CN113562180A - Aviation seat energy absorption device based on shape memory alloy - Google Patents
Aviation seat energy absorption device based on shape memory alloy Download PDFInfo
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- CN113562180A CN113562180A CN202111041001.7A CN202111041001A CN113562180A CN 113562180 A CN113562180 A CN 113562180A CN 202111041001 A CN202111041001 A CN 202111041001A CN 113562180 A CN113562180 A CN 113562180A
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 31
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 38
- 239000012530 fluid Substances 0.000 claims description 35
- 238000009434 installation Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 17
- 238000010248 power generation Methods 0.000 claims description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical class [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 abstract description 10
- 239000000725 suspension Substances 0.000 abstract description 3
- 238000013016 damping Methods 0.000 description 13
- 230000005611 electricity Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
- B64D11/0619—Arrangements of seats, or adaptations or details specially adapted for aircraft seats with energy absorbing means specially adapted for mitigating impact loads for passenger seats, e.g. at a crash
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/60—Crew or passenger accommodations
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Remote Sensing (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an aviation seat energy absorption device based on shape memory alloy, which comprises a base, wherein a mounting cavity and an annular cavity are formed in the base, the base is fixedly connected with a plurality of communicating pipes in a penetrating manner, the mounting cavity and the annular cavity are communicated with each other through the communicating pipes, the top wall of the base is connected with a sliding column in a penetrating and sliding manner, one end, positioned outside the base, of the sliding column is fixedly connected with a top plate, the side wall of the base is fixedly connected with a plurality of heat conducting seats, the heat conducting seats are connected with a friction rod in a penetrating and sliding manner, memory metal is fixedly connected between the heat conducting seats and the top plate, and a sliding plate is sleeved in the mounting cavity in a sealing and sliding manner. Has the advantages that: buffering is carried out through the cooperation of memory metal and magnetorheological suspensions, and the buffering effect in prior art is better, and the resistance that magnetorheological suspensions produced is more even, and the buffering is more steady, can carry out the regulation of resistance according to the impact force size by oneself simultaneously, and is more intelligent, and it is higher to take the comfort level.
Description
Technical Field
The invention relates to the technical field of aviation, in particular to an aviation seat energy absorption device based on shape memory alloy.
Background
Along with the continuous development of scientific and technological, people are also increasing to the curiosity of universe, the continuous development of science and technology can support the people to constantly explore the space, in order to explore the space, people constantly launch manned aviation equipment, further go to exploring unknown space, and manned aviation is in the air, the safety of astronaut is vital, when the aircraft descends to subaerial, the inside aviation seat of aircraft still can have great kinetic energy, current aviation seat often can only use the spring to cushion, its buffering effect is relatively poor.
The invention discloses a buffering and energy-absorbing device for an aviation seat, which is disclosed by the prior invention patent, such as Chinese patent with application patent number CN201911396535.4, and mainly comprises a buffering cylinder, a damping piece, a damping hole, an extrusion piece, a rubber ring and the like.
In the technical scheme, the damping effect is still general although the damping effect is better than that of the damping effect directly through a spring, and the risk of injury of astronauts still exists in the landing process of the aircraft.
Disclosure of Invention
The invention aims to solve the problems of poor buffering effect and the like in the prior art, and provides an aviation seat energy absorption device based on shape memory alloy.
In order to achieve the purpose, the invention adopts the following technical scheme:
an aviation seat energy absorption device based on shape memory alloy comprises a base, wherein a mounting cavity and an annular cavity are formed in the base, the base is fixedly connected with a plurality of communicating pipes in a penetrating mode, the communicating pipes are communicated with the mounting cavity and the annular cavity, the top wall of the base is connected with a sliding column in a penetrating and sliding mode, one end, located outside the base, of the sliding column is fixedly connected with a top plate, the side wall of the base is fixedly connected with a plurality of heat conducting seats, the heat conducting seats are connected with a friction rod in a penetrating and sliding mode, memory metal is fixedly connected between the heat conducting seats and the top plate, a sliding plate is sleeved in the mounting cavity in a sealing and sliding mode, one end, located in the mounting cavity, of the sliding column is fixedly connected with the sliding plate, an annular plate is sleeved in the annular cavity in a sealing and sliding mode, a plurality of buffer springs are fixedly connected between the annular plate and the bottom wall in the annular cavity, and magnetorheological fluid is filled between the annular plate and the sliding plate, the lower surface of the sliding plate is fixedly connected with a first electromagnet.
In the aviation seat energy absorption device based on the shape memory alloy, the lower surface of the base and the upper surface of the top plate are fixedly connected with the buffer piece, the upper surface of the base is provided with a delay switch, and the delay switch is electrically connected with the first electromagnet through a conducting wire.
In the shape memory alloy-based aviation seat energy absorption device, the side wall of the friction rod is provided with a frosting layer, and the heat conduction seat is made of a copper-tin alloy material.
In foretell aviation seat energy-absorbing device based on shape memory alloy, be provided with three group in the installation cavity and make magnetorheological suspensions evenly distributed's rabbling mechanism, the rabbling mechanism includes the fixed plate, the fixed plate runs through the bearing and rotates and be connected with the pivot, the diapire rotates through the bearing and is connected with three threaded rod in the installation cavity, threaded rod and sliding plate threaded connection, the pivot with correspond the threaded rod passes through one-way bearing and rotates and be connected, a plurality of arc pinion racks of installation cavity inside wall fixedly connected with, the pivot lateral wall rotates through the bearing and is connected with a plurality of puddlers, the one end interference fit that the pivot was kept away from to the puddler has the stirring gear, the stirring gear meshes with the arc pinion rack that corresponds, a plurality of stirring leaves of puddler lateral wall fixedly connected with.
In the shape memory alloy-based aviation seat energy absorption device, the lead angle of the threaded rod is larger than the equivalent friction angle of a screw pair formed by the threaded rod and the sliding plate, and a sealing gasket is arranged at the threaded connection part of the threaded rod and the sliding plate.
In the shape memory alloy-based aviation seat energy absorption device, three groups of stirring mechanisms are symmetrically arranged, and the included angle between each group is 120 degrees.
In foretell aviation seat energy-absorbing device based on shape memory alloy, the base lateral wall is provided with the power generation mechanism who is used for the electricity generation, power generation mechanism includes two generators, the generator inlays to be established in the base lateral wall, the input interference fit of generator has a rotating gear, the common fixedly connected with follow-up plate in friction stick bottom, follow-up plate lower fixed surface is connected with two racks, the rack meshes with the rotating gear that corresponds.
In foretell aviation seat energy-absorbing device based on shape memory alloy, it adjusts the chamber to have seted up in the base, adjust intracavity lateral wall fixedly connected with second electro-magnet, the second electro-magnet passes through the wire electricity with the generator and is connected, it has the current conducting plate to adjust intracavity diapire sliding connection, the current conducting plate with adjust fixedly connected with reset spring between the intracavity lateral wall, adjust intracavity lateral wall fixedly connected with resistance coil, the current conducting plate contacts with resistance coil, current conducting plate, resistance coil, first electro-magnet, time delay switch pass through the wire electricity and connect.
In the aviation seat energy absorption device based on the shape memory alloy, the bottom wall of the adjusting cavity is provided with a guide groove, the cross section of the guide groove is T-shaped, a T-shaped guide block is connected in the guide groove in a sliding mode, and the T-shaped guide block is fixedly connected with the current conducting plate.
Compared with the prior art, the invention has the advantages that:
1. in the first embodiment, when the heat conducting seat is impacted, the friction rod and the heat conducting seat generate heat through friction, so that the memory metal deforms, and when the heat conducting seat is reset after impact, the force of the memory metal recovering the original shape is used for buffering part of impact force and is matched with the buffer spring, so that a better buffer effect is achieved;
2. in the first embodiment, when the top plate is impacted and lowered, the sliding column drives the sliding plate to slide downwards, so that magnetorheological fluid in the annular cavity is pumped into the installation cavity, and the delay switch is triggered, so that the first electromagnet is electrified to generate magnetic force, the viscosity of the magnetorheological fluid is increased and the fluidity of the magnetorheological fluid is reduced under the action of the magnetic force, and therefore, when the sliding plate slides upwards to return the magnetorheological fluid to the annular cavity, the damping of the magnetorheological fluid is larger, the damping of the magnetorheological fluid is matched with the restoring force of the memory metal and the elastic force of the spring, the buffering effect of the magnetorheological fluid is further improved, and the safety of astronauts is effectively guaranteed;
3. in the second embodiment, the sliding plate slides downwards, and the stirring rod drives the stirring blades to revolve around the rotating shaft and rotate at the same time through the arrangement of the structures such as the threaded rod and the rotating shaft, so that the magnetorheological fluid is stirred through the stirring blades, the distribution of the magnetorheological fluid is more uniform, the damping generated by the magnetorheological fluid under the magnetic force is more uniform, and the buffering stability is improved;
4. in the third embodiment, in the flying process of the spacecraft, the top plate can continuously vibrate up and down due to the generated bumping, the bumping is buffered, the rotating gear is driven to rotate through the rack, the generator is used for generating electricity, and the generated electric energy is stored for later use, so that the energy is saved;
5. in the third embodiment, the current generated by the generator is related to the rotating speed of the rotating gear, and the rotating speed of the rotating gear is related to the magnitude of the impact force, so that the magnitude of the magnetic force generated by the second electromagnet is related to the magnitude of the impact force, the contact position of the conductive plate and the resistance coil is changed through the magnetic force generated by the second electromagnet, and the magnitude of the magnetic force generated by the first electromagnet is changed, namely the magnitude of the damping generated by the magnetorheological fluid is changed, so that the buffer damping can be automatically adjusted according to the magnitude of the impact force, the buffer damping is more intelligent, and the riding comfort of astronauts is higher.
Drawings
FIG. 1 is a schematic exterior view of a first embodiment of an aircraft seat energy absorption device based on shape memory alloy according to the present invention;
FIG. 2 is a schematic structural diagram of a first embodiment of an energy absorbing device for an aviation seat based on a shape memory alloy according to the present invention;
FIG. 3 is a schematic structural view of a second embodiment of an energy absorbing device for an aviation seat based on a shape memory alloy according to the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is a schematic structural view of a stirring mechanism in a second embodiment of an energy absorber for an aviation seat based on shape memory alloy according to the present invention;
FIG. 6 is a schematic exterior view of a third embodiment of an energy absorbing device for an aviation seat based on a shape memory alloy according to the present invention;
FIG. 7 is a schematic structural view of a third embodiment of an energy absorbing device for an aviation seat based on a shape memory alloy according to the present invention;
FIG. 8 is an enlarged view of FIG. 7 at B;
FIG. 9 is a schematic circuit connection diagram of a third embodiment of an energy absorber for an aviation seat based on a shape memory alloy according to the present invention.
In the figure: the device comprises a base 1, a 101 buffer member, a 2 installation cavity, a 201 sliding column, a 202 top plate, a 203 heat conducting seat, a 204 friction rod, a 205 sliding plate, a 206 annular cavity, a 207 annular plate, a 208 buffer spring, a 209 communicating pipe, 210 magnetorheological fluid, a 211 first electromagnet, a 212 time delay switch, 213 memory metal, a 3 follow-up plate, a 301 generator, a 302 rotating gear, a 303 rack, a 4 fixing plate, a 401 rotating shaft, a 402 threaded rod, a 403 stirring rod, a 404 stirring gear, a 405 arc toothed plate, a 406 stirring blade, a 5 adjusting cavity, a 501 second electromagnet, a 502 resistance coil, a conductive plate 503, a 504 reset spring, a 6 guide groove and a 601T-shaped guide block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-3, an aviation seat energy absorbing device based on shape memory alloy comprises a base 1, wherein a mounting cavity 2 and an annular cavity 206 are arranged in the base 1, the base 1 is fixedly connected with a plurality of communicating pipes 209 in a penetrating manner, the communicating pipes 209 communicate the mounting cavity 2 and the annular cavity 206, the top wall of the base 1 is connected with a sliding column 201 in a penetrating manner, a sealing gasket is arranged at the sliding connection position of the sliding column 201 and the top wall of the base 1 to ensure the sealing property of the mounting cavity 2, one end of the sliding column 201, which is positioned outside the base 1, is fixedly connected with a top plate 202, the side wall of the base 1 is fixedly connected with a plurality of heat conducting seats 203, the heat conducting seats 203 are connected with a friction rod 204 in a penetrating and sliding manner, a memory metal 213 is fixedly connected between the heat conducting seats 203 and the top plate 202, the memory metal 213 can be extended after being heated, so that heat generated by friction between the friction rod 204 and the heat conducting seats 203 is guided to the memory metal 213 and then can be extended, when the impact is buffered, the force generated by the memory metal 213 recovering to the original state can effectively buffer the impact force and offset part of the upward impact force of the top plate 202, so as to buffer the impact force, the installation cavity 2 is internally and hermetically sleeved with the sliding plate 205 in a sliding manner, one end of the sliding column 201 in the installation cavity 2 is fixedly connected with the sliding plate 205, the annular cavity 206 is internally and hermetically sleeved with the annular plate 207 in a sliding manner, a plurality of buffer springs 208 are fixedly connected between the annular plate 207 and the inner bottom wall of the annular cavity 206, magnetorheological fluid 210 is filled between the annular plate 207 and the sliding plate 205, the viscosity of the magnetorheological fluid 210 under a magnetic field is increased and is changed along with the change of the magnitude of the magnetic field, the lower surface of the sliding plate 205 is fixedly connected with a first electromagnet 211, when the impact is performed, the sliding plate 205 pumps the magnetorheological fluid 210 in the annular cavity 206 into the installation cavity 2 through a communicating pipe 209, and in the process of sliding upwards, the time delay switch 212 is triggered, the first electromagnet 211 is electrified to generate a magnetic field, so that the viscosity of the magnetorheological fluid 210 is increased, the fluidity is reduced, the resistance of the magnetorheological fluid 210 pumped back to the annular cavity 206 by the sliding plate 205 is increased, and the impact force generated by upward movement of the top plate 202 is buffered by the resistance and matched with the memory metal 213, so that the impact force is greatly buffered, and the safety of astronauts is protected.
The lower surface of the base 1 and the upper surface of the top plate 202 are fixedly connected with the buffer member 101, the upper surface of the base 1 is provided with the delay switch 212, and the delay switch 212 is triggered to be automatically disconnected after a circuit is powered on for a period of time, so that the details are omitted in the prior art, and the delay switch 212 is electrically connected with the first electromagnet 211 through a wire.
The friction stick 204 lateral wall is provided with the dull polish layer, and the setting up of dull polish layer makes friction stick 204 and heat conduction seat 203 friction can be better the production of heat, and heat conduction seat 203 is made for copper tin alloy material, and when copper tin alloy has good heat conductivity, still has better wearability, and the cost is lower.
In this embodiment, when the top plate 202 receives an impact force, the top plate 202 drives the sliding column 201 and the friction rod 204 to slide downwards, so that the friction rod 204 and the heat conducting seat 203 rub, so that the heat conducting seat 203 generates heat, the heat is transferred to the memory metal 213, the memory metal 213 is heated and extended to offset part of the impact force, meanwhile, the sliding column 201 drives the sliding plate 205 to slide downwards, the magnetorheological fluid 210 in the annular cavity 206 is pumped into the installation cavity 2 through the communicating pipe 209, and the delay switch 212 is triggered while the top plate 202 slides downwards, so that the first electromagnet 211 is electrified to generate a magnetic force;
and when the top plate 202 is lifted back after receiving impact force, the magnetic force generated by the first electromagnet 211 increases the viscosity of the magnetorheological fluid 210 and reduces the fluidity, so that the resistance of the sliding plate 205 when the magnetorheological fluid 210 in the mounting cavity 2 is pumped back to the annular cavity 206 is increased, at the moment, the temperature of the memory metal 213 is reduced, the memory metal is recovered to shrink, the impact force generated when the top plate 202 is lifted back is greatly offset through the resistance of the magnetorheological fluid 210 and the recovery shrink force of the memory metal 213, and the impact force is effectively buffered, so that the safety of astronauts is guaranteed.
Example two
Referring to fig. 3-5, the present embodiment differs from the first embodiment in that: stirring the magnetorheological fluid 210 to make the magnetorheological fluid uniformly distributed to generate uniform resistance, three groups of stirring mechanisms for uniformly distributing the magnetorheological fluid 210 are arranged in the installation cavity 2, each stirring mechanism comprises a fixed plate 4, the fixed plate 4 is in through rotating connection with a rotating shaft 401 through a bearing, the bottom wall in the installation cavity 2 is in rotating connection with three threaded rods 402 through bearings, the threaded rods 402 are in threaded connection with the sliding plate 205, the rotating shafts 401 are in rotating connection with the corresponding threaded rods 402 through one-way bearings, the arrangement of the one-way bearings enables the sliding plate 205 to descend to drive the threaded rods 402 to rotate so that the threaded rods 402 drive the rotating shafts 401 to rotate, when the sliding plate is retracted, the threaded rods 402 rotate reversely only relative to the rotating shafts 401 and cannot drive the rotating shafts to rotate, when the sliding plate is retracted, the viscosity of the magnetorheological fluid 210 is increased, at the moment, the stirring resistance is large, and the normal lifting of the sliding plate 205 can be influenced by stirring, 2 inside wall fixedly connected with of installation cavity 405, arc pinion rack 405 upper surface is provided with the tooth and meshes with the stirring gear 404 that corresponds, and pivot 401 lateral wall rotates through the bearing and is connected with a plurality of puddlers 403, and the one end interference fit that pivot 401 was kept away from to puddler 403 has stirring gear 404, and stirring gear 404 meshes with the arc pinion rack 405 that corresponds, and a plurality of stirring leaves 406 of puddler 403 lateral wall fixedly connected with.
The thread lead angle of the threaded rod 402 is larger than the equivalent friction angle of the screw pair formed by the threaded rod 402 and the sliding plate 205, so that the threaded connection between the threaded rod 402 and the sliding plate 205 is not self-locked, the lifting of the sliding plate 205 can drive the threaded rod 402 to rotate, a sealing gasket is arranged at the threaded connection between the threaded rod 402 and the sliding plate 205, leakage at the threaded connection is avoided due to the arrangement of the sealing gasket, and the sealing performance of the installation cavity 2 is guaranteed.
The three groups of stirring mechanisms are symmetrically arranged, and the included angle between each group is 120 degrees.
In this embodiment, when the sliding plate 205 is lowered by the impact force to draw the magnetorheological fluid 210 into the mounting cavity 2, the sliding plate 205 drives the threaded rod 402 to rotate through threaded connection, so that the threaded rod 402 drives the rotating shaft 401 to rotate, the rotating shaft 401 drives the stirring rod 403 to rotate around the rotating shaft 401, the stirring rod 403 rotates around the rotating shaft 401 while the stirring rod 404 is meshed with the arc toothed plate 405, so that the stirring rod 403 is driven by the stirring gear 404 to rotate, the stirring rod 403 revolves around the rotating shaft 401 while rotating, the stirring blade 406 is driven to revolve around the rotating shaft 401 while rotating together with the stirring rod 403, the magnetorheological fluid 210 in the mounting cavity 2 is stirred through the rotation of the stirring blade 406, suspended matters in the magnetorheological fluid 210 are uniformly distributed, and the magnetorheological fluid 210 has uniform viscosity under a magnetic field, the generated resistance is uniform, and the smooth rising of the sliding plate 205 is ensured.
EXAMPLE III
Referring to fig. 6 to 9, the present embodiment is different from the first embodiment in that: generate electricity through generator mechanism, adjust the resistance size simultaneously, base 1 lateral wall is provided with the power generation mechanism who is used for the electricity generation, power generation mechanism includes two generators 301, generator 301 can produce the electric energy through rotating, and carry to storage battery picture in not drawing and store, generator 301 inlays and establishes in base 1 lateral wall, generator 301's input interference fit has rotating gear 302, the common fixedly connected with follow-up plate 3 in friction bar 204 bottom, follow-up plate 3 is the loop configuration, cup joint with base 1 slip, two racks 303 of 3 lower fixed surface connection of follow-up plate, rack 303 meshes with the rotating gear 302 that corresponds.
An adjusting cavity 5 is arranged in the base 1, the inner side wall of the adjusting cavity 5 is fixedly connected with a second electromagnet 501, the second electromagnet 501 is electrically connected with the generator 301 through a conducting wire, the inner bottom wall of the adjusting cavity 5 is slidably connected with a conducting plate 503, a reset spring 504 is fixedly connected between the conducting plate 503 and the inner side wall of the adjusting cavity 5, the inner side wall of the adjusting cavity 5 is fixedly connected with a resistance coil 502, the conducting plate 503 is in contact with the resistance coil 502, the conducting plate 503, the resistance coil 502, the first electromagnet 211 and the delay switch 212 are electrically connected through conducting wires, the connection relation among the conducting plate 503, the resistance coil 502, the first electromagnet 211 and the delay switch 212 is shown in figure 9, so that the position of the conducting plate 503 can be controlled by the magnetic force generated by the second electromagnet 501, the resistance of the resistance coil 502 connected to the first electromagnet 211 is controlled according to the impact force, and the magnetic force generated by the first electromagnet 211 is controlled, thereby controlling the amount of resistance generated by the magnetorheological fluid 210.
The inner bottom wall of the adjusting cavity 5 is provided with a guide groove 6, the cross section of the guide groove 6 is T-shaped, a T-shaped guide block 601 is slidably connected in the guide groove 6, the T-shaped guide block 601 is fixedly connected with the conductive plate 503, and the T-shaped guide groove 6 is matched with the T-shaped guide block 601 to enable the conductive plate 503 to move more stably, so that the conductive plate is prevented from being separated from the resistance coil 502.
In the embodiment, when the top plate 202 is subjected to the impact force to descend or the continuous up-and-down vibration due to the bumping, the follow-up plate 3 is driven to descend and ascend together, so that the rotating gear 302 is driven to rotate through the meshing of the rack 303 and the gear 302 of the rotating gear 302, the generator 301 is used for generating electricity, and the storage battery is used for storing electricity, so that the energy is saved;
when receiving impact force, the movement speed of the follower plate 3 is related to the magnitude of the impact force, and the movement speed of the follower plate 3 determines the rotation speed of the rotating gear 302, that is, determines the magnitude of current generated when the generator 301 generates electricity, so that the magnitude of magnetic force generated by the second electromagnet 501 is related to the magnitude of the impact force, the position where the conductive plate 503 is in contact with the resistance coil 502 is changed by the magnetic force generated by the second electromagnet 501, when the impact force is larger, the magnetic force generated by the second electromagnet 501 is larger, the magnetic attraction force to the conductive plate 503 is larger, so that the conductive plate 503 slides towards the direction of the second electromagnet 501, at this time, the resistance of the resistance coil 502 connected to the first electromagnet 211 becomes smaller, so that the magnetic force of the first electromagnet 211 becomes larger, so that the viscosity of the variable fluid 210 is increased, the magnetic flow back resistance is increased, otherwise, when the impact force is smaller, the magnetic force of the first electromagnet 211 is smaller, the magnetorheological fluid 210 has relatively low viscosity and low pump back resistance, so that the damping buffer device can automatically adjust the damping buffer according to the impact force, is more intelligent, and has higher riding comfort for astronauts.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The aviation seat energy absorption device based on the shape memory alloy comprises a base (1) and is characterized in that a mounting cavity (2) and an annular cavity (206) are formed in the base (1), the base (1) is fixedly connected with a plurality of communicating pipes (209) in a penetrating manner, the communicating pipes (209) are communicated with the mounting cavity (2) and the annular cavity (206), the top wall of the base (1) is connected with a sliding column (201) in a penetrating manner, one end, located outside the base (1), of the sliding column (201) is fixedly connected with a top plate (202), the side wall of the base (1) is fixedly connected with a plurality of heat conduction seats (203), the heat conduction seats (203) are connected with a friction rod (204) in a penetrating manner in a sliding manner, memory metal (213) is fixedly connected between the heat conduction seats (203) and the top plate (202), and the sliding plate (205) is sleeved in the mounting cavity (2) in a sealing manner in a sliding manner, one end, located in the installation cavity (2), of the sliding column (201) is fixedly connected with the sliding plate (205), an annular plate (207) is sleeved in the annular cavity (206) in a sealing and sliding mode, a plurality of buffer springs (208) are fixedly connected between the annular plate (207) and the inner bottom wall of the annular cavity (206), magnetorheological fluid (210) is filled between the annular plate (207) and the sliding plate (205), and a first electromagnet (211) is fixedly connected to the lower surface of the sliding plate (205).
2. The shape memory alloy-based aviation seat energy absorption device of claim 1, wherein the lower surface of the base (1) and the upper surface of the top plate (202) are both fixedly connected with a buffer (101), the upper surface of the base (1) is provided with a delay switch (212), and the delay switch (212) is electrically connected with the first electromagnet (211) through a wire.
3. The shape memory alloy-based aviation seat energy absorption device as recited in claim 1, wherein the side wall of said friction bar (204) is provided with a frosted layer, and said heat conducting base (203) is made of copper-tin alloy.
4. The shape memory alloy-based aviation seat energy absorption device according to claim 1, wherein three sets of stirring mechanisms are arranged in the installation cavity (2) and used for enabling the magnetorheological fluid (210) to be uniformly distributed, each stirring mechanism comprises a fixed plate (4), the fixed plate (4) is rotatably connected with a rotating shaft (401) through a bearing in a penetrating manner, the inner bottom wall of the installation cavity (2) is rotatably connected with three threaded rods (402) through bearings, the threaded rods (402) are in threaded connection with a sliding plate (205), the rotating shaft (401) is rotatably connected with the corresponding threaded rods (402) through one-way bearings, a plurality of arc-shaped toothed plates (405) are fixedly connected to the inner side wall of the installation cavity (2), a plurality of stirring rods (403) are rotatably connected to the side wall of the rotating shaft (401) through bearings, and a stirring gear (404) is in interference fit with one end, far away from the rotating shaft (401), of each stirring rod (403), the stirring gear (404) is meshed with the corresponding arc toothed plate (405), and the side wall of the stirring rod (403) is fixedly connected with a plurality of stirring blades (406).
5. The shape memory alloy-based aviation seat energy absorption device of claim 4, wherein the lead angle of the threaded rod (402) is greater than the equivalent friction angle of a screw pair formed by the threaded rod (402) and the sliding plate (205), and a sealing gasket is arranged at the threaded connection position of the threaded rod (402) and the sliding plate (205).
6. An aircraft seat energy absorber based on shape memory alloy as claimed in claim 4 wherein three sets of said agitation mechanisms are symmetrically disposed, each set having an included angle of 120 °.
7. The shape memory alloy-based aviation seat energy absorption device is characterized in that a power generation mechanism for generating power is arranged on the side wall of the base (1), the power generation mechanism comprises two power generators (301), the power generators (301) are embedded in the side wall of the base (1), the input ends of the power generators (301) are in interference fit with rotating gears (302), the bottom ends of the friction rods (204) are fixedly connected with a follow-up plate (3) together, the lower surface of the follow-up plate (3) is fixedly connected with two racks (303), and the racks (303) are meshed with the corresponding rotating gears (302).
8. The shape memory alloy-based aviation seat energy absorption device according to claim 7, wherein an adjusting cavity (5) is formed in the base (1), a second electromagnet (501) is fixedly connected to the inner side wall of the adjusting cavity (5), the second electromagnet (501) is electrically connected with the generator (301) through a wire, a conductive plate (503) is slidably connected to the inner side wall of the adjusting cavity (5), a return spring (504) is fixedly connected between the conductive plate (503) and the inner side wall of the adjusting cavity (5), a resistance coil (502) is fixedly connected to the inner side wall of the adjusting cavity (5), the conductive plate (503) is in contact with the resistance coil (502), and the conductive plate (503), the resistance coil (502), the first electromagnet (211) and the delay switch (212) are electrically connected through wires.
9. The shape memory alloy-based aviation seat energy absorption device according to claim 8, wherein a guide groove (6) is formed in the inner bottom wall of the adjusting cavity (5), the cross section of the guide groove (6) is T-shaped, a T-shaped guide block (601) is slidably connected in the guide groove (6), and the T-shaped guide block (601) is fixedly connected with the conductive plate (503).
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