CN105891060A - Online wear particle monitoring system adopting electric shock hammer adsorption and adjacent capacitance - Google Patents

Abstract

The invention relates to an online wear particle monitoring system adopting electric shock hammer adsorption and adjacent capacitance. The system comprises a temperature control module, a magnetization module, an absorption module, an adjacent capacitance particle monitoring module and a demagnetization module which are sequentially connected, wherein a liquid oil inlet is formed in one end of the temperature control module; the absorption module is specifically a homopolar adjacency type absorption ring provided with an electric shock hammer. The online wear particle monitoring system introduces an adjacent capacitance transducer technology based on a capacitance edge effect, thus realizing non-intrusive and unconstrained monitoring for wear particles; the wear particles in liquid oil are magnetized by the magnetization module and are absorbed by the absorption module, so that the intensities of monitoring signals output by an adjacent capacitance transducer are improved; by arranging the temperature control module and reasonably designing an adjacent capacitance transducer polar plate layer structure, noise suppression is realized and the whole performance of an adjacent capacitance transducer monitoring device is optimized.

Description

An Online Monitoring System for Wear Particles Using Electric Hammer Adsorption and Adjacent Capacitors

【Technical field】

The invention relates to an online monitoring system for wear particles in hydraulic pipeline oil, in particular to an online monitoring system for wear particles using electric hammer adsorption and adjacent capacitors, and belongs to the technical field of hydraulic systems.

【Background technique】

The wear particles in the hydraulic system oil can not only cause abrasive wear of the kinematic pair, but also hinder the relative movement of the kinematic pair, resulting in malfunction of the control components. Statistics at home and abroad show that 70% of hydraulic machinery failures come from particle pollution of oil. Therefore, on-line monitoring of wear particles in oil has become one of the important ways to reduce wear and hydraulic system failures.

Capacitive sensors are used in the pollution monitoring of machine oil because of their convenient fabrication and low cost. Patent Document 1 (Chinese Invention Patent Authorization Announcement No. CN101435788B) discloses an online oil monitoring sensor and its system based on dielectric constant measurement. The sensor of this invention includes a support and three poles fixed inside. The column constitutes a differential cylindrical capacitor, which can monitor the small changes in the capacitance of the sensor, thereby inverting the small changes in the dielectric constant of the oil, and then realize the monitoring of the degree of oil pollution. In this monitoring method, the pole of the sensor is immersed in the oil, which changes the flow state of the oil and affects the measurement accuracy; the oil will form a deposited oil film on the surface of the pole of the sensor, which not only reduces the measurement accuracy, but also brings Sensor cleaning problem.

Document 2 (Zhao Xinze et al., Journal of Wuhan University of Water Conservancy and Electric Power (Yichang), 1999 (3)) discloses a capacitive sensor probe for oil pollution monitoring. The probe consists of a cylindrical glass tube and two halves that are close to the outer wall of the tube. Composed of circular electrodes, its essence is a parallel plate capacitive sensor. The distance between the excitation plate and the receiving plate of the capacitive sensor is restricted by the diameter of the hydraulic pipeline. Since the diameter of the hydraulic pipeline is relatively large, the sensitivity of the sensor is not ideal.

Therefore, in order to solve the above technical problems, it is indeed necessary to provide an innovative on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors, so as to overcome the above-mentioned defects in the prior art.

【Content of invention】

In order to solve the above technical problems, the object of the present invention is to provide an on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors, which uses a non-invasive measurement method, is unrestricted to the measured, has a strong monitoring signal and is sensitive High, low cost, strong environmental adaptability.

In order to achieve the above purpose, the technical solution adopted by the present invention is: an online monitoring system for wear particles using electric hammer adsorption and adjacent capacitors, which includes a temperature control module, a magnetization module, an adsorption module, an adjacent capacitor particle monitoring module, and a degaussing module. module; wherein, the temperature control module, the magnetization module, the adsorption module, the adjacent capacitive particle monitoring module and the degaussing module are sequentially connected; one end of the temperature control module is provided with an oil inlet; the adsorption module adopts an electric hammer Homopolar adjacent adsorption rings; the homopolar adjacent adsorption rings with electric hammers include aluminum ring pipes, forward solenoids, reverse solenoids, iron magnetic caps, separators, and electric hammers and an electromagnet; the forward solenoid and the reverse solenoid are respectively arranged in the aluminum annular pipe, and the two have opposite currents, so that the adjacent positions of the forward solenoid and the reverse solenoid Generate the same magnetic pole; the iron magnetic permeable cap is arranged on the inner wall of the aluminum ring pipe, which is located adjacent to the forward solenoid and the reverse solenoid, and the forward solenoid and the reverse solenoid The middle point of the axis; the partition is located between the forward solenoid and the reverse solenoid; the electric hammer and the electromagnet are located between the partition; the electromagnet is connected and can push the electric hammer to make the electric shock The hammer strikes the inner wall of the aluminum ring pipe.

The on-line monitoring system of wear particles using electric hammer adsorption and adjacent capacitors of the present invention is further set as follows: the temperature control module includes a heater, a cooler and a temperature sensor; the heater is lubricated by Chongqing Jinhong with temperature detection An oil heater; the cooler is a surface evaporative air cooler, and the finned tube of the cooler is a KLM type finned tube; the temperature sensor is a platinum resistance temperature sensor.

The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors of the present invention is further set as follows: the magnetization device includes aluminum pipes, several windings, iron shells, flanges and several magnetization current output modules; wherein, the Several windings are respectively wound outside the aluminum pipe, and each winding is composed of a forward winding and a reverse winding, and the currents in the forward winding and the reverse winding are equal in size; the iron shell is covered on the aluminum pipe; the flange is welded on Both ends of the aluminum pipe; each magnetizing current output module is connected to a winding.

The wear particle online monitoring system using electric hammer adsorption and adjacent capacitors of the present invention is further set as follows: the adjacent capacitor particle monitoring module includes a plexiglass inner wall, a ground shielding layer, a receiving plate, an exciting plate and an outer wall; wherein, The inner wall of the machine glass, the grounding shielding layer and the outer wall are in a tubular structure, and are arranged sequentially from the inside to the outside; the thickness of the inner wall of the machine glass is 0.5 mm, and the dielectric constant is 2.5; the dielectric constant of the grounding shielding layer is 1.5-2.5, the thickness is 1 to 2 times the thickness of the outer wall; the receiving plate and the exciting plate are embedded on the ground shielding layer and located outside the inner wall of the machine glass; the receiving plate and the exciting plate are all made of leather Arnold's curve structure polar plate layer, with an isolation layer between them; the width of the isolation layer is 0.8-1 times the thickness of the inner wall of the plexiglass.

The on-line monitoring system of wear particles using electric hammer adsorption and adjacent capacitors of the present invention is further configured as follows: one end of the degaussing module is provided with an oil outlet, which is composed of a residual magnetism sensor and a degausser.

The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors of the present invention is also set as follows: it includes an ECU, the remanence sensor, degausser, heater, cooler, temperature sensor, magnetization current output module, adsorption Both the module and the adjacent capacitive particulate monitoring module are electrically connected to the ECU.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the magnetization module with multi-pair forward and reverse coil structure of the present invention, the coil current can be digitally set online to generate the non-uniform magnetic field required for magnetization, so that the wear particles in the oil can be strongly magnetized and aggregated into large particles, and at the same time make the glue The plasma particles decompose and ablate and inhibit the growth of bubbles; the magnetized particles on the surface of the tube wall are captured by the adsorption module.

2. Introduce an adjacent capacitive sensor based on the capacitive edge effect into the hydraulic pipeline wear particle monitoring device. By magnetizing and aggregating the wear particles into large particles, the dielectric constant of the oil on the surface of the pipe wall is increased, which greatly improves the output signal of the sensor. Intensity and ingeniously resolved the conflict between signal strength and penetration depth indicators.

3. The Peano curve structure with long effective edge and complex structure is introduced in the plate layer design. In the plate layer of the Peano curve structure, the curve composed of the excitation plate, the receiving plate and the isolation plate can traverse all the points in the square plate layer, and obtain a curve that fills the space of the entire square plate layer. In the case of a fixed plate layer area, the structure has the longest effective edge, the largest plate area and the most complex structure, so as to obtain the best signal strength.

4. The combination of temperature control module, magnetization module, adsorption module, and adjacent capacitive particle monitoring module combines the technical route of hydraulic pipeline wear particle monitoring, which not only ensures the reliability of monitoring, but also optimizes the overall performance of the monitoring system.

【Description of drawings】

Fig. 1 is a structural schematic diagram of the wear particle online monitoring system using electric hammer adsorption and adjacent capacitors according to the present invention.

FIG. 2 is a structural diagram of the magnetization module in FIG. 1 .

FIG. 3 is a structural diagram of the magnetized coil in FIG. 2 .

FIG. 4 is a structural diagram of the magnetizing current output module in FIG. 2 .

Fig. 5 is a schematic structural diagram of the adsorption device in Fig. 1 being a homopolar adjacent type adsorption ring with an electric hammer.

FIG. 6-1 is a radial half-sectional view of the adjacent capacitive particle monitoring module in FIG. 1 .

FIG. 6-2 is a transverse cross-sectional view of adjacent capacitive particle monitoring modules in FIG. 1 .

Figure 6-3 is a schematic diagram of the receiving plate and the exciting plate in Figure 6-1.

Figure 6-4 is a partial enlarged view of A in Figure 6-3.

Figure 7 is a schematic diagram of the connection of the ECU.

【detailed description】

Please refer to accompanying drawings 1 to 7 of the description, the present invention is an on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors, which consists of a temperature control module 1, a magnetization module 2, an adsorption module 5, an adjacent The capacitive particulate monitoring module 6, the degaussing module 7, and the ECU 10 are composed of several parts. Wherein, the temperature control module 1 , the magnetization module 2 , the adsorption module 5 , the adjacent capacitive particle monitoring module 6 and the degaussing module 7 are connected in sequence.

One end of the temperature control module 1 is provided with an oil inlet 8 for inputting hydraulic oil into the device, which is composed of a heater, a cooler and a temperature sensor. The main purpose of the temperature control module 1 is to provide an optimum magnetization temperature of about 42° C. for the magnetization device. At the same time, temperature is the most important environmental noise. Different temperatures will cause significant changes in the dielectric constant of the oil in the hydraulic pipeline. Keeping the temperature constant can avoid the influence of temperature noise on adjacent capacitive sensors.

The heater is an electric heater, and Chongqing Jinhong's lubricating oil heater with its own temperature detection can be used. The cooler can choose the surface evaporative air cooler, which has the advantages of both water cooling and air cooling. Good thermal performance, small contact thermal resistance, large contact area between fins and tubes, tight and firm fit, good ability to withstand rapid changes in cold and heat, high resistance to atmospheric corrosion at the root of the fins; the optimal number of tube rows for air coolers is 8. The temperature sensor adopts platinum resistance temperature sensor.

The magnetization device 2 can strongly magnetize the wear particles carried in the oil, and aggregate the wear particles at the micron level into large particles, which can increase the output signal strength of the adjacent capacitance sensor. At the same time, it can be known from the theory of electromagnetism that the greater the magnetic field strength, the greater the attraction to ferromagnetic particles. Large-sized iron particles move much faster than small-sized iron particles. It is also convenient to aggregate wear particles into large particles. Subsequent separation.

The dielectric constants of colloidal particles and air bubbles carried in the oil are different from those of hydraulic oil and wear particles. In order to avoid affecting the monitoring of adjacent capacitive sensors, it is necessary to design a non-uniform magnetic field to decompose or remove the gel. particles and air bubbles.

According to the theory that the molecular orientation is arranged by the magnetic field, when the oil flows through the magnetic field, the magnetic field will have a certain influence on the movement of the colloidal particles in the oil, making the colloidal particles flow in an orderly manner in the pipeline, reducing the colloidal particles The interconnection of the colloidal particles plays a role in reducing the viscosity of the colloidal particles. At the same time, there is a cohesive force between the magnetized particles, which limits the formation and growth of bubbles. When there are no air bubbles, the magnetic field lines in the oil are evenly distributed, and the oil is in a magnetically stable state. When there are air bubbles in the oil, the local magnetic lines of the air bubbles bend, and the bent magnetic lines tend to return to the original uniform, parallel, and stable state, thus generating magnetic tension pointing to the center of the air bubbles, which can limit the growth of the air bubbles.

However, it is difficult to obtain a good magnetic treatment effect if the magnetic field is too strong or too weak. When the magnetic induction intensity is around a certain value, the magnetic treatment has the best effect. Similarly, the viscosity reduction effect is not good if the temperature is too high or too low. Decomposition and viscosity reduction of colloidal particles in hydraulic oil requires a certain temperature and magnetic field strength. The typical values are a magnetic field strength of about 200mT and a temperature of about 42°C. When designing a non-uniform magnetic field, the influence caused by the edge effect of the magnetic field should be considered. The magnetic induction should be designed to be stronger at the end of the oil inflow and weaker at the end of the oil outflow, satisfying the oil outflow end, reducing the magnetic field, The requirement to alleviate the influence of edge effects while ensuring the magnetization effect at the inflow end of the oil.

The magnetizing device of the present invention is composed of an aluminum pipe 21 , several windings 22 , an iron casing 23 , a flange 24 and several magnetizing current output modules 25 . Wherein, the aluminum pipeline 21 is subjected to magnetization treatment by allowing the oil to flow therethrough, and the magnetic permeability of aluminum is very low, so that a higher magnetic field intensity can be obtained in the pipeline 21 .

The windings 22 are respectively wound outside the aluminum pipe 21 and are made of copper wires with a diameter of about 1.0mm coated with insulating varnish. Each winding 22 is set independently of each other and is controlled by a corresponding magnetizing current output module 25, wherein the current varies according to system requirements. Since each winding 22 is independent of each other, the lead-out end of the coil will cause the current loop formed by the coil to be not a real "circle" but have a gap, which will cause the radial distribution of the magnetic field in the aluminum pipe 21 to be uneven, thereby affecting Magnetizing effect. To solve this problem, each turn of winding 22 in this invention is composed of positive winding 26 and reverse winding 27, the purpose of which is to generate magnetic fields in the same polarity direction and at the same time make up for the unbalanced magnetic field caused by the gap. The currents in the positive and negative windings are equal. There are multiple pairs of positive and negative windings arranged in the axial direction of the aluminum pipe 21, and different currents are passed to form the aforementioned non-uniform magnetic field.

The iron shell 23 is wrapped on the aluminum pipe 21, and the iron material will shield most of the magnetic flux. The flange 24 is welded to both ends of the aluminum pipe 21 .

Each magnetizing current output module 25 is connected to a winding 22 and is controlled by the ECU 10 . It uses the digital potentiometer to communicate with the ECU 10 in real time and modify the resistance in real time to realize real-time control of the non-uniform magnetic field. The digital potentiometer used in the magnetizing current output module 25 is AD5206, which has 6-channel output and can realize single-bus data transmission with the ECU. The ECU realizes the current setting and constant output of multiple magnetizing current output modules of the magnetizing winding through a single bus. The operational amplifier AD8601 and the MOS transistor 2N7002 realize the high-precision voltage follower output through negative feedback. The constant high current output adopts OPA 549, a high voltage and high current op amp from Texas Instruments (TI).

The adsorption module 5 is used to adsorb the magnetized aggregated macroparticles magnetized by the magnetization device 2 . Please refer to the accompanying drawing 5 of the manual, the adsorption module 5 adopts the same-polar adjacent type adsorption ring with electric hammer, and the homopolar adjacent type adsorption ring with electric hammer is composed of aluminum ring pipe 51, forward spiral Tube 52, reverse solenoid 53, iron magnetic permeable cap 54, partition 55, electric hammer 56, electromagnet 57 and other components. Wherein, the forward solenoid 52 and the reverse solenoid 53 are respectively arranged in the aluminum annular pipe 51 and controlled by the ECU 10, and the two are passed with currents in opposite directions, so that the forward solenoid 52 and the reverse Adjacent solenoids 53 generate magnetic poles of the same sex. The iron magnetic permeable cap 54 is arranged on the inner wall of the aluminum ring pipe 51, which is located adjacent to the forward solenoid 52 and the reverse solenoid 53, and the forward solenoid 52 and the reverse solenoid. The midpoint of the tube 53 axis. The electric hammer 56 and the electromagnet 57 are located between the partitions 55 . The electromagnet 57 is connected to and can push the electric hammer 56 so that the electric hammer 56 strikes the inner wall of the aluminum annular pipe 52 . The ECU 10 is electrically connected to and controls the forward solenoid 52 , the reverse solenoid 53 and the electromagnet 57 .

The design principle of the same-polarity-adjacent adsorption ring with the electrified hammer is as follows: there are a plurality of energized solenoids with iron cores inside the adsorption ring, and the adjacent solenoid coils have currents in opposite directions, so that the forward direction Adjacent solenoids and opposing solenoids produce like-sex magnetic poles. At the same time, the inner wall of the adsorption ring adjacent to the forward solenoid and the reverse solenoid, and the middle point of the axis of the forward solenoid and the reverse solenoid is provided with an iron magnetic permeable cap, which is strip-shaped and absorbs The axis of the ring is parallel, and the shell of the adsorption ring is a paramagnetic aluminum outer tube wall. This setting is conducive to improving the magnetic circuit, increasing the magnetic field strength at the inner wall of the adsorption ring, and enhancing the ability to capture and adsorb particles. The current of each solenoid is directly controlled by the ECU, which can be changed according to the particle size and concentration of the particles to obtain the best adsorption performance. An electric hammer controlled by an electromagnet is also arranged between adjacent solenoids, and the two ends are magnetically isolated from the solenoids through a partition. The setting of this electric hammer is used to prevent a large number of particles from accumulating at the ferrous magnetic cap, which will affect the adsorption effect. At this time, the electric hammer is controlled by the electromagnet to strike the inner wall of the adsorption ring, so that the adsorbed particles are dispersed to both sides. At the same time, when cleaning the adsorption ring, the impact of the electric hammer can also improve the cleaning effect. After the adsorption is completed, the electromagnet is used to control the electric hammer to strike the inner wall of the adsorption ring, so that the adsorbed particles are dispersed to both sides, and then the ECU controls the electromagnet to cut off the power, and the paramagnetic aluminum pipe loses its magnetism and adheres to the inner wall of the pipe. The aggregated large particles enter the adjacent capacitive particle monitoring module along with the oil along the pipe wall.

Please refer to Fig. 6-1 to Fig. 6-4 of the specification, the adjacent capacitive particle monitoring module 6 monitors the condition of wear particles in the hydraulic pipeline online. The adjacent capacitive particle monitoring module 6 is composed of a plexiglass inner wall 61 , a ground shielding layer 62 , a receiving plate 63 , an exciting plate 64 , and an outer wall 65 . Wherein, the inner wall 61 of the machine glass, the ground shielding layer 62 and the outer wall 65 are in a tubular structure and arranged sequentially from the inside to the outside.

The thickness of the inner wall 61 of the organic glass is 0.5mm, and the dielectric constant is 2.5 (the dielectric constant of the hydraulic oil is about 2.1), which is close to the dielectric constant of the hydraulic oil, so the edge capacitance is a fixed value; when the surface of the inner wall of the organic glass When the magnetized particles are piled up, the magnetized particles, hydraulic oil and the inner wall of the plexiglass form a mixed dielectric, which acts together on the edge capacitance of the sensor. The dielectric constant of the magnetized particles is usually greater than 10, which is several times the dielectric constant of the hydraulic oil and the inner wall of the plexiglass. , which is enough to cause a significant change in the capacitance of the capacitive sensor edge, so the change in the capacitance value of the adjacent capacitive sensor can be used to reverse the small change in the dielectric constant of the oil, and then realize the monitoring of wear particles.

The performance of adjacent capacitive sensors based on capacitive edge effects mainly depends on the penetration depth (penetration depth of electric field lines), signal strength (magnitude of capacitance value) and noise suppression, measurement sensitivity (sensitivity to voltage changes or electric field changes) and The measurement dynamic range of the sensor. The capacitance value measured by the existing adjacent capacitive sensors is very weak, usually in the pF level or even smaller, and the measurement effect on the medium with low dielectric constant such as metal particles is even worse, so it is particularly important to increase the sensor output signal strength. At the same time, the two indicators of signal strength and penetration depth are in conflict with each other, which is also the difficulty in improving the performance of the sensor.

The signal strength of the adjacent capacitive sensor has a great relationship with the area of the sensor plate, the distance between the plates, the distance between the sensor and the object to be measured, and the dielectric constant of the object to be measured. The wear particles after magnetization polymerization, centrifugation and adsorption treatment gather on the surface of the inner wall of the plexiglass. The increase in the number of particles leads to an increase in the dielectric constant of the oil, and the increase in the particle size caused by particle aggregation also increases the dielectric constant of the oil. At the same time, the magnetization also has the function of increasing the dielectric constant. The three functions at the same time greatly enhance the signal strength; and because the particles are close to the surface of the inner wall of the plexiglass, the penetration depth requirement is almost zero, which also solves the problem of index conflict.

Since the output signal strength of adjacent capacitive sensors is very weak, noise has a significant impact on the measurement results. Usually the noise mainly comes from two aspects, the noise of the sensor itself and the environmental noise. For this reason, a ground shielding layer is designed to reduce the noise of the sensor itself. The dielectric constant of the grounding shielding layer 62 is 1.5-2.5, and the thickness of the shielding layer is preferably between 1 and 2 times of the thickness of the adjacent capacitive sensor outer wall 65, so as to ensure the measurement sensitivity.

The receiving plate 63 and the exciting plate 64 are embedded on the ground shielding layer 62 and located outside the inner wall 61 of the machine glass, forming a gap magnetic field 66 between them for detecting aggregated particles 67 . Both the receiving plate 63 and the exciting plate 64 adopt a plate layer with a long effective edge and a complicated structure of a Peano curve structure. In the plate layer of the Peano curve structure, the curve composed of the exciting plate 63 and the receiving plate 64 can traverse all the points in the square plate layer, and obtain a curve that fills the space of the entire square plate layer. In the case of a fixed plate layer area, the structure has the longest effective edge, the largest plate area and the most complex structure, which increases the effective plate area and plate edge, increases the capacitance value of the sensor edge, and reduces the external interface. circuit sensitivity requirements. In this way, the best signal strength can be obtained, and the curved edges of the excitation plate and the receiving plate of the sensor also avoid high sensitivity and instability at the corners of the plates. Further, an isolating layer 69 is provided between the receiving plate 63 and the exciting plate 64; the width of the isolating layer 69 is 0.8-1 times the thickness of the inner wall of the plexiglass, which can effectively separate the receiving plate 63. The excitation plate 64 is isolated.

One end of the degaussing module 7 is provided with an oil outlet 9, which is composed of a residual magnetic sensor and a degausser. Due to the existence of hysteresis, when the ferromagnetic material is magnetized to a saturated state, even if the external magnetic field is removed, the magnetic induction in the material still does not return to zero, and an external magnetic field is required to demagnetize. In order to prevent magnetized particles from entering the hydraulic circuit and causing damage to pollution-sensitive hydraulic components, the degaussing module 7 controls the demagnetization intensity of the degausser according to the detection value of the remanence sensor at the outlet of the degausser. The demagnetization method used here is electromagnetic demagnetization. The method is to make the magnetic induction intensity in the material return to zero by adding an appropriate reverse magnetic field, and the magnetic field strength or current must be reversed and gradually reduced in sequence.

Please refer to Figure 7 of the specification, the on-line monitoring device for wear particles further includes the ECU10, which can choose PIC16F877 from Microchip. The remanence sensor, degausser, heater, cooler, temperature sensor, magnetizing current output module 25, adsorption module 5, and adjacent capacitive particle monitoring module 6 are all electrically connected to the ECU and controlled by the ECU.

The monitoring of wear particles in hydraulic equipment using the above-mentioned online wear particle monitoring device includes the following methods:

1), the oil in the hydraulic pipeline carries wear particles through the temperature control module 1, and the temperature of the oil is controlled at 42°C through the temperature control module 1;

2), the magnetization module 2 strongly magnetizes the wear particles carried in the oil, so that the micron-sized wear particles aggregate into large magnetic particles;

3), the adsorption module 5 adsorbs the magnetized aggregated large particles magnetized by the magnetization module 2;

4), online monitoring of wear particles in the hydraulic pipeline through the adjacent capacitive particle monitoring module 6;

5), the demagnetization module 7 demagnetizes the magnetized particles to prevent the magnetized particles from entering the hydraulic circuit and causing damage to the pollution-sensitive hydraulic components.

The specific implementation above is only a preferred embodiment of this creation, and is not intended to limit this creation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this creation should be included in this creation. within the scope of protection.

Claims (6)

1. An online monitoring system for wear particles that adopts electric hammer adsorption and adjacent capacitors, characterized in that: it includes a temperature control module, a magnetization module, an adsorption module, an adjacent capacitor particle monitoring module, and a degaussing module; wherein the temperature control The module, the magnetization module, the adsorption module, the adjacent capacitive particle monitoring module and the degaussing module are connected in sequence; one end of the temperature control module is provided with an oil inlet; the adsorption module adopts a homopolar adjacent adsorption ring with an electric hammer; The homopolar adjacent adsorption ring with an electric hammer includes an aluminum ring pipe, a forward solenoid, a reverse solenoid, an iron magnetic cap, a separator, an electric hammer, and an electromagnet; The solenoid and the reverse solenoid are respectively arranged in the aluminum annular pipe, and the two have opposite currents, so that the adjacent parts of the forward solenoid and the reverse solenoid generate the same magnetic pole; the iron The magnetic permeable cap is arranged on the inner wall of the aluminum annular pipe, which is located adjacent to the forward solenoid and the reverse solenoid, and at the middle point of the axes of the forward solenoid and the reverse solenoid; The plate is located between the forward solenoid and the reverse solenoid; the electric hammer and the electromagnet are located between the partitions; the electromagnet is connected and can push the electric hammer, so that the electric hammer strikes the inner wall of the aluminum ring pipe . 2. The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors as claimed in claim 1, wherein: the temperature control module includes a heater, a cooler and a temperature sensor; The lubricating oil heater of Chongqing Jinhong is tested; the cooler is a surface evaporative air cooler, and the finned tube of the cooler is a KLM-type finned tube; the temperature sensor is a platinum resistance temperature sensor. 3. The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors as claimed in claim 1, wherein the magnetization device includes aluminum pipes, several windings, iron shells, flanges and several magnetization currents Output module; wherein, the plurality of windings are respectively wound outside the aluminum pipe, and each winding is composed of a forward winding and a reverse winding, and the currents in the forward winding and the reverse winding are equal; the iron shell is covered on the aluminum pipe ; The flange is welded at both ends of the aluminum pipe; each magnetizing current output module is connected to a winding. 4. The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors as claimed in claim 1, characterized in that: the adjacent capacitor particle monitoring module includes a plexiglass inner wall, a ground shield, a receiving plate, an excitation polar plate and outer wall; wherein, the inner wall of the machine glass, the grounding shielding layer and the outer wall are in a tubular structure, and are arranged sequentially from the inside to the outside; the thickness of the inner wall of the machine glass is 0.5mm, and the dielectric constant is 2.5; the grounding The dielectric constant of the shielding layer is 1.5-2.5, and the thickness is 1 to 2 times the thickness of the outer wall; the receiving plate and the exciting plate are embedded on the grounding shielding layer and located outside the inner wall of the machine glass; the receiving plate Both the excitation plates adopt the Peano curve structure plate layer, and there is an isolation layer between them; the width of the isolation layer is 0.8-1 times the thickness of the inner wall of the plexiglass. 5. The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors as claimed in claim 1, characterized in that: one end of the degaussing module is provided with an oil outlet, which is composed of a residual magnetic sensor and a degausser. 6. The on-line monitoring system for wear particles using electric hammer adsorption and adjacent capacitors as claimed in claim 1, characterized in that: it further comprises an ECU, the remanence sensor, degausser, heater, cooler, temperature The sensor, the magnetizing current output module, the adsorption module and the adjacent capacitive particle monitoring module are all electrically connected to the ECU.