How to monitor the lubricating oil in a vacuum pump

Abstract

A method for monitoring the lubricating oil in a vacuum pump, applied to a controller in a monitoring system that monitors the lubricating oil in the vacuum pump, wherein the monitoring system includes an oil quality sensor, an ultrasonic liquid level sensor, a display device, and a controller, and the monitoring method includes the steps of: receiving a first signal emitted by the oil quality sensor, transmitting a first display drive signal to the display device based on dielectric constant information of the lubricating oil contained in the first signal, and driving the display device to display the corresponding dielectric constant of the lubricating oil; and receiving a second signal emitted by the ultrasonic liquid level sensor, transmitting a second display drive signal to the display device based on liquid level information of the lubricating oil contained in the second signal, and driving the display device to display the corresponding liquid level of the lubricating oil. The method for monitoring the lubricating oil in a vacuum pump can monitor the state of the lubricating oil in the vacuum pump in real time and accurately, and display it intuitively, thereby improving the accuracy of determining the operating state of the vacuum pump.

Description

Technical Field

[0001] "Cross-reference to Related Applications" This application claims the priority of a Chinese patent application with an application number of 202310450082.9 and an invention title of "Method for Monitoring Lubricating Oil of Vacuum Pump", which was filed with the China National Intellectual Property Administration on April 24, 2023, and incorporates the entire content by reference into this application.

[0002] This application relates to the technical field of vacuum pumps, and particularly to a method for monitoring the lubricating oil of vacuum pumps.

Background Art

[0003] A vacuum pump refers to a component or device that uses mechanical, physical, chemical, or physical-chemical methods to evacuate air from a container to create a vacuum state. That is, a vacuum pump is a device that uses various methods to improve, generate, or maintain a vacuum state in a sealed space. The rotor in the chamber rotates to cause a change in volume, thereby discharging gas from the pump. Mainly, during the intake process, the volume of the intake chamber increases, the degree of vacuum decreases, and the gas in the container is sucked into the chamber. During the exhaust process, the volume decreases, the pressure increases, and finally the sucked gas is discharged from the pump.

[0004] Inside the body of a vacuum pump, there are usually movable connection structures such as bearings. In order to ensure that these movable connection structures can operate normally (rotate, slide, etc.) in the vacuum pump, generally, it is necessary to use the lubricating oil stored in the end cover of the vacuum pump body for lubrication.

[0005] To monitor the condition and remaining amount of lubricating oil, existing technologies typically involve installing an observation window on the end cover of the vacuum pump and manually monitoring the lubricating oil inside the vacuum pump. Conventional monitoring methods are difficult to implement, require significant manual labor, and cannot collect oil level data in real time. Therefore, it is not possible to detect the oil quality of the lubricating oil in real time. Manual monitoring also involves a certain delay, making it impossible to determine the condition of the lubricating oil inside the vacuum pump in a timely and accurate manner. [Overview of the project] [Problems that the invention aims to solve]

[0006] The primary objective of the embodiments of this invention is to provide a method for monitoring the lubricating oil in a vacuum pump in order to alleviate the technical problems of existing technologies, namely that manual monitoring of the state of the lubricating oil in a vacuum pump is inaccurate. [Means for solving the problem]

[0007] The technical solution of this application is as follows: In a first embodiment, an embodiment of the present application is a method for monitoring lubricating oil of a vacuum pump for monitoring lubricating oil stored in the body of the vacuum pump, and is applied to a controller in a monitoring system that monitors lubricating oil in the vacuum pump, the monitoring system is An oil quality sensor provided within the main body, wherein the detection end of the oil quality sensor is in contact with the lubricating oil stored within the main body, the oil quality sensor monitors the dielectric constant of the lubricating oil in the vacuum pump, and outputs a first signal having information on the dielectric constant of the lubricating oil. An ultrasonic liquid level sensor provided on the outer wall of the vacuum pump, wherein the ultrasonic sensor monitors the liquid level of the lubricating oil inside the vacuum pump and outputs a second signal having information about the liquid level of the lubricating oil, A controller, which is connected to the oil quality sensor and also to the ultrasonic liquid level sensor, Includes a display device connected to the controller, which receives a display drive signal emitted by the controller and displays corresponding information, The method for monitoring the lubricating oil of a vacuum pump is, The steps include receiving the first signal, transmitting a first display drive signal to the display device based on the dielectric constant information of the lubricating oil contained in the first signal, and driving the display device to display the dielectric constant of the corresponding lubricating oil, The present invention provides a method comprising the steps of receiving the second signal, transmitting a second display drive signal to the display device based on the lubricating oil level information contained in the second signal, and driving the display device to display the corresponding lubricating oil level.

[0008] Furthermore, the method for monitoring the lubricating oil of a vacuum pump further includes an alarm device connected to the controller, and the method for monitoring the lubricating oil of a vacuum pump is The steps include processing the dielectric constant information of the lubricating oil contained in the first signal, and determining whether to transmit the first alarm signal to the alarm device based on the processing result, The process further includes processing the lubricating oil level information contained in the second signal and determining whether to transmit a second alarm signal to the alarm device based on the processing result, The alarm device receives the first alarm signal and / or the second alarm signal emitted by the controller and issues an alarm.

[0009] Furthermore, the step of processing the dielectric constant information of the lubricating oil included in the first signal and determining whether to transmit an alarm signal to the alarm device based on the processing result is as follows: A step of obtaining the dielectric constant of the lubricating oil monitored by the oil quality sensor based on the dielectric constant information of the lubricating oil contained in the first signal, The steps include: comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with a preset standard dielectric constant range to obtain a determination result; If the dielectric constant of the lubricating oil monitored by the oil quality sensor is determined to be within the standard dielectric constant range, the step of not transmitting the first alarm signal to the alarm device, The step of transmitting the first alarm signal to the alarm device when it is determined that the dielectric constant of the lubricating oil monitored by the oil quality sensor is not within the standard dielectric constant range.

[0010] Furthermore, the step of comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with a preset standard dielectric constant and obtaining a determination result is as follows: The steps include comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with the standard dielectric constant, If the dielectric constant of the lubricating oil monitored by the oil quality sensor is greater than the standard dielectric constant, the step is to determine that the dielectric constant of the lubricating oil monitored by the oil quality sensor is not within the standard dielectric constant range. The method includes the step of determining that if the dielectric constant of the lubricating oil monitored by the oil quality sensor is smaller than the standard dielectric constant, then the dielectric constant of the lubricating oil monitored by the oil quality sensor is within the standard dielectric constant range.

[0011] Furthermore, the step of processing the lubricating oil level information included in the second signal and determining whether to transmit a second alarm signal to the alarm device based on the processing result is as follows: The steps include: obtaining the lubricating oil level height monitored by the ultrasonic liquid level sensor based on the lubricating oil level height information contained in the second signal; The steps include comparing the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with a preset standard liquid level range and obtaining a determination result, The step of not transmitting a second alarm signal to the alarm device when it is determined that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is within the standard liquid level range, The method includes the step of transmitting a second alarm signal to the alarm device when it is determined that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is not within the standard liquid level range.

[0012] Furthermore, the standard liquid level range is a threshold range formed by a first liquid level and a second liquid level, where the first liquid level is smaller than the second liquid level. The step of comparing the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with a preset standard liquid level range and obtaining a determination result is as follows: The steps include comparing the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with a first liquid level, If the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is lower than the first liquid level, the step of determining that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is not within the standard liquid level range, If the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than the first liquid level, the step is to compare the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with the second liquid level, If the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than the second liquid level, the step of determining that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is not within the standard liquid level range, The method includes the step of determining that if the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than the first liquid level and lower than the second liquid level, then the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is within the standard liquid level range.

[0013] Furthermore, the oil quality sensor further monitors the water content of the lubricating oil in the vacuum pump and outputs the first signal having information on the water content of the lubricating oil in the vacuum pump, and the method for monitoring the lubricating oil in the vacuum pump is as follows: Based on the water content rate of the lubricating oil contained in the first signal, transmit the third display drive signal to the display device, and drive the display device to display the corresponding water content rate of the lubricating oil based on the received third display drive signal; processing the water content rate information of the lubricating oil contained in the first signal, and determining whether to transmit a first alarm signal to the alarm device based on the processing result.

[0014] Furthermore, the step of processing the water content rate information of the lubricating oil contained in the first signal and determining whether to transmit a first alarm signal to the alarm device based on the processing result is as follows: obtaining the water content rate of the lubricating oil monitored by the oil quality sensor based on the water content rate information of the lubricating oil contained in the first signal; comparing the water content rate of the lubricating oil monitored by the oil quality sensor with a preset standard water content rate range to obtain a determination result; when it is determined that the water content rate of the lubricating oil monitored by the oil quality sensor is within the standard water content rate range, not transmitting the first alarm signal to the alarm device; when it is determined that the water content rate of the lubricating oil monitored by the oil quality sensor is not within the standard water content rate range, transmitting the first alarm signal to the alarm device.

[0015] Furthermore, the method for monitoring the lubricating oil of the vacuum pump is as follows: when transmitting the first alarm signal to the alarm device, simultaneously transmit a first abnormal display signal to the display device, and drive the display device to display that the state of the lubricating oil is abnormal; when transmitting a second alarm signal to the alarm device, simultaneously transmit a second abnormal display signal to the display device, and drive the display device to display that the liquid level of the lubricating oil is abnormal.

[0016] Furthermore, the method for monitoring the lubricating oil of the vacuum pump is as follows: Controlling the oil quality sensor to monitor the lubricating oil in the vacuum pump at a first preset time interval and obtaining the first signal; Further including: controlling the ultrasonic liquid level sensor to measure the liquid level of the lubricating oil in the vacuum pump at a second preset time interval and obtaining the second signal.

Advantages of the Invention

[0017] The beneficial effects of the present application are as follows. By providing an oil quality sensor, the dielectric constant of the lubricating oil in the main body of the vacuum pump is monitored in real time, and the dielectric constant of the lubricating oil in the vacuum pump is displayed in real time by the controller and the display device. Since the dielectric constant of the lubricating oil can reflect the contamination degree of the lubricating oil, by monitoring and displaying the dielectric constant of the lubricating oil in real time, the contamination degree of the lubricating oil in the vacuum pump can be monitored in real time. In addition, by providing an ultrasonic liquid level sensor, the liquid level of the lubricating oil in the main body of the vacuum pump can be monitored in real time, and the liquid level of the lubricating oil in the vacuum pump is displayed in real time by the controller and the display device. Compared with the existing technology of providing an observation window on the vacuum pump and monitoring manually, the method for monitoring the lubricating oil of the vacuum pump provided by the present invention can monitor and display the contamination degree and liquid level of the lubricating oil in the vacuum pump accurately and in real time, and can intuitively and accurately display them, and can improve the accuracy of judging the operating state of the vacuum pump.

[0018] Hereinafter, specific embodiments of the present application will be described in detail with reference to the drawings, so that the technical solution of the present application and its beneficial effects will become clear.

Brief Description of the Drawings

[0019] [Figure 1] It is a block diagram of the configuration of a monitoring system according to an embodiment of the present invention. [Figure 2] Based on the first signal processing structure according to an embodiment of the present invention, it is a schematic diagram of the step of determining whether to issue a warning. [Figure 3] This is a schematic diagram of the step of determining whether to issue a warning based on a second signal processing structure according to one embodiment of the present invention. [Modes for carrying out the invention]

[0020] The specific configurations and functional details disclosed herein are merely representative and are intended to describe exemplary embodiments of the present application. However, the present application can be concretely realized in many alternative forms and should not be construed as being limited only to the embodiments described herein.

[0021] In the description of this application, directions or positional relationships indicated by terms such as “center,” “horizontal,” “top,” “bottom,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside” are based on the directions or positional relationships shown in the drawings and are used to simplify the description of this application. However, it should be understood that these do not indicate or suggest that the devices or elements covered must necessarily be located in a specific direction, or configured and operated in a specific direction, and therefore should not be understood as limitations on this application. Furthermore, the terms “first” and “second” are used merely for descriptive purposes and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features covered. Thus, features limited by “first” and “second” may explicitly or implicitly include one or more such features. In the description of this application, unless otherwise specified, “multiple” means two or more. Also, the term “includes” and any variation thereof are intended to cover non-exclusive inclusion.

[0022] In the description of this application, unless otherwise clearly specified or limited, the terms “attach,” “connect,” and “join” should be understood broadly, for example, meaning that connections may be supported, detachably connected, or integrally connected. Connections may be mechanical or electrical. Connections may be direct, indirectly connected via an intermediary, or two elements may be in internal communication. A person skilled in the art will be able to understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0023] The terminology used herein is solely for the purpose of describing specific embodiments and is not intended to limit the exemplary embodiments. Unless otherwise explicitly stated in the context, the singular forms "one" and "one" used herein are also intended to include plural cases. Furthermore, the terms "include" and / or "contain" used herein indicate the presence of the described features, integers, steps, operations, units, and / or components, but should be understood not to exclude the existence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0024] The present application will be further described below with reference to the drawings and embodiments.

[0025] As shown in Figure 1, an embodiment of the present invention provides a method for monitoring lubricating oil in a vacuum pump for monitoring the lubricating oil stored in the body of the vacuum pump, the method being applied to a controller in a monitoring system for monitoring the lubricating oil in the vacuum pump, the monitoring system including an oil quality sensor, an ultrasonic liquid level sensor, a controller, and a display device.

[0026] The oil quality sensor is located inside the main unit, and its detection end contacts the lubricating oil stored inside the main unit. The oil quality sensor monitors the dielectric constant of the lubricating oil in the vacuum pump and outputs a first signal containing information about the dielectric constant of the lubricating oil.

[0027] An ultrasonic liquid level sensor is installed on the outer wall of the vacuum pump. The ultrasonic sensor monitors the liquid level of the lubricating oil inside the vacuum pump and outputs a second signal containing information about the liquid level of the lubricating oil.

[0028] The controller is connected to the oil level sensor and receives or acquires a first signal, and the controller is also connected to the ultrasonic liquid level sensor and receives or acquires a second signal.

[0029] The display device is connected to the controller and receives display drive signals from the controller to display the corresponding information.

[0030] The method for monitoring the lubricating oil of a vacuum pump is, The steps include receiving the first signal, transmitting a first display drive signal to the display device based on the dielectric constant information of the lubricating oil contained in the first signal, and driving the display device to display the dielectric constant of the corresponding lubricating oil, The process includes receiving the second signal, transmitting a second display drive signal to the display device based on the lubricating oil level information contained in the second signal, and driving the display device to display the corresponding lubricating oil level.

[0031] Specifically, the controller transmits a first display drive signal to the display device based on the dielectric constant information of the lubricating oil contained in the first signal, and the display device displays the corresponding dielectric constant of the lubricating oil based on the received first display drive signal. The controller transmits a second display drive signal to the display device based on the liquid level information of the lubricating oil contained in the second signal, and the display device displays the corresponding liquid level of the lubricating oil based on the received second display drive signal.

[0032] The first signal may include not only dielectric constant information of the lubricating oil, but also other state information of the lubricating oil, such as temperature and water content.

[0033] It should be explained that the oil quality sensor is installed inside the vacuum pump body, and its detection end is located at least at the lower limit of the vacuum pump's lubricating oil level, thereby ensuring that the dielectric constant of the vacuum pump's lubricating oil can be monitored when the vacuum pump's lubricating oil is in a normal state.

[0034] Furthermore, the ultrasonic liquid level sensor is installed directly above or below the liquid level of the lubricating oil, thereby enabling the acquisition of accurate liquid level information.

[0035] The display device may be a device such as a display screen connected to the controller, and the controller may be a single-chip microcomputer or computer connected to the ultrasonic liquid level sensor and the oil quality sensor.

[0036] It should be added that the lower limit of the lubricating oil level is the minimum level of lubricating oil required to ensure that the vacuum pump operates correctly.

[0037] Therefore, by providing an oil quality sensor, the dielectric constant of the lubricating oil inside the vacuum pump body can be monitored in real time, and the dielectric constant of the lubricating oil inside the vacuum pump can be displayed in real time by the controller and display device. Since the dielectric constant of the lubricating oil reflects the degree of contamination of the lubricating oil, it can be understood that by monitoring and displaying the dielectric constant of the lubricating oil in real time, the degree of contamination of the lubricating oil inside the vacuum pump can be monitored in real time. Furthermore, by providing an ultrasonic liquid level sensor, the liquid level of the lubricating oil inside the vacuum pump can be monitored in real time, and the liquid level of the lubricating oil inside the vacuum pump can be displayed in real time by the controller and display device. Compared to existing technologies that provide an observation window in the vacuum pump and monitor it manually, the method for monitoring the lubricating oil of a vacuum pump provided by the present invention can monitor the degree of contamination and liquid level of the lubricating oil inside the vacuum pump in real time and accurately, and display it intuitively, thereby improving the accuracy of judging the operating status of the vacuum pump.

[0038] Furthermore, by monitoring the lubricating oil inside the vacuum pump in real time, it is possible to avoid emergencies during operation by systematically replacing the lubricating oil or performing scheduled checks.

[0039] In some embodiments, the above monitoring system further includes an alarm device connected to a controller, and a method for monitoring the lubricating oil of a vacuum pump is, The steps include processing the dielectric constant information of the lubricating oil contained in the first signal, and determining whether to transmit the first alarm signal to the alarm device based on the processing result, The process further includes processing the lubricating oil level information contained in the second signal and determining whether to transmit a second alarm signal to the alarm device based on the processing result, The alarm device receives the first alarm signal and / or the second alarm signal emitted by the controller and issues an alarm.

[0040] It should be explained that the decision result obtained by processing the first signal may be to issue an alarm or not to issue an alarm. If the processing result is to issue an alarm, the controller sends the first alarm signal to the alarm device to issue an alarm. If the processing result is not to issue an alarm, the controller does not send any signal to the alarm device.

[0041] Similarly, the decision result obtained from processing the second signal may be to issue an alarm or not to issue an alarm. If the processing result is to issue an alarm, the controller sends a second alarm signal to the alarm device to issue an alarm. If the processing result is not to issue an alarm, the controller does not send any signal to the alarm device.

[0042] It should be explained that the alarm device may be either a whistle-type alarm device or a light alarm device, and it is an alarm device that can be noticed through at least one of sight or hearing.

[0043] As shown in Figure 2, in some embodiments, the step of processing the dielectric constant information of the lubricating oil contained in the first signal and determining whether to send an alarm signal to the alarm device based on the processing result is as follows: The steps include: obtaining the dielectric constant of the lubricating oil monitored by an oil quality sensor based on the dielectric constant information of the lubricating oil contained in the first signal; The steps include: comparing the dielectric constant of the lubricating oil, monitored by an oil quality sensor, with a preset standard dielectric constant range to obtain a determination result; If the dielectric constant of the lubricating oil monitored by the oil quality sensor is determined to be within the standard dielectric constant range, the alarm device will not transmit a first alarm signal. The procedure includes the step of transmitting a first alarm signal to an alarm device when it is determined by an oil quality sensor that the dielectric constant of the lubricating oil is not within a standard dielectric constant range.

[0044] In some embodiments, the step of comparing the dielectric constant of the lubricating oil monitored by an oil quality sensor with a preset standard dielectric constant and obtaining a determination result is: The steps include comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with the standard dielectric constant, If the dielectric constant of the lubricating oil monitored by the oil quality sensor is greater than the standard dielectric constant, the step is to determine that the dielectric constant of the lubricating oil monitored by the oil quality sensor is not within the standard dielectric constant range. The method includes the step of determining that the dielectric constant of the lubricating oil monitored by the oil quality sensor is within the standard dielectric constant range, if the dielectric constant of the lubricating oil monitored by the oil quality sensor is smaller than the standard dielectric constant.

[0045] Specifically, the standard dielectric constant is set at 4.0. Generally, acceptable lubricants have a dielectric constant of 2.0. However, if water or iron powder is present, the relative dielectric constant of the lubricant increases. Therefore, if the dielectric constant is measured to be greater than 4.0, it can be determined that the degree of contamination of the lubricant exceeds the standard and that it needs to be replaced.

[0046] As shown in Figure 3, in some embodiments, the step of processing the lubricating oil level information included in the second signal and determining whether to send a second alarm signal to the alarm device based on the processing result is as follows: The steps include: obtaining the lubricating oil level, monitored by an ultrasonic liquid level sensor, based on the lubricating oil level information contained in the second signal; The steps include: comparing the liquid level of the lubricating oil, monitored by an ultrasonic liquid level sensor, with a preset standard liquid level range to obtain a determination result; The steps include: not sending a second alarm signal to the alarm device when it is determined that the lubricating oil level, as monitored by the ultrasonic liquid level sensor, is within the standard liquid level range; The procedure includes the step of transmitting a second alarm signal to an alarm device if it is determined that the lubricating oil level, as monitored by an ultrasonic liquid level sensor, is not within a standard liquid level range.

[0047] In some embodiments, the standard liquid level range is a threshold range formed by a first liquid level and a second liquid level, where the first liquid level is smaller than the second liquid level. The step of comparing the liquid level height of the lubricating oil, monitored by an ultrasonic liquid level sensor, with a preset standard liquid level height range and obtaining a determination result is as follows: A step of comparing the liquid level height of the lubricating oil monitored by an ultrasonic liquid level sensor with a first liquid level height, If the lubricating oil level monitored by the ultrasonic liquid level sensor is lower than the first liquid level, the step is to determine that the lubricating oil level monitored by the ultrasonic liquid level sensor is not within the standard liquid level range. If the lubricating oil level monitored by the ultrasonic liquid level sensor is higher than the first liquid level, the step is to compare the lubricating oil level monitored by the ultrasonic liquid level sensor with the second liquid level, If the lubricating oil level monitored by the ultrasonic liquid level sensor is higher than the second liquid level, the step is to determine that the lubricating oil level monitored by the ultrasonic liquid level sensor is not within the standard liquid level range. The method includes the step of determining that the lubricating oil level monitored by the ultrasonic liquid level sensor is within the standard liquid level range if the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than a first liquid level and lower than a second liquid level.

[0048] Specifically, the first liquid level is the maximum allowable level of lubricating oil when the vacuum pump is operating normally, and the second liquid level is the minimum allowable level of lubricating oil when the vacuum pump is operating normally. Therefore, in order to ensure that the vacuum pump operates normally, it is necessary to monitor the level of lubricating oil in the vacuum pump in real time and ensure that it is located between the two values.

[0049] In some embodiments, the oil quality sensor further monitors the water content of the lubricating oil in the vacuum pump and outputs a first signal containing information on the water content of the lubricating oil in the vacuum pump, and the method for monitoring the lubricating oil of the vacuum pump according to the above embodiments is as follows: The steps include: transmitting a third display drive signal to a display device based on the water content of the lubricating oil contained in the first signal, and driving the display device to display the corresponding water content of the lubricating oil based on the received third display drive signal; The process further includes processing the water content information of the lubricating oil contained in the first signal, and determining whether to transmit the first alarm signal to the alarm device based on the processing result.

[0050] In some embodiments, the step of processing the water content of the lubricating oil contained in the first signal and determining whether to send the first alarm signal to the alarm device based on the processing result is: The steps include obtaining the water content of the lubricating oil monitored by an oil quality sensor based on the water content information of the lubricating oil contained in the first signal, The steps include: comparing the water content of the lubricating oil, monitored by an oil quality sensor, with a preset standard water content range to obtain a determination result; If the moisture content of the lubricating oil monitored by the oil quality sensor is determined to be within the standard moisture content range, the alarm device will not send a first alarm signal. The procedure includes the step of transmitting a first alarm signal to an alarm device if it is determined that the moisture content of the lubricating oil monitored by the oil quality sensor is not within a standard moisture content range.

[0051] In some embodiments, the step of comparing the water content of the lubricating oil monitored by an oil quality sensor with a preset standard water content range and obtaining a determination result is: A step of comparing the water content of the lubricating oil monitored by an oil quality sensor with a first water content, If the water content of the lubricating oil monitored by the oil quality sensor is less than the first water content, the step is to determine that the water content of the lubricating oil monitored by the oil quality sensor is within the standard water content range. The method includes the step of determining that if the moisture content of the lubricating oil monitored by the oil quality sensor is greater than a first moisture content, then the moisture content of the lubricating oil monitored by the oil quality sensor is not within the standard moisture content range.

[0052] Specifically, generally, the first moisture content is set to 4%, and when the oil quality sensor monitors that the moisture content of the lubricating oil in the vacuum pump is greater than 4%, the controller sends a first alarm signal to the alarm device to alert it to the abnormality of the lubricating oil.

[0053] In some embodiments, the method for monitoring the lubricating oil of the vacuum pump according to the above embodiment is: The steps include transmitting a first alarm signal to the alarm device and, at the same time, transmitting a first abnormality display signal to the display device, driving the display device to display that the lubricating oil condition is abnormal, The further step includes transmitting a second alarm signal to an alarm device and, at the same time, transmitting a second abnormality display signal to a display device, driving the display device to display that the lubricating oil level is abnormal.

[0054] The controller, upon determining that the lubricating oil condition or level is abnormal, simultaneously displays the abnormal information on the display device. This allows the observer or control center to detect the vacuum pump malfunction in a timely manner and perform troubleshooting.

[0055] The method by which the abnormality indicator signal of the display device is displayed may be by displaying it in a different color than the display of a normal liquid level or the display of a normal lubricating oil condition, or by displaying it at a different flashing frequency than the display of a normal liquid level or the display of a normal lubricating oil condition.

[0056] For example, when the display device shows liquid level information in a normal state, it will display it with green numbers, and when the display device shows liquid level information in an abnormal state, it will display it with red numbers.

[0057] For example, when the display device shows liquid level information in a normal state, it is displayed as a green number and the green number does not blink. When the display device shows liquid level information in an abnormal state, it is displayed as a red number and blinks once every two seconds.

[0058] In some embodiments, the method for monitoring the lubricating oil of the vacuum pump according to the above embodiment is: The steps include controlling the oil quality sensor to monitor the lubricating oil in the vacuum pump at a first preset time interval and acquiring a first signal, The method further includes controlling an ultrasonic liquid level sensor to measure the liquid level of lubricating oil in a vacuum pump at a second preset time interval and acquiring a second signal.

[0059] Monitoring the condition of the vacuum pump's lubricant at pre-set intervals not only reduces energy consumption compared to real-time monitoring over extended periods, but also allows for more accurate monitoring of the vacuum pump's lubricant condition.

[0060] In some embodiments, the oil quality sensor further monitors the kinematic viscosity, density, resistance, and temperature of the lubricating oil in the vacuum pump, outputs the first signal having the kinematic viscosity, density, resistance, and temperature information of the lubricating oil, and the method for monitoring the lubricating oil in the vacuum pump is as follows: The further step includes transmitting a fourth display drive signal to a display device based on lubricant parameter information contained in the first signal, and driving the display device to display the corresponding kinematic viscosity of the lubricant, density of the lubricant, resistance of the lubricant, and temperature of the lubricant based on the received fourth display drive signal.

[0061] By monitoring the dielectric constant, water content, kinematic viscosity, density, resistance, and temperature of the lubricating oil using an oil quality sensor and displaying this information on a display device, it is possible to intuitively and accurately reflect the condition of the lubricating oil in a vacuum pump, thereby enabling planned maintenance of the vacuum pump.

[0062] The above-described embodiments are optional examples of the present invention and do not limit the scope of protection of the present invention. Any equivalent structural modifications using the contents of this specification and drawings, or any other direct or indirect use in the relevant technical field, without departing from the spirit of the present invention, are all included within the scope of patent protection of the present invention.

Claims

1. A method for monitoring the lubricating oil stored inside the body of a vacuum pump, This applies to a controller in a monitoring system that monitors the lubricating oil in a vacuum pump, and the monitoring system is An oil quality sensor provided within the main body, wherein the detection end of the oil quality sensor is in contact with the lubricating oil stored within the main body, the oil quality sensor monitors the dielectric constant of the lubricating oil in the vacuum pump, and outputs a first signal having information on the dielectric constant of the lubricating oil. An ultrasonic liquid level sensor provided on the outer wall of the vacuum pump, wherein the ultrasonic sensor monitors the liquid level of the lubricating oil inside the vacuum pump and outputs a second signal having information about the liquid level of the lubricating oil, A controller, which is connected to the oil quality sensor and also to the ultrasonic liquid level sensor, A display device connected to the controller, which receives a display drive signal emitted by the controller and displays corresponding information, The method for monitoring the lubricating oil of a vacuum pump is, The steps include receiving the first signal, transmitting a first display drive signal to the display device based on the dielectric constant information of the lubricating oil contained in the first signal, and driving the display device to display the dielectric constant of the corresponding lubricating oil, The process includes receiving the second signal, transmitting a second display drive signal to the display device based on the lubricating oil level information contained in the second signal, and driving the display device to display the corresponding lubricating oil level. How to monitor the lubricating oil in a vacuum pump.

2. The monitoring system further includes an alarm device connected to the controller, and the method for monitoring the lubricating oil of the vacuum pump is The steps include processing the dielectric constant information of the lubricating oil contained in the first signal, and determining whether to transmit the first alarm signal to the alarm device based on the processing result, The process further includes processing the lubricating oil level information contained in the second signal and determining whether to transmit a second alarm signal to the alarm device based on the processing result, The method for monitoring the lubricating oil of a vacuum pump according to claim 1, wherein the alarm device receives the first alarm signal and / or the second alarm signal emitted by the controller and issues an alarm.

3. The step of processing the dielectric constant information of the lubricating oil included in the first signal and determining whether to transmit an alarm signal to the alarm device based on the processing result is as follows: A step of obtaining the dielectric constant of the lubricating oil monitored by the oil quality sensor based on the dielectric constant information of the lubricating oil contained in the first signal, The steps include: comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with a preset standard dielectric constant range to obtain a determination result; If the dielectric constant of the lubricating oil monitored by the oil quality sensor is determined to be within the standard dielectric constant range, the first alarm signal is not transmitted to the alarm device. A method for monitoring the lubricating oil of a vacuum pump according to claim 2, comprising the step of transmitting the first alarm signal to the alarm device when it is determined that the dielectric constant of the lubricating oil monitored by the oil quality sensor is not within the standard dielectric constant range.

4. The step of comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with a preset standard dielectric constant and obtaining a determination result is: The steps include comparing the dielectric constant of the lubricating oil monitored by the oil quality sensor with a standard dielectric constant, If the dielectric constant of the lubricating oil monitored by the oil quality sensor is greater than the standard dielectric constant, the step is to determine that the dielectric constant of the lubricating oil monitored by the oil quality sensor is not within the standard dielectric constant range. A method for monitoring the lubricating oil of a vacuum pump according to claim 3, comprising the step of determining that if the dielectric constant of the lubricating oil monitored by the oil quality sensor is less than the standard dielectric constant, the dielectric constant of the lubricating oil monitored by the oil quality sensor is within the standard dielectric constant range.

5. The step of processing the lubricating oil level information included in the second signal and determining whether to transmit the second alarm signal to the alarm device based on the processing result is as follows: The steps include: obtaining the lubricating oil level height monitored by the ultrasonic liquid level sensor based on the lubricating oil level height information contained in the second signal; The steps include: comparing the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with a preset standard liquid level range and obtaining a determination result; The step of not transmitting a second alarm signal to the alarm device when it is determined that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is within the standard liquid level range, A method for monitoring lubricating oil in a vacuum pump according to claim 2, comprising the step of transmitting a second alarm signal to the alarm device when it is determined that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is not within the standard liquid level range.

6. The standard liquid level range is a threshold range formed by a first liquid level and a second liquid level, where the first liquid level is smaller than the second liquid level. The step of comparing the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with a preset standard liquid level range and obtaining a determination result is as follows: The steps include comparing the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with a first liquid level, If the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is lower than the first liquid level, the step of determining that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is not within the standard liquid level range, If the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than the first liquid level, the step is to compare the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor with the second liquid level, If the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than the second liquid level, the step of determining that the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is not within the standard liquid level range, A method for monitoring lubricating oil in a vacuum pump according to claim 5, comprising the step of determining that if the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is higher than the first liquid level and lower than the second liquid level, the liquid level of the lubricating oil monitored by the ultrasonic liquid level sensor is within the standard liquid level range.

7. The oil quality sensor further monitors the water content of the lubricating oil in the vacuum pump and outputs the first signal having information on the water content of the lubricating oil in the vacuum pump, and the method for monitoring the lubricating oil in the vacuum pump is as follows: The steps include: transmitting a third display drive signal to the display device based on the water content of the lubricating oil contained in the first signal, and driving the display device to display the corresponding water content of the lubricating oil based on the received third display drive signal; A method for monitoring the lubricating oil of a vacuum pump according to claim 2, further comprising the steps of processing the water content information of the lubricating oil contained in the first signal and determining whether to transmit a first alarm signal to the alarm device based on the processing result.

8. The step of processing the water content information of the lubricating oil included in the first signal and determining whether to transmit the first alarm signal to the alarm device based on the processing result is as follows: A step of obtaining the water content of the lubricating oil monitored by the oil quality sensor based on the water content information of the lubricating oil contained in the first signal, The steps include: comparing the water content of the lubricating oil monitored by the oil quality sensor with a preset standard water content range to obtain a determination result; If the water content of the lubricating oil monitored by the oil quality sensor is determined to be within the standard water content range, the step of not transmitting the first alarm signal to the alarm device, A method for monitoring the lubricating oil of a vacuum pump according to claim 7, comprising the step of transmitting the first alarm signal to the alarm device when it is determined that the water content of the lubricating oil monitored by the oil quality sensor is not within the standard water content range.

9. The method for monitoring the lubricating oil of a vacuum pump is, The steps include transmitting a first alarm signal to the alarm device and, at the same time, transmitting a first abnormality display signal to the display device, driving the display device to display that the lubricating oil condition is abnormal, A method for monitoring the lubricating oil of a vacuum pump according to any one of claims 2 to 8, further comprising the steps of transmitting a second alarm signal to the alarm device and simultaneously transmitting a second abnormality display signal to the display device, thereby driving the display device to display that the lubricating oil level is abnormal.

10. The method for monitoring the lubricating oil of a vacuum pump is, The steps include controlling the oil quality sensor to monitor the lubricating oil in the vacuum pump at a first preset time interval and acquiring the first signal, A method for monitoring lubricating oil in a vacuum pump according to claim 9, further comprising the steps of controlling the ultrasonic liquid level sensor to measure the liquid level of lubricating oil in the vacuum pump at a second preset time interval and acquiring the second signal.

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