A submerged jet and mechanical impact synergistic ice damage test device

Abstract

The application provides a submerged jet and mechanical impact synergistic ice damage test device, which comprises an ice material clamping system, a visible temperature control submerged cavity, a mechanical motion control system and a multi-nozzle jetting system; the mechanical motion control system comprises a servo electric cylinder and a servo motor control system; the servo motor control system comprises a programmable logic controller, and the programmable logic controller is internally provided with mechanical motion control system logic instructions for controlling the switching of the impact head to a single output mode, a reciprocating output mode and the execution of a return to the original point, limit protection and a timing trigger function; the multi-nozzle jetting system comprises a high-pressure water pump, a water supply tank, a target distance adjusting support frame, a multi-nozzle jetting coordination cavity and a jetting nozzle, and the control system of the high-pressure water pump is connected to the programmable logic controller to form a synergistic control system with the mechanical motion control system. The application can realize jetting damage and mechanical impact synergistic ice damage test by combining the advantages of mechanical impact and high-pressure water jetting in terms of impact and ablation of ice materials.

Description

Technical Field

[0001] This application relates to the field of ice damage testing technology, and in particular to a device for testing ice damage using a combination of submerged jet and mechanical impact. Background Technology

[0002] Ice material damage is a current hot topic in scientific research. The safety and controllability of ice damage from single mechanical impacts face serious challenges. To improve ice damage efficiency, it is necessary to study composite ice damage methods. Experimentation is an important means of studying ice damage mechanisms. Currently, there is no experimental device for studying the combined effects of submerged jet and mechanical impact on ice damage. Therefore, a device is needed to conduct ice damage experiments to carry out research on the combined effects of submerged jet and mechanical impact on ice damage. Summary of the Invention

[0003] To provide experimental conditions for conducting theoretical research on ice damage and to promote the engineering application of the submerged jet combined with mechanical impact ice damage method, this application provides a submerged jet and mechanical impact combined ice damage test device.

[0004] The ice damage testing device combining submerged jet and mechanical impact provided in this application adopts the following technical solution:

[0005] A device for testing ice damage by combining submerged jet and mechanical impact includes an ice material clamping system, a visual temperature-controlled submerged chamber, a mechanical motion control system, and a multi-nozzle spraying system.

[0006] The visible temperature-controlled flooding chamber includes a flooding chamber body and an electrical installation platform, and the ice material clamping system is mounted and fixed in the flooding chamber.

[0007] The mechanical motion control system includes a servo electric cylinder and a servo motor control system fixed to the flange of the lower plate of the submerged cavity. The push rod of the servo electric cylinder is connected from bottom to top to a push rod transition joint, a sensor pad, a load force sensor, a sensor connection pressure block, and an impact head. The servo motor control system includes a servo motor, a servo controller, and a programmable logic controller. The programmable logic controller has built-in mechanical motion control system logic instructions, which are used to control the impact head to switch between single output mode and reciprocating output mode, as well as to perform return to origin, limit protection, and timed triggering functions.

[0008] The multi-nozzle jetting system includes a high-pressure water pump, a water supply tank, a target distance adjustment support frame, a multi-nozzle jetting coordination chamber, and multiple jet nozzles. The control system of the high-pressure water pump is connected to a programmable logic controller, forming a collaborative control system with the mechanical motion control system.

[0009] Furthermore, the single-output mode refers to the impact head being controlled to perform one impact damage on the ice material, with the mechanical impact output speed and upper limit of the output force preset in advance, and the impact head contacting and damaging the ice material at a constant speed.

[0010] If the upper protection limit is reached within the upper limit of output, the damage is considered successful.

[0011] If the upper limit of output force is reached during the constant-speed contact with the ice material to damage it, and the output speed is reduced to zero while maintaining a constant output force, then the damage is considered unsuccessful.

[0012] Furthermore, the reciprocating output mode refers to the impact head being controlled to repeatedly impact and damage the difficult-to-damage ice material. After the constant speed of contact damage to the ice material reaches the upper limit of the output force, the constant output force is maintained for a preset period of time.

[0013] If the upper protection limit is reached within the upper limit of output, the damage is considered successful.

[0014] If the execution speed remains at zero within the preset time range, the damage is considered unsuccessful, and a second impact damage preparation action is performed according to the preset return distance, where the number of round-trip impacts can be preset.

[0015] Furthermore, the servo motor has a built-in encoder, speed observer, and torque sensor; the servo controller is used to control the servo motor to complete accurate position, speed, and torque commands. The encoder, speed observer, and torque sensor built into the servo motor feed back the position, speed, and torque to the servo controller to achieve precise closed-loop control, thereby controlling the servo electric cylinder to complete precise ice damage motion control.

[0016] Furthermore, the side of the multi-nozzle injection coordination chamber is provided with multiple unclogging connectors at different positions.

[0017] Furthermore, the submerged cavity includes four transparent acrylic glass panels that surround the square frame and can be detachably installed on the square frame. The submerged cavity is provided with a low-pressure water inlet, an overflow outlet, a bottom drain outlet, an electric cylinder push rod inlet, and a jet power water inlet. The low-pressure water inlet and the bottom drain outlet are equipped with valves with controllable opening, which are connected to a temperature sensor installed in the submerged cavity.

[0018] When the temperature sensor detects that the water temperature in the submerged chamber is higher than the predetermined temperature, the valves on the drain outlet and the low-pressure inlet are opened in a controlled manner, and low-temperature water is added through the low-pressure inlet to meet the test temperature requirements.

[0019] Furthermore, the ice material clamping system includes:

[0020] The ice table pressure plate and the ice table base plate are set in parallel, and both have a notch in the middle.

[0021] The fixing screws and hexagonal nuts are provided in at least four sets for fixing the ice table pressure plate and the ice table base plate that are set at intervals.

[0022] Furthermore, the ice table base plate is provided with two positioning blocks arranged on both sides of the notch on the ice table base plate near the ice table pressure plate. The two positioning blocks are provided with arc grooves on the side that is close to each other. The ice material to be tested is installed in the space enclosed by the two arc grooves.

[0023] Furthermore, it also includes:

[0024] Multiple variable diameter washers are provided, specifically concentric stepped frustums, each with a notch in the center, to accommodate ice materials of different sizes to be tested.

[0025] Furthermore, it also includes:

[0026] The lugs are fixed to the four corners of the ice platform base plate.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. This invention combines the advantages of mechanical impact and high-pressure water jet in impacting and melting ice materials, enabling a combined jet-induced mechanical impact and ice damage test;

[0029] 2. In this invention, the ice material clamping system can be adjusted according to the size of the test ice material, and can clamp ice materials of different thicknesses and diameters, which can meet the ice damage test under different scaling ratios;

[0030] 3. In this invention, the visual temperature-controlled submersion chamber adopts a water-electricity separation double-layer frame structure design, which not only meets the requirements of the simulated submersion environment, but also provides favorable space for the installation of the servo electric cylinder, thereby improving the stability and compatibility of the test device.

[0031] 4. In this invention, the visual temperature-controlled submersion chamber is made of detachable acrylic glass and has reserved a window for visual monitoring of jets and motion; and the visual temperature-controlled submersion chamber is designed with multiple water supply and drainage interfaces and overflow outlets, realizing ice-water level control and temperature-controlled replenishment of low-temperature water sources in the submersion environment.

[0032] 5. In this invention, the mechanical motion control system adopts a precise closed-loop control strategy, which can complete the precise ice damage motion control while feeding back position, speed, and load information. It also has built-in impact mode logic judgment and can complete various ice damage tests.

[0033] 6. In this invention, the connection between the high-pressure water pump and its control system and the mechanical motion control system is coordinated, realizing the function of jet damage and mechanical impact combined with ice damage. The designed control system is safe and reliable, and the designed multi-nozzle jet coordination cavity has the function of target distance and nozzle expansion. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall device according to an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the ice material clamping system in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the visible temperature-controlled submersion cavity structure in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the mechanical motion control system structure in an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the mechanical motion control system architecture in an embodiment of this application;

[0040] Figure 6 This is a schematic diagram of the multi-nozzle injection system structure in an embodiment of this application;

[0041] Figure 7 This is a schematic diagram of the multi-nozzle injection coordination chamber structure in an embodiment of this application;

[0042] Figure 8 This is a flowchart of the control logic of the ice damage test device for combined submerged jet and mechanical impact in the embodiments of this application.

[0043] Figure label:

[0044] 1. Ice material clamping system; 1a. Ice table pressure plate; 1b. Ice table base plate; 1c. Fixing screw; 1d. Hexagonal nut; 1e. Positioning block; 1f. Lifting lug; 1g. Variable diameter washer;

[0045] 2. Visual temperature-controlled submersion chamber; 2a. Transparent acrylic glass plate; 2b. Glass sealing frame; 2c. Low-pressure water inlet; 2d. Overflow outlet; 2e. Bottom drain outlet; 2f. Electric cylinder push rod inlet; 2g. Jet-driven water inlet; 2h. Overflow pipe groove; 2i. Lifting and fixing block;

[0046] 3. Mechanical motion control system; 3a. Servo electric cylinder; 3b. Cylinder liner retaining ring; 3c. Push rod waterproof joint; 3d. Push rod transition joint; 3e. Sensor pad; 3f. Load force sensor; 3g. Sensor connecting pressure block; 3h. Impact head;

[0047] 4. Multi-nozzle injection system; 4a. Multi-nozzle injection coordination chamber; 4b. High-pressure water pump; 4c. Water supply tank; 4d. Target distance adjustment support frame; 4e. High-pressure water interface; 4f. Unblocking connector; 4g. Jet nozzle. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] Reference Figure 1 This application discloses a device for testing ice damage by combining submerged jet and mechanical impact, which includes an ice material clamping system 1, a visual temperature-controlled submerged cavity 2, a mechanical motion control system 3, and a multi-nozzle spraying system 4.

[0050] like Figure 2 As shown, the ice material clamping system 1 is mainly composed of an ice table pressure plate 1a and an ice table base plate 1b clamping each other. The ice table pressure plate 1a and the ice table base plate 1b are pre-tightened and fixed by four sets of fixing screws 1c and hexagonal nuts 1d. Furthermore, the upper surface of the ice table pressure plate 1a is reinforced with ribs to enhance the rigidity of the plate. On the side of the ice table base plate 1b closest to the ice table pressure plate 1a, there are two positioning blocks 1e arranged on both sides of the notch in the ice table base plate 1b. The side of the two positioning blocks 1e that are close to each other is provided with an arc groove. The ice material to be tested is installed in the circular space enclosed by the two arc grooves. Lifting lugs 1f are also provided at the four corners of the ice table base plate 1b.

[0051] Before clamping the ice material, the ice platform pressure plate 1a is separated from the ice platform base plate 1b by disassembling the hexagonal nut 1d. The ice material is then placed in the circular space between the two positioning blocks 1e on the ice platform base plate 1b. After the ice material is clamped, a crane and strap hooks can be used to pass through the lifting lug 1f to achieve rapid loading and transfer of large ice materials. In addition, to cope with ice damage tests under different scaling requirements, the diameter of the ice sample can be changed by adding a concentric stepped frustum-shaped variable diameter washer 1g.

[0052] like Figure 3As shown, the visual temperature-controlled submersion chamber 2 is an integrated double-layer frame, with the upper layer being the submersion chamber body and the lower layer being the electrical installation platform. The top of the upper submersion chamber body is open, and positioning holes are provided at the four corners for positioning and connecting the ice material clamping system 1. The four sides of the submersion chamber body are made of removable acrylic glass 2a, which is sealed to the square frame with a glass sealing frame 2b and hexagonal quick-release bolts, providing a clear view and also allowing for supplementary lighting for backlit photography of the ice material.

[0053] The submerged cavity is equipped with a low-pressure water inlet 2c, an overflow trough 2d, a lower drain outlet 2e, an electric cylinder push rod inlet 2f, and a jet-powered water inlet 2g, for low-pressure water replenishment, high-pressure water supply, and overflow drainage. An overflow pipe trough 2h is connected to the outside of the overflow trough 2d. During overflow drainage, water enters the overflow trough 2d, flows through the overflow pipe trough 2h, and is discharged.

[0054] The low-pressure inlet 2c and the lower outlet 2e are equipped with valves with controllable opening. Combined with the temperature sensor inside the submerged chamber, the water temperature inside the submerged chamber can be controlled. In specific operation, low-temperature water is injected into the submerged chamber through the low-pressure inlet 2c. When the injected liquid surface comes into contact with the ice material surface, excess water enters the overflow outlet 2d and flows through the overflow pipe 2h before being discharged. The overflow process of the jet high-pressure water entering the submerged chamber is similar. When the temperature sensor detects that the water temperature inside the submerged chamber is higher than the predetermined temperature, the lower outlet 2e valve can be opened to replenish low-temperature water through the low-pressure inlet 2c to meet the test temperature requirements.

[0055] like Figure 4 As shown, the main body of the mechanical motion control system 3 is a high-precision, high-thrust, high-speed servo electric cylinder 3a, which is connected to the bottom plate flange of the integrated double-layer frame structure by a high-power servo motor, reducer and electric cylinder barrel through a folding method. The top of the cylinder liner is connected to the bottom plate flange of the submerged cavity through a square cylinder liner fixing ring 3b. The push rod joint is a threaded male joint, which is used to install the impact head 3h.

[0056] The push rod connector of the servo electric cylinder 3a passes through the electric cylinder push rod inlet 2f and enters the submerged chamber. A push rod waterproof connector 3c is installed between them to isolate the lower electromechanical parts from the water in the submerged chamber, ensuring the stable performance of the electric cylinder motor. A transition structure is provided between the push rod connector and the impact head 3h. The transition structure, from bottom to top, consists of a push rod transition connector 3d, a sensor pad 3e, a load force sensor 3f, and a sensor connecting pressure block 3g. The push rod transition connector 3d is threaded to the push rod structure for easy overall disassembly. The upper part of the sensor connecting pressure block 3g has a square groove structure that can be vertically inserted and a horizontal through hole for installing and fixing different impact heads 3h.

[0057] The push rod transition joint 3d, sensor pad 3e, load force sensor 3f, and sensor connecting pressure block 3g are fastened together by internal hex bolts. The load force sensor 3f has a conventional circular through hole in the middle. The sensor connecting pressure block 3g and the sensor pad 3e have convex and convex cylindrical positioning blocks, respectively. On the one hand, this facilitates the positioning of the sensor connecting pressure block 3g, load force sensor 3f, and sensor pad 3e during installation; on the other hand, it improves the overall rigidity of the push rod and reduces the eccentric effect.

[0058] like Figure 5 As shown, the servo motor control system includes a servo motor, a servo controller, and a programmable logic controller. The servo motor has a built-in encoder, speed observer, and torque sensor. The servo controller is used to control the servo motor to complete accurate position, speed, and torque commands. The encoder, speed observer, and torque sensor built into the servo motor feed back the position, speed, and torque to the servo controller to achieve precise closed-loop control, thereby controlling the servo electric cylinder 3a to complete precise ice damage motion control.

[0059] The programmable logic controller (PLC) incorporates built-in mechanical motion control system logic instructions, including functions such as return to origin, limit protection, and timed triggering. It can switch between single-output and reciprocating output modes depending on the actual scenario. Specifically, the return to origin and limit protection functions ensure consistent motion and system safety during repeated tests. The timed triggering function is primarily used for motion control of mechanical impact-induced jet ice damage. It allows setting the time interval for mechanical motion triggering during the jet damage process, including triggering during and after the jet damage.

[0060] In single-output mode, the impact head 3h performs one impact damage on the ice material. The mechanical impact output speed and upper limit of the output force are set. The impact head 3h contacts the ice material at a constant speed. If the upper protection limit is reached within the upper limit of the output force, the damage is considered successful. If the upper limit of the output force is reached during the constant speed contact with the ice material, the output speed is reduced to zero and the constant output force is maintained, the damage is considered unsuccessful. The clock in the logic judgment starts timing. The timing jump time of this stage can be preset.

[0061] The reciprocating output mode refers to the impact head performing multiple reciprocating impacts on ice materials that are difficult to damage, which is different from the single output mode. After the constant speed contact damage to the ice material reaches the upper limit of the output force, the constant force output maintenance time of this stage can be preset. If the upper protection limit is reached within the upper limit of the output force, the damage is considered successful. If the execution speed is always zero within the preset time range, the damage is considered unsuccessful, and the second impact damage preparation action is performed according to the preset return distance. The number of reciprocating impacts can be preset.

[0062] like Figure 6 and Figure 7 As shown, the multi-nozzle injection system 4 comprises multiple jet nozzles 4g, a multi-nozzle injection coordination chamber 4a, a high-pressure water pump 4b and its control system, a water supply tank 4c, and a target distance adjustment support frame 4d. The high-pressure water pump 4b is connected to the water supply tank 4c via a low-pressure pipeline for water supply, and the high-pressure water pump 4b and the multi-nozzle injection coordination chamber 4a are connected via a high-pressure pipeline. The multi-nozzle injection coordination chamber 4a has multiple sets of injection points at different positions. Different types and sizes of jet nozzles 4g can be installed at these injection points as needed, compatible with convergent nozzles, cavitation nozzles, self-excited oscillating nozzles, and abrasive sand nozzles, etc. Sealing plugs can also be installed as needed. To minimize the limited space of the flooded chamber, if abrasive jets are used, the abrasive jet generation mode is pre-mixing.

[0063] Furthermore, in the control system of the high-pressure water pump 4b, the frequency converter controls the motor speed, thereby adjusting the flow rate of the high-pressure pump. The control of the frequency converter is connected to the aforementioned programmable logic controller, forming a cooperative control system with the mechanical motion control system 3, which can realize functions such as starting and stopping the high-pressure water pump 4b, flow control, timed triggering, safety protection, and cooperative damage control.

[0064] In operation, water is pressurized by a high-pressure water pump 4b and then enters the inner flow channel via a high-pressure pipeline connected to a high-pressure water interface 4e. It is then ejected at high speed from the jet nozzle 4g. Furthermore, considering that the inner flow channel of the multi-nozzle jet coordination chamber 4a may become clogged due to abrasive buildup, multiple unclogging connectors 4f are located at different positions on the side of the multi-nozzle jet coordination chamber 4a; when clogging occurs, the inner flow channel can be cleaned directly. The target distance adjustment support frame 4d is used to mount and fix the multi-nozzle jet coordination chamber 4a and adjust the jet target distance, balancing the jet reaction force of the jet nozzle 4g ​​during operation. Specifically, multiple spaced lifting and fixing blocks 2i are set within a square frame. By inserting the target distance adjustment support frame 4d into the gap between two adjacent lifting and fixing blocks 2i, the jet target distance can be adjusted.

[0065] In specific experiments, the control logic of the ice damage testing device combining submerged jet and mechanical impact is as follows: Figure 8As shown, after preparing the ice damage test prerequisites and setting parameters such as the mechanical impact mode, impact velocity, and output force, the first consideration is whether jet-assisted damage is needed. If not, the impact action is executed directly. If the test requires jet-assisted ice damage, the jet target distance, jet duration, and jet flow rate need to be determined. When performing jet pre-damage, it is possible to choose whether to trigger synchronously with the mechanical impact. If synchronously triggered, the impact action is performed simultaneously with the jet damage pre-damage; otherwise, a delay needs to be set according to the jet time. After the jet damage action is completed, the impact action is executed again. During the impact action, it is possible to perform multiple impacts according to the impact mode settings. If it is a single-execution mode, the test ends after the impact action is performed. If it is a multiple-execution mode, the degree of damage is judged in combination with the programming logic control strategy; if the damage is not complete, the impact action is repeated until the ice material is completely damaged and the test ends.

[0066] The working process and working principle of this invention are as follows:

[0067] The ice material is placed on the ice platform base plate 1b and pressed down by the ice platform pressure plate 1a. The fixing screw 1c and hexagonal nut 1d clamp and fix them to the ice material. The whole assembly is placed on the water-filled, visible temperature-controlled submerged chamber 2. After inputting the test parameters, the system selects whether to use the multi-nozzle spray system 4 to pre-damage the ice layer. Then, according to the parameters and mode settings, the mechanical motion control system 3 is triggered to impact the ice layer with a preset action pattern. Through the above process, the entire process of jet-coordinated mechanical fine impact on ice damage is simulated.

[0068] This invention features a modular design for each system, organically combining a jet-effect synergistic mechanical impact ice damage system. It can meet a wide range of experimental parameter settings, offers a wealth of adjustable variables, and collects detailed information, effectively improving the research efficiency of the synergistic ice damage mechanism of submerged jet and mechanical impact.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test apparatus for ice damage caused by a combined submerged jet and mechanical impact, characterized in that, This includes an ice material clamping system, a visual temperature-controlled submersion chamber, a mechanical motion control system, and a multi-nozzle injection system; The visible temperature-controlled flooding chamber includes a flooding chamber body and an electrical installation platform, and the ice material clamping system is mounted and fixed in the flooding chamber. The mechanical motion control system includes a servo electric cylinder and a servo motor control system fixed to the flange of the lower plate of the submerged cavity. The push rod of the servo electric cylinder is connected from bottom to top to a push rod transition joint, a sensor pad, a load force sensor, a sensor connection pressure block, and an impact head. The servo motor control system includes a servo motor, a servo controller, and a programmable logic controller. The programmable logic controller has built-in mechanical motion control system logic instructions, which are used to control the impact head to switch between single output mode and reciprocating output mode, as well as to perform return to origin, limit protection, and timed triggering functions. The multi-nozzle jetting system includes a high-pressure water pump, a water supply tank, a target distance adjustment support frame, a multi-nozzle jetting coordination chamber, and multiple jet nozzles. The control system of the high-pressure water pump is connected to a programmable logic controller, forming a collaborative control system with the mechanical motion control system.

2. The ice damage testing device combining submerged jet and mechanical impact according to claim 1, characterized in that, The single-output mode refers to the impact head being controlled to perform one impact damage on the ice material. The mechanical impact output speed and output force upper limit are preset, and the impact head contacts the damaged ice material at a constant speed. If the upper protection limit is reached within the upper limit of output, the damage is considered successful. If the upper limit of output force is reached during the constant-speed contact with the ice material to damage it, and the output speed is reduced to zero while maintaining a constant output force, then the damage is considered unsuccessful.

3. The ice damage testing device combining submerged jet and mechanical impact according to claim 1, characterized in that, The reciprocating output mode refers to the impact head being controlled to repeatedly impact and damage the difficult-to-damage ice material. After the constant speed of contact damage to the ice material reaches the upper limit of the output force, the constant output force is maintained for a preset period of time. If the upper protection limit is reached within the upper limit of output, the damage is considered successful. If the execution speed remains at zero within the preset time range, the damage is considered unsuccessful, and a second impact damage preparation action is performed according to the preset return distance, which also presets the number of round-trip impacts.

4. The ice damage testing device combining submerged jet and mechanical impact according to claim 1, characterized in that, The servo motor has a built-in encoder, speed observer, and torque sensor. The servo controller is used to control the servo motor to complete accurate position, speed, and torque commands. The encoder, speed observer, and torque sensor built into the servo motor feed back the position, speed, and torque to the servo controller to achieve precise closed-loop control, thereby controlling the servo electric cylinder to complete precise ice damage motion control.

5. The ice damage testing device combining submerged jet and mechanical impact according to claim 1, characterized in that, The multi-nozzle injection coordination chamber is provided with multiple unclogging connectors at different positions on its side.

6. A test apparatus for combined submerged jet and mechanical impact ice damage according to any one of claims 1-5, characterized in that, The submerged cavity includes four transparent acrylic glass panels that are enclosed on all four sides and can be detachably installed on a square frame. The submerged cavity is provided with a low-pressure water inlet, an overflow outlet, a bottom drain outlet, an electric cylinder push rod inlet, and a jet power water inlet. The low-pressure water inlet and the bottom drain outlet are equipped with valves with controllable opening, which are connected to a temperature sensor installed in the submerged cavity. When the temperature sensor detects that the water temperature in the submerged chamber is higher than the predetermined temperature, the valves on the drain outlet and the low-pressure inlet are opened in a controlled manner, and low-temperature water is added through the low-pressure inlet to meet the test temperature requirements.

7. A test apparatus for combined submerged jet and mechanical impact ice damage according to any one of claims 1-5, characterized in that, The ice material clamping system includes: The ice table pressure plate and the ice table base plate are set in parallel, and both have a notch in the middle. The fixing screws and hexagonal nuts are provided in at least four sets for fixing the ice table pressure plate and the ice table base plate that are set at intervals.

8. The ice damage testing device combining submerged jet and mechanical impact according to claim 7, characterized in that, Two positioning blocks are arranged on the side of the ice table base plate near the ice table pressure plate, on both sides of the notch in the ice table base plate. An arc groove is provided on the side of the two positioning blocks that are close to each other. The ice material to be tested is installed in the space enclosed by the two arc grooves.

9. The ice damage testing device combining submerged jet and mechanical impact according to claim 7, characterized in that, Also includes: Multiple variable diameter washers are provided, specifically concentric stepped frustums, each with a notch in the center, to accommodate ice materials of different sizes to be tested.

10. The ice damage testing device combining submerged jet and mechanical impact according to claim 7, characterized in that, Also includes: The lugs are fixed to the four corners of the ice platform base plate.

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