Calculation Method and System for Operating State of Thrust Bearing Based on Force and Temperature of Oil Film

Abstract

The present invention provides a method and system for calculating the working state of a thrust bearing based on the force and temperature of the oil film. The present invention obtains data of the thrust insert by installing an oil tank temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor and a body temperature sensor on the thrust insert, and constructs a model from the obtained data, thereby inspecting the working force-receiving state of the installed insert and establishing a dynamic operating standard, as well as judging whether the equipment set operates safely, and monitoring the force-receiving state and working state of the thrust bearing more scientifically, reliably, in real time and intuitively, thereby filling the gap in the force-receiving monitoring technology of the thrust bearing. Based on this, the application software developed to automatically diagnose and analyze the working state of the equipment set according to the operation of the mathematical model supports the intelligent maintenance and status preservation of the equipment set. This model is of great significance for building a platform for intelligent maintenance and management of bearings.

Description

Technical Field

[0001] The present invention relates to the field of bearing maintenance management, and particularly relates to a calculation method and system for the operating state of a thrust bearing based on the force and temperature of an oil film.

Background Art

[0002] Thrust bearings are used in many fields such as hydraulic power generation, wind power generation, nuclear power generation, industrial gearboxes, and special industries. A thrust bearing in operation is of great significance to the safety, stability, and reliability of the operation of a device set, and its force-bearing state directly affects whether the device set can operate safely. Therefore, the nested force plays an important role as one of the important indicators for diagnosing the operating state of a thrust bearing.

[0003] At present, the stress state of the nested structure of the thrust bearing has always been one of the hot and difficult issues that attract long-term attention in the field of bearings, especially in the field of composite material bearings. The national standard GB / T8564-2003 "Technical Specifications for the Installation of Hydrogenerator Sets" is the basis for the installation, trial operation and testing of hydrogenerator sets and their auxiliary equipment, and is also the main content of the acceptance inspection of equipment sets applicable to the installation of various hydrogenerator sets and their auxiliary equipment. The water conservancy industry standard SL668-2014 "Working Guidelines for the Installation and Adjustment of Thrust Bearings and Guide Bearings for Hydrogenerator Sets" discloses the installation and adjustment process of thrust bearings and guide bearings for hydrogenerator sets (including babbit alloy nested structures and composite material thrust bearings). The above standards describe whether the installation and adjustment of the thrust bearing are qualified. However, in the case of acceptance inspection, whether to use its acceptance inspection criteria as the installation criteria, or to refer to the experience and perception of the operator to judge whether the installation is qualified based on the temperature difference of the nested structure. During the implementation of the standard, since the degree of newness and support method of the equipment set are always different, there is no choice but to rely on the experience and perception of the operator. Each hydrogenerator set mainly judges whether the installation state is qualified by referring to whether the temperature difference between adjacent nested structures during operation is lower than 3°C. This method is the acceptance inspection criterion for babbit alloy thrust nested structures. However, composite material thrust bearings have excellent heat resistance and low thermal conductivity, and there is a time lag in the temperature of the nested structure. Therefore, it is inaccurate and unscientific to judge the stress based on the temperature difference.

[0004] Regarding babbit alloy bearings and composite material thrust bearings, the installation and acceptance inspection criteria in other application fields often rely on the experience and perception of operators in many cases. For example, in the field of industrial gearboxes, a common means to detect whether the stress on the thrust nested structure is uniform is to observe whether the colored area of the thrust nested structure reaches more than 90% during installation. There is still a blank in monitoring whether the thrust nested structure is stressed in the operating state.

[0005] Some research institutions assist in the installation and adjustment of thrust bushings using the strain gauge method. However, in the actual application process, it is often restricted by the actual position and working conditions. This method is mostly limited to the experimental research state. To inspect the installation results of thrust bushings, an effective and practical monitoring and acceptance inspection method is still needed.

[0006] Currently, during the operation of babbit alloy bearings, due to different working conditions of hydro-generator sets, there are various usage criteria. For example, some hydro-generator sets issue an alarm when the temperature of the bushing reaches 60°C and shut down when it reaches 65°C, while some hydro-generator sets issue an alarm when the temperature of the bushing reaches 80°C and shut down when it reaches 85°C. In the operation of composite material bearings, there is only one standard, which is to use the temperature of the thrust bushing as the standard for alarm and shutdown. The composite material thrust bearing issues an alarm when the temperature of the bushing reaches 60°C and shuts down when it reaches 65°C. Generally, in the actual operation process, the lower the temperature of the bushing, the better.

Summary of the Invention

Problems to be Solved by the Invention

[0007] In the present invention, according to the above technical problems, a calculation method and system for the operating state of a thrust bearing based on the force and temperature of an oil film are provided. Through this calculation system, the present invention scientifically and reliably monitors the operating force condition and operating state of a composite material thrust bearing in real time, avoids the unreasonableness of using the temperature difference of the bushing as the standard for installation and acceptance inspection, fills the gap in the technology of monitoring the force on the bushing, and establishes a new standard for the installation and dynamic acceptance inspection of composite material thrust bushings. Moreover, the application software developed based on this to automatically diagnose and analyze the operating state of the equipment set according to the new operating standard supports the intelligent maintenance management and condition preservation of the equipment set. This model is used as a basic condition for constructing a maintenance management platform for composite material bearings.

Means for Solving the Problems

[0008] A method for calculating the operating state of a thrust bearing based on the force and temperature of an oil film, which is one aspect of the present invention, comprises: Step 1: Install an oil inlet temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor, and a body temperature sensor on the thrust collar to obtain real-time data of the oil inlet temperature or oil groove temperature, oil film temperature, and body temperature of the thrust collar during the operation of the equipment set. Step 2: Calculate the average oil inlet temperature value, oil film force temperature value, average bearing force temperature value, and single collar force ratio value of the bearing based on the oil inlet temperature and oil film temperature of each collar during the operation of the equipment set, and calculate the difference value MT between the oil film temperature and the body temperature based on the oil film temperature and body temperature of a single collar. Step 3: Calculate the average force ratio pressure of the bearing based on the load ratio pressure during the operation of the equipment set. Step 4: Obtain the force ratio pressure of each single collar based on the average force ratio pressure of the bearing and the single collar force ratio value. Step 5: Establish the bearing operation standard and mathematical model of the equipment set based on various force distribution states and MT values of the collars over the product life under the working conditions of the bearing, monitor the operating state of the thrust bearing in real time based on the model, and automatically diagnose and analyze the operating state of the equipment set.

[0009] Furthermore, the average oil inlet temperature value of the bearing is calculated by the following formula.

Equation

Equation

[0010] Furthermore, calculate the oil film bearing force temperature value using the following formula.

Number

Number

[0011] Furthermore, calculate the average roller bearing force temperature using the following formula.

Number

Number

[0012] Furthermore, calculate the single-row bearing force ratio using the following formula.

Number

Number

[0013] Furthermore, calculate the bearing force ratio pressure value using the following formula.

Number

Number

[0014] Furthermore, the difference value MT between the oil film temperature and the body temperature is calculated by the following formula. MT x = T o,x - T p,x MT 極限 = MT min Here, MT x represents the difference value °C between the oil film temperature and the body temperature of the thrust roller of number x, T o,x represents the oil film temperature °C of the thrust roller of number x, T p,x represents the body temperature °C of the thrust roller of number x, x is the number of the thrust roller, for example, 1, 2, 3, ···, n, and MT min represents the minimum MT value °C in this case, and MT 極限 represents MT when the frictional torque changes min is represented.

[0015] Furthermore, the bearing operation has three-level standards of red, yellow, and green divided according to the single-roller force state ratio, standard change ratio value, and MT value. Regarding the three-level standards of red, yellow, and green for the bearing operation, whether the frictional torque fluctuates based on the establishment of a mathematical model by simulating the actual and extreme working conditions on a simulation test bench, or whether the force state curves of two or more thrust rollers change downward under high-speed and high-load conditions, or MT 極限 occurring under low-speed and high-load conditions is regarded as the red operation standard, the downward change of the force state curve of a single thrust roller is regarded as the yellow operation standard, and the tendency of the force state curve of the thrust roller to be stable is regarded as the green operation standard.

[0016] A calculation system for the operating state of a thrust bearing based on the force and temperature of an oil film, which is another aspect of the present invention, A data collection device having an oil sump temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor, and a body temperature sensor attached to a thrust bearing, a signal collection module, an upper operation control machine, and a data display software interface, in order to obtain real-time data of the oil sump temperature and / or the oil groove temperature, the oil film temperature, and the body temperature of each nested part during the operation of each equipment set, Based on the collected data, calculate the average oil sump temperature value, the oil film force temperature value, the average bearing force temperature value, and the single-nested part force ratio value of each nested part, calculate the difference value MT between the oil film temperature and the body temperature based on the oil film temperature and the body temperature of the single nested part, calculate the average bearing force ratio pressure based on the load ratio pressure during the operation of the equipment set, and obtain the force ratio pressure of each single nested part based on the average bearing force ratio pressure and the single-nested part force ratio value. A data calculation device, A data analysis device that models based on the calculated values and automatically diagnoses and analyzes the operating state of the equipment set according to preset standards, is provided, The data calculation device is a calculation method based on the logical relationship between data, and displays the final result through programming in the data collection device, Based on the results from the data calculation device, the data analysis device determines the deviation between the actual value and the preset standard by comparing with the preset standard in real time, and integrates it into the software interface to automatically execute and display the diagnosis result, Specifically, the preset standard is a dynamic operating standard established by comparing the bearing force state according to the current mounting standard of the bearing. The bearing operation has a three-level standard of red, yellow, and green classified according to the force state ratio of the single nested part, the standard change ratio value, and the MT value. For the three-level standard of red, yellow, and green of the bearing operation, whether the friction torque fluctuates based on establishing a mathematical model by simulating the actual and extreme working conditions on a simulation test bench, or whether the force state curves of two or more thrust bearings change downward under high-speed and high-load conditions, MT 極限Taking place under low-speed and high-load conditions as the red operation standard, the downward change of the force-receiving state curve of a single thrust bearing as the yellow operation standard, and the tendency of the force-receiving state curve of the thrust bearing to be stable as the green operation standard.

[0017] Furthermore, the data collection device further comprises a weighing sensor, calculates the force-receiving temperature through the weighing sensor, verifies the bearing force operation state, and can establish a dedicated bearing operation standard because the materials of the thrust bearings used in various equipment sets are different, or the new and old of the equipment sets are different, or the force-receiving differences when installing the thrust bearings are different. By fusing the thrust bearing operation data of the equipment sets through the platform and converting it into a logical calculation formula according to the standard, a bearing force analysis model is established as the basic condition for constructing a platform for the maintenance and management of sliding bearings.

[0018] The force-receiving analysis method and model monitor the force-receiving state of a single thrust bearing in real time, and automatically generate a force-receiving state analysis report through the platform according to the dynamic operation mathematical model standard.

[0019] The present invention not only inspects the operating force-receiving state of the installed bearing and establishes a dynamic operation standard by constructing a model from the obtained data, but also judges whether the equipment set operates safely, monitors the force-receiving state and operating state of the thrust bearing more scientifically, reliably, in real time and intuitively, and fills the gap in the force-receiving monitoring technology of the thrust bearing. Based on this, the application software developed to automatically diagnose and analyze the operating state of the equipment set according to the operation of the mathematical model supports the intelligent maintenance management and condition preservation of the equipment set. This model is of great significance for constructing a platform for the intelligent maintenance management of bearings.

Brief Description of the Drawings

[0020] To more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the attached drawings required for the description of the embodiments or the prior art. The following attached drawings are some embodiments of the present invention. It goes without saying that those skilled in the art can obtain other attached drawings based on these attached drawings without creative labor.

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0022] To clarify the objectives, technical means, and advantages of the embodiments of the present invention, hereinafter, while referring to the drawings in the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described. It goes without saying that the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present invention shall all be included in the scope protected by the present invention.

[0023] The principle of the calculation method for the operating state of the thrust bearing based on the oil film force and temperature according to the present invention is as follows. A set of thrust bearings is generally composed of N thrust rollers. During the operation of the equipment set, a wedge-shaped gap, i.e., an oil film, is formed between the operating surface of the roller and the thrust flange (mirror plate). When the thrust flange rotates, the lubricating oil is compressed in the wedge-shaped gap, and the pressure increases. Therefore, this oil film layer has the ability to withstand the axial thrust. At the same time, after the lubricating oil is subjected to friction and generates heat, it flows out, playing roles such as reducing friction and eliminating wear. At this time, the temperature difference between the oil inlet temperature and the oil film temperature is the oil film force-bearing temperature of the thrust roller. The oil film pressure, oil film temperature, and oil film thickness are mainly related to shape factors such as the surface load specific pressure of the roller, the relative movement speed between the thrust flange and the thrust roller, the flatness of the operating surface of the thrust flange, the oil inlet temperature, the oil viscosity, and the size of the roller surface. Shape factors such as the relative movement speed between the thrust flange and the thrust roller, the flatness of the working surface of the thrust flange, and the size of the roller surface do not change during the operation of the equipment set. Since the oil viscosity changes with the oil inlet temperature, the oil film temperature is mainly related to the oil inlet temperature, the surface load specific pressure (load) of the roller, and the speed. Furthermore, the gradient difference between the oil film temperature and the oil inlet temperature, i.e., the oil film force-bearing temperature of the thrust roller, corresponds to the surface load specific pressure of the roller under specific speed conditions, or the roller surface corresponds to the rotation speed of the mirror plate under specific specific pressure conditions. Thereby, the relationship between the oil film force-bearing temperature of the thrust roller and the surface load specific pressure (load or force) or speed of the roller is established.

[0024] The specific implementation process is as follows. Step 1: Install an oil filling temperature sensor (or oil groove), an oil film temperature sensor, and a body temperature sensor on the thrust bearing to obtain real-time data on the oil filling temperature, oil film temperature, and body temperature of each thrust bearing during the operation of the equipment set. Step 2: Install the thrust bearing according to national (industry) standards, establish a bearing static acceptance inspection standard by comparing with the standard, establish a dedicated standard for the dynamic operating force state, and after the bearing static acceptance inspection is completed, establish a dedicated new standard for the dynamic operation of the equipment set bearing according to the comparison with national (industry) standards and various support methods for new and old equipment sets. Step 3: Calculate the average oil filling temperature value (or oil groove temperature), oil film force temperature value, average force temperature value, and single bearing force ratio value of the bearing based on the oil filling temperature and oil film temperature of each bearing during the operation of the equipment set, and calculate the MT value based on the oil film temperature and body temperature of a single bearing. Step 4: Calculate the average force ratio pressure of the bearing based on the load ratio pressure (load) during the operation of the equipment set. Step 5: Obtain the force ratio pressure (load) of each single bearing based on the average force ratio pressure of the bearing in Step 4 and the single bearing force ratio value in Step 3, respectively. Step 6: Establish an operating standard for the oil film temperature by comparing with the working temperature standard of the bearing of the thrust bearing according to national (industry) standards. Step 7: Establish a three-level dynamic operation standard of red, yellow, and green and a mathematical model aiming at the operation of the equipment set bearing based on various force distribution states and MT values of the bearing during the product life under the working conditions of the bearing. Step 8: According to the above mathematical model, cooperate with various professional research and development and manufacturing teams to develop software for the mathematical model for relevant information, and build a Butler service IoT platform for the intelligent maintenance and management of the sliding bearing system.

[0025] (Example 1) Comparative verification of the calculation method for the operating state of a thrust bearing based on the force and temperature of the oil film.

[0026] In the test bench, it is 8 pieces / set and 245 cm 2Install an elastic metal or plastic casing with a standard of [number] per piece. For test casings numbered 1# to 8#, install a body temperature sensor, an oil film temperature sensor, and a weighing sensor. For test casings numbered 1#, 3#, 5#, and 7#, install an oil sump temperature sensor. Install a thrust bearing according to the "Thrust Bearing Installation Standard" and pass the acceptance inspection. Simulate a hydroelectric equipment set operating at a linear velocity of 12.6 m / s and a specific pressure of 3.92 MPa. Adjust the flow rate of the cooling water and the lubricating oil to control the oil sump temperature to about 35°C. Apply the load step by step according to 10% of the full load. After each step operates stably for 1 hour, record the parameters and calculate the force on a single bearing during operation. By comparing the force ratio of a single bearing with the change in the numerical ratio of the weighing sensor, verify the accuracy and reliability of calculating the force ratio of a single bearing using the force formula of a single bearing.

[0027] Table 1 shows each parameter during the test operation. (Table 1) Each parameter during the simulation of the operation of a certain hydroelectric equipment set by an intelligent bearing test bench

Table 1

[0028] Taking a specific pressure of 0.39 MPa as an example, the force on a single bearing is calculated as follows.

[0029] (1) Calculate the average oil sump temperature.

Number

Number

[0030]

Number

[0031] (2) Calculate the oil film force-bearing temperature value. T s,x = T o,x - T i,x Here, T s,x represents the single-collar force-bearing temperature value in °C of the thrust bearing numbered x, T o,x represents the oil film temperature value in °C of the thrust bearing numbered x, T i,x represents the main body oil-filled temperature value in °C of the thrust bearing numbered x, where x is the number of the thrust bearing, for example, 1, 2, 3, ···, n.

[0032] T s,1 = 44.06 - 34.57 = 9.49 °C T s,2 = 47.5 - 34.57 = 12.93 °C T s,3 = 43.8 - 34.57 = 9.23 °C T s,4 = 39.4 - 34.57 = 4.83 °C T s,5 = 46.7 - 34.57 = 12.13 °C T s,6 = 40.8 - 34.57 = 6.23 °C T s,7 = 47.4 - 34.57 = 12.83 °C T s,8 = 50.2 - 34.57 = 15.63 °C

[0033] (3) Calculate the average collar force-bearing temperature.

Number

Number

[0034]

Number

[0035] (4) Calculate the single-nested bearing force ratio.

Number

Number

[0036]

Number

[0037] (5) Calculate the nested bearing force ratio pressure value.

Number

Number

[0038]

Number

[0039] (6) Calculate the single-nested force-bearing mass value. P x =(m x *g) / s, then m x =P x *(s / g), and here, P x represents the thrust roller specific pressure MPa of number x, S represents the area mm of the surface of a single thrust roller 2 , m x represents the thrust bearing force kg of number x, g represents the acceleration due to gravity, and its value is set to 10 m / s 2 .

[0040] S = 24500 mm 2 m 1 =P 1 *(s / g)=0.36*(24500 / 10)=871 kg m 2 =P 2 *(s / g)=0.48*(24500 / 10)=1187 kg m 3 =P 3 *(s / g)=0.35*(24500 / 10)=847 kg m 4 =P 4 *(s / g)=0.18*(24500 / 10)=443 kg m 5 =P 5 *(s / g)=0.45*(24500 / 10)=1113 kg m 6 =P 6 *(s / g)=0.23*(24500 / 10)=572 kg m 7 =P 7*(s / g)=0.48*(24500 / 10)=1177kg m 8 =P 8 *(s / g)=0.59*(24500 / 10)=1434kg

[0041] (7) Calculate the MT value. MT x =T o,x -T p,x MT 極限 =MT min Here, MT x represents the difference in °C between the oil film temperature and the body temperature of the thrust bearing of number x, T o,x represents the oil film temperature in °C of the thrust bearing of number x, T p,x represents the body temperature in °C of the thrust bearing of number x, x is the number of the thrust bearing, for example, 1, 2, 3, ···, n, and MT min represents the minimum MT value in °C of this grade, MT 極限 represents MT when changing the frictional torque min is expressed.

[0042] MT 1 =T o,1 -T p,1 =44.06 - 36.33 = 7.73°C MT 2 =T o,2 -T p,2 =47.05 - 36.22 = 11.23°C MT 3 =T o,3 -T p,3 =43.80 - 36.14 = 7.66°C MT 4 =T o,4 -T p,4 =39.40 - 36.20 = 3.20°C MT 5 =T o,5 -T p,5 =46.70 - 36.58 = 10.12°C MT 6 =T o,6 -T p,6 =40.80 - 36.74 = 4.06°C MT 7=T o,7 -T p,7 =47.40 - 36.09 = 11.31 °C MT 8 =T o,8 -T p,8 =50.20 - 37.15 = 13.05 °C

[0043] The MT value of the nested type is 3.2 to 13.05 °C.

[0044] For the same reason, when the specific pressures are 0.78 MPa, 1.18 MPa, 1.57 MPa, 1.96 MPa, 2.35 MPa, 2.74 MPa, 3.14 MPa, 3.53 MPa, and 3.92 MPa respectively, the single-nested force-bearing specific pressure and the single-nested force-bearing ratio are calculated, and the results are shown in Table 2 below.

[0045] Taking the force-bearing ratio as the vertical axis and the load (specific pressure) or temperature or time as the horizontal axis, a mathematical model is established. The data on the change in the operating state of each nested unit under various working conditions are substituted into the mathematical formula for calculation to display the operating state of each nested unit. In Example 1, taking the force-bearing ratio as the vertical axis and the specific pressure as the horizontal axis, a mathematical model is established to compare the similarities and differences between the two calculation methods and diagnose the operating state of the nested unit according to the standard.

[0046] A mathematical model is established for the elastic metal-plastic nested unit according to the operating results simulating the hydraulic generator set. Figure 2 shows the mathematical analysis based on the force-bearing calculation results, and Figure 3 shows the mathematical analysis based on the data calculation of the weighing sensor. Figure 4 shows the mathematical comparison and analysis based on the force-bearing calculation and weighing calculation of the 4# test nested unit.

[0047] During the test, the torque did not fluctuate. However, analyzing from the mathematical analysis results of the force-bearing calculation in Figure 2, the nested unit during operation is MT minWhen the temperature reaches 3.2°C and the specific pressure is lower than 1.18 MPa, the force-bearing state of each nested part fluctuates slightly and tends to stabilize after 1.18 MPa. The main reason is that when the load is low, the elastic metal-plastic nested part performs self-adjustment, and after the load increases, the force-bearing of the nested part tends to stabilize. It can be seen that although the force-bearing ratios of each nested part obtained by force-bearing calculation are relatively scattered, the force-bearing ratios during operation under various specific pressure conditions tend to be consistent, with relatively good stability and relative parallelism, and a certain regularity, indicating that the nested part operates normally.

[0048] (Table 2-1) Parameters and force-bearing ratios of the elastic metal-plastic nested part during the simulation of the operation of a certain hydroelectric equipment set

Table 2-1

[0049] According to the mathematical result analysis based on the data calculation of the weighing sensor in Figure 3, for the force-bearing ratio, when the pressure is 0.39 MPa, the lower limit is 0.69 and the upper limit is 1.33; when the pressure is 1.18 MPa, the lower limit is 0.89 and the upper limit is 1.24; when the pressure is 3.92 MPa, the lower limit is 0.95 and the upper limit is 1.10. From this, it can be seen that the force-bearing ratio converges concentratedly with the increase of the specific pressure.

[0050] According to Figure 4, under the same conditions, for the 4# test nested part by force-bearing calculation, when the pressure is 3.92 MPa, the force-bearing ratio is 0.77 and the weighing force-bearing ratio is 1.09. The weighing force-bearing ratio is obtained from the data of the weighing sensor, and the weighing sensor is installed under the support bolt of the thrust nested part to directly measure the actual force-bearing value of each nested part. Therefore, the actual force-bearing ratio of the 4# nested part is 1.09. The lubrication force-bearing ratio is closely related to the oil film temperature, oil film thickness, and friction and wear conditions. Differences in factors such as the elastic modulus of the plastic nested part, the flatness of the mirror plate, and the inclination angle of the support structure affect the operating state, oil film formation, and friction state of each nested part, causing differences in the oil film temperature of each nested part. Therefore, the lubrication force-bearing ratio of the 4# nested part is 0.77, which actually reflects the lubrication force-bearing state of the single nested part surface.

[0051] (Table 2-2) Parameters and force-receiving ratios of the elastic metal-plastic sleeve during the simulation of the operation of the hydroelectric equipment set

Table 2-2

[0052] To summarize, the force-receiving calculation is theoretically feasible as a method first proposed for calculating the operating state of the bearing. Moreover, although verification is also necessary, since the weighing sensor is a common method for measuring the force-receiving, the weighing calculation is cited here. Comparing Figures 2, 3, and 4, it can be seen that under the same conditions, the force-receiving ratio of the sleeve obtained by the force-receiving calculation basically agrees with that obtained by the weighing calculation, showing relative parallelism.

[0053] The variation trend of the force-receiving calculation is better than that of the weighing calculation. When performing the force-receiving calculation, the value of the oil film temperature is set to the temperature at the theoretically highest point on the surface of the sleeve, rather than the average oil film temperature on the surface of the sleeve. Therefore, the force-receiving calculation is derived from the temperature parameter and is related to the operation, oil film formation, and friction state of the sleeve during the operation of the equipment set. Differences in factors such as the elastic modulus of each sleeve, the flatness, and the inclination angle of the thrust flange (mirror plate) cause differences in the operating state, oil film formation, and friction state of each sleeve. Therefore, the force-receiving ratio is related to the operating state (lubrication, boundary lubrication) of the sleeve. Without changing the total load of the set of sleeves, the oil film temperatures of each sleeve are different, and the force-receiving is scattered. Therefore, the force-receiving calculation method further promotes the construction of the mathematical model and the early diagnosis of the sleeve, and supports the intelligent maintenance management and condition preservation of the equipment set.

[0054] (Example 2) Simulate the equipment set to conduct standard comparison and standard establishment, and establish the dynamic operation standards of red, yellow, and green.

[0055] 2.1 6 pieces / set and 210 cm 2Fix the babbit alloy test insert with a fixed support at the standard of [number] per piece. Install a body temperature sensor and an oil film temperature sensor in the test inserts numbered 1# to 6#. Install an oil temperature sensor in the test inserts numbered 2#, 4#, and 6#. Install an oil groove temperature sensor in the middle of the oil tank. Install the insert according to the "Thrust Bearing Installation Standard" and pass the acceptance inspection. Simulate the high-speed and heavy-load working conditions of the hydroelectric equipment set, set the linear velocity to 26.8 m / s, and set the specific pressure to 4.50 MPa. Under the full-load working conditions, control the flow rate of the cooling water and the flow rate of the lubricating oil, set the oil groove temperature to 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, and record the parameters after 1 hour of stability.

[0056] Establish a mathematical model with the stress ratio as the vertical axis and load (specific pressure), temperature, oil film temperature, MT value, etc. as the horizontal axis. Substitute the data of the operating state changes of each insert under various working conditions into the formula for calculation, and display the operating state of each insert. As shown in Figure 5, construct a red-yellow-green analysis model for insert operation.

[0057] When the babbit alloy insert is in high-temperature extreme operation with the linear velocity set to 26.8 m / s and the specific pressure set to 4.50 MPa, and the oil groove temperature is about 35 - 50°C, the stress on each insert tends to be stable, which is called green operation. After the oil temperature is about 50°C, the stress ratio of the 4# test insert tends to decrease from 0.97 at about 50°C of the oil temperature to 0.92 at about 60°C of the oil temperature. After reaching about 60°C of the oil temperature, the stress ratio of the 6# test insert also decreases. Therefore, when the oil groove temperature is about 50 - 60°C, it is called yellow operation, and when the oil groove temperature is about 60°C or higher, it is called red operation. When the oil is filled at about 75°C, the torque changes, and at this time MT 極限 =MT 4 = 6.9°C. Through simulation tests and mathematical analysis, establish the red-yellow-green state standard for insert operation, and set a new standard for the oil film temperature as shown in Table 3 with reference to the body temperature.

[0058] (Table 3) Operating Standards for Babbit Alloy Inserts

Table 3

[0059] Compared with the existing standard for the nested operation of some hydroelectric equipment sets, which states that "an alarm is issued when the body temperature reaches 80°C and the unit shuts down when it reaches 85°C", for this standard, an alarm is issued when the oil film temperature reaches (95 - 100)°C and the unit shuts down when it reaches 100°C. (Note: The red-yellow-green temperature standards corresponding to various equipment sets need to be different, and a certain safety margin needs to be left during the actual operation of the equipment set. Therefore, the operating standard temperature of this simulation test is higher than the actual operation of the equipment set and can be adjusted appropriately.)

[0060] 2.2 6 pieces / sets and 210 cm 2 Fix the elastic metal-plastic nested parts with a standard of 210 cm / piece using a fixed support. Install a body temperature sensor and an oil film temperature sensor on any of the 1# - 6# test nested parts, install an oil sump temperature sensor on the 2#, 4#, and 6# test nested parts, and install an oil groove temperature sensor in the middle of the oil tank. Install the thrust bearing according to the "Thrust Bearing Installation Standard" and pass the acceptance inspection. Simulate the high-speed and heavy-load working conditions of the hydroelectric equipment set, set the linear velocity to 26.8 m / s, and set the specific pressure to 4.50 MPa. Under full-load working conditions, control the flow rate of the cooling water and the flow rate of the lubricating oil to set the oil groove temperature to 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C (stop when the torque changes), and record the parameters after 1 hour of stability for each level. As shown in Figure 5, construct a red-yellow-green analysis model for the nested operation.

[0061] For the elastic metal-plastic nested parts, when the linear velocity is set to 26.8 m / s, the specific pressure is set to 4.50 MPa, and the torque changes when the oil sump temperature reaches 75°C, MT 極限 =MT 4 =19.4°C, reaching the limit operation, and the force ratio of the 4# test nested part is 0.96, and at this time, it is judged to meet the red shutdown standard. When the oil sump temperature of the nested part is between 35 - 75°C, the force fluctuates slightly, but there is an overall consistent trend, and MT = 20.3 - 38°C > MT 極限and the nested structure is in a green healthy operating state. In this test, the set conditions for yellow operation standard did not appear. However, when the MT value changes and the stress ratio becomes abnormal in the nested structure, it will cause yellow operation to still occur under actual working conditions. Through simulation tests, establish the red-yellow-green state standard for elastic metal-plastic bearings, and set a new standard for oil film temperature as shown in Table 4 with the body temperature as a reference.

[0062] In actual applications, the operation of the above-mentioned equipment set according to the three-level standard of red-yellow-green may involve different adopted bearing materials, different new and old equipment sets, or different stresses when installing the nested structure. Therefore, it is necessary to cooperate with the using organization (industry experts) to establish a dedicated bearing operation standard in combination with the actual situation, including the standards for green healthy state, undetermined state of yellow sub-healthy inspection, and red alarm shutdown.

[0063] (Table 4) Operating standards for elastic metal-plastic thrust bearings

Table 4

[0064] This test standard exceeds the existing standard of "issuing an alarm when the body temperature reaches 65°C" for the operation of the nested structure of hydroelectric generator sets. The newly established standard for the operation of the simulated hydroelectric generator set with elastic metal-plastic nested structures is that an alarm will be issued when the maximum oil filling temperature reaches 75°C and the oil film temperature reaches 105°C. (Note: The red-yellow-green temperature standards corresponding to different equipment sets need to be different, and a certain safety margin needs to be left during the actual operation of the equipment set. Therefore, the temperature of the operation standard of this simulation test is higher than the actual operation of the equipment set and can be adjusted appropriately.)

[0065] (Example 3) Analyze the influence of the design of open high-pressure oil holes on the operating state of elastic metal-plastic nested structures based on the model.

[0066] When using babbitt alloy bushings in large equipment sets, a high-pressure hydraulic installation design is adopted. During the startup and shutdown processes, the mirror plate is lifted to initially form an oil film on the surface of the bushing, preventing the occurrence of bushing burning accidents in a semi-dry friction state between the thrust bearing and the mirror plate. After replacing the babbitt alloy bushings with elastic metal-plastic bushings in some equipment sets, the design of the bushing surface of the high-pressure hydraulic installation is still maintained. However, since elastic metal-plastic bushings have excellent anti-friction and self-lubricating properties, there is no need for a high-pressure hydraulic installation. At this time, the influence of the bushing surface with high-pressure oil holes on the lubricating oil film state during the operation of the bushing becomes a problem worthy of study. In Example 3, the influence of the presence or absence of high-pressure oil holes on the operating state of elastic metal-plastic bushings is studied by means of numerical analysis.

[0067] Type of test bushing: 1) A typical elastic metal-plastic test bearing with a specification of 8 pieces / set and 210 cm 2 / piece is fixed to the support column with a fixed support, and an oil film temperature sensor and a body temperature sensor are installed on each bushing. An oil inlet temperature sensor is installed on the 1#, 3#, 5#, and 7# test bushings. 2) An elastic metal-plastic test bearing with high-pressure oil holes opening with a specification of 8 pieces / set and 210 cm 2 / piece is fixed to the support column with a fixed support, and an oil film temperature sensor and a body temperature sensor are installed on each bushing. An oil inlet temperature sensor is installed on the 1#, 3#, 5#, and 7# test bushings.

[0068] Install these two types of test bushings in accordance with the "Thrust Bearing Installation Standard". After passing the acceptance inspection, conduct the test. Control the oil inlet temperature to about 40 °C, start the test machine under the low-speed and heavy-load working conditions of the gearbox, set the rotational speed to 1.88 m / s, apply specific pressures of 2.28 MPa, 3.42 MPa, 4.56 MPa, and 5.76 MPa respectively. After each stage has operated stably for 1 hour, record the subsequent parameters and perform numerical analysis on the test results as shown in Figures 7 and 8.

[0069] A typical elastic metal-plastic test bearing has a constant torque during operation, the temperature difference of the inner ring body complies with the current standard, and according to the mathematical analysis in Figure 7, each inner ring is in a good operating state under various specific pressure conditions and the force received is stable. During the change process from 2.28 MPa to 4.56 MPa, MT min becomes 3.6 °C, 4.1 °C and 4.7 °C respectively. When it reaches 5.76 MPa, MT min = MT 1 = MT 6 = 5.7, and the force-receiving ratio of the No. 6 test inner ring is 0.82, indicating that the data is stable and in a green operating state according to the mathematical analysis.

[0070] For the elastic metal-plastic test bearing with the high-pressure oil hole opening, the torque and output fluctuate when it reaches 5.76 MPa, the temperature difference of the main body is small during the whole operation process, and it is good according to the current bearing operation standard. However, as shown in Figure 8 and according to the analysis of the mathematical model, the force received by the No. 6 test inner ring is small. During the operation from 2.28 MPa to 4.56 MPa, MT 6 becomes 0.7 °C, 0.8 °C and 0.9 °C respectively, and there is MT 6 < 1 °C. When it reaches 5.76 MPa, the torque changes, and MT 極限 = MT 6 = 0.7 °C < 1 °C. The force-receiving ratio of this inner ring is 0.45, indicating an abnormality according to the mathematical analysis, and showing that the No. 6 test inner ring is always in the red warning state of poor boundary lubrication. This is mainly because the high-pressure oil hole destroys the formation of the lubricating oil film.

[0071] Interpretation of terms in this embodiment: 1. Force-receiving temperature: Also called "oil film force-receiving temperature" or "single inner ring force-receiving temperature", it refers to the difference between the oil film temperature of a single inner ring and the average oil inlet temperature (or oil groove temperature) of the inner ring. (Note: This term is a newly created term)

[0072] 2. Average force-receiving temperature: Also called "average bearing force-receiving temperature", it refers to the average force-receiving temperature of a set of bearings. (Note: This term is a newly created term)

[0073] 3. Single Sleeve Stress Ratio: It refers to the ratio of the stress temperature of a single sleeve to the average stress temperature of a set of sleeves, and also refers to the ratio of the stress ratio pressure of a single sleeve to the average stress ratio pressure of the sleeves. (Note: This term is a coined term)

[0074] 4. Sleeve Stress Ratio Pressure: It refers to the magnitude of the stress on each sleeve, expressed in specific pressure (MPa), load (KN), or mass (kg). (Note: This term is a coined term)

[0075] 5. Average Stress Ratio Pressure: It refers to the average load force of a set of sleeves, expressed in specific pressure (MPa), load (KN), or mass (kg). (Note: This term is a coined term)

[0076] 6. Oil Filling Temperature: It refers to the lubricating oil temperature at the oil filling end of the sleeve.

[0077] 7. MT Value: It refers to the difference between the oil film temperature and the body temperature of a single sleeve. (Note: This term is a coined term)

[0078] 8. MT 極限 Value: It refers to the MT min value when the frictional torque fluctuates. (Note: This term is a coined term)

[0079] 9. Red Operating Standard: It refers to the situation where the frictional torque fluctuates, or the stress state curves of two or more thrust sleeves change downward under high-speed and high-load conditions, or MT 極限 occurs under low-speed and high-load conditions. (Note: This term is a coined term)

[0080] 10. Yellow Operating Standard: It refers to the situation where the stress state curve of a single thrust sleeve changes downward. (Note: New interpretation)

[0081] 11. Green Operating Standard: It refers to the tendency that the stress state curve of the thrust sleeve is stable. (Note: New interpretation)

[0082] Finally, the following should be explained. Each of the above embodiments is merely for explaining the technical means of the present invention and does not limit it. Although the present invention has been described in detail with reference to each of the above embodiments, it is also possible to modify the technical means described in each of the above embodiments or perform an equivalent replacement of some or all of the technical features thereof. It is obvious to those skilled in the art that by these modifications and replacements, the essence of the corresponding technical means does not deviate from the scope of the technical means of each embodiment of the present invention.

[0083] (Appendix) (Appendix 1) Step 1: Install an oil filling temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor, and a body temperature sensor on the thrust collar to obtain real-time data on the oil filling temperature or oil groove temperature, oil film temperature, and body temperature of the thrust collar during the operation of the equipment set. Step 2: Calculate the average oil filling temperature value, oil film stress temperature value, average bearing stress temperature value, and single collar stress ratio value of the bearing based on the oil filling temperature and oil film temperature of each collar during the operation of the equipment set, and calculate the difference value MT between the oil film temperature and the body temperature based on the oil film temperature and the body temperature of a single collar. Step 3: Calculate the average stress ratio pressure of the bearing based on the load ratio pressure during the operation of the equipment set. Step 4: Obtain the stress ratio pressure of each single collar based on the average stress ratio pressure of the bearing and the single collar stress ratio value. Step 5: Establish the bearing operation standard and mathematical model of the equipment set based on various stress distribution states and MT values of the collars over the product life under the working conditions of the bearing, monitor the operating state of the thrust bearing in real time based on the model, and automatically diagnose and analyze the operating state of the equipment set. A calculation method for the operating state of a thrust bearing based on the stress and temperature of the oil film, characterized by including the above.

[0084] (Appendix 2) The following formula

Number

Number

[0085] (Appendix 3) The following formula [Number] (where T s,x represents the single roller force temperature of the thrust bearing with number x in °C, T o,x represents the single roller oil film temperature of the thrust bearing with number x in °C, [Number] represents the average oil filling temperature of the bearing in °C, x is the number of the thrust rollers of the thrust bearing, for example, 1, 2, 3, ···, n) to calculate the oil film force temperature value, which is the calculation method described in Appendix 1.

[0086] (Appendix 4) The following formula [Number] (where [Number] represents the average bearing force temperature in °C, T s,x represents the single roller force temperature of number x in °C, n is the number of thrust rollers in the bearing, x is the number of the thrust roller, for example, 1, 2, 3, ···, n. ) to calculate the average roller force temperature of the bearing, which is the calculation method described in Appendix 3.

[0087] (Appendix 5) The following formula

Number

Number

[0088] (Appendix 6) The following formula

Number

Number

[0089] (Appendix 7) The following formula MT x =T o,x -T p,x MT 極限 =MT min (Here, MT x represents the difference in °C between the oil film temperature and the body temperature of the thrust cage of number x, T o,x represents the oil film temperature in °C of the thrust cage of number x, T p,xrepresents the body temperature in °C of the thrust bearing with number x, where x is the number of the thrust bearing, for example, 1, 2, 3, ···, n, and MT min represents the minimum MT value in °C in this case, and MT 極限 represents MT when the frictional torque changes min is used to calculate the difference value MT between the oil film temperature and the body temperature), which is characterized by the calculation method described in Supplementary Note 6.

[0090] (Supplementary Note 8) The bearing operation has three-level standards of red, yellow, and green classified according to the force-receiving state ratio of a single bearing, the standard change ratio value, and the MT value. Regarding the three-level standards of red, yellow, and green for bearing operation, based on establishing a mathematical model by simulating actual and extreme working conditions on a simulation test bench, whether the frictional torque fluctuates, or whether the force-receiving state curves of two or more thrust bearings change downward under high-speed and high-load conditions, MT 極限 occurring under low-speed and high-load conditions is defined as the red operation standard, the downward change of the force-receiving state curve of a single thrust bearing is defined as the yellow operation standard, and the tendency of the force-receiving state curve of the thrust bearing to be stable is defined as the green operation standard, which is characterized by the calculation method described in Supplementary Note 7.

[0091] (Supplementary Note 9) A data collection device equipped with an oil inlet temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor, and a body temperature sensor having a signal collection module, an upper-level operation control machine, and a data display software interface, which are attached to the thrust bearing, in order to obtain real-time data of the oil inlet temperature and / or the oil groove temperature, the oil film temperature, and the body temperature of each bearing during the operation of the equipment set. Based on the collected data, calculate the average oil inlet temperature value, the oil film force-receiving temperature value, the average bearing force-receiving temperature value, and the single-bearing force-receiving ratio value of each bearing, calculate the difference value MT between the oil film temperature and the body temperature based on the oil film temperature and the body temperature of the single bearing, calculate the average force-receiving ratio pressure of the bearing according to the load ratio pressure during the operation of the equipment set, and obtain the force-receiving ratio pressure of each single bearing respectively based on the average force-receiving ratio pressure of the bearing and the single-bearing force-receiving ratio value, a data calculation device. A data analysis device that models based on each calculated numerical value, automatically diagnoses and analyzes the operating state of the equipment set according to preset standards, Specifically, the preset standard is a dynamic operating standard established by comparing the force-bearing state of the bearing according to the current mounting standard of the bearing. The bearing operation has a three-level standard of red, yellow, and green divided according to the force-bearing state ratio of a single row of rollers, the standard change ratio value, and the MT value. For the three-level standard of red, yellow, and green of the bearing operation, whether the frictional torque fluctuates based on the establishment of a mathematical model by simulating the actual and extreme working conditions on a simulation test bench, or whether the force-bearing state curves of two or more thrust rollers change downward under high-speed and high-load conditions, or MT 極限 Occurs under low-speed and high-load conditions is regarded as the red operating standard, the change of the force-bearing state curve of a single thrust roller downward is regarded as the yellow operating standard, and the tendency of the force-bearing state curve of the thrust roller to be stable is regarded as the green operating standard. A calculation system for the operating state of a thrust bearing based on the force and temperature of an oil film, characterized by the above.

[0092] (Appendix 10) The data collection device further includes a weighing sensor, calculates the force-bearing temperature through the weighing sensor, verifies the bearing force-bearing operating state. Since the materials of the thrust rollers used in various equipment sets are different, or the new and old of the equipment sets are different, or the force-bearing differences when installing the thrust rollers are different, a dedicated bearing operating standard can be established. The thrust bearing operation data of the equipment set is fused through the platform and converted into a logical calculation formula according to the standard, and a bearing force analysis model is established as a basic condition for constructing a platform for the maintenance and management of sliding bearings. A calculation system according to Appendix 9, characterized by the above.

Claims

1. Step 1: Install an oil filling temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor, and a body temperature sensor on the thrust bearing to obtain real-time data on the oil filling temperature or oil groove temperature, oil film temperature, and body temperature of the thrust bearing during the operation of the equipment set; Step 2: Calculate the average oil filling temperature value, oil film force temperature value, average bearing force temperature value, and single bearing force ratio value of the bearing based on the oil filling temperature and oil film temperature of each bearing during the operation of the equipment set, and calculate the MT value, which is the difference between the oil film temperature and the body temperature, based on the oil film temperature and the body temperature of a single bearing; Step 3: Calculate the average bearing force ratio pressure of the bearing based on the load ratio pressure during the operation of the equipment set; Step 4: Obtain the bearing force ratio pressure of each single bearing based on the average bearing force ratio pressure and the single bearing force ratio value of the bearing; Step 5: Establish a mathematical model with the bearing force ratio pressure and the MT value of each single bearing over the product life under the operating conditions of the bearing, where the input of the equipment set is the average bearing force ratio pressure or time or temperature and the output is the bearing force ratio pressure. Monitor the operating state of the thrust bearing in real time based on this model, and automatically diagnose and analyze the operating state of the equipment set. A method for calculating the operating state of a thrust bearing based on the force and temperature of the oil film, characterized by the above.

2. The following formula 【Number 1】 (where 【Number 2】 represents the average oil filling temperature of the thrust bearing in °C, and T ｉ，ａ , T ｉ，ｂ , T ｉ，ｃ , ···, T ｉ，ｊ represent the oil filling temperatures of the thrust rollers with oil filling temperature sensors attached in °C, a, b, c, ···, j are the numbers of the thrust rollers with oil filling temperature sensors attached, m represents the number of oil filling temperature sensors, and when no oil filling temperature sensor is installed, the average oil filling temperature value is replaced with the oil tank temperature value), calculating the average oil filling temperature value of the bearing, the calculation method according to claim 1, characterized in that.

3. The following formula 【Number 3】 (Here, T ｓ，ｘ represents the single-cage bearing force temperature (°C) of the thrust bearing with number x, and T ｏ，ｘ represents the single-cage oil film temperature (°C) of the thrust bearing with number x. 【Number 4】 represents the average oil filling temperature of the bearing in °C, and x is the number of the thrust bearing of the thrust bearing, for example, 1, 2, 3,..., n) is used to calculate the oil film force temperature value. The calculation method according to Claim 1, characterized by this.

4. The following formula 【Number 5】 (where 【Number 6】 represents the average bearing force temperature in °C, and T ｓ，ｘ represents the single-roller force temperature in °C for roller number x, n is the number of thrust rollers in the bearing, x is the number of the thrust roller, for example, 1, 2, 3,..., n.) calculating the average roller force temperature of the bearing, the calculation method according to claim 3, characterized in that.

5. The following formula 【Number 7】 (where t ｓ，ｘ represents the single-encapsulation force ratio of number x, and T ｓ，ｘ represents the single-encapsulation force temperature °C of number x, 【Number 8】 represents the average bearing force temperature in °C, and x is the number of the thrust bearing, for example, 1, 2, 3,..., n) is used to calculate the single bearing force ratio. The calculation method according to Claim 4, characterized by this.

6. The following formula 【Number 9】 (Here, P ｘ represents the nested force-receiving ratio pressure MPa of number x, 【Number 10】 represents the average force-bearing specific pressure MPa of the bearing bearing the load, t ｓ，ｘ represents the nested force-bearing ratio of number x, where x is the number of the thrust roller, for example, 1, 2, 3,..., n), and calculates the nested force-bearing specific pressure value. The calculation method according to claim 5, characterized in that.

7. The following formula MT ｘ = T ｏ，ｘ - T ｐ，ｘ MT 極限 = MT ｍｉｎ (Here, MT ｘ represents the difference in °C between the oil film temperature and the body temperature of the thrust bearing with number x, T ｏ，ｘ represents the oil film temperature °C of the thrust bearing with number x, T ｐ，ｘ represents the body temperature °C of the thrust bearing with number x, x is the number of the thrust bearing, for example, 1, 2, 3,..., n, MT ｍｉｎ represents the minimum MT value °C in this case, MT 極限 represents MT when the frictional torque changes ｍｉｎ (is represented)) to calculate the difference value MT between the oil film temperature and the body temperature, the calculation method according to claim 6, characterized in that.

8. The bearing operation has a three - level standard of red, yellow, and green divided according to the single - row load - bearing state ratio, standard change ratio value, and MT value. Regarding the three - level standard of red, yellow, and green for bearing operation, based on establishing a mathematical model by simulating actual and extreme working conditions on a simulation test bench, whether the frictional torque fluctuates, whether the load - bearing state curves of two or more thrust rollers change downward under high - speed and high - load conditions, MT 極限 occurring under low - speed and high - load conditions is taken as the red operation standard, the change downward of the load - bearing state curve of a single thrust roller is taken as the yellow operation standard, and the tendency for the load - bearing state curve of the thrust roller to be stable is taken as the green operation standard. The calculation method according to claim 7, characterized by the above.

9. A data collection device comprising an oil filling temperature sensor and / or an oil groove temperature sensor, an oil film temperature sensor, and a body temperature sensor with a signal collection module, an upper operation control machine, and a data display software interface, which are attached to the thrust bearing to obtain real-time data on the oil filling temperature and / or oil groove temperature, oil film temperature, and body temperature of each bearing during the operation of the equipment set respectively; Based on the collected data, calculate the average oil-filled temperature value, oil film stress temperature value, average bearing stress temperature value, and single bearing stress ratio value of each nested bearing. Calculate the MT value, which is the difference between the oil film temperature and the body temperature, based on the oil film temperature and the body temperature of the single bearing. Calculate the average bearing stress ratio pressure based on the load ratio pressure during the operation of the equipment set. Obtain the stress ratio pressure of each single bearing based on the average bearing stress ratio pressure and the single bearing stress ratio value. A data calculation device, Based on the calculated numerical values, model them into a mathematical model where the input is the average stress ratio pressure or time or temperature and the output is the stress ratio pressure, and automatically diagnose and analyze the operating state of the equipment set according to preset standards. A data analysis device, Specifically, the preset standard is a dynamic operation standard established by comparing the force-bearing state of the bearing with the current installation standard of the bearing. The bearing operation has a three-level standard of red, yellow, and green divided according to the force-bearing state ratio of a single cage, the standard change ratio value, and the MT value. Regarding the three-level standard of red, yellow, and green for bearing operation, whether the frictional torque fluctuates based on the establishment of the mathematical model by simulating the actual and extreme working conditions on a simulation test bench, whether the force-bearing state curves of two or more thrust cages change downward under high-speed and high-load conditions, or whether MT 極限 occurs under low-speed and high-load conditions is regarded as the red operation standard, the change of the force-bearing state curve of a single thrust cage downward is regarded as the yellow operation standard, and the tendency of the force-bearing state curve of the thrust cage to be stable is regarded as the green operation standard. A calculation system for the operating state of a thrust bearing based on the force and temperature of an oil film, characterized by the above.

10. The data collection device further includes a weighing sensor. Calculate the stress temperature through the weighing sensor, verify the bearing stress operating state. Since the materials of the thrust bearings used in various equipment sets are different, or the new and old of the equipment sets are different, or the stress differences during the installation of the thrust bearings are different, a dedicated bearing operation standard can be established. Through the platform, fuse the thrust bearing operation data of the equipment set and convert it into a logical calculation formula according to the standard. Establish a bearing stress analysis model as the basic condition for constructing a platform for the maintenance and management of sliding bearings. The calculation system according to claim 9, characterized in that.

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