CN1523251A

CN1523251A - Magnetorheological continuously variable transmission

Info

Publication number: CN1523251A
Application number: CNA031358020A
Authority: CN
Inventors: 梁锡昌; 蒋建东
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2003-09-08
Filing date: 2003-09-08
Publication date: 2004-08-25
Anticipated expiration: 2023-09-08
Also published as: CN1295453C

Abstract

The present invention relates to a magnetorheological stepless speed changer, and is characterized by that it includes inner rotor fixedly connected with input shaft, excitation coil fixed in the interior, outer rotor supported on the input shaft by means of two end bearings and working medium magnetorheological fluid filled in the V-shaped working gap between inner rotor and outer rotor, in which the input torque and rotating speed can be passed through input shaft and inner rotor and can utilize the magnetorheological effect produced by means of magnetorheological fluid working medium under the action of coil field to produce force moment transferring action so as to implement stepless changed load torque and rotating speed output by outer rotor.

Description

Magneto-rheological stepless speed changer

Technical field

The present invention relates to stepless speed variator or stepless speed adjusting gear.Specifically be that a kind of magnetic flow liquid that adopts is the working medium step-less adjustment of carrying out torque and rotating speed between the input and output parts, can be used for the magneto-rheological stepless speed changer of occasions such as occasions such as electric bicycle, motorcycle and industrial small-power and the permanent torque control of needs.

Background technique

Traditional liquid viscosity transmission is to utilize the viscosity of liquid or oil-shear to be used for transferring power, usually the working liquid body that adopts has lubricant oil and silicone oil and hydraudynamic drive wet goods Newtonian fluid, and general adjusting oil slick thickness and the oil-shear Method for Area of adopting carried out speed regulation.The liquid_viscosity regulator system also needs huge oil supply system and complex control apparatus except arrangements for speed regulation, make that whole speed control system is bulky and cost an arm and a leg.And the eighties, electrorheological fluid in vogue showed in the application study of stepless change transmission field, the shear yield stress of electrorheological fluid is less (to be generally 20～40Kpa), and the operating voltage high (being generally several kilovolts) that adopts, make that the power supply unit of mechanism is huge and Security is bad, shown that more than baric flow becomes that fluids such as liquid, electrorheological fluid have been subjected to many restrictions on engineering is used and aspect of performance shows serious deficiency.

The application develop rapidly of magnetic flow liquid over past ten years, the engineering of magnetic rheology effect is used the performance aspect and is further enhanced, and makes well to be used at transmission field.But it mainly concentrates on the application of MR damper and fan speed-regulating clutch in the application of mechanical engineering field, and the magnetic flow liquid patent has U.S.Patent 5,785,882 and 6,149,832, introduced magnetic flow liquid with component and preparation; The MR damper patent has U.S.Pantent 4,992, and 190,5,549,837 and 6,471,018 B1 has introduced the various dampers of magnetic flow liquid; The magnetic rheological clutch patent has: U.S.Pantent 5,823, and 309 and 5,896,965, the structure of these two patents has all adopted the double plate structure; U.S.Panten 5,845,752,5,848,678 and EP0,882,904,1,167,800A1, these four patents adopted cup type clutch configuration and put control and adjusting in fan; U.S.Panten 6,371, and 267B1 the cooling problem of putting in the magnetic flow liquid that improves a kind of cup type clutch; Chinese patent 00104451 has been introduced a kind of plate clutch of radially self-pressurization structure.Above patent is respectively the introduction of magnetic rheological liquid damper and clutch with magnetic rheologic liquid, still lose patent disclosure at the infinite variable speed magneto-rheological stepless speed changer of mechanical transmission, the magneto-rheological stepless speed changer that the present invention introduces will occur and the characteristic of the The controllable magneto rheological change effect of magnetic flow liquid is used for Variable Speed Technology.

Summary of the invention

The invention provides a kind of inner and outer rotors structure and magneto-rheological stepless speed changer of V-arrangement working clearance of adopting.Adopt the working medium of functional material magnetic flow liquid as the working clearance between principal and subordinate's dynamic component, its viscosity and yield stress can be controlled by externally-applied magnetic field, by adjustable DC electrical source step-less adjustment field coil electric current, change the yield stress of working medium magnetic flow liquid, thereby change the rotating speed of mechanism's torque transmitted and load end.

The above-mentioned purpose that the present invention adopts is to realize by such technological scheme, it is a kind of magneto-rheological stepless speed changer, it is characterized in that: comprise the internal rotor that connects firmly with input shaft, the internal fixation field coil, be supported on external rotor on the input shaft by bearings at both ends, be full of the working medium magnetic flow liquid of V-arrangement working clearance between the inner and outer rotors; Wherein input torque and rotating speed by the generation magnetic rheology effect carry-over moment effect of magnetic flow liquid working medium under the coil the action of a magnetic field, are realized load torque and rotating speed by external rotor output stepless change by input shaft, internal rotor.

Above-mentioned magneto-rheological stepless speed changer adopts in the inner and outer rotors structure, and internal rotor is a bevelled disk on 2 excircles, is fixed on the input shaft; External rotor is an output block, the internal fixation field coil, by two bearings on input shaft, but connection blue output torque and rotating speed.

The above-mentioned magneto-rheological stepless speed changer of mentioning, internal rotor is made of 2 internal rotor disks that are fixed on the input shaft, and the disk outer surface is processed as the inclined-plane of suitable radius and radial width and axial thickness.Internal rotor adopts suitable dimension to guarantee the isoparametric requirement of work magnetic circuit magnetic flux

The above-mentioned magneto-rheological stepless speed changer of mentioning, external rotor is made up of three left end yokes, middle yoke and three parts of right-hand member yoke, and each parts adopts suitable dimension to guarantee the isoparametric requirement of work magnetic circuit magnetic flux.Coil stationary is internal rotor outside, and during the coil assembling, the resistant to elevated temperatures sealer of inner peripheral surface coating guarantees the sealing of the magnetic flow liquid under normal working temperature.

The above-mentioned magneto-rheological stepless speed changer of mentioning, adopt the V-arrangement working clearance of proper width and length, the V-arrangement work nest is made of jointly internal rotor outer surface and external rotor internal surface, this V-arrangement working clearance has increased the effective work area and the even distribution of working clearance field intensity of working medium magnetic flow liquid, has significantly shortened the axial dimension of magneto-rheological stepless speed changer.

The above-mentioned magneto-rheological stepless speed changer of mentioning, field coil are fixed in the external rotor parts, and the skeleton of exhausted magnetic material is adopted at the inner ring position of coil, and are coated with resistant to elevated temperatures sealer at the matching part with yoke; Adjustable DC electrical source is regulated the exciting curent of yoke interior loop by fixing brush spring and epitrochanterian outside sliding brush.The magnetic circuit flow direction that the opposite access of the positive negative conductor of two coils makes two coils produce partly has humidification at shared magnetic circuit.

The above-mentioned magneto-rheological stepless speed changer of mentioning adopts the sealing of magnetic rubber seal ring to be full of the active chamber of magnetic flow liquid, and the magnetic flow liquid of curing seal ring local location has reduced the wearing and tearing of magnetic flow liquid magnetic-particle to seal ring.

Description of drawings

Accompanying drawing is impracticable novel structural profile schematic representation.

In the accompanying drawing, 1-input shaft, 2-left end cap, 3-circlip, 4-bearing, 5-seal ring, 6,8,9-external rotor conjugation iron, 7-coil, 1-internal rotor disk, 11--magnetic flow liquid, 12-sliding brush, 13-circlip.

Embodiment

Input torque and rotating speed are by input shaft 1, internal rotor disk 10, and by working medium 11 transmitting torque under coil 5 excitation field effects, by

external rotor

6,8,9 output loading torque and rotating speeds, the external rotor right-hand member can connect output coupling member such as standard flange.

Input shaft 1 and two internal rotor disks 10 are fixed together, and coil 7 is fixed in the external rotor, and its exciting curent is regulated by sliding brush 12 by the adjustable DC electrical source in outside.Four radials of two internal rotor disks 10 and the internal surface of

external rotor yoke

6,8,9 form two V-arrangement working clearances, and magnetic flow liquid 11 is full of whole active chamber, by epitrochanterian seal ring 5 sealings outside.Two internal rotor disks 10 are radially fixed by key by the middle part shaft shoulder and circlip 13 axially locating of axle 1.Whole external rotor parts are supported on the input shaft 1 by bearing 4, and left and right sides bearing 4 carries out stationary positioned by the back-up ring in two shaft shoulders and left end cap 2 and the right-hand member external rotor, and external rotor is by left end cap 2 and left and right sides bearing location.

Claims

1. magneto-rheological stepless speed changer, it is characterized in that: comprise the internal rotor (10) that connects firmly with input shaft, internal fixation field coil (7) is supported on external rotor on the input shaft by bearings at both ends, is full of the working medium magnetic flow liquid (11) of V-arrangement working clearance between the inner and outer rotors; Wherein input torque and rotating speed by the generation magnetic rheology effect carry-over moment effect of magnetic flow liquid working medium under the coil the action of a magnetic field, are realized load torque and rotating speed by external rotor output stepless change by input shaft, internal rotor.

2. magneto-rheological stepless speed changer according to claim 1 is characterized in that: internal rotor is made of 2 the internal rotor disks (10) that are fixed on the input shaft, and the V-arrangement of certain radial width and axial thickness is processed in the suitable radius circumference outer on disk two sides.

3. according to the magneto-rheological stepless speed changer under the claim 1, it is characterized in that: external rotor is made up of left end yoke (6), middle yoke (8) and (9) three parts of right-hand member yoke, and internal surface has the V-arrangement ditch of appropriate size; Field coil is fixed on external rotor inside, and the inner lead duct of coil electric lead is arranged in the rotor.

4. according to the magneto-rheological stepless speed changer under the claim 1, it is characterized in that: the V-arrangement working clearance is made of jointly internal rotor disk V-arrangement outer and external rotor internal surface groove.

5. according to claim 1, magneto-rheological stepless speed changer under 2, it is characterized in that: the skeleton of exhausted magnetic material is adopted at the inner ring position that is fixed on two field coils in the driven rotor parts, scribbles resistant to elevated temperatures sealer with the matching part of yoke; The magnetic circuit flow direction that the opposite access of the positive negative conductor of two coils makes two coils produce partly has humidification at shared magnetic circuit.

6. magneto-rheological stepless speed changer according to claim 1 is characterized in that: the magnetic rubber seal ring (5) between external rotor and axle is adopted in the sealing of the magnetic flow liquid active chamber between the inner and outer rotors.

7, adjustable DC electrical source is regulated the exciting curent of yoke interior loop by fixing brush spring and epitrochanterian outside sliding brush.