CN202471552U - Two-coil type device for testing rheological property of magnetorheogical fluid - Google Patents
Two-coil type device for testing rheological property of magnetorheogical fluid Download PDFInfo
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- CN202471552U CN202471552U CN2012200233582U CN201220023358U CN202471552U CN 202471552 U CN202471552 U CN 202471552U CN 2012200233582 U CN2012200233582 U CN 2012200233582U CN 201220023358 U CN201220023358 U CN 201220023358U CN 202471552 U CN202471552 U CN 202471552U
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Abstract
The utility model discloses a two-coil type device for testing the rheological property of magnetorheogical fluid, and belongs to the technical field of physical test devices. The two-coil type device comprises a motor, a stander, an upper end cover, a lower end cover, a rotating shaft, a fixed shaft, a hall sensor, a temperature sensor, a movable disk, a fixed disk, a clearance adjustment device, a first coil and a second coil, wherein the motor is fixed on the stander and connected with the rotating shaft through an input gear; the clearance adjustment device is respectively connected with the upper end cover and the rotating shaft; the rotating shaft is connected with the movable disk on the lower part; the fixed disk is connected with the fixed shaft; the movable disk and the fixed disk form a test cavity; the hall sensor and the temperature sensor are arranged on the lower part of the fixed disk; the fixed shaft penetrates through the lower end cover; a torque sensor is arranged at the lower end of the fixed shaft; the lower end cover is fixed on the stander; the first coil is connected with the upper end cover; and the second coil is connected with the lower end cover. The two-coil type device has a two-coil structure, is relatively high in measurement precision, can adjust the clearance of the test cavity and is favorable for researching the influence of the clearance on the shearing strength.
Description
Technical field
The utility model relates to a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation, belongs to physical testing device technique field.
Background technology
Magnetic flow liquid is the controlled SMART FLUID of a kind of rheological characteristics, under zero magnetic field, shows as the characteristic of low viscous Newtonian fluid; Magnetic-particle in adding the action of a magnetic field low suspension liquid is polarized into the chain structure that is parallel to the magnetic field line direction; This chain structure sharply increases the viscosity of magnetic flow liquid; Shear yield stress also is approximated to linear increase rapidly, demonstrates the character of similar solid.After magnetic field disappears, show as the character of Newtonian fluid again rapidly, the variation of the rheological characteristics of magnetic flow liquid can be accomplished in the time of Millisecond.Because magnetic current and liquid flow variation characteristic is controlled easily and effect is obvious, makes it become popular research material.The test of magnetic current and liquid flow variation characteristic is one of emphasis of research, and magnetic current and liquid flow variation characteristic is mainly cashed and is shear yield stress and viscosity.
At present; Test mode and test macro to magnetic flow liquid also are in the property the inquired into development stage; Test to magnetic current and liquid flow variation characteristic mainly contains two kinds of patterns: pipe modes and shear mode, shear mode are divided into rotary two kinds of the rotary and parallel video disc of concentric drums again.Pipe modes can obtain higher shear rate; But under the high-intensity magnetic field effect, can in pipeline, be assembled and mother liquor flows out along pipeline by the ferromagnetic particle that polarized; Cause the concentration of magnetic flow liquid in the pipeline to increase; Cause test result higher, also can produce the wall slippage effect simultaneously, cause test result inaccurate; The rotary test of concentric drums can produce the sectorial magnetic field because of drum diameter inside and outside it is unequal, and just there is defective in itself on test philosophy; For parallel video disc wheel measuring mode, when the video disc rotational speed was too high, the ferromagnetic particle in the magnetic flow liquid can be assembled to disk border under action of centrifugal force, causes test result inaccurate.
Germany had developed the instrument that is specifically designed to the magnetic current and liquid flow variation characteristic test in 1998; Its structure is to process a magnetic conductive loop and cavity volume by ferrimagnet, and a rotating circular disk is set in cavity volume, in cavity volume, is full of magnetic flow liquid; After the energising, the magnetic line of force vertically passes disk and magnetic flow liquid; Rotating circular disk is provided with turning axle, on the surface of turning axle foil gauge is housed, and can calculate the size of moment of torsion through the distortion of test turning axle.Through analyze finding: the load that test plate bears in magnetic field is the exponential function of size, and the ratio that adds radius and the thickness of big disk can improve the resolution of system.But because rotating circular disk places cavity volume, the size of cavity volume is inevitable to be increased along with the increase of disk size, and the increase of physical dimension can cause difficulty of making and the stability of installing operation; On the other hand, the torsion-testing position of this equipment can only be positioned on the rotation axis, owing to receive the influence of uneven magnetic field force and bearing friction moment, has limited measuring accuracy; This equipment can't be regulated the cavity volume gap in addition, makes to measure inconvenience.
In addition, in the existing testing apparatus of the instrument that comprises the development of aforementioned Germany, all adopt unicoil that magnetic field is provided, uniform magnetic field can not be provided, cause test result inaccurate.
Summary of the invention
To the problem that above-mentioned prior art exists, the utility model provides a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation, can improve measuring accuracy effectively, can carry out gap adjustment simultaneously, is convenient to measure.
To achieve these goals, the technical scheme of the utility model employing is: a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation comprises motor, frame, upper end cover, bottom end cover, rotation axis, stationary shaft, Hall element, temperature sensor, moving coil and stationary disk; Motor is fixed on the frame, and motor is connected with rotation axis through the input gear, also comprises slack adjuster, first coil and second coil; Slack adjuster is connected with rotation axis with upper end cover respectively, and rotation axis is connected with the moving coil of bottom, and stationary disk links to each other with stationary shaft; Moving coil and stationary disk constitute test chamber, and the stationary disk bottom is provided with Hall element and temperature sensor, and stationary shaft passes bottom end cover; The lower end of stationary shaft is provided with torque sensor; Bottom end cover is fixed on the frame, and first coil is connected with upper end cover, and second coil is connected with bottom end cover; The number of turn of described first coil and second coil is identical with radius; First coil and second coil laterally arrange, and the distance between first coil and second coil equals the radius of coil, and test chamber equates apart from the distance of first coil and second coil.
Preferably; Slack adjuster comprises cover, spiral sleeve, adjustment disk, scale mark post and tuning drive gear in preloading spring, the spiral; Cover is connected with rotation axis in the spiral, and spiral sleeve is connected with the interior external threading of spiral, and preloading spring is arranged between interior cover of spiral and the spiral sleeve; The scale mark post is arranged on spiral sleeve top, and adjustment disk and tuning drive gear are arranged on the top of cover in the spiral.
Preferably, test chamber is to be the annular test chamber that the moving coil of U type and stationary disk that section is the W type constitute by section.
Preferably, the upper and lower surfaces of test chamber is a uneven surface.
Preferably, stationary disk is provided with at a distance from disk.
Preferably, be respectively equipped with cooling fluid inlet and heat radiation chamber on the bottom end cover, the rotation axis center is provided with the magnetic flow liquid filling orifice, and stationary disk is provided with the magnetic flow liquid flow export, and the magnetic flow liquid flow export is provided with the outflow valve gear.
Preferably, flow out valve gear and comprise sealing ring, spring, conduit, pilot sleeve and valve hand, sealing ring is arranged on the conduit upper end, and pilot sleeve is connected with conduit is nested, and spring is arranged between pilot sleeve and the conduit, and the valve hand is arranged on the conduit lower end.
Preferably, the lateral surface of the medial surface of moving coil and stationary disk is provided with O-ring seal.
The beneficial effect of the utility model is: the utility model adopts two coil configuration; Can guarantee vertically to pass the intensity and the homogeneity in the magnetic field of test chamber; Compare with existing single coil structure, the intensity and the homogeneity in magnetic field all have greatly improved, thereby have improved the precision of test result; Slack adjuster can be regulated the gap of test chamber, can study the influence of the size in gap to shearing force easily, is convenient to measure, and can adapt to the requirement of different types of magnetic flow liquid to the gap simultaneously; Separated disk around the test chamber can be avoided the influence in other magnetic fields in the test environment, has guaranteed the accuracy of measurement result.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the diagrammatic cross-section of the utility model except that support and the main part the drive disk assembly;
Fig. 3 is the partial enlarged drawing at A place among the utility model Fig. 2.
Among the figure: 1, motor, 2, rotation axis, 3, adjustment disk, 4, cover in the spiral, 5, spiral sleeve, 6, upper end cover; 7, first coil, 8, temperature sensor, 9, bottom end cover, 10, magnetism-isolating loop, 11, second coil, 12, the heat radiation chamber; 13, cooling fluid inlet, 14, stationary shaft, 15, the magnetic flow liquid flow export, 16, stationary disk, 17, Hall element, 18, moving coil; 19, O-ring seal, 20, test chamber, 21, at a distance from disk, 22, preloading spring, 23, the scale mark post, 24, tuning drive gear; 25, magnetic flow liquid magnetic flow liquid filling orifice, 26, torque sensor, 27, the input gear, 28, frame, 29, sealing ring; 30, spring, 31, conduit, 32, pilot sleeve, 33, the valve hand, 34, slack adjuster.
Embodiment
To combine accompanying drawing that the utility model is described further below.
Like Fig. 1, Fig. 2 and shown in Figure 3; A kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation; Comprise motor 1, frame 28, upper end cover 6, bottom end cover 9, rotation axis 2, stationary shaft 14, Hall element 17, temperature sensor 8, magnetism-isolating loop 10, moving coil 18 and stationary disk 16; Motor 1 is fixed on the frame 28, and motor 1 is connected with rotation axis 2 through input gear 27; This magnetic current and liquid flow variation characteristic proving installation also comprises slack adjuster 34, first coil 7 and second coil 11, and slack adjuster 34 is connected with rotation axis 2 with upper end cover 6 respectively, and magnetism-isolating loop 10 is arranged on first coil 7 and second coil, 11 inboards; Rotation axis 2 is connected with the moving coil 18 of bottom; Stationary disk 16 links to each other with stationary shaft 14, and moving coil 18 constitutes test chamber 20 with stationary disk 16, and stationary disk 16 bottoms are provided with Hall element 17 and temperature sensor 8; Stationary shaft 14 passes bottom end cover 9; The lower end of stationary shaft 14 is provided with torque sensor 26, and bottom end cover 9 is fixed on the frame 28 and (does not illustrate among the figure), and first coil 7 is connected with upper end cover 6; Second coil 11 is connected with bottom end cover 9; The number of turn of described first coil 7 and second coil 11 is identical with radius, and first coil 7 and second coil 11 laterally arrange, the distance between first coil 7 and second coil 11 equal coil radius (among Fig. 2 along about the center line symmetry two coils are coils; Be to have only first coil 7 and second coil two coils about in the of 11 among Fig. 2), test chamber 20 is equal apart from the distance of first coils 7 and second coil 11.
The form of cover and the mutual clamping of overcoat in slack adjuster 34 can adopt; Also can employing as shown in Figure 2 by overlap 4 in preloading spring 22, the spiral, spiral sleeve 5, adjustment disk 3, scale mark post 23 and tuning drive gear 24 form; Cover 4 is connected with rotation axis 2 in the spiral; Spiral sleeve 5 is threaded with the interior cover 4 of spiral, and preloading spring 22 is arranged between interior cover 4 of spiral and the spiral sleeve 5, and scale mark post 23 is arranged on spiral sleeve 5 tops; Adjustment disk 3 is arranged on tuning drive gear 24 and overlaps 4 top in the spiral; The utility model preferably adopts a kind of mode with scale mark post 23 in back, because adopt this mode can make the gap of regulating test chamber 20 more accurate, and the size that the while user regulates the gap more easily.
Test chamber 20 can adopt moving coil 18 and stationary disk 16 to constitute the disc test chamber; The moving coil 18 that also can employing as shown in Figure 2 be the U type by section and section are the annular test chamber that the stationary disk 16 of W type constitutes; The annular test chamber that the stationary disk 16 that the utility model preferably adopts the moving coil 18 that is the U type by section and section to be the W type constitutes; Because the suspended particle when the annular test chamber that is made up of this shape can be avoided high speed rotating in the magnetic flow liquid gathers to the edge, can reduce the magnetic flow liquid consumption simultaneously under the effect of inertial force.
The upper and lower surfaces of test chamber 20 can be shiny surface, also can be uneven surface, transmits better to guarantee precision of test result for making shearing force, and the utility model preferably adopts uneven surface.
As another improvement of the utility model, stationary disk 16 is provided with at a distance from disk 21, can reduce extraneous magnetic interference effectively because adopt at a distance from disk 21.
Flow out valve gear and can adopt the lid of screwing, also can as shown in Figure 3ly comprise sealing ring 29, spring 30, conduit 31, pilot sleeve 32 and valve hand 33, sealing ring 29 is arranged on conduit 31 upper ends; Pilot sleeve 32 and 31 nested connections of conduit; Spring 30 is arranged between pilot sleeve 32 and the conduit 31, and valve hand 33 is arranged on conduit 31 lower ends, a kind of mode in preferred back; Adopt the flow of the outflow of the not only more convenient control magnetic flow liquid of this mode, simultaneously better tightness.
For guaranteeing that further magnetic flow liquid does not overflow stationary disk 16, be provided with O-ring seal 19 at the medial surface of moving coil 18 and the lateral surface of stationary disk 16.
The course of work: in test chamber 20, inject the magnetic flow liquid of being tested through magnetic flow liquid filling orifice 25; First coil 7 and second coil 11 are switched on simultaneously and are produced magnetic field then; The rheological characteristics of magnetic flow liquid changes under the action of a magnetic field, motor 1 energising simultaneously, and its torque passes to rotation axis 2 through input gear 28; Rotation axis 2 drives moving coil 18 rotations; Shear magnetic flow liquid, the shear stress that magnetic flow liquid produces passes to torque sensor 26 through stationary disk 16 and stationary shaft 14, and strain bridge produces the corresponding electric quantity change amount of distortion output in the torque sensor 26; The electric quantity change amount is amplified after data collecting card is input to host computer with signal through amplifier, after corresponding software processes, just can obtain corresponding yield value of stress; Simultaneously, Hall element 17 detects the magnetic field intensity of passing test chamber 20, and the voltage signal of Hall element 17 outputs is sent to host computer through data collecting card after transmitter amplifies, and handles just obtaining the magnetic induction density value through host computer; Temperature sensor 8 detects the working temperature of magnetic flow liquid; And by the temperature controller display temperature; The rotating speed of moving coil 18 is measured through the scrambler on the motor 1, just can draw the shear yield stress of tested magnetic flow liquid through Theoretical Calculation after drawing above-mentioned data, thereby assess its rheological characteristics.
Claims (8)
1. twin coil formula magnetic current and liquid flow variation characteristic proving installation; Comprise motor (1), frame (28), upper end cover (6), bottom end cover (9), rotation axis (2), stationary shaft (14), Hall element (17), temperature sensor (8), magnetism-isolating loop (10), moving coil (18) and stationary disk (16); Motor (1) is fixed on the frame (28), and motor (1) is connected with rotation axis (2) through input gear (27), it is characterized in that; Also comprise slack adjuster (34), first coil (7) and second coil (11); Magnetism-isolating loop (10) is arranged on first coil (7) and second coil (11) inboard, and slack adjuster (34) is connected with rotation axis (2) with upper end cover (6) respectively, and rotation axis (2) is connected with the moving coil (18) of bottom; Stationary disk (16) links to each other with stationary shaft (14); Moving coil (18) and stationary disk (16) constitute test chamber (20), and stationary disk (16) bottom is provided with Hall element (17) and temperature sensor (8), and stationary shaft (14) passes bottom end cover (9); The lower end of stationary shaft (14) is provided with torque sensor (26); Bottom end cover (9) is fixed on the frame (28), and first coil (7) is connected with upper end cover (6), and second coil (11) is connected with bottom end cover (9); Described first coil (7) is identical with radius with the number of turn of second coil (11); First coil (7) laterally arranges with second coil (11), and the distance between first coil (7) and second coil (11) equals the radius of coil, and test chamber (20) equates apart from the distance of first coil (7) and second coil (11).
2. a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation according to claim 1; It is characterized in that; Described slack adjuster comprises cover (4), spiral sleeve (5), adjustment disk (3), scale mark post (23) and tuning drive gear (24) in preloading spring (22), the spiral; Cover (4) is connected with rotation axis (2) in the spiral, and spiral sleeve (5) is threaded with the interior cover of spiral (4), and preloading spring (22) is arranged between interior cover of spiral (4) and the spiral sleeve (5); Scale mark post (23) is arranged on spiral sleeve (5) top, and adjustment disk (3) and tuning drive gear (24) are arranged on the top of cover (4) in the spiral.
3. a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation according to claim 1 is characterized in that, described test chamber (20) is the annular test chamber that is the moving coil (18) of U type and stationary disk (16) formation that section is the W type by section.
4. according to claim 1 or 3 described a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installations, it is characterized in that the upper and lower surfaces of described test chamber (20) is a uneven surface.
5. a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation according to claim 1 is characterized in that, described stationary disk (16) is provided with at a distance from disk (21).
6. a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation according to claim 1; It is characterized in that; Be respectively equipped with cooling fluid inlet (13) and heat radiation chamber (12) on the described bottom end cover (9); Rotation axis (2) center is provided with magnetic flow liquid filling orifice (25), and stationary disk (16) is provided with magnetic flow liquid flow export (15), and magnetic flow liquid flow export (15) is provided with the outflow valve gear.
7. a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation according to claim 6; It is characterized in that; Described outflow valve gear comprises sealing ring (29), spring (30), conduit (31), pilot sleeve (32) and valve hand (33); Sealing ring (29) is arranged on conduit (31) upper end; Pilot sleeve (32) and nested connection of conduit (31), spring (30) are arranged between pilot sleeve (32) and the conduit (31), and valve hand (33) is arranged on conduit (31) lower end.
8. a kind of twin coil formula magnetic current and liquid flow variation characteristic proving installation according to claim 1 is characterized in that the lateral surface of the medial surface of described moving coil (18) and stationary disk (16) is provided with O-ring seal (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200233582U CN202471552U (en) | 2012-01-19 | 2012-01-19 | Two-coil type device for testing rheological property of magnetorheogical fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200233582U CN202471552U (en) | 2012-01-19 | 2012-01-19 | Two-coil type device for testing rheological property of magnetorheogical fluid |
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| Publication Number | Publication Date |
|---|---|
| CN202471552U true CN202471552U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200233582U Withdrawn - After Issue CN202471552U (en) | 2012-01-19 | 2012-01-19 | Two-coil type device for testing rheological property of magnetorheogical fluid |
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| CN (1) | CN202471552U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539288A (en) * | 2012-01-19 | 2012-07-04 | 中国矿业大学 | Double-coil type magnetorheological fluid rheological characteristic testing device |
| CN103674783A (en) * | 2013-12-20 | 2014-03-26 | 上海应用技术学院 | Double-coil magneto-rheological fluid performance test device |
| CN103837444A (en) * | 2014-03-07 | 2014-06-04 | 黑龙江工程学院 | Alternate reverse-magnetic-field variable magnetorheological fluid performance testing device and testing method |
| CN103901168A (en) * | 2014-04-08 | 2014-07-02 | 中国矿业大学 | Magnetorheological fluid behavior tester |
-
2012
- 2012-01-19 CN CN2012200233582U patent/CN202471552U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539288A (en) * | 2012-01-19 | 2012-07-04 | 中国矿业大学 | Double-coil type magnetorheological fluid rheological characteristic testing device |
| CN102539288B (en) * | 2012-01-19 | 2014-07-23 | 中国矿业大学 | Double-coil type magnetorheological fluid rheological characteristic testing device |
| CN103674783A (en) * | 2013-12-20 | 2014-03-26 | 上海应用技术学院 | Double-coil magneto-rheological fluid performance test device |
| CN103837444A (en) * | 2014-03-07 | 2014-06-04 | 黑龙江工程学院 | Alternate reverse-magnetic-field variable magnetorheological fluid performance testing device and testing method |
| CN103901168A (en) * | 2014-04-08 | 2014-07-02 | 中国矿业大学 | Magnetorheological fluid behavior tester |
| CN103901168B (en) * | 2014-04-08 | 2015-09-23 | 中国矿业大学 | A kind of magnetic flow liquid characteristic tester |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121003 Effective date of abandoning: 20140723 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121003 Effective date of abandoning: 20140723 |
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| RGAV | Abandon patent right to avoid regrant |