CN102252095B

CN102252095B - Seal method of magnetorheological fluid for elevator magnetorheological fluid brake and seal device

Info

Publication number: CN102252095B
Application number: CN2010101751705A
Authority: CN
Inventors: 张安戈; 张伟
Original assignee: SHENYANG YOULI MACHINERY & ELECTRICAL EQUIPMENT Co Ltd
Current assignee: LIAONING YOULI'AN ELECTROMECHANICAL EQUIPMENT CO., LTD.
Priority date: 2010-05-18
Filing date: 2010-05-18
Publication date: 2013-11-13
Anticipated expiration: 2030-05-18
Also published as: WO2011143980A1; CN102252095A

Abstract

The invention provides a seal method of a magnetorheological fluid for an elevator magnetorheological fluid brake and a seal device, for solving the problems of magnetorheological fluid leakage and brake failure caused by long-time abrasion in a method adopting the contact seal. The key point of the invention is that the magnetorheological fluid is infused between a rotor and a stator of the brake; and magnetic fields are respectively formed at two ends of the clearance in which the magnetorheological fluid is infused, and the magnetic flux of the magnetic field is limited to meet the condition that the magnetorheological fluid at two ends of the clearance becomes sticky. The invention has the beneficial effects that the infused liquid magnetic fluid is utilized as a seal ring, non-contact seal is realized, abrasion can not happen after long-time use, and the problem of the leakage of the magnetorheological fluid after the damage of the seal ring is solved radically.

Description

Magnetic flow liquid encapsulating method and the seal arrangement of elevator magnetorheological fluid brake

Technical field

The present invention relates to encapsulating method and the device of elevator brake, specifically magnetic flow liquid encapsulating method and the seal arrangement on elevator magnetorheological fluid brake.

Background technique

WO2009/032014 discloses a kind of " elevator magnetorheological fluid brake ", and the technical problem that it will solve is: elevator brake is to produce friction between braking frictional plate and Moving plate, and after long-time the use, braking plate is easily frayed.Its technological scheme is: annotate brake fluid in the gap between stator and rotor--magnetic flow liquid (magneto-yheologival fluid).Magnetic flow liquid is a kind of magnetic particle in suspension, for example can be comprised of 85wt% magnetic particle and 15wt% liquid.When elevator moved, when the resultant flux of permanent magnet and hot-wire coil was 0, magnetic flow liquid was liquid, and rotor is turning round without under abrasion state; While by control coil, resultant flux being increased gradually, the viscosity of magnetic flow liquid increases gradually until solidify and become solid, and rotor is fixed, and so goes round and begins again.While because of elevator, moving, magnetic flow liquid is liquid, thus realize that its goal of the invention also must solve sealing problem, otherwise liquid magnetic flow liquid can leak, and causes brake fluid to run off, and then brake failure, and brake failure is fatal problem for elevator.The disclosed seal approach of this article is " sealer 41 is enclosed between rotor 38 and elevator boss rods 36, and between rotor 38 and brake box 40, to prevent brake fluid 30, from chamber, 39 flows out " for this reason.Its Fig. 9 shows that sealer 41 is a kind of rings, when not further illustrating, is generally understood as seal ring, namely adopts way of contact sealing.The defect of seal ring is can damage after long-time wearing and tearing, causes magnetic flow liquid to leak.

Summary of the invention

, in order to solve the magnetic flow liquid leakage problem, the object of the present invention is to provide a kind of magnetic flow liquid encapsulating method and seal arrangement of elevator magnetorheological fluid brake.

The object of the present invention is achieved like this:

One, encapsulating method is:

1, magnetic flow liquid is annotated in the gap between elevator brake rotor and stator;

2, respectively form a magnetic field at the two ends in the gap of injecting magnetic flow liquid, the magnetic flux in this magnetic field forms thick being limited with the magnetic flow liquid at two ends, gap.

Two, use the seal arrangement of above-mentioned encapsulating method setting to be:

The device that forms magnetic field is, at the two ends in the gap of injecting magnetic flow liquid, an annular seal assembly is set respectively, and said annular seal assembly is comprised of enclosed magnet (permanent magnet or coil) and sealed magnetic pole; Black box is fixed on rotor assembly or stator module, and with stator or rotor, leaves gap.

In elevator when operation,, the magnetic flow liquid in whole gap be liquid, but the enclosed magnet at two ends, gap and sealed magnetic pole effect under, the magnetic flow liquid that is positioned at the two ends, gap is remained thick, become seal ring, the liquid magnetic flow liquid in gap is sealed.

Compare with WO2009/032014, the invention has the beneficial effects as follows: it utilizes the magnetic flow liquid self that has injected as seal ring, realize contactless sealing, do not have frayed problem after long-time use, fundamentally solved the problem that the impaired rear magnetic flow liquid of seal ring leaks.

Description of drawings

Further illustrate the present invention and realize seal arrangement of the present invention below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of external rotor, inner stator break.

Fig. 2 is the schematic diagram of Fig. 1 break permanent magnet magnetic flux.

Fig. 3 is the schematic diagram of Fig. 1 brake coil magnetic flux.

Fig. 4 is that Fig. 1 is the schematic diagram of 0 o'clock at the brake clearance resultant flux.

Fig. 5 is the schematic diagram of the magnetic field flux of Fig. 1 seal arrangement.

Fig. 6 is the structural representation of internal rotor, external stator break.

Embodiment

Embodiment one: seal arrangement uses on the break of external rotor, inner stator

Referring to Fig. 1, said stator module is: stator yoke 4, brake coil 18, break permanent magnet 19 and

non-magnetic gap

13 and 21 are fixed together with stator support 7.Said rotor assembly is: rotor case 1, rotor rim 2, rotor case baffle plate 3, rotor case back of the body cap 10 are fixed together with transmission shaft 11.Be full of magnetic flow liquid in gap 20 between rotor rim and stator yoke.

Said annular seal assembly is that an annular seal permanent magnet or coil 6 form by radially being clipped between two annular seal

magnetic poles

5 and 8, wherein there are one and an above crown in the surface of the first sealed magnetic pole 5, the present embodiment has two crowns 51, for the two-stage sealing, crown 51 leaves gap with stator yoke 4, two annular seal assemblies are separately positioned on the two ends in the gap 20 of injecting magnetic flow liquid, are fixed on rotor case 1.

When coil 18 interior no current, the main flux of permanent magnet 19 as shown in Figure 2.Magnetic flow liquids in this moment gap 20 are magnetized and become thickly, produce braking force between stator yoke 4 and rotor rim 2; When in coil 18, electric current being arranged, the main flux of coil 18 as shown in Figure 3.In gap 20 with the main flux opposite direction of permanent magnet 19.Sense of current and size in control coil 18, the resultant flux of main flux in gap 20 that makes the main flux of coil 18 and permanent magnet 19 are 0 as Fig. 4.This moment, gap 20 interior magnetic flow liquids became fluid because losing magnetization, thereby lost braking force between stator yoke 4 and rotor rim 2.So, during control coil 18 interior no current, be equivalent to the break braking, while in control coil 18, electric current being arranged, be equivalent to releasing of brake.

, referring to Fig. 5, seal the main flux of permanent magnet 6 through the first sealed magnetic pole 5, gap 20, stator yoke 4, the second sealed magnetic pole 8 closures, and at crown 51 places of the first sealed magnetic pole 5, form peakflux densities.Magnetic flow liquid in gap 20, by Local magnetization, forms thick O-ring seals at crown, has stopped up the leakage way of magnetic flow liquid in gap 20, plays seal action.

This example is two-stage single-side sealing structure.While needing larger sealability, can adopt multi-stage sealed or multistage two-side sealing structure.

Embodiment two: seal arrangement uses on the break of external stator, internal rotor

Referring to Fig. 6, said stator module is: stator yoke 21 and 22, brake coil 40 and non-magnetic gap 41 are fixed together with stator support 27.Said rotor assembly is: rotor rim 23, break permanent magnet 37 and axle sleeve 29 are fixed together with transmission shaft 30.Be full of magnetic flow liquid in gap 38 between rotor rim 23 and stator yoke 21.

Said annular seal assembly is that an annular seal permanent magnet or coil 25 form by radially being clipped between two annular seal magnetic poles 24 and 26, two annular seal assemblies are separately positioned on the two ends in the gap 38 of injecting magnetic flow liquid, be fixed on stator support 27, wherein there is a crown 241 on the surface of the first sealed magnetic pole 24, and crown 241 leaves gap with rotor rim 23.

Working method is identical with embodiment one.

Claims

1. the magnetic flow liquid encapsulating method of an elevator magnetorheological fluid brake, is characterized in that: the gap notes magnetic flow liquid between brake rotor and stator; Two ends in the gap of injecting magnetic flow liquid respectively form a magnetic field, and the magnetic flux in this magnetic field forms thick being limited with the magnetic flow liquid at two ends, gap;

The device that forms magnetic field is, at the two ends in the gap of injecting magnetic flow liquid, an annular seal assembly is set respectively, this annular seal assembly is that an annular seal permanent magnet or coil form by radially being clipped between two annular seal magnetic poles, be fixed on rotor case or stator support, wherein there are one and an above crown in the surface of the first sealed magnetic pole, and crown and stator yoke or rotor rim leave gap.