Assembly type metal wear particle sensor

Abstract

The invention relates to the technical field of sensors, and discloses an assembly type metal wear particle sensor which comprises a sensor body used for detecting wear particles; the oil pipe is used for installing the oil pipe and bearing other structural parts; the assembling mechanism is located outside the oil pipe and used for assisting the sensor body to be installed on the oil pipe; the adsorption mechanism is located outside the sensor body and used for adsorbing particles, the adsorption mechanism comprises a sensor probe, the sensor probe is installed on the outer side of the sensor body, the outer side of the sensor probe is fixedly connected with two connecting rods, and the outer sides of the two connecting rods are fixedly connected with a cylindrical cover. After the sensor body is powered on, the coil in the cylindrical cover generates a magnetic field to adsorb metal wear particles in oil, accurate detection is achieved, the cylindrical cover is made of soft magnetic alloy, the magnetic field adsorption effect can be enhanced, meanwhile, particulate matter is prevented from directly making contact with a sensor probe, and the probe is protected against pollution and damage.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and particularly to an assembled metal wear particle sensor. Background Art

[0002] In the field of industrial production, the normal operation of mechanical equipment is crucial for ensuring production efficiency and product quality. As a key component for monitoring the operating status of mechanical equipment, the metal wear particle sensor plays an indispensable role. With the continuous improvement of industrial automation, the demand for real-time monitoring of equipment operating status has become increasingly urgent. The metal wear particle sensor can detect metal wear particles in the oil, and by analyzing information such as the quantity, size, and composition of the particles, it can timely detect the wear condition of mechanical equipment, providing an important basis for equipment maintenance and fault warning. In application scenarios such as automotive engines, industrial gearboxes, and large hydraulic systems, the performance of the metal wear particle sensor directly affects the reliability and service life of the equipment.

[0003] For the metal wear particle sensors in the prior art, in terms of the installation structure, a threaded installation method is generally adopted. This installation method sets mutually matching threads on the sensor and equipment such as oil pipes, and screws the sensor to the corresponding position. In terms of the detection principle, detection technologies such as inductive or capacitive are mostly used. The inductive sensor senses wear particles by detecting the change in the magnetic field of the coil caused by the approach of metal particles, while the capacitive sensor detects based on the principle that metal particles change the capacitance value.

[0004] However, the metal wear particle sensors with threaded installation in the prior art have many problems in practical applications. For example, in the complex working conditions of an automotive engine, the intense vibration generated during engine operation and the high-temperature and high-pressure environment of the oil make the threaded connection prone to loosening. Once the thread is loose, the sensor will displace, resulting in inaccurate detection positions and being unable to accurately detect the true situation of metal wear particles in the oil. This is because under the influence of long-term vibration and temperature changes, the friction between the threads will gradually decrease, making it difficult to maintain a tight connection state. Moreover, during the installation process, threaded installation requires the operator to accurately align the threads and perform screwing operations, which is a relatively cumbersome process and has low installation efficiency. When the existing sensors with threaded installation are disassembled and repaired, due to problems such as corrosion and seizure of the threads caused by long-term use, the disassembly is difficult, consuming a large amount of time and manpower, which is in sharp contrast to the convenience of the new design that can be easily disassembled by simply pulling the pull rod. In terms of detection performance, the simple adsorption device of the existing sensors is easily affected by particle accumulation, affecting the detection accuracy, and it is difficult to achieve self-cleaning. Therefore, the present invention provides an assembled metal wear particle sensor to solve the deficiencies existing in the prior art. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an assembled metal wear particle sensor, which solves the problems of easy particle accumulation at the probe of the metal wear particle sensor in the prior art, cumbersome installation operation of the sensor, and poor stability after installation.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: An assembled metal wear particle sensor, comprising:

[0007] A sensor body for detecting wear particles;

[0008] An oil pipe for installing the oil pipe and carrying other structural parts;

[0009] An assembly mechanism located outside the oil pipe for assisting in installing the sensor body on the oil pipe;

[0010] An adsorption mechanism located outside the sensor body for adsorbing particulate matter. The adsorption mechanism includes a sensor probe. The sensor probe is installed on the outside of the sensor body. Two connecting rods are fixedly connected to the outside of the sensor probe. A cylindrical cover is fixedly connected to the outside of the two connecting rods. A coil is arranged inside the cylindrical cover. A connecting seat is fixedly connected to the outside of the sensor body.

[0011] Preferably, a plurality of circulation holes are provided on the outside of the cylindrical cover, and the material of the cylindrical cover is soft magnetic alloy.

[0012] Preferably, the assembly mechanism includes a sealing component, a limiting component, and a guiding component. The sealing component includes an installation ring. The installation ring is fixedly connected to the outer circumference of the sensor body. An installation hole is provided on the outside of the oil pipe. The outside of the installation ring fits with the inside of the installation hole.

[0013] Preferably, an installation pad is fixedly connected to the outside of the sensor body. The outside of the installation pad is fixedly connected to the outside of the installation ring. The outside of the installation pad fits with the outside of the oil pipe.

[0014] Preferably, the limiting component includes two fixing blocks. Two fixing pieces are fixedly connected to the outside of the fixing blocks. One end of the two fixing pieces is fixedly connected to the outside of the oil pipe. Two limiting blocks are fixedly connected to the outside of the sensor body.

[0015] Preferably, a movable block is slidably connected to the inside of the fixing block. A sliding rod is fixedly connected to the outside of the movable block. A spring is sleeved on the outside of the sliding rod. One end of the spring is fixedly connected to the outside of the movable block, and the other end of the spring is fixedly connected to the inner wall of the fixing block.

[0016] Preferably, one end of the sliding rod penetrates through the outer wall of the fixed block and is fixedly connected to a connection disk. Two pull rods are fixedly connected to the outer side of the connection disk, and the outer side of the movable block is in contact with the outer side of the limiting block.

[0017] Preferably, the guiding assembly includes two guiding blocks and two groups of guiding plates. The outer sides of the guiding blocks are fixedly connected to the outer side of the sensor body. The number of each group of guiding plates is two, and the outer sides of the guiding blocks are slidably connected to the adjacent sides of the two guiding plates.

[0018] The present invention provides an assembled metal wear particle sensor, having the following beneficial effects:

[0019] 1. After the sensor body of the present invention is powered on, a magnetic field is generated in the cylindrical cover by the coil to adsorb metal wear particles in the oil, achieving precise detection. The cylindrical cover is made of soft magnetic alloy material, which can enhance the magnetic field adsorption effect. At the same time, it can prevent the particulate matter from directly contacting the sensor probe, protecting the probe from pollution and damage, and extending its service life. When self-cleaning is required, the current is switched to change the direction of the magnetic field, repelling the adsorbed particles to discharge from a specific gap, maintaining the good detection performance of the probe, and ensuring that the sensor can continuously and accurately detect the wear particles in the oil.

[0020] 2. The present invention uses the inclined plane at the top of the mounting ring and elastic material to effectively reduce the resistance when inserting into the mounting hole, and then tightly fits the hole wall to achieve primary sealing. The combination of the rigid bottom and the silicone top of the mounting pad, relying on the softness of the silicone to fill the gap, forms a secondary seal on the outer side of the oil pipe. The double-seal design can ensure the good sealing performance of the installation part in all directions, effectively avoid oil leakage, create a stable working environment for the sensor, strongly guarantee the accuracy of the detection result, and greatly reduce the occurrence of detection errors or equipment failures caused by oil leakage.

[0021] 3. Through the cooperation of the guiding blocks and the guiding plates, the present invention enables the sensor body to be accurately positioned during the installation process and quickly slide into the preset position, greatly shortening the installation time. When disassembling, the operator only needs to pull the pull rod on the connection disk to easily retract the movable block, release the limit on the limiting block, and then the sensor body can be smoothly taken out of the oil pipe without the need for additional complex tools or cumbersome steps, significantly improving the efficiency of overhauling or replacing the sensor, and saving a large amount of time and labor costs for equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the present invention;

[0023] Figure 2 is a schematic structural view of the pull rod of the present invention;

[0024] Figure 3 is a schematic structural view of the mounting pad of the present invention;

[0025] Figure 4 Schematic diagram of the cylindrical cover structure of the present invention;

[0026] Figure 5 Schematic diagram of the guide block structure of the present invention.

[0027] Wherein, 1, sensor body; 2, oil pipe; 3, mounting hole; 4, mounting ring; 5, mounting pad; 6, sensor probe; 7, cylindrical cover; 8, through hole; 9, connecting rod; 10, connecting seat; 11, limiting block; 12, fixing piece; 13, fixing block; 14, movable block; 15, sliding rod; 16, spring; 17, connecting disc; 18, pull rod; 19, guide block; 20, guide plate. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to the attached Figure 1 - attached Figure 5 , an assembled metal wear particle sensor provided by an embodiment of the present invention includes: a sensor body 1 for detecting wear particles; an oil pipe 2 for installing the oil pipe 2 and carrying other structural members; an assembly mechanism located outside the oil pipe 2 for assisting the installation of the sensor body 1 on the oil pipe 2; an adsorption mechanism located outside the sensor body 1 for adsorbing particulate matter. The adsorption mechanism includes a sensor probe 6, and the sensor probe 6 is installed on the outside of the sensor body 1. Two connecting rods 9 are fixedly connected to the outside of the sensor probe 6, and a cylindrical cover 7 is fixedly connected to the outside of the two connecting rods 9. The material of the cylindrical cover 7 is a soft magnetic alloy, which can enhance the adsorption effect of the magnetic field. A coil is arranged inside the cylindrical cover 7. After the sensor body 1 is powered on, current is provided for the coil to generate a magnetic field, and this magnetic field can effectively adsorb metal wear particles. A connecting seat 10 is fixedly connected to the outside of the sensor body 1, and a plurality of through holes 8 are opened on the outside of the cylindrical cover 7. The through holes 8 are evenly distributed, and the number of holes is reasonably set according to the size of the cylindrical cover 7, which can not only ensure the normal flow of the oil fluid, but also enable the adsorbed particles to smoothly enter the inside of the cylindrical cover 7 through the through holes 8 under the action of the magnetic field.

[0030] The assembly mechanism includes a sealing component, a limiting component, and a guiding component. The sealing component includes an installation ring 4, which is made of an elastic material such as rubber. Its top is designed with an inclined surface of about 45°, which can effectively reduce the resistance when inserted into the installation hole 3, closely fit the inner wall of the installation hole 3, and achieve good sealing. The installation ring 4 is fixedly connected to the outer periphery of the sensor body 1. An installation hole 3 is provided on the outer side of the oil pipe 2, and the outer side of the installation ring 4 is in contact with the inner side of the installation hole 3. An installation pad 5 is fixedly connected to the outside of the sensor body 1. The top of the installation pad 5 is made of silica gel, and the bottom is made of metal. The silica gel part can fully fill the gap between the sensor body 1 and the oil pipe 2, enhance the sealing effect, and prevent oil leakage. The outer side of the installation pad 5 is fixedly connected to the outer side of the installation ring 4, and the outer side of the installation pad 5 is in contact with the outer side of the oil pipe 2. The limiting component includes two fixing blocks 13, and the fixing blocks 13 are fixed to the oil pipe 2 by welding to ensure its stability. Two fixing pieces 12 are fixedly connected to the outer side of the fixing blocks 13, and the material is stainless steel to ensure the connection strength between the fixing blocks 13 and the oil pipe 2. Two limiting blocks 11 are fixedly connected to the outer side of the sensor body 1, and the limiting blocks 11 are integrally formed with the sensor body 1. An active block 14 is slidably connected to the inner side of the fixing block 13. A sliding rod 15 is fixedly connected to the outer side of the active block 14, and a spring 16 is sleeved on the outside of the sliding rod 15. One end of it is fixedly connected to the outer side of the active block 14, and the other end is fixedly connected to the inner wall of the fixing block 13. One end of the sliding rod 15 penetrates through the outer wall of the fixing block 13 and is fixedly connected to a connection disk 17, which is convenient for the operator to pull the pull rod 18 to control the active block 14. The outer side of the active block 14 is in contact with the outer side of the limiting block 11, so that the active block 14 can be smoothly pushed to slide when the two are in contact. When the inclined surfaces of the limiting block 11 and the active block 14 are staggered, the elastic force of the spring 16 will quickly reset the active block 14, so that the planes between the active block 14 and the limiting block 11 are in contact, and a limiting effect is exerted on the limiting block 11. The guiding component includes two guiding blocks 19 and two groups of guiding plates 20. The guiding blocks 19 are made of polytetrafluoroethylene material, which has a low friction coefficient and can slide smoothly between the guiding plates 20. The outer side of the guiding block 19 is fixedly connected to the outer side of the sensor body 1. The number of each group of guiding plates 20 is two, which plays an accurate guiding role for the sensor body 1 to ensure that the sensor body 1 will not deviate during the installation process. The outer side of the guiding block 19 is slidably connected to the adjacent sides of the two guiding plates 20.

[0031] Specifically, first, the sensor body 1 is installed. The sensor body 1 is inserted into the oil pipe 2 from the mounting hole 3. The mounting ring 4 is made of elastic materials such as rubber, and its top is designed to be an inclined surface of about 45°. When the sensor body 1 is inserted, this inclined surface can effectively reduce the resistance when inserting into the mounting hole 3, just like a wedge, making it easier for the mounting ring 4 to enter the mounting hole 3. As the insertion depth increases, the mounting ring 4 fits tightly to the inner wall of the mounting hole 3 by virtue of its own elasticity, thereby firmly blocking the mounting hole 3 and effectively preventing oil from leaking from the mounting hole 3. This is the first layer of sealing guarantee. The top of the mounting pad 5 is made of silicone and the bottom is made of metal. Since the bottom metal material is rigid, it can provide stable support for the top silicone, so that the top of the mounting pad 5 can be closely attached to the outer surface of the oil pipe 2. The softness of silicone enables it to fill the small gap between the sensor body 1 and the oil pipe 2, further enhance the sealing effect, prevent oil from leaking, and form a double sealing effect with the mounting ring 4 to ensure good sealing of the entire installation part and avoid affecting the working environment and detection accuracy of the sensor due to oil leakage. In the process of assembling the sensor body 1 to the oil pipe 2, the guide block 19 plays an important role. The guide block 19 is made of polytetrafluoroethylene material and has an extremely low friction coefficient. There are two guide plates 20 in each group. When the sensor body 1 is pushed to be installed inside the oil pipe 2, the guide block 19 slides along the middle channel of the two guide plates 20. This design can accurately guide the moving direction of the sensor body 1, avoid the sensor body 1 from being offset or tilted during the installation process, so that the sensor body 1 can be stably and accurately inserted into the preset position inside the oil pipe 2, greatly improving the stability and accuracy of the installation, ensuring that the sensor can work normally after installation, and avoiding detection errors or equipment failures due to installation deviations. At the same time, during the movement of the sensor body 1, the limit assembly begins to play a role. The limit block 11 fixedly connected to the outside of the sensor body 1 cooperates with the movable block 14 slidably connected to the inside of the fixed block 13. The limit block 11 is formed integrally with the sensor body 1. When the sensor body 1 moves, the inclined surface of the limit block 11 gradually contacts the inclined surface of the movable block 14. As the sensor body 1 continues to move forward, the inclined surface of the limit block 11 will squeeze the movable block 14 to slide inside the fixed block 13. In this process, the slide bar 15 fixedly connected to the outside of the movable block 14 slides synchronously in the fixed block 13, and compresses the spring 16 sleeved on the outside of the slide bar 15. When the inclined surface of the limit block 11 is offset from the inclined surface of the movable block 14, the elastic force accumulated by the previous compression of the spring 16 is instantly released, pushing the movable block 14 to quickly reset. At this time, the plane between the movable block 14 and the limit block 11 fits tightly, and the movable block 14 blocks the limit block 11 from continuing to move, thereby limiting the limit block 11. This limiting mechanism ensures that the sensor body 1 will not be displaced due to factors such as the impact of the oil flow in the oil pipe 2 or the vibration of the equipment after being installed in place, thereby ensuring the stability of the sensor during operation.When it is necessary to disassemble the sensor body 1 for maintenance or replacement, the operator can pull the two pull rods 18 on the connection plate 17 connected to one end of the slide rod 15. Pulling the pull rods 18 will drive the slide rod 15 to move, and then the movable block 14 will move back into the fixed block 13, releasing the limit on the limit block 11. At this time, the sensor body 1 can be smoothly removed from the oil pipe 2. In addition, from the perspective of the detection and self-cleaning functions of the sensor, the sensor body 1 is inductive. After the sensor body 1 is powered on, it will cause a magnetic field to be generated in the coil inside the cylindrical cover 7. Specifically, the sensor body 1 will supply current to the coil, thereby generating a magnetic field. This magnetic field can effectively adsorb the metal wear particles in the flowing oil in the oil pipe 2, thereby realizing the detection function of the wear particles. The cylindrical cover 7 is made of soft magnetic alloy material. The soft magnetic alloy can enhance the adsorption effect of the magnetic field, and the cylindrical cover 7 can prevent the particulate matter from being directly adsorbed onto the sensor probe 6, preventing the particulate matter from contaminating or damaging the sensor probe 6, extending the service life of the sensor probe 6, and ensuring the accuracy of detection. A plurality of flow holes 8 are evenly distributed on the outer side of the cylindrical cover 7. The number of holes is reasonably set according to the size of the cylindrical cover 7. The setting of these flow holes 8 can prevent the cylindrical cover 7 from causing a large obstruction to the flow of the oil in the oil pipe 2 while not affecting the adsorption effect of the cylindrical cover 7 on the particulate matter, ensuring that the oil can flow normally and smoothly in the oil pipe 2 and maintaining the normal operation of the entire system. When it is necessary to self-clean the sensor, the direction of the current inside the sensor body 1 is switched. At this time, the direction of the coil magnetic field changes. The changed magnetic field will generate a repulsive force on the particles that have been adsorbed on the inner side of the cylindrical cover 7. Under the action of this repulsive force, the particles on the inner side of the cylindrical cover 7 will be discharged from the gap between the cylindrical cover 7 and the sensor probe 6. This avoids the particles from accumulating around the sensor probe 6 for a long time and affecting it, ensuring that the sensor probe 6 always maintains good detection performance and ensuring that the sensor can continuously and accurately detect the wear particles in the oil.

[0032] Working principle: First, insert the sensor body 1 into the interior of the oil pipe 2 from the mounting hole 3. The mounting ring 4 and the mounting pad 5 are both made of elastic materials. The top of the mounting ring 4 is designed with a slope, which is convenient for entering the mounting hole 3 and is stuck on the inner side of the mounting hole 3 to block the mounting hole 3. The bottom of the mounting pad 5 is made of rigid material, which allows the top of the mounting pad 5 to be close to the outer side of the oil pipe 2, thereby achieving a double sealing effect. When the sensor body 1 is assembled, the guide block 19 can be allowed to slide along the middle channel of the two guide plates 20, which can guide the movement of the sensor body 1, making the installation of the sensor body 1 more stable. When the sensor body 1 moves, the slope of the limit block 11 contacts the slope of the movable block 14, squeezing the movable block 14 to slide toward the inside of the fixed block 13. When the slope of the limit block 11 is offset from the slope of the movable block 14, the elastic force of the spring 16 will allow the movable block 14 to quickly reset. , so that the planes between the movable block 14 and the limit block 11 fit together, and the limit block 11 has a limit effect. By pulling the pull rod 18, the movable block 14 can be moved back to the fixed block 13 to release the limit on the limit block 11, so that the sensor body 1 can be disassembled for inspection or replacement; in addition, the sensor body 1 is inductive, and after power is turned on, the coil inside the cylindrical cover 7 generates a magnetic field to adsorb particles. In this way, the detection is performed, and the cylindrical cover 7 can prevent particles from being directly adsorbed onto the sensor probe 6. The setting of the flow hole 8 prevents the cylindrical cover 7 from having a significant impact on the flow of oil inside the oil pipe 2. By switching the direction of the current inside the sensor body 1, the direction of the coil magnetic field can be changed, so that the particles are repelled and a self-cleaning effect is achieved. The particles on the inner side of the cylindrical cover 7 will be discharged from the gap between the cylindrical cover 7 and the sensor probe 6 to avoid affecting the sensor probe 6.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled metal wear particle sensor, characterized in that: include: A sensor body (1) for detecting wear particles; The oil pipe (2) is used to install the oil pipe (2) and to carry other structural parts; An assembly mechanism, located outside the oil pipe (2), and used to assist the sensor body (1) in being mounted on the oil pipe (2); An adsorption mechanism is located outside the sensor body (1) and is used for adsorbing particulate matter. The adsorption mechanism comprises a sensor probe (6). The sensor probe (6) is mounted on the outside of the sensor body (1). Two connecting rods (9) are fixedly connected to the outside of the sensor probe (6). A cylindrical cover (7) is fixedly connected to the outside of the two connecting rods (9). A coil is arranged inside the cylindrical cover (7). A connecting seat (10) is fixedly connected to the outside of the sensor body (1).

2. The assembled metal wear particle sensor according to claim 1, characterized in that: A plurality of flow holes (8) are provided on the outer side of the cylindrical cover (7), and the material of the cylindrical cover (7) is a soft magnetic alloy.

3. The assembled metal wear particle sensor according to claim 1, characterized in that: The assembly mechanism comprises a sealing component, a limiting component and a guiding component. The sealing component comprises a mounting ring (4). The mounting ring (4) is fixedly connected to the outer periphery of the sensor body (1). The outer side of the oil pipe (2) is provided with a mounting hole (3). The outer side of the mounting ring (4) is in contact with the inner side of the mounting hole (3).

4. The assembled metal wear particle sensor according to claim 3, characterized in that: The outside of the sensor body (1) is fixedly connected to a mounting pad (5), the outside of the mounting pad (5) is fixedly connected to the outside of the mounting ring (4), and the outside of the mounting pad (5) is in contact with the outside of the oil pipe (2).

5. The assembled metal wear particle sensor according to claim 3, characterized in that: The limit assembly comprises two fixed blocks (13), the outer side of the fixed block (13) is fixedly connected to two fixed plates (12), one end of the two fixed plates (12) is fixedly connected to the outer side of the oil pipe (2), and the outer side of the sensor body (1) is fixedly connected to two limit blocks (11).

6. The assembled metal wear particle sensor according to claim 5, characterized in that: The inner side of the fixed block (13) is slidably connected to a movable block (14), the outer side of the movable block (14) is fixedly connected to a sliding rod (15), the outer side of the sliding rod (15) is sleeved with a spring (16), one end of the spring (16) is fixedly connected to the outer side of the movable block (14), and the other end of the spring (16) is fixedly connected to the inner wall of the fixed block (13).

7. The assembled metal wear particle sensor according to claim 6, characterized in that: One end of the sliding rod (15) passes through the outer wall of the fixed block (13) and is fixedly connected to a connecting plate (17). Two pull rods (18) are fixedly connected to the outer side of the connecting plate (17). The outer side of the movable block (14) contacts the outer side of the limit block (11).

8. The assembled metal wear particle sensor according to claim 3, characterized in that: The guide assembly comprises two guide blocks (19) and two groups of guide plates (20), the outer sides of the guide blocks (19) are fixedly connected to the outer side of the sensor body (1), the number of guide plates (20) in each group is two, and the outer sides of the guide blocks (19) are slidably connected to the adjacent sides of the two guide plates (20).

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