CN118224233A - Magnetorheological fluid damping structure, magnetorheological fluid damping device and control method - Google Patents

Abstract

The invention provides a magnetorheological fluid damping structure, a magnetorheological fluid damping device and a control method, wherein the damping structure comprises the following components: the magnetorheological fluid cavity is provided with a first inlet pipe and a first outlet pipe which are communicated with the magnetorheological fluid container. The liquid metal pipeline is provided with a coil part which surrounds along the circumference of the magnetorheological fluid cavity, two ends of the coil part extend to form a second inlet pipe and a second outlet pipe, and the second inlet pipe and the second outlet pipe are respectively communicated with the liquid metal container. The first flow control structure is suitable for controlling the magnetorheological fluid to be filled into the magnetorheological fluid cavity from the magnetorheological fluid container through the first inlet pipe or controlling the magnetorheological fluid to flow into the magnetorheological fluid container from the magnetorheological fluid cavity through the first outlet pipe. The second flow control structure is suitable for controlling the liquid metal to be filled into the liquid metal pipeline from the liquid metal container through the second inlet pipe or controlling the liquid metal to flow into the liquid metal container from the liquid metal pipeline through the second outlet pipe. The electrical control structure is adapted to provide a voltage to the liquid metal in the liquid metal line.

Description

Magnetorheological fluid damping structure, magnetorheological fluid damping device and control method

Technical Field

The invention relates to the technical field of motion damping structures, in particular to a magnetorheological fluid damping structure, a magnetorheological fluid damping device and a magnetorheological fluid damping control method.

Background

Magnetorheological fluid (Magnetorheological Fluids, MRF) is an intelligent material, and the shape and the performance of the magnetorheological fluid are influenced and controlled by an externally applied magnetic field. At present, magnetorheological fluid is increasingly applied to structures such as vibration reduction devices, dampers, clutches and the like, and is widely applied to the fields such as automobile industry, hydraulic transmission, sealing, precision machining, biotechnology, medical treatment and the like.

When the magnetorheological fluid is free of an external magnetic field, magnetic particles in the magnetorheological fluid are uniformly dispersed in the carrier fluid, and the magnetorheological fluid has good Newtonian fluid characteristic of fluidity, and when the magnetorheological fluid is subjected to the action of the external magnetic field, the magnetic particles are quickly magnetized and aggregated into a chain-shaped and cluster-shaped structure to block the flow of the magnetorheological fluid, so that the viscosity of the magnetorheological fluid is quickly increased in a short time, and the magnetorheological fluid has mechanical properties similar to those of solids. In the prior art, a cavity for accommodating magnetorheological fluid is arranged at a power output end of a driving piece, an exciting coil is arranged outside or in the cavity, when damping is needed to be provided for the power output end, a magnetic field is applied to the magnetorheological fluid through the exciting coil, the viscosity of the magnetorheological fluid is increased to prevent the power output end from moving or slow down the movement amplitude of the power output end, the viscosity of the magnetorheological fluid is controllable, and the viscosity of the magnetorheological fluid can be flexibly controlled by changing the strength of the magnetic field, so that the magnetorheological fluid has great development potential in the aspect of power damping. However, the magnetorheological fluid and the exciting coil are built in a sealed cavity, and the replacement and maintenance processes are complex. In addition, heat is not easy to dissipate in the working process of the exciting coil and the magnetorheological fluid, so that damping power is directly influenced, and the performance of the magnetorheological fluid is reduced.

Disclosure of Invention

Therefore, the invention aims to overcome the defects of complex replacement and maintenance processes and difficult heat dissipation of the magnetorheological fluid damping structure in the prior art, thereby providing the magnetorheological fluid damping structure, the magnetorheological fluid damping device and the control method.

In a first aspect, the present invention provides a magnetorheological fluid damping structure comprising:

the magnetorheological fluid cavity is provided with a first inlet pipe and a first outlet pipe which are communicated with the magnetorheological fluid container;

The liquid metal pipeline is provided with a coil part which surrounds the magnetorheological fluid cavity along the circumferential direction, two ends of the coil part extend to form a second inlet pipe and a second outlet pipe, and the second inlet pipe and the second outlet pipe are respectively communicated with the liquid metal container;

The first flow control structure is suitable for controlling magnetorheological fluid to be filled into the magnetorheological fluid cavity from the magnetorheological fluid container through the first inlet pipe or controlling the magnetorheological fluid to flow into the magnetorheological fluid container from the magnetorheological fluid cavity through the first outlet pipe;

a second flow control structure adapted to control the filling of the liquid metal pipe with liquid metal from the liquid metal container through the second inlet pipe, or to control the flow of liquid metal from the liquid metal pipe into the liquid metal container through the second outlet pipe;

And the electric control structure is suitable for providing voltage for the liquid metal in the liquid metal pipeline.

Optionally, the first flow control structure comprises a first flow control valve arranged on the first inlet pipe and the first outlet pipe respectively, and a first liquid pump arranged on the first inlet pipe and/or the first outlet pipe;

the second flow control structure comprises second flow control valves respectively arranged on the first inlet pipe and the second outlet pipe, and a second liquid pump arranged on the second inlet pipe and/or the second outlet pipe.

Optionally, the electric control structure includes a first conductive unit and a second conductive unit, the first conductive unit is connected to the second inlet pipe, the second conductive unit is connected to the second outlet pipe, and the first conductive unit and the second conductive unit are adapted to provide voltages to the liquid metal in the second inlet pipe and the second outlet pipe, respectively.

Optionally, the magnetorheological fluid container is provided with a first maintenance interface, and the liquid metal container is provided with a second maintenance interface.

Optionally, the multiple groups of magnetorheological fluid cavities are connected to the magnetorheological fluid container through respective first inlet pipes and first outlet pipes, the multiple groups of liquid metal pipelines are connected to the liquid metal container through respective second inlet pipes and second outlet pipes, and the multiple groups of liquid metal pipelines are correspondingly arranged with the multiple groups of magnetorheological fluid cavities.

In a second aspect, the present invention provides a method for controlling a magnetorheological fluid damping structure, applied to the magnetorheological fluid damping structure, the method comprising:

filling magnetorheological fluid into the magnetorheological fluid cavity through the first inlet pipe;

filling liquid metal into the liquid metal pipeline through the second inlet pipe;

When the viscosity of the magnetorheological fluid needs to be changed, providing voltage for liquid metal in the coil part through an electric control structure;

And discharging the liquid metal into the liquid metal container through a second outlet pipe, and controlling the liquid metal in the liquid metal container to fill the liquid metal pipeline through the second inlet pipe.

Optionally, when the working temperature of the liquid metal pipeline reaches the set temperature, the second flow control structure controls the liquid metal in the liquid metal pipeline to enter the liquid metal container through the second outlet pipe, and controls the liquid metal in the liquid metal container to enter the liquid metal pipeline through the second inlet pipe.

Optionally, when the working temperature of the metal pipeline reaches a set temperature, discharging the liquid metal into the liquid metal container through the second outlet pipe, and controlling the liquid metal in the liquid metal container to fill the liquid metal pipeline through the second inlet pipe, including:

one of the two sets of liquid metal pipelines is recorded as a first set of liquid metal pipelines, and the other set is recorded as a second set of liquid metal pipelines;

Filling liquid metal into a second inlet pipe of the first group of liquid metal pipelines, and controlling the electric control structure to provide voltage for the second inlet pipe and the second outlet pipe of the first group of liquid metal pipelines;

Stopping providing voltage to the second inlet pipe and the second outlet pipe of the second group of liquid metal pipelines, and controlling the liquid metal of the second group of liquid metal pipelines to be discharged into the liquid metal container through the second outlet pipe.

In a third aspect, the present invention provides a magnetorheological fluid damping device comprising:

the magnetorheological fluid cavity is provided with a first inlet pipe and a first outlet pipe which are communicated with the magnetorheological fluid container;

The liquid metal pipeline is provided with a coil part which surrounds the magnetorheological fluid cavity along the circumferential direction, two ends of the coil part extend to form a second inlet pipe and a second outlet pipe, and the second inlet pipe and the second outlet pipe are respectively communicated with the liquid metal container;

The first flow control structure is suitable for controlling magnetorheological fluid to be filled into the magnetorheological fluid cavity from the magnetorheological fluid container through the first inlet pipe or controlling the magnetorheological fluid to flow into the magnetorheological fluid container from the magnetorheological fluid cavity through the first outlet pipe;

a second flow control structure adapted to control the filling of the liquid metal pipe with liquid metal from the liquid metal container through the second inlet pipe, or to control the flow of liquid metal from the liquid metal pipe into the liquid metal container through the second outlet pipe;

an electrical control structure adapted to provide a voltage to the liquid metal in the liquid metal pipeline;

The rotating shaft is rotatably arranged on the magnetorheological fluid cavity in a penetrating mode, and a rotating disc is coaxially arranged on the part, located in the magnetorheological fluid cavity, of the rotating shaft.

Optionally, the magnetorheological fluid device comprises a driving unit, wherein the magnetorheological fluid cavity is arranged at the output end of the driving unit, the rotating shaft is in transmission connection with the output end of the driving unit, and the magnetorheological fluid in the magnetorheological fluid cavity is suitable for providing damping for the output end of the driving unit through the rotating shaft under the condition that the two ends of the liquid metal pipeline have voltage.

In a fourth aspect, the present invention provides a magnetorheological fluid damping device comprising:

The magnetorheological fluid cavity is provided with a first inlet pipe and a first outlet pipe which are communicated with the magnetorheological fluid container; the liquid metal pipeline is provided with a coil part which surrounds the magnetorheological fluid cavity along the circumferential direction, two ends of the coil part extend to form a second inlet pipe and a second outlet pipe, and the second inlet pipe and the second outlet pipe are respectively communicated with the liquid metal container;

The first flow control structure is suitable for controlling magnetorheological fluid to be filled into the magnetorheological fluid cavity from the magnetorheological fluid container through the first inlet pipe or controlling the magnetorheological fluid to flow into the magnetorheological fluid container from the magnetorheological fluid cavity through the first outlet pipe;

a second flow control structure adapted to control the filling of the liquid metal pipe with liquid metal from the liquid metal container through the second inlet pipe, or to control the flow of liquid metal from the liquid metal pipe into the liquid metal container through the second outlet pipe;

an electrical control structure adapted to provide a voltage to the liquid metal in the liquid metal pipeline;

one end of the piston rod extends into the magnetorheological fluid cavity, the other end of the piston rod extends out of the magnetorheological fluid cavity, and an end piston is arranged at one end of the piston rod, which is positioned in the magnetorheological fluid cavity.

The invention has the following advantages:

the magnetorheological fluid damping structure provided by the invention comprises: the device comprises a magnetorheological fluid cavity, a liquid metal pipeline, a first flow control structure, a second flow control structure and an electric control structure. The magnetorheological fluid cavity is provided with a first inlet pipe and a first outlet pipe which are communicated with the magnetorheological fluid container. The liquid metal pipeline is provided with a coil part which surrounds along the circumference of the magnetorheological fluid cavity, two ends of the coil part extend to form a second inlet pipe and a second outlet pipe, and the second inlet pipe and the second outlet pipe are respectively communicated with the liquid metal container. The first flow control structure is suitable for controlling the magnetorheological fluid to be filled into the magnetorheological fluid cavity from the magnetorheological fluid container through the first inlet pipe or controlling the magnetorheological fluid to flow into the magnetorheological fluid container from the magnetorheological fluid cavity through the first outlet pipe. The second flow control structure is suitable for controlling the liquid metal to be filled into the liquid metal pipeline from the liquid metal container through the second inlet pipe or controlling the liquid metal to flow into the liquid metal container from the liquid metal pipeline through the second outlet pipe. The electrical control structure is adapted to provide a voltage to the liquid metal in the liquid metal line.

Before the magnetorheological fluid damping structure works, the magnetorheological fluid in the magnetorheological fluid container can be controlled by the first flow control structure to fill the magnetorheological fluid cavity through the first inlet pipe, and after filling is completed, the first inlet pipe and the first outlet pipe are plugged. The liquid metal in the liquid metal container is controlled to enter the liquid metal pipeline through the second inlet pipe through the second flow control structure, the coil part is gradually filled with the liquid metal, then the liquid metal flows to the second outlet pipe, and then the second inlet pipe and the second outlet pipe are plugged through the second flow control structure. When the viscosity of the magnetorheological fluid needs to be changed, voltage can be respectively introduced into the second inlet pipe and the second outlet pipe through the electric control structure, the liquid metal has good conductivity, an electromagnetic field can be formed around the cavity of the magnetorheological fluid after the coil part is electrified, the viscosity of the magnetorheological fluid is changed under the action of the magnetic field, and the viscosity can be flexibly controlled by changing the voltage.

According to the magnetorheological fluid damping structure provided by the invention, the magnetorheological fluid in the magnetorheological fluid cavity can be replaced through the first inlet pipe and the first outlet pipe, and the liquid metal in the liquid metal pipeline can be replaced through the second inlet pipe and the second outlet pipe, so that the magnetorheological fluid cavity or the liquid metal pipeline is not required to be disassembled and assembled, and the replacement and maintenance processes are simplified. Moreover, the liquid metal has good heat conductivity, can absorb heat generated by working of the magnetorheological fluid, and can realize quick heat transfer and heat dissipation by virtue of self fluidity, so that the working performance of the damping structure is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a magnetorheological fluid damping structure according to a first embodiment;

FIG. 2 is a schematic diagram showing a multistage parallel connection of magnetorheological fluid damping structures in the first embodiment;

FIG. 3 is a schematic diagram showing a structure of a magnetorheological fluid damping device according to a third embodiment;

FIG. 4 is a schematic diagram showing the structure of a magnetorheological fluid damping device according to a fourth embodiment;

Reference numerals illustrate:

1. A magnetorheological fluid cavity; 11. a magnetorheological fluid container; 111. a first maintenance interface; 12. a first inlet pipe; 13. a first outlet pipe; 2. a liquid metal pipeline; 21. a coil section; 22. a second inlet pipe; 23. a second outlet pipe; 24. a liquid metal container; 241. a second maintenance interface; 31. a first flow control valve; 32. a second flow control valve; 331. a first conductive unit; 332. a second conductive unit; 51. a rotating shaft; 52. a turntable; 62. a piston rod; 63. an end piston.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

As shown in fig. 1, in this embodiment, there is provided a magnetorheological fluid damping structure including: the magnetorheological fluid device comprises a magnetorheological fluid cavity 1, a liquid metal pipeline 2, a first flow control structure, a second flow control structure and an electric control structure.

The magnetorheological fluid cavity 1 is provided with a first inlet pipe 12 and a first outlet pipe 13 which are communicated with the magnetorheological fluid container 11. Magnetorheological fluid can enter the magnetorheological fluid cavity 1 from the magnetorheological fluid container 11 through the first inlet pipe 12, can enter the magnetorheological fluid container 11 from the magnetorheological fluid cavity 1 through the first outlet pipe 13, the magnetorheological fluid cavity 1 is made of hard materials or flexible materials, and the magnetorheological fluid container 11 can contain magnetorheological fluid for supplementing or replacing the magnetorheological fluid in the magnetorheological fluid cavity 1.

The liquid metal pipeline 2 is provided with a coil part 21 which surrounds the magnetorheological fluid cavity 1 along the circumferential direction, the coil part 21 can be tightly attached to the outer edge of the magnetorheological fluid cavity 1, a gap can also exist between the coil part 21 and the magnetorheological fluid cavity 1, two ends of the coil part 21 extend to form a second inlet pipe 22 and a second outlet pipe 23, and the second inlet pipe 22 and the second outlet pipe 23 are respectively communicated with the liquid metal container 24. The liquid metal can enter the liquid metal pipeline 2 from the liquid metal container 24 through the second inlet pipe 22, and can enter the liquid metal container 24 from the liquid metal pipeline through the second outlet pipe 23, the liquid metal pipeline 2 can be made of hard materials or flexible materials, and the liquid metal container 24 can contain the liquid metal for supplementing or replacing the liquid metal in the liquid metal pipeline 2.

The first flow control structure is adapted to control the filling of the magnetorheological fluid cavity 1 from the magnetorheological fluid container 11 through the first inlet tube 12 or to control the flow of the magnetorheological fluid from the magnetorheological fluid cavity 1 into the magnetorheological fluid container 11 through the first outlet tube 13. The first flow control structure is used for controlling the conduction or the blocking of the first inlet pipe 12 and the first outlet pipe 13 and controlling the flow of the magnetorheological fluid between the magnetorheological fluid container 11 and the magnetorheological fluid cavity 1.

The second flow control structure is suitable for controlling the liquid metal to be filled into the liquid metal pipeline from the liquid metal container through the second inlet pipe or controlling the liquid metal to flow into the liquid metal container from the liquid metal pipeline through the second outlet pipe. The second flow control structure is used for controlling the conduction or the blocking of the second inlet pipe 22 and the second outlet pipe 23 and controlling the flow of the liquid metal between the liquid metal container 24 and the liquid metal pipeline 2.

The electrical control structure is adapted to provide a voltage to the liquid metal in the liquid metal line 2. For example, the electrical control structure may be disposed on the liquid metal pipeline 2, specifically, the electrical control structure includes a first conductive unit 331 and a second conductive unit 332, the first conductive unit 331 is connected to the second inlet pipe 22, the second conductive unit 332 is connected to the second outlet pipe 23, the first conductive unit 331 and the second conductive unit 332 are adapted to provide voltages to the liquid metal in the second inlet pipe 22 and the second outlet pipe 23, for example, provide a positive voltage on the second inlet pipe 22 and a negative voltage on the second outlet pipe 23, and when the liquid metal pipeline 2 is filled with the liquid metal, a current is formed between the second inlet pipe 22, the coil portion 21 and the second outlet pipe 23, so that a magnetic field is formed around the coil portion 21, the viscosity of the magnetorheological fluid in the magnetorheological fluid cavity 1 begins to increase under the effect of the magnetic field, and then the viscosity of the magnetorheological fluid can be flexibly adjusted by changing the magnitudes of the voltages and the currents, so as to flexibly adjust the damping provided by the magnetorheological fluid. Of course, the first conductive unit 331 and the second conductive unit 332 may be directly disposed at both ends of the coil part 21, and may be determined according to actual situations.

For example, before the magnetorheological fluid damping structure works, the magnetorheological fluid in the magnetorheological fluid container 11 can be controlled by the first flow control structure to be filled into the magnetorheological fluid cavity 1 through the first inlet pipe 12, and after the filling is completed, the first inlet pipe 12 and the first outlet pipe 13 are blocked. The liquid metal in the liquid metal container 24 is controlled to enter the liquid metal pipeline 2 through the second inlet pipe 22 by the second flow control structure, the coil part 21 is gradually filled with the liquid metal, the liquid metal further flows to the second outlet pipe 23, and then the second inlet pipe 22 and the second outlet pipe 23 are blocked by the second flow control structure.

When the viscosity of the magnetorheological fluid needs to be changed, voltage can be respectively introduced into the second inlet pipe 22 and the second outlet pipe 23 through the electric control structure, the liquid metal has good conductivity, an electromagnetic field can be formed around the magnetorheological fluid cavity 1 after the coil part 21 is electrified, the viscosity of the magnetorheological fluid is changed under the action of the magnetic field, and the viscosity can be flexibly controlled by changing the voltage.

According to the magnetorheological fluid damping structure provided by the invention, the magnetorheological fluid in the magnetorheological fluid cavity 1 can be replaced through the first inlet pipe 12 and the first outlet pipe 13, and the liquid metal in the liquid metal pipeline can also be replaced through the second inlet pipe 22 and the second outlet pipe 23, so that the magnetorheological fluid cavity 1 or the liquid metal pipeline 2 is not required to be disassembled and assembled, and the replacement and maintenance processes are simplified. Moreover, the liquid metal has good heat conductivity, can absorb heat generated by working of the magnetorheological fluid, and can realize quick heat transfer and heat dissipation by virtue of self fluidity, so that the working performance of the damping structure is ensured.

In this embodiment, the first inlet pipe 12, the first outlet pipe 13, the second inlet pipe 22 and the second outlet pipe 23 may be provided with check valves to avoid the backflow of the magnetorheological fluid or the liquid metal.

As shown in fig. 1, in the present embodiment, the first flow control structure includes first flow control valves 31 provided on the first inlet pipe 12 and the first outlet pipe 13, respectively, and a first liquid pump provided on the first inlet pipe 12 and/or the first outlet pipe 13. The first flow control valve 31 can control the conduction or the blocking of the first inlet pipe 12 and the first outlet pipe 13, and the first liquid pump can pump the magnetorheological fluid from the magnetorheological fluid container 11 into the magnetorheological fluid cavity 1 or pump the magnetorheological fluid from the magnetorheological fluid cavity 1 into the magnetorheological fluid container 11.

The second flow control structure comprises a second flow control valve 32 arranged on the second inlet pipe 22 and the second outlet pipe 23, respectively, and a second liquid pump arranged on the second inlet pipe 22 and/or the second outlet pipe 23. The second flow control valve 32 may control the conduction or blocking of the second inlet pipe 22 and the second outlet pipe 23, and the second liquid pump may pump the liquid metal from the liquid metal container 24 into the liquid metal pipe 2 or pump the liquid metal in the liquid metal pipe 2 into the liquid metal container 24.

In this embodiment, the second liquid pump may be an insulating pressure vacuum pump, where the insulating pressure vacuum pump is disposed on the second outlet pipe 23, when the insulating pressure vacuum pump works, the liquid metal in the liquid metal container 24 may be pumped into the coil portion 21, and the original liquid metal in the coil portion 21 is pumped out, and the liquid metal in the liquid metal pipeline in the insulating pressure vacuum pump does not contact with the liquid metal in the downstream liquid metal container 24 in the working process of the insulating pressure vacuum pump, so that the liquid metal can be replaced in the working process of the coil portion 21, so as to facilitate heat dissipation. In this embodiment, the system further includes a control unit, which may be a programmable logic controller (PLC, programmable Logic Controller) and may preset a program to control the operations of the first and second flow control structures according to the need. For example, the time for filling the magnetorheological fluid cavity 1 may be set according to practical applications, so as to prepare for providing damping for the magnetorheological fluid, or the magnetorheological fluid in the magnetorheological fluid cavity 1 may be controlled to flow into the magnetorheological fluid container 11, so as to perform replacement of the magnetorheological fluid. The same principle also allows to control the flow of liquid metal between the liquid metal line 2 and the liquid metal container 24 to complete the filling or replacement of the liquid metal.

In this embodiment, the magnetorheological fluid damping structure further has a temperature sensor, and the temperature sensor is adapted to monitor the temperature of the liquid metal pipeline 2 and/or the magnetorheological fluid cavity 1, and trigger and send an electrical signal to the control unit when reaching a preset temperature, and the control unit controls the second flow control structure to work based on the electrical signal so as to dissipate heat.

As shown in fig. 1, in the present embodiment, the magnetorheological fluid container 11 is provided with a first maintenance interface 111, and the liquid metal container 24 is provided with a second maintenance interface 241. The magnetorheological fluid in the magnetorheological fluid container 11 can be replaced through the first maintenance interface 111 and the liquid metal in the liquid metal container 24 can be replaced through the second maintenance interface 241.

As shown in fig. 2, in the present embodiment, a plurality of groups of magnetorheological fluid cavities 1 are connected to a magnetorheological fluid container 11 through respective first inlet pipes 12 and first outlet pipes 13, a plurality of groups of liquid metal pipelines 2 are connected to a liquid metal container 24 through respective second inlet pipes 22 and second outlet pipes 23, and a plurality of groups of liquid metal pipelines 2 are disposed corresponding to a plurality of groups of magnetorheological fluid cavities 1.

For example, according to the design principle that a group of liquid metal pipelines 2 corresponds to a group of magnetorheological fluid cavities 1, according to the above positional relationship, the coil part 21 is surrounded on the outer side of the magnetorheological fluid cavities 1, and each group of magnetorheological fluid cavities 1 is correspondingly provided with an independent first flow control structure, and each group of liquid metal pipelines 2 is correspondingly provided with an independent second flow control structure and an electric control structure, so that independent control of the viscosity of the magnetorheological fluid in each group of magnetorheological fluid cavities 1 can be realized, and the same heat dissipation effect as that in the above can be realized.

Example two

The control method provided in this embodiment may be applied to the magnetorheological fluid damping structure in the first embodiment, where the magnetorheological fluid damping structure has been described in detail in the first embodiment, and is not described in detail in this embodiment, and the control method provided in this embodiment is as follows:

Before the magnetorheological fluid damping structure works, the magnetorheological fluid cavity 1 and the liquid metal pipeline 2 are required to be respectively filled with the magnetorheological fluid and the liquid metal, and the flow of the liquid metal is required to be flexibly regulated in the working process so as to facilitate heat dissipation, thereby avoiding the problem that the damping performance of the magnetorheological fluid is reduced due to overhigh temperature of the liquid metal and the magnetorheological fluid. The control method provided by the embodiment comprises the following steps:

And filling the magnetorheological fluid into the magnetorheological fluid cavity through the first inlet pipe. As described in the first embodiment, the magnetorheological fluid can be controlled to fill the magnetorheological fluid cavity by the first flow control structure.

And filling the liquid metal pipeline with liquid metal through the second inlet pipe. The liquid metal filling liquid metal pipeline can be controlled by a second flow control structure.

When the viscosity of the magnetorheological fluid needs to be changed, voltage is provided for the liquid metal in the metal pipeline through the electric control structure. For example, voltages may be supplied to the second inlet pipe and the second outlet pipe, respectively, so that a magnetic field is formed around the coil portion.

And discharging the liquid metal into a liquid metal container through a second outlet pipe, and controlling the liquid metal in the liquid metal container to fill a liquid metal pipeline through a second inlet pipe. Through the mode, the liquid metal pipeline can be radiated, and then the magnetorheological fluid cavity is indirectly radiated, so that the working performance of the magnetorheological fluid is ensured.

In a specific implementation manner of this embodiment, when the working temperature of the liquid metal pipeline reaches the set temperature, the second flow control structure controls the liquid metal in the liquid metal pipeline to enter the liquid metal container through the second outlet pipe, and controls the liquid metal in the liquid metal container to enter the liquid metal pipeline through the second inlet pipe.

Specifically, the working temperature may be a real-time temperature of the coil portion, the set temperature may be a critical temperature when the viscosity coefficient of the magnetorheological fluid is promoted to change, in the working state, the magnetorheological fluid is rubbed to generate a part of heat, the liquid metal is electrified to generate a part of heat, and the magnetorheological fluid cannot flow in the damping state, so that the flow of the liquid metal can be controlled, and the purpose of rapid heat dissipation is achieved by utilizing the fluidity and the thermal conductivity of the magnetorheological fluid. For example, as described above, the temperature of the liquid metal pipeline and/or the magnetorheological fluid cavity can be detected in real time by the temperature sensor, and the control unit controls the second flow control structure to work to complete heat dissipation.

Example III

The structure and the connection relation of the magnetorheological fluid damping structure in the embodiment are identical to those of the magnetorheological fluid damping structure in the first embodiment, and the embodiment provides a specific structure for damping work by applying the magnetorheological fluid damping structure to a driving piece, wherein the driving piece can be a driving motor.

As shown in fig. 3, in this embodiment, there is provided a magnetorheological fluid damping apparatus including: the magnetorheological fluid device comprises a magnetorheological fluid cavity, a liquid metal pipeline, a first flow control structure, a second flow control structure, an electric control structure and a transmission shaft.

The magnetorheological fluid cavity 1 is provided with a first inlet pipe 12 and a first outlet pipe 13 which are communicated with the magnetorheological fluid container 11. As in the first embodiment, the magnetorheological fluid may flow between the magnetorheological fluid chamber 1 and the magnetorheological fluid container 11.

The liquid metal pipeline is provided with a coil part 21 which surrounds along the circumference of the magnetorheological fluid cavity, two ends of the coil part 21 extend to form a second inlet pipe and a second outlet pipe, and the second inlet pipe and the second outlet pipe are respectively communicated with the liquid metal container. In the same way, the coil portion 21 may provide a magnetic field to the magnetorheological fluid in the magnetorheological fluid chamber.

The first flow control structure is suitable for controlling the magnetorheological fluid to be filled into the magnetorheological fluid cavity from the magnetorheological fluid container through the first inlet pipe or controlling the magnetorheological fluid to flow into the magnetorheological fluid container from the magnetorheological fluid cavity through the first outlet pipe.

The second flow control structure is suitable for controlling the liquid metal to be filled into the liquid metal pipeline from the liquid metal container through the second inlet pipe or controlling the liquid metal to flow into the liquid metal container from the liquid metal pipeline through the second outlet pipe.

The electrical control structure is adapted to provide a voltage to the liquid metal in the liquid metal line.

The rotating shaft 51 rotates to penetrate through the magnetorheological fluid cavity 1, the part of the rotating shaft 51 located in the magnetorheological fluid cavity 1 is coaxially provided with a rotary disc 52, a through hole allowing the rotating shaft 51 to penetrate through is formed in the center of the rotary disc 52, the rotating shaft 51 and the through hole can be fixed in a welding mode, and the rotary disc 52 is used for improving the contact area with the magnetorheological fluid so that the magnetorheological fluid can effectively provide damping.

The principle is the same as that of the first embodiment, under the influence of the magnetic field provided by the liquid metal pipeline, the viscosity of the magnetorheological fluid in the magnetorheological fluid cavity is increased, so that the friction force between the magnetorheological fluid and the turntable 52 is increased, the magnetic field is continuously increased, and the magnetorheological fluid can completely limit the turntable 52 to rotate, so that the braking effect is achieved.

In this embodiment, the magnetorheological fluid damping device includes a driving unit, the driving unit may be a driving motor, the magnetorheological fluid cavity 1 is disposed at an output end of the driving unit, the rotating shaft 51 is in transmission connection with the output end of the driving unit, of course, the rotating shaft 51 may also be an output shaft of the driving unit, the magnetorheological fluid in the magnetorheological fluid cavity 1 is suitable for providing damping to the output end of the driving unit through the rotating shaft 51 under the condition that two ends of the liquid metal pipeline 2 have voltages, and the magnetorheological fluid can change viscosity in an extremely short time, thereby improving braking efficiency.

In the same way, the heat dissipation of the magnetorheological fluid can be realized by the working mode in the first embodiment.

Example IV

The structure and the connection relation of the magnetorheological fluid damping structure in the embodiment are identical to those of the magnetorheological fluid damping structure in the first embodiment, and the embodiment provides a specific structure for damping work by applying the magnetorheological fluid damping structure to a driving member, which can be a linear reciprocating driving structure.

As shown in fig. 4, the magnetorheological fluid damping device provided in this embodiment includes: the magnetorheological fluid cavity 1, a liquid metal pipeline, a first flow control structure, a second flow control structure, an electric control structure and a piston rod 62.

The magnetorheological fluid cavity 1 is provided with a first inlet pipe 12 and a first outlet pipe 13 which are communicated with the magnetorheological fluid container 11. The liquid metal pipeline 2 is provided with a coil part 21 which surrounds the magnetorheological fluid cavity 1 along the circumferential direction, two ends of the coil part 21 extend to form a second inlet pipe 22 and a second outlet pipe 23, and the second inlet pipe 22 and the second outlet pipe 23 are respectively communicated with a liquid metal container 24. The first flow control structure is adapted to control the filling of the magnetorheological fluid cavity 1 from the magnetorheological fluid container 11 through the first inlet tube 12 or to control the flow of the magnetorheological fluid from the magnetorheological fluid cavity 1 into the magnetorheological fluid container through the first outlet tube 13. The second flow control structure is adapted to control the filling of the liquid metal line 22 with liquid metal from the liquid metal container 24 through the second inlet pipe 22 or to control the flow of liquid metal from the liquid metal line 2 into the liquid metal container 24 through the second outlet pipe 23. The electrical control structure is adapted to provide a voltage to the liquid metal in the liquid metal line 2.

One end of the piston rod 62 extends into the magnetorheological fluid cavity 1, the other end extends out of the magnetorheological fluid cavity 1, and an end piston 63 is arranged at one end of the piston rod 62, which is positioned in the magnetorheological fluid cavity 1.

The magnetorheological fluid damping structure in this embodiment can be used to provide damping for the piston rod 62 moving in a straight line, and after the liquid metal pipeline 2 is energized, the coil part 21 can provide a magnetic field for the magnetorheological fluid in the magnetorheological fluid cavity 1, and the viscosity of the magnetorheological fluid changes to further block the movement of the end piston 63 of the piston rod 62, so as to play a role in damping. In the same way, the heat dissipation of the magnetorheological fluid can be realized by the working mode in the first embodiment.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. A magnetorheological fluid damping structure, comprising:

the magnetorheological fluid cavity (1) is provided with a first inlet pipe (12) and a first outlet pipe (13) which are communicated with the magnetorheological fluid container (11);

A liquid metal pipeline (2) provided with a coil part (21) which surrounds along the circumferential direction of the magnetorheological fluid cavity (1), wherein two ends of the coil part (21) extend to form a second inlet pipe (22) and a second outlet pipe (23), and the second inlet pipe (22) and the second outlet pipe (23) are respectively communicated with a liquid metal container (24);

A first flow control structure adapted to control the filling of magnetorheological fluid from the magnetorheological fluid container (11) through the first inlet pipe (12) into the magnetorheological fluid cavity (1), or to control the flow of magnetorheological fluid from the magnetorheological fluid cavity (1) through the first outlet pipe (13) into the magnetorheological fluid container (11);

-a second flow control structure adapted to control the filling of the liquid metal line (2) with liquid metal from the liquid metal container (24) through the second inlet pipe (22), or to control the flow of liquid metal from the liquid metal line (2) into the liquid metal container (24) through the second outlet pipe (23);

and the electric control structure is suitable for providing voltage for the liquid metal in the liquid metal pipeline (2).

2. Magnetorheological fluid damping structure according to claim 1, characterized in that the first flow control structure comprises a first flow control valve (31) arranged on the first inlet pipe (12) and the first outlet pipe (13), respectively, and a first liquid pump arranged on the first inlet pipe (12) and/or the first outlet pipe (13);

the second flow control structure comprises a second flow control valve (32) respectively arranged on the first inlet pipe (12) and the second outlet pipe (23), and a second liquid pump arranged on the second inlet pipe (22) and/or the second outlet pipe (23).

3. Magnetorheological fluid damping structure according to claim 1, characterized in that the electrically controlled structure comprises a first electrically conductive unit (331) and a second electrically conductive unit (332), the first electrically conductive unit (331) being connected to the second inlet pipe (22), the second electrically conductive unit (332) being connected to the second outlet pipe (23), the first electrically conductive unit (331) and the second electrically conductive unit (332) being adapted to provide a voltage to the liquid metal in the second inlet pipe (22) and the second outlet pipe (23), respectively.

4. Magnetorheological fluid damping structure according to claim 1, characterized in that the magnetorheological fluid container (11) is provided with a first maintenance interface (111) and the liquid metal container (24) is provided with a second maintenance interface (241).

5. Magnetorheological fluid damping structure according to any one of claims 1 to 4, wherein a plurality of groups of the magnetorheological fluid cavities (1) are connected to the magnetorheological fluid container (11) through respective first inlet pipes (12) and first outlet pipes (13), a plurality of groups of the liquid metal pipelines (2) are connected to the liquid metal container (24) through respective second inlet pipes (22) and second outlet pipes (23), and a plurality of groups of the liquid metal pipelines (2) are arranged corresponding to the plurality of groups of the magnetorheological fluid cavities (1).

6. A control method of a magnetorheological fluid damping structure, applied to the magnetorheological fluid damping structure of claims 1 to 5, characterized in that the method comprises:

filling magnetorheological fluid into the magnetorheological fluid cavity (1) through the first inlet pipe (12);

filling the liquid metal pipeline (2) with liquid metal through a second inlet pipe (22);

when the viscosity of the magnetorheological fluid needs to be changed, providing voltage for liquid metal in the coil part (21) through an electric control structure;

Discharging liquid metal into a liquid metal container (24) through a second outlet pipe (23), and controlling the liquid metal in the liquid metal container (24) to fill the liquid metal pipeline (2) through the second inlet pipe (22).

7. The control method according to claim 6, characterized in that when the operating temperature of the liquid metal pipe (2) reaches a set temperature, a second flow control structure controls the liquid metal in the liquid metal pipe (2) to enter the liquid metal container (24) through the second outlet pipe (23), and controls the liquid metal in the liquid metal container (24) to enter the liquid metal pipe (2) through the second inlet pipe (22).

8. A magnetorheological fluid damping device, comprising:

the magnetorheological fluid cavity (1) is provided with a first inlet pipe (12) and a first outlet pipe (13) which are communicated with the magnetorheological fluid container (11);

A liquid metal pipeline (2) provided with a coil part (21) which surrounds along the circumferential direction of the magnetorheological fluid cavity (1), wherein two ends of the coil part (21) extend to form a second inlet pipe (22) and a second outlet pipe (23), and the second inlet pipe (22) and the second outlet pipe (23) are respectively communicated with a liquid metal container (24);

A first flow control structure adapted to control the filling of magnetorheological fluid from the magnetorheological fluid container (11) through the first inlet pipe (12) into the magnetorheological fluid cavity (1), or to control the flow of magnetorheological fluid from the magnetorheological fluid cavity (1) through the first outlet pipe (13) into the magnetorheological fluid container (11);

-a second flow control structure adapted to control the filling of the liquid metal line with liquid metal from the liquid metal container (24) through the second inlet pipe (22) or to control the flow of liquid metal from the liquid metal line into the liquid metal container (24) through the second outlet pipe (23);

an electrical control structure adapted to provide a voltage to the liquid metal in the liquid metal line:

The rotating shaft (51) is rotatably arranged on the magnetorheological fluid cavity (1) in a penetrating mode, and a rotary disc (52) is coaxially arranged on the portion, located in the magnetorheological fluid cavity (1), of the rotating shaft (51).

9. The magnetorheological fluid damping device according to claim 8, comprising a driving unit, wherein the magnetorheological fluid cavity (1) is arranged at an output end of the driving unit, wherein the rotating shaft (51) is in transmission connection with the output end of the driving unit, and wherein the magnetorheological fluid in the magnetorheological fluid cavity (1) is adapted to provide damping to the output end of the driving unit through the rotating shaft (51) in case of a voltage across the coil part (21).

10. A magnetorheological fluid damping device, comprising:

the magnetorheological fluid cavity (1) is provided with a first inlet pipe (12) and a first outlet pipe (13) which are communicated with the magnetorheological fluid container (11);

A liquid metal pipeline (2) provided with a coil part (21) which surrounds along the circumferential direction of the magnetorheological fluid cavity (1), wherein two ends of the coil part (21) extend to form a second inlet pipe (22) and a second outlet pipe (23), and the second inlet pipe (22) and the second outlet pipe (23) are respectively communicated with a liquid metal container (24);

A first flow control structure adapted to control the filling of magnetorheological fluid from the magnetorheological fluid container (11) through the first inlet pipe (12) into the magnetorheological fluid cavity (1), or to control the flow of magnetorheological fluid from the magnetorheological fluid cavity (1) through the first outlet pipe (13) into the magnetorheological fluid container (11);

-a second flow control structure adapted to control the filling of the liquid metal line with liquid metal from the liquid metal container (24) through the second inlet pipe (22) or to control the flow of liquid metal from the liquid metal line into the liquid metal container (24) through the second outlet pipe (23);

an electrical control structure adapted to provide a voltage to the liquid metal in the liquid metal pipeline;

One end of the piston rod (62) stretches into the magnetorheological fluid cavity (1), the other end of the piston rod extends out of the magnetorheological fluid cavity (1), and an end piston (63) is arranged at one end of the piston rod (62) located in the magnetorheological fluid cavity (1).