Ice accretion shear adhesion measurement device and test method

Abstract

The present invention belongs to the field of ice performance testing, and specifically relates to an ice accretion shear adhesion test device. The device includes an ice accretion specimen, a fixing mechanism, a clamping mechanism, a linear stretching mechanism, and a sensor. The ice accretion specimen includes an ice accretion specimen and an ice accretion mold. At least one surface of the ice accretion specimen is provided with a coating to be tested. The ice accretion mold is provided with an opening at the bottom, which is used to provide a site for ice accretion to adhere to the coating to be tested. The fixing mechanism is used to fix the ice accretion mold; the clamping mechanism is used to clamp the ice accretion specimen; the linear stretching mechanism is connected to the clamping mechanism and provides a tensile force along the direction of the ice accretion specimen to separate the coating to be tested from the ice accretion on the surface of the ice accretion specimen. One end of the sensor is connected to the linear stretching mechanism, and the other end is connected to the clamping mechanism to collect the real-time tensile force applied to the clamping mechanism. The present invention has a relatively simple structure, a small size, and a low cost. It can be directly placed in a general low-temperature environmental chamber for measurement and can accurately measure the ice accretion shear adhesion of the coating to be tested.

Description

Technical Field

[0001] The present invention belongs to the field of ice performance testing, and in particular relates to an ice accretion shear adhesion measurement device and a testing method. Background Art

[0002] There have been many studies at home and abroad on the measurement of ice adhesion strength on material surfaces, and various types of test devices and test methods have been produced.

[0003] Farzaneh, C. Laforte, et al., and patent document CN212622146U disclose using high-speed rotation to centrifugally detach ice adhered to an aluminum substrate. The speed at which the ice detaches is recorded, which is used to convert the centrifugal force exerted on the ice and, in turn, calculate the adhesion of the ice. However, this method requires a high-power motor to achieve high-speed rotation, resulting in high costs and a large size. Furthermore, recording the detachment speed of high-speed ice requires a high-precision vibration measurement device or a high-speed camera, which increases costs. Furthermore, this measurement method is indirect and has low accuracy.

[0004] Patent document CN103760106A discloses an ice-coating mold, and a device and method for measuring ice shear force using the same. The method uses a circular ice accretion mold to form ice attached to a substrate. The frozen ice accretion specimen and the ice mold are then clamped on a universal tensile and compressive testing machine. A loading head is used to push the circular ice accretion mold until it detaches. An electronic tensile test is then performed, and the maximum value of the test pressure variation is recorded to obtain the shear adhesion of the ice. While this method can measure the shear adhesion of ice accretion, it still relies on an electronic tensile and compressive testing machine, an ice specimen mold, and other components. The test apparatus is complex, large, and expensive. Because the loading head is rigidly fixed to the electronic tensile and compressive testing machine, it inevitably results in installation centering offset, leading to poor consistency in the measurement results. Furthermore, the ambient temperature during the measurement process significantly affects the measurement results, requiring a larger environmental chamber to ensure low-temperature testing conditions, further increasing the testing cost. Summary of the Invention

[0005] In order to improve the deficiencies of the prior art, the present invention provides an ice accretion shear adhesion test device and a measurement method. The device is small in size and low in cost. It can be directly placed in a general low-temperature environment box for measurement and can accurately measure the ice accretion shear adhesion of the coating to be tested.

[0006] To achieve the above object, the present invention provides an ice accretion shear adhesion testing device, comprising:

[0007] An ice accretion test piece comprising an ice accretion test piece and an ice accretion mold, wherein at least one surface of the ice accretion test piece is provided with a coating to be tested, and an opening is provided at the bottom of the ice accretion mold, wherein the opening is used to provide a site for ice accretion to adhere to the coating to be tested;

[0008] a fixing mechanism for fixing the ice accretion mold;

[0009] a clamping mechanism for clamping the ice accretion test piece;

[0010] A linear stretching mechanism connected to the clamping mechanism provides a pulling force along the direction of the ice accretion test piece to separate the coating to be tested from the ice accretion on the surface of the ice accretion test piece;

[0011] The sensor has one end connected to the linear stretching mechanism and the other end connected to the clamping mechanism, and is used to collect the real-time tension exerted on the clamping mechanism.

[0012] According to an embodiment of the present invention, the testing device further comprises a data acquisition device, which is connected to the sensor and is used to receive data collected by the sensor. The connection can be a wired connection or a wireless connection, for example, via a wire, WiFi, Bluetooth, etc.

[0013] According to an embodiment of the present invention, the clamping mechanism and the sensor are connected via a hook, and the hook is preferably made of elastic material.

[0014] According to an embodiment of the present invention, the sensor is a tension sensor or a tension pressure sensor, for example, a tension pressure sensor.

[0015] According to an embodiment of the present invention, the linear stretching mechanism includes a power assembly and a linear loading assembly. One end of the linear loading assembly is connected to the power assembly, and the other end is connected to the sensor. The power assembly is used to provide a pulling force along the direction of the ice accumulation test piece. The linear loading assembly can move along the pulling direction under the action of the pulling force.

[0016] According to an embodiment of the present invention, the linear loading assembly includes a loading base, a linear slide rail is provided below the loading base, and the loading base is connected to the linear slide rail via a slider.

[0017] According to an embodiment of the present invention, the power assembly includes an electric structure or a manual structure, and the electric structure is, for example, a motor or other electric device capable of providing power.

[0018] According to an embodiment of the present invention, the manual structure includes a loading panel, a rotating flange bearing is provided on the loading panel, a linear loading bolt is rotatably connected to the rotating flange bearing, and the end of the linear loading bolt away from the rotating flange bearing is connected to the loading base through a U-shaped connecting frame. When the linear loading bolt is rotated, the U-shaped connecting frame can convert the rotational motion into linear motion, driving the loading base to slide.

[0019] According to an embodiment of the present invention, the manual structure further comprises support frames relatively arranged on both sides of the loading panel.

[0020] According to an embodiment of the present invention, the fixing mechanism includes a guide base, the guide base is provided with a receiving cavity, the receiving cavity is used to receive the ice accretion specimen, and when the ice accretion specimen is located in the receiving cavity, at least 1 / 3 of the ice accretion specimen extends out of the guide base, and a fixed block is detachably connected to the guide base, and the fixed block is used to fix the ice accretion mold.

[0021] According to an embodiment of the present invention, a fixing groove is provided on the side of the guide base, and the fixing groove is used to install a fixed stopper. When the fixed stopper is inserted into the fixing groove, the fixed stopper abuts against the outside of the ice accretion mold, fixing the ice accretion mold in the accommodating cavity to prevent the ice accretion mold from moving.

[0022] According to an embodiment of the present invention, the clamping mechanism includes a clamping base and a clamping cover plate connected to each other, and a clamping opening is provided in the clamping cover plate, the clamping opening faces the end of the ice accretion test piece extending out of the fixed base, and the clamping opening is used to clamp the ice accretion test piece extending out of the accommodating cavity.

[0023] According to an embodiment of the present invention, the depth of the clamping opening is greater than 1 / 3 of the length of the ice accretion test piece 1 , and preferably, the depth of the clamping opening is greater than 1 / 2 of the length of the ice accretion test piece 1 .

[0024] According to an embodiment of the present invention, a clamping piece for fastening the ice accretion specimen may be provided on the clamping cover at a position corresponding to the clamping opening.

[0025] According to an embodiment of the present invention, a hook connected to a lifting ring is provided at the end of the clamping base.

[0026] According to an embodiment of the present invention, a height adjustment gasket is provided at the bottom of the fixing mechanism, and the height adjustment gasket is used to adjust the height of the fixing mechanism and the clamping mechanism so that the ice accretion specimen and the tension transmitted by the ring are in the same plane.

[0027] According to an embodiment of the present invention, the center of the hook is at the same height as the center of the ice accretion test piece.

[0028] According to an embodiment of the present invention, the center of the linear loading bolt, the center of the U-shaped connecting frame, the center of the loading base and the center of the hook are at the same height.

[0029] According to an embodiment of the present invention, the center of the sensor is at the same height as the center of the hook.

[0030] According to an embodiment of the present invention, the testing device further comprises a testing base, and the fixing mechanism and the linear stretching mechanism are both arranged on the testing base.

[0031] According to an embodiment of the present invention, a height adjustment spacer is provided between the fixing mechanism and / or the linear stretching mechanism and the test base.

[0032] According to an embodiment of the present invention, the ice accretion mold is manufactured using a light-curing 3D printing technology, and preferably, the ice accretion mold is made of an elastic material.

[0033] The present invention further provides a method for testing ice accretion shear adhesion using the above-mentioned testing device, comprising the following steps:

[0034] S1. Install the ice accretion mold above the coating of the ice accretion specimen, inject water to accumulate ice, install it in a fixing mechanism, and connect the ice accretion specimen to the clamping mechanism;

[0035] S2. Rotate the loading platform bolts to drive the clamping mechanism away from the fixing mechanism until the ice accretion specimen separates from the ice accretion mold. Record the maximum tensile force F collected by the sensor and calculate the ice accretion shear force using the shear force formula τ = F / A, where A is the ice coverage area.

[0036] Beneficial effects

[0037] (1) The ice accretion shear adhesion test device of the present invention includes a fixing mechanism for fixing the ice accretion mold, a clamping mechanism for clamping the ice accretion test piece, a linear stretching mechanism for providing tension along the direction of the ice accretion test piece, and a sensor for testing and collecting the real-time tension of the clamping mechanism. The device has a simple structure, a small size, and a low cost. It can be directly placed in a general low-temperature environment box for measurement and can accurately measure the ice accretion shear adhesion of the coating to be tested.

[0038] (2) The ice accretion shear adhesion test device of the present invention has a power component including a loading panel, a rotating flange bearing is provided on the loading panel, a linear loading bolt is rotatably connected to the rotating flange bearing, and the end of the linear loading bolt away from the rotating flange bearing is connected to the loading base through a U-shaped connecting frame. When the linear loading bolt is rotated, the U-shaped connecting frame can convert the rotational motion into linear motion, driving the loading base to slide. The power component has a simple structure and does not require electricity or other energy. The test speed can be controlled manually, so that the test process of the ice specimen is closer to the actual stress condition, the test difficulty is relatively low, the cost is relatively low, and the accuracy is relatively high.

[0039] (3) The ice accretion shear adhesion test device of the present invention connects the sensor and the clamping mechanism through an elastic hook, which can achieve uniform force loading, compensate for the error caused by bias, and achieve more accurate measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic structural diagram of an ice accretion shear adhesion testing device according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the ice coating mold structure according to one embodiment of the present invention;

[0042] Figure 3 This is a structural diagram of a fixed platform according to an embodiment of the present invention;

[0043] Figure 4 This is a schematic structural diagram of a linear stretching device according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic structural diagram of the cooperation between the fixing mechanism and the clamping mechanism according to an embodiment of the present invention.

[0045] Among them, 1-ice accretion test piece, 111-coating to be tested, 2-ice accretion mold, 4-fixed platform, 5-linear stretching mechanism, 6-sensor, 7-hook, 8-clamping mechanism, 9-ice accretion specimen, 10-fixed mechanism, 12-test base, 13-support bracket, 14-loading panel, 15-linear loading bolt, 16-flange bearing, 17-U-shaped bracket, 18-loading base, 19-lifting ring, 21-slider, 22-linear guide, 23-guide rail mounting adapter plate, 25-clamping base, 26-clamping cover, 27-fixed block, 28-fixed base, 29-fixing slot, 30-height adjustment gasket. DETAILED DESCRIPTION

[0046] The structure and application of the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the following embodiments are merely exemplary illustrations and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are encompassed within the scope of protection intended by the present invention.

[0047] In the description of the invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to electrical connections or mechanical connections. Mechanical connections may be direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0049] Example 1

[0050] See also Figure 1 As shown, an ice accretion shear adhesion test device includes a fixed platform 4, a linear stretching mechanism 5, a sensor 6, a hook 7, a clamping assembly 8, an ice accretion specimen 9, a fixing mechanism 10 and a data acquisition device 11. Among them, one end of the linear stretching mechanism 5 is connected to the fixed platform 4, and the other end is connected to the sensor 6. The sensor 6 is connected to the clamping assembly 8 via the hook 7. The clamping assembly 8 is used to clamp the ice accretion specimen 1 to be tested. The fixing mechanism 10 is used to fix the ice accretion mold 2. The sensor 6 is also connected to a data acquisition device 11 for transmitting the obtained tension and pressure data to the data acquisition device 11.

[0051] The fixed platform 4, linear stretching mechanism 5, clamping assembly 8, and fixing mechanism 10 in this embodiment are all arranged on a test base 12 and are detachably connected to the test base 12. The test base 12 is used to provide an assembly plane with a uniform height to assemble the various components into an integral test device.

[0052] See also Figure 2As shown, the ice accretion specimen 9 includes an ice accretion specimen 1 and an ice accretion mold 2. At least one surface of the ice accretion specimen 1 is used to set the coating to be tested 111. The ice accretion mold 2 is used to contain liquid and form ice accretion. The bottom of the ice accretion mold 2 is provided with an opening, which is used to contact the coating to be tested 111 so that the bottom of the formed ice accretion adheres to the surface of the coating to be tested 111. The top of the ice accretion mold is provided with an injection port for injecting liquid.

[0053] The shape of the ice accretion test piece 1 is set according to actual needs and can be a long strip, a square or other shapes. In this embodiment, the ice accretion test piece 1 is a long strip. In this embodiment, the ice accretion test piece 1 can be a long strip test piece cut from different materials, which is simple to process and has stable size; the ice accretion mold 2 can be flexibly adjusted according to the size of the test piece.

[0054] When ice accretion occurs, the bottom surface of the ice accretion mold 2 is placed on the coating to be tested 111 and the entire ice accretion specimen is mounted on the ice accretion test piece 1. The mounted ice accretion test piece is placed at a low temperature and dripped with supercooled water. After completion, ice accretion is adhered to the surface coating of the ice accretion test piece 1.

[0055] The area of ​​the bottom opening of the ice accretion mold 2 is set according to actual needs. The area of ​​the bottom opening of the ice accretion mold 2 is determined according to the area of ​​contact between the ice accretion and the coating to be tested 111. In this embodiment, the area of ​​the bottom opening of the ice accretion mold 2 is greater than or equal to 1 / 5 of the surface area of ​​the ice accretion test piece 1. For example, the bottom of the ice accretion mold 2 is a completely open structure, and at least two side surfaces of the ice accretion mold 2 extend downward for being clamped onto the outside of the ice accretion test piece 1.

[0056] In this embodiment, in order to obtain better ice accretion stress conditions and controllable ice accretion coverage conditions, the ice accretion mold 2 is manufactured using light-curing 3D printing technology. The material is light-curing resin, which has elasticity and can prevent the generation of ice accretion stress. When subjected to stress, the stress conditions can be greatly improved, preventing the ice cubes from being unevenly stressed and cracking, which affects the experimental results. The cross-sectional area of ​​the inner cavity of the ice accretion mold 2 can be controlled when the ice accretion mold is printed and manufactured, which can be used to study the adhesion under different ice accretion area conditions.

[0057] like Figure 3 As shown, the fixed platform 4 includes two opposing support brackets 13, a loading panel 14 is provided between the support brackets 13, and the bottom of the loading panel 14 is fixed to the test base 12. In this embodiment, the loading panel 17 is mounted on the support bracket 13 by bolts and then fixed to the test base 12 as a whole. A flange bearing 16 is provided on the loading panel 14, and a linear loading bolt 15 is inserted into the flange bearing 16. For example, the flange bearing 16 is installed in the center of the loading panel 14 by a fixing bolt. The linear loading bolt 15 passes through the flange bearing 16 and is rotatably connected to the flange bearing 16. The linear loading bolt 15 can rotate freely in the flange bearing 16.

[0058] like Figure 4 As shown, the linear stretching mechanism 5 includes a U-shaped bracket 17 and a loading base 18 connected to each other. The end of the U-shaped bracket 17 away from the loading base 18 is connected to the linear loading bolt 15, which is used to convert the rotational motion of the linear loading bolt 15 into linear motion (specifically, the U-shaped bracket 17 is threadedly connected to the linear loading bolt 15, and the outer side of the loading bolt 15 is provided with an external thread. The U-shaped bracket 17 is provided with an internal bolt corresponding to the loading bolt 15. When the loading bolt 15 rotates, the U-shaped bracket 17 is pushed open or pulled in, thereby converting the rotational motion into linear motion). A linear guide rail 22 is provided below the loading base 18. The loading base 18 is connected to the linear guide rail 22 through a slider 21. When pushed and pulled by the U-shaped bracket 17, the loading base 18 can drive the slider 21 to perform linear motion on the linear guide rail 22. The end of the tension and pressure loading base 18 away from the U-shaped bracket 17 is connected to the sensor 6 for measuring the force magnitude and direction of the loading base 18. The linear guide rail 22 is connected to the test base 12 through a guide rail mounting adapter plate 23.

[0059] The loading panel 17 , the linear loading bolts 15 and the U-shaped bracket 17 constitute a power assembly. In other embodiments, the power assembly may also be a motor, for example, the motor is connected to the loading base 18 via a screw.

[0060] like Figure 5 As shown, the fixing mechanism 10 includes a guide base 28, which is provided with a receiving cavity for receiving the ice accretion specimen 9, and at least 1 / 3 of the ice accretion specimen 1 of the ice accretion specimen 9 extends out of the guide base 28. A fixed stopper 27 is detachably connected to the guide base 28, and a fixing groove 29 is provided on the side of the guide base 28 for mounting the fixed stopper 27. When the fixed stopper 27 is inserted into the fixing groove 29, the fixed stopper 27 abuts against the outer side of the ice accretion mold 2, fixing the ice accretion mold 2 in the receiving cavity to prevent the ice accretion mold 2 from moving.

[0061] The clamping mechanism 8 includes a clamping base 25 and a clamping cover 26 that are connected to each other. A clamping opening is provided in the clamping cover 26, which faces the fixed base 28 and is used to clamp the ice accretion test piece 1 extending out of the accommodating cavity. A clamping member for fastening the ice accretion test piece 1 can be provided at a position corresponding to the clamping opening on the clamping cover 26. The depth of the clamping opening is set according to actual needs, for example, greater than 1 / 2 the length of the ice accretion test piece 1, so as to provide a larger clamping area to prevent the ice accretion test piece 1 from slipping or uneven force.

[0062] The clamping base 25 is connected to the sensor 20 through a hanging ring 19. Specifically, a hook 7 connected to the hanging ring 19 is provided at the end of the clamping base 25. The hanging ring 19 is installed on the sensor 20. The hanging ring 19 is made of elastic material and can achieve uniform force loading, so that the data collected by the sensor 20 is more accurate.

[0063] In this embodiment, a height adjustment gasket 30 is provided at the bottom of the fixing mechanism 10. The height adjustment gasket 30 is used to adjust the height of the fixing mechanism and the clamping mechanism 8 so that the tension transmitted by the ice accretion specimen 9 and the ring 19 is in the same plane.

[0064] During use, the ice accretion specimen 9 is first placed into the accommodating cavity, the end of the ice accretion specimen 1 is inserted into the clamping opening, the fixed stopper 27 is fixed to the top of the guide base 28, the clamping member is adjusted to clamp the ice accretion specimen 1, and the linear loading bolt 15 is rotated. The tensile and compressive loading base 18 is driven to slide toward the loading panel 14 via the U-shaped bracket 17, thereby pulling the clamping mechanism 8 and the ice accretion specimen 1 located in the clamping opening toward the loading panel 14 via the loading ring 19. The ice accretion mold 2 and the ice accumulated therein are fixed by the fixing mechanism 10 and cannot move. When the tension provided by the rotation of the linear loading bolt 15 is sufficient, the ice accretion specimen 1 is separated from the ice at the bottom of the ice accretion mold 2. At this time, the tension value of the ice accretion specimen 9 is instantly reduced. The maximum value previously measured by the sensor 6 is the ice detachment tension value. The ice accretion shear force τ can be calculated using the shear force formula τ = F / A, where F is the ice detachment tension and A is the ice coverage area.

[0065] Example 2

[0066] A method for testing ice accretion shear adhesion using the above-mentioned testing device comprises the following steps:

[0067] S1, installing the ice accretion mold 2 above the coating 111 of the ice accretion specimen 1, injecting water to accrete ice, and then fixing it in the fixing mechanism 10 and connecting the ice accretion specimen 1 to the clamping mechanism 8;

[0068] S2. Rotate the loading platform bolt 15 to drive the clamping mechanism 8 away from the fixing mechanism 10 until the ice accretion specimen 1 separates from the ice accretion mold 2. Record the maximum tensile force F collected by the sensor 5. Calculate the ice accretion shear force using the shear force formula τ = F / A, where A is the ice accretion coverage area.

[0069] The above examples illustrate the specific embodiments of the present invention. However, the scope of protection of the present invention is not limited to the above-mentioned exemplary embodiments. Any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An ice accretion shear adhesion test device, characterized in that: include: An ice accretion test piece comprising an ice accretion test piece and an ice accretion mold, wherein at least one surface of the ice accretion test piece is provided with a coating to be tested, and an opening is provided at the bottom of the ice accretion mold, wherein the opening is used to provide a site for ice accretion to adhere to the coating to be tested; a fixing mechanism for fixing the ice accretion mold; a clamping mechanism for clamping the ice accretion test piece; A linear stretching mechanism connected to the clamping mechanism provides a pulling force along the direction of the ice accretion test piece to separate the coating to be tested from the ice accretion on the surface of the ice accretion test piece; A sensor, one end of which is connected to the linear stretching mechanism and the other end of which is connected to the clamping mechanism, for collecting the real-time tension exerted on the clamping mechanism; The linear stretching mechanism includes a power assembly and a linear loading assembly. One end of the linear loading assembly is connected to the power assembly, and the other end is connected to the sensor. The power assembly is used to provide a pulling force along the direction of the ice accretion test piece. The linear loading assembly can move in the pulling direction under the action of the pulling force. The linear loading assembly includes a loading base, a linear slide rail is provided below the loading base, and the loading base is connected to the linear slide rail through a slider; The power assembly includes an electric structure or a manual structure, the electric structure is a motor or other electric device that can provide power; the manual structure includes a loading panel, a rotating flange bearing is provided on the loading panel, a linear loading bolt is rotatably connected to the rotating flange bearing, and the end of the linear loading bolt away from the rotating flange bearing is connected to the loading base through a U-shaped connecting frame. When the linear loading bolt is rotated, the U-shaped connecting frame can convert the rotational motion into linear motion, driving the loading base to slide.

2. The ice accretion shear adhesion testing device according to claim 1, characterized in that: The testing device further comprises a data acquisition device, which is connected to the sensor and is used to receive data collected by the sensor.

3. The ice accretion shear adhesion testing device according to claim 1, characterized in that: The clamping mechanism is connected to the sensor via a hook, the hook is made of elastic material, and the sensor is a tension sensor and / or a tension pressure sensor.

4. The ice accretion shear adhesion test device according to any one of claims 1 to 3, characterized in that: The fixing mechanism includes a guide base, the guide base is provided with a receiving cavity, the receiving cavity is used to receive the ice accretion specimen, and at least 1 / 3 of the ice accretion specimen extends out of the guide base, and a fixed block is detachably connected to the guide base, and the fixed block is used to fix the ice accretion mold; A fixing groove is provided on the side of the guide base, and the fixing groove is used to install a fixing block. When the fixing block is inserted into the fixing groove, the fixing block abuts against the outside of the ice accretion mold, fixing the ice accretion mold in the accommodating cavity to prevent the ice accretion mold from moving.

5. The ice accretion shear adhesion testing device according to any one of claims 1 to 3, characterized in that: The clamping mechanism includes a clamping base and a clamping cover plate connected to each other, wherein the clamping cover plate is provided with a clamping opening, the clamping opening facing the end of the ice accretion test piece extending from the fixed base, and the clamping opening is used to clamp the ice accretion test piece extending from the accommodating cavity; The depth of the clamping opening is greater than 1 / 2 of the length of the ice accretion test piece.

6. The ice accretion shear adhesion testing device according to claim 5, characterized in that: A clamping piece for fastening the ice accretion specimen may be provided at a position on the clamping cover corresponding to the clamping opening.

7. The ice accretion shear adhesion testing device according to any one of claims 1 to 3, characterized in that: A height adjustment gasket is provided at the bottom of the fixing mechanism, and the height adjustment gasket is used to adjust the height of the fixing mechanism and the clamping mechanism so that the ice accretion specimen and the tension transmitted by the ring are in the same plane; The testing device further comprises a testing base, and the fixing mechanism and the linear stretching mechanism are both arranged on the testing base.

8. A method for testing ice accretion shear adhesion using the testing device according to any one of claims 1 to 7, characterized in that: The steps include: S1, installing the ice accretion mold above the coating to be tested on the ice accretion specimen, injecting water to accrete ice, fixing it in a fixing mechanism, and connecting the ice accretion specimen to a clamping mechanism; S2. Rotate the loading platform bolts to drive the clamping mechanism away from the fixing mechanism until the ice accretion specimen separates from the ice accretion mold. Record the maximum tensile force F collected by the sensor and calculate the ice accretion shear force using the shear force formula τ = F / A, where A is the ice coverage area.

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