CN108071731B - Magnetorheological vibration absorber adopting radial arrangement of multiple exciting coils - Google Patents
Magnetorheological vibration absorber adopting radial arrangement of multiple exciting coils Download PDFInfo
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- CN108071731B CN108071731B CN201810100221.4A CN201810100221A CN108071731B CN 108071731 B CN108071731 B CN 108071731B CN 201810100221 A CN201810100221 A CN 201810100221A CN 108071731 B CN108071731 B CN 108071731B
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- end cover
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000035939 shock Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a magnetorheological vibration absorber which adopts radial arrangement of a plurality of exciting coils, and mainly comprises an elastic shell, a magnetic core end cover, a magnetic core, an annular sleeve, an external magnetic yoke, a magnetic core bar, an exciting coil and the like. The magnetorheological vibration absorber is internally provided with a magnetic core, 6 magnetic core rods are uniformly arranged on the circumference of the outer surface of the magnetic core, and the other end of each magnetic core rod is provided with an excitation coil and an external magnetic yoke; an annular sleeve is arranged in the groove of the end face of the magnetic core. The magnetic core end cover, the annular sleeve and 6 circular through holes on the bottom surface of the magnetic core annular groove are mutually aligned to form a liquid flow channel of magnetorheological fluid together. When the external vibration is carried out, the elastic shell is pressed to deform, and the magnetorheological fluid in the closed cavity I enters the closed cavity II through the liquid flow channel. When the exciting coil is electrified, the magnetorheological fluid at the liquid flow channel generates controllable damping force to counteract impact generated by external vibration. The invention has the characteristics of compact structure and continuous and controllable performance, and is particularly suitable for vibration reduction occasions with limited space.
Description
Technical Field
The invention relates to a vibration absorber, in particular to a magnetorheological vibration absorber which adopts a plurality of exciting coils to be radially arranged.
Background
In systems such as an electromechanical integrated system and a generator, the stability and safety of the system are affected by the existence of vibration, so that a vibration absorbing and isolating device is required to absorb and attenuate the vibration.
The traditional vibration buffer devices, such as hydraulic shock absorbers, spring shock absorbers and the like, are fixed in the working range, cannot meet the shock absorption effect in a larger working range, and are discontinuous in work, so that the controllability and the stability of the system are affected. With the advent of intelligent material magnetorheological fluids, magnetorheological dampers using magnetorheological fluids as transmission media are widely used in vibration damping devices. The method has the advantages of high response speed, wide working frequency range, low energy consumption and the like, and is continuously applied to industries such as machinery, construction, aviation and the like.
An excitation coil is wound on a piston head of a traditional magnetorheological damper, and a magnetic field is generated under the action of loading current, so that magnetorheological fluid at a damping gap has a magnetorheological effect, and a controllable damping force is generated. However, the magnetorheological damper has a large external dimension, so that the application of the magnetorheological damper in occasions with limited space is limited.
Based on this, it is necessary to provide a magnetorheological damper with a plurality of exciting coils radially arranged, and by reasonably arranging the magnetic conductive members and the exciting coils and setting reasonable magnetorheological fluid channels, the structural size is shortened, so that better vibration absorbing effect and vibration reduction performance can be achieved in a limited space.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a magnetorheological vibration absorber which adopts a plurality of exciting coils to be radially arranged. The magneto-rheological vibration absorber is internally provided with a magnetic core, 6 magnetic core rods are uniformly arranged on the circumference of the outer surface of the magnetic core, and an excitation coil and an external magnetic yoke are arranged at the other end of the magnetic core rod; an annular sleeve is arranged in the end face groove of the magnetic core. The magnetic core end cover, the annular sleeve and 6 circular through holes on the bottom surface of the magnetic core annular groove are mutually aligned to form a liquid flow channel of magnetorheological fluid together. When the external vibration occurs, the elastic shell is deformed by pressure, so that the pressure of the closed cavity I is larger than that of the closed cavity II, and magnetorheological fluid in the closed cavity I is caused to enter the closed cavity II through the liquid flow channel; and (3) introducing current into the exciting coil to generate a magnetic field, and under the action of the magnetic field, generating a magneto-rheological effect through magneto-rheological fluid at the liquid flow channel to generate a controllable damping force so as to counteract impact generated by external vibration. The magneto-rheological vibration absorber has the characteristics of compact structure and continuous and controllable performance, and is particularly suitable for vibration reduction occasions with limited space.
The technical scheme adopted by the invention for solving the technical problems comprises the following steps: the magnetic core comprises a supporting plate (1), an elastic shell (2), a shell (3), a magnetic core end cover (4), a magnetic core (5), an annular sleeve (6), a coil upper end cover (7), an annular base plate (8), an elastic membrane (9), a supporting cover (10), a sealing gasket (11), a connecting shaft (12), a locking nut (13), a coil lower end cover (14), a fixing plate (15), an external magnetic yoke (16), a magnetic core rod (17), an exciting coil (18), a baffle plate (19) and a fastening gasket (20); rectangular patterns are processed at the lower end of the supporting plate (1), and grooves are processed in the elastic shell (2); the supporting plate (1) is fixedly connected with the elastic shell (2) through embedding; the elastic shell (2) is fastened and connected with the shell (3) through screws and fastening gaskets (20); a circular through hole is processed in the center of the upper end face of the shell (3); a circular groove is processed on the lower end surface of the shell (3); the bottom surface of the circular groove of the shell (3) is tightly contacted with the upper end surface of the magnetic core (5); the inner surface of the circular groove of the shell (3) is in clearance fit with the outer surface of the magnetic core (5), and is sealed by a sealing ring; 6 circular through holes are uniformly formed in the circumferential direction of the outer surface of the shell (3), and the 6 circular through holes are respectively in interference fit with the circumferential outer surfaces of the 6 magnetic core rods (17); the lower end face of the magnetic core end cover (4) is provided with a first annular groove (25), and the bottom face of the first annular groove (25) is tightly contacted with the upper end face of the annular sleeve (6); the end face of the magnetic core end cover (4) is provided with 6 first circular through holes (26) which are uniformly distributed, and the end face of the annular sleeve (6) is provided with 6 second circular through holes (27) which are uniformly distributed; the end face of the magnetic core (5) is provided with a second annular groove (21), and the bottom surface of the second annular groove (21) is tightly contacted with the lower end face of the annular sleeve (6); the bottom surface of the second annular groove (21) of the magnetic core (5) is provided with 6 third circular through holes (22) which are uniformly distributed; the first circular through hole (26), the second circular through hole (27) and the third circular through hole (22) are mutually aligned along the axial direction and form a liquid flow channel of magnetorheological fluid together; the magnetic core end cover (4) is fixedly connected with the magnetic core (5) through a screw; 6 circular holes (24) are uniformly formed in the circumferential direction on the outer surface of the magnetic core (5), and are respectively in close contact with the outer surfaces of one ends of the 6 magnetic core rods (17); the lower end surface of the magnetic core (5) is tightly contacted with the upper end surface of the annular base plate (8); the lower end surface of the annular base plate (8) is tightly contacted with the upper end surface of the elastic membrane (9); the lower end surface of the elastic membrane (9) is tightly contacted with the upper end surface of the supporting cover (10); an annular groove is formed in the upper end face of the supporting cover (10), and the inner surface of the annular groove of the supporting cover (10) is in clearance fit with the inner surface of the shell (3) and is sealed through a sealing ring; the bottom surface of the annular groove of the supporting cover (10) is contacted with the lower end surface of the shell (3); the supporting cover (10) is fixedly connected with the shell (3) through screws; the lower end surface of the supporting cover (10) is provided with a circular through hole; the outer surface of the lower end of the connecting shaft (12) is in clearance fit with the inner surface of the circular through hole of the lower end surface of the supporting cover (10), and is locked and fixed through the sealing gasket (11) and the locking nut (13); one end of the baffle plate (19) is contacted with the outer surface of the shell (3); the baffle (19) is provided with a circular through hole in clearance fit with the outer surface of the magnetic core rod (17); one end of the magnetic core bar (17) is provided with threads; a threaded hole is formed in the center of the fixing plate (15), and the fixing plate (15) is fixedly connected with the magnetic core rod (17) through threads; the exciting coil (18) is wound in a groove between the fixed plate (15) and the baffle plate (19); the outer surfaces of the fixed plate (15), the exciting coil (18) and the baffle plate (19) are respectively in close contact with the groove surfaces of the coil upper end cover (7) and the coil lower end cover (14); the inner surface of the outer magnetic yoke (16) is tightly contacted with one end of the magnetic core bar (17), and the outer surface of the outer magnetic yoke (16) is tightly contacted with the inner surface of the groove of the coil lower end cover (14); the upper end face of the coil upper end cover (7) is tightly contacted with the lower end face of the protruding end of the shell (3); the coil upper end cover (7) is fixedly connected with the coil lower end cover (14) through bolts; the lower end face of the coil lower end cover (14) is tightly contacted with the upper end face of the supporting cover (10); the elastic shell (2), the shell (3), the magnetic core end cover (4) and the magnetic core (5) are enclosed to form a closed cavity I; the magnetic core (5), the annular base plate (8) and the elastic membrane (9) are enclosed to form a closed containing cavity II; a closed containing cavity III is enclosed between the elastic membrane (9) and the supporting cover (10); the closed accommodating cavity I and the closed accommodating cavity II are filled with magnetorheological fluid; the closed cavity III is filled with nitrogen; when the magnetic core is vibrated externally, the elastic shell (2) is subjected to pressure deformation, the pressure of the closed containing cavity I is larger than that of the closed containing cavity II, and the magnetorheological fluid is caused to enter the closed containing cavity II from the closed containing cavity I through the first circular through hole (26) of the magnetic core end cover (4), the second circular through hole (27) of the annular sleeve (6) and the third circular through hole (22) of the magnetic core (5) in sequence; when external pressure is removed, magnetorheological fluid sequentially passes through the third circular through hole (22) of the magnetic core (5), the second circular through hole (27) of the annular sleeve (6) and the first circular through hole (26) of the magnetic core end cover (4) from the closed containing cavity II to enter the closed containing cavity I; the magnetic force lines generated by the exciting coil (18) sequentially pass through the magnetic core (5), the annular sleeve (6) and a second circular through hole (27) on the annular sleeve (6) along the inner part of the magnetic core rod (17), then enter the inner part of the adjacent magnetic core rod (17) through the annular sleeve (6) and the magnetic core (5), and finally enter the inner part of the magnetic core rod (17) along the outer magnetic yoke (16) to form a closed loop; the shell (3), the magnetic core end cover (4), the coil upper end cover (7), the coil lower end cover (14), the fixing plate (15) and the baffle plate (19) are made of non-magnetic conductive materials; the magnetic core (5), the annular sleeve (6), the outer magnetic yoke (16) and the magnetic core rod (17) are made of magnetic conductive materials.
Compared with the background technology, the invention has the following beneficial effects:
(1) The magnetorheological vibration absorber is internally provided with a magnetic core, 6 magnetic core rods are uniformly arranged on the periphery of the outer surface of the magnetic core, and an excitation coil and an external magnetic yoke are arranged at the other end of each magnetic core rod; an annular sleeve is arranged in the end face groove of the magnetic core. The magnetic core end cover, the annular sleeve and 6 circular through holes on the bottom surface of the magnetic core annular groove are mutually aligned to form a liquid flow channel of magnetorheological fluid together. When the external vibration occurs, the elastic shell is deformed by pressure, so that the pressure of the closed cavity I is larger than that of the closed cavity II, and magnetorheological fluid in the closed cavity I is caused to enter the closed cavity II through the liquid flow channel; at the moment, current is introduced into the exciting coil to generate a magnetic field, and under the action of the magnetic field, the magnetorheological fluid at the liquid flow channel generates a controllable damping force to counteract impact generated by external vibration. The magnetorheological vibration absorber has the characteristics of compact structure, wide working frequency range and continuous and controllable performance.
(2) The exciting coils adopted by the invention are uniformly distributed in the circumferential direction, and most of the components are in a static state, so that the exciting coils can be used in a limited space range.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic diagram of the magnetic field lines of the present invention.
FIG. 3 is a schematic flow diagram of a magnetorheological fluid in accordance with the present invention.
Fig. 4 is a schematic diagram of a magnetic core structure according to the present invention.
Fig. 5 is a schematic diagram of a magnetic core end cap structure according to the present invention.
FIG. 6 is a schematic view of the annular sleeve structure of the present invention.
Description of the embodiments
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic diagram of the structure of the present invention. Mainly including backup pad (1), elastic shell (2), casing (3), magnetic core end cover (4), magnetic core (5), annular sleeve (6), coil upper end cover (7), annular backing plate (8), elastic membrane (9), supporting cover (10), sealing gasket (11), connecting axle (12), lock nut (13), coil lower extreme cover (14), fixed plate (15), outside yoke (16), magnetic core pole (17), exciting coil (18), baffle (19) and fastening gasket (20).
Fig. 2 is a schematic diagram of the magnetic field lines of the present invention. The magnetic force lines generated by the exciting coil (18) sequentially pass through the magnetic core (5), the annular sleeve (6) and the first circular through hole (26) on the annular sleeve (6) along the inner part of the magnetic core rod (17), then enter the inner part of the adjacent magnetic core rod (17) through the annular sleeve (6) and the magnetic core (5), and finally enter the inner part of the magnetic core rod (17) along the outer magnetic yoke (16) to form a closed loop.
FIG. 3 is a schematic flow diagram of a magnetorheological fluid in accordance with the present invention. The elastic shell (2), the shell (3), the magnetic core end cover (4) and the magnetic core (5) are enclosed to form a closed cavity I; the magnetic core (5), the annular base plate (8) and the elastic membrane (9) are enclosed to form a closed containing cavity II; a closed containing cavity III is enclosed between the elastic membrane (9) and the supporting cover (10); the closed accommodating cavity I and the closed accommodating cavity II are filled with magnetorheological fluid; the enclosed cavity III is filled with nitrogen. When the magnetic core is vibrated externally, the elastic shell (2) is subjected to pressure deformation, the pressure of the closed containing cavity I is larger than that of the closed containing cavity II, and the magnetorheological fluid is caused to enter the closed containing cavity II from the closed containing cavity I through the first circular through hole (26) of the magnetic core end cover (4), the second circular through hole (27) of the annular sleeve (6) and the third circular through hole (22) of the magnetic core (5) in sequence; when external pressure is removed, magnetorheological fluid sequentially passes through the third circular through hole (22) of the magnetic core (5), the second circular through hole (27) of the annular sleeve (6) and the first circular through hole (26) of the magnetic core end cover (4) from the closed containing cavity II to enter the closed containing cavity I.
Fig. 4 is a schematic diagram of a magnetic core structure according to the present invention. The upper end surface of the magnetic core (5) is provided with a second annular groove (21) which is connected with the annular sleeve (6); the end face of the magnetic core (5) is provided with a second annular groove (21), and 6 third circular through holes (22) are uniformly formed in the circumferential direction of the bottom surface of the second annular groove (21) and are used as one of channels of magnetorheological fluid; 6 fourth round through holes (24) are uniformly formed in the circumferential direction of the outer surface of the magnetic core (5) and are in clearance fit with the outer surface of the magnetic core rod (17); a threaded hole (23) is formed in the middle of the upper end face of the magnetic core (5), and is fixedly connected with a screw through threads.
FIG. 5 is a schematic diagram of a core cap according to the present invention. The end face of the magnetic core end cover (4) is provided with a first annular groove (25) which is connected with the annular sleeve (6); 6 first round through holes (26) are uniformly formed in the circumferential direction of the end face of the magnetic core end cover (4) and serve as one of channels of magnetorheological fluid.
FIG. 6 is a schematic view of the annular sleeve structure of the present invention. The end face of the annular sleeve (6) is uniformly provided with 6 second circular through holes (27) in the circumferential direction, and the second circular through holes are respectively aligned with the 6 first circular through holes (26) on the end face of the magnetic core end cover (4) and the 6 third circular through holes (22) on the bottom face of the second annular groove (21) of the magnetic core (5) to form a flow channel of magnetorheological fluid together.
The working principle of the invention is as follows:
a magnetic core (5) is arranged in the magnetorheological vibration absorber, 6 magnetic core rods (17) are uniformly arranged on the circumferential direction of the outer surface of the magnetic core (5), and an excitation coil (18) and an external magnetic yoke (16) are arranged at the other end of the magnetic core rod (17); an annular sleeve (6) is arranged in the end face groove of the magnetic core (5), and the annular sleeve (6) has higher magnetic conductivity. When the magnetic core is vibrated externally, the elastic shell (2) is subjected to pressure deformation, the pressure of the closed containing cavity I is larger than that of the closed containing cavity II, and the magnetorheological fluid is caused to enter the closed containing cavity II from the closed containing cavity I through the first circular through hole (26) of the magnetic core end cover (4), the second circular through hole (27) of the annular sleeve (6) and the third circular through hole (22) of the magnetic core (5) in sequence; at the moment, current is supplied to the exciting coil (18) to generate a magnetic field, under the action of the magnetic field, magnetorheological effect is generated through magnetorheological fluid at the liquid flow channel, and controllable damping force is generated, so that impact generated by external vibration is counteracted, and the vibration absorption effect is realized.
Claims (1)
1. A magnetorheological vibration absorber employing a plurality of excitation coils radially disposed, comprising: the magnetic core comprises a supporting plate (1), an elastic shell (2), a shell (3), a magnetic core end cover (4), a magnetic core (5), an annular sleeve (6), a coil upper end cover (7), an annular base plate (8), an elastic membrane (9), a supporting cover (10), a sealing gasket (11), a connecting shaft (12), a locking nut (13), a coil lower end cover (14), a fixing plate (15), an external magnetic yoke (16), a magnetic core rod (17), an exciting coil (18), a baffle plate (19) and a fastening gasket (20); rectangular patterns are processed at the lower end of the supporting plate (1), and grooves are processed in the elastic shell (2); the supporting plate (1) is fixedly connected with the elastic shell (2) through embedding; the elastic shell (2) is fastened and connected with the shell (3) through screws and fastening gaskets (20); a circular through hole is processed in the center of the upper end face of the shell (3); a circular groove is processed on the lower end surface of the shell (3); the bottom surface of the circular groove of the shell (3) is tightly contacted with the upper end surface of the magnetic core (5); the inner surface of the circular groove of the shell (3) is in clearance fit with the outer surface of the magnetic core (5), and is sealed by a sealing ring; 6 circular through holes are uniformly formed in the circumferential direction of the outer surface of the shell (3), and the 6 circular through holes are respectively in interference fit with the circumferential outer surfaces of the 6 magnetic core rods (17); the lower end face of the magnetic core end cover (4) is provided with a first annular groove (25), and the bottom face of the first annular groove (25) is tightly contacted with the upper end face of the annular sleeve (6); the end face of the magnetic core end cover (4) is provided with 6 first circular through holes (26) which are uniformly distributed, and the end face of the annular sleeve (6) is provided with 6 second circular through holes (27) which are uniformly distributed; the end face of the magnetic core (5) is provided with a second annular groove (21), and the bottom surface of the second annular groove (21) is tightly contacted with the lower end face of the annular sleeve (6); the bottom surface of the second annular groove (21) of the magnetic core (5) is provided with 6 third circular through holes (22) which are uniformly distributed; the first circular through hole (26), the second circular through hole (27) and the third circular through hole (22) are mutually aligned along the axial direction and form a liquid flow channel of magnetorheological fluid together; the magnetic core end cover (4) is fixedly connected with the magnetic core (5) through a screw; 6 circular holes (24) are uniformly formed in the circumferential direction on the outer surface of the magnetic core (5), and are respectively in close contact with the outer surfaces of one ends of the 6 magnetic core rods (17); the lower end surface of the magnetic core (5) is tightly contacted with the upper end surface of the annular base plate (8); the lower end surface of the annular base plate (8) is tightly contacted with the upper end surface of the elastic membrane (9); the lower end surface of the elastic membrane (9) is tightly contacted with the upper end surface of the supporting cover (10); an annular groove is formed in the upper end face of the supporting cover (10), and the inner surface of the annular groove of the supporting cover (10) is in clearance fit with the inner surface of the shell (3) and is sealed through a sealing ring; the bottom surface of the annular groove of the supporting cover (10) is contacted with the lower end surface of the shell (3); the supporting cover (10) is fixedly connected with the shell (3) through screws; the lower end surface of the supporting cover (10) is provided with a circular through hole; the outer surface of the lower end of the connecting shaft (12) is in clearance fit with the inner surface of the circular through hole of the lower end surface of the supporting cover (10), and is locked and fixed through the sealing gasket (11) and the locking nut (13); one end of the baffle plate (19) is contacted with the outer surface of the shell (3); the baffle (19) is provided with a circular through hole in clearance fit with the outer surface of the magnetic core rod (17); one end of the magnetic core bar (17) is provided with threads; a threaded hole is formed in the center of the fixing plate (15), and the fixing plate (15) is fixedly connected with the magnetic core rod (17) through threads; the exciting coil (18) is wound in a groove between the fixed plate (15) and the baffle plate (19); the outer surfaces of the fixed plate (15), the exciting coil (18) and the baffle plate (19) are respectively in close contact with the groove surfaces of the coil upper end cover (7) and the coil lower end cover (14); the inner surface of the outer magnetic yoke (16) is tightly contacted with one end of the magnetic core bar (17), and the outer surface of the outer magnetic yoke (16) is tightly contacted with the inner surface of the groove of the coil lower end cover (14); the upper end face of the coil upper end cover (7) is tightly contacted with the lower end face of the protruding end of the shell (3); the coil upper end cover (7) is fixedly connected with the coil lower end cover (14) through bolts; the lower end face of the coil lower end cover (14) is tightly contacted with the upper end face of the supporting cover (10);
the elastic shell (2), the shell (3), the magnetic core end cover (4) and the magnetic core (5) are enclosed to form a closed cavity I; the magnetic core (5), the annular base plate (8) and the elastic membrane (9) are enclosed to form a closed containing cavity II; a closed containing cavity III is enclosed between the elastic membrane (9) and the supporting cover (10);
the closed accommodating cavity I and the closed accommodating cavity II are filled with magnetorheological fluid; the closed cavity III is filled with nitrogen; when the magnetic core is vibrated externally, the elastic shell (2) is subjected to pressure deformation, the pressure of the closed containing cavity I is larger than that of the closed containing cavity II, and the magnetorheological fluid is caused to enter the closed containing cavity II from the closed containing cavity I through the first circular through hole (26) of the magnetic core end cover (4), the second circular through hole (27) of the annular sleeve (6) and the third circular through hole (22) of the magnetic core (5) in sequence; when external pressure is removed, magnetorheological fluid sequentially passes through the third circular through hole (22) of the magnetic core (5), the second circular through hole (27) of the annular sleeve (6) and the first circular through hole (26) of the magnetic core end cover (4) from the closed containing cavity II to enter the closed containing cavity I;
the magnetic force lines generated by the exciting coil (18) sequentially pass through the magnetic core (5), the annular sleeve (6) and a second circular through hole (27) on the annular sleeve (6) along the inner part of the magnetic core rod (17), then enter the inner part of the adjacent magnetic core rod (17) through the annular sleeve (6) and the magnetic core (5), and finally enter the inner part of the magnetic core rod (17) along the outer magnetic yoke (16) to form a closed loop;
the shell (3), the magnetic core end cover (4), the coil upper end cover (7), the coil lower end cover (14), the fixing plate (15) and the baffle plate (19) are made of non-magnetic conductive materials; the magnetic core (5), the annular sleeve (6), the outer magnetic yoke (16) and the magnetic core rod (17) are made of magnetic conductive materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810100221.4A CN108071731B (en) | 2018-02-01 | 2018-02-01 | Magnetorheological vibration absorber adopting radial arrangement of multiple exciting coils |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810100221.4A CN108071731B (en) | 2018-02-01 | 2018-02-01 | Magnetorheological vibration absorber adopting radial arrangement of multiple exciting coils |
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| Publication Number | Publication Date |
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| CN108071731A CN108071731A (en) | 2018-05-25 |
| CN108071731B true CN108071731B (en) | 2024-03-01 |
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| CN108869611B (en) * | 2018-07-22 | 2020-08-11 | 重庆交通大学 | Passenger car engine multi-mode magneto-rheological vibration isolator |
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| JP2004301333A (en) * | 2004-06-01 | 2004-10-28 | Toyo Tire & Rubber Co Ltd | Liquid sealing type vibration absorption device |
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| CN108071731A (en) | 2018-05-25 |
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