Universal dynamic balance testing machine and dynamic balance testing method

Abstract

The invention relates to the technical field of dynamic balance testing, and particularly discloses a universal dynamic balance testing machine and a dynamic balance testing method.The universal dynamic balance testing machine is provided with a first bottom wheel and a second bottom wheel, and the distance between the first bottom wheel and the second bottom wheel can be adjusted in the y direction; one of the top wheels can be moved to the position above the perpendicular bisector of the first bottom wheel and the second bottom wheel, then the position of the top wheel is adjusted along the perpendicular bisector in a lifting mode till the top wheel makes contact with the first shaft part, then the radius difference between the first shaft part and the second shaft part is measured, and the height of the top wheel above the second shaft part is adjusted according to the radius difference. The distance between a first bottom wheel used for supporting a second shaft part and a second bottom wheel is adjusted till the second shaft part makes contact with a top wheel above the second shaft part; therefore, the tested test result can form a relatively stable waveform, and the peak value characteristic is obvious; and the first bottom wheel and the second bottom wheel corresponding to the first shaft part and the second shaft part are pressed consistently, so that the condition that one side is damaged due to long-term pressing is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic balancing test, and in particular to a universal dynamic balancing test machine and a dynamic balancing test method. Background Art

[0002] As an important part of the mechanical system, the vibration caused by the unbalance of the rotor will lead to equipment vibration, noise and mechanism damage. Due to factors such as uneven materials or blank defects, errors caused by processing and assembly, and asymmetric geometric shapes in design, the various rotating bodies in the project cannot offset each other when the rotating body rotates. The centrifugal inertia force acts on the machinery and other mechanisms through the bearings, causing vibration, noise, accelerated bearing wear, shortened mechanical life, and in severe cases, destructive accidents.

[0003] The dynamic balancing test is usually performed using a dynamic balancing test machine currently available on the market. In the case where the diameters of the first shaft portion 51 and the second shaft portion 52 are different, in the actual test (Comparative Example 2), Figure 4 and Figure 5 As shown, if the bottom wheels on both sides are not adjusted, the axis line of the test piece 50 will deviate from the reference line. Figure 6 The test result will show that the vibration amplitude is too large and the peak value is not obvious. When using a conventional dynamic balancing tester, the staff usually relies on their experience to continuously adjust the placement height of the first shaft portion 51 and the second shaft portion 52, which has low adjustment efficiency and cannot ensure accuracy.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a universal dynamic balancing tester and a dynamic balancing test method to solve the problems of low adjustment efficiency and low adjustment accuracy of the dynamic balancing tester in the prior art.

[0006] A universal dynamic balancing test machine, comprising: Bracket; A driving mechanism, disposed on the bracket, for driving the test piece to rotate; Two supporting mechanisms are sequentially arranged at one side of the driving end of the driving mechanism along the x-direction, and are used to support the first shaft portion and the second shaft portion of the test piece respectively, and the supporting mechanism comprises a supporting plate arranged on the bracket, and a first bottom wheel and a second bottom wheel arranged on the supporting plate and capable of adjusting the spacing along the y-direction; The two pressing mechanisms include a top wheel which can be moved above the midpoint perpendicular line between the first bottom wheel and the second bottom wheel and can be raised and lowered to adjust the position along the midpoint perpendicular line.

[0007] Specifically, the bracket is provided with a first guide rail extending along the x-direction, and the driving mechanism and the support plate can both slide along the first guide rail to adjust their positions.

[0008] Specifically, the support plate is provided with a second guide rail extending along the y direction, and the support mechanism also includes a first sliding frame and a second sliding frame. The first bottom wheel is rotatably arranged on the first sliding frame, and the second bottom wheel is rotatably arranged on the second sliding frame. The first sliding frame and the second sliding frame can both slide along the second guide rail to adjust their positions.

[0009] Specifically, the support mechanism also includes a synchronous adjustment component, which includes a first rack fixed to the first sliding frame, a second rack fixed to the second sliding frame, a right-angle frame fixed to the support plate, a gear rotatably arranged on the right-angle frame, and a first driving device for driving any one of the first rack and the second rack along the y direction.

[0010] Specifically, the first driving device is a pneumatic cylinder, an electric cylinder or a screw module.

[0011] Specifically, the pressing mechanism also includes a flipping assembly, which includes a first column fixed on both sides of the support plate along the y direction, a second column, a top plate rotatably arranged on the first column, a second driving device fixed on the top plate, and a slider connected to the output end of the second driving device. The top wheel is rotatably arranged on the slider, and the swinging end of the top plate is locked with the second column.

[0012] Specifically, a pressure sensor for sensing the pressure of the top wheel is provided in the slider.

[0013] Specifically, the driving mechanism includes a base, a motor fixed on the base, and a sleeve connected to an output shaft of the motor, wherein the sleeve is used to connect the test piece.

[0014] Specifically, the second bottom wheel is a double-layer wheel set with an annular interval.

[0015] A dynamic balancing test method, using the universal dynamic balancing test machine, comprises the following steps: S1: placing the first shaft portion and the second shaft portion of the test piece on the first bottom wheels and the second bottom wheels of the two supporting mechanisms respectively; S2: moving the top wheel of the pressing mechanism located on the first shaft portion to above the midpoint perpendicular line between the first bottom wheel and the second bottom wheel, and adjusting the position of the top wheel by lifting and lowering along the midpoint perpendicular line until the top wheel contacts the first shaft portion; S3 measures the radius difference between the first shaft portion and the second shaft portion; S4 adjusting the height of the top wheel above the second shaft portion according to the radius difference; S5: adjusting the distance between the first bottom wheel and the second bottom wheel for supporting the second shaft portion until the second shaft portion contacts the top wheel above it, and at this time, the axes of the first shaft portion and the second shaft portion are parallel to the horizontal plane; S6: Connect the test piece to the driving end of the driving mechanism, start the driving mechanism, and perform a dynamic balance test on the test piece.

[0016] Beneficial effects of the present invention: The universal dynamic balancing test machine and the dynamic balancing test method of the present invention are provided with a first bottom wheel and a second bottom wheel whose spacing can be adjusted along the y direction. If the radii of the first shaft portion and the second shaft portion are inconsistent, the top wheel of one of the pressing mechanisms can be moved to above the midpoint perpendicular line between the first bottom wheel and the second bottom wheel, and then the position of the top wheel can be adjusted along the midpoint perpendicular line until the top wheel contacts the first shaft portion, and then the radius difference between the first shaft portion and the second shaft portion is measured, and the height of the top wheel above the second shaft portion is adjusted according to the radius difference, and then the spacing between the first bottom wheel and the second bottom wheel used for supporting the second shaft portion is adjusted until the second shaft portion contacts the top wheel above it, and at this time, the axis of the first shaft portion and the second shaft portion are parallel to the horizontal plane; finally, the first shaft portion is connected to the driving end of the driving mechanism, the driving mechanism is started, and the test piece is subjected to dynamic balancing detection; the axis of the first shaft portion and the second shaft portion can be accurately adjusted to be parallel to the horizontal plane, so that the test result measured will form a relatively stable waveform with obvious peak characteristics; and the first bottom wheel and the second bottom wheel corresponding to the first shaft portion and the second shaft portion can be pressed in the same manner, so as to avoid damage caused by long-term pressure on one side. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the test piece with a weight in Comparative Example 1; Figure 2 Schematic diagram of the bottom wheel and the test piece with weight in Comparative Example 1; Figure 3 A schematic diagram of the test results of the test piece with a weight in Comparative Example 1; Figure 4 Schematic diagram of the test piece with a weight in Comparative Example 2; Figure 5 Schematic diagram of the bottom wheel and the test piece with weight in Comparative Example 2; Figure 6 This is a schematic diagram of the test results of the test piece with a weight in Comparative Example 2; Figure 7 is a schematic diagram of a test piece without a weight in Comparative Example 3; Figure 8A schematic diagram of the test results of the test piece without a weight in Comparative Example 3; Fig. 9 is a schematic diagram of the dynamic balancing test method of this embodiment; Fig.10 The three-dimensional structure of the universal dynamic balancing tester of this embodiment is shown in FIG. Figure 1 ; Fig.11 The three-dimensional structure of the universal dynamic balancing tester of this embodiment is shown in FIG. Figure 2 ; Fig.12 The three-dimensional support structure of the present embodiment Figure 1 ; Fig.13 The three-dimensional support structure of the present embodiment Figure 2 ; Fig.14 is a top view of the universal dynamic balancing tester of this embodiment; Fig.15 for Fig.14 Sectional view along line AA; Fig.16 for Fig.15 Enlarged view of part B.

[0018] The accompanying drawings are marked as follows: bracket 10, driving mechanism 20, test piece 50, supporting mechanism 30, first shaft portion 51, second shaft portion 52, supporting plate 31, first bottom wheel 32, second bottom wheel 33, pressing mechanism 40, top wheel 42, first guide rail 11, second guide rail 34, first sliding frame 35, second sliding frame 36, synchronous adjustment assembly 37, first rack 371, second rack 372, right-angle frame 373, gear 374, first driving device 375, flipping assembly 43, first column 431, second column 432, top plate 433, second driving device 434, slider 435, pressure sensor 436, base 21, motor 22, sleeve 23, stand 60, support leg 61, detection sensing module 62, weight 53, and latch 70. DETAILED DESCRIPTION

[0019] The present invention provides a universal dynamic balancing test machine and a dynamic balancing test method. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] Comparative Example 1 Please refer to Figures 1 to 3 As shown, in Comparative Example 1, a test piece 50 with a weight 53 is used to simulate the unbalanced condition of a rotating body. When the test piece 50 with a weight 53 is placed in a conventional dynamic balancing tester for dynamic balancing test, the center lines of the first shaft portion 51 and the second shaft portion 52 of the test piece 50 are adjusted to coincide with the center lines of the first shaft portion 51 and the second shaft portion 52 of the test piece 50. Figure 2 When the test piece 50 is rotated during the test, as shown in FIG. Figure 1 As shown, due to the centrifugal inertial force generated by the weight 53, the eccentric line formed by the test piece 50 will intersect with the reference line. Figure 3 As shown in the figure, a relatively stable waveform amplitude will be formed, and the peak characteristics are obvious. In the subsequent data processing stage, the data collected by the dynamic balancing tester is refreshed in real time and displayed on the screen to observe the status of the rotor speed, amplitude, and phase. When the amplitude data tends to be stable, it can be judged that the test piece 50 has reached a stable state, which means that the collection has been completed; and the peak value can facilitate the staff to locate and judge the unbalanced position.

[0022] Comparative Example 2 Please refer to Figures 4 to 6 As shown, a test piece 50 with a weight 53 is placed in a conventional dynamic balancing tester for dynamic balancing test. The first shaft portion 51 and the second shaft portion 52 of the test piece 50 have different diameters, such as Figure 5 As shown, in this comparative example, the bottom wheels on both sides are not adjusted, and the test piece 50 is rotated during the test. Figure 4 As shown, the axis of the test piece 50 deviates from the reference line. Figure 6 The test results will show that the vibration amplitude is too large, and the peak value is not obvious. In the subsequent data processing stage, the dynamic balancing tester refreshes the collected data in real time and displays it on the screen to observe the status of the rotor speed, amplitude, and phase. When the amplitude data tends to be stable, it can be judged that the test piece 50 has reached a stable state, which means that the collection has been completed. If the left and right balance of the first shaft 51 and the second shaft 52 of the test piece 50 is not adjusted well, the vibration amplitude is too large, making it difficult for the machine to judge whether the test piece 50 is stable, and it is difficult to collect data; and the peak value is not obvious, so it is difficult for the staff to judge the imbalance position.

[0023] Comparative Example 3 Please refer to Figure 7 and to Figure 8 As shown, a test piece 50 without a weight is placed in a conventional dynamic balancing tester for dynamic balancing test. The first shaft portion 51 and the second shaft portion 52 of the test piece 50 have different diameters. In this comparative example, the bottom wheels on both sides are not adjusted. When the test piece 50 is rotated for testing, Figure 8 The test results will show that the vibration amplitude is too large.

[0024] Therefore, when the first shaft portion 51 and the second shaft portion 52 of the test piece 50 have different diameters, it is necessary to ensure that the axes of the first shaft portion 51 and the second shaft portion 52 are parallel to the horizontal line (as shown in Comparative Example 1). Only then can the data collected after the dynamic balancing test accurately reflect the non-dynamically balanced position of the test piece 50. If the axes of the first shaft portion 51 and the second shaft portion 52 are not parallel to the horizontal line (as shown in Comparative Examples 2 and 3), then regardless of whether the test piece 50 itself is dynamically balanced, the data collected after the dynamic balancing test cannot reflect the dynamic balance condition of the test piece 50.

[0025] In order to improve the above-mentioned problems, the present invention provides a universal dynamic balancing testing machine.

[0026] Example like Figures 9 to 16 As shown, this embodiment discloses a universal dynamic balancing test machine, comprising: Bracket 10; The driving mechanism 20 is provided on the bracket 10 and is used to drive the test piece 50 to rotate; Two support mechanisms 30 are sequentially arranged at one side of the driving end of the driving mechanism 20 along the x-direction, and are used to support the first shaft portion 51 and the second shaft portion 52 of the test piece 50. The support mechanism 30 includes a support plate 31 arranged on the bracket 10, and a first bottom wheel 32 and a second bottom wheel 33 arranged on the support plate 31 and capable of adjusting the spacing along the y-direction; The two pressing mechanisms 40 include a top wheel 42 that can move to above the midline of the first bottom wheel 32 and the second bottom wheel 33 and can be raised and lowered along the midline to adjust the position.

[0027] The universal dynamic balancing tester disclosed in this embodiment, before performing a dynamic balancing test, firstly places the first shaft portion 51 and the second shaft portion 52 of the test piece 50 on the "V"-shaped groove formed by the first bottom wheel 32 and the second bottom wheel 33 of the two support mechanisms 30, respectively. By setting the first bottom wheel 32 and the second bottom wheel 33 that can adjust the spacing along the y direction, if the radii of the first shaft portion 51 and the second shaft portion 52 are inconsistent, the top wheel 42 of the pressing mechanism 40 located above the first shaft portion 51 can be moved to above the midpoint perpendicular line between the first bottom wheel 32 and the second bottom wheel 33, and then the position of the top wheel 42 can be adjusted by lifting and lowering along the midpoint perpendicular line until the top wheel 42 contacts the first shaft portion 51, and then the measurement is performed. The radius difference between the first shaft portion 51 and the second shaft portion 52 is adjusted according to the radius difference, and then the distance between the first bottom wheel 32 and the second bottom wheel 33 used to support the second shaft portion 52 is adjusted until the second shaft portion 52 contacts the top wheel 42 above it, and at this time, the axis of the first shaft portion 51 and the second shaft portion 52 are parallel to the horizontal plane; finally, the test piece 50 is connected to the driving end of the driving mechanism 20, the driving mechanism 20 is started, and the dynamic balance detection of the test piece 50 is performed; through such a setting, the axis of the first shaft portion 51 and the second shaft portion 52 can be accurately adjusted to be parallel to the horizontal plane, so that the test results measured can refer to the comparative example 1 Figure 3 As shown in FIG. 1 , a relatively stable waveform is formed in the test result diagram, and the peak characteristics are obvious. In addition, the center lines of the first shaft portion 51 and the second shaft portion 52 are Fig. 9 The horizontal lines shown are parallel, and the first bottom wheel 32 and the second bottom wheel 33 corresponding to the first shaft portion 51 and the second shaft portion 52 can be pressed in the same manner, thereby avoiding damage due to long-term pressure on one side.

[0028] For further information, please refer to Fig.10 The bracket 10 is provided with a first guide rail 11 extending along the x direction. The driving mechanism 20 and the support plate 31 can both slide along the first guide rail 11 to adjust their positions. The positions of the driving mechanism 20 and the support plate 31 can be adjusted according to different models of test pieces 50 to adapt to different test requirements.

[0029] For further information, please refer to Figure 12 to Figure 14 A second guide rail 34 extending along the y direction is provided on the support plate 31, and the support mechanism 30 also includes a first sliding frame 35 and a second sliding frame 36. The first bottom wheel 32 is rotatably provided on the first sliding frame 35, and the second bottom wheel 33 is rotatably provided on the second sliding frame 36. Both the first sliding frame 35 and the second sliding frame 36 can slide along the second guide rail 34 to adjust their positions. By providing the second guide rail 34, the sliding stability of the first sliding frame 35 and the second sliding frame 36 along the y direction is improved, and at the same time, the first sliding frame 35 and the second sliding frame 36 move linearly along the y direction, thereby preventing the first sliding frame 35 and the second sliding frame 36 from deviating from the support plate 31 when adjusting their positions.

[0030] Please refer to Fig.12 and Fig.13 The support mechanism 30 of this embodiment also includes a synchronous adjustment component 37. By setting the synchronous adjustment component 37, the first bottom wheel 32 and the second bottom wheel 33 can move synchronously in the opposite or opposite directions along the y direction. Therefore, the mid-points of the first bottom wheel 32 and the second bottom wheel 33 can always be in the same position, simplifying the structure.

[0031] Furthermore, the synchronous adjustment assembly 37 includes a first rack 371 fixed to the first sliding frame 35, a second rack 372 fixed to the second sliding frame 36, a right angle frame 373 fixed to the support plate 31, a gear 374 rotatably arranged on the right angle frame 373, and a first driving device 375 for driving any one of the first rack 371 and the second rack 372 along the y direction. The first driving device 375 of this embodiment adopts a screw module, which includes a motor, a screw connected to the motor output shaft, a sleeve matched with the screw thread, and a second gear. One end of the rack 372 along its length direction is connected to a vertical plate, and the shaft sleeve is fixedly connected to the vertical plate. When the motor is started, the shaft sleeve slides along the screw rod, thereby using the shaft sleeve to push or pull the vertical plate, so that the second rack 372 moves along the y direction, and under the meshing action of the gear 374, the first rack 371 is driven to move synchronously in the opposite or reverse direction along the y direction. The first rack 371 is fixedly connected to the first sliding frame 35, and the second rack 372 is fixedly connected to the second sliding frame 36. Therefore, the first bottom wheel 32 and the second bottom wheel 33 are driven to move synchronously in the opposite or reverse direction along the y direction.

[0032] The first drive device 375 of this embodiment adopts a screw module. The screw module has high control accuracy and fast response speed, and can meet the high-precision adjustment of the distance between the first bottom wheel 32 and the second bottom wheel 33. Of course, using a screw module as the first drive device 375 is only one of the better implementations. In other embodiments, the first drive device 375 can also use a cylinder, an electric cylinder, etc., and is not limited to a screw module.

[0033] Please refer to Fig.10 and Fig.11 The pressing mechanism 40 of this embodiment also includes a flip assembly 43, which includes a first column 431 fixed to both sides of the support plate 31 along the y direction, a second column 432, a top plate 433 rotatably arranged on the first column 431, a second driving device 434 fixed on the top plate 433, and a slider 435 connected to the output end of the second driving device 434. The top wheel 42 is rotatably arranged on the slider 435, and the swing end of the top plate 433 is locked and connected with the second column 432. Before placing the test piece 50, first flip the top wheel 42 and the flip assembly 43 to the position as shown in the figure. Fig.11In the state shown in FIG. 1 , there is no obstruction above the first bottom wheel 32 and the second bottom wheel 33, and the first shaft portion 51 and the second shaft portion 52 of the test piece 50 can be placed on the two sets of first bottom wheels 32 and the second bottom wheels 33, and then the flip assembly 43 is flipped to the state shown in FIG. Fig.10 The state shown in the figure is then used as Fig.16 The locking members such as the latch 70 shown lock the swing end of the top plate 433 with the second column 432. After locking, the top plate 433 is stabilized above the first bottom wheel 32 and the second bottom wheel 33 to prevent loosening.

[0034] Please refer to Fig.15 and Fig.16 In this embodiment, a pressure sensor 436 for sensing the pressure of the top wheel 42 is provided in the slider 435. When adjusting, Fig. 9 As shown, as the distance between the first bottom wheel 32 and the second bottom wheel 33 continues to decrease, the second shaft portion 52 gradually moves upward until the second shaft portion 52 contacts the top wheel 42 above it, and the pressure sensor 436 senses the pressure on the top wheel 42, and then feeds back the signal to the control system, thereby reminding the staff to adjust into place.

[0035] Please refer to Fig.11 The driving mechanism 20 of this embodiment includes a base 21, a motor 22 fixed on the base 21, and a sleeve 23 connected to the output shaft of the motor 22. The sleeve 23 is used to connect the test piece 50. Specifically, the first shaft portion 51 or the second shaft portion 52 of the test piece 50 can be connected through the sleeve 23, and the test piece 50 can be driven by the motor 22 to perform a rotational dynamic balancing test.

[0036] For further information, please refer to Fig.12 and Fig.13 In this embodiment, the second bottom wheel 33 is a double-layer wheel set with an annular interval. The first bottom wheel 32 can extend into the annular interval of the second bottom wheel 33. By setting the double-layer wheel set, it is combined with the first bottom wheel 32 to form a three-layer support structure along the x direction, thereby improving the support stability of the first shaft portion 51 and the second shaft portion 52.

[0037] The present embodiment also provides a stand 60 used as a detection mechanism, and the stand 60 is installed on both sides of the lower end of the bracket 10 along the x-direction. The stand 60 includes a support leg 61 and a detection sensing module 62. The detection sensing module 62 can be any device in the prior art that can be installed on the support leg 61 for detecting balance, which will not be described in detail below.

[0038] Please refer to Fig. 9 This embodiment also provides a dynamic balancing test method, using the above-mentioned universal dynamic balancing test machine, including the following steps: S1: placing the first shaft portion 51 and the second shaft portion 52 of the test piece 50 on the first bottom wheel 32 and the second bottom wheel 33 of the two supporting mechanisms 30 respectively; S2: Move the top wheel 42 of the pressing mechanism 40 located above the first shaft portion 51 to above the midpoint perpendicular line between the first bottom wheel 32 and the second bottom wheel 33, and adjust the position of the top wheel 42 along the midpoint perpendicular line until the top wheel 42 contacts the first shaft portion 51; S3: using a vernier caliper or other auxiliary tool to measure the radius difference d1 between the first shaft portion 51 and the second shaft portion 52; S4 adjusts the height of the top wheel 42 above the second shaft portion 52 according to the radius difference d1, that is, adjusts the center height difference d2 of the two top wheels 42 to be equal to the radius difference d1. This can be controlled by the circuit control program of the prior art. In order to simplify the control program, the two flipping components 43 can be designed to be consistent in size, installation height, initial height of the driving end of the second driving device 434, etc. When the two flipping components 43 are flipped to the position as shown in FIG. Fig.10 After the state shown, the initial height of the top wheel 42 is consistent. At this time, the lifting height of the second driving device 434 can be controlled by the circuit control program to adjust the height of the top wheel 42, thereby achieving the above adjustment; S5 adjusts the distance between the first bottom wheel 32 and the second bottom wheel 33 for supporting the second shaft portion 52. As the distance between the first bottom wheel 32 and the second bottom wheel 33 decreases, the second shaft portion 52 gradually moves upward until the second shaft portion 52 contacts the top wheel 42 above it. At this time, the axes of the first shaft portion 51 and the second shaft portion 52 are parallel to the horizontal plane, that is, Fig. 9 The line connecting the cross-sectional centers of the first shaft portion 51 and the second shaft portion 52 shown in FIG. 5 is parallel to the horizontal line; S6 connects the test piece 50 to the driving end of the driving mechanism 20, starts the driving mechanism 20, and performs a dynamic balance test on the test piece 50. Other instruments used in the specific dynamic balance test process can refer to the dynamic balance test instruments in the prior art, which will not be described in detail below.

[0039] The dynamic balancing test method of this embodiment can accurately adjust the axes of the first shaft portion 51 and the second shaft portion 52 to be parallel to the horizontal plane, and then perform subsequent dynamic balancing test data collection. The collected data will display a relatively stable waveform on the display screen, and the peak characteristics are obvious.

[0040] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A universal dynamic balancing tester, characterized in that: include: Bracket (10); A driving mechanism (20), disposed on the support (10), and used for driving the test piece (50) to rotate; Two support mechanisms (30) are sequentially arranged on one side of the driving end of the driving mechanism (20) along the x-direction, and are used to support the first shaft portion (51) and the second shaft portion (52) of the test piece (50), respectively; the support mechanism (30) comprises a support plate (31) arranged on the bracket (10), a first bottom wheel (32) and a second bottom wheel (33) arranged on the support plate (31) and capable of adjusting the spacing along the y-direction; The two pressing mechanisms (40) include a top wheel (42) that can be moved above a midpoint perpendicular line between the first bottom wheel (32) and the second bottom wheel (33) and can be raised and lowered along the midpoint perpendicular line to adjust the position.

2. A universal dynamic balancing tester according to claim 1, characterized in that: The bracket (10) is provided with a first guide rail (11) extending along the x-direction, and the driving mechanism (20) and the support plate (31) can both slide along the first guide rail (11) to adjust their positions.

3. A universal dynamic balancing tester according to claim 1, characterized in that: The support plate (31) is provided with a second guide rail (34) extending in the y direction. The support mechanism (30) further comprises a first sliding frame (35) and a second sliding frame (36). The first bottom wheel (32) is rotatably disposed on the first sliding frame (35), and the second bottom wheel (33) is rotatably disposed on the second sliding frame (36). Both the first sliding frame (35) and the second sliding frame (36) can slide along the second guide rail (34) to adjust their positions.

4. A universal dynamic balancing tester according to claim 3, characterized in that: The support mechanism (30) further comprises a synchronous adjustment component (37), the synchronous adjustment component (37) comprising a first rack (371) fixed to the first sliding frame (35), a second rack (372) fixed to the second sliding frame (36), a right-angle frame (373) fixed to the support plate (31), a gear (374) rotatably arranged on the right-angle frame (373), and a first driving device (375) for driving any one of the first rack (371) and the second rack (372) along the y direction.

5. A universal dynamic balancing tester according to claim 4, characterized in that: The first driving device (375) is a pneumatic cylinder, an electric cylinder or a screw module.

6. A universal dynamic balancing tester according to claim 1, characterized in that: The pressing mechanism (40) further comprises a flip assembly (43), the flip assembly (43) comprising a first column (431) fixed to both sides of the support plate (31) along the y direction, a second column (432), a top plate (433) rotatably arranged on the first column (431), a second driving device (434) fixed on the top plate (433), and a slider (435) connected to the output end of the second driving device (434), the top wheel (42) being rotatably arranged on the slider (435), and the swing end of the top plate (433) being lockably connected to the second column (432).

7. A universal dynamic balancing tester according to claim 6, characterized in that: A pressure sensor (436) for sensing the pressure of the top wheel (42) is provided in the slider (435).

8. A universal dynamic balancing tester according to claim 1, characterized in that: The driving mechanism (20) comprises a base (21), a motor (22) fixed on the base (21), and a shaft sleeve (23) connected to an output shaft of the motor (22), wherein the shaft sleeve (23) is used to connect the test piece (50).

9. A universal dynamic balancing tester according to claim 1, characterized in that: The second bottom wheel (33) is a double-layer wheel set with an annular spacing.

10. A dynamic balance test method, characterized in that: The universal dynamic balancing test machine as claimed in any one of claims 1 to 9 is used, comprising the following steps: S1: placing the first shaft portion (51) and the second shaft portion (52) of the test piece (50) on the first bottom wheel (32) and the second bottom wheel (33) of the two support mechanisms (30), respectively; S2: moving the top wheel (42) of the pressing mechanism (40) located above the first shaft portion (51) to above the midpoint perpendicular line between the first bottom wheel (32) and the second bottom wheel (33), and adjusting the position of the top wheel (42) by lifting and lowering along the midpoint perpendicular line until the top wheel (42) contacts the first shaft portion (51); S3: measuring a radius difference between the first shaft portion (51) and the second shaft portion (52); S4: adjusting the height of the top wheel (42) above the second shaft portion (52) according to the radius difference; S5: adjusting the distance between the first bottom wheel (32) and the second bottom wheel (33) used to support the second shaft portion (52) until the second shaft portion (52) contacts the top wheel (42) above it, and at this time, the axes of the first shaft portion (51) and the second shaft portion (52) are parallel to a horizontal plane; S6: connecting the test piece (50) to the driving end of the driving mechanism (20), starting the driving mechanism (20), and performing a dynamic balance test on the test piece (50).

Images