A hydraulic system oil liquid iron content detection device and detection method

Abstract

The application discloses a kind of hydraulic system oil liquid iron content detection device and detection method, it is related to hydraulic system detection technical field, including protective shell, elastic film, detection circuit and magnetic block;The side of the protective shell is equipped with rectangular through-hole, the elastic film is covered and is arranged in rectangular through-hole, the magnetic block is arranged in the inside of protective shell, and the magnetic block is located the inside of elastic film;The detection circuit includes two conductive wires, connecting conductive sheet, power supply, resistance and indicator light;Two the conductive wires are respectively connected with the positive and negative levels of power supply, and the end of two the conductive wires is respectively located the two sides of elastic film;The iron powder particles can be absorbed on the outer surface of elastic film by the magnetic block, due to the adsorption force of the magnetic block to the iron powder particles, will make elastic film deform to the inside and push displacement connecting conductive sheet, further make detection circuit disconnect, can obtain that the iron powder particles in oil liquid are excessive, otherwise, the iron powder particles in oil liquid are not excessive.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system testing technology, specifically to a device and method for detecting the iron content in hydraulic system oil. Background Technology

[0002] The function of a hydraulic system is to increase force by changing pressure. A complete hydraulic system consists of five parts: power element, actuator, control element, auxiliary elements (accessories), and hydraulic fluid. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. Hydraulic transmission systems primarily function to transmit power and motion. Hydraulic control systems, on the other hand, ensure that the hydraulic system output meets specific performance requirements.

[0003] During operation, the actuators of a hydraulic system reciprocate linearly or rotaryly under the pressure of hydraulic fluid, which easily leads to wear and the generation of iron particles. These iron particles flow into the hydraulic fluid. Excessive iron particle content in the fluid can affect the hydraulic system, indirectly indicating excessive wear on the actuators, potentially causing valve jamming and actuator failure. In such cases, shutdown and repair are necessary to prevent serious accidents. Currently, there are no products available that can effectively and quickly detect the iron particle content in hydraulic fluid.

[0004] In view of the above-mentioned defects, the inventors of this invention have finally obtained this invention after a long period of research and practice. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for detecting the iron content in hydraulic system oil, which solves the problem that there is currently no corresponding product that can effectively and quickly detect the iron powder particle content in hydraulic oil.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution: The present invention proposes a hydraulic system oil iron content detection device, including a protective shell, an elastic diaphragm, a detection circuit and a magnetic block; a rectangular through hole is opened on one side of the protective shell, the elastic diaphragm is covered and disposed in the rectangular through hole, and the magnetic block is disposed inside the protective shell, and the magnetic block is located inside the elastic diaphragm.

[0007] The detection circuit includes two conductive wires, a connecting conductive sheet, a power supply, a resistor, and an indicator light. The two conductive wires are respectively connected to the positive and negative terminals of the power supply, and the ends of the two conductive wires are located on both sides of the elastic film. The resistor and the indicator light are connected in series with the conductive wires. The connecting conductive sheet is fixed to the inside of the elastic film. When the elastic film is not subjected to an inward force exceeding a predetermined value, both ends of the connecting conductive sheet are in contact with the two conductive wires. When the elastic film is subjected to an inward force exceeding a predetermined value, the connecting conductive sheet is disconnected from the conductive wires.

[0008] Preferably, the end of the conductive wire near the elastic film is connected to a contact conductive sheet, the contact conductive sheet is inclined, and the contact conductive sheet is made of a soft conductive material.

[0009] Preferably, each end of the connecting conductive sheet has a protrusion, and when the elastic film is not subjected to an inward force exceeding a predetermined value, the protrusion contacts the contact conductive sheet.

[0010] Preferably, the thickness of the connecting conductive sheet and the contact conductive sheet is 0.2-0.5 mm.

[0011] Preferably, it also includes positioning elements for restricting the connecting conductive sheet, the number of the positioning elements is two sets, and the two sets of positioning elements are respectively located on both sides of the elastic film, the positioning elements realize locking and unlocking of the connecting conductive sheet;

[0012] The positioning component includes a first stepper motor and an eccentric wheel. The first stepper motor is fixed to the inner wall of the protective shell, and the eccentric wheel is fixed to the output end of the first stepper motor. When the first stepper motor drives the eccentric wheel to rotate, the straight-line distance between the eccentric wheel and the protrusion is adjusted.

[0013] Preferably, it also includes two guide rods, which are respectively fixed to the inner walls of the protective shell on both sides of the elastic film, and the guide rods slide through the protrusion.

[0014] Preferably, it also includes a control terminal, which is fixedly connected to the protective shell by a connecting rod. The power supply, resistor and indicator light are all located inside the control terminal. The control terminal is equipped with a display screen for displaying the test results.

[0015] Preferably, the number of magnetic blocks is one, and a straight rod motor is installed inside the protective shell. The magnetic block is fixed to the telescopic end of the straight rod motor, and the straight rod motor is controlled by a control terminal.

[0016] Preferably, the number of magnetic blocks is at least two, a rotating shaft is rotatably installed inside the protective shell, a second stepper motor that drives the rotating shaft to rotate is installed inside the protective shell, the magnetic blocks are fixed to the outer circumferential surface of the rotating shaft by a bracket, and the distance between the outer surface of the plurality of magnetic blocks and the rotating shaft decreases one by one.

[0017] The present invention also proposes a detection method based on the hydraulic system oil iron content detection device described in the above claims, comprising the following steps:

[0018] Step 1: Adjust the setting: Adjust the distance between the magnet and the elastic film;

[0019] Step 2: Sample collection: Insert the protective shell into the oil to be tested. The iron powder particles in the oil will be attracted to the outside of the elastic film due to the attraction of the magnetic block.

[0020] Step 3: Unlock: Drive the eccentric wheel to rotate by running the first step motor, so that the eccentric wheel moves away from the protrusion;

[0021] Step 4: Iron Powder Particle Determination: If the iron powder particles on the outer side of the elastic film exceed the set preset value, the attraction between the iron powder particles and the magnetic block will squeeze the elastic film inward and deform it. The connecting conductive sheet will be displaced and disconnected from the conductive wire. The detection circuit will be disconnected, and the control terminal will give a disconnection feedback signal, which means that the iron powder particles in the oil exceed the standard. If the iron powder particles on the outer side of the elastic film do not exceed the set preset value, the attraction between the iron powder particles and the magnetic block is insufficient to squeeze the elastic film inward and deform it. The detection circuit will be connected.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. Iron powder particles can be attracted to the outer surface of the elastic film by a magnetic block. Due to the attraction force of the magnetic block on the iron powder particles, the elastic film will deform inward and push the connecting conductive sheet to move, which will further disconnect the detection circuit. This indicates that the iron powder particles in the oil exceed the standard. Conversely, the iron powder particles in the oil do not exceed the standard.

[0024] 2. The position of the magnetic block can be adjusted, thereby adjusting the magnetic block's adsorption force on the iron powder particles on the outside of the elastic film, adapting to different application scenarios and requirements. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 A schematic diagram of the first embodiment for adjusting the position of the magnetic block;

[0027] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0028] Figure 4 for Figure 2 A schematic diagram of the side view structure;

[0029] Figure 5 This is a schematic diagram of a second embodiment for adjusting the position of the magnetic block.

[0030] The numbers in the diagram represent:

[0031] 1-Protective shell; 21-Second stepper motor; 22-Rotating shaft; 23-Bracket; 24-Straight rod motor; 3-Magnetic block; 41-First stepper motor; 42-Eccentric wheel; 5-Connecting conductive sheet; 51-Protrusion; 6-Elastic film; 7-Conductive wire; 8-Guide rod; 9-Connecting rod; 10-Control terminal. Detailed Implementation

[0032] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] This embodiment provides a technical solution: a device for detecting the iron content in hydraulic system oil, such as... Figure 1-4 As shown, it includes a protective shell 1, an elastic film 6, a detection circuit, a magnetic block 3, and a control terminal 10. The control terminal 10 is fixedly connected to the protective shell 1 by a connecting rod 9. During detection and sampling, the protective shell 1 can be inserted into the oil or to the bottom to sample the oil at the corresponding position. The control terminal 10 is equipped with a display screen and control buttons. The display screen is used to display the detection results, and the buttons are used to control the operation of the detection circuit.

[0035] The shape of the protective shell 1 can be set according to the needs, and can be set as a square structure or a cylindrical structure. A rectangular through hole is opened on one side of the protective shell 1. An elastic film 6 is covered and set in the rectangular through hole. The elastic film 6 has a certain elasticity. When subjected to pressure, the elastic film 6 will deform. The magnetic block 3 is set inside the protective shell 1, and the magnetic block 3 is located inside the elastic film 6. The magnetic field of the elastic film 6 covers the outside of the elastic film 6. In order to prevent the magnetic block 3 in other places from attracting iron powder particles, the magnetic block 3 in other places is far away from the protective shell 1.

[0036] The detection circuit includes two conductive wires 7, a connecting conductive sheet 5, a power supply, a resistor, and an indicator light. Both conductive wires 7 are laid inside the protective shell 1, and both conductive wires 7 pass through the connecting rod 9 and are connected to the control terminal 10. The ends of the two conductive wires 7 are located on both sides of the elastic film 6, and the end of the conductive wire 7 closest to the elastic film 6 is connected to a contact conductive sheet 71. The contact conductive sheet 71 is inclined and made of a soft conductive material to ensure that the conductive wire 7 is in contact with the connecting conductive sheet 5. The power supply, resistor, and indicator light are all located inside the control terminal 10.

[0037] Two conductive wires 7 are connected to the positive and negative terminals of the power supply, respectively. The resistor and indicator light are connected in series on the conductive wires 7. A connecting conductive sheet 5 is fixed to the inside of the elastic film 6. Each end of the connecting conductive sheet 5 has a protrusion 51. The thickness of the connecting conductive sheet 5 and the contact conductive sheet 71 is 0.2-0.5 mm. The protrusion 51 can contact or disconnect from the contact conductive sheet 71, thereby energizing and disconnecting the detection circuit. The connecting conductive sheet 5 acts as a switch in the detection circuit, and the opening or closing of the connecting conductive sheet 5 is controlled by the elastic film 6. Specifically:

[0038] When the elastic film 6 is not subjected to an inward force exceeding a predetermined value, it will not be squeezed and deformed significantly. The protrusion 51 contacts the conductive sheet 71, the detection circuit is closed and energized, and the indicator light illuminates. When the elastic film 6 is subjected to an inward force exceeding a predetermined value, it will squeeze the connecting conductive sheet 5 inward, causing displacement. The connecting conductive sheet 5 will then disconnect from the conductive wire 7, the detection circuit will be disconnected, and the indicator light will turn off. The magnitude of the force exerted on the elastic film 6 is determined by the amount of iron powder particles adsorbed on its outer surface. When the number of iron powder particles reaches a certain predetermined value, the mutual attraction between the iron powder particles and the magnetic block 3 will squeeze and deform the elastic film 6.

[0039] To ensure the stability of the connecting conductive sheet 5 during movement, two guide rods 8 are provided. The two guide rods 8 are respectively fixed to the inner wall of the protective shell 1 on both sides of the elastic film 6, and the guide rods 8 slide through the protrusion 51, so that the connecting conductive sheet 5 can slide along the guide rods 8.

[0040] To avoid misjudgment caused by the oil squeezing the elastic film 6 during sampling, a positioning component is provided inside the protective shell 1 to restrict the connecting conductive sheet 5. There are two sets of positioning components, and the two sets of positioning components are located on both sides of the elastic film 6. The positioning components lock and unlock the connecting conductive sheet 5. The operation of the positioning components is controlled by the control terminal 10.

[0041] The positioning component includes a first stepper motor 41 and an eccentric wheel 42. The first stepper motor 41 is fixed to the inner wall of the protective shell 1, and the eccentric wheel 42 is fixed to the output end of the first stepper motor 41. When the first stepper motor 41 drives the eccentric wheel 42 to rotate, it adjusts the linear distance between the eccentric wheel 42 and the protrusion 51. When the distance between the eccentric wheel 42 and the protrusion 51 is the smallest, the eccentric wheel 42 abuts against the protrusion 51, and the eccentric wheel 42 can restrict the protrusion 51 from moving inward, which is the locked state. When the distance between the eccentric wheel 42 and the protrusion 51 is the largest, the eccentric wheel 42 will not restrict the movement of the connecting conductive sheet 5, and the connecting conductive sheet 5 can move inward due to the thrust of the elastic film 6, which is the unlocked state, and the content of iron powder particles can be detected.

[0042] Example 2

[0043] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figures 2-4 As shown, to better realize the present invention, the following arrangement is specifically adopted: the number of magnetic blocks 3 is at least two, and four magnetic blocks 3 are used in this embodiment. A rotating shaft 22 is rotatably installed inside the protective shell 1. A second stepper motor 21 that drives the rotating shaft 22 to rotate is installed inside the protective shell 1. The magnetic blocks 3 are fixed to the outer circumferential surface of the rotating shaft 22 by the bracket 23. The distance between the outer surface of the multiple magnetic blocks 3 and the rotating shaft 22 is gradually shortened. In this embodiment, the outer circumferential surface of the magnetic blocks 3 is arc-shaped.

[0044] In order to make reasonable use of space, the protective shell 1 in this embodiment is a cylindrical shell. At the same time, the rotating shaft 22 is eccentrically set inside the protective shell 1, which can prevent the magnetic blocks 3 corresponding to the elastic film 6 from adsorbing iron powder particles. The other magnetic blocks 3 are far away from the side wall of the protective shell 1 and will not adsorb iron powder particles.

[0045] The second stepper motor 21 drives the rotating shaft 22 to rotate, so that multiple magnetic blocks 3 can correspond to the positions of the elastic film 6 respectively. Since the distance between the outer surface of the multiple magnetic blocks 3 and the rotating shaft 22 is different, the attraction strength of each magnetic block 3 to the iron powder particles is also different, so as to adapt to different application scenarios and requirements.

[0046] Meanwhile, an area without the magnetic block 3 is provided on the rotating shaft 22. This area is in the neutral position. When adjusted to the neutral position, there is no magnetic block 3 on one inner side of the elastic film 6. Therefore, there is no attraction to the iron powder particles on the outer surface of the elastic film 6. The iron powder particles on the outer surface of the elastic film 6 can be easily removed, which facilitates the next test.

[0047] Example 3

[0048] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figure 5As shown, to further better realize the present invention, the following configuration is specifically adopted: the number of magnetic blocks 3 is one, and a straight rod motor 24 is installed inside the protective shell 1. The magnetic block 3 is fixed to the telescopic end of the straight rod motor 24. The straight rod motor 24 is controlled by the control terminal 10. When the telescopic end of the straight rod motor 24 retracts, it moves the magnetic block 3 away from the elastic film 6. The attraction of the magnetic block 3 to the iron powder particles on the outside of the elastic film 6 is adjusted by the distance of the magnetic block 3 away from the elastic film 6, thereby adapting to different usage scenarios and requirements. For example, if the distance between the magnetic block 3 and the elastic film 6 exceeds the preset value, the magnetic field of the magnetic block 3 does not cover the outside of the elastic film 6, which is a gap. It is not possible to attract the iron powder particles outside the elastic film 6. The iron powder particles on the outside of the elastic film 6 can be easily removed. The straight rod motor 24 is controlled by the control terminal 10.

[0049] Example 4

[0050] A detection method for the iron content detection device in hydraulic system oil based on Embodiment 2 or Embodiment 3 includes the following steps:

[0051] Step 1: Adjust the gear: Adjust the distance between the magnetic block 3 and the elastic film 6;

[0052] As needed, the distance between the magnetic block 3 and the elastic film 6 can be adjusted in either embodiment 2 or embodiment 3, while the positioning member is switched to the locked state to restrict the connecting conductive sheet 5 and avoid misjudgment during sampling.

[0053] Step 2: Sample collection: Insert the protective shell 1 into the oil to be tested. According to the testing standards, move the protective shell 1 in the oil as needed and set the sampling time. The iron powder particles in the oil will be attracted to the outside of the elastic film 6 by the attraction of the magnetic block 3.

[0054] Step 3: Unlock: By running the first step motor 41 to drive the eccentric wheel 42 to rotate, the eccentric wheel 42 moves away from the protrusion 51, and the connecting conductive plate 5 is no longer restricted by the eccentric wheel 42;

[0055] Step 4: Iron Powder Particle Determination: Since the number of iron powder particles is positively correlated with the deformation of the elastic film 6, if the number of iron powder particles on the outer side of the elastic film 6 exceeds the set preset value, the attraction between the iron powder particles and the magnetic block 3 will squeeze the elastic film 6 inward and deform it. The connecting conductive sheet 5 will be displaced and disconnected from the conductive line 7. The detection circuit will be disconnected, and the control terminal 10 will give a disconnection feedback signal, that is, it is determined that the number of iron powder particles in the oil exceeds the standard. If the number of iron powder particles on the outer side of the elastic film 6 does not exceed the set preset value, the attraction between the iron powder particles and the magnetic block 3 is insufficient to squeeze the elastic film 6 inward and deform it. The detection circuit will be connected, that is, it is determined that the number of iron powder particles in the oil does not exceed the standard.

[0056] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A device for detecting the iron content in hydraulic system oil, characterized in that: It includes a protective shell, an elastic film, a detection circuit, and a magnetic block; a rectangular through hole is opened on one side of the protective shell, the elastic film is covered and disposed in the rectangular through hole, and the magnetic block is disposed inside the protective shell, with the magnetic block located inside the elastic film; The detection circuit includes two conductive wires, a connecting conductive sheet, a power supply, a resistor, and an indicator light. The two conductive wires are respectively connected to the positive and negative terminals of the power supply, and the ends of the two conductive wires are located on both sides of the elastic film. The resistor and the indicator light are connected in series with the conductive wires. The connecting conductive sheet is fixed to the inside of the elastic film. When the elastic film is not subjected to an inward force exceeding a predetermined value, both ends of the connecting conductive sheet are in contact with the two conductive wires. When the elastic film is subjected to an inward force exceeding a predetermined value, the connecting conductive sheet is disconnected from the conductive wires. The conductive wire is connected to a contact conductive sheet at one end near the elastic film. The contact conductive sheet is inclined and is made of a soft conductive material. The connecting conductive sheet has protrusions at both ends. When the elastic film is not subjected to an inward force exceeding a predetermined value, the protrusions contact the contact conductive sheet. The device also includes positioning elements that restrict the connecting conductive sheet. There are two sets of positioning elements, each located on one side of the elastic film. These positioning elements lock and unlock the connecting conductive sheet. Each positioning element includes a first stepper motor and an eccentric wheel. The first stepper motor is fixed to the inner wall of the protective shell, and the eccentric wheel is fixed to the output end of the first stepper motor. When the first stepper motor drives the eccentric wheel to rotate, it adjusts the linear distance between the eccentric wheel and the protrusions.

2. The hydraulic system oil iron content detection device according to claim 1, characterized in that, The thickness of the connecting conductive sheet and the contact conductive sheet is 0.2-0.5 mm.

3. The hydraulic system oil iron content detection device according to claim 1, characterized in that, It also includes two guide rods, which are respectively fixed to the inner walls of the protective shell on both sides of the elastic membrane, and the guide rods slide through the protrusion.

4. The hydraulic system oil iron content detection device according to claim 1, characterized in that, It also includes a control terminal, which is fixedly connected to the protective shell by a connecting rod. The power supply, resistor and indicator light are all located inside the control terminal. The control terminal is equipped with a display screen, which is used to display the test results.

5. The hydraulic system oil iron content detection device according to claim 4, characterized in that, The number of magnetic blocks is one, and a straight rod motor is installed inside the protective shell. The magnetic block is fixed to the telescopic end of the straight rod motor, and the straight rod motor is controlled by a control terminal.

6. The hydraulic system oil iron content detection device according to claim 4, characterized in that, The number of magnetic blocks is at least two. A rotating shaft is rotatably installed inside the protective shell. A second stepper motor that drives the rotating shaft to rotate is installed inside the protective shell. The magnetic blocks are fixed to the outer circumferential surface of the rotating shaft by a bracket. The distance between the outer surface of the multiple magnetic blocks and the rotating shaft decreases one by one.

7. A detection method based on the hydraulic system oil iron content detection device according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Adjust the setting: Adjust the distance between the magnet and the elastic film; Step 2: Sample collection: Insert the protective shell into the oil to be tested. The iron powder particles in the oil will be attracted to the outside of the elastic film due to the attraction of the magnetic block. Step 3: Unlock: Drive the eccentric wheel to rotate by running the first step motor, so that the eccentric wheel moves away from the protrusion; Step 4: Iron Powder Particle Determination: If the number of iron powder particles on the outer side of the elastic film exceeds the preset value, the attraction between the iron powder particles and the magnetic block will cause the elastic film to be squeezed and deformed inward, resulting in displacement of the connecting conductive sheet and disconnection from the conductive wire. When the detection circuit is disconnected, the control terminal provides a disconnection feedback signal, indicating that the iron powder particles in the oil exceed the standard. If the iron powder particles on the outside of the elastic diaphragm do not exceed the set preset value, the attraction between the iron powder particles and the magnetic block is insufficient to squeeze and deform the elastic diaphragm inward, and the detection circuit is connected.

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