A double measuring point error compensation correction method for lubricating oil of mine reducer

Abstract

The application discloses a double-measuring-point error compensation correction method for lubricating oil of a mine reducer, and comprises the following steps: S1, modeling an internal cavity of the mine reducer, and dividing the internal cavity of the mine reducer into a lubricating oil volume located at the bottom and an air chamber volume located above; S2, arranging a first sensor for detecting lubricating oil pressure and current oil temperature of the lubricating oil at the bottom of the internal cavity of the mine reducer, and arranging a second sensor for detecting air chamber pressure at the top of the internal cavity of the mine reducer; S3, calculating actual liquid level pressure of the lubricating oil according to the lubricating oil pressure detected by the first sensor and the air chamber pressure detected by the second sensor; S4, establishing an oil temperature and density relationship function according to the change relationship between the current oil temperature of the lubricating oil and the density; and S5, calculating the actual oil level height after compensation and correction according to the actual liquid level pressure of the lubricating oil and the oil temperature and density relationship function, and combining a pressure formula.

Description

Technical Field

[0001] This invention relates to the field of oil level monitoring, and in particular to a method for compensating and correcting errors in the lubricating oil of a mining reducer using dual measuring points. Background Technology

[0002] During operation in coal mines, as the temperature rises, the internal pressure of the reducer gradually increases due to poor venting, which in turn affects the pressure of the internal lubricating oil. Consequently, the pressure measured at the bottom of the oil level fluctuates due to changes in the pressure within the reducer's internal air chamber, leading to measurement results that deviate significantly from the actual situation. Currently, no data calibration is performed on the equipment during operation, causing abnormal fluctuations in oil level monitoring data as the equipment runs. This data fails to reflect the actual working conditions and is merely superficial, lacking practical value. Improvement is necessary. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a simple and effective method for compensating for errors in the dual-point measurement of lubricating oil in mining reducers, which improves the accuracy of oil level monitoring in mining reducers.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A method for compensating and correcting errors in lubricating oil at two measuring points in mining reducers includes the following steps: S1. Model the internal cavity of the mining reducer, dividing the internal cavity into the lubricating oil volume located at the bottom. and the volume of the air chamber located above. ; S2. A device for detecting lubricating oil pressure is installed at the bottom of the internal cavity of the mining reducer. and the current oil temperature of the lubricating oil The first sensor; installed at the top of the internal cavity of the mining reducer to detect the air chamber pressure. The second sensor; S3. Based on the lubricating oil pressure detected by the first sensor... The pressure of the air chamber detected by the second sensor The actual level pressure of the lubricating oil is calculated; S4. Based on the current oil temperature of the lubricating oil Establish the oil temperature-density relationship function by studying the density variation. S5. Based on the actual level pressure and oil temperature-density relationship function of the lubricating oil, and combined with the pressure formula, calculate the compensated and corrected actual oil level height.

[0005] Furthermore, in step S1, the calculation formula for modeling the internal cavity of the mining reducer is as follows: ; in, This refers to the internal cavity volume of the mining reducer.

[0006] Furthermore, in step S3, the formula for calculating the actual lubricating oil level pressure is: ; in, This represents the actual liquid level and pressure of the lubricating oil.

[0007] Furthermore, in step S4, the formula for calculating the oil temperature-density relationship function is: ; in, For the lubricating oil at the current oil temperature The density below, This refers to the standard density of lubricating oil at 15°C. This refers to the current temperature of the lubricating oil. This is the coefficient of variation of lubricating oil density with temperature.

[0008] Furthermore, in step S5, the pressure formula is: ; in, It is the acceleration due to gravity. For the lubricating oil at the current oil temperature The actual oil level.

[0009] Furthermore, in step S5, the formula for calculating the actual oil level is: .

[0010] Compared with the prior art, the advantages and positive effects of this invention are: This invention is based on a simplified internal cavity model of a mining reducer. It uses mathematical model formulas to calculate and compensate for the lubricating oil level in the reducer, ultimately obtaining the actual lubricating oil level under operating conditions. Through a dual-measuring-point error compensation correction method, it achieves precise correction and compensation of the lubricating oil level, solving the problem of abnormal oil level changes caused by temperature during the use of the mining reducer. This effectively ensures the accuracy, reliability, and practicality of the lubricating oil level monitoring data, demonstrating the practical value of lubricating oil level monitoring in mining reducers and possessing broad market prospects. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a simplified diagram of the equivalent model of the internal cavity of a mining speed reducer. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of the present invention.

[0014] This invention discloses a dual-point error compensation and correction method for lubricating oil in mining reducers, which can be used to compensate for and correct abnormal data of lubricating oil level, ensuring the authenticity and reliability of oil level monitoring data.

[0015] I. Simplified model of the cavity of a mining reducer like Figure 1 As shown, this is a schematic diagram of the equivalent model of the internal cavity of a mining reducer. In the diagram, lubricating oil and air together fill the entire internal cavity space of the reducer. The volume occupied by the gear shaft, gears, and other related components inside the reducer is ignored, and the volume occupied by the lubricating oil is set to be... The volume of the air chamber is Sensor 1 and Sensor 2 are installed at the bottom and top of the internal cavity, respectively, to monitor the lubricating oil temperature, lubricating oil pressure, and air chamber pressure.

[0016] II. Algorithm Principle During operation, the temperature of the mining reducer gradually rises, causing the lubricating oil temperature to passively increase. This increased lubricating oil temperature leads to a decrease in lubricating oil density. Under the same mass conditions, the density and volume of a liquid are inversely proportional, resulting in an increase in the volume of the lubricating oil. This increased volume compresses the air in the air chamber, creating internal pressure. This internal pressure is transmitted to the lubricating oil through the contact surface between the air chamber and the lubricating oil, causing an increase in lubricating oil pressure. At this point, the lubricating oil pressure value measured by sensor 1 is superimposed with the internal pressure generated by the compression of the air chamber, leading to inaccurate measurement results. Therefore, sensor 2 can measure the pressure of the air chamber, and a correction algorithm can eliminate the excess internal pressure, thus obtaining an accurate lubricating oil level.

[0017] III. Compensation and Correction Process 1. Model the internal cavity of the mining reducer; the formula is as follows: (1) in: Volume of the chamber of a mining reducer, unit: L.

[0018] Volume of lubricating oil for mining reducers, unit: L.

[0019] Volume of the air chamber of a mining reducer, unit: L.

[0020] 2. Acquire monitoring data from sensor 1 and sensor 2, and define them: : Lubricating oil temperature measured by sensor 1, unit: ℃.

[0021] : Lubricating oil pressure measured by sensor 1, unit: Pa.

[0022] : Pressure in the air chamber measured by sensor 2, unit: Pa.

[0023] 3. The pressure difference can be obtained from the pressure of sensor 1 and sensor 2, and the formula is as follows: (2) in: Pressure generated by the actual level of lubricating oil, unit: Pa.

[0024] 4. Based on the relationship between oil temperature and density, establish the oil temperature-density relationship function, the formula of which is: (3) in: : Density of lubricating oil at oil temperature T, unit: kg / m³.

[0025] : Density of lubricating oil at 15℃ (standard density), unit: kg / m³.

[0026] Current temperature of lubricating oil, unit: °C.

[0027] : Coefficient of change of lubricating oil density with temperature, value: -0.00075 / ℃.

[0028] 5. The pressure formula is: (4) in: : Gravitational acceleration, unit: m / s².

[0029] The height of lubricating oil at oil temperature T, in meters.

[0030] According to the pressure formula, by substituting formulas (2) and (3) into the pressure formula (4), the actual oil level after compensation can be calculated. The calculation formula is as follows: ; This gives us the actual height of the lubricating oil level, thus completing the compensation and correction for the calculation error of the lubricating oil.

[0031] This invention is based on a simplified internal cavity model of a mining reducer. It uses mathematical model formulas to calculate and compensate for the lubricating oil level in the reducer, ultimately obtaining the actual lubricating oil level under operating conditions. Through a dual-measuring-point error compensation correction method, it achieves precise correction and compensation of the lubricating oil level, solving the problem of abnormal oil level changes caused by temperature during the use of the mining reducer. This effectively ensures the accuracy, reliability, and practicality of the lubricating oil level monitoring data, demonstrating the practical value of lubricating oil level monitoring in mining reducers and possessing broad market prospects.

Claims

1. A method for compensating and correcting errors in lubricating oil at dual measuring points in mining reducers, characterized in that: Includes the following steps: S1. Model the internal cavity of the mining reducer, dividing the internal cavity into the lubricating oil volume located at the bottom. and the volume of the air chamber located above. ; S2. A device for detecting lubricating oil pressure is installed at the bottom of the internal cavity of the mining reducer. and the current oil temperature of the lubricating oil The first sensor; installed at the top of the internal cavity of the mining reducer to detect the air chamber pressure. The second sensor; S3. Based on the lubricating oil pressure detected by the first sensor... The air chamber pressure detected by the second sensor The actual level pressure of the lubricating oil is calculated; S4. Based on the current oil temperature of the lubricating oil Establish a function relating oil temperature and density to changes in density; S5. Based on the actual level pressure and oil temperature-density relationship function of the lubricating oil, and combined with the pressure formula, calculate the compensated and corrected actual oil level height.

2. The dual-measuring-point error compensation and correction method for lubricating oil in mining reducers as described in claim 1, characterized in that: In step S1, the calculation formula for modeling the internal cavity of the mining reducer is as follows: ； in, This refers to the internal cavity volume of the mining reducer.

3. The dual-measuring-point error compensation and correction method for lubricating oil in mining reducers as described in claim 2, characterized in that: In step S3, the formula for calculating the actual lubricating oil level pressure is: ； in, This represents the actual liquid level and pressure of the lubricating oil.

4. The dual-measuring-point error compensation and correction method for lubricating oil in mining reducers as described in claim 3, characterized in that: In step S4, the formula for calculating the oil temperature-density relationship function is as follows: ； in, For the lubricating oil at the current oil temperature The density below, This refers to the standard density of lubricating oil at 15°C. This refers to the current temperature of the lubricating oil. This is the coefficient of variation of lubricating oil density with temperature.

5. The dual-measuring-point error compensation and correction method for lubricating oil in mining reducers as described in claim 4, characterized in that: In step S5, the pressure formula is: ； in, It is the acceleration due to gravity. For the lubricating oil at the current oil temperature The actual oil level.

6. The dual-measuring-point error compensation and correction method for lubricating oil in mining reducers as described in claim 5, characterized in that: In step S5, the formula for calculating the actual oil level is: 。

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