WO2010103824A1 - 硬質粒子の濃度検出方法、粒子の濃度検出方法およびその装置 - Google Patents
硬質粒子の濃度検出方法、粒子の濃度検出方法およびその装置 Download PDFInfo
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- WO2010103824A1 WO2010103824A1 PCT/JP2010/001697 JP2010001697W WO2010103824A1 WO 2010103824 A1 WO2010103824 A1 WO 2010103824A1 JP 2010001697 W JP2010001697 W JP 2010001697W WO 2010103824 A1 WO2010103824 A1 WO 2010103824A1
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Images
Classifications
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
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- G—PHYSICS
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0681—Purposely modifying particles, e.g. humidifying for growing
Definitions
- the present invention relates to a method for detecting the concentration of hard particles contained in a liquid, a method for detecting the concentration of particles, and an apparatus therefor.
- hard particles such as alumina, silica, and carbon are mixed in a liquid such as C heavy oil, which is a main fuel of marine diesel engines, as a residue of fluid catalytic cracking (FCC) during petroleum refining.
- C heavy oil which is a main fuel of marine diesel engines
- the fuel sampled from the liquid is filtered through a filter or the like, and the particles are detected by observation of the residue with a microscope or quantitative analysis.
- Patent Document 1 discloses a general technical level of a hard particle concentration detection method, a particle concentration detection method, and an apparatus therefor.
- particles such as alumina and silica do not have remarkable characteristics in conductivity and magnetism, so it is difficult to detect them electrically and magnetically, and since the particles are chemically stable substances, chemical reaction There is a problem that it is difficult to detect using. Furthermore, since liquids such as C heavy oil are highly viscous and opaque and contain particles such as various sludges in addition to alumina / silica particles, there has been a problem that even optical detection as in Patent Document 1 cannot be adequately handled.
- the present invention provides a hard particle concentration detection method for quantitatively and quickly grasping hard particles in a liquid, and particles for quantitatively and continuously grasping particles in a liquid It is an object of the present invention to provide a concentration detection method and apparatus therefor.
- the magnetic member and the corresponding member are immersed in a liquid that may contain hard particles, and at least one of the magnetic member and the corresponding member is pressed against the other to move the hard member in the liquid.
- the magnetic member is worn by the particles to generate magnetic particles, the concentration of magnetic particles generated in the sample liquid is measured, and the correlation between the magnetic particle concentration measured in advance and the concentration of hard particles in the liquid is shown. From the calibration curve, the concentration of magnetic particles is converted into the concentration of hard particles in the liquid, and the concentration of hard particles contained in the liquid is detected.
- hard particles in the liquid are sandwiched between the magnetic member and the corresponding member, and at least one of the magnetic member and the corresponding member is pressed and moved.
- the particle concentration detection method includes a magnetic particle generation unit that positions a magnetic member and a corresponding member in a liquid flow path that may contain particles, and a magnetic particle generation unit that is positioned in the same flow path as the magnetic particle generation unit.
- a particle concentration detection method comprising a magnetic particle measurement unit for measuring the concentration of magnetic particles in a liquid, When measuring the concentration of particles, press and move at least one of the magnetic member and the corresponding member against the other in the liquid, wear the magnetic member to generate magnetic particles, and then generate the magnetic particles generated in the liquid.
- the particle concentration is measured by the magnetic particle measuring unit, and the magnetic particle concentration is converted into the particle concentration in the liquid from the calibration curve indicating the correlation between the magnetic particle concentration measured in advance and the particle concentration in the liquid.
- the concentration of particles contained in the liquid is detected.
- the concentration of the magnetic particles contained in the liquid is measured in advance, and the magnetic particles generated in the liquid at the magnetic particle generator are measured. It is preferable to subtract the concentration of the magnetic particles contained in advance in the liquid from the concentration of the particles and convert it to the concentration of the particles.
- a magnetic member and a corresponding member are disposed in a flow path of a liquid that may contain particles, and at least one of the magnetic member and the corresponding member is pressed against the other in the liquid to move the magnetic member.
- a magnetic particle generating part for generating magnetic particles by wearing a member A magnetic particle measuring unit that is located in the same flow path as the magnetic particle generating unit and measures the concentration of the magnetic particles in the liquid; From the calibration curve showing the correlation between the concentration of magnetic particles measured in advance and the concentration of particles in the liquid, the concentration of magnetic particles by the magnetic particle measuring unit is converted to the concentration of particles in the liquid, and the particles contained in the liquid
- a control unit for detecting the concentration of.
- the particle concentration detection apparatus of the present invention it is preferable to include a preceding magnetic particle measurement unit that measures the concentration of magnetic particles that are located upstream of the magnetic particle generation unit and are included in the liquid in advance.
- the magnetic particle measurement unit includes a detection unit main body connected to the liquid flow channel, and the flow channel and the detection unit so that the liquid in the flow channel can be introduced into the detection unit main body.
- a movable partition that connects the inside of the main body, an excitation coil that is located outside the detection unit body, and an output coil that is located outside the detection unit body and generates an excitation voltage by the alternating current of the excitation coil
- a signal processing unit for measuring a change in phase difference between the excitation coil and the output coil.
- the detection unit main body of the magnetic particle measurement unit has a flow path on the inflow side toward the magnetic particle generation unit and a flow path on the discharge side discharged from the magnetic particle generation unit.
- the movable partition portion of the magnetic particle measuring unit includes an inflow side piston body disposed with respect to the inflow side flow path, an outflow side piston body disposed with respect to the outflow side flow path, and the inflow side piston body.
- An intermediate piston body disposed between the outflow side piston body, an inflow side piston body, an outflow side piston body, and a piston rod that reciprocates by placing the intermediate piston body;
- the piston rod moves in one direction
- the inflow side piston body and the intermediate piston body are switched to a state where the inflow side flow path is connected to the inside of the detection unit main body, and the liquid flowing through the inflow side flow path is detected.
- the piston rod is moved in the other direction, it is further switched to a state in which the flow path on the outflow side and the inside of the detection section main body are connected by the outflow side piston body and the intermediate piston body. It is preferable that the liquid flowing through the flow path is introduced into the detection unit main body.
- the flow path on the inflow side includes a temperature adjustment unit that adjusts the temperature on the inflow side and a flow rate adjustment unit that sends the liquid at a constant flow rate.
- the magnetic member is worn by the presence of hard particles in the liquid to generate magnetic particles, the concentration of the magnetic particles generated in the liquid is measured, and the magnetic curve is measured from the calibration curve. Since the concentration of particles is converted into the concentration of hard particles in the liquid and the concentration of hard particles contained in the liquid is detected, the hard particles in the liquid can be grasped quantitatively and quickly. Further, when the liquid is oil, it is possible to prevent a situation in which uninspected fuel is used and a situation in which a large amount of hard particles are suddenly supplied to the driving engine, thereby suppressing adverse effects on the driving engine.
- the concentration of hard particles is indirectly detected using magnetic particles generated by wear of the magnetic member, the operation and processing for directly detecting the hard particles by physically and chemically treating the liquid itself are unnecessary, The excellent effect that the hard particle
- the magnetic member is worn to generate magnetic particles, the concentration of the magnetic particles generated in the liquid is measured, and the concentration of the magnetic particles in the liquid is measured from the calibration curve. Since the concentration of particles contained in the liquid is detected by converting to the concentration of the particles, the particles in the liquid can be quantitatively grasped. At the same time, since the magnetic particle generation unit and the magnetic particle measurement unit are provided in the same flow path, the concentration of particles in the liquid can be continuously grasped. Further, when the liquid is oil, it is possible to prevent a situation in which uninspected fuel is used and a situation in which a large amount of particles are suddenly supplied to the drive engine, thereby suppressing adverse effects on the drive engine.
- the concentration of particles is indirectly detected using magnetic particles generated by wear of magnetic members, the operation and processing for directly detecting the particles by physically and chemically treating the liquid itself are unnecessary, which is preferable. In addition, it is possible to obtain an excellent effect that the particles in the liquid can be grasped quantitatively and continuously.
- FIG. 4 is a view taken along arrow IV-IV in FIG. 3. It is a conceptual diagram which shows the part of the magnetic member and corresponding member in another magnetic particle generation
- concentration detection apparatus of this invention Comprising: It is a whole conceptual diagram which shows the state which moved the piston upwards. It is a conceptual diagram which shows an example of a magnetic particle generation part. It is a conceptual diagram which shows the other example of a magnetic particle generation
- the embodiment of the method for detecting the concentration of hard particles measures a magnetic particle generator (magnetic powder generator) 1 for generating magnetic particles (magnetic powder) in a liquid and the concentration of magnetic particles in the liquid.
- a magnetic particle measuring unit 2 (see FIGS. 6 to 8) and a control unit 3 (see FIGS. 6 and 7) for processing the concentration of magnetic particles.
- the liquid is oil I will explain it.
- the magnetic particle generating unit 1 includes a driving unit 5 such as a motor having a rotating shaft 4 below, a holder unit 6 disposed on the driving unit 5 so as to surround the rotating shaft 4, and a holder unit connected to the rotating shaft 4.
- a wear plate corresponding member 11 and a plate-like magnetic member 12 are provided below the sleeve 8 by a fixing member 10 such as a nut.
- the drive unit 5 and the holder unit 6 are fixed to a pedestal (not shown) so that the rod unit 7, the sleeve 8 and the like are exposed downward. Further, the holder portion 6 is provided with a downward projecting portion 14 into which the container portion 13 can be inserted so that the container portion 13 such as a test tube containing oil S such as fuel can be attached. Further, an O-ring 15 is arranged with a groove on the outer periphery of the downward projection 14.
- the rod portion 7 has a length that can be accommodated in the container portion 13 together with the sleeve 8, the elastic member 9, the corresponding member 11, and the magnetic member 12 when the container portion 13 is disposed on the holder portion 6. It is configured to rotate. Further, on both sides of the rod portion 7, both side surfaces 7 a (see FIG. 4) are formed such that both sides of the outer periphery of the rod portion 7 are notched into a plane.
- the sleeve 8 forms an upper receiving portion 16 that supports the lower portion of the elastic member 9 and also forms a lower receiving portion 17 that contacts the corresponding member 11.
- the elastic member 9 is supported by the lower convex portion 14 of the holder portion 6 and biases the corresponding member 11 downward via the sleeve 8 to press the corresponding member 11 against the magnetic member 12.
- the pressing of the corresponding member 11 and the magnetic member 12 is preferably adjusted by changing the elastic member 9 such as a spring.
- the corresponding member 11 includes a hole (not shown) through which the rod portion 7 is inserted, and is arranged without following the rotation of the rod portion 7.
- the magnetic member 12 is a hole 18 (see FIG. 4), and a straight side portion 18a on both sides that can contact both side surfaces 7a below the rod portion 7 is formed in the hole 18 so as to follow the rotation of the rod portion 7.
- the magnetic member 12 is made of a material such as an iron-based material having magnetism
- the corresponding member 11 is made of a material such as carbon steel that is harder and harder to wear than the magnetic member 12.
- a groove 12 a facing the other member is formed in one of the corresponding member 11 and the magnetic member 12 (the magnetic member 12 in FIGS.
- the material of the magnetic member 12 is not limited to iron as long as magnetic particles (magnetic powder) having a predetermined particle diameter are formed by wear, and other materials may be used.
- the material of the corresponding member 11 may be another material as long as magnetic particles are generated from the magnetic member 12, or may be the same material as the magnetic member 12. Furthermore, the arrangement of the magnetic member 12 and the corresponding member 11 may be reversed.
- the magnetic particle generator 1 may be another example in which the configuration of the magnetic member 12 and the corresponding member 11 is changed.
- a shaft portion 19 rotated by a drive portion (not shown), a roller portion 20 located at the center of the shaft portion 19, and a fixing member (not shown).
- the plate portion 21 and the corresponding member is the other of the roller portion 20 and the plate portion 21.
- the shaft portion 23 is rotated by a drive portion (not shown), the rotating plate 24 is positioned at the tip of the shaft portion 23, and fixed to a fixing member (not shown).
- the corresponding member is configured to be either the rotating plate 24 or the plate portion 25.
- an eccentric pin 28 that is rotated by the drive unit 27, a connecting member 29 that converts the movement of the eccentric pin 28 into a reciprocating movement, and a reciprocating connection connected to the connecting member 29.
- a magnetic member comprising: a plate 30; a plate portion 31 fixed to a fixing member (not shown) and contacting the lower surface of the reciprocating plate 30; and an elastic member 32 such as a spring for pressing the reciprocating plate 30 against the plate portion 31. Is set to one of the reciprocating plate 30 and the plate portion 31, and the corresponding member is set to the other of the reciprocating plate 30 and the plate portion 31.
- the configuration of the magnetic particle measurement unit 2 is not particularly limited as long as it can measure the concentration of magnetic particles in ppm, but an example will be described.
- the magnetic particle measuring unit 2 as an example includes a fluid lead-in / out unit 33 and a detection unit 34 in the flow path L of the oil S that may contain magnetic particles, and the detection unit 34 includes a signal processing unit 35. Further, the signal processing unit 35 is connected to a concentration measuring unit 36 for converting the signal of the signal processing unit 35 into the concentration of magnetic particles.
- the fluid lead-in / out section 33 includes a cylindrical detection section main body 38 that forms an opening 37 in the flow path L, a piston 39 that slides inside the detection section main body 38 to lead in and out the oil S, and a forward and backward movement of the piston 39.
- a rotating body 40 (see FIG. 8) of the driving unit to be driven and a coil 41 of the detecting unit 34 disposed on the outer peripheral portion of the detecting unit main body 38 are provided.
- the flow path L may be a pipe, a tube, or the like, or any type as long as the oil S flows.
- the coil 41 of the detection unit 34 includes two excitation coils 41a and 41a wound in opposite directions and connected in series, and a detection coil disposed in proximity between the two excitation coils 41a and 41a. (Output coil) 41b.
- an AC voltage is applied to the excitation coil 41a
- an output signal of an AC voltage is generated in the detection coil 41b.
- the two exciting coils 41a and 41a and the detecting coil 41b have the same mutual inductance by adjusting the number of turns of the coil 41 and the distance between the coils 41 so that the mutual inductance is substantially equal. It is adjusted so that. Further, the number of exciting coils 41a and detecting coils 41b is not particularly limited.
- the coil 41 of the detection unit 34 includes one excitation coil 41c and a detection coil (output coil) 41d arranged close to the one excitation coil 41c.
- a detection coil output coil 41d
- the output signal of the alternating voltage (excitation voltage) of the detection coil 41d is adjusted to be small.
- the signal processing unit 35 is connected to the detection coil 41b and amplifies a weak waveform signal so as to obtain a magnetic particle detection signal or a correction detection signal from the output signal of the detection coil 41b as shown in FIG.
- a phase circuit 45 that is connected to the wave oscillation circuit 44 and shifts the phase of the sine wave, and an edge trigger circuit 46 that is connected to the phase circuit 45 and converts the sine wave into a rectangular wave are provided.
- the phase circuit 45 shifts the phase by 10 ° to 170 °, preferably 45 ° to 135 °, and more preferably about 90 ° in the state of non-detection of magnetic particles at the time of setting or adjustment.
- the phase circuit 45 may be positioned between the bandpass filter 43 and the signal processing device 47, and may shift the detection signal of magnetic particles and the detection signal for correction instead of the reference signal.
- the signal processing unit 35 includes a signal processing device 47 connected to the band-pass filter 43 and the edge trigger circuit 46, a low-pass filter 48 connected to the signal processing device 47 to convert an output signal into a DC voltage signal, An amplifier 49 that is connected to the low-pass filter 48 and amplifies the DC voltage signal, an AC signal transmission circuit 50 that is connected to the amplifier 49 and transmits only the fluctuation amount of the DC voltage signal due to the introduction and detection of the detection fluid, and an AC signal transmission circuit 50 and an amplifier 51 connected to 50.
- the signal processing device 47 is preferably a lock-in amplifier, but may be any device as long as it can measure a change in phase difference.
- concentration measuring unit 36 shown in FIGS. 6 and 7 is connected to the amplifier 51 of the signal processing unit 35 to convert the signal into the concentration of magnetic particles.
- control unit 3 for processing the concentration of the magnetic particles is connected to the concentration measuring unit 36 of the magnetic particle measuring unit 2, and the concentration of the magnetic particles measured by the magnetic particle measuring unit 2 is calculated in advance.
- the concentration of the hard particles in the oil S is converted into the concentration of the hard particles, and the concentration of the hard particles contained in the oil S is detected and displayed.
- the processing of the control unit 3 may be performed manually, and is not particularly limited.
- oil S such as fuel that may contain hard particles
- the oil S such as fuel to be inspected is not limited to heavy oil such as C heavy oil, and may be other oil S such as gasoline, kerosene, light oil and the like as long as it can contain hard particles.
- the use of the oil S is not limited to supply to a drive engine such as a ship, but may be supplied to various drive engines and equipment such as a turbine plant. Further, water or an aqueous solution may be used instead of oil, and it is not particularly limited as long as it can contain hard particles.
- the hard particles are non-conductive and non-magnetic particles contained in a liquid such as oil S or water and can wear the magnetic member 12, and are not limited to alumina, silica, carbon, or the like. Absent.
- a small amount of sampled oil S (sample) is set in the magnetic particle measuring unit 2, and the concentration (X) of the magnetic particles contained in the oil S in advance is measured (step S2).
- concentration (X) of the magnetic particles may be measured using another device.
- the oil S is continuously sampled from the sampling of the oil S to the setting to the magnetic particle measuring unit 2 via an oil supply device such as an oil supply channel. You may do it.
- the oil S (sample) is put into the container part 13 and the container part 13 is set in the magnetic particle generating part 1 and prepared (step). S3).
- the mouth portion of the container portion 13 containing the oil S is inserted into the downward convex portion 14 of the holder portion 6 so that the magnetic member 12 and the corresponding member 11 together with the rod portion 7 and the like are immersed in the oil S.
- the magnetic member and the corresponding member are immersed in the oil S similarly.
- the transition from the magnetic particle measuring unit 2 to the magnetic particle generating unit 1 may be performed manually or may be performed automatically via a transfer device such as a flow path or an on-off valve.
- the magnetic particle generating unit 1 is driven for a certain time to generate magnetic particles such as iron powder in the oil S (step S4).
- the drive unit 5 is driven to rotate the rod unit 7, the magnetic member 12 is rotated while pressing the corresponding member 11, and the hard member that has entered between the magnetic member 12 and the corresponding member 11 causes the magnetic member to rotate. 12 is worn to generate magnetic particles.
- the magnetic member 12 is similarly worn to generate magnetic particles such as iron powder.
- the viscosity of the oil S is kept constant, if the pressing surface pressure of the magnetic member 12 and the corresponding member 11 is appropriately maintained, only the hard particles having a certain size or more can be used as magnetic particles (iron powder). In the case of hard particles having a diameter smaller than that, the magnetic particles (iron powder) are not generated only by passing through the gap between the magnetic member 12 and the corresponding member 11.
- the magnetic particle generating unit 1 sets the magnetic particle in the magnetic particle measuring unit 2 and proceeds to the next processing.
- the transition from the magnetic particle generation unit 1 to the magnetic particle measurement unit 2 may be performed manually, or may be performed automatically via a transfer device such as a flow path or an on-off valve.
- the magnetic particle concentration unit 2 measures the concentration (Y) of the magnetic particles (step S5).
- the piston 39 of the fluid lead-in / out section 33 is continuously reciprocated to perform measurement processing and detection in a state where the oil S is introduced into the detection section main body 38.
- the measurement process in a state where the oil S is discharged from the inside of the head body 38 is alternately and continuously repeated, and the difference between the output value for the concentration of the magnetic substance and the output value for comparison is obtained by the AC signal transmission circuit 50 or the like.
- the moving average process is performed and the average value of the concentration of the magnetic particles is obtained via the concentration measuring unit 36.
- the signal processing device 47 combines the reference signal to remove noise, detects a phase difference between the correction detection signal and the reference signal, and converts it to a smooth DC voltage signal as a comparison output value by the low-pass filter 48. (D in FIG. 9) is input to the AC signal transmission circuit 50 through the amplifier 49.
- a detection signal of the magnetic material is acquired from the oil S through the detection coil 41b, the amplification circuit 42, and the band pass filter 43 (in FIG.
- a ′)) together with the exciting coil 41a, the sine wave oscillation circuit 44, the phase circuit 45 and the edge trigger circuit 46, a rectangular wave that shifts the phase by a predetermined angle and produces a constant phase difference at the same frequency as the excitation voltage.
- a reference signal is prepared (in FIG. 10, (B ′), the phase is shifted by about 90 °).
- the signal processing device 47 combines the reference signal to remove noise, detects the phase difference between the magnetic substance detection signal and the reference signal, and the low-pass filter 48 provides a smooth direct current as an output value for the magnetic substance concentration. It is converted into a voltage signal ((D ′) in FIG. 10) and input to the AC signal transmission circuit 50 via the amplifier 49.
- the AC signal transmission circuit 50 obtains a difference ⁇ V from the output value for the concentration of the magnetic particles and the output value for comparison so as to correct the output value for the concentration of the magnetic particles, as shown in FIG.
- the unit 36 converts the difference into the concentration of the magnetic particles by the correlation (function processing) with the concentration obtained in advance.
- 9C shows a state in which the detection signal of the magnetic particle is inverted by the reference signal, and conceptually shows that when this area is integrated, the result shown in FIG. 9D is obtained.
- (C ′) in FIG. 10 shows a state in which the detection signal of the magnetic particle is inverted by the reference signal, and conceptually shows that (D ′) in FIG. 10 is obtained when this area is integrated.
- the concentration (X) of the magnetic particles previously contained in the oil S is calculated from the concentration (Y) of the magnetic particles after being processed by the magnetic particle generating unit 1. Subtraction is performed (concentration of magnetic particles (Y) ⁇ concentration of magnetic particles (X)), and the concentration (Z) of magnetic particles actually generated in the magnetic particle generator 1 is calculated (step S6).
- the oil S linearly increased with the lapse of the polishing time as shown in FIG.
- the concentration of magnetic particles inside increased.
- the concentration of the hard particles previously contained in the oil S is changed (in the graph of FIG. 11, ⁇ ppm and about 1 / 2 ⁇ ppm are not included)
- the concentration of the hard particles is proportional to the generation concentration of the magnetic particles. It turns out that there is a relationship.
- the hard particle concentration and the magnetic particle (magnetic powder) concentration are plotted under the condition that the driving time (polishing time) of the magnetic particle generating unit 1 is constant, the magnetic particles as shown in FIG.
- a calibration curve showing the correlation between the concentration of the oil and the concentration of hard particles in the oil S is created. The calibration curve is applied in the following process.
- the concentration of the magnetic particles is converted into the concentration of hard particles in the oil S from the calibration curve (step S7, A to B in FIG. 12).
- the conversion into the concentration of the hard particles may be processed by registering the calibration curve in the control unit 3 in advance or may be processed manually.
- the concentration of hard particles is displayed on the display unit such as the control unit 3 (step S8), and the hard particles are detected in the oil S and the hard particles in the oil S are quantitatively and quickly grasped. Accordingly, when supplying oil S such as fuel to a driving engine such as a ship, the concentration of hard particles such as alumina and silica is determined on site, and the adverse effect on the driving engine due to the hard particles is avoided in advance. .
- the magnetic member 12 is worn by the presence of the hard particles in the oil S to generate the magnetic particles, and is generated in the oil S.
- the concentration of the magnetic particles is measured, the concentration of the magnetic particles is converted into the concentration of the hard particles in the oil S from the calibration curve, and the concentration of the hard particles contained in the oil S is detected. It does not take days to detect the concentration of hard particles, and the hard particles in the oil S can be grasped quantitatively and quickly. Therefore, the situation in which uninspected fuel is used and a large amount of hard particles Can be prevented from being suddenly supplied to the driving engine, and adverse effects on the driving engine can be suppressed.
- the concentration of hard particles is indirectly detected using magnetic particles such as iron powder generated by wear of the magnetic member 12, the hard particles are directly detected by physically and chemically treating the oil S itself. Therefore, it is possible to grasp the hard particles in the oil S quantitatively and quickly.
- the hard particles in the oil S are sandwiched between the magnetic member 12 and the corresponding member 11, and at least one of the magnetic member 12 and the corresponding member 11 is pressed against the other.
- the magnetic member 12 is appropriately worn by the presence of the hard particles in the oil S to generate magnetic particles. Therefore, the concentration of the hard particles contained in the oil S can be easily detected, and the hard particles in the oil S can be easily detected. The particles can be grasped more suitably.
- the embodiment describes a case where the liquid flowing in the flow path is fuel oil.
- the particle concentration detection apparatus 101 of the embodiment has a particle (without affecting the flow path L1 through which fuel oil flows from the fuel service tank A to the prime mover C via the buffer column B. It is arranged in the flow path L2 branched before the prime mover C so that the concentration of the hard particles) can be measured.
- the flow path L2 finally discharges the fuel measured by the particle concentration detector 101 to a sludge tank (not shown).
- the fuel supply pump D, the bypass filter E, the fine filter F, and the like are disposed in the flow path L1 from the fuel service tank A to the buffer column B, and the buffer column B to the prime mover C are arranged.
- a circulation pump G, a heater H, a filter I, and a viscosity adjuster J are disposed in the flow path L1. Further, the fuel service tank A from the buffer column B has a return flow path L3 to the fuel service tank A, and the motor C to the buffer column B has a return flow path L4 to the buffer column B.
- the particle concentration detection apparatus 101 is located at a place where the flow path L2 is folded, and generates a magnetic particle in the oil S, and the magnetic particle generator 102.
- the magnetic particle measurement section 103 that measures the concentration of the magnetic particles in the oil S
- the control section 104 that processes information from the magnetic particle measurement section 103, and the flow path L2a on the inflow side
- a temperature adjusting unit 105 that is located and adjusts the temperature on the inflow side
- a flow rate adjustment unit 106 of the gear pump 151 that is located in the inflow side flow path L2a and sends the oil S at a constant flow rate.
- the magnetic particle generating unit 102 includes a case unit 107 through which oil S in the flow path L2 flows in and out, a drive unit 108 such as a motor located above the case unit 107, and a drive unit 108.
- the disc-shaped rotary seat 110 located at the upper part in the case portion 107 is biased upward from the bottom surface of the case portion 107 through an elastic member 111 such as a spring via a connection shaft 109 connected to the rotary shaft 108a.
- Pedestal 112 positioned at the bottom of the case portion 107, a plate-like magnetic member 114 disposed on the lower surface of the rotating seat 110 via a fixing member 113 such as a fixing pin, and a fixing pin or the like on the upper surface of the pedestal 112 And a plate-like corresponding member 116 that is in surface contact with the lower surface of the magnetic member 114.
- a seal ring 117 is disposed between the case portion 107 and the connecting shaft 109 and between the case portion 107 and the pedestal 112 so that the oil S does not leak to the outside.
- the magnetic member 114 is made of a material such as an iron-based material having magnetism
- the corresponding member 116 is made of a material such as carbon steel that is harder and harder to wear than the magnetic member 114.
- the material of the magnetic member 114 is not limited to iron as long as magnetic particles having a predetermined particle diameter are formed by wear, and other materials may be used.
- the material of the corresponding member 116 may be another material as long as magnetic particles are generated from the magnetic member 114, or may be the same material as the magnetic member 114.
- the arrangement of the magnetic member 114 and the corresponding member 116 may be reversed.
- the magnetic particle generation unit 102 as shown in FIG. 16b.
- the case unit 118 in which the oil S in the flow path L2 flows in and out, and the driving of a motor or the like positioned above the case unit 118 are provided.
- a rod-shaped magnetic member 114a that is connected to the shaft 119a of the drive unit 119 and rotates within the case unit 118, and is biased to one side from the side surface of the case unit 118 via an elastic member 120 such as a spring;
- a corresponding member 116a on which a rod-shaped magnetic member 114a is externally fitted.
- the magnetic member 114a is made of a material such as an iron-based material having magnetism
- the corresponding member 116a is made of a material such as carbon steel that is harder and harder to wear than the magnetic member 114a.
- the material of the magnetic member 114a is not limited to iron as long as magnetic particles having a predetermined particle diameter are formed by wear, and other materials may be used.
- the material of the corresponding member 116a may be another material as long as magnetic particles are generated from the magnetic member 114a, or the same material as the magnetic member 114a. Further, the arrangement of the magnetic member 114a and the corresponding member 116a may be reversed.
- the magnetic particle generation unit 102 As shown in FIG. 16c, and another example is a case unit 122 in which the oil S in the flow path L2 flows in and out, and a drive of a motor or the like located above the case unit 122.
- a conversion unit 124 that converts the rotation of the shaft 123a of the drive unit 123 into a reciprocating motion using an eccentric pin or the like, and a rod-shaped magnetic member 114b that is connected to the conversion unit 124 and moves up and down in the case unit 122.
- a corresponding member 116b that is urged to one side through an elastic member 125 such as a spring from the side surface of the case portion 122 and externally fits the rod-shaped magnetic member 114b.
- the magnetic member 114b is made of a material such as an iron-based material having magnetism
- the corresponding member 116b is made of a material such as carbon steel that is harder and harder to wear than the magnetic member 114b.
- the material of the magnetic member 114b is not limited to iron as long as magnetic particles having a predetermined particle diameter are formed by wear, and other materials may be used.
- the material of the corresponding member 116b may be another material as long as magnetic particles are generated from the magnetic member 114b, or the same material as the magnetic member 114b.
- the arrangement of the magnetic member 114b and the corresponding member 116b may be reversed.
- the magnetic particle measuring unit 103 introduces the detection unit main body 127 connected to the flow path L2 of the oil S and the oil S of the flow path L2 into the detection unit main body 127, as shown in FIGS.
- the movable partition 128 that connects the flow path L2 and the inside of the detection unit main body 127, the two excitation coils 129 that are located outside the detection unit main body 127, and the outside of the detection unit main body 127, as possible.
- the output coil 130 adjacent to the excitation coil 129, the signal processing unit 131a connected to the excitation coil 129 and the output coil 130, and the concentration measurement unit 131b for converting the signal of the signal processing unit are provided.
- the detection unit main body 127 is disposed so as to communicate with the inflow side flow path L2a toward the magnetic particle generation unit 102 and the outflow side flow path L2b discharged from the magnetic particle generation unit 102 so as to connect both.
- One end of the detection section main body 127 extends outward from the inflow side flow path L2a, and the other end of the detection section main body 127 extends outward from the outflow side flow path L2b. .
- the movable partition portion 128 has an inflow side piston body 132 that can move as a part of the flow path outer wall surface with respect to the inflow side flow channel L2a, and a flow path outer wall surface with respect to the outflow side flow path L2b.
- An intermediate piston body 134 positioned between the inflow side piston body 132 and the outflow side piston body 133, the inflow side piston body 132, and the outflow side piston body 133.
- a piston rod 135 in which the intermediate piston body 134 is disposed, and a drive unit 136 including a rotating body, a crank, and the like so as to reciprocate the piston rod 135 are provided.
- a drive unit 136 including a rotating body, a crank, and the like so as to reciprocate the piston rod 135
- the state is switched to the connected state so that the oil S can flow through the flow path L2b on the outflow side and the detection unit main body 127. Further, the oil S introduced into the detection unit main body 127 on the inflow side flow path L2a is detected by the inflow side piston body 132 and the intermediate piston body 134 when the piston rod 135 is moved in the other direction (upward).
- the intermediate piston body 134 flows in the flow path L2a on the inflow side so that the oil S passes between the two exciting coils 129 and the output coil 130. Move from the inner wall surface of the flow path to the inner wall surface of the flow path L2b on the outflow side or from the inner wall surface of the flow path L2b on the outflow side to the inner wall surface of the flow path L2a on the inflow side. ing.
- the exciting coil 129 is two coils wound in opposite directions and connected in series, and is disposed at a predetermined interval.
- the output coil 130 is composed of two exciting coils 129. Are placed close together. When an AC voltage is applied to the excitation coil 129, an output signal of an AC voltage (excitation voltage) is generated in the output coil 130. Also, the two exciting coils 129 and the output coil 130 are adjusted so that the mutual inductances are substantially the same by adjusting the number of turns of the coils and the distance between the coils so that the mutual inductances are substantially equal. ing. Further, the numbers of excitation coils 129 and output coils 130 are not particularly limited, and may be one excitation coil 129 and one output coil 130.
- the signal processor 131a is connected to the output coil 130 and amplifies a weak waveform signal so as to obtain a magnetic particle detection signal or correction detection signal from the output signal of the output coil 130 as shown in FIG.
- the phase circuit 140 is connected to the wave oscillation circuit 139 to shift the phase of the sine wave, and the edge trigger circuit 141 is connected to the phase circuit 140 to convert the sine wave into a rectangular wave.
- the phase circuit 140 shifts the phase by 10 ° to 170 °, preferably 45 ° to 135 °, and more preferably around 90 ° in the state of no magnetic particle detection at the time of setting or adjustment.
- the phase circuit 140 may be positioned between the band-pass filter 138 and the signal processing device 142, and the magnetic particle detection signal and the correction detection signal may be shifted instead of the reference signal.
- the signal processing unit 131a includes a signal processing device 142 connected to the bandpass filter 138 and the edge trigger circuit 141, a low-pass filter 143 connected to the signal processing device 142 and converting an output signal into a DC voltage signal, An amplifier 144 that is connected to the low-pass filter 143 and amplifies the DC voltage signal, an AC signal transmission circuit 145 that is connected to the amplifier 144 and transmits only the fluctuation amount of the DC voltage signal due to the oil S being led in and out, and an AC signal transmission circuit And an amplifier 146 connected to 145.
- the signal processing device 142 is preferably a lock-in amplifier, but may be any device as long as it can measure a change in phase difference.
- the magnetic particle measuring unit 103 is arranged as a downstream magnetic particle measuring unit 103b in the outflow side channel L2b, and as a preceding magnetic particle measuring unit 103a in the inflow side channel L2a. It may be arranged.
- the subsequent magnetic particle measuring unit 103b includes a detection unit main body 127b connected only to the flow path L2 on the inflow side, and a piston 128b for introducing and extracting oil S from the flow path L2 to the detection unit main body 127b.
- Other configurations are the same as those shown in FIG.
- the magnetic particle measuring unit 103a in the previous stage includes a detection unit main body 127a connected only to the flow path L2 on the inflow side, and a piston 128a that guides oil S from the flow path L2 to the detection unit main body 127 and is excited.
- the signal from the coil 129 for output and the coil 130 for output is sent to the signal processing part of the magnetic particle measuring part 103b in the subsequent stage.
- the upper symbol ⁇ indicates that it is connected to the lower symbol ⁇ .
- control unit 104 shown in FIG. 14 and FIG. 15 is connected to the concentration measuring unit 131b of the magnetic particle measuring unit 103, and the magnetic particle concentration (concentration signal) measured by the magnetic particle measuring unit 103 is changed to a magnetic value.
- concentration of particles in oil S is converted.
- control unit 104 includes a display unit 147 that displays the concentration of particles, and a warning unit 148 that outputs a warning sound and a warning display.
- the oil S linearly increases with the lapse of the polishing time. It is clear that the concentration of the magnetic particles increases, and the concentration of the particles previously contained in the oil S is changed to ⁇ ppm, about ⁇ / 2 ppm, and no particles (0 ppm) as shown in FIG. Testing has shown that the concentration of particles and the concentration of magnetic particles are similarly proportional. For this reason, the calibration curve of the control unit 104 compares the concentration of particles (hard particles) with the concentration of magnetic particles (magnetic powder) under the condition that the driving time (polishing time) of the magnetic particle generator 102 is constant. Has been created.
- the temperature adjustment unit 105 includes a thermometer 149 positioned upstream of the inflow side flow path L2a, and a cooling positioned between the thermometer 149 and the magnetic particle measurement unit 103 so as to cool the inflow side flow path L2a.
- a fan 150a and air cooling fins 150b are provided.
- the flow rate adjusting unit 106 is configured by a gear pump 151 located between the temperature adjusting unit 105 and the magnetic particle measuring unit 103.
- a thermometer 152 and a pressure gauge 153 are disposed between the magnetic particle measuring unit 103 and the magnetic particle generating unit 102 in the flow path L2a on the inflow side.
- the oil S When inspecting oil (specimen) S such as fuel that may contain particles, the oil S is caused to flow into the particle concentration detection device 101 from the flow path L2 branched before the prime mover C (step S11 in FIG. 19).
- the oil S such as fuel as a specimen is not limited to heavy oil such as C heavy oil, and may be other oil such as gasoline, kerosene, and light oil as long as it can contain particles.
- the use of the oil S is not limited to supply to the prime mover C such as a ship, and may be supplied to various drive engines and equipment such as a turbine plant. Further, water or an aqueous solution may be used in place of the oil S, and it is not particularly limited as long as it can contain particles.
- the particles are non-conductive and non-magnetic hard particles contained in a liquid such as oil S or water, and can wear the magnetic member 114, and are not limited to alumina, silica, carbon or the like. Absent.
- the temperature of the oil (specimen) S is measured by the thermometer 149 of the temperature adjustment unit 105, and based on the temperature of the oil S, the cooling fan 150 a etc.
- the temperature is cooled and the temperature of the oil S is adjusted (step S12).
- the temperature of the oil S is hundreds of degrees, so the measurement by the magnetic particle measuring unit 103, the magnetic particle measuring unit 103, and the magnetic It is preferable to cool to 40 to 60 degrees so as not to affect the durability of the particle generation unit 102.
- the flow rate adjustment unit 106 of the gear pump 151 controls the oil (specimen) S to flow at a constant flow rate and performs pressure reduction (step S13), and the measurement by the magnetic particle measurement unit 103 and the magnetic particle generation unit 102 are performed. Is to be performed stably.
- step S14 when the oil (specimen) S passes through the magnetic particle measuring unit 103 in the flow path L2 on the inflow side (upstream side) (step S14), the piston rod 135 is moved in one direction (downward in FIG. 14). Then, the inflow side piston body 132 and the intermediate piston body 134 are switched to a state in which the inflow side flow path L2a is connected to the inside of the detection unit main body 127, and the oil S flowing from the inflow side flow path L2a to the magnetic particle generation unit 102 is detected. The concentration signal of the magnetic particles introduced into the part main body 127 and previously contained in the oil S is measured.
- the driving unit 108 is driven to press the magnetic member 114 against the corresponding member 116 via the connecting shaft 109, the rotating seat 110, and the like. While rotating, the magnetic member 114 is abrasively worn by the particles entering between the magnetic member 114 and the corresponding member 116 to generate magnetic particles in the oil S. Also, in the case of another configuration of the magnetic particle generation unit 102 shown in FIG. 16b or another configuration of the magnetic particle generation unit 102 shown in FIG. 16c, the magnetic members 114a and 114b are similarly subjected to abrasive wear and the oil S Magnetic particles are generated inside.
- the viscosity of the oil S is kept constant, if the pressing surface pressure of the magnetic member 114 and the corresponding member 116 is appropriately maintained, only the magnetic particles (hard particles) having a certain size or more can be obtained. (Iron powder) is generated, and particles having a diameter smaller than that pass only through the gap between the magnetic member 114 and the corresponding member 116 and do not generate magnetic particles. Similarly, in the case of the magnetic members 114a and 114b and the corresponding members 116a and 116b, magnetic particles (iron powder) are generated only by particles having a certain size or larger, and magnetic particles are not generated by particles having a smaller diameter.
- step S16 when the oil (specimen) S passes through the magnetic particle measuring unit 103 in the flow path L2 on the outflow side (downstream side) (step S16), the piston rod 135 is moved in the other direction (upward direction in FIG. 15). Then, the outflow side piston body 133 and the intermediate piston body 134 are switched to a state in which the outflow side flow path L2b is connected to the inside of the detection unit main body 127, and the oil S flowing from the magnetic particle generation unit 102 to the outflow side flow path L2b is detected. It is introduced into the main part 127 and the concentration signal of the magnetic particles on the outflow side is measured.
- the oil S After detecting the concentration of the magnetic particles in the outflow side flow path L2b, the oil S is returned to the outflow side flow path L2b through the movement of the movable partition 128 of the magnetic particle measuring unit 103, and the outflow side flow. It discharges
- concentration of a magnetic particle is the measurement in the state which introduced the oil S of the flow path L2a of the inflow side in the detection part main body 127 by reciprocating the piston rod 135 of the movable partition part 128 continuously.
- the measurement in the state where the oil S of the outflow side flow path L2b is introduced into the detection unit main body 127 is alternately measured, and the oil S is obtained from the concentration (concentration signal) P2 of the outflow side magnetic particles as shown in FIG.
- the concentration (concentration signal) P1 of the magnetic particles contained in advance is subtracted to calculate the concentration (concentration signal) ⁇ S of the magnetic particles generated by the magnetic particle generation unit 102.
- concentration (concentration signal) P1 of the magnetic particles contained in advance is subtracted to calculate the concentration (concentration signal) ⁇ S of the magnetic particles generated by the magnetic particle generation unit 102.
- the position P1 is the position where the movable partition 128 of the magnetic particle measuring unit 103 introduces the oil S from the flow path L2a on the inflow side
- the position P2 is the movable partition of the magnetic particle measuring unit 103.
- the part 128 is a position where the oil S is introduced from the flow path L2b on the outflow side.
- the processing for measuring the concentration of the magnetic particles by the signal processing unit 131a and the concentration measuring unit 131b will be specifically described (see FIGS. 9 and 10).
- the oil S is supplied to the flow path on the inflow side.
- a correction detection signal is acquired from the detection unit main body 127 via the output coil 130, the amplifier circuit 137, and the bandpass filter 138 (FIG. 9A).
- a rectangular wave reference signal that causes a constant phase difference at the same frequency as the excitation voltage by shifting the phase by a predetermined angle by the excitation coil 129, the sine wave oscillation circuit 139, the phase circuit 140, and the edge trigger circuit 141 is prepared ( In FIG.
- the excitation coil 129, the sine wave oscillation circuit 139, the phase circuit 140, and the edge trigger circuit 141 shift the phase by a predetermined angle and have the same frequency as the excitation voltage.
- a rectangular wave reference signal that causes a phase difference is prepared (in FIG. 10, (B ′), the phase is shifted by about 90 °).
- the signal processing unit 142 adjusts the reference signal to remove noise, detects the phase difference between the magnetic particle detection signal and the reference signal, and the low-pass filter 143 provides a smooth direct current as an output value for the concentration of the magnetic particles. It is converted into a voltage signal ((D ′) in FIG. 10) and input to the AC signal transmission circuit 145 via the amplifier 144.
- the AC signal transmission circuit 145 obtains the difference ⁇ V from the output value for the concentration of the magnetic particles and the output value for comparison so as to subtract the concentration of the magnetic particles previously contained in the flow path L2 as shown in FIG.
- the measured value is sent to the concentration measuring unit 131b via the amplifier 146.
- the concentration measuring unit 131b converts the measured value of the difference into the concentration (concentration signal) ⁇ S of the magnetic particles by the correlation (function processing) with the concentration obtained in advance.
- 9C shows a state in which the detection signal of the magnetic particle is inverted by the reference signal, and conceptually shows that when this area is integrated, the result shown in FIG. 9D is obtained.
- (C ′) in FIG. 10 shows a state in which the detection signal of the magnetic particle is inverted by the reference signal, and conceptually shows that (D ′) in FIG. 10 is obtained when this area is integrated.
- the control unit 104 After calculating the magnetic particle concentration ⁇ S, the control unit 104 converts the magnetic particle concentration into the particle concentration in the oil S from the calibration curve, and displays the particle concentration on the display unit 147. When the particle concentration exceeds a predetermined threshold, the warning unit 148 outputs a warning sound, a warning display, or the like.
- the particle concentration may be directly converted from the stage of the difference ⁇ V of the AC signal transmission circuit 145 to the particle concentration without going through the processing of the concentration measuring unit 131b, or may be processed by other procedures. good.
- the predetermined threshold value can be appropriately set according to the allowable amount of particles that can flow into the prime mover C.
- the concentration of particles such as alumina and silica is monitored on site to avoid adverse effects on the driving engine due to the particles.
- the former stage magnetic particle measuring unit 103a located in the inflow side flow path L2a and the latter stage located in the outflow side flow path L2b.
- the magnetic particle concentration unit 103b separately measures the concentration (concentration signal) of the magnetic particles, and the concentration (concentration signal) of the magnetic particles contained in the oil S in advance from the concentration (concentration signal) of the magnetic particles on the outflow side. Subtraction is performed to calculate the concentration (concentration signal) of the magnetic particles generated in the magnetic particle generation unit 102, and then the control unit 104 converts the concentration of the magnetic particles into the concentration of particles in the oil S from the calibration curve.
- the process of measuring the concentration of magnetic particles by the magnetic particle measuring unit 103b shown in FIG. 18 will be described.
- the oil S is discharged from the detection unit main body 127 by the signal processing unit 131a, the oil S is detected by the detection unit main body.
- the difference ⁇ V of the AC signal transmission circuit 145 is obtained by comparison with the case where it is introduced into 127, and then the concentration of the magnetic particles is obtained from the difference ⁇ V by the concentration measuring unit 131b.
- the concentration of the magnetic particles is obtained in the same manner as the magnetic particle measuring unit 103b.
- the magnetic member 114 is worn by the presence of the particles in the oil S to generate magnetic particles.
- the concentration of generated magnetic particles is measured, the concentration of magnetic particles is converted into the concentration of particles in oil S from the calibration curve, and the concentration of particles contained in oil S is detected.
- the number of days is not required to detect the concentration of the oil, and the particles in the oil S can be grasped quantitatively.
- the magnetic particle generation unit 102 and the magnetic particle measurement unit 103 are provided in the same flow path L2, the concentration of particles in the liquid can be continuously grasped.
- the concentration of the particles is indirectly detected using magnetic particles such as iron powder generated by the wear of the magnetic member 114, the operation of directly detecting the particles by physically and chemically treating the oil S itself. And the processing can be eliminated, and the particles in the oil S can be preferably grasped quantitatively and continuously.
- the concentration of magnetic particles contained in the oil S is measured in advance, and the magnetic particle generator 102 When the concentration of magnetic particles previously contained in the oil S is subtracted from the concentration of the magnetic particles generated in the liquid, and converted into the concentration of the particles, only the magnetic particles generated in the oil S by the magnetic particle generating unit 102 are obtained. Since the concentration is measured, the particles in the oil S can be properly grasped.
- the detection unit main body 127 of the magnetic particle measurement unit 103 is disposed so as to communicate with the inflow side flow path L2a toward the magnetic particle generation unit 102 and the outflow side flow path L2b discharged from the magnetic particle generation unit 102.
- the movable partition portion 128 of the magnetic particle measuring unit 103 includes an inflow side piston body 132 disposed with respect to the inflow side flow path L2a and an outflow side piston body 133 disposed with respect to the outflow side flow path L2b.
- An intermediate piston body 134 disposed between the inflow side piston body 132 and the outflow side piston body 133, and a piston rod that reciprocates with the inflow side piston body 132, the outflow side piston body 133, and the intermediate piston body 134.
- a is connected to the inside of the detection unit main body 127, the oil S flowing through the flow path L2a on the inflow side is introduced into the detection unit main body 127, and when the piston rod 135 moves in the other direction,
- the piston body 133 and the intermediate piston body 134 are further switched to a state in which the outflow side flow path L2b and the inside of the detection unit main body 127 are connected, and the oil S flowing through the outflow side flow path L2b is detected from the outflow side flow path L2b.
- one magnetic particle measuring unit 103 can easily measure the concentration of magnetic particles contained in the liquid in advance, and the magnetic particle generating unit 102 can appropriately adjust the concentration of magnetic particles.
- the particles in the oil S can be suitably grasped by measuring.
- particle concentration detection method and apparatus of the present invention are not limited to the illustrated examples described above, and it is needless to say that various modifications can be made without departing from the scope of the present invention.
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Abstract
Description
粒子の濃度を計測する際には、液中で磁性部材と対応部材との少なくとも一方を他方に押圧して動かし、磁性部材を摩耗して磁性粒子を発生させ、次に液中に発生した磁性粒子の濃度を磁性粒子計測部で計測し、予め測定した磁性粒子の濃度と液中の粒子の濃度との相関関係を示す検量線から磁性粒子の濃度を液中の粒子の濃度に換算し、液中に含まれる粒子の濃度を検出するものである。
該磁性粒子発生部と同じ流路に位置して液中の磁性粒子の濃度を計測する磁性粒子計測部と、
予め測定した磁性粒子の濃度と液中の粒子の濃度との相関関係を示す検量線から、磁性粒子計測部による磁性粒子の濃度を液中の粒子の濃度に換算し、液中に含まれる粒子の濃度を検出する制御部とを備えるものである。
磁性粒子計測部の可動仕切部は、流入側の流路に対して配置される流入側ピストン体と、流出側の流路に対して配置される流出側ピストン体と、前記流入側ピストン体と流出側ピストン体との間に配置される中間ピストン体と、流入側ピストン体および流出側ピストン体並びに中間ピストン体を配して往復動するピストンロッドとを備え、
前記ピストンロッドが一方向に移動した際には、流入側ピストン体および中間ピストン体により流入側の流路と検出部本体内とを接続する状態に切り替え、流入側の流路を流れる液を検出部本体へ導入すると共に、前記ピストンロッドが他方向に移動した際には、流出側ピストン体および中間ピストン体により流出側の流路と検出部本体内とを接続する状態に更に切り替え、流出側の流路を流れる液を検出部本体へ導入するように構成することが好ましい。
2 磁性粒子計測部
11 対応部材
12 磁性部材
101 濃度検出装置
102 磁性粒子発生部
103 磁性粒子計測部
103a 磁性粒子計測部
103b 磁性粒子計測部
104 制御部
105 温度調整部
106 流量調整部
114 磁性部材
114a 磁性部材
114b 磁性部材
116 対応部材
116a 対応部材
116b 対応部材
127 検出部本体
127a 検出部本体
127b 検出部本体
128 可動仕切部
128a 可動仕切部
128b 可動仕切部
129 励磁用コイル
130 出力用コイル
131a 信号処理部
132 流入側ピストン体
133 流出側ピストン体
134 中間ピストン体
135 ピストンロッド
S 油(液)
Claims (9)
- 硬質粒子を含み得る液中に磁性部材と対応部材とを浸漬し、磁性部材と対応部材との少なくとも一方を他方に押圧して動かし、液中の硬質粒子により磁性部材を摩耗して磁性粒子を発生させ、試料の液中に発生した磁性粒子の濃度を計測し、予め測定した磁性粒子の濃度と液中の硬質粒子の濃度との相関関係を示す検量線から磁性粒子の濃度を液中の硬質粒子の濃度に換算し、液中に含まれる硬質粒子の濃度を検出することからなる硬質粒子の濃度検出方法。
- 磁性部材と対応部材との間に液中の硬質粒子を挟み込んで磁性部材と対応部材との少なくとも一方を他方に押圧して動かすことからなる請求項1に記載の硬質粒子の濃度検出方法。
- 粒子を含み得る液の流路に位置して磁性部材と対応部材とを配置する磁性粒子発生部と、該磁性粒子発生部と同じ流路に位置して液中の磁性粒子の濃度を計測する磁性粒子計測部とを備える粒子の濃度検出方法であって、
粒子の濃度を計測する際には、液中で磁性部材と対応部材との少なくとも一方を他方に押圧して動かし、磁性部材を摩耗して磁性粒子を発生させ、次に液中に発生した磁性粒子の濃度を磁性粒子計測部で計測し、予め測定した磁性粒子の濃度と液中の粒子の濃度との相関関係を示す検量線から磁性粒子の濃度を液中の粒子の濃度に換算し、液中に含まれる粒子の濃度を検出することからなる粒子の濃度検出方法。 - 磁性粒子発生部で磁性粒子を発生させる前に、液中に予め含まれる磁性粒子の濃度を測定し、磁性粒子発生部で液中に発生した磁性粒子の濃度から、液中に予め含まれる磁性粒子の濃度を減算し、粒子の濃度に換算することからなる請求項3に記載の粒子の濃度検出方法。
- 粒子を含み得る液の流路に磁性部材と対応部材とを配置し、液中で磁性部材と対応部材との少なくとも一方を他方に押圧して動かし、磁性部材を摩耗して磁性粒子を発生させる磁性粒子発生部と、
該磁性粒子発生部と同じ流路に位置して液中の磁性粒子の濃度を計測する磁性粒子計測部と、
予め測定した磁性粒子の濃度と液中の粒子の濃度との相関関係を示す検量線から、磁性粒子計測部による磁性粒子の濃度を液中の粒子の濃度に換算し、液中に含まれる粒子の濃度を検出する制御部とを備えてなる粒子の濃度検出装置。 - 磁性粒子発生部の上流側に位置し且つ液中に予め含まれる磁性粒子の濃度を測定する前段の磁性粒子計測部を備えてなる請求項5に記載の粒子の濃度検出装置。
- 磁性粒子計測部は、液の流路に接続される検出部本体と、流路の液を前記検出部本体に導入し得るように流路と検出部本体内とを接続する可動仕切部と、前記検出部本体の外部に位置する励磁用コイルと、前記検出部本体の外部に位置して励磁用コイルの交流電流により励磁電圧を発生する出力用コイルと、前記励磁用コイルと前記出力用コイルの位相差の変化を計測する信号処理部とを備えてなる請求項5または6に記載の粒子の濃度検出装置。
- 磁性粒子計測部の検出部本体は、磁性粒子発生部へ向かう流入側の流路と、磁性粒子発生部から排出される排出側の流路とに対して連通可能に配置され、
磁性粒子計測部の可動仕切部は、流入側の流路に対して配置される流入側ピストン体と、流出側の流路に対して配置される流出側ピストン体と、前記流入側ピストン体と流出側ピストン体との間に配置される中間ピストン体と、流入側ピストン体および流出側ピストン体並びに中間ピストン体を配して往復動するピストンロッドとを備え、
前記ピストンロッドが一方向に移動した際には、流入側ピストン体および中間ピストン体により流入側の流路と検出部本体内とを接続する状態に切り替え、流入側の流路を流れる液を検出部本体へ導入すると共に、前記ピストンロッドが他方向に移動した際には、流出側ピストン体および中間ピストン体により流出側の流路と検出部本体内とを接続する状態に更に切り替え、流出側の流路を流れる液を検出部本体へ導入するように構成してなる請求項7に記載の粒子の濃度検出装置。 - 流入側の流路に、流入側の温度を調整する温度調整部と、液を一定の流量で送る流量調整部とを備えてなる請求項5に記載の粒子の濃度検出装置。
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KR1020117020984A KR101196251B1 (ko) | 2009-03-12 | 2010-03-10 | 경질 입자의 농도 검출 방법 |
CN201080020783XA CN102422142B (zh) | 2009-03-12 | 2010-03-10 | 硬质粒子的浓度检测方法 |
EP10750581.0A EP2407768A4 (en) | 2009-03-12 | 2010-03-10 | HARD PARTICLE CONCENTRATION DETECTION METHOD, PARTICLE CONCENTRATION DETECTION METHOD, AND ASSOCIATED DEVICE |
US13/256,119 US8659287B2 (en) | 2009-03-12 | 2010-03-10 | Hard particle concentration detecting method |
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EP2964929B1 (en) * | 2013-03-06 | 2020-02-12 | United Technologies Corporation | Oil system debris monitor system for a gas turbine engine |
DE102017001438B4 (de) * | 2017-02-15 | 2023-04-27 | Paragon Ag | Partikelsensor |
US11598325B2 (en) * | 2017-08-22 | 2023-03-07 | Lg Chem, Ltd. | Method for determining dispensing apparatus for heat-dissipating material |
CN108956396B (zh) * | 2018-03-23 | 2020-06-02 | 重庆山楂树科技有限公司 | 粉尘检测净化装置 |
CN108693086B (zh) * | 2018-03-30 | 2020-06-30 | 重庆山楂树科技有限公司 | 一种检测空气中粉尘浓度的设备 |
CN108535159B (zh) * | 2018-03-30 | 2020-06-30 | 重庆山楂树科技有限公司 | 一种粉尘浓度检测设备 |
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HK1168900A1 (en) | 2013-01-11 |
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