A nuclear power circulating water pump gear box lubricating oil monitoring device

Abstract

The utility model relates to lubricating oil detection technical field especially relates to a nuclear power circulating water pump's gear box lubricating oil monitoring devices, the monitoring device includes the casing and sets up in the oil pumping monitoring mechanism and oil supply monitoring mechanism of casing, oil supply monitoring mechanism with oil supply pipe intercommunication, oil pumping monitoring mechanism with oil pumping pipe intercommunication, oil supply monitoring mechanism and oil pumping monitoring mechanism include granularity sensor, metal abrasive particle sensor and oil product six in one sensor respectively, the detection index of oil product six in one sensor is temperature, power viscosity, density, dielectric constant, water activity and water content. The device detects the oil liquid that circulates water pump gear box draws out and supplies simultaneously, not only can obtain the state of lubricating oil in gear box but also is favorable to obtaining the influence that filtration cooling equipment lubricating oil quality produces, is favorable to preventing filtration cooling equipment failure.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil detection technology, and in particular to a gearbox lubricating oil monitoring device for nuclear power plant circulating water pumps. Background Technology

[0002] Both the nuclear island and conventional island of a nuclear power plant require circulating water pumps. To meet the requirements of high reliability and long-term operation of nuclear power plants, circulating water pumps are used to ensure the continuity of thermal circulation. Monitoring the lubricating oil of circulating water pumps can prevent mechanical failures caused by lubrication failure, and can also determine the remaining life of the lubricating oil, allowing for timely oil changes and extending the overall service life of the circulating water pump. Circulating water pumps typically have lubricating oil filtration and cooling equipment to cool and filter the lubricating oil during operation. Existing technologies usually only obtain the lubricating oil parameters in the circulating water pump gearbox, or the lubricating oil parameters in the oil tank of the lubricating oil filtration and cooling equipment (such as the lubrication diagnostic system for a nuclear circulating pump gearbox disclosed in CN117231723A). This only allows for the detection of the lubricating oil in the circulating water pump gearbox or the lubricating oil supplied to the gearbox, but cannot assess the impact of the filtration and cooling equipment on the quality of the lubricating oil, which is not conducive to the timely detection of potential failures in the filtration and cooling equipment. Utility Model Content

[0003] The purpose of this invention is to provide a gearbox lubricating oil monitoring device for a nuclear power plant circulating water pump. This device can simultaneously detect the oil pumped out and supplied to the gearbox of the circulating water pump. It can not only obtain the state of the lubricating oil in the gearbox, but also help to understand the impact of the quality of the lubricating oil in the filtration and cooling equipment, thus helping to prevent malfunctions of the filtration and cooling equipment.

[0004] To achieve this objective, the present invention adopts the following technical solution: A gearbox lubricating oil monitoring device for a nuclear power plant circulating water pump is disclosed. The gearbox of the nuclear power plant circulating water pump is equipped with an oil extraction pipe and an oil supply pipe. The oil extraction pipe and the oil supply pipe are respectively connected to a lubricating oil filtration and cooling device and an oil storage tank. The oil extraction pipe and the oil supply pipe are respectively connected to the monitoring device. The monitoring device includes a housing and an oil extraction monitoring mechanism and an oil supply monitoring mechanism disposed within the housing. The oil supply monitoring mechanism is connected to the oil supply pipe, and the oil extraction monitoring mechanism is connected to the oil extraction pipe. The oil supply monitoring mechanism and the oil extraction monitoring mechanism respectively include a particle size sensor, a metal abrasive sensor and a six-in-one oil sensor. The detection indicators of the six-in-one oil sensor are temperature, dynamic viscosity, density, dielectric constant, water activity and water content.

[0005] Furthermore, a first vibration damping joint is provided on the pipeline connecting the oil extraction pipe to the input end of the oil extraction monitoring mechanism, and a second vibration damping joint is provided on the pipeline connecting the oil supply pipe to the oil supply monitoring mechanism.

[0006] Furthermore, the housing is provided with a first hose and a second hose, the first hose connecting the first vibration damping joint and the oil pumping monitoring mechanism, and the second hose connecting the oil supply pipe and the oil supply monitoring mechanism.

[0007] Furthermore, a first pressure reducing valve is provided between the first hose and the oil pumping monitoring mechanism, and a second pressure reducing valve is provided between the second hose and the oil supply monitoring mechanism; The output end of the oil pumping monitoring mechanism and the output end of the oil supply monitoring mechanism are respectively equipped with a drain pump.

[0008] Furthermore, the device also includes a vibration damping housing, in which the housing, the first pressure reducing valve, the second pressure reducing valve, and the drain pump are all located. The first hose and the second hose extend into the vibration damping housing and are connected to the oil extraction monitoring mechanism and the oil supply monitoring mechanism, respectively.

[0009] 6. Further, the vibration-damping housing includes a shell layer and a damping layer, the damping layer covers the inner wall of the shell layer, and the outer walls of the housing, the first pressure-reducing valve, the second pressure-reducing valve and the drain pump are all in contact with the damping layer; The shock-absorbing layer is provided with positioning holes corresponding to the first hose and the second hose.

[0010] Furthermore, the damping layer is a vibration-damping sponge.

[0011] Furthermore, the device also includes a display screen assembly mounted on the housing, and the vibration-damping housing has a window corresponding to the display screen.

[0012] Furthermore, the oil supply monitoring mechanism and the oil extraction monitoring mechanism each include a detection chamber, which is fixed inside the housing; The particle size sensor, metal abrasive sensor, and oil six-in-one sensor are respectively installed in the detection chamber.

[0013] Furthermore, the metal abrasive sensor and the oil six-in-one sensor are respectively fixed to the mounting port of the detection cavity by threaded connection; The inlet of the detection chamber is equipped with a liquid-catching ring, and the end of the detection tube of the particle size sensor is connected to the liquid-catching ring.

[0014] The technical solution provided by this utility model can include the following beneficial effects: The gearbox lubricating oil monitoring device in this nuclear power plant circulating water pump allows the oil extraction and supply monitoring mechanisms to separately monitor the oil in the extraction and supply pipelines. Real-time monitoring enables the monitoring of both the gearbox lubricating oil and the supplied lubricating oil. The condition of the supplied lubricating oil reflects the impact of the lubricating oil filtration and cooling equipment on oil quality. Furthermore, intelligent methods allow for a rapid comparison of the extracted and supplied oil parameters to identify potential malfunctions in the filtration and cooling equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the monitoring device and the circulating water pump system in one embodiment of the present invention; Figure 2 It is a schematic diagram showing the coordination of the monitoring device, the oil extraction pipe, and the oil supply pipe; Figure 3 It is a schematic diagram of the shell, the oil pumping monitoring mechanism, and the oil supply monitoring mechanism; Figure 4 This is a structural diagram of an oil pumping monitoring agency or an oil supply monitoring agency; Figure 5 This is a schematic diagram of the monitoring device after the vibration damping outer shell has been removed; Among them, there are oil extraction pipe 01, oil supply pipe 02, lubricating oil filtration and cooling equipment 03, and oil storage tank 031. 1. Housing; 11. Oil extraction monitoring mechanism; 12. Oil supply monitoring mechanism; 13. Particle size sensor; 14. Metal abrasive sensor; 15. Oil six-in-one sensor; 16. Detection chamber; 17. Liquid trapping ring. 2. First vibration damping joint; 3. Second vibration damping joint; 4. First hose; 5. Second hose; 6. First pressure reducing valve; 7. Second pressure reducing valve; 8. Drain pump. Vibration-damping outer shell 9, shell layer 91, damping layer 92, window 93 Display assembly 10. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] The following is combined with Figures 1 to 5This invention describes a gearbox lubricating oil monitoring device for a nuclear power plant circulating water pump according to an embodiment of the present invention. The gearbox of the nuclear power plant circulating water pump is equipped with an oil extraction pipe and an oil supply pipe. The oil extraction pipe and the oil supply pipe are respectively connected to a lubricating oil filtration and cooling device and an oil storage tank. The oil extraction pipe and the oil supply pipe are respectively connected to the monitoring device. The monitoring device includes a housing 1 and an oil extraction monitoring mechanism 11 and an oil supply monitoring mechanism 12 disposed within the housing 1. The oil supply monitoring mechanism 12 is connected to the oil supply pipe, and the oil extraction monitoring mechanism 11 is connected to the oil extraction pipe. The oil supply monitoring mechanism and the oil extraction monitoring mechanism respectively include a particle size sensor 13, a metal abrasive sensor 14 and an oil six-in-one sensor 15. The detection indicators of the oil six-in-one sensor 15 are temperature, dynamic viscosity, density, dielectric constant, water activity and water content.

[0018] The gearbox lubricating oil monitoring device of this nuclear power plant circulating water pump uses an oil extraction monitoring mechanism 11 and an oil supply monitoring mechanism 12 to detect the oil in the extraction and supply pipelines, respectively. Real-time monitoring allows for the monitoring of both the gearbox lubricating oil and the supplied lubricating oil. The condition of the supplied lubricating oil reflects the impact of the lubricating oil filtration and cooling equipment on oil quality. In particular, intelligent methods further compare the parameters of the extracted and supplied oil to quickly identify potential faults in the filtration and cooling equipment. It should be noted that simply detecting the lubricating oil in the gearbox cannot promptly identify potential faults in the filtration and cooling equipment, while only detecting the supplied lubricating oil cannot accurately determine its parameters, affecting the rapid assessment of the gearbox condition. This device can simultaneously detect the conditions of both types of lubricating oil, facilitating the conversion of "parameter changes" into "condition judgments" through an intelligent system, enabling timely identification of lubricating oil conditions and potential faults in the gearbox and filtration and cooling equipment.

[0019] This design integrates the oil extraction monitoring mechanism 11 and the oil supply monitoring mechanism 12 into a single housing 1, and limits the types of sensors used, which facilitates miniaturization of the monitoring device and makes it easier to install in nuclear power plant circulating water pump systems. Through an intelligent system, The monitoring device of this invention includes a particle size sensor 13, which can detect all particulate matter in the oil. The particle size sensor 13 and the metal abrasive sensor 14 work together to obtain the number of non-metallic abrasive particles by measuring the total number of particles and the number of metal abrasive particles, which is beneficial for determining the degree of contamination or cleanliness of the lubricating oil. A laser particle size sensor 13 is preferred, while an impedance-type metal abrasive sensor is selected. However, oil vibration can affect the sensor's detection accuracy. The circulating water pump is a large piece of equipment, and noise or lubricating oil vibration is unavoidable during operation. To improve the sensor's detection accuracy and prevent sensor displacement and damage, this solution incorporates a vibration damping structure. Specifically, a first vibration damping joint 2 is provided on the pipeline connecting the oil extraction pipe to the input end of the oil extraction monitoring mechanism 11, and a second vibration damping joint 3 is provided on the pipeline connecting the oil supply pipe to the oil supply monitoring mechanism 12. The two vibration damping heads eliminate oil vibration input to the monitoring mechanism; rubber vibration damping joints are preferred. For example, the oil extraction pipe and the oil supply pipe are connected to the vibration damping joints via tee pipes. Furthermore, the housing 1 is provided with a first hose 4 and a second hose 5. The first hose 4 connects the first vibration damping joint 2 and the oil pumping monitoring mechanism 11, and the second hose 5 connects the oil supply pipe and the oil supply monitoring mechanism 12. The hoses facilitate the connection between the monitoring mechanism and the vibration damping joint, and can also absorb oil vibration. For example, the hoses are metal hoses or plastic hoses.

[0020] The oil in both the supply and extraction pipes has a certain oil pressure. To control the oil pressure entering the monitoring mechanism, a first pressure reducing valve 6 is installed between the first hose 4 and the extraction monitoring mechanism 11, and a second pressure reducing valve 7 is installed between the second hose 5 and the supply monitoring mechanism 12. Drain pumps 8 are respectively installed at the output ends of the extraction monitoring mechanism 11 and the supply monitoring mechanism 12. The drain pumps 8 are used to discharge the oil from the monitoring mechanism, enabling real-time oil detection.

[0021] To further improve the detection accuracy of the sensor and prevent sensor displacement and damage, in one embodiment of this utility model, the monitoring device further includes a vibration-damping housing 9. The housing 1, the first pressure-reducing valve 6, the second pressure-reducing valve 7, and the drain pump 8 are all located inside the vibration-damping housing 9. The first hose 4 and the second hose 5 extend into the vibration-damping housing 9 and are connected to the oil extraction monitoring mechanism 11 and the oil supply monitoring mechanism 12, respectively. Preferably, the two pressure-reducing valves are connected to the two monitoring mechanisms via hoses. The vibration-damping housing 9 also prevents oil vibration caused by external noise from affecting the sensor. The housing 1 facilitates the installation of the two monitoring mechanisms inside the vibration-damping housing 9. For example, the vibration-damping housing 9 consists of a bottom shell and a cover. The cover is connected to the bottom shell by a snap-fit ​​mechanism, allowing the cover to be quickly opened and closed, facilitating the maintenance and replacement of the sensor, pressure-reducing valve, and drain pump. In other embodiments, the vibration-damping housing 9 is an explosion-proof housing.

[0022] Specifically, the vibration-damping housing 9 includes a shell layer 91 and a damping layer 92. The damping layer 92 covers the inner wall of the shell layer 91, and the outer walls of the housing 1, the first pressure-reducing valve 6, the second pressure-reducing valve 7, and the drain pump 8 are all in contact with the damping layer 92. The damping layer 92 is provided with positioning holes corresponding to the first hose 4 and the second hose 5. By making the damping layer 92 in contact with other components, excellent vibration damping effect can be achieved. The damping layer 92 can also achieve noise isolation, further improving the detection accuracy of the sensor. Preferably, the damping layer 92 is a vibration-damping sponge. Vibration-damping sponge is easy to mold and install.

[0023] To facilitate maintenance personnel's observation of lubricating oil status parameters, in one embodiment of this utility model, the monitoring device further includes a display screen assembly 10, which is mounted on the housing 1. The vibration-damping outer shell 9 has a window 93 corresponding to the display screen. By mounting the display screen assembly 10 on the housing 1, the vibration-damping outer shell 9 protects the display screen assembly 10, preventing vibration damage to the components within it. A transparent soundproof panel, such as soundproof glass, can be installed at the window 93 of the vibration-damping outer shell 9.

[0024] In one embodiment of this utility model, the oil supply monitoring mechanism and the oil extraction monitoring mechanism each include a detection chamber 16, which is fixed inside the housing 1; the particle size sensor 13, the metal abrasive sensor 14, and the six-in-one oil sensor 15 are respectively installed in the detection chamber 16. Thus, oil detection can be completed using only one detection chamber 16, making assembly simple.

[0025] Specifically, the metal abrasive sensor 14 and the oil six-in-one sensor 15 are respectively fixed to the mounting port of the detection chamber 16 by threaded connection, making installation convenient. A liquid-catching ring 17 is provided at the liquid inlet of the detection chamber 16, and the end of the detection tube of the particle size sensor 13 is connected to the liquid-catching ring 17. The detection tube of the particle size sensor 13 is the flow channel for detecting oil particle size. The liquid-catching ring 17 can increase the amount of oil entering the detection tube of the particle size sensor 13, thereby improving the accuracy of oil particle size detection. The flow channel of the laser particle size sensor 13 needs to remain stable to prevent detection errors caused by particle vibration.

[0026] Other components and operations of the gearbox lubricating oil monitoring device for a nuclear power plant circulating water pump according to the present invention are known to those skilled in the art and will not be described in detail here.

[0027] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0029] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0031] For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. Although embodiments of this utility model have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A gearbox lubricating oil monitoring device for a nuclear power plant circulating water pump, wherein the gearbox of the nuclear power plant circulating water pump is provided with an oil extraction pipe and an oil supply pipe, the oil extraction pipe and the oil supply pipe are respectively connected to a lubricating oil filtration and cooling device and an oil storage tank, and the oil extraction pipe and the oil supply pipe are respectively connected to the monitoring device, characterized in that, The monitoring device includes a housing and an oil extraction monitoring mechanism and an oil supply monitoring mechanism disposed within the housing. The oil supply monitoring mechanism is connected to the oil supply pipe, and the oil extraction monitoring mechanism is connected to the oil extraction pipe. The oil supply monitoring mechanism and the oil extraction monitoring mechanism respectively include a particle size sensor, a metal abrasive sensor and a six-in-one oil sensor. The detection indicators of the six-in-one oil sensor are temperature, dynamic viscosity, density, dielectric constant, water activity and water content.

2. The apparatus according to claim 1, characterized in that, A first vibration damping joint is provided on the pipeline connecting the oil extraction pipe to the input end of the oil extraction monitoring mechanism, and a second vibration damping joint is provided on the pipeline connecting the oil supply pipe to the oil supply monitoring mechanism.

3. The apparatus according to claim 2, characterized in that, The housing is provided with a first hose and a second hose. The first hose connects the first vibration damping joint and the oil pumping monitoring mechanism, and the second hose connects the oil supply pipe and the oil supply monitoring mechanism.

4. The apparatus according to claim 3, characterized in that, A first pressure reducing valve is provided between the first hose and the oil pumping monitoring mechanism, and a second pressure reducing valve is provided between the second hose and the oil supply monitoring mechanism; The output end of the oil pumping monitoring mechanism and the output end of the oil supply monitoring mechanism are respectively equipped with a drain pump.

5. The apparatus according to claim 4, characterized in that, It also includes a vibration damping housing, in which the housing, the first pressure reducing valve, the second pressure reducing valve, and the drain pump are all located. The first hose and the second hose extend into the vibration damping housing and are connected to the oil pumping monitoring mechanism and the oil supply monitoring mechanism, respectively.

6. The apparatus according to claim 5, characterized in that, The vibration damping housing includes a shell layer and a damping layer. The damping layer covers the inner wall of the shell layer. The outer walls of the shell, the first pressure reducing valve, the second pressure reducing valve, and the drain pump are all in contact with the damping layer. The shock-absorbing layer is provided with positioning holes corresponding to the first hose and the second hose.

7. The apparatus according to claim 6, characterized in that, The damping layer is a vibration-damping sponge.

8. The apparatus according to claim 5, characterized in that, It also includes a display assembly, which is mounted on the housing, and the vibration-damping housing has a window corresponding to the display.

9. The apparatus according to any one of claims 1-8, characterized in that, The oil supply monitoring mechanism and the oil extraction monitoring mechanism each include a detection chamber, and the detection chamber is fixed inside the housing; The particle size sensor, metal abrasive sensor, and oil six-in-one sensor are respectively installed in the detection chamber.

10. The apparatus according to claim 9, characterized in that, The metal abrasive sensor and the oil six-in-one sensor are respectively fixed to the mounting port of the detection cavity by threaded connection; The detection tube of the particle size sensor is connected to a liquid trapping ring at its end. The detection tube of the particle size sensor and the liquid trapping ring are located inside the detection chamber, and the liquid trapping ring is directly opposite the liquid inlet of the detection chamber.

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