CN104266821A - Bag type testing device for extrusion flow dynamics characteristics of magnetorheological fluid - Google Patents
Bag type testing device for extrusion flow dynamics characteristics of magnetorheological fluid Download PDFInfo
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- CN104266821A CN104266821A CN201410557910.XA CN201410557910A CN104266821A CN 104266821 A CN104266821 A CN 104266821A CN 201410557910 A CN201410557910 A CN 201410557910A CN 104266821 A CN104266821 A CN 104266821A
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- end cover
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Abstract
The invention discloses a bag type testing device for the extrusion flow dynamics characteristics of magnetorheological fluid. The testing device comprises a flexible bag. The upper edge of the flexible bag is clamped and sealed through an upper end cover and an upper guide base which are coaxially installed, the lower edge of the flexible bag is clamped and sealed through a lower end cover and a lower guide base which are coaxially installed, and a magnet exciting coil is arranged on the outer side the flexible bag and inside an outer cylinder tube; the flexible bag, the upper end cover and the lower end cover form a working cavity, and the magnetorheological fluid or other liquids to be tested are injected into the working cavity; the flexible bag, the upper guide base and the lower guide base form a guide cavity, and the guide cavity guides extrusion deformation of the flexible bag. The testing device can be used for testing the extrusion or stretch flow dynamics characteristics of the magnetorheological fluid, particularly the extrusion or stretch flow dynamics characteristics of the magnetorheological fluid under high-frequency excitation; the testing device can also be used for testing the equal-size or equal-area extrusion flow dynamics characteristics of other fluids.
Description
Technical field
The invention belongs to non-Newtonian fluid squeezing flow Dynamical Characteristics field, be specifically related to a kind of bellows magnetic flow liquid squeezing flow dynamic property test device.
Background technology
Field all extensive application such as the motor of squeezing flow in modern industry, bearing and lubrication.The intellectual material that magnetic flow liquid can regulate as a kind of rheological characteristics, is also widely used in every field.The pressure produced under other patterns of the pressure ratio produced under magnetic flow liquid squeeze mode all wants high, can be used for the vibration of isolation and the small size large load of decay.At present to the research of magnetic flow liquid extruding rheological characteristics, major part is confined to the research of the dynamic perfromance under static state, quasistatic or low-frequency excitation, perfect not enough to the research of the dynamic perfromance under high frequency pumping and mechanism thereof, under its high frequency pumping characteristic and mechanism urgently to be resolved hurrily.
Summary of the invention
The invention provides the proving installation of a kind of magnetic flow liquid equal-volume or homalographic squeezing flow dynamics, can be used for the magnetic flow liquid extruding under the extruding of test magnetic flow liquid or elongational flow dynamics, particularly high frequency pumping or elongational flow dynamics; Also can be used for the test of other fluid equal-volumes or homalographic squeezing flow dynamics.
The technical scheme that the present invention takes is:
A kind of bellows magnetic flow liquid squeezing flow dynamic property test device, comprise flexible bags 5, described flexible bags 5 upper edge is by coaxial mounted upper end cover 2 and upper guide holder 4 pinch seal, flexible bags 5 lower edge is by coaxial mounted bottom end cover 9 and lower guide holder 7 pinch seal, and outside, outer cylinder 8 inside of flexible bags 5 are provided with field coil 6; Form working chamber A between described flexible bags 5, upper end cover 2 and bottom end cover 9, in working chamber A, inject magnetic flow liquid or other testing liquids; Form guiding cavity B between described flexible bags 5, upper guide holder 4 and lower guide holder 7, guide the crimp of flexible bags 5.
Also comprise upper flange plate 1 and lower flange 10, upper flange plate 1 is fixedly connected with outer cylinder 8, and compresses upper end cover 2, and lower flange 10 is fixedly connected with bottom end cover 9.
Being provided with between described upper end cover 2 and upper guide holder 4 and adjusting pad 3, regulating by regulating the primary clearance of thickness to working chamber A of adjustment pad 3.
Described upper end cover 2 has bullport 2a, has two threaded hole 2b and 2c in bullport 2a lower end, be respectively filling orifice and vent port, and use hexagon socket head cap screw and rubber sheet gasket sealing; Described upper end cover 2 is also provided with connecting thread, is connected with upper guide holder 4; Bottom end cover 9 is provided with connecting thread, is connected with lower guide holder 7.
Described flexible bags 5 two ends are provided with O-ring seal 5a and lower seal 5b.
Described upper guide holder 4 is the same with lower guide holder 7 structure, and upper guide holder 4 and lower guide holder 7 are respectively equipped with seal groove 4a and lower seal groove cavity 7a, installs the upper O-ring seal 5a and lower seal 5b at flexible bags 5 two ends respectively.
The material of described upper guide holder 4 and lower guide holder 7 is NULL, and now magnetic induction line is respectively by upper end cover 2, outer cylinder 8, bottom end cover 9 and magnetic flow liquid, forms closed-loop path; The center section of working chamber A, namely the magnetic flow liquid between upper end cover 2, bottom end cover 9 is effective coverage, there is equally distributed magnetic field, and the cross-sectional area of effective coverage is identical, and the magnetic flow liquid be expressed to outside upper end cover 2, bottom end cover 9 is inactive area, there is low-intensity magnetic field.
The material of described upper guide holder 4 and lower guide holder 7 is permeability magnetic material, and now magnetic induction line is respectively by upper end cover 2, upper guide holder 4, outer cylinder 8, bottom end cover 9, lower guide holder 7 and magnetic flow liquid, and forms closed-loop path; Whole working chamber A is effective coverage, and the volume of the magnetic flow liquid in effective coverage keeps constant.
Described outer cylinder 8 inwall is provided with the unthreaded hole of different inner diameters, is formed respectively and coordinates, ensure the right alignment of test unit of the present invention with upper flange plate 1, upper end cover 2 and bottom end cover 9.
Described outer cylinder 8 has fairlead 8a, is drawn by field coil 6; Described outer cylinder 8 has some air hole 8b; Two or more field coils 6 can be laid in described outer cylinder 8 inside.
The course of work of the present invention is as follows:
First, be connected with the load transducer of shaking table test board by described upper flange plate 1, lower flange 10 is connected as moved end with shaking table.
Secondly, shaking table start, lower flange 10 drives bottom end cover 9 and the to-and-fro movement of lower guide holder 7, thus the extruding realized magnetic flow liquid and the excitation that stretches.
Meanwhile, shaking table sensor Real-Time Monitoring and record experimental provision response in test and dynamics.The magnetic flow liquid squeezing flow dynamic characterization measurement of different primary clearance just can be realized by the thickness changing adjustment pad 3; By changing upper guide holder 4, the material of lower guide holder 7 can realize the test of magnetic flow liquid equal-volume and homalographic squeezing flow dynamics; Magnetic flow liquid squeezing flow dynamics under different magnetic field intensity can be tested by the size of current changed in coil; The vibration signal exported by changing shaking table can be tested quasi-static, the magnetic flow liquid squeezing flow dynamics dynamically especially under high-frequency excitation; Also the environmental cabinet temperature of adjustable shaking table, research temperature is to the affecting laws of magnetic flow liquid squeezing flow dynamics.
The present invention has the following advantages and good effect:
1, magnetic flow liquid compression properties proving installation of the present invention utilizes flexible bags to carry out self sealss, can test magnetic flow liquid elongational flow dynamics simultaneously.Compare with the fluid compression flowing dynamics characteristic test device of infiltration type, avoid the impact of air on test findings; Compare with fluid compression flowing dynamics characteristic test device in the form of piston, avoid the impact of piston rod place friction force.
2, the present invention is provided with adjustment stroke, is provided with adjustment pad between upper end cover and upper guide holder, by changing the thickness of pad, can realize the adjustment of working chamber primary clearance easily.
3, in the present invention, guide holder and lower guide holder can adopt permeability magnetic material, can realize the test of magnetic flow liquid equal-volume squeezing flow characteristic; Also can adopt non-magnet_conductible material, the test of magnetic flow liquid homalographic squeezing flow characteristic can be realized.
4, this device upper end cover, bottom end cover and outer cylinder adopt permeability magnetic material, and borehole in the middle of upper end cover, optimize Distribution of Magnetic Field, strengthen the magnetic field intensity of working chamber; Simultaneously upper flange plate, lower flange adopt NULL, and the sensor of the magnetic field avoiding field coil to produce pair and its connection device has an impact.
Accompanying drawing explanation
Fig. 1 is bellows magnetic flow liquid squeezing flow dynamic property test device sectional view.
Fig. 2 is upper end cover sectional view.
Fig. 3 is upper guide holder (lower guide holder) sectional view.
Fig. 4 is flexible bags sectional view.
Fig. 5 is outer cylinder sectional view.
Fig. 6 is proving installation Distribution of Magnetic Field figure under original state.
Fig. 7 is magnetic flow liquid homalographic squeezing flow Distribution of Magnetic Field figure.
Fig. 8 is magnetic flow liquid equal-volume squeezing flow Distribution of Magnetic Field figure.
In figure:
1, upper flange plate; 2, upper end cover; 2a, bullport; 2b, filling orifice; 2c, vent port;
3, pad is adjusted; 4, upper guide holder; 4a, upper seal groove;
5, flexible bags; 5a, upper O-ring seal; 5b, lower seal;
6, field coil; 7, lower guide holder; 7a, lower seal groove cavity;
8, outer cylinder; 8a, fairlead; 8b, air hole;
9, bottom end cover; 10; Lower flange;
A, working chamber; B, guiding cavity; L, adjustment stroke; S, coupling bolt.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
A kind of bellows magnetic flow liquid squeezing flow dynamic property test device as described in Figure 1, comprise flexible bags 5, flexible bags 5 upper edge is by coaxial mounted upper end cover 2 and upper guide holder 4 pinch seal, flexible bags 5 lower edge is by coaxial mounted bottom end cover 9 and lower guide holder 7 pinch seal, and outside, outer cylinder 8 inside of flexible bags 5 are provided with field coil 6; Form working chamber A between described flexible bags 5, upper end cover 2 and bottom end cover 9, in working chamber A, inject magnetic flow liquid or other testing liquids; Form guiding cavity B between described flexible bags 5, upper guide holder 4 and lower guide holder 7, guide the crimp of flexible bags 5.
Preferably, also comprise upper flange plate 1 and lower flange 10, be connected by bolt S between upper flange plate 1 with outer cylinder 8, and compress upper end cover 2, lower flange 10 is fixedly connected with bottom end cover 9, and upper flange plate 1 and lower flange 10 are for the connection of proving installation of the present invention and vibration table or other equipment.
Preferably, be provided with between described upper end cover 2 and upper guide holder 4 and adjust stroke L, be provided with adjustment pad 3, by the primary clearance regulating the thickness of adjustment pad 3 to regulate working chamber A.
Preferably, as shown in Figure 2, described upper end cover 2 has bullport 2a, distribute for guiding magnetic field, under original state, Distribution of Magnetic Field figure as shown in Figure 6, have two threaded hole 2b and 2c in bullport 2a lower end, be respectively filling orifice and vent port, and use hexagon socket head cap screw and rubber sheet gasket sealing;
Described upper end cover 2 is also provided with connecting thread, and be connected with upper guide holder 4, bottom end cover 9 is provided with connecting thread, is connected with lower guide holder 7;
Described flexible bags 5 two ends are provided with O-ring seal 5a and lower seal 5b, as shown in Figure 4, are used for realizing self sealss;
Described upper guide holder 4 is the same with lower guide holder 7 structure, and as shown in Figure 3, and upper guide holder 4 and lower guide holder 7 are respectively equipped with seal groove 4a and lower seal groove cavity 7a, is used for laying the upper O-ring seal 5a and lower seal 5b at flexible bags 5 two ends;
The material of described upper guide holder 4 and lower guide holder 7 can select NULL, for the magnetic flow liquid squeezing flow Dynamical Characteristics of homalographic, Distribution of Magnetic Field figure under squeezed state as shown in Figure 7, now magnetic induction line is respectively by upper end cover 2, outer cylinder 8, bottom end cover 9 and magnetic flow liquid, and forms closed-loop path.The center section of working chamber A, the magnetic flow liquid namely between upper end cover 2, bottom end cover 9 is effective coverage, there is equally distributed magnetic field, and the magnetic flow liquid be expressed to outside upper end cover 2, bottom end cover 9 is inactive area, and magnetic field is very weak, can ignore.Cross-sectional area now in effective coverage keeps constant, can realize the test of magnetic flow liquid homalographic squeezing flow dynamics.
The material of described upper guide holder 4 and lower guide holder 7 can select permeability magnetic material, for isopyknic magnetic flow liquid squeezing flow Dynamical Characteristics, Distribution of Magnetic Field figure under its squeezed state as shown in Figure 8, now magnetic induction line is respectively by upper end cover 2, upper guide holder 4, outer cylinder 8, bottom end cover 9, lower guide holder 7 and magnetic flow liquid, and forms closed-loop path.Whole working chamber A is effective coverage, and the volume of the magnetic flow liquid in effective coverage keeps constant, can realize the test of magnetic flow liquid equal-volume squeezing flow dynamics.
Described outer cylinder 8 inwall is provided with different inner diameters unthreaded hole, forms the right alignment coordinating and ensure test unit of the present invention respectively with upper flange plate 1, upper end cover 2 and bottom end cover 9;
As shown in Figure 5, described outer cylinder 8 has fairlead 8a, for the extraction of field coil 6; Described outer cylinder 8 has some air hole 8b, with the circulation of air in warranty test process, avoids air pressure change on the impact of test findings.
Optionally, outer cylinder 8 and the connected mode of upper flange plate 1 can be threaded, interference is connected, weld;
Optionally, the seal groove laying the upper O-ring seal 5a and lower seal 5b at flexible bags 5 two ends can be located on upper end cover 2 and upper end cover 7;
Optionally, two or more coils can be laid to strengthen magnetic field intensity in outer cylinder 8 inside.
The course of work of the present invention is as follows:
First, be connected with the load transducer of shaking table test board by described upper flange plate 1, lower flange 10 is connected as moved end with shaking table, and under original state, proving installation Distribution of Magnetic Field figure as shown in Figure 6.
Secondly, shaking table start, lower flange 10 drives bottom end cover 9 and the to-and-fro movement of lower guide holder 7, thus the extruding realized magnetic flow liquid and the excitation that stretches.
Meanwhile, shaking table sensor Real-Time Monitoring and record experimental provision response in test and dynamics.The magnetic flow liquid squeezing flow dynamic characterization measurement of different primary clearance just can be realized by the thickness changing adjustment pad 3; By changing upper guide holder 4, the material of lower guide holder 7 can realize the test of magnetic flow liquid equal-volume and homalographic squeezing flow dynamics; Magnetic flow liquid squeezing flow dynamics under different magnetic field intensity can be tested by the size of current changed in coil; The vibration signal exported by changing shaking table can be tested quasi-static, the magnetic flow liquid squeezing flow dynamics dynamically especially under high-frequency excitation; Also the environmental cabinet temperature of adjustable shaking table, research temperature is to the affecting laws of magnetic flow liquid squeezing flow dynamics.
Claims (10)
1. a bellows magnetic flow liquid squeezing flow dynamic property test device, it is characterized in that: comprise flexible bags (5), described flexible bags (5) upper edge is by coaxial mounted upper end cover (2) and upper guide holder (4) pinch seal, flexible bags (5) lower edge is by coaxial mounted bottom end cover (9) and lower guide holder (7) pinch seal, and outside, outer cylinder (8) inside of flexible bags (5) are provided with field coil (6); Form working chamber (A) between described flexible bags (5), upper end cover (2) and bottom end cover (9), in working chamber (A), inject magnetic flow liquid or other testing liquids; Form guiding cavity (B) between described flexible bags (5), upper guide holder (4) and lower guide holder (7), guide the crimp of flexible bags (5).
2. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, it is characterized in that: also comprise upper flange plate (1) and lower flange (10), upper flange plate (1) is fixedly connected with outer cylinder (8), and compressing upper end cover (2), lower flange (10) is fixedly connected with bottom end cover (9).
3. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, it is characterized in that: be provided with between described upper end cover (2) and upper guide holder (4) and adjust pad (3), regulating by regulating the primary clearance of thickness to working chamber (A) of adjustment pad (3).
4. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, it is characterized in that: described upper end cover (2) has bullport (2a), two threaded holes (2b) and (2c) is had in bullport (2a) lower end, be respectively filling orifice and vent port, and use hexagon socket head cap screw and rubber sheet gasket sealing; (2) are also provided with connecting thread to described upper end cover, are connected with upper guide holder (4); Bottom end cover (9) is provided with connecting thread, is connected with lower guide holder (7).
5. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, is characterized in that: described flexible bags (5) two ends are provided with O-ring seal (5a) and lower seal (5b).
6. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 5, it is characterized in that: described upper guide holder (4) is the same with lower guide holder (7) structure, and upper guide holder (4) and lower guide holder (7) are respectively equipped with seal groove (4a) and lower seal groove cavity (7a), upper O-ring seal (5a) and the lower seal (5b) at flexible bags (5) two ends is installed respectively.
7. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, it is characterized in that: the material of described upper guide holder (4) and lower guide holder (7) is NULL, now magnetic induction line is respectively by upper end cover (2), outer cylinder (8), bottom end cover (9) and magnetic flow liquid, forms closed-loop path; The center section of working chamber (A), namely the magnetic flow liquid between upper end cover (2), bottom end cover (9) is effective coverage, there is equally distributed magnetic field, the cross-sectional area of effective coverage is identical, and the magnetic flow liquid be expressed to outside upper end cover (2), bottom end cover (9) is inactive area, there is low-intensity magnetic field.
8. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, it is characterized in that: the material of described upper guide holder (4) and lower guide holder (7) is permeability magnetic material, now magnetic induction line is respectively by upper end cover (2), upper guide holder (4), outer cylinder (8), bottom end cover (9), lower guide holder (7) and magnetic flow liquid, and forms closed-loop path; Whole working chamber (A) is all effective coverage, and the volume of the magnetic flow liquid in effective coverage keeps constant.
9. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, it is characterized in that: described outer cylinder (8) inwall is provided with the unthreaded hole of different inner diameters, formed with upper flange plate (1), upper end cover (2) and bottom end cover (9) respectively and coordinate, ensure the right alignment of test unit of the present invention.
10. a kind of bellows magnetic flow liquid squeezing flow dynamic property test device according to claim 1, is characterized in that: described outer cylinder (8) has fairlead (8a), is drawn by field coil (6); Described outer cylinder (8) has some air holes (8b); Two or more field coils (6) can be laid in described outer cylinder (8) inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557910.XA CN104266821B (en) | 2014-10-17 | 2014-10-17 | A kind of bellows magnetic flow liquid extruding flowing dynamics characteristic test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557910.XA CN104266821B (en) | 2014-10-17 | 2014-10-17 | A kind of bellows magnetic flow liquid extruding flowing dynamics characteristic test device |
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| CN104266821A true CN104266821A (en) | 2015-01-07 |
| CN104266821B CN104266821B (en) | 2016-09-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776153A (en) * | 2015-04-21 | 2015-07-15 | 合肥工业大学 | Magnetorheological fluid suspension based on unidirectional pressing mode |
| CN109158801A (en) * | 2018-10-16 | 2019-01-08 | 宁夏吴忠市好运电焊机有限公司 | Built-up welding magnetorheological fluid robust connector for welding robot |
-
2014
- 2014-10-17 CN CN201410557910.XA patent/CN104266821B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776153A (en) * | 2015-04-21 | 2015-07-15 | 合肥工业大学 | Magnetorheological fluid suspension based on unidirectional pressing mode |
| CN109158801A (en) * | 2018-10-16 | 2019-01-08 | 宁夏吴忠市好运电焊机有限公司 | Built-up welding magnetorheological fluid robust connector for welding robot |
| CN109158801B (en) * | 2018-10-16 | 2020-07-24 | 宁夏吴忠市好运电焊机有限公司 | Magnetorheological fluid stabilizing connector for surfacing welding of welding robot |
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| Publication number | Publication date |
|---|---|
| CN104266821B (en) | 2016-09-21 |
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