Gear dynamic stress testing method under high-temperature and high-rotating-speed conditions

Abstract

The invention provides a gear dynamic stress testing method under high-temperature and high-rotating-speed conditions, relates to the field of gear testing, and aims to solve the problem that a current dynamic stress testing mode is difficult to adapt to a high-temperature and high-rotating-speed environment of an aviation gear, and adopts a short-range induction power supply technology to realize energy flow transmission from a fixed telemetering device stator to a rotating telemetering device rotor. An information transmission stream from the rotating part to the fixed part is constructed through wireless data transmission, and the temperature resistance upper limit of the test system is improved; and the local temperature of the rotor of the remote measurement device is controlled through oil injection cooling, so that the environmental adaptability of the test system is ensured, and the requirement of dynamic stress test of the aviation gear under high-temperature and high-rotating-speed conditions is met.

Description

Technical Field

[0001] The present invention relates to the field of gear testing, and particularly to a method for testing the dynamic stress of gears under high temperature and high rotational speed conditions. Background Art

[0002] During the design and research and development of aviation gears, the dynamic stress testing of the system can effectively avoid potential resonance risks. However, the operating speed of aviation gears is extremely high, and high-speed rotation will cause the gearbox to generate a relatively high temperature, making it difficult to conduct dynamic stress testing. In terms of the temperature resistance performance of the testing device, the conventional testing device is restricted by internal electronic components and can only withstand a maximum temperature of 85°C. For some special devices, the upper temperature limit can only be relaxed to 125°C. However, under actual high-speed rotation conditions, the high-speed tooth surface temperature can reach 240°C, and the lubricating oil used is also required to have a temperature resistance capacity of 175°C. Therefore, when conducting dynamic stress testing on high-speed aviation gears, not only the problems of energy flow and information flow transmission in conventional testing need to be solved, but also it is necessary to ensure that the testing device can operate normally in such a high-temperature environment.

[0003] Currently, the conventional dynamic stress testing method is to install a testing device based on wireless transmission methods such as WIFI on the rotating gear, and usually use a lithium battery with a high energy density for power supply. However, this method has obvious drawbacks in a high-temperature and high-rotational-speed environment: Firstly, the battery life of the lithium battery is limited and it is difficult to meet the requirements of long-term and multiple tests. If the battery capacity is increased, the additional mass will affect the test results; Secondly, the environmental adaptability of the lithium battery is poor, and there is a risk of electrolyte imbalance inside it during high-speed rotation of the gear. In addition, considering the temperature resistance conditions, the operating temperature range of conventional lithium batteries is between -20°C and 60°C, and the maximum temperature that conventional WIFI communication devices can withstand is only 85°C, which limits their application in gear dynamic stress testing. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies existing in the prior art, and provide a method for testing the dynamic stress of gears under high temperature and high rotational speed conditions. The method uses near-field inductive power supply technology to achieve the transfer of energy flow from the stator of the fixed telemetry device to the rotor of the rotating telemetry device, and constructs an information transmission flow from the rotating part to the fixed part through wireless data transmission, raising the upper temperature limit of the testing system to 125 degrees Celsius; and controls the local temperature of the rotor of the telemetry device through oil injection cooling to ensure the environmental adaptability of the testing system and meet the requirements of dynamic stress testing of aviation gears under high temperature and high rotational speed conditions.

[0005] To solve the above problems, the following solutions are adopted:

[0006] A method for testing the dynamic stress of gears under high temperature and high rotational speed conditions, comprising:

[0007] The rotor of the telemetry device is installed on the gear under test, and the stator of the telemetry device wirelessly powers the rotor of the telemetry device;

[0008] The rotor of the telemetry device acquires the strain information, temperature information, and rotational speed information of the gear under test during high-speed rotation, as well as the internal temperature information of the rotor of the telemetry device, and wirelessly transmits the data to the data transmission controller for data analysis by the upper computer;

[0009] Based on the acquired internal temperature information, the rotor of the telemetry device is cooled by spraying oil to control the temperature of the rotor of the telemetry device within the set range.

[0010] Furthermore, a groove is machined axially along the shaft barrel of the gear under test to accommodate and install the rotor of the telemetry device.

[0011] Furthermore, the telemetry device fits circumferentially to the groove and is fixed, and an elastic retaining ring is fitted to the end face of the shaft barrel of the gear under test to restrict the axial position of the rotor of the telemetry device.

[0012] Furthermore, the rotor of the telemetry device and the stator of the telemetry device are spaced apart axially along the shaft of the gear under test. The stator of the telemetry device is provided with an inductive power supply coil, and the rotor of the telemetry device is internally provided with an inductive power receiving module. The inductive power supply coil wirelessly powers the inductive power receiving module.

[0013] Furthermore, the data transmission controller is connected to the stator of the telemetry device and powers the stator of the telemetry device.

[0014] Furthermore, the stator of the telemetry device is installed on the end cover. An oil pipe is installed on the end cover. One end of the oil pipe passes through the rotor of the telemetry device. The oil injection port provided on the oil pipe faces the side of the rotor of the telemetry device close to the gear under test, and the cooling oil in the oil pipe is sprayed onto the rotor of the telemetry device.

[0015] Furthermore, the oil pipe is connected to a cooling circulation device. The cooling circulation device includes a cooler, an oil cylinder, an oil pump, a flow meter, and a cooling controller. The cooling controller is connected to the upper computer. The cooler, the oil cylinder, the oil pump, the flow meter, and the oil pipe are connected in sequence. The cooling controller controls the operating parameters of the cooler and the oil pump, and the flow meter collects the flow information and sends it to the cooling controller.

[0016] Furthermore, the cooling controller receives the internal temperature information of the rotor of the telemetry device, adjusts the operating states of the cooler and the oil pump according to the set control logic, cools the rotor of the telemetry device, and keeps the temperature of the rotor of the telemetry device within the set range.

[0017] Furthermore, the rotor of the telemetry device transmits the acquired information data to the stator of the telemetry device by radio frequency encoding and modulating the signal. The stator of the telemetry device has a radio frequency receiving antenna for receiving the radio frequency encoded and modulated signal and is connected to the data transmission controller through an antenna feeder to transmit the radio frequency encoded and modulated signal to the data transmission controller.

[0018] Furthermore, the host computer installs data acquisition and analysis software, which receives, stores, and can display the information data collected by the rotor of the telemetry device parsed and sent by the data transmission controller in the form of waveforms.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0020] Aiming at the problem that the current dynamic stress test method is difficult to adapt to the high-temperature and high-speed environment of aviation gears, the near-field inductive power supply technology is adopted to realize the energy flow transfer from the fixed stator of the telemetry device to the rotating rotor of the telemetry device, and an information transmission flow from the rotating part to the fixed part is constructed through wireless data transmission, raising the upper temperature limit of the test system to 125 degrees Celsius; and the local temperature of the rotor of the telemetry device is controlled by oil injection cooling to ensure the environmental adaptability of the test system and meet the requirements of dynamic stress testing of aviation gears under high-temperature and high-speed conditions.

[0021] The inductive power supply coil of the stator of the telemetry device wirelessly powers the inductive power receiving module of the rotor, and together with the data transmission controller, powers the stator of the telemetry device, forming a stable power supply link. The wireless power supply method not only avoids problems such as winding and wear of traditional power supply lines in a high-speed rotating environment, but also can avoid overheating damage caused by the high-speed operation of conductive slip rings, improving the power supply efficiency and ensuring the continuous and stable operation of the test device under high-temperature and high-speed conditions.

[0022] The oil pipe installed on the end cover has an oil injection port facing the rotor of the telemetry device, spraying cooling oil onto the rotor. The oil pipe is connected to a cooling circulation device, and the cooling controller adjusts the operating states of the cooler and the oil pump according to the temperature information inside the rotor. In this way, the temperature of the rotor of the telemetry device can be accurately controlled to keep it within the set range, effectively reducing the impact of high temperature on the internal electronic components of the test device, extending the service life of the device, and ensuring the stability and accuracy of test data.

[0023] The rotor of the telemetry device sends the collected data to the stator of the telemetry device through radio frequency coded modulation signals, and then transmits it to the data transmission controller through the antenna feeder. Finally, it is received, stored, and displayed in the form of waveforms by the data acquisition and analysis software installed on the host computer. A complete set of data transmission and analysis systems ensures the stable transmission of data in a high-temperature and high-speed environment, facilitating technicians to directly observe and deeply analyze test data, and providing a basis for evaluating the dynamic stress of gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The schematic diagrams forming a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0025] Figure 1Schematic diagram of the telemetry device in Embodiment 1 of the present invention.

[0026] Figure 2 Schematic diagram of the component modules of the host computer and the telemetry device in Embodiment 1 of the present invention.

[0027] Figure 3 Schematic flowchart of the gear dynamic stress test method under high temperature and high rotational speed conditions in Embodiment 1 of the present invention.

[0028] In the figure, 1 is the end cover; 2 is the gearbox; 3 is the stator of the telemetry device; 4 is the snap ring; 5 is the rotor of the telemetry device; 6 is the gear under test. Detailed implementation manners

[0029] Embodiment 1

[0030] In a typical embodiment of the present invention, as Figures 1 - 3 shown, a gear dynamic stress test method under high temperature and high rotational speed conditions is provided.

[0031] The design and research and development of aviation gears require systematic dynamic stress testing to avoid resonance risks. However, during actual testing, the high operating speed of aviation gears will cause the temperature of the gearbox 2 to rise significantly. The temperature of the high-speed tooth surface can reach 240°C, and the temperature resistance requirement for the lubricating oil is 175°C. In addition, conventional testing devices are restricted by internal electronic components and have a low upper temperature limit, making it difficult to meet the stress testing requirements for high-temperature and high-rotational-speed aviation gears. Based on this, this embodiment provides a gear dynamic stress test method under high temperature and high rotational speed conditions. By adopting the near-field inductive power supply technology, the energy flow transmission from the fixed stator 3 of the telemetry device to the rotating rotor 5 of the telemetry device is realized. An information transmission flow from the rotating part to the fixed part is constructed through wireless data transmission, and the local temperature of the rotor 5 of the telemetry device is controlled by oil injection cooling to ensure the environmental adaptability of the test system and meet the requirements for dynamic stress testing of aviation gears under high temperature and high rotational speed conditions.

[0032] As Figure 3 shown, a gear dynamic stress test method under high temperature and high rotational speed conditions includes:

[0033] The rotor 5 of the telemetry device is installed on the gear 6 under test, and the stator 3 of the telemetry device supplies wireless power to the rotor 5 of the telemetry device;

[0034] The rotor 5 of the telemetry device acquires the strain information, temperature information, and rotational speed information of the gear 6 under test during high-speed rotation, as well as the internal temperature information of the rotor 5 of the telemetry device, and sends it wirelessly to the data transmission controller for data analysis by the host computer;

[0035] According to the acquired internal temperature information, the rotor 5 of the telemetry device is cooled by oil injection to control the temperature of the rotor 5 of the telemetry device within the set range.

[0036] By designing the stator 3 of the telemetry device and the rotor 5 of the telemetry device, the induction power supply coil on the stator 3 of the telemetry device cooperates with the induction power receiving module inside the rotor 5 of the telemetry device to achieve the transfer of energy flow from the fixed stator 3 of the telemetry device to the rotating rotor 5 of the telemetry device. The wireless power supply method gets rid of the bondage of traditional lithium battery power supply, avoids problems such as short battery life in high-temperature and high-rotation-speed environments and increased mass affecting test results, and ensures that the test device can continuously and stably obtain electrical energy under complex working conditions.

[0037] Construct the information transmission flow from the rotating part (the rotor 5 of the telemetry device) to the fixed part (the stator 3 of the telemetry device, the data transmission controller and the upper computer). The rotor 5 of the telemetry device transmits the strain information, temperature information, rotation speed information of the test gear 6 under high-speed rotation and its own internal temperature information collected through radio frequency coded modulation signals to the stator 3 of the telemetry device, and then transmits it to the data transmission controller through the antenna feeder, and finally the upper computer conducts data analysis. This wireless data transmission method is not overly interfered by high-speed rotation and high-temperature environments, ensuring the accurate and timely transmission of data.

[0038] Adopt an oil injection cooling structure to control the local temperature of the rotor 5 of the telemetry device. Install an oil pipe on the end cover 1. One end of the oil pipe passes through the rotor 5 of the telemetry device, and the oil injection port on the oil pipe faces the side of the rotor 5 of the telemetry device close to the test gear 6, spraying the cooling oil onto the rotor 5 of the telemetry device. The oil pipe is connected to a cooling circulation device composed of a cooler, an oil cylinder, an oil pump, a flow meter and a cooling controller. The cooling controller adjusts the operating states of the cooler and the oil pump according to the obtained internal temperature information of the rotor 5 of the telemetry device according to the set control logic to achieve precise temperature reduction of the rotor 5 of the telemetry device and keep the temperature of the rotor 5 of the telemetry device within the set range.

[0039] By adopting comprehensive measures such as using high-temperature-resistant materials, optimizing circuit design and combining the oil injection cooling of the cooling circulation device, the temperature resistance upper limit of the test system is increased to 125 degrees Celsius. Compared with conventional test devices, it can better adapt to high-temperature and high-rotation-speed environments, reduce the influence of high temperature on the performance of internal electronic components of the test device, and ensure the stable operation of the test device.

[0040] Specifically, as Figure 1 shown, the gear dynamic stress test method under high-temperature and high-rotation-speed conditions is mainly implemented by two parts: the telemetry system and the cooling circulation device. Among them, the telemetry system includes three major parts: the upper computer, the digital transmission controller and the telemetry device, and the telemetry device is composed of the stator 3 of the telemetry device and the rotor 5 of the telemetry device. The rotor 5 of the telemetry device is installed inside the test gear 6 and can rotate with the gear. The stator 3 of the telemetry device is installed on the end cover 1, and the end cover 1 is fixed on the housing of the gearbox 2. The distance between the rotor 5 of the telemetry device and the stator 3 of the telemetry device is 5 mm to 10 mm.

[0041] AsFigure 2 As shown, the rotor 5 of the telemetry device is equipped with 12 strain sampling channels, 3 temperature sampling channels, 2 rotational speed sampling channels, and has an internal temperature sampling channel. The rotor 5 of the telemetry device sends the sampled data to the stator 3 of the telemetry device through a radio frequency encoded modulation signal. The stator 3 of the telemetry device has a radio frequency receiving antenna for the radio frequency encoded modulation signal and is connected to the data transmission controller through an antenna feeder, so as to transmit the radio frequency encoded modulation signal to the data transmission controller. The data transmission controller decodes the radio frequency encoded modulation signal into a digital signal and performs protocol conversion and sends it to the upper computer.

[0042] The upper computer installs data acquisition and analysis software, receives, stores, and can display the data of each channel collected by the rotor 5 of the telemetry device parsed and sent by the data transmission controller in the form of waveforms, which is convenient for technicians to visually observe and analyze the data. Through the waveform display, technicians can clearly see the strain change trend of the gear at different rotational speeds, so as to judge whether the working state of the gear is normal.

[0043] The data transmission controller is also connected to the stator 3 of the telemetry device by a power supply cable. The rotor 5 of the telemetry device and the stator 3 of the telemetry device are spaced apart axially along the axis of the test gear 6. The data transmission controller converts 220V alternating current into 24V high-frequency alternating current through the power conditioning module inside it, and drives the induction power supply coil inside the stator 3 of the telemetry device to wirelessly power the induction power receiving module inside the rotor 5 of the telemetry device. Among them, the spaced distribution of the rotor 5 of the telemetry device and the stator 3 of the telemetry device avoids the collision between the two during the high-speed rotation process, ensuring the safety and reliability of the device; in addition, a reasonable spacing helps to optimize the electromagnetic coupling effect between the induction power supply coil and the induction power receiving module, improve the efficiency of wireless power supply, and ensure that the rotor 5 of the telemetry device can stably obtain sufficient electrical energy.

[0044] It should be noted that compared with the traditional wired power supply method, this short-range inductive power supply of wireless power supply avoids the risk of failures caused by cable entanglement in a high-speed rotation environment, improving the reliability and safety of the system. At the same time, the inductive power supply is not affected by high-speed rotation and complex electromagnetic environments and can continuously and stably supply electrical energy to the rotor 5 of the telemetry device. The data transmission controller is connected to the stator 3 of the telemetry device and powers it, further ensuring the stability of the entire power supply system.

[0045] The data transmission controller can perform processing such as filtering and voltage stabilization on the input power supply to ensure a stable voltage and current are provided to the stator 3 of the telemetry device, thereby indirectly ensuring the power supply stability of the rotor 5 of the telemetry device.

[0046] Such as Figure 1As shown, the rotor 5 of the telemetry device has a boss, and a corresponding groove is machined axially inside the shaft cylinder of the gear under test 6 to achieve mating installation with the rotor 5 of the telemetry device, thereby realizing the circumferential fixation of the rotor 5 of the telemetry device. At the same time, a groove is machined circumferentially on the end face of the shaft cylinder of the gear under test 6, and a snap ring 4 is installed to realize the axial fixation of the rotor 5 of the telemetry device. The snap ring 4 does not affect the wireless power supply between the rotor 5 of the telemetry device and the stator 3 of the telemetry device.

[0047] The close connection between the rotor 5 of the telemetry device and the gear under test 6 in structure ensures that the rotor 5 of the telemetry device can rotate synchronously with the gear under test 6, thereby accurately collecting various data of the gear during high-speed rotation. At the same time, the end face of the shaft cylinder of the gear under test 6 cooperates with the snap ring 4 to restrict the axial position of the rotor 5 of the telemetry device, effectively preventing the rotor 5 of the telemetry device from axially moving during high-speed rotation, ensuring the stability of the test device, and further improving the accuracy of the test data. In practical applications, if the rotor 5 of the telemetry device has an axial displacement, it may cause a change in the relative position between the sensor for collecting strain information and the surface of the gear under test 6, resulting in deviation of the collected strain data and affecting the accurate evaluation of the dynamic stress of the gear.

[0048] Specifically, as Figure 2 shown, the rotor 5 of the telemetry device, as a collector, includes a data acquisition unit, a main control unit, a communication unit, and a power management unit.

[0049] The data acquisition unit can perform strain acquisition, temperature acquisition, and rotational speed acquisition. For strain acquisition, the strain signals of the gear under test 6 are collected through a 12-channel resistance strain gauge. The collected strain signals are processed by a strain signal conditioning circuit to provide accurate strain data for subsequent analysis, so as to understand the force deformation of the gear during high-speed rotation. For temperature acquisition, the temperature signals of the gear under test 6 and the internal temperature signal of the rotor 5 of the telemetry device are collected by using a 3-channel PT100. The temperature signals are processed by a temperature signal conditioning circuit to control the cooling system according to the temperature signals and ensure that the device operates within a suitable temperature range. For rotational speed acquisition, the rotational speed signals of the gear under test 6 are collected by means of a 2-channel Hall sensor. The rotational speed signals are processed by a rotational speed signal conditioning circuit for analyzing the dynamic stress changes of the gear at different rotational speeds.

[0050] The main control unit includes a microcontroller and a programmable logic controller, which are responsible for coordinating and controlling the operation of the entire collector and performing preliminary processing and integration of various collected signals. The communication unit consists of a radio frequency coding module and a radio frequency transmitting module, which modulate and transmit the processed signals after radio frequency coding to achieve wireless data transmission.

[0051] The induction power receiving module of the power management unit receives the energy from the induction power supply coil of the stator 3 of the telemetry device, and then supplies analog power, digital power, and communication power to the data acquisition unit, main control unit, and communication unit in the collector through the power management module to ensure the normal operation of each unit.

[0052] The stator 3 of the telemetry device includes an induction power supply coil, a radio frequency receiving antenna, and a permanent magnet. The induction power supply coil cooperates with the induction power receiving module in the collector (the rotor 5 of the telemetry device) to achieve wireless power supply to the rotating collector, solving the drawbacks of traditional lithium battery power supply. The radio frequency receiving antenna receives the radio frequency coded modulation signal transmitted by the collector (the rotor 5 of the telemetry device) to prepare for data transmission to the data transmission controller. The permanent magnet can generate a constant magnetic field. When cooperating with the induction power supply coil, it enhances the magnetic field intensity in the induction area, enabling the induction power supply coil to generate a more stable and stronger alternating magnetic field, thereby improving the efficiency of the induction power receiving module in obtaining electrical energy, ensuring a stable power supply for the collector (the rotor 5 of the telemetry device), and guaranteeing its continuous operation for induction power supply or signal transmission in a high-temperature and high-speed environment.

[0053] The data transmission controller can condition the input power supply to provide a stable power supply for each unit in the data transmission controller. The data transmission controller also includes a microcontroller and a radio frequency decoding unit. The microcontroller processes and controls the signal received by the radio frequency receiving antenna, and the radio frequency decoding unit decodes the radio frequency signal, extracts the valid data, and performs protocol conversion on the decoded data so as to communicate with the host computer.

[0054] The host computer receives information data such as the strain, temperature, and rotational speed of the test gear 6 collected and transmitted by the collector (the rotor 5 of the telemetry device) through the data transmission controller. The installed data acquisition and analysis software can receive, store, and display these data in waveforms, facilitating data analysis by technicians and evaluating the dynamic stress state of the gear.

[0055] As Figure 1 shown, the stator 3 of the telemetry device is installed on the end cover 1. An oil pipe is installed on the end cover 1. One end of the oil pipe passes through the rotor 5 of the telemetry device, and the oil injection port provided on the oil pipe faces the side of the rotor 5 of the telemetry device close to the test gear 6 to spray the cooling oil in the oil pipe onto the rotor 5 of the telemetry device.

[0056] In this embodiment, the interior of the rotor 5 of the telemetry device is hollow. A threaded hole is machined on the end cover 1 for connecting the oil circuit of the circulating cooling device. A metal oil pipe is connected inside the end cover 1, and the oil pipe is connected to the oil circuit. When the end cover 1 is installed on the housing of the gearbox 2, the metal oil pipe passes through the inner hole in the middle of the telemetry device. Four oil injection ports with a reverse angle of 79° are machined on the metal oil pipe for spraying oil to cool the telemetry device. The machining position of the oil injection port is based on making the oil spray column point to the end face of the rotor 5 of the telemetry device.

[0057] The oil pipe is connected to a cooling circulation device. The cooling circulation device includes a cooler, an oil cylinder, an oil pump, a flow meter, and a cooling controller. The cooling controller is connected to a host computer. The cooler, the oil cylinder, the oil pump, the flow meter, and the oil pipe are connected in sequence. The cooling controller controls the operating parameters of the cooler and the oil pump. The flow meter collects flow information and sends it to the cooling controller. The cooler in the cooling circulation device cools the cooling oil in the oil cylinder, and then the oil pump transports the cooling oil to the oil pipe.

[0058] Among them, the cooling controller is connected to the host computer. The host computer real-time feeds back the internal temperature data of the telemetry device received to the cooling controller. As Figure 3 shown, when the circulating cooling device works, the cooling controller receives the temperature data and collects the lubricating oil flow through the flow meter. When the temperature is less than 85 °C, the cooling controller drives the oil pump to spray and cool the telemetry device at a flow rate of 1 L / min; when the temperature is greater than 85 °C, the oil pump speed is increased by an increment of 1 L / min to cool the internal temperature of the telemetry device at 80 °C through constant temperature PID control; when the lubricating oil flow is greater than 5 L / min, the cooler is started so that the return oil can be cooled by the cooler, and then the power of the cooler is regulated through constant temperature PID control to adjust the return oil temperature of the lubricating oil, so that the internal temperature of the telemetry device is continuously controlled at 80 °C.

[0059] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for testing the dynamic stress of gears under high temperature and high rotational speed conditions, characterized in that, Comprising: The rotor of the telemetry device is installed on the gear under test, and the stator of the telemetry device wirelessly powers the rotor of the telemetry device. The rotor of the telemetry device obtains the strain information, temperature information and rotational speed information of the gear under test during high-speed rotation, as well as the internal temperature information of the rotor of the telemetry device, and sends the information data to the data transmission controller wirelessly, and performs data analysis through the upper computer. According to the obtained internal temperature information, the rotor of the telemetry device is cooled by spraying oil to control the temperature of the rotor of the telemetry device within the set range.

2. The gear dynamic stress test method under high temperature and high rotational speed conditions according to claim 1, wherein, The shaft barrel of the gear under test is machined with a groove along the axial direction for accommodating and installing the rotor of the telemetry device.

3. The gear dynamic stress test method under high temperature and high rotational speed conditions according to claim 2, characterized in that, The telemetry device fits circumferentially with the groove and is fixed, and an elastic retaining ring is provided on the end face of the shaft barrel of the gear under test to restrict the axial position of the rotor of the telemetry device.

4. The gear dynamic stress test method under high temperature and high rotational speed conditions according to claim 1, wherein The rotor of the telemetry device and the stator of the telemetry device are spaced apart along the axial direction of the gear under test. An inductive power supply coil is provided on the stator of the telemetry device, and an inductive power receiving module is provided inside the rotor of the telemetry device. The inductive power supply coil wirelessly powers the inductive power receiving module.

5. The gear dynamic stress test method under high temperature and high rotational speed conditions according to claim 4, characterized in that The data transmission controller is connected to the stator of the telemetry device and powers the stator of the telemetry device.

6. The gear dynamic stress testing method under high temperature and high rotational speed conditions according to claim 1 or 4 or 5, characterized in that, The stator of the telemetry device is installed on the end cover, and an oil pipe is installed on the end cover. One end of the oil pipe passes through the rotor of the telemetry device, and the oil injection port provided on the oil pipe faces the side of the rotor of the telemetry device close to the gear under test, and sprays the cooling oil in the oil pipe onto the rotor of the telemetry device.

7. The gear dynamic stress test method under high temperature and high rotational speed conditions according to claim 6, characterized in that, The oil pipe is connected to a cooling circulation device. The cooling circulation device includes a cooler, an oil cylinder, an oil pump, a flow meter and a cooling controller. The cooling controller is connected to the upper computer. The cooler, the oil cylinder, the oil pump, the flow meter and the oil pipe are connected in sequence. The cooling controller controls the operating parameters of the cooler and the oil pump, and the flow meter collects the flow information and sends it to the cooling controller.

8. The method for testing the dynamic stress of a gear under high temperature and high rotational speed conditions according to claim 7, characterized in that The cooling controller receives the internal temperature information of the rotor of the telemetry device, adjusts the operating states of the cooler and the oil pump according to the set control logic, cools the rotor of the telemetry device, and keeps the temperature of the rotor of the telemetry device within the set range.

9. The gear dynamic stress test method under high temperature and high rotational speed conditions according to claim 1, characterized in that, The rotor of the telemetry device sends the obtained information data to the stator of the telemetry device through a radio frequency encoded modulation signal. The stator of the telemetry device has a radio frequency receiving antenna for receiving the radio frequency encoded modulation signal, and is connected to the data transmission controller through an antenna feeder to transmit the radio frequency encoded modulation signal to the data transmission controller.

10. The gear dynamic stress testing method under high temperature and high rotational speed conditions according to claim 9, characterized in that, The upper computer installs data acquisition and analysis software, and receives, stores and can display the information data collected by the rotor of the telemetry device parsed and sent by the data transmission controller in the form of waveforms.

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