Magnetorheological damper

Abstract

The utility model relates to the technical field of dampers, in particular to a magneto-rheological damper which comprises a magneto-rheological cylinder body, a piston rod is movably arranged in the magneto-rheological cylinder body, one end of the piston rod penetrates out of the magneto-rheological cylinder body, and guide sealing assemblies are arranged at the two ends of the magneto-rheological cylinder body. The guide sealing assembly comprises a first sealing ring arranged in the magnetorheological cylinder body, the piston rod is sleeved with the first sealing ring, a mounting groove is formed in one side of the first sealing ring, and a spring ring is arranged in the mounting groove. The spring ring is used for applying elastic acting force to the first sealing ring so that the inner wall of the first sealing ring and the side wall of the piston rod can be kept in an abutting state.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, and particularly relates to a magnetorheological damper. Background Art

[0002] A magnetorheological damper is a semi-active control device that uses magnetorheological fluid as the working medium. Magnetorheological fluid is a suspension liquid formed by dispersing fine soft magnetic particles in a carrier liquid and having controllable rheological properties with the change of an externally applied magnetic field; when the magnetorheological fluid is subjected to a magnetic field, its viscosity coefficient will increase accordingly, and when it is subjected to a strong magnetic field, it will become a state similar to "solid", the fluidity disappears, and once the magnetic field is removed, it becomes a fluid that can flow again. The magnetorheological damper utilizes the rheological properties of the magnetorheological fluid, and a damping channel with a magnetic field is arranged on the damper. When the piston of the damper moves relative to the cylinder block, the magnetorheological fluid in the cylinder will be squeezed and flow through the damping channel. When there is no magnetic field acting on the damping channel, the magnetorheological fluid behaves as a viscous fluid. If a magnetic field is applied to the damping channel, the magnetorheological fluid in the damping channel hardens into a viscoplastic body, resulting in an increase in the damping force of the piston movement. Adjusting the magnetic field strength can change the yield strength of the magnetorheological fluid, thereby adjusting the magnitude of the damping force of the damper.

[0003] However, generally, a sealing structure is arranged at both ends of the cylinder block. The sealing structure adopts a single sealing ring, and the sealing ring has no special structure. After the soft magnetic particles in the magnetorheological fluid rub against the inner wall of the sealing ring for a long time, the sealing ring is easily damaged, which may cause the magnetorheological fluid to leak out, resulting in sealing problems. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a magnetorheological damper.

[0005] The utility model is realized by the following technical solutions.

[0006] A magnetorheological damper includes a magnetorheological cylinder block, a piston rod is movably arranged in the magnetorheological cylinder block, one end of the piston rod penetrates out of the magnetorheological cylinder block, guiding and sealing assemblies are arranged at both ends of the magnetorheological cylinder block, the guiding and sealing assemblies include a first sealing ring arranged in the magnetorheological cylinder block, the first sealing ring is sleeved on the piston rod, an installation groove is arranged on one side of the first sealing ring, and a spring ring is arranged in the installation groove. The spring ring is used to apply an elastic acting force to the first sealing ring so that the inner wall of the first sealing ring keeps abutting against the side wall of the piston rod.

[0007] As a further improvement of the present utility model, a first deformation part is arranged inside the first sealing ring, the first deformation part abuts against the side wall of the piston rod, and the first deformation part is used for elastically deforming to one side when the first sealing ring is subjected to the elastic acting force of the spring ring.

[0008] As a further improvement of the present utility model, the guiding and sealing assembly further includes a guiding seat arranged inside the magnetorheological cylinder body, a locking member is arranged on one side of the guiding seat, the locking member is used for restricting the guiding seat inside the magnetorheological cylinder body, the first sealing ring is arranged between the guiding seat and the locking member, and the installation groove is formed on the side of the first sealing ring close to the guiding seat.

[0009] As a further improvement of the present utility model, an avoidance groove is arranged on the side of the guiding seat close to the first sealing ring, and the avoidance groove is used for avoiding the spring ring.

[0010] As a further improvement of the present utility model, the guiding seat is provided with a first communication hole for communicating the avoidance groove with the inner cavity of the magnetorheological cylinder body.

[0011] As a further improvement of the present utility model, an inclined slope is arranged on the side of the first sealing ring having the installation groove, and the inclined slope extends from the side wall of the installation groove towards the outer side wall of the first sealing ring.

[0012] As a further improvement of the present utility model, a second deformation part is arranged outside the first sealing ring.

[0013] As a further improvement of the present utility model, a gasket is arranged between the first sealing ring and the locking member.

[0014] As a further improvement of the present utility model, a receiving groove is arranged on the side of the first sealing ring close to the locking member, and a support member is arranged inside the receiving groove.

[0015] As a further improvement of the present utility model, the locking member is threadedly connected to the magnetorheological cylinder body.

[0016] Advantages of the present utility model: An installation groove and a spring ring are arranged on the first sealing ring in the present utility model, the spring ring applies an elastic acting force to the first sealing ring, so that the inner wall of the first sealing ring and the side wall of the piston rod can maintain an abutting state, and it is possible to prevent the magnetorheological fluid from passing through the gap between the first sealing ring and the piston rod, thereby achieving the effect of preventing the magnetorheological fluid from leaking. Description of the Drawings

[0017] The following will describe in detail the preferred embodiments of the present utility model through the drawings to help understand the purpose and advantages of the present utility model, wherein:

[0018] Figure 1 Structural schematic diagram of the embodiment of the present utility model;

[0019] Figure 2 In the embodiment of the present utility model corresponding to Figure 1 Partial enlarged view of part A in;

[0020] Figure 3 Structural schematic diagram of the first sealing ring in the embodiment of the present utility model. Specific embodiments

[0021] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0022] In this specification, the orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structures shown in the respective drawings. The terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0023] Refer to Figures 1 to 3 what is disclosed by the embodiment of the present utility model is:

[0024] A magnetorheological damper, comprising a magnetorheological cylinder body 1, the magnetorheological cylinder body 1 having an inner cavity, a magnetorheological fluid being provided in the magnetorheological cylinder body 1, a piston 11 being movably provided in the magnetorheological cylinder body 1, the piston 11 dividing the inner cavity of the magnetorheological cylinder body 1 into a first chamber 12 and a second chamber 13, a magnetorheological channel 14 for communicating the first chamber 12 and the second chamber 13 being provided on the piston 11. In addition, a coil 15 is wound around the outside of the magnetorheological cylinder body 1, the coil 15 being connected to a control device and a power supply, piston rods 2 being respectively connected to both sides of the piston 11 by means of threads, and one end of each piston rod 2 extending out of the magnetorheological cylinder body 1.

[0025] In this embodiment, guide and seal assemblies are provided at both ends of the magnetorheological cylinder body 1 for guiding the piston rod 2 to move linearly and sealing the magnetorheological fluid in the magnetorheological cylinder body 1 to prevent the magnetorheological fluid from leaking out of the magnetorheological cylinder body 1. Specifically, the guide and seal assembly includes a first sealing ring 3 disposed inside the magnetorheological cylinder body 1. The first sealing ring 3 is sleeved on the piston rod 2. An installation groove 301 is provided on one side of the first sealing ring 3. A spring ring 4 is disposed in the installation groove 301. The spring ring 4 is used to apply an elastic force to the first sealing ring 3 so that the inner wall of the first sealing ring 3 remains in contact with the side wall of the piston rod 2. Under the action of the elastic force of the spring ring 4, the inner wall of the first sealing ring 3 always remains in contact with the side wall of the piston rod 2. During the process that one end of the piston rod 2 extends out of and moves within the magnetorheological cylinder body 1, the two always remain in contact, thereby preventing the magnetorheological fluid from leaking.

[0026] In addition, a first deformation portion 302 is provided inside the first sealing ring 3. The first deformation portion 302 abuts against the side wall of the piston rod 2. The first deformation portion 302 is used to elastically deform to one side when the first sealing ring 3 is subjected to the elastic force of the spring ring 4. Specifically, in this embodiment, the first deformation portion 302 deforms toward the inner cavity side of the magnetorheological cylinder body 1, so that the inner wall of the first sealing ring 3 and the side wall of the piston rod 2 are in closer contact with each other.

[0027] In this embodiment, the guide and seal assembly further includes a guide seat 5 disposed inside the magnetorheological cylinder body 1. A locking member 6 is provided on one side of the guide seat 5. The locking member 6 is used to limit the guide seat 5 within the magnetorheological cylinder body 1. The first sealing ring 3 is disposed between the guide seat 5 and the locking member 6. The installation groove 301 is formed on the side of the first sealing ring 3 close to the guide seat 5. Among them, the piston rod 2 passes through the guide seat 5 and the locking member 6, and the channel of the guide seat 5 through which the piston rod 2 passes is concentric with the piston rod 2 and has a diameter equal to its outer diameter, so that the piston rod 2 can move linearly during movement, thereby realizing the guiding function.

[0028] During installation, first install the guide seat 5, then install the first sealing ring 3, and finally install the locking member 6, so that both sides of the first sealing ring 3 can respectively abut against the side walls of the guide seat 5 and the locking member 6, thereby restricting the guide seat and the first sealing ring 3 from separating from the magnetorheological cylinder body 1. During the installation process, in order to avoid contact between the guide seat 5 and the spring ring 4, which may cause damage to the spring, and in order to reserve a deformation space for the first deformation portion 302, an avoidance groove 7 is provided on the side of the guide seat 5 close to the first sealing ring 3. The avoidance groove 7 is used to avoid the spring ring 4.

[0029] The guiding seat 5 is provided with a first communication hole 8 for communicating the avoidance groove 7 with the inner cavity of the magnetorheological cylinder body 1.

[0030] On one side of the mounting groove 301 of the first sealing ring 3, there is an inclined slope 303, and the inclined slope 303 extends from the side wall of the mounting groove 301 towards the outer side wall of the first sealing ring 3; and a second deformation part 304 is arranged on the outer side of the first sealing ring 3.

[0031] As a further improvement, a gasket 9 is arranged between the first sealing ring and the locking member 6.

[0032] A receiving groove is arranged on one side of the first sealing ring close to the locking member 6, and a support member 10 is arranged in the receiving groove.

[0033] In order to facilitate the connection between the locking member 6 and the magnetorheological cylinder body 1, the locking member 6 and the magnetorheological cylinder body 1 are connected by threads.

[0034] The working principle of the magnetorheological damper in this embodiment: During the reciprocating movement of the piston 11, the magnetorheological fluid in the magnetorheological cylinder body 1 enters from the first chamber 12 / second chamber 13 into the second chamber 13 / first chamber 12 through the magnetorheological channel 14. The current magnitude of the coil 15 is controlled by a controller (the method of controlling the current magnitude is a conventional technical means in the art and will not be described herein). Thus, the magnetic field generated by the coil 15 changes with the change of the current. Since the viscosity of the magnetorheological fluid changes with the strength of the magnetic field, the resistance received by the piston 11 during the reciprocating movement changes; generally speaking, the larger the current, the stronger the magnetic field generated by the coil, the greater the viscosity of the magnetorheological fluid, and the greater the resistance received by the piston 11 during the reciprocating movement. On the contrary, the smaller the current, the smaller the resistance received by the piston 11 during the reciprocating movement.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetorheological damper, comprising a magnetorheological cylinder body (1), a piston rod (2) is movably arranged in the magnetorheological cylinder body (1), one end of the piston rod (2) extends out of the magnetorheological cylinder body (1), and guide seal assemblies are arranged at both ends of the magnetorheological cylinder body (1), characterized in that: The guiding and sealing assembly includes a first sealing ring (3) disposed inside the magnetorheological cylinder body (1). The first sealing ring (3) is sleeved on the piston rod (2). An installation groove (301) is provided on one side of the first sealing ring (3). A spring ring (4) is disposed in the installation groove (301). The spring ring (4) is used to apply an elastic force to the first sealing ring (3) so that the inner wall of the first sealing ring (3) remains in contact with the side wall of the piston rod (2).

2. The magnetorheological damper according to claim 1, characterized in that: A first deformation part (302) is provided inside the first sealing ring (3). The first deformation part (302) abuts against the side wall of the piston rod (2). The first deformation part (302) is used to elastically deform to one side when the first sealing ring (3) is subjected to the elastic force of the spring ring (4).

3. The magnetorheological damper according to claim 2, wherein: The guiding and sealing assembly further includes a guiding seat (5) disposed inside the magnetorheological cylinder body (1). A locking member (6) is provided on one side of the guiding seat (5). The locking member (6) is used to limit the guiding seat (5) inside the magnetorheological cylinder body (1). The first sealing ring (3) is disposed between the guiding seat (5) and the locking member (6). The installation groove (301) is formed on the side of the first sealing ring (3) close to the guiding seat (5).

4. A magnetorheological damper according to claim 3, characterized in that: An avoidance groove (7) is provided on the side of the guiding seat (5) close to the first sealing ring (3). The avoidance groove (7) is used to avoid the spring ring (4).

5. A magnetorheological damper according to claim 4, characterized in that: The guiding seat (5) is provided with a first communication hole (8) for communicating the avoidance groove (7) with the inner cavity of the magnetorheological cylinder body (1).

6. The magnetorheological damper according to claim 2, wherein: An inclined slope (303) is provided on the side of the first sealing ring (3) having the installation groove (301). The inclined slope (303) extends from the side wall of the installation groove (301) towards the outer side wall of the first sealing ring (3).

7. A magnetorheological damper according to claim 6, characterized in that: A second deformation part (304) is provided outside the first sealing ring (3).

8. A magnetorheological damper according to claim 3, characterized in that: A gasket (9) is provided between the first sealing ring and the locking member (6).

9. A magnetorheological damper according to claim 3, characterized in that: A receiving groove is provided on the side of the first sealing ring close to the locking member (6). A support member (10) is disposed in the receiving groove.

10. A magnetorheological damper according to claim 3, characterized in that: The locking member (6) is threadedly connected to the magnetorheological cylinder body (1).

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