CN219299846U

CN219299846U - Sponge straight line type magneto-rheological damper

Info

Publication number: CN219299846U
Application number: CN202320701170.7U
Authority: CN
Inventors: 黄恺
Original assignee: Shenzhen Bohai New Material Technology Co ltd
Current assignee: Shenzhen Bohai New Material Technology Co ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-07-04
Anticipated expiration: 2033-04-03

Abstract

The utility model provides a sponge linear magnetorheological damper which comprises a piston cylinder, a piston rod, a wire core, a sponge body, a wire and an excitation coil, wherein the piston cylinder is arranged on the piston rod; the wire core is slidably arranged in the piston cylinder; the sponge body is circumferentially arranged on the wire core, and a gap is reserved between the sponge body and the inner wall of the piston cylinder; filling magnetorheological fluid in the inner pores of the sponge body; the width of the gap is smaller than or equal to the volume increment of the sponge body generated by the magnetic field change of the magnetorheological fluid; one end of the piston rod is arranged in the piston cylinder and connected with the wire core, and the other end of the piston rod is arranged outside the piston cylinder; the piston rod is provided with a central through hole for the lead to penetrate through; a groove for accommodating the exciting coil is formed in the wire core; and the wire core is provided with a pore canal for connecting the groove with the central through hole, and the wire is connected with the exciting coil through the pore canal. The initial damping force provided by the present utility model can be very small.

Description

Sponge straight line type magneto-rheological damper

Technical Field

The utility model relates to the technical field of dampers, in particular to a sponge linear magnetorheological damper.

Background

A damper is a device that utilizes damping characteristics to dampen mechanical vibrations, such as a linear magnetorheological damper. The existing linear magnetorheological damper fills the whole cylinder with magnetorheological fluid (Newtonian fluid with low viscosity when no magnetic field exists outside, and the magnetorheological fluid with high viscosity and low fluidity when an external magnetic field exists), so that even under the condition of no magnetic field, the initial damping force is difficult to be very small, and the application of the magnetorheological damper in many scenes is limited.

Disclosure of Invention

The utility model aims to provide a sponge linear magnetorheological damper, which has the following specific technical scheme:

a sponge linear magnetorheological damper comprises a piston cylinder, a piston rod, a wire core, a sponge body, a wire and an excitation coil;

the wire core is slidably arranged in the piston cylinder; the sponge body is circumferentially arranged on the wire core, and a gap is reserved between the sponge body and the inner wall of the piston cylinder; filling magnetorheological fluid in the inner pores of the sponge body; the width of the gap is smaller than or equal to the volume increment of the sponge body generated by the magnetic field change of the magnetorheological fluid;

one end of the piston rod is arranged in the piston cylinder and connected with the wire core, and the other end of the piston rod is arranged outside the piston cylinder; the piston rod is provided with a central through hole for the lead to penetrate through; a groove for accommodating the exciting coil is formed in the wire core; and the wire core is provided with a pore canal for connecting the groove with the central through hole, and the conducting wire is connected with the exciting coil through the pore canal.

Optionally, the sponge linear magnetorheological damper further comprises a first sealing end cover and a second sealing end cover which are arranged at two ends of the piston cylinder; the first sealing end cover and the second sealing end cover are respectively in threaded connection with the inner walls of the two ends of the piston cylinder.

Optionally, the sponge linear magnetorheological damper further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is arranged on the first sealing end cover and is clung to the piston cylinder; the second sealing ring is arranged on the second sealing end cover and is clung to the piston cylinder.

Optionally, the linear magnetorheological damper of sponge still includes crashproof gasket, crashproof gasket sets up on the piston rod, and with the sinle silk laminating.

Optionally, the sponge linear magnetorheological damper further comprises a guide ring, wherein the guide ring is arranged between the wire core and the inner wall of the piston cylinder and is in sliding contact with the inner wall of the piston cylinder; an annular groove for limiting the guide ring is formed in the wire core.

Optionally, the sponge linear magnetorheological damper further comprises a linear copper sleeve, the first sealing end cover or the second sealing end cover is provided with a mounting hole for mounting the linear copper sleeve, and the piston rod penetrates through the linear copper sleeve.

Optionally, the sponge linear magnetorheological damper further comprises a rotary joint, and the rotary joint is connected with one end of the piston rod, which is far away from the wire core; the rotary joint is provided with a connecting hole for the lead to penetrate.

The application of the technical scheme of the utility model has at least the following beneficial effects:

according to the sponge linear magnetorheological damper, when the lead is not electrified, the initial damping force of the piston rod driving the wire core to slide in the piston cylinder can be very small due to the fact that a gap exists between the sponge body and the inner wall of the piston cylinder; when the conducting wire is electrified, the exciting coil is connected with the conducting wire, so that a magnetic field is generated around the wire core, magnetic particles in magnetorheological fluid in the sponge body are orderly arranged along magnetic lines of force, the state of the magnetic particles is changed from fluid to viscoelastic solid, the volume of the sponge body is increased, and the sponge body is contacted with the inner wall of the piston cylinder, so that the effect of increasing damping force is achieved. Meanwhile, the sponge body has elasticity of the sponge, and can ensure that the small range of damping force is increased, so that the sponge body is suitable for application scenes in which the small range of damping force is required to be increased.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of a sponge linear magnetorheological damper in embodiment 1 of the present utility model;

wherein, 1, a piston cylinder, 2, a piston rod, 3, a wire core, 4, a cavernous body, 5, a wire, 6, an excitation coil, 7, a first sealing end cover, 8 and a second sealing end cover, 9, a first sealing ring, 10, a second sealing ring, 11, an anti-collision gasket, 12, a guide ring, 13, a straight copper bush, 14 and a rotary joint.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

Example 1:

referring to fig. 1, a sponge linear magnetorheological damper comprises a piston cylinder 1, a piston rod 2, a wire core 3, a sponge body 4, a wire 5 and an excitation coil 6;

the wire core 3 is slidably arranged in the piston cylinder 1; the sponge 4 is circumferentially arranged on the wire core 3, and a gap (the width of the gap is 0.2-0.3 mm) is reserved between the sponge and the inner wall of the piston cylinder 1; filling the inner pores of the sponge body 4 with magnetorheological fluid; the width of the gap is smaller than or equal to the volume increment of the sponge 4 caused by the magnetic field change of the magnetorheological fluid;

one end of the piston rod 2 is arranged in the piston cylinder 1 and is connected with the wire core 3, and the other end of the piston rod is arranged outside the piston cylinder 1; a central through hole for the lead 5 to penetrate is arranged on the piston rod 2; a groove for accommodating the exciting coil 6 is formed in the wire core 3; and a hole channel for connecting the groove with the central through hole is arranged on the wire core 3, and the conducting wire 5 is connected with the exciting coil 6 through the hole channel.

The sponge linear magnetorheological damper further comprises a first sealing end cover 7 and a second sealing end cover 8 which are arranged at two ends of the piston cylinder 1; the first sealing end cover 7 and the second sealing end cover 8 are respectively in threaded connection with the inner walls of the two ends of the piston cylinder 1.

The sponge linear magnetorheological damper further comprises a first sealing ring 9 and a second sealing ring 10, wherein the first sealing ring 9 is arranged on the first sealing end cover 7 and is tightly attached to the piston cylinder 1, so that when the first sealing end cover 7 is connected with the piston cylinder 1, the tightly attached sealing effect of the first sealing ring 9 on the piston cylinder 1 is improved; specifically, a first annular groove for installing a first sealing ring 9 is formed in the first sealing end cover 7; the second sealing ring 10 is arranged on the second sealing end cover 8 and is tightly attached to the piston cylinder 1, so that the tightly attached sealing effect of the second sealing ring 10 on the piston cylinder 1 is improved when the second sealing end cover 8 is connected with the piston cylinder 1; specifically, a second annular groove for installing a second seal ring 10 is provided on the second seal end cap 8.

The sponge linear magnetorheological damper further comprises an anti-collision gasket 11, wherein the anti-collision gasket 11 is arranged on the piston rod 2 and is attached to the wire core 3, and the anti-collision gasket is used for preventing the wire core 3 from directly colliding with the first sealing end cover 7 when sliding to the end part of the piston cylinder 1.

The sponge linear magnetorheological damper further comprises a guide ring 12, wherein the guide ring 12 is arranged between the wire core 3 and the inner wall of the piston cylinder 1 and is in sliding contact with the inner wall of the piston cylinder 1; an annular groove for limiting the guide ring 12 is arranged on the wire core 3.

The sponge linear magnetorheological damper further comprises a linear copper sleeve 13, the first sealing end cover 7 is provided with a mounting hole for mounting the linear copper sleeve 13, the piston rod 2 penetrates through the linear copper sleeve 13, the linear copper sleeve 13 provides a guiding function for the movement of the piston rod 2, and meanwhile direct friction between the piston rod 2 and the first sealing end cover 7 can be avoided.

The sponge linear magnetorheological damper further comprises a rotary joint 14, wherein the rotary joint 14 is connected with one end, far away from the wire core 3, of the piston rod 2; the rotary joint 14 is provided with a connecting hole for the lead 5 to penetrate, and the lead 5 penetrates through the connecting hole on the rotary joint 14 to be connected with a power supply.

The sponge linear magnetorheological damper is connected with an external part through the rotary joint 14 and the second sealing end cover 8 to participate in practical application.

The operation principle of the sponge linear magnetorheological damper is as follows:

1) When the lead 5 is not electrified, because a gap exists between the sponge 4 and the inner wall of the piston cylinder 1, the initial damping force of the piston rod 2 driving the wire core 3 to slide in the piston cylinder 1 can be very small;

2) When the conducting wire 5 is electrified, the exciting coil 6 is connected with the conducting wire 5, so that a magnetic field is generated around the wire core 3, magnetic particles in magnetorheological fluid in the sponge 4 are orderly arranged along magnetic lines, the state of the magnetic particles is changed from fluid to viscoelastic solid, the volume of the sponge 4 is increased, the sponge 4 is contacted with the inner wall of the piston cylinder 1 (in the contact process, only a small amount of magnetorheological fluid in the sponge 4 is extruded, and the extruded magnetorheological fluid is only adhered to the inner wall of the piston cylinder 1 and cannot flow to other places), so that the effect of increasing damping force is achieved.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The linear magnetorheological sponge damper is characterized by comprising a piston cylinder (1), a piston rod (2), a wire core (3), a sponge body (4), a wire (5) and an excitation coil (6);

the wire core (3) can be arranged in the piston cylinder (1) in a sliding way; the sponge body (4) is circumferentially arranged on the wire core (3), and a gap is reserved between the sponge body and the inner wall of the piston cylinder (1); filling the inner pores of the sponge body (4) with magnetorheological fluid; the width of the gap is smaller than or equal to the volume increment of the sponge body (4) caused by the magnetic field change of the magnetorheological fluid;

one end of the piston rod (2) is arranged in the piston cylinder (1) and is connected with the wire core (3), and the other end of the piston rod is arranged outside the piston cylinder (1); a central through hole for the penetration of a lead (5) is arranged on the piston rod (2); a groove for accommodating the exciting coil (6) is formed in the wire core (3); and the wire core (3) is provided with a pore canal for connecting the groove with the central through hole, and the conducting wire (5) is connected with the exciting coil (6) through the pore canal.

2. The sponge linear magnetorheological damper according to claim 1, further comprising a first sealing end cap (7) and a second sealing end cap (8) disposed at both ends of the piston cylinder (1); the first sealing end cover (7) and the second sealing end cover (8) are respectively in threaded connection with the inner walls of the two ends of the piston cylinder (1).

3. The linear sponge magnetorheological damper according to claim 2, further comprising a first sealing ring (9) and a second sealing ring (10), wherein the first sealing ring (9) is arranged on the first sealing end cover (7) and is tightly attached to the piston cylinder (1); the second sealing ring (10) is arranged on the second sealing end cover (8) and is tightly attached to the piston cylinder (1).

4. The sponge linear magnetorheological damper as claimed in claim 3 further comprising an anti-collision gasket (11), wherein the anti-collision gasket (11) is disposed on the piston rod (2) and is attached to the wire core (3).

5. The sponge linear magnetorheological damper according to any one of claims 2 to 4, further comprising a guide ring (12), the guide ring (12) being arranged between the wire core (3) and the inner wall of the piston cylinder (1) and in sliding contact with the inner wall of the piston cylinder (1); an annular groove for limiting the guide ring (12) is arranged on the wire core (3).

6. The sponge linear magnetorheological damper as claimed in claim 5 further comprising a linear copper sleeve (13), wherein the first seal end cap (7) or the second seal end cap (8) is provided with a mounting hole for mounting the linear copper sleeve (13), and the piston rod (2) is arranged through the linear copper sleeve (13).

7. The sponge linear magnetorheological damper as claimed in claim 6 further comprising a swivel joint (14), the swivel joint (14) being connected to an end of the piston rod (2) remote from the wire core (3); the rotary joint (14) is provided with a connecting hole for the lead (5) to penetrate.