CN106395672A - Magneto-rheological effect-based elevator braking device with automatic protection function and elevator braking method - Google Patents
Magneto-rheological effect-based elevator braking device with automatic protection function and elevator braking method Download PDFInfo
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- CN106395672A CN106395672A CN201611160603.3A CN201611160603A CN106395672A CN 106395672 A CN106395672 A CN 106395672A CN 201611160603 A CN201611160603 A CN 201611160603A CN 106395672 A CN106395672 A CN 106395672A
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- Prior art keywords
- permanent magnet
- magnetic
- end cap
- magnet
- turnbarrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
- B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists
Abstract
The invention provides a magneto-rheological effect-based elevator braking device with the automatic protection function and an elevator braking method. The device adopts a structure combining a permanent magnet and common magnet exciting coils. On the normal operation condition, the braking torque of a brake is controlled by controlling currents of the magnet exciting coils, on the emergency conditions, the permanent magnet can move towards the direction of magneto-rheological fluid under the pressure of a reset spring by cutting off compressed air entering a permanent magnet-air inlet cylinder, and therefore a magnetic field of the permanent magnet can be exerted on the magneto-rheological fluid, then the braking torque can be generated and the braking effect can be realized. According to the magneto-rheological effect-based traction elevator braking device, an internal cooling liquid flow channel is used for dissipating heat, the magneto-rheological fluid can be maintained within a low temperature range, and good control performance and good stability performance can be obtained. The magneto-rheological effect replaces an original mechanical brake, and therefore control over the braking device is simple and reliable.
Description
Technical field
The present invention relates to a kind of towed elevator brake unit based on magnetic rheology effect and method, particularly to adopting permanent magnetism
Body and coil are applied to towed elevator brake unit and the method for magnetic flow liquid as excitation unit.
Background technology
Elevator is a kind of vertical conveyor with motor as power, can be used for tier building and takes advantage of people or the fortune of carrying goods
Defeated instrument.With the fast development of skyscraper, the demand of elevator is increasing, and high performance elevator technology improves people
Work efficiency and lived experience.Elevator belongs to special equipment, must ensure its security performance in use, also need simultaneously
Comfortableness to be met, energy-conserving and environment-protective, the demand of the low aspect of noise, but current electromagnetic type towed elevator brake exists
Shortcoming such as mechanical wear, vibratory impulse, noise height etc..Magnetic flow liquid is a kind of novel intelligent material, is by having magnetic conductivity
Magnetic-particle is dissolved in, by additive dispersion, the suspension formed in non-magnetic basal liquid.Under being acted on by externally-applied magnetic field,
There is high shear yield stress, and be subject to magnetic field intensity to strengthen and strengthen, and when no externally-applied magnetic field acts on, extensive in several milliseconds
Restore this low viscous state, there is conversion change procedure reversible rapidly.According to the characteristic of magnetic rheology effect, magnetorheological in recent years
Liquid is widely used in the research of New Brake, and is provided with good application prospect, and magnetic converting technique is applied to drag
Draw elevator brake and there is novelty and feasibility.
At present, magnetic rheological brake is mostly disk brake（For example refer to Chinese patent CN201310393903.6, beautiful
State patent US20120211315 A1）, it is filled between stator and rotor using magnetic flow liquid, by stepless action in magnetorheological
The magnetic field in liquid gap makes magnetic flow liquid produce shear yield stress, thus producing braking moment.In former magnetorheological towed elevator
In brake（Refer to Chinese patent CN201310420595.1, entitled " the elevator traction clutch and brake based on magnetic rheology effect
System and method and device "）, magnetic rheological brake device adopts the brake of two coil configuration design, according to elevator brake
Device service condition, needs to consider the safety of in emergency circumstances elevator, this patent adds permanent magnet device, to ensure in urgent feelings
Under condition, magnetic rheological brake also has braking moment.Meanwhile, in original magnetic rheological brake, do not design coolant radiating
Runner, brake, in braking procedure, is converted to heat energy by mechanical energy, leads to magnetic flow liquid temperature to raise, so cooling radiating
It is necessary.According to Chinese patent CN203702929U, entitled " a kind of water-cooled magnetic rheological brake ", using in two side ends
Cover processing effluent trough, radiated by water circulation, but because cooling liquid flowing channel and magnetic flow liquid are apart from larger, carrying out
In braking procedure, magnetic flow liquid is in higher temperature, and cooling effect is unsatisfactory, in this magnetic rheological brake, adds
Internal coolant runner carries out coolant radiating, has more preferable cooling heat transferring effect.
Content of the invention
The purpose of invention is to provide a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect,
It has, and exciting current is little, and coil heating is low, braking moment is big, low speed braking ability is good, braking moment controllability is good, structure is simple
List, the magnet structure of automatic protection, the feature of cooling liquid flowing channel.
For achieving the above object, technical program of the present invention lies in：A kind of have automatic protection based on magnetic rheology effect
The brake device for elevator of function, including rotor assembly and field frame assembly, rotor assembly is fixed on field frame assembly by bearing, institute
State rotor assembly and include brake axle and turnbarrel；Described field frame assembly include rotary shaft end cap, excitation structure, outside end cap-
Permanent magnet, magnet structure and base；Excitation structure side is fixedly connected with outside end cap-permanent magnet, opposite side and rotation
Hubcap is fixedly connected, and forms gap with the turnbarrel of rotor assembly；Magnet structure is connect with rotor assembly by bearing
Touch, and be fixed on field frame assembly by outside end cap-permanent magnet；Described rotary shaft end outer side of lid is provided with import and export water end (W.E.)
End cap；Magnetic flow liquid is filled between described rotor assembly and field frame assembly.
Further, described rotation suit includes turnbarrel-go up, turnbarrel-in, turnbarrel-under；Rotary sleeve
Cylinder-middle one end, turnbarrel-lower one end offer inlet opening respectively；3 sleeves are nested successively；Coolant is passed through to pass in and out saliva
The water inlet of end end cap, flows through inside brake axle；By turnbarrel-in inlet opening reach turnbarrel-upper and rotary sleeve
Cylinder-intermediate gap, carries out cooling heat transferring, afterwards pass through turnbarrel-in turnbarrel-lower gap, by turnbarrel-under
Inlet opening flows into brake axle；Eventually pass the outlet outflow importing and exporting water end (W.E.) end cap.
Further, excitation structure includes two groups of axially distributed excitation coil structures, excitation coil structure includes encouraging
Magnetic coil, yoke-in, magnetism-isolating loop, yoke-side；Described magnet exciting coil be arranged at yoke-in, with yoke-side outside magnet exciting coil
Connect, magnet exciting coil bottom is connected with magnetism-isolating loop upper end；One yoke-side is fixedly connected with rotary shaft end cap, another yoke-side with
Outside end cap-permanent magnet is fixedly connected；Between yoke-middle bottom, yoke-side bottom, the magnetism-isolating loop other end and turnbarrel are formed
Gap；This gap is filled with magnetic flow liquid；Two magnet exciting coil winding modes are on the contrary so that the magnetic field of two magnet exciting coil generations is mutual
Superimposed, the magnetic line of force, around magnet exciting coil, bypasses magnetism-isolating loop so that magnetic induction line passes through magnetic flow liquid and turnbarrel simultaneously,
Magnetic induction line is around magnet exciting coil, and bypasses magnetism-isolating loop through magnetic flow liquid, forms the magnetic strength line loop of closure, through magnetic current
Become the magnetic induction line of liquid, lead to magnetic flow liquid to produce magnetic rheology effect, and then make magnetic flow liquid that magnetic rheology effect and then generation to occur
Braking moment；By controlling the electric current being passed through magnet exciting coil, control magnetic field intensity produced by magnet exciting coil, and then control braking
The braking moment of device.
Further, described magnet structure include permanent magnet-cylinder body, permanent magnet-guide ring, permanent magnet-outside end cap,
Permanent magnet-air inlet cylinder, guide runner, permanent magnet-bearing (ball) cover, permanent magnet-movement end cap, permanent magnet-movable sleeving, permanent magnetism
Body and back-moving spring；
Permanent magnet-cylinder body and permanent magnet-guide ring pass through to be fixed on the end cap-permanent magnet of outside；Permanent magnet-cylinder body both sides are respectively
Connect permanent magnet-outside end cap and permanent magnet-bearing (ball) cover；Permanent magnet-bearing (ball) cover is connected with brake axle by bearing；Permanent magnetism
Body-outside end cap is connected with permanent magnet-air inlet cylinder；It is fixed with permanent magnet on described permanent magnet-movable sleeving；Back-moving spring one end
It is connected with permanent magnet-outside end cap, the other end is connected with permanent magnet-movable sleeving；Permanent magnet, permanent magnet-movement end cap and permanent magnetism
Body-movable sleeving constitutes a piston, permanent magnet-movement end cap with and permanent magnet-movable sleeving be connected；Permanent magnet-movable sleeving leads to
Cross and move sealing ring and permanent magnet-air inlet cylinders contact；By compressed air is passed through permanent magnet-air inlet cylinder, piston is past
Permanent magnet-outside end cap moves, and the magnetic field that now permanent magnet produces will not act on magnetic flow liquid, when cut-out be passed through permanent magnet-
The compressed air of air inlet cylinder, permanent magnet piston will be resetted by spring, and permanent magnet-cylinder body effect is passed through in the magnetic field of permanent magnet
On magnetic flow liquid, and then produce braking moment.
Further, described outside end cap-permanent magnet is connected with permanent magnet-cylinder body；Junction is provided with a pressure bullet
Spring；Compression spring one end is connected with outside end cap-permanent magnet, and the compression spring other end is connected with pressure compensation ring one end；Pressure
Compensate the ring other end to be connected with turnbarrel；Outside end cap-permanent magnet compensates dress with pressure compensation ring, compression spring decomposition pressure
Put.
Further, described magnet structure is made up of 4 pieces of contrary permanent magnets of magnetizing direction, and respectively 2 to the side of magnetizing
To contrary Nd-Fe-B permanent magnet material.
A kind of elevator brake method with automatic protection functions based on magnetic rheology effect, provide one above-mentioned based on magnetic
The brake device for elevator with automatic protection functions of rheological effect, the brake axle of described magnetic current changing brake device passes through shaft coupling
It is connected with worm screw, described worm screw is connected with motor by shaft coupling, described elevator brake system is controlled by controller,
Described controller inputs multiple signals, including motor overheating signal, code device signal, magnetic flow liquid temperature signal, rate signal,
Limit switch signal, power-off signal and other signals；Described controller exports four road signals, and the motor control signal of the first via leads to
Cross motor driver and rotating speed control is carried out to motor；The compressor control signal on the second tunnel passes through to control the air pressure of air compressor
Position control is carried out to permanent magnet；3rd road magnet exciting coil control signal passes through the electric current of control input DC source, by direct current
Power input magnet exciting coil is controlled to magnetorheological towed elevator brake unit braking moment；The coolant circulation control on the 4th tunnel
Signal processed passes through to control the water pump cooling liquid speed of chiller, controls water pump that coolant is flowed into intake-outlet end end cap, leads to
Supercooling liquor stream road carries out cooling heat transferring to control the temperature of magnetic flow liquid to magnetorheological towed elevator brake unit.
Further, electric current is created by magnet exciting coil and is looped around magnet exciting coil magnetic field, due to the electric current of magnet exciting coil
In opposite direction, make magnetic direction produced by magnet exciting coil contrary, magnetic field is overlapped mutually；Magnetic field passes through magnetic flow liquid, makes magnetic current
Become liquid and magnetic rheology effect occurs, the apparent viscosity of magnetic flow liquid there occurs change, when magnetic field intensity reaches a certain marginal value, magnetic
Rheology liquid stop flowing and reach solidification, there is certain anti-shear ability, by shear stress act on turnbarrel-
On, reach the effect of braking；
Compressed air is generated by permanent magnet-air inlet cylinder by air compressor and enters in magnet structure, by permanent magnet to
The outer side shifting of turnbarrel；Permanent magnet-cylinder body is passed through in the magnetic field that now permanent magnet produces, and magnetic flow liquid is not impacted, when
In case of emergency, closed the input of air compressor by described controller, magnet structure is under the pressure of back-moving spring
Move to the inside of turnbarrel, the magnetic field that now permanent magnet produces by permanent magnet-cylinder body pass through magnetic flow liquid and turnbarrel-
Under, by the shear stress that magnetic field of permanent magnet causes act on turnbarrel-under, reach the effect of braking.
Further, described DC source is produced through commutator by elevator power supply.
Compared with prior art, it is an advantage of the current invention that：
1st, in this magnetorheological towed elevator brake unit, employ the structure that permanent magnet is combined with common magnet exciting coil.?
Under normal operation, according to controlling field coil current come the braking moment of control brake, in case of emergency, by cutting
The disconnected compressed air entering permanent magnet-air inlet cylinder, can make permanent magnet under the pressure of back-moving spring, toward magnetic flow liquid direction
Mobile, thus the action of a magnetic field realizing permanent magnet in magnetic flow liquid and then produces the effect that braking moment reaches braking.
2nd, in this magnetorheological towed elevator brake unit, radiated using internal coolant runner.Coolant is by entering
Water inlet on port of export end cap flows into brake, by the runner of brake axle internal unique design, coolant is transported to rotation
On sleeve, and the heat being produced magnetic flow liquid in braking procedure by way of cooling heat transferring is taken away, and last coolant is passed through
Outlet flow flows out.By above radiating mode, magnetic flow liquid can be made to be maintained within the scope of relatively low temperature so as to have good
Good control performance and stability.
3rd, instead of original mechanical brake using magnetic rheology effect, magnetic flow liquid can be by Newtonian liquid in several milliseconds
Body become the class solid with high shear yield stress so that magnetic flow liquid towed elevator brake unit to have a response time short,
Reach the purpose of control braking moment by the electric current of control magnet exciting coil and then the shear yield stress of control magnetic flow liquid,
This brake unit is made to control simple and reliable.Magnetic flow liquid belongs to fluid brake in braking procedure, does not have traditional traction braking
Strong noise, mechanical wear and impact are big, and it has braking moment steadily and continuously adjustabe is it is easy to control, and braking impact is little, makes an uproar
Sound is little, the low feature of energy expenditure.The magnet exciting coil of magnetorheological towed elevator brake unit adopts two coil configuration, has magnetic strength
Answer intensity big, more uniform in magnetic flow liquid gap distribution.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the left view of the embodiment of the present invention.
Fig. 3 flows to schematic diagram for cooling passage.
Fig. 4 is permanent magnet magnetizing direction schematic diagram.
Fig. 5 is excitation unit magnetic line of force distribution schematic diagram.
Fig. 6 is permanent magnet device compressed air flowing schematic diagram.
Fig. 7 is the schematic diagram of the magnetorheological brakes of towed elevator based on the present invention.
Wherein：1.O type sealing ring；2. permanent magnet-cylinder body；3. permanent magnet-guide ring；4. guide runner；5. permanent magnet-outer
Side end cap；6 permanent magnets；7. permanent magnet-movement end cap；8. permanent magnet-movable sleeving；9. hexagon socket head cap screw；10. permanent magnet-air inlet
Cylinder；11. back-moving springs；12. hexagon socket head cap screws；13. mobile sealing rings；14. hexagon socket head cap screws；15. permanent magnets-bearing end
Lid；16. magnetic flow liquids；17. bases；18.O type sealing ring；19. holding screws；20. holding screws；21. general flat keys；22.
Brake axle；23. rotatory sealings；24. intake-outlet end end caps；25. bearings 6011；26. lip-type packings；27. bearings 16010；
28. turnbarrels-under；29. turnbarrels-in；30. turnbarrels-on；31. rotary shaft end caps；32. hexagon socket head cap screws；33.
Magnet exciting coil；34. yokes-in；35. magnetism-isolating loops；36. yokes-side；37. outside end cap-permanent magnets；38. outer-hexagonal plug screws；
39.O type sealing ring；40. pressure compensation rings；41. compression springs；42. hexagon socket head cap screws；43. water inlets；44. outlets；45.
Motor；46. cars；47. leveling speed detection relay models；48. motor overheating signals；49. code device signals；50. power-off
Protection signal；51. limit relay signals；52. motor drivers；53. controllers；54. other signals；55. brake unit magnetic
Rheology liquid temp signal；56. DC sources；57. commutators；58. elevator power supplies；59. magnetorheological towed elevator brake units；
60. air compressors；61. chillers；62. temperature sensors；63. counterweights；64. worm screws；65. worm gears；66. shaft couplings.
Specific embodiment
In conjunction with the drawings and specific embodiments, explanation is further explained to the present invention.
The present invention provides a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect, including rotor
Assembly and field frame assembly, rotor assembly is fixed on field frame assembly by bearing, and described rotor assembly includes brake axle and rotation
Sleeve；Described field frame assembly includes rotary shaft end cap, excitation structure, outside end cap-permanent magnet, magnet structure and base；
Excitation structure side is fixedly connected with outside end cap-permanent magnet, and opposite side is fixedly connected with rotary shaft end cap, and and rotor assembly
Turnbarrel formed gap；Magnet structure is contacted with rotor assembly by bearing, and solid by outside end cap-permanent magnet
On field frame assembly；Described rotary shaft end outer side of lid is provided with import and export water end (W.E.) end cap；Described rotor assembly and field frame assembly
Between fill magnetic flow liquid.
As shown in figure 1, the present invention has the magnetorheological brake device for elevator of automatic protection functions, include brake axle 22,
Turnbarrel-lower 28, turnbarrel-in 29, turnbarrel-upper 30, rotary shaft end cap 31, intake-outlet end end cap 24, yoke-
Side 36, yoke-in 34, magnetism-isolating loop 35, outside end cap-permanent magnet 37, pressure compensation ring 40, compression spring 41, permanent magnet-outside
End cap 5, permanent magnet-cylinder body 2, permanent magnet-guide ring 3, guide runner 4, permanent magnet-air inlet cylinder 10, permanent magnet-bearing (ball) cover
15th, back-moving spring 11, permanent magnet 6, permanent magnet-movement end cap 7, permanent magnet-movable sleeving 8, base 17.Wherein, turnbarrel-under
28th, turnbarrel-in 29, turnbarrel-upper 30 and brake axle 22 form rotor assembly.It is fixed that rotor assembly is fixed on by bearing
On sub- assembly, field frame assembly by intake-outlet end end cap 24, rotary shaft end cap 31, excitation unit, outside end cap-permanent magnet 37,
Pressure compensation ring 40, spring 41, magnet structure, base 17 form.Wherein, magnet exciting coil by magnet exciting coil 33, yoke-in
34th, magnetism-isolating loop 35, yoke-side 36 form, fixing with rotary shaft end cap 31 by outside end cap-permanent magnet 37 and total with rotor
The turnbarrel becoming forms gap, is filled with magnetic flow liquid 16.Magnet structure is by permanent magnet-cylinder body 2, permanent magnet-guiding
Ring 3, permanent magnet-outside end cap 5, guide runner 4, permanent magnet-bearing (ball) cover 15, permanent magnet-movement end cap 7, permanent magnet-movement
Set 8, permanent magnet 6, spring 11 form, and magnet structure is contacted with rotor assembly by bearing 27, and pass through outside end cap-forever
Magnet 37 is fixed on field frame assembly.
As shown in figure 1, brake unit is provided with 4 outer-hexagonal plug screws 37, there is the function of liquid injection hole and steam vent.Braking
After device installs, outer-hexagonal plug screw 37 can be taken out, magnetic flow liquid 16 is uniformly filled in field frame assembly and rotor assembly
Gap in.
By two magnet exciting coils 33 be placed in yoke-in 34, outside is connected to two yoke-sides 36, and two magnetism-isolating loops 35
Composition excitation unit, and be fixed with rotary shaft end cap 31 and outside end cap-permanent magnet 37 respectively by hexagon socket head cap screw, lead to
Cross two contrary magnet exciting coils of winding mode 33 so that the magnetic field of two magnet exciting coil 33 generations is mutually superimposed, magnetic force wire loop
Around magnet exciting coil 33, bypass magnetism-isolating loop 35 so that magnetic induction line passes through magnetic flow liquid 16 and turnbarrel-upper 30, such as Fig. 5 simultaneously
Shown, magnetic induction line is around magnet exciting coil 33, and bypasses magnetism-isolating loop 35 through magnetic flow liquid 16, and the magnetic induction line forming closure returns
Road, through the magnetic induction line of magnetic flow liquid 16, leads to magnetic flow liquid 16 to produce magnetic rheology effect, and then makes magnetic flow liquid 16 that magnetic to occur
Rheological effect and then generation braking moment.
Magnet structure, outside is fixed on by hexagon socket head cap screw 14 by permanent magnet-cylinder body 2 and permanent magnet-guide ring 3
On the end cap-permanent magnet 37 of outside, permanent magnet-cylinder body 2 both sides connect permanent magnet-outside end cap 5 He respectively by hexagon socket head cap screw
Permanent magnet-bearing (ball) cover 15, permanent magnet-bearing (ball) cover 15 is connected with brake axle 22 by bearing 27, permanent magnet-outside end cap 5
It is connected with permanent magnet-air inlet cylinder 10 by hexagon socket head cap screw 9, inside is by permanent magnet 6, permanent magnet-movement end cap 7 and permanent magnetism
Body-movable sleeving 8 constitute a piston, permanent magnet-movement end cap 7 by hexagon socket head cap screw 9 with and permanent magnet-movable sleeving 8 be connected
Connect, and contacted with permanent magnet-air inlet cylinder 10 by mobile sealing ring 13, by compressed air is passed through permanent magnet-air inlet circle
Cylinder 10, permanent magnet piston is moved toward permanent magnet-outside end cap 5, and the magnetic field that now permanent magnet produces will not act on magnetorheological
Liquid 16, when cut-out is passed through the compressed air of permanent magnet-air inlet cylinder 10, permanent magnet piston will be resetted by spring 11, permanent magnetism
The magnetic field of body is acted on magnetic flow liquid 16 by permanent magnet-cylinder body 2, and then produces braking moment, to reach automatic protection
Function.As shown in figure 4, permanent magnet is divided into 4 pieces, the contrary Nd-Fe-B permanent magnet material of respectively 2 pairs magnetizing directions, the program can
Higher magnetic induction is had with guarantee magnetic flow liquid gap, and more uniform magnetic field distribution.
As shown in figure 1, in outer side end cap-permanent magnet 37, by 6 springs 41 and pressure compensation ring 40, and permanent magnet-
Cylinder body 2 forms a closed containing cavity, when magnetic flow liquid 16 in the course of the work, because centrifugal force and thermal expansion produce pressure
During power, pressure compensation can be carried out, improve the stationarity of braking procedure it is ensured that the reliability of device.
As shown in figure 3, according to magnetic flow liquid 16 in braking procedure, mechanical energy is converted into heat energy by brake unit, lead to
Magnetic flow liquid temperature raises, and the operating temperature range of magnetorheological fluid materials is -40 DEG C to 150 DEG C.Coolant is led to by water inlet 43
Enter, by importing and exporting water end (W.E.) end cap 24, flow through brake axle 22 inner inlet end cooling liquid flowing channel and reach turnbarrel-upper 30 and rotation
Rotaring sleeve-in 29 gaps, carry out cooling heat transferring, pass through afterwards turnbarrel-in 29 with turnbarrel-lower 28 gaps, flow into system
Moving axis 22 internal water side cooling liquid flowing channel, through importing and exporting water end (W.E.) end cap 24, is flowed out by outlet 44, is provided with brake axle
Holding screw 19, holding screw 20 and marine glue are to reach the effect of sealing.It is provided with cooling liquid flowing channel it is ensured that braking
During, magnetic flow liquid 16 may remain in relatively low working range it is ensured that magnetic flow liquid 16 has good magnetorheological effect
Answer, and brake unit has higher stability.
The present invention also provides a kind of elevator brake method with automatic protection functions based on magnetic rheology effect, controls
Principle is as shown in Figure 7.It includes the above-mentioned brake device for elevator with automatic protection functions based on magnetic rheology effect, described
The brake axle 22 of magnetic current changing brake device 59 is connected with worm screw 64 by shaft coupling 66, described worm screw 64 pass through shaft coupling 66 with
The output shaft of motor 45 is connected, and described worm screw 64 is connected with worm gear 65 and forms and form elevator with the traction sheave on worm gear 65
Carrying means, described worm gear 66 drives car 46 and counterweight 63 to be moved up and down, and described controller 53 gathers elevator information, bag
Include by the motor overheating signal 48 of motor 45 information input, code device signal 49, leveling speed detects relay model 47, broken
Electric protection signal 50, limit relay signal 51, gathered by the temperature sensor 62 in magnetorheological towed elevator brake unit 59
Brake unit magnetic flow liquid temperature signal 55, and other signals 54, and being controlled by controller 53, described controller
53 export four road signals, and that is, the motor control signal of the first via carries out rotating speed control by motor driver 52 to motor 45；The
The compressor control signal on two tunnels passes through to control the air pressure of air compressor 60 to carry out position control to permanent magnet 6；3rd tunnel is encouraged
Magnetic coil control signal passes through the electric current of control input DC source 56, and DC supply input magnet exciting coil 33 is draged to magnetorheological
Draw brake device for elevator 59 braking moment to be controlled, described DC source 56 is produced through commutator 57 by elevator power supply 58；
The coolant loop control signal on the 4th tunnel passes through to control the water pump cooling liquid speed of chiller 61, controls water pump by coolant
Flow into intake-outlet end end cap 24, cooling is carried out to magnetorheological towed elevator brake unit 59 by the cooling liquid flowing channel of Fig. 3 and changes
Heat is to control the temperature of magnetic flow liquid 16.
Operation principle：
Electric current creates, by magnet exciting coil 33, the magnetic field being looped around magnet exciting coil 33, due to the sense of current phase of magnet exciting coil 33
Instead, make magnetic direction produced by magnet exciting coil 33 contrary, magnetic field is overlapped mutually, as shown in figure 5, magnetic field passes through magnetic flow liquid
16, make magnetic flow liquid 16 that magnetic rheology effect to occur, the apparent viscosity of magnetic flow liquid 16 there occurs huge change, in magnetic field intensity
When reaching a certain marginal value, magnetic flow liquid 16 stops flowing and reaches solidification, has certain anti-shear ability, is cut by mangneto
Shearing stress acts on turnbarrel-upper 30, reaches the effect of braking.
Compressed air is generated by permanent magnet-air inlet cylinder 10 by air compressor 60 and enters in magnet structure, will
Permanent magnet 6 is to side shifting outside turnbarrel, as shown in fig. 6, permanent magnet-cylinder body 2 is passed through, no in the magnetic field that now permanent magnet 6 produces
Magnetic flow liquid 16 is impacted, when in case of emergency, such as controller 53 collects power-off protection signal 50, motor overheating
When signal 48 etc. needs to take brake hard, closed the input of air compressor 60 by described controller 53, magnet structure exists
Move to the inside of turnbarrel under the pressure of back-moving spring 11, the magnetic field that now permanent magnet 6 produces is worn by permanent magnet-cylinder body 2
Cross magnetic flow liquid 16 and turnbarrel-lower 28, by the shear stress that permanent magnet 6 magnetic field causes act on turnbarrel-under
28, reach the effect of braking.
It is more than presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, produced function is made
With without departing from technical solution of the present invention scope when, belong to protection scope of the present invention.
Claims (9)
1. a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect, total including rotor assembly and stator
Become, rotor assembly be fixed on field frame assembly by bearing it is characterised in that：Described rotor assembly includes brake axle and rotary sleeve
Cylinder；Described field frame assembly includes rotary shaft end cap, excitation structure, outside end cap-permanent magnet, magnet structure and base；
Excitation structure side is fixedly connected with outside end cap-permanent magnet, and opposite side is fixedly connected with rotary shaft end cap；Excitation structure
It is arranged on base；
Magnet structure is contacted with rotor assembly by bearing, and is fixed on field frame assembly by outside end cap-permanent magnet；
Described rotary shaft end outer side of lid is provided with import and export water end (W.E.) end cap；
Gap filling magnetic flow liquid between described rotor assembly and field frame assembly.
2. a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect according to claim 1,
It is characterized in that：Described rotation suit includes turnbarrel-go up, turnbarrel-in, turnbarrel-under；Turnbarrel-in one
End, turnbarrel-lower one end offer inlet opening respectively；3 sleeves are nested successively；Coolant is passed through to import and export water end (W.E.) end cap
Water inlet, flows through inside brake axle；By turnbarrel-in inlet opening reach turnbarrel-upper and turnbarrel-centre
Gap, carries out cooling heat transferring, afterwards pass through turnbarrel-in turnbarrel-lower gap, by turnbarrel-under inlet opening
Flow into brake axle；Eventually pass the outlet outflow importing and exporting water end (W.E.) end cap.
3. a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect according to claim 1,
It is characterized in that：Excitation structure includes two groups of axially distributed excitation coil structures, excitation coil structure includes magnet exciting coil,
Yoke-in, magnetism-isolating loop, yoke-side；
Described magnet exciting coil be arranged at yoke-in, be connected with yoke-side outside magnet exciting coil, magnet exciting coil bottom and magnetism-isolating loop
Upper end connects；By being fixedly connected with rotary shaft end cap, another yoke-side is fixing with outside end cap-permanent magnet even for one yoke-side
Connect；Yoke-middle bottom, yoke-side bottom, the magnetism-isolating loop other end and turnbarrel form gap；This gap is filled with magnetorheological
Liquid；
Two magnet exciting coil winding modes are contrary so that the magnetic field that produces of two magnet exciting coils is mutually superimposed, the magnetic line of force around
Magnet exciting coil, bypasses magnetism-isolating loop so that magnetic induction line passes through magnetic flow liquid and turnbarrel simultaneously, and magnetic induction line is in magnet exciting coil week
Enclose, and bypass magnetism-isolating loop and pass through magnetic flow liquid, form the magnetic strength line loop of closure, through the magnetic induction line of magnetic flow liquid, lead to
Magnetic flow liquid produces magnetic rheology effect, and then so that magnetic flow liquid magnetic rheology effect is occurred and then produce braking moment；By controlling
It is passed through the electric current of magnet exciting coil, control magnetic field intensity produced by magnet exciting coil, and then the braking moment of control brake.
4. a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect according to claim 1,
It is characterized in that：Described magnet structure includes permanent magnet-cylinder body, permanent magnet-guide ring, permanent magnet-outside end cap, permanent magnetism
Body-air inlet cylinder, guide runner, permanent magnet-bearing (ball) cover, permanent magnet-movement end cap, permanent magnet-movable sleeving, permanent magnet and
Back-moving spring；
Permanent magnet-cylinder body and permanent magnet-guide ring pass through to be fixed on the end cap-permanent magnet of outside；Permanent magnet-cylinder body both sides are respectively
Connect permanent magnet-outside end cap and permanent magnet-bearing (ball) cover；Permanent magnet-bearing (ball) cover is connected with brake axle by bearing；Permanent magnetism
Body-outside end cap is connected with permanent magnet-air inlet cylinder；
It is fixed with permanent magnet on described permanent magnet-movable sleeving；Back-moving spring one end is connected with permanent magnet-outside end cap, the other end
It is connected with permanent magnet-movable sleeving；
Permanent magnet, permanent magnet-movement end cap and permanent magnet-movable sleeving constitute a piston, permanent magnet-movement end cap and and permanent magnetism
Body-movable sleeving is connected；Permanent magnet-movable sleeving passes through mobile sealing ring and permanent magnet-air inlet cylinders contact；By sky will be compressed
Gas is passed through permanent magnet-air inlet cylinder, and piston is moved toward permanent magnet-outside end cap, and the magnetic field that now permanent magnet produces will not be made
For magnetic flow liquid, when cut-out is passed through the compressed air of permanent magnet-air inlet cylinder, permanent magnet piston will be resetted by spring,
The magnetic field of permanent magnet is acted on magnetic flow liquid by permanent magnet-cylinder body, and then produces braking moment.
5. a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect according to claim 4,
It is characterized in that：Described outside end cap-permanent magnet is connected with permanent magnet-cylinder body；Junction is provided with a compression spring；Pressure
Spring one end is connected with outside end cap-permanent magnet, and the compression spring other end is connected with pressure compensation ring one end；Pressure compensation ring is another
One end is connected with turnbarrel；Outside end cap-permanent magnet and pressure compensation ring, compression spring decomposition pressure compensation device.
6. a kind of brake device for elevator with automatic protection functions based on magnetic rheology effect according to claim 4,
It is characterized in that：Described magnet structure is made up of 4 pieces of contrary permanent magnets of magnetizing direction, and respectively 2 pairs magnetizing directions are contrary
Nd-Fe-B permanent magnet material.
7. a kind of elevator brake method with automatic protection functions based on magnetic rheology effect it is characterised in that：There is provided as weighed
Profit requires the brake device for elevator with automatic protection functions based on magnetic rheology effect described in 1, described magnetorheological braking dress
The brake axle put is connected with worm screw by a shaft coupling, and described worm screw is connected with motor by another shaft coupling；Described electricity
Terraced brakes is controlled by controller, and described controller inputs multiple signals, including motor overheating signal, encoder letter
Number, magnetic flow liquid temperature signal, rate signal, limit switch signal, power-off signal and other signals；Described controller output four
Road signal, the motor control signal of the first via carries out rotating speed control by motor driver to motor；The compressor control on the second tunnel
Signal processed carries out position control by controlling the air pressure of air compressor to permanent magnet；3rd road magnet exciting coil control signal is passed through
The electric current of control input DC source, by DC supply input magnet exciting coil to magnetorheological towed elevator brake unit braking moment
It is controlled；The coolant loop control signal on the 4th tunnel passes through to control the water pump cooling liquid speed of chiller, controls water pump
Coolant is flowed into intake-outlet end end cap, cooling heat transferring is carried out to magnetorheological towed elevator brake unit by cooling liquid flowing channel
To control the temperature of magnetic flow liquid.
8. the elevator brake method with automatic protection functions based on magnetic rheology effect according to claim 7, it is special
Levy and be：
Electric current is created by magnet exciting coil and is looped around magnet exciting coil magnetic field, because the sense of current of magnet exciting coil is contrary, makes to encourage
Magnetic direction produced by magnetic coil is contrary, and magnetic field is overlapped mutually；Magnetic field passes through magnetic flow liquid, so that magnetic flow liquid is occurred magnetorheological
Effect, the apparent viscosity of magnetic flow liquid there occurs change, and when magnetic field intensity reaches a certain marginal value, magnetic flow liquid stops flowing
And reach solidification, there is certain anti-shear ability, by shear stress act on turnbarrel-on, reach braking
Effect；
Compressed air is generated by permanent magnet-air inlet cylinder by air compressor and enters in magnet structure, by permanent magnet to
The outer side shifting of turnbarrel；Permanent magnet-cylinder body is passed through in the magnetic field that now permanent magnet produces, and magnetic flow liquid is not impacted, when
In case of emergency, closed the input of air compressor by described controller, magnet structure is under the pressure of back-moving spring
Move to the inside of turnbarrel, the magnetic field that now permanent magnet produces by permanent magnet-cylinder body pass through magnetic flow liquid and turnbarrel-
Under, by the shear stress that magnetic field of permanent magnet causes act on turnbarrel-under, reach the effect of braking.
9. the elevator brake method with automatic protection functions based on magnetic rheology effect according to claim 7, it is special
Levy and be：Described DC source is produced through commutator by elevator power supply.
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| CN201611160603.3A CN106395672B (en) | 2016-12-15 | 2016-12-15 | The brake device for elevator and method with automatic protection functions based on magnetic rheology effect |
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| CN109095379A (en) * | 2018-11-05 | 2018-12-28 | 苏州市职业大学 | Elevator disc permanent-magnet brake |
| CN109179139A (en) * | 2018-11-05 | 2019-01-11 | 苏州市职业大学 | Elevator disk permanent magnet brake |
| CN109205497A (en) * | 2018-11-05 | 2019-01-15 | 苏州市职业大学 | Elevator drum-type permanent magnet brake |
| CN109854637A (en) * | 2019-02-26 | 2019-06-07 | 恒有（苏州）精工机电有限公司 | A kind of magnetorheological overload protection safety coupling that the torque of permanent-magnet-field is controllable |
| CN109941902A (en) * | 2019-02-27 | 2019-06-28 | 浙江润华机电有限公司 | A kind of hydraulic capstan |
| CN110360248A (en) * | 2019-07-30 | 2019-10-22 | 福州大学 | A kind of magnetic rheological brake of recyclable structure motion energy |
| CN112282089A (en) * | 2020-10-20 | 2021-01-29 | 黄飞雁 | Rheological state acoustic celotex board based on classic absorption |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109095379A (en) * | 2018-11-05 | 2018-12-28 | 苏州市职业大学 | Elevator disc permanent-magnet brake |
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| CN110360248A (en) * | 2019-07-30 | 2019-10-22 | 福州大学 | A kind of magnetic rheological brake of recyclable structure motion energy |
| CN110360248B (en) * | 2019-07-30 | 2020-12-25 | 福州大学 | Magnetorheological brake capable of recycling structure motion energy |
| CN112282089A (en) * | 2020-10-20 | 2021-01-29 | 黄飞雁 | Rheological state acoustic celotex board based on classic absorption |
| CN112282089B (en) * | 2020-10-20 | 2022-03-25 | 广西鸿昊新材料有限公司 | Rheological state acoustic celotex board based on classic absorption |
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