CN102829127A - Magneto-rheological damper of automobile engine suspension system - Google Patents
Magneto-rheological damper of automobile engine suspension system Download PDFInfo
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- CN102829127A CN102829127A CN201210352023XA CN201210352023A CN102829127A CN 102829127 A CN102829127 A CN 102829127A CN 201210352023X A CN201210352023X A CN 201210352023XA CN 201210352023 A CN201210352023 A CN 201210352023A CN 102829127 A CN102829127 A CN 102829127A
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Abstract
The invention discloses a magneto-rheological damper of an automobile engine suspension system, comprising a main rubber spring, a throttling disk, a magnetic core assembly and a decoupling film, wherein the damper is used for regulating the magnetic induction intensity at a magneto-rheological liquid channel in the magnetic core assembly through controlling the excitation current of an electromagnetic coil and then regulating the viscosity of magneto-rheological liquid at the magneto-rheological liquid channel to achieve the optimal damping effect. When the magneto-rheological damper is used, the turbulence level of the magneto-rheological liquid in a liquid feeding chamber can be increased through the throttling disk, the high-frequency dynamic hardening of the damper can be effectively inhibited, and the effectively damping frequency range can be widened. The damper has a more ideal dynamic characteristic and meets the use requirement for damping the automobile engine suspension system with high rotating speed; in addition, the damping capacity, the work stability and the convenience in assembly of the damper are improved through improving a floating decoupling film type decoupler, a sealing structure of the magnetic core assembly, a liquid injection hole structure and the like.
Description
Technical field
The present invention relates to isolation mounting, particularly a kind of magnetic rheological isolator that is used for the motor car engine suspension system.
Background technique
Magnetic flow liquid is the material that its yield stress and viscosity can change with externally-applied magnetic field, and this variation has quick, reversible and controlled characteristics, and based on these characteristics, magnetorheological fluid power is used for the device of externally-applied magnetic field control, like break, vibration isolator etc.The principle of magnetic rheological isolator is to regulate the damping and the rigidity of vibration isolator through the mobile resistance that is produced of magnetic flow liquid, thereby makes vibration attenuation, and its vibration isolation rate can be controlled through externally-applied magnetic field.
Existing motor car engine suspension system magnetic rheological isolator generally is made up of housing, rubber spring, magnetic core, rubber counterdie and Sealing.Existing motor car engine suspension system magnetic rheological isolator exists following what time not enough: 1) no decoupling zero film is perhaps only extenuated dynamic sclerosis of high frequency through the decoupling zero film, makes vibration isolator high-frequency vibration isolation performance undesirable; 2) upper liquid chamber is not provided with the throttling dish, can not effectively improve the high-frequency vibration isolation performance of vibration isolator; 3) traditional vibration isolator is provided with liquid filling hole, exhaust port is set in reinforced block at the housing middle part, makes its easy leakage; 4) decoupler is set separately, number of parts is increased, influence manufacturing efficiency; 5) frequency range of the existing effective vibration isolation of magnetic rheological isolator is limited, does not satisfy the vibration isolation usage requirement of rev-happy engine suspension system.
Therefore, need to explore a kind of new automobile engine mounting system magnetic rheological isolator, make it overcome above-mentioned shortcoming, make anti-vibration performance more superior, more stable work, reliable, simple in structure, avoid leakage and be convenient to operation such as fluid injection to enhance productivity.
Summary of the invention
In view of this; The present invention provides a kind of motor car engine suspension system magnetic rheological isolator; This vibration isolator in the set inside of core assembly decoupler; And increasing the turbulence scale of magnetic flow liquid in the upper liquid chamber through the throttling dish, the high frequency that effectively suppresses vibration isolator dynamically hardens, and widens effective isolation frequency scope.This vibration isolator has desirable dynamic characteristic; Can satisfy the usage requirement of rev-happy engine suspension system vibration isolation; In addition, through decoupler, core assembly sealing configuration, liquid filling hole structure etc. are improved, vibration isolation ability, the working stability of vibration isolator, the convenience of assembling have been improved.
The present invention solves the problems of the technologies described above through following technological means:
Motor car engine suspension system magnetic rheological isolator of the present invention; Comprise the housing of rubber spring, open-topped and be arranged at the core assembly of enclosure interior; Said rubber spring setting also is plugged in housing open-topped place; Said rubber spring is provided with and is used for the connecting rod that vibration isolator is installed, and said housing inside bottom is provided with the rubber counterdie, between said rubber counterdie and the core assembly, respectively form a chamber that is full of magnetic flow liquid between core assembly and the rubber spring; Said core assembly is provided with the magnetic flow liquid passage that is communicated with two chambers, and the middle part of said core assembly is provided with decoupler; Be provided with the throttling dish in the chamber between said core assembly and the rubber spring, form the flow-disturbing liquid chamber between said throttling dish and the decoupler.
Further, an end of said connecting rod passes rubber spring and the chamber middle part that stretches between core assembly and the rubber spring is fixedly connected with said throttling dish.
Further; Said core assembly comprises the inner magnetic core that is arranged at core assembly middle part, surround said inner magnetic core and with inner magnetic core between form the magnetic flow liquid passage outer magnetic core, be wound with the coil base of electromagnetic coil and the magnetic isolation board that is fixedly connected with coil base with inner magnetic core, outer magnetic core respectively; Said inner magnetic core is made up of inner magnetic core top and inner magnetic core bottom; Outer magnetic core is made up of outer magnetic core top and outer magnetic core bottom, seals in the middle of said outer magnetic core top is held in said coil base clips with outer magnetic core bottom and to a side that is wound with electromagnetic coil on the coil base.
Further; Said inner magnetic core top and inner magnetic core bottom are the two-sided groove spare that groove bottom has a plurality of through holes; The groove surface of said inner magnetic core top and inner magnetic core bottom fastens each other and forms the decoupling zero liquid chamber, is suspended with floating type decoupling zero film with holes in the said decoupling zero liquid chamber and forms said decoupler.
Further; Said inner magnetic core top and inner magnetic core bottom are the two-sided step groove part that groove bottom has a plurality of through holes; The step groove face of said inner magnetic core top and inner magnetic core bottom fastens each other and forms the decoupling zero liquid chamber, is provided with fixed decoupling zero film with holes in the said decoupling zero liquid chamber and forms said decoupler.
Further; Said housing comprises upper shell and lower shell body; The inboard of said upper shell and lower shell body respectively has a step surface, and the step surface of said lower shell body is provided with annular groove, and said outer magnetic core bottom is pressed on the top of rubber counterdie in the said annular groove; The lower end surface of said upper shell respectively is provided with a circle with the upper-end surface of lower shell body and forms in order to be fixedly connected the flange of upper and lower casing perpendicular to the outstanding outward edge of housing shaft alignment; The bottom of said lower shell body is provided with vent and is used for a side and atmosphere with the rubber counterdie.Said housing adopts the aluminum alloy NULL to process.
Further, the end near housing on the said coil base is provided with the outlet notch, and said outer magnetic core top is disposed radially the fairlead that communicates with the outlet notch, and said upper shell is provided with the wire outlet hole that communicates with the fairlead on outer magnetic core top.
Further, the face that matches with housing of said outer magnetic core bottom is provided with seal ring; The flange fitting surface of said upper shell and lower shell body is provided with seal ring.
Further; Also be provided with reinforced block on the said rubber spring; Said reinforced block is provided with the fluid injection exhaust port, and said fluid injection exhaust port comprises the tapped hole that runs through reinforced block and coaxial with it and run through the unthreaded hole of rubber spring bottom, and the fluid injection exhaust port adopts seal ring and screw to seal.
Further, the bottom of said lower shell body is provided with and is used for the tapped hole that vibration isolator is installed.
Beneficial effect of the present invention: motor car engine suspension system magnetic rheological isolator of the present invention has the following advantages:
1) adopts turbulence structure; The motion of vibration isolator work time flow table strengthens upper liquid chamber liquid turbulent flow; The resonance response that effectively suppresses interior decoupling zero film of decoupler and subsidiary fluid column thereof; Dynamically harden thereby suppress the vibration isolator high frequency, improve the vibration isolation ability of vibration isolator, and can reach the purpose of widening the isolation frequency scope;
2) adopt have fluid injection and two kinds of functions of exhaust concurrently the large diameter hole structure as the fluid injection exhaust port, the structure of simplification vibration isolator is improved sealability;
3) inner magnetic core top and inner magnetic core bottom all are designed to two-sided groove spare with holes, both combinations promptly form the decoupler liquid chamber, make the vibration isolator designs simplification, are easy to assembling;
4) housing is divided into upper shell and lower shell body and makes and install easylier that in addition, housing adopts the aluminum alloy NULL, the magnetic circuit leakage field weakens when making its work;
5) bottom with lower shell body thickens and is provided with the blind hole that band is installed screw thread, makes vibration isolator of the present invention to be fixedly connected with the screw rod that has setting angle, is easy to assembling, and makes the rubber counterdie be difficult for being damaged;
6) structural design of coil base makes the coiling of electromagnetic coil more convenient, prevents the corrosion of magnetic flow liquid to coil, and can effectively avoid the fairlead leakage.
Description of drawings
Below in conjunction with accompanying drawing and embodiment invention is further described.
Fig. 1 is the structural representation that is provided with the vibration isolator of floating type decoupling zero film;
Fig. 2 is the A-A cutting plane schematic representation of Fig. 1;
Fig. 3 is the housing ring-buckling type package structure schematic representation among the present invention;
Fig. 4 is the fixedly decoupling zero membrane type decoupler schematic representation among the present invention.
Embodiment
Below will combine accompanying drawing that the present invention is elaborated; As illustrated in fig. 1 and 2: motor car engine suspension system magnetic rheological isolator of the present invention; Comprise the housing of rubber spring 1, reinforced block 5, open-topped and be arranged at the core assembly of enclosure interior; Said housing comprises upper shell 2 and lower shell body 3; The upper-end surface of the lower end surface of said upper shell 2 and lower shell body 3 respectively is provided with a circle and forms flange 22 perpendicular to the outstanding outward edge of housing shaft alignment, and bolt is packed in the hole on the flange plate, screws in nut again and compresses and realize being fixedly connected of upper shell 2 and lower shell body 3.Said rubber spring 1 is provided with and is plugged in the opening on housing top, is provided with one heart on this rubber spring 1 to be used for the connecting rod 6 that vibration isolator is installed, and an end that exposes rubber spring 1 on the said connecting rod 6 has outside thread.Said rubber spring 1 carries out bonding through rubber vulcanization process and upper shell 2, reinforced block 5 and connecting rod 6, said connecting rod 6 is fixedly connected with reinforced block 5 through the center screw thread of reinforced block 5.Said housing inside bottom is provided with rubber counterdie 4; Between said rubber counterdie 4 and the core assembly, respectively form a chamber that is full of magnetic flow liquid between core assembly and the rubber spring 1; Said core assembly is provided with the magnetic flow liquid passage 8 that is communicated with two chambers, and the middle part of said core assembly is provided with decoupler; Be provided with throttling dish 7 in the chamber between said core assembly and the rubber spring 1, form the flow-disturbing liquid chamber between said throttling dish 7 and the decoupler.One end of said connecting rod 6 is provided with internal thread and ladder platform; An end that has internal thread on this connecting rod 6 pass rubber spring 1 and stretch to core assembly and rubber spring 1 between the chamber middle part, said throttling dish 7 withstands the ladder platform of connecting rod 6 ends and screws in screw in compression realizes that both are fixedly connected.
When vibration isolator is worked; Connecting thread bar 6 drives rubber spring 1 and throttling dish 7 downlink or uplinks, and magnetic flow liquid flows through magnetic flow liquid passage 8 and produces damping force, makes vibration attenuation; Change the magnetic intensity that core assembly produced through impressed current; Can change the character such as viscosity of magnetic flow liquid, the rigidity and the damping that make vibration isolator are with motor excited frequency and magnitude, so that motor is minimum to the vibrational energy of vehicle frame transmission; The decoupler that the core assembly middle part forms when low frequency large amplitude exciting is in " closing " state; The decoupler that the core assembly middle part forms when the little amplitude exciting of high frequency is in " unlatchings " state, and the high frequency flow-disturbing effect of while throttling dish makes " unlatching " state of decoupler widen the maximum speed to motor, has greatly improved the high-frequency vibration isolation performance of vibration isolator.
Further improvement as technique scheme; Said core assembly comprises the inner magnetic core, the outer magnetic core that surrounds said inner magnetic core that are arranged at core assembly middle part, is wound with the coil base 15 of electromagnetic coil 14 and the magnetic isolation board 13a, the 13b that are fixedly connected with inner magnetic core, outer magnetic core and coil base 15 respectively; Said inner magnetic core respectively is provided with upper and lower two parts with outer magnetic core, seals in the middle of said outer magnetic core top 11c is held in said coil base 15 clips with outer magnetic core bottom 11d and to a side that is wound with electromagnetic coil on the coil base 15.Said inner magnetic core, outer magnetic core are arranged to upper and lower two parts separately, make said core assembly be more convenient for installing.As alternative, said coil base 15 also can be arranged between inner magnetic core top 11a and the inner magnetic core bottom 11b, but the radial dimension of decoupler can be restricted.
Further improvement as technique scheme; Said inner magnetic core top 11a and inner magnetic core bottom 11b are the two-sided groove spare that groove 18a, 18b bottom have a plurality of through hole 20a; The groove surface of said inner magnetic core top 11a and inner magnetic core bottom 11b fastens each other and forms the decoupling zero liquid chamber, is suspended with floating type decoupling zero film 12a with holes in the said decoupling zero liquid chamber and forms said decoupler.Utilize the two-sided groove structure of inner magnetic core top 11a and inner magnetic core bottom 11b to form said decoupler, have advantages such as simple in structure, that cost of production is low.
Alternative as technique scheme; As shown in Figure 4; Said inner magnetic core top 11a and inner magnetic core bottom 11b are the two-sided step groove part that groove bottom has a plurality of through hole 20b; The step groove face of said inner magnetic core top 11a and inner magnetic core bottom 11b fastens each other and forms the decoupling zero liquid chamber; Be provided with fixed decoupling zero film 12b with holes in the said decoupling zero liquid chamber, said fixed decoupling zero film 12b is fixed to be clamped in the step groove that inner magnetic core top 11a and inner magnetic core bottom 11b form and forms fixedly decoupling zero membrane type decoupler.The vibration isolating effect of said fixedly decoupling zero membrane type decoupler when dither is obvious.
Further improvement as technique scheme; Said housing comprises upper shell 2 and lower shell body 3; Said upper shell 2 respectively has a step surface with the inboard of lower shell body 3; The step surface of said lower shell body 3 is provided with annular groove 21, and said outer magnetic core bottom 11d is pressed on the top of rubber counterdie 4 in the said annular groove 21.On the lower shell body 3 step surface is being set and annular groove 21 can improve the sealing between rubber counterdie 4 and the housing, and then is preventing the leakage accident.In addition, the bottom of said lower shell body 2 is provided with vent 17 and is used for a side and atmosphere with rubber counterdie 4.During work; The descending drive rubber spring of connecting rod presses down magnetic flow liquid, makes magnetic flow liquid flow in the chamber between core assembly and the rubber counterdie 4, and rubber counterdie 4 expansions this moment are with the descending power of auxiliary yielding rubber master spring; When the up drive rubber spring of connecting rod is up; It is big that chamber volume between rubber spring and the core assembly becomes, and magnetic flow liquid flow into the chamber between rubber spring and the core assembly from cavity of resorption, and rubber counterdie 4 contractions this moment are with the up power of auxiliary buffering connecting rod.Vent 17 is set in the bottom of lower shell body 3 makes rubber counterdie 4 when expanding or shrink, can not receive the influence of pressure change.In addition, the housing described in the present embodiment adopts the aluminum alloy NULL to process, and the magnetic circuit leakage field weakens when making vibration isolator work.As the alternative of technique scheme, of Fig. 3, the lower end of said upper shell 2 can adopt ring fastening type to be fixedly connected with the upper end of lower shell body 3, and this kind structure helps sealing, and can effectively prevent leakage, can select for use for the vibration isolator that does not need the dismounting debugging.
Further improvement as technique scheme; End near housing on the said coil base 15 is provided with outlet notch 19a; Said outer magnetic core top 11c is disposed radially the fairlead 19b that communicates with outlet notch 19a, and said upper shell 2 is provided with the wire outlet hole 19c that communicates with the fairlead 19b of outer magnetic core top 11c.During use, lead-in wire passes from above-mentioned slotted eye, and outlet notch 19a, fairlead 19b and wire outlet hole 19c adopt epoxy resin to seal.Adopt said structure to seal lead-in wire effectively, thereby avoiding going between receive the corrosion of magnetic flow liquid.
As the further improvement of technique scheme, be provided with two seal ring 16a, 16b vertically on said outer magnetic core bottom 11d and the face that housing matches; Said upper shell 2 is provided with seal ring 16c with flange 22 fitting surfaces of lower shell body 3.Can greatly improve the sealability between core assembly and the housing in that multiple-sealed ring is set between housing and the core assembly, and then avoid flowing into the slit of magnetic flow liquid between housing and core assembly field coil or flow out housing.
Further improvement as technique scheme; Said reinforced block 5 is provided with fluid injection exhaust port 10; Said fluid injection exhaust port 10 comprises the tapped hole that runs through reinforced block and coaxial with it and run through the unthreaded hole of rubber spring bottom, and fluid injection exhaust port 10 adopts seal rings and screw 10a to seal.Employing has the large diameter hole structure of fluid injection and two kinds of functions of exhaust concurrently as the fluid injection exhaust port, simplifies the structure of vibration isolator, improves sealability.
As the further improvement of technique scheme, the bottom of said lower shell body 3 is provided with and is used for the tapped hole 9 that vibration isolator is installed.The bottom of lower shell body is thickened and be provided with the blind hole that band is installed screw thread, make vibration isolator of the present invention to be fixedly connected, be easy to assembling, and make the rubber counterdie be difficult for being damaged with the screw rod that has setting angle.
Explanation is at last; Above embodiment is only unrestricted in order to the technological scheme of explanation invention; Although with reference to preferred embodiment invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of invention; And not breaking away from the aim and the scope of inventing technological scheme, it all should be encompassed in the middle of the claim scope of invention.
Claims (10)
1. motor car engine suspension system magnetic rheological isolator; Comprise the housing of rubber spring (1), open-topped and be arranged at the core assembly of enclosure interior; Said rubber spring (1) is provided with and is plugged in housing open-topped place; Said rubber spring (1) is provided with and is used for the connecting rod (6) that vibration isolator is installed, and said housing inside bottom is provided with rubber counterdie (4), between said rubber counterdie (4) and the core assembly, respectively form a chamber that is full of magnetic flow liquid between core assembly and the rubber spring (1); Said core assembly is provided with the magnetic flow liquid passage (8) that is communicated with two chambers, and it is characterized in that: the middle part of said core assembly is provided with decoupler; Be provided with throttling dish (7) in the chamber between said core assembly and the rubber spring (1), form the flow-disturbing liquid chamber between said throttling dish (7) and the decoupler.
2. motor car engine suspension system magnetic rheological isolator according to claim 1 is characterized in that: an end of said connecting rod (6) passes rubber spring (1) and the chamber middle part that stretches between core assembly and the rubber spring (1) is fixedly connected with said throttling dish (7).
3. motor car engine suspension system magnetic rheological isolator according to claim 2; It is characterized in that: said core assembly comprises the inner magnetic core that is arranged at core assembly middle part, surround said inner magnetic core and with inner magnetic core between form magnetic flow liquid passage (8) outer magnetic core, be wound with the coil base (15) of electromagnetic coil (14) and the magnetic isolation board (13a, 13b) that is fixedly connected with inner magnetic core, outer magnetic core and coil base (15) respectively; Said inner magnetic core is made up of inner magnetic core top (11a) and inner magnetic core bottom (11b); Outer magnetic core is made up of outer magnetic core top (11c) and outer magnetic core bottom (11d), seals in the middle of said outer magnetic core top (11c) and outer magnetic core bottom (11d) are held in said coil base (15) clips and to a side that is wound with electromagnetic coil on the coil base (15).
4. motor car engine suspension system magnetic rheological isolator according to claim 3; It is characterized in that: said inner magnetic core top (11a) is the two-sided groove spare that groove (18a, 18b) bottom has a plurality of through holes (20a) with inner magnetic core bottom (11b); Said inner magnetic core top (11a) fastens formation decoupling zero liquid chamber each other with the groove surface of inner magnetic core bottom (11b), is suspended with floating type decoupling zero film (12a) with holes in the said decoupling zero liquid chamber and forms said decoupler.
5. motor car engine suspension system magnetic rheological isolator according to claim 3; It is characterized in that: said inner magnetic core top (11a) is the two-sided step groove part that groove (18a, 18b) bottom has a plurality of through holes (20b) with inner magnetic core bottom (11b); Said inner magnetic core top (11a) fastens formation decoupling zero liquid chamber each other with the step groove face of inner magnetic core bottom (11b), is provided with fixed decoupling zero film (12b) with holes in the said decoupling zero liquid chamber and forms said decoupler.
6. according to claim 4 or 5 described motor car engine suspension system magnetic rheological isolators; It is characterized in that: said housing comprises upper shell (2) and lower shell body (3); Said upper shell (2) respectively has a step surface with the inboard of lower shell body (3); The step surface of said lower shell body (3) is provided with annular groove (21), and said outer magnetic core bottom (11d) is pressed on the top of rubber counterdie (4) in the said annular groove (21); The lower end surface of said upper shell (2) respectively is provided with a circle with the upper-end surface of lower shell body (3) and forms flange (22) in order to be fixedly connected upper and lower casing perpendicular to the outstanding edge of housing shaft alignment outward; The bottom of said lower shell body (2) is provided with vent (17) and is used for a side and atmosphere with rubber counterdie (4).
7. motor car engine suspension system magnetic rheological isolator according to claim 6; It is characterized in that: the end that said coil base (15) is gone up near housing is provided with outlet notch (19a); Said outer magnetic core top (11c) is disposed radially the fairlead (19b) that communicates with outlet notch (19a), and said upper shell (2) is provided with the wire outlet hole (19c) that communicates with the fairlead (19b) on outer magnetic core top (11c).
8. motor car engine suspension system magnetic rheological isolator according to claim 7 is characterized in that: the face that matches with housing in said outer magnetic core bottom (11d) is provided with seal ring (16a, 16b); Said upper shell (2) is provided with seal ring (16c) with flange (22) fitting surface of lower shell body (3).
9. motor car engine suspension system magnetic rheological isolator according to claim 8; It is characterized in that: also be provided with reinforced block (5) on the said rubber spring (1); Said reinforced block (5) is provided with fluid injection exhaust port (10); Said fluid injection exhaust port (10) comprises the tapped hole that runs through reinforced block and coaxial with it and run through the unthreaded hole of rubber spring bottom, and fluid injection exhaust port (10) adopts seal ring and screw (10a) to seal.
10. motor car engine suspension system magnetic rheological isolator according to claim 9 is characterized in that: the bottom of said lower shell body (3) is provided with and is used for the tapped hole (9) that vibration isolator is installed.
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