CN109884169B - Multifunctional oil liquid detection device and manufacturing method thereof - Google Patents
Multifunctional oil liquid detection device and manufacturing method thereof Download PDFInfo
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- CN109884169B CN109884169B CN201910252034.2A CN201910252034A CN109884169B CN 109884169 B CN109884169 B CN 109884169B CN 201910252034 A CN201910252034 A CN 201910252034A CN 109884169 B CN109884169 B CN 109884169B
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Abstract
The invention provides a multifunctional oil detection device and a manufacturing method thereof, wherein the multifunctional oil detection device comprises a sensing device, a detection function switching unit and an excitation-detection unit; the sensing device mainly comprises a tapered runner inlet, a runner, a sensing unit, a substrate, a model material and a runner outlet; the sensing device is fixed on the substrate through a model material, one end of the runner is provided with a conical runner inlet, and the other end of the runner is provided with a runner outlet; the sensing unit mainly comprises a planar inductance coil and an annular silicon steel sheet, the planar inductance coil is tightly attached to the annular silicon steel sheet, and a flow channel vertically penetrates through central holes of the planar inductance coil and the annular silicon steel sheet; the detection function switching unit switches three detection functions of an inductor, a resistor and a capacitor randomly according to needs. Compared with the detection device which can realize the same detection effect, the detection device of the invention reduces the complexity and the manufacturing cost of the device; a new method is provided for the rapid detection of oil liquid of machine equipment, and the fault diagnosis of the machine equipment is realized.
Description
Technical Field
The invention relates to the technical field of fault detection of an oil system of equipment, in particular to a multifunctional oil detection device and a manufacturing method thereof.
Background
The hydraulic system faults are mainly caused by pollution of hydraulic oil, pollutants in the hydraulic oil mainly come from pollutants remained and generated in the hydraulic system and pollutants invaded from the outside, and the pollutants are mainly solid particles, moisture and bubbles. The detection of the pollutants in the oil liquid can not only accurately evaluate the operating state of the hydraulic system, but also diagnose the system fault according to the properties of the pollutants. The existing inductance type detection device can only detect metal particles in hydraulic oil, the capacitance type detection device can detect water drops and air bubbles in the hydraulic oil, and the resistance type detection device can detect the metal particles and metal oxides in the hydraulic oil. If metal particles, metal oxides, water drops and air bubbles are to be detected comprehensively, three detection devices, namely an inductive detection device, a capacitive detection device and a resistive detection device, need to be arranged on the same device, so that the complexity of the detection device is greatly increased, and the cost of the device is increased.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a multifunctional oil detection device, which can be used as an inductive oil detection device, a capacitive oil detection device, or a resistive oil detection device, and has the characteristics of simple structure and low cost. Compared with the existing inductive and capacitive oil detection devices, the oil detection device has higher detection precision.
The technical means adopted by the invention are as follows:
a multifunctional oil liquid detection device comprises a sensing device, a detection function switching unit and an excitation-detection unit; the sensing device mainly comprises a tapered runner inlet, a runner, a sensing unit, a substrate, a model material and a runner outlet; the sensing device is fixed on the substrate through a model material, one end of the runner is provided with a conical runner inlet, the other end of the runner is provided with a runner outlet, and the runner vertically passes through a central hole of the sensing unit; the detection function switching unit can switch the three detection functions of the inductor, the resistor and the capacitor at will according to the requirements;
when the device is used, the excitation-detection unit applies excitation to the planar inductance coil during the inductance detection function and measures an inductance signal; applying excitation to the planar inductance coil during the resistance detection function, and measuring a resistance signal; and applying excitation to the planar inductance coil and the annular silicon steel sheet during the capacitance detection function, and measuring a capacitance signal.
Furthermore, the sensing unit mainly comprises a planar inductance coil and an annular silicon steel sheet, the planar inductance coil is tightly attached to the annular silicon steel sheet, and the flow channel vertically penetrates through central holes of the planar inductance coil and the annular silicon steel sheet.
Furthermore, the planar inductance coil is formed by winding an enameled wire, the inner diameter of the coil is 300-; the diameter of the flow channel is 300-2000 microns.
Furthermore, the diameter of the inner hole of the annular silicon steel sheet is the same as that of the inner hole of the planar inductance coil, and the thickness of the annular silicon steel sheet is 50-2000 micrometers.
Further, the annular silicon steel sheet can also be replaced by other conductive soft magnetic substances.
The invention also provides a manufacturing method of the multifunctional oil liquid detection device, which comprises the following steps:
s1: fixing the conical runner inlet mold, the runner mold, the tightly attached annular silicon steel sheet and the planar inductance coil on a substrate according to a set position; welding two lead ends of the planar inductance coil and one lead end of the annular silicon steel sheet with the insulated wire respectively;
s2: pouring a model material into the substrate, placing the substrate in an oven, and baking the substrate for 1 hour at the temperature of 80 ℃ to solidify the model material;
s3: the runner mold is extracted from the heated and cured model material to form a runner; punching the other end of the flow channel by using a puncher to manufacture a flow channel outlet;
s4: the lead ends of the planar inductance coil and the annular silicon steel sheet are connected with the excitation-detection unit through insulated wires, and alternating current excitation is applied to the planar inductance coil and the annular silicon steel sheet, so that signals of inductance, capacitance and resistance are detected simultaneously.
Further, the model material is polydimethylsiloxane or polymethyl methacrylate.
Compared with the prior art, the invention has the following advantages:
1. according to the multifunctional oil detection device, the planar inductance coil and the annular silicon steel sheet are combined, so that the functions of inductance, capacitance and resistance detection in three modes can be realized on the same detection device.
2. According to the multifunctional oil detection device, the plane inductance coil is used as an inductance type detection element, so that metal particles in hydraulic oil can be detected;
3. according to the multifunctional oil detection device, the planar inductance coil and the annular silicon steel sheet are used for carrying out resistance detection on metal particles and metal oxides in hydraulic oil;
4. according to the multifunctional oil detection device, the planar inductance coil and the annular silicon steel sheet can form a capacitor, and the edge effect of the capacitor is utilized to detect water drops and air bubbles in hydraulic oil;
5. according to the multifunctional oil detection device, the annular silicon steel sheet is designed, so that the detection precision of the inductive type, capacitive type and resistive type detection devices is increased.
Based on the reason, the invention can be widely popularized in the fields of oil system fault detection and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a view showing the structure of a detecting unit according to the present invention.
Fig. 2 is a structural view of a sensing unit of the present invention.
FIG. 3 is a system diagram of the detecting device and the sensing unit thereof according to the present invention.
Fig. 4 is a graph comparing the inductance detection signals for 100-and 110-micron iron particles implemented in the present invention.
FIG. 5 is a graph comparing the detection signals of the resistance of 190-200 μm copper particles implemented in the present invention.
FIG. 6 is a graph of the resistance detection signals for 110-120 μm water drop and 160-170 μm air bubble implemented by the device of the present invention.
In the figure: 1. a tapered flow channel inlet; 2. a flow channel; 3. a sensing unit; 4. a flow channel outlet; 5. a modeling material; 6. a substrate; 7. a planar inductor coil; 8. an annular silicon steel sheet; 9. a detection function switching unit; 10. an excitation-detection unit.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Examples
As shown in fig. 1, the present invention provides a multifunctional oil detecting device, which comprises a sensing device, a detecting function switching unit 9 and an excitation-detecting unit 10; the sensing device mainly comprises a tapered flow channel inlet 1, a flow channel 2, a sensing unit 3, a substrate 6, a model material 5 and a flow channel outlet 4. The sensing device is fixed on a substrate 6 through a model material 5, one end of a flow channel 2 is provided with a conical flow channel inlet 1, the other end of the flow channel 2 is provided with a flow channel outlet 4, and the flow channel 2 vertically passes through a central hole of a sensing unit 3; the diameter of the flow channel 2 is 300-; the detection function switching unit 9 can switch the three detection functions of the inductor, the resistor and the capacitor at will according to the requirements; when the device is used, oil with particle pollutants enters the detection device from the conical runner inlet 1, flows through the sensing unit 3 through the runner 2, and the excitation-detection unit 10 applies excitation to the planar inductance coil 7 during the inductance detection function and measures an inductance signal; when the resistance detection function is performed, excitation is applied to the planar inductance coil 7, and a resistance signal is measured; and when the capacitance detection function is performed, excitation is applied to the planar inductance coil 7 and the annular silicon steel sheet 8, a capacitance signal is measured, and finally the capacitance signal flows out from the flow passage outlet 4.
As shown in fig. 2, the sensing unit 3 mainly comprises a planar inductance coil 7 and a ring-shaped silicon steel sheet 8; the planar inductance coil 7 is tightly attached to the annular silicon steel sheet 8, and the flow channel 2 vertically penetrates through the central holes of the planar inductance coil 7 and the annular silicon steel sheet 8.
As a preferred embodiment of the invention, the planar inductance coil 7 is formed by winding an enameled wire, wherein the inner diameter of the coil is 300-. The diameter of the inner hole of the annular silicon steel sheet 8 is the same as that of the inner hole of the planar inductance coil 7, and the thickness is 50-2000 microns; the annular silicon steel sheets 8 can also be replaced by other conductive soft magnetic substances.
As shown in fig. 3, the detection function switching unit 9 can adjust the detection function of the detection device as needed. When the oil to be detected passes through the sensing unit 3, the excitation-detection unit 10 applies alternating current excitation to the planar inductance coil 7 and the annular silicon steel sheet 8, detects inductance, capacitance and resistance signals detected by the planar inductance coil 7 and the annular silicon steel sheet 8, and can analyze and process the signals.
As a preferred embodiment of the present invention, the excitation-detection unit 10 only needs to apply a high-frequency alternating current with a voltage of 1-2V and a frequency of 0.1-4.0MHz to the planar induction coil 7 under the inductance and resistance detection function. Under the inductance detection function, when ferromagnetic particles pass through the sensing unit 3, positive inductance signal pulses are generated due to the magnetization effect, and when non-ferromagnetic particles pass through the sensing unit 3, negative inductance signal pulses are generated due to the eddy current effect, so that the ferromagnetic particles and the non-ferromagnetic particles in the oil are distinguished and detected. Under the resistance detection function, when the metal particles and the metal oxide pass through the sensing unit 3, a positive resistance signal pulse is generated.
In a preferred embodiment of the present invention, the excitation-detection unit 10 applies a high-frequency ac current with a voltage of 1 to 2V and a frequency of 0.1 to 1.0MHz to the planar induction coil 7 and the annular silicon steel sheet 8 under the capacitance detection function. When water drops pass through the sensing unit 3, positive capacitance signal pulses are generated, and when bubbles pass through the sensing unit 3, negative capacitance signal pulses are generated, so that the water drops and the bubbles in the oil liquid are distinguished and detected.
As shown in fig. 4, the comparative graph of the inductance detection of 100-micron and 110-micron iron particles realized by the device of the present invention has significantly improved accuracy of the inductance detection compared with the inductance detection without silicon steel sheets.
As shown in FIG. 5, the comparative diagram of the resistance detection of 190-200 μm copper particles realized by the device of the present invention is significantly improved in the accuracy of the resistance detection compared with the resistance detection without silicon steel sheets.
As shown in FIG. 6, the signal diagram of capacitance detection for 110-120 μm water drop and 160-170 μm air bubble is realized by the device of the present invention.
According to the device, the annular silicon steel sheet 8 is tightly attached to the planar inductance coil 7, and the flow channel 2 vertically passes through a central hole of the planar inductance coil 7. The planar inductance coil 7 is used as an inductance type detection element for detecting metal particles in hydraulic oil; the planar inductance coil 7 and the annular silicon steel sheet 8 can be used for carrying out resistance detection on metal particles and metal oxides in hydraulic oil; the planar inductance coil 7 and the annular silicon steel sheet 8 can form a capacitor, and water drops and air bubbles in hydraulic oil are detected by utilizing the edge effect of the capacitor; meanwhile, the design of the annular silicon steel sheet 8 also increases the detection precision of inductive, capacitive and resistive detection devices.
The invention also provides a manufacturing method of the multifunctional oil liquid detection device, which comprises the following steps:
s1: fixing the conical runner inlet mold, the runner mold, the tightly attached annular silicon steel sheet and the planar inductance coil on a substrate according to a set position; welding two lead ends of the planar inductance coil and one lead end of the annular silicon steel sheet with the insulated wire respectively;
s2: pouring a model material into the substrate, placing the substrate in an oven, and baking the substrate for 1 hour at the temperature of 80 ℃ to solidify the model material;
s3: the runner mold is extracted from the heated and cured model material to form a runner; punching the other end of the flow channel by using a puncher to manufacture a flow channel outlet;
s4: the lead ends of the planar inductance coil and the annular silicon steel sheet are connected with the excitation-detection unit through insulated wires, alternating current excitation is applied to the planar inductance coil and the annular silicon steel sheet, and detection of inductance, capacitance and resistance signals can be realized.
As a preferred embodiment of the invention, the model material is polydimethylsiloxane or polymethyl methacrylate, and the substrate material is glass or other materials which are not easy to deform under heat.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A multifunctional oil liquid detection device is characterized by comprising a sensing device, a detection function switching unit and an excitation-detection unit; the sensing device mainly comprises a tapered runner inlet, a runner, a sensing unit, a substrate, a model material and a runner outlet; the sensing device is fixed on the substrate through a model material, one end of the runner is provided with a conical runner inlet, the other end of the runner is provided with a runner outlet, and the runner vertically passes through a central hole of the sensing unit; the sensing unit mainly comprises a planar inductance coil and an annular silicon steel sheet, the planar inductance coil is tightly attached to the annular silicon steel sheet, and the flow channel vertically penetrates through central holes of the planar inductance coil and the annular silicon steel sheet; the detection function switching unit can switch the three detection functions of the inductor, the resistor and the capacitor at will according to the requirements;
when the device is used, the excitation-detection unit applies excitation to the planar inductance coil during the inductance detection function and measures an inductance signal; applying excitation to the planar inductance coil during the resistance detection function, and measuring a resistance signal; and applying excitation to the planar inductance coil and the annular silicon steel sheet during the capacitance detection function, and measuring a capacitance signal.
2. The multifunctional oil detection device according to claim 1, wherein the planar inductance coil is formed by winding an enameled wire, the inner diameter of the coil is 300-2000 microns, the wire diameter of the enameled wire is 50-200 microns, and the number of turns is 20-600 turns; the diameter of the flow channel is 300-2000 microns.
3. The multifunctional oil detection device according to claim 1, wherein the diameter of the inner hole of the annular silicon steel sheet is the same as that of the inner hole of the planar inductance coil, and the thickness of the annular silicon steel sheet is 50-2000 microns.
4. The multifunctional oil detection device according to claim 1, wherein the annular silicon steel sheet can be replaced by other conductive soft magnetic substances.
5. A manufacturing method of the multifunctional oil detection device based on any one of claims 1 to 4 is characterized by comprising the following steps:
s1: fixing the conical runner inlet mold, the runner mold, the tightly attached annular silicon steel sheet and the planar inductance coil on a substrate according to a set position; welding two lead ends of the planar inductance coil and one lead end of the annular silicon steel sheet with the insulated wire respectively;
s2: pouring a model material into the substrate, placing the substrate in an oven, and baking the substrate for 1 hour at the temperature of 80 ℃ to solidify the model material;
s3: the runner mold is extracted from the heated and cured model material to form a runner; punching the other end of the flow channel by using a puncher to manufacture a flow channel outlet;
s4: connecting the lead ends of the planar inductance coil and the annular silicon steel sheet with an excitation-detection unit through insulated wires, applying alternating current excitation to the planar inductance coil and the annular silicon steel sheet, and applying excitation to the planar inductance coil by the excitation-detection unit during the inductance detection function and measuring an inductance signal; applying excitation to the planar inductance coil during the resistance detection function, and measuring a resistance signal; and applying excitation to the planar inductance coil and the annular silicon steel sheet during the capacitance detection function, and measuring a capacitance signal.
6. The method of claim 5, wherein the mold material is polydimethylsiloxane or polymethylmethacrylate.
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| CN106383146B (en) * | 2016-08-29 | 2019-02-12 | 大连海事大学 | A kind of induction reactance formula oil liquid detection system and preparation method thereof |
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