A device for detecting the thickness of an oil film in a mill bearing portion

Abstract

The utility model discloses a kind of mill bearing part oil film thickness detection devices, the device includes detection device one and detection device two, also involve end cover flange, bearing cover, hollow shaft and saddle, detection device one is equipped with several, each is by eddy current displacement sensor mounting plate, nut one, first eddy current displacement sensor, steel sheet one, steel sheet two and connecting flange one component, detection device two is by nut two, steel sheet, second eddy current displacement sensor and connecting flange two component.Working, the distance of corresponding position and detection surface is detected using eddy current displacement sensor, and then reflect or assist to reflect oil film thickness condition, provide guarantee for mill bearing stable operation.

Description

Technical Field

[0001] This utility model relates to the field of oil film thickness detection technology, and in particular to a device for detecting oil film thickness in mill bearings. Background Technology

[0002] Mills are key grinding equipment in industries such as mining, cement, power, and metallurgy, and are typically large in size and high in power. Their core rotating components are supported by main bearings, so the operating condition of the bearings directly determines the reliability, lifespan, and operating costs of the mill.

[0003] The oil film plays a crucial role in bearing loads, reducing surface friction and wear, dissipating heat, and damping vibrations. If the oil film fails, the hollow shaft will come into direct contact with the bearing surface, causing scratches, abrasions, or even severe wear. In extreme cases, the high temperatures generated by friction can cause the bearing alloy to melt, leading to bearing failure, seizure, or other malfunctions. Repairing or replacing mill bearings requires prolonged downtime, resulting in significant production losses, and the repair or replacement costs are extremely high.

[0004] Therefore, to avoid the above problems and ensure the normal, stable, and efficient operation of the mill, it is of great significance to invent a mill bearing oil film detection device. Utility Model Content The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a device for detecting the oil film thickness of a mill bearing.

[0005] To solve the above problems, the technical solution of this utility model is: a mill bearing oil film thickness detection device, including a detection device one and a detection device two for detection; The detection device 1 consists of several components, including an eddy current displacement sensor mounting plate, a nut, a first eddy current displacement sensor, a steel plate, a steel plate, and a connecting flange. The first eddy current displacement sensor is mounted on the eddy current displacement sensor mounting plate via the nut. The eddy current displacement sensor mounting plate is connected to the steel plate. The steel plate and the steel plate are fixed together. The steel plate is connected to the connecting flange. The detection device 1 is installed on the outer steel plate of the bearing cover directly above it and on both sides of the outer steel plate of the bearing cover at a distance of 30° from the x-axis. It is installed on the bearing cover via the connecting flange, bolt, washer, and nut. The detection device 2 includes a nut 2, a steel plate, a second eddy current displacement sensor and a connecting flange 2. The second eddy current displacement sensor is installed by the nut 2 and connected to the steel plate. The steel plate and the connecting flange 2 are fixed. The detection device 2 is located directly below the outside of the saddle and is installed with the saddle by the connecting flange 2, bolt 2, and washer 2. It also includes end cover flanges, bearing covers, hollow shafts and saddles. The end cover flanges are connected to the end of the mill, the bearing covers are used to install bearings, the hollow shafts are the rotating parts of the mill, and the saddles support the mill.

[0006] Furthermore, the first eddy current displacement sensor in the detection device is used to detect the distance between the relevant position of the outer steel plate of the bearing cover and the corresponding detection surface, so as to reflect the relevant parameters of oil film thickness.

[0007] Furthermore, the second eddy current displacement sensor in the second detection device is used to detect the distance between the relevant position directly below the outer side of the saddle and the corresponding detection surface, thus helping to reflect the oil film thickness.

[0008] Furthermore, bolt one, nut three, and washer one work together to achieve a detachable connection between the detection device one and the bearing cover.

[0009] Furthermore, a matching nut is provided on the outside of bolt two, and bolt two, nut and washer two are fitted together to connect detection device two and saddle.

[0010] Furthermore, the distribution of several detection devices in the detection device 1 enables the collection of data related to the oil film thickness of the mill bearing from multiple angles.

[0011] Furthermore, the structural fit between the eddy current displacement sensor mounting plate, steel plate one, and steel plate two provides support for the installation of the first eddy current displacement sensor.

[0012] Furthermore, the installation position and structural design of the second detection device enable it to specifically detect the oil film thickness in the saddle area, forming a detection system for the mill bearing section in conjunction with the first detection device.

[0013] The advantages of this invention compared to existing technologies are as follows: The mill bearing oil film thickness detection device, through the collaborative design of detection device one and detection device two, achieves accurate and multi-dimensional detection of oil film thickness. Detection device one employs several components equipped with first eddy current displacement sensors, respectively installed above and to both sides of the outer steel plate of the bearing cover at a distance of 30° from the x-axis. The eddy current displacement sensors, utilizing the principle of electromagnetic induction, can accurately detect changes in the distance between themselves and the corresponding detection surface of the outer steel plate of the bearing cover. When the oil film thickness of the bearing changes, the relative position of the bearing cover and the internal rotating components will shift slightly, resulting in a corresponding change in the distance between the sensor of detection device one and the detection surface. By capturing this distance parameter, the relevant state of the oil film thickness can be directly reflected. Simultaneously, detection device two is installed below the outer side of the saddle, with a second eddy current displacement sensor. Using the same electromagnetic induction detection principle, it detects the distance between itself and the corresponding detection surface of the saddle. As a mill support component, the relative position change of the saddle and the rotating components of the mill indirectly reflects the stress on the bearing and the oil film bearing state, thus further reflecting the oil film thickness. The two detection devices start from two core positions: the critical angle of the bearing cover and the saddle support area. Combined with the high-precision detection characteristics of the eddy current displacement sensor, they form a three-dimensional detection mode that combines direct detection with auxiliary verification. This effectively avoids the blind spots that may exist in a single detection position or a single detection method. It can obtain more comprehensive and accurate data on the oil film thickness of the mill bearing, providing a reliable detection basis for subsequent judgment on whether the oil film thickness meets the operating requirements and timely detection of oil film abnormalities, thus ensuring the stable operation of the mill bearing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall assembly structure of the detection device of this utility model.

[0015] Figure 2 This is a schematic diagram of the detection device of this utility model.

[0016] Figure 3 This is a schematic diagram of the second detection device of this utility model.

[0017] Figure 4 This is a schematic diagram of the installation structure of the detection device of this utility model.

[0018] Figure 5 This is a schematic diagram of the installation structure of the detection device II of this utility model.

[0019] As shown in the figure: 1. Detection device one; 2. Detection device two; 21. Eddy current displacement sensor mounting plate; 22. Nut one; 23. First eddy current displacement sensor; 24. Steel plate one; 25. Steel plate two; 26. Connecting flange one; 31. Nut two; 32. Steel plate; 33. Second eddy current displacement sensor; 34. Connecting flange two; 41. End cover flange; 42. Bolt one; 43. Bearing cover; 44. Washer one; 45. Nut three; 51. Hollow shaft; 52. Bolt two; 53. Washer two; 54. Saddle. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0021] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0022] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figures 1 to 5 As shown, a mill bearing oil film thickness detection device includes a detection device 1 and a detection device 2 for detection, aiming to achieve accurate detection of the oil film thickness in the mill bearing through multi-directionally arranged detection components. Figure 1 As shown, the device mainly consists of two parts: detection device 1 and detection device 2. It is also used in conjunction with existing mill components such as end cover flange 41, bearing cover 43, hollow shaft 51 and saddle 54 to achieve installation and operation. The detection device 1 has several components, including an eddy current displacement sensor mounting plate 21, a nut 22, a first eddy current displacement sensor 23, a steel plate 24, a steel plate 25, and a connecting flange 26. In terms of structural connection, the first eddy current displacement sensor 23 is fixedly installed on the eddy current displacement sensor mounting plate 21 by the nut 22 to ensure stable installation of the sensor.

[0024] The eddy current displacement sensor mounting plate 21 is fixedly connected to steel plate 24. Steel plate 24 and steel plate 25 are also fixedly connected. Steel plate 25 is connected to connecting flange 26, forming a stable overall structure. In terms of installation position, the detection device 1 is installed directly above the outer steel plate of the bearing cover 43 and on both sides of the outer steel plate of the bearing cover 43 at a distance of 30° from the x-axis. The installation method involves connecting flange 26 with bolts 42, washers 44, and nuts 45 to achieve a detachable connection with the bearing cover 43, facilitating future installation, maintenance, and replacement of the detection device 1.

[0025] The main function of the first eddy current displacement sensor 23 in the detection device 1 is to detect the distance between the relevant position of the outer steel plate of the bearing cover 43 and the corresponding detection surface, and to reflect the oil film thickness-related parameters through this distance parameter. Since several detection devices 1 are set up and distributed in different positions, data related to the oil film thickness of the mill bearing can be collected from multiple angles, greatly improving the comprehensiveness and accuracy of the detection.

[0026] Meanwhile, the structural cooperation of the eddy current displacement sensor mounting plate 21, steel plate 24, and steel plate 25 provides a stable mounting support structure for the first eddy current displacement sensor 23, ensuring the stability of the sensor's detection operation.

[0027] The detection device 2 includes a second nut 31, a steel plate 32, a second eddy current displacement sensor 33, and a second connecting flange 34. In terms of structural connection, the second eddy current displacement sensor 33 is installed and fixed by the second nut 31. The second eddy current displacement sensor 33 is connected to the steel plate 32. The steel plate 32 and the second connecting flange 34 are fixedly connected.

[0028] In terms of installation position, the detection device 2 is located directly below the outside of the saddle 54. It is connected and fixed to the saddle 54 by connecting flange 2 34, bolt 2 52, washer 2 53, and a nut that matches the outside of bolt 2 52. This connection method is also a detachable connection, which facilitates maintenance operations.

[0029] The second eddy current displacement sensor 33 in detection device 2 is used to detect the distance between a relevant position directly below the outer side of the saddle 54 and the corresponding detection surface, thereby helping to reflect the oil film thickness. Its installation position and structural design enable it to specifically detect the oil film thickness in the saddle 54 area, forming a more complete detection system for the mill bearing section in conjunction with detection device 1.

[0030] The end cover flange 41 is connected to the end of the mill and serves as a connection and fixation function; the bearing cover 43 is used to install the bearing and is the installation base of the detection device 1; the hollow shaft 51 is a rotating part of the mill, and its operating state is closely related to the oil film thickness; the saddle 54 supports the mill and is also the installation carrier of the detection device 2.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for detecting the oil film thickness in a mill bearing, characterized in that, Includes detection device one (1) and detection device two (2) for detection; The detection device 1 (1) is provided in several parts. The detection device 1 (1) includes an eddy current displacement sensor mounting plate (21), a nut (22), a first eddy current displacement sensor (23), a steel plate (24), a steel plate (25), and a connecting flange (26). The first eddy current displacement sensor (23) is mounted on the eddy current displacement sensor mounting plate (21) by the nut (22). The eddy current displacement sensor mounting plate (21) is connected to the steel plate (24). The steel plate (24) and the steel plate (25) are fixed. The steel plate (25) is connected to the connecting flange (26). The detection device 1 (1) is installed on the outer steel plate of the bearing cover (43) directly above it and on both sides of the outer steel plate of the bearing cover (43) at a distance of 30° from the x-axis. It is installed on the bearing cover (43) by the connecting flange (26) in conjunction with bolts (42), washers (44), and nuts (45). The detection device 2 (2) includes a nut 2 (31), a steel plate (32), a second eddy current displacement sensor (33), and a connecting flange 2 (34). The second eddy current displacement sensor (33) is installed by the nut 2 (31) and connected to the steel plate (32). The steel plate (32) and the connecting flange 2 (34) are fixed. The detection device 2 (2) is located directly below the outside of the saddle (54) and is installed with the saddle (54) by the connecting flange 2 (34) in conjunction with bolt 2 (52) and washer 2 (53). It also includes an end cover flange (41), a bearing cover (43), a hollow shaft (51), and a saddle (54). The end cover flange (41) is connected to the end of the mill. The bearing cover (43) is used to install the bearing. The hollow shaft (51) is a rotating component of the mill. The saddle (54) provides support for the mill.

2. The mill bearing oil film thickness detection device according to claim 1, characterized in that, The first eddy current displacement sensor (23) in the detection device (1) is used to detect the distance between the relevant position of the outer steel plate of the bearing cover (43) and the corresponding detection surface, so as to reflect the relevant parameters of oil film thickness.

3. The mill bearing oil film thickness detection device according to claim 1, characterized in that, The second eddy current displacement sensor (33) in the second detection device (2) is used to detect the distance between the relevant position directly below the outer side of the saddle (54) and the corresponding detection surface, and to help reflect the oil film thickness.

4. The mill bearing oil film thickness detection device according to claim 1, characterized in that, The bolt (42), nut (45) and washer (44) work together to achieve a detachable connection between the detection device (1) and the bearing cover (43).

5. The mill bearing oil film thickness detection device according to claim 1, characterized in that, The bolt two (52) is provided with a matching nut on the outside. The bolt two (52), the nut and the washer two (53) are used to connect the detection device two (2) and the saddle (54).

6. The mill bearing oil film thickness detection device according to claim 1, characterized in that, The distribution of several detection devices in the detection device 1 (1) enables the collection of data related to the oil film thickness of the mill bearing from multiple angles.

7. The mill bearing oil film thickness detection device according to claim 1, characterized in that, The structural cooperation of the eddy current displacement sensor mounting plate (21), steel plate one (24), and steel plate two (25) provides support for the installation of the first eddy current displacement sensor (23).

8. A mill bearing oil film thickness detection device according to any one of claims 1-7, characterized in that, The installation position and structural design of the second detection device (2) enable it to specifically detect the oil film thickness in the saddle (54) area, and cooperate with the first detection device (1) to form a detection system for the mill bearing.

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