CN107588816A - A kind of solid flowmeter measured using motor torque - Google Patents
A kind of solid flowmeter measured using motor torque Download PDFInfo
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- CN107588816A CN107588816A CN201711002283.3A CN201711002283A CN107588816A CN 107588816 A CN107588816 A CN 107588816A CN 201711002283 A CN201711002283 A CN 201711002283A CN 107588816 A CN107588816 A CN 107588816A
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- metering disk
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- main shaft
- reductor
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- 239000007787 solid Substances 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims description 30
- 230000005611 electricity Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 244000144985 peep Species 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
The present invention discloses a kind of solid flowmeter measured using motor torque, including cylinder type measuring chute, measuring chute are provided with upper cover plate, reductor and charging aperture are provided with upper cover plate；The input shaft bore of reductor and the output axis connection of measure motor, the output shaft of reductor are connected with main shaft；Charging starting taper and charging burden-guiding cone are sequentially provided with below charging aperture；Metering disk is provided with measuring chute, metering disk is connected with main shaft, the vertical uniform some blades of distribution of circumference of metering disk；Metering tray bottom is provided with burden-guiding cone, and main shaft is connected through burden-guiding cone with metering disk.The present invention is connected by measure motor with reductor, and reductor is connected by main shaft with metering disk and burden-guiding cone, the solid flowmeter mechanical structure is simple, metering will not be influenceed by the electromagnetic interference at scene, improve transmission efficiency, reduction simultaneously has the characteristics of accuracy of flow measurement is high because of zero point instability problem caused by complex mechanical structure.
Description
Technical field
The invention belongs to powdery and the solid flow metering installation of granular material, is related specifically to a kind of using motor turn
The solid flowmeter of square metering method.
Background technology
The form of powdery and granular solids mass flowmenter mainly has belt conveyer scale, spiral reamer scale, Weightlessness balance, rotor
Scale, impact flow meter and coriolis force flowmeter.Wherein coriolis force flowmeter is so that measuring principle is advanced, small volume, measures range are wide
With the advantage such as zero point stability, it is considered to be mass metrology equipment relatively advanced at present.
The core of coriolis force flow meters work principle is a measurement wheel, rotary shaft, driving and control system.Work as quilt
Survey material and enter measurement wheel in a manner of gravity above measurement wheel, after burden-guiding cone, by horizontal with atwirl measurement wheel edge
Direction is thrown away, while moves material when passing through measurement wheel, produces a rotation direction opposite effect power to measurement blade, i.e.,
Coriolis force (abbreviation coriolis force).The size of the power is directly proportional to by the quality of material, as long as therefore measuring the big of the power
It is small, by the instantaneous mass and cumulative amount that can be calculated material in measurement wheel.
Existing coriolis force flowmeter all includes such as multiple bearing blocks, shaft coupling, power transmission shaft, floating disc, reductor and electricity
The mechanical transmission mechanisms such as machine, and the sensor such as moment of torsion/pressure, rotating speed is as metering signal detection means.
Due to the machinery that existing coriolis force flowmeter is complicated, the transmission efficiency of transmission mechanism is low, is vulnerable to site environment
The factor such as influence of temperature, dust and cause the zero point of coriolis force flowmeter unstable, so as to influence measuring accuracy, and its power
The analog quantity and digital quantity signal of square and speed probe be vulnerable to live electromagnetic interference and caused by error in dipping.
The content of the invention
It is an object of the invention to provide a kind of solid flowmeter measured using motor torque, solves existing flowmeter
Complicated in mechanical structure, cause transmission efficiency low, easily influenceed by site environment, the problem of causing flowmeter measurement accuracy difference.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of solid flowmeter measured using motor torque, including cylinder type measuring chute, measuring chute are provided with upper cover plate,
Reductor and charging aperture are installed on upper cover plate；The input shaft bore of reductor and the output axis connection of measure motor, reductor
Output shaft is connected with main shaft；Charging starting taper and charging burden-guiding cone are sequentially provided with below charging aperture；
Measuring chute lower end is provided with discharging opening；
Metering disk is provided with measuring chute, metering disk is connected with main shaft, if the vertical uniform distribution cured leaf of the circumference of metering disk
Piece；
Burden-guiding cone is installed, burden-guiding cone bottom centre is provided with perforation, and main shaft runs through at metering disk bottom centre axial location
Perforation on burden-guiding cone is connected with metering disk；The cone bottom of burden-guiding cone and trying to get to the heart of a matter for metering disk are bolted to connection.
Further, the charging starting taper and charging burden-guiding cone are respectively positioned in measuring chute.
Further, connected between the charging aperture and upper cover plate by flange.
Further, the upper cover plate is provided with peep pole, is provided with peep pole and inspects blind patch.
Further, the output shaft of the reductor, main shaft and metering disk are concentric design.
Further, be equipped with keyway on the main shaft and burden-guiding cone, installation key respectively with the key on main shaft and burden-guiding cone
Groove is engaged.
Further, when measure motor driving reductor action, reductor drive metering disk and burden-guiding cone to turn by main shaft
Dynamic, material drops down onto metering disk by charging aperture through feeding starting taper, and material touches with the blade on metering disk under the influence of centrifugal force
Hit, the torque meter according to suffered by metering disk calculates mass flow Q.
Further, mass flow Q=M/ (ω * R2), M is the torque that metering disk is subject in formula, and ω is motor rotation
Angular speed, R be metering disk radius.
Further, during material movement, torque M that metering disk is subject to, torque M=9549*P/n, P is in the formula
The power of measure motor, n are the rotating speed of measure motor.
Further, the power P of the measure motor=1.732*U*I*cos φ/1000, U is metering electricity in the formula
Voltage when machine works, I are electric current when measure motor works.
Beneficial effects of the present invention：
Solid flowmeter in the present invention is connected by measure motor with reductor, and reductor is passed through into main shaft and metering
Disk connects with burden-guiding cone so that motor driven metering disk rotates, during mass flow measures, by the fortune for detecting motor
Row parameter, the flow of the material by the solid flowmeter can be calculated, the solid flowmeter has that mechanical structure is simple, transmission
Efficiency high, do not influenceed by live electromagnetic interference and because of zero point instability problem caused by complex mechanical structure, there is flow to survey
The characteristics of accuracy of amount is high, the present invention greatly simplify the structure of solid flowmeter, and be applied in motor torque in efflux of solids
There is far-reaching influence in terms of gauge amount.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, used required for being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is a kind of structural representation of solid flowmeter using motor torque metering in the present invention；
Fig. 2 is the explosive view of solid flowmeter in the present invention；
In accompanying drawing, the list of parts representated by each label is as follows：
1- measure motors, 2-F type reductors, 3- fixing bolts, 4- charging apertures, 5- charging starting tapers, 6- inspect blind patch,
7- blades, 8- main shafts, 9- measuring chutes, 10- metering disks, 11- burden-guiding cones, 12- discharging openings, 13- charging guide cones.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to shown in Fig. 1 and 2, a kind of solid flowmeter measured using motor torque, the solid flowmeter includes circle
Cartridge type measuring chute 9, measuring chute 9 are provided with upper cover plate, and upper cover plate is provided with peep pole and charging aperture 4, is hinged with and inspects on cover plate
Blind patch 6, for covering peep pole；Connected between charging aperture 4 and upper cover plate by flange, the lower section of charging aperture 4 is sequentially provided with charging
Starting taper 5 and charging guide cone 13, wherein the charging upside down of starting taper 5,13 positive placement location of charging guide cone, feed burden-guiding cone
The small end face of body 13 is connected with feeding the middle part of starting taper 5, avoids material from entering the problem of charging guide cone 13 is revealed；On
Also installation fills F types reductor 2, the upper end of F types reductor 2 installation measure motor 1, the output shaft of measure motor 1 and deceleration on cover plate
The input shaft bore of machine 2 is connected, and output shaft and the phase of main shaft 8 of reductor 2 are assembled, and are fixed using fixing bolt 3, are ensured
The stability that reductor 2 is connected with main shaft 8；
The lower end of measuring chute 9 is provided with discharging opening 12.
Metering disk 10 is provided with measuring chute 9, metering disk 10 is connected with main shaft 8, and is fixed using bolt, improves metering disk
10 stability being connected with main shaft 8, the vertical uniform some blades 7 of distribution of circumference of metering disk 10, the wherein output of reductor 2
Axle, main shaft 8 and metering disk 10 are concentric design.
Burden-guiding cone 11 is installed, burden-guiding cone 11 is used for directing material to metering at the axial centerline of the bottom of metering disk 10
The edge of disk, solid accumulation is avoided at the middle part of metering disk 10；The bottom centre of burden-guiding cone 11 is provided with perforation, and main shaft 8, which runs through, leads
The perforation of material cone 11 carries out bolt connection with metering disk 10；Cone bottom and the trying to get to the heart of a matter for metering disk 10 of burden-guiding cone 11 are bolted
Connection.
Be equipped with keyway on main shaft 8 and burden-guiding cone 11, by installation key respectively with the keyway on main shaft 8 and burden-guiding cone 11
It is engaged, when can prevent that main shaft 8 from rotating, relative slide occurs with burden-guiding cone 11.
When measure motor 1 drives reductor 2 to be acted, reductor 2 drives metering disk 10 and burden-guiding cone 11 by main shaft 8
Rotate, material drops down onto metering disk 10 by charging aperture 4 through feeding starting taper 5, and material can get to blade 7 under the influence of centrifugal force
On, so as to which metering disk 10 is thrown away by resistive torque opposite to the direction of rotation, subsequent material between adjacent two blade 7.
When material is fallen in metering disk, burden-guiding cone 11 rotates the margin guide to metering disk by material, avoids material heap
Product is in the middle part of metering disk.
The operation principle of the present invention：Start measure motor 1, drive main shaft 8 to rotate by reductor 2 and drive metering disk 10
Rotated with burden-guiding cone 11, material falls into the middle part of metering disk 10 through charging aperture 4, charging starting taper 5 and charging guide cone 13 successively, leads
Material cone 11 rotates flows material to the outer end of metering disk 10 in the horizontal direction, and under the influence of centrifugal force, material can be counted
The guiding of the blade 7 on disk 10 is measured, metering disk 10 is opposite with the direction of rotation of metering disk 10 by being produced during material movement
Active force, the active force are the output torque of motor.
The flow of material is can detect that by the device, in the process, power P=1.732*U*I* of measure motor
Cos φ/1000 (1), U is the voltage [V] when measure motor works in the formula (1), and I is electric current when measure motor works
[A]。
According to the power that measure motor is drawn in formula (1), during material movement being calculated, the wherein output of motor
Torque is the torque M that is subject to of metering disk, the torque M=9549*P/n (2) that metering disk is subject to, and P is metering electricity in the formula (2)
The power [kW] of machine, n are the rotating speed [r/min] of measure motor.
According to the torque M suffered by the metering disk drawn in formula (2), the flow Q, mass flow Q=of material can be calculated
M/(ω*R2) (3), in formula (3), M is the torque [Nm] that metering disk is subject to, and ω is the angular speed [rad/s] of motor rotation, R
For the radius [m] of metering disk.
According to formula (1), (2) and (3), and according to the rotating speed n of the measure motor angular velocity omegas rotated with measure motor
The π n/60 of relation, i.e. ω=2, can obtain mass flow Q=9549*1.732*30*U*I*cos φ/(1000* π n2*R2), wherein thing
Stream amount Q obtains that voltage U, electric current I are directly proportional when being worked respectively to measure motor, respectively with motor speed n square, metering disk
Radius R is inversely proportional.
The device is driven by motor, real-time output torque and rotating speed when can detect that motor operation, and then calculate
The flow of material.
Solid flowmeter in the present invention is connected by measure motor with reductor, and reductor is passed through into main shaft and metering
Disk connects with burden-guiding cone so that motor driven metering disk rotates, during mass flow measures, by the fortune for detecting motor
Row parameter, the flow of the material by the solid flowmeter can be calculated, the solid flowmeter has that mechanical structure is simple, transmission
Efficiency high, do not influenceed by live electromagnetic interference and because of zero point instability problem caused by complex mechanical structure, there is flow to survey
The characteristics of accuracy of amount is high, the present invention greatly simplify the structure of solid flowmeter, and be applied in motor torque in efflux of solids
There is far-reaching influence in terms of gauge amount.
Above content is only to design example and explanation of the invention, affiliated those skilled in the art
Various modifications or supplement are made to described specific embodiment or is substituted using similar mode, without departing from invention
Design or surmount scope defined in the claims, protection scope of the present invention all should be belonged to.
Claims (10)
- A kind of 1. solid flowmeter measured using motor torque, it is characterised in that：Including cylinder type measuring chute (9), measuring chute (9) upper cover plate is provided with, reductor (2) and charging aperture (4) are installed on upper cover plate；The input shaft bore of reductor (2) and metering The output axis connection of motor (1), the output shaft of reductor (2) are connected with main shaft (8)；Be sequentially provided with below charging aperture (4) into Expect starting taper (5) and charging guide cone (13)；Measuring chute (9) lower end is provided with discharging opening (12)；Metering disk (10) is provided with measuring chute (9), metering disk (10) is connected with main shaft (8), and the circumference of metering disk (10) is vertical It is uniformly distributed some blades (7)；Burden-guiding cone (11) is installed at metering disk (10) bottom centre axial location, burden-guiding cone (11) bottom centre is provided with perforation, Main shaft (8) is perforated on burden-guiding cone (11) and is connected with metering disk (10)；The cone bottom of burden-guiding cone (11) and the disk of metering disk (10) Bottom is bolted to connection.
- A kind of 2. solid flowmeter measured using motor torque according to claim 1, it is characterised in that：The charging Starting taper (5) and charging guide cone (13) are respectively positioned in measuring chute (9).
- A kind of 3. solid flowmeter measured using motor torque according to claim 1, it is characterised in that：The charging Mouth (4) is connected between upper cover plate by flange.
- A kind of 4. solid flowmeter measured using motor torque according to claim 1, it is characterised in that：The upper lid Plate is provided with peep pole, is provided with peep pole and inspects blind patch (6).
- A kind of 5. solid flowmeter measured using motor torque according to claim 1, it is characterised in that：The deceleration Output shaft, main shaft (8) and the metering disk (10) of machine (2) are concentric design.
- A kind of 6. solid flowmeter measured using motor torque according to claim 1, it is characterised in that：The main shaft (8) with being equipped with keyway on burden-guiding cone (11), installation key is engaged with the keyway on main shaft (8) and burden-guiding cone (11) respectively.
- A kind of 7. solid flowmeter measured using motor torque according to claim 1, it is characterised in that：When metering electricity Machine (1) driving reductor (2) action, reductor (2) drive metering disk (10) and burden-guiding cone (11) to rotate by main shaft (8), thing Material drops down onto metering disk (10) by charging aperture (4) through feeding starting taper (5), under the influence of centrifugal force on material and metering disk (10) Blade (7) collision, the torque meter according to suffered by metering disk (10) calculates mass flow Q.
- A kind of 8. solid flowmeter measured using motor torque according to claim 7, it is characterised in that：Mass flow Q=M/ (ω * R2), M is the torque that metering disk is subject in formula, and ω is the angular speed of motor rotation, and R is the radius of metering disk.
- A kind of 9. solid flowmeter measured using motor torque according to claim 8, it is characterised in that：Material movement During, torque M that metering disk is subject to, torque M=9549*P/n, P is the power of measure motor in the formula, and n is metering electricity The rotating speed of machine.
- A kind of 10. solid flowmeter measured using motor torque according to claim 9, it is characterised in that：The meter Power P=1.732*U*I*cos φ/1000 of motor are measured, U is voltage when measure motor works in the formula, and I is metering electricity Electric current when machine works.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711002283.3A CN107588816A (en) | 2017-10-24 | 2017-10-24 | A kind of solid flowmeter measured using motor torque |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711002283.3A CN107588816A (en) | 2017-10-24 | 2017-10-24 | A kind of solid flowmeter measured using motor torque |
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| CN107588816A true CN107588816A (en) | 2018-01-16 |
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| CN201711002283.3A Pending CN107588816A (en) | 2017-10-24 | 2017-10-24 | A kind of solid flowmeter measured using motor torque |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916784A (en) * | 2019-04-04 | 2019-06-21 | 东北大学 | A kind of measuring device and method rotating aspherical particle torque |
| CN112074709A (en) * | 2020-07-06 | 2020-12-11 | 河南丰博自动化有限公司 | Coriolis weighing scale and weighing method |
| CN113175966A (en) * | 2021-06-29 | 2021-07-27 | 常州江苏大学工程技术研究院 | Grain mass flow detection device and detection method thereof |
| CN113340367A (en) * | 2021-06-29 | 2021-09-03 | 安徽理工大学 | Coriolis powder flowmeter, calibration device and use method thereof |
| CN113503935A (en) * | 2021-06-29 | 2021-10-15 | 安徽理工大学 | Powder flowmeter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201637448U (en) * | 2010-04-08 | 2010-11-17 | 陈苏琦 | Flow metering device of powdery material |
| CN102472651A (en) * | 2009-07-07 | 2012-05-23 | 申克公司 | Mass flow rate measurement and measuring device having a central bulk goods feed |
| WO2013081440A1 (en) * | 2011-11-30 | 2013-06-06 | Prestasi Teknologi Sdn. Bhd. | Turbine type flow metering device |
| CN205228547U (en) * | 2015-11-25 | 2016-05-11 | 河南丰博自动化有限公司 | Adopt flexible power transmission element's side to put formula coriolis balance |
| CN207501999U (en) * | 2017-10-24 | 2018-06-15 | 安徽维鲸驱动科技有限公司 | A kind of solid flowmeter measured using motor torque |
-
2017
- 2017-10-24 CN CN201711002283.3A patent/CN107588816A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472651A (en) * | 2009-07-07 | 2012-05-23 | 申克公司 | Mass flow rate measurement and measuring device having a central bulk goods feed |
| CN201637448U (en) * | 2010-04-08 | 2010-11-17 | 陈苏琦 | Flow metering device of powdery material |
| WO2013081440A1 (en) * | 2011-11-30 | 2013-06-06 | Prestasi Teknologi Sdn. Bhd. | Turbine type flow metering device |
| CN205228547U (en) * | 2015-11-25 | 2016-05-11 | 河南丰博自动化有限公司 | Adopt flexible power transmission element's side to put formula coriolis balance |
| CN207501999U (en) * | 2017-10-24 | 2018-06-15 | 安徽维鲸驱动科技有限公司 | A kind of solid flowmeter measured using motor torque |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916784A (en) * | 2019-04-04 | 2019-06-21 | 东北大学 | A kind of measuring device and method rotating aspherical particle torque |
| CN109916784B (en) * | 2019-04-04 | 2020-04-14 | 东北大学 | Device and method for measuring torque of rotating non-spherical particles |
| CN112074709A (en) * | 2020-07-06 | 2020-12-11 | 河南丰博自动化有限公司 | Coriolis weighing scale and weighing method |
| CN112074709B (en) * | 2020-07-06 | 2023-09-12 | 河南丰博自动化有限公司 | Coriolis weighing scale and weighing method |
| CN113175966A (en) * | 2021-06-29 | 2021-07-27 | 常州江苏大学工程技术研究院 | Grain mass flow detection device and detection method thereof |
| CN113340367A (en) * | 2021-06-29 | 2021-09-03 | 安徽理工大学 | Coriolis powder flowmeter, calibration device and use method thereof |
| CN113503935A (en) * | 2021-06-29 | 2021-10-15 | 安徽理工大学 | Powder flowmeter |
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Application publication date: 20180116 |