Test device and detection method for simulating floating ice impact wear behavior

Abstract

The invention provides a test device and a detection method for simulating a floating ice impact wear behavior, the test device comprises an ice water test box, a test sample plate fixing frame and a rotary power part, the ice water test box is used for placing a mixture of water and ice blocks, the test sample plate fixing frame is used for installing a test sample plate, and the rotary power part is used for rotating the test sample plate. The test sample plate can extend into the ice water test box, and the rotary power part is connected with the test sample plate fixing frame and used for driving the test sample plate to rotate. The test sample plate extends into the ice water test box and is stirred in an ice water mixture under the driving action of the rotary power part, and the relative movement of floating ice and the test sample plate is utilized, so that the floating ice and water continuously impact and wear the test sample plate, and the navigation condition of a ship in a floating ice environment is simulated; the test device for simulating the impact wear behavior of the floating ice in the laboratory is established, a reliable device is provided for researching the damage of the floating ice in the ice area to materials such as the surface and the coating of a ship body, the dependence of actual ship verification is reduced, the test period is effectively shortened, and the investment of manpower and material resources is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of indoor simulation devices for natural environment corrosion, and in particular to a test device and a detection method for simulating the impact and wear behavior of floating ice. Background Art

[0002] When ships sail in icy waters such as polar regions, the hull and coating will be impacted and worn by ice, which makes the hull coating more prone to cracking, rusting and falling off. Therefore, the damage and failure behavior of coatings in ice-floating environments is a matter of great concern. Since the performance changes of coatings in ice-floating environments are difficult to verify through actual ships, it is particularly important to establish a laboratory accelerated test device that simulates the impact and wear environment of floating ice.

[0003] In the prior art, the working condition simulation of the complex environment of the interaction of seawater and floating ice is carried out using a ship model in a large ice pool with ice freezing ability, which is mainly used for resistance test of ships sailing in ice areas. CN106394806A discloses a method for predicting the icebreaking resistance of ice-covered ships based on ice water pool tests. The method is based on the prediction of icebreaking resistance test of ice-covered ships during icebreaking in large ice pools. The method requires a large ice pool as an experimental site. At present, only Tianjin University, Shanghai Maritime University, and China Shipbuilding 702 Institute have large ice pools in my country. A large amount of ice is required during the test process, and the experimental cycle is long and the cost is high. Therefore, the test method based on the ice pool to simulate the floating ice environment in the ice area is not suitable for laboratory performance evaluation of coating materials that require a large number of tests and rapid evaluation of test results. CN220438068U discloses an ice water impact test box, which performs ice water impact on test samples through an ice water impact spray component. The floating ice content of the device is low and does not have the effect of ice layer wear. Summary of the invention

[0004] In view of this, the present invention aims to propose a test device and a detection method for simulating the impact and wear behavior of floating ice, so as to solve the problem that the existing technology needs to rely on a large ice pool when conducting tests, or cannot simulate the impact and wear behavior of floating ice well.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] On the one hand, the present invention proposes a test device for simulating the impact and wear behavior of floating ice, the test device includes an ice water test box, a test sample fixing frame and a rotating power unit, the ice water test box is used to place a mixture of water and ice cubes, the test sample fixing frame is used to install the test sample, the test sample can be inserted into the ice water test box, and the rotating power unit is connected to the test sample fixing frame to drive the test sample to rotate. The test sample is inserted into the ice water test box and stirred in the ice water mixture under the driving action of the rotating power unit. The relative movement of the floating ice and the test sample is used, and the floating ice and water continuously impact and wear the test sample to simulate the navigation of the ship in the floating ice environment. A laboratory test device for simulating the impact and wear behavior of floating ice is established, which provides a reliable device for studying the damage of floating ice in ice areas to the surface of the hull and coating materials, reduces the dependence on actual ship verification, and effectively shortens the test cycle and reduces the investment in manpower and material resources.

[0007] Furthermore, the test sample fixing frame includes test samples arranged at multiple angles, and the installation angle of the test samples is 0 to 90 degrees. The test samples have different installation inclination angles, and can simulate wear and / or impact according to the angle conditions.

[0008] Furthermore, the test sample fixing frame includes a polyhedral mounting portion and a mounting groove provided on the mounting portion, the mounting groove is connected to the test sample, and the mounting groove has different inclination angles. The mounting groove can not only play the role of installing the test sample, but also can make the test sample have different installation angles by using its own inclination angle. The mounting portion with a polyhedral structure can increase the number of mounting grooves, so that multiple test samples are distributed on the test sample fixing frame to fully simulate the floating ice environment in different ice areas.

[0009] Furthermore, the test device includes a resistance sensor, which is connected to the test sample. The resistance sensor is used to sense and obtain the torque of the floating ice layer acting on the test sample during the rotation process, and finally convert it into rotational resistance in combination with the torque during the rotation of the test sample, and monitor the change of the floating ice content in the ice water test box according to the change of the rotational resistance.

[0010] Furthermore, the ice water test box is provided with a controller, and the controller is used to control the temperature in the ice water test box to be maintained at -5±0.5°C. The purpose of maintaining the temperature at -5±0.5°C is to maintain a low temperature environment, prevent ice cubes from melting into water, and ensure that there is always an ice-water mixture in the ice water test box to better fit the floating ice environment.

[0011] Furthermore, the test sample fixing frame includes a telescopic shaft and a first bracket, one end of the telescopic shaft is connected to the rotating power unit, and the other end is connected to the test sample. The telescopic shaft can be extended in the up and down directions to adjust the depth of the test sample extending into the floating ice layer.

[0012] Furthermore, the bracket includes a support plate and a column arranged below the support plate, the column is vertically arranged on the upper surface of the ice water test box, the telescopic shaft is connected to the support plate, and the rotating power unit and the resistance sensor are arranged above the support plate.

[0013] Furthermore, the ice blocks have different shapes. By coordinating with other parameters, the impact and wear damage behavior of the ice layer on the hull and coating of the ship during navigation in the ice area can be simulated.

[0014] On the other hand, the present invention also proposes a detection method, which uses the above-mentioned floating ice impact wear behavior test device to detect the damage of the floating ice environment ice layer to the hull and coating under laboratory conditions. The detection method includes the following steps:

[0015] Step 1: Raise the test sample fixing frame, install the test sample in the installation slot of the test sample fixing frame, and lower the test sample fixing frame to make the test sample completely immersed in the ice-water mixture of the ice-water test chamber;

[0016] Step 2: Set the rotation speed, rotation time, temperature in the ice water test chamber, volume content of floating ice, and shape of floating ice of the rotating power unit;

[0017] Step 3: The resistance sensor obtains the rotation resistance F0 at the initial moment;

[0018] Step 4: The resistance sensor obtains the current rotation resistance Ft in real time, and determines whether F0-Ft≥A. If not, execute step 6;

[0019] Step 5: If yes, add ice cubes to the ice water test box and return to step 4;

[0020] Step 6: Determine whether the rotation time of the rotating power unit reaches the preset rotation time. If so, the test device stops working. If not, return to step 4.

[0021] Compared with the prior art, the test device and detection method for simulating the impact wear behavior of floating ice described in the present invention have the following advantages:

[0022] (1) By utilizing the relative motion between floating ice and the test specimen, the floating ice and water continuously impact and wear the test specimen to simulate the navigation of a ship in a floating ice environment. A laboratory test device for simulating the impact and wear behavior of floating ice is established. This provides a reliable device for studying the damage of floating ice in ice areas to the hull surface and coatings and other materials, reduces the dependence on actual ship verification, effectively shortens the test cycle, and reduces the investment in manpower and material resources.

[0023] (2) By adjusting and combining test parameters such as the installation angle of the test specimen, the content of floating ice, the rotation speed of the rotating power unit, and the shape of floating ice, the impact and wear damage behavior of the ice layer on the hull and coating during the ship's navigation in ice areas can be accurately simulated.

[0024] (3) The present invention has the characteristics of laboratory scene simulation, controllable parameters, data collection, safety and reliability, and easy detection. It also has fast and efficient detection and accurate evaluation. It has guiding significance for theoretical research and helps to develop new ice-resistant coating materials, thereby improving the corrosion protection performance and effectiveness of coating materials for ships sailing in ice areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic structural diagram of a test device for simulating the impact and wear behavior of floating ice according to the present invention;

[0027] Figure 2 Schematic diagram of different shapes of ice cubes;

[0028] Figure 3 This is a surface appearance diagram of the coating of Example 1 of the present invention;

[0029] Figure 4 This is a surface appearance diagram of the coating of Example 2 of the present invention;

[0030] Figure 5 This is a surface appearance diagram of the coating of Example 3 of the present invention;

[0031] Figure 6 This is a diagram of the coating surface appearance of Example 4 of the present invention.

[0032] Description of reference numerals:

[0033] 1. Ice water test chamber; 2. Test sample fixing frame; 3. Rotating power unit; 4. Test sample; 5. Resistance sensor; 6. Telescopic shaft; 7. Bracket; 8. Support plate; 9. Column; 10. Human-machine dialogue window; 11. Installation slot. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The embodiments described in the present invention are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] like Figure 1 As shown, a test device for simulating the impact and wear behavior of floating ice of the present invention comprises an ice water test box 1, a test sample fixing frame 2 and a rotating power unit 3. The ice water test box 1 is used to place a mixture of water and ice cubes, the test sample fixing frame 2 is used to install a test sample 4, and the test sample 4 can be inserted into the ice water test box 1. The rotating power unit 3 is connected to the test sample fixing frame 2 and is used to drive the test sample 4 to rotate. The test sample 4 is inserted into the ice water test box 1 and stirred in the ice water mixture under the driving action of the rotating power unit 3. The floating ice and water continuously impact and wear the test sample 4 by using the relative movement of the floating ice and the test sample 4 to simulate the navigation of the ship in the floating ice environment. A test device for simulating the impact and wear behavior of floating ice for laboratory use is established, which provides a reliable device for studying the damage of floating ice in ice areas to the surface of the hull and materials such as coatings, reduces the dependence on actual ship verification, and effectively shortens the test cycle and reduces the investment of manpower and material resources.

[0037] Furthermore, the water is a 0% to 5% sodium chloride solution, which is used to form salt water to simulate the seawater corrosion environment. The freezing point of the salt water is ≤-5°C.

[0038] The test sample fixing frame 2 includes a test sample 4 set at multiple angles, and the installation angle of the test sample 4 is 0 to 90°. The test sample 4 has different installation inclination angles, and can simulate wear and / or impact according to the angle conditions. When a ship is sailing in an ice floe area, the waterline part of the hull will be impacted by the ice layer, of which the bow part is mainly impacted vertically by the ice layer, and the middle part of the hull is mainly worn parallel to the ice layer. In the design of the installation angle of the test sample 4, the present application simulates the impact or wear caused by the ice layer from the bow to the middle of the hull by setting the angle (0° to 90°) between the test surface of the test sample 4 and the rotating section of the ice floe. Specifically, when the angle between the test sample 4 and the rotating section of the floating ice is 90°, the impact of the ice layer on the bow is mainly simulated; when the angle between the test sample 4 and the rotating section of the floating ice is 0°, the wear of the ice layer on the middle of the hull is mainly simulated; when the angle between the test sample 4 and the rotating section of the floating ice is between 0° and 90°, the coupling of the impact and wear of the ice layer and the change of the intensity of the action are realized. Under the cooperation of the rotation drive action, the floating ice environment in different ice areas can be simulated by combining with different angles. The installation angle described in this application refers to the angle between the test sample 4 and the horizontal plane.

[0039] As a preferred example of the present invention, the test sample fixing frame 2 includes a polyhedral mounting portion and a mounting groove 11 provided on the mounting portion, wherein the mounting groove 11 is connected to the test sample 4, and the mounting groove 11 has different inclination angles. The mounting groove 11 can not only play the role of mounting the test sample 4, but also can make the test sample 4 have different mounting angles by utilizing its own inclination angle. The mounting portion with a polyhedral structure can increase the number of mounting grooves 11, thereby distributing multiple test samples 4 on the test sample fixing frame 2 to fully simulate the floating ice environment in different ice areas.

[0040] In the present invention, the shape, size and number of the test sample 4 are not specifically limited. Taking into account the convenience of installation and testing of the test sample 4, the size of the test sample 4 is 150mm (length) × 75mm (width) × (3~5)mm (height). The material of the test sample 4 is the material used for the hull and has a coating. The rotating power unit 3 of the present invention is a motor, and the speed of the motor driving the test sample 4 to rotate is 10r / min~800r / min. Combined with the size of the test sample 4, the linear velocity at the center line of the test sample 4 can be calculated to be 0.5m / s~35m / s. The maximum sailing speed of a ship in an ice floe area is generally 3m / s, so the speed set by the present invention matches the actual sailing speed of the ship. The change in the force of the floating ice layer on the hull and the coating is simulated by adjusting the motor speed.

[0041] The test device includes a resistance sensor 5, which is connected to the test sample 4. The resistance sensor 5 is used to sense and obtain the torque of the floating ice layer acting on the test sample 4 during the rotation process, and finally convert it into rotation resistance in combination with the torque during the rotation of the test sample 4, and monitor the change of the floating ice content in the ice water test box 1 according to the change of the rotation resistance.

[0042] Considering that the actual ship is sailing in the large environment of icy seas, the floating ice changes and fluctuates slightly, and the volume of the test device used under laboratory conditions is limited. The test sample 4 will cause the floating ice to break and generate heat exchange during rotation, affecting the floating ice content in the ice water test box 1. The present invention sets a resistance sensor 5 and uses the acquired rotation resistance to monitor the floating ice content in real time. When the real-time rotation resistance Ft is less than the initial moment rotation resistance F0, it means that the amount of floating ice is reduced, reminding the operator to replenish ice cubes in time. Using the resistance sensor 5 to replenish ice cubes in time to stabilize the floating ice content is conducive to the test device of the present invention for simulating the impact wear behavior of floating ice to be closer to the actual icy sea conditions and improve the simulation accuracy.

[0043] As a preferred example of the present invention, the ice water test box 1 is provided with a controller, and the controller is used to control the temperature in the ice water test box 1 to maintain at -5±0.5°C. The ice water test box 1 contains ice cubes and an aqueous solution with antifreeze added, and the volume content of ice cubes is 0-50%. The purpose of adding antifreeze is to prevent water from freezing, and the purpose of keeping the temperature at -5±0.5°C is to maintain a low temperature environment, prevent ice cubes from melting into water, and ensure that there is always an ice-water mixture in the ice water test box 1 to better fit the floating ice environment. Among them, the characteristics of the floating ice and the amount of ice added can be customized according to the test requirements. Figure 2 As shown, the mold is used to prepare ice cubes of different shapes, such as triangle, square, circle, star and other complex shapes. Specifically, the antifreeze agent is any one of ethylene glycol and propylene glycol, and the amount of the antifreeze agent added is 1% to 15%.

[0044] Furthermore, the test sample fixing frame 2 includes a telescopic shaft 6 and a first bracket 7, one end of the telescopic shaft 6 is connected to the rotating power unit 3, and the other end is connected to the test sample 4. The telescopic shaft 6 can be extended and retracted in the up and down directions, thereby adjusting the depth of the test sample 4 extending into the floating ice layer.

[0045] The bracket 7 includes a support plate 8 and a column 9 disposed below the support plate 8, the column 9 is vertically disposed on the upper surface of the ice water test box 1, the telescopic shaft 6 is connected to the support plate 8, and the rotary power unit 3 and the resistance sensor 5 are disposed above the support plate 8. The support plate 8 is used to provide an installation site for the telescopic shaft 6, and the bracket 7 is used to reduce the shaking of the test sample 4 under the impact and wear of floating ice, thereby improving the overall stability of the test device.

[0046] In order to facilitate the operation of the test device, the test device includes a lifting button, a parameter setting interface and a human-machine dialogue window 10. The lifting button is operated to adjust the lifting height of the test sample fixing frame 2. The parameter setting interface is used to set the speed, rotation time and temperature of the rotating power unit 3 and the ice water test box 1. The human-machine dialogue window 10 facilitates the user to operate the test device.

[0047] The present invention also proposes a detection method, which uses the above-mentioned floating ice impact wear behavior test device to detect the damage of the floating ice environment ice layer to the hull and coating under laboratory conditions. The detection method includes the following steps:

[0048] Step 1: Raise the test sample fixing frame 2, install the test sample 4 in the installation groove 11 of the test sample fixing frame 2, and lower the test sample fixing frame 2 so that the test sample 4 is completely immersed in the ice-water mixture of the ice-water test box 1;

[0049] Step 2: setting the rotation speed, rotation time of the rotating power unit 3, the temperature in the ice water test box 1, the volume content of floating ice, and the shape of floating ice;

[0050] Step 3, the resistance sensor 5 obtains the rotation resistance F0 at the initial moment;

[0051] Step 4: The resistance sensor 5 obtains the current rotation resistance Ft in real time, and determines whether F0-Ft≥A. If not, execute step 6;

[0052] Step 5: If yes, add ice cubes to the ice water test box 1 and return to step 4;

[0053] Step 6: Determine whether the rotation time of the rotating power unit 3 reaches the preset rotation time. If yes, the testing device stops working. If no, return to step 4.

[0054] Specifically, in step 4, the value of A is set according to the experience of those skilled in the art.

[0055] The present invention provides a test device and detection method for simulating the impact wear behavior of floating ice. Under laboratory conditions, an ice-water test box 1 is used to provide an ice-water mixture and environmental control of the ice-water mixture, and the impact wear behavior of the ice layer in the floating ice environment is fully simulated by the rotation method, so as to provide a laboratory simulation acceleration test device for studying the damage of the floating ice environment to the hull surface and coating materials. At the same time, the simulation of the floating ice environment in different ice areas can be achieved by controlling the rotation speed, rotation time, multi-angle adjustment of the test sample 4 and other parameters of the rotating power unit 3.

[0056] The present invention is described in detail below with reference to the embodiments. In embodiments 1 to 4, different floating ice volume contents, installation angles of the test sample 4, rotation speeds and rotation times of the rotating power unit 3 are set respectively, as shown in Table 1. All of the embodiments 1 to 4 are carried out in a low temperature environment of -5°C in the ice water test box 1, and the number of the test samples 4 is 4.

[0057] Table 1

[0058]

[0059] The detection method of the test device for simulating the impact wear behavior of floating ice in the present application comprises the following steps:

[0060] Step 1: Start the lifting button to raise the test sample holder 2, install the test sample 4 according to the installation angle of the test sample 4 in Table 1, and start the lifting button again to lower the test sample holder 2, and completely immerse the test sample 4 in the ice-water mixture of the ice-water test box 1;

[0061] Step 2: In the parameter setting interface, set the parameters according to the rotation speed, rotation time, and temperature in the ice water test box 1 in Table 1, and set the ice water mixture in the ice water test box 1 according to the floating ice volume content in Table 1;

[0062] Step 3, the resistance sensor 5 obtains the rotation resistance F0 at the initial moment;

[0063] Step 4: The resistance sensor 5 obtains the current rotation resistance Ft in real time, and determines whether F0-Ft≥A. If not, execute step 6;

[0064] Step 5: If yes, add ice cubes to the ice water test box 1 and return to step 4;

[0065] Step 6: Determine whether the rotation time of the rotating power unit 3 reaches the preset rotation time. If yes, the testing device stops working. If no, return to step 4.

[0066] After the test is completed, the test sample 4 of Examples 1 to 4 is magnified 100 times using a three-dimensional video display system, and the coating surface appearance of the test sample 4 is as follows: Figures 3 to 6 After the test sample 4 of Examples 1 to 4 was placed at room temperature for 7 days, the coating adhesion and mass loss were tested. The results are shown in Table 2.

[0067] Table 2

[0068]

[0069] Combination Figures 3 to 6As shown in Table 2, the coating performance test results of different embodiments show that when the test sample 4 is installed at an angle of 90°, the impact effect is mainly ice layer impact, and as the rotation speed of the rotating power unit 3 increases, the impact effect becomes larger, and it is mainly used to simulate ice layer impact damage of ships in fast navigation. When the test sample 4 is installed at an angle of 45°, it has both impact and wear effects, and is mainly ice layer wear. As the amount of floating ice increases, the wear effect becomes larger, and it is mainly used to simulate ice layer friction damage of ships in low-speed navigation.

[0070] The present invention can accurately simulate the impact wear damage behavior of the ice layer on the hull and coating during the ship's navigation in ice areas by adjusting and combining the test parameters such as the installation angle of the test sample 4, the floating ice content, the rotation speed of the rotating power unit 3, and the floating ice shape. The intrinsic performance of the coating after the floating ice impact wear test is characterized by the coating micromorphology, adhesion, electrochemical impedance, and mass loss rate, so as to achieve qualitative and quantitative characterization.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test device for simulating the impact and wear behavior of floating ice, characterized in that: The test device comprises an ice water test box (1), a test sample fixing frame (2) and a rotating power unit (3); the ice water test box (1) is used to place a mixture of water and ice cubes; the test sample fixing frame (2) is used to install a test sample (4); the test sample (4) can be inserted into the ice water test box (1); and the rotating power unit (3) is connected to the test sample fixing frame (2) and is used to drive the test sample (4) to rotate.

2. The test device for simulating the impact wear behavior of floating ice according to claim 1, characterized in that: The test sample fixing frame (2) comprises a test sample (4) arranged at multiple angles, wherein the installation angle of the test sample (4) is 0 to 90°.

3. The test device for simulating the impact wear behavior of floating ice according to claim 1, characterized in that: The test sample fixing frame (2) comprises a polyhedral mounting portion and a mounting groove (11) provided on the mounting portion, wherein the mounting groove (11) is connected to the test sample (4), and the mounting groove (11) has different inclination angles.

4. The test device for simulating the impact wear behavior of floating ice according to claim 1, characterized in that: The testing device comprises a resistance sensor (5), and the resistance sensor (5) is connected to a testing sample (4).

5. The test device for simulating the impact wear behavior of floating ice according to claim 1, characterized in that: The ice water test box (1) is provided with a controller, and the controller is used to control the temperature in the ice water test box (1) to be maintained at -5±0.5°C.

6. The test device for simulating the impact and wear behavior of floating ice according to claim 1, characterized in that: The test sample fixing frame (2) comprises a telescopic shaft (6) and a first bracket (7); one end of the telescopic shaft (6) is connected to the rotating power unit (3), and the other end is connected to the test sample (4).

7. The test device for simulating the impact wear behavior of floating ice according to claim 6, characterized in that: The bracket (7) comprises a support plate (8) and a column (9) arranged below the support plate (8), wherein the column (9) is vertically arranged on the upper surface of the ice water test box (1), the telescopic shaft (6) is connected to the support plate (8), and the rotating power unit (3) and the resistance sensor (5) are arranged above the support plate (8).

8. The test device for simulating the impact and wear behavior of floating ice according to claim 1, characterized in that: The ice cubes have different shapes.

9. A detection method, characterized in that: The test device for simulating the impact wear behavior of floating ice according to any one of claims 1 to 8 is used to detect the damage of the floating ice environment ice layer to the hull and coating under laboratory conditions, and the detection method comprises the following steps: Step 1: Raise the test sample fixing frame (2), install the test sample (4) in the installation groove (11) of the test sample fixing frame (2), and lower the test sample fixing frame (2) so that the test sample (4) is completely immersed in the ice-water mixture in the ice-water test box (1); Step 2: setting the rotation speed and rotation time of the rotating power unit (3), the temperature in the ice water test box (1), the volume content of floating ice, and the shape of floating ice; Step 3, the resistance sensor (5) obtains the rotation resistance F0 at the initial moment; Step 4: The resistance sensor (5) obtains the current rotation resistance Ft in real time, and determines whether F0-Ft≥A. If not, execute step 6; Step 5: If yes, add ice cubes to the ice water test box (1) and return to step 4; Step 6: Determine whether the rotation time of the rotating power unit (3) reaches the preset rotation time. If yes, the testing device stops working. If no, return to step 4.

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