A magnetorheological fluid tensile traction microstructure observation device

Abstract

The invention discloses a magnetorheological fluid tensile and traction microstructure observation device, comprising a slide rail fixed support, a slide rail fixedly connected to the slide rail fixed support, a magnetorheological cavity arranged on the slide rail, a piston pull rod arranged to have relative motion with the magnetorheological cavity, a force displacement sensor fixedly connected to the piston pull rod, a microscope arranged above the magnetorheological cavity, and a tensile and traction drive mechanism connected to the force displacement sensor. The invention has a simple structure and is easy to install and disassemble. It can realize the simultaneous observation of the microstructure evolution and macroscopic tensile mechanical properties of the magnetorheological fluid under the coupling effect of magnetic field and tension. It has good universality for the study of the tensile mechanism of the magnetorheological fluid and is helpful for the precise regulation of the tensile mechanical properties of the magnetorheological device.

Description

Technical Field

[0001] The invention relates to the field of magnetorheological technology, in particular to a magnetorheological fluid tensile traction microstructure observation device. Background Art

[0002] The tensile mechanical properties of magnetorheological fluids are closely related to the evolution of their microstructures. Researchers mainly focus on experimental studies on the macroscopic tensile mechanical properties of magnetorheological fluids, but lack experimental observations of the dynamic evolution of the microstructure of magnetorheological fluids under tensile action. As a result, it is impossible to establish an accurate and intuitive understanding of the relationship between the microstructural evolution and the macroscopic tensile mechanical behavior of magnetorheological fluids under the coupling of magnetic field and tension, which ultimately limits the application and promotion of magnetorheological stretching technology.

[0003] The current microscopic observation device of the rheological properties of magnetorheological fluids can observe the microstructural evolution of magnetorheological fluids under shear. However, the force direction of the microstructural evolution of magnetorheological fluids under shear is perpendicular to that of the microstructural evolution of magnetorheological fluids under tension, which leads to significant differences between the microstructural evolution under shear and the microstructural evolution under tension-shear. As a result, the microstructural evolution of magnetorheological fluids under shear cannot provide a reference for the microstructural evolution of magnetorheological fluids under tension. Currently, there is no magnetorheological fluid stretching observation device that can simultaneously observe the microstructural evolution and macroscopic tensile mechanical properties of magnetorheological fluids under the coupling of magnetic field and tension, which restricts the research on the laws between the microstructural evolution and macroscopic mechanical properties of magnetorheological fluids and limits the application of magnetorheological stretching technology. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetorheological fluid tensile traction microstructure observation device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a magnetorheological fluid tensile and traction microstructure observation device, comprising a slide rail fixed support, a slide rail fixedly connected to the slide rail fixed support, a magnetorheological cavity arranged on the slide rail, a piston pull rod arranged to have relative motion with the magnetorheological cavity, a force displacement sensor fixedly connected to the piston pull rod, a microscope arranged above the magnetorheological cavity, and a tensile and traction drive mechanism connected to the force displacement sensor, an iron core is arranged on one side of the magnetorheological cavity, a coil is wound on the iron core to form an excitation coil, the excitation coil inputs current to generate a magnetic field that enters the magnetorheological fluid in the magnetorheological cavity, and activates the magnetic particles inside the magnetorheological fluid to chain and form a microstructure in the magnetorheological fluid.

[0006] Preferably, a linear bearing is arranged on the other side of the magnetorheological fluid cavity, and the piston pull rod is guided and positioned by the linear bearing. The piston pull rod consists of a piston and a pull rod. The piston is arranged in the magnetorheological fluid cavity, one end of the pull rod is fixedly connected to the piston, and the other end of the pull rod extends from the linear bearing.

[0007] Preferably, the microscope includes a camera, an objective lens and an LED light source. The camera is located at the top of the microscope and is used to photograph the microstructure state in the magnetorheological fluid. The objective lens is located at the bottom of the microscope and is used to observe the microstructure in the magnetorheological fluid. The LED light source is located on the microscope and is used to irradiate the microstructure in the magnetorheological fluid in the magnetorheological cavity.

[0008] Preferably, the stretching and traction drive mechanism consists of an I-shaped guide rail, a slider arranged on the I-shaped guide rail, a connecting block fixedly connected to the slider, a rolling bearing arranged between the I-shaped guide rails, a ball screw shaft arranged on the rolling bearing, a coupling fixedly connected to the ball screw shaft, and a variable speed motor fixedly connected to the coupling. The stretching and traction drive mechanism pulls the movement of the piston pull rod, and the piston on the piston pull rod pulls the microstructure movement of the chained magnetorheological fluid in the stretching magnetorheological cavity.

[0009] Preferably, the stretching and traction driving mechanism can be composed of a T-shaped guide rail fixed support, a T-shaped guide rail arranged on the T-shaped guide rail fixed support, a running wheel arranged on the T-shaped guide rail, a rack connected between the running wheels through a wheel axle, a concave connecting plate I fixedly connected to one end of the rack, a gear meshing with the rack, a coupling for driving the gear to rotate, a speed motor for driving the coupling to rotate, and a speed motor fixed support arranged below the speed motor.

[0010] Preferably, the stretching and traction driving mechanism can be composed of a variable speed motor fixed support, a variable speed motor, a coupling, a rotating disk, a crank, a connecting rod, a connecting shaft and a concave connecting plate II. The variable speed motor is arranged on the variable speed motor fixed support, one side of the coupling is fixedly connected to the variable speed motor, and the other side of the coupling is fixedly connected to the rotating disk, one end of the crank is connected to the rotating disk, the other end of the crank is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the connecting shaft, the connecting shaft is arranged on the concave connecting plate II, and the crank and the coupling are respectively located on both sides of the rotating disk.

[0011] Preferably, the magnetorheological fluid is magnetorheological fluid, magnetorheological grease or magnetorheological glue.

[0012] Preferably, the magnetorheological cavity is made of transparent organic glass.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. A magnetorheological fluid tensile traction microstructure observation device of the technical solution can simultaneously observe the microstructure evolution and macroscopic tensile mechanical properties of the magnetorheological fluid under the coupling of magnetic field and tension, which is helpful for the study of tensile mechanical mechanism and precise control of mechanical properties of magnetorheological devices;

[0015] 2. The structure is compact and simple, easy to assemble and disassemble, and easy to promote. Most of the parts are standard parts and can be purchased directly on the market without additional processing, which reduces the manufacturing cost;

[0016] 3. Ability to observe the microstructure evolution and macroscopic mechanical properties of magnetorheological fluids under different magnetic fields and different tensile pulling speeds;

[0017] 4. It is very applicable to the tensile observation of different types of magnetorheological fluids, and can observe the tensile traction microstructure evolution and macroscopic tensile mechanical properties of magnetorheological fluids such as magnetorheological fluids, magnetorheological glues, and magnetorheological greases. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a magnetorheological fluid tensile traction microstructure observation device driven by a ball screw.

[0019] Figure 2 This is an enlarged schematic diagram of the tensile traction drive mechanism driven by a ball screw.

[0020] Figure 3 Schematic diagram of the cross section of the magnetorheological cavity.

[0021] Figure 4 Schematic diagram of a magnetorheological fluid tensile traction microstructure observation device driven by a gear rack.

[0022] Figure 5 This is an enlarged schematic diagram of the tensile traction drive mechanism driven by a rack and pinion.

[0023] Figure 6 Schematic diagram of a magnetorheological fluid tensile traction microstructure observation device driven by a crank-connecting rod.

[0024] Figure 7 This is an enlarged schematic diagram of the crank-connecting rod driven tensile traction drive mechanism.

[0025] In the accompanying drawings: 1, slide rail fixed support; 2, slide rail; 3, magnetorheological cavity; 4, microscope; 5, piston rod; 6, force displacement sensor; 7, stretching traction drive mechanism; 301, coil; 302, iron core; 303, microstructure in magnetorheological fluid; 304, linear bearing; 401, camera; 402, objective lens; 403, LED light source; 501, piston; 502, rod; 701, I-shaped guide rail; 702, slider; 703, connecting block; 704, ball screw shaft; 705, rolling bearing; 706, coupling; 707, variable speed motor; 708, concave connecting plate I; 709, T-shaped guide rail; 710, rack; 711, walking wheel; 712, axle; 713, gear; 714, T-shaped guide rail fixed support; 715, variable speed motor fixed support; 716, concave connecting plate II; 717, connecting shaft; 718, connecting rod; 719, crank; 720, rotating disk. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0027] Embodiment 1:

[0028] like Figures 1 to 3 As shown, a magnetorheological fluid tensile traction microstructure observation device includes a slide rail fixed support 1, a slide rail 2 fixedly connected to the slide rail fixed support, a magnetorheological cavity 3 arranged on the slide rail 2, a piston pull rod 5 arranged to have relative motion with the magnetorheological cavity 3, a force displacement sensor 6 fixedly connected to the piston pull rod 5, a microscope 4 arranged above the magnetorheological cavity 3, and a tensile traction drive mechanism 7 connected to the force displacement sensor 6, an iron core 302 is arranged on one side of the magnetorheological cavity 3, a coil 301 is wound around the iron core 302 to form an excitation coil, and the excitation coil inputs current to generate a magnetic field that enters the magnetorheological fluid in the magnetorheological cavity 3, activates the magnetic particles inside the magnetorheological fluid to chain and form a microstructure 303 in the magnetorheological fluid.

[0029] In this embodiment, a linear bearing 304 is arranged on the other side of the magnetorheological chamber 3, and the piston pull rod 5 is guided and positioned by the linear bearing 304. The piston pull rod 5 consists of a piston 501 and a pull rod 502. The piston 501 is arranged in the magnetorheological chamber 3, one end of the pull rod 502 is fixedly connected to the piston 501, and the other end of the pull rod 502 extends from the linear bearing 304.

[0030] In this embodiment, the stretching and traction drive mechanism 7 is composed of an I-shaped guide rail 701, a slider 702 arranged on the I-shaped guide rail 701, a connecting block 703 fixedly connected to the slider 702, a rolling bearing 705 arranged between the I-shaped guide rails 701, a ball screw shaft 704 arranged on the rolling bearing 705, a coupling 706 fixedly connected to the ball screw shaft 704, and a variable speed motor 707 fixedly connected to the coupling 706. In this embodiment, the stretching and traction driving mechanism 7 drives the slider 702 to translate by the ball screw shaft 704, and the slider 702 drives the connecting block 703 to translate. The connecting block 703 pulls the force displacement sensor 6 to move axially together with the piston rod 5. The piston 501 on the piston rod 5 pulls the microstructure 303 in the chained magnetorheological fluid in the magnetorheological cavity 3 to move. The LED light source 403 irradiates the microstructure 303 in the magnetorheological fluid in the magnetorheological cavity 3. The objective lens 402 observes the microstructure 303 in the magnetorheological fluid. The state of the microstructure 303 in the magnetorheological fluid is photographed by the camera 401 set on the microscope 4. At the same time, the microstructure 303 in the magnetorheological fluid applies tension to the force displacement sensor 6 during the stretching process, and the force value data obtained by the force displacement sensor 6 is stored in the computer storage disk, thereby realizing the simultaneous observation of the microstructure evolution and macroscopic tensile mechanical properties of the magnetorheological fluid in the magnetic field and stretching coupling.

[0031] Embodiment 2:

[0032] like Figures 3 to 5 As shown, unlike the stretching and traction driving mechanism driven by the ball screw in Example 1, the stretching and traction driving mechanism 7 of this embodiment is driven by a gear rack. The stretching and traction driving mechanism 7 of this embodiment consists of a T-shaped guide rail fixed support 714, a T-shaped guide rail 709 arranged on the T-shaped guide rail fixed support 714, a running wheel 711 arranged on the T-shaped guide rail 709, a rack 710 connected between the running wheels 711 through a wheel axle 712, a concave connecting plate I 708 fixedly connected to one end of the rack 710, a gear 713 meshing with the rack 710, a coupling 706 for driving the gear 713 to rotate, a speed motor 707 for driving the coupling 706 to rotate, and a speed motor fixed support 715 arranged below the speed motor 707.

[0033] In this embodiment, the variable speed motor 707 drives the coupling 706 to rotate, the rotation of the coupling 706 drives the gear 713 to rotate, and the rotation of the gear 713 drives the rack 710 to translate. At the same time, the rack 710 can achieve stable translation as the walking wheel 711 rotates. The translation of the rack 710 drives the concave connecting plate Ⅰ708, and the concave connecting plate Ⅰ708 traction force displacement sensor 6 moves axially together with the piston pull rod 5. The piston 501 on the piston pull rod 5 pulls and stretches the microstructure 303 in the chained magnetorheological fluid in the magnetorheological cavity 3 to move.

[0034] Embodiment 3:

[0035] like Figure 3 , Figure 6 and Figure 7 As shown, different from the stretching and traction driving mechanism driven by the ball screw and the stretching and traction driving mechanism driven by the gear rack in Example 1, the stretching and traction driving mechanism 7 of this embodiment is driven by a crank connecting rod. The stretching and traction driving mechanism 7 of this embodiment can be composed of a variable speed motor fixed support 715, a variable speed motor 707, a coupling 706, a rotating disk 720, a crank 719, a connecting rod 718, a connecting shaft 717 and a concave connecting plate II 716.

[0036] In this embodiment, the variable speed motor 707 is arranged on the variable speed motor fixed support 715, one side of the coupling 706 is fixedly connected to the variable speed motor 707, the other side of the coupling 706 is fixedly connected to the rotating disk 720, one end of the crank 719 is connected to the rotating disk 720, the other end of the crank 719 is connected to one end of the connecting rod 718, the other end of the connecting rod 718 is connected to the connecting shaft 717, the connecting shaft 717 is arranged on the concave connecting plate II 716, and the crank 719 and the coupling 706 are respectively located on both sides of the rotating disk 720.

[0037] In this embodiment, the variable speed motor 707 drives the coupling 706 to rotate, the rotation of the coupling 706 drives the rotation of the rotating disk 720, the rotation of the rotating disk 720 drives the swing of the crank 719, the swing of the crank 719 drives the movement of the connecting rod 718, the movement of the connecting rod 718 drives the translation of the concave connecting plate II 716, the concave connecting plate II 716 traction force displacement sensor 6 moves axially together with the piston pull rod 5, and the piston 501 on the piston pull rod 5 pulls and stretches the microstructure 303 in the chained magnetorheological fluid in the magnetorheological cavity 3 to move.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A magnetorheological fluid tensile traction microstructure observation device, characterized in that: The invention comprises a slide rail fixing support (1), a slide rail (2) fixedly connected to the slide rail fixing support (1), a magnetorheological chamber (3) arranged on the slide rail (2), a piston pull rod (5) arranged to move relative to the magnetorheological chamber (3), a force displacement sensor (6) fixedly connected to the piston pull rod (5), a microscope (4) arranged above the magnetorheological chamber (3), and a stretching and traction driving mechanism (7) connected to the force displacement sensor (6); an iron core (302) is arranged on one side of the magnetorheological chamber (3), a coil (301) is wound around the iron core (302) to form an excitation coil, and an input current to the excitation coil generates The magnetic field enters the magnetorheological fluid in the magnetorheological cavity (3), activating the magnetic particles in the magnetorheological fluid to form a chain and form a microstructure (303) in the magnetorheological fluid; a linear bearing (304) is arranged on the other side of the magnetorheological cavity (3); the piston pull rod (5) is guided and positioned by the linear bearing (304); the piston pull rod (5) is composed of a piston (501) and a pull rod (502); the piston (501) is arranged in the magnetorheological cavity (3); one end of the pull rod (502) is fixedly connected to the piston (501); the other end of the pull rod (502) extends from the linear bearing (304); the microscope (4) The invention comprises a camera (401), an objective lens (402) and an LED light source (403); the camera (401) is located at the top of a microscope (4) and is used to photograph the state of a microstructure (303) in a magnetorheological fluid; the objective lens (402) is located at the bottom of the microscope (4) and is used to observe the microstructure (303) in the magnetorheological fluid; the LED light source (403) is located on the microscope (4) and is used to illuminate the microstructure (303) in the magnetorheological fluid in a magnetorheological cavity (3); the stretching and traction driving mechanism (7) comprises an I-shaped guide rail (701) and a guide disposed on the I-shaped guide rail (701); The invention comprises a slider (702), a connecting block (703) fixedly connected to the slider (702), a rolling bearing (705) arranged between the I-shaped guide rails (701), a ball screw shaft (704) arranged on the rolling bearing (705), a coupling (706) fixedly connected to the ball screw shaft (704), and a variable speed motor (707) fixedly connected to the coupling (706); the stretching traction drive mechanism (7) tractions the movement of the piston pull rod (5), and the piston (501) on the piston pull rod (5) tractions the movement of the microstructure (303) in the chained magnetorheological fluid in the stretching magnetorheological cavity (3).

2. A magnetorheological fluid tensile traction microstructure observation device, characterized in that: The invention comprises a slide rail fixed support (1), a slide rail (2) fixedly connected to the slide rail fixed support (1), a magnetorheological chamber (3) arranged on the slide rail (2), a piston pull rod (5) arranged to move relative to the magnetorheological chamber (3), a force displacement sensor (6) fixedly connected to the piston pull rod (5), a microscope (4) arranged above the magnetorheological chamber (3), and a stretching and traction driving mechanism (7) connected to the force displacement sensor (6); an iron core (302) is arranged on one side of the magnetorheological chamber (3), a coil (301) is wound around the iron core (302) to form an excitation coil, and the excitation coil input The electric current generates a magnetic field which enters the magnetorheological fluid in the magnetorheological cavity (3), activating the magnetic particles in the magnetorheological fluid to form a chain and form a microstructure (303) in the magnetorheological fluid; a linear bearing (304) is arranged on the other side of the magnetorheological cavity (3); the piston pull rod (5) is guided and positioned by the linear bearing (304); the piston pull rod (5) is composed of a piston (501) and a pull rod (502); the piston (501) is arranged in the magnetorheological cavity (3); one end of the pull rod (502) is fixedly connected to the piston (501); the other end of the pull rod (502) extends from the linear bearing (304); The microscope (4) comprises a camera (401), an objective lens (402) and an LED light source (403); the camera (401) is located at the top of the microscope (4) and is used to photograph the state of the microstructure (303) in the magnetorheological fluid; the objective lens (402) is located at the bottom of the microscope (4) and is used to observe the microstructure (303) in the magnetorheological fluid; the LED light source (403) is located on the microscope (4) and is used to illuminate the microstructure (303) in the magnetorheological fluid in the magnetorheological cavity (3); the stretching and traction driving mechanism (7) can be fixed by a T-shaped guide rail support (714 ), a T-shaped guide rail (709) arranged on a T-shaped guide rail fixing support (714), a running wheel (711) arranged on the T-shaped guide rail (709), a rack (710) connected between the running wheels (711) via a wheel axle (712), a concave connecting plate I (708) fixedly connected to one end of the rack (710), a gear (713) meshing with the rack (710), a coupling (706) driving the gear (713) to rotate, a variable speed motor (707) driving the coupling (706) to rotate, and a variable speed motor fixing support (715) arranged below the variable speed motor (707).

3. A magnetorheological fluid tensile traction microstructure observation device, characterized in that: The invention comprises a slide rail fixed support (1), a slide rail (2) fixedly connected to the slide rail fixed support (1), a magnetorheological chamber (3) arranged on the slide rail (2), a piston pull rod (5) arranged to move relative to the magnetorheological chamber (3), a force displacement sensor (6) fixedly connected to the piston pull rod (5), a microscope (4) arranged above the magnetorheological chamber (3), and a stretching and traction driving mechanism (7) connected to the force displacement sensor (6); an iron core (302) is arranged on one side of the magnetorheological chamber (3), a coil (301) is wound around the iron core (302) to form an excitation coil, and the excitation coil inputs a current to generate a magnetic field entering the magnetic field in the magnetorheological chamber (3). Rheological fluid, activating the magnetic particles inside the magnetorheological fluid to chain and form a microstructure (303) inside the magnetorheological fluid; a linear bearing (304) is arranged on the other side of the magnetorheological cavity (3); the piston pull rod (5) is guided and positioned by the linear bearing (304); the piston pull rod (5) is composed of a piston (501) and a pull rod (502); the piston (501) is arranged in the magnetorheological cavity (3); one end of the pull rod (502) is fixedly connected to the piston (501); the other end of the pull rod (502) extends from the linear bearing (304); the microscope (4) comprises a camera (401), an objective lens (402) and an LED light source (403); The camera (401) is located at the top of the microscope (4) and is used to photograph the state of the microstructure (303) in the magnetorheological fluid; the objective lens (402) is located at the bottom of the microscope (4) and is used to observe the microstructure (303) in the magnetorheological fluid; the LED light source (403) is located on the microscope (4) and is used to illuminate the microstructure (303) in the magnetorheological fluid in the magnetorheological cavity (3); the stretching and traction driving mechanism (7) can be composed of a variable speed motor fixed support (715), a variable speed motor (707), a coupling (706), a rotating disk (720), a crank (719), a connecting rod (718), a connecting shaft (717), and a concave The variable speed motor (707) is arranged on a variable speed motor fixed support (715); one side of the coupling (706) is fixedly connected to the variable speed motor (707); the other side of the coupling (706) is fixedly connected to a rotating disk (720); one end of the crank (719) is connected to the rotating disk (720); the other end of the crank (719) is connected to one end of a connecting rod (718); the other end of the connecting rod (718) is connected to a connecting shaft (717); the connecting shaft (717) is arranged on the concave U-shaped connecting plate II (716); the crank (719) and the coupling (706) are respectively located on both sides of the rotating disk (720).

4. The magnetorheological fluid tensile traction microstructure observation device according to claim 1, characterized in that: The magnetorheological fluid is magnetorheological liquid, magnetorheological grease or magnetorheological glue.

5. The magnetorheological fluid tensile traction microstructure observation device according to claim 1, characterized in that: The magnetorheological cavity (3) is made of organic transparent glass.

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