Face gear pair tooth surface oil film thickness measuring device and measuring method

Abstract

The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface oil film thickness measuring device and a measuring method, and relates to the technical field of lubrication. The application provides a face gear pair tooth surface

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lubrication technology, in particular to a face gear pair tooth surface oil film thickness measuring device and measuring method. BACKGROUND

[0002] The thickness of the lubricating oil film directly affects the normal operation of mechanical equipment, especially in bearings and gears, the state of the oil film determines the lubrication effect and service life of the workpiece. Traditional oil film thickness measurement methods such as resistance method, capacitance method and laser diffraction method have low measurement accuracy and poor stability. The development of optical fiber sensing technology provides a new way for oil film thickness measurement. Optical fiber displacement sensor has the advantages of high sensitivity, anti-electromagnetic interference, high pressure resistance and corrosion resistance.

[0003] For bearings, the outer ring and the bearing shell are in a fixed state, which provides a good measurement environment, so the above methods are mostly used for oil film thickness measurement of rolling bearings and sliding bearings, but for gears, especially face gears, the oil film thickness is usually in microns or even nanometers, and the measuring equipment requires high precision and resolution. During the operation of the gear, the oil film thickness changes constantly with the rotation of the gear and the change of the load, and real-time measurement of dynamic oil film thickness requires complex signal processing and data analysis technology. The most critical problem is that the face gear pair cannot provide a stable measurement environment during operation, and the position of the meshing part in space is constantly changing, so there is no fixed measurement point, and it is difficult to measure the tooth surface oil film thickness of the gear structure. SUMMARY

[0004] The present application provides a face gear pair tooth surface oil film thickness measuring device and measuring method, which aims to provide a way to measure the tooth surface oil film thickness of the face gear pair without a fixed measurement point.

[0005] In order to achieve the above purpose, the embodiment of the present application provides a face gear pair tooth surface oil film thickness measuring device, which comprises:

[0006] The meshing system comprises an end gear and a spur gear in orthogonal engagement, the spur gear comprises first teeth and second teeth, the first teeth and the second teeth are adjacent, and the first teeth are provided with a first accommodating groove on the tooth surface facing the second teeth and a transparent cover for covering the first accommodating groove;

[0007] The lubricating system comprises an oil inlet pipe for supplying lubricating oil to the end gear and an oil outlet pipe for collecting lubricating oil passing through the end gear, and a temperature detection unit is arranged on the oil inlet pipe and the oil outlet pipe respectively;

[0008] The laser system includes a fiber optic transmitting and receiving probe and a grating array sensor. The fiber optic transmitting and receiving probe is arranged in the first accommodating groove, and the fiber optic transmitting and receiving probe is aligned with the meshing trajectory of the first tooth and the end gear tooth. The grating array sensor is arranged in the top gap formed by the first tooth and the second tooth. The fiber optic transmitting and receiving probe is used to obtain the oil film thickness on the tooth surface of the first tooth, and the grating array sensor is used to obtain the strain of the first tooth.

[0009] Preferably, the meshing system further comprises a first driving unit, the first driving unit comprising a first connecting shaft connected to the spur gear and a first loading module driving the first connecting shaft to rotate;

[0010] A second accommodating groove is provided on the end face of the spur gear, and the second accommodating groove is communicated with the first accommodating groove. The first connecting shaft is provided with an axial groove arranged along the axial direction of the first connecting shaft and a radial groove arranged along the radial direction of the first connecting shaft, and the axial groove is communicated with the radial groove. The second accommodating groove is used to accommodate the cable of the optical fiber transmitting and receiving probe, and the axial groove and the radial groove are used to accommodate the cables of the optical fiber transmitting and receiving probe and the grating array sensor.

[0011] Preferably, the meshing system further comprises a second driving unit, the second driving unit comprising a second connecting shaft connected to the end gear and a second loading module driving the second connecting shaft to rotate, and the first loading module and the second loading module rotate in opposite directions.

[0012] Preferably, the laser system further comprises a first laser emitter and a second laser emitter, wherein the first laser emitter is signal-connected to a fiber optic displacement sensor, the fiber optic displacement sensor is signal-connected to the fiber optic transmitting and receiving probes, the fiber optic displacement sensor is further signal-connected to a photoelectric conversion unit, and the photoelectric conversion unit is signal-connected to a data acquisition system;

[0013] The second laser emitter is signal-connected to the grating array sensor, and the grating array sensor is also signal-connected to the photoelectric conversion unit.

[0014] Preferably, a photoelectric slip ring is provided on the first connecting shaft, and the optical fiber displacement sensor and the optical fiber transmitting and receiving probes, and the grating array sensor and the photoelectric conversion unit are connected by photoelectric slip ring signals.

[0015] The present application also provides a measurement method, using the aforementioned face gear pair tooth surface oil film thickness measurement device, comprising:

[0016] S10 obtains the meshing trajectory of the end gear on the first tooth, and opens a first accommodating groove on the meshing trajectory;

[0017] S20. The optical fiber transmitting and receiving probes are fixed in the first accommodating groove, and the optical fiber transmitting and receiving probes are aligned with the meshing track to form a collection point;

[0018] S30 drives the spur gear and the end gear to rotate, and obtains the first distance and the second distance before and after the lubricant is introduced through the optical fiber transmitting and receiving probe, and obtains the oil film thickness on the tooth surface of the first tooth based on the difference between the first distance and the second distance;

[0019] The first distance is the distance between the optical fiber transmitting and receiving probes and the end gear teeth meshing with the first teeth;

[0020] The second distance is the distance between the optical fiber transmitting and receiving probes and the lubricating oil film formed by the lubricating oil;

[0021] S40. Adjust at least one of the different positions of the collection points on the meshing trajectory, the oil temperature difference, and the strain, and repeat step S30 to determine the lubrication effect of the tooth surface of the first tooth under different meshing conditions and then determine the meshing danger zone of the first tooth.

[0022] Preferably, in step S10, fluorescent material is coated on the teeth of the end gear, and the end gear is driven to rotate, and the trace of the fluorescent material on the first tooth is the meshing track.

[0023] Preferably, in step S20, after the optical fiber transmitting and receiving probes are fixed in the first receiving groove, a transparent cover body that can be covered on the first receiving groove is printed using a transparent material, the transparent cover body is trimmed so that the contour of the transparent cover body matches the involute shape of the first tooth, and a chrome film is plated on the tooth surface of the first tooth where the transparent cover body is set.

[0024] Preferably, in step S30, before driving the spur gear and the end gear to rotate, a reflective material is applied to the teeth of the end gear.

[0025] The above solution of the present invention has the following beneficial effects:

[0026] This application opens a first receiving groove on the tooth surface of the first tooth, and fixes the optical fiber transmitting and receiving probe in the first receiving groove, and uses the reflection of the laser to measure the distance between the optical fiber transmitting and receiving probe and the lubricating oil film or the tooth of the end gear, so as to obtain the thickness of the lubricating oil film. This application solves the problem of difficulty in measuring the thickness of the lubricating oil film on the tooth surface during the rotation of the face gear pair, and provides a new measurement idea. At the same time, combined with the oil temperature difference, strain and lubricating oil film thickness, it can monitor the lubrication status of the tooth surface and better identify the dangerous area.

[0027] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the meshing system and lubrication system;

[0029] Figure 2 is a schematic diagram of the first accommodating tank;

[0030] Figure 3 It is a schematic diagram of the arrangement of the optical fiber transmitting and receiving probes and the grating array sensor;

[0031] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0032] Figure 5 This is a schematic diagram of laser system signal transmission.

[0033] [Description of Reference Numerals]

[0034] 100-meshing system, 110-end gear, 111-second connecting shaft,

[0035] 120-spur gear, 121-first tooth, 122-second tooth, 123-first receiving groove, 124-first connecting shaft, 125-second receiving groove, 126-axial groove, 127-radial groove,

[0036] 200-lubrication system, 210-oil inlet pipe, 220-oil outlet pipe, 211-temperature detection unit, 230-oil station, 240-hydraulic pump, 250-pressure regulating valve, 260-first metering pump, 270-second metering pump,

[0037] 310-fiber optic transmitting and receiving probe, 320-grating array sensor, 330-first laser transmitter, 340-second laser transmitter, 350-fiber optic displacement sensor, 360-photoelectric conversion unit, 370-data acquisition system, 380-photoelectric slip ring, DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1-5As shown, an embodiment of the present invention provides a device for measuring the oil film thickness on the tooth surface of a face gear pair, including a meshing system 100, a lubrication system 200, and a laser system, wherein the meshing system 100 includes an end gear 110 and a spur gear 120 in orthogonal meshing, and the end gear 110 and the spur gear 120 are combined to form a face gear pair, and any tooth on the spur gear 120 is selected as the first tooth 121, and the tooth adjacent to the first tooth 121 is the second tooth 122, and a first accommodating groove 123 is provided on the tooth surface of the first tooth 121 facing the second tooth 122, and the first accommodating groove 123 is located on the meshing trajectory of the first tooth 121 and the tooth of the end gear 110, and a transparent cover is provided on the first accommodating groove 123, and after the transparent cover is covered with the first accommodating groove 123, the outer contour of the first cover is the same as the tooth surface contour of the first tooth 121.

[0040] The lubrication system 200 includes an oil inlet pipe 210 and an oil outlet pipe 220. The oil inlet pipe 210 is used to supply lubricating oil to the end gear 110, and the oil outlet pipe 220 is used to collect the lubricating oil passing through the end gear 110. Temperature detection units 211 are respectively provided on the oil inlet pipe 210 and the oil outlet pipe 220 for detecting the oil inlet temperature and the oil outlet temperature.

[0041] The aforementioned laser system includes a fiber optic transmitting and receiving probe 310 and a grating array sensor 320. The fiber optic transmitting and receiving probe 310 is arranged in the first accommodating groove 123. The fiber optic transmitting and receiving probe 310 is aligned with the meshing trajectory. The grating sensor is arranged in the top gap formed by the first tooth 121 and the second tooth 122. The fiber optic transmitting and receiving probe 310 can obtain the oil film thickness on the tooth surface of the first tooth 121, and the grating array sensor 320 can obtain the strain of the first tooth 121.

[0042] Furthermore, the meshing system 100 also includes a first drive unit and a second drive unit, which respectively drive the spur gear 120 and the end gear 110 to rotate, thereby varying the strain of the first tooth 121 by adjusting the meshing force between the spur gear 120 and the end gear 110. Specifically, the first drive unit includes a first connecting shaft 124 and a first loading module. The first connecting shaft 124 is fixedly connected to the spur gear 120. The first loading module rotates the first connecting shaft 124, thereby causing the spur gear 120 to rotate. A second receiving groove 125 is provided on the end surface of the spur gear 120. The second receiving groove 125 is radially disposed about the spur gear 120 and communicates with the first receiving groove 123. The second receiving groove 125 accommodates the cable of the optical fiber transmitting and receiving probe 310. Preferably, the cable of the optical fiber transmitting and receiving probe 310 is secured within the second receiving groove 125 to prevent the cable from shaking and causing movement of the optical fiber transmitting and receiving probe 310.

[0043] An axial groove 126 and a radial groove 127 are also provided on the first connecting shaft 124, wherein the axial groove 126 is provided along the axial direction of the first connecting shaft 124, and the radial groove 127 is provided along the radial direction of the first connecting shaft 124, the radial groove 127 is connected to the axial groove 126, and the axial groove 126 and the radial groove 127 are connected, and the axial groove 126 and the radial groove 127 are used to accommodate the cables of the optical fiber transmitting and receiving probe 310 and the grating array sensor 320.

[0044] The aforementioned second driving unit includes a second connecting shaft 111 and a second loading module. The second connecting shaft 111 is fixed on the end gear 110. The second loading module drives the end gear 110 to rotate by driving the second connecting shaft 111 to rotate.

[0045] In the present application, both the first loading module and the second loading module are servo motors, and the first loading module and the second loading module drive the spur gear 120 and the end gear 110 to rotate in opposite directions.

[0046] Lubrication system 200 also includes a lubrication box that houses end gear 110 and spur gear 120. End gear 110 and spur gear 120 mesh and rotate within the lubrication box. The aforementioned oil inlet pipe 210 is connected to the top of the lubrication box, and the oil inlet pipe 210 is connected to the bottom of the lubrication box. Lubrication system 200 also includes an oil station 230, which is connected to the oil inlet pipe 210 and the oil outlet pipe 220. The oil station 230, the oil inlet pipe 210, the oil outlet pipe 220, and the lubrication box form an oil circuit.

[0047] A hydraulic pump 240, a pressure regulating valve 250 and a first metering pump 260 are also provided on the oil inlet pipe 210. The hydraulic pump 240 is used to connect to the oil station 230 and adjust the pressure of the pumped oil. The pressure regulating valve 250 is arranged downstream of the hydraulic pump 240, and the first metering pump 260 is arranged downstream of the pressure regulating valve 250. The temperature detection unit 211 located on the oil inlet pipe 210 is arranged between the first metering pump 260 and the pressure regulating valve 250.

[0048] The oil outlet pipe 220 is also provided with a second metering pump 270, which is located upstream of the temperature detection unit 211 located on the oil outlet pipe 220. Preferably, in the present application, in order to better collect the lubricating oil in the lubrication box, the oil outlet pipe 220 has two oil outlet branches, and the two oil outlet branches are respectively provided at the bottom of the lubrication box.

[0049] The aforementioned laser system also includes a first laser emitter 330 and a second laser emitter 340. The first laser emitter 330 is signal-connected to a fiber optic displacement sensor 350, which is signal-connected to a fiber optic transmitting and receiving probe 310. The fiber optic displacement sensor 350 is also signal-connected to a photoelectric conversion unit 360, which is signal-connected to a data acquisition system 370.

[0050] The second laser emitter 340 is signal-connected to the grating array sensor 320 , and the grating array sensor 320 is also signal-connected to the photoelectric conversion unit 360 .

[0051] In the present application, the first laser emitter 330 emits a first emission light signal, which is received by the optical fiber displacement sensor 350 and transmitted to the optical fiber transmitting and receiving probe 310. The optical fiber transmitting and receiving probe 310 sends a first emission light signal to the lubricating oil film or the teeth of the end gear 110, and receives a first reflected light signal formed by reflection. The first reflected light signal is transmitted to the photoelectric conversion unit 360 through the optical fiber displacement sensor 350. After passing through the photoelectric conversion unit 360, the first reflected light signal is resolved into a first electrical signal. The first electrical signal is collected by the data acquisition system 370. The distance between the optical fiber transmitting and receiving probe 310 and the reflecting surface can be obtained through the first electrical signal.

[0052] The second laser emitter 340 emits a second emission light signal, which is received by the grating array sensor 320 and forms a second reflected light signal. The second reflected light signal is transmitted to the photoelectric conversion unit 360 and is analyzed into a second electrical signal. The second electrical signal is collected by the data acquisition system 370, and the strain of the first tooth 121 can be obtained through the second electrical signal.

[0053] Since the spur gear 120 is in a rotating state during the measurement process, the cables between the optical fiber transmitting and receiving probe 310 and the grating array sensor 320 are easily twisted and broken. Therefore, a photoelectric slip ring 380 is provided on the first transmission shaft. The photoelectric slip ring 380 realizes signal connection between the optical fiber displacement sensor 350 and the optical fiber transmitting and receiving probe 310, and between the grating array sensor 320 and the photoelectric conversion unit 360.

[0054] Preferably, a baffle is further provided on the first transmission shaft, which is fixed on the first transmission shaft and is used to press the cables of the optical fiber transmitting and receiving probes 310 and the grating array sensor 320 onto the end face of the spur gear 120 .

[0055] Based on the same inventive concept, the present application also provides a measurement method, using the aforementioned face gear pair tooth surface oil film thickness measurement device, comprising the following steps:

[0056] S10. Obtain the meshing track of the end gear 110 on the first tooth 121, and open the first accommodating groove 123 on the meshing track.

[0057] Specifically, the fluorescent material is coated on some teeth of the end gear 110, the second driving unit works and drives the end gear 110 to mesh with the spur gear 120, and after a certain period of time, the fluorescent material will form a meshing track on the first tooth 121, and the first accommodating groove 123 is opened on the tooth surface of the first tooth 121 having the meshing track.

[0058] S20. Fix the optical fiber emission and receiving probe 310 in the first accommodating groove 123, and adjust the orientation of the optical fiber emission and receiving probe 310 so that the optical fiber emission and receiving probe 310 is aligned with the meshing track. The point of the optical fiber emission and receiving probe 310 aligned with the meshing track is the collection point.

[0059] Based on the structure of the first accommodating groove 123, a transparent cover is printed by using 3D technology, and the transparent cover is used to cover the part of the first tooth 121 filled in the first accommodating groove 123. The transparent cover is shaped so that the profile of the transparent cover is consistent with the involute of the first tooth 121, and the transparent cover and the tooth surface of the first tooth 121 are plated with chromium film and subjected to surface treatment to avoid affecting the meshing performance.

[0060] S30. Apply reflective material on the teeth of the end gear 110 to enhance the reflective ability of the end gear 110. After applying the reflective material, drive the spur gear 120 and the end gear 110 to rotate, obtain the first distance and the second distance, the first distance is the distance between the optical fiber emission and receiving probe 310 and the tooth of the end gear 110 meshing with the first tooth 121 obtained by the optical fiber displacement sensor 350 based on the first incident light signal and the first reflected light signal before the lubricating oil is fed in; the second distance is the distance between the optical fiber emission and receiving probe 310 and the lubricating oil film formed by the lubricating oil after the lubricating oil is fed in. The difference between the first distance and the second distance can obtain the oil film thickness of the tooth surface of the first tooth 121.

[0061] S40. Replace the collection point, the oil temperature difference or the strain of the first tooth 121, and repeat step S40 to judge the lubrication effect of the tooth surface of the first tooth 121 at different meshing periods and further judge the meshing danger zone of the first tooth 121.

[0062] Among them, the collection point is obtained by adjusting the position of the optical fiber emission and receiving probe 310 so that the optical fiber emission and receiving probe 310 is aligned with another part of the meshing track. The oil temperature difference is achieved by adjusting the oil temperature. The strain is achieved by adjusting the torque of the first driving unit and the second driving unit.

[0063] The lubrication effect of the tooth surface under different meshing conditions is judged according to the thickness of the lubricating oil film at different sampling points. The lubricating oil film should not be too thin or too thick. If it is too thin, it may not be able to completely isolate the tooth surface, resulting in boundary lubrication or mixed lubrication between the teeth, increasing wear and friction; if it is too thick, the shear force of the lubricating oil will increase, thereby increasing energy loss and heat.

[0064] The strain and oil temperature differential data are combined to determine the dangerous meshing area of ​​the first tooth 121. Generally speaking, the lower the tooth surface temperature, the better the lubrication effect, and the smaller the tooth surface strain, the longer the gear can operate. Areas with excessively thin or thick oil film thickness, high tooth surface temperature, and concentrated strain are considered dangerous areas. These three types of data are combined to determine the dangerous area. Once the dangerous area is known, the gear can be prevented from entering the dangerous meshing area by improving lubrication conditions and layout, and performing tooth surface treatment, ensuring that the gear operates in a well-lubricated state and extending its service life.

[0065] In the present application, a measuring device and a measuring method are provided to modify and process the first tooth 121 to achieve a measurement environment that meets the requirements of the optical fiber, thereby dynamically measuring the oil film on the tooth surface during the operation of a face gear pair using point contact as a transmission method. The device has high accuracy and resolution, and can dynamically detect the thickness of the lubricating oil film in real time during the operation of the gear.

[0066] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for measuring the oil film thickness on the tooth surface of a face gear pair, characterized in that: include: A meshing system (100) comprises an end gear (110) and a spur gear (120) in orthogonal meshing, wherein the spur gear (120) comprises a first tooth (121) and a second tooth (122), wherein the first tooth (121) and the second tooth (122) are adjacent to each other, and a first accommodating groove (123) is provided on the tooth surface of the first tooth (121) facing the second tooth (122), and a transparent cover body for covering the first accommodating groove (123); A lubrication system (200) includes an oil inlet pipe (210) for introducing lubricating oil into the end gear (110) and an oil outlet pipe (220) for collecting the lubricating oil passing through the end gear (110), wherein the oil inlet pipe (210) and the oil outlet pipe (220) are respectively provided with a temperature detection unit (211); A laser system comprising an optical fiber transmitting and receiving probe (310) and a grating array sensor (320), wherein the optical fiber transmitting and receiving probe (310) is arranged in the first accommodating groove (123), the optical fiber transmitting and receiving probe (310) is aligned with the meshing trajectory of the first tooth (121) and the tooth of the end gear (110), the grating array sensor (320) is arranged in the top gap formed by the first tooth (121) and the second tooth (122), the optical fiber transmitting and receiving probe (310) is used to obtain the oil film thickness on the tooth surface of the first tooth (121), and the grating array sensor (320) is used to obtain the strain of the first tooth (121); The meshing system (100) further includes a first driving unit, the first driving unit including a first connecting shaft (124) connected to the spur gear (120) and a first loading module driving the first connecting shaft (124) to rotate; A second accommodating groove (125) is provided on the end surface of the spur gear (120), and the second accommodating groove (125) is communicated with the first accommodating groove (123). The first connecting shaft (124) is provided with an axial groove (126) arranged along the axial direction of the first connecting shaft (124) and a radial groove (127) arranged along the radial direction of the first connecting shaft (124), and the axial groove (126) is communicated with the radial groove (127). The second accommodating groove (125) is used to accommodate the cable of the optical fiber transmitting and receiving probe (310), and the axial groove (126) and the radial groove (127) are used to accommodate the cable of the optical fiber transmitting and receiving probe (310) and the grating array sensor (320).

2. The device for measuring the oil film thickness on the tooth surface of a face gear pair according to claim 1, characterized in that: The meshing system (100) further includes a second driving unit, the second driving unit including a second connecting shaft (111) connected to the end gear (110) and a second loading module driving the second connecting shaft (111) to rotate, wherein the first loading module and the second loading module rotate in opposite directions.

3. The device for measuring the oil film thickness on the tooth surface of a face gear pair according to claim 1, characterized in that: The laser system further comprises a first laser emitter (330) and a second laser emitter (340); the first laser emitter (330) is signal-connected to an optical fiber displacement sensor (350); the optical fiber displacement sensor (350) is signal-connected to the optical fiber transmitting and receiving probe (310); the optical fiber displacement sensor (350) is further signal-connected to a photoelectric conversion unit (360); and the photoelectric conversion unit (360) is signal-connected to a data acquisition system (370); The second laser emitter (340) is signal-connected to the grating array sensor (320), and the grating array sensor (320) is also signal-connected to the photoelectric conversion unit (360).

4. The device for measuring the oil film thickness on the tooth surface of a face gear pair according to claim 3, characterized in that: A photoelectric slip ring (380) is provided on the first connecting shaft (124), and signal connections are established between the optical fiber displacement sensor (350) and the optical fiber transmitting and receiving probe (310), and between the grating array sensor (320) and the photoelectric conversion unit (360) via the photoelectric slip ring (380).

5. A measurement method, using the face gear pair tooth surface oil film thickness measuring device according to any one of claims 1 to 4, characterized in that: include: S10. Obtaining a meshing track of the end gear (110) on the first tooth (121), and opening a first accommodating groove (123) on the meshing track; S20. Fixing the optical fiber transmitting and receiving probe (310) in the first accommodating groove (123), and aligning the optical fiber transmitting and receiving probe (310) with the meshing track to form a collection point; S30. driving the spur gear (120) and the end gear (110) to rotate, and obtaining a first distance and a second distance before and after the lubricating oil is introduced through the optical fiber transmitting and receiving probe (310), and obtaining the oil film thickness on the tooth surface of the first tooth (121) based on the difference between the first distance and the second distance; The first distance is the distance between the optical fiber transmitting and receiving probe (310) and the teeth of the end gear (110) meshing with the first teeth (121); The second distance is the distance between the optical fiber transmitting and receiving probe (310) and the lubricating oil film formed by the lubricating oil; S40. Adjust at least one of the different positions of the acquisition point on the meshing trajectory, the oil temperature difference, and the strain, and repeat step S30 to determine the lubrication effect of the tooth surface of the first tooth (121) under different meshing conditions and then determine the meshing danger zone of the first tooth (121).

6. The measuring method according to claim 5, wherein: In step S10, a fluorescent material is coated on the teeth of the end gear (110), and the end gear (110) is driven to rotate. The trace of the fluorescent material on the first tooth (121) is the meshing track.

7. The measuring method according to claim 5, wherein: In step S20, after the optical fiber transmitting and receiving probe (310) is fixed in the first accommodating groove (123), a transparent cover body that can be covered on the first accommodating groove (123) is printed using a transparent material, the transparent cover body is modified so that the contour of the transparent cover body matches the involute shape of the first tooth (121), and a chrome film is plated on the tooth surface of the first tooth (121) where the transparent cover body is provided.

8. The measuring method according to claim 5, wherein: In step S30, before driving the spur gear (120) and the end gear (110) to rotate, a reflective material is applied to the teeth of the end gear (110).

Images