Testing device for simulating impact wear behavior of floating ice

Abstract

The utility model provides a test device for simulating 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 cubes, 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 utility model relates to natural environment corrosion indoor simulation device technical field, especially in a kind of test device of simulating ice impact abrasion behavior. BACKGROUND

[0002] Due to the ship in polar and other ice sea navigation, the hull and coating will be impacted and abraded by ice layer, so that the hull coating is more prone to cracking, rust and peeling, so the damage failure behavior of coating under ice region ice environment is a very concerned problem. In view of the performance change in coating ice region environment is difficult to be verified by real ship, therefore, it is particularly important to establish a kind of laboratory accelerated test device for simulating ice impact abrasion environment.

[0003] In the prior art, the simulation of the working condition of the complex environment of seawater-ice interaction is carried out by using a ship model in a large ice pool with ice freezing capacity, mainly for ship resistance test in ice region navigation. CN106394806A discloses an ice region ship icebreaking resistance prediction method based on ice water pool test, which is a large ice pool based icebreaking resistance test prediction of ice region ship in icebreaking process. This method needs a large ice pool as an experimental site. At present, only Tianjin University, Shanghai Maritime University and China Ship 702 Institute have large ice pools. A large amount of ice is needed during the test, and the experimental period is long and the cost is high. Therefore, the ice pool based simulation of ice region ice environment test method is not suitable for laboratory performance evaluation of coating materials that need to carry out a large number of tests and quickly evaluate test results. CN220438068U discloses an ice water impact test box, which sprays ice water on the test sample through an ice water impact spraying assembly. The device has low ice content and does not have ice layer abrasion effect. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a test device for simulating ice impact abrasion behavior to solve the problem that the prior art needs to rely on a large ice pool for testing or cannot well simulate ice impact abrasion behavior.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] The application discloses a test device for simulating floating ice impact and abrasion behavior, which comprises an ice-water test box, a test sample fixing frame and a rotating power part, the ice-water test box is used for placing a mixture of water and ice blocks, the test sample fixing frame is used for mounting a test sample which can be extended into the ice-water test box, and the rotating power part is connected with the test sample fixing frame and used for driving the test sample to rotate. The test sample is extended into the ice-water test box and stirred in the ice-water mixture under the driving of the rotating power part, the relative movement between the floating ice and the test sample is utilized, and the floating ice and the water continuously impact and abrade the test sample, so as to simulate the navigation condition of a ship in a floating ice environment, establish a test device for simulating floating ice impact and abrasion behavior in a laboratory, provide a reliable device for researching the damage of the floating ice in an ice area to a ship surface and a coating material, reduce the dependence on a real ship verification, effectively shorten a test period, and reduce the investment of manpower and material resources.

[0007] Further, the test sample fixing frame comprises test samples arranged at different angles, and the mounting angle of the test sample is 0-90 degrees. The test sample has different mounting inclination angles, and the abrasion and / or impact effect can be simulated according to the angle condition.

[0008] Further, the test sample fixing frame comprises a polyhedral mounting part and a mounting groove arranged on the mounting part, the mounting groove is connected with the test sample, and the mounting groove has different inclination angles. The mounting groove not only has the function of mounting the test sample, but also can make the test sample have different mounting angles by utilizing the inclination angles of the mounting groove. The polyhedral mounting part can increase the number of the mounting grooves, so that a plurality of test samples are distributed on the test sample fixing frame, and the floating ice environment in different ice areas can be fully simulated.

[0009] Further, the test device comprises a resistance sensor connected with the test sample. The resistance sensor is used for sensing and acquiring the torsion of the floating ice layer on the test sample in the rotating process, and the torsion is combined with the torque of the test sample in the rotating process, so as to finally convert the rotating resistance, and the content change of the floating ice in the ice-water test box can be monitored according to the change of the rotating resistance.

[0010] Further, the ice-water test box is provided with a controller, and the controller is used for controlling the temperature in the ice-water test box to be kept at-5±0.5℃. The purpose of keeping the temperature at-5±0.5℃ is to maintain a low-temperature environment, prevent the ice blocks from melting into water, and ensure that the ice-water test box always has the ice-water mixture, so as to better fit the floating ice environment.

[0011] Further, the test sample fixing frame comprises a telescopic shaft and a support, one end of the telescopic shaft is connected with the rotating power part, and the other end of the telescopic shaft is connected with the test sample. The telescopic shaft can be telescoped in the up-down direction, so as to adjust the depth of the test sample extended into the floating ice layer.

[0012] Further, the support frame comprises 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 with the support plate, and the rotating power part and the resistance sensor are arranged above the support plate.

[0013] Further, the ice blocks have different shapes. Through cooperation with other parameters, the impact and wear damage behavior of the ice layer on the ship body and the coating during ship navigation in the ice area can be simulated.

[0014] Compared with the prior art, the test device for simulating the impact and wear behavior of floating ice has the following advantages:

[0015] (1) The relative motion of floating ice and the test panel is utilized, and the test panel is continuously impacted and worn by the floating ice and water, so as to simulate the navigation condition of the ship in the floating ice environment, establish a test device for simulating the impact and wear behavior of floating ice in a laboratory, provide a reliable device for studying the damage of the floating ice in the ice area to the ship body surface and the coating, reduce the dependence on the real ship verification, effectively shorten the test period, and reduce the investment of manpower and material resources.

[0016] (2) Through adjustment and combination of test parameters such as the installation angle of the test panel, the floating ice content, the rotating speed of the rotating power part, and the shape of the floating ice, the impact and wear damage behavior of the ice layer on the ship body and the coating during ship navigation in the ice area can be accurately simulated.

[0017] (3) The utility model has the characteristics of laboratory scene simulation, controllable parameters, data acquisition, safety and reliability, easy detection, fast and efficient detection, accurate evaluation, guiding significance for theoretical research, and contribution to the development of new ice area wear-resistant coating materials, so as to improve the corrosion protection performance and period effect of the coating material on the ice area navigation ship. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings that form a part of the present utility model are used to provide a further understanding of the present utility model, the schematic embodiments of the present utility model and the description thereof are used to explain the present utility model, and do not constitute an improper limitation on the present utility model. In the drawings:

[0019] Figure 1 It is a structure schematic view of the test device for simulating the impact and wear behavior of floating ice according to the present utility model;

[0020] Figure 2 It is a different shape schematic view of the ice block;

[0021] Figure 3 It is a coating surface appearance view of the embodiment 1 of the present utility model;

[0022] Figure 4The coating surface appearance diagram of the embodiment 2 of the utility model;

[0023] Figure 5 The coating surface appearance diagram of the embodiment 3 of the utility model;

[0024] Figure 6 The coating surface appearance diagram of the embodiment 4 of the utility model.

[0025] Mark explanation:

[0026] 1, ice water test box;2, test sample fixed frame;3, rotating power part;4, test sample;5, resistance sensor;6, telescopic shaft;7, support;8, support plate;9, stand;10, man-machine conversation window;11, mounting groove. Specific implementation

[0027] The utility model will be described in detail below in combination with the embodiments and reference to the drawings. The embodiments described in the utility model are exemplary, and are intended to explain the utility model, and cannot be understood as limiting the utility model.

[0028] It should be noted that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0029] As Figure 1 The utility model discloses a test device of simulating ice impact and abrasion behavior, including ice water test box 1, test sample fixed frame 2 and rotating power part 3, ice water test box 1 is used to place the mixture of water and ice block, test sample fixed frame 2 is used to install test sample 4, test sample 4 can be inserted into ice water test box 1, rotating power part 3 is connected with test sample fixed frame 2, is used to drive test sample 4 rotation. Test sample 4 is inserted into ice water test box 1, and is stirred in ice water mixture under the driving action of rotating power part 3, utilizes the relative motion of ice and test sample 4, and ice and water constantly impact and abrade test sample 4, to simulate the navigation situation of ship in ice environment, establishes a kind of laboratory to simulate ice impact and abrasion behavior of test device, provides reliable device for the damage of ice area ice to ship surface and coating and other materials, reduces the dependence of real ship verification, and effectively shortens test period, reduces the input of manpower and material resources.

[0030] Furthermore, the water is a 0%~5% sodium chloride solution used to form brine, simulating a seawater corrosion environment. The freezing point of the brine is ≤-5℃.

[0031] The test template holder 2 includes test templates 4 set at multiple angles, with the installation angle of the test templates 4 ranging from 0° to 90°. The test templates 4 have different installation tilt angles, which can simulate wear and / or impact effects depending on the angle. When a ship navigates in an ice-covered area, the waterline portion of the hull is subjected to the impact of ice. The bow is primarily subjected to vertical impact from the ice, while the midships are primarily subjected to parallel wear. In the design of the installation angle of the test templates 4, this application simulates the impact or wear effects from the ice layer experienced by the bow to the midships by setting the angle (0° to 90°) between the test surface of the test template 4 and the rotating tangential surface of the ice. Specifically, when the angle between test specimen 4 and the rotating section of the ice floe is 90°, it mainly simulates the impact of ice on the bow; when the angle is 0°, it mainly simulates the wear and tear of ice on the midsection of the hull; when the angle is between 0° and 90°, it achieves the coupling of the impact and wear of the ice and the transformation of the intensity of the effect. With the cooperation of the rotational drive, and by combining different angle settings, different ice floe environments can be simulated. The installation angle mentioned in this application refers to the angle between test specimen 4 and the horizontal plane.

[0032] As a preferred example of this utility model, the test template holder 2 includes a polyhedral mounting portion and mounting slots 11 formed on the mounting portion. The mounting slots 11 are connected to the test templates 4, and the mounting slots 11 have different inclination angles. The mounting slots 11 not only serve to mount the test templates 4, but also allow the test templates 4 to have different mounting angles due to their own inclination angles. The polyhedral structure of the mounting portion increases the number of mounting slots 11, thereby distributing multiple test templates 4 on the test template holder 2 to fully simulate the floating ice environments of different ice zones.

[0033] In the utility model, the shape, size and quantity of the test sample 4 are not specifically limited. Considering the convenience of installation and testing of the test sample 4, the size of the test sample 4 is 150mm (length) x 75mm (width) x (3~5)mm (height). The material of the test sample 4 is the material used for the ship body and has a coating. The rotating power part 3 of the utility model is a motor, the rotating 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 speed at the center line of the test sample 4 can be calculated as 0.5m / s~35m / s. The highest sailing speed of the ship in the ice area is generally 3m / s, therefore the rotating speed set in the utility model matches the actual sailing speed of the ship. The change of the force of the ice layer on the ship body and the coating is simulated by adjusting the rotating speed of the motor.

[0034] The test device comprises a resistance sensor 5 connected with the test sample 4. The resistance sensor 5 is used for sensing and acquiring the torque of the ice layer on the test sample 4 in the rotating process, and combined with the torque of the test sample 4 in the rotating process, finally converting into the rotating resistance, and monitoring the change of the ice content in the ice water test tank 1 according to the change of the rotating resistance.

[0035] Considering that the real ship sails in the environment of the icing sea area, the change of the ice is small, and under the laboratory condition, the volume of the test device is limited, the test sample 4 in the rotating process will cause the breaking of the ice and the heat exchange, and affect the ice content in the ice water test tank 1. The utility model sets the resistance sensor 5, and the ice content is monitored in real time by using the acquired rotating resistance, when the real-time rotating resistance Ft is less than the initial moment rotating resistance F0, it is explained that the ice content is reduced, and the operator is reminded to supplement the ice block in time. The ice content is stabilized by using the resistance sensor 5 and supplementing the ice block in time, which is beneficial to the test device of the utility model for simulating the ice impact and wear behavior to be closer to the actual icing sea area, and improve the simulation accuracy.

[0036] As a preferable example of the utility model, the ice water test tank 1 is provided with a controller for controlling the temperature in the ice water test tank 1 to be kept at-5±0.5℃. The ice water test tank 1 is filled with ice blocks and water solution added with antifreeze, and the volume content of the ice block is 0~50%. The purpose of adding the antifreeze is to prevent the water from freezing, and the purpose of keeping the temperature at-5±0.5℃ is to maintain the low-temperature environment, prevent the ice block from melting into water, and ensure that the ice water test tank 1 always has ice water mixture, so as to better fit the ice environment. Wherein, the characteristics and added amount of the ice can be customized according to the test requirement. Figure 2 As shown in the figure, different shapes of ice blocks are prepared by using a mold, such as triangle, square, circle, star and other complex shapes. Specifically, the antifreeze is any one of ethylene glycol and propylene glycol, and the added amount of the antifreeze is 1%~15%.

[0037] Further, the test sample holder 2 comprises a telescopic shaft 6 and a support 7, one end of the telescopic shaft 6 is connected with the rotating power part 3, and the other end is connected with the test sample 4. The telescopic shaft 6 can be telescoped in the up-down direction, so as to adjust the depth of the test sample 4 into the ice layer.

[0038] The support 7 comprises a support plate 8 and a column 9 arranged below the support plate 8, the column 9 is vertically arranged on the upper surface of the ice-water test box 1, the telescopic shaft 6 is connected with the support plate 8, and the rotating power part 3 and the resistance sensor 5 are arranged above the support plate 8. The support plate 8 provides a mounting site for the telescopic shaft 6, and the support 7 is beneficial to reduce the shaking of the test sample 4 under the impact of the ice, and improve the stability of the whole test device.

[0039] In order to facilitate the operation of the test device, the test device comprises a lifting button, a parameter setting interface and a man-machine conversation window 10, the lifting height of the test sample holder 2 is controlled by operating the lifting button, the parameter setting interface is used for setting the rotating speed, rotating time of the rotating power part 3 and the temperature in the ice-water test box 1. The man-machine conversation window 10 is convenient for the user to operate the test device.

[0040] The test device for simulating the impact and abrasion behavior of floating ice of the utility model, under the laboratory condition, the ice-water test box 1 is used to provide ice-water mixture and the environmental control of ice-water mixture, and the impact and abrasion behavior of ice layer in the floating ice environment is fully simulated by rotating method, and the laboratory simulation accelerated test device for studying the damage of floating ice environment to the ship surface and coating materials is provided. Meanwhile, the simulation of different ice area floating ice environment can be realized by controlling the rotating speed, rotating time of the rotating power part 3, the multi-angle adjustment of the test sample 4 and other parameters.

[0041] The utility model will be specified in combination with embodiments. In embodiments 1~4, different floating ice volume content, test sample 4 installation angle, rotating speed and rotating time of rotating power part 3 are set, and the specific embodiments are shown in table 1. Embodiments 1~4 are all carried out in the low-temperature environment with the temperature of-5 DEG C in the ice-water test box 1, and the number of test samples 4 is 4.

[0042] Table 1

[0043]

[0044] The detection method of the test device for simulating the impact and abrasion behavior of floating ice of the application comprises the following steps:

[0045] Step one, start the lifting button, make the test sample holder 2 rise, install the test sample 4 according to the installation angle of the test sample 4 in Table 1, start the lifting button again, make the test sample holder 2 descend, and make the test sample 4 completely immerse in the ice-water mixture in the ice-water test box 1;

[0046] Step two, in the parameter setting interface, set the parameters according to the rotating speed, rotating 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 ice volume content in Table 1;

[0047] Step three, the resistance sensor 5 obtains the initial rotating resistance F0;

[0048] Step four, the resistance sensor 5 obtains the current rotating resistance Ft in real time, and judges whether F0-Ft≥A, if not, step six is executed;

[0049] Step five, if yes, supplement the ice content in the ice-water test box 1, and return to step four;

[0050] Step six, judge whether the rotating time of the rotating power part 3 reaches the preset rotating time, if yes, the test device stops working, if not, return to step four.

[0051] Specifically, in step four, the size of A is set according to the experience value of the person skilled in the art.

[0052] After the test is completed, the test sample 4 of Examples 1-4 is enlarged 100 times by the three-dimensional video display system, and the appearance of the coating surface of the test sample 4 is as shown in Figures 3-6 After the test sample 4 of Examples 1-4 is placed in a room temperature environment for 7 days, the coating adhesion and mass loss are tested, and the results are shown in Table 2.

[0053] Table 2

[0054]

[0055] In combination Figures 3-6 with Table 2, it can be known from the coating performance test results of different examples that when the installation angle of the test sample 4 is 90°, the impact of ice layer is mainly used, and with the increase of the rotating speed of the rotating power part 3, the impact effect becomes larger, which is mainly used to simulate the ice layer impact damage of the ship in fast sailing. When the installation angle of the test sample 4 is 45°, the impact and wear effects are combined, and the wear effect of the ice layer is mainly used, and with the increase of the ice volume, the wear effect becomes larger, which is mainly used to simulate the ice layer friction damage of the ship in low-speed sailing.

[0056] The utility model discloses through the adjustment and combination of test parameters such as test sample 4 installation angle, ice content, the rotation speed of rotary power part 3, ice shape, can realize the accurate simulation of the ice layer impact wear damage behavior of ship in the ice area navigation to the ship body and coating. The coating intrinsic performance after the ice impact wear test is characterized by using the micro-morphology of coating, adhesion, electrochemical impedance and mass loss rate, and qualitative and quantitative characterization is realized.

[0057] The above merely describes preferred embodiments of the utility model, and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A test apparatus for simulating the impact wear behavior of floating ice, characterized in that, The test device comprises an ice-water test box (1), a test sample fixed frame (2) and a rotating power part (3), the ice-water test box (1) is used for placing a mixture of water and ice blocks, the test sample fixed frame (2) is used for installing a test sample (4), the test sample (4) can be inserted into the ice-water test box (1), the rotating power part (3) is connected with the test sample fixed frame (2) and used for driving the test sample (4) to rotate.

2. A test apparatus to simulate the impact abrasion behaviour of floating ice according to claim 1, characterized in that, The test sample fixed frame (2) comprises test samples (4) arranged at multiple angles, and the installation angle of the test sample (4) is 0-90°.

3. The test apparatus to simulate the impact abrasion behavior of floating ice according to claim 1, characterized in that, The test sample fixed frame (2) comprises a polyhedral installation part and an installation slot (11) formed on the installation part, the installation slot (11) is connected with the test sample (4), and the installation slot (11) has different inclination angles.

4. The test apparatus to simulate the impact abrasion behavior of floating ice according to claim 1, characterized in that, The test device comprises a resistance sensor (5), and the resistance sensor (5) is connected with the test sample (4).

5. The test apparatus to simulate the impact abrasion 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 for controlling the temperature in the ice-water test box (1) to be kept at -5±0.5℃.

6. The test apparatus to simulate the impact abrasion behavior of floating ice according to claim 1, characterized in that, The test sample fixed frame (2) comprises a telescopic shaft (6) and a support (7), one end of the telescopic shaft (6) is connected with the rotating power part (3), the other end is connected with the test sample (4).

7. A test apparatus to simulate the impact abrasion behaviour of floating ice according to claim 6, characterized in that, The support (7) comprises a support plate (8) and a stand column (9) arranged below the support plate (8), the stand column (9) is vertically arranged on the upper surface of the ice-water test box (1), the telescopic shaft (6) is connected with the support plate (8), and the rotating power part (3) and the resistance sensor (5) are arranged above the support plate (8).

8. The test apparatus to simulate the impact abrasion behavior of floating ice according to claim 1, characterized in that, The ice blocks have different shapes.

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