined load-bearing capacity of tank 1 and engine mount 2 under multiple simulation data conditions, with tank 1 operating at a low temperature, tank pressure stabilized at a predetermined value, the main thrust applied to the engine stabilized at a predetermined value, and a predetermined angle of thrust applied after servo mechanism 7 is activated.

[0083] In a specific embodiment, another method for detecting a tank and an engine mount is disclosed, comprising:

[0084] S301, the liquid nitrogen adding and discharging mechanism 3 injects liquid nitrogen into the storage tank 1 to a preset height, and the pressurizing mechanism 4 injects gas into the storage tank 1 to a preset pressure value, and maintains the pressure value for a preset time;

[0085] S302, the thrust loading mechanism 5 applies a preset thrust to the center position of the chassis 201;

[0086] S303, the servo mechanism 7 is driven to create an angle between the center line of the engine frame 2 and the center line of the hydraulic cylinder 502;

[0087] S304, recording the angle direction and angle data of the turning angle;

[0088] S305 , the temperature detection element 601 obtains temperature information of the engine frame 2 , temperature information of the upper portion of the tank 1 , and temperature information of the lower portion of the tank 1 ; the strain detection element 602 obtains surface strain of the tank 1 and surface strain of the engine frame 2 .

[0089] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A tank and engine frame detection system, characterized in that: include: A liquid nitrogen filling and discharging mechanism (3) comprises a filling pipe (301) and a liquid nitrogen container (302), wherein the filling pipe (301) is used to connect the storage tank (1) and the liquid nitrogen container (302); A pressurizing mechanism (4) comprising a pressurizing air pipe (401), wherein the pressurizing air pipe (401) is in communication with the storage tank (1); A thrust loading mechanism (5) is located at the bottom of the engine frame (2), and the thrust loading mechanism (5) is used to apply thrust to the center position of the engine frame (2); The collecting mechanism (6) comprises a temperature detecting member (601) and a strain detecting member (602). The temperature detecting member (601) and the strain detecting member (602) are both provided on the surface of the tank (1) and the engine frame (2), and are used to detect the surface temperature and strain of the tank (1) and the surface temperature and strain of the engine frame.

2. The tank and engine mount detection system according to claim 1, characterized in that: Also includes: The servo mechanism (7) includes a plurality of servo actuators (701), one end of each servo actuator (701) is connected to the thrust loading mechanism (5), and the other end is connected to the engine frame (2). The plurality of servo actuators (701) are used to be driven individually to drive the thrust loading mechanism (5) to rotate so that a rotation angle is generated between the center line of the thrust loading mechanism (5) and the center line of the engine frame (2).

3. The tank and engine mount detection system according to claim 2, characterized in that: The thrust loading mechanism (5) comprises: A pressure seat (501) abuts against the center position of the bottom of the engine frame (2); A hydraulic cylinder (502) and a universal joint (503), wherein the bottom end of the universal joint (503) is connected to the end of the hydraulic rod of the hydraulic cylinder (502), and the top end of the universal joint (503) is connected to the bottom of the pressure seat (501); one end of the servo actuator (701) is connected to the hydraulic cylinder (502), and the servo actuator (701) is used to drive the thrust loading mechanism (5) to rotate with the universal joint (503) as the axis.

4. The tank and engine mount detection system according to claim 3, characterized in that: The servo actuator (701) comprises: a driving portion (7011) and a telescopic rod (7012), wherein the driving portion (7011) is used to adjust the length of the telescopic rod (7012); The engine frame (2) comprises a base frame (201) and brackets (202), one end of a plurality of brackets (202) is distributed around the base frame (201), the other end of the brackets (202) is against the rear bottom of the tank (1), and the ends of the plurality of telescopic rods (7012) are respectively mounted on the plurality of brackets (202).

5. The tank and engine mount detection system according to claim 4, characterized in that: The bottom ends of the plurality of brackets (202) are respectively connected to the diagonal corners of the base frame, and each bracket (202) is provided with two clamping arms (2021) arranged at an angle, and the ends of the clamping arms (2021) are used to cooperate with the rear bottom of the storage tank (1).

6. The tank and engine mount detection system according to claim 1, characterized in that: The liquid nitrogen adding and discharging mechanism (3) further comprises: A discharge pipe (303) connected to the filling pipe (301); a switching valve (304) provided at the connection point between the discharge pipe (303) and the filling pipe (301); A hydraulic pressure sensor (305), wherein a measuring point of the hydraulic pressure sensor (305) is located inside the liquid nitrogen adding and discharging mechanism (3).

7. The tank and engine mount detection system according to claim 1, characterized in that: Also includes: A safety mechanism (8) is located at the vent of the tank (1); The safety mechanism (8) comprises: an exhaust pipe (802) connected to the storage tank (1) and provided with an exhaust valve and a safety valve; a pressure sensor (801), the pressure sensor (801) being used to detect the pressure in the storage tank (1); The three-way valve (803) is respectively connected to the pressurized air pipe (401), the vent and the exhaust pipe (802).

8. The tank and engine mount detection system according to claim 1, characterized in that: The front short shell surface of the tank (1) has a front short shell measuring point (6011), the rear short shell surface of the tank (1) has a rear short shell measuring point (6012), and the surface of the engine frame has a frame measuring point (6013), and the temperature detection element (601) is respectively connected to the front short shell measuring point (6011), the rear short shell measuring point (6012) and the frame measuring point (6013).

9. A method for detecting a tank and an engine frame, characterized in that: A detection system for a tank (1) and an engine mount (2) as claimed in any one of claims 1 to 8, comprising: The liquid nitrogen adding and discharging mechanism (3) is used to inject liquid nitrogen into the storage tank (1) to a preset height, and the pressurizing mechanism (4) injects gas into the storage tank (1) to a preset pressure value, and maintains the pressure value for a preset time; The temperature detection element (601) acquires the surface temperature of the storage tank (1), and the strain detection element (602) acquires data on the surface strain of the storage tank (1).

10. The method for detecting a tank and an engine mount according to claim 9, characterized in that: The liquid nitrogen adding and discharging mechanism (3) injects liquid nitrogen into the storage tank (1) to a preset height, and the pressurizing mechanism (4) injects gas into the storage tank (1) to a preset pressure value. After the pressure value is maintained for a preset time, the process further comprises: The thrust loading mechanism (5) applies thrust to the bottom center position of the engine frame (2); Recording thrust data of the thrust loading mechanism (5); The acquisition mechanism (6) acquires data on the surface temperature and strain of the engine frame (2).

11. The method for detecting a tank and an engine mount according to claim 10, characterized in that: After the thrust loading mechanism (5) applies thrust to the bottom center position of the engine frame (2), it also includes: The thrust loading mechanism (5) applies thrust to a preset value, and the plurality of servo actuators (701) extend and retract, causing the thrust loading mechanism (5) to deflect; The angular direction and angular value between the thrust applied by the thrust loading mechanism (5) and the center line of the engine frame (2) are recorded.

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