CN109236936B - Magnetorheological damper sealed by elastic metal corrugated pipe - Google Patents
Magnetorheological damper sealed by elastic metal corrugated pipe Download PDFInfo
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- CN109236936B CN109236936B CN201811335700.0A CN201811335700A CN109236936B CN 109236936 B CN109236936 B CN 109236936B CN 201811335700 A CN201811335700 A CN 201811335700A CN 109236936 B CN109236936 B CN 109236936B
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- Prior art keywords
- end cover
- corrugated pipe
- damping
- winding frame
- valve sleeve
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- 239000002184 metal Substances 0.000 title claims abstract description 18
- 238000013016 damping Methods 0.000 claims abstract description 123
- 238000004804 winding Methods 0.000 claims abstract description 58
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 21
- 230000007704 transition Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000696 magnetic material Substances 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000725 suspension Substances 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
- F16F9/32—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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/361—Sealings of the bellows-type
Abstract
The invention discloses a magnetorheological damper sealed by adopting an elastic metal corrugated pipe, which mainly comprises an end cover, a corrugated pipe, a valve sleeve, a winding bracket, an excitation coil, a damping disk, a stop shaft, a guide shaft and the like. The valve sleeve, the winding frame, the exciting coil and the damping disk form a magneto-rheological valve structure with a mixed flow type liquid flow channel, 4 sections of effective damping gaps connected in series are formed under the action of current, the liquid flow damping length is effectively increased, and the utilization rate of magnetic force lines is improved. The left end cover and the right end cover are fixedly connected through 4 guide shafts and driven by the guide shafts to move left and right along the guide holes on the valve sleeve. The elastic metal bellows is adopted between the end covers for static sealing, so that dynamic sealing friction of the damper is eliminated, and the adjustable range of damping force is effectively improved. The magnetorheological damper has wide damping force adjustable range, can effectively isolate high-frequency vibration by adopting the corrugated pipe for elastic connection, and is particularly suitable for vibration reduction systems in the traffic industry.
Description
Technical Field
The invention relates to a magnetorheological damper, in particular to a magnetorheological damper sealed by an elastic metal corrugated pipe.
Background
The magneto-rheological damper is a novel intelligent damping device widely applied to semi-active control systems. The method mainly applies a certain current to an exciting coil on a winding frame in the damper to generate a magnetic field so as to change the yield strength of magnetorheological fluid flowing through a liquid flow channel, thereby dynamically changing the output damping force. The magneto-rheological damper has the characteristics of millisecond response speed, large control range and large damping force output, so that the magneto-rheological damper becomes a semi-active executing device with excellent industrial application field. Currently, magneto-rheological dampers are widely applied to vibration reduction and shock resistance systems of buildings and bridges, vibration reduction of railway rolling stock and automobile suspension systems and the like.
Most of the liquid flow damping channels of the currently designed magneto-rheological damper are of a single circular flow or radial flow structure, and all the liquid flow damping channels adopt a dynamic sealing structure consisting of a piston and a cylinder body. When the magnetorheological damper works, the magnitude of the loading current is changed, and the magnetic induction intensity in the damping gap can be adjusted, so that the damping force of the magnetorheological damper is adjusted. When the magnetic induction intensity in the damping gap reaches saturation, the output damping force of the damper also reaches the maximum. To increase the maximum damping force and the damping force adjustable range of the damper is generally achieved by decreasing the damping gap thickness or increasing the effective damping gap length. Reducing the thickness of the damping gap is easy to cause blockage of a liquid flow channel due to sedimentation of magnetorheological fluid, so that the magnetorheological damper is invalid when working; increasing the effective damping gap length increases the external volume and size of the magnetorheological damper, occupies more installation space and use space, and correspondingly increases the manufacturing cost. In addition, the adoption of a dynamic seal structure consisting of a piston and a cylinder body limits the adjustable range of damping force, because the piston head and the cylinder body and the piston rod and the end cover are dynamically sealed by using sealing rings, so that large sealing friction is generated when the damper works, and the friction force is a part of uncontrollable damping force.
Disclosure of Invention
In order to overcome the problems in the background art and meet the requirements of the magnetorheological damper in engineering application, the invention provides the magnetorheological damper sealed by adopting the elastic metal corrugated pipe. The clearance between the winding frame and the damping disk of the magneto-rheological damper forms a liquid flow damping channel with circular flow and radial flow, and can form two sections of circular axial effective damping clearances and two sections of disk-shaped radial effective damping clearances. On the premise of not increasing the external dimension, the valve sleeve, the winding frame, the exciting coil and the damping disk of the damper form a magneto-rheological valve structure with a mixed flow type liquid flow channel. The effective damping gap of 4 sections of series connection is formed under the action of current in the exciting coil, so that the liquid flow damping length is effectively increased, and the utilization rate of magnetic force lines is improved. Unlike traditional magneto-rheological damper comprising piston and cylinder, the damper of the present invention has left and right end caps connected via 4 guide shafts and driven by the guide shafts to move left and right along the guide holes in the valve sleeve. The elastic metal bellows is adopted between the end covers for static sealing, so that dynamic sealing friction of the damper is eliminated, and the adjustable range of damping force is effectively improved. The magnetorheological damper has a wide damping force adjustable range, can effectively isolate high-frequency vibration by adopting the corrugated pipe for elastic connection, and is particularly suitable for a vibration reduction system in the traffic industry.
The technical scheme adopted by the invention for solving the technical problems comprises the following steps: the device comprises a left lifting lug (1), a flange I (2), a left corrugated pipe (3), a flange II (4), a winding frame (5), an exciting coil (6), a flange III (7), a right corrugated pipe (8), a flange IV (9), a right lifting lug (10), a right end cover (11), a guide shaft (12), a right stop shaft (13), a right connecting end cover (14), a right damping disc (15), a valve sleeve (16), a left damping disc (17), a left connecting end cover (18), a left stop shaft (19) and a left end cover (20); the right end of the left lifting lug (1) is provided with an external thread, the middle of the left end cover (20) is provided with an internal thread through hole, and the left end cover are fixedly connected through threads; the left end cover (20) is provided with 4 circular through holes which are uniformly distributed along the circumferential direction and correspond to the internal threaded holes of the left end face of the 4 guide shafts (12); the left end cover (20) is fixedly connected with the left end faces of the 4 guide shafts (12) which are uniformly arranged along the circumferential direction through screws; the flange plate I (2) is fixedly connected with the left end cover (20) through screws; the left end face of the left corrugated pipe (3) is tightly attached to the right end face of the left end cover (20) and is tightly pressed through the flange plate I (2); the left corrugated pipe (3) and the left end cover (20) are sealed by a sealing ring; the left connecting end cover (18) is in transition fit with the inner surface of the valve sleeve (16) and is sealed by a sealing ring; the left connecting end cover (18), the flange plate II (4) and the valve sleeve (16) are fixedly connected through screws; the right end face of the left corrugated pipe (3) is tightly attached to the left end face of the left connecting end cover (18) and is tightly pressed through a flange plate II (4); the left corrugated pipe (3) is sealed with the left connecting end cover (18) through a sealing ring; the right end of the left stop shaft (19) is provided with external threads, the middle of the left connecting end cover (18) is provided with an internal thread through hole, and the left connecting end cover are connected through screw fastening; the right end face of the left connecting end cover (18) is tightly attached to the left end faces of the left damping disc (17) and the winding frame (5), and plays an axial positioning role on the left sides of the left damping disc (17) and the winding frame (5); the radial circumferential surface of the left damping disk (17) is provided with 4 circular bulges which are uniformly distributed in the circumferential direction, and the 4 circular bulges are in transition fit with the circumferential inner surface of the winding frame (5); the winding frame (5) is in clearance fit with the inner surface of the valve sleeve (16) and is sealed by a sealing ring; the middle part of the winding frame (5) is processed into a stepped hole, and a surface (501), a surface (502) and a diversion hole (503) are formed in the stepped hole; the surface (501) of the winding frame (5) is attached to 4 small cylindrical bosses which are uniformly arranged in the circumferential direction and are processed on the right end surface of the left damping disk (17), and the winding frame (5) axially positions the right side of the left damping disk (17) through the surface (501); the surface (502) of the winding frame (5) is attached to 4 small cylindrical bosses which are uniformly arranged in the circumferential direction and are processed on the left end surface of the right damping disk (15), and the winding frame (5) axially positions the left side of the right damping disk (15) through the surface (502); the exciting coil (6) is wound in a winding groove (504) of the winding frame (5), and a lead wire of the exciting coil is led out from a lead wire hole (1601) of the valve sleeve (16); the radial circumferential surface of the right damping disk (15) is provided with 4 circular bulges which are uniformly distributed in the circumferential direction, and the 4 circular bulges are in transition fit with the circumferential inner surface of the winding frame (5); the left end face of the right connecting end cover (14) is tightly attached to the right damping disc (15) and the right end face of the winding frame (5), and plays an axial positioning role on the right sides of the right damping disc (15) and the winding frame (5); the left end of the right stop shaft (13) is provided with external threads, the middle of the right connecting end cover (14) is provided with an internal thread through hole, and the two are fixedly connected through threads; the right connecting end cover (14) is in transition fit with the inner surface of the valve sleeve (16) and is sealed by a sealing ring; the right connecting end cover (14), the flange plate III (7) and the valve sleeve (16) are fixedly connected through screws; the left end face of the right corrugated pipe (8) is tightly attached to the right end face of the right connecting end cover (14) and is tightly pressed through a flange III (7); the right corrugated pipe (8) and the right connecting end cover (14) are sealed by a sealing ring; the flange IV (9) is fixedly connected with the right end cover (11) through screws; the right end face of the right corrugated pipe (8) is tightly attached to the left end face of the right end cover (11) and is tightly pressed by the flange IV (9); the right corrugated pipe (8) and the right end cover (11) are sealed by a sealing ring; the left end of the right lifting lug (10) is provided with an external thread, the middle of the right end cover (11) is provided with an internal thread through hole, and the two are tightly connected through threads; the right end cover (11) is provided with 4 circular through holes which are uniformly distributed along the circumferential direction and respectively correspond to the internal threaded holes of the right end surfaces of the 4 guide shafts (12); the right end cover (11) is fixedly connected with the right end faces of the 4 guide shafts (12) which are uniformly arranged along the circumferential direction through screws; the 4 guide shafts (12) are respectively in clearance fit with 4 guide holes which are uniformly arranged in the circumferential direction on the valve sleeve (16); the 4 guide shafts (12) can move left and right along the axial direction of the guide holes on the valve sleeve (16) and can drive the left end cover (20) and the right end cover (11) to move left and right along the axial direction; the left end cover (20), the left corrugated pipe (3), the left stop shaft (19) and the left connecting end cover (18) are enclosed to form a closed containing cavity A; a closed cavity B is formed by enclosing the right connecting end cover (14), the right stop shaft (13), the right corrugated pipe (8) and the right end cover (11); the airtight cavity A and the airtight cavity B are respectively filled with magnetorheological fluid; the left corrugated pipe (3) and the right corrugated pipe (8) are made of elastic metal corrugated pipes with the same specification parameters; when the damper stretches or compresses, the volumes of the left corrugated pipe (3) and the right corrugated pipe (8) change, so that the volumes of the closed cavity A and the closed cavity B are changed; the lengths of the left stop shaft (19) and the right stop shaft (13) are equal to each other and smaller than the lengths of the left corrugated pipe (3) and the right corrugated pipe (8), so that the left corrugated pipe (3) and the right corrugated pipe (8) can be limited to be excessively stretched or compressed; the annular axial gap between the left damping disc (17) and the winding frame (5) forms an effective damping gap of the first section; a disc-shaped radial gap between the left damping disc (17) and the winding frame (5) forms a second section effective damping gap; a disc-shaped radial gap between the right damping disc (15) and the winding frame (5) forms a third section effective damping gap; the annular axial gap between the right damping disc (15) and the winding frame (5) forms an IV-section effective damping gap; the effective damping gaps of the first section, the second section, the third section and the fourth section are sequentially connected to form a mixed flow type liquid flow channel structure; the winding frame (5), the right damping disc (15), the valve sleeve (16) and the left damping disc (17) are respectively made of low-carbon steel magnetic conduction materials; the rest parts are made of non-magnetic materials.
Compared with the background technology, the invention has the following beneficial effects:
(1) The invention adopts the elastic metal bellows type structure, the volume of the elastic metal bellows can change along with the change of the liquid flow pressure in the elastic metal bellows, and the structure changes the rigid connection of the damper into the elastic connection, so that the damper has good shock insulation performance under the condition of high-speed small-stroke movement, greatly reduces the transmission of high-frequency vibration, improves the use comfort, and is particularly suitable for vibration reduction systems in the industries of railways, traffic and the like.
(2) Compared with the traditional magnetorheological damper formed by dynamic sealing between a piston and a cylinder body, the invention adopts the metal bellows to manufacture the friction-free unit, and seals the friction-free unit through static sealing, and the high friction generated by dynamic sealing between a piston rod, an end cover and the piston head and the cylinder body is avoided, so that the damping force related to a magnetic field accounts for a larger proportion of the total output damping force, and the magnetorheological damper has a wider damping force adjustable range.
(3) The damping gap of the magnetorheological damper is designed to be a mixed flow type liquid flow channel with circular flow and radial flow, 4 sections of effective damping gaps are uniformly distributed at the middle position of the exciting coil, the flow direction of magnetorheological fluid in each section of damping gap is perpendicular to the magnetic field direction, the trend of magnetic force lines is fully utilized in the radial and axial directions, the length of the damping gap is increased, and the magnetic induction intensity in the damping gap is not reduced, so that the adjustable range of the damping force of the magnetorheological damper is wider, and the performance is better.
(4) The parts used by the magnetorheological damper are made of non-magnetic materials except the winding frame, the right damping disk, the valve sleeve and the left damping disk which are made of the low-carbon steel magnetic materials. The design can effectively ensure that magnetic lines of force are distributed in 4 sections of effective damping gaps as intensively as possible, fully exert the effect of a vertical magnetic field on magnetorheological fluid, improve the efficiency of the magnetorheological damper and effectively reduce the energy consumption of the magnetorheological damper.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a cross-sectional view of the left end cap of the present invention.
Fig. 3 is a right side view of the left end cap of the present invention.
Fig. 4 is a cross-sectional view of the left connecting end cap of the present invention.
Fig. 5 is a left side view of the left connecting end cap of the present invention.
Fig. 6 is a cross-sectional view of the valve sleeve of the present invention.
Fig. 7 is a left side view of the valve sleeve of the present invention.
FIG. 8 is a cross-sectional view of the left damping disk of the present invention.
Fig. 9 is a right side view of the left damping disk of the present invention.
Fig. 10 is a cross-sectional view of a bobbin of the present invention.
FIG. 11 is a schematic diagram of the flow of magnetorheological fluid through a fluid passageway in a rightward compression in accordance with the present invention.
Fig. 12 is a distribution diagram of magnetic lines of force when the present invention is energized.
Detailed Description
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. The device mainly comprises a left lifting lug 1, a flange I2, a left corrugated pipe 3, a flange II 4, a winding frame 5, an exciting coil 6, a flange III 7, a right corrugated pipe 8, a flange IV 9, a right lifting lug 10, a right end cover 11, a guide shaft 12, a right stop shaft 13, a right connecting end cover 14, a right damping disk 15, a valve sleeve 16, a left damping disk 17, a left connecting end cover 18, a left stop shaft 19 and a left end cover 20.
Fig. 2 shows a cross-sectional view of the left end cap of the present invention, and fig. 3 shows a right side view of the left end cap of the present invention. An internal thread through hole is formed in the center of the left end cover 20 and can be in threaded connection with the right end of the left lifting lug 1; the outer ring of the right end face of the left end cover 20 is provided with 4 circular through holes which are uniformly distributed along the circumferential direction and respectively correspond to threaded holes of the left end face of the 4 guide shafts 12, and the guide shafts 12 can be fixedly connected through screws; the inner ring of the right end face of the left end cover 20 is provided with 6 internal thread through holes which are uniformly distributed along the circumferential direction, and the internal thread through holes correspond to the 6 circular through holes on the flange I2, and can play a role in fastening connection with the flange I2 through screws; the right end face of the left end cover 20 is provided with an annular groove, and the left end of the left corrugated pipe 3 is arranged in the annular groove and is tightly pressed through a flange plate I2.
Fig. 4 is a cross-sectional view of the left connecting end cap of the present invention, and fig. 5 is a left side view of the left connecting end cap of the present invention. An internal thread through hole is formed in the center of the left connecting end cover 18 and can be in threaded connection with the right end of the left stop shaft 19; the left end face of the left connecting end cover 18 is provided with 6 circular through holes which are uniformly distributed along the circumferential direction, and the left connecting end cover 18, the flange II 4 and the valve sleeve 16 are fixedly connected through screws respectively corresponding to the 6 circular through holes on the flange II 4 and the 6 threaded holes on the left end face of the valve sleeve 16; the left end face of the left connecting end cover 18 is provided with an annular groove, and the right end of the left corrugated pipe 3 is arranged in the annular groove and is pressed by a flange II 4; the left end face of the left connecting end cover 18 is provided with 4 kidney-shaped holes which are uniformly distributed along the circumferential direction, so as to play a role in diversion.
Fig. 6 shows a cross-sectional view of the valve sleeve of the present invention and fig. 7 shows a left side view of the valve sleeve of the present invention. The left end face of the valve sleeve 16 is provided with 6 internal threaded holes which are uniformly distributed along the circumferential direction and correspond to 6 circular through holes on the left connecting end cover 18; the right end face of the valve sleeve 16 is provided with 6 internal threaded holes which are uniformly distributed along the circumferential direction and correspond to 6 circular through holes on the right connecting end cover 14; a lead hole 1601 is formed in the valve sleeve 16, and a lead wire of the exciting coil 6 can lead out of the damper from the lead hole 1601; the middle mounting seat of the valve sleeve 16 is provided with 4 guide holes which are uniformly distributed along the circumferential direction, and the guide shaft 12 is in clearance fit with the guide holes and can move left and right along the guide holes.
Fig. 8 is a cross-sectional view of the left damping disk of the present invention, and fig. 9 is a right side view of the left damping disk of the present invention. The radial circumferential surface of the left damping disk 17 is provided with 4 circular bulges which are uniformly distributed in the circumferential direction, and the 4 circular bulges can be in transition fit with the inner surface of the winding frame 5; the right end face of the left damping disk 17 is provided with 4 small cylindrical bosses which are uniformly distributed in the circumferential direction.
Fig. 10 shows a cross-sectional view of the bobbin of the present invention. The middle part of the winding frame 5 is processed into a stepped hole, and a surface 501, a surface 502 and a diversion hole 503 are formed in the stepped hole. The surface 501 has an axial positioning function on the right side of the left damping disk 17, the surface 502 has an axial positioning function on the left side of the right damping disk 15, and the diversion holes 503 have a diversion function. The bobbin 5 is formed with a winding groove 504, and the exciting coil 6 is wound in the winding groove 504 of the bobbin 5, and its lead wire is led out of the damper through the lead wire hole 1601 of the valve housing 16.
FIG. 11 is a schematic diagram of the flow of magnetorheological fluid through a fluid passageway in a rightward compression in accordance with the present invention. When the left end cover 20, the guide shaft 12 and the right end cover 11 move rightward, the direction indicated by the arrow is the flowing direction of the magnetorheological fluid from the damper accommodating cavity a to the damper accommodating cavity B.
Fig. 12 shows the distribution of magnetic lines of force during the energizing operation of the present invention. The annular axial gap between the left damping disk 17 and the winding frame 5 forms an effective damping gap of the first section; the disc-shaped radial gap between the left damping disc 17 and the winding frame 5 forms a second section effective damping gap; the disc-shaped radial gap between the right damping disk 15 and the winding frame 5 forms a third section effective damping gap; the annular axial gap between the right damping disk 15 and the winding frame 5 forms an effective damping gap of the IV section; the effective damping gaps of the first section, the second section, the third section and the fourth section are sequentially connected to form a mixed flow type liquid flow channel structure. When a certain amount of current is introduced into the exciting coil 6, magnetic force lines generated by electromagnetic induction pass through the valve sleeve 16, the left side of the winding frame 5, the effective damping gap of the first section, the left damping disk 17 and the effective damping gap of the second section to reach the middle part of the winding frame 5, and then pass through the effective damping gap of the third section, the right damping disk 15 and the effective damping gap of the fourth section and the right side of the winding frame 5 to return to the valve sleeve 16, so that a closed loop is formed.
The working principle of the invention is as follows:
as shown in fig. 1, 11 and 12, the left end cover 20 and the right end cover 11 are fixedly connected through 4 guide shafts 12, and are driven by the guide shafts 12 to move left and right along the guide holes on the valve sleeve 16; the left corrugated pipe 3 and the right corrugated pipe 8 are adopted between the end covers for static sealing, so that dynamic sealing friction of the damper is eliminated, and the adjustable range of damping force is effectively improved. The left corrugated pipe 3 and the right corrugated pipe 8 are made of elastic metal corrugated pipes with the same specification parameters, the volume of the elastic metal corrugated pipes can change along with the pressure change of liquid flow in the damper, and the rigid connection of the damper is changed into elastic connection, so that the damper has good shock insulation performance under the condition of high-speed small-stroke movement, and the transmission of high-frequency vibration is greatly reduced. The valve sleeve 16, the spool 5, the exciting coil 6, the left damping disk 17 and the right damping disk 15 form a magneto-rheological valve structure with a mixed flow liquid flow channel. Under the action of current, magnetic fields are formed in the effective damping gaps of the first section, the second section, the third section and the fourth section, the direction of the magnetic fields is perpendicular to the flowing direction of magnetorheological fluid, at the moment, the viscosity of the magnetorheological fluid in the 4 sections of damping gaps is increased under the action of an external magnetic field, the magnetorheological fluid is quickly changed from a Newton fluid state to a semi-solid state or a solid state, the shear yield strength of the magnetorheological fluid is quickly increased and is changed along with the intensity of the external magnetic field, and chain resistance of the magnetorheological fluid must be overcome when the magnetorheological fluid flows through the 4 sections of damping gaps, so that the resistance of the magnetorheological fluid flowing through a valve is increased, the flowing of the fluid can be slowed down or prevented, and a four-stage pressure drop is generated, so that pressure difference is generated between a damper accommodating cavity A and a damper accommodating cavity B. The magnetic field intensity at the damping gap can be controlled by adjusting the current in the exciting coil 6 so as to control the shearing stress of the magnetorheological fluid, thereby realizing the adjustment of the output damping force of the damper.
Claims (3)
1. A magnetorheological damper sealed with an elastic metal bellows, comprising: the device comprises a left lifting lug (1), a flange I (2), a left corrugated pipe (3), a flange II (4), a winding frame (5), an exciting coil (6), a flange III (7), a right corrugated pipe (8), a flange IV (9), a right lifting lug (10), a right end cover (11), a guide shaft (12), a right stop shaft (13), a right connecting end cover (14), a right damping disc (15), a valve sleeve (16), a left damping disc (17), a left connecting end cover (18), a left stop shaft (19) and a left end cover (20); the right end of the left lifting lug (1) is provided with an external thread, the middle of the left end cover (20) is provided with an internal thread through hole, and the left end cover are fixedly connected through threads; the left end cover (20) is provided with 4 circular through holes which are uniformly distributed along the circumferential direction and correspond to the internal threaded holes of the left end face of the 4 guide shafts (12); the left end cover (20) is fixedly connected with the left end faces of the 4 guide shafts (12) which are uniformly arranged along the circumferential direction through screws; the flange plate I (2) is fixedly connected with the left end cover (20) through screws; the left end face of the left corrugated pipe (3) is tightly attached to the right end face of the left end cover (20) and is tightly pressed through the flange plate I (2); the left corrugated pipe (3) and the left end cover (20) are sealed by a sealing ring; the left connecting end cover (18) is in transition fit with the inner surface of the valve sleeve (16) and is sealed by a sealing ring; the left connecting end cover (18), the flange plate II (4) and the valve sleeve (16) are fixedly connected through screws; the right end face of the left corrugated pipe (3) is tightly attached to the left end face of the left connecting end cover (18) and is tightly pressed through a flange plate II (4); the left corrugated pipe (3) is sealed with the left connecting end cover (18) through a sealing ring; the right end of the left stop shaft (19) is provided with external threads, the middle of the left connecting end cover (18) is provided with an internal thread through hole, and the left connecting end cover are connected through screw fastening; the right end face of the left connecting end cover (18) is tightly attached to the left end faces of the left damping disc (17) and the winding frame (5), and plays an axial positioning role on the left sides of the left damping disc (17) and the winding frame (5); the radial circumferential surface of the left damping disk (17) is provided with 4 circular bulges which are uniformly distributed in the circumferential direction, and the 4 circular bulges are in transition fit with the circumferential inner surface of the winding frame (5); the winding frame (5) is in clearance fit with the inner surface of the valve sleeve (16) and is sealed by a sealing ring; the middle part of the winding frame (5) is processed into a stepped hole, and a surface (501), a surface (502) and a diversion hole (503) are formed in the stepped hole; the surface (501) of the winding frame (5) is attached to 4 small cylindrical bosses which are uniformly arranged in the circumferential direction and are processed on the right end surface of the left damping disk (17), and the winding frame (5) axially positions the right side of the left damping disk (17) through the surface (501); the surface (502) of the winding frame (5) is attached to 4 small cylindrical bosses which are uniformly arranged in the circumferential direction and are processed on the left end surface of the right damping disk (15), and the winding frame (5) axially positions the left side of the right damping disk (15) through the surface (502); the exciting coil (6) is wound in a winding groove (504) of the winding frame (5), and a lead wire of the exciting coil is led out from a lead wire hole (1601) of the valve sleeve (16); the radial circumferential surface of the right damping disk (15) is provided with 4 circular bulges which are uniformly distributed in the circumferential direction, and the 4 circular bulges are in transition fit with the circumferential inner surface of the winding frame (5); the left end face of the right connecting end cover (14) is tightly attached to the right damping disc (15) and the right end face of the winding frame (5), and plays an axial positioning role on the right sides of the right damping disc (15) and the winding frame (5); the left end of the right stop shaft (13) is provided with external threads, the middle of the right connecting end cover (14) is provided with an internal thread through hole, and the two are fixedly connected through threads; the right connecting end cover (14) is in transition fit with the inner surface of the valve sleeve (16) and is sealed by a sealing ring; the right connecting end cover (14), the flange plate III (7) and the valve sleeve (16) are fixedly connected through screws; the left end face of the right corrugated pipe (8) is tightly attached to the right end face of the right connecting end cover (14) and is tightly pressed through a flange III (7); the right corrugated pipe (8) and the right connecting end cover (14) are sealed by a sealing ring; the flange IV (9) is fixedly connected with the right end cover (11) through screws; the right end face of the right corrugated pipe (8) is tightly attached to the left end face of the right end cover (11) and is tightly pressed by the flange IV (9); the right corrugated pipe (8) and the right end cover (11) are sealed by a sealing ring; the left end of the right lifting lug (10) is provided with an external thread, the middle of the right end cover (11) is provided with an internal thread through hole, and the two are tightly connected through threads; the right end cover (11) is provided with 4 circular through holes which are uniformly distributed along the circumferential direction and respectively correspond to the internal threaded holes of the right end surfaces of the 4 guide shafts (12); the right end cover (11) is fixedly connected with the right end faces of the 4 guide shafts (12) which are uniformly arranged along the circumferential direction through screws; the 4 guide shafts (12) are respectively in clearance fit with 4 guide holes which are uniformly arranged in the circumferential direction on the valve sleeve (16); the 4 guide shafts (12) can move left and right along the axial direction of the guide holes on the valve sleeve (16) and can drive the left end cover (20) and the right end cover (11) to move left and right along the axial direction; the left end cover (20), the left corrugated pipe (3), the left stop shaft (19) and the left connecting end cover (18) are enclosed to form a closed containing cavity A; a closed cavity B is formed by enclosing the right connecting end cover (14), the right stop shaft (13), the right corrugated pipe (8) and the right end cover (11); the airtight cavity A and the airtight cavity B are respectively filled with magnetorheological fluid; the left corrugated pipe (3) and the right corrugated pipe (8) are made of elastic metal corrugated pipes with the same specification parameters; when the damper stretches or compresses, the volumes of the left corrugated pipe (3) and the right corrugated pipe (8) change, so that the volumes of the closed cavity A and the closed cavity B are changed; the lengths of the left stop shaft (19) and the right stop shaft (13) are equal to each other and smaller than the lengths of the left corrugated pipe (3) and the right corrugated pipe (8), so that the left corrugated pipe (3) and the right corrugated pipe (8) can be limited to be excessively stretched or compressed.
2. A magnetorheological damper sealed with an elastic metal bellows according to claim 1, wherein: the annular axial gap between the left damping disc (17) and the winding frame (5) forms an effective damping gap of the first section; a disc-shaped radial gap between the left damping disc (17) and the winding frame (5) forms a second section effective damping gap; a disc-shaped radial gap between the right damping disc (15) and the winding frame (5) forms a third section effective damping gap; the annular axial gap between the right damping disc (15) and the winding frame (5) forms an IV-section effective damping gap; the effective damping gaps of the first section, the second section, the third section and the fourth section are sequentially connected to form a mixed flow type liquid flow channel structure.
3. A magnetorheological damper sealed with an elastic metal bellows according to claim 1, wherein: the winding frame (5), the right damping disc (15), the valve sleeve (16) and the left damping disc (17) are respectively made of low-carbon steel magnetic conduction materials; the rest parts are made of non-magnetic materials.
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| CN110107640B (en) * | 2019-05-27 | 2024-02-09 | 江西科技学院 | Shock absorber device and control method thereof |
| CN114607722B (en) * | 2022-03-31 | 2024-04-02 | 长光卫星技术股份有限公司 | Semi-active vibration isolation platform for micro-vibration of optical remote sensing satellite and assembly method |
| CN116857313B (en) * | 2023-09-01 | 2023-11-14 | 中国科学院长春光学精密机械与物理研究所 | Damping-adjustable vibration-damping energy-consuming mechanism |
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