CN115823173A - Magneto-rheological and permanent magnet mixed self-powered damping device based on nested piston structure - Google Patents
Magneto-rheological and permanent magnet mixed self-powered damping device based on nested piston structure Download PDFInfo
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- 238000010248 power generation Methods 0.000 claims abstract description 146
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 50
- 230000006698 induction Effects 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims description 47
- 238000007789 sealing Methods 0.000 claims description 34
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
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- 230000005389 magnetism Effects 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 description 11
- 230000005674 electromagnetic induction Effects 0.000 description 6
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- 239000002907 paramagnetic material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
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- 239000002889 diamagnetic material Substances 0.000 description 1
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Abstract
The invention discloses a magnetorheological and permanent magnet mixed self-powered damping device based on a nested piston structure, which comprises a power generation piston assembly and an excitation piston assembly, wherein the power generation piston assembly comprises a power generation piston body, the power generation piston body is provided with a permanent magnet for providing a magnetic field, the excitation piston assembly comprises an inner cylinder barrel, the radial outer surface of the inner cylinder barrel is provided with a power generation coil for cutting a magnetic induction line, and the inner cylinder barrel is sleeved on the power generation piston body in a manner of sliding along the axial direction of the power generation piston body so that the power generation coil cuts the magnetic induction line in the magnetic field to generate induction current and axial electromagnetic damping force; according to the invention, the two pistons are designed into an inner-outer nested double-piston structure, so that kinetic energy can be converted into electric energy for storage when the two pistons move relatively, and the stored electric energy is used for adjusting damping force, thereby realizing the purpose of self-power supply.
Description
Technical Field
The invention belongs to the technical field of dampers, and relates to a magneto-rheological and permanent-magnet mixed self-powered damping device based on a nested piston structure.
Background
The damper is a device for dissipating vibration energy, and is widely applied to the industries of aerospace, aviation, war industry, guns, automobiles and the like, and the traditional fluid damper has the problem that the damping force cannot be adjusted, so that the damper is difficult to adapt to variable complex working conditions; the magneto-rheological damper solves the problem that the damping force is not adjustable to a great extent, is a variable damper based on magnetic field control, is widely applied to various industries, has the advantages of simple control, large adjustable range, high robustness and the like, but needs to be powered for a long time when being excited, has higher energy consumption, only has a single power supply, can only work as passive damping when being damaged, and only has the form of fluid damping force; the traditional hybrid damper still cannot overcome the problem of high energy consumption during damping force control.
In the prior art, most of the methods for reducing the energy consumption of the magnetorheological damper are to change the structure and the materials of parts of the magnetorheological damper, further optimize a magnetic circuit and further reduce the current required by the excitation of a coil so as to achieve the purpose of reducing the energy consumption, but the method is difficult to really solve the problem of energy consumption, can lead to the problems of complex structure, greatly improved material cost and the like.
Therefore, in order to solve the above technical problems, it is necessary to provide a new technical means.
Disclosure of Invention
In view of this, the invention provides a magnetorheological and permanent magnet hybrid self-powered damping device based on a nested piston structure, the invention is provided with two kinds of pistons at the same time, and the two kinds of pistons are designed into an inner and outer nested double-piston structure, so that when the two kinds of pistons move relatively, kinetic energy can be converted into electric energy to be stored through an electromagnetic induction principle, and the stored electric energy is used for adjusting damping force, so as to achieve the purpose of self-powering, and meanwhile, the double pistons can generate electromagnetic damping force and fluid damping force in the same direction when working, so that the working mode of the damping device is not limited to the form of fluid damping force.
The utility model provides a magneto rheological and permanent magnetism mix self-power damping device based on nested formula piston structure which characterized in that: the power generation piston assembly comprises a power generation piston body, the power generation piston body is provided with a permanent magnet for providing a magnetic field, the excitation piston assembly comprises an inner cylinder barrel, the radial outer surface of the inner cylinder barrel is provided with a power generation coil for cutting a magnetic induction line, and the inner cylinder barrel is sleeved on the power generation piston body in a manner of sliding along the axial direction of the power generation piston body, so that the power generation coil cuts the magnetic induction line in the magnetic field to generate induced current and axial electromagnetic damping force; the generating coil sets up in the radial surface of interior cylinder with clockwise or anticlockwise winding's mode, so set up and to guarantee that generating coil can continuously cut magnetic induction line.
The power supply module comprises a rectifying module and an electric storage module, the rectifying module and the electric storage module are electrically connected with the power generation coil, and induced current generated by the power generation coil is stored in the electric storage module after being rectified by the rectifying module. The electrical connection means forming a loop through wire connection, and of course, other ways of achieving circuit connection are also possible, which is a technical solution that can be understood by those skilled in the art and is not described herein in detail.
The excitation piston assembly further comprises an excitation piston body, the excitation piston body is mounted in the working cavity in a sliding mode along the axis direction of the working cylinder, a radial gap between the excitation piston body and the working cylinder serves as a damping channel, magnetorheological fluid is arranged in the working cavity, and the excitation piston body slides in the working cavity and extrudes the magnetorheological fluid to enable the magnetorheological fluid to flow through the damping channel to generate fluid damping force.
Furthermore, the excitation piston assembly also comprises an outer cylinder barrel and an isolation sleeve, wherein the outer cylinder barrel is sleeved on the inner cylinder barrel so that the inner cylinder barrel and the outer cylinder barrel form a closed magnetic flux loop; the isolation sleeve is sleeved on the outer cylinder barrel and used for isolating the magnetic field, and the excitation piston body is sleeved on the isolation sleeve; the two ends of the axial direction of the isolation sleeve extend inwards along the radial direction to form limiting parts, the limiting parts limit the outer cylinder barrel, the power generation coil and the inner cylinder barrel in the axial direction, the inner cylinder barrel and the outer cylinder barrel which form limiting cannot move relatively, and only can move synchronously under the pushing of the remaining sleeves.
The front end cover is arranged at the axial front end of the working cylinder barrel, and the rear end cover is arranged at the axial rear end of the working cylinder barrel; the excitation piston comprises an excitation piston body, an isolation sleeve, an outer cylinder barrel and an inner cylinder barrel, wherein the front end of the excitation piston body in the axial direction is provided with an excitation piston rod A, the rear end of the excitation piston body in the axial direction is provided with an excitation piston rod B, and the excitation piston rod A and the excitation piston rod B are used for pushing the excitation piston body, the isolation sleeve, the outer cylinder barrel and the inner cylinder barrel to synchronously slide; the front end cover is axially provided with a front mounting channel, the exciting piston rod A is arranged in the front mounting channel in a penetrating manner in a sliding manner in the front mounting channel, the rear end cover is axially provided with a rear mounting channel, and the exciting piston rod B is inserted in the front of the rear mounting channel in a sliding manner in the rear mounting channel; the front end cover and the rear end cover axially limit the sliding of the excitation piston assembly; the exciting piston body, the inner cylinder barrel, the outer cylinder barrel, the isolation sleeve, the exciting piston rod A and the exciting piston rod B are coaxially arranged.
The power generation piston assembly further comprises an iron core and a power generation piston rod for supporting the power generation piston body, the iron core and the permanent magnets are sequentially and alternately arranged along the axial direction to form the power generation piston body, and any two permanent magnets are arranged in a mode of opposite polarity; the power generation piston rod comprises a power generation piston rod A and a power generation piston rod B, the power generation piston rod A is installed at the front end of the power generation piston body in the axial direction, and the power generation piston rod B is installed at the rear end of the power generation piston body in the axial direction; the excitation piston rod A is provided with a support channel A along the axial direction, the support channel A is sleeved on the power generation piston rod A, the excitation piston rod B is provided with a support channel B along the axial direction, and the support channel B is sleeved on the power generation piston rod B; the rear end of the rear mounting channel is provided with a rear sealing cover for sealing the channel, and the power generation piston rod B is fixedly connected with the rear sealing cover; the power generation piston body, the power generation piston rod A and the power generation piston rod B are coaxially arranged.
Further, an exciting coil is arranged on the radial outer surface of the exciting piston body, the power supply module further comprises a control module, the exciting coil, the control module and the power storage module are connected in an electric connection mode, the control module is used for controlling the current entering the exciting coil, and the magnitude of the fluid damping force generated by the magnetorheological fluid is adjusted according to the magnitude of the current of the exciting coil. Currents with different magnitudes are fed into the exciting coil, so that the magnitude of magnetic induction intensity in the damping channel is changed, the shearing yield stress of the magnetorheological fluid in the area is changed, and the purpose of controlling the damping performance is achieved.
Further, the device also comprises a mounting disc used for connecting the exciting piston rod A with a preset position, and the mounting disc is mounted at the front side end of the exciting piston rod A. The preset position refers to a place where the invention needs to be used, such as a position where damping and energy dissipation are needed in the aerospace and military field, the exciting piston rod a is connected with the preset position through the mounting disc, so that oscillation generated at the preset position can be transmitted to the exciting piston rod a through the mounting disc, and the energy generated by oscillation acts on the exciting piston rod a to enable the exciting piston rod a to synchronously slide in the axial push-pull exciting piston body, the isolating sleeve, the outer cylinder barrel and the inner cylinder barrel, so that the sliding of the exciting piston assembly is realized
Furthermore, the excitation piston assembly further comprises an insulating ring, the power generation coils are arranged in a plurality of uniformly distributed along the axial direction of the inner cylinder barrel, and the insulating ring is arranged between every two adjacent power generation coils. The number of the groups of the generating coils is determined according to the length of the inner cylinder barrel, and the generating coils are preferably used for fully winding the radial outer surface of the inner cylinder barrel, so that the magnetic induction lines can be cut more times by relative movement in sequence.
Furthermore, the exciting coils are arranged in a plurality of numbers, and the exciting coils are uniformly distributed along the axial direction of the exciting piston body.
Further, the working cylinder barrel, the excitation piston body, the power generation piston body and the mounting disc are coaxially arranged. The coaxial arrangement is intended to provide a smoother sliding movement of the present invention during operation, while also providing an even wear of the various parts.
The invention has the beneficial effects that:
the invention discloses a magneto-rheological and permanent-magnet mixed self-powered damping device based on a nested piston structure, which is used as a damper with adjustable damping force, wherein electromagnetic damping and magneto-rheological fluid damping are mixed and vibration energy can be collected, the design of inner and outer nested double pistons can ensure that the damper can store vibration energy through electromagnetic induction when forced vibration is carried out, the damper is forced to vibrate to dissipate energy, meanwhile, a part of energy is converted into electric energy through electromagnetic induction generated by relative motion of a power generation piston assembly and an excitation piston assembly to be stored, when the damping needs to be controlled, the stored electric energy is output to an excitation coil group in the excitation piston assembly through a control module to further change the magnetic induction intensity in a damping channel, so that the shearing yield stress of the magneto-rheological fluid in the flow channel area is changed to achieve the purpose of self-powered damping performance control, and because an isolation sleeve is arranged in the structure, the mutual influence of magnetic circuits of the inner and outer piston structures can be ignored; meanwhile, the power generation piston assembly can generate electromagnetic damping force when collecting energy through electromagnetic induction, and because the power generation piston assembly and the working cylinder assembly cannot generate relative motion, the excitation piston assembly, the power generation piston assembly and the working cylinder assembly generate the same-direction relative motion, and the direction of the electromagnetic damping force is consistent with the direction of the damping force generated by the magnetorheological fluid so as to form electromagnetic and fluid mixed damping force, wherein the fluid damping has the characteristic of large damping force and controllable wide range; the mounting disc of the damper and mounting holes in other positions can be customized according to requirements so as to be suitable for various different working conditions, and the power supply module can control to stop supplying power to the exciting coil so as to reach an energy storage state; when the power supply module is damaged, the passive damper can be used as a traditional passive damper to work, and can play a role in weak adjustment according to the self-adaption of electromagnetic damping and the passive control characteristic in a small range, so that the passive damper has good robustness.
Drawings
FIG. 1 is a cutaway isometric view of the present invention;
FIG. 2 is a side view of a power generating piston assembly of the present invention;
FIG. 3 is a side view of the energizing piston assembly of the present invention;
FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;
FIG. 5 is a sectional view taken along line B-B of FIG. 4;
FIG. 6 is a cross-sectional elevation view of the present invention;
FIG. 7 is an enlarged partial cross-sectional view taken at C of FIG. 6;
FIG. 8 is an enlarged partial cross-sectional view taken at D in FIG. 6;
FIG. 9 is a cross-sectional view taken along line E-E in FIG. 6
FIG. 10 is a schematic diagram of the working principle of the present invention;
FIG. 11 is an enlarged partial cross-sectional view taken at F in FIG. 10;
reference numerals: the device comprises a permanent magnet 1, an iron core A2, an iron core B3, an iron core C4, a power generation piston rod A5, a power generation piston rod B6, a countersunk screw A7, an inner cylinder 8, a power generation coil group 9, an insulating ring 10, an outer cylinder 11, an isolation cylinder cover 12, an isolation cylinder 13, an excitation piston body 14, an excitation coil group 15, an excitation piston rod A16, an excitation piston rod B17, a power generation lead 18, an excitation lead 19, a countersunk screw B20, a working cylinder 21, a front end cover 22, a rear end cover 23, a rear sealing cover 24, a countersunk screw C25, a magnetorheological fluid 26, an O-shaped sealing ring A27, an O-shaped sealing ring B28, an O-shaped sealing ring C29, a sealing ring A30, a sealing ring B31, a sealing ring C32, a mounting disc 33, a rectifying module 34, an electric storage module 35, a control module 36 and an interface module 37.
Detailed Description
FIG. 1 is a cut-away isometric view of the present invention; FIG. 2 is a side view of a power generating piston assembly of the present invention; FIG. 3 is a side view of the energizing piston assembly of the present invention; FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3; FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4; FIG. 6 is a cross-sectional elevation view of the present invention; FIG. 7 is an enlarged partial cross-sectional view taken at C of FIG. 6; FIG. 8 is an enlarged partial cross-sectional view taken at D in FIG. 6; FIG. 9 is a cross-sectional view taken along line E-E of FIG. 6 and FIG. 10 is a schematic diagram illustrating the operation of the present invention; fig. 11 is a partial enlarged sectional view at F in fig. 10. Reference numerals are as follows: the device comprises a permanent magnet 1, an iron core A2, an iron core B3, an iron core C4, a power generation piston rod A5, a power generation piston rod B6, a countersunk screw A7, an inner cylinder 8, a power generation coil group 9, an insulating ring 10, an outer cylinder 11, an isolation cylinder cover 12, an isolation cylinder 13, an excitation piston body 14, an excitation coil group 15, an excitation piston rod A16, an excitation piston rod B17, a power generation lead 18, an excitation lead 19, a countersunk screw B20, a working cylinder 21, a front end cover 22, a rear end cover 23, a rear sealing cover 24, a countersunk screw C25, a magnetorheological fluid 26, an O-shaped sealing ring A27, an O-shaped sealing ring B28, an O-shaped sealing ring C29, a sealing ring A30, a sealing ring B31, a sealing ring C32, a mounting disc 33, a rectifying module 34, an electric storage module 35, a control module 36 and an interface module 37.
In the description of the present specification, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. If not specifically stated, the sleeve is disposed on the radial outer surface, for example, the inner cylinder 8 is slidably disposed on the power generation piston body along the axial direction of the power generation piston body, that is, the inner cylinder 8 is slidably disposed on the radial outer surface of the power generation piston body along the axial direction of the power generation piston body.
A magneto-rheological and permanent magnet hybrid self-powered damping device based on a nested piston structure comprises a power generation piston assembly and an excitation piston assembly, wherein the power generation piston assembly comprises a power generation piston body, the power generation piston body is provided with a permanent magnet 1 for providing a magnetic field, the excitation piston assembly comprises an inner cylinder 8, a power generation coil 9 for cutting a magnetic induction line is arranged on the radial outer surface of the inner cylinder 8, and the inner cylinder 8 is sleeved on the power generation piston body in a manner of sliding along the axis direction of the power generation piston body so that the power generation coil 9 cuts the magnetic induction line in the magnetic field to generate induction current and axial electromagnetic damping force; the power generation coil 9 is arranged on the radial outer surface of the inner cylinder barrel 8 in a clockwise winding mode, and the power generation coil 9 can be ensured to continuously cut the magnetic induction wire by the arrangement.
The power supply module comprises a rectifying module 34 and an electric storage module 35, the rectifying module 34 and the electric storage module 35 are electrically connected with the generating coil 9, and induced current generated by the generating coil 9 is rectified by the rectifying module 34 and then stored in the electric storage module 35. In this embodiment, two power generation leads 18 are further provided for connecting the power generation coil 9 and the power module, the two power generation leads 18 are disposed on two radial sides of the power generation coil 9 and located between the power generation coil 9 and the inner cylinder 8, which represent a positive electrode and a negative electrode, respectively, an induced current generated by the power generation coil 9 flows out from the positive electrode to the power module, and a current flows into the power generation coil 9 through the negative electrode to form a closed loop, so that a power generation flow can be realized. This is a technical means that can be understood by those skilled in the art, and is not described herein in detail.
In this embodiment, the magnetorheological fluid damper further includes a working cylinder 21, the working cylinder 21 has a working cavity, the excitation piston assembly further includes an excitation piston body 14, the excitation piston body 14 is mounted in the working cavity in a manner of being slidable along an axial direction of the working cylinder 21, a radial gap between the excitation piston body and the working cylinder is a damping channel, a magnetorheological fluid 26 is disposed in the working cavity, and the excitation piston body 14 slides in the working cavity to extrude the magnetorheological fluid 26 so that the magnetorheological fluid 26 flows through the damping channel to generate a fluid damping force. As shown in the drawing, a space defined by the inner wall of the working cylinder 21 in this embodiment is a working chamber, a radial gap between the excitation piston body 14 and the inner wall of the working cylinder 21 is a damping channel, an axial gap between the excitation piston body 14 and the inner wall of the working cylinder 21 is a storage chamber for storing the magnetorheological fluid 26, and the damping channel is communicated with the storage chamber, because the excitation piston body 14 slides in the working chamber, the position of the storage chamber changes, when the excitation piston body 14 is located at the axial front end of the working chamber, the storage chamber is located at the axial tail end of the working chamber, as the excitation piston body 14 slides from the front side of the working chamber to the rear end of the working chamber, a gap between the excitation piston body 14 and the inner wall surface of the axial rear side of the working cylinder 21 is gradually reduced, and a gap between the excitation piston body 14 and the inner wall surface of the axial front side of the working cylinder 21 is gradually increased, at this time, the magnetorheological fluid 26 flows from the axial rear side of the working chamber to the axial front side of the working chamber through the damping channel, and the magnetorheological fluid 26 generates a fluid damping force in the axial direction in this process, which is not repeated description by technical staff.
In this embodiment, a groove is formed in the radial outer surface of the excitation piston body 14, the excitation coil 15 is wound in the groove, the power module further includes a control module 36, the excitation coil 15, the control module 36 and the power storage module 35 are electrically connected, the control module 36 is configured to control the magnitude of current entering the excitation coil 15, and the magnitude of the current of the excitation coil 15 adjusts the magnitude of the fluid damping force generated by the magnetorheological fluid 26. In this embodiment, two excitation leads 19 are further provided for connecting the excitation coil 15 and the power module, the two excitation leads 19 are disposed on two radial sides of the excitation coil 15 and located between the excitation coil 15 and the working cylinder 21, the two excitation leads 19 represent an anode and a cathode respectively, a current of the power module flows out of the excitation coil 15 from the anode, flows out of the excitation coil 15 from the cathode and returns to the power module to form a closed loop, so as to generate an excitation magnetic field, currents of different magnitudes flow into the excitation coil 15, so that the magnetic induction intensity of the excitation magnetic field is changed, further the magnitude of the magnetic induction intensity received by the magnetorheological fluid 26 is changed, the shear yield stress of the magnetorheological fluid 26 flowing through the damping channel is changed, and the purpose of controlling the damping performance is achieved. This is a technical means that can be understood by those skilled in the art, and is not described herein in detail.
In this embodiment, the excitation piston assembly further includes an outer cylinder 11 and an isolation sleeve, and the outer cylinder 11 is sleeved on the inner cylinder 8 so that the inner cylinder 8 and the outer cylinder 11 form a closed magnetic flux loop; the isolation sleeve is sleeved on the outer cylinder barrel 11 and used for isolating a magnetic field, and the excitation piston body 14 is sleeved on the isolation sleeve; the two ends of the axial direction of the isolation sleeve extend inwards along the radial direction to form limiting parts, the limiting parts limit the outer cylinder barrel 11, the power generation coil 9 and the inner cylinder barrel 8 in the axial direction, the inner cylinder barrel 8 and the outer cylinder barrel 11 which form the limiting parts do not move relatively, and only can move synchronously under the pushing of the remaining sleeves. The isolation sleeve in this embodiment is split type structure, including isolation barrel 13 and isolation cover 12, as shown in the figure, isolation barrel 13 cover is located outer cylinder 11, and isolation cover 12 lid is established and is kept apart barrel 13, make isolation sleeve to whole the surrounding of forming of inner cylinder 8 and outer cylinder 11, isolated magnetic field has still played the spacing function of axial simultaneously with radial spacing, the isolation sleeve of this embodiment adopts contrary magnetic material, the purpose is to keep apart power generation magnetic circuit and excitation magnetic circuit, reduce its influence each other to neglectable.
In this embodiment, the hydraulic cylinder further comprises a front end cover 22 and a rear end cover 23, wherein the front end cover 22 is installed at the axial front end of the working cylinder 21, and the rear end cover 23 is installed at the axial rear end of the working cylinder 21; an excitation piston rod A16 is arranged at the axial front end of the excitation piston body 14, an excitation piston rod B17 is arranged at the axial rear end of the excitation piston body 14, and the excitation piston rod A16 and the excitation piston rod B17 are used for pushing the excitation piston body 14, the isolation sleeve, the outer cylinder 11 and the inner cylinder 8 to synchronously slide; a front mounting channel is axially formed in the front end cover 22, the excitation piston rod a16 is inserted into the front mounting channel in a manner of sliding in the front mounting channel, a rear mounting channel is axially formed in the rear end cover 23, and the excitation piston rod B17 is inserted into the front of the rear mounting channel in a manner of sliding in the rear mounting channel; the front end cover 22 and the rear end cover 23 form limit on the sliding of the excitation piston assembly in the axial direction; the exciting piston body 14, the inner cylinder 8, the outer cylinder 11, the isolation sleeve, the exciting piston rod a16 and the exciting piston rod B17 are coaxially arranged. As shown in the figure, the excitation piston rod a16 and the excitation piston rod B17 in this embodiment are both hollow rod structures and are respectively connected with two axial ends of the excitation piston body 14 through countersunk screws B20 to realize detachable fixation; in the embodiment, the inner cylinder barrel 8, the outer cylinder barrel 11, the excitation piston body 14 and the countersunk head screw B are made of paramagnetic materials, so that a magnetic circuit can smoothly pass through the parts; the exciting piston rod A1616 and the exciting piston rod B1717 adopt inverse magnetic materials, and the purpose is to reduce the magnetic leakage of a magnetic circuit from the part;
in this embodiment, the power generation piston assembly further includes an iron core and a power generation piston rod for supporting the power generation piston body, the iron core and the permanent magnets 1 are sequentially and alternately arranged along the axial direction to form the power generation piston body, and any two permanent magnets 1 are arranged in a mode of opposite polarity. As shown in the figure, the three types of iron cores are arranged in the embodiment and are respectively an iron core A2, an iron core B3 and an iron core C4, the iron core C4 is provided with three bosses with internal screw holes, the permanent magnets 1 and the iron core B3 are provided with hole sites corresponding to the bosses with internal screw threads on the iron core C4, when the permanent magnets are assembled, every two permanent magnets 1 are opposite in the same polarity, the magnetic circuits of the adjacent permanent magnets 1 have the same directional regionality so as to enhance induced current, an iron core B3 is arranged between every two permanent magnets 1 so as to provide a space of the same directional magnetic circuits for the two permanent magnets 1 opposite in the same polarity, the number of the permanent magnets 1 and the number of the iron cores B3 can be determined according to the size of a working condition, the iron core A2 is provided with countersunk hole sites corresponding to the bosses and is connected with the iron core C4 through countersunk head screws A7 so as to lock all the parts, and thus a power generation piston body is formed; the power generation piston rod comprises a power generation piston rod A5 and a power generation piston rod B6, the power generation piston rod A5 is installed at the front end of the power generation piston body in the axial direction, and the power generation piston rod B6 is installed at the rear end of the power generation piston body in the axial direction; the excitation piston rod A16 is provided with a support channel A along the axial direction, the support channel A is sleeved on the power generation piston rod A5, the excitation piston rod B17 is provided with a support channel B along the axial direction, and the support channel B is sleeved on the power generation piston rod B6; the rear end of the rear mounting channel is provided with a rear sealing cover 24 for sealing the channel, and the power generation piston rod B6 is fixedly connected with the rear sealing cover 24; the power generation piston body, the power generation piston rod A5 and the power generation piston rod B6 are coaxially arranged. The front end cover 22 and the rear end cover 23 in the embodiment are connected with the two axial ends of the working cylinder 21 in a threaded connection mode, and the rear sealing cover is connected with the rear end cover 23 through a sunk screw C25; the power generation piston rod B6 is connected with the rear sealing cover through threads, and is bonded by adopting a thread fastening agent when necessary, so that no relative motion between the two components is ensured. Iron core A2, iron core B3, iron core C4 and countersunk screw A7 in this embodiment all adopt paramagnetic material to guarantee that the magnetic circuit that permanent magnet 1 produced the magnetic field can pass through this part smoothly, power generation piston rod A5 all adopts the diamagnetic material with power generation piston rod B6, and the mode that corresponds respectively and iron core A2 and iron core C4 pass through threaded connection is connected, can bond with the screw thread fastening agent when necessary, in order to reduce the magnetic leakage of magnetic circuit from this part, power generation piston rod A5 does not link up the power generation piston body with power generation piston rod B6, in order to reach the purpose that increases permanent magnet 1 effective volume and then increase effective peripheral magnetic induction intensity.
In this embodiment, a mounting plate 33 is further included for mounting the device in the operating position, said mounting plate 33 being mounted on the front end of the energizing piston rod a 16.
In this embodiment, the excitation piston assembly further includes an insulating ring 10, the power generation coils 9 are provided with a plurality of, and a plurality of the power generation coils 9 are evenly distributed along the inner cylinder barrel 8 in the axial direction, and the insulating ring 10 is provided between two adjacent power generation coils 9, and the insulating ring 10 is arranged to prevent the power generation coils 9 of adjacent beams from being short-circuited after the power generation coils 9 are damaged. The number of the groups of the generating coils 9 is determined according to the length of the inner cylinder 8, and the generating coils 9 are preferably used for fully winding the radial outer surface of the inner cylinder 8, so as to ensure that the magnetic induction lines can be cut more times in sequence through relative movement.
In this embodiment, three excitation coils 15 are provided, and the three excitation coils 15 are uniformly distributed along the axial direction of the excitation piston body 14.
In this embodiment, the working cylinder 21, the excitation piston body 14, the power generation piston body, and the mounting plate 33 are coaxially disposed. The coaxial arrangement is intended to provide a smoother sliding movement of the present invention during operation, while also providing an even wear of the components.
In this embodiment, in order to smoothly lead out the power generation lead 18 and the excitation lead 19 and connect the power module, holes or grooves are formed in corresponding positions on paths from which the power generation lead 18 and the excitation lead 19 are led out, as shown in the figure, the power generation lead 18 is led out from the power generation coil 9 group, and divided into a positive part and a negative part which pass through the lead holes on the two sides of the outer cylinder barrel 11, and then the positive part and the negative part are connected to the power module after penetrating into the lead grooves inside the excitation piston rod a16 along the lead grooves on the two sides inside the isolation sleeve; the excitation lead 19 is led out from the excitation coil 15 group, and is divided into a positive lead groove and a negative lead groove which penetrate into the lead groove inside the excitation piston rod a16 along the lead grooves on the two sides of the excitation piston body 14 and are led out from the top of the excitation piston rod a16 together with the power generation lead 18, so that the purpose of dividing into two parts is to prevent short circuit damage caused by damage of positive and negative circuits, and after the power generation lead 18 and the excitation lead 19 circuits are laid, all the lead grooves are filled with epoxy resin to be sealed, so that loosening and damage of the lead grooves are prevented.
In this embodiment, a plurality of sealing elements are further provided, as shown in the figure, the sealing elements include an O-ring a27, an O-ring B28, an O-ring C29, a sealing ring a30, a sealing ring B31 and a sealing ring C32, all the parts are respectively and correspondingly placed at a plurality of joints of the damper, and sealing grooves for installing the sealing elements are provided on the parts corresponding to the joints, so that the liquid filled in the damper does not leak. The mounting disc 33 is connected to the actuating piston rod a16 by a thread, and the size of the mounting disc 33 and the mounting hole site can be customized as required to meet different mounting requirements.
In the embodiment, because other fluids are not filled between the power generation piston body and the inner cylinder 8, the exciting piston rod B17 and the rear sealing cover of the damper are both provided with air holes so as to ensure the balance of internal and external air pressures; the sealed cavity formed between the power generation piston body and the inner cylinder 8 can be filled with other types of fluid to form a damper with mixed damping force, and when attention needs to be paid, the exciting piston rod B17 and the air hole in the rear sealing cover of the damper need to be sealed and filled.
In this embodiment the exciting piston assembly is simulated with sinusoidal displacement, in dampingWhile the forced vibration of the generator dissipates energy, sine-like currents with different phases are generated in the generating coil 9 I 0 The current is converted into direct current with small ripple after passing through the rectifier module 34 I The power storage module 35 is charged, that is, a part of energy is converted into electric energy by using electromagnetic induction generated by the relative motion of the power generation piston assembly and the excitation piston assembly for storage, when discharge excitation is not performed, the whole damper is in a passive working state, and when damping needs to be controlled, the stored electric energy outputs currents with different magnitudes through the control module 36 I 1 The excitation coil 15 in the excitation piston assembly further changes the magnetic induction intensity (magnetic flux density mode) of the damping channel of the magnetorheological fluid 26, so that the shear yield stress of the magnetorheological fluid 26 in the flow channel area is changed, further the fluid damping force is changed to achieve the purpose of self-powered control of the damping performance, meanwhile, the power generation piston assembly generates electromagnetic damping force when collecting energy through electromagnetic induction, and as the power generation piston assembly and the working cylinder 21 assembly cannot generate relative motion, the excitation piston assembly, the power generation piston assembly and the working cylinder 21 assembly generate same-direction relative motion, further the direction of the electromagnetic damping force is consistent with the direction of the damping force generated by the magnetorheological fluid 26, so as to form electromagnetic and fluid mixed damping force, wherein the fluid damping has the characteristics of large damping force and controllable wide range, the electromagnetic damping has the characteristics of renewable energy, small damping force, self-adaption and small-range passive control, the outer piston is an exciting piston assembly and has a long fluid damping channel and a large effective exciting piston area, so the structure has a large damping force and damping force adjusting range, a control circuit can stop supplying power to the exciting coil 15 group in unnecessary occasions to reach an energy storage state, an interface module 37 is also added in the power supply module in the embodiment, the interface module 37 can be connected with an external power supply to ensure that the power supply can be switched to enable the power supply to still have the controllable damping characteristic when the power storage module 35 is damaged, if two sets of power supply systems are damaged, the electromagnetic damping passive damping power supply can work as the traditional passive damping, and the weak passive control characteristic can be achieved according to the self-adaption of the electromagnetic damping and the small-range passive control characteristicThe regulation effect is achieved, and therefore good robustness is achieved.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a magneto rheological and permanent magnetism mix self-power damping device based on nested formula piston structure which characterized in that: the power generation piston assembly comprises a power generation piston body, the power generation piston body is provided with a permanent magnet for providing a magnetic field, the excitation piston assembly comprises an inner cylinder barrel, the radial outer surface of the inner cylinder barrel is provided with a power generation coil for cutting a magnetic induction line, and the inner cylinder barrel is sleeved on the power generation piston body in a manner of sliding along the axial direction of the power generation piston body so that the power generation coil cuts the magnetic induction line in the magnetic field to generate induced current and axial electromagnetic damping force;
the power supply module comprises a rectifying module and an electric storage module, the rectifying module and the electric storage module are electrically connected with the power generation coil, and induced current generated by the power generation coil is stored in the electric storage module after being rectified by the rectifying module.
2. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 1, wherein: the magnetorheological fluid damper further comprises an excitation piston body, the excitation piston body is mounted in the working cavity in a sliding mode along the axis direction of the working cylinder, a radial gap between the excitation piston body and the working cylinder serves as a damping channel, magnetorheological fluid is arranged in the working cavity, and the excitation piston body slides in the working cavity and extrudes the magnetorheological fluid to enable the magnetorheological fluid to flow through the damping channel to generate fluid damping force.
3. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 2, wherein: the excitation piston assembly further comprises an outer cylinder barrel and an isolation sleeve, and the outer cylinder barrel is sleeved on the inner cylinder barrel so that the inner cylinder barrel and the outer cylinder barrel form a closed magnetic flux loop; the isolation sleeve is sleeved on the outer cylinder barrel and used for isolating the magnetic field, and the excitation piston body is sleeved on the isolation sleeve; the two ends of the axial direction of the isolation sleeve extend inwards along the radial direction to form a limiting part, and the limiting part limits the outer cylinder barrel, the power generation coil and the inner cylinder barrel in the axial direction.
4. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 3, wherein: the front end cover is arranged at the axial front end of the working cylinder barrel, and the rear end cover is arranged at the axial rear end of the working cylinder barrel; the excitation piston comprises an excitation piston body, an excitation piston rod A, an excitation piston rod B and a driving mechanism, wherein the excitation piston rod A is arranged at the axial front end of the excitation piston body, the excitation piston rod B is arranged at the axial rear end of the excitation piston body, and the excitation piston rod A and the excitation piston rod B are used for pushing the excitation piston body, the isolation sleeve, the outer cylinder barrel and the inner cylinder barrel to synchronously slide; the front end cover is axially provided with a front mounting channel, the exciting piston rod A is arranged in the front mounting channel in a penetrating manner in a sliding manner in the front mounting channel, the rear end cover is axially provided with a rear mounting channel, and the exciting piston rod B is inserted in the front of the rear mounting channel in a sliding manner in the rear mounting channel; the front end cover and the rear end cover axially limit the excitation piston assembly in a sliding manner; the exciting piston body, the inner cylinder barrel, the outer cylinder barrel, the isolation sleeve, the exciting piston rod A and the exciting piston rod B are coaxially arranged.
5. The magnetorheological and permanent magnet hybrid self-powered damping device based on a nested piston structure according to claim 4, wherein: the power generation piston assembly further comprises an iron core and a power generation piston rod for supporting the power generation piston body, the iron core and the permanent magnets are sequentially and alternately arranged along the axial direction to form the power generation piston body, and any two permanent magnets are arranged in a mode of opposite polarity; the power generation piston rod comprises a power generation piston rod A and a power generation piston rod B, the power generation piston rod A is installed at the front end of the power generation piston body in the axial direction, and the power generation piston rod B is installed at the rear end of the power generation piston body in the axial direction; the excitation piston rod A is provided with a support channel A along the axial direction, the support channel A is sleeved on the power generation piston rod A, the excitation piston rod B is provided with a support channel B along the axial direction, and the support channel B is sleeved on the power generation piston rod B; the rear end of the rear mounting channel is provided with a rear sealing cover for sealing the channel, and the power generation piston rod B is fixedly connected with the rear sealing cover; the power generation piston body, the power generation piston rod A and the power generation piston rod B are coaxially arranged.
6. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 2, wherein: the power module further comprises a control module, the exciting coil, the control module and the power storage module are connected in an electric connection mode, the control module is used for controlling the size of current entering the exciting coil, and the size of the current of the exciting coil adjusts the size of fluid damping force generated by the magnetorheological fluid.
7. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 5, wherein: the device also comprises a mounting disc used for connecting the exciting piston rod A with a preset position, and the mounting disc is mounted at the front side end of the exciting piston rod A.
8. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 6, wherein: the excitation piston assembly further comprises an insulating ring, the power generation coils are arranged in a plurality of uniformly distributed along the axial direction of the inner cylinder barrel, and the insulating ring is arranged between every two adjacent power generation coils.
9. The magnetorheological and permanent magnet hybrid self-powered damping device based on a nested piston structure according to claim 2, wherein: the exciting coil is provided in plurality, and a plurality of the exciting coils are arranged in the axial direction of the exciting piston body.
10. The magnetorheological and permanent magnet hybrid self-powered damping device based on the nested piston structure according to claim 7, wherein: the working cylinder barrel, the excitation piston body, the power generation piston body and the mounting disc are coaxially arranged.
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