CN1945047A - Auxiliary braking device for magnetic rheological body petroleum drilling rig - Google Patents
Auxiliary braking device for magnetic rheological body petroleum drilling rig Download PDFInfo
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Abstract
The auxiliary braking device with magnetic rheological body for petroleum rig includes one cylinder of non-magnetic conductive material and two end caps of magnetic conductive material to form one sealed cylindrical cavity, two magnetic conductive columns with wound exciting coil outside the cylinder and between the two end caps, one shaft of non-magnetic conductive material with fixed magnetic conductive blades set between the two end caps, and magnetic rheological body filled in the sealed cylindrical cavity. The present invention can provide great braking moment at all rig winch speeds, and has stepless regulation of braking moment, fast response, low cost and long service life.
Description
Technical field
The present invention relates to a kind of oil-well rig auxiliary brake, especially a kind of oil-well rig auxiliary brake of using the magnetic rheological body technology.
Background technique
At present, public oil-well rig auxiliary brake has hydromatic brake, electromagnetic eddy current brake, multiple-disc brake, four kinds of Eton gas control brakes.
Hydromatic brake is a kind of auxiliary brake that oil-well rig often adopts, and its braking torque is directly proportional with the quadratic power of rotating speed, and therefore braking torque is very low when low-speed running, can not satisfy the needs that bore under the deep-well.
Electromagnetic eddy current brake, as the Chinese patent notification number: 2079386, a kind of electromagnet eddy current braking device is provided.Form by motor, transformer, rectifier, stator, stator coil, rotor shaft, cooling water chamber and water-circulating cooling device etc., its major character is that its stator can be driven with respect to rotor rotation through worm and worm gear by motor, so that still can keep certain braking moment after the brake rotor stall, hover and do not start under the situation of rig master motor at drill string, low speed lifting constant weight, be used for oil-well rig winch auxiliary brake, can improve the ability of processing accident.Though electromagnetic eddy current brake in high speed stage have big approaching constant braking torque, under the sub-fraction slow-speed of revolution, retarding torque sharply diminishes along with diminishing of rotating speed.
Multiple-disc brake, as the Chinese patent notification number: 2470525, a kind of drill disk-type braking device is provided, include selector valve, oil pump, enclosed pincers, open type pincers, oil pump is by selector valve and enclosed clipper joint, selector valve 2 is connected with the control mouth of selector valve 4, selector valve 1 is connected with the control mouth of selector valve 3, can be at any time, automatically the gap that produces because of the brake block wearing and tearing is regulated, can under the situation that reduces braking clamp quantity, satisfy the requirement of Emergency braking, only use the requirement of enclosed pincers when also having satisfied maintenance simultaneously brake weight.Chinese patent notification number and for example: 2390857, a kind of hydraulic control disc brake device is provided.Mainly form by braking clamp, tong holder and brake disc, brake disc and main frame winch drum are connected, tong holder on braking clamp and the winch base is connected, braking clamp comprises working clamp and catch block, and both sides and the hinged caliper of lever one end that the brake block of braking clamp is arranged on the dish cylindrical are connected, the pole that caliper is connected is sliding fit through bearing pin and lever slotted eye, the lever the other end through bearing pin respectively with piston, oil cylinder links to each other, both ends of the spring links to each other with piston rod and oil cylinder respectively.Multiple-disc brake relies on the friction-produced braking moment of friction facing and metal dish, and friction facing damages easily, needs often to change.
Eton gas control auxiliary brake is to utilize compressed-air actuated pressure to reach the brake purpose, but need carry out strict processing to pressurized air.
In the braking technology field, magneto-rheologic liquid brake is arranged in addition.As Chinese patent, notice of authorization CN 1231686C, a kind of rotary magnetic rheological liquid break of structurally variable is disclosed, comprise bearing (ball) cover, sealing cover, magnetically conducting inner tube, electromagnetic coil, magnetic conduction urceolus, rotating shaft, positioning key, bearing, magnetic flow liquid, two rotating disks, sealing material, it is characterized in that magnetically conducting inner tube and magnetic conduction urceolus all are cylindrical bodys of being made by permeability magnetic material, magnetically conducting inner tube has discoidal separation structure, this structure centre has the circular hole for the rotating shaft operation, after magnetically conducting inner tube is passed in rotating shaft, join by positioning key and two rotating disks; Electromagnetic coil is attached in the magnetic conduction urceolus housing, its lead is drawn outside the magnetic conduction urceolus, electromagnetic coil is enclosed within on the magnetically conducting inner tube with the magnetic conduction urceolus, the sealing cover of left end is connected with the magnetically conducting inner tube left end by bolt, and bearing compresses sealing material, and the bearing (ball) cover of left end is connected on the sealing cover of left end, in magnetically conducting inner tube, fill with magnetic flow liquid, in like manner, bearing compresses sealing material, and the bearing (ball) cover of right-hand member is connected on the sealing cover of right-hand member.
This is a kind of disc type magneto-rheologic liquid brake (external existing), is a kind of break of shear mode.Its structure is that two rotating disks rotate at magnetically conducting inner tube, shears magnetic fluid by the face of disk, must keep very near distance between two dishes, otherwise inoperative.The principle of its braking is to have utilized under magnetic field, the magnetic fluid shear strength generation braking torque that changes between stator and the rotor (rotating disk).Therefore the shortcoming of this break is: the first, and the circumferential surface of rotor (rotating disk) can not produce braking moment; The second, braking moment can be very little when the distance between rotor (rotating disk) and the stator was excessive, when rotating disk is very big, machine-building be difficult to guarantee rotor and stator between the uniformity of distance, optimum distance generally is the 0.5-3 millimeter; The 3rd, because the amount of its magnetic flow liquid that holds is less, thermal capacity is little, temperature rises fast, and the cutting performance of magnetic flow liquid can descend significantly, can cause braking moment to descend significantly, the braking moment deficiency is difficult to be applied to the occasion that image-stone oil rig requires big braking force like this; The 4th electromagnetic coil is enclosed within the heat that produces on the magnetically conducting inner tube and is not easy to give out; The 5th, behind the coil burnout, can lose braking moment, poor stability.
Summary of the invention
The objective of the invention is problem at existing oil-well rig auxiliary brake technology existence, a kind of auxiliary braking device for magnetic rheological body petroleum drilling rig is provided, utilize this device can finish the oil-well rig auxiliary brake, and this device has the braking moment that can both obtain to satisfy the needs that bore under the deep-well under any rotating speed of boring winch, and can realize that oil-well rig auxiliary brake braking moment is stepless adjustable, reaction velocity is fast.Auxiliary braking device for magnetic rheological body petroleum drilling rig relies on blade to stir magnetic flow liquid and produces braking moment, does not have wear-out part, long service life, and performance is safe and reliable.Overcome the rotary magnetic rheological liquid break simultaneously and adopt 2 turntable structures, rotating disk rotor to have only sagittal plane to produce the deficiency of braking moment, and overcome it and require accuracy of manufacturing height, the temperature shortcoming fast, that be difficult for distribute heat, poor stability that rises.
The know-why that the present invention adopts is:
The oil-well rig auxiliary brake of application magnetic rheological body technology provided by the invention has adopted the magnetic rheological body material, drives the blade rotation by axle, thereby the magnetic rheological body that is stirred under the action of a magnetic field produces bigger braking moment.Compare with the rotary magnetic rheological liquid break, its structure is obviously different, has adopted blade structure, can make excessive demands blade and distance all around.Its braking principle is that viscosity magnetorheological under magnetic field can become very high, around the blade, the radial and axial limit that comprises blade, the capital produces shear resistance, simultaneously because magnetorheological viscosity can become very high, blade also can produce bigger resistance in face of the face of magnetic flow liquid, is a kind of principle of stirring.This kind structured magneto-rheological liquid filling amount is big, and thermal capacity is big, enforcement is cooled off easily, is suitable for the occasion of high-power braking.Adopt conducting magnetic column to be placed on the structure in the cylinder barrel outside, coil dispels the heat easily; And conducting magnetic column also can many, and the coil twining amount is big, and coil can be wrapped in respectively on the conducting magnetic column, even the single line circle burns, all the other coils still play a role, and have increased the safety reliability of this brake, can not cause whole braking brake malfunctioning because of burning of single line circle.
Auxiliary braking device for magnetic rheological body petroleum drilling rig concrete structure provided by the invention comprises: upper and lower magnetic conduction end cap is arranged, be fixed with the cylinder type cylinder barrel that non-magnet material is made between the upper and lower magnetic conduction end cap, the cylinder type cylinder barrel has the magnetic conduction cylinder outward, and the magnetic conduction cylinder is installed in the outside of cylinder barrel; Non-magnetic axle is arranged in the middle of the upper and lower magnetic conduction end cap, be fixed with the magnetic conduction straight radial blade that thickness is the 10-60 millimeter on the non-magnetic axle, cylinder barrel and two magnetic conduction cylinders that are wound with field coil are fixed between the upper and lower magnetic conduction end cap, and cylinder barrel cooperates with upper and lower magnetic conduction end cap and formed an airtight circular cylindrical cavity.Be installed in leaf position on the axle in cylinder type cylinder barrel cavity, the side end face of blade and upper and lower end face respectively and the gap between cylinder barrel and the upper and lower magnetic conduction end cap be the 2-30 millimeter.Be full of magnetic rheological body in the airtight circular cylindrical cavity.
Between non-magnetic axle and the magnetic conduction end cap rolling bearing, seal ring and pressing plate can be arranged.
Between a non-magnetic axle and the end magnetic conduction end cap rolling bearing, seal ring and pressing plate are arranged; Between non-magnetic axle and the other end magnetic conduction end cap rolling bearing is arranged.
Distance between the upper and lower magnetic conduction end cap can be between the 200-1000 millimeter.The cylinder type internal diameter of cylinder is between the 300-1500 millimeter.The diameter of two magnetic conduction cylinders that are wound with field coil is between the 10-300 millimeter; In the field coil number of turn on the magnetic conduction cylinder between the 200-1000 circle.
The shape of described blade can have straight-plate-type, dead slot formula, open type; The cylinder that taper hole can also be arranged on the both sides of open type blade.
The straight-plate-type blade be shaped as rectangle; Dead slot formula blade is that symmetry has several long and narrow rectangle grooves on the basis of straight-plate-type blade; The open type blade is that symmetry is opened two circular holes on the basis of straight-plate-type blade, cylinder that can the mounting strap taper hole on two circular holes.
The quantity 2-5 root of described magnetic conduction cylinder, the number of blade are the 2-12 sheets.
Auxiliary braking device for magnetic rheological body petroleum drilling rig has been used the magnetic rheological body material, drives the blade rotation by axle, thereby the magnetic rheological body that is stirred under the action of a magnetic field produces bigger braking moment.Because cylinder barrel magnetic conduction not,, between upper and lower magnetic conduction end cap, produced the axial magnetic field of a uniform magnetic direction perpendicular to the magnetic conduction end cap so this installs under the effect of field coil.The effect of magnetic rheological body in the chamber in magnetic field issues the magnetisation rheological effect.When axle rotates, be placed in the blade rotation in the chamber, the magnetic rheological body in the stir chamber makes that the magnetic rheological body in the chamber is sheared, and the shear yield stress of magnetic rheological body will form bigger braking moment to the rotation of axle.This shear yield stress is the characteristic of magnetic rheological body itself, and is only relevant with the power of magnetic rheology effect, and irrelevant with shear strain rate, promptly irrelevant with the rotating speed of axle.Axle of the present invention is connected with the brake axle of petroleum drilling machine winch.When the needs auxiliary brake, connect DC electrical source to field coil, two magnetic conduction magnetic fields that cylinder produces are forming uniform magnetic field up and down between the end cap, and blade is subjected to shear yield stress, and the brake axle of petroleum drilling machine winch obtains bigger braking moment simultaneously.The big braking moment that auxiliary braking device for magnetic rheological body petroleum drilling rig forms can play auxiliary preferably petroleum drilling machine winch braking action.
Because the power of magnetic rheology effect is relevant with magnetic intensity, thus can strengthen magnetic rheology effect by strengthening magnetic intensity, thus increase shear yield stress, just increase braking moment, otherwise then reduce braking moment.And the size of magnetic intensity can be by regulating field coil the size of electric current change.Because the response time of magnetic rheology effect is a Millisecond, then can realize the quick adjustment of braking moment.
Outstanding beneficial effect of the present invention is: can both provide bigger braking moment under any rotating speed of boring winch, the shortcoming of the auxiliary brake low-speed performance difference before having overcome.Simultaneously, adopting technological scheme of the present invention, can be implemented in the stepless adjustable of braking moment under any rotating speed of boring winch, and speed of response is fast, is the automatization level preparatory condition that improves oil-well rig.Of the present invention in addition simple in structure, cheap for manufacturing cost; Do not relate to the friction between solid, long service life.Owing to adopted blade structure, can make excessive demands blade and all around distance, manufacturing is simple, around the blade and blade meet liquid level and all can produce resistance, braking moment is big.This kind structured magneto-rheological liquid filling amount is big, big, the enforcement cooling easily of thermal capacity.These all are the rotary magnetic rheological liquid break outstanding advantage parts that is different from turntable structure.Owing to adopt conducting magnetic column to be placed on the structure in the cylinder barrel outside, coil dispels the heat easily, and conducting magnetic column also can many, the coil twining amount is big, coil can be wrapped on the conducting magnetic column respectively, even the single line circle burns, all the other coils still play a role, increased the safety reliability of this brake, can not cause whole braking brake malfunctioning because of burning of single line circle.Thereby can prevent effectively that the percussion drill accident from taking place, this is particularly important for high risk drilling well industry.This also is the advantage part that is different from rotary magnetic rheological liquid break turntable structure.
Above-mentioned oil-well rig auxiliary brake structure of the present invention has outstanding improvement, meets the big needs of oil-well rig auxiliary brake braking moment fully and has produced unexpected beneficial effect; It is simple in structure, and the manufacturing cost is low, has produced positive, progressive effect.It is the new design of a novelty, practicality.
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Description of drawings
Fig. 1 is an auxiliary braking device for magnetic rheological body petroleum drilling rig structural profile schematic representation of the present invention.It is embodiment 1 structural representation.
Fig. 2 is the structural representation of the magnetic conduction straight radial blade 8 of auxiliary braking device for magnetic rheological body petroleum drilling rig of the present invention.
Fig. 3 is the another kind of structural representation of the magnetic conduction blade 8 of auxiliary braking device for magnetic rheological body petroleum drilling rig of the present invention.Be embodiment 2 blade 8 structural representations.
Fig. 4 is the another kind of structural representation of the magnetic conduction blade 8 of auxiliary braking device for magnetic rheological body petroleum drilling rig of the present invention.Be embodiment 3 blade 8 structural representations.
Among the figure, 1. go up the magnetic conduction end cap, 2. be wound with the magnetic conduction cylinder of field coil, 3. descend the magnetic conduction end cap, 4. rolling bearing, 5. seal ring, 6. spool, 7. pressing plate, 8. blade, 9. magnetic rheological body, 10. cylinder barrel, 11. field coils, 12. rectangular openings, the cylinder of 13. band taper holes.
Embodiment
Embodiment 1: consult accompanying drawing 1.Auxiliary braking device for magnetic rheological body petroleum drilling rig, upper and lower magnetic conduction end cap 1,3 external diameters are 1000 millimeters, 50 millimeters of thickness, permeability magnetic material is made.In the middle of the last magnetic conduction end cap 3 axis hole is arranged.Be fixed with the cylinder type cylinder barrel 10 that non-magnet material is made between the upper and lower magnetic conduction end cap 1,3,700 millimeters of cylinder type cylinder barrel 10 internal diameters, 300 millimeters of height, non-magnet_conductible material is made.Cylinder type cylinder barrel 10 is outer two magnetic conduction cylinders 2 that are wound with field coil, is wound with 300 millimeters of magnetic conduction cylinder 2 effective lengths of field coil, 70 millimeters of diameters.Two magnetic conduction cylinders 2 that are wound with field coil are installed in the both sides of cylinder barrel 10; Cylinder barrel 10 and two magnetic conduction cylinders 2 that are wound with field coil are fixed between the upper and lower magnetic conduction end cap 1,3.Non-magnetic axle 6 is arranged in the middle of the upper and lower magnetic conduction end cap 1,3,150 millimeters of non-magnetic axle 6 diameters, 450 millimeters of length, non-magnet_conductible material is made.Between non-magnetic axle 6 and the upper end magnetic conduction end cap 3 rolling bearing 4, seal ring 5 and pressing plate 7 are arranged; Between non-magnetic axle 6 and the other end magnetic conduction end cap 1 rolling bearing is arranged.Be fixed with magnetic conduction straight radial blade 8 on the non-magnetic axle 6.The number of blade 8 can be 6.10 millimeters permeability magnetic materials of blade 8 thickness are made.Field coil 11 is respectively 600 circles in the number of turn that is wound with winding on the magnetic conduction cylinder 2 of field coil.0.8 millimeter of diameter of wire.Cylinder barrel 10 cooperates with magnetic conduction end cap 1,3 up and down and has formed an airtight circular cylindrical cavity.Be fixed on blade 8 positions of axle on 6 in cylinder type cylinder barrel 10 cavitys, the shape of blade 8 is straight-plate-types.Consult accompanying drawing 2.The side end face of blade 8 and upper and lower end face respectively and the gap between cylinder barrel 10 and the upper and lower magnetic conduction end cap 1,3 respectively be 7 millimeters.Be full of magnetic rheological body 9 in the airtight circular cylindrical cavity.
Embodiment 2: embodiment 2 is substantially the same manner as Example 1, and difference is that the quantity that is wound with the magnetic conduction cylinder 2 of field coil is 4, is wound with the magnetic conduction cylinder 2 uniform outsides that are installed in cylinder barrel 10 of field coil.Field coil 11 numbers of turn that are wound with on the magnetic conduction cylinder 2 of field coil are respectively 350 circles.Consult accompanying drawing 3.The number of blade 8 can be 4.The shape of blade 8 is dead slot formulas, and the rectangular opening 12 of two symmetries is arranged on the blade 8.The side end face of blade 8 and upper and lower end face respectively and the gap between cylinder barrel 10 and the upper and lower magnetic conduction end cap 1,3 respectively be 3 millimeters.
Embodiment 3: embodiment 2 is substantially the same manner as Example 1, and difference is that the quantity that is wound with the magnetic conduction cylinder 2 of field coil is 6, is wound with the magnetic conduction cylinder 2 uniform outsides that are installed in cylinder barrel 10 of field coil.Field coil 11 numbers of turn that are wound with on the magnetic conduction cylinder 2 of field coil are respectively 750 circles.Consult accompanying drawing 4.The number of blade 8 can be 2.The shape of blade 8 is open types, and the cylinder 13 of band taper hole is arranged on the both sides of blade 8.The side end face of blade 8 and upper and lower end face respectively and the gap between cylinder barrel 10 and the upper and lower magnetic conduction end cap 1,3 respectively be 6 millimeters.
Claims (9)
1. auxiliary braking device for magnetic rheological body petroleum drilling rig, form by upper and lower magnetic conduction end cap (1,3), cylinder type cylinder barrel (10), magnetic conduction cylinder (2), non-magnetic axle (6) and blade (8), it is characterized in that: be fixed with the cylinder type cylinder barrel (10) that non-magnet material is made between the upper and lower magnetic conduction end cap (1,3), cylinder type cylinder barrel (10) is outer magnetic conduction cylinder (2), and magnetic conduction cylinder (2) is installed in the outside of cylinder barrel (10); On, following magnetic conduction end cap (1, non-magnetic axle (6) is arranged 3), be fixed with the magnetic conduction straight radial blade (8) that thickness is the 10-60 millimeter on the non-magnetic axle (6), cylinder barrel (10) and two magnetic conduction cylinders (2) that are wound with field coil (11) are fixed on, following magnetic conduction end cap (1,3) between, cylinder barrel (10) is with last, following magnetic conduction end cap (1,3) cooperation has formed an airtight circular cylindrical cavity, be installed in blade (8) position of axle on (6) in cylinder type cylinder barrel (10) cavity, the side end face of blade (8) and upper and lower end face respectively with cylinder barrel (10) and last, following magnetic conduction end cap (1,3) gap between is the 2-30 millimeter, is full of magnetic rheological body (9) in the airtight circular cylindrical cavity.
2. auxiliary braking device for magnetic rheological body petroleum drilling rig according to claim 1 is characterized in that: between non-magnetic axle (6) and the magnetic conduction end cap (1,3) rolling bearing (4), seal ring (5) and pressing plate (7) can be arranged.
3. auxiliary braking device for magnetic rheological body petroleum drilling rig according to claim 1 is characterized in that: between a non-magnetic axle (6) and the end magnetic conduction end cap (3) rolling bearing (4), seal ring (5) and pressing plate (7) can be arranged; Between non-magnetic axle (6) and the other end magnetic conduction end cap (1) rolling bearing can be arranged.
4. auxiliary braking device for magnetic rheological body petroleum drilling rig according to claim 1 is characterized in that: the distance between the upper and lower magnetic conduction end cap (1,3) is between the 200-1000 millimeter.Cylinder type cylinder barrel (10) internal diameter is between the 300-1500 millimeter, and the diameter of two magnetic conduction cylinders (2) that are wound with field coil (11) is between the 10-300 millimeter; Field coil (11) number of turn on magnetic conduction cylinder (2) is between the 200-1000 circle.
5. according to claim 1 or 2 or 3 or 4 described auxiliary braking device for magnetic rheological body petroleum drilling rig, it is characterized in that: the shape of described blade (8) is a straight-plate-type.
6. according to claim 1 or 2 or 3 or 4 described auxiliary braking device for magnetic rheological body petroleum drilling rig, it is characterized in that: the shape of described blade (8) is the dead slot formula, and rectangular opening (12) is arranged on the blade (8).
7. according to claim 1 or 2 or 3 or 4 described auxiliary braking device for magnetic rheological body petroleum drilling rig, it is characterized in that: the shape of described blade (8) is an open type, adds the cylinder (13) of band taper hole on the both sides of blade (8).
8, according to claim 1 or 2 or 3 or 4 described auxiliary braking device for magnetic rheological body petroleum drilling rig, it is characterized in that: the number of described blade (8) is the 2-12 sheet.
9, according to claim 1 or 2 or 3 or 4 described auxiliary braking device for magnetic rheological body petroleum drilling rig, it is characterized in that: the quantity 2-5 root of described magnetic conduction cylinder (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101139905A CN100414133C (en) | 2006-10-24 | 2006-10-24 | Auxiliary braking device for magnetic rheological body petroleum drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101139905A CN100414133C (en) | 2006-10-24 | 2006-10-24 | Auxiliary braking device for magnetic rheological body petroleum drilling rig |
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| CN1945047A true CN1945047A (en) | 2007-04-11 |
| CN100414133C CN100414133C (en) | 2008-08-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102252049A (en) * | 2011-05-05 | 2011-11-23 | 梁厚庞 | Manufacturing method of magnetic fluid brake device |
| CN102261405A (en) * | 2011-04-09 | 2011-11-30 | 林智勇 | Magnetic fluid oil pressure disc brake device |
| TWI391578B (en) * | 2011-02-22 | 2013-04-01 | Univ Nat Taipei Technology | Magneto-rheological fluid brake |
| CN104508313A (en) * | 2013-01-03 | 2015-04-08 | 陈金清 | Magnetic fluid buoyancy brake drum device |
| CN107939867A (en) * | 2017-10-24 | 2018-04-20 | 浙江零跑科技有限公司 | A kind of braking system of electric car and its magnetic fluid formula brake |
| CN109602152A (en) * | 2018-12-29 | 2019-04-12 | 漳州卫生职业学院 | Flask brush |
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| US5007513A (en) * | 1990-04-03 | 1991-04-16 | Lord Corporation | Electroactive fluid torque transmission apparatus with ferrofluid seal |
| DE19735897A1 (en) * | 1997-08-19 | 1999-02-25 | Bayer Ag | clutch |
| CN1372086A (en) * | 2001-02-28 | 2002-10-02 | 汪建晓 | Magnetic flow change liquid damper for control of rotary machinery rotor vibration |
| US6619444B2 (en) * | 2001-04-04 | 2003-09-16 | Delphi Technologies, Inc. | Magnetorheological fluid stopper at electric motor |
| US6854573B2 (en) * | 2001-10-25 | 2005-02-15 | Lord Corporation | Brake with field responsive material |
| CN1231686C (en) * | 2003-07-24 | 2005-12-14 | 上海交通大学 | Construction variable rotary magnetic current flowing deforming brake |
| CN1779289A (en) * | 2004-11-25 | 2006-05-31 | 上海工程技术大学 | Rotary magnetic rheological brake |
| CN200968369Y (en) * | 2006-10-24 | 2007-10-31 | 中国石油天然气集团公司 | Magnetic current variant oil-well rig auxiliary brake apparatus |
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- 2006-10-24 CN CNB2006101139905A patent/CN100414133C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI391578B (en) * | 2011-02-22 | 2013-04-01 | Univ Nat Taipei Technology | Magneto-rheological fluid brake |
| CN102261405A (en) * | 2011-04-09 | 2011-11-30 | 林智勇 | Magnetic fluid oil pressure disc brake device |
| CN102252049A (en) * | 2011-05-05 | 2011-11-23 | 梁厚庞 | Manufacturing method of magnetic fluid brake device |
| CN102252049B (en) * | 2011-05-05 | 2012-10-24 | 梁厚庞 | Manufacturing method of magnetic fluid brake device |
| CN104508313A (en) * | 2013-01-03 | 2015-04-08 | 陈金清 | Magnetic fluid buoyancy brake drum device |
| CN104508313B (en) * | 2013-01-03 | 2017-02-01 | 西安交通大学青岛研究院 | magnetic fluid buoyancy brake drum device |
| CN107939867A (en) * | 2017-10-24 | 2018-04-20 | 浙江零跑科技有限公司 | A kind of braking system of electric car and its magnetic fluid formula brake |
| CN109602152A (en) * | 2018-12-29 | 2019-04-12 | 漳州卫生职业学院 | Flask brush |
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