CN103528925B - The method of the rotational viscosimeter with paddle type rotor and measurement granule fluid viscosity thereof - Google Patents
The method of the rotational viscosimeter with paddle type rotor and measurement granule fluid viscosity thereof Download PDFInfo
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- CN103528925B CN103528925B CN201310466944.3A CN201310466944A CN103528925B CN 103528925 B CN103528925 B CN 103528925B CN 201310466944 A CN201310466944 A CN 201310466944A CN 103528925 B CN103528925 B CN 103528925B
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- type rotor
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- torque sensor
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- 239000012530 fluid Substances 0.000 title claims abstract description 50
- 239000008187 granular material Substances 0.000 title claims abstract description 43
- 238000005259 measurement Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 11
- 244000309464 bull Species 0.000 claims abstract description 15
- 230000003028 elevating effect Effects 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
A kind of rotational viscosimeter with paddle type rotor and measure the method for granule fluid viscosity.Rotational viscosimeter comprises torque sensor, support, elevating mechanism, bull stick, rotary head, sample chamber, paddle type rotor, testing table, signal wire, control gear, paddle type rotor is fixed in rotary head, rotary head is connected with torque sensor by bull stick, torque sensor is arranged on the support of elevating mechanism, and torque sensor and elevating mechanism are controlled by control gear.Using method comprises: torque sensor rotarily drives paddle type rotor and rotates, paddle type rotor rotates the shear stress being subject to granule fluid in granule fluid, torque sensor by the change in torque that senses by electrical signal transfer to control gear, the viscosity of granule fluid can be calculated by the moment of torsion recorded.The invention has the advantages that can the viscosity number of various granule fluid under Measurement accuracy normal temperature, and precision is high, reproducible, and measuring speed is fast, and structure is simple, and cost is low, long service life, and production efficiency is high.
Description
Technical field:
The invention belongs to detection technique field, particularly a kind of instrument and measuring method measuring granule fluid viscosity.
Background technology:
Natural material can be divided into solid, liquid, gas and plasma four state (or four phases).Wherein, liquefied gas and plasma are called as fluid, this is because they just can be out of shape under the condition not adding any external force.When containing a large amount of fine solid particles in fluid, and flowing velocity enough large time, the flowing of solid particle is similar to fluid and solid particle can be regarded as pseudo-fluid (or quasi-fluid), processes together with plasma with liquefied gas as the flow field problem of fluid.Thus, granule fluid system is the most general a kind of phenomenon in nature and industry, is virtually affecting existence and the living environment of the mankind.Along with the development of science and technology, the research for granule fluid also deepens continuously, and therefore about the sign of granule fluid, also starts the attention being subject to researcher.
At present, sign about granule fluid is little, and the reflection viscosity coefficient of characteristic of fluid and the sign of granule fluid viscosity are not had, viscosity is an important physical character and the technical indicator of granule fluid, and the many fields of its viscosity of Accurate Determining in industry and scientific research are significant.In addition, Gonna breakthrough is to the understanding of granule fluid bonding defluidization phenomenon, then for the sign of granule fluid coefficient of viscosity and the viscosimetric analysis of granule fluid most important, therefore find the instrument that measures granule fluid viscosity and computing method significant for the research of granule fluid viscosity.
Present Domestic has the instrument and equipment of multiple measurement viscosity, but majority is for measuring the viscosity of normal temperature or high-temp liquid, and the instrument and equipment about the viscosity measurement of granule fluid is then relatively less.Cylindrical rotor, based on cylindrical, put into granule fluid and is rotated by the rotor of domestic rotary viscometer main at present, and after rotating certain hour, the rotation of rotor can not be subject to the shear stress of granule fluid, therefore can not Measurement accuracy granule fluid viscosity.
Summary of the invention:
The object of the invention is to overcome the deficiencies in the prior art, improve for existing rotary viscometer, provide a kind of rotary viscosity with paddle type rotor to take into account the method measuring granule fluid viscosity with it.
The present invention solves by the following technical programs:
A kind of rotational viscosimeter with paddle type rotor, comprise torque sensor, support, elevating mechanism, bull stick, rotary head, sample chamber, paddle type rotor, testing table, signal wire, control gear, it is characterized in that, paddle type rotor is fixed in rotary head, rotary head is connected with torque sensor by bull stick, torque sensor is arranged on the support of elevating mechanism, and torque sensor and elevating mechanism are controlled by control gear; The rotational viscosimeter of above-mentioned band paddle type rotor, its torque sensor rotarily drives paddle type rotor and rotates, paddle type rotor rotates the shear stress being subject to granule fluid in granule fluid, torque sensor by the change in torque that senses by electrical signal transfer to control gear, read by control gear the viscosity that moment of torsion can calculate granule fluid, thus complete the measurement of granule fluid viscosity.
The rotational viscosimeter of above-mentioned band paddle type rotor, described paddle type rotor, blade face and surface level have certain angle theta, and angle theta controls between 5 °-10 °.
The rotational viscosimeter of above-mentioned band paddle type rotor, described paddle type rotor is coaxially connected with torque sensor with rotating shaft by rotary head, ensure that paddle type rotor is subject to the shear stress of granule fluid uniformly, the impact of boundary effect and end effect is dropped to minimum simultaneously.
The rotational viscosimeter of above-mentioned band paddle type rotor, described torque sensor is speed change torque sensor, controlled by control gear, the rotating speed that can measure as required is different, to measure the viscosity of granule fluid under the condition of especially constant rotational speed given in advance, in measuring process, also can need real-time adjusting rotary speed according to measurement simultaneously.
The rotational viscosimeter of above-mentioned band paddle type rotor, described torque sensor is changeable type torque sensor, selects according to practical measurement requirement the torque sensor changing different range.
The rotational viscosimeter of above-mentioned band paddle type rotor, described elevating mechanism is connected with control gear by signal wire, the degree of depth that paddle type rotor enters sample chamber accurately can be controlled by control gear, therefore can the viscosity of different depth place granule fluid in Accurate Determining sample chamber.
The rotational viscosimeter of above-mentioned band paddle type rotor, described control gear can the rotating speed of real-time online control torque sensor, also can show the moment that the rotating speed of torque sensor and paddle type rotor are subject in granule fluid in real time.
By the method for the viscosity meter viscosity of above-mentioned band paddle type rotor, step is as follows:
(1) predict the viscosity of granule fluid, the torque sensor selecting range to be applicable to, is fastened on torque sensor on support, and is connected with control gear with signal wire;
(2) paddle type rotor is connected with rotary head, rotary head is connected with torque sensor by bull stick;
(3) start elevating mechanism, being declined by paddle type rotor enters sample chamber, selects the distance bottom paddle type Rotor terminal test coupon room according to practical measurement requirement;
(4) add in sample chamber by surveyed granule fluid, the volume of granule fluid is no more than 3/4ths of sample chamber;
(5) torque sensor is opened, rotating speed is set, torque sensor drives paddle type rotor to rotate in granule fluid by bull stick and rotary head, is read the moment of torsion measured, then draw corresponding viscosity number according to the computing formula (I) of moment of torsion and viscosity by control gear
In formula, η represents kinetic viscosity, Pas; T represents surveyed powder moment of torsion, Nm; D represents the length of paddle type rotor, m; Nr represents the rotating speed of twice, r/s.
Advantage of the present invention: the various advantages with rotational viscosimeter, the viscosity number of various granule fluid under can accurately measuring normal temperature, precision is high, reproducible, and measuring speed is fast, and structure is simple, and cost is low, long service life, and production efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the rotational viscosimeter of band paddle type rotor; Note: in figure, 1-torque sensor, 2-support, 3-elevating mechanism, 4-bull stick, 5-rotary head, 6-sample chamber, 7-paddle type rotor, 8-testing table, 9-signal wire, 10-control gear.
Fig. 2 (a) is the front elevation of paddle type rotor;
Fig. 2 (b) is the vertical view of paddle type rotor;
Embodiment
The invention provides a kind of rotational viscosimeter with paddle type rotor, below in conjunction with accompanying drawing and instantiation, the present invention is described in further details.
As shown in Figure 1, a kind of rotational viscosimeter with paddle type rotor comprises paddle type rotor 7, paddle type rotor 7 is connected with bull stick 4 by rotary head 5, bull stick 4 is directly connected with torque sensor 1, torque sensor 1 is fastened on support 2, support 2 is directly fixed on elevating mechanism 3, and control gear 10 passes through signal wire 9 by signal transmission to elevating mechanism 3 and torque sensor 1, and sample chamber 6 is placed on testing table 8.
As shown in Fig. 2 (a), the blade face of paddle type rotor 7 and the angle of surface level control, between 5 °-10 °, to ensure that the uniform force of paddle type rotor in granule fluid.
As shown in Fig. 2 (b), paddle type rotor 7 is connected with rotary head 5 by middle screw.
As follows with the viscosity test of rotational viscosimeter to sample of described band paddle type rotor:
Embodiment 1
Measure the viscosity number of iron powder:
(1) predict the viscosity of iron powder, select range to be 0-0.5Nm torque sensor, torque sensor is fastened on support, is connected with control gear by signal wire;
(2) be connected with rotary head by paddle type rotor, rotary head is connected with torque sensor by bull stick;
(3) start elevating mechanism, being declined by paddle type rotor enters sample chamber, 1mm bottom paddle type Rotor terminal test coupon room;
(4) add in sample chamber by surveyed iron powder, iron powder ground level in sample chamber is 40mm;
(5) torque sensor is opened, arranging rotating speed is 180r/min, torque sensor drives paddle type rotor to rotate in iron powder by bull stick and rotary head, and it is 0.085Nm that control gear shows the moment of torsion recorded, and the computing formula (I) of torque value being brought into viscosity draws corresponding viscosity number
(6)
π=3.14 in formula, D=0.04m, Nr=6r/s, T=0.085Nm bring viscosities il=74.4Pas that above formula obtains iron powder into.
Claims (5)
1. a method for the rotary viscosity measuring viscosity with paddle type rotor, it is characterized in that, step is as follows:
(1) predict the viscosity of granule fluid, the torque sensor selecting range to be applicable to, is fastened on torque sensor on support, is connected by signal wire with control gear;
(2) paddle type rotor is connected with rotary head, rotary head is connected with torque sensor by bull stick;
(3) start elevating mechanism, being declined by paddle type rotor enters sample chamber, selects the distance bottom paddle type Rotor terminal test coupon room according to practical measurement requirement;
(4) add in sample chamber by surveyed granule fluid, the volume of granule fluid is no more than 3/4ths of sample chamber;
(5) torque sensor is opened, arrange rotating speed, torque sensor drives paddle type rotor to rotate in granule fluid by bull stick and rotary head, is read the moment of torsion measured by control gear, corresponding viscosity number is drawn again according to the computing formula (I) of moment of torsion and viscosity
In formula, η represents kinetic viscosity, Pas; T represents the moment of torsion of surveyed granule fluid, Nm; D represents the length of paddle type rotor, m; Nr represents the rotating speed of twice, r/s.
2. the rotational viscosimeter of the band paddle type rotor being with the method for the rotary viscosity measuring viscosity of paddle type rotor to use as claimed in claim 1, it is characterized in that, comprise torque sensor (1), support (2), elevating mechanism (3), bull stick (4), rotary head (5), sample chamber (6), paddle type rotor (7), testing table (8), signal wire (9), control gear (10), paddle type rotor is fixed in rotary head, rotary head is connected with torque sensor by bull stick, torque sensor is arranged on the support of elevating mechanism, torque sensor is connected with control gear by signal wire with elevating mechanism, controlled by control gear, testing table is immediately below support, sample chamber is placed on testing table.
3. the rotational viscosimeter of band paddle type rotor according to claim 2, is characterized in that: described paddle type rotor, and the angle of paddle type rotor blade face and surface level is that θ, θ control between 5 °-10 °.
4. the rotational viscosimeter of band paddle type rotor according to claim 2, is characterized in that: paddle type rotor is coaxially connected with torque sensor with bull stick by rotary head.
5. the rotational viscosimeter of band paddle type rotor according to claim 2, is characterized in that: described torque sensor is the adjustable changeable type torque sensor of rotating speed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NL2020230B1 (en) * | 2018-01-03 | 2019-07-10 | Univ Delft Tech | Portable viscometer and method of measuring a medium's viscosity |
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| CN105181526B (en) * | 2015-07-17 | 2017-08-25 | 江苏恒神股份有限公司 | The detection method of viscosity in sizing agent production process |
| CN108982296B (en) * | 2018-04-27 | 2020-10-09 | 上海建工集团股份有限公司 | Device and method for measuring pumpability of low-flow concrete |
| CN109459344B (en) * | 2018-11-07 | 2021-06-18 | 湖南工程学院 | Coal sample viscosity detection and rectification device |
| CN109269941B (en) * | 2018-11-28 | 2023-11-17 | 广东省计量科学研究院（华南国家计量测试中心） | Glass adhesive on-line measuring system and measuring method |
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| CN2746385Y (en) * | 2004-03-24 | 2005-12-14 | 陈文� | Main mechanism of viscosity, concentration detector |
| JP2005292072A (en) * | 2004-04-05 | 2005-10-20 | Ricoh Co Ltd | Flowability evaluation apparatus for powder, toner for electrostatic charge image development and its manufacturing method, development method therefor, toner cartridge, and process cartridge |
| CN101063652B (en) * | 2006-04-29 | 2010-09-29 | 赵文成 | Mass-flow instrument |
| US8024962B2 (en) * | 2008-07-28 | 2011-09-27 | Halliburton Energy Services Inc. | Flow-through apparatus for testing particle laden fluids and methods of making and using same |
| CN102519647B (en) * | 2011-12-15 | 2013-11-20 | 长安大学 | Device for testing flow resistance of temperature-sensitive particle type material |
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| NL2020230B1 (en) * | 2018-01-03 | 2019-07-10 | Univ Delft Tech | Portable viscometer and method of measuring a medium's viscosity |
| WO2019135677A1 (en) * | 2018-01-03 | 2019-07-11 | Technische Universiteit Delft | Portable viscometer and method of measuring a medium' s viscosity |
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