CN102979847A

CN102979847A - Rotary type magneto-rheological damper

Info

Publication number: CN102979847A
Application number: CN2012105094504A
Authority: CN
Inventors: 李军强; 王娟; 赵海文; 刘今越; 陈贵亮
Original assignee: Hebei University of Technology
Current assignee: Hebei University of Technology
Priority date: 2012-12-03
Filing date: 2012-12-03
Publication date: 2013-03-20
Anticipated expiration: 2032-12-03
Also published as: CN102979847B

Abstract

The invention discloses a rotary magneto-rheological damper, which is characterized in that the damper mainly includes a shell, a front end cover, a rear end cover, a front excitation coil, a rear excitation coil, a rotor, a bearing, a sealing ring, a sealing ring, a magnetic isolation Ring and casing; the front and rear end covers are located on both sides of the rotor and are connected to the casing respectively to form a stator; bearings and sealing rings are respectively placed between the rotor and the front and rear end covers, and the front and rear excitation coils are wound on the front and rear ends In the cover, the magnetic isolation rings are respectively installed between the front and rear end covers and the shell, and O-shaped sealing rings are respectively placed between the magnetic isolation rings and the outer shell and the front and rear end covers; The cavity between the rotor and the rotor is filled with magnetorheological fluid; the winding direction of the front and rear excitation coils is the same, the tail ends of the two are connected in series, and the head end is loaded with power, and the two sets of excitation coils form two parallel magnetic paths , to generate two magnetic fields in opposite directions, and the magnetic flux is the magnetic flux generated by a single excitation coil.

Description

A kind of revolving type magnetic rheologic damper

Technical field

The present invention relates to electronic device, be specially a kind of magnetic flow liquid that uses as the revolving type magnetic rheologic damper of medium.

Background technique

The controlled magnetic flow liquid of yield stress carries out work to revolving type magnetic rheologic damper between its stator and the rotor by being filled in.The work area of its rotor is one of principal element that affects the damper performance.At present, as working surface, damper has larger radial dimension to some revolving type magnetic rheologic dampers usually with the end face of rotor.Other revolving type magnetic rheologic dampers with the cylndrical surface of rotor as working surface, convenient rotor axial and/or the radial dimension of increasing, increasing the output torque of damper, but this kind structure but fails to utilize the end face of rotor.In addition, in order to obtain larger damping torque, polydisc chip MR damper also occurred, this kind damper is to utilize the end face of rotor as working surface equally, still exists axial dimension relatively large, the deficiency that structure is comparatively complicated.

Summary of the invention

In order to overcome the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is that a kind of revolving type magnetic rheologic damper is provided.This damper adopts single-deck sheet, Multi-working-surface design, and the rotor peripheral face is effectively increased, and can provide larger damping torque under less volume and weight, have simple in structure, leakage field is few, be convenient to the characteristics such as design, weight saving.

The technological scheme that the present invention solve the technical problem is: design a kind of revolving type magnetic rheologic damper, it is characterized in that this damper mainly comprises shell, front cover, rear end cover, front field coil, rear field coil, rotor, bearing, seal ring, seal ring, magnetic partiting ring and shell; Described front cover and rear end cover are positioned at the rotor both sides, and are connected with shell respectively, consist of stator; Place respectively bearing and seal ring between described rotor and front cover and the rear end cover, described front field coil is wound in the front cover, rear field coil is wound in the rear end cover, magnetic partiting ring be installed on respectively between front cover and the shell and rear end cover and shell between, between magnetic partiting ring and the shell, place respectively O type seal ring between magnetic partiting ring and front cover and the rear end cover; The top of shell has for the sealing liquid filling hole that adds magnetic flow liquid, fills magnetic flow liquid in the cavity between stator and rotor; The winding direction of described front field coil and rear field coil is identical, both tail ends join and are cascaded, both head ends connect respectively the both positive and negative polarity of power supply, two groups of field coils consist of the flux path of two parallel connections, after loading direct current, produce two magnetic fields of opposite direction, its magnetic flux is the magnetic flux that single field coil produces.

Compared with prior art, the revolving type magnetic rheologic damper of the present invention's design has the following advantages:

1. designed new MR damper magnetic structure, so that two end faces of rotor and cylndrical surface in the situation that does not increase rotor volume, have effectively increased the work area of rotor all as working surface.

2. the magnetic structure of damper is made of the magnetic circuit of two parallel connections, in the damper shell, and magnetic line of force opposite direction, magnetic flux wherein is the magnetic flux that single coil produces, and has reduced the thickness of shell.

3. two of damper rotor work area sums equal the rotor cylinder surface area, and the magnetic induction intensity of working zone is even, is easy to the designing and calculating of damper.

4. damper structure is simple, and part is easily processed, and during assembling, the dimensional accuracy of working zone guarantees easily.Description of drawings

Fig. 1 is that a kind of embodiment's of revolving type magnetic rheologic damper of the present invention master cuts open structural representation;

Fig. 2 is a kind of embodiment's of revolving type magnetic rheologic damper of the present invention left TV structure schematic representation;

Fig. 3 is that a kind of embodiment's of revolving type magnetic rheologic damper of the present invention (Fig. 2) A-A is to the sectional structure schematic representation;

Fig. 4 is that a kind of embodiment's of the revolving type magnetic rheologic damper of the present invention magnetic line of force moves towards schematic representation.

Embodiment

Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof.

The revolving type magnetic rheologic damper of the present invention's design (is called for short damper, referring to Fig. 1-4), it is characterized in that this damper mainly comprises shell 10, front cover 1, rear end cover 2, front field coil 3, rear field coil 4, rotor 5, bearing 6, seal ring 7, seal ring 8, magnetic partiting ring 9 and shell 10.

The front cover 1 of damper of the present invention and rear end cover 2 are positioned at rotor 5 both sides, and front cover 1 and rear end cover 2 link together with shell 10 usefulness screws respectively, consist of stator.Place respectively bearing 6 and seal ring 7 between rotor 5 and the front cover 1 and between rotor 5 and the rear end cover 2; Front field coil 3 is wound in the front cover 1, and rear field coil 4 is wound in the rear end cover 2, and magnetic partiting ring 9 is installed on respectively and reaches between rear end cover 2 and the shell 10 between front cover 1 and the shell 10; Between magnetic partiting ring 9 and the shell 10, between magnetic partiting ring 9 and the front cover 1 and place respectively O type seal ring 8 between magnetic partiting ring 9 and the rear end cover 2.The top of shell 10 has sealing liquid filling hole 11, and liquid filling hole 11 is used for adding magnetic flow liquid, and magnetic flow liquid is filled in the cavity between stator and the rotor 5.During damper work, liquid filling hole 11 usefulness screws and rubber sheet gasket sealing.Described front field coil 3 is identical with rear field coil 4 winding directions or structure, the tail end of front field coil 3 is connected with the tail end of rear field coil 4, two groups of field coils are cascaded, the head end of the head end of front field coil 3 and rear field coil 4 is current load end 12, connects respectively positive pole and the negative pole of power supply; Two groups of field coils consist of the flux path of two parallel connections, behind the loading direct current (d.c.), and two magnetic fields that front field coil 3 and rear field coil 4 produce opposite directions, its magnetic flux is the magnetic flux that single coil produces.

In the damper of the present invention, described forward and backward

field coil

3,4 with the position relationship of relevant each parts and the load mode of coil current, so that damper has had the flux path in parallel of two symmetries, wherein the magnetic line of force direction of a flux path is: front cover 1-front cover 1 and rotor 5 end clearances-rotor 5 end faces-rotor 5 cylndrical surface-rotor 5 cylndrical surface and shell 10 gaps-shell 10-front cover 1; The magnetic line of force direction of another flux path is: rear end cover 2-rear end cover 2 and rotor 5 end clearances-rotor 5 end faces-rotor 5 cylndrical surface-rotor 5 cylndrical surface and shell 10 gaps-shell 10-rear end cover 2(are referring to Fig. 4).

Damper of the present invention has two groups of working surfaces: two end faces of rotor 5 and the cylndrical surface of rotor 5, in other words, whole outer surfaces of rotor 5 are working surface.In the situation that does not increase damper rotor 5 volumes, two groups of working surfaces have farthest increased the work area of rotor 5.

A specific embodiment of damper of the present invention is designed to: the work cylndrical surface diameter of rotor 5 is 70mm, and the work cylndrical surface radial length of rotor 5 is 32mm, and the end face work toroidal surface internal diameter of rotor 5 is 20mm, and external diameter is 70mm; The minimum thickness of shell 10 is 7.8mm, working clearance 1mm; Front field coil 3 is identical with rear field coil 4 structures, is 230 circles, maximum operating currenbt 2A, maximal input 24W; Adopt the LORD MRF-140CG of company type magnetic flow liquid, during maximum operating currenbt, the damping torque that damper provides is 20Nm.

The present invention does not address part and is applicable to prior art.

Claims

1. A rotary magneto-rheological damper, characterized in that the damper mainly includes a shell, a front end cover, a rear end cover, a front excitation coil, a rear excitation coil, a rotor, a bearing, a seal ring, a seal ring, and a magnetic isolation ring and the casing; the front end cover and the rear end cover are located on both sides of the rotor, and are respectively connected with the casing to form a stator; bearings and sealing rings are respectively placed between the rotor, the front end cover and the rear end cover, and the front excitation coil is wound In the front end cover, the rear excitation coil is wound in the rear end cover, and the magnetic isolation rings are respectively installed between the front end cover and the casing, between the rear end cover and the casing, between the magnetic isolation ring and the casing, and between the magnetic isolation ring and the front end cover. O-rings are respectively placed between the stator and the rear end cover; the upper part of the shell is provided with a sealing filling hole for adding magnetorheological fluid, and the magnetorheological fluid is filled in the cavity between the stator and the rotor; the front excitation The winding direction of the coil and the rear excitation coil is the same, the tail ends of the two are connected in series, and the first ends of the two are respectively connected to the positive and negative poles of the power supply. The two sets of excitation coils form two parallel magnetic paths. After loading DC, Two magnetic fields with opposite directions are generated, and the magnetic flux is the magnetic flux generated by a single excitation coil.

2. The rotary magneto-rheological damper according to claim 1, characterized in that the diameter of the working cylindrical surface of the rotor is 70mm, and the radial length is 32mm; The minimum thickness of the shell is 7.8mm, and the working gap is 1mm; the structure of the front excitation coil and the rear excitation coil is the same, both of which are 230 turns, the maximum operating current is 2A, and the maximum input power is 24W; the MRF-140CG type magneto-rheological Liquid, when the maximum operating current, the damping torque provided by the damper is 20Nm.