CN112594320B - Inertial volume and magnetorheological damping fusion type suspension vibration damping mechanism - Google Patents
Inertial volume and magnetorheological damping fusion type suspension vibration damping mechanism Download PDFInfo
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- CN112594320B CN112594320B CN202011389819.3A CN202011389819A CN112594320B CN 112594320 B CN112594320 B CN 112594320B CN 202011389819 A CN202011389819 A CN 202011389819A CN 112594320 B CN112594320 B CN 112594320B
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- piston
- cylinder barrel
- damping
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- magnetorheological
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
- F16F9/537—Magnetorheological [MR] fluid dampers specially adapted valves therefor
Abstract
The invention provides an inertial volume and magnetorheological damping fusion type suspension damping mechanism, which belongs to the field of damping systems and comprises a cylinder barrel and a piston, wherein an excitation coil is surrounded on the outer wall of the cylinder barrel, a closed inner cavity is arranged in the cylinder barrel, and magnetorheological liquid is filled in the inner cavity; the piston is connected in the inner cavity in a sliding manner, and is provided with a spiral pipeline which is communicated with two ends of the piston; the end part of one end of the piston is fixedly connected with a plug rod, the plug rod extends to the outside of the cylinder barrel, and the plug rod is in sliding sealing fit with the end part of the cylinder barrel. The invention provides a vibration reduction mechanism integrating an inertial container and a damper, and the vibration reduction mechanism has inertial container and damping functions, so that the number of components required to be used in a vibration reduction system is reduced, and the vibration reduction mechanism is miniaturized and lightened; and the damping adjustment can be realized by controlling the current in the magnet exciting coil, so that the damping adjustment can be flexibly adjusted in the driving process of the vehicle to adapt to different road conditions or vehicle conditions and provide hardware support.
Description
Technical Field
The invention belongs to the field of vibration reduction systems, and particularly relates to an inertial container and a magnetorheological damping suspension vibration reduction mechanism.
Background
The damping system is widely applied to vehicles such as automobiles, motorcycles and the like, and is an important part for ensuring the stability of a carried object. The traditional vibration reduction system is composed of a spring and damping, and in the use process of the vibration reduction system, each attribute parameter is single and unadjustable, and vibration can only be passively responded, so that the vibration reduction effect is limited, and the application range is narrow.
In view of the above-mentioned drawbacks, a damping system consisting of a combination of an inerter, a damper and a spring is proposed; in such damping systems, the spring acts as a stiffness term to dampen the vibration; the damper is used as an energy consumption item and is used for consuming elastic energy generated after the spring absorbs the vibration; the inertia container is a special element with two end points of relative acceleration in direct proportion to the force borne by the inertia container, can simulate larger virtual mass by using smaller self mass, has smaller size and self mass compared with the traditional mass element, can break through the limitation of the traditional spring and damping vibration attenuation structure on the vibration attenuation performance by applying the inertia container to the vibration attenuation mechanism, adjusts the inherent characteristic of the vibration attenuation mechanism, and further optimizes the vibration attenuation performance.
In the vibration damping system consisting of the inertial container, the damper and the spring in the prior art, three devices are independent and then connected together in series or in parallel, so that the whole structure is large in size and heavy in weight and is not beneficial to installation and use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the inertial container and magnetorheological damping fusion type suspension damping mechanism, the inertial container and the damper are fused into an integrated structure, and the overall volume and weight of the damping mechanism are effectively reduced.
The present invention achieves the above technical objects by the following technical means.
An inertial volume and magnetorheological damping fusion type suspension damping mechanism comprises a cylinder barrel and a piston, wherein an excitation coil surrounds the outer wall of the cylinder barrel, a closed inner cavity is arranged in the cylinder barrel, and magnetorheological liquid is filled in the inner cavity; the piston is connected in the inner cavity in a sliding manner, a spiral pipeline is arranged in the piston, and the spiral pipeline is communicated with two ends of the piston; the end part of one end of the piston is fixedly connected with a plug rod, the plug rod extends to the outside of the cylinder barrel, and the plug rod is in sliding sealing fit with the end part of the cylinder barrel.
Furthermore, the spiral pipeline is of a double-spiral structure formed by two spiral pipes, a one-way valve is arranged in each spiral pipe, and the circulation directions of the two spiral pipes are opposite.
Further, the piston comprises a piston outer shell and a piston core rod, and the spiral pipeline is wound between the piston outer shell and the piston core rod.
Further, the spiral pipeline is in sealing fit with the piston outer shell and the piston core rod.
Further, both ends of the spiral pipeline extend out of the end part of the piston.
Further, the plug rod is coaxial with the piston.
Further, the cylinder barrel is of a cylindrical structure.
Further, the diameter of the plug rod is smaller than that of the inner cavity.
The invention has the beneficial effects that:
(1) the invention provides a vibration reduction mechanism integrating an inertial container and a damper, which has the functions of inertial container and damping, thereby reducing the number of components required to be used in a vibration reduction system and enabling the vibration reduction mechanism to be miniaturized and lightened.
(2) In the vibration damping mechanism, only the joint of the piston rod and the end of the cylinder barrel needs to be subjected to sliding sealing treatment in the measure of preventing liquid in the cavity from leaking, and compared with other conventional vibration damping mechanisms with similar functions, the vibration damping mechanism has fewer movable sealing points, so that the difficulty of the leakage-preventing measure is small, and the sealing performance of the whole device is high.
(3) In the vibration damping mechanism, the active adjustment of the damping can be realized by controlling the current in the excitation coil, and the vibration damping mechanism provides hardware support for flexibly adjusting the damping in the driving process of a vehicle so as to adapt to different road conditions or vehicle conditions.
(4) The spiral pipeline adopts double spiral pipes with opposite flowing directions, so that the internal impact of liquid caused by the reversing of a piston in a cylinder barrel during vibration is avoided, and the stability of the device is improved.
(5) According to the invention, the spiral pipeline is arranged in the piston in a manner of wrapping and clamping the piston shell and the piston core rod, so that the protection of the spiral pipeline is formed, and the failure problem caused by direct friction between the spiral pipeline and the inner wall of the cylinder barrel due to the fact that the spiral pipeline is directly sleeved on the outer layer of the piston is avoided.
Drawings
FIG. 1 is a structural diagram of an inertial volume and magnetorheological damping fusion type suspension damping mechanism of the invention;
FIG. 2 is a block diagram of the spiral pipe of the present invention;
FIG. 3 is a block diagram of the piston of the present invention;
FIG. 4 is an exemplary illustration of a state of use of the damping mechanism of the present invention;
reference numerals: 1. the piston rod type magnetorheological fluid damper comprises a cylinder barrel, 2 magnet exciting coils, 3 pistons, 31 piston shells, 32 gaps, 33 piston core rods, 4 plug rods, 5 magnetorheological fluid, 6 spiral pipelines, 61 first spiral pipes and 62 second spiral pipes.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The inertial volume and magnetorheological damping fusion type suspension damping mechanism shown in fig. 1 comprises a cylinder barrel 1, a piston 3 and a plug rod 4; the cylinder barrel 1 is of a hollow cylindrical structure, the excitation coil 2 surrounds the middle part of the cylinder barrel 1 along the outer circumferential direction, the inner cavity of the cylinder barrel 1 is of a closed structure, and magnetorheological liquid 5 is filled in the inner cavity; the piston 3 is connected in the inner cavity of the cylinder body 1 in a sliding manner, the outer wall of the piston 3 is in sealing fit with the inner wall of the cylinder barrel 1, a spiral pipeline 6 is arranged inside the piston 3, and the spiral pipeline 6 is communicated with two ends of the piston 3; the stopper rod 4 links firmly in 3 one ends of piston, stopper rod 4 and 3 coaxial lines of piston, and stopper rod 4 diameter is less than the inner chamber diameter, and stopper rod 4 extends to 1 outsidely of cylinder by 1 inner chamber of cylinder to the stopper rod 4 is sliding seal cooperation with 1 tip contact position of cylinder.
The spiral duct 6 shown in fig. 2 includes a first spiral pipe 61 and a second spiral pipe 62, a double-spiral structure is formed between the first spiral pipe 61 and the second spiral pipe 62, a check valve is disposed inside each of the first spiral pipe 61 and the second spiral pipe 62, and the direction of the check valve inside each of the first spiral pipe 61 and the second spiral pipe 62 is opposite, for example, the direction of the fluid flow of the first spiral pipe 61 is from top to bottom, and the direction of the fluid flow of the second spiral pipe 62 is from bottom to top.
The piston 3 shown in fig. 3 is a cylindrical structure, and includes a piston housing 31 and a piston core rod 33, and a gap 32 for accommodating the spiral pipe 6 is left between the piston housing 31 and the piston core rod 33; when the spiral pipeline 6 is assembled in the gap 32, the liquid inlets or the liquid outlets at two ends of the spiral pipeline 6 respectively extend out from the end faces at two ends of the piston 3, and the spiral pipeline 6 is in sealing fit with the piston shell 31 and the piston core rod 33.
The use states of the present invention are exemplified as follows:
as shown in fig. 4, the usage state example of the inertial volume and magnetorheological damping fusion type suspension damping mechanism of the invention is connected with a spring in a parallel connection manner, i.e. the end of a plug rod 4 is connected with one end of the spring through a connecting rod, and the end of a cylinder barrel 1 far away from the plug rod 4 is connected with the other end of the spring through a connecting rod, so that one end of the parallel connection type damping system formed by the parallel connection type damping mechanism is connected with a sprung mass, i.e. connected with a frame, a carriage and other components, and the other end is connected with an unsprung mass, i.e. connected with wheels and other components.
In the parallel type vibration damping system, the spring plays a role in rigidity, and when the spring is subjected to vibration impact transmitted from a road surface, the spring is compressed or stretched to deform, and meanwhile, the piston 3 in the vibration damping mechanism also slides up and down along the inner cavity of the cylinder barrel 1; due to the separation effect of the piston 3, the inner cavity of the cylinder barrel 1 is divided into an upper cavity and a lower cavity, and the liquid in the upper cavity and the liquid in the lower cavity can only mutually circulate through the spiral pipe 6 arranged in the piston 3; when the piston 3 slides, the liquid flows between the upper cavity and the lower cavity, and when the liquid flows through the spiral pipeline 6, the inertia force caused by the moving mass of the liquid is generated; the above structure constitutes the inerter portion in the vibration damping mechanism of the present invention, and the inerter satisfies the following relationship:
assuming that x is the amount of displacement of the piston 3 relative to the cylinder 1, the sliding speed of the piston 3 relative to the cylinder 1 is
Acceleration of the piston 3 is
According to the definition of inerter:
wherein F is the inertia force of the inerter, and b is the inerter coefficient of the inerter;
according to the principle of conservation of liquid volume, during the sliding process of the piston 3, the volume of a chamber compressed or expanded at the end part of the piston 3 is equal to the flow rate of the liquid in the spiral pipeline 6, namely:
wherein A is1Is the area of the end of the piston 3, A2Is the cross-sectional area of one spiral pipe in the spiral pipeline 6, and u is the flow velocity of the liquid in the spiral pipeline 6;
the kinetic energy stored by the inerter is equal to the kinetic energy of the liquid flowing in the spiral pipeline 6, namely:
wherein l is the pipeline length of one spiral pipe in the spiral pipeline 6, namely the pipeline length is equivalent to the straight line length of the straightened spiral pipe, and rho is the density of liquid in the pipeline;
substituting equation (2) into equation (3) yields:
as can be seen from equations (1) and (4): the larger the inertance coefficient b of the inertance vessel is, the larger the inertial force F is; the inertia coefficient b is related to the liquid density rho, the pipe length l of the spiral pipe and the end area A of the piston1And cross-sectional area A of the spiral tube2In this regard, the desired inerter can be obtained by adjusting the above parameters.
The liquid filled in the inner cavity of the cylinder barrel 1 is magnetorheological liquid 5, the exciting coil 2 is arranged on the outer circumference of the cylinder barrel 1, the strength of a magnetic field generated by the exciting coil 2 is controlled by changing the current, when the current input of the exciting coil 2 is increased to increase the magnetic field strength, the shearing yield strength of the magnetorheological liquid 5 is correspondingly increased, and further the damping force of the sliding of the piston 3 is increased, so that the magnetorheological damping part in the vibration damping mechanism is formed.
The spiral pipeline 6 used for communicating the two ends of the piston 3 can also be a single spiral pipe, but in practical application, when the sliding direction of the piston 3 is changed, the liquid flow direction in the single spiral pipe is also changed, so that the mutual impact among the liquid in the pipeline is caused, and the instability is caused; the double spiral pipes adopted by the preferred scheme of the invention are matched with the one-way valve, so that the circulation directions of the two spiral pipes are opposite, the constant flow direction of liquid in each spiral pipe is ensured, the flow impact in the liquid in the reversing process is avoided, and the stability of the whole device is improved.
The present invention is not limited to the above-described embodiments, and any obvious improvement, replacement or modification by those skilled in the art can be made without departing from the spirit of the present invention.
Claims (5)
1. The utility model provides an inertial volume and magnetic current become damping fusion formula suspension damping mechanism which characterized in that: the magnetorheological fluid damper comprises a cylinder barrel (1) and a piston (3), wherein an excitation coil (2) is wound on the outer wall of the cylinder barrel (1), a closed inner cavity is arranged in the cylinder barrel (1), and magnetorheological fluid (5) is filled in the inner cavity; the piston (3) is connected in the inner cavity in a sliding manner, a spiral pipeline (6) is arranged in the piston (3), and the spiral pipeline (6) is communicated with two ends of the piston (3); the piston (3) comprises a piston shell (31) and a piston core rod (33), the spiral pipeline (6) is wound between the piston shell (31) and the piston core rod (33), the spiral pipeline (6) is in sealing fit with the piston shell (31) and the piston core rod (33), and two ends of the spiral pipeline (6) extend out of the end part of the piston (3); the end part of one end of the piston (3) is fixedly connected with a plug rod (4), the plug rod (4) extends to the outside of the cylinder barrel (1), and the plug rod (4) is in sliding sealing fit with the end part of the cylinder barrel (1).
2. The inerter-magnetorheological damping fusion type suspension damping mechanism according to claim 1, characterized in that: the spiral pipeline (6) is of a double-spiral structure consisting of two spiral pipes, a one-way valve is arranged in each spiral pipe, and the circulation directions of the two spiral pipes are opposite.
3. The inerter-magnetorheological damping fusion type suspension damping mechanism according to claim 1, characterized in that: the plug rod (4) and the piston (3) are coaxial.
4. The inerter-magnetorheological damping fusion type suspension damping mechanism according to claim 1, characterized in that: the cylinder barrel (1) is of a cylindrical structure.
5. The inerter-magnetorheological damping fusion type suspension damping mechanism according to claim 1, characterized in that: the diameter of the plug rod (4) is smaller than that of the inner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389819.3A CN112594320B (en) | 2020-12-02 | 2020-12-02 | Inertial volume and magnetorheological damping fusion type suspension vibration damping mechanism |
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| CN202011389819.3A CN112594320B (en) | 2020-12-02 | 2020-12-02 | Inertial volume and magnetorheological damping fusion type suspension vibration damping mechanism |
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| CN112594320A CN112594320A (en) | 2021-04-02 |
| CN112594320B true CN112594320B (en) | 2022-06-21 |
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| CN109083967A (en) * | 2018-08-31 | 2018-12-25 | 南京理工大学 | A kind of spiral gas is used to be held |
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| US4185719A (en) * | 1976-04-23 | 1980-01-29 | Halliburton Company | Truck damping |
| JP2002048180A (en) * | 2000-07-31 | 2002-02-15 | Tokico Ltd | Hydraulic shock absorber |
| JP2008111548A (en) * | 2006-10-04 | 2008-05-15 | Kayaba Ind Co Ltd | Pneumatic buffer |
| CN103644248A (en) * | 2013-12-13 | 2014-03-19 | 江苏大学 | Inerter and damping controllable magneto-rheological inerter device and control method thereof |
| CN106051022A (en) * | 2016-05-09 | 2016-10-26 | 江苏大学 | Hydraulic mem-inerter device and application thereof |
| CN109083967A (en) * | 2018-08-31 | 2018-12-25 | 南京理工大学 | A kind of spiral gas is used to be held |
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