Double-vortex-shaped micro-vibration applicable magnetorheological damper

Abstract

A double-vortex-shaped micro-vibration applicable magnetorheological damper belongs to the technical field of dampers, and comprises a shell, a sealing disc and an end cover which are fixedly connected to form a closed cavity, and the cavity is filled with magnetorheological fluid; the outer piston rod, the double-vortex-shaped flow channel disc and the inner piston rod are fixedly connected. A damping channel is formed by an outer piston rod drainage hole, a vortex-shaped flow channel of the double-vortex-shaped flow channel disc and an inner piston rod drainage hole. The coil is wound on the outer side of the double-vortex-shaped runner disc, the lantern ring is fixedly connected with the outer piston rod and the inner piston rod to form a piston assembly, the piston assembly divides a cavity into an upper cavity and a lower cavity, and the outer side of the lantern ring is in clearance fit with the inner side of the shell; the shell and the outer piston rod are in clearance fit and achieve sliding sealing through the sealing ring, and the sealing disc and the inner piston rod are in clearance fit and achieve sliding sealing through the sealing ring. The magneto-rheological damper is provided with an ultra-long damping channel, displacement loss caused by magneto-rheological fluid compression or installation gaps can be effectively compensated, and the magneto-rheological damper is suitable for centimeter-level even micron-level micro-vibration suppression.

Description

Technical Field

[0001] The invention relates to a double-vortex micro-vibration applicable magnetorheological damper, belonging to the technical field of dampers. Background Art

[0002] Magnetorheological dampers, developed based on the magnetorheological effect, can provide controllable damping force and have the characteristics of simple structure, fast response and low power consumption. They are widely used in vibration control in fields such as vehicles, buildings and bridges. As an ideal semi-active actuating device, magnetorheological dampers also have broad application prospects in vibration control in the aerospace field. However, the effective stroke of existing magnetorheological dampers is at the centimeter level, mainly because the damping channel of existing magnetorheological dampers is relatively short and the working medium of magnetorheological dampers, magnetorheological fluid, has a certain degree of compressibility. The centimeter-level effective stroke greatly limits the application scope of magnetorheological dampers, and it is difficult to exert their performance for micro-vibrations at the millimeter level or even the micron level.

[0003] In the prior art, the damping channel of the magnetorheological damper is relatively short, which makes it difficult to compensate for the compression effect of the magnetorheological fluid under micro-vibration conditions. Therefore, it is difficult to be applied to micro-vibration suppression. Summary of the Invention

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a double-vortex micro-vibration applicable magnetorheological damper, to expand the micro-vibration applicability of the magnetorheological damper, and to broaden the application range of the magnetorheological damper.

[0005] The technical solution of the present invention is: a double-vortex micro-vibration applicable magnetorheological damper, comprising a housing, a double-vortex flow channel disk, a coil, a sealing disk, an end cover, an outer piston rod, a collar and an inner piston rod;

[0006] The end cap is mounted on the base, and the end of the outer piston rod is connected to the external load;

[0007] The housing, the sealing disk and the end cover are axially fixedly connected in sequence to form a closed chamber, and the chamber is filled with magnetorheological fluid;

[0008] The chassis of the outer piston rod, the double-vortex flow channel disk and the chassis of the inner piston rod are axially fixedly connected in sequence; the coil is wound around the outer side of the double-vortex flow channel disk, and the collar is fixedly connected to the chassis of the outer piston rod and the chassis of the inner piston rod respectively to form a piston assembly; the piston assembly divides the chamber into an upper chamber and a lower chamber, and the outer side of the collar and the inner side of the outer shell are clearance-fitted; the center hole of the outer shell and the end of the outer piston rod are clearance-fitted, and a sliding seal is achieved by a sealing ring; the center hole of the sealing disk and the end of the inner piston rod are clearance-fitted, and a sliding seal is achieved by a sealing ring; the drainage holes on the chassis of the outer piston rod, the vortex flow channels of the double-vortex flow channel disk and the drainage holes on the chassis of the inner piston rod constitute a damping channel.

[0009] Furthermore, vortex flow channels are engraved on both sides of the double-vortex flow channel disk, and the shapes and radial positions of the flow channels on both sides are consistent and are connected through a hole at the center.

[0010] Furthermore, the shape and radial position of the flow channels on both sides of the double-vortex flow channel disk are adjusted to adjust the damping force output by the damper.

[0011] Furthermore, the center line of the drainage hole on the chassis of the outer piston rod is collinear with the center line of the drainage hole on the chassis of the inner piston rod, and is aligned with the outer starting point of the vortex flow channel of the double-vortex flow channel disk.

[0012] Furthermore, the shell, sealing disc and end cover are made of non-magnetic materials, and the double-vortex flow channel disc, outer piston rod, collar and inner piston rod are made of magnetic materials.

[0013] Furthermore, when the coil is energized, a magnetic field is formed, which passes vertically through the vortex flow channel of the double vortex flow channel disk, and the magnetic field is annularly distributed in the double vortex flow channel disk, the outer piston rod, the collar and the inner piston rod.

[0014] Furthermore, when the piston assembly and the outer shell slide relative to each other, the magnetic fluid in the upper chamber flows into the periphery of the vortex flow channel of the double vortex flow channel disk through the drainage holes on the chassis of the outer piston rod, and gradually flows along the vortex flow channel to the center of the double vortex flow channel disk, and then flows to the other side through the small holes near the center of the double vortex flow channel disk, and continues to flow along the vortex flow channel gradually to the periphery of the double vortex flow channel disk, and finally flows into the lower chamber through the drainage holes on the chassis of the inner piston rod.

[0015] Furthermore, when the piston assembly and the housing slide relative to each other, the magnetorheological fluid in the flow channel of the double-vortex flow channel disk and the magnetic field formed by the energized coil produce a shearing effect, thereby outputting a damping force.

[0016] Furthermore, the energization level of the coil is adjusted to regulate the damping force output by the damper.

[0017] Furthermore, according to the mass of the load and the change of the motion state, the damping force of the damper is regulated to adjust the vibration reduction and isolation.

[0018] The advantages of the present invention compared with the prior art are:

[0019] (1) The magnetorheological damper of the present invention has an ultra-long damping channel, which can effectively compensate for the displacement loss caused by magnetorheological fluid compression or installation gap, and is suitable for centimeter-level or even micron-level micro-vibration suppression.

[0020] (2) The magnetorheological damper of the present invention adopts a vortex damping channel and integrates the damping channel into a thinner disc, which greatly reduces the installation height of the magnetorheological damper.

[0021] (3) The magnetorheological damper of the present invention adopts a vortex damping channel, which increases the effective area of ​​the damping channel and greatly improves the maximum controllable damping output of the magnetorheological damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0023] Figure 1 Schematic diagram of the magnetorheological damper of the present invention;

[0024] Figure 2 is a cross-sectional view of the magnetorheological damper of the present invention;

[0025] Figure 3 This is a schematic diagram of the double-vortex flow channel disk of the present invention;

[0026] Figure 4 This is a cross-sectional view of the double-vortex flow channel disk of the present invention. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0028] The following is a further detailed description of a double-vortex micro-vibration-suitable magnetorheological damper provided by an embodiment of the present invention in conjunction with the accompanying drawings. The specific implementation method may include: a housing 1, a double-vortex flow channel disk 2, a coil 3, a sealing disk 4, an end cover 5, an outer piston rod 6, a collar 7 and an inner piston rod 8;

[0029] The end cap 5 is mounted on the base, and the end of the outer piston rod 6 is connected to the external load;

[0030] The housing 1, the sealing disk 4 and the end cover 5 are axially fixedly connected in sequence to form a closed chamber, and the chamber is filled with magnetorheological fluid;

[0031] The chassis of the outer piston rod 6, the double-vortex flow channel disk 2 and the chassis of the inner piston rod 8 are axially fixedly connected in sequence; the coil 3 is wound around the outer side of the double-vortex flow channel disk 2, and the collar 7 is fixedly connected to the chassis of the outer piston rod 6 and the chassis of the inner piston rod 8 respectively to form a piston assembly; the piston assembly divides the chamber into an upper chamber and a lower chamber, and the outer side of the collar 7 and the inner side of the outer shell 1 are clearance fit; the center hole of the outer shell 1 and the end of the outer piston rod 6 are clearance fit, and a sliding seal is achieved by a sealing ring; the center hole of the sealing disk 4 and the end of the inner piston rod 8 are clearance fit, and a sliding seal is achieved by a sealing ring; the drainage holes on the chassis of the outer piston rod 6, the vortex flow channels of the double-vortex flow channel disk 2 and the drainage holes on the chassis of the inner piston rod 8 constitute a damping channel.

[0032] In the solution provided in the embodiment of the present invention, Figure 1 、 2 As shown, the double-vortex micro-vibration applicable magnetorheological damper of the present invention includes a shell 1, a double-vortex flow channel disk 2, a coil 3, a sealing disk 4, an end cover 5, an outer piston rod 6, a collar 7 and an inner piston rod 8; the shell 1, the sealing disk 4 and the end cover 5 are fixed together by screws to form a closed chamber, and the chamber is filled with magnetorheological fluid; the outer piston rod 6, the double-vortex flow channel disk 2 and the inner piston rod 8 are fixed together, and the drainage holes on the outer piston rod 6, the vortex flow channels of the double-vortex flow channel disk 2 and the drainage holes on the inner piston rod 8 constitute a damping channel; the coil 3 is wound around the outer side of the double-vortex flow channel disk 2, and the collar 7 is screwed and fixed to the outer piston rod 6 and the inner piston rod 8 to form a piston assembly, which divides the chamber into an upper chamber and a lower chamber, and the outer side of the collar 7 is clearance-fitted with the inner side of the shell 1; the shell 1 and the outer piston rod 6 are clearance-fitted, and a sliding seal is achieved by a sealing ring, and the sealing disk 4 and the inner piston rod 8 are clearance-fitted, and a sliding seal is achieved by a sealing ring.

[0033] like Figure 3 and Figure 4 As shown, the double vortex flow channel disc 2 is engraved with vortex flow channels on both sides, and the shapes and radial positions of the flow channels on both sides are consistent and connected through a small hole near the center. Figure 1 and Figure 2As shown, when the piston assembly and the housing 1 slide relative to each other, the magnetic fluid in the upper chamber flows into the periphery of the vortex flow channel of the double vortex flow channel disk 2 through the drainage hole on the outer piston rod 6, and gradually flows along the vortex flow channel to the center of the double vortex flow channel disk 2, and then flows to the other side through the small hole near the center of the double vortex flow disk 2, continues to flow along the vortex flow channel gradually to the periphery of the double vortex flow channel disk 2, and finally flows into the lower chamber through the drainage hole on the inner piston rod 8.

[0034] During operation, the dual-vortex micro-vibration-suitable magnetorheological damper is installed on the base through the end cover 5, and the outer piston rod 6 is connected to the load. The vibration of the base drives the piston assembly to slide relative to the outer shell 1, and the magnetorheological fluid in the upper chamber and the lower chamber exchange and flow through the damping channel, generating a damping force, changing the current in the coil, and the damping force changes accordingly. According to the mass of the load and the changes in the motion state, the damping force of the damper is regulated to adjust the vibration reduction and isolation. The dual-vortex micro-vibration-suitable magnetorheological damper has an ultra-long damping channel, which effectively compensates for the displacement loss caused by the compression of the magnetorheological fluid or the installation gap, and is suitable for centimeter-level or even micron-level micro-vibration suppression.

[0035] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

[0036] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A double-vortex micro-vibration applicable magnetorheological damper, characterized in that: It comprises a housing (1), a double-vortex flow channel disk (2), a coil (3), a sealing disk (4), an end cover (5), an outer piston rod (6), a collar (7) and an inner piston rod (8); The end cover (5) is mounted on the base, and the end of the outer piston rod (6) is connected to the external load; The housing (1), the sealing disk (4) and the end cover (5) are axially fixedly connected in sequence to form a closed chamber, and the chamber is filled with magnetorheological fluid; The chassis of the outer piston rod (6), the double vortex flow channel disk (2) and the chassis of the inner piston rod (8) are axially fixedly connected in sequence; the coil (3) is wound around the outer side of the double vortex flow channel disk (2), and the collar (7) is fixedly connected to the chassis of the outer piston rod (6) and the chassis of the inner piston rod (8) respectively to form a piston assembly; the piston assembly divides the chamber into an upper chamber and a lower chamber, and the outer side of the collar (7) and the inner side of the outer shell (1) are clearance-matched; the center hole of the outer shell (1) and the end of the outer piston rod (6) are clearance-matched, and a sliding seal is achieved through a sealing ring; the center hole of the sealing disk (4) and the end of the inner piston rod (8) are clearance-matched, and a sliding seal is achieved through a sealing ring; the drainage hole on the chassis of the outer piston rod (6), the vortex flow channel of the double vortex flow channel disk (2) and the drainage hole on the chassis of the inner piston rod (8) form a damping channel.

2. A double-vortex micro-vibration applicable magnetorheological damper according to claim 1, characterized in that: The double-vortex flow channel disk (2) has vortex flow channels engraved on both sides, the shapes and radial positions of the flow channels on both sides are consistent, and are connected through a hole at the center.

3. The double-vortex micro-vibration applicable magnetorheological damper according to claim 2, characterized in that: The shapes and radial positions of the flow channels on both sides of the double-vortex flow channel disk (2) are adjusted to adjust the damping force output by the damper.

4. The double-vortex micro-vibration applicable magnetorheological damper according to claim 2, characterized in that: The center line of the drainage hole on the chassis of the outer piston rod (6) is colinear with the center line of the drainage hole on the chassis of the inner piston rod (8), and is aligned with the outer starting point of the vortex flow channel of the double vortex flow channel plate (2).

5. The double-vortex micro-vibration applicable magnetorheological damper according to claim 1, characterized in that: The shell (1), sealing disk (4) and end cover (5) are made of non-magnetic materials, and the double-vortex flow channel disk (2), outer piston rod (6), collar (7) and inner piston rod (8) are made of magnetic materials.

6. The double-vortex micro-vibration applicable magnetorheological damper according to claim 1, characterized in that: When the coil (3) is energized, a magnetic field is formed, which passes vertically through the vortex flow channel of the double vortex flow channel disk (2), and the magnetic field is distributed in the double vortex flow channel disk (2), the outer piston rod (6), the collar (7) and the inner piston rod (8) in an annular shape.

7. The double-vortex micro-vibration applicable magnetorheological damper according to claim 1, characterized in that: When the piston assembly and the housing (1) slide relative to each other, the magnetic fluid in the upper chamber flows into the periphery of the vortex flow path of the double vortex flow path disk (2) through the drainage holes on the bottom plate of the outer piston rod (6), and gradually flows along the vortex flow path to the center of the double vortex flow path disk (2), then flows to the other side through the small holes near the center of the double vortex flow path disk (2), continues to gradually flow along the vortex flow path to the periphery of the double vortex flow path disk (2), and finally flows into the lower chamber through the drainage holes on the bottom plate of the inner piston rod (8).

8. The double-vortex micro-vibration applicable magnetorheological damper according to claim 1, characterized in that: When the piston assembly and the housing (1) slide relative to each other, the magnetorheological fluid in the flow channel of the double-vortex flow channel disk (2) and the magnetic field formed by the energized coil (3) produce a shearing effect, thereby outputting a damping force.

9. The double-vortex micro-vibration applicable magnetorheological damper according to claim 8, characterized in that: The magnitude of the current supplied to the coil (3) is adjusted to regulate the damping force output by the damper.

10. The double-vortex micro-vibration applicable magnetorheological damper according to claim 1, characterized in that: According to the mass of the load and the changes in the motion state, the damping force of the damper is adjusted to adjust the vibration reduction and isolation.

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