Adjustable magnetorheological fluid train shock absorber

Abstract

The utility model relates to an adjustable magnetorheological fluid train shock absorber, and belongs to the technical field of train shock absorbers. The adjustable magnetorheological fluid train shock absorber comprises a shell and a damping rod inserted into the shell. The pressurizing assembly is arranged in the shell and located on the surface of the damping rod; wherein the pressurizing assembly comprises a conical shell arranged on the inner wall of the shell, and an extrusion ring is arranged on the inner wall of the conical shell; by arranging a conical shell and an extrusion ring of the pressurization assembly, when the whole shock absorber is pressed, the extrusion ring extrudes the deep position of the conical shell, the pressure is gradually increased, the effect of self-adaptive pressure adjustment is achieved, and the damping effect and the shock absorption strength of the shock absorber can be effectively improved; through the design of the buffer ring and the deformation holes, a certain deformable space can be provided for the extrusion ring, the compression resistance degree of the extrusion ring is improved, and the problem that the extrusion ring is deformed or the durability is reduced due to long-term compression is reduced.

Description

Technical Field

[0001] This utility model relates to the field of train vibration damper technology, and in particular to an adjustable magnetorheological fluid train vibration damper. Background Technology

[0002] Trains are vehicles pulled by powered cars and travel along fixed tracks. They are categorized into high-speed rail, subway, and conventional trains. They offer advantages such as large carrying capacity, high speed, energy efficiency, and environmental friendliness, making them a core component of modern transportation. Trains rely on a wheel-rail system for operation, but vibrations occur during travel due to track irregularities, wheel-rail impacts, and acceleration / deceleration, affecting comfort and safety. Therefore, vibration dampers are needed to counteract these vibrations.

[0003] For example, referring to the case "A Magnetorheological Fluid Damper for Vibration Reduction in Train Cars" (Announcement No. CN222415759U), this utility model relates to the technical field of magnetorheological fluid dampers, specifically a magnetorheological fluid damper for vibration reduction in train cars. It includes a connecting plate one and a connecting plate two. One side of each connecting plate has a boss, and the other side of the boss has a groove. A fixing rod is located on the side of the groove. A connecting base is located outside the fixing rod. A damper body is located between the connecting bases. The damper body includes a cylinder structure and a damping rod structure. The cylinder structure includes a rotating plate one, with a cylinder barrel on one side. One end of the cylinder barrel has a bellows pipe, and one side of the cylinder barrel has an annular groove. A hollow area is located inside the cylinder barrel's sidewall, and a coil is located within the hollow area. The damping rod structure includes a thin rod body, with a sliding plate at one end, an annular insert plate on one side of the rotating plate, and a thick rod body at the other end. A rotating plate two is located on one side of the thick rod body. This invention solves the problem that the existing hydraulic damper structure used for anti-snake vibration reduction in train carriages occupies a large space and has poor space utilization.

[0004] Although the aforementioned damper can achieve a damping effect by using an annular groove in conjunction with an annular insert plate, the specifications of the annular groove and the annular insert plate are relatively fixed. Therefore, the friction force generated during each compression is constant, resulting in a relatively fixed damping force each time. Consequently, it cannot adaptively adjust according to different impact forces. Utility Model Content

[0005] Therefore, it is necessary to provide an adjustable magnetorheological fluid train vibration damper to address the problem that the damping effect of the aforementioned vibration dampers is relatively fixed and cannot be adaptively adjusted according to different impact forces, thus having certain limitations.

[0006] An adjustable magnetorheological fluid train damper includes: a housing and a damping rod inserted therein;

[0007] A pressurization assembly, wherein the pressurization assembly is disposed inside the housing and located on the surface of the damping rod;

[0008] The pressurization component includes a conical shell disposed on the inner wall of the housing, and the inner wall of the conical shell is provided with an extrusion ring.

[0009] In one embodiment, the pressurization assembly further includes a retaining ring disposed on the surface of the damping rod, the surface of the retaining ring being provided with a buffer ring, and the outer surface of the buffer ring being fixedly connected to the inner wall of the extrusion ring.

[0010] In one embodiment, one edge of the extrusion ring is chamfered, and the chamfered portion of the extrusion ring is adapted to the taper of the inner wall of the conical shell.

[0011] In one embodiment, the buffer ring has a deformation hole inside, and the deformation hole is annular.

[0012] In one embodiment, the inner wall of the compression ring is provided with a slot, and a plug is inserted into the slot. The side of the plug near the damping rod is fixedly connected to the damping rod.

[0013] In one embodiment, the inserts and slots are arranged in a ring array around the damping rod as the axis.

[0014] In one embodiment, a protective shell is disposed inside the housing, and a coil is disposed inside the protective shell.

[0015] Beneficial effects

[0016] 1. By setting the conical shell and extrusion ring of the pressure boosting component, when the shock absorber is under pressure, the extrusion ring can be squeezed into the depth of the conical shell and the pressure can be gradually increased to achieve the effect of adaptive pressure adjustment, which can effectively improve the damping effect and vibration reduction force of the shock absorber.

[0017] 2. By setting a buffer ring and a deformation hole, a certain amount of deformation space can be provided for the extrusion ring, which can improve the compressive strength of the extrusion ring and reduce the problem of deformation or reduced durability caused by long-term pressure on the extrusion ring. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the shell of this utility model;

[0021] Figure 3 This is a schematic diagram showing the disassembled structure of the damping rod and the pressurization assembly of this utility model;

[0022] Figure 4 This is a schematic diagram showing the disassembled structure of the extrusion ring and buffer ring of this utility model.

[0023] Figure 5 This is a top view of the extrusion ring of this utility model.

[0024] Figure label:

[0025] 1. Housing; 2. Damping rod; 3. Coil; 4. Pressure boosting assembly; 401. Conical shell; 402. Deformation hole; 403. Fixing ring; 404. Buffer ring; 405. Extrusion ring; 406. Insert block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] The following is combined Figures 1-5 This invention describes an adjustable magnetorheological fluid train vibration damper.

[0032] In one embodiment, an adjustable magnetorheological fluid train damper includes: a housing 1 and a damping rod 2 inserted therein;

[0033] The pressurization component 4 is disposed inside the housing 1 and located on the surface of the damping rod 2;

[0034] like Figure 2 and Figure 3 As shown, the booster assembly 4 includes a conical shell 401 disposed on the inner wall of the housing 1, and an extrusion ring 405 disposed on the inner wall of the conical shell 401; one side edge of the extrusion ring 405 is chamfered, and the chamfered part of the extrusion ring 405 is adapted to the taper of the inner wall of the conical shell 401.

[0035] If the carriage is subjected to vibration, the damping rod 2 and the housing 1 will move closer to each other. At this time, the compression ring 405 will move closer to the conical shell 401 and contact the inner wall of the conical shell 401. As the housing 1 and the damping rod 2 continue to move closer, the compression ring 405 will continue to press deeper into the conical shell 401. At the same time, the friction and pressure between the conical shell 401 and the compression ring 405 will gradually increase, thereby achieving the effect of adaptively adjusting the damping pressure according to different vibration conditions.

[0036] It should be noted that: such as Figure 5As shown, the extrusion ring 405 is composed of multiple segments, and a rubber compensation connecting segment is provided between each two segments. Through multiple compensation connecting segments, not only can the pressure uniformity of the extrusion ring 405 be guaranteed, but also the deformation compensation of multiple segments can be performed when the extrusion ring 405 penetrates into the conical shell 401, thereby improving the overall strength of the extrusion ring 405.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, the pressurization assembly 4 also includes a fixing ring 403 disposed on the surface of the damping rod 2. A buffer ring 404 is disposed on the surface of the fixing ring 403. The outer surface of the buffer ring 404 is fixedly connected to the inner wall of the extrusion ring 405. A deformation hole 402 is opened inside the buffer ring 404. The deformation hole 402 is opened in a circular shape.

[0038] When the extrusion ring 405 is pressed into the conical shell 401, the extrusion ring 405 will apply downward pressure along the tapered inner wall of the conical shell 401. At this time, the buffer ring 404 will be pressed downward by the extrusion ring 405. The deformation hole 402 can support the buffer ring 404 and distribute the pressure, increase the pressure on the extrusion ring 405, and also increase the damping force, thus reducing vibration to a certain extent.

[0039] When the extrusion ring 405 is extruded by the conical shell 401, multiple segments of the extrusion ring 405 will simultaneously displace in the direction of the damping rod 2. At this time, the slot will move along the insertion rod in a specified path, which can improve the deformation consistency of multiple segments of the extrusion ring 405 and also evenly distribute the pressure of the extrusion ring 405.

[0040] The inner wall of the compression ring 405 has a slot, and a plug 406 is inserted into the slot. The side of the plug 406 near the damping rod 2 is fixedly connected to the damping rod 2.

[0041] Multiple inserts 406 and slots are arranged in a circular array around the damping rod 2; a protective shell is installed inside the housing 1, and a coil 3 is installed inside the protective shell;

[0042] The principle by which coil 3 changes the viscosity of magnetorheological fluid (MRF) after being energized is as follows: MRF is composed of magnetic microparticles, a carrier fluid, and a stabilizer. When there is no magnetic field, the microparticles are randomly distributed, and the fluid exhibits Newtonian fluid characteristics. When a magnetic field is applied, the microparticles are magnetized and arranged into a chain-like structure along the magnetic field lines, hindering fluid flow and exhibiting high viscosity or even a near-solid state. When current passes through coil 3 wound on the piston of the damper, an axial magnetic field is generated according to Ampere's law. The magnetic field penetrates the MRF, causing the suspended magnetic microparticles to be magnetized instantaneously. The magnetized microparticles are acted upon by the magnetic field force and arrange into a fibrous chain-like structure along the direction of the magnetic field lines, increasing the internal shear resistance of the fluid. The strength of the chain-like structure increases with the increase of the magnetic field, resulting in a significant increase in the apparent viscosity of the fluid. By adjusting the current of coil 3, the magnetic field strength can be precisely controlled, thereby continuously and steplessly adjusting the viscosity of MRF and the damping force of the damper. After the power is turned off, the magnetic field disappears, the microparticle chain structure disintegrates, and the fluid returns to a low viscosity state.

[0043] Working principle: When the carriage is subjected to vibration, the damping rod 2 and the housing 1 will move closer to each other. Magnetorheological fluid is installed inside the housing 1. When the coil 3 is energized, by adjusting the power, the magnetorheological fluid inside the housing 1 and between the housing 1 and the damping rod 2 will have different viscosities, thus cooperating with the damping rod 2 to provide initial buffering. At the same time, when the damping rod 2 and the housing 1 are relatively close, the outer diameter of the compression ring 405 will first contact the inner wall of the conical shell 401. As the housing 1 and the damping rod 2 continue to move closer, the compression ring 405 will continue to be squeezed deeper into the conical shell 401. At the same time, the friction and pressure between the conical shell 401 and the compression ring 405 will gradually increase, thus achieving the effect of adaptively adjusting the damping pressure according to different vibration conditions.

[0044] It should be noted that the coils 3 mentioned above are all devices with relatively mature existing technology. The specific model can be selected according to actual needs. In addition, the power supply of coil 3 is a built-in power supply, which will not be described in detail here.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An adjustable magnetorheological fluid train vibration damper, characterized in that, include: The housing (1) and the damping rod (2) inserted inside it; A booster assembly (4) is disposed inside the housing (1) and located on the surface of the damping rod (2); The pressurization component (4) includes a conical shell (401) disposed on the inner wall of the housing (1), and the inner wall of the conical shell (401) is provided with an extrusion ring (405).

2. The adjustable magnetorheological fluid train vibration damper according to claim 1, characterized in that, The booster assembly (4) also includes a fixing ring (403) disposed on the surface of the damping rod (2), and a buffer ring (404) is disposed on the surface of the fixing ring (403), and the outer surface of the buffer ring (404) is fixedly connected to the inner wall of the compression ring (405).

3. The adjustable magnetorheological fluid train vibration damper according to claim 1, characterized in that, The extrusion ring (405) has a chamfered edge on one side, and the chamfered part of the extrusion ring (405) is adapted to the taper of the inner wall of the conical shell (401).

4. The adjustable magnetorheological fluid train vibration damper according to claim 2, characterized in that, The buffer ring (404) has a deformation hole (402) inside, and the deformation hole (402) is opened in a ring shape.

5. The adjustable magnetorheological fluid train vibration damper according to claim 1, characterized in that, The inner wall of the compression ring (405) is provided with a slot, and a plug (406) is inserted into the slot. The plug (406) is fixedly connected to the damping rod (2) on the side near the damping rod (2).

6. The adjustable magnetorheological fluid train vibration damper according to claim 5, characterized in that, The insert (406) and slot are arranged in a ring array with the damping rod (2) as the axis.

7. The adjustable magnetorheological fluid train vibration damper according to claim 1, characterized in that, The housing (1) is provided with a protective shell inside, and the protective shell is provided with a coil (3) inside.

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