CN108869611B - Passenger car engine multi-mode magneto-rheological vibration isolator - Google Patents
Passenger car engine multi-mode magneto-rheological vibration isolator Download PDFInfo
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- CN108869611B CN108869611B CN201810808229.6A CN201810808229A CN108869611B CN 108869611 B CN108869611 B CN 108869611B CN 201810808229 A CN201810808229 A CN 201810808229A CN 108869611 B CN108869611 B CN 108869611B
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Electromagnetism (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
The invention discloses a multi-mode magneto-rheological vibration isolator for an engine of a passenger car, which comprises an upper shell, a lower shell, a rubber main spring, a connecting rod, a rubber bottom membrane and a magnetic core assembly, wherein the lower shell is fixedly buckled with the upper shell; the magnetic core assembly comprises an extrusion magnetic core fixed at the lower end of the elastic body, an inner magnetic core group which is adapted to the shape of the extrusion magnetic core and is externally wrapped on the extrusion magnetic core at intervals and is in a cylindrical shell shape, an outer magnetic core ring which is externally wrapped on the inner magnetic core group at intervals along the radial direction, and a magnetism isolating assembly which is externally wrapped on the outer magnetic core ring and the inner magnetic core group; the vibration isolation frequency range of the magnetorheological hydraulic mount and the controllable dynamic stiffness range of the mount can be widened, and the working reliability of the vibration isolation device is ensured.
Description
Technical Field
The invention relates to a magnetorheological hydraulic suspension for an engine, in particular to a multimode magnetorheological vibration isolator for a passenger car engine.
Background
The viscosity and yield stress of the magnetorheological fluid can change along with the change of an external magnetic field, and the change has the characteristics of quickness, reversibility and controllability. The magneto-rheological vibration isolator utilizes the characteristic of magneto-rheological liquid, changes the output damping force of the magneto-rheological hydraulic mount by controlling the current in the excitation coil to change the magnetic field intensity, thereby attenuating the vibration of the engine, and the process has quick response, continuous and reversible process.
The existing magnetorheological suspension of the vibration isolation system of the automobile engine generally comprises a shell, a main rubber spring, a magnetic core, a rubber bottom film and a sealing element, and has the following defects: 1) most of traditional magneto-rheological hydraulic suspensions are in single modes such as shearing, flowing or extruding modes, the flowing mode has good controllability but cannot provide large damping force at low frequency, and the extruding mode can provide large damping force at low frequency but has poor controllability as compared with the flowing mode, so that the vibration isolation effect of the suspension system is limited; 2) the dynamic hardening phenomenon of the magnetorheological fluid suspension under high frequency is more prominent due to the higher viscosity of the magnetorheological fluid; 3) the existing magneto-rheological hydraulic suspension has limited vibration isolation frequency range and dynamic stiffness of the suspension, and can not meet the use requirements of an automobile engine under various working conditions
Disclosure of Invention
In view of the above, the invention aims to overcome the defects in the prior art, provide a multi-mode magneto-rheological vibration isolator for a passenger vehicle engine, and provide a magneto-rheological hydraulic suspension structure which can widen the vibration isolation frequency range of the magneto-rheological hydraulic suspension and the controllable range of the dynamic stiffness of the suspension and ensure the reliable operation of the magneto-rheological hydraulic suspension structure on the premise of not changing the external size of the magneto-rheological hydraulic suspension.
The invention discloses a multi-mode magneto-rheological vibration isolator for a passenger vehicle engine, which comprises an upper shell, a lower shell, a rubber main spring, a connecting rod, a rubber bottom membrane and a magnetic core assembly, wherein the lower shell is fixedly buckled with the upper shell; the magnetic core assembly comprises an extrusion magnetic core fixed at the lower end of the elastic body, an inner magnetic core group which is adapted to the shape of the extrusion magnetic core and is externally wrapped on the extrusion magnetic core at intervals and is in a cylindrical shell shape, an outer magnetic core ring which is externally wrapped on the inner magnetic core group at intervals along the radial direction, and a magnetism isolating assembly which is externally wrapped on the outer magnetic core ring and the inner magnetic core group;
the magnetic isolation assembly comprises an upper magnetic isolation plate, a lower magnetic isolation plate and an annular magnetic isolation seat, wherein the upper magnetic isolation plate and the lower magnetic isolation plate are arranged in parallel; a through hole for the extrusion magnetic core to pass through is formed in the center of the upper magnetic isolation plate, the inner magnetic core group comprises an inner magnetic core seat with a U-shaped groove structure in vertical section and inner magnetic core rings sleeved outside the inner magnetic core seat at intervals, and a magnetic isolation sleeve is arranged between the inner magnetic core seat and the inner magnetic core ring; the outer magnetic core ring and the extrusion magnetic core are both provided with excitation coils;
an axial flow channel is formed between the inner magnetic core ring and the outer magnetic core ring, an inertia channel is axially arranged on the annular magnetic isolation seat, and a first decoupling film is arranged in the inertia channel; the bottom of the inner magnetic core seat and the middle of the lower magnetic isolation plate are both provided with holes to form an extrusion channel communicated with the upper cavity and the lower cavity, and a second decoupling film is arranged in the extrusion channel.
Furthermore, a throttle disc is fixedly arranged on the connecting rod and is positioned between the elastic body and the rubber main spring.
Furthermore, a reinforcing block is fixedly arranged at the upper end of the rubber main spring, and the upper end of the connecting rod is fixedly connected with the reinforcing block through a central thread of the reinforcing block and is axially positioned.
Further, a liquid injection hole and an exhaust hole are formed in the reinforcing block; annotate liquid hole and exhaust hole and all including the screw hole that runs through the boss and rather than the unthreaded hole that is located the rubber master spring that link up, annotate liquid hole and exhaust hole and all adopt sealing washer and fastening screw to seal.
Furthermore, wire channels are arranged in the extrusion magnetic core, the elastic body and the connecting rod, and a sealing ring is arranged in the elastic body wire channel; and coil wire channels are arranged in the outer magnetic core ring and the annular magnetic isolation seat, threaded holes are formed in the lower shell corresponding to the wire channels, and sealing rings and sealing screws with through holes are arranged in the threaded holes.
Further, a sealing ring is arranged on the matching surface of the lower shell and the upper shell, and the upper shell and the lower shell are connected through a bolt.
Furthermore, the bottom of the inner magnetic core seat and the lower magnetic isolation plate form a squeezing channel in the middle, and the squeezing channel is staggered with the position of the throttling hole.
Further, the inner side surface of the lower shell is provided with a step surface, and the two ends of the rubber bottom membrane are pressed on the step surface of the lower shell by the lower magnetism isolating plate.
Further, the rubber main spring is respectively and fixedly connected with the upper shell and the reinforcing block through a vulcanization process; the upper shell and the lower shell are made of magnetism-isolating aluminum alloy materials.
Further, the part of the upper end of the connecting rod exposed out of the upper shell is provided with an external thread used for being connected with an engine, and the top of the elastic body is inwards sunken to form a screw hole used for being connected with the connecting rod in a threaded mode.
The invention has the beneficial effects that: the invention discloses a multi-mode magneto-rheological vibration isolator for a passenger car engine, which has the following advantages that:
(1) adopting a flow, extrusion and shear mixed mode structure, and arranging an extrusion magnetic core, an inner magnetic core and an outer magnetic core to form a flow, extrusion and shear damping channel; the extrusion magnetic core is provided with two sets of magnet exciting coils, and the outer magnetic core is provided with a set of magnet exciting coils; when the engine vibrates, the connecting rod, the throttling disc and the extrusion magnetic core are driven to vibrate together, and magnetorheological fluid in a damping channel between the extrusion magnetic core and the inner magnetic core is extruded and sheared under the control of the excitation coil, so that the damping channel can meet the output requirement of large damping; meanwhile, the working performance of the engine suspension is more reliable, the vibration isolation requirement of the engine suspension in a wider frequency range is met, and the vibration isolation capability of the suspension is improved.
(2) An elastic body is arranged between the extrusion magnetic core and the connecting rod, and the elastic body is driven to vibrate when the engine vibrates, so that the hardening phenomenon of the magnetorheological fluid when the suspension vibrates at high frequency can be effectively relieved, and the vibration isolation range of the suspension is widened.
(3) The inner magnetic core is separated by the magnetic separation sleeve to avoid magnetic circuit coupling and improve the working safety and reliability of suspension.
(4) The upper end of the magnetic isolation seat is provided with a decoupling film, the lower end of the magnetic isolation seat is provided with an inertia channel, a combined structure of the inertia channel and the decoupling film is adopted, throttling holes of the inertia channel and the decoupling film are arranged in a staggered mode, when the engine vibrates at low frequency, the amplitude of the engine is large, the decoupling film stays on one side of the groove, the throttling holes and the inertia channel are closed, and large damping of suspension output is facilitated; when the vibration is carried out at high frequency, the decoupling film vibrates in the groove, the inertia channel and the throttling hole are opened, the suspension high-frequency hardening phenomenon is relieved, and the frequency range of suspension vibration isolation is effectively widened.
(5) The decoupling film and the extrusion channel are arranged in the groove between the bottom of the inner magnetic core and the top of the lower magnetic partition plate, when the extrusion force of the extrusion magnetic core is large, the magnetorheological fluid in the extrusion channel is easy to harden, when the suspension vibrates, the decoupling film vibrates in the groove, the hardening of the magnetorheological fluid in the extrusion channel is relieved, and the vibration isolation frequency range of the suspension is widened.
(6) The upper shell and the lower shell are made of magnetism-isolating aluminum alloy materials, so that magnetic flux leakage of a magnetic circuit is weakened when the magnetic circuit works.
(7) Adopt diplopore structure as annotating the liquid exhaust hole, make to annotate the liquid flowing back more convenient, simplify the structure of suspension, the operation of being convenient for.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the magnetic circuit of the present invention;
FIG. 3 is a schematic view of an upper magnetic shield according to the present invention;
FIG. 4 is a schematic view of a lower magnetic shield according to the present invention;
FIG. 5 is a perspective view of the upper magnetic shield of the present invention;
FIG. 6 is a perspective view of a lower magnetic shield of the present invention;
FIG. 7 is a perspective view of the magnetic core of the present invention;
fig. 8 is an assembly view of the inner and outer magnetic cores of the present invention.
Detailed Description
As shown in the figure, the multi-mode magneto-rheological vibration isolator of the passenger car engine in the embodiment is provided; the invention relates to a flow, extrusion and shear combined mode magneto-rheological vibration isolator which comprises an upper shell with an opening at the top end, a rubber main spring 10 arranged and blocked at the opening at the top end of an upper shell 8, a connecting rod 13 penetrating through the rubber main spring and a rubber basement membrane 2 arranged at the bottom of the inner side of a lower shell 1, wherein a closed cavity (comprising an upper cavity and a lower cavity) filled with magneto-rheological fluid is formed between the rubber main spring and the rubber basement membrane, a magnetic core assembly is arranged in the cavity, and the magnetic core assembly comprises an upper extrusion magnetic core 9 and a lower extrusion magnetic core (not marked) from inside to outside, an inner magnetic core seat 35 fixed between an upper magnetic separation plate 7 and a lower magnetic separation plate 32, an outer magnetic core ring 27 wound with an excitation coil 23 and an annular magnetic separation seat 26 provided with an inertia channel 3; the inner magnetic core ring is sleeved on the inner magnetic core seat at intervals, the upper extrusion magnetic core and the lower extrusion magnetic core are respectively wound with an excitation coil 21 and an excitation coil 22, and the upper extrusion magnetic core and the lower extrusion magnetic core are fixed at the lower end of the elastic body 19 by a set screw 20; a circumferential shearing channel and an axial extruding channel are arranged between the extruding magnetic core and the inner magnetic core seat, a flow channel 31 is arranged between the inner magnetic core ring and the outer magnetic core ring, a groove is arranged at the top of the annular magnetic isolation seat, a first decoupling film 4 with a throttling hole is placed in the groove, and an inertia channel staggered with the throttling hole (circumferential) is arranged on the annular magnetic isolation seat; the annular magnetism isolating seat is connected with the upper magnetism isolating plate and the lower magnetism isolating plate through set screws 28, and the outer magnetic core ring is fixed with the upper magnetism isolating plate and the lower magnetism isolating plate through positioning pins 30.
In the embodiment, the connecting rod 13 is provided with a throttle disc 17, and the throttle disc is positioned between the elastic body 19 and the rubber main spring 10; the throttle plate is a disc provided with a middle hole, and the side edge of the disc slightly inclines downwards and extends; the main reason that the throttle plate can reduce the high-frequency dynamic hardening degree is that the turbulent flow effect of the throttle plate increases the energy loss caused by the turbulent flow of the fluid in the upper liquid chamber, and the damping effect of the second-order nonlinear fluid is enhanced, so that the resonance response of the inertia liquid column is effectively inhibited.
In this embodiment, the rubber main spring is provided with a reinforcing block 16, and the upper end of the connecting rod is fixedly connected with the reinforcing block through a central thread of the reinforcing block and is axially positioned.
In the embodiment, the reinforcing block is provided with the liquid injection hole 15 and the exhaust hole 11, so that the exhaust is smoother and more convenient during liquid injection; annotate liquid hole and exhaust hole and all include the screw hole that runs through the boss and rather than the unthreaded hole that is located the rubber master spring that link up, annotate liquid hole and exhaust hole and all adopt sealing washer 12 and fastening screw to seal.
In this embodiment, the extrusion magnetic core 9, the elastic body 19 and the connecting rod 13 are provided with a wire passage 14, and the elastic body wire passage is provided with a sealing ring 18; a coil wire channel is arranged in the outer magnetic core ring 27 and the annular magnetic isolation seat 26, a threaded hole is formed in the lower shell corresponding to the wire channel, and a sealing ring 25 and a sealing screw 24 with a through hole are arranged in the threaded hole. The lead mode of this kind of structure compact structure, the lead wire is convenient, can effectively prevent magnetorheological suspensions from leaking.
In this embodiment, a sealing ring 5 is disposed on a mating surface of the lower housing 1 and the upper housing 8 to improve sealing performance. The bottom of the lower shell is provided with a vent hole, one side of the rubber basement membrane, which is not in contact with the magnetorheological fluid, is communicated with the atmosphere through the vent hole, and the rubber basement membrane is annular. The upper and lower housings are connected by bolts 6.
In this embodiment, a magnetic isolation sleeve 29 is arranged in the inner magnetic core holder, grooves are arranged at the bottom of the inner magnetic core holder and at the top of the lower magnetic isolation plate 32, a decoupling film 34 with a throttling hole is placed in the grooves, and an extrusion channel 33 staggered with the throttling hole is arranged at the bottom of the inner magnetic core holder and the lower magnetic isolation plate. The upper part of the lower magnetism isolating plate is provided with a step surface, so that the flow channel can be accurately positioned; when the suspension vibrates, the decoupling film vibrates in the groove, the phenomenon of hardening of the magnetorheological fluid in the extrusion channel is relieved, and the vibration isolation frequency range of the suspension is widened.
In this embodiment, a step surface is disposed on the inner side surface of the lower casing, and the lower magnetic isolation plate presses two ends of the rubber basement membrane against the step surface of the lower casing.
In the embodiment, the rubber main spring is respectively and fixedly connected with the upper shell and the reinforcing block through a vulcanization process; the upper shell and the lower shell are made of magnetism-isolating aluminum alloy materials.
The part of the upper end of the connecting rod, which is exposed out of the upper shell, is provided with an external thread used for being connected with an engine, and the top of the elastic body is inwards sunken to form a screw hole used for being connected with the connecting rod through the thread.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a passenger car engine multimode magnetic current becomes isolator which characterized in that: the magnetorheological fluid vibration isolator comprises an upper shell, a lower shell, a rubber main spring, a connecting rod, a rubber bottom membrane and a magnetic core assembly, wherein the lower shell is fixedly buckled with the upper shell, the rubber main spring is plugged at an opening at the top end of the upper shell, the connecting rod penetrates through the rubber main spring, the rubber bottom membrane is arranged at the bottom of the inner side of the lower shell, the magnetic core assembly is arranged above the rubber bottom membrane and divides the inner cavity of the vibration isolator into an upper cavity and a lower cavity, the inner cavity of; the magnetic core assembly comprises an extrusion magnetic core fixed at the lower end of the elastic body, an inner magnetic core group which is adapted to the shape of the extrusion magnetic core and is externally wrapped on the extrusion magnetic core at intervals and is in a cylindrical shell shape, an outer magnetic core ring which is externally wrapped on the inner magnetic core group at intervals along the radial direction, and a magnetism isolating assembly which is externally wrapped on the outer magnetic core ring and the inner magnetic core group;
the magnetic isolation assembly comprises an upper magnetic isolation plate, a lower magnetic isolation plate and an annular magnetic isolation seat, wherein the upper magnetic isolation plate and the lower magnetic isolation plate are arranged in parallel; a through hole for the extrusion magnetic core to pass through is formed in the center of the upper magnetic isolation plate, the inner magnetic core group comprises an inner magnetic core seat with a U-shaped groove structure in vertical section and inner magnetic core rings sleeved outside the inner magnetic core seat at intervals, and a magnetic isolation sleeve is arranged between the inner magnetic core seat and the inner magnetic core ring; the outer magnetic core ring and the extrusion magnetic core are both provided with excitation coils;
an axial flow channel is formed between the inner magnetic core ring and the outer magnetic core ring, an inertia channel is axially arranged on the annular magnetic isolation seat, and a first decoupling film is arranged in the inertia channel; the bottom of the inner magnetic core seat and the middle of the lower magnetic isolation plate are both provided with holes to form an extrusion channel communicated with the upper cavity and the lower cavity, and a second decoupling film is arranged in the extrusion channel.
2. The multimode magnetorheological vibration isolator for passenger car engines according to claim 1, wherein: the connecting rod is fixedly provided with a throttling disc, and the throttling disc is arranged between the elastic body and the rubber main spring.
3. The multimode magnetorheological vibration isolator for passenger car engines according to claim 2, wherein: the upper end of the connecting rod is fixedly connected with the reinforcing block through the central thread of the reinforcing block and is axially positioned.
4. The multimode magnetorheological vibration isolator for passenger car engines according to claim 3, wherein: the reinforcing block is provided with a liquid injection hole and an exhaust hole; annotate liquid hole and exhaust hole and all including the screw hole that runs through the boss and rather than the unthreaded hole that is located the rubber master spring that link up, annotate liquid hole and exhaust hole and all adopt sealing washer and fastening screw to seal.
5. The multimode magnetorheological vibration isolator for passenger car engines according to claim 4, wherein: a wire channel is arranged in the extrusion magnetic core, the elastic body and the connecting rod, and a sealing ring is arranged in the elastic body wire channel; and coil wire channels are arranged in the outer magnetic core ring and the annular magnetic isolation seat, threaded holes are formed in the lower shell corresponding to the wire channels, and sealing rings and sealing screws with through holes are arranged in the threaded holes.
6. The multimode magnetorheological vibration isolator for passenger car engines according to claim 5, wherein: and a sealing ring is arranged on the matching surface of the lower shell and the upper shell, and the upper shell and the lower shell are connected through a bolt.
7. The multimode magnetorheological vibration isolator for passenger car engines according to claim 6, wherein: and an extrusion channel staggered with the position of the throttling hole is formed between the bottom of the inner magnetic core seat and the lower magnetic isolation plate.
8. The multimode magnetorheological vibration isolator for passenger car engines of claim 7, wherein: the lower shell is internally provided with a step surface on the inner side, and the lower magnetic isolation plate compresses the two ends of the rubber bottom membrane on the step surface of the lower shell.
9. The multimode magnetorheological vibration isolator for passenger car engines of claim 8, wherein: the rubber main spring is respectively and fixedly connected with the upper shell and the reinforcing block through a vulcanization process; the upper shell and the lower shell are made of magnetism-isolating aluminum alloy materials.
10. The multimode magnetorheological vibration isolator for passenger car engines according to claim 9, wherein: the part of the upper end of the connecting rod, which is exposed out of the upper shell, is provided with an external thread used for being connected with an engine, and the top of the elastic body is inwards sunken to form a screw hole used for being connected with the connecting rod through the thread.
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| CN109404475B (en) * | 2018-12-12 | 2020-09-08 | 重庆交通大学 | Variable decoupling film rigidity mixed mode magneto-rheological vibration isolator |
| CN110107639B (en) * | 2019-05-05 | 2020-06-19 | 中国矿业大学 | Engine magnetorheological hydraulic mount based on mixed mode |
| CN110259876B (en) * | 2019-06-24 | 2021-08-13 | 重庆交通大学 | Double-cone-table type damping channel magneto-rheological vibration isolator |
| CN110259873B (en) * | 2019-06-28 | 2021-03-02 | 重庆交通大学 | Mixed-mode magneto-rheological vibration isolator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2562685B2 (en) * | 1989-01-30 | 1996-12-11 | 東海ゴム工業株式会社 | Vehicle fluid-filled mount device |
| US7118100B2 (en) * | 2004-04-16 | 2006-10-10 | Delphi Technologies, Inc. | Magnetorheological-fluid hydraulic mount |
| CN101089418A (en) * | 2007-05-14 | 2007-12-19 | 重庆大学 | Magnetic rheological isolator |
| CN103148158B (en) * | 2013-03-15 | 2015-01-07 | 重庆大学 | Magnetorheological hydraulic engine mount based on extrusion mode |
| CN104088955B (en) * | 2014-07-03 | 2016-01-20 | 重庆大学 | Based on the magnetorheological hydraulic engine mount of mixed mode |
| CN105927696B (en) * | 2016-07-07 | 2018-02-23 | 河南科技大学 | A kind of magnetorheological precision machine tool vibration isolator |
| CN106286687B (en) * | 2016-11-09 | 2018-08-24 | 重庆交通大学 | Flowing and the magnetic rheological isolator for squeezing integrated mode |
| CN108071731B (en) * | 2018-02-01 | 2024-03-01 | 华东交通大学 | Magnetorheological vibration absorber adopting radial arrangement of multiple exciting coils |
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Effective date of registration: 20230918 Address after: 401120 No. 19, Zhuoyue Road, Longxing Town, Liangjiang New Area, Yubei District, Chongqing (cluster registration) Patentee after: Huanshan (Chongqing) Technology Co.,Ltd. Address before: 402247 No. 1 Fuxing Road, Shuang Fu New District, Jiangjin District, Chongqing. Patentee before: CHONGQING JIAOTONG University |
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