CN113562180B - Aviation seat energy absorbing device based on shape memory alloy - Google Patents
Aviation seat energy absorbing device based on shape memory alloy Download PDFInfo
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- CN113562180B CN113562180B CN202111041001.7A CN202111041001A CN113562180B CN 113562180 B CN113562180 B CN 113562180B CN 202111041001 A CN202111041001 A CN 202111041001A CN 113562180 B CN113562180 B CN 113562180B
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 39
- 239000012530 fluid Substances 0.000 claims description 31
- 238000009434 installation Methods 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000010248 power generation Methods 0.000 claims description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical class [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 abstract description 12
- 230000000149 penetrating effect Effects 0.000 abstract description 7
- 239000000725 suspension Substances 0.000 abstract description 3
- 238000013016 damping Methods 0.000 description 13
- 239000006096 absorbing agent Substances 0.000 description 10
- 230000005611 electricity Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Remote Sensing (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an aviation seat energy absorbing device based on a shape memory alloy, which comprises a base, wherein a mounting cavity and an annular cavity are formed in the base, a plurality of communicating pipes are fixedly connected in the base in a penetrating manner, the communicating pipes are communicated with the mounting cavity and the annular cavity, a sliding column is fixedly connected in the base top wall in a penetrating manner, a top plate is fixedly connected to one end of the sliding column, which is positioned outside the base, a plurality of heat conducting seats are fixedly connected to the side wall of the base, friction rods are fixedly connected in the heat conducting seats in a penetrating 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 sliding manner. The advantages are that: buffer through the cooperation of memory metal and magnetorheological suspensions, compare in prior art's buffering effect better, and the resistance that magnetorheological suspensions produced is more even, and it is more steady to buffer, can carry out the regulation of resistance according to impact force size by oneself simultaneously, and is more intelligent, takes the comfort level higher.
Description
Technical Field
The invention relates to the technical field of aviation, in particular to an aviation seat energy absorbing device based on shape memory alloy.
Background
Along with the continuous development of science and technology, the curiosity of people on the universe is also continuously increased, the continuous development of science and technology can support the continuous exploration of human beings to space, in order to explore space, the continuous launching manned aviation equipment of human beings further explores unknown space, and manned aviation, the safety of astronauts is vital, when the aircraft descends to subaerial, the aviation seat in the aircraft still can have great kinetic energy, the current aviation seat can only buffer with the spring alone often, its cushioning effect is relatively poor.
The prior invention patent, such as a Chinese patent with the application number of CN201911396535.4, discloses a buffering energy-absorbing device for an aviation seat, which mainly comprises a buffering barrel, a damping piece, a damping hole, an extrusion piece, a rubber ring and the like, wherein the buffering energy-absorbing device is used for buffering and absorbing energy of the aviation seat, and damping liquid is arranged in an energy-absorbing cavity, so that damping force generated between the damping liquid and a connecting component is used for buffering and absorbing energy of the aviation seat, and the buffering component can be prevented from excessively large kinetic energy in a rebound process, and the aviation seat is further slowly restored to an initial state, so that injury to a pilot is avoided.
In this technical solution, although better than the direct spring-based cushioning, the cushioning effect is still generally that the astronaut is still at risk of injury during the landing 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 absorbing device based on a shape memory alloy.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides an energy-absorbing device based on shape memory alloy aviation seat, includes the base, install installation cavity and annular chamber in the base, the base runs through fixedly connected with a plurality of communicating pipes, communicating pipe intercommunication installation cavity and annular chamber, the base roof runs through sliding connection has the traveller, the traveller is located the outside one end fixedly connected with roof of base, a plurality of heat conduction seats of base lateral wall fixedly connected with, the heat conduction seat runs through sliding connection has the friction bar, fixedly connected with memory metal between heat conduction seat and the roof, the sliding plate has been cup jointed in the installation cavity to sealed slip, the traveller is located the one end of installation cavity with sliding plate fixedly connected with, annular chamber sealed slip has cup jointed the annular plate, fixedly connected with buffer spring between annular plate and the annular chamber inner bottom, the packing has magnetorheological suspensions between annular plate and the sliding plate, surface fixedly connected with first electro-magnet under the sliding plate.
In the shape memory alloy-based aviation seat energy absorbing device, the lower surface of the base and the upper surface of the top plate are fixedly connected with the buffer piece, a delay switch is arranged on the upper surface of the base, and the delay switch is electrically connected with the first electromagnet through a wire.
In the shape memory alloy-based aero seat energy absorber, a sand grinding layer is arranged on the side wall of the friction rod, and the heat conduction seat is made of copper-tin alloy materials.
In the above-mentioned aviation seat energy-absorbing device based on shape memory alloy, the installation intracavity is provided with three and makes magnetorheological fluid evenly distributed's stirring mechanism, stirring mechanism includes the fixed plate, the fixed plate runs through the bearing and rotates to be connected with the pivot, the installation intracavity diapire is connected with three threaded rod through the bearing rotation, threaded rod and sliding plate threaded connection, the pivot with correspond the threaded rod passes through one-way bearing and rotates to be connected, installation intracavity inside wall fixedly connected with a plurality of arc pinion rack, the pivot lateral wall is connected with a plurality of puddlers through the bearing rotation, the one end interference fit that the pivot was kept away from to the puddler has the stirring gear, stirring gear and the meshing of corresponding arc pinion, puddler lateral wall fixedly connected with a plurality of stirring leaves.
In the shape memory alloy-based aviation seat energy absorber, the thread rise 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 position of the threaded rod and the sliding plate.
In the shape memory alloy-based aero seat energy absorbing device, three groups of stirring mechanisms are symmetrically arranged, and the included angle between each group is 120 degrees.
In the shape memory alloy-based aero seat energy absorber, the side wall of the base is provided with the power generation mechanism for generating power, the power generation mechanism comprises two generators, the generators are embedded in the side wall of the base, the input ends of the generators are in interference fit with rotating gears, the bottom ends of the friction bars are fixedly connected with a follow-up plate together, the lower surface of the follow-up plate is fixedly connected with two racks, and the racks are meshed with the corresponding rotating gears.
In the shape memory alloy-based aviation seat energy absorber, the adjusting cavity is formed in the base, the second electromagnet is fixedly connected to the inner side wall of the adjusting cavity and is electrically connected with the generator through a wire, the conducting plate is slidably connected to the inner bottom wall of the adjusting cavity, the reset spring is fixedly connected between the conducting plate and the inner side wall of the adjusting cavity, the resistor coil is fixedly connected to the inner side wall of the adjusting cavity, the conducting plate is in contact with the resistor coil, and the conducting plate, the resistor coil, the first electromagnet and the delay switch are electrically connected through the wire.
In the shape memory alloy-based aviation seat energy absorber, the inner bottom wall of the adjusting cavity is provided with the guide groove, the section of the guide groove is T-shaped, the T-shaped guide block is connected in a sliding manner in the guide groove, and the T-shaped guide block is fixedly connected with the conductive plate.
Compared with the prior art, the invention has the advantages that:
1. in the first embodiment, when the impact is applied, heat is generated by friction between the friction rod and the heat conduction seat, so that the memory metal is deformed, and when the impact is reset, the force of the original shape is recovered through the memory metal, and the impact force of the part is buffered and 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 descends, the sliding plate is driven to slide downwards through the sliding column, so that magnetorheological fluid in the annular cavity is pumped into the mounting cavity, and meanwhile, the delay switch is triggered, so that the first electromagnet is electrified to generate magnetic force, the magnetorheological fluid is increased in viscosity and reduced in fluidity under the action of the magnetic force, so that the damping of the magnetorheological fluid is larger in the process of sliding the sliding plate upwards to hydraulically return the magnetorheological fluid to the annular cavity, and the damping of the magnetorheological fluid is matched with the restoring force of the memory metal and the elasticity of the spring, so that the buffering effect is further improved, and the safety of astronauts is effectively ensured;
3. in the second embodiment, the sliding plate slides downwards, and the stirring rod drives the stirring blade to revolve around the rotating shaft and rotate simultaneously through the arrangement of the threaded rod, the rotating shaft and other structures, so that magnetorheological fluid is stirred through the stirring blade, so that the magnetorheological fluid is distributed more uniformly, damping generated by the magnetorheological fluid under magnetic force is more uniform, and the buffering stability is improved;
4. in the third embodiment, in the flying process of the spacecraft, the generated jolt can enable the top plate to vibrate up and down continuously, and through the arrangement of the racks, the rotating gears and the generator, the rotating gears are driven to rotate through the racks while jolt is buffered, and the generator is used for generating electricity, so that generated electric energy is stored for standby, and more energy is saved;
5. in the third embodiment, the current generated by the generator is related to the rotation speed of the rotating gear, and the rotation 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 conducting 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, namely the magnitude of damping generated by the magnetorheological fluid, is changed, and therefore the damping device can automatically adjust the magnitude of the buffering damping according to the magnitude of the impact force, is more intelligent, and has higher riding comfort for astronauts.
Drawings
FIG. 1 is a schematic view of an embodiment of an energy absorber for an aero seat based on shape memory alloy according to the present invention;
FIG. 2 is a schematic structural view of an embodiment of an energy absorber for an aero seat based on shape memory alloy according to the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of an energy absorber for an aero seat based on shape memory alloy according to the present invention;
fig. 4 is an enlarged view at a in fig. 3;
FIG. 5 is a schematic structural view of an agitation mechanism in a second embodiment of an energy absorbing device for an aero seat based on shape memory alloy according to the present invention;
FIG. 6 is a schematic view of an embodiment of an energy absorber for an aero seat based on shape memory alloy according to the present invention;
FIG. 7 is a schematic structural diagram of a third embodiment of an energy absorber for an aero seat based on shape memory alloy according to the present invention;
FIG. 8 is an enlarged view at B in FIG. 7;
fig. 9 is a schematic circuit connection diagram of a third embodiment of an energy absorbing device for an aero seat based on a shape memory alloy according to the present invention.
In the figure: 1 base, 101 buffer piece, 2 installation cavity, 201 sliding column, 202 roof, 203 heat conduction seat, 204 friction rod, 205 sliding plate, 206 annular cavity, 207 annular plate, 208 buffer spring, 209 communicating pipe, 210 magnetorheological fluid, 211 first electro-magnet, 212 delay switch, 213 memory metal, 3 follow-up plate, 301 generator, 302 rotation gear, 303 rack, 4 fixed plate, 401 pivot, 402 threaded rod, 403 puddler, 404 stirring gear, 405 arc toothed plate, 406 stirring vane, 5 regulation cavity, 501 second electro-magnet, 502 resistance coil, 503 current-conducting plate, 504 reset spring, 6 guide slot, 601T shape guide block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Example 1
Referring to fig. 1-3, an aero seat energy absorbing device based on shape memory alloy comprises a base 1, wherein 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, a sliding column 201 is arranged on the top wall of the base 1 in a penetrating manner in a sliding manner, a sealing gasket is arranged at the sliding connection position of the sliding column 201 and the top wall of the base 1, the sealing performance of the mounting cavity 2 is ensured, a top plate 202 is fixedly connected to one end of the sliding column 201 outside the base 1, a plurality of heat conducting seats 203 are fixedly connected to the side wall of the base 1, friction bars 204 are arranged in a penetrating manner in the heat conducting seats 203 in a penetrating manner, memory metal 213 is fixedly connected between the heat conducting seats 203 and the top plate 202, the memory metal 213 can stretch after being heated, so that after heat generated by friction between the friction bars 204 and the heat conducting seats 203 is led to the memory metal 213, the memory metal 213 can stretch, and when impact is finished, the force generated by restoring the memory metal 213 can effectively buffer the impact force, offset the upward impact force of part of the top plate 202, thereby buffering the impact force, the sliding plate 205 is sleeved in the installation cavity 2 in a sealing sliding way, one end of the sliding column 201 positioned in the installation cavity 2 is fixedly connected with the sliding plate 205, the annular plate 207 is sleeved in the annular cavity 206 in a sealing sliding way, 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 increases under a magnetic field, the viscosity changes along with the change of the magnetic field, the lower surface of the sliding plate 205 is fixedly connected with the first electromagnet 211, during impact, the sliding plate 205 pumps the magnetorheological fluid 210 in the annular cavity 206 into the installation cavity 2 through the communicating pipe 209, and in the sliding process, the 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, and at the moment, the resistance of the sliding plate 205 for pumping the magnetorheological fluid 210 back to the annular cavity 206 is increased, so that the impact force of upward movement of the top plate 202 is buffered through the resistance, and the sliding plate is matched with the memory metal 213, so that the impact force is greatly buffered, and the safety of a astronaut 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 after the delay switch 212 is triggered, the circuit is automatically disconnected after being electrified for a period of time, which is the prior art and is not described herein, 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 abrasive layer, and the setting on abrasive layer makes friction stick 204 and heat conduction seat 203 friction can be better produce the heat, and heat conduction seat 203 is made for copper-tin alloy material, and copper-tin alloy still has better wearability when having good heat conductivity, 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 rubs against the heat conducting seat 203, the heat conducting seat 203 generates heat, the heat is transferred to the memory metal 213, the memory metal 213 is heated and stretched, part of the impact force is counteracted, meanwhile, the sliding column 201 drives the sliding plate 205 to slide downwards, magnetorheological fluid 210 in the annular cavity 206 is pumped into the mounting cavity 2 through the communicating pipe 209, and when the top plate 202 slides downwards, the delay switch 212 is triggered, so that the first electromagnet 211 is electrified to generate magnetic force;
when the top plate 202 is lifted up after receiving the impact force, the magnetic force generated by the first electromagnet 211 increases the viscosity of the magnetorheological fluid 210, and the fluidity is reduced, so that the resistance when the magnetorheological fluid 210 in the installation cavity 2 is pumped back to the annular cavity 206 by lifting up the sliding plate 205 is increased, at the moment, the temperature of the memory metal 213 is reduced, the memory metal 213 recovers to be contracted, and the impact force generated when the top plate 202 is lifted up is offset greatly by the resistance of the magnetorheological fluid 210 and the force of the memory metal 213, so that the impact force is buffered effectively, and the safety of astronauts is ensured.
Example two
Referring to fig. 3 to 5, this embodiment differs from the first embodiment in that: stirring magnetorheological fluid 210, make its distribution even, produce even resistance, be provided with three stirring mechanism that makes magnetorheological fluid 210 evenly distributed in the installation cavity 2, stirring mechanism includes fixed plate 4, fixed plate 4 runs through the rotation through bearing and is connected with pivot 401, the interior bottom wall of installation cavity 2 is connected with three threaded rod 402 through the bearing rotation, threaded rod 402 and sliding plate 205 threaded connection, pivot 401 and corresponding threaded rod 402 pass through the one-way bearing rotation to be connected, the setting of one-way bearing makes the sliding plate 205 drive threaded rod 402 rotate can make threaded rod 402 drive pivot 401 rotate when descending, and when retrieving, threaded rod 402 counter-rotating can only take place relative rotation with pivot 401, can not drive its rotation, because the magnetorheological fluid 210 viscosity has increased when the back rises, stirring resistance is great at this moment, the stirring can influence the normal back-up of sliding plate 205 again, installation cavity 2 fixedly connected with a plurality of arc pinion racks 405, arc pinion racks 405 upper surface is provided with the tooth and meshes with corresponding stirring gear 404, pivot 401 lateral wall is connected with a plurality of puddler 403 through the bearing rotation, the one end that stirring rod 403 kept away from pivot 401 is moved away from and is crossed with stirring gear 404, a plurality of stirring impeller racks 404 are connected with a plurality of stirring impeller racks 404.
The screw 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-locking, the lifting of the sliding plate 205 can drive the threaded rod 402 to rotate, a sealing gasket is arranged at the threaded connection position of the threaded rod 402 and the sliding plate 205, leakage at the threaded connection position is avoided, 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 impact sliding plate 205 is lowered to draw the magnetorheological fluid 210 into the installation 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, and simultaneously, the stirring gear 404 drives the stirring rod 403 to rotate through the meshing of the stirring gear 404 and the arc toothed plate 405, so that the stirring rod 403 revolves around the rotating shaft 401, and rotates by itself, so that the stirring blade 406 revolves around the rotating shaft 401 and rotates together with the stirring rod 403, and the magnetorheological fluid 210 in the installation cavity 2 is stirred through the rotation of the stirring blade 406, so that the suspended matters in the magnetorheological fluid 210 are uniformly distributed, the viscosity of the magnetorheological fluid 210 is uniform under a magnetic field, and the generated resistance is uniform, so that the lifting of the sliding plate 205 is ensured.
Example III
Referring to fig. 6 to 9, this embodiment differs from the first embodiment in that: generating electricity through generator mechanism, simultaneously adjust the resistance size, base 1 lateral wall is provided with the generating mechanism that is used for generating electricity, generating mechanism includes two generators 301, generator 301 can produce the electric energy through rotating to carry to the battery picture in not drawing store, generator 301 inlays and establishes in base 1 lateral wall, generator 301's input interference fit has rotation gear 302, the common fixedly connected with follower plate 3 of friction stick 204 bottom, follower plate 3 is annular structure, cup joint with base 1 slip, the fixed surface is connected with two racks 303 under the follower plate 3, rack 303 meshes with corresponding rotation gear 302.
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 bottom wall of the adjusting cavity 5, a reset spring 504 is fixedly connected between the conductive plate 503 and the inner side wall of the adjusting cavity 5, a resistor coil 502 is fixedly connected to the inner side wall of the adjusting cavity 5, the conductive plate 503 is in contact with the resistor coil 502, the conductive plate 503, the resistor coil 502, the first electromagnet 211 and the delay switch 212 are electrically connected through the wire, the connection relation of the conductive plate 503, the resistor coil 502, the first electromagnet 211 and the delay switch 212 is shown in fig. 9, so that the magnetic force generated by the second electromagnet 501 can control the position of the conductive plate 503, the resistance of the resistor coil 502 connected to the first electromagnet 211 is controlled according to the impact force, and the resistance of the magnetorheological fluid 210 is controlled.
Guide slot 6 has been seted up to bottom wall in the regulation chamber 5, and the cross-section of guide slot 6 is the T font, and sliding connection has T shape guide block 601 in guide slot 6, and T shape guide block 601 and current conducting plate 503 fixed connection, the guide slot 6 of T shape and the cooperation of T shape guide block 601 make the motion of current conducting plate 503 more steady, avoid its and resistance coil 502 break away from.
In this embodiment, when the top plate 202 is subjected to the downward impact force or jolt to vibrate up and down continuously, the follower plate 3 is driven to descend and rise together, so that the rotating gear 302 is driven to rotate through the engagement of the rack 303 and the gear 302 of the rotating gear 302, and the generator 301 is used for generating electricity, and the storage is performed through the storage battery, so that the energy is saved;
when the impact force is received, the movement speed of the follow-up plate 3 is related to the impact force, the movement speed of the follow-up plate 3 determines the rotation speed of the rotating gear 302, namely, determines the current generated by the generator 301 when generating electricity, so that the magnetic force generated by the second electromagnet 501 is related to the impact force, the position where the conducting plate 503 contacts 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 conducting plate 503 is larger, so that the conducting plate 503 slides towards the second electromagnet 501, the resistance of the resistance coil 502 connected with the first electromagnet 211 is smaller, the magnetic force of the first electromagnet 211 is larger, the viscosity of the magnetorheological fluid 210 is increased, and the pumping back resistance is increased, otherwise, when the impact force is smaller, the magnetic force of the first electromagnet 211 is smaller, the viscosity of the magnetorheological fluid 210 is relatively smaller, so that the damping size can be automatically adjusted according to the impact force, the damping force is more intelligent, and the comfort of a space person is higher.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides an energy-absorbing device based on shape memory alloy aviation seat, includes base (1), its characterized in that, install chamber (2) and annular chamber (206) have been seted up in base (1), a plurality of communicating pipes (209) of fixedly connected with are run through to base (1), communicating pipe (209) intercommunication install chamber (2) and annular chamber (206), base (1) roof run through sliding connection has post (201), the one end fixedly connected with roof (202) that post (201) are located the outside of base (1), base (1) lateral wall fixedly connected with a plurality of heat conduction seat (203), heat conduction seat (203) run through sliding connection has friction rod (204), fixedly connected with memory metal (213) between heat conduction seat (203) and roof (202), install chamber (2) inner seal sliding sleeve has sliding plate (205), the one end that post (201) are located install chamber (2) with sliding plate (205) fixedly connected with, annular chamber (206) inner seal sliding sleeve has annular plate (207), annular plate (208) and annular chamber (205) inner bottom (205) are connected with annular buffer (210) fixedly between a plurality of annular chamber (205), the lower surface of the sliding plate (205) is fixedly connected with a first electromagnet (211);
the lower surface of the base (1) is fixedly connected with the upper surface of the top plate (202) and is provided with a buffer piece (101), the upper surface of the base (1) is provided with a time delay switch (212), and the time delay switch (212) is electrically connected with the first electromagnet (211) through a lead;
three groups of stirring mechanisms which enable magnetorheological fluid (210) to be uniformly distributed are arranged in the installation cavity (2), each stirring mechanism comprises a fixed plate (4), each fixed plate (4) is connected with a rotating shaft (401) through bearing penetration rotation, three threaded rods (402) are rotatably connected to the inner bottom wall of the installation cavity (2) through bearings, each threaded rod (402) is in threaded connection with a sliding plate (205), each rotating shaft (401) is rotatably connected with the corresponding threaded rod (402) through a one-way bearing, a plurality of arc 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 each rotating shaft (401) through bearings, one ends, far away from the corresponding rotating shafts (401), of the stirring rods (403) are in interference fit with stirring gears (404), each stirring gear (404) is meshed with the corresponding arc toothed plates (405), and a plurality of stirring blades (406) are fixedly connected to the side walls of the stirring rods (403).
The power generation device comprises a base (1), wherein 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), rotating gears (302) are in interference fit with the input ends of the power generators (301), a follow-up plate (3) is fixedly connected to the bottom ends of friction rods (204) together, two racks (303) are fixedly connected to the lower surface of the follow-up plate (3), and the racks (303) are meshed with the corresponding rotating gears (302);
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 reset spring (504) is fixedly connected between the conductive plate (503) and the inner side wall of the adjusting cavity (5), a resistor coil (502) is fixedly connected to the inner side wall of the adjusting cavity (5), the conductive plate (503) is in contact with the resistor coil (502), and the conductive plate (503), the resistor coil (502), the first electromagnet (211) and the time delay switch (212) are electrically connected through wires.
2. The shape memory alloy-based aero seat energy absorbing device according to claim 1, wherein a frosted layer is arranged on the side wall of the friction rod (204), and the heat conducting seat (203) is made of copper-tin alloy material.
3. The shape memory alloy-based aero seat energy absorbing device according to claim 2, wherein the thread lead angle of the threaded rod (402) is larger 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).
4. A shape memory alloy based aero seat energy absorbing device as claimed in claim 3, wherein three sets of said agitating means are symmetrically arranged, each set having an included angle of 120 °.
5. The shape memory alloy-based aero seat energy absorbing device according to claim 4, 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 connected in the guide groove (6) in a sliding mode, and the T-shaped guide block (601) is fixedly connected with the conductive plate (503).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111041001.7A CN113562180B (en) | 2021-09-07 | 2021-09-07 | Aviation seat energy absorbing device based on shape memory alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP2015112929A (en) * | 2013-12-10 | 2015-06-22 | 須知 晃一 | Manufacturing method and components of flying body for individual's aerial work |
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| KR101778635B1 (en) * | 2016-03-16 | 2017-09-14 | 조선대학교산학협력단 | The calibration mechanism for dual function of launch lock and fail safe |
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