阅读说明：本技术 一种基于液态金属驱动的旋转电机 (Rotating motor based on liquid metal drive ) 是由 张世武 王二龙 舒健 金虎 于 2020-04-08 设计创作，主要内容包括：本发明公开一种基于液态金属驱动的旋转电机,包括定子模块、转子模块、供电模块、轴承,其中定子模块由上电机框架、下电机框架,环形水槽构成。上电机框架和下电机框架为液态金属驱动的旋转电机提供结构支撑；环形水槽的外圈水槽内装有电解质溶液为转子模块中的液态金属液滴提供溶液环境。转子模块由电机转轴、转子框架、石墨电极、液态金属液滴组成。转子框架上的液态金属存储腔内的液态金属液滴在石墨电极提供的驱动电场作用下向高电势方向移动,推动电机转轴转动。供电模块为嵌入在电机内部的双通路液态金属导电滑环,实现电机的外部供电。本发明中的液态金属驱动的旋转电机是一种新型高效低成本的扭矩输出设备,具有广泛的适用性与通用性,尤其在转子堵转的情况下不会出现转子线圈过热而烧毁电机。(The invention discloses a rotating motor based on liquid metal driving, which comprises a stator module, a rotor module, a power supply module and a bearing, wherein the stator module consists of an upper motor frame, a lower motor frame and an annular water tank. The upper motor frame and the lower motor frame provide structural support for a liquid metal driven rotating motor; an electrolyte solution is filled in an outer ring water tank of the annular water tank to provide a solution environment for liquid metal droplets in the rotor module. The rotor module consists of a motor rotating shaft, a rotor frame, a graphite electrode and liquid metal liquid drops. Liquid metal liquid drops in a liquid metal storage cavity on the rotor frame move towards the direction of high potential under the action of a driving electric field provided by the graphite electrode, and a rotating shaft of the motor is pushed to rotate. The power supply module is a double-channel liquid metal conductive slip ring embedded in the motor, so that external power supply of the motor is realized. The liquid metal driven rotating motor is novel high-efficiency low-cost torque output equipment, has wide applicability and universality, and particularly can not burn out the motor due to overheating of a rotor coil under the condition of rotor stalling.)

1. A rotating electrical machine based on liquid metal drive, comprising: the device comprises a stator module, a rotor module and a power supply module; the stator module comprises an upper motor frame, a lower motor frame and an annular water tank; the rotor module comprises a rotor frame, a graphite electrode and a motor rotating shaft, the rotor frame is fixed on the motor rotating shaft, the rotor module is integrally installed in the stator module through a ball bearing, and the rotor module freely rotates relative to the stator module; the power supply module is a double-channel liquid metal conductive slip ring embedded in the rotating motor, the liquid metal conductive slip ring is divided into an upper layer conductive slip ring and a lower layer conductive slip ring, and the upper layer conductive slip ring is composed of an upper layer conductive slip ring stator, an upper layer conductive slip ring stator electrode, liquid metal in the upper layer conductive slip ring, an upper layer conductive slip ring rotor electrode and an annular water tank above the center of the rotor frame; the lower conductive slip ring consists of a tubular boss below the center of the rotor frame, a lower conductive slip ring rotor electrode, liquid metal in the lower conductive slip ring, a lower conductive slip ring stator electrode and an inner ring water tank of the annular water tank; the annular water tank is fixed in the lower motor frame, and electrolyte solution is filled in the water tank on the outer ring of the annular water tank to provide a solution environment for liquid drop driving of liquid metal in the liquid metal storage cavity; the rotor frame is a moving unit, a plurality of liquid metal storage cavities immersed in the outer ring water tank of the annular water tank are formed in the rotor frame, and liquid drops of liquid metal in the liquid metal storage cavities push the rotor frame to rotate under the action of an electric field; the outer surface of each liquid metal storage cavity is respectively provided with two graphite electrodes, the graphite electrodes on each liquid metal storage cavity are arranged along the rotating direction of the rotor frame, an external direct-current power supply is connected to the graphite electrodes through a liquid metal conductive slip ring, an independent driving electric field is provided for the liquid metal in the liquid metal storage cavity, and the rotating motor driven by the liquid metal is driven to rotate continuously.

2. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the upper motor frame in the stator module is a circular ring structure with a cross frame inside, the lower motor frame is a barrel-shaped frame with the cross frame at the bottom, and the upper motor frame and the lower motor frame jointly form a cylindrical frame of the liquid metal driven rotating motor and provide structural support for the rotor frame to output rotating motion.

3. A liquid metal drive-based rotating electrical machine according to claim 1 or 2, wherein: the upper motor frame and the lower motor frame are made of light materials, the light materials are aluminum alloy and photosensitive resin, sufficient structural strength is provided, and the self weight of the motor is reduced; the materials and the size of the upper motor frame and the lower motor frame are adjusted according to the working requirements, and if the light-weight and compact working requirements are required, the upper motor frame and the lower motor frame adopt lighter photosensitive resin, and the sizes of the upper motor frame and the lower motor frame are correspondingly reduced.

4. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the annular water tank is processed by 3D printing of photosensitive resin, and meets the requirements of insulation and light weight, and comprises two annular water tanks and an inner hole, wherein the two annular water tanks are respectively an outer ring water tank of the annular water tank and an inner ring water tank of the annular water tank; the outer ring water tank of the annular water tank is used for loading electrolyte solution to provide a solution environment for liquid metal droplet driving; and a lower-layer conductive slip ring stator electrode is fixed at the bottom of the inner ring water tank of the annular water tank, is of an annular structure made of a metal copper sheet, and is filled with electrolyte solution and liquid metal.

5. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the upper conductive slip ring stator is of a tubular structure which is processed by 3D printing of photosensitive resin, the upper conductive slip ring stator is fixed at the circle center of the upper motor frame, an upper conductive slip ring stator electrode is fixed at the bottom of the upper conductive slip ring stator, and the upper conductive slip ring stator electrode is of an annular structure made of a metal copper sheet.

6. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the rotor frame is of a disc structure with a plurality of liquid metal storage cavities immersed in an outer ring water tank of an annular water tank, the rotor frame is uniformly divided into a plurality of disc structures along the circumference, the liquid metal storage cavities are immersed in the outer ring water tank of the annular water tank, an annular water tank is arranged above the center of the rotor frame, a tubular boss is arranged below the center of the rotor frame, a gap is reserved at the top of each liquid metal storage cavity and used for adjusting the pressure inside and outside a cavity of the liquid metal storage cavity, two graphite electrodes are respectively carried on the outer surface of each liquid metal storage cavity, and the graphite electrodes on each liquid metal storage cavity are arranged along the rotation direction of the rotor frame to provide independent driving electric fields for the liquid metal in the; an upper-layer conductive slip ring rotor electrode is fixed at the bottom of the circular water tank above the circle center of the rotor frame, the upper-layer conductive slip ring rotor electrode is of an annular structure made of a metal copper sheet, and liquid metal and electrolyte solution are injected into the circular water tank of the rotor frame; and a lower conductive slip ring rotor electrode is fixed at the bottom of the tubular boss of the rotor frame and is of an annular structure made of a metal copper sheet.

7. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the upper conductive slip is composed of an upper conductive slip ring stator, an upper conductive slip ring stator electrode, an annular water tank above the circle center of the rotor frame, an upper conductive slip ring rotor electrode, liquid metal in the upper conductive slip ring and electrolyte solution; a gap is reserved at the bottom of the circular water tank above the circle center of the rotor frame and the upper conductive slip ring stator, so that the upper conductive slip ring stator and the rotor frame rotate relatively, and liquid metal in the upper conductive slip ring is arranged between the upper conductive slip ring stator electrode and the upper conductive slip ring rotor electrode; because the liquid metal has the fluid property of liquid and the good conductivity of the metal material, the relative rotation of the upper layer conductive slip ring stator and the rotor frame is realized, and the circuit communication between the upper layer conductive slip ring stator electrode and the upper layer conductive slip ring rotor electrode is also ensured.

8. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the lower conductive slip is composed of an inner ring water tank of the annular water tank, a lower conductive slip ring stator electrode, a tubular boss below the center of a circle of the rotor frame, a lower conductive slip ring rotor electrode, liquid metal in the lower conductive slip ring and electrolyte solution; a gap is reserved between the tubular boss below the circle center of the rotor frame and the bottom of the inner ring water tank of the annular water tank, so that the annular water tank and the rotor frame rotate relatively, and liquid metal in the lower conductive slip ring is stored between the lower conductive slip ring stator electrode and the lower conductive slip ring rotor electrode; since the liquid metal has the fluid properties of a liquid and good electrical conductivity (conductivity 3.4 x 10) of the metal material⁷S.m^-1) The annular water tank and the rotor frame rotate relatively, and circuit communication between the lower conductive slip ring stator electrode and the lower conductive slip ring rotor electrode is guaranteed.

9. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: two graphite electrodes on each liquid metal storage cavity on the rotor frame are respectively connected with an upper conductive slip ring rotor electrode and a lower conductive slip ring rotor electrode through copper wires, and the graphite electrodes connected with the upper conductive slip ring rotor electrode and the graphite electrodes connected with the lower conductive slip ring rotor electrode are distributed at intervals; and the stator electrode of the upper conductive slip ring and the stator electrode of the lower conductive slip ring are respectively connected with an external direct current power supply, so that continuous power supply of the rotating motor driven by the liquid metal is realized.

10. A liquid metal drive-based rotating electrical machine according to claim 1, wherein: the surfaces of the upper conductive slip ring stator electrode, the upper conductive slip ring rotor electrode, the lower conductive slip ring stator electrode and the lower conductive slip ring rotor electrode need to be subjected to electrowetting treatment, so that liquid metal is adhered to the surfaces, and the conductive reliability of the upper conductive slip ring and the lower conductive slip ring is improved.

Technical Field

The invention belongs to the technical field of electromechanical equipment, and relates to continuous torque output equipment, in particular to a rotating motor based on liquid metal driving, which can continuously convert electric energy into rotating mechanical energy.

Background

The motor is the core of electromechanical equipment and has wide application in social development. At present, the most extensive electric driving mode is electromagnetic driving, and the principle that a general lead is stressed in a magnetic field is utilized to convert electric energy into mechanical energy. However, the electromagnetic motor requires a complicated current commutation mechanism or a circuit control system, and when the rotor frame is locked, the motor is overheated and even burnt. In addition, in the traditional motor, the electrostatic motor is a motor which realizes the rotation of a rotor through coulomb force between charges, has the characteristics of simple structure and high no-load rotating speed, and has wide application in a micro electro mechanical system. However, the application and development of the electrostatic motor are greatly limited due to the defects of small output power, difficult starting, high power supply voltage and the like of the electrostatic motor.

Electro-active materials as smart materials offer new options for the development of electrical drives, such as piezoelectric motors, shape memory alloy motors, electroactive polymers. The piezoelectric motor converts electric energy into mechanical energy by using a reverse piezoelectric principle, and has been successfully applied in the fields of digital cameras, medical equipment and the like at present. But the efficiency is low, the output torque is limited by the structure, and the service life is short. The shape memory alloy motor converts the linear deformation of the shape memory alloy into the rotation of the rotor through a certain structure. The SMA motors have the disadvantage of too low a rotational speed, which is influenced by the heat transfer efficiency of the shape memory alloy. The electroactive polymer motor is a motor which converts electric energy into mechanical energy by utilizing the characteristic that an electroactive polymer contracts or expands under electric stimulation. But the polymer has the disadvantages of short service life and excessively high driving voltage.

Therefore, the development of a motor which has the advantages of simple structure, light weight, wide applicability, high driving efficiency and difficult damage is increasingly important. And the liquid metal electric field drive which appears recently provides a new idea for the research and development of novel motors.

Disclosure of Invention

The technical problem of the invention is solved: the defects of the prior art are overcome, the rotating motor based on liquid metal driving is provided, the structure is simple and light, the universality is strong, the efficiency is high, the motor can not be overheated and burnt down due to rotor blocking, a brand new thought is provided for designing novel motor equipment, and the rotating motor has important significance for the application research of liquid metal.

The purpose of the invention is realized by the following technical scheme:

a liquid metal drive based rotating electrical machine comprising: the device comprises a stator module, a rotor module and a power supply module; the stator module comprises an upper motor frame, a lower motor frame and an annular water tank; the rotor module comprises a rotor frame, a graphite electrode and a motor rotating shaft, the rotor frame is fixed on the motor rotating shaft, the rotor module is integrally installed in the stator module through a ball bearing, and the rotor module freely rotates relative to the stator module; the power supply module is a double-channel liquid metal conductive slip ring embedded in the rotating motor, the liquid metal conductive slip ring is divided into an upper layer conductive slip ring and a lower layer conductive slip ring, and the upper layer conductive slip ring is composed of an upper layer conductive slip ring stator, an upper layer conductive slip ring stator electrode, liquid metal in the upper layer conductive slip ring, an upper layer conductive slip ring rotor electrode and an annular water tank above the center of the rotor frame; the lower conductive slip ring consists of a tubular boss below the center of the rotor frame, a lower conductive slip ring rotor electrode, liquid metal in the lower conductive slip ring, a lower conductive slip ring stator electrode and an inner ring water tank of the annular water tank; the annular water tank is fixed in the lower motor frame, and electrolyte solution is filled in the water tank on the outer ring of the annular water tank to provide a solution environment for liquid drop driving of liquid metal in the liquid metal storage cavity; the rotor frame is a moving unit, a plurality of liquid metal storage cavities immersed in the outer ring water tank of the annular water tank are formed in the rotor frame, and liquid drops of liquid metal in the liquid metal storage cavities push the rotor frame to rotate under the action of an electric field; the outer surface of each liquid metal storage cavity is respectively provided with two graphite electrodes, the graphite electrodes on each liquid metal storage cavity are arranged along the rotating direction of the rotor frame, an external direct-current power supply is connected to the graphite electrodes through a liquid metal conductive slip ring, an independent driving electric field is provided for the liquid metal in the liquid metal storage cavity, and the rotating motor driven by the liquid metal is driven to rotate continuously.

The upper motor frame in the stator module is a circular ring structure with a cross frame inside, the lower motor frame is a barrel-shaped frame with the cross frame at the bottom, and the upper motor frame and the lower motor frame jointly form a cylindrical frame of the liquid metal driven rotating motor and provide structural support for the rotor frame to output rotating motion.

The upper motor frame and the lower motor frame are made of light materials, the light materials are aluminum alloy and photosensitive resin, sufficient structural strength is provided, and the self weight of the motor is reduced; the materials and the size of the upper motor frame and the lower motor frame are adjusted according to the working requirements, and if the light-weight and compact working requirements are required, the upper motor frame and the lower motor frame adopt lighter photosensitive resin, and the sizes of the upper motor frame and the lower motor frame are correspondingly reduced.

The annular water tank is processed by 3D printing of photosensitive resin, and meets the requirements of insulation and light weight, and comprises two annular water tanks and an inner hole, wherein the two annular water tanks are respectively an outer ring water tank of the annular water tank and an inner ring water tank of the annular water tank; the outer ring water tank of the annular water tank is used for loading electrolyte solution to provide a solution environment for liquid metal droplet driving; and a lower-layer conductive slip ring stator electrode is fixed at the bottom of the inner ring water tank of the annular water tank, is of an annular structure made of a metal copper sheet, and is filled with electrolyte solution and liquid metal.

The upper conductive slip ring stator is of a tubular structure which is processed by 3D printing of photosensitive resin, the upper conductive slip ring stator is fixed at the circle center of the upper motor frame, an upper conductive slip ring stator electrode is fixed at the bottom of the upper conductive slip ring stator, and the upper conductive slip ring stator electrode is of an annular structure made of a metal copper sheet.

The rotor frame is of a disc structure with a plurality of liquid metal storage cavities immersed in an outer ring water tank of an annular water tank, the rotor frame is uniformly divided into a plurality of disc structures along the circumference, the liquid metal storage cavities are immersed in the outer ring water tank of the annular water tank, an annular water tank is arranged above the center of the rotor frame, a tubular boss is arranged below the center of the rotor frame, a gap is reserved at the top of each liquid metal storage cavity and used for adjusting the pressure inside and outside a cavity of the liquid metal storage cavity, two graphite electrodes are respectively carried on the outer surface of each liquid metal storage cavity, and the graphite electrodes on each liquid metal storage cavity are arranged along the rotation direction of the rotor frame to provide independent driving electric fields for the liquid metal in the; an upper layer conductive slip ring rotor electrode is fixed at the bottom of the circular water tank above the circle center of the rotor frame, the upper layer conductive slip ring rotor electrode is of an annular structure made of a metal copper sheet, and liquid metal and electrolyte solution are injected into the circular water tank above the circle center of the rotor frame; the lower conductive slip ring rotor electrode is fixed at the bottom of the tubular boss and is of an annular structure made of a metal copper sheet.

The upper conductive slip is composed of an upper conductive slip ring stator, an upper conductive slip ring stator electrode, an annular water tank above the circle center of the rotor frame, an upper conductive slip ring rotor electrode, liquid metal in the upper conductive slip ring and electrolyte solution; a gap is reserved at the bottom of the circular water tank above the circle center of the rotor frame and the upper conductive slip ring stator, so that the upper conductive slip ring stator and the rotor frame rotate relatively, and liquid metal in the upper conductive slip ring is arranged between the upper conductive slip ring stator electrode and the upper conductive slip ring rotor electrode; because the liquid metal has the fluid property of liquid and the good conductivity of the metal material, the relative rotation of the upper layer conductive slip ring stator and the rotor frame is realized, and the circuit communication between the upper layer conductive slip ring stator electrode and the upper layer conductive slip ring rotor electrode is also ensured.

The lower conductive slip is composed of an inner ring water tank of the annular water tank, a lower conductive slip ring stator electrode, a tubular boss below the center of a circle of the rotor frame, a lower conductive slip ring rotor electrode, liquid metal in the lower conductive slip ring and electrolyte solution; a gap is reserved between the tubular boss below the circle center of the rotor frame and the bottom of the inner ring water tank of the annular water tank, so that the annular water tank and the rotor frame rotate relatively, and liquid metal in the lower conductive slip ring is stored between the lower conductive slip ring stator electrode and the lower conductive slip ring rotor electrode; since the liquid metal has the fluid properties of a liquid and good electrical conductivity (conductivity 3.4 x 10) of the metal material⁷S.m^-1) Not only realizes the relative rotation of the annular water tank and the rotor frame, but also ensures the lower layer conductive slip ring stator electrode andand the circuits between the rotor electrodes of the lower conductive slip ring are communicated.

Two graphite electrodes on each liquid metal storage cavity on the rotor frame are respectively connected with an upper conductive slip ring rotor electrode and a lower conductive slip ring rotor electrode through copper wires, and the graphite electrodes connected with the upper conductive slip ring rotor electrode and the graphite electrodes connected with the lower conductive slip ring rotor electrode are distributed at intervals; and the stator electrode of the upper conductive slip ring and the stator electrode of the lower conductive slip ring are respectively connected with an external direct current power supply, so that continuous power supply of the rotating motor driven by the liquid metal is realized.

The surfaces of the upper conductive slip ring stator electrode, the upper conductive slip ring rotor electrode, the lower conductive slip ring stator electrode and the lower conductive slip ring rotor electrode need to be subjected to electrowetting treatment, so that liquid metal is adhered to the surfaces, and the conductive reliability of the upper conductive slip ring and the lower conductive slip ring is improved.

The invention has the advantages and positive effects that:

(1) the invention adopts liquid metal to drive, has protective effect on the rotor frame, and avoids the problem that the electromagnetic coil of the electromagnetic motor is burnt when the electrode rotor of the common electromagnetic motor is blocked.

(2) The invention designs the conductive slip ring by utilizing the liquid metal, realizes the continuous power supply of the external rotor frame, and has the characteristics of simple structure, reliable conduction and small resistance.

(3) The invention is provided with the annular water tank, so that the application scene of the liquid metal driving is further expanded, and an important idea is provided for the application of the liquid metal driving equipment to the non-solution environment.

(4) The invention utilizes the liquid metal driving principle and the embedded design of the conductive slip ring to ensure that the structure and the assembly of the motor are simpler and more convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of a liquid metal drive-based rotating electrical machine according to the present invention;

FIG. 2 is an exploded view of the structure of a liquid metal-based rotating electrical machine according to the present invention;

FIG. 3 is a detailed view of a rotor frame structure of a liquid metal drive-based rotating electrical machine according to the present invention;

fig. 4 is a detailed view of the structure of the annular water tank of the rotating motor based on liquid metal driving of the invention.

Wherein: the electric motor comprises an upper motor frame 1, an upper conductive slip ring stator 2, ball bearings I and II 8 and 14, an upper conductive slip ring stator electrode 13, a liquid metal in the upper conductive slip ring 3, an upper conductive slip ring rotor electrode 12, a rotor frame 4, a motor rotating shaft 15, a graphite electrode 11, a lower conductive slip ring rotor electrode 5, a liquid metal in the lower conductive slip ring 10, a lower conductive slip ring stator electrode 6, an annular water tank 9 and a lower motor frame 7. 401 is an annular water tank above the center of the rotor frame 4, 402 is a tubular boss below the center of the rotor frame 4, 901 is an outer ring water tank of the annular water tank, and 902 is an inner ring water tank of the annular water tank.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the rotating electrical machine driven by liquid metal according to the present invention includes an upper electrical machine frame 1, a lower electrical machine frame 7, liquid metal 3 in an upper conductive slip ring, liquid metal 10 in a lower conductive slip ring, a first ball bearing 8, a second ball bearing 14, a rotor frame 4, a graphite electrode 11, an upper conductive slip ring stator 2, an upper conductive slip ring stator electrode 13, a lower conductive slip ring stator electrode 6, an upper conductive slip ring rotor electrode 12, a lower conductive slip ring rotor electrode 5, an annular water tank 9, and an electrical machine shaft 15.

The upper motor frame 1 and the lower motor frame 7 are of concentric circle structures, and the upper motor frame 1 is mounted at the top of the lower motor frame 7 to form a cylindrical support frame of the rotary motor driven by liquid metal.

Wherein, annular water tank 9 is installed and fixed in lower motor frame 7 bottom, and the central round hole of annular water tank 9 cooperatees with the annular boss at lower motor frame 7 bottom center, guarantees that annular water tank 9 is concentric with lower motor frame 7.

Wherein, the outer ring water tank 901 of the annular water tank 9 is filled with electrolyte solution such as sodium hydroxide solution; the lower conductive slip ring stator electrode 6 is laid at the bottom of the inner ring water tank 902 of the annular water tank 9, the liquid metal 10 and the electrolyte solution in the lower conductive slip ring are injected, and the lower conductive slip ring stator electrode 6 provides a power supply access port for external power supply of the rotor frame 4.

The rotor frame 4 and the motor rotating shaft 15 are assembled together and fixed in a supporting frame of the liquid metal driven rotating motor consisting of the upper motor frame 1 and the lower motor frame 7 through the ball bearing 8 and the ball bearing II 14.

The rotor frame 4 is uniformly distributed with a plurality of storage cavities for storing liquid metal droplets, and the outer surface of each liquid metal storage cavity is respectively provided with two graphite electrodes 11 and arranged along the rotating direction of a rotating motor driven by liquid metal; the storage chamber of the rotor frame 4 is immersed in the electrolyte solution in the inner water tank 901 of the annular water tank 9 and a certain gap is left at the bottom of the inner water tank 901 of the annular water tank 9.

Wherein, a circular water tank 401 is arranged above the center of the rotor frame 4, and a tubular boss 402 is arranged below the circular water tank. An upper layer conductive slip ring rotor electrode 12 is laid at the bottom of the circular water tank 401 above the circle center of the rotor frame 4, and liquid metal 3 and electrolyte solution in the upper layer conductive slip ring are injected into the water tank; the bottom of the tubular boss 402 below the rotor frame 4 is fixed with a lower conductive slip ring rotor electrode 5.

Wherein, upper strata conducting slip ring stator electrode 13 lays in upper strata conducting slip ring stator 2 bottom to together the cover is on last motor frame 1, provides the power access mouth for the outside power supply of rotor frame 4.

A gap is reserved between a stator electrode 6 of the lower conductive slip ring and a rotor electrode 5 of the lower conductive slip ring and used for storing liquid metal 10 in the lower conductive slip ring; and a gap is reserved between the stator electrode 13 of the upper conductive slip ring and the rotor electrode 12 of the upper conductive slip ring and used for storing the liquid metal 3 in the upper conductive slip ring. Because the liquid metal has the fluid property of liquid and the good conductivity of the metal material, the relative rotation of the annular water tank 9 and the rotor frame 4 is realized, and the communication between the stator electrode 6 of the lower conductive slip ring and the rotor electrode 5 of the lower conductive slip ring and the circuit communication between the stator electrode 13 of the upper conductive slip ring and the rotor electrode 12 of the upper conductive slip ring are ensured.

The surfaces of the upper conductive slip ring stator electrode, the upper conductive slip ring rotor electrode, the lower conductive slip ring stator electrode and the lower conductive slip ring rotor electrode need to be subjected to electrowetting treatment, so that liquid metal is adhered to the surfaces, and the conductive reliability of the upper conductive slip ring and the lower conductive slip ring is improved.

The two graphite electrodes 11 on each liquid metal storage cavity on the rotor frame 4 are respectively connected with the upper conductive slip ring rotor electrode 12 and the lower conductive slip ring rotor electrode 5 through copper wires, and the graphite electrodes 11 on the rotor frame 4 connected with the upper conductive slip ring rotor electrode 12 and the graphite electrodes 11 connected with the lower conductive slip ring rotor electrode 5 are distributed at intervals; and the stator electrode 13 of the upper conductive slip ring and the stator electrode 6 of the lower conductive slip ring are respectively connected with an external direct-current power supply, so that continuous power supply of the rotating motor based on liquid metal driving is realized.

The graphite electrode 11 on the liquid metal storage cavity of the rotor frame 4 provides an independent driving electric field for the liquid metal in the storage cavity, a layer of electric double layer is formed on the surface of the liquid metal in the storage cavity in an electrolyte solution, the electric double layer on the surface of the liquid metal is redistributed under the action of the electric field, the voltage of the electric double layer close to the positive electrode is increased, and the voltage of the electric double layer close to the negative electrode is reduced. Because of the limited conductivity of the electrolyte solution, a potential gradient is created between the interface of the liquid metal and the surrounding electrolyte along the direction of the graphite electrode line. According to the lippmann equation and the young-laplace equation, the pressure difference close to the anode is smaller than the pressure difference close to the cathode, and the unbalanced pressure difference can generate a driving force to drive the liquid metal to move towards the anode, so that the motor rotor is driven to rotate.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.