Device and method for testing performance of composite material-steel hybrid gear wheel disk

Abstract

The invention discloses a device and a method for testing the performance of a composite material-steel hybrid gear wheel disk. The device comprises a torsion testing machine, a composite material-steel hybrid gear test piece, a rack fixing device, a spline loading device, an electromagnetic heating device, a torque sensor, an angle sensor, a thermocouple temperature sensor, a strain gauge and a data acquisition device. According to the test method provided by the invention, the performance of the hybrid gear wheel disk is tested by adjusting the parameters of the torsion tester, the influence of heat on the hybrid gear composite material wheel disk in the gear meshing process is considered, and key performance parameters such as a torque-rotation angle curve and a strain state of the hybrid gear can be directly obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of gear transmission, and in particular to a composite material-steel hybrid gear web performance testing device and a testing method. Background Art

[0002] Composite-steel hybrid gears are a new type of lightweight gear structure, in which the ring gear and hub are made of high-strength steel to ensure tooth strength and wear resistance, and the spokes are made of composite materials to achieve weight reduction. However, the introduction of heterogeneous material connection structures not only poses the traditional risks of tooth root fracture and tooth flank pitting failure, but also poses a high risk of spoke damage and heterogeneous material connection failure. Furthermore, due to the significant differences in thermal properties such as heat conduction and thermal expansion coefficient between composites and metals, the performance of this structure exhibits a more complex degradation mechanism under thermomechanical coupling conditions.

[0003] Currently, gear performance testing, both domestically and internationally, is mostly performed within a gearbox. However, when testing gears through a gearbox, there's a high risk of the gear teeth breaking before the spokes. This not only impacts test continuity but also prevents the acquisition of complete spoke performance data, impacting the reliability and validity of the test results. Furthermore, the rotational motion of the gears during gearbox testing complicates data collection, and gearbox testing equipment is complex, resulting in high equipment investment costs and stringent maintenance requirements. Summary of the Invention

[0004] Purpose of the invention: The present invention provides a composite material-steel hybrid gear web performance testing device and testing method. The testing device is reliable and the testing method is reasonable, and key performance parameters such as the torque-loading curve and strain distribution of the hybrid gear can be obtained.

[0005] Technical solution: The present invention proposes a composite-steel hybrid gear web performance testing device, which is characterized in that it includes a torsion testing machine, a rack fixing device, a composite-steel hybrid gear test piece meshing with the rack fixing device, a spline loading device cooperating with the composite-steel hybrid gear test piece, an electromagnetic heating device installed on the circumference of the rim of the composite-steel hybrid gear test piece, a torque sensor, an angle sensor, a thermocouple temperature sensor, a strain gauge and a data acquisition device; the rack fixing device is connected to the fixed end of the torsion testing machine, and the spline loading device is connected to the loading end of the torsion testing machine; the torque sensor is installed at the fixed end of the torsion testing machine, the angle sensor is installed at the loading end of the torsion testing machine, the thermocouple temperature sensor is installed on the web, outer rim and inner hub of the composite-steel hybrid gear test piece, and the strain gauge is adhered to the web of the composite-steel hybrid gear test piece; the data acquisition device is used to collect data from each sensor and strain gauge.

[0006] Preferably, it also includes a strain gauge and a data acquisition device, wherein the strain gauge is installed on the web of the composite material-steel hybrid gear test piece, and the data acquisition device is used to collect data from each sensor and strain gauge.

[0007] Preferably, the rack fixing device includes a rack, a limiting fixture, a transition fixture and a support plate; the support plate is connected to the fixed end of the torque testing machine, and the rack is fixed to the support plate through the transition fixture; the limiting fixture is fixedly connected to the rack, and the limiting fixture is used to constrain the axial displacement of the composite material-steel hybrid gear test piece.

[0008] Preferably, a plurality of external gear teeth are machined on the outer edge of the composite-steel hybrid gear test piece, and the external gear teeth of the composite-steel hybrid gear test piece are engaged with the rack through the gear rack to achieve positioning and fixation; the interior of the composite-steel hybrid gear test piece is connected to the torsion testing machine through a spline loading device to achieve torsional loading.

[0009] Preferably, the meshing region configuration of the composite material-steel hybrid gear test piece can be divided into a single-region meshing structure, a dual-region meshing structure or a multi-region meshing structure according to actual working conditions.

[0010] Preferably, by increasing the gear tooth module of the composite-steel hybrid gear test piece, the rack module of the rack fixing device, and the number of spline teeth of the spline loading device, it is ensured that the gear teeth, rack, and splines will not be damaged before the composite-steel hybrid gear test piece during the test.

[0011] A composite material-steel hybrid gear web performance testing method comprises the following steps:

[0012] S1: The output power of the electromagnetic heating device is set based on the hybrid gear service conditions. Based on the feedback data from the thermocouple temperature sensor, the output power of the electromagnetic heating device is dynamically adjusted during the test process to ensure that the temperature at the connection between the spoke and the metal is consistent with the service conditions.

[0013] S2: Conduct a static loading test on the composite-steel hybrid gear specimen, loading it to the maximum torsional load and then unloading it, while simultaneously collecting torque, rotation angle, and spoke strain data;

[0014] S3: Fatigue loading tests are performed on the composite-steel hybrid gear specimen in three stages at a ratio of 30%, 40%, and 30%. First, fatigue loading is performed for 30% of the total fatigue cycles, and a static test as in S2 is performed immediately after completion. Then, fatigue loading is performed for 40% of the total fatigue cycles, and a static test as in S2 is performed immediately after completion. Finally, fatigue loading is performed for 30% of the total fatigue cycles, and a static test as in S2 is performed immediately after completion. During the loading process, torque, rotation angle, temperature, and web strain data are recorded in real time.

[0015] S4: Ultrasonic testing technology is used to perform non-destructive testing on the composite-steel hybrid gear test piece after the test to evaluate the structural integrity.

[0016] Preferably, during the test process of steps S2 and S4, if the torque, angle and strain data at each stage show abnormal mutations or abnormal noise occurs during the operation of the equipment, the equipment should be stopped immediately to check whether it is an equipment failure; if the torque, angle and strain data at each stage are continuous and smooth without mutations, the equipment runs smoothly without abnormal noise, and no defects are found in the non-destructive testing in S6, it means that the performance of the web is qualified.

[0017] Preferably, the mixed gear service condition in S1 includes a normal lubrication condition and an oil-starved dry running condition.

[0018] Beneficial Effects: 1) This invention innovatively employs a gearbox-free testing solution, using external fixation and internal loading to ensure a clear load transfer path and convert torsional loads into meshing loads closer to actual operating conditions. Furthermore, by appropriately increasing the tooth module of the hybrid gear test piece, the rack module of the rack fixing device, and the number of spline teeth of the spline loading device, the load-bearing capacity of the teeth, rack, and splines can be effectively improved, thereby ensuring that the teeth, rack, and splines will not be damaged before the spoke during testing, thus ensuring the reliability of the spoke performance test.

[0019] 2) This invention can simultaneously consider the thermal effects of hybrid gear meshing during static and fatigue testing, obtaining key performance parameters such as torque-angle curves and web strain, enabling the evaluation of hybrid gear web mechanical properties under thermal-mechanical coupling. This invention incorporates thermal effects into the testing system, establishes a relatively comprehensive boundary condition setting method, and enables multi-parameter collaborative testing and analysis.

[0020] 3) The present invention is applicable to the performance testing of hybrid gear spokes under various working conditions, including different meshing states such as single-zone meshing, double-zone meshing, or multi-zone meshing, and different lubrication conditions such as normal lubrication and oil-starved dry running.

[0021] 4) The present invention has significant economy and practicality. The test can be completed without machining all the gear teeth. The test device has a simple structure and good repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the hybrid gear web performance test device and test machine in this embodiment;

[0023] Figure 2 This is a diagram of the hybrid gear web performance test device in this embodiment;

[0024] Figure 3 This is a diagram of the hybrid gear fixing and loading device in this embodiment;

[0025] Figure 4 Schematic diagram of the installation position of the thermocouple temperature sensor of the hybrid gear in this embodiment;

[0026] Figure 5 Schematic diagram of the installation position of the strain gauge in this embodiment;

[0027] Figure 6 Schematic diagram of the dual-zone meshing structure of the hybrid gear in this embodiment;

[0028] Figure 7 Schematic diagram of the multi-region meshing structure of the hybrid gear in this embodiment;

[0029] Figure 8 This is the loading curve of this embodiment under single-zone meshing conditions. DETAILED DESCRIPTION

[0030] Combine Figure 1-Figure 7 As shown, this embodiment provides a composite-steel hybrid gear web performance testing device, which primarily includes a torsion testing machine 1, a composite-steel hybrid gear test specimen 2, a rack fixture 3, a spline loading device 4, an electromagnetic heating device 5, a torque sensor 6, an angle sensor 7, a thermocouple temperature sensor 8, a strain gauge 9, and a data acquisition device 10. The rack fixture 3 includes a rack 3-1, a position limiting fixture 3-2, a transition fixture 3-3, and a support plate 3-4. The rack fixture 3 is connected to the fixed end of the torsion testing machine 1; the spline loading device 4 engages with the internal spline hole of the hybrid gear test specimen 2 and is connected to the loading end of the torsion testing machine 1. The torque sensor 6 is mounted on the fixed end of the torsion testing machine 1, the angle sensor 7 is mounted on the loading end of the testing machine 1, and the thermocouple temperature sensor 8 is mounted on the hybrid gear web, the outer rim of the web, and the inner hub. Strain gauges 9 are affixed to the web of the composite-steel hybrid gear test specimen 2. The data acquisition device 10 is used to collect data from each sensor and the strain gauge 9.

[0031] See Figure 2, is a diagram of the hybrid gear spoke performance test device in this embodiment. The limit fixture 3-2 in the test device is used to constrain the axial displacement of the hybrid gear test piece 2, and the transition fixture 3-3 realizes the connection between the rack 3-1 and the support plate 3-4. The support plate 3-4 is connected to the fixed end of the torsion testing machine 1.

[0032] See Figure 3 、 Figure 6 、 Figure 7 , according to the meshing characteristics of the actual working conditions, the external gear teeth of the hybrid gear test piece are selectively processed to simulate different meshing conditions, including single-area meshing structure (see Figure 3 ), dual-region meshing structure (see Figure 6 ) or multi-region meshing structure (see Figure 7 ). Figure 3 This is a diagram of the hybrid gear fixing and loading device in one area of ​​this embodiment. The hybrid gear test piece 2 adopts an external fixing and internal loading method. The external gear teeth of the hybrid gear test piece 2 are positioned and fixed by meshing with the rack and pinion fixing device 3; the internal gear teeth are splined and connected to the torsion tester 1 through the spline loading device 4 to achieve torsion loading. The loading method can convert the torsional load applied by the torsion tester 1 into a tangential load and radial load at the meshing point of the gear and rack. The torsional load has the following calculation relationship with the tangential load and radial load:

[0033] F t =T / r (1)

[0034] F r =F t tanα (2)

[0035] Where, T is the input torque, N·m; F t is the tangential load, N; r is the gear pitch circle radius, m; F r is the radial load, N; α is the gear pressure angle, rad.

[0036] This test device can also effectively improve the load-bearing capacity of the teeth, rack, and splines by appropriately increasing the gear module of the hybrid gear test piece, the rack module of the rack fixing device, and the number of spline teeth of the spline loading device, thereby ensuring that the teeth, rack, and splines will not be damaged before the spoke during the test, thereby ensuring the reliability of the spoke performance test.

[0037] This embodiment also provides a method for testing the performance of a composite material-steel hybrid gear web. Using the above-mentioned test apparatus, static testing and fatigue testing of a hybrid gear test piece 2 can be carried out by adjusting the parameters of a torsion testing machine 1 according to actual working conditions, including the following steps:

[0038] S1: The output power of the electromagnetic heating device 5 is set based on the mixed gear service conditions (including normal lubrication / oil-starved dry running), and the output power of the electromagnetic heating device 5 is dynamically adjusted during the test according to the feedback data of the thermocouple temperature sensor 8 so that the temperature at the connection part between the web and the metal is consistent with the service conditions;

[0039] S2: Perform a static loading test on the composite-steel hybrid gear specimen 2, loading it to the maximum torsional load and then unloading it, while simultaneously collecting torque, rotation angle, and spoke strain data;

[0040] S3: Fatigue loading tests are performed on the composite-steel hybrid gear specimen 2 in three stages at a ratio of 30%, 40%, and 30%. First, fatigue loading is performed for 30% of the total fatigue cycles, and a static test as in S2 is immediately performed after completion. Then, fatigue loading is performed for 40% of the total fatigue cycles, and a static test as in S2 is immediately performed after completion. Finally, fatigue loading is performed for 30% of the total fatigue cycles, and a static test as in S2 is immediately performed after completion. During the loading process, torque, rotation angle, temperature, and web strain data are recorded in real time.

[0041] S4: After the test, ultrasonic testing technology is used to perform non-destructive testing on the composite-steel hybrid gear specimen 2 to evaluate the structural integrity.

[0042] See Figure 3 , is a diagram of the hybrid gear fixing and loading device in this embodiment. An electromagnetic heating device 5 is installed at the outer rim position of the hybrid gear test piece. In S1, the heat loss of the gear under different working conditions such as normal lubrication or oil-starved dry running is calculated, and the initial output power parameters of the electromagnetic heating device 5 are adjusted based on the calculation results. The power parameters of the electromagnetic loading device 5 are also adjusted in real time to meet the thermal boundary conditions of the hybrid gear in actual operation.

[0043] The heat generated by hybrid gears during operation is primarily due to tooth meshing, including power losses from relative sliding, relative rolling, oil stirring during high-speed rotation, and windage. This example uses the Anderson and Loewenthal method, as follows:

[0044] The formula for calculating the input shaft torque is:

[0045] T=9549P / n (3)

[0046] Where P is the transmission power, kW; n is the input shaft speed, r / min; T is the input shaft torque, N·m.

[0047] The formula for the average normal load on the tooth surface is:

[0048] F n =T1 / (r1cosαcosβ b ) (4)

[0049] Where r1 is the pitch radius of the gear, subscript 1 indicates the driving gear, m; β b is the base circle helix angle of the gear, rad.

[0050] The calculation formulas for the gear tooth surface sliding velocity and rolling velocity are:

[0051] V s =0.026118n1g s (z1+z2) / z2 (5)

[0052] V r =0.2094[r1sinα-0.125g s (z1+z2) / z2] (6)

[0053] Where g s is the meshing line length of the gear, m; z1 and z2 are the number of teeth of the driving and driven gears respectively.

[0054] The calculation formula for the average sliding power loss and rolling power loss of the gear tooth surface is:

[0055] q s =fF n V s / 1000 (7)

[0056] q r =9000bV r hε / cosβ b (8)

[0057] Where f is the friction coefficient; h is the average oil film thickness on the tooth surface, m; and ε is the degree of overlap.

[0058] The calculation formula for gear windage loss power is:

[0059]

[0060] Where q w1 ,q w2 are the windage loss power of the driving and driven gears respectively; μ0 is the dynamic viscosity of the lubricating oil.

[0061] When the gear speed is low, the windage loss can be ignored when calculating the gear power loss. When the gear speed is high, the windage loss accounts for a large proportion of the total gear power loss and cannot be ignored.

[0062] The gear oil stirring power loss includes the oil stirring power loss between the outer diameter of the rotating shaft and the lubricating oil, the oil stirring power loss between the disk surface and the lubricating oil, and the oil stirring power loss between the gear teeth and the lubricating oil. The calculation formulas are:

[0063] q G1 =7.37×f g νn 3 D 4.7 L×10 -26 / A g (11)

[0064] q G2 =1.47×f g νn 3 D 5.7 ×10 -26 / A g (12)

[0065]

[0066] Where, f g is the gear wetting factor, which is a value between 0 and 1, corresponding to the proportion of the gear immersed in the oil, and full immersion is 1; ν is the dynamic viscosity of the lubricating oil; R f is the tooth surface roughness factor, R f =7.93-4.648cosβ / m n ; L is the length of the component, m; B is the tooth width, m; D is the outer diameter of the gear, m; A g is the oil stirring ratio constant, generally taken as 0.2.

[0067] Therefore, the total power loss of the gear is:

[0068] q=q s +q r +q w1 +q w2 +q G1 +q G2 +q G3 (14)

[0069] In the formula, the total power loss q is the meshing power loss of the gear pair, that is, the heat source generated during the meshing process of the gear pair.

[0070] The power loss of the gear during meshing under lubrication conditions can be obtained by using formulas (3) to (14). The power loss of the gear during dry running under oil-starved conditions is different from the above calculation process in the following ways:

[0071] (1) Average rolling power loss on the gear tooth surface: Equation (8) contains the average oil film thickness h on the tooth surface. During dry running with insufficient oil, there is no oil film thickness, but relative rolling still occurs in the gear meshing. However, the calculation results show that the rolling power loss is much smaller than the sliding power loss in magnitude, so the rolling power loss can be ignored.

[0072] (2) Gear windage loss: In equations (9) and (10), there is a dynamic viscosity μ0 of the lubricating oil. During the dry operation with insufficient oil, there are no parameters related to the lubricating oil. Therefore, μ0 = 0, and equations (9) and (10) are changed to:

[0073]

[0074] (3) There is no oil churning loss during the dry operation.

[0075] By adjusting the parameters of the torsion testing machine 1, the gear can be subjected to static and fatigue tests. The qualified hybrid gear test piece 2 and other devices are properly installed on the torsion testing machine 1 to ensure that the tangential and radial loads meet the requirements when the teeth of the hybrid gear test piece 2 are engaged with the rack 3-1. At the same time, after the hybrid gear test piece 2 is installed, a certain amount of torsional preload is applied to the hybrid gear test piece 2 using the spline loading device 4 to eliminate the influence of the assembly clearance between the hybrid gear test piece 2 and the rack fixing device 3 and the spline loading device 4 on the test results. Subsequently, the hybrid gear spoke performance test is carried out according to steps S2 and S3, wherein the static test adopts a step-by-step loading method and continuously loads to the rated torsional load; the fatigue load amplitude, loading times and loading frequency need to be set in the fatigue cycle loading stage.

[0076] See Figure 1 、 Figure 4 and Figure 5 , marking the installation locations of the torque sensor 6, angle sensor 7, thermocouple temperature sensor 8, and strain gauge 9 in this embodiment. During the pre-test preparation phase, the aforementioned test equipment requires a comprehensive inspection and calibration to ensure that the measurement range meets the requirements, the data acquisition system is operating normally, and the connecting lines are intact. Furthermore, the installation location of each sensor is determined and marked according to actual needs, and surface treatment and cleaning are performed to ensure that the installation process meets process requirements. During the test phase, the data output of each sensor must be continuously monitored to observe abnormal fluctuations, and the temperature and humidity of the test environment must be kept stable to avoid electromagnetic interference and mechanical vibration. After the test, the equipment must be fully inspected to assess sensor status, organize and verify test data, and perform equipment cleaning and maintenance.

[0077] See Figure 8The data acquisition device 10 collects relevant data, obtaining torque and angle data from the static and fatigue tests of the hybrid gear test piece 2 and strain data from the strain gauge 9 through the torque sensor 6 and angle sensor 7. After data processing, the test loading curve is obtained. Under the specified load conditions, the loading curve exhibits uniform, continuous, and approximately linear characteristics, without obvious divergence or discontinuity. No abnormal sound is heard during the test. Ultrasonic testing technology is further used to assist in non-destructive testing of the spokes of the hybrid gear test piece 2 to assess the performance of the spokes. During the test, if the torque, angle, and strain data at each stage show abnormal sudden changes or abnormal noise is heard during equipment operation, the equipment should be immediately shut down to check for equipment failure. If the rate of change of the torque, angle, and strain data at each stage is less than 3%, the sound pressure of the equipment operation does not exceed 85dB(A), and the non-destructive testing defect area is less than 0.1% of the total spoke area, the spoke performance is considered acceptable.

[0078] This testing method utilizes a systematic experimental design and, through the rational configuration of test equipment such as torque sensors, angle sensors, and temperature sensors, enables the performance evaluation of hybrid gear spokes under thermal-mechanical coupling. Through the comprehensive collection and analysis of multi-source data, a series of key performance parameters, including loading curves and spoke strain, are obtained. This method, characterized by advanced testing techniques, comprehensive data acquisition, and scientific analysis, accurately reflects the operating state and performance characteristics of hybrid gears under actual operating conditions, providing an important experimental basis for hybrid gear performance evaluation.

Claims

1. A composite material-steel hybrid gear web performance testing device, characterized in that: The invention comprises a torsion tester (1), a rack fixing device (3), a composite material-steel hybrid gear test piece (2) meshed with the rack fixing device (3), a spline loading device (4) matched with the composite material-steel hybrid gear test piece (2), an electromagnetic heating device (5) installed in the circumference of the rim of the composite material-steel hybrid gear test piece (2), a torque sensor (6), an angle sensor (7) and a thermocouple temperature sensor (8); the rack fixing device (3) is connected to the fixed end of the torsion tester (1), and the spline loading device (4) is connected to the loading end of the torsion tester (1); the torque sensor (6) is installed at the fixed end of the torsion tester (1), the angle sensor (7) is installed at the loading end of the torsion tester (1), and the thermocouple temperature sensor (8) is installed at the web, the outer rim and the inner hub of the composite material-steel hybrid gear test piece (2).

2. The composite material-steel hybrid gear web performance testing device according to claim 1, characterized in that: It also includes a strain gauge (9) and a data acquisition device (10), wherein the strain gauge (9) is mounted on the web of the composite material-steel hybrid gear test piece (2), and the data acquisition device (10) is used to collect data from each sensor and the strain gauge (9).

3. The composite material-steel hybrid gear web performance testing device according to claim 1, characterized in that: The rack fixing device (3) comprises a rack (3-1), a limiting tool (3-2), a transition tool (3-3) and a supporting plate (3-4); the supporting plate (3-4) is connected to the fixed end of the torque tester (1), and the rack (3-1) is fixed to the supporting plate (3-4) via the transition tool (3-3); the limiting tool (3-2) is fixedly connected to the rack (3-1), and the limiting tool (3-2) is used to constrain the axial displacement of the composite material-steel hybrid gear test piece (2).

4. The composite material-steel hybrid gear web performance testing device according to claim 3, characterized in that: A plurality of external gear teeth are machined on the outer edge of the composite material-steel hybrid gear test piece (2), and the external gear teeth of the composite material-steel hybrid gear test piece (2) are engaged with the rack (3-1) to achieve positioning and fixation; the interior of the composite material-steel hybrid gear test piece (2) is connected to the torsion testing machine via a spline loading device (4) to achieve torsional loading.

5. The composite material-steel hybrid gear web performance testing device according to claim 1, characterized in that: The meshing region configuration of the composite material-steel hybrid gear test piece (2) can be divided into a single-region meshing structure, a double-region meshing structure or a multi-region meshing structure according to the hybrid gear service conditions.

6. The composite material-steel hybrid gear web performance testing device according to claim 5, characterized in that: By increasing the gear tooth module of the composite-steel hybrid gear test piece (2), the rack module of the rack fixing device, and the number of spline teeth of the spline loading device (4), it is ensured that the gear teeth, rack, and splines will not be damaged before the composite-steel hybrid gear test piece (2) during the test.

7. A composite material-steel hybrid gear web performance testing method according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: setting the output power of the electromagnetic heating device (5) based on the service condition of the hybrid gear, and dynamically adjusting the output power of the electromagnetic heating device (5) during the test according to the feedback data of the thermocouple temperature sensor (8) so that the temperature at the connection part between the web and the metal is consistent with the service condition; S2: Conduct a static loading test on the composite-steel hybrid gear specimen (2), load it to the maximum torsional load and then unload it, and simultaneously collect torque, rotation angle and spoke strain data; S3: Fatigue loading test of composite material-steel hybrid gear test piece (2) is performed in three stages at a ratio of 30%, 40%, and 30%: first, fatigue loading of 30% of the total fatigue cycles is performed, and after completion, a static test as in S2 is immediately performed; Then, fatigue loading of 40% of the total fatigue cycles is performed, and a static test similar to S2 is immediately performed after completion. Finally, fatigue loading of 30% of the total fatigue cycles is performed, and a static test similar to S2 is immediately performed after completion. During the loading process, torque, rotation angle, temperature, and web strain data are recorded in real time. S4: Ultrasonic testing technology is used to perform non-destructive testing on the composite-steel hybrid gear test piece (2) after the test to evaluate the structural integrity.

8. The composite material-steel hybrid gear web performance testing method according to claim 6, characterized in that: During the test process of steps S2 and S4, if the torque, angle and strain data at each stage show abnormal mutations or abnormal noise occurs during the operation of the equipment, the equipment should be stopped immediately to check whether it is an equipment failure; if the torque, angle and strain data at each stage are continuous and smooth without mutations, the equipment runs smoothly without abnormal noise, and no defects are found in the non-destructive testing in S4, it means that the performance of the web is qualified.

9. The composite material-steel hybrid gear web performance testing method according to claim 6, characterized in that: The mixed gear service conditions in S1 include normal lubrication conditions and oil-starved dry running conditions.

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