CN110567536A - Magnetic coupling conversion type triboelectric rotor flow sensor - Google Patents

Magnetic coupling conversion type triboelectric rotor flow sensor Download PDF

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Publication number
CN110567536A
CN110567536A CN201910890075.4A CN201910890075A CN110567536A CN 110567536 A CN110567536 A CN 110567536A CN 201910890075 A CN201910890075 A CN 201910890075A CN 110567536 A CN110567536 A CN 110567536A
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China
Prior art keywords
hole
flow sensor
floater
magnetic coupling
end cover
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CN201910890075.4A
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Chinese (zh)
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CN110567536B (en
Inventor
程廷海
王健龙
王铮
杨伟雄
卢晓晖
周建文
宝音
殷梦飞
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Changchun University of Technology
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Changchun University of Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/22—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
    • G01F1/24—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters with magnetic or electric coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

the invention provides a magnetic coupling conversion type triboelectric rotor flow sensor, which aims to solve the technical problems that the conventional float flow sensor is complex in structure, difficult to detach and install, difficult to maintain and the like. The invention relates to a magnetic coupling conversion type triboelectric rotor flow sensor which comprises an outer shell, a floater component, a conversion mechanism and a screw I. The invention utilizes the magnetic coupling mechanism to convert the change of the flow and the height of the floater into the angle change of the mutual rotation of the two friction materials, and can accurately measure the flow by the output signal of the voltage pulse based on the principle of frictional electrification and electrostatic induction coupling. The magnetic coupling conversion type triboelectric rotor flow sensor provided by the invention has the advantages of simple structure, convenience in disassembly and assembly, high precision, capability of remotely transmitting signals and the like, and has wide application prospects in the fields of biomedical treatment, industrial pipeline safety detection, automatic control and the like.

Description

Magnetic coupling conversion type triboelectric rotor flow sensor
Technical Field
the invention designs a magnetic coupling conversion type triboelectric rotor flow sensor, and belongs to the field of flow measurement.
background
The flowmeter is used as an important metering device in flow monitoring, can directly reflect basic equipment of production energy consumption, and is a primary link for controlling energy consumption. The rotameter is widely used for flow monitoring as an important application means in production and life. The magnetic coupling conversion type flow sensor is the first choice for flow detection due to the characteristics of exquisite structure, high precision and the like.
The current magnetic coupling conversion type flow sensor is mainly classified into an in-situ type and an intelligent remote transmission type according to whether signals are remotely transmitted or not. The follow-up magnetic steel in the in-situ model is coupled with the magnetic steel in the rotor to rotate, and meanwhile, the pointer is driven to indicate the flow rate at the moment through the dial disc, but the signal remote transmission cannot be carried out. The intelligent remote transmission type servo magnetic steel is coupled with the magnetic steel in the floater to rotate, and simultaneously drives the sensing magnetic steel and the pointer to convert the change of the magnetic field into an electric signal through the magnetic sensor to detect the flow. However, the intelligent remote transmission type flow sensor usually needs a complex mechanical structure and is difficult to disassemble, assemble and maintain, and application and development of the intelligent remote transmission type flow sensor in the aspect of flow detection are greatly influenced.
Therefore, the design of the novel rotor flow sensor which has a simple structure, is convenient to disassemble and install, has high precision and can remotely transmit signals is very important for the intelligent development of energy conservation and emission reduction and flow detection.
Disclosure of Invention
The invention discloses a magnetic coupling conversion type triboelectric rotor flow sensor, which aims to solve the technical problems that the current magnetic coupling conversion type rotor flow sensor is complex in structure, difficult to detach, install and maintain and the like.
The technical scheme adopted by the invention is as follows:
The device comprises an outer shell, a floater assembly, a conversion mechanism and a screw I; the floater component is arranged on the outer shell through a screw I; the switching mechanism is installed in the shell body, supports and limits the shell body through the limiting hole II and is used for flow detection.
The outer shell comprises a conical pipe, a side end cover assembly, an upper end cover, a bolt assembly and a friction material I; the conical pipe comprises a measuring pipe, a measuring pipe mounting hole, a shell mounting hole, an air inlet hole, a limiting hole I and an air outlet; the measuring pipe mounting holes are uniformly distributed on two end faces of the measuring pipe; the shell mounting holes are uniformly distributed on the periphery of the upper end face of the conical tube.
The side end cover assembly comprises a bearing, a screw II and a bearing seat; the bearing seat is provided with a bearing mounting groove, a limiting hole II, a bearing seat mounting hole and a sealing boss I; the bearing is arranged on the bearing seat through a bearing mounting groove; the screw II is arranged on the bearing seat through a bearing seat mounting hole; the limiting hole II is arranged in the center of the bearing seat; the side end cover assembly is installed on the measuring pipe installation hole through a screw II, and the side end cover assembly and the measuring pipe are sealed through a sealing boss I.
The upper end cover is provided with a guider mounting seat, a threaded hole I, an upper end cover mounting hole, a through hole I and a sealing boss II; the guider mounting seats are distributed in the middle of the end face of the upper end cover; the threaded holes I are uniformly distributed around the guider mounting seat; the upper end cover mounting holes are uniformly distributed on the periphery of the lower end face of the upper end cover; the through holes I are uniformly distributed on the periphery of the upper end face of the upper end cover; the upper end cover is installed on the tapered tube through a bolt assembly, and the tapered tube is sealed in cooperation with the upper end cover through a sealing boss II.
The friction material I comprises an inner friction unit I, an outer friction unit I and a through hole II; the inner friction unit I and the outer friction unit I are both annular interdigital electrodes, and the interdigital index is n, n>3; the angle of the central angle of each interdigital of the internal friction unit I is alpha1the angle between two adjacent fingers is alpha2the radial length of the interdigital is a, and the value range of a is 10 mm<a<60 mm; the angle of the central angle of each interdigital of the external friction unit I1-5-2 is alpha3The angle between two adjacent fingers is alpha4The radial length of the interdigital is b, and the value range of b is 10 mm<b<60 mm; the difference between the internal friction unit I1-5-1 and the external friction unit I1-5-2 is alpha5Angle of dislocation of size, alpha5Is in the range of 5 DEG<α5<25; the through hole II1-5-3 is arranged in the center of the friction material I1-5; the friction material I1-5 is adhered to the sealing boss I1-2-3-4 through glue.
The floater component comprises a guider, a connecting rod, a floater end cover, a cylindrical magnet and a floater; the guider comprises a guider mounting hole, an air outlet hole, a slideway hole I, a slideway and a slideway hole II; the connecting rod comprises a guide sliding block and a connecting end I; the floater end cover comprises a floater end cover mounting hole and a connecting end II; the floater comprises a floater mounting hole and a limiting rod; the guide sliding block of the connecting rod penetrates through the slide way hole I and can freely slide in the slide way; the connecting end I penetrates through the slideway hole II and is connected to the float end cover mounting hole in a threaded manner; the cylindrical magnet is directly installed in the floater; the floater end cover is arranged on the floater mounting hole through a connecting end II thread; the floater assembly is installed on the limiting hole I through a limiting rod in a matched mode.
The conversion mechanism comprises a connecting shaft I, a disc-shaped magnet, a connecting shaft II and a friction material II; the connecting shaft I comprises a rotating shaft I, a limiting plate I and a threaded hole II; the connecting shaft II comprises a rotating shaft II, a rotating disc, a limiting plate II and a connecting end III; the friction material II comprises an inner friction unit II, an outer friction unit II and a through hole III; the disc-shaped magnet is arranged at the connecting end III of the connecting shaft II and is limited by the limiting plate II; and the connecting end III is in threaded connection with the threaded hole II and further limits the disc-shaped magnet through the limiting plate I.
The friction material II comprises an inner friction unit II, an outer friction unit II and a through hole III; the friction material II is adhered to the rotating disc through glue; the inner friction unit II and the outer friction unit II are all annular interdigital electrodes, the interdigital index is m, and the inner interdigital electrode and the outer interdigital electrode are completely aligned.
The conical tube is made of metal, glass or plastic; the friction material I is a metal material such as aluminum, copper and the like which has electropositivity and can conduct electricity; the friction material II is a material with strong isoelectric characteristics such as PTFE, PDMS or PVC.
The invention has the beneficial effects that:
in summary, the present invention provides a magnetic coupling conversion type triboelectric rotor flow sensor, which converts the linear displacement of an internal float into the mutual rotation of two friction materials with different electronegativities in an internal and external magnetic coupling manner. The inner friction unit I and the outer friction unit I of the friction material I have a certain dislocation angle, and the inner friction unit II and the outer friction unit II of the friction material II are completely aligned. The flow rate is in direct proportion to the mutual rotation angle of the two friction materials, and the flow rate change is evaluated by accumulating the pulse number of the voltage signals output by the two friction materials. Due to the existence of the dislocation angle, a certain phase difference exists between the voltage signal output by the outer friction unit and the voltage signal output by the inner friction unit, the steering of the two friction materials is judged according to the difference of the front and back sequence of the voltage pulse signals output by the two friction units, and then the increase or decrease of the flow is judged. The magnetic coupling conversion type triboelectric rotor flow sensor designed by the invention has the advantages of simple structure, convenience in disassembly and assembly, high precision, capability of remotely transmitting signals and the like, reduces the problems of mechanical abrasion and mechanical hysteresis caused by complex mechanical structure, and has wide application prospect in the fields of biomedical treatment, industrial pipeline safety detection, automatic control and the like.
Drawings
FIG. 1 is a partial cross-sectional view of the overall structure of a magnetically coupled switching triboelectric rotor flow sensor in accordance with the present invention;
FIG. 2 is a schematic structural diagram of an outer casing of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 3 is a schematic view of the overall structure of a tapered tube of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 4 is a partial cross-sectional view of a tapered tube structure of a magnetically coupled switching triboelectric rotor flow sensor in accordance with the present invention;
FIG. 5 is a schematic diagram of a side end cap assembly of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 6 is a top view of a bearing seat structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 7 is a bottom view of a bearing seat structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 8 is a top view of an upper end cap structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 9 is a bottom view of an upper end cap structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 10 is a schematic structural diagram of a friction material I of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 11 is a schematic view of a float assembly of a magnetically coupled switching triboelectric rotor flow sensor according to the present invention;
FIG. 12 is a top view of a guide structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 13 is a bottom view of a guide structure of a magnetically coupled switching triboelectric rotor flow sensor in accordance with the present invention;
FIG. 14 is a schematic view of a connecting rod structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 15 is a schematic diagram of a float cover structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 16 is a schematic diagram of a float structure of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
FIG. 17 is a schematic structural diagram of a switching mechanism of a magnetic coupling switching type triboelectric rotor flow sensor according to the present invention;
FIG. 18 is a schematic structural view of a connecting shaft I of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
Fig. 19 is a schematic structural diagram of a connecting shaft II of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention;
Fig. 20 is a schematic structural diagram of a friction material II of a magnetic coupling conversion type triboelectric rotor flow sensor according to the present invention.
Detailed Description
detailed description of the preferred embodimentthe present embodiment will be described with reference to fig. 1 to 20, and the present embodiment provides a specific embodiment of a magnetic coupling conversion type triboelectric rotor flow rate sensor, which is described as follows:
The magnetic coupling conversion type triboelectric rotor flow sensor comprises an outer shell 1, a floater assembly 2, a conversion mechanism 3 and a screw I4; the float assembly 2 is mounted on the outer shell 1 through a screw I4; the switching mechanism 3 is installed in the outer shell 1 and supports and limits the flow through a limiting hole II1-2-3-2 for flow detection.
The outer shell 1 comprises a conical pipe 1-1, a side end cover assembly 1-2, an upper end cover 1-3, a bolt assembly 1-4 and a friction material I1-5; the conical pipe 1-1 comprises a measuring pipe 1-1-1, a measuring pipe mounting hole 1-1-2, a shell mounting hole 1-1-3, an air inlet 1-1-4, an air inlet 1-1-5, a limiting hole I1-1-6 and an air outlet 1-1-7; the measuring tube 1-1-1 is used for packaging the conversion mechanism 3; the measuring pipe mounting holes 1-1-2 are uniformly distributed on two end faces of the measuring pipe 1-1-1 and used for mounting the side end cover assemblies 1-2; the shell mounting holes 1-1-3 are uniformly distributed on the periphery of the upper end face of the conical tube 1-1 and used for mounting the conical tube 1-1 and the upper end cover 1-3; the gas enters the conical pipe 1-1 through the gas inlet 1-1-4 and the gas inlet 1-1-5 in sequence, acts on the floater component 2 and flows out through the gas outlet 1-1-7; the limiting hole I1-1-6 is used for supporting and limiting the floater assembly 2.
The side end cover assembly 1-2 comprises a bearing 1-2-1, a screw II1-2-2 and a bearing seat 1-2-3; the bearing seat 1-2-3 is provided with a bearing mounting groove 1-2-3-1, a limiting hole II1-2-3-2, a bearing seat mounting hole 1-2-3-3 and a sealing boss I1-2-3-4; the bearing 1-2-1 is arranged on the bearing seat 1-2-3 through a bearing mounting groove 1-2-3-1; the screw II1-2-2 is arranged on the bearing seat 1-2-3 through the bearing seat mounting hole 1-2-3-3 and is used for connecting the side end cover assembly 1-2; the limiting hole II1-2-3-2 is arranged in the center of the bearing seat 1-2-3 and used for supporting and limiting the conversion mechanism 3; the side end cover assembly 1-2 is arranged on the measuring pipe mounting hole 1-1-2 through a screw II1-2-2 and sealed with the side end cover assembly 1-2 and the measuring pipe 1-1-1 through a sealing boss I1-2-3-4.
The upper end cover 1-3 is provided with a guider mounting seat 1-3-1, a threaded hole I1-3-2, an upper end cover mounting hole 1-3-3, a through hole I1-3-4 and a sealing boss II 1-3-5; the guider mounting seats 1-3-1 are distributed in the middle of the end face of the upper end cover 1-3 and used for mounting the floater component 2; the threaded holes I1-3-2 are uniformly distributed around the guider mounting seat 1-3-1 and are used for connecting the floater component 2; the upper end cover mounting holes 1-3-3 are uniformly distributed on the periphery of the lower end face of the upper end cover 1-3 and are used for connecting the upper end cover 1-3 with the conical pipe 1-1; the through holes I1-3-4 are uniformly distributed on the periphery of the upper end face of the upper end cover 1-3 and are used for connecting the outer shell 1 with the outside; the upper end cover 1-3 is installed on the conical pipe 1-1 through a bolt assembly 1-4, and the conical pipe 1-1 is sealed with the upper end cover 1-3 through a sealing boss II1-3-5 in a matched mode.
The friction material I1-5 comprises an inner friction unit I1-5-1, an outer friction unit I1-5-2 and a through hole II 1-5-3; the inner friction unit I1-5-1 and the outer friction unit I1-5-2 are all annular interdigital electrodes with the interdigital index of n, n>3; n =6 in the present embodiment; the angle of the central angle of each interdigital of the internal friction unit I1-5-1 is alpha1The angle between two adjacent fingers is alpha2The radial length of the interdigital is a, and the value range of a is 10 mm<a<60 mm; the angle of the central angle of each interdigital of the external friction unit I1-5-2 is alpha3The angle between two adjacent fingers is alpha4The radial length of the interdigital is b, and the value range of b is 10 mm<b<60 mm; the difference between the internal friction unit I1-5-1 and the external friction unit I1-5-2 is alpha5angle of dislocation of size, alpha5Is in the range of 5 DEG<α5<25 degrees for detecting the direction of the turning angle; the through hole II1-5-3 is arranged in the center of the friction material I1-5; the friction material I1-5 is adhered to the sealing boss I1-2-3-4 through glue; the friction material I1-5 is a friction material and can be used as a conductive electrode of a sensor; the friction material I1-5 may be a metal material that is electropositive and conductive, such as aluminum or copper, and the material of the friction material I1-5 in this embodiment is copper.
The floater component 2 comprises a guider 2-1, a connecting rod 2-2, a floater end cover 2-3, a cylindrical magnet 2-4 and a floater 2-5; the guider 2-1 comprises a guider mounting hole 2-1-1, an air outlet hole 2-1-2, a slide way hole I2-1-3, a slide way 2-1-4 and a slide way hole II 2-1-5; the connecting rod 2-2 comprises a guide sliding block 2-2-1 and a connecting end I2-2-2; the floater end cover 2-3 comprises a floater end cover mounting hole 2-3-1 and a connecting end II 2-3-2; the floater 2-5 comprises a floater mounting hole 2-5-1 and a limiting rod 2-5-2; the guide sliding block 2-2-1 of the connecting rod 2-2 penetrates through the slideway hole I2-1-3 and can freely slide in the slideway 2-1-4; the connecting end I2-2-2 penetrates through the slideway hole II2-1-5 and is in threaded connection with the mounting hole 2-3-1 of the float end cover, and is used for connecting the connecting rod 2-2 with the float end cover 2-3; the cylindrical magnet 2-4 is directly installed in the floater 2-5; the floater end cover 2-3 is arranged on the floater mounting hole 2-5-1 through a connecting end II2-3-2 thread and is used for sealing the cylindrical magnet 2-4; the floater component 2 is arranged on a limiting hole I1-1-6 through a limiting rod 2-5-2 in a matching mode and used for supporting and limiting the floater component.
The conversion mechanism 3 comprises a connecting shaft I3-1, a disc-shaped magnet 3-2, a connecting shaft II3-3 and a friction material II 3-4; the connecting shaft I3-1 comprises a rotating shaft I3-1-1, a limiting plate I3-1-2 and a threaded hole II 3-1-3; the connecting shaft II3-3 comprises a rotating shaft II3-3-1, a rotating disc 3-3-2, a limiting plate II3-3-3 and a connecting end III 3-3-4; the friction material II3-4 comprises an inner friction unit II3-4-1, an outer friction unit II3-4-2 and a through hole III 3-4-3; the disc-shaped magnet 3-2 is arranged at the connecting end III3-3-4 of the connecting shaft II3-3 and limited by a limiting plate II 3-3-3; the connecting end III3-3-4 is in threaded connection with the threaded hole II3-1-3 and used for connecting the connecting shaft II3-3 with the connecting shaft I3-1, and the disc-shaped magnet 3-2 is further limited by the limiting plate I3-1-2.
The friction material II3-4 comprises an inner friction unit II3-4-1, an outer friction unit II3-4-2 and a through hole III 3-4-3; the friction material II3-4 is adhered to the rotating disc 3-3-2 through glue, according to a triboelectric sequence, the friction material II3-4 can be made of materials with strong electronegativity, such as PTFE, PDMS, PVC, and the like, and the friction material II3-4 is made of PTFE in the embodiment; the inner friction unit II3-4-1 and the outer friction unit II3-4-2 are all annular interdigital electrodes, the fork index is m, m = n, and the inner interdigital electrode and the outer interdigital electrode are completely aligned; the angle of the central angle of each finger of the internal friction unit II3-4-1 is beta1The angle between two adjacent fingers is beta2The length of the interdigital in the radial direction is c; the angle of the central angle of each interdigital of the external friction unit II3-4-2 is beta3The angle between two adjacent fingers is beta4the radial length of the interdigital is d; alpha is alpha1=α2=α3=α4=β1=β2=β3=β4A = c, b = d; in the present embodiment, α1=30 °; the inner friction unit II3-4-1 and the inner friction unit I1-5-1 form a pair of friction pairs; the outer friction unit II3-4-2 and the outer friction unit I1-5-2 form another pair of friction pairs; due to the difference alpha between the internal friction unit I1-5-1 and the external friction unit I1-5-25The dislocation angle is large, so that when the inner friction unit II3-4-1 and the inner friction unit I1-5-1 are completely aligned in coincidence, the outer friction unit II3-4-2 is different from the outer friction unit I1-5-2 by alpha5The dislocation angle of magnitude; when the friction material II3-4 and the friction material I1-5 rotate mutually, the two groups of friction pairs can simultaneously output two groups of different voltage signals, and the two groups of output voltage signals have certain phase difference due to the existence of dislocation angles; according to the different sequence of the voltage output signals of the two friction pairs in the forward rotation and the reverse rotation, the increase or decrease of the flow is judged; the through hole II1-5-3 is arranged in the center of the friction material II 3-4; the switching mechanism 3 is arranged on the limiting hole II1-2-3-2 in a matching mode through a rotating shaft I3-1-1 and a rotating shaft II3-3-1 and used for flow detection.
the working principle is as follows: the magnetic coupling conversion type triboelectric rotor flow sensor comprises an outer shell, a floater component, a conversion mechanism and a screw I. The linear displacement of the floater component in the outer shell is converted into the rotary motion of the conversion mechanism by means of magnetic coupling conversion, and the change of the rotation angle of the conversion mechanism is detected to measure the flow. The conversion mechanism is mainly composed of two disk-shaped friction materials I and II with different electronegativities. The friction material I is divided into an inner friction unit I and an outer friction unit I, and the friction material II is divided into an inner friction unit II and an outer friction unit II. The inner friction unit I and the outer friction unit I have a certain dislocation angle, and the inner friction unit II and the outer friction unit II are completely aligned. The inner friction unit I and the inner friction unit II form a pair of friction pairs, and the outer friction unit I and the outer friction unit II form a pair of friction pairs. When the inner friction unit I and the inner friction unit II are completely aligned and coincident, a certain dislocation angle exists between the outer friction unit I and the outer friction unit II; because the two materials have different electron gaining and losing capabilities, the friction material I and the friction material II can generate two groups of output voltage pulse signals in the mutual rotating process, and the mutual rotating angle of the two friction materials is judged by accumulating the number of the output voltage pulse signals, so that the flow is judged. Due to the existence of the dislocation angle, the two groups of output voltage pulse signals have certain phase difference, and the steering of the rotation angle is judged according to the sequence of the two groups of voltage pulse signals, so that the increase or decrease of the flow is judged.
In summary, the invention provides a magnetic coupling conversion type triboelectric rotor flow sensor to solve the technical problems of complex structure, difficult disassembly and assembly, difficult maintenance and the like of the current float flow sensor. The magnetic coupling mechanism is utilized to convert the change of the flow and the height of the floater into the angle change of mutual rotation of two friction materials, and based on the principle of frictional electrification and electrostatic induction coupling, the flow can be accurately measured according to the quantity of voltage pulse output signals. The magnetic coupling conversion type triboelectric rotor flow sensor provided by the invention has the advantages of simple structure, convenience in disassembly and assembly, high precision, capability of remotely transmitting signals and the like, and has wide application prospects in the fields of biomedical treatment, industrial pipeline safety detection, automatic control and the like.

Claims (9)

1. A magnetic coupling conversion type triboelectric rotor flow sensor is characterized in that: the magnetic coupling conversion type triboelectric rotor flow sensor comprises an outer shell (1), a floater component (2), a conversion mechanism (3) and a screw I (4); the floater component (2) is arranged on the outer shell (1) through a screw I (4); the conversion mechanism (3) is installed in the outer shell (1) and supports and limits the position of the outer shell through a limiting hole II (1-2-3-2).
2. a magnetic coupling switching triboelectric rotor flow sensor according to claim 1, wherein: the outer shell (1) comprises a conical tube (1-1), a side end cover assembly (1-2), an upper end cover (1-3), a bolt assembly (1-4) and a friction material I (1-5); the conical pipe (1-1) comprises a measuring pipe (1-1-1), a measuring pipe mounting hole (1-1-2), a shell mounting hole (1-1-3), an air inlet (1-1-4), an air inlet (1-1-5), a limiting hole I (1-1-6) and an air outlet (1-1-7); the measuring pipe mounting holes (1-1-2) are uniformly distributed on two end faces of the measuring pipe (1-1-1); the shell mounting holes (1-1-3) are uniformly distributed on the periphery of the upper end face of the conical tube (1-1).
3. A magnetic coupling switching triboelectric rotor flow sensor according to claim 2, wherein: the side end cover assembly (1-2) comprises a bearing (1-2-1), a screw II (1-2-2) and a bearing seat (1-2-3); the bearing seat (1-2-3) is provided with a bearing mounting groove (1-2-3-1), a limiting hole II (1-2-3-2), a bearing seat mounting hole (1-2-3-3) and a sealing boss I (1-2-3-4); the bearing (1-2-1) is arranged on the bearing seat (1-2-3) through a bearing mounting groove (1-2-3-1); the screw II (1-2-2) is arranged on the bearing seat (1-2-3) through a bearing seat mounting hole (1-2-3-3); the limiting hole II (1-2-3-2) is arranged in the center of the bearing seat (1-2-3); the side end cover assembly (1-2) is mounted on the measuring pipe mounting hole (1-1-2) through a screw II (1-2-2).
4. A magnetic coupling switching triboelectric rotor flow sensor according to claim 2, wherein: the upper end cover (1-3) is provided with a guider mounting seat (1-3-1), a threaded hole I (1-3-2), an upper end cover mounting hole (1-3-3), a through hole I (1-3-4) and a sealing boss II (1-3-5); the guider mounting seats (1-3-1) are distributed in the middle of the end face of the upper end cover (1-3); the threaded holes I (1-3-2) are uniformly distributed around the guider mounting seat (1-3-1); the upper end cover mounting holes (1-3-3) are uniformly distributed on the periphery of the lower end face of the upper end cover (1-3); the through holes I (1-3-4) are uniformly distributed on the periphery of the upper end face of the upper end cover (1-3); the upper end cover (1-3) is installed on the conical pipe (1-1) through a bolt assembly (1-4).
5. A magnetic coupling switching triboelectric rotor flow sensor according to claim 2, wherein: the friction material I (1-5) comprises an inner friction unit I (1-5-1), an outer friction unit I (1-5-2) and a through hole II (1-5-3); the inner friction unit I (1-5-1) and the outer friction unit I (1-5-2) are all annular interdigital electrodes, and the index of the interdigital electrodes is n, n>3; the angle of the central angle of each interdigital of the internal friction unit I (1-5-1) is alpha1The angle between two adjacent fingers is alpha2the radial length of the interdigital is a, and the value range of a is 10 mm<a<60 mm; the angle of the central angle of each interdigital of the external friction unit I (1-5-2) is alpha3The angle between two adjacent fingers is alpha4The radial length of the interdigital is b, and the value range of b is 10 mm<b<60 mm; the difference between the internal friction unit I (1-5-1) and the external friction unit I (1-5-2) is alpha5Angle of dislocation of size, alpha5Is in the range of 5 DEG<α5<25 degrees; the through hole II (1-5-3) is arranged in the center of the friction material I (1-5); the friction material I (1-5) is adhered to the sealing boss I (1-2-3-4) through glue.
6. a magnetic coupling switching triboelectric rotor flow sensor according to claim 1, wherein: the floater component (2) comprises a guider (2-1), a connecting rod (2-2), a floater end cover (2-3), a cylindrical magnet (2-4) and a floater (2-5); the guider (2-1) comprises a guider mounting hole (2-1-1), an air outlet hole (2-1-2), a slideway hole I (2-1-3), a slideway (2-1-4) and a slideway hole II (2-1-5); the connecting rod (2-2) comprises a guide sliding block (2-2-1) and a connecting end I (2-2-2); the floater end cover (2-3) comprises a floater end cover mounting hole (2-3-1) and a connecting end II (2-3-2); the floater (2-5) comprises a floater mounting hole (2-5-1) and a limiting rod (2-5-2); the guide sliding block (2-2-1) of the connecting rod (2-2) penetrates through the slideway hole I (2-1-3) and can freely slide in the slideway (2-1-4); the connecting end I (2-2-2) penetrates through the slideway hole II (2-1-5) and is in threaded connection with the floater end cover mounting hole (2-3-1); the cylindrical magnet (2-4) is directly arranged in the floater (2-5); the floater end cover (2-3) is arranged on the floater mounting hole (2-5-1) through a connecting end II (2-3-2) in a threaded manner; the floater component (2) is arranged on the limiting hole I (1-1-6) in a matched mode through a limiting rod (2-5-2).
7. a magnetic coupling switching triboelectric rotor flow sensor according to claim 1, wherein: the conversion mechanism (3) comprises a connecting shaft I (3-1), a disc-shaped magnet (3-2), a connecting shaft II (3-3) and a friction material II (3-4); the connecting shaft I (3-1) comprises a rotating shaft I (3-1-1), a limiting plate I (3-1-2) and a threaded hole II (3-1-3); the connecting shaft II (3-3) comprises a rotating shaft II (3-3-1), a rotating disc (3-3-2), a limiting plate II (3-3-3) and a connecting end III (3-3-4); the friction material II (3-4) comprises an inner friction unit II (3-4-1), an outer friction unit II (3-4-2) and a through hole III (3-4-3); the disc-shaped magnet (3-2) is arranged at the connecting end III (3-3-4) of the connecting shaft II (3-3) and limited by the limiting plate II (3-3-3); the connecting end III (3-3-4) is in threaded connection with the threaded hole II (3-1-3), and the disc-shaped magnet (3-2) is further limited through the limiting plate I (3-1-2).
8. a magnetic coupling switching triboelectric rotor flow sensor according to claim 7, wherein: the friction material II (3-4) comprises an inner friction unit II (3-4-1), an outer friction unit II (3-4-2) and a through hole III (3-4-3); the friction material II (3-4) is stuck on the rotating disc (3-3-2) through gluing; the inner friction unit II (3-4-1) and the outer friction unit II (3-4-2) are all annular interdigital electrodes, the fork index is m, m = n, and the inner interdigital electrode and the outer interdigital electrode are completely aligned.
9. a magnetic coupling switching triboelectric rotor flow sensor according to claim 2 or claim 7, wherein: the conical pipe (1-1) is made of metal, glass or plastic; the friction materials I (1-5) are metal materials such as aluminum, copper and the like which have electropositivity and can conduct electricity; the friction material II (3-4) is a material with strong isoelectric characteristics such as PTFE, PDMS or PVC.
CN201910890075.4A 2019-09-20 2019-09-20 Magnetic coupling conversion type triboelectric rotor flow sensor Active CN110567536B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251506A (en) * 1990-12-14 1992-07-08 Platon Flow Control Leak detector
CN2503463Y (en) * 2001-11-14 2002-07-31 信息产业部电子第四十九研究所 High-precision micro-flow sensor
CN201138217Y (en) * 2007-12-27 2008-10-22 王万年 Flow detector
US7469601B2 (en) * 2006-04-03 2008-12-30 Tokyo Keiso Co. Ltd. Shiba Toho Bldg. Flow meter using digital signals
CN103017831A (en) * 2011-09-22 2013-04-03 克洛纳测量技术有限公司 Suspension flow meter with limit value switch
CN105356705A (en) * 2015-12-01 2016-02-24 北京爱尼机电有限公司 Coreless multilayer disc type motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251506A (en) * 1990-12-14 1992-07-08 Platon Flow Control Leak detector
CN2503463Y (en) * 2001-11-14 2002-07-31 信息产业部电子第四十九研究所 High-precision micro-flow sensor
US7469601B2 (en) * 2006-04-03 2008-12-30 Tokyo Keiso Co. Ltd. Shiba Toho Bldg. Flow meter using digital signals
CN201138217Y (en) * 2007-12-27 2008-10-22 王万年 Flow detector
CN103017831A (en) * 2011-09-22 2013-04-03 克洛纳测量技术有限公司 Suspension flow meter with limit value switch
CN105356705A (en) * 2015-12-01 2016-02-24 北京爱尼机电有限公司 Coreless multilayer disc type motor

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