A torque measurement method suitable for transmission equipment

Abstract

The present invention belongs to a measurement method, and specifically relates to a torque measurement method suitable for use in a transmission device. A torque measurement method suitable for use in a transmission device, which includes the following steps: a first step, system installation; a second step, system debugging; a third step, real-time measurement; and a fourth step, calculation and output of the result. The remarkable effect of the present invention is that the strain data curve graph measured by the present invention conforms to the movement law of the equipment, and the maximum value is close to the estimated value. Finally, all the measured data are sorted into test records, and the test report of the data record has been approved by the design institute. The measured data can be combined with the various parameters of the flip coupling to study the actual working tolerance and service life of the flip shaft, and further verify the reliability of the transmission structure design.

Description

Technical Field

[0001] The invention belongs to a measurement method, and in particular relates to a torque measurement method suitable for transmission equipment. Background Art

[0002] A certain tipping device has very strict requirements on the smoothness of transmission operation, the accuracy of the centering and positioning of the large hanging basket, and the reliability of clamping, flipping, and oscillating actions. In order to verify the reliability of the transmission structure design of the equipment, it is necessary to measure the torque borne by the flip coupling under different operating conditions (flipping, clamping, oscillation). It is understood that the relevant industry has some experience in measuring torque, and special equipment includes dynamometers, torque sensors, pressure sensors, etc. However, due to the complexity of the torque borne by the coupling under actual working conditions, and the installation space of the sensor, the actual working conditions of the equipment and the economy must be considered, various special equipment are not applicable. After analyzing the structural form and stress process of the equipment, the maximum dynamic strain borne by the object under test is estimated, combined with its material (stainless steel material), and the force is torsional. Therefore, it is necessary to study a suitable torque measurement method. Summary of the invention

[0003] The present invention aims at solving the defects of the prior art and provides a torque measurement method suitable for transmission equipment.

[0004] The present invention is implemented as follows: a torque measurement method suitable for transmission equipment, which includes the following steps:

[0005] The first step is system installation;

[0006] The second step is system debugging;

[0007] The third step is real-time measurement;

[0008] Step 4: Calculate and output the results.

[0009] As described above, a torque measurement method suitable for a transmission device, wherein the first step includes the following contents:

[0010] Specific positions are marked. The specific positions are the places where the universal coupling of the turning shaft is subjected to the strongest force during the turning and oscillation of the pouring barrel.

[0011] As described above, a torque measurement method suitable for transmission equipment is described, wherein the first step also includes the following contents: grinding and cleaning a specific position, requiring the surface to be smooth and clean, with no foreign matter visible to the naked eye as the standard, pasting a strain gauge, and applying heavy pressure for 4 hours to cure.

[0012] As described above, a torque measurement method suitable for transmission equipment, wherein the first step also includes the following content: after the strain gauge is installed, the strain gauge's own wire and the three-core shielded cable for measurement are welded together using terminal blocks, and finally the prefabricated connector at the other end of the measuring cable is connected to the four channel connectors of the data acquisition device, and finally the computer and the data acquisition device are connected with a network cable to form a torque measurement system.

[0013] As described above, a torque measurement method suitable for transmission equipment, wherein the second step includes the following contents: after the installation of various parts of the measurement system is completed, the data acquisition device is started to debug the system, the installed data acquisition and analysis software is opened, the variable characteristics of each channel are set and saved, the real-time recording value of the measurement channel is called out, and the waveform graph and data table mode are selected for output display. During debugging, the pressure on the strain gauge is gradually increased to observe whether the data change of the channel is consistent with the pressure trend. If it is consistent, the subsequent steps are executed. If it is inconsistent, the result is corrected until the observed data is consistent with the actual data.

[0014] As described above, a torque measurement method suitable for transmission equipment is described, wherein the third step includes the following contents: starting a certain tipping device control system, operating the device with load to perform flipping-oscillation-resetting through an operating table, and performing real-time measurement for a period of time in each action mode. The instrument uploads data once a second, and the measurement record of each action segment needs to be saved separately.

[0015] As described above, a torque measurement method suitable for transmission equipment, wherein the third step also includes the following content, and the period of time refers to 5-10 minutes.

[0016] As described above, a torque measurement method suitable for transmission equipment, wherein the third step also includes the following content: after all action measurements are completed, the measured data are extracted and integrated to calculate the strain γ.

[0017] The torque measurement method applicable to a transmission device as described above, wherein the fourth step includes the following contents:

[0018] a) Calculate the torque on the coupling by substituting it into formula 1;

[0019] Formula 1: τ=G×γ

[0020] Among them: τ is torque, G is shear modulus, and γ is shear strain. After investigation: the coupling material is 304 stainless steel, and the shear modulus of G is 79.38GPa.

[0021] b) After calculating the τ torque value, calculate the torque M that the universal coupling bears under this working condition according to Formula 2;

[0022] Formula 2: M = τ × W

[0023] c) Where: W is the torsional section coefficient, W = 0.1964 × (D4-d4) / D

[0024] D is d is This dimension is found according to the coupling drawing.

[0025] Formula 3: M = G × γ × W ≈ 79.38 × γ × 1.55 × 105, substitute the minimum, maximum and effective values ​​of the measured strain value into Formula 3 to calculate the torque, the γ strain value unit is μm / m, which needs to be converted to m during calculation, and the pressure unit is converted to Pa.

[0026] The significant effect of the present invention is that the strain data curve graph measured by the invention conforms to the movement law of the equipment, and the maximum value is close to the estimated value. Finally, all the measured data are sorted into test records, and the test report of the data record has been approved by the design institute. The measured data can be combined with various parameters of the flip coupling to study the actual working tolerance and working life of the flip shaft, and further verify the reliability of the transmission structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Design a flow chart for the torque measurement system. DETAILED DESCRIPTION

[0028] The present invention is further described below.

[0029] The first step is to analyze the most effective monitoring positions and mark them according to the equipment drawings and actual working conditions. These positions are the places where the universal coupling of the flip axis is subjected to the strongest force during the flipping and oscillation of the dump barrel. These positions are polished and cleaned, and the surface treatment is required to be smooth and clean. The strain gauge is pasted with special glue and solidified by heavy pressure for 4 hours. After the strain gauge is installed, the strain gauge's own wires and the three-core shielded cable for measurement are welded together with the terminal block, and finally the prefabricated connector at the other end of the measuring cable is connected to the four channel connectors of the data collector. Finally, the computer and the data collector are connected with a network cable to form a torque measurement system.

[0030] The second step is to start the data acquisition device for system debugging after all parts of the measurement system are installed, open the installed data acquisition and analysis software, set and save the variable characteristics of each channel, call out the real-time recorded values ​​of the measurement channel, and select the waveform and data table mode for output display. During debugging, gradually increase the pressure on the pasted strain gauge to observe whether the data changes of the channel are consistent with the pressure trend.

[0031] The third step is to start a certain tipping device control system, and use the operating console to operate the equipment to flip-oscillate-reset with load. Each action mode is measured in real time for a period of time. The instrument uploads data once a second, and the measurement records of each action segment need to be saved separately. After all the action measurements are completed, the measured data is extracted and integrated, and the most effective sets of data that can truly reflect the actual working conditions are selected. The software is used for data analysis, and finally the maximum, minimum and effective values ​​of each channel of each working condition are extracted according to the needs. It is used for the next step of torque calculation. The processed data value is the strain γ generated by the universal coupling under this working condition; the step of calculating the strain γ can be achieved by existing technology.

[0032] a) Calculate the torque on the coupling by substituting it into formula 1;

[0033] Formula 1: τ=G×γ

[0034] Among them: τ is torque, G is shear modulus, and γ is shear strain. After investigation: the coupling material is 304 stainless steel, and the shear modulus of G is 79.38GPa.

[0035] d) After calculating the τ torque value, calculate the torque M that the universal coupling bears under this working condition according to Formula 2;

[0036] Formula 2: M = τ × W

[0037] e) Where: W is the torsional section coefficient, W = 0.1964 × (D4-d4) / D

[0038] D is d is (This dimension can be found from the coupling drawing)

[0039] f) Formula 3: M = G × γ × W ≈ 79.38 × γ × 1.55 × 105, the minimum, maximum and effective values ​​of the measured strain values ​​are respectively substituted into Formula 3 to calculate the torque. The unit of the γ strain value is μm / m, which needs to be converted to m during calculation, and the pressure unit is converted to Pa. Finally, the torque test measurement value of the flip coupling is sorted out.

Claims

1. A torque measurement method suitable for transmission equipment, characterized in that: The following steps are included: The first step is system installation; The second step is system debugging; The third step is real-time measurement; Step 4: Calculate and output the results; The first step includes the following: Mark the specific positions where the universal coupling of the tilting shaft is subjected to the strongest force during the tilting and oscillation of the dump barrel; The first step also includes the following: grinding and cleaning the specific position, requiring the surface to be smooth and clean, with no foreign matter visible to the naked eye as the standard, pasting the strain gauge, and applying heavy pressure for 4 hours to cure; The first step also includes the following contents: after the strain gauge is installed, the strain gauge wire and the three-core shielded cable for measurement are welded together with the terminal block, and finally the prefabricated connector at the other end of the measurement cable is connected to the four channel connectors of the data acquisition device, and finally the computer and the data acquisition device are connected with a network cable to form a torque measurement system; The second step includes the following contents: after the installation of each part of the measurement system is completed, the data acquisition device is started to debug the system, the installed data acquisition and analysis software is opened, the variable characteristics of each channel are set and saved, the real-time recorded value of the measurement channel is called out, and the waveform and data table modes are selected for output display. During debugging, the pressure on the strain gauge is gradually increased to observe whether the data change of the channel is consistent with the pressure trend. If it is consistent, the subsequent steps are executed. If it is not consistent, the results are corrected until the observed data is consistent with the actual data; The third step includes the following contents: starting a certain dumping device control system, operating the device with load to flip-oscillate-reset through the operating console, performing real-time measurement for a period of time in each action mode, the instrument uploads data once per second, and the measurement record of each action needs to be saved separately; The third step also includes the following contents, wherein the period of time refers to 5-10 minutes; The third step also includes the following contents: after all the action measurements are completed, the measured data are extracted and integrated to calculate the strain γ; The fourth step includes the following: a) Calculate the torque on the coupling by substituting it into formula 1; Formula 1: τ=G×γ Among them: τ is torque, G is shear modulus, γ is strain. After checking: the coupling material is 304 stainless steel, G shear modulus is 79.38GPa, b) After calculating the τ torque value, calculate the torque M that the universal coupling bears under the working condition according to Formula 2; Formula 2: M = τ × W c) Where: W is the torsional section coefficient, W = 0.1964 × (D*4-d*4) / D D is d is The dimensions are found according to the coupling drawing. Formula 3: M = G × γ × W ≈ 79.38 × γ × 1.55 × 105. Substitute the minimum, maximum and effective values ​​of the measured strain values ​​into Formula 3 to calculate the torque. The unit of γ strain value is μm / m, which needs to be converted to m during calculation. The pressure unit is converted to Pa.

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