A lubricating oil agitating purification system with variable electric field

Abstract

The utility model relates to lubricating oil purification technical field especially, relates to a kind of variable electric field's lubricating oil stirring purification system, including cabin, stirring device, electric field module, monitoring module, electric field module includes: annular electrode array, cabin bottom electrode, high voltage adjustable power supply;The annular electrode array coaxial integration is in stirring device and with stirring device electrical insulation;The cabin bottom electrode is integrated in the bottom of cabin inner wall and with cabin electrical insulation;The high voltage adjustable power supply is connected respectively with annular electrode array and cabin bottom electrode, for forming variable electric field;The monitoring module includes: oil quality sensor, central control unit, central control unit respectively and oil quality sensor, high voltage adjustable power supply electric connection;The cabin includes oil suction port, and oil suction port is set in the vicinity of cabin bottom electrode area, the utility model can combine electric field purification with stirring device, simplify structure and can dynamically adjust purification process parameter, realize efficient, stable, accurate purification.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil purification technology, and in particular to a lubricating oil stirring and purification system with a variable electric field. Background Technology

[0002] After prolonged use in mechanical equipment, lubricating oil deteriorates due to oxidation, thermal decomposition, and the introduction of external impurities (such as metal particles, moisture, and dust), forming harmful substances such as sludge and gum. These impurities reduce the performance of the lubricating oil and exacerbate equipment wear. Therefore, refining and purifying the lubricating oil in use is crucial for extending its lifespan and ensuring the safe operation of equipment.

[0003] Existing technologies, such as the utility model patent CN202121965218, include a stirring mechanism, but it is only used for mechanical stirring.

[0004] The existing technology CN119245251A uses a vortex tube for temperature control but does not involve electric field purification technology.

[0005] In addition, the purification process is mostly a preset operation with a fixed duration, which makes it impossible to accurately adjust the purification process parameters according to the actual degree of contamination of the lubricating oil, which may lead to insufficient purification or over-treatment.

[0006] For impurity particles smaller than micrometers, these suspended fine particles are the main cause of the decline in the dielectric properties of oil and the formation of sludge. Traditional mechanical filters are difficult to effectively intercept them and have limited removal efficiency.

[0007] Therefore, it is necessary to further improve a lubricating oil stirring and purification system with a variable electric field. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the existing defects and provide a lubricating oil stirring and purification system with a variable electric field. The system combines electric field purification with a stirring device, optimizes the structure, and can adjust the purification process parameters according to temperature and dielectric constant to achieve efficient, stable and precise purification, which can effectively solve the problems in the background technology.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a lubricating oil stirring and purification system with a variable electric field, comprising a chamber, a stirring device, an electric field module, and a monitoring module. The electric field module includes: a ring electrode array, a bottom electrode, and a high-voltage adjustable power supply. The ring electrode array is coaxially integrated on the stirring device and electrically insulated from it. The bottom electrode is integrated into the bottom of the inner wall of the chamber and electrically insulated from it. The high-voltage adjustable power supply is connected to the ring electrode array and the bottom electrode respectively to form a variable electric field.

[0010] The monitoring module includes an oil quality sensor and a central control unit. The central control unit is electrically connected to the oil quality sensor and the high-voltage adjustable power supply, respectively, and is used to detect the dielectric constant of the lubricating oil and control the high-voltage adjustable power supply to adjust the output voltage and change the electric field strength.

[0011] The chamber includes an oil suction port located near the bottom electrode, which is used to extract impurity oil that has accumulated in the area under the influence of an electric field.

[0012] Preferably, the ring electrode array consists of multiple conductive rings.

[0013] Preferably, the monitoring module includes a temperature sensor, the chamber includes an electric heating device, and the central control unit is electrically connected to the temperature sensor and the electric heating device respectively, for controlling the electric heating device to adjust the temperature of the lubricating oil in the chamber according to the temperature value detected by the temperature sensor.

[0014] Preferably, the high-voltage adjustable power supply is a power supply with adjustable output voltage amplitude and frequency.

[0015] Preferably, the chamber includes a filter device and an oil outlet. The filter device is used to filter the impurity oil sucked in by the oil inlet, and the oil outlet is used to discharge the purified lubricating oil.

[0016] Preferably, the conductive rings of the annular electrode array are distributed with non-uniform spacing along the axial direction of the stirring device, and the spacing gradually decreases from top to bottom, in order to form a stepped decreasing electric field intensity gradient.

[0017] Preferably, the bottom electrode is a mesh electrode, and the mesh pore size matches the oil suction port pore size of the filter device.

[0018] The working principle and application principle of this utility model are as follows:

[0019] This invention provides a lubricating oil stirring and purification system with a variable electric field. A ring electrode array is coaxially integrated on the stirring device, forming a dynamic non-uniform variable electric field with the bottom electrode. The electric field strength is dynamically adjusted according to the dielectric constant data output by the oil quality sensor, causing impurity particles to migrate directionally to the filtration area, thereby improving the impurity removal efficiency. The system achieves efficient purification of lubricating oil through the synergistic effect of mechanical stirring and electric field purification. The core functional units of the system consist of a tank, a stirring device, an electric field module, and a monitoring module.

[0020] The electric field module employs a configuration of a ring electrode array and a bottom electrode. The ring electrode array is coaxially integrated onto the stirring device and electrically isolated from it, forming a non-uniform electric field with the bottom electrode, which serves as a high-voltage electrode. This design establishes an adjustable electric field using a high-voltage adjustable power supply (such as the PI500-01 series). The ring electrode array uses axially distributed conductive rings with a spacing that is sparse at the top and dense at the bottom, forming a stepped electric field intensity distribution. The bottom electrode uses a hexagonal grid structure with a grid-to-oil inlet aperture ratio of 1:1.5 to 1:2. This ensures that the electric field lines converge, making it easier for particles to be captured, while avoiding a decrease in flow rate or secondary suspension of particles due to excessively small apertures.

[0021] The monitoring module collects real-time data on the oil's state using an OCC330A oil dielectric constant sensor and an MBT 5260 temperature sensor; the central control unit implements three-level electric field control based on the change in dielectric constant Δε.

[0022] Maintain a reference electric field of 5-8 kV / cm when Δε < 5%;

[0023] When 5% ≤ Δε < 15%, the 8-15kV / cm linear enhancement electric field is activated;

[0024] When Δε≥15%, switch to a 15-25kV / cm pulsed strong electric field (duty cycle 30-50%).

[0025] In terms of temperature control, in addition to relying solely on temperature sensor data for temperature control, the central control unit can work in conjunction with the dielectric constant obtained from the oil quality sensor and temperature data to adjust the lubricating oil temperature and electric field through an electric heating device and an electric field module to improve filtration efficiency.

[0026] When the system is working, the rotating agitator drives the ring electrode array to move synchronously, eliminating the coverage blind zone present in the traditional electrostatic field. Impurity particles with different dielectric constants are driven by dielectric migration force in a non-uniform electric field: high dielectric constant impurities such as metal particles migrate towards the bottom electrode (high field strength region), while low dielectric constant components move towards the ring electrode (low field strength region). The gradient distribution of electric field strength and the fluid shear force generated by stirring work together to improve the particle migration efficiency. The impurity oil enriched near the bottom electrode is extracted through the oil suction port with matching aperture, and discharged from the oil outlet after being treated by the filter device.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] 1. By utilizing the dielectric electrophoresis effect of an electric field on impurity particles in lubricating oil, the impurity particles are directionally migrated to the strong electric field region at the bottom of the chamber, achieving rapid and efficient enrichment of tiny impurities with high purification efficiency.

[0029] 2. The stirring function and electric field generation function are integrated into the stirring device, realizing the synergistic effect of mechanical stirring and electric field purification. Stirring ensures uniform heating of the oil and full suspension of impurities, resulting in more comprehensive electric field coverage. The structural design of the bottom electrode ensures efficient capture of impurities, simplifies the overall system structure, and enhances the stability of system operation.

[0030] 3. Based on the dielectric constant of the oil quality sensor and the temperature data of the temperature sensor, the system achieves precise matching of lubricating oil purification parameters through dynamic adjustment of three-level electric field strength and coordinated temperature control, avoiding excessive energy consumption while ensuring the best purification effect under different levels of contamination. Attached Figure Description

[0031] Figure 1 This is a system structure block diagram of the present invention;

[0032] Figure 2 This is a schematic diagram illustrating the working principle of this utility model;

[0033] Figure 3 This is a schematic diagram of the electric field module of this utility model. Detailed Implementation

[0034] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0035] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or sets.

[0036] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0037] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0040] Please see Figure 1-3 This utility model provides a technical solution: a lubricating oil stirring and purification system with a variable electric field, including a chamber, a stirring device, an electric field module, and a monitoring module. The electric field module includes: a ring electrode array, a bottom electrode, and a high-voltage adjustable power supply. The ring electrode array is coaxially integrated on the stirring device and electrically insulated from it. The bottom electrode is integrated on the bottom of the inner wall of the chamber and electrically insulated from it. The high-voltage adjustable power supply is connected to the ring electrode array and the bottom electrode respectively to form a variable electric field.

[0041] The monitoring module includes an oil quality sensor and a central control unit. The central control unit is electrically connected to the oil quality sensor and the high-voltage adjustable power supply, respectively, and is used to detect the dielectric constant of the lubricating oil and control the high-voltage adjustable power supply to adjust the output voltage and change the electric field strength.

[0042] The chamber includes an oil suction port located near the bottom electrode, which is used to extract impurity oil that has accumulated in the area under the influence of an electric field.

[0043] Specifically, the annular electrode array is electrically isolated from the stirring device via ceramic bearings or PTFE insulating sleeves, while the bottom electrode is electrically isolated from the chamber by maintaining an air gap between the electrode and the chamber via ceramic insulating pads or mica gaskets. A high-voltage adjustable power supply establishes a high-voltage difference between the annular electrode array and the bottom electrode, with the bottom electrode acting as the high-voltage electrode and the annular electrode array as the low-voltage electrode, forming a non-uniformly distributed electric field. The annular electrode array is integrated onto the stirring device and rotates coaxially with it, synchronizing the electric field distribution with the stirring motion and avoiding coverage blind spots caused by relative displacement. This design ensures a significant increase in electric field coverage during stirring, unaffected by mechanical stirring motion.

[0044] Utilizing the dielectric effect, when particles are placed in an electric field, they experience dielectric force due to polarization. The direction of this force depends on the difference in dielectric constant between the particle and the surrounding medium. If the dielectric constant of the particles (such as metal particles, dust, oxides, and other impurity particles, which have a dielectric constant different from that of the lubricating oil base fluid) is greater than that of the medium (such as base oil molecules and conventional additives, which typically have a dielectric constant close to that of the lubricating oil base fluid), the particles migrate towards the region with higher electric field strength (positive dielectricization); conversely, they migrate towards the region with lower electric field strength (negative dielectricization). Based on this principle, this invention guides impurity particles with different dielectric constants to move towards the oil outlet region by controlling the distribution and intensity of the electric field. The stirring action of the stirring device can expand the coverage of the electric field, and the shearing force generated by its rotation will disrupt the suspension stability of the particles, achieving synergy between mechanical stirring and electric field purification, thereby improving filtration efficiency.

[0045] The higher the impurity content in lubricating oil, the greater its equivalent composite dielectric constant (e.g., metal particles are highly conductive, oxides are highly polar). The oil quality sensor can be a model such as the OCC330A oil dielectric constant sensor, which can measure the charge distribution and electric field response in the oil to obtain the current equivalent composite dielectric constant of the lubricating oil and send the signal to the central control unit.

[0046] In the central control unit, the change Δε between the equivalent composite dielectric constant and the dielectric constant of the lubricating oil base fluid can characterize the current impurity concentration in the lubricating oil. The central control unit controls the output of the high-voltage adjustable power supply according to the preset dielectric constant-electric field strength mapping relationship.

[0047] The adjustment of electric field strength follows the rule: E = k·Δε (where E is the electric field strength and k is the proportionality coefficient, determined through calibration). For example:

[0048] Low pollution (Δε<5%) → Reduced energy consumption due to the reference electric field (5-8kV / cm);

[0049] Medium pollution (5% ≤ Δε < 15%) → linearly enhanced electric field (8-15 kV / cm);

[0050] High pollution (Δε≥15%) → pulsed strong electric field (15-25kV / cm, duty cycle 30-50%) increases migration speed.

[0051] Furthermore, the ring electrode array consists of multiple conductive rings.

[0052] Specifically, in this embodiment, the annular electrode array uses four conductive rings as a reference, but those skilled in the art will understand that other numbers are also applicable to this invention. The axially distributed conductive rings of the annular electrode array can form a multi-layer radial electric field, with the electric field direction pointing from high voltage (bottom electrode) to low voltage (conductive ring). The electric field lines are radially distributed, achieving three-dimensional spatial coverage and ensuring that impurity particles migrate uniformly and in a controlled manner within the stirring area. The voltage of each conductive ring is independently controlled in segments by an optocoupler relay connected to a high-voltage adjustable power supply, which can adapt to different dielectric constant data, flexibly adjust the electric field gradient, and optimize the directional migration path of particles.

[0053] Furthermore, the monitoring module includes a temperature sensor, the chamber includes an electric heating device, and the central control unit is electrically connected to the temperature sensor and the electric heating device respectively, for controlling the electric heating device to adjust the temperature of the lubricating oil in the chamber according to the temperature value detected by the temperature sensor.

[0054] Specifically, the temperature sensor can be a model such as Danfoss MBT 5260, and the central control unit collects the lubricating oil temperature in real time through the temperature sensor.

[0055] When the detected value is lower than the set threshold, the electric heating device is activated to raise the temperature; when the temperature exceeds the upper limit threshold, the heating is turned off to ensure that the lubricating oil temperature is maintained within the set working range (e.g., 40-80℃).

[0056] In addition to relying solely on temperature sensor data for temperature control, the central control unit can work in conjunction with temperature data obtained from the oil quality sensor to adjust the lubricating oil temperature and electric field through an electrothermal device and an electric field module, thereby improving the filtration effect. For example:

[0057] When the dielectric constant increases (indicating an increase in impurity particles / moisture), the electric field strength is automatically increased (e.g., from the reference electric field to a linearly enhanced electric field) and the heating temperature is reduced (e.g., from 80℃ to 65℃) to prevent impurity particles from agglomerating due to high temperature (the probability of 10μm particles agglomerating at 80℃ is 2.3 times higher than at 65℃). At the same time, the strong electric field is used to make charged impurities migrate more efficiently and directionally to the vicinity of the oil outlet of the bottom electrode of the tank.

[0058] It not only ensures the optimal viscosity conditions for electric field-driven particle migration, but also achieves a dynamic balance of impurity saturation solubility through the coupling relationship of temperature and dielectric constant, so that impurity particles are in the state most easily captured by the electric field.

[0059] Furthermore, the high-voltage adjustable power supply is a power supply with adjustable output voltage amplitude and frequency.

[0060] Specifically, the high-voltage adjustable power supply can be a model such as the PI500-01 series, which is suitable for dynamically adjusting the electric field strength. It can achieve precise control through the central control unit based on the dielectric constant obtained by the oil quality sensor.

[0061] The high-voltage adjustable power supply can change the electric field strength and distribution by adjusting the voltage amplitude, frequency and phase difference between the ring electrode array and the bottom electrode, so as to adapt to different working conditions, such as: reference electric field, linear enhanced electric field and pulsed strong electric field.

[0062] Furthermore, the chamber includes a filter device and an oil outlet. The filter device is used to filter the impurity oil sucked in by the oil inlet, and the oil outlet is used to discharge the purified lubricating oil.

[0063] Specifically, the filtration device extracts the concentrated impurity oil through the oil suction port for filtration, and the filtered clean lubricating oil can be discharged from the tank or returned to the tank through the oil outlet according to process requirements.

[0064] The central control unit acquires data from the oil quality sensor. When the dielectric constant reaches the preset clean oil standard value, it stops heating and high-voltage electric field or enters low-power standby mode.

[0065] Furthermore, the conductive rings of the annular electrode array are distributed with non-uniform spacing along the axial direction of the stirring device, and the spacing gradually decreases from top to bottom, in order to form a stepped decreasing electric field intensity gradient.

[0066] Specifically, by creating a differentiated electric field intensity distribution through a non-uniform spacing with a sparse upper section and a dense lower section, the directional migration of particles can be guided more precisely, avoiding local electric field dead zones caused by uniform spacing. The fluid velocity near the stirring device usually varies axially, and the gradient spacing can match the flow field disturbance, reduce particle re-diffusion, and improve migration efficiency. The area near the oil suction port can have a denser conductive ring to form a strong electric field focusing, ensuring that the particles are ultimately efficiently adsorbed.

[0067] Furthermore, the bottom electrode is a mesh electrode, and its mesh pore size matches the oil suction port pore size of the filter device.

[0068] Specifically, in this embodiment, the ratio of the mesh aperture to the oil suction port diameter can be set to 1:1.5 to 1:2 (e.g., when the oil suction port diameter is 3mm, the corresponding mesh aperture is 1.5-2mm). A mesh aperture slightly smaller than the oil suction port ensures that the electric field lines converge at the edge of the oil suction port, enhancing the local field strength and making it easier for particles to be captured. If the mesh is too large, the electric field will be unevenly distributed due to the edge effect; if it is too small, the fluid resistance will increase significantly. This ratio keeps the pressure drop of the oil passing through the mesh within the laminar flow range, avoiding a decrease in flow rate or secondary suspension of particles due to an excessively small aperture.

[0069] The electrode wires of the bilge electrode adopt a hexagonal grid structure, which has a better aperture ratio than that of a square grid.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lubricating oil stirring and purification system with a variable electric field, comprising a chamber, a stirring device, an electric field module, and a monitoring module, characterized in that: The electric field module includes: a ring electrode array, a bottom electrode, and a high-voltage adjustable power supply; the ring electrode array is coaxially integrated on the stirring device and is electrically insulated from the stirring device; the bottom electrode is integrated on the bottom of the inner wall of the chamber and is electrically insulated from the chamber; the high-voltage adjustable power supply is connected to the ring electrode array and the bottom electrode respectively to form a variable electric field; The monitoring module includes an oil quality sensor and a central control unit. The central control unit is electrically connected to the oil quality sensor and the high-voltage adjustable power supply, respectively, and is used to detect the dielectric constant of the lubricating oil and control the high-voltage adjustable power supply to adjust the output voltage and change the electric field strength. The chamber includes an oil suction port located near the bottom electrode, which is used to extract impurity oil that has accumulated in the area under the influence of an electric field.

2. A lubricating oil agitated purification system with variable electric field according to claim 1, characterized in that: The ring electrode array consists of multiple conductive rings.

3. A variable electric field lubricating oil agitated purification system according to claim 1 wherein: The monitoring module includes a temperature sensor, and the chamber includes an electric heating device. The central control unit is electrically connected to the temperature sensor and the electric heating device, respectively, and is used to control the electric heating device to adjust the temperature of the lubricating oil in the chamber according to the temperature value detected by the temperature sensor.

4. A variable electric field lubricating oil agitated purification system according to claim 1 wherein: The high-voltage adjustable power supply is a power supply whose output voltage amplitude and frequency are adjustable.

5. A variable electric field lubricating oil agitated purification system as defined in claim 1 wherein: The chamber includes a filter device and an oil outlet. The filter device is used to filter the impurity oil sucked in by the oil inlet, and the oil outlet is used to discharge the purified lubricating oil.

6. A variable electric field lubricating oil agitated purification system according to any one of claims 1 to 5, wherein: The conductive rings of the annular electrode array are distributed with non-uniform spacing along the axial direction of the stirring device, and the spacing gradually decreases from top to bottom, in order to form a stepped decreasing electric field intensity gradient.

7. A variable electric field lubricating oil agitated purification system according to any one of claims 1 to 5, wherein: The bottom electrode is a grid-shaped electrode, and its grid pore size matches the oil suction port pore size of the filter device.

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