Electromagnetic driving demonstration device based on liquid metal

Abstract

The utility model discloses an electromagnetic drive demonstration device based on liquid metal, which is characterized in that the device comprises a base, a motor and the liquid metal, the base is composed of a wood board and two cuboid wood blocks, the motor is fixed on the two cuboid wood blocks through a rectangular iron plate, and the motor is fixed on the two cuboid wood blocks through a rectangular iron plate. A rectangular iron sheet is fixed on a rotating shaft of the motor, two permanent magnets are mounted on the rectangular iron sheet, liquid metal is positioned in the liquid metal container, and a motor switch and a motor speed regulation knob are positioned on the wood plate; according to the utility model, the liquid metal is innovatively used for demonstrating the electromagnetic driving phenomenon, students can deeply understand the electromagnetic driving principle, and the device is suitable for teaching and science popularization.

Description

(I) TECHNICAL FIELD

[0001] The utility model relates to a kind of physical experiment demonstration equipment, in particular to a kind of electromagnetic drive demonstration device based on liquid metal. (II) BACKGROUND

[0002] Electromagnetic drive is an important concept in high school physics electromagnetism, its principle involves high school physics important knowledge such as Lenz's law, Ampere force, understanding electromagnetic drive phenomenon helps students better master electromagnetic induction related content, thereby deepening students' understanding of the nature of electromagnetic induction phenomenon.But existing electromagnetic drive demonstration experiment is driven solid metal by changing magnetic field, many students are puzzled by this: electromagnetic drive phenomenon only occurs in regular shape solid metal, in irregular shape metal even liquid metal?At the same time, students may also mistakenly believe that the rotation of conductor is because the air current produced by magnet rotation is "blown".In order to avoid students from entering the wrong thinking, more scientific and reasonable to show the phenomenon of electromagnetic drive experiment, a new electromagnetic drive demonstration device is urgently needed. (III) SUMMARY

[0003] The utility model adopts the technical scheme: a kind of electromagnetic drive demonstration device based on liquid metal, characterized by including base, motor and liquid metal, the base is made of a piece of plank and two pieces of cuboid wood block, motor is fixed on the two pieces of cuboid wood block by a piece of rectangular iron plate, motor rotating shaft is fixed with rectangular iron sheet, two permanent magnets are installed on rectangular iron sheet, liquid metal is located in liquid metal container, motor switch and motor speed knob are located on the plank.

[0004] The electromagnetic drive demonstration device based on liquid metal as described above, wherein the liquid metal container is spliced by two pieces of rectangular acrylic plate and a piece of square acrylic plate with semispherical recess in the center.

[0005] The electromagnetic drive demonstration device based on liquid metal as described above, wherein the liquid metal is located directly above the midpoint of the two permanent magnets after the device is assembled.

[0006] As described above, since the above technical scheme is adopted, the utility model drives liquid metal by adjustable speed motor rotating below liquid metal to demonstrate electromagnetic drive phenomenon.The device is simple in structure, reasonable in design, uses liquid metal as the object of electromagnetic drive, breaks the misunderstanding of students on electromagnetic drive phenomenon, at the same time, separates conductor from changing magnetic field through acrylic base, eliminates the air flow "blowing" factor, so that students can more clearly understand the nature of electromagnetic drive phenomenon. (IV) DESCRIPTION OF DRAWINGS

[0007] Figure 1It is a structure schematic view of a liquid metal-based electromagnetic drive demonstration device.

[0008] Figure 2 It is a front view of a liquid metal-based electromagnetic drive demonstration device.

[0009] 1-liquid metal, 2-liquid metal container, 3-rectangular iron sheet, 4-rectangular iron plate, 5-motor, 6-motor speed knob, 7-permanent magnet,

[0010] 8-base, 9-wood board, 10-cuboid wood block, 11-motor switch, 12-motor speed knob (Five) specific embodiments

[0011] The utility model will be described in detail below in combination with the drawings and specific embodiments, but not as the limitation of the utility model.

[0012] As shown in Figure 1 and Figure 2 , a liquid metal-based electromagnetic drive demonstration device, characterized in that, including base (8), motor (5) and liquid metal (1), the base (8) is by a wood board (9) and two cuboid wood blocks (10) constitute, motor (5) is fixed on the two cuboid wood blocks (10) through a rectangular iron plate (4), motor rotating shaft is fixed with rectangular iron sheet (3), two permanent magnets (7) are installed on rectangular iron sheet (3), liquid metal (1) is located in liquid metal container (2), motor switch (11) and motor speed knob (6) are located on the wood board (9). The liquid metal container (2) is spliced by two rectangular acrylic plates and a square acrylic plate with a semispherical recess in the center. After the device is assembled, the liquid metal (1) is located directly above the midpoint of the line connecting the two permanent magnets (7).

[0013] During the demonstration, turn on the power, open the motor switch 11, and the motor 5 is powered on to start rotating, driving the two permanent magnets 7 fixed on the rectangular iron sheet 3 to rotate, generating a rotating magnetic field in the horizontal plane. The rotating magnetic field generates eddy currents inside the liquid metal 1, which causes the liquid metal to continuously rotate under the action of Ampere force, thereby demonstrating the electromagnetic drive phenomenon. The demonstrator can also adjust the rotation speed of the motor 5 by operating the motor speed knob 12 to explore the qualitative relationship between the rotation speed of the magnetic field and the electromagnetic drive effect.

[0014] The utility model is not limited to the above specific embodiments. The skilled in the art to which the utility model belongs can make various modifications, supplements or use similar ways to replace the described specific embodiments without deviating from the spirit of the utility model or exceeding the scope defined by the attached claims, which are within the scope of protection claimed by the utility model.

Claims

1. A liquid metal based electromagnetic drive demonstration device, characterized by, It comprises a base (8), an electric motor (5) and liquid metal (1), the base (8) is composed of a piece of wood board (9) and two pieces of cuboid wood block (10), the electric motor (5) is fixed on the two pieces of cuboid wood block (10) through a piece of rectangular iron plate (4), the electric motor rotating shaft is fixed with a rectangular iron sheet (3), two pieces of permanent magnet (7) are installed on the rectangular iron sheet (3), the liquid metal (1) is located in the liquid metal container (2), the electric motor switch (11) and the electric motor speed regulating knob (6) are located on the wood board (9).

2. The liquid metal based electromagnetic demonstration device of claim 1, wherein: The liquid metal container (2) is spliced by two pieces of rectangular acrylic plate and a piece of square acrylic plate with a semispherical recess in the center.

3. The liquid metal based electromagnetic demonstration device of claim 1, wherein: After the device is assembled, the liquid metal (1) is located directly above the midpoint of the connecting line of the two pieces of permanent magnet (7).

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