Adjustable inerter damper

Abstract

The utility model relates to the technical field of vibration reduction and isolation, in particular to an adjustable inerter damper which comprises a cylinder barrel and a piston, the piston is movably arranged in the cylinder barrel in the axial direction of the cylinder barrel, a piston rod is connected to the piston, and the piston divides the cylinder barrel into a first cavity and a second cavity; the two ends of the communicating pipe are communicated with the first cavity and the second cavity respectively; magnetorheological damping fluid is arranged in the first cavity and the second cavity. And the outer barrel sleeve is movably arranged outside the cylinder barrel in the axial direction of the cylinder barrel, a permanent magnet is connected to the outer barrel sleeve, and the permanent magnet is used for adjusting the magnetic field intensity of the magnetorheological damping fluid. The characteristics of the magnetorheological damping fluid are utilized, the magnetic field intensity borne by the magnetorheological damping fluid in the communicating pipe is changed by changing the position relation between the permanent magnet and the communicating pipe, and therefore the viscosity of the magnetorheological damping fluid in the communicating pipe is changed, and damping force adjustment is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction and isolation, and in particular to an adjustable inertia capacity damper. Background Art

[0002] Liquid inertia viscous damper is a device that uses the inertia of liquid to reduce vibration. It usually consists of a sealed container and a liquid in it, and the liquid can flow freely in the container. Liquid inertia viscous damper produces a damping effect through the inertia of liquid movement.

[0003] In the existing inertial capacity damper, the viscosity of the damping fluid in the damper determines the damping force of the damper. Therefore, the damping force of the existing inertial capacity damper is fixed and difficult to adjust, so that the shock absorption performance of the same inertial capacity damper is limited. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the damping force of the existing inertial capacity damper is fixed, difficult to adjust, and has limited shock absorption performance.

[0005] To this end, the utility model provides an adjustable inertia damper.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] An adjustable inertia damper, comprising:

[0008] Cylinder, and

[0009] A piston, the piston is movably arranged in the cylinder along the axial direction of the cylinder, the piston is connected to a piston rod, and the piston divides the cylinder into a first cavity and a second cavity;

[0010] A connecting pipe, the two ends of which are connected to the first cavity and the second cavity respectively;

[0011] Wherein, magnetorheological damping fluid is arranged in the first cavity and the second cavity;

[0012] The outer sleeve is movably arranged outside the cylinder along the axial direction of the cylinder, and a permanent magnet is connected to the outer copper sleeve, and the permanent magnet is used to adjust the magnetic field strength of the magnetorheological damping fluid.

[0013] By adopting the above technical solution and utilizing the characteristics of magnetorheological damping fluid, the magnetic field strength to which the magnetorheological damping fluid in the connecting tube is subjected is changed by changing the positional relationship between the permanent magnet and the connecting tube, thereby changing the viscosity of the magnetorheological damping fluid in the connecting tube and achieving adjustment of the damping force.

[0014] Furthermore, the connecting pipe is configured to be spiral.

[0015] By adopting the above technical solution, the flow characteristics of the liquid in the spiral connecting tube are utilized. On the one hand, the flow path of the magnetorheological damping fluid in the connecting tube is increased. On the other hand, the inertia and friction resistance generated by the magnetorheological damping fluid flowing in the spiral connecting tube are utilized to absorb and reduce vibration.

[0016] Furthermore, the cylinder is provided with threads, the outer sleeve is provided with internal threads, the outer sleeve is threadedly connected to the cylinder, and the permanent magnet can be sleeved on the outside of the connecting pipe.

[0017] Furthermore, the inner wall of the outer sleeve is spaced apart from the outer wall of the cylinder, a mounting groove is provided on the inner wall of the outer sleeve, the mounting groove passes through one end of the outer sleeve, and the permanent magnet is arranged in the mounting groove.

[0018] Furthermore, the inner diameter of the outer sleeve is larger than the outer diameter of the orthographic projection of the connecting pipe in the plane where the diameter of the main cylinder is located.

[0019] Furthermore, a fixing ring is arranged in the installation groove, and the fixing ring is used to fix the permanent magnet.

[0020] Furthermore, the cylinder includes a main cylinder and a secondary cylinder, the piston is movably arranged in the main cylinder, the first cavity and the second cavity are arranged in the main cylinder, the secondary cylinder is coaxially connected to one end of the bottom of the main cylinder, one end of the piston rod extends out of the opening end of the main cylinder, and the other end passes through the bottom of the main cylinder and extends into the secondary cylinder, and the outer sleeve is threadedly connected to the secondary cylinder.

[0021] Furthermore, a guide sleeve is connected to the open end of the main cylinder, and the piston rod passes through the guide sleeve and is sealed to the guide sleeve.

[0022] Furthermore, a clamping nut is provided at the open end of the master cylinder, and the clamping nut is located at an end of the guide sleeve away from the bottom of the master cylinder, and the clamping nut is used to fix the guide sleeve in the master cylinder.

[0023] Furthermore, a through opening is provided at the bottom of the main cylinder, and a guide sleeve is also provided at the bottom of the main cylinder, and the piston rod passes through the guide sleeve and is sealedly connected to the guide sleeve.

[0024] Furthermore, a clamping nut is provided at the open end of the master cylinder, and the clamping nut is located at an end of the guide sleeve away from the bottom of the master cylinder, and the clamping nut is used to fix the guide sleeve in the master cylinder.

[0025] Furthermore, a through opening is provided at the bottom of the main cylinder, and a guide sleeve is also provided at the bottom of the main cylinder, and the piston rod passes through the guide sleeve and is sealedly connected to the guide sleeve.

[0026] The beneficial effect of the utility model is that the application combines the spiral connecting pipe structure and the liquid inertia damping principle, utilizes the flow characteristics of the liquid in the spiral connecting pipe, increases the flow path of the magnetorheological damping fluid in the connecting pipe, and utilizes the inertia and friction resistance generated by the flow of the magnetorheological damping fluid in the spiral connecting pipe to absorb and reduce vibration. At the same time, the characteristics of the magnetorheological damping fluid are utilized to adjust the damping force by changing the size of the magnetic field on the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] In the figure: 1. main cylinder; 10. first cavity; 11. second cavity; 12. piston; 13. piston rod; 14. rod end connecting earring; 15. guide sleeve; 16. clamping nut; 2. auxiliary cylinder; 20. cylinder end connecting earring; 3. outer sleeve; 30. mounting groove; 31. threaded cylinder; 32. permanent magnet; 33. fixing ring; 4. connecting pipe. DETAILED DESCRIPTION

[0030] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0031] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] An adjustable inertia damper includes a cylinder, a piston 12, a piston rod 13, a connecting pipe 4 and an outer sleeve 3. The cylinder includes a main cylinder 1 and a sub-cylinder 2. The sub-cylinder 2 is coaxially threadedly connected to the bottom of the main cylinder 1. A through port is provided at the bottom of the main cylinder 1. A guide sleeve 15 is connected to the bottom through port of the main cylinder 1 and the open end of the main cylinder 1. The sub-cylinder 2 is threadedly connected to the main cylinder 1 and presses the guide sleeve 15 at the bottom of the main cylinder 1. A clamping nut 16 is threadedly connected to the open end of the main cylinder 1. The clamping nut 16 presses the guide sleeve 15 at the open end of the main cylinder 1 into the main cylinder 1. The bottom of the sub-cylinder 2 is connected to a cylinder end connecting earring 20.

[0034] The piston 12 and the piston rod 13 are arranged in the main cylinder 1 for axial movement along the main cylinder 1. The piston 12 is coaxially connected to the piston rod 13. One end of the piston rod 13 passes through the guide sleeve 15 and the clamping nut 16 at the open end of the main cylinder 1 and is connected to the rod end connecting earring 14. The other end passes through the guide sleeve 15 at the bottom of the main cylinder 1 and extends into the auxiliary cylinder 2. The piston 12 divides the main cylinder 1 into a first cavity 10 and a second cavity 11.

[0035] The connecting pipe is arranged in a spiral shape, and the connecting pipe 4 is coaxially sleeved on the main cylinder 1. One end of the connecting pipe 4 is connected to the first cavity 10, and the other end is connected to the second cavity 11. Magnetorheological damping fluid is arranged in the first cavity 10 and the second cavity 11. When the piston 12 moves axially along the main cylinder 1, the magnetorheological damping fluid in the first cavity 10 flows toward the second cavity 11 through the connecting pipe 4, or the magnetorheological damping fluid in the second cavity 11 flows toward the first cavity 10 through the connecting pipe 4.

[0036] The outer sleeve 3 is sleeved on the auxiliary cylinder 2, and the open end of the outer sleeve 3 is arranged toward the main cylinder 1. The auxiliary cylinder 2 passes through the bottom of the outer sleeve 3. The bottom of the outer sleeve 3 is connected with a threaded tube 31. The inner wall of the threaded tube 31 is provided with a thread, and the outer wall of the auxiliary cylinder 2 is provided with a thread. The threaded tube 31 is threadedly connected with the auxiliary cylinder 2, so that by rotating the threaded tube 31, the outer sleeve 3 moves along the axial direction of the cylinder.

[0037] A mounting groove 30 is provided on the inner wall of the outer sleeve 3 near its open end. The mounting groove 30 is arranged in an annular shape. A permanent magnet 32 ​​and a fixing ring 33 are installed on the outer sleeve 3. The permanent magnet 32 ​​is arranged in an annular shape and is arranged in the mounting groove 30. The permanent magnet 32 ​​is fixed in the mounting groove 30 by the fixing ring 33. The inner wall of the outer sleeve 3 is spaced from the outer wall of the main cylinder 1. The inner diameters of the permanent magnet 32 ​​and the outer sleeve 3 are both larger than the outer diameter of the orthographic projection of the connecting pipe 4 in the plane where the diameter of the main cylinder 1 is located, so that the permanent magnet 32 ​​and the outer sleeve 3 can be sleeved on the outer side of the connecting pipe 4.

[0038] When the permanent magnet 32 ​​approaches the connecting tube 4, the viscosity of the magnetorheological damping fluid in the connecting tube 4 changes under the action of the magnetic field. The closer the permanent magnet 32 ​​is to the connecting tube 4, the greater the magnetic field strength it is subjected to. According to the characteristics of the magnetorheological damping fluid, its viscosity is proportional to the magnetic field strength. By changing the position of the annular permanent magnet 32 ​​on the outer sleeve, the size of the magnetic field on the connecting tube 4 can be adjusted to achieve the purpose of adjusting the damping performance of the damper.

[0039] The outer sleeve 3 moves along the axial direction of the main cylinder 1. In the process of the outer sleeve 3 moving from the auxiliary cylinder 2 toward the main cylinder 1:

[0040] In the plane where the axis of the main cylinder 1 is located, when the annular permanent magnet 32 ​​and the connecting pipe 4 do not overlap, the magnetorheological damping fluid flowing in the connecting pipe 4 is little affected by the magnetic field, and the viscosity of the magnetorheological damping fluid is the initial viscosity. At this time, the damping force of the damper is the smallest;

[0041] When the annular permanent magnet 32 ​​approaches the connecting tube 4, the magnetorheological damping fluid near the permanent magnet 32 ​​in the connecting tube 4 is affected by the magnetic field, and its viscosity will change. The closer the permanent magnet 32 ​​is to the connecting tube 4, the greater the influence of the magnetic field on the magnetorheological damping fluid, and the greater its viscosity. At this time, the damping force of the damper gradually increases. The magnetorheological damping fluid in the part of the connecting tube 4 opposite to the permanent magnet 32 ​​is most affected by the magnetic field, and its viscosity becomes the largest. At this time, the damping force of the damper is also the largest.

[0042] In summary, the present technical solution combines the structure of the spiral connecting tube 4 and the principle of liquid inertia damping, utilizes the flow characteristics of the liquid in the spiral connecting tube 4, increases the flow path of the magnetorheological damping fluid in the connecting tube 4, and utilizes the inertia and friction resistance generated by the flow of the magnetorheological damping fluid in the spiral connecting tube 4 to absorb and reduce vibrations. At the same time, the characteristics of the magnetorheological damping fluid are utilized to adjust the damping force by changing the size of the magnetic field on the flow channel.

[0043] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An adjustable inertia damper, characterized in that: include, Cylinder, and A piston (12), the piston (12) being movably arranged in the cylinder along the axial direction of the cylinder, the piston (12) being connected to a piston rod (13), and the piston (12) dividing the cylinder into a first cavity (10) and a second cavity (11); A connecting pipe (4), wherein two ends of the connecting pipe (4) are respectively connected to the first cavity (10) and the second cavity (11); Wherein, magnetorheological damping fluid is arranged in the first cavity (10) and the second cavity (11); An outer sleeve (3) is movably arranged outside the cylinder along the axial direction of the cylinder, and a permanent magnet (32) is connected to the outer sleeve. The permanent magnet (32) is used to adjust the magnetic field strength of the magnetorheological damping fluid.

2. The adjustable inertia damper according to claim 1, characterized in that: The connecting pipe (4) is arranged in a spiral shape.

3. The adjustable inertia damper according to claim 1, characterized in that: The cylinder is provided with threads, the outer sleeve (3) is provided with internal threads, the outer sleeve (3) is threadedly connected to the cylinder, and the permanent magnet (32) can be sleeved on the outside of the connecting pipe (4).

4. The adjustable inertia damper according to claim 3, characterized in that: The inner wall of the outer sleeve (3) is spaced from the outer wall of the cylinder, and a mounting groove (30) is provided on the inner wall of the outer sleeve (3). The mounting groove (30) passes through one end of the outer sleeve (3), and the permanent magnet (32) is arranged in the mounting groove (30).

5. The adjustable inertia damper according to claim 4, characterized in that: The inner diameter of the outer cylinder sleeve (3) is larger than the outer diameter of the connecting pipe (4) which is projected on the plane where the diameter of the main cylinder (1) is located.

6. The adjustable inertia damper according to claim 4, characterized in that: A fixing ring (33) is arranged in the installation groove (30), and the fixing ring (33) is used to fix the permanent magnet (32).

7. The adjustable inertia damper according to claim 1, characterized in that: The cylinder comprises a main cylinder (1) and a secondary cylinder (2); the piston (12) is movably arranged in the main cylinder (1); the first cavity (10) and the second cavity (11) are arranged in the main cylinder (1); the secondary cylinder (2) is coaxially connected to one end of the bottom of the main cylinder (1); one end of the piston rod (13) extends out of the open end of the main cylinder (1); the other end passes through the bottom of the main cylinder (1) and extends into the secondary cylinder (2); the outer sleeve (3) is threadedly connected to the secondary cylinder (2).

8. The adjustable inertia damper according to claim 7, characterized in that: The open end of the main cylinder (1) is connected to a guide sleeve (15), and the piston rod (13) passes through the guide sleeve (15) and is sealedly connected to the guide sleeve (15).

9. The adjustable inertia damper according to claim 8, characterized in that: The open end of the master cylinder (1) is provided with a clamping nut (16), the clamping nut (16) is located at the end of the guide sleeve (15) away from the bottom of the master cylinder (1), and the clamping nut (16) is used to fix the guide sleeve (15) in the master cylinder (1).

10. The adjustable inertia damper according to claim 7, characterized in that: The bottom of the main cylinder (1) is provided with a through opening, and the bottom of the main cylinder (1) is also provided with a guide sleeve (15), and the piston rod (13) passes through the guide sleeve (15) and is sealedly connected to the guide sleeve (15).

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