Device for testing settleability of magnetorheological fluid

Abstract

The utility model relates to a device for testing settleability of magnetorheological fluid. The device comprises a rotating mechanism and a driving mechanism, wherein the rotating mechanism comprises a rotating drum, a tubular part and a coil; the rotary drum is constructed to be of a circular truncated cone-shaped structure and is constructed to rotate along the axis of the rotary drum; an inverted-cone-shaped cavity is formed in the top face of the rotary drum. A plurality of tubular parts are symmetrically arranged at the end, close to the cavity, in the rotary drum along the axis, and pipe openings of the tubular parts are formed in the conical surface formed by the cavity and communicate with the cavity. The rotary drum is suitable for containing magnetorheological fluid and centrifugally separating the magnetorheological fluid in response to rotation of the rotary drum; a coil is wound on the outer side of the tubular part and is suitable for generating a magnetic field in the tubular part in response to conduction of current; the driving mechanism is connected with the rotating mechanism and suitable for driving the rotating mechanism to rotate.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal separation of magnetorheological fluid components and material performance detection, in particular to a device for testing the sedimentation of magnetorheological fluid. Background Art

[0002] Magnetorheological fluid is a smart material that has different viscosities under different magnetic field environments, and has the characteristics of reversible rheological properties and short response time. It has broad application prospects in engineering control devices, automotive shock absorption, damping control, device polishing, precision instrument processing and other fields.

[0003] However, since the magnetorheological fluid is a suspension composed of magnetic particles and a dispersion medium, the density difference between the magnetic particles and the dispersion medium is too large. Therefore, when the magnetorheological fluid is left standing for a long time, it will settle, causing the working performance of the device using the magnetorheological fluid as the working medium to change. In severe cases, it may even cause the magnetorheological fluid to fail and shorten the service life of the magnetorheological fluid. Therefore, the sedimentation condition of the magnetorheological fluid is an important indicator for evaluating the performance of the magnetorheological fluid.

[0004] The current test of the sedimentation stability of magnetorheological fluid is mainly aimed at some physical phenomena caused by the stratification between magnetic particles and dispersed carrier liquid during the sedimentation process, such as the uneven sedimentation potential and system density. The evaluation method is proposed based on the above physical phenomena through the changes in physical quantities such as light and electricity. For example, the sedimentation rate is characterized by measuring the change in potential during the sedimentation process, the degree of sedimentation is detected by testing the light transmittance of the magnetorheological fluid, and the natural sedimentation static observation method, that is, the measuring cylinder containing the magnetorheological fluid is placed statically, and the stability of the magnetorheological fluid is characterized by observing the solid-liquid stratification, etc. The above methods generally have the disadvantages of long test cycles and large sample quantities. Utility Model Content

[0005] In order to solve at least one technical problem in the prior art and other aspects, the utility model provides a device for testing the sedimentation properties of magnetorheological fluid. Based on the centrifugal effect, the sedimentation speed of particles in the liquid can be accelerated so that the magnetorheological fluid can settle quickly. In addition, based on the actual application scenario, which is often in a magnetic field environment, a coil is configured so that the magnetorheological fluid to be tested is in a controllable magnetic field, thereby quickly testing the sedimentation performance of the magnetorheological fluid under different magnetic fields.

[0006] The utility model provides a device for testing the sedimentation property of magnetorheological fluid, comprising a rotating mechanism, wherein the rotating mechanism comprises a rotating drum, the rotating drum is constructed into a truncated cone structure and is constructed to rotate along the axis of the rotating drum; wherein an inverted conical cavity is arranged on the top surface of the rotating drum; a plurality of tubular parts are symmetrically arranged along the axis at one end of the rotating drum close to the cavity, the pipe openings of the tubular parts are arranged on the conical surface formed by the cavity and are connected with the cavity; the device is suitable for accommodating magnetorheological fluid and centrifugally separating the magnetorheological fluid in response to the rotation of the rotating drum; a coil is wound around the outer side of the tubular part, which is suitable for generating a magnetic field in the tubular part in response to the conduction of an electric current; and a driving mechanism is connected with the rotating mechanism and is suitable for driving the rotating mechanism to rotate.

[0007] According to an embodiment of the utility model, the rotating mechanism further comprises a rotating disk, which is fixedly connected to the bottom surface of the rotating drum so as to rotate simultaneously in response to the rotation of the rotating drum.

[0008] According to an embodiment of the utility model, the above-mentioned rotating mechanism also includes a supporting seat, which is installed on the working surface, wherein the turntable is sleeved on the upper part of the supporting seat and is configured to rotate relative to the supporting seat.

[0009] According to an embodiment of the utility model, a first power source is arranged on the outer wall of the support seat, and the first power source is configured to be electrically connected to the coil; wherein the first power source is configured to have adjustable current to adjust the strength of the magnetic field formed by the coil.

[0010] According to the embodiment of the utility model, a brush slip ring electrically connected to the coil is arranged in the turntable; a brush corresponding to the brush slip ring is arranged at the joint between the support seat and the turntable, which is suitable for connecting the brush slip ring to the first power supply.

[0011] According to an embodiment of the utility model, the driving mechanism includes: a rotating shaft, a first end of the rotating shaft is detachably installed in the rotating drum, suitable for driving the rotating drum to rotate; a motor, rotatably connected to the second end of the rotating shaft, suitable for driving the rotating shaft to rotate; and a second power supply, electrically connected to the motor, to supply power to the motor.

[0012] According to an embodiment of the utility model, the first end of the rotating shaft is configured as a T-shaped structure and is embedded into the rotating drum through a cavity so as to be integrally connected with the rotating drum.

[0013] According to an embodiment of the utility model, a support frame is also included, which is suitable for supporting the motor.

[0014] According to an embodiment of the utility model, it also includes a drum cover, which covers the opening formed by the cavity and is suitable for sealing the cavity; wherein the drum cover includes two semi-annular cover bodies, and the two cover bodies are suitable for being symmetrically arranged on both sides of the rotating shaft to cover the opening formed by the cavity in the spliced ​​state.

[0015] According to an embodiment of the utility model, the joints of the two covers are connected by magnetic attraction.

[0016] According to the device for testing the sedimentation property of magnetorheological fluid provided by the utility model, a rotating drum capable of rotating around an axis and a plurality of tubular parts symmetrically arranged along the axis are arranged on the rotating drum, and the magnetorheological fluid is placed in the tubular part by utilizing the principle of rapid centrifugal sedimentation to quickly test the sedimentation property of the magnetorheological fluid. By configuring a coil on the tubular part and utilizing the principle of electromagnetism, an electromagnetic field can be formed in the tubular part by passing current through the coil, thereby quickly testing the sedimentation property of the magnetorheological fluid under a magnetic field; by changing the magnetic field by changing the coil current, the stability of the magnetorheological fluid under different magnetic fields can be characterized, thereby obtaining a suitable magnetic field for the magnetorheological fluid to be used stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of a device for testing the sedimentation property of magnetorheological fluid according to an illustrative embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the sedimentation of magnetorheological fluid in a tubular member according to an illustrative embodiment of the utility model.

[0019] Reference numerals

[0020] 1. Rotation mechanism;

[0021] 11. Rotating drum;

[0022] 12. Tubular parts;

[0023] 13. Coil;

[0024] 14. Cylinder cover;

[0025] 15. Turntable;

[0026] 16. Brush slip ring;

[0027] 17. Brush;

[0028] 18. Support seat;

[0029] 19. Fixing bolts;

[0030] 2. Driving mechanism;

[0031] 21. Rotation axis;

[0032] 22. Motor;

[0033] 23. Second power source;

[0034] 3. The first power source;

[0035] 4. Support frame. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0037] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "include", "comprises", etc. used herein indicate the existence of features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0038] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0039] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0040] Figure 1 It is a cross-sectional view of a device for testing the sedimentation property of magnetorheological fluid according to an illustrative embodiment of the utility model.

[0041] The utility model provides a device for testing the sedimentation property of magnetorheological fluid, such as Figure 1 As shown, it includes a rotating mechanism 1 and a driving mechanism 2. The rotating mechanism 1 includes a rotating drum 11, a tubular member 12 and a coil 13; the rotating drum 11 is configured as a truncated cone structure and is configured to rotate along the axis of the rotating drum 11; the top surface of the rotating drum 11 is provided with an inverted conical cavity; a plurality of tubular members 12 are symmetrically arranged along the axis at one end of the rotating drum 11 close to the cavity, and the tube mouths of the tubular members 12 are arranged on the conical surface formed by the cavity and communicated with the cavity; it is suitable for containing magnetorheological fluid and centrifugally separating the magnetorheological fluid in response to the rotation of the rotating drum 11; the outer side of the tubular member 12 is wound with a coil 13, which is suitable for generating a magnetic field in the tubular member 12 in response to the conduction of current; the driving mechanism 2 is connected to the rotating mechanism 1, and is suitable for driving the rotating mechanism 1 to rotate.

[0042] In such an embodiment, by configuring a rotating drum 11 that can rotate around an axis and arranging a plurality of tubular members 12 symmetrically arranged along the axis on the rotating drum 11, the magnetorheological fluid is placed in the tubular member 12 by using the principle of centrifugal rapid sedimentation, and the sedimentation performance of the magnetorheological fluid can be quickly tested. By configuring a coil 13 on the tubular member 12, and using the principle of electromagnetism, an electromagnetic field can be formed in the tubular member 12 by passing a current through the coil 13, so that the sedimentation performance of the magnetorheological fluid under a magnetic field can be quickly tested; by changing the current of the coil 13 to change the magnetic field, the stability of the magnetorheological fluid under different magnetic fields can be characterized, so as to obtain a suitable magnetic field for the magnetorheological fluid to be used stably.

[0043] In an illustrative embodiment, the material of the drum 11 includes but is not limited to pure iron, low carbon steel, iron-silicon alloy, nickel-iron alloy; the material of the tubular member 12 includes but is not limited to non-magnetic materials such as copper or aluminum.

[0044] In an illustrative embodiment, the volume of the magnetorheological fluid sample placed in the tubular member 12 cannot exceed 2 / 3 of the volume of the tubular member 12, the mass difference of the magnetorheological fluid samples between different tubular members 12 is within 0.1 g, and each tubular member 12 is equipped with a plugging cap to prevent the magnetorheological fluid from overflowing during rotation.

[0045] According to the embodiments of the present utility model, Figure 1 As shown, the rotating mechanism 1 further comprises a rotating disk 15 , which is fixedly connected to the bottom surface of the rotating drum 11 so as to rotate simultaneously in response to the rotation of the rotating drum 11 .

[0046] In an illustrative embodiment, Figure 1 As shown, the turntable 15 and the drum 11 are detachably mounted together, and the turntable 15 and the drum 11 are fixedly connected by a plurality of fixing bolts 19 to maintain stability during rotation. Optionally, the turntable 15 and the drum 11 can also be set as an integrated structure through a mold.

[0047] According to the embodiments of the present utility model, Figure 1 As shown, the rotating mechanism 1 further includes a supporting seat 18 , which is installed on a working surface, wherein the turntable 15 is sleeved on the upper portion of the supporting seat 18 and is configured to rotate relative to the supporting seat 18 .

[0048] In such an embodiment, the turntable 15 and the drum 11 are combined to serve as a rotor, and the support seat 18 serves as a stator; driven by the driving mechanism 2 , the turntable 15 and the drum 11 can rotate relative to the support seat 18 .

[0049] In an illustrative embodiment, Figure 1As shown, the support seat 18 is also configured to include a connection portion connected to the rotating drum 11 and a support portion at one end away from the rotating drum 11; the cross-sectional diameter of the support portion gradually increases from top to bottom to ensure the stability of the support seat 18. In one embodiment, the support seat 18 is connected to the rotating drum 11 through a rotatable connecting shaft to ensure the stability of the rotation connection between the rotating mechanism 1 and the support seat 18 when rotating.

[0050] According to an embodiment of the utility model, a first power source 3 is arranged on the outer wall of the support seat 18 , and the first power source 3 is configured to be electrically connected to the coil 13 , wherein the first power source 3 is configured to have adjustable current to adjust the magnetic field strength formed by the coil 13 .

[0051] In such an embodiment, the current of the coil 13 is turned on by the first power source 3 to generate a magnetic field in the tubular member 12. The magnitude of the current of the first power source 3 is adjusted to control the change of the magnetic field in the tubular member 12 to test the sedimentation performance of the magnetorheological fluid under different magnetic fields. The first power source 3 is arranged on the outer wall of the support seat 18, which can also facilitate the adjustment of the current to change the magnetic field in the tubular member 12 when the device is rotating.

[0052] According to the embodiment of the utility model, a brush slip ring 16 electrically connected to the coil 13 is arranged in the turntable 15; a brush 17 corresponding to the brush slip ring 16 is arranged at the joint between the support seat 18 and the turntable 15, which is suitable for conducting the brush slip ring 16 and the first power supply 3.

[0053] In such an embodiment, a brush slip ring 16 is provided in a turntable 15 serving as a rotor, and a brush 17 is provided in a support seat 18 serving as a stator. Through the cooperation of the brush 17 and the brush slip ring 16, current can be conducted through the coil 13 to generate a magnetic field in the tubular member 12. At the same time, the cooperation of the brush 17 and the brush slip ring 16 can avoid the problem of wire entanglement of the coil 13 during the rotation process.

[0054] According to an embodiment of the utility model, the driving mechanism 2 includes a rotating shaft 21, a motor 22 and a second power source 23. The first end of the rotating shaft 21 is detachably mounted in the drum, and is suitable for driving the drum to rotate; the motor 22 is rotatably connected to the second end of the rotating shaft 21, and is suitable for driving the rotating shaft 21 to rotate; the second power source 23 is electrically connected to the motor 22, and supplies power to the motor 22.

[0055] In an exemplary embodiment, the magnitude of the current I of the coil 13 is controlled by the first power supply 3, and the rotation time t and the rotation speed v of the motor 22 are controlled by the second power supply 23. For example, different rotation speeds v and currents I can be selected with the same rotation time. In detail, v=2000rpm, t=10min, I=1A; v=2000rpm, t=10min, I=2A; v=2000rpm, t=10min, I=3A; v=5000rpm, t=10min, I=1A; v=5000rpm, t=10min, I=2A; v=5000rpm, t=10min, I=3A; v=7000rpm, t=10min, I=1A; v=7000rpm, t=10min, I=2A; v=7000rpm, t=10min, I=3A can be set to obtain the relationship between the sedimentation performance of the magnetorheological fluid under different rotation speeds and different magnetic fields within a certain period of time.

[0056] According to an embodiment of the utility model, the first end of the rotating shaft 21 is configured as a T-shaped structure and is embedded into the rotating drum 11 through a cavity to be integrally connected with the rotating drum 11 .

[0057] In such an embodiment, the first end of the rotating shaft 21 is configured as a T-shaped structure, so that the connection between the rotating shaft 21 and the drum body is more stable, thereby ensuring the stability of the connection between the rotating shaft 21 and the drum 11 when the rotating drum 11 rotates.

[0058] In an illustrative embodiment, a square groove is further provided at the joint between the rotating drum 11 and the rotating shaft 21 to facilitate the matching installation with the rotating shaft 21 .

[0059] According to an embodiment of the utility model, a support frame 4 is further included, which is suitable for supporting the motor 22 .

[0060] In an illustrative embodiment, the support frame 4 includes a base with a large mass, a plurality of iron rods and a support plate. In detail, the iron rods include a plurality of vertical iron rods fixedly connected to the base, and a plurality of horizontal iron rods connected to the vertical iron rods, and the support plate is fixed to the horizontal iron rods to install and fix the motor 22. Among them, a cross clamp is installed on the vertical iron rod, and the height of the horizontal iron rod is adjusted by the cross clamp.

[0061] According to an embodiment of the utility model, it also includes a cylinder cover 14, which covers the opening formed by the cavity and is suitable for sealing the cavity; wherein the cylinder cover 14 includes two semi-annular cover bodies, and the two cover bodies are suitable for being symmetrically arranged on both sides of the rotating shaft 21 to cover the opening formed by the cavity in the spliced ​​state.

[0062] In such an embodiment, by symmetrically arranging two semi-circular covers on both sides of the rotating shaft 21 , the covers can be opened easily to facilitate the insertion and removal of the tubular member 12 .

[0063] According to an embodiment of the utility model, the joints of the two covers are connected by magnetic attraction.

[0064] In such an embodiment, the two covers connected by magnetic attraction can ensure that they remain tightly closed when the drum 11 rotates.

[0065] Figure 2 It is a schematic diagram of the sedimentation of magnetorheological fluid in a tubular member 12 according to an illustrative embodiment of the utility model.

[0066] In an illustrative embodiment, Figure 2 As shown, after centrifugal separation by the rotating mechanism 1, the carrier liquid and magnetic particles of the magnetorheological fluid in the tubular member 12 are separated, and the liquid level is measured with a ruler. The total liquid level is recorded as L1, and the solid particle sedimentation height is recorded as L2. The sedimentation is calculated by the following formula:

[0067]

[0068] According to the device of the utility model, centrifugal force is used to separate the solid and liquid components in the magnetorheological fluid under different magnetic fields, so as to quickly obtain the sedimentation stability data of the magnetorheological fluid under different magnetic fields. Since the device is simple and the cycle is short, it has broad application prospects in the magnetorheological fluid sedimentation stability test.

[0069] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0070] The embodiments of the present invention are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, a person skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A device for testing the sedimentation of magnetorheological fluid, characterized in that: include: The rotating mechanism (1) comprises a rotating drum (11) which is configured as a truncated cone structure and configured to rotate along the axis of the rotating drum (11); wherein the top surface of the rotating drum (11) is provided with an inverted conical cavity; A plurality of tubular members (12) are symmetrically arranged along the axis at one end of the rotating drum (11) close to the cavity, wherein the tube openings of the tubular members (12) are arranged on the conical surface formed by the cavity and communicate with the cavity, and are suitable for containing magnetorheological fluid and centrifugally separating the magnetorheological fluid in response to the rotation of the rotating drum (11); The outer side of the tubular member (12) is wound with a coil (13), which is suitable for generating a magnetic field inside the tubular member (12) in response to the conduction of electric current; as well as The driving mechanism (2) is connected to the rotating mechanism (1) and is suitable for driving the rotating mechanism (1) to rotate.

2. The device according to claim 1, characterized in that The rotating mechanism (1) further comprises a rotating disk (15), wherein the rotating disk (15) is fixedly connected to the bottom surface of the rotating drum (11) so as to rotate simultaneously in response to the rotation of the rotating drum (11).

3. The device according to claim 2, characterized in that The rotating mechanism (1) further comprises a support seat (18), wherein the support seat (18) is mounted on the working surface; The rotating disk (15) is sleeved on the upper part of the supporting seat (18) and is configured to rotate relative to the supporting seat (18).

4. The device according to claim 3, characterized in that A first power source (3) is disposed on the outer wall of the support seat (18), and the first power source (3) is configured to be electrically connected to the coil (13); The first power supply (3) is configured to have adjustable current so as to adjust the intensity of the magnetic field formed by the coil (13).

5. The device according to claim 4, characterized in that A brush slip ring (16) electrically connected to the coil (13) is arranged in the rotating disk (15); A brush (17) corresponding to the brush slip ring (16) is arranged at the junction of the support seat (18) and the rotating disk (15), and is suitable for conducting the brush slip ring (16) with the first power source (3).

6. The device according to claim 2, characterized in that The driving mechanism (2) comprises: A rotating shaft (21), a first end of which is detachably mounted in the rotating drum and is suitable for driving the rotating drum to rotate; a motor (22) rotatably connected to the second end of the rotating shaft (21) and adapted to drive the rotating shaft (21) to rotate; and A second power source (23) is electrically connected to the motor (22) to supply power to the motor (22).

7. The device according to claim 6, characterized in that The first end of the rotating shaft (21) is configured as a T-shaped structure and is embedded in the rotating drum (11) through the cavity so as to be integrally connected to the rotating drum (11).

8. The device according to claim 6, characterized in that It also includes a support frame (4) suitable for supporting the motor (22).

9. The device according to claim 6, characterized in that It also includes a cylinder cover (14), the cylinder cover (14) covers the opening formed in the cavity and is suitable for sealing the cavity; The cylinder cover (14) comprises two semi-annular cover bodies, and the two cover bodies are suitable for being symmetrically arranged on both sides of the rotating shaft (21) so as to cover the opening formed by the cavity in a spliced ​​state.

10. The device according to claim 9, characterized in that The joints of the two covers are connected by magnetic attraction.

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