Intelligent control system for bearing lubrication of flotation machine

Abstract

The invention provides an intelligent control system for bearing lubrication of a flotation machine, a lubricating oil adding trigger instruction is obtained through a local control station, the trigger condition of the lubricating oil adding trigger instruction comprises at least one of the following items: lubrication period arrival and bearing parameter abnormity, and the bearing parameters comprise bearing temperature data and bearing vibration data; the lubricating oil adding trigger instruction carries the lubricating point address and the oil feeding amount; the local control station generates a lubricating oil adding instruction according to the lubricating oil adding trigger instruction; and the high-pressure lubrication pump station, the distributed electromagnetic oil feeding tank and the lubricating oil flowmeter add lubricating oil to the flotation machine bearing according to the lubricating oil adding instruction. On the basis that the lubricating oil is periodically added to the bearing, the lubricating oil is flexibly and specifically added according to the use state of the bearing, stable operation of the bearing is guaranteed, and the efficiency of the flotation machine is improved.

Description

Technical Field

[0001] This application relates to the field of flotation machine lubrication technology, and in particular to an intelligent control system for flotation machine bearing lubrication. Background Technology

[0002] Flotation machines play a crucial role in ore processing, and the addition of lubricating oil is vital for the proper operation of the equipment. Traditionally, lubricating oil is added manually according to a pre-defined schedule. However, schedule-based maintenance suffers from inconsistencies, poor lubrication precision, and difficulty in strictly adhering to the lubrication schedule, often resulting in missed, over-, or insufficient additions. This compromises the healthy operation of the flotation machine, leading to inefficiency, resource waste, and operational safety hazards. Therefore, automated lubricating oil addition systems have emerged on the market, which can add lubricating oil at set times and in precise quantities, solving the problems of missed, over-, and insufficient additions associated with manual methods.

[0003] However, both manual and automatic lubrication methods require adding lubricating oil according to a set schedule and in a fixed quantity. The mechanized method cannot flexibly add lubricating oil according to the lubrication needs of the bearing, which affects the use of the bearing. Summary of the Invention

[0004] This application provides an intelligent control system for bearing lubrication of a flotation machine, which solves the problems of missed addition, excessive addition, and insufficient addition of lubricating oil in the prior art due to manual addition, which makes it impossible to guarantee the healthy operation of the flotation machine, resulting in low efficiency, waste of resources, and potential safety hazards.

[0005] This application provides an intelligent control system for bearing lubrication of a flotation machine, including: a remote monitoring platform, a lubrication unit and a detection unit, wherein the lubrication unit includes: a local control station, a high-pressure lubrication pump station, a distributed electromagnetic oil supply tank, a lubrication oil circuit, a lubrication oil flow meter and an oil pressure gauge; The remote monitoring platform is connected to the local control station and the detection unit. The local control station is connected to the high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, the lubricating oil flow meter and the oil pressure gauge. The oil pressure gauge and the lubricating oil flow meter are installed on the lubricating oil line. The detection unit acquires the first actual bearing parameters of the flotation machine bearing and sends the first actual bearing parameters to the remote monitoring platform. The first actual bearing parameters include: first bearing temperature data and first bearing vibration data. The remote monitoring platform determines whether there are any abnormal bearing parameters in the flotation machine bearing based on the first actual bearing parameters and the preset bearing parameters. If so, the remote monitoring platform generates the triggering conditions for the lubricating oil addition command, obtains the lubricating oil addition triggering command based on the generated triggering conditions, and sends the lubricating oil addition triggering command to the local control station; If not, the local control station generates a lubricating oil addition trigger command when the lubrication cycle is reached; The local control station generates a lubricating oil addition command based on the lubricating oil addition trigger command. The lubricating oil addition command is used to instruct the addition of lubricating oil to the flotation machine bearing. The lubricating oil addition trigger command carries the lubrication point address and the amount of oil to be added. The high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, and the lubricating oil flow meter add lubricating oil to the flotation machine bearings according to the lubricating oil addition command.

[0006] Optionally, the remote monitoring platform determines whether there are any abnormal bearing parameters in the flotation machine bearings based on the first actual bearing parameters and the preset bearing parameters, including: The remote monitoring platform compares the first bearing temperature data with the preset bearing temperature data in the preset bearing parameters to obtain a first comparison result. The first bearing vibration data is compared with the preset bearing vibration data in the preset bearing parameters to obtain a second comparison result; If the first comparison result and / or the second comparison result show that the bearing parameters of the flotation machine bearing are abnormal, determine whether the bearing parameters of the flotation machine bearing are abnormal.

[0007] Optionally, the remote monitoring platform obtains the lubricating oil adding trigger command based on the trigger conditions of the generated lubricating oil adding command, including: Based on the first actual bearing parameters, identify the flotation machine with abnormal bearing parameters, obtain the lubrication point address of the flotation machine, and determine the oil supply amount; The lubricating oil addition instruction is obtained based on the lubrication point address and the oil supply amount.

[0008] Optionally, determining the oil supply amount based on the first actual bearing parameters includes: Based on the flotation machine, determine a control flotation machine with the same model parameters as the flotation machine; Based on the first actual bearing parameters, determine the reference bearing parameters that are consistent with the first actual bearing parameters from the actual bearing parameters corresponding to the reference flotation machine; Obtain the historical oil supply rate of the control flotation machine under the control bearing parameters; The oil supply quantity is determined based on the historical oil supply quantity.

[0009] Optionally, after the high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, and the lubricating oil flow meter add lubricating oil to the flotation machine bearing according to the lubricating oil addition command, the system further includes: The detection unit acquires the second actual bearing parameters of the flotation machine bearing, which include: second bearing temperature data and second bearing vibration data. The remote monitoring platform determines, based on the second actual bearing parameters and the preset bearing parameters, that the flotation machine bearing has a fault other than under-lubrication.

[0010] Optionally, the second bearing vibration data includes: vibration frequency and vibration amplitude; The remote monitoring platform determines, based on the second actual bearing parameters and the preset bearing parameters, faults in the flotation machine bearing other than under-lubrication, including: The bearing failure frequency waveform corresponding to the flotation machine bearing is obtained based on the vibration frequency and vibration amplitude. Based on the bearing failure frequency waveform and the preset bearing failure frequency set, the faults existing in the bearing are determined. The preset bearing failure frequency set includes: bearing failure frequency waveforms corresponding to inner ring faults, bearing failure frequency waveforms corresponding to inner ring faults, bearing failure frequency waveforms corresponding to rolling element faults, and bearing failure frequency waveforms corresponding to cage faults.

[0011] Optionally, after the high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, and the lubricating oil flow meter add lubricating oil to the flotation machine bearing according to the lubricating oil addition command, the system further includes: When the lubrication cycle is reached, the local control station receives the lubricating oil addition trigger command.

[0012] Optionally, the detection unit includes a temperature and vibration sensor, which is mounted on the bearing of the flotation machine.

[0013] Optionally, the number of temperature and vibration sensors is two, and the two temperature and vibration sensors are symmetrically installed in the circumferential direction of the flotation machine bearing.

[0014] Optionally, the local control station includes a programmable logic controller (PLC).

[0015] The intelligent control system for flotation machine bearing lubrication provided in this application obtains lubricating oil addition trigger commands through a local control station. The trigger conditions for these commands include at least one of the following: lubrication cycle completion or abnormal bearing parameters. Bearing parameters include bearing temperature data and bearing vibration data. The lubricating oil addition trigger command instructs the local control station to generate a lubricating oil addition command, which instructs the addition of lubricating oil to the flotation machine bearing. The command carries the lubrication point address and oil supply quantity. The local control station generates the lubricating oil addition command based on the trigger command. The high-pressure lubrication pump station, distributed electromagnetic oil supply tank, and lubricating oil flow meter add lubricating oil to the flotation machine bearing according to the command. This system achieves not only periodic lubrication but also automatic lubrication of the corresponding bearing when the bearing's operating status indicates the need for lubrication. This allows for flexible and targeted lubrication, ensuring stable bearing operation and improving the efficiency of the flotation machine. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an intelligent control system for bearing lubrication of a flotation machine provided in an embodiment of this application; Figure 2 A flowchart of an intelligent control method for bearing lubrication of a flotation machine provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0019] The flotation machine is the core equipment in the flotation process. Its function is to separate useful minerals from useless gangue minerals. Utilizing the differences in the physicochemical properties of mineral surfaces, and under the action of bubbles, the target minerals are selectively concentrated to the surface of the pulp and scraped off, thus obtaining a high-grade concentrate. During operation, the flotation machine requires bearings as transmission components to support the high-speed rotation of the rotor (impeller). Lubricating oil is needed to improve the stability and continuity of bearing rotation. Therefore, the addition of lubricating oil plays a crucial role in the normal operation of the bearings and the flotation machine.

[0020] Traditionally, adding lubricating oil is done manually according to a pre-defined schedule. However, this schedule-based approach suffers from inconsistencies, poor lubrication precision, and difficulty in strictly adhering to the lubrication protocol. Issues such as missed additions, over-additions, and insufficient additions frequently occur, compromising the healthy operation of the flotation machine and leading to inefficiency, resource waste, and operational safety hazards. Therefore, automated lubricating oil addition systems have emerged on the market, allowing for timed and precise addition of lubricating oil, thus resolving the problems of missed, over-additions, and insufficient additions associated with manual methods.

[0021] However, both manual and automatic lubrication methods require adding lubricating oil according to a set schedule and in a fixed quantity. The mechanized method cannot flexibly add lubricating oil according to the lubrication needs of the bearing, which affects the use of the bearing.

[0022] To address the technical problems existing in the prior art, this application proposes an intelligent control system for bearing lubrication in flotation machines. Since bearing parameters can reflect the bearing's operating status, including whether the bearing is under-lubricated, this application monitors the bearing parameters. This allows for automatic addition of lubricating oil to the bearing, and also uses the bearing parameters as a trigger condition for adding lubricating oil. When the bearing parameters indicate under-lubrication, lubricating oil is added proactively and promptly. This achieves the goal of flexibly adding lubricating oil according to the bearing's operating status, ensuring stable bearing operation and improving the efficiency of the flotation machine.

[0023] Figure 1 This is a schematic diagram of the structure of an intelligent control system for bearing lubrication of a flotation machine provided in an embodiment of this application. Figure 1 As shown, the intelligent control system for bearing lubrication of the flotation machine includes: a remote monitoring platform 110, a lubrication unit 120 and a detection unit 130. The lubrication unit 120 includes: a local control station 121, a high-pressure lubrication pump station 122, a distributed electromagnetic oil supply tank 123, a lubrication oil circuit 134, a lubrication oil flow meter 125 and an oil pressure gauge 126. The remote monitoring platform 110 is connected to the local control station 121 and the detection unit 130. The local control station 121 is connected to the high-pressure lubrication pump station 122, the distributed electromagnetic oil supply tank 123, the lubricating oil flow meter 125 and the oil pressure gauge 126.

[0024] In this embodiment, the remote monitoring platform 110 is set up in the monitoring room and is used to monitor the operation status of the flotation machine throughout the process. The remote monitoring platform 110 is equipped with a central processing unit, a memory, etc. The central processing unit is used to perform logical operations, and the memory has stored a large amount of historical data, including historical cases and preset parameters, such as preset bearing parameters.

[0025] The lubrication unit 120 is typically used with multiple flotation machines, usually eight. Each flotation machine has two lubrication points: one for oil inlet and the other for oil outlet. Correspondingly, the lubrication unit 120 also includes two high-pressure lubrication pump stations 122, eight distributed electromagnetic oil supply tanks 123, sixteen lubricating oil flow meters 125, and one oil pressure gauge 126. The oil pressure gauge 126 is installed on the lubrication oil circuit 134.

[0026] When lubricating oil needs to be added, the local control station 121 controls the high-pressure lubrication pump station 122 to start, pressurizing the lubricating oil in the grease tank and delivering it to the single-line oil supply pipe of the lubrication oil circuit 134. The oil pressure gauge 126 on the lubrication oil circuit 134 monitors the oil supply pressure in real time. When the oil supply pressure reaches the set value, the local control station 121 sends a lubricating oil addition command sequentially to the oil inlet point and transmits the command via the fieldbus to the corresponding distributed electromagnetic oil supply tank 123, causing the tank to open and allowing lubricating oil to be added to the bearing through the inlet point. During lubrication oil addition, the lubricating oil flow meter 125 measures the actual oil supply at the corresponding lubrication point online and feeds it back to the local control station 121, achieving closed-loop control of lubricating oil addition.

[0027] Optionally, the local control station 121 includes a programmable logic controller (PLC).

[0028] The detection unit 130 includes a temperature and vibration sensor. Typically, two temperature and vibration sensors are installed symmetrically around the bearing. Optionally, the two sensors are installed on the upper and lower sides of the bearing. The temperature and vibration sensors are used to monitor and collect bearing parameters and send the collected parameters to the remote monitoring platform 110. This allows the remote monitoring platform 110 to know the bearing's operating status, and by assessing the bearing's operating status, it can determine whether the bearing is under-lubricated.

[0029] Specifically, the working process of the intelligent control system for bearing lubrication of flotation machines is illustrated through the following examples.

[0030] Figure 2 This is a flowchart illustrating an intelligent control method for bearing lubrication in a flotation machine according to an embodiment of this application. The method shown is applied to... Figure 1 The flotation machine bearing lubrication intelligent control system shown is as follows: Figure 2 As shown, the intelligent control method for bearing lubrication in flotation machines includes: S201. The local control station obtains a lubricating oil addition trigger command. The triggering conditions for the lubricating oil addition trigger command include at least one of the following: the lubrication cycle has been reached, or the bearing parameters are abnormal. The bearing parameters include: bearing temperature data and bearing vibration data. The lubricating oil addition trigger command is used to instruct the local control station to generate a lubricating oil addition command. The lubricating oil addition command is used to instruct the addition of lubricating oil to the flotation machine bearing. The lubricating oil addition trigger command carries the lubrication point address and the amount of oil supplied.

[0031] In this step, when the flotation machine is performing mineral processing, if the bearing is working normally, lubricating oil needs to be added automatically at regular intervals and in fixed quantities. However, if the bearing is in an abnormal condition, lubricating oil needs to be added even if the scheduled time for adding lubricating oil has not yet arrived. Therefore, in this embodiment, the triggering conditions for adding lubricating oil include: the lubrication cycle has been reached and the bearing parameters are abnormal.

[0032] When a lubrication cycle is reached, lubricating oil is added periodically. The user sets up an automatic lubrication control program based on the lubrication requirements of the flotation machine bearings. When a lubrication cycle is reached, the control program sends a lubrication oil addition trigger command to the PLC, causing the PLC to control the lubrication unit to automatically add lubricating oil, thus achieving periodic lubrication. The lubrication oil addition trigger command carries the lubrication point address and the oil supply amount. The trigger condition is the arrival of the lubrication cycle, the lubrication point address is the address of the oil inlet point for each flotation machine, and the oil supply amount for each flotation machine is fixed.

[0033] When a bearing experiences an abnormal operating condition, the remote monitoring platform detects this and sends a lubricant addition trigger command to the PLC. At this time, the address of the lubrication point included in the lubricant addition trigger command is the address of the oil inlet point of the flotation machine corresponding to the bearing experiencing the abnormal operating condition. The amount of oil supplied is related to the severity of the bearing's abnormal operating condition.

[0034] S202. The local control station generates a lubricating oil addition command based on the lubricating oil addition trigger command.

[0035] In this step, when the lubrication cycle is reached, the PLC sends a lubricating oil add command to the high-pressure lubrication pump station, controlling the high-pressure lubrication pump to start, pressurizing the lubricating oil in the grease tank and delivering it to the single-line oil supply pipe in the lubrication circuit. After the lubricating oil flows into the lubrication circuit, the hydraulic press monitors the lubricating oil pressure. When the lubricating oil pressure reaches the set value, the PLC sends a lubricating oil add command sequentially to the oil inlet points of the eight flotation machines, as well as the corresponding distributed electromagnetic oil supply tanks and lubricating oil flow meters, controlling the on / off state of the distributed electromagnetic oil supply tanks. During the lubricating oil add process, the lubricating oil flow meters measure the actual oil supply at the corresponding lubrication point online and feed it back to the PLC.

[0036] When the trigger condition is abnormal bearing parameters, it is not necessary to add lubricating oil to all bearings; only the bearings with abnormal parameters need to be lubricated. The remote monitoring platform sends the address of the oil inlet point of the flotation machine corresponding to the bearing with abnormal parameters and the calculated oil supply amount to the PLC via a lubricating oil addition trigger command. After receiving the lubricating oil addition trigger command, the PLC obtains the lubrication point address and oil supply amount from the command and generates a lubricating oil addition command, which also includes the lubrication point address and oil supply amount.

[0037] The PLC sends a lubricating oil add command to the high-pressure lubrication pump station, controlling the high-pressure lubrication pump to start, pressurizing the lubricating oil in the grease tank and delivering it to the single-line oil supply pipe in the lubrication circuit. After the lubricating oil flows into the lubrication circuit, the hydraulic press monitors the lubricating oil pressure. When the lubricating oil pressure reaches the set value, the PLC sends a lubricating oil add command sequentially to the distributed electromagnetic oil supply tank and lubricating oil flow meter corresponding to the lubrication point address. This means the command is sent to the distributed electromagnetic oil supply tank and lubricating oil flow meter corresponding to the flotation machine with abnormal bearing parameters, thus adding lubricating oil specifically to the bearings of the flotation machine with abnormal bearing parameters.

[0038] S203, high-pressure lubrication pump station, distributed electromagnetic oil supply tank, and lubricating oil flow meter add lubricating oil to the flotation machine bearings according to the lubricating oil addition command.

[0039] In this step, a distributed controller is installed on the distributed electromagnetic oil supply tank. After receiving the lubricating oil addition command, the distributed controller opens the corresponding distributed electromagnetic oil supply tank according to the lubricating oil addition command to supply lubricating oil to the oil inlet point.

[0040] Under the control of a PLC, a high-pressure lubrication pump station, a distributed electromagnetic oil supply tank, a lubrication oil circuit, a lubrication oil flow meter, and an oil pressure gauge are used to add lubrication oil to the oil inlet.

[0041] In this embodiment, a lubricating oil addition trigger command is obtained through a local control station. The triggering conditions for the lubricating oil addition trigger command include at least one of the following: the lubrication cycle has been reached, or the bearing parameters are abnormal. The bearing parameters include bearing temperature data and bearing vibration data. The lubricating oil addition trigger command instructs the local control station to generate a lubricating oil addition command, which instructs the addition of lubricating oil to the flotation machine bearing. The lubricating oil addition trigger command carries the lubrication point address and the oil supply amount. The local control station generates a lubricating oil addition command based on the lubricating oil addition trigger command. The high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, and the lubricating oil flow meter add lubricating oil to the flotation machine bearing according to the lubricating oil addition command. This achieves the goal of not only periodically adding lubricating oil to the bearings, but also automatically adding lubricating oil to the corresponding bearings when the bearing's operating status indicates that lubricating oil needs to be added. This allows for flexible and targeted lubricating oil addition, ensuring stable bearing operation and improving the efficiency of the flotation machine.

[0042] Optionally, prior to S201, the method further includes: S301, The detection unit acquires the first actual bearing parameters of the flotation machine bearing and sends the first actual bearing parameters to the remote monitoring platform.

[0043] In this step, during flotation machine operation, temperature and vibration sensors periodically monitor and collect bearing parameters to obtain actual bearing parameters, i.e., the first actual bearing parameters. These first actual bearing parameters include: bearing temperature data and bearing vibration data. Bearing temperature data typically includes: bearing temperature, shaft temperature acceleration, and peak shaft temperature. Bearing vibration data typically includes vibration frequency and vibration amplitude.

[0044] After the temperature and vibration sensor collects the first actual bearing parameters, it sends the first actual bearing parameters to the remote monitoring platform.

[0045] S302. The remote monitoring platform determines whether there is any abnormal bearing parameter in the flotation machine bearing based on the first actual bearing parameter and the preset bearing parameter. If yes, then execute S303; otherwise, execute S304.

[0046] In this step, after receiving the first actual bearing parameters, the remote monitoring platform retrieves the preset bearing parameters stored in the memory and compares them. Based on the comparison results, it determines whether there are any abnormal bearing parameters. Since the first actual bearing parameters include first bearing temperature data and first bearing vibration data, the first bearing temperature data is compared with the preset bearing temperature data in the preset bearing parameters, and the bearing vibration data is compared with the preset bearing vibration data in the preset bearing parameters. If either the bearing temperature data or the bearing vibration data shows an abnormal bearing parameter, then an abnormal bearing parameter is confirmed.

[0047] One specific implementation of S302 is as follows: S3021. The remote monitoring platform compares the first bearing temperature data with the preset bearing temperature data in the preset bearing parameters to obtain the first comparison result.

[0048] Specifically, for bearing temperature data, the remote monitoring platform compares it with the preset bearing temperature data in the preset bearing parameters. For bearing temperature, it compares the bearing temperature in the first actual bearing parameters with the preset bearing temperature in the preset bearing parameters to obtain the first comparison result.

[0049] The preset bearing temperature of the preset bearing parameters is related to the model of the flotation machine, or in other words, to the size of the flotation machine. The larger the size of the flotation machine, the higher the preset bearing temperature of the preset bearing parameters. Generally, the preset bearing temperature of the preset bearing parameters is 70°C.

[0050] S3022. Compare the first bearing vibration data with the preset bearing vibration data in the preset bearing parameters to obtain the second comparison result.

[0051] Specifically, the preset bearing vibration data in the preset bearing parameters is the bearing vibration waveform corresponding to the normal use of the bearing. After obtaining the first bearing vibration data, the corresponding waveform is obtained based on the first bearing vibration data, and it is compared with the waveform corresponding to the preset bearing vibration data to obtain the second comparison result.

[0052] S3023. When the first comparison result and / or the second comparison result show that the bearing parameters of the flotation machine bearing are abnormal, determine whether there are abnormal bearing parameters in the flotation machine bearing.

[0053] Specifically, when the bearing temperature in the first actual bearing parameter is greater than the preset bearing temperature in the preset bearing parameter, the bearing parameter is confirmed to be abnormal.

[0054] When the second comparison result shows that the waveform obtained from the first bearing vibration data is inconsistent with the waveform corresponding to the preset bearing vibration data, it can also be confirmed that the bearing parameters are abnormal.

[0055] That is, when at least one of the first comparison results and the second comparison result shows that the bearing parameters are abnormal, the bearing parameters are confirmed to be abnormal.

[0056] S303. Generate the trigger conditions for the lubricating oil addition command through the remote monitoring platform, obtain the lubricating oil addition trigger command based on the generated trigger conditions, and send the lubricating oil addition trigger command to the lubricating oil addition trigger command.

[0057] Among them, the lubricating oil addition trigger command is used to instruct the local control station to generate a lubricating oil addition command. The lubricating oil addition command is used to instruct the addition of lubricating oil to the flotation machine bearing. The lubricating oil addition trigger command carries the lubrication point address and the amount of oil supplied.

[0058] In this step, after confirming the abnormal bearing parameters, the trigger conditions for the lubricant addition command are generated. Since the abnormal bearing condition is very likely related to insufficient lubrication, the lubricant addition trigger command is obtained according to the trigger conditions.

[0059] After receiving the lubricant addition trigger command, the remote monitoring platform is interlocked with the lubrication unit to send the lubricant addition trigger command to the corresponding PLC, so as to actively add lubricant when the bearing has an abnormal operating condition.

[0060] Optionally, one specific implementation of "obtaining the lubricating oil adding trigger command based on the trigger conditions of the generated lubricating oil adding command" in S303 is as follows: S3031. Identify flotation machines with abnormal bearing parameters and obtain the lubrication point address of the flotation machine.

[0061] Specifically, based on the first actual bearing parameters corresponding to each bearing, the bearings that are experiencing abnormal operating conditions are identified, thereby determining the flotation machine corresponding to that bearing. Each flotation machine is equipped with an oil inlet point, so once the flotation machine is determined, the address of the lubrication point of the flotation machine is also determined.

[0062] S3032. Determine the oil supply amount based on the first actual bearing parameters.

[0063] Specifically, the first actual bearing parameter reflects the current operating condition of the bearing. For example, when the bearing temperature is greater than 70°C, it indicates that the bearing friction is large and the lubrication is insufficient. The higher the bearing temperature, the greater the friction, indicating a higher degree of insufficient lubrication, and more lubricating oil needs to be added. Therefore, the amount of oil to be supplied can be determined by the first actual bearing parameter.

[0064] Alternatively, another approach for S3032 is: S3032a. Based on the flotation machine, determine a reference flotation machine with the same model parameters as the flotation machine.

[0065] Specifically, the remote monitoring platform stores a large number of historical cases, which are the corresponding oil supply amounts for each abnormal bearing condition when the flotation machine experiences abnormal operation. Therefore, historical cases can be used to determine the oil supply amount more accurately.

[0066] Therefore, when it is determined that the bearing is malfunctioning, a control flotation machine with the same model parameters as the corresponding flotation machine is identified from historical cases. The number of control flotation machines is at least one.

[0067] S3032b: Based on the first actual bearing parameters, determine the reference bearing parameters that are consistent with the first actual bearing parameters from the actual bearing parameters corresponding to the reference flotation machine.

[0068] Specifically, after the reference flotation machine is determined, it is necessary to determine whether there is a reference flotation machine with a similar or consistent bearing usage condition. Therefore, it is necessary to determine the actual bearing parameters of the reference flotation machine, compare the first actual bearing parameters with the actual bearing parameters of the reference flotation machine, and determine the reference bearing parameters that are consistent with the first actual bearing parameters.

[0069] S3032c: Obtain the historical oil supply of the reference flotation machine under the reference bearing parameters.

[0070] S3032d: Determine the fuel supply amount based on historical fuel supply amounts.

[0071] Specifically, the bearing parameters that are consistent with the first actual bearing parameters indicate that the bearing usage condition of the reference flotation machine is consistent with that of the flotation machine. The historical oil supply volume resolved the abnormal bearing usage condition of the reference flotation machine at that time. Therefore, determining the historical oil supply volume as the oil supply volume of the flotation machine can resolve the abnormal bearing condition of the flotation machine.

[0072] S3033. Obtain a lubricating oil addition command based on the lubrication point address and oil supply amount.

[0073] S304. When the lubrication cycle is reached, a lubricating oil addition trigger command is generated by the local control station. In this step, if there are no abnormal bearing parameters, it means that the bearing is in normal use. At this time, according to the set control program, when the lubrication cycle arrives, the PLC will generate a lubricating oil addition trigger command to perform the routine periodic lubrication oil addition operation.

[0074] In this embodiment, the first actual bearing parameters of the flotation machine bearing are obtained through the detection unit and sent to the remote monitoring platform. The remote monitoring platform generates trigger conditions for a lubricant addition command based on the first actual bearing parameters and preset bearing parameters. The remote monitoring platform obtains the lubricant addition trigger command based on the generated trigger conditions and sends the lubricant addition trigger command to the local control station. This embodiment enables the remote monitoring platform to monitor the flotation machine status in real time. When the bearing exhibits abnormal operating conditions, the remote monitoring platform and the lubrication unit work together to add lubricant, improving the flexibility of lubricant addition for the bearing.

[0075] Optionally, after S203, the method further includes: S204. Obtain the second actual bearing parameters of the flotation machine bearing.

[0076] Specifically, when the trigger condition is abnormal bearing parameters, the temperature and vibration sensor will still collect bearing parameters after lubricating oil has been added to obtain the actual bearing parameters. In order to distinguish the actual bearing parameters collected before adding lubricating oil, the actual bearing parameters collected after adding lubricating oil due to abnormal bearing parameters are called the second actual bearing parameters.

[0077] The remote monitoring platform obtained the second actual bearing parameters.

[0078] S205. Based on the second actual bearing parameters and the preset bearing parameters, determine the faults of the flotation machine bearings other than the under-lubrication fault.

[0079] Specifically, the remote monitoring platform compares the second actual bearing parameters with the preset bearing parameters. The comparison method is as shown in S302. If the bearing still shows an abnormal operating condition, it means that the abnormal operating condition of the bearing is not caused by insufficient lubrication, but by other faults, such as pitting, peeling, or cracks. In this case, the fault can be determined based on the bearing vibration data in the second actual bearing parameters.

[0080] One specific implementation of S205 is as follows: S2051. Obtain the bearing failure frequency waveform corresponding to the flotation machine bearing based on the vibration frequency and vibration amplitude.

[0081] Specifically, after receiving the second actual bearing parameters, the remote monitoring platform generates a bearing failure frequency waveform based on the vibration frequency and vibration amplitude, and reflects the bearing's usage status through the bearing failure frequency waveform.

[0082] S2052. Determine the bearing faults based on the bearing fault frequency waveform and the preset bearing fault frequency set. The preset bearing fault frequency set includes: the bearing fault frequency waveform corresponding to the inner ring fault, the bearing fault frequency waveform corresponding to the inner ring fault, the bearing fault frequency waveform corresponding to the rolling element fault, and the bearing fault frequency waveform corresponding to the cage fault.

[0083] Specifically, after obtaining the bearing failure frequency waveform corresponding to the flotation machine bearing based on the vibration frequency and vibration amplitude, the bearing failure frequency waveform is compared sequentially with the bearing failure frequency waveforms corresponding to inner ring failure, inner ring failure, rolling element failure, and cage failure included in the preset bearing failure frequency set to determine the existing bearing failure.

[0084] Optionally, after S203, the method further includes: S207. When the lubrication cycle is reached, obtain the lubricating oil addition trigger command.

[0085] Specifically, when the trigger condition is abnormal bearing parameters, after adding lubricating oil, the PLC will still periodically add lubricating oil according to the control program to ensure the stable operation of the bearing.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An intelligent control system for bearing lubrication in a flotation machine, characterized in that, include: The system includes a remote monitoring platform, a lubrication unit, and a detection unit. The lubrication unit comprises: a local control station, a high-pressure lubrication pump station, a distributed electromagnetic oil supply tank, a lubrication oil circuit, a lubrication oil flow meter, and an oil pressure gauge. The remote monitoring platform is connected to the local control station and the detection unit. The local control station is connected to the high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, the lubricating oil flow meter and the oil pressure gauge. The oil pressure gauge and the lubricating oil flow meter are installed on the lubricating oil line. The detection unit acquires the first actual bearing parameters of the flotation machine bearing and sends the first actual bearing parameters to the remote monitoring platform. The first actual bearing parameters include: first bearing temperature data and first bearing vibration data. The remote monitoring platform determines whether there are any abnormal bearing parameters in the flotation machine bearing based on the first actual bearing parameters and the preset bearing parameters. If so, the remote monitoring platform generates the triggering conditions for the lubricating oil addition command, obtains the lubricating oil addition triggering command based on the generated triggering conditions, and sends the lubricating oil addition triggering command to the local control station; If not, the local control station generates a lubricating oil addition trigger command when the lubrication cycle is reached; The local control station generates a lubricating oil addition command based on the lubricating oil addition trigger command. The lubricating oil addition command is used to instruct the addition of lubricating oil to the flotation machine bearing. The lubricating oil addition trigger command carries the lubrication point address and the amount of oil to be added. The high-pressure lubrication pump station, the distributed electromagnetic oil supply tank, and the lubricating oil flow meter add lubricating oil to the flotation machine bearings according to the lubricating oil addition command.

2. The system according to claim 1, characterized in that, The remote monitoring platform determines whether there are any abnormal bearing parameters in the flotation machine bearings based on the first actual bearing parameters and the preset bearing parameters, including: The remote monitoring platform compares the first bearing temperature data with the preset bearing temperature data in the preset bearing parameters to obtain a first comparison result. The first bearing vibration data is compared with the preset bearing vibration data in the preset bearing parameters to obtain a second comparison result; If the first comparison result and / or the second comparison result show that the bearing parameters of the flotation machine bearing are abnormal, determine whether the bearing parameters of the flotation machine bearing are abnormal.

3. The system according to claim 1, characterized in that, The remote monitoring platform obtains the lubricating oil addition trigger command based on the trigger conditions of the generated lubricating oil addition command, including: Based on the first actual bearing parameters, identify the flotation machine with abnormal bearing parameters, obtain the lubrication point address of the flotation machine, and determine the oil supply amount; The lubricating oil addition instruction is obtained based on the lubrication point address and the oil supply amount.

4. The system according to claim 3, characterized in that, Determining the oil supply amount based on the first actual bearing parameters includes: Based on the flotation machine, determine a control flotation machine with the same model parameters as the flotation machine; Based on the first actual bearing parameters, determine the reference bearing parameters that are consistent with the first actual bearing parameters from the actual bearing parameters corresponding to the reference flotation machine; Obtain the historical oil supply rate of the control flotation machine under the control bearing parameters; The oil supply quantity is determined based on the historical oil supply quantity.

5. The system according to claim 1, characterized in that, After the high-pressure lubrication pump station, distributed electromagnetic oil supply tank, and lubricating oil flow meter add lubricating oil to the flotation machine bearings according to the lubricating oil addition command, the system further includes: The detection unit acquires the second actual bearing parameters of the flotation machine bearing, which include: second bearing temperature data and second bearing vibration data. The remote monitoring platform determines, based on the second actual bearing parameters and the preset bearing parameters, that the flotation machine bearing has a fault other than under-lubrication.

6. The system according to claim 5, characterized in that, The second bearing vibration data includes: vibration frequency and vibration amplitude; The remote monitoring platform determines, based on the second actual bearing parameters and the preset bearing parameters, faults in the flotation machine bearing other than under-lubrication, including: The bearing failure frequency waveform corresponding to the flotation machine bearing is obtained based on the vibration frequency and vibration amplitude. Based on the bearing failure frequency waveform and the preset bearing failure frequency set, the faults existing in the bearing are determined. The preset bearing failure frequency set includes: bearing failure frequency waveforms corresponding to inner ring faults, bearing failure frequency waveforms corresponding to inner ring faults, bearing failure frequency waveforms corresponding to rolling element faults, and bearing failure frequency waveforms corresponding to cage faults.

7. The system according to claim 1, characterized in that, After the high-pressure lubrication pump station, distributed electromagnetic oil supply tank, and lubricating oil flow meter add lubricating oil to the flotation machine bearings according to the lubricating oil addition command, the system further includes: When the lubrication cycle is reached, the local control station receives the lubricating oil addition trigger command.

8. The system according to claim 1, characterized in that, The detection unit includes a temperature and vibration sensor, which is mounted on the bearing of the flotation machine.

9. The system according to claim 8, characterized in that, The number of temperature and vibration sensors is two, and the two temperature and vibration sensors are symmetrically installed in the circumferential direction of the flotation machine bearing.

10. The system according to claim 1, characterized in that, The local control station includes a programmable logic controller (PLC).

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