CN202203320U

CN202203320U - Single-rod magnetorheological grease damper

Info

Publication number: CN202203320U
Application number: CN201120299511XU
Authority: CN
Inventors: 谭和平; 谢宁; 刘强; 谭晓婧
Original assignee: 谭晓婧
Priority date: 2011-08-18
Filing date: 2011-08-18
Publication date: 2012-04-25
Anticipated expiration: 2021-08-18

Abstract

The utility model discloses a single-rod magnetorheological grease damper which comprises a piston rod, a piston, a working cylinder and a compensation air bag. The working cylinder is cylindrical, the compensation air bag is fixed at the bottom of one end of the working cylinder, magnetorheological grease is fully filled in the working cylinder, the piston is in shape of an oblong ball body, the length of a short shaft of the oblong-ball-shaped piston is smaller than the inner diameter of the working cylinder, the short shaft is provided with flowing gaps of the magnetorheological grease, the length of the long shaft of the oblong-ball-shaped piston is smaller than the length of the working cylinder, two groups of magnetic exciting coils are wound around the oblong-ball-shaped piston, are distributed along the long shaft of the oblong-ball-shaped piston and are respectively arranged at two sides of the short shaft of the oblong-ball-shaped piston, and a protective layer is additionally arranged outside the magnetic exciting coils and is level to the peripheral wall of the oblong-ball-shaped piston; and one end of the piston rod is fixed at one end of the oblong-ball-shaped piston, and the other end of the piston rod is extended out from the interior of the working cylinder through a central hole on an end cover of the working cylinder.

Description

Single outstretch pole magnetorheological fat damper

Technical field

The utility model belongs to a kind of MR damper, is specifically related to a kind of single outstretch pole magnetorheological fat damper.

Background technique

MR damper is as a kind of intelligent vibration damping device; The size of its damping force can be carried out remote stepless through the control power supply and regulated; Mostly the working medium of existing MR damper is magnetic flow liquid, and magnetic flow liquid demonstrates low viscous characteristic under zero magnetic field condition; And under the action of a magnetic field of varying strength; Then demonstrate different viscosity, people have utilized this performance development of magnetic flow liquid to go out various MR dampers just, but owing to the sedimentation meeting of suspended phase in the magnetic flow liquid influences device performance; For this reason; People have developed another kind of magnetorheological materials again after magnetic flow liquid: the suspended phase sedimentation, because the special skeletal structure of magneto-rheological grease and stability is very high, can not take place and influence device performance in magneto-rheological grease; But the viscosity of magneto-rheological grease under zero magnetic field condition is higher and mobile relatively poor; And existing MR damper designs as working medium with magnetic flow liquid mostly, and mostly the piston of its damper is the cylinder bodily form, and cylinder bodily form piston is difficult to be applicable to this working medium of magneto-rheological grease.

Summary of the invention

Be difficult to be applicable to existing MR damper and the deficiency of magneto-rheological grease the utility model provides a kind of novel MR damper, that is: a kind of single outstretch pole magnetorheological fat damper.

The technological scheme of the utility model is following:

A kind of single outstretch pole magnetorheological fat damper, it comprises: piston rod, piston, clutch release slave cylinder and compensation air bag, clutch release slave cylinder are cylindrical shape; Two ends at the cylindrical shape clutch release slave cylinder are provided with end cap, and one of them end cap has center hole, in the center hole of end cap, are provided with seal arrangement and bearing; Piston places in the clutch release slave cylinder; The compensation air bag is fixed on the bottom of clutch release slave cylinder one end, in clutch release slave cylinder, has been full of magneto-rheological grease, and it is characterized in that: said piston is an oval ball shape; The minor axis of oval ball piston is less than the internal diameter of clutch release slave cylinder and leave the flow gap of magneto-rheological grease; The major axis of oval ball piston is wound with two groups of field coils less than the length of clutch release slave cylinder on the oval ball piston, two groups of field coils distribute and place the both sides of oval ball piston minor axis respectively along the major axis of oval ball piston; Outside field coil, add protective layer, protective layer flushes with the periphery wall of oval ball piston; One end of piston rod is fixed on an end of oval ball piston; The shaft axis of piston rod is coaxial with the major axis of oval ball piston; The other end of piston rod stretches out in clutch release slave cylinder through the center hole on the clutch release slave cylinder end cap; The center of piston rod is porose, and the lighting outlet of field coil leads to outside the clutch release slave cylinder through the center hole of piston rod.

Owing to taked technique scheme; Make gap between the inner circle wall of periphery wall and clutch release slave cylinder of oval ball piston at the axial annular gap that forms a gradual change of oval ball piston major axis; Piston rod when driving the oval ball piston and in clutch release slave cylinder, move, because of the oval ball piston less at the diameter at the two ends of long axis direction, and oval ball piston outer wall and clutch release slave cylinder inwall between annular gap bigger; Make the extruding force that the magneto-rheological grease of an end receives in the clutch release slave cylinder bigger; The oval ball piston is got into comparalive ease and push the magneto-rheological grease of an end in the clutch release slave cylinder, simultaneously, leakage field is bigger greatly because of annular gap here; Viscosity magneto-rheological grease is lower so the magnetic intensity here is less; The magneto-rheological grease that makes an end in the clutch release slave cylinder can more easily flow along the annular gap between oval ball piston periphery wall and the clutch release slave cylinder inner circle wall, therefore after receiving the extruding of oval ball piston; Compare with existing MR damper, the working state of single outstretch pole magnetorheological fat damper when being working medium with the magneto-rheological grease of the utility model is better.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Fig. 2 is the A-A sectional view among Fig. 1.

Fig. 3 is the B-B sectional view among Fig. 1.

Fig. 4 is the C-C sectional view among Fig. 1.

Embodiment

Specify the structure of the utility model below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 2, this is a kind of concrete structure of the utility model, a kind of single outstretch pole magnetorheological fat damper; It comprises: piston rod 1, piston 8, clutch release slave cylinder 6 and be filled with the compensation air bag 14 of pressurized air 15, and clutch release slave cylinder 6 is a cylindrical shape, is provided with end cap 5 and end cap 18 at the two ends of cylindrical shape clutch release slave cylinder 6; End cap 5 has center hole 19; In the center hole 19 of end cap 5, be provided with seal arrangement 4 and bearing 3, piston 8 places in the clutch release slave cylinder 6, and compensation air bag 14 is fixed on the bottom of clutch release slave cylinder 6 right-hand members; In clutch release slave cylinder 6, be full of magneto-rheological grease 7; Piston 8 is an oval ball shape, and the minor axis of oval ball piston 8 is less than the internal diameter of clutch release slave cylinder 6 and leave the flow gap 20 of magneto-rheological grease 7, and the major axis of oval ball piston 8 is less than the length of clutch release slave cylinder 6; On oval ball piston 8, be wound with field coil 9 and field coil 12; Field coil 9 and field coil 12 distribute and place the both sides of oval ball piston 8 minor axises respectively along the major axis of oval ball piston 8, and at outer protective layer 10 and the protective layer 13 of adding of field coil 9 and field coil 12, protective layer 10 and protective layer 13 flush with the periphery wall of oval ball piston 8; One end of piston rod 1 is fixed on an end of oval ball piston 8; The shaft axis of piston rod 1 is coaxial with the major axis of oval ball piston 8; The other end of piston rod 1 stretches out in clutch release slave cylinder 6 through the center hole 19 on clutch release slave cylinder 6 end caps 5; Center hole 2 is arranged on the piston rod 1, and the center hole 2 of the lighting outlet 16 of magnetic coil 9 and field coil 12 through the fairlead on the oval ball piston 8 11 and fairlead 21 and piston rod 1 leads to that clutch release slave cylinder 6 is outer to join with control power supply 17.

The working condition of single outstretch pole magnetorheological fat damper is such: referring to Fig. 1; When control power supply 17 when the field coil on oval ball piston 89 is not with field coil 12 output currents; Magnetic intensity between oval ball piston 8 periphery walls and clutch release slave cylinder 6 inner circle walls in the gap 20 is zero; So the viscosity of magneto-rheological grease 7 is lower in the clutch release slave cylinder 6, when piston rod 1 drive oval ball piston 8 moves right in clutch release slave cylinder 6; The magneto-rheological grease 7 of right-hand member is under the extruding of oval ball piston 8 right-hand members in the clutch release slave cylinder 6; To flow (referring to Fig. 3 and Fig. 4) along oval ball piston 8 periphery walls and this annular gap that reduces gradually 20 of clutch release slave cylinder 6 inner circle walls, after through oval ball piston 8 minor axis places and this minimum annular gap 20 of clutch release slave cylinder 6 internal diameters, enter into the left end in the clutch release slave cylinder 6; At this moment, it is less that piston rod 1 drives the damping force that receives when oval ball piston 8 moves right in clutch release slave cylinder 6; When controlling power supply 17 behind field coil on the oval ball piston 89 and field coil 12 output currents; Because vary in size (referring to Fig. 2, Fig. 3 and Fig. 4) of the annular gap 20 between clutch release slave cylinder 6 inner circle walls and oval ball piston 8 periphery walls; Therefore; Its magnetic intensity is also different; Maximum in annular gap 20 minimums (referring to Fig. 2) at oval ball piston 8 minor axis places thereby the magnetic intensity here, magnetic intensity reduces gradually with the increase gradually (referring to Fig. 3 and Fig. 4) of annular gap 20 after leaving oval ball piston 8 minor axises, therefore; The viscosity of the magneto-rheological grease 7 in the annular gap 20 in clutch release slave cylinder 6 between oval ball piston 8 periphery walls and clutch release slave cylinder 6 inner circle walls is different; Therefore, when piston rod 1 drive oval ball piston 8 moved right in clutch release slave cylinder 6, the magneto-rheological grease 7 of right-hand members was under the extruding of oval ball piston 8 right-hand members in the clutch release slave cylinder 6; Make the left end of magneto-rheological grease 7 in the annular gap that increases gradually through a magnetic intensity 20 enters into clutch release slave cylinder 6 that right-hand member is squeezed in the clutch release slave cylinder 6; It is bigger to make piston rod 1 drive the damping force that receives when oval ball piston 8 moves right in clutch release slave cylinder 6, regulates the size of current of control power supply 17 outputs and can adjust the damping force size that receives when piston rod 1 drive oval ball piston 8 moves right in clutch release slave cylinder 6, makes the output damping force of single outstretch pole magnetorheological fat damper controlled; To drive oval ball piston 8 situation during to left movement in clutch release slave cylinder 6 similar with it when piston rod 1, repeats no more here.

Claims

1. single outstretch pole magnetorheological fat damper, it comprises: piston rod, piston, clutch release slave cylinder and compensation air bag, said clutch release slave cylinder are cylindrical shape; Two ends at the cylindrical shape clutch release slave cylinder are provided with end cap, and one of them end cap has center hole, and the internal diameter of center hole is greater than the external diameter of piston rod; In center hole, be provided with seal arrangement and bearing, said piston places in the clutch release slave cylinder, and said compensation air bag is fixed on the bottom of clutch release slave cylinder one end; In clutch release slave cylinder, be full of magneto-rheological grease; It is characterized in that: said piston is an oval ball shape, and the minor axis of oval ball piston is less than the internal diameter of clutch release slave cylinder and leave the flow gap of magneto-rheological grease, and the major axis of oval ball piston is less than the length of clutch release slave cylinder; On the oval ball piston, be wound with two groups of field coils; Two groups of field coils distribute and place the both sides of oval ball piston minor axis respectively along the major axis of oval ball piston, outside field coil, add protective layer, and protective layer flushes with the periphery wall of oval ball piston; One end of said piston rod is fixed on an end of oval ball piston, and the shaft axis of piston rod is coaxial with the major axis of oval ball piston, and the other end of piston rod stretches out in clutch release slave cylinder through the center hole on the clutch release slave cylinder end cap.

2. a kind of single outstretch pole magnetorheological fat damper as claimed in claim 1 is characterized in that the center of said piston rod is porose, and the lighting outlet of said field coil leads to outside the clutch release slave cylinder through the center hole of piston rod.