CN105156559A - Single-rod variable-cylinder-body passive double-control variable-damping magnetorheological damper - Google Patents

Abstract

The invention discloses a single-rod variable cylinder passive dual-control variable damping magnetorheological damper, which belongs to the field of variable damping magnetorheological fluid instruments. It includes a gradient rheological fluid cylinder, a left end cover module, a right end cover module, a magnet piston module, a magnetorheological fluid and a working gap; the left end cover module and the right end cover module are respectively installed at both ends of the gradient rheological fluid cylinder; The magnet piston module is installed inside the gradient rheological fluid cylinder; the magnet piston module includes a piston body, a piston rod with a piston body at one end and a piston rod extending to the outside of the gradient rheological fluid cylinder through a bearing at the other end, the first magnet of the piston, and the piston The second magnet, the first protective layer of the piston and the second protective layer of the piston; the diameter of the piston body is between the maximum inner diameter and the smallest inner diameter of the gradient rheological fluid cylinder. The invention is a variable damping magneto-rheological damper with simple and reasonable structure, zero current and large damping force, no need to consume electric energy, and no particle settlement.

Description

Single-rod variable cylinder passive dual-control variable damping magneto-rheological damper

technical field

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

Background technique

The magnetorheological damper can use the magnetorheological fluid to quickly realize the changeable rheological characteristics of liquid and semi-solid under the action of a magnetic field, and realize continuously adjustable and controllable damping force. The magnetorheological damper in the prior art utilizes the magnetic field generated by the exciting coil to change the damping force of the magnetorheological fluid flowing in the constant working gap. Although the magnetorheological damper in the prior art realizes variable damping, there are still certain defects: (1) The constant working gap leads to a small damping force under zero current state; (2) The energy consumption of the exciting coil is large when it is energized , It is easy to cause suspended particles to settle when the power is off.

Contents of the invention

The technical problem to be solved by the present invention is: aiming at the technical problems existing in the prior art, the present invention provides a variable damping magneto-rheological damper with simple and reasonable structure, zero current and large damping force, no need to consume electric energy, and no particle settlement.

In order to solve the above problems, the solution proposed by the present invention is: a single-rod variable cylinder passive dual-control variable damping magneto-rheological damper, which includes a gradient rheological fluid cylinder, a left end cover module, a right end cover module, and a magnet piston module , magnetorheological fluid and working gap; the left end cover module and the right end cover module are respectively installed at both ends of the gradient rheological fluid cylinder; the magnet piston module is installed on the gradient rheological fluid the inside of the cylinder.

The gradient rheological fluid cylinder of the present invention is a hollow cylinder with the smallest inner diameter at both ends, the largest inner diameter at the middle, and the inner diameter of the remaining part changes linearly; The first magnet of the end cover in the groove, the first magnet protective layer installed on the first magnet of the end cover; the right end cover module includes the right end cover body, the bearing hole arranged on the right end cover body, The bearing located in the bearing hole, the second magnet of the end cover installed on the inside of the right end cover body, the second magnet protection layer installed on the second magnet of the end cover; the magnet piston module includes The piston body, one end is provided with the piston rod whose other end of the piston body extends to the outside of the gradient rheological fluid cylinder through the bearing, the first magnet of the piston, the second magnet of the piston, the first protective layer of the piston, and the second piston of the piston. The protective layer.

The first magnet of the piston and the second magnet of the piston of the present invention are respectively installed in the grooves on the left and right sides of the piston body; the first protective layer of the piston and the second protective layer of the piston are respectively installed in The first magnet of the piston and the second magnet of the piston; the diameter of the piston body is between the maximum inner diameter and the smallest inner diameter of the gradient rheological fluid cylinder; the outer peripheral wall of the piston body and the The gap between the inner peripheral walls of the gradient rheological fluid cylinder constitutes the working gap for the flow of the magnetorheological fluid.

Compared with the prior art, the present invention has the advantages that: the single-rod variable cylinder passive dual-control variable damping magnetorheological damper of the present invention is provided with a gradient rheological fluid cylinder and a piston body with a gradually changing inner diameter, and the piston body The diameter is between the maximum value and the minimum value diameter of the internal diameter of the gradient rheological fluid cylinder. When the magnet piston module moves, the working gap gradually decreases from the maximum value to zero, and the corresponding damping force gradually increases; the invention also has an end The first magnet of the cover, the second magnet of the end cover, the first magnet of the piston and the second magnet of the piston make the gradient rheological fluid cylinder all in the magnetic field, effectively preventing the settlement of suspended particles in the magnetorheological fluid. It can be seen that the present invention has a simple and reasonable structure, does not need to consume electric energy, realizes zero current and large damping force, and effectively solves the problem of settling of suspended particles.

Description of drawings

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

Fig. 2 is a schematic diagram of the structure and principle of the magnet-piston module of the present invention.

In the figure, 1—gradient rheological fluid cylinder; 2—left end cover module; 21—left end cover body; 22—first magnet of end cover; 23—first magnet protection layer; 3—magnet piston module; 31—piston body ; 32—the first magnet of the piston; 33—the first protective layer of the piston; 34—the second magnet of the piston; 35—the second protective layer of the piston; 36—the piston rod; 4—the right end cover module; Bearing hole; 43—bearing; 44—the second magnet of the end cover; 45—the second magnet protective layer; 5—working gap; 6—magnetorheological fluid.

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 passive dual-control variable damping magnetorheological damper of the present invention includes a gradient rheological fluid cylinder 1, a left end cover module 2, a right end cover module 4, a magnet piston module 3, The magnetorheological fluid 6 and the working gap 5; the left end cover module 2 and the right end cover module 4 are respectively installed at both ends of the gradient rheological fluid cylinder 1; the magnet piston module 3 is installed inside the gradient rheological fluid cylinder 1 .

Referring to Figures 1 and 2, the gradient rheological fluid cylinder 1 is a hollow cylinder with the smallest inner diameter at both ends, the largest inner diameter at the middle, and a linear change in the inner diameter of the rest; the left end cover module 2 includes a left end cover body 21, installed on The first magnet of the end cover in the inner groove of the left end cover body 21, the first magnet protection layer 23 installed on the first magnet 22 of the end cover; The bearing hole 42, the bearing 43 installed in the bearing hole 42, the second magnet 44 of the end cover installed on the inside of the right end cover body 41, the second magnet protective layer 45 installed on the second magnet 44 of the end cover; The magnet piston module 3 includes a piston body 31, a piston rod 36 with a piston body 31 at one end and a piston rod 36 extending to the outside of the gradient rheological fluid cylinder 1 through a bearing 43 at the other end, a piston first magnet 32, a piston second magnet 34, and a piston first magnet. The protective layer 33 and the second protective layer 35 of the piston; the first magnet 32 of the piston and the second magnet 34 of the piston are respectively installed in the grooves on the left and right sides of the piston body 31; the first protective layer 33 of the piston and the second protective layer of the piston 35 are mounted on the piston first magnet 32 and the piston second magnet 34 respectively.

The diameter of the piston body 31 is between the maximum inner diameter and the smallest inner diameter of the gradient rheological fluid cylinder 1; the gap between the outer peripheral wall of the piston body 31 and the inner peripheral wall of the gradient rheological fluid cylinder 1 constitutes the magnetorheological fluid 6 Flowing working gap 5; when the magnet-piston module 3 moves, the working gap 5 gradually decreases from the maximum value to zero, and the corresponding damping force gradually increases from the minimum value.

Claims (1)

1. Single-rod variable cylinder passive dual-control variable damping magneto-rheological damper, characterized in that it includes a gradient rheological fluid cylinder (1), a left end cover module (2), a right end cover module (4), and a magnet piston Module (3), magnetorheological fluid (6) and working gap (5); the left end cover module (2) and the right end cover module (4) are respectively installed in the gradient rheological fluid cylinder (1 ) at both ends; the magnet piston module (3) is installed inside the gradient rheological fluid cylinder (1); the gradient rheological fluid cylinder (1) has the smallest inner diameter at both ends and the middle inner diameter The largest and the remaining parts are hollow cylinders with linearly changing inner diameters; the left end cap module (2) includes a left end cap body (21), a first end cap magnet installed in the inner groove of the left end cap body (21), The first magnet protective layer (23) installed on the first magnet (22) of the end cover; the right end cover module (4) includes a right end cover body (41), which is located on the right end cover body (41) The bearing hole (42) on the top, the bearing (43) installed in the bearing hole (42), the second magnet (44) of the end cover installed on the inside of the right end cover body (41), and the second magnet (44) installed in the right end cover body (41) The second magnet protection layer (45) on the second magnet (44) of the end cover; the magnet piston module (3) includes a piston body (31), one end is provided with the piston body (31) and the other end passes through the The bearing (43) extends to the piston rod (36) outside the gradient rheological fluid cylinder (1), the first magnet (32) of the piston, the second magnet (34) of the piston, and the first protective layer (33) of the piston and the second protective layer (35) of the piston; the first magnet (32) of the piston and the second magnet (34) of the piston are respectively installed in the grooves on the left and right sides of the piston body (31); The first protective layer (33) of the piston and the second protective layer (35) of the piston are installed on the first magnet (32) of the piston and the second magnet (34) of the piston respectively; the piston body ( The diameter of 31) is between the maximum inner diameter and the smallest inner diameter of the gradient rheological fluid cylinder (1); the outer peripheral wall of the piston body (31) and the inner peripheral wall of the gradient rheological fluid cylinder (1) The gap between them constitutes the working gap (5) where the magnetorheological fluid (6) flows.