Multi-gearbox lubricating oil on-line monitoring method and monitoring device

Abstract

The invention discloses a multi-gearbox lubricating oil on-line monitoring method and monitoring device. The method specifically comprises the following steps: collecting lubricating oil product parameter data of a plurality of gearboxes; transmitting data and carrying out data preprocessing; calculating an average value and a standard deviation of various oil product parameters of the plurality of gearbox lubricating oil, and setting an allowable deviation range; judging whether each oil product parameter value of each gearbox lubricating oil exceeds an allowable deviation range or not; and if part of the gear box oil product parameter data exceeds the allowable deviation range, increasing the acquisition frequency for re-monitoring, and finally sending out an early warning or alarm signal. According to the invention, online monitoring of the lubricating oil product states of a plurality of gearboxes can be effectively realized, the lubricating oil product states are timely transmitted to a vehicle control system or a ground console, data can be stored and retrieved in batches, visual inspection or sampling inspection by maintainers is not needed, the economic and labor cost of gearbox operation and maintenance is reduced, and the working efficiency is improved. And the operation and maintenance intellectualization is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil liquid and oil product online monitoring, and in particular to a multi-gearbox lubricating oil online monitoring method and monitoring device. Background Art

[0002] Lubricating oil is the "blood" of the gearbox of rail transit vehicles, and its condition directly affects the safety and life of the gearbox. The increase in the operating speed of rail transit vehicles has made the working environment of various vehicle components more complex, and has also put forward higher requirements on the performance of gearbox lubricating oil. The increase in operating mileage makes the lubricating oil more prone to failure.

[0003] Most of the existing online monitoring technologies for lubricating oil in mechanical equipment require the use of oil pumps or other oil extraction equipment to extract the lubricating oil from the mechanical equipment, or to set up a special oil circuit on the mechanical equipment for the monitoring equipment to perform online monitoring. At present, the lubricating oil monitoring of rail transit gearboxes adopts the maintenance method of manual visual inspection, sampling inspection, and regular replacement, which has the disadvantages of long monitoring cycle, high monitoring cost, complex oil collection work, and manual errors.

[0004] The structural space of rail transit vehicles is strictly controlled, and the vehicle bogie has a compact structure. The gearbox is an important component of the bogie. Its limits and space have strict requirements, and it is impossible to set up external oil channels or carry large monitoring equipment. Rail transit vehicles are high-speed mobile equipment, and they mostly run on long and long routes. The line conditions are harsh and the environment is complex and changeable. Therefore, the online oil monitoring device must have good adaptability, can work stably under variable and harsh conditions, and can operate stably in the collection and transmission links. During the operation of the vehicle, the gearbox and surrounding components will produce large vibrations, so the online oil monitoring device must have good impact and vibration resistance. The gearbox is close to the motor, and electronic equipment such as sensors are prone to electromagnetic interference with the motor. Therefore, the online oil monitoring device must have good anti-electromagnetic interference ability and comply with electromagnetic compatibility tests.

[0005] In order to realize the online monitoring of the lubricating oil status of rail transit gearboxes, it is necessary to develop a reliable online monitoring device for the lubricating oil status that does not affect the normal operation of the gearbox.

[0006] The existing patent CN206683719U discloses a high-speed train gearbox and a high-speed train monitoring system. The high-speed train gearbox includes a box body, a lubricating oil monitoring device and an oil status acquisition card; the oil status acquisition card is arranged on the box body, and the lubricating oil monitoring device includes an oil quality monitoring unit for monitoring the quality of the lubricating oil in the box body. The oil quality monitoring unit is arranged in the box body and is communicatively connected with the oil status acquisition card.

[0007] The existing patent CN2021104659817 discloses a gearbox oil field monitoring device and method, which mainly include an online oil monitor, a signal processing module, a data communication module, a central control unit, a remote monitoring terminal and a power supply module; the online oil monitor includes: a transmission pipe 1, a filter chamber, a solenoid valve 1, an oil monitoring box, a solenoid valve 2, and a transmission pipe 2; the filter chamber is provided with an anti-clogging filter and a cleaning box; one end of the transmission pipe 1 is connected to the oil circuit of the gearbox to be tested, and the other end is connected to the filter chamber; the oil monitoring box is connected to the transmission pipe 2; the oil monitoring box is provided with a contamination monitor, a humidity monitor, a temperature monitor, and a viscosity monitor.

[0008] In summary, in order to realize the online monitoring of the lubricating oil status of rail transit gearboxes, it is necessary not only to develop reliable online monitoring equipment for lubricating oil status that does not affect the normal operation of the gearbox, but also to design a matching monitoring strategy based on the operating characteristics of the rail transit gearbox. Summary of the invention

[0009] Based on the above technical problems, the present invention proposes an online monitoring method and monitoring device for multi-gearbox lubricating oil to solve the problems of long monitoring cycle, high monitoring cost, complex oil collection work and manual errors in rail transit gearbox lubricating oil in the prior art.

[0010] To achieve the above object, the present invention provides a method and a device for online monitoring of lubricating oil in multiple gearboxes.

[0011] A method for online monitoring of lubricating oil in multiple gearboxes, characterized in that the method comprises the following steps:

[0012] S1. Collecting multiple gearbox lubricant oil parameter data;

[0013] S2. Transmit data and perform data preprocessing;

[0014] S3. Calculate the average and standard deviation of various oil parameters of multiple gearbox lubricants and set the allowable deviation range;

[0015] S4. Determine whether the values ​​of various oil parameters of each gearbox lubricant exceed the allowable deviation range;

[0016] S5. Increase the collection frequency and monitor again, and finally issue a warning or alarm signal.

[0017] Furthermore, the oil parameters include at least one of viscosity, density, water activity, water content, dielectric constant, metal element content and acid value.

[0018] Furthermore, in step S3, the average value μ and standard deviation σ of at least one oil parameter of multiple gearbox lubricating oils are calculated, and the allowable deviation range of the oil parameter is set according to the average value μ and standard deviation σ of the oil parameter.

[0019] Furthermore, in step S3, the allowable deviation range of the oil parameters is (μ-3σ, μ+3σ).

[0020] Furthermore, in step S4, it is determined whether the value of at least one oil parameter of each gearbox lubricant exceeds the allowable deviation range. If the oil parameters of each gearbox do not exceed the allowable deviation range, the monitoring is terminated; if one of the oil parameters of a gearbox exceeds the allowable deviation range, it is preliminarily determined that the gearbox lubricant is deteriorated, and the next step is performed.

[0021] Furthermore, before step S1, it also includes: obtaining an operating signal of the mechanical device, determining the operating state of the mechanical device, if the mechanical device is in a standby state, obtaining a clock signal of the mechanical device, determining the standby time, and performing collection settings according to the standby time.

[0022] Further, a waiting time and a collection time are set according to the standby time, and the sum of the waiting time and the collection time is not greater than the standby time.

[0023] Furthermore, the waiting time is 10-20 minutes, and the collection time is 5-15 minutes.

[0024] The present invention also proposes a multi-gearbox lubricating oil online monitoring device, which is used to implement the above-mentioned multi-gearbox lubricating oil online monitoring method, comprising a plurality of composite oil sensors, a plurality of connecting wires, a controller and a host computer, wherein the plurality of composite oil sensors are respectively installed on the housings of the plurality of gearboxes, the plurality of composite oil sensors are respectively connected to the controller through the plurality of connecting wires, and the controller is connected to the host computer;

[0025] The composite oil product sensor is used to collect lubricating oil product parameter data;

[0026] The connecting line is used to transmit the collected data;

[0027] The controller is used to obtain signals and perform acquisition settings, and at the same time process and analyze the acquired data to determine the state of the lubricating oil;

[0028] The host computer is used for human-computer interaction.

[0029] Furthermore, the composite oil product sensor is installed at the bottom or side of the gear box body, and the probe of the composite oil product sensor passes into the gear box.

[0030] Furthermore, it also includes a connector, which is a detachable connector.

[0031] Furthermore, the connecting line includes a first cable and a second cable, the first cable connects the tail end of the composite oil sensor and one end of the connector, and the second cable connects the controller and the other end of the connector.

[0032] Furthermore, the controller includes a board and a host box, the board is connected to the connecting line, and the host box is connected to the host computer.

[0033] Furthermore, the board is provided with a data copy interface.

[0034] Furthermore, it also includes a plurality of line cards, and the line cards are used to fix the first cable on the gear box body.

[0035] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0036] 1. The present invention proposes a multi-gearbox lubricating oil online monitoring method and monitoring device, which can realize the online monitoring of lubricating oil products of multiple gearboxes in rail transit at the same time, timely feedback the usage status of the lubricating oil, and greatly improve the monitoring efficiency.

[0037] 2. The present invention proposes an online monitoring method and monitoring device for multi-gearbox lubricating oil. Maintenance personnel do not need to perform visual inspection or extraction inspection on the gearbox lubricating oil, which reduces the economic and labor costs of gearbox operation and maintenance and greatly improves the intelligence of gearbox operation and maintenance.

[0038] 3. The present invention proposes a multi-gearbox lubricating oil online monitoring method and monitoring device. When an oil failure or an oil failure is detected, the lubricating oil is replaced according to the early warning or alarm signal, which can effectively reduce the oil change cost and avoid excessive oil change or untimely oil change.

[0039] 4. The present invention proposes a multi-gearbox lubricating oil online monitoring method and monitoring device, which accumulate a large amount of status data on the actual use of lubricating oil, and provide effective data support for the big data intelligent operation and maintenance of the gearbox and even the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 A flow chart of a method for online monitoring of lubricating oil in multiple gearboxes provided by the present invention;

[0042] Figure 2 A schematic diagram of a multi-gearbox lubricating oil online monitoring device provided by the present invention;

[0043] Figure 3 A partial schematic diagram of a multi-gearbox lubricating oil online monitoring device provided by the present invention. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0046] Example 1

[0047] In order to solve the problems of long monitoring cycle, high monitoring cost, complicated oil collection and manual error in rail transit gearbox lubricating oil in the prior art, the present invention proposes an online monitoring method and monitoring device for lubricating oil in multiple gearboxes.

[0048] To achieve the above purpose, this embodiment proposes a multi-gearbox lubricating oil online monitoring method, which is described by taking a rail transit vehicle as an example. Figure 1 The monitoring method specifically comprises the following steps:

[0049] S1. Collecting multiple gearbox lubricant oil parameter data;

[0050] S2. Transmit data and perform data preprocessing;

[0051] S3. Calculate the average and standard deviation of various oil parameters of multiple gearbox lubricants and set the allowable deviation range;

[0052] S4. Determine whether the values ​​of various oil parameters of each gearbox lubricant exceed the allowable deviation range;

[0053] S5. Increase the collection frequency and monitor again, and finally issue a warning or alarm signal.

[0054] Specifically, in step S1, after the lubricating oil monitoring program is started, a data collection instruction is received to collect various oil parameters of lubricating oil in multiple gearboxes, and the collected oil parameters include but are not limited to the viscosity, density, water activity, water content, dielectric constant, metal element particles, acid value, etc. of the lubricating oil. The collected oil parameters of different gearboxes are marked to distinguish them.

[0055] In some embodiments, before collecting oil parameter data, it is necessary to determine the running status of the vehicle and perform collection settings, specifically including: after the lubricant monitoring program is started, obtain the vehicle's running signal, if the vehicle is in a running state, continue to obtain the running signal in real time, if the vehicle is in a parked state, obtain the vehicle's clock signal, determine the parking time of the vehicle, perform collection settings based on the parking time, and set the waiting time and collection time. In general, it is preferred to perform online monitoring of lubricant oil when the vehicle is parked for a long time, such as: before driving at the departure station, after parking at the terminal, or after the vehicle is stored.

[0056] The parking time is set to ensure that the lubricating oil is fully cooled and flows back to the bottom of the gearbox, so as to obtain more accurate results. Therefore, the waiting time is set in combination with the parking time. The setting of the collection time needs to be determined according to the amount of data collected, such as the number of gearboxes collected and the number of oil parameters collected, while taking into account the use of the vehicle, the quality and type of lubricating oil, and environmental factors. The sum of the waiting time and the collection time set shall not be greater than the standby time. If the standby time is less than the sum of the minimum waiting time and the minimum collection time, the collection setting will not be performed.

[0057] Optionally, the setting range of the waiting time is 10-20 minutes, and the setting range of the collection time is 5-15 minutes.

[0058] In other embodiments, the online monitoring control program is not connected to the vehicle control system for communication and cannot obtain the vehicle operation signal. In this case, a fixed clock method is used to collect and monitor data at a fixed time every day, or the maintenance personnel manually start the online monitoring program according to actual conditions.

[0059] Specifically, in step S2, the collected oil parameter data is transmitted and preprocessed. Data preprocessing mainly includes eliminating abnormal data, data smoothing, and median data selection. The working environment of the lubricating oil online monitoring device is complex, and is affected by factors such as vehicle operation, sensor characteristics, and lubricating oil instability. The raw data collected by the composite oil sensor may contain abnormal data, which needs to be eliminated and smoothed. In addition, the amount of data obtained by the composite oil sensor during the collection time is large, and data selection is required to perform calculations and judgments in steps S3 and S4. Data preprocessing specifically includes:

[0060] (1) Eliminate abnormal data: When the sensor is powered on, there may be a short reaction time gap. During this gap, the data measured by the sensor is not the real data of the lubricant, but false data, so it needs to be eliminated. The data in this gap has obvious characteristics and is usually the initial value of the sensor. Therefore, the limiting filter method is used for filtering, setting the upper and lower intervals, limiting the amplitude range, and eliminating false data.

[0061] (2) Data smoothing: Due to factors such as oil instability, the data collected by the sensor may contain abnormal data with jumps, and this part of the jump data needs to be smoothed. Use sliding window filtering, with △ as the window width, take the average value of the data in the window, then slide the window for a certain step length, take the average value again, repeat this step, and get the smoothed data sequence.

[0062] (3) Median data selection: The sensor will collect a large amount of data during the collection period, which cannot be compared one by one, so the data needs to be selected. Taking temperature as the benchmark, take the median at every 0.5°C interval, and take the corresponding values ​​of other monitoring parameters at the median temperature to obtain a limited set of data for comparison and judgment in subsequent steps.

[0063] Specifically, in step S3, the average value μ and standard deviation σ of various oil parameters of multiple gearbox lubricants are calculated based on the processed oil parameter data, and the allowable deviation range of each oil parameter is set using the average value μ and standard deviation σ according to the 3σ criterion. For example, the average value of the viscosity of multiple gearbox lubricants is μ 1 , with standard deviation σ 1 , then the allowable deviation range of lubricating oil viscosity is set as (μ 1 -3σ 1 , μ 1 +3σ 1 ). Among them, the average value μ 1 and standard deviation σ 1 The calculation methods are

[0064]

[0065] Where n is the number of gearboxes, η n is the collected value of the lubricating oil viscosity of each gearbox, η i represents the viscosity of the lubricating oil of the i-th gearbox.

[0066] The same method as above can be used to calculate the mean value and standard deviation of other oil parameters and set the corresponding allowable deviation range.

[0067] Specifically, in step S4, it is determined whether the collected values ​​of various oil parameters of each gearbox lubricant exceed the allowable deviation range. If the collected values ​​of various oil parameters of each gearbox lubricant do not exceed the allowable deviation range, the gearbox lubricant status is normal and the monitoring process ends; if one or more lubricant oil parameters of a gearbox exceed the allowable deviation range, it is preliminarily determined that the gearbox lubricant is deteriorated and proceed to the next step.

[0068] Specifically, in step S5, the data collection frequency of the lubricating oil parameters is increased, and multiple lubricating oil monitoring is performed. If it is still determined that the gearbox lubricating oil has deteriorated and failed, the data and analysis results are transmitted and stored, and a warning or alarm signal is issued to remind maintenance personnel to replace the lubricating oil in the gearbox.

[0069] Example 2

[0070] This embodiment proposes an online monitoring device for lubricating oil products in multiple gearboxes, which includes multiple composite oil sensors, multiple connecting wires, multiple connectors, a controller and a host computer. Multiple composite oil sensors are respectively installed on the housings of multiple gearboxes, and the probes of the composite oil sensors are passed into the interior of the gearboxes and immersed below the lubricating oil level. The tail ends of the composite oil sensors are connected to the controller through connecting wires and connectors, and the controller is connected to the host computer. Among them, the composite oil sensor is used to collect lubricating oil product parameter data, the connecting wire is used to transmit the collected data, the controller is used to obtain the operating signal and clock signal for judgment and setting, and at the same time, the collected oil parameter data is preprocessed and analyzed and calculated to judge the state of the lubricating oil, and the host computer is used for human-computer interaction.

[0071] Optionally, the connector is a detachable connector, and the connector includes a male connector and a female connector, and the male connector and the female connector are adaptably connected. The connecting line includes a first cable and a second cable, one end of the first cable is connected to the tail end of the composite oil sensor, and the other end is connected to the male connector or the female connector, one end of the second cable is connected to the female connector or the male connector, and the other end is connected to the controller. The first cable is fixed to the housing of the gearbox through a number of wire clips, and the second cable is fixed by a wiring harness. The monitoring device adopts the above-mentioned detachable connection method to achieve separation during maintenance, which is convenient for maintenance. In addition, the installation of the composite oil sensor, connecting wire and wire clip will not affect the space and limit of the gearbox, there is no need to pump oil or set up additional oil circuits, and it does not affect the performance and structure of the gearbox itself.

[0072] See also Figure 2 As shown, in a specific implementation process, a carriage of a rail transit vehicle has 2 bogies, each bogie is equipped with 2 gearboxes, and there are 4 gearboxes in a carriage. Each gearbox is installed with a composite oil sensor. The 4 composite oil sensors share a controller and are connected to the controller through corresponding connecting lines and connectors. The connectors are installed on the corresponding bogies.

[0073] Specifically, the composite oil sensor is installed at the bottom or side of the gearbox housing to ensure that the sensor probe is immersed below the lubricating oil level inside the gearbox. Figure 3As shown, it is an implementation method of composite oil sensor. The composite oil sensor 10 includes a probe 11 and a protective cover 12 at the front end, a mounting portion 13 in the middle, a connecting portion 14 at the tail end, and an internal electronic component circuit board assembly. Among them, the probe 11 is provided with multiple sensing elements, which can monitor multiple oil parameters. The monitored oil parameters include temperature, viscosity, density, water activity, water content, dielectric constant, metal element particles, acid value, etc., and corresponding sensing elements can be selectively used according to needs. The protective cover 12 is sleeved on the outside of the probe to protect the sensing element on the probe to ensure that the sensing element works stably in the high-speed stirring lubricating oil. The front end and side of the protective cover 12 are provided with multiple small holes. The mounting portion 13 in the middle is an annular flange, and the composite oil sensor is fixedly mounted on the gear box body by bolts. The connecting portion 14 at the tail end is connected to the first cable by a crimping process, which can resist a tensile force of more than 500N and has good waterproof performance and protection level.

[0074] Optionally, the middle mounting portion may also adopt a raised threaded ring, which is fixedly mounted on the gear box body by threaded connection.

[0075] Specifically, a mounting sinker is provided on the gearbox body for mounting the composite oil sensor. The mounting sinker is a cylindrical cube with a through hole in the middle leading to the interior of the gearbox. The probe of the composite oil sensor can be fully contacted with the lubricating oil in the gearbox when inserted into the through hole. The diameter of the through hole is slightly larger than the diameter of the probe of the composite oil sensor. The mounting sinker is located below the lubricating oil level of the gearbox to ensure that the probe of the composite oil sensor can be completely immersed in the lubricating oil after installation. The design of the mounting sinker position has been verified by simulation analysis and experiments to ensure that its strength and performance are not affected, and that the composite oil sensor does not interfere with any components after installation.

[0076] Specifically, the controller is used to realize the power supply, data transmission and processing of the composite oil product sensor. The controller includes a board and a host box. The board is connected to the second cable, and the host box is connected to the host computer. The board and the host box communicate through CAN and Ethernet. The data can be transmitted to the host computer through the host box. At the same time, the host box supplies power to the board, and the board supplies power to the composite oil product sensor. The board has functions such as data acquisition, processing, and storage, and the built-in data processing program can calculate, analyze and judge the various parameter data of the collected oil products.

[0077] Optionally, a data copy interface is provided on the controller board, which can be used by maintenance personnel to copy data without connecting to the host computer system. Data recovery is performed by the maintenance personnel copying data regularly.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0080] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0081] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system.

[0082] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A method for online monitoring of lubricating oil in multiple gearboxes, characterized in that: The method comprises the following steps: S1. Collecting multiple gearbox lubricant oil parameter data; S2. Transmit data and perform data preprocessing; S3. Calculate the average and standard deviation of various oil parameters of multiple gearbox lubricants and set the allowable deviation range; S4. Determine whether the values ​​of various oil parameters of each gearbox lubricant exceed the allowable deviation range; S5. Increase the collection frequency and monitor again, and finally issue a warning or alarm signal.

2. The method for online monitoring of lubricating oil of multiple gearboxes according to claim 1, characterized in that: The oil parameters include at least one of viscosity, density, water activity, water content, dielectric constant, metal element content and acid value.

3. The method for online monitoring of lubricating oil of multiple gearboxes according to claim 1, characterized in that: In step S3, the average value μ and standard deviation σ of at least one oil parameter of a plurality of gearbox lubricating oils are calculated, and the allowable deviation range of the oil parameter is set according to the average value μ and standard deviation σ of the oil parameter.

4. The method for online monitoring of lubricating oil of multiple gearboxes according to claim 3 is characterized in that: In step S3, the allowable deviation range of the oil parameters is (μ-3σ, μ+3σ).

5. The method for online monitoring of lubricating oil of multiple gearboxes according to claim 1, characterized in that: In step S4, it is determined whether the value of at least one oil parameter of each gearbox lubricating oil exceeds the allowable deviation range. If the oil parameters of each gearbox do not exceed the allowable deviation range, the monitoring ends. If one or more oil parameters of a gearbox exceed the allowable deviation range, it is preliminarily determined that the gearbox lubricant has deteriorated and the next step is continued.

6. The method for online monitoring of lubricating oil of multiple gearboxes according to any one of claims 1 to 5, characterized in that: Before step S1, it also includes: obtaining the operation signal of the mechanical equipment, judging the operation status of the mechanical equipment, if the mechanical equipment is in the standby state, obtaining the clock signal of the mechanical equipment, judging the standby time, and performing collection settings according to the standby time.

7. The method for online monitoring of lubricating oil of multiple gearboxes according to claim 6, characterized in that: The waiting time and the collection time are set according to the standby time, and the sum of the waiting time and the collection time is not greater than the standby time.

8. The method for online monitoring of lubricating oil of multiple gearboxes according to claim 7, characterized in that: The waiting time is 10-20 minutes, and the collection time is 5-15 minutes.

9. An online monitoring device for lubricating oil in multiple gearboxes, used to implement the online monitoring method for lubricating oil in multiple gearboxes according to any one of claims 1 to 8, characterized in that: It comprises a plurality of composite oil sensors, a plurality of connecting wires, a controller and a host computer, wherein the plurality of composite oil sensors are respectively installed on the housings of a plurality of gear boxes, the plurality of composite oil sensors are respectively connected to the controller through the plurality of connecting wires, and the controller is connected to the host computer; The composite oil product sensor is used to collect lubricating oil product parameter data; The connecting line is used to transmit the collected data; The controller is used to obtain signals and perform acquisition settings, and at the same time process and analyze the acquired data to determine the state of the lubricating oil; The host computer is used for human-computer interaction.

10. The multi-gearbox lubricating oil online monitoring device according to claim 9, characterized in that: The composite oil product sensor is installed at the bottom or side of the gear box body, and the probe of the composite oil product sensor passes into the gear box and is immersed below the lubricating oil level.

11. The multi-gearbox lubricating oil online monitoring device according to claim 9, characterized in that: Also included is a connector, which is a breakaway connector.

12. The multi-gearbox lubricating oil online monitoring device according to claim 11, characterized in that: The connecting line includes a first cable and a second cable, the first cable connects the tail end of the composite oil sensor and one end of the connector, and the second cable connects the controller and the other end of the connector.

13. The multi-gearbox lubricating oil online monitoring device according to claim 9, characterized in that: The controller includes a board and a host box, the board is connected to the connecting line, and the host box is connected to the host computer.

14. The multi-gearbox lubricating oil online monitoring device according to claim 13, characterized in that: The board is provided with a data copy interface.

15. The multi-gearbox lubricating oil online monitoring device according to claim 12, characterized in that: It also includes a plurality of line cards, and the line cards are used to fix the first cable on the gear box body.

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