CN2206958Y - Induction rotary viscosimeter - Google Patents
Induction rotary viscosimeter Download PDFInfo
- Publication number
- CN2206958Y CN2206958Y CN 94206362 CN94206362U CN2206958Y CN 2206958 Y CN2206958 Y CN 2206958Y CN 94206362 CN94206362 CN 94206362 CN 94206362 U CN94206362 U CN 94206362U CN 2206958 Y CN2206958 Y CN 2206958Y
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- rotating shaft
- liquid
- liquid bath
- viscosity
- rotation
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Abstract
The utility model relates to an induction rotary viscosimeter, composed of a rotary driving part, a viscosity testing part and a control detecting part, wherein, the rotary driving part is identical with a common watt-hour meter, comprising a current coil, a voltage coil and a rotary disc; the viscosity testing part comprises a liquid flume and a liquid cutting component inversed into the liquid flume; the liquid cutting component is driven by the rotation shaft of the rotary driving part, and the liquid to be measured inside the liquid flume plays a braking action on rotation; when movement is balanced, the current of the current coil is in direct proportion to the cutting stress of the liquid, and the rotation frequency of the rotary disc is in direct proportion to shearing rate; thereby, the viscosity of the liquid is obtained. The utility model has the advantages of simple structure and favorable testing reproducibility. The utility model is especially suitable for the measure of the viscosity of blood.
Description
The utility model relates to a kind of viscosity meter, particularly a kind of viscosity meter that adopts induction type rotary process test blood viscosity.
Existing viscosity meter, particularly blood viscometer mainly contain capillary type and rotary two kinds, though it respectively has characteristics, but the inherent defect that is difficult to overcome is also respectively arranged, and the shortcoming of capillary viscosimeter is that difficulty is cleaned in its test back, so that influences the reappearance of test result; The shortcoming of rotary viscosimeter is a complex process, is difficult to guarantee the accuracy requirement of testing.
The measuring system of tradition rotary viscosimeter is driven by rotation usually and moment detection two parts are formed.They lay respectively at the both sides of two rotary bodies (concentric drums or bore a plate) of relative motion.Driving mechanism drives moving sidespin and turns and do the constant speed rotation during work, and its driving moment is delivered on quiet sidespin turns by being present in the detected medium of viscosity between two rotary bodies, and the moment measuring device that is installed in the there detects.
In above-mentioned traditional system architecture,, just require driving and measure portion to reach corresponding accuracy requirement simultaneously for reaching certain complete machine precision.From present technical merit, the realization of wide region high-accuracy speed regulating system is difficulty not very, but the measurement of moment is much more difficult by contrast, and therefore the precision of complete machine is affected the also inaccessible naturally requirement of the precision of test and reappearance.
The purpose of this utility model provides a kind of induction type rotational viscosimeter, and the requirement that its technology is simple, precision and reappearance can both satisfy viscosity test particularly can be satisfied every requirement of Hemorheology test blood viscosity.
The technical scheme of the utility model viscosity meter is different with traditional rotary viscosimeter, is about to traditional given rotating speed and the method for measuring moment changes given moment into and measures the scheme of rotating speed.Angle from system's realization, tachometric survey is much easier than torgue measurement, therefore the complete machine precision will depend primarily on the given precision of moment in new departure, and the driving of the dial plate of induction meter provides suitable successful experience to use for reference in this respect.
Known, induction meter comprises two fixed iron core coils and a movable disk, and when two coils, when promptly electric current and potential winding were by alternating current, induction produced electromagnetic force on rotating disk, thereby rotates moment M
pMake the dial rotation of watt-hour meter.Between two coils, be provided with a braking member (magnet), in order to when rotating disk rotates, to produce the moment opposite, i.e. braking moment M with the dial rotation direction
rAs braking moment M
rWith rotating torque M
pWhen balancing each other, i.e. M
r=M
pThe time, the rotating disk of watt-hour meter just keeps stable rotating speed constantly to rotate.According to this equilibrium condition, can draw the relation between the revolution of rotating disk (or rotating speed) and electric energy within a certain period of time.
Utilize above-mentioned principle of work, fluid to be measured as braking (damping) material, is replaced the brake magnet in the watt-hour meter, make rotating disk produce braking (damping) effect rotation, when reaching equilibrium-like, the rotating speed of rotating disk and institute's consuming electric power have promptly reflected the size of liquid viscosity.
The theory structure of induction type rotational viscosimeter is acting on two moments on the aluminium dish of rotation shown in Fig. 1,4, one is the rotating torque that electromagnet produces, and one is the braking moment that measured medium produces.Rotating torque is produced by two electromagnet, and it is 90 ° simple sinusoidal alternating current I that two magnet coils pass to phase differential respectively
1And I
2The time, the alternating flux that two coils produce is all passed the aluminium dish and produce corresponding induction current in dish, and these induction currents and alternating magnetic field interact and form driving moment.The average weight (inertia of aluminium dish makes it can only respond the average weight of driving moment) of remembering this moment is Mav, can get according to the electrotechnics principle:
Mav＝KI （1）
I=I wherein
1, K=K ' I
2, and K ' is a textural constant relevant with magnetic circuit.During detection if control I
2Invariable, then the K in the following formula is exactly a constant.Thereby just can given easily driving moment Mav by changing electric current I.
The moving rotating cylinder (see figure 4) of aluminium dribbling is rotated under the effect of Mav, because the viscous resistance of measured medium, rotating cylinder will be subjected to braking moment M
cEffect, its size be directly proportional with dielectric viscosity and rotating cylinder rotating speed, when stablizing, rotating torque Mav and braking moment M
cBalance, note rotating cylinder rotating speed is N, then has:
Mav＝M
c（2－1）
N＝1／T （2－2）
Wherein T is an aluminium dish rotation period, can utilize general tachometry method to measure.
According to fluid mechanics principle, the apparent viscosity M of measured medium
AppRotation period T and moment Mav in the time of can be by balance try to achieve, and be example with concentric cylinder viscosimeter (as Fig. 4), but its apparent viscosity tabular form are:
μ
app＝ (（Rc
2-R
b 2))/(8
2LR
c 2R
b 2) Mav·T
＝K
v·Mav·T （3）
K wherein
vBe an instrument constant relevant with the concentric drums geometry.
On principle, the Mav in (3) is a specified rate, and T is measured, therefore is suitable for the viscosity measurement under the given shearing stress condition.Because Mav directly is controlled by electric current I (formula 1), so also be easy under the control of computing machine, by adjusting Mav period T is stable at arbitrarily on the set-point, thereby realizes viscosity measurement under the given shear rate condition, and the latter more meets clinical requirement of experiment and convention.
The structure of the utility model induction type rotational viscosimeter comprises rotation driving, viscosity test, three parts of control detection;
Rotary driving part subpackage including rack, and be installed in wherein current coil, potential winding and rotatable parts; Current coil and potential winding produce mutually orthogonal alternating flux, so that driving moment to be provided; Described rotatable parts are one to be arranged on the aluminium disks between two coils, and the rotating shaft that is driven by this disk, and the lower end of this rotating shaft is assemblied on the jewel bearing at the bottom centre place that is located at aforementioned frame;
Viscosity test partly is installed in the upper rack that rotary driving part divides, and comprising: the liquid bath that an opening makes progress (or blood groove.Below be referred to as liquid bath) in order to be installed in fluid to be measured (or blood.Below be referred to as liquid); One be placed in this liquid bath coaxially and the certain interval of being separated by with it cut liquid parts (or cutting the blood parts), described liquid bath and cut one of liquid parts and be packed in the rotating shaft of described driver part, can be driven by rotating shaft and rotate, another part is installed on the described frame, and both can make relative rotary motion;
Control detection and circuit part comprise:
Periphery at described rotating disk has through hole, with the corresponding position of through hole on be equiped with the optocoupler velometer, the output speed signal;
One control detection device has two driver elements, difference drive current and potential winding, and one of two driver elements are adjustable for setting electric current, so that different driving moments to be provided; Also have a computing unit, thereby accept above-mentioned tach signal and driving current signal and calculate the signal of the viscosity of the output expression liquid of surveying
The utility model viscosity meter is compared with the rotational viscosimeter of existing other form, has following advantage:
1, simple in structure, cost is low.
2, detection head is easy to clean, and the test reappearance is good.
3, shop characteristic is good, and reappearance and measuring accuracy guarantee easily.
Describe specific embodiment of the utility model in detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model viscosity meter viscosity test schematic diagram
Fig. 2 is the structural representation of the utility model viscosity meter one embodiment
Fig. 3 is the another kind of liquid trough structure synoptic diagram of the utility model viscosity meter shown in Figure 2
Fig. 4 is another embodiment synoptic diagram of the utility model viscosity meter.
Fig. 5 is the control test macro synoptic diagram of the utility model viscosity meter.
The utility model induction type rotational viscosimeter as shown in Figure 2, is made up of rotation driving, viscosity test, three parts of control detection.
The principle of work that rotary driving part divides is identical with general watt-hour meter commonly used with structure, comprises frame 1, and is installed in wherein current coil 2, potential winding 3 and rotatable parts; The iron core of two coils can be formed by stacking by siliconized plate; Described rotatable parts are one to be arranged on the aluminium disks 4 between two coils, and the rotating shaft 5 that drives by this disk 4, the lower end of this rotating shaft 5 is assemblied on the jewel bearing 6 at the bottom centre place that is located at aforementioned frame 1, and its epimere has a support lug 7, and its upper end is one top 8;
The viscosity test part as shown in the figure, is installed in frame 1 top that rotary driving part divides, and comprising:
One holder covers 9, is fixed on the top of frame 1, and the epimere of the rotating shaft 5 of such rotation drive part protrudes upward by the center pit of this holder lid 9;
One sits the liquid bath 10 that is located on the described holder lid 9, has the ring groove 11 that opening makes progress; All pendular rings 13 are and are inverted thin tubular, and the tube bottom branch is placed on the support lug 7 of rotating shaft 5, can rotate with the rotation of rotating shaft 5, and its cylindrical portions may is inserted in the ring groove 11 of liquid bath 10, and keeps certain interval with it;
Described liquid bath 10 and cut pendular ring 13 all concentric locking collar be located in the rotating shaft 5; At liquid bath 10 and the certain heart cover 14 of the outside enclosure of cutting pendular ring 13, a pressure mother 15, top 8 of the female 15 times described rotating shafts 5 of rotatably bearing down on one of this pressure are equipped with in its top, center;
The further improvement of the liquid trough structure of the utility model viscosity meter, as shown in Figure 3, sheathed again liquid bath cover 12 on the inwall of liquid bath 10, purpose is that the intensification of the liquid bath degree of depth and the line of rabbet joint are reduced, this texture ratio single ring groove shown in Figure 1 is easier to processing and assembling, and it is convenient to clean, thereby reaches higher signal to noise ratio (S/N ratio) and uniform shear rate.
The another kind of version of the viscosity test part of the utility model viscosity meter, as shown in Figure 4, liquid bath 20 is made the drum that opening makes progress, and is installed in the top of rotating shaft 25 at the bottom of the cylinder, be installed with a circular aluminium dish 24 in the rotating shaft 25, so this cylindric liquid bath 20 can be in the moving rotation down of aluminium dribbling.In these cylindric liquid bath 20 inside, coaxial but all liquid inner cylinders 23 are not set in contact, this inner cylinder 23 tops lifting is fixed on the frame on viscosity meter top.Form an annulus 21 between cylindric liquid bath 20 and inner cylinder 23, fluid to be measured promptly leaves in this space.
Control detection and circuit part, shown in Fig. 2,5, periphery at described rotating disk 4 has one or more through holes 16, with through hole 16 corresponding positions on the installing one optocoupler velometer 17, light transmission through hole 16 shines on the light activated element, can produce photosignal, when rotating disk 4 rotates, can measure the rotation period T(1/N of expression rotating disk 4) photoelectric pulse signal.
The detection of the swing circle of rotating disk 4 also can adopt reflective optocoupler or Hall device or other existing methods of surveying rotating speed to carry out.
Control and detection system, as shown in Figure 5, comprise: a control detection device 27, inside has a computing unit 28 and current drives unit 29, voltage drive unit 30, two driver elements 29,30 output current are respectively given current coil 2 and potential winding 3, have at least one to be that the setting electric current is adjustable among two drive coils 29,30, so that required moment to be provided; The signal of expression rotation period T is surveyed in 17 outputs of optocoupler velometer, delivers to described control detection device 27; Described computing unit 28 is accepted above-mentioned expression drive current I
3, I
2With the signal of rotation period T,, be converted to viscosity data and export through calculating.
The utility model makes the given of described driving moment Mav and rotation period T all easily keep enough precision with measuring owing to adopt with above-mentioned new technical scheme and corresponding new structure.Influencing the complete machine accuracy factors is the frictional resistance of carrying aluminium dish and rotating cylinder rotating shaft.The utility model viscosity meter adopts the supporting of instrument jewel bearing, at shear rate greater than 5～10(S
-1) and less than 200(S
-1) scope in can reach and be better than 3% full scale precision, thereby can satisfy the requirement of Hemorheology viscosity measurement clinically well.
Claims (4)
1, a kind of induction type rotational viscosimeter comprises rotation driving, viscosity test, three parts of control detection;
The rotary driving part branch comprises: frame, and be installed in wherein current coil, potential winding and rotatable parts; Described rotatable parts are one to be arranged on the aluminium disks between two coils, and the rotating shaft that is driven by this disk, and the lower end of this rotating shaft is assemblied on the bearing at the bottom centre place that is located at aforementioned frame,
Viscosity test partly is installed in the upper rack that rotary driving part divides, and comprising:
The liquid bath that one opening makes progress, in order to be installed in fluid to be measured, one be placed in this liquid bath coaxially and the certain interval of being separated by with it cut the liquid parts, described liquid bath and cut one of liquid parts and be packed in the rotating shaft of described driver part, can be driven by rotating shaft and rotate, another part is installed on the described frame, and both can make relative rotary motion;
Control detection and circuit part comprise:
Periphery at described rotating disk has through hole, with the corresponding position of through hole on be equiped with the optocoupler velometer, the output speed signal;
Have the two-way driver element, one of them is that drive current is adjustable at least, so that different driving moments to be provided.
2, viscosity meter as claimed in claim 1 is characterized in that:
The upper end of the rotating shaft of described drive part is one top as rotating fulcrum, and this rotating shaft epimere has a support lug, with supporting and drive described part of detecting cut the rotation of liquid parts; One holder lid is fixed on frame top, and the epimere of the rotating shaft of such rotation drive part protrudes upward from the center of this holder lid;
One seat is located at the liquid bath that described holder covers, and has the ring groove that opening makes progress;
One be inverted thin tubular cut pendular ring as part of detecting cut the liquid parts, this tube bottom branch of cutting pendular ring is upside down on the support lug of rotating shaft, can rotate with the rotation of rotating shaft, its cylindrical portions may is inserted in the ring groove of blood groove, and keeps certain interval with it;
Described liquid bath and cut pendular ring all concentric locking collar be located in the rotating shaft; At liquid bath and the certain heart cover of the outside enclosure of cutting pendular ring, its top, center has one to press mother, female the top of described rotating shaft of rotatably bearing down on one down of this pressure.
3, viscosity meter as claimed in claim 2 is characterized in that being arranged with a liquid bath cover on described liquid bath inwall.
4, viscosity meter as claimed in claim 1, it is characterized in that described liquid bath is the cylindric cell body that opening makes progress, its cell body bottom is installed in the rotating shaft top of drive part, and the described liquid parts of cutting are a cylindric inner cylinder, and this cylinder top is installed on the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94206362 CN2206958Y (en) | 1994-01-17 | 1994-03-22 | Induction rotary viscosimeter |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100165.2 | 1994-01-17 | ||
| CN94100165 | 1994-01-17 | ||
| CN 94206362 CN2206958Y (en) | 1994-01-17 | 1994-03-22 | Induction rotary viscosimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2206958Y true CN2206958Y (en) | 1995-09-06 |
Family
ID=34065463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94206362 Expired - Fee Related CN2206958Y (en) | 1994-01-17 | 1994-03-22 | Induction rotary viscosimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2206958Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417935C (en) * | 2001-07-30 | 2008-09-10 | 西北工业大学 | Method and equipment for observing frozen organization of metal material and researching its rheologic behavour |
| CN102658271A (en) * | 2012-05-18 | 2012-09-12 | 济南美医林电子仪器有限公司 | Automatic cleaning method and device for measurement mechanism of suspension blood rheometer |
| CN102830041A (en) * | 2012-09-04 | 2012-12-19 | 济南美医林电子仪器有限公司 | Stepping scanning torque measuring device in magnetic-levitation bearing support structure |
| CN103822853A (en) * | 2014-03-20 | 2014-05-28 | 北京中勤世帝生物技术有限公司 | Rotary viscosity measurement device |
| CN102112860B (en) * | 2008-08-01 | 2014-11-05 | 马尔文仪器有限公司 | Expert-system-based rheology |
| CN104897524A (en) * | 2015-06-10 | 2015-09-09 | 太原理工大学 | Device and method for testing rheologic property of coal mine filling slurry |
| CN107340206A (en) * | 2017-07-10 | 2017-11-10 | 天津海迈医用科技有限公司 | Device for lectin from hemolymph detection |
| CN107643237A (en) * | 2017-10-13 | 2018-01-30 | 奇思智控（天津）商贸有限公司 | Viscosimeter |
| CN112782043A (en) * | 2020-12-29 | 2021-05-11 | 华南理工大学 | Rotary vane type viscosity sensor |
| CN107643237B (en) * | 2017-10-13 | 2024-04-30 | 南京谱蒂亮森信息科技有限公司 | Viscometer (viscosimeter) |
-
1994
- 1994-03-22 CN CN 94206362 patent/CN2206958Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417935C (en) * | 2001-07-30 | 2008-09-10 | 西北工业大学 | Method and equipment for observing frozen organization of metal material and researching its rheologic behavour |
| CN102112860B (en) * | 2008-08-01 | 2014-11-05 | 马尔文仪器有限公司 | Expert-system-based rheology |
| CN102658271A (en) * | 2012-05-18 | 2012-09-12 | 济南美医林电子仪器有限公司 | Automatic cleaning method and device for measurement mechanism of suspension blood rheometer |
| CN102658271B (en) * | 2012-05-18 | 2013-12-25 | 山东美医林电子仪器有限公司 | Automatic cleaning method and device for measurement mechanism of suspension blood rheometer |
| CN102830041A (en) * | 2012-09-04 | 2012-12-19 | 济南美医林电子仪器有限公司 | Stepping scanning torque measuring device in magnetic-levitation bearing support structure |
| CN103822853A (en) * | 2014-03-20 | 2014-05-28 | 北京中勤世帝生物技术有限公司 | Rotary viscosity measurement device |
| CN104897524A (en) * | 2015-06-10 | 2015-09-09 | 太原理工大学 | Device and method for testing rheologic property of coal mine filling slurry |
| CN104897524B (en) * | 2015-06-10 | 2017-05-17 | 太原理工大学 | Device and method for testing rheologic property of coal mine filling slurry |
| CN107340206A (en) * | 2017-07-10 | 2017-11-10 | 天津海迈医用科技有限公司 | Device for lectin from hemolymph detection |
| CN107643237A (en) * | 2017-10-13 | 2018-01-30 | 奇思智控（天津）商贸有限公司 | Viscosimeter |
| CN107643237B (en) * | 2017-10-13 | 2024-04-30 | 南京谱蒂亮森信息科技有限公司 | Viscometer (viscosimeter) |
| CN112782043A (en) * | 2020-12-29 | 2021-05-11 | 华南理工大学 | Rotary vane type viscosity sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |