Abrasion resistance testing equipment and testing method for rotary blade

Abstract

The invention relates to the technical field of tool testing, and discloses a wear resistance testing device and method for a rotary blade, the device comprises a to-be-tested piece and a base, the to-be-tested piece is a rotary tool bit, the top end of the base is sleeved with a sound insulation testing cover, and the top end of the sound insulation testing cover is provided with an upper testing assembly; the upper measuring assembly comprises a sealing disc, a driving assembly, a tool bit mounting seat and a flat sweeping frame, the tool bit mounting seat is mounted on the outer wall of the bottom end of the sealing disc, the driving end of the driving assembly is connected with a linkage shaft, the linkage shaft is inserted into the tool bit mounting seat, and the flat sweeping frame is horizontally and slidably connected into the inner wall of the sealing disc. According to the invention, the input frequency of the test basin body is changed to form non-periodic vibration, the rotary tool bit is instantaneously impacted, the thrown height or distribution mode of test particles is observed, the impact load generated by the rotary tool bit under different conditions is evaluated, and under the fluid removal effect, the impact load of the rotary tool bit is evaluated. And the service life of the rotary tool bit under the continuous impact load can be visually tested.

Description

Technical Field

[0001] The invention relates to the field of tool testing, and more particularly to a wear resistance testing device and a testing method for a rotating blade. Background Art

[0002] Rotating blades are used to crush beans or other hard ingredients in equipment such as soymilk machines and wall breaking machines, but their service life is related to many factors.

[0003] Especially at the initial start-up or when the blade encounters larger beans or other hard ingredients, a momentary impact load will be generated. These suddenly applied forces will cause high pressure stress on the blade, which may cause the blade to become blunt or cause tiny cracks.

[0004] When the blade becomes blunt or has tiny cracks, the crushing effect will be poor during subsequent operations, and the beans or other hard ingredients will be stuck in the rotating cutter head, causing the driving motor of the rotating cutter head to overload, overheat and be damaged, affecting the use of equipment such as soymilk machines and wall breaking machines. Summary of the invention

[0005] The invention provides a wear resistance testing device and a testing method for a rotating blade, which solve the technical problems in the related art.

[0006] The present invention provides a wear resistance testing device for a rotating blade, comprising:

[0007] The test piece is a rotary cutter head, comprising a blade holder, a first blade and a second blade, the blade holder is connected to a connecting shaft, and the first blade and the second blade are sequentially overlapped and installed on the connecting shaft;

[0008] A base, a soundproof test cover is sleeved on the top of the base, an upper test assembly is installed on the top of the soundproof test cover, the upper test assembly includes a sealing disk, a driving assembly, a cutter head mounting seat and a flat sweeping frame, the cutter head mounting seat is mounted on the outer wall of the bottom end of the sealing disk, the driving end of the driving assembly is connected to a linkage shaft, the linkage shaft is inserted in the cutter head mounting seat, the flat sweeping frame is horizontally slidably connected to the inner wall of the sealing disk, one end of the flat sweeping frame is connected to the linkage shaft, and the blade holder of the test piece is installed on the bottom end of the linkage shaft;

[0009] There are ring-shaped leak holes in the sealing disk, and the hole diameter of the leak holes is between 0.5cm and 1.2cm;

[0010] During the test, the test particles are placed in the sealed disk, and the test particles of different sizes are swept into the corresponding leak holes by the flat sweeping frame. The test particles leak out from the leak holes and continuously impact the test piece from above.

[0011] The lower test piece is installed in the base, and the lower test piece includes a rotatable lifting seat, a sliding ring and a test basin body. The sliding ring is clamped on the outer edge of the top end of the test basin body, and the sliding ring is slidably connected to the inner wall of the sound insulation test cover. The movable end of the rotatable lifting seat is installed on the bottom outer wall of the test basin body. The test basin body includes a vibration basin and a vibration source. The vibration basin is a bucket structure and is fixed on the top outer wall by a sealing ring to make the vibration basin in the test basin body tensioned. The vibration end of the vibration source is connected to the bottom outer wall of the vibration basin.

[0012] Furthermore, an annular guide plate is provided on the outer side wall of the sound insulation test cover close to the cutter head mounting seat. When the test particles are emitted downward for testing, they are guided to the outer side wall of the test piece through the guide plate.

[0013] Furthermore, it also includes a planetary assembly, which is sleeved on the linkage shaft and includes a driving gear, a gear ring and a driven gear. An insertion shaft extends from the end of the flat sweeping frame, and the insertion shaft is inserted into the driven gear. The end of the flat sweeping frame is always abutted against the inner wall of the sealing disk. When the driving motor drives the linkage shaft to rotate, it also drives the driving gear to rotate. The driven gear makes a circular motion between the gear ring and the driving gear, and the flat sweeping frame connected thereto sweeps flatly inside the sealing disk.

[0014] Furthermore, a groove is provided on the outer edge of the sliding ring, a vertical convex strip is provided on the inner side wall of the sound insulation test cover, and the groove is clamped on the outer wall of the convex strip.

[0015] Furthermore, the test particles are placed in a test basin, and the signal end of the test basin is connected to an audio controller. The audio controller inputs signals of different frequencies into the test basin to move the test basin and drive the test particles to jump.

[0016] Furthermore, the driving assembly includes a driving motor and a reducer, the output shaft of the driving motor is connected to the reducer, the reducer is installed on the output shaft of the driving motor, and the output shaft of the reducer is connected to the linkage shaft.

[0017] Furthermore, a connecting thread is provided at the shaft end of the linkage shaft, and a plurality of limiting protrusions are distributed on the outer wall of the linkage shaft near the connecting thread. When the test piece is installed on the linkage shaft, the opening groove at the bottom end of the blade holder is clamped on the outer wall of the limiting protrusion.

[0018] Furthermore, a balance bearing is provided inside the flat sweeping frame, and when the piece to be tested is mounted on the bottom end of the linkage shaft, the blade holder is inserted into the balance bearing.

[0019] Furthermore, the test piece includes a blade holder, a first blade and a second blade. The blade holder is connected to a connecting shaft. The first blade and the second blade are superimposed and installed on the connecting shaft in sequence. The shaft end of the connecting shaft is locked by a locking bolt, and a support washer is provided at the connection between the first blade and the second blade.

[0020] The present invention also provides a method for testing the wear resistance of a rotating blade, which is tested by using the aforementioned wear resistance testing device for a rotating blade, and comprises the following steps:

[0021] S100, preparation before testing: install the test piece on the linkage shaft, place the test particles into the vibration basin and sealing plate of the test basin, and install the sound insulation test cover on the base;

[0022] S200, pre-test image acquisition: Before the test, images are acquired from the upward, left, right, front and rear views of the test piece, and the acquisition positions cover the blade surface and blade edge of the test piece;

[0023] S300, Test Item 1: During the test, the driving assembly drives the linkage shaft and the test piece on it to rotate, and at the same time, the linkage shaft drives the sweeping frame to rotate in the sealing disk, so that the test particles in the sealing disk are swept into the leak hole and fall, impacting the test piece;

[0024] S400, test item 2: based on step S300, a signal is further input to the test basin, and different frequency signals are input to achieve different heights of jumping of the test particles, and the knife face and the blade of the test piece are tested separately or both are tested simultaneously;

[0025] S500, result comparison: set a set of test cycles for the above two test items. After the test, take photos of the position of the test piece that is consistent with the initial photo taking position, compare with the initial photo taking photo, and observe whether there is obvious damage on the blade and the blade surface.

[0026] The beneficial effects of the present invention are:

[0027] In order to simulate the behavior of beans or hard materials under the impact of a rotating cutter head, the present invention uses a test basin to drive test particles, which is an indirect test method for studying the influence of vibration on particulate matter. By changing the input frequency of the test basin, non-periodic vibration is formed, which instantaneously impacts the rotating cutter head. By observing the height or distribution pattern of the test particles thrown up, the impact load generated by the rotating cutter head under different conditions is evaluated. By removing the fluid effect in the actual environment, the service life of the rotating cutter head under continuous impact load is intuitively tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a front view of a wear resistance testing device for a rotating blade of the present invention;

[0029] Figure 2 This is a test effect diagram of a wear resistance test device for a rotating blade of the present invention;

[0030] Figure 3 It is a schematic diagram of the connection structure between a test component, a drive component and a test piece of a wear resistance test device for a rotating blade of the present invention;

[0031] Figure 4 The present invention Figure 3 Schematic diagram of the connection structure between the linkage shaft and the test piece;

[0032] Figure 5 The present invention Figure 1 Schematic diagram of the structure of the test basin;

[0033] Figure 6 The present invention Figure 1 Assembly drawing of the test piece;

[0034] Figure 7 The present invention discloses a relationship table between input frequency and test particle throwing height in a wear resistance testing device for a rotating blade.

[0035] In the figure: 100, base; 110, rotatable lifting seat; 200, test basin body; 210, sliding ring; 220, vibration basin; 230, convex strip; 240, vibration source; 300, sound insulation test cover; 310, guide plate; 400, upper test assembly; 410, cutter head mounting seat; 420, protective cover; 430, sealing plate; 440, linkage shaft; 441, limiting protrusion; 450, leak hole; 460, flat sweeping frame; 470, gear ring; 480, driven gear; 490, driving gear; 500, driving assembly; 510, driving motor; 520, reducer; 600, test particles; 700, piece to be tested; 710, blade holder; 720, first blade; 730, supporting washer; 740, second blade; 750, locking bolt. DETAILED DESCRIPTION

[0036] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0037] like Figure 1-Figure 6As shown, a wear resistance testing device for a rotating blade includes a test piece 700, which is a rotating blade head. The rotating blade head can be a main rotating crushing part of a soymilk machine, a wall breaking machine and the like. The test piece 700 includes a blade holder 710, a first blade 720 and a second blade 740. A connecting shaft is connected to the blade holder 710. The first blade 720 and the second blade 740 are sequentially overlapped and installed on the connecting shaft. The shaft end of the connecting shaft is locked by a locking bolt 750. A supporting washer 730 is provided at the connection between the first blade 720 and the second blade 740.

[0038] In one embodiment of the present invention, Figure 6 As shown, the first blade 720 is bent downward at both ends, and both sides of both ends are blades, and the second blade 740 is a cross-shaped structure, and blades are provided on four sides of the second blade 740, and the blade part is bent upward;

[0039] A base 100, a soundproof test cover 300 is sleeved on the top of the base 100, an upper test assembly 400 is installed on the top of the soundproof test cover 300, and the upper test assembly includes a sealing disk 430, a driving assembly 500, a cutter head mounting seat 410 and a flat sweeping frame 460, and the cutter head mounting seat 410 is installed on the outer wall of the bottom end of the sealing disk 430;

[0040] In one embodiment of the present invention, a ring-shaped guide plate 310 is provided on the outer side wall of the soundproof test cover 300 near the tool head mounting seat 410. When the test particles 600 are emitted downward for testing, they are guided to the outer side wall of the test piece 700 by the guide plate 310.

[0041] The driving assembly 500 includes a driving motor 510 and a speed reducer 520. The output shaft of the driving motor 510 is connected to the speed reducer 520. The speed reducer 520 is installed on the output shaft of the driving motor 510. The output shaft of the speed reducer 520 is connected to a linkage shaft 440. The linkage shaft 440 is inserted into the cutter head mounting seat 410. A planetary assembly is sleeved on the linkage shaft 440, including a driving gear 490, a gear ring 470 and a driven gear 480. An insertion shaft extends from the end of the flat sweeping frame 460, and the insertion shaft is inserted into the driven gear 480. The end of the flat sweeping frame 460 is always abutted against the inner wall of the sealing disk 430. When the driving motor 510 drives the linkage shaft 440 to rotate, it also drives the driving gear 490 to rotate. The driven gear 480 makes a circular motion between the gear ring 470 and the driving gear 490, and the flat sweeping frame 460 connected thereto sweeps flatly in the sealing disk 430.

[0042] In one embodiment of the present invention, the shaft end of the linkage shaft 440 is provided with a connecting thread, and a plurality of limiting protrusions 441 are distributed on the outer wall of the linkage shaft 440 near the connecting thread. When the test piece 700 is installed on the linkage shaft 440, the opening groove at the bottom end of the blade holder 710 is clamped on the outer wall of the limiting protrusion 441.

[0043] A balance bearing is provided inside the flat sweeping frame 460. When the test piece 700 is mounted on the bottom end of the linkage shaft 440, the blade holder 710 is inserted into the balance bearing.

[0044] The sealing disk 430 is provided with leak holes 450 distributed in an annular pattern, and the hole diameter of the leak holes 450 is between 0.5 cm and 1.2 cm;

[0045] In one embodiment of the present invention, a protective cover 420 is provided on the top of the sealing cover, and an axle-through hole is provided on the top outer wall of the protective cover 420;

[0046] That is, during the test process, the test particles 600 are placed in the sealing disk 430, and the test particles 600 of different sizes are swept into the corresponding leak holes 450 by the flat sweeping frame 460. The test particles 600 leak from the leak holes 450 and continuously impact the test piece 700 from above.

[0047] The lower test piece is installed in the base 100, and includes a rotatable lifting seat 110, a sliding ring 210 and a test basin 200. The sliding ring 210 is clamped on the outer edge of the top of the test basin 200, and the sliding ring 210 is slidably connected to the inner wall of the sound insulation test cover 300. The movable end of the rotatable lifting seat 110 is installed on the outer wall of the bottom end of the test basin 200;

[0048] In one embodiment of the present invention, a groove is provided on the outer edge of the sliding ring 210, a vertical convex strip 230 is provided on the inner side wall of the sound insulation test cover 300, and the groove is clamped on the outer wall of the convex strip 230;

[0049] The test basin 200 includes a vibration basin 220 and a vibration source 240. The vibration basin 220 is made of leather and has a bucket structure. The outer edge of the top end is fixed by a sealing ring to tighten the vibration basin 220 in the test basin 200. The vibration end of the vibration source 240 is connected to the outer wall of the bottom end of the vibration basin 220.

[0050] The test particle 600 is placed in the test basin 200. The signal end of the test basin 200 is connected to an audio controller. The audio controller inputs signal segments of different frequencies into the test basin 200, so that the test basin 200 drives the test particle 600 to jump.

[0051] The jumping of the test particle 600 is related to the input frequency signal segment. When the input frequency increases, the jumping height of the test particle 600 is higher. Similarly, when the input frequency decreases, the jumping height of the test particle 600 becomes lower.

[0052] In one embodiment of the present invention, the test particles 600 may impact the blade face and the blade edge of the rotating blade.

[0053] The embodiment of the present invention also provides a wear resistance test method for a rotating blade, comprising the following steps:

[0054] The test piece 700 is mounted on the linkage shaft 440, the test particles 600 are placed in the vibration basin 220 and the sealing plate 430 of the test basin body 200, and the sound insulation test cover 300 is mounted on the base 100;

[0055] The test piece 700 is mounted on the linkage shaft 440 by threaded connection, the notch position of the blade holder 710 is clamped on the limiting protrusion 441, and the blade holder 710 is stably inserted in the blade head mounting seat 410;

[0056] At the same time, before the test, the bottom (looking up) and four sides of the test piece 700 are photographed (the best is the left view, right view, front view and rear view) to ensure that the blade surface and blade part of the test piece 700 are completely covered;

[0057] Test item 1: Power on for testing. During the test, the driving assembly 500 drives the linkage shaft 440 and the test piece 700 thereon to rotate, and at the same time, the linkage shaft 440 drives the sweeping frame 460 to rotate in the sealing disk 430, so that the test particles 600 in the sealing disk 430 are swept to fall into the leak hole 450 and impact the test piece 700;

[0058] During the test, when the driving motor 510 drives the linkage shaft 440 to rotate, the driving gear 490 is driven to rotate, and the driven gear 480 rotates between the gear ring 470 and the driving gear 490, and at the same time drives the horizontal sweeping frame 460 to sweep horizontally, driving the test particles 600 to fall through the leak hole 450, and the test particles 600 are guided to the outer wall of the test piece 700 through the guide plate 310;

[0059] Test item 2: Based on test item 1, a signal is input to the test basin 200, and different frequency signals are input to achieve different height jumps of the test particles 600, so that the knife surface and the blade of the test piece 700 can be tested separately or both can be tested simultaneously;

[0060] During the test, the initial height of the rotatable lifting seat 110 can be adjusted, and the rotatable lifting seat 110 can be used to drive the test particle 600 to perform a composite motion of rotation and upward jumping;

[0061] The adjustment is carried out by the rotatable lifting seat 110 driving the test basin 200 and the sliding ring 210 to slide along the inner wall of the sound insulation test cover 300;

[0062] The rotating process is that the test basin 200 rotates in the sliding ring 210, and the test basin 200 can perform a composite motion of rotation and vibration.

[0063] The above two test items are set to a set of test cycles (for example, 5 minutes as one cycle). After the test, the bottom and four sides of the test piece 700 are photographed (the photographing position is consistent with the initial photographing position), and compared with the initial photographing photos to observe whether there is obvious damage on the blade and the blade surface;

[0064] In one embodiment of the present invention, the test particle 600 is a uniform spherical shape with a diameter of about 5-12 mm (similar to the size of a soybean) and a density of.

[0065] The vibration of the test basin 200 can be approximated as simple harmonic motion. In each cycle, the maximum displacement (vibration height) of the test basin 200 is known. When the test particle 600 contacts the surface of the test basin 200, it is a completely elastic collision, that is, the energy loss can be ignored.

[0066] The relationship expression is as follows:

[0067] Where: is the maximum height to which the test particle 600 is thrown, is the maximum displacement (vibration height) of the test basin 200, where is the angular frequency, is the input frequency, and is the acceleration due to gravity, which is approximately 9.81 m / s 2 .

[0068] like Figure 7 As shown in the table, the influence of the maximum displacement (vibration height) at different input frequencies on the maximum height of the test particle 600 thrown up is shown, assuming that A=1mm; as the frequency increases, the height of the particle thrown up increases significantly, but in reality, when the frequency is very high, due to other physical limitations (such as air resistance, inelastic collision, etc.), the actual result may not increase as shown in the table, but it can meet the test requirements.

[0069] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A wear resistance testing device for a rotating blade, characterized in that: include: The test piece (700) is a rotating blade head, and comprises a blade holder (710), a first blade (720) and a second blade (740). The blade holder (710) is connected to a connecting shaft, and the first blade (720) and the second blade (740) are sequentially stacked and mounted on the connecting shaft; A base (100), wherein a soundproof test cover (300) is sleeved on the top of the base (100), an upper test assembly (400) is installed on the top of the soundproof test cover (300), and the upper test assembly comprises a sealing disk (430), a driving assembly (500), a cutter head mounting seat (410) and a flat sweeping frame (460), wherein the cutter head mounting seat (410) is mounted on the outer wall of the bottom end of the sealing disk (430), a driving end of the driving assembly (500) is connected to a linkage shaft (440), and the linkage shaft (440) is inserted in the cutter head mounting seat (410), and the flat sweeping frame (460) is horizontally slidably connected to the inner wall of the sealing disk (430), and one end of the flat sweeping frame (460) is connected to the linkage shaft (440), and a blade frame (710) of a test piece (700) is mounted on the bottom end of the linkage shaft (440); Leak holes (450) are arranged in an annular pattern in the sealing disk (430), and the diameter of the leak holes (450) is between 0.5 cm and 1.2 cm; During the test, the test particles (600) are placed in the sealing disk (430), and the test particles (600) of different sizes are swept into the corresponding leak holes (450) by the flat sweeping frame (460). The test particles (600) leak out of the leak holes (450) and continuously impact the test piece (700) from above. A lower test piece is installed in a base (100), the lower test piece comprises a rotatable lifting seat (110), a sliding ring (210) and a test basin body (200), the sliding ring (210) is clamped on the outer edge of the top end of the test basin body (200), the sliding ring (210) is slidably connected to the inner wall of the sound insulation test cover (300), the movable end of the rotatable lifting seat (110) is installed on the outer wall of the bottom end of the test basin body (200), the test basin body (200) comprises a vibration basin (220) and a vibration source (240), the vibration basin (220) is in a bucket structure, and is fixed on the outer edge of the top end thereof by a sealing ring, so that the vibration basin (220) in the test basin body (200) is tensioned, and the vibration end of the vibration source (240) is connected to the outer wall of the bottom end of the vibration basin (220).

2. The wear resistance testing device for a rotating blade according to claim 1, characterized in that: An annular guide plate (310) is provided on the outer side wall of the soundproof test cover (300) close to the cutter head mounting seat (410); when the test particles (600) are emitted downward for testing, they are guided to the outer side wall of the object to be tested (700) by the guide plate (310).

3. The wear resistance testing device for a rotating blade according to claim 2, characterized in that: The invention also includes a planetary assembly, which is sleeved on the linkage shaft (440) and includes a driving gear (490), a gear ring (470) and a driven gear (480). An insertion shaft extends from the end of the flat sweeping frame (460), and the insertion shaft is inserted into the driven gear (480). The end of the flat sweeping frame (460) is always abutted against the inner wall of the sealing disk (430). When the driving motor (510) drives the linkage shaft (440) to rotate, the driving gear (490) is also driven to rotate. The driven gear (480) performs a circular motion between the gear ring (470) and the driving gear (490), and the flat sweeping frame (460) connected thereto performs a flat sweep inside the sealing disk (430).

4. The wear resistance testing device for a rotating blade according to claim 3, characterized in that: The outer edge of the sliding ring (210) is provided with a groove, and the inner side wall of the sound insulation test cover (300) is provided with a vertical convex strip (230), and the groove is clamped on the outer wall of the convex strip (230).

5. The wear resistance testing device for a rotating blade according to claim 4, characterized in that: The test particles (600) are placed in a test basin (200); a signal end of the test basin (200) is connected to an audio controller; the audio controller inputs signals of different frequencies into the test basin (200), thereby causing the test basin (200) to move and drive the test particles (600) to jump.

6. The wear resistance testing device for a rotating blade according to claim 5, characterized in that: The driving assembly (500) comprises a driving motor (510) and a reducer (520); the output shaft of the driving motor (510) is connected to the reducer (520); the reducer (520) is mounted on the output shaft of the driving motor (510); and the output shaft of the reducer (520) is connected to the linkage shaft (440).

7. The wear resistance testing device for a rotating blade according to claim 6, characterized in that: The shaft end of the linkage shaft (440) is provided with a connecting thread, and a plurality of limiting protrusions (441) are distributed on the outer wall of the linkage shaft (440) close to the connecting thread. When the test piece (700) is mounted on the linkage shaft (440), the opening groove at the bottom end of the blade holder (710) is clamped on the outer wall of the limiting protrusion (441).

8. The wear resistance testing device for a rotating blade according to claim 7, characterized in that: A balance bearing is provided inside the flat sweeping frame (460), and when the to-be-tested piece (700) is mounted on the bottom end of the linkage shaft (440), the blade frame (710) is inserted into the balance bearing.

9. The wear resistance testing device for a rotating blade according to claim 8, characterized in that: The test piece (700) comprises a blade holder (710), a first blade (720) and a second blade (740); the blade holder (710) is connected to a connecting shaft; the first blade (720) and the second blade (740) are sequentially overlapped and installed on the connecting shaft; the shaft end of the connecting shaft is locked by a locking bolt (750); and a supporting washer (730) is provided at the connection between the first blade (720) and the second blade (740).

10. A method for testing the wear resistance of a rotating blade, characterized in that: The test is carried out by a wear resistance testing device for a rotating blade as described in any one of claims 1 to 9, comprising the following steps: S100, preparation before testing: installing the test piece (700) on the linkage shaft (440), placing the test particles (600) in the vibration basin (220) and the sealing disk (430) of the test basin body (200), and installing the sound insulation test cover (300) on the base (100); S200, collecting images before testing: before testing, collecting images of the test piece (700) in the upward, left, right, front and rear views, with the image collection positions covering the blade surface and blade edge of the test piece (700); S300, test item 1: during the test, the driving assembly (500) drives the linkage shaft (440) and the test piece (700) thereon to rotate, and at the same time the linkage shaft (440) drives the sweeping frame (460) to rotate inside the sealing disk (430), so that the test particles (600) inside the sealing disk (430) are swept to fall into the leak hole (450) and impact the test piece (700); S400, test item 2: based on step S300, a signal is further input to the test basin (200), and different frequency signals are input to achieve different heights of jumping of the test particles (600), and the blade surface and the blade edge of the test piece (700) are tested separately or both are tested simultaneously; S500, result comparison: set a set of test cycles for the above two test items. After the test, take a picture of the test piece (700) at a position consistent with the initial picture taking position, and compare it with the initial picture taking photo to observe whether there is obvious damage on the blade and the blade surface.

Images