CN105179567A - Single-rod variable-cylinder-body active single-control variable-damping magnetorheological damper - Google Patents

Abstract

The invention discloses a single-rod variable-cylinder-body active single-control variable-damping magnetorheological damper and belongs to the field of magnetorheological fluid instruments with the variable-damping vibration isolation function. The magnetorheological damper comprises a working cylinder body module, an imporous cylinder body cover, a porous cylinder body cover, a piston module, a working clearance, magnetorheological fluid and a power source. The working cylinder body module comprises a working cylinder inner core, a coil and an electric field shielding layer. The working cylinder inner core is a hollow cylinder, and the internal diameter of the working cylinder inner core linearly changes along the axis of the working cylinder inner core. The working clearance is the clearance between the outer circumferential wall of a piston and the inner circumferential wall of the working cylinder inner core and changes along with the position difference of the piston. The variable-damping magnetorheological damper is reasonable in structure and large in damping force adjusting range, the variable working clearance is achieved through a variable cylinder body, and fluid viscosity is controlled through the power source.

Description

Single rod variable cylinder active single control variable damping magnetorheological damper

technical field

The invention relates to the field of variable damping magnetorheological fluid instruments, in particular to a single-rod variable cylinder active single-control variable damping magnetorheological damper.

Background technique

Magneto-rheological damper is a semi-active vibration reduction instrument, which is widely used in structural vibration reduction control fields such as automobiles, bridges, and buildings, and plays an important role in structural vibration reduction. The existing magnetorheological damper changes the viscosity of the fluid through the application of an external magnetic field, so that the magnetorheological fluid obtains different damping forces through the working gap between the outer peripheral wall of the piston and the inner peripheral wall of the working cylinder. Although the existing magneto-rheological damper realizes variable damping, it still has certain disadvantages: the working gap between the outer peripheral wall of the piston and the inner peripheral wall of the working cylinder is constant, and the change of the damping force depends entirely on the change of the external magnetic field. The adjustment range of the damping force is difficult to expand.

Contents of the invention

The technical problem to be solved in the present invention is: aiming at the problems of the existing technology such as the limited range of damping force adjustment, the present invention provides a kind of valve with reasonable structure, variable cylinder body to realize variable working gap, power supply to control fluid viscosity, and extremely large damping force adjustment range. Large variable damping magnetorheological dampers.

In order to solve the above problems, the solution proposed by the present invention is: a single-rod variable cylinder active single-control variable damping magneto-rheological damper, which includes a working cylinder module, a non-porous cylinder cover, a hollow cylinder cover, a piston Modules, working gaps, magnetorheological fluids, power supplies.

The working cylinder module includes a working cylinder inner core, a coil installed on the outer circumference of the working cylinder inner core, and an electric field shielding layer installed outside the coil.

The inner core of the working cylinder is a hollow cylinder with the largest inner diameter in the middle perpendicular to the axis and the smallest inner diameter at both ends, and the inner diameter changes linearly along the axis.

The non-porous cylinder cover and the empty cylinder cover are installed at both ends of the working cylinder module, and the piston module is installed inside the working cylinder module; the piston module includes a piston rod, The piston installed on the left end of the piston rod, the guide holes symmetrically distributed on the piston, and two parallel to the piston rod are installed on the non-porous cylinder head and the empty cylinder through the guide holes. The guide rod between the body covers; the power supply is installed on the empty cylinder cover and connected to the coil through wires; the inner core of the working cylinder, the non-porous cylinder cover, and the empty cylinder cover The enclosed space is filled with the magnetorheological fluid; the other end of the piston rod extends to the outside of the working cylinder module through the sealing device and the bearing installed in the bearing hole.

The piston divides the inner core of the working cylinder into left and right parts, and the magnetorheological fluid flows left and right through the working gap; the working gap is the inner wall between the outer peripheral wall of the piston and the inner core of the working cylinder. The gap between the surrounding walls varies with the position of the piston.

Compared with the prior art, the present invention has the advantages that: the single-rod variable cylinder active single-control variable damping magneto-rheological damper of the present invention is provided with the inner core of the working cylinder and the energized coil. The working gap between the wall and the inner peripheral wall of the working cylinder core changes. It can be seen that the present invention has a reasonable structure, realizes variable damping by changing the working gap and fluid viscosity, and expands the range of damping force variation.

Description of drawings

Fig. 1 is a schematic diagram of the mechanism principle of the single-rod variable cylinder active single-control variable damping magneto-rheological damper of the present invention.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

In the figure, 1—working cylinder module; 11—inner core of working cylinder; 12—coil; 13—electric field shielding layer; 2—non-porous cylinder cover; 3—empty cylinder cover; 31—sealing device; 32— Bearing; 33—bearing hole; 4—piston module; 41—piston; 42—piston rod; 43—guiding rod; 44—guiding hole; 5—working gap; 6—magnetorheological fluid; 7—power supply.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, the single-rod variable cylinder active single-control variable damping magnetorheological damper of the present invention includes a working cylinder module 1, a non-porous cylinder cover 2, an empty cylinder cover 3, and a piston module 4 , working gap 5, magnetorheological fluid 6, power supply 7; working cylinder module 1 includes working cylinder inner core 11, coil 12 installed on the outer circumference of working cylinder inner core 11, electric field shielding installed outside coil 12 Layer 13.

The inner core 11 of the working cylinder is a hollow cylinder, the inner diameter of the middle part perpendicular to the axis is the largest, the inner diameter of both ends is the smallest, and the inner diameter changes linearly along its axis; the non-porous cylinder cover 2 and the hollow cylinder cover 3 are respectively installed in the working cylinder At both ends of the module 1, the piston module 4 is installed inside the working cylinder module 1; the piston module 4 includes a piston rod 42, a piston 41 installed at the left end of the piston rod 42, and guide holes 44 symmetrically distributed on the piston 41 , Two guide rods 43 parallel to the piston rod 42 are installed between the non-porous cylinder cover 2 and the empty cylinder cover 3 through the guide hole 44; the power supply 7 is installed on the empty cylinder cover 3, and passes through The wire is connected to the coil 12;

1 and 2, the closed space surrounded by the inner core 11 of the working cylinder, the non-porous cylinder cover 2 and the empty cylinder cover 3 is filled with the magnetorheological fluid 6; the other end of the piston rod 42 passes through the sealing device 31 1. The bearing 32 installed in the bearing hole 33 extends to the outside of the working cylinder module 1; the piston 41 divides the working cylinder inner core 11 into left and right parts, and the magnetorheological fluid 6 flows left and right through the working gap 5; The working gap 5 is the gap between the outer peripheral wall of the piston 41 and the inner peripheral wall of the working cylinder inner core 11 , which changes with the position of the piston 41 .

The principle of variable damping: the inner diameter of the inner core 11 of the working cylinder changes linearly along the axis. As the piston 41 moves away from the middle position, the gap between the outer peripheral wall of the piston 41 and the inner peripheral wall of the inner peripheral wall of the working cylinder 11 gradually becomes smaller, and the magnetorheological fluid The working gap 5 of 6 gradually decreases, and the damping force gradually increases; the power supply 7 changes the magnetic field strength inside the inner core 11 of the working cylinder through the coil 12, the viscosity of the magnetorheological fluid 6 changes, and the damping force changes accordingly.

Claims (1)

1. single pole becomes cylinder body active single control mutative damp MR damper, it is characterized in that: comprise working cylinder module (1), atresia cylinder body lid (2), be free cylinder body lid (3), piston modules (4), working clearance (5), magnetic flow liquid (6) and power supply (7); Described working cylinder module (1) comprises clutch release slave cylinder inner core (11), the coil (12) be installed on described clutch release slave cylinder inner core (11) excircle, be installed in the outside electric field shielding layer (13) of described coil (12); Described clutch release slave cylinder inner core (11) is hollow cylinder, and the middle part internal diameter perpendicular to axis is maximum, and two ends internal diameter is minimum, and internal diameter changes along its axis linearity; Described atresia cylinder body lid (2) and be free cylinder body lid (3) to be installed in the two ends of described working cylinder module (1) respectively, described piston modules (4) is installed in the inside of described working cylinder module (1); Described piston modules (4) comprises piston rod (42), be installed in the piston (41) of described piston rod (42) left end, be opened in the upper symmetrical pilot hole (44) of described piston (41), two be parallel to described piston rod (42) and be installed in described atresia cylinder body lid (2) by described pilot hole (44) and be the guide rod (43) between free cylinder body lid (3); Be described in described power supply (7) is installed on free cylinder body lid (3), and be connected with described coil (12) by wire; Described clutch release slave cylinder inner core (11), atresia cylinder body lid (2), be free cylinder body lid (3) to surround enclosed space in be full of described magnetic flow liquid (6); Described piston rod (42) the other end, by seal arrangement (31), the bearing (32) be installed in bearing hole (33), reaches the outside of described working cylinder module (1); Described clutch release slave cylinder inner core (11) is divided into left and right two-part by described piston (41), and described magnetic flow liquid (6) is by working clearance (5) left and right flowing; Gap between the periphery wall that the described working clearance (5) is described piston (41) and the inner circle wall of described clutch release slave cylinder inner core (11), the position with described piston (41) is different and change.