Gear oil monitoring method and gear oil tank

Abstract

The invention belongs to the technical field of gear monitoring, and particularly relates to a gear oil monitoring method and a gear oil tank. The method comprises the steps that a receiving device arranged on one side of an oil storage cavity receives light waves on the opposite side, and the real-time state of gear oil is obtained through a gear oil monitoring algorithm according to the light waves received by the receiving device; an oil storage cavity for storing gear oil is formed through the oil storage tank; light ports are formed in the two opposite sides of the oil storage tank correspondingly and used for forming light waves transversely penetrating through the oil storage cavity. The light port is creatively formed in the oil storage tank, so that the real-time state of gear oil can be detected through light waves. When the gear oil is monitored, a gear oil loop does not need to be additionally arranged, the state of the gear oil in the oil storage tank can be directly monitored, and the risk of gear oil leakage is reduced. The technical problem that in the prior art, a gear oil monitoring device is tedious in arrangement is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of gear monitoring, and in particular relates to a gear oil monitoring method and a gear oil tank. Background Art

[0002] As a large-scale rotating machine, the performance of the main drive seal of the shield machine directly affects the tunneling efficiency of the shield machine. Currently, due to the lack of effective visualization methods, the working status of the main drive seal can be indirectly judged by real-time monitoring of the gear oil tank level and gear oil status changes.

[0003] In recent years, with the development of science and technology, relevant research on main drive seal detection has gradually emerged, mostly tuning fork liquid level switches or immersion liquid level sensors. However, the tuning fork liquid level switch cannot monitor the liquid level changes in real time, and can only issue an early warning when the liquid level reaches a preset position. If the liquid level in the gear oil tank increases or decreases rapidly, the tuning fork liquid level switch is difficult to monitor the instantaneous liquid level changes, which may easily cause serious consequences; and the immersion liquid level sensor is suitable for liquid level monitoring of large-size oil tanks, but has certain limitations for small gear oil tanks.

[0004] In terms of gear oil status monitoring, the Chinese invention patent application with application publication number CN116733486A and application publication number 2023.09.12 discloses a shield machine main drive oil monitoring device, system and method, the device includes a housing and an image acquisition element, an oil pump and a transparent tube arranged inside the housing, and the gear oil of the shield machine main drive circulates between the transparent tube and the gear oil cavity through the oil pump. The image information of the gear oil in the transparent tube is obtained by the image acquisition element, and the status information of the gear oil is obtained according to the image. However, the above technical solution can only monitor the physical state of the gear oil itself, and it is also impossible to realize real-time monitoring of parameters such as the liquid level in the gear oil tank. Therefore, it is impossible to realize comprehensive monitoring of the gear oil, which makes it have certain limitations in application. In addition, the device also needs to drive the gear oil to flow in the transparent tube through the oil pump. On the one hand, the use of the oil pump increases the cost and energy consumption of the detection device; on the other hand, since an additional loop needs to be added to the gear oil circuit, not only the layout is cumbersome, but also the risk of gear oil leakage is increased. Summary of the invention

[0005] The purpose of the present invention is to provide a gear oil monitoring method and a gear oil tank to solve the technical problem of complicated arrangement of the gear oil monitoring device in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a technical solution of a gear oil monitoring method: a gear oil monitoring method, the method comprising: receiving light waves on the opposite side by a receiving device arranged on one side of the oil storage chamber, and obtaining the real-time state of the gear oil by a gear oil monitoring algorithm according to the light waves received by the receiving device; An oil storage cavity for storing gear oil is formed by the oil storage tank; light ports are respectively provided on two opposite sides of the oil storage tank for forming a light wave that crosses the oil storage cavity.

[0007] The beneficial effect of the above technical solution is that the technical solution of the gear oil monitoring method of the present invention belongs to an improved invention. The present invention creatively sets an optical port on the oil storage tank so that the real-time state of the gear oil can be detected by light waves. When the present invention monitors the gear oil, there is no need to set up an additional gear oil circuit, and the state of the gear oil in the oil storage tank can be directly monitored, which reduces the risk of gear oil leakage. The present invention solves the technical problem of the cumbersome arrangement of the gear oil monitoring device in the prior art.

[0008] Furthermore, the projection of the light wave in the vertical direction covers at least the top and bottom of the oil storage tank from top to bottom, the gear oil monitoring algorithm includes a gear oil level detection algorithm; and the real-time status of the gear oil includes the gear oil level in the oil storage chamber.

[0009] Furthermore, the gear oil monitoring algorithm includes a gear oil transmittance detection algorithm; and the real-time status of the gear oil includes gear oil turbidity.

[0010] Furthermore, the gear oil monitoring algorithm includes a gear oil absorption spectrum detection algorithm; the real-time status of the gear oil includes at least one of the degree of degradation, water content and temperature.

[0011] The present invention also provides a technical solution for a gear oil tank: comprising an oil storage box and an oil storage cavity formed by its internal space, the oil storage cavity is used to store gear oil, and light ports are respectively opened on two opposite sides of the oil storage box to form a light wave that crosses the oil storage cavity.

[0012] The beneficial effect of the above technical solution is that the technical solution of a gear oil tank of the present invention belongs to an improved invention. The present invention creatively sets an optical port on the oil storage tank so that the real-time state of the gear oil can be detected by light waves. When the present invention monitors the gear oil, there is no need to set up an additional gear oil circuit, and the state of the gear oil in the oil storage tank can be directly monitored, which reduces the risk of gear oil leakage. The present invention solves the technical problem of the cumbersome arrangement of the gear oil monitoring device in the prior art.

[0013] Furthermore, the projection of the light wave in the vertical direction covers at least the top and the bottom of the oil storage tank from top to bottom.

[0014] Furthermore, it also includes a tank body, which is relatively provided with two side plates that divide the interior of the tank body into three parts, and the space enclosed by the two side plates and the side wall of the tank body constitutes the oil storage cavity.

[0015] Furthermore, the two side panels are both transparent side panels to form the light port.

[0016] Furthermore, it also includes a light source layer and a receiving layer, the light source layer is used to emit light waves, and the receiving layer is provided with a receiving device for receiving the light waves emitted by the light source layer; the space enclosed by the side wall of the tank body and one of the side panels constitutes the light source layer, and the space enclosed by the side wall of the tank body and the other side panel constitutes the receiving layer.

[0017] Furthermore, a light source board having the same size and shape as the side wall of the tank body is installed on the side wall of the tank body in the light source layer, and light waves are emitted through the light source board.

[0018] Furthermore, the oil storage cavity comprises an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively located at the top and the bottom of the oil storage tank and are arranged diagonally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front cross-sectional view of a gear oil tank in an embodiment of the gear oil tank of the present invention; Figure 2 It is a top view of the gear oil tank in the embodiment of the gear oil tank of the present invention.

[0020] Among them, 1. tank body; 2. receiving layer; 3. receiving device; 4. first pressure-bearing glass; 5. light wave; 6. oil storage layer; 7. oil inlet; 8. light source layer; 9. second pressure-bearing glass; 10. gear oil; 11. impurities; 12. oil outlet. DETAILED DESCRIPTION

[0021] In the prior art, when monitoring gear oil, it is necessary to use an oil pump to make the gear oil flow to a transparent tube arranged outside, collect gear oil information in the transparent tube, and reflect the status of all gear oils. This method of device layout is relatively cumbersome. The present invention creatively sets an optical port on the oil storage tank, so that the real-time status of the gear oil can be detected by light waves. When monitoring gear oil, the present invention does not need to set up an additional gear oil circuit, and can directly monitor the status of the gear oil in the oil storage tank, thereby reducing the risk of gear oil leakage. The present invention solves the technical problem of the cumbersome layout of the gear oil monitoring device in the prior art.

[0022] Gear oil tank embodiment: A gear oil tank, such as Figure 1As shown, the gear oil tank is a rectangular device with a black outer shell, including a tank body 1, the interior of which is divided into three layers of space by a first pressure-bearing glass 4 and a second pressure-bearing glass 9 (i.e., two transparent side panels) arranged opposite to each other, namely, a receiving layer 2, an oil storage layer 6 (i.e., an oil storage tank), and a light source layer 8. The oil storage layer 6 is used to store gear oil 10, which is mixed with impurities 11, which will affect the quality of the gear oil 10 and reduce its service life.

[0023] The light source layer 8 is used to emit light waves 5. In order to reduce the error caused by projection, a light source board consistent with the wall is embedded on the right wall of the tank body 1 to emit light waves 5 of different wavelengths. The light waves 5 are irradiated into the oil reservoir 6 through the second pressure-bearing glass 9. After the light waves 5 enter the oil reservoir 6, after passing through the gear oil 10, impurities 11 and air, there are differences in their transmittance and absorption spectrum, and there is also a significant difference in the color of the gear oil 10 and the air.

[0024] A receiving device 3 is provided in the receiving layer 2, and the receiving device 3 is used to receive the light wave 5 emitted by the light source layer 8. The light wave 5 emitted by the light source layer 8 passes through the oil storage layer 6 and is received by the receiving device 3 in the receiving layer 2. The receiving device 3 has the functions of image monitoring recognition and spectrum analysis. Through the preset gear oil level detection algorithm, gear oil transmittance detection algorithm and gear oil absorption spectrum detection algorithm, the received light wave information (specifically including the gear oil tank level image information and absorption spectrum) is analyzed, processed and recognized to obtain parameters such as the gear oil tank level percentage, gear oil turbidity, water content, deterioration and temperature in real time.

[0025] In this embodiment, the light port is formed by the first pressure-bearing glass 4 and the second pressure-bearing glass 9. Such a setting can receive more comprehensive light waves, making the gear oil monitoring more accurate. In other embodiments, only a part of the two side panels can be set as a transparent material and both penetrate the top and bottom of the oil storage cavity. In this case, the transparent material parts of the two side panels respectively constitute the light port. In this case, the arrangement of the light source and the receiving device of the light source layer must meet the following requirements: the light waves emitted by the light source layer can pass through the light port and be received by the receiving device.

[0026] In other embodiments, the material of the two transparent side panels is not limited to glass, and transparent side panels of other materials may also be selected as long as they can meet the normal operation of the gear oil tank.

[0027] In order to prevent the oil from flowing into and out of the oil reservoir 6 and causing the liquid level to fluctuate, and at the same time, to avoid the situation where the oil is not sufficiently fluid, causing local flow and overall stillness, the oil inlet 7 and the oil outlet 12 are designed at the edge of the oil reservoir 6 and arranged diagonally up and down, so that the oil can slowly flow into the oil reservoir 6 along the wall, reducing the oil fluctuation and allowing the oil to flow fully in the oil reservoir 6, so that the oil health can be accurately analyzed, such as Figure 2 shown.

[0028] Gear oil monitoring method embodiment: A gear oil monitoring method of this embodiment can be implemented based on the gear oil tank described in the above gear oil tank embodiment. A gear oil monitoring method: a receiving device disposed on one side of the oil storage chamber of the gear oil tank receives light wave information on the opposite side, and a gear oil monitoring algorithm is used to obtain the real-time status of the gear oil based on the light wave information received by the receiving device.

[0029] After performing format conversion, color screening, binarization, Gaussian noise filtering, element coordinate extraction, digital operations and other operations on the image data: ① The real-time gear oil level value and gear oil volume can be obtained to determine whether leakage or blockage occurs. ② The current oil turbidity can be obtained to determine whether the oil is mixed with impurities; By performing spectral analysis on the absorption spectrum, the current oil deterioration degree, water content and temperature can be obtained, the working condition of the oil can be judged, and timely oil filtering or oil change operations can be performed. At the same time, the device will use a red frame to select the liquid level area on the monitoring screen, and mark the real-time liquid level percentage, turbidity, deterioration degree, water content and temperature parameters in the red frame to facilitate operator observation. When the monitoring parameter is higher or lower than the set value, or the monitoring parameter increases or decreases for a period of time, the device will feedback to the main control room to alarm, and the problem can be immediately handled and investigated.

[0030] Specifically, in this embodiment, the gear oil monitoring algorithm includes a gear oil level detection algorithm, a gear oil transmittance detection algorithm and a gear oil absorption spectrum detection algorithm. The real-time status of the gear oil includes the gear oil level in the oil storage chamber, the gear oil turbidity, the degree of deterioration, the water content and the temperature.

[0031] Before the shield machine is put into operation, it needs to be calibrated to determine the total height calibration value of the gear oil tank as h=200mm, the total width calibration value of the gear oil tank as b=100mm, and the oil reservoir length as l=200mm. Assume that the original transmittance of the gear oil is 0.6; the spectral absorption peak wavelength of the gear oil is 270nm; the spectral absorption peak of water is 1940nm, and the molar absorption coefficient is 0.00001L·mol −1 cm −1 The spectral absorption peak of iron filings is 380nm, and the molar absorption coefficient is 11000L·mol −1 cm −1 ; The incident light intensity is 1, and this data is built into the receiving device.

[0032] The light source layer 8 emits light waves 5 of different wavelengths to pass through the oil reservoir and transmit to the receiving layer 2. The receiving device 3 receives the image information and absorption spectrum, and uses the preset gear oil level detection algorithm to perform the following steps on the image data: Format conversion: convert the received image data into HSV format; Color screening: Screen the colors according to the preset color value range, and remove the elements other than gear oil and gear oil level tube; Binarization: Binarization makes the positions of the removed elements in the image data appear black, and the positions of the screened elements appear white, which is more distinguishable; Noise filtering: Define the screening elements less than 10 mm as noise points, and remove the redundant noise points through Gaussian filtering operation to finally determine the element data range of the gear oil tank level tube; Element coordinate extraction: perform edge detection on the image data to extract element coordinates and determine the total height coordinates of the liquid level tube and the liquid level height coordinates of the liquid level tube in the current image data; Digital operation, the gear oil tank liquid level percentage is calculated to be 48.28%. The visually recognized liquid level percentage and the preset value are digitally operated: b×l×h×48.28%, and the current gear oil remaining amount is obtained as: 1.9312×10 -3 m 3 . According to the gear oil level value and gear oil volume, determine whether leakage or blockage occurs.

[0033] Similarly, assuming that the current image frame has 10,000 pixels, the gear oil transmittance detection method is used to perform binarization, particle edge detection, noise filtering, and brightness variance. After sequential processing, the number of highlight pixels is 5,300. The current transmittance of the gear oil is 0.53, and the turbidity of the gear oil is ((0.6-0.53) / 0.6)*100%=11%. The oil filter operation can be performed in time to increase the life of the gear oil. According to the current oil turbidity, it is judged whether the oil is mixed with impurities.

[0034] Through the gear oil absorption spectrum detection method, the transmitted light was spectrally analyzed and it was found that there were absorption spectra at 380nm and 1940nm. The transmitted light intensities were: I i =0.92, I w =0.73, indicating that the gear oil contains iron filings and water. The concentration of iron filings and water can be calculated according to the following formula: c i =0.003mol / L, c w =0.05mol / L.

[0035] In the formula, I is the transmitted light intensity, I 0 is the incident light intensity,l is the optical path length, is the molar absorption coefficient.

[0036] Reference regression prediction algorithm , the gear oil deterioration degree can be obtained y is 0.1%, and the current gear oil remaining is: 1.9312×10 -3 m 3 , it can be calculated that the water content of the oil is 2.6%. The oil deterioration degree is slight, but the water content is slightly high.

[0037] Fixed receiving gear oil absorption spectrum, calculate the ratio of incident light intensity to transmitted light intensity R p , by consulting the absorption spectrum peak ratio-temperature curve, the current gear oil temperature can be calculated to be 55.3° through interpolation, which is within the normal range.

[0038] Through the above analysis, it is found that the oil contains iron filings, and the water content is 2.6%, which is relatively high. The temperature is 55.3°, which is within the normal range. The analysis shows that the oil is deteriorated and needs to be filtered immediately. The current gear oil level percentage, gear oil turbidity, degree of deterioration, water content and temperature are immediately output to the red display on the monitoring room screen to remind the staff to filter the oil immediately. If all parameters are normal, they will also be displayed in real time on the monitoring screen, but they will not be displayed in red.

[0039] In other implementations, the gear oil monitoring algorithm may not be limited to the above three algorithms, and a suitable algorithm in the prior art may be selected according to actual needs.

[0040] In this embodiment, the gear oil monitoring algorithm is built into the receiving device. In other embodiments, the gear oil monitoring algorithm may not be deployed in the receiving device, but in the host computer, and the receiving device only receives the light wave information, and the rest of the data processing is handled by the host computer.

[0041] The present invention creatively sets an optical port on the oil storage tank, so that the real-time state of the gear oil can be detected by light waves. According to different gear oil monitoring algorithms, not only the state parameters of the gear oil itself such as turbidity can be monitored, but also the liquid level of the gear oil in the oil storage cavity can be monitored, which greatly improves the comprehensiveness of gear oil monitoring. The present invention solves the technical problem that the prior art cannot realize comprehensive monitoring of gear oil.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gear oil monitoring method, characterized in that: The method comprises: receiving light waves on the opposite side by a receiving device arranged on one side of the oil storage chamber, and obtaining the real-time state of the gear oil by a gear oil monitoring algorithm according to the light waves received by the receiving device; An oil storage cavity for storing gear oil is formed by the oil storage tank; light ports are respectively provided on two opposite sides of the oil storage tank for forming a light wave that crosses the oil storage cavity.

2. The gear oil monitoring method according to claim 1, characterized in that: The projection of the light wave in the vertical direction covers at least the top and bottom of the oil storage tank from top to bottom. The gear oil monitoring algorithm includes a gear oil level detection algorithm; the real-time status of the gear oil includes the gear oil level in the oil storage chamber.

3. The gear oil monitoring method according to claim 1, characterized in that: The gear oil monitoring algorithm includes a gear oil transmittance detection algorithm; the real-time status of the gear oil includes gear oil turbidity.

4. The gear oil monitoring method according to claim 1, characterized in that: The gear oil monitoring algorithm includes a gear oil absorption spectrum detection algorithm; the real-time status of the gear oil includes at least one of the degree of degradation, water content and temperature.

5. A gear oil tank, comprising an oil storage tank and an oil storage chamber formed by its internal space, wherein the oil storage chamber is used to store gear oil, and is characterized in that: Optical ports are respectively provided on two opposite sides of the oil storage tank for forming a light wave that crosses the oil storage cavity.

6. The gear oil tank according to claim 5, characterized in that: The projection of the light wave in the vertical direction covers at least the top and the bottom of the oil storage tank from top to bottom.

7. The gear oil tank according to claim 5, characterized in that: It also includes a tank body, which is provided with two side plates that divide the interior of the tank body into three parts. The space surrounded by the two side plates and the side wall of the tank body constitutes the oil storage cavity.

8. The gear oil tank according to claim 7, characterized in that: The two side panels are both transparent side panels to form the light port.

9. The gear oil tank according to claim 7, characterized in that: It also includes a light source layer and a receiving layer, the light source layer is used to emit light waves, and the receiving layer is provided with a receiving device for receiving the light waves emitted by the light source layer; the space enclosed by the side wall of the tank body and one of the side panels constitutes the light source layer, and the space enclosed by the side wall of the tank body and the other side panel constitutes the receiving layer.

10. The gear oil tank according to claim 9, characterized in that: A light source board having the same size and shape as the side wall of the tank body is installed on the side wall of the tank body in the light source layer, and light waves are emitted through the light source board.

11. The gear oil tank according to claim 5, characterized in that: The oil storage cavity comprises an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively located at the top and the bottom of the oil storage tank and are arranged diagonally.

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