CN102297228B

CN102297228B - Double-rod multidisc-piston magnetorheological fluid damper

Info

Publication number: CN102297228B
Application number: CN2011101691056A
Authority: CN
Inventors: 谭和平; 谢宁; 刘强; 谭晓婧
Original assignee: 谭晓婧
Priority date: 2011-06-22
Filing date: 2011-06-22
Publication date: 2012-11-07
Also published as: CN102297228A

Abstract

The invention discloses a double-rod multidisc-piston magnetorheological fluid damper, the damper is composed of a working cylinder, an external electromagnet, a multidisc piston and a piston rod, wherein the multidisc piston is composed of three sets or more than three sets of rotor plates; each set of rotor plate is a circle ring consisting of a strip-shaped flat plate with a circular hole in the middle and two semicircle-shaped flat plates, and the rotor plate is formed in the way that two parallel straight edges of the strip-shaped flat plate with a circular hole in the middle are respectively connected with a semicircle-shaped flat plate; the external diameter of each rotor plate is less than the internal diameter of the working cylinder and provided with a magnetorheological fluid clearance, and each set of rotor plate of the multidisc piston is fixed at the middle part of the piston rod with a certain spacing by virtue of the circular hole on the rotor plate; two ends of the piston rod stretch out from the two ends of the working cylinder respectively by virtue of a sealing device and a bearing arranged on the two end surfaces of the working cylinder, the external electromagnet is fixed on the outer circumference of the working cylinder, the working cylinder is made of a non-magnetic material, and the working cylinder is filled with magnetorheological fluid.

Description

Two rod multi-disc piston MR dampers

Technical field

The invention belongs to a kind of MR damper, be specifically related to a kind of pair of rod multi-disc piston MR damper.

Background technique

Common two outstretch pole magnetorheological dampers can only produce the damping force of symmetry; Therefore; This type of MR damper mainly is applicable to the vibration damping of building and bridge, requires the asymmetric vibration damping occasion of damping force and be difficult to use in means of transportation such as automobile etc., simultaneously; Be wound with field coil on the piston because of common two outstretch pole magnetorheological dampers; So when common two outstretch pole magnetorheological dampers were worked, piston back and forth movement in clutch release slave cylinder will make the field coil on the piston receive washing away repeatedly of magnetic flow liquid and have a negative impact.

Summary of the invention

Can only produce symmetrical damping force and its field coil can receive magnetic flow liquid in clutch release slave cylinder the deficiency of washing away repeatedly to common two outstretch pole magnetorheological dampers; The present invention proposes a kind of novel MR damper, that is: a kind of pair of rod multi-disc piston MR damper.

Technological scheme of the present invention is following:

A kind of pair of rod multi-disc piston MR damper; It comprises clutch release slave cylinder, external electromagnet, multi-disc piston and piston rod; Multi-disc piston wherein is made up of the moving plate more than three groups or three groups; Every group of moving plate is ring, form by a round-meshed bar-shaped plate in centre and two semicircular arc flat boards, and be on two of the round-meshed bar-shaped plate in centre parallel straight flanges, to connect the dull and stereotyped formation of a semicircular arc respectively through hinge; The external diameter of moving plate is less than the internal diameter of clutch release slave cylinder and leave the magnetic flow liquid gap of flowing; Every group of moving plate of multi-disc piston is fixed on the middle part of piston rod through the circular hole on it by a determining deviation, and stretch out from the two ends of clutch release slave cylinder at the two ends of the piston rod seal arrangement and the bearing of two end faces through clutch release slave cylinder respectively, and external electromagnet is fixed on the excircle of clutch release slave cylinder; Clutch release slave cylinder is made up of non-magnet_conductible material, in clutch release slave cylinder, has been full of magnetic flow liquid.

The present invention's's (constituting example by three groups of moving plates with the multi-disc piston) function is achieved in that

When piston rod promotion multi-disc piston is in the end entering clutch release slave cylinder of clutch release slave cylinder; Owing to receive the damping function of magnetic flow liquid in the clutch release slave cylinder; Two semicircular arcs on the moving plate are dull and stereotyped can be towards with the piston rod opposite direction of advancing bending taking place under the effect of hinge, after the dull and stereotyped bending of two semicircular arcs, makes the gap enlargement of multi-disc piston and clutch release slave cylinder and the damping force of piston rod promotion multi-disc piston entering clutch release slave cylinder is reduced; When piston rod promotes the multi-disc piston when an end of clutch release slave cylinder is deactivated in the cylinder; Owing to receive the damping function of magnetic flow liquid in the clutch release slave cylinder; On the moving plate bending two semicircular arcs dull and stereotypedly can under the effect of hinge, return to dull and stereotyped state towards withdrawing from opposite direction with piston rod, the gap of multi-disc piston and clutch release slave cylinder reduced and make piston rod promote the damping force increase that the multi-disc piston gets into clutch release slave cylinder.

When the external electromagnet no electric circuit, the magnetic intensity in the clutch release slave cylinder is zero, thereby the magnetic flow liquid viscosity in the clutch release slave cylinder is minimum, and it is less that piston rod promotes multi-disc piston suffered damping force when an end of clutch release slave cylinder is in clutch release slave cylinder; After external electromagnet energising, the magnetic intensity in the clutch release slave cylinder is higher, makes the magnetic flow liquid viscosity in the clutch release slave cylinder higher, piston rod promote the multi-disc piston in clutch release slave cylinder the time suffered damping force bigger; Adjustment gets into the size of current of external electromagnet can adjust the magnitude of field intensity in the clutch release slave cylinder, thereby the size of adjustment piston rod suffered damping force in the clutch release slave cylinder makes the damping force of two rod multi-disc piston MR dampers obtain adjustment.Because when the moving plate on two rod multi-disc piston MR dampers is made back and forth movement at piston rod promotion multi-disc piston in clutch release slave cylinder; Hinge on the moving plate can make moving plate change to the bending state or return to dull and stereotyped state from the bending state from dull and stereotyped state; Gap between moving plate and the clutch release slave cylinder is changed, thereby make two rod multi-disc piston MR dampers obtain asymmetric damping force.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention.

Fig. 2 is the sectional view of Fig. 1.

Fig. 3 is the schematic representation of one group of moving plate among Fig. 1.

Fig. 4 is the sectional view of Fig. 3.

Fig. 5 is a work schematic representation of the present invention.

Fig. 6 is the sectional view of Fig. 5.

Embodiment

Specify structure of the present invention below in conjunction with accompanying drawing:

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this is a kind of concrete structure of the present invention, multi-disc piston and piston rod 6 that it comprises the clutch release slave cylinder 11 that is made up of non-magnet_conductible material, external electromagnet 1, is made up of three groups of moving plates 15; The every group of moving plate 15 that constitutes the multi-disc piston is ring; Form by bar-shaped plate 12 and two semicircular arcs dull and stereotyped 3 of circular hole 17 by a centre; Be on there are two parallel straight flanges of bar-shaped plate 12 of circular hole 17 centre, to connect a semicircular arc dull and stereotyped 3 respectively to constitute through hinge 2; The external diameter of moving plate 15 is less than the internal diameter of clutch release slave cylinder 11 and leave the magnetic flow liquid gap 13 of flowing, and every group of moving plate 15 of multi-disc piston is fixed on the middle part of piston rod 6 through the circular hole on it 17 by a determining deviation, and the two ends of piston rod 6 are the seal arrangement 4 and bearing 5, seal arrangement 9 and bearing 10 of two end faces through clutch release slave cylinder 11 respectively; Stretch out from the two ends of clutch release slave cylinder 11; External electromagnet 1 is fixed on the excircle of clutch release slave cylinder 11, in clutch release slave cylinder 11, has been full of magnetic flow liquid 14, and control power supply 8 is connected with external electromagnet 1 through lead-in wire 7.

Referring to Fig. 5 and Fig. 6; When piston rod 6 promotion multi-disc pistons are in the right-hand member entering clutch release slave cylinder 11 of clutch release slave cylinder 11; Owing to receive the damping function of magnetic flow liquid 14 in the clutch release slave cylinder 11; Two semicircular arcs on the moving plate 15 dull and stereotyped 3 can make gap 13 expansions of 11 of multi-disc piston and clutch release slave cylinders and the damping force of piston rod 6 promotion multi-disc pistons entering clutch release slave cylinders 11 is reduced towards with the piston rod 6 opposite direction of advancing bending taking place under the effect of hinge 2 after dull and stereotyped 3 bendings of two semicircular arcs; When piston rod 6 promotes the multi-disc pistons when the right-hand member of clutch release slave cylinder 11 is deactivated in the cylinder 11; Owing to receive the damping function of magnetic flow liquid 14 in the clutch release slave cylinder 11; On the moving plate 15 bending two semicircular arcs dull and stereotyped 3 can under the effect of hinge 2, return to dull and stereotyped state towards withdrawing from opposite direction with piston rod 6, the gap 13 that makes 11 of multi-disc piston and clutch release slave cylinders reduces and makes piston rod 6 promote the deactivate damping force increase of cylinder 11 of multi-disc pistons; Adjustment control power supply 8 is transported to the size of current in the external electromagnet 1; Can adjust the viscosity of magnetic flow liquid 14 in the clutch release slave cylinder 11; Make piston rod 6 drive the damping force that receives when the multi-disc piston moves in clutch release slave cylinder 11 and change, make the damping force of two rod multi-disc piston MR damper outputs obtain adjustment.

Claims

1. two rod multi-disc piston MR damper; It comprises clutch release slave cylinder, external electromagnet, multi-disc piston and piston rod; It is characterized in that: said multi-disc piston is made up of the moving plate more than three groups or three groups; Said every group of moving plate is ring, form by a round-meshed bar-shaped plate in centre and two semicircular arc flat boards, and be on two of the round-meshed bar-shaped plate in centre parallel straight flanges, to connect the dull and stereotyped formation of a semicircular arc respectively through hinge; The external diameter of moving plate is less than the internal diameter of clutch release slave cylinder and leave the magnetic flow liquid gap of flowing; Every group of moving plate of said multi-disc piston is fixed on the middle part of piston rod through the circular hole on it by a determining deviation, and stretch out from the two ends of clutch release slave cylinder at the two ends of the piston rod seal arrangement and the bearing of two end faces through clutch release slave cylinder respectively, and external electromagnet is fixed on the excircle of clutch release slave cylinder; Clutch release slave cylinder is made up of non-magnet_conductible material, in clutch release slave cylinder, has been full of magnetic flow liquid.