CN113187845A - Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof - Google Patents

Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof Download PDF

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Publication number
CN113187845A
CN113187845A CN202110612499.1A CN202110612499A CN113187845A CN 113187845 A CN113187845 A CN 113187845A CN 202110612499 A CN202110612499 A CN 202110612499A CN 113187845 A CN113187845 A CN 113187845A
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China
Prior art keywords
steering engine
magnetic
cylinder body
inertia block
rotation
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CN202110612499.1A
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Chinese (zh)
Inventor
欧阳青
胡红生
苏双双
彭道轩
唐彤彤
王鑫
何伟
孔高阳
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Jiaxing University
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Jiaxing University
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Publication of CN113187845A publication Critical patent/CN113187845A/en
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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
    • 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
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics

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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 disc type magnetorheological damper capable of automatically adjusting damping force, which comprises an outer cylinder body, an inner cylinder body, a rotating shaft, a hollow cylinder, a steering engine, an upper inertia block, a lower inertia block, a rotating speed sensor and a rotation adjusting device, wherein the outer cylinder body is provided with a first end and a second end; a cavity is formed between the outer cylinder body and the inner cylinder body; the steering engine is arranged in the cavity and is connected with the single chip microcomputer; the rotating shaft penetrates through the outer cylinder body and the inner cylinder body, a rotating speed sensor is mounted on the rotating shaft and connected with the single chip microcomputer, and the rotating speed sensor is located in the cavity; the steering engine controls the rotary adjusting device. The rotary regulating device is controlled by the steering engine, the position of a disc in the rotary regulating device is changed, the area of a magnetic line reaching a damping channel is changed, and the damping force is adjusted.

Description

Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof
Technical Field
The invention relates to a damper, in particular to a disc type magnetorheological fluid damper with adjustable damping force.
Background
The magnetorheological damper has wide market prospect in the aspects of shock absorption and the like, and is widely applied to automobile suspensions and the like, and has the advantages of adjustability and the like; the principle of vibration reduction is that the viscosity of the magnetorheological fluid in a magnetic field is controllable and adjustable (namely the magnetorheological fluid can realize adjustment change between a liquid state and a semi-solid state), and the change of the characteristics of the fluid in the damper can be realized by changing the magnetic field intensity, so that the change of the vibration reduction performance is realized.
In the existing market, for a disc type magnetorheological damper, the size of a magnetic field is generally changed by changing the size of current, so that the damping force is changed, and the larger the current is, the larger the magnetic field intensity penetrating through magnetorheological liquid is, the larger the flow characteristic change space of the magnetorheological liquid is, namely, the stronger the adjustability of a magnetorheological device is, and the better the performance is. However, no matter what kind of coil is adopted, the maximum electrifying current upper limit is provided, namely the controllability of the magnetorheological damper is within a certain range, and meanwhile, the trend of the magnetic field is also fixed.
Disclosure of Invention
Based on the problems, the invention provides the disc type magnetorheological damper capable of automatically adjusting the damping force.
The technical scheme adopted by the invention is as follows:
a disc type magnetorheological damper capable of automatically adjusting damping force comprises an outer cylinder body, an inner cylinder body, a rotating shaft, a hollow cylinder, a steering engine, an upper inertia block, a lower inertia block, a rotating speed sensor and a rotation adjusting device; a cavity is formed between the outer cylinder body and the inner cylinder body; the steering engine is arranged in the cavity and is connected with the single chip microcomputer; the rotating shaft penetrates through the outer cylinder body and the inner cylinder body, a rotating speed sensor is mounted on the rotating shaft and connected with the single chip microcomputer, and the rotating speed sensor is located in the cavity;
a hollow cylinder, an upper inertia block, a lower inertia block and a rotary regulating device are arranged in the inner cylinder body; the rotary regulating and controlling device is positioned between the upper inertia block and the lower inertia block; a gap between the upper end of the upper inertia block and the inner cylinder body is a first damping channel, and a gap between the lower end of the upper inertia block and the upper end of the rotation control device is a second damping channel; a gap between the upper end of the lower inertia block and the lower end of the rotation control device is a third damping channel, and a gap between the lower end of the lower inertia block and the inner cylinder body is a fourth damping channel; a gap is formed between the hollow cylinder and the upper inertia block; magnetorheological fluid is injected into each channel; an upper magnetic resistance ring is fixed on one side of the upper inertia block; a lower magnetic resistance ring is fixed on one side of the lower inertia block, and coils are arranged on one sides of the upper magnetic resistance ring and the lower magnetic resistance ring;
the shaft of the steering engine is excessively matched with the hollow cylinder, namely, no gap exists between the shaft of the steering engine and the hollow cylinder;
the rotation regulating device is positioned among the upper inertia block, the lower inertia block, the upper magnetic resistance ring and the lower magnetic resistance ring; the rotary regulating device is circular, and the shaft of the steering engine is connected with the rotary regulating device and is coaxial with the rotary regulating device; the rotary regulating device comprises an outer ring and a disk, wherein the disk is surrounded by the outer ring; wherein the outer ring is a magnetic conduction area; the disc is divided equally by taking the shaft of the steering engine as a central line, wherein one half of the disc is a magnetic resistance disc, and the other half of the disc is a magnetic conduction disc.
Furthermore, four steering engines are uniformly distributed in the cavity.
Furthermore, four rotary regulating and controlling devices are uniformly distributed in the inner cylinder body; each steering engine controls a rotary regulating device.
A disc type magneto-rheological damper control method capable of automatically adjusting damping force is characterized in that a rotating speed sensor detects rotating speed of a rotating shaft and transmits a rotating speed signal to a single chip microcomputer, and the single chip microcomputer controls a steering engine according to actual needs, so that control over a rotating regulation and control device is achieved; when the rotating speed of the rotating shaft is continuously increased, the steering engine controls the rotating regulation and control device step by step, and the control of the four-gear damping force can be realized; the initial state of the rotation regulating and controlling device is that the magnetic resisting discs in the four rotation regulating and controlling devices are positioned at the near magnetic coil;
when the rotating speed of the rotating shaft is increased, a first-gear damping is added, one steering engine controls one rotating regulation and control device to rotate for 180 degrees, one magnetic conductive disc is positioned close to the magnetic coil, and the magnetic resistance discs in the other three rotating regulation and control devices are positioned close to the magnetic coil;
when the rotating speed of the rotating shaft is continuously increased, two gears of damping are required to be added, the single chip microcomputer controls the other steering engine, the steering engine controls the second rotation regulating and controlling device to rotate for 180 degrees, and the output damping force is correspondingly increased; at the moment, two magnetic conductive disks are positioned near the magnetic coil, and magnetic resistant disks in the other two rotary regulating and controlling devices are positioned near the magnetic coil;
the single chip microcomputer controls a third steering engine which controls the third rotary regulating and controlling device to rotate 180 degrees, and the output damping force is correspondingly increased; at the moment, the three magnetic conductive disks are positioned near the magnetic coil, and the magnetic resistant disk in the other rotary regulating and controlling device is positioned near the magnetic coil;
the four-gear damping is needed, the singlechip controls a fourth steering engine, the steering engine controls the fourth rotary regulating and controlling device to rotate for 180 degrees, and the output damping force is correspondingly increased again; at this time, the four magnetically conductive disks are located near the magnetic coil.
According to the disc type magnetorheological damper capable of automatically adjusting the damping force, the end, close to the rudder machine, of the hollow cylinder is fixed with the inner cylinder body and is coaxially arranged with the steering machine shaft, and the rudder machine shaft is excessively matched with the hollow cylinder, so that the rotation of the shaft and magnetorheological fluid are prevented from leaking. The steering engine and the rotation speed sensor are positioned in a cavity formed by the outer cylinder body and the inner cylinder body, a steering engine shaft is connected with the rotation regulating and controlling device through a hollow cylinder to realize the control of the steering engine on the rotation regulating and controlling mechanism, and the rotation speed sensor is connected with an external singlechip and can transmit a rotation speed signal to the singlechip; meanwhile, the steering engine is also connected with an external single chip microcomputer, a rotating speed sensor detects rotating speed and transmits a rotating speed signal to the single chip microcomputer, and the single chip microcomputer controls the rotating regulation and control device through the steering engine according to the rotating speed; when the rotating shaft is at a low rotating speed, the magnetic resistance discs of the four rotary regulating mechanisms are not conducted with the semicircular parts to work, the damping force provided at the moment is small, the rotary regulating mechanisms can be sequentially controlled to rotate for 180 degrees along with the increase of the rotating speed, and the magnetic conduction discs work to enable the damping force to increase along with the increase of the rotating speed.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of a rotation regulating device according to the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
fig. 4 is a cross-sectional view of the rotation regulating device in the present invention.
Detailed Description
The technical solution of the present invention is described in detail below. The embodiments of the present invention are provided only for illustrating a specific structure, and the scale of the structure is not limited by the embodiments.
Referring to fig. 1 to 4, a disc type magnetorheological damper capable of automatically adjusting damping force comprises an outer cylinder body 1, an inner cylinder body 2, a rotating shaft 3, a hollow cylinder 4, a steering engine 5, an upper inertia block 6, a lower inertia block 7, a rotating speed sensor 8 and a rotation regulating device 9; a cavity 11 is formed between the outer cylinder body 1 and the inner cylinder body 2; the steering engine 5 is arranged in the cavity 11 and is connected with the single chip microcomputer; the rotating shaft 3 penetrates through the outer cylinder body 1 and the inner cylinder body 2, a rotating speed sensor 8 is installed on the rotating shaft 3, the rotating speed sensor 8 is connected with the single chip microcomputer, and the rotating speed sensor 8 is located in the cavity 11; the shaft 51 of the steering engine 5 is excessively matched with the hollow cylinder 4, namely, no gap exists between the shaft 51 of the steering engine 5 and the hollow cylinder 4. Four steering engines are uniformly distributed in the cavity. Each steering engine controls one rotary regulating device, namely four rotary regulating devices are uniformly distributed in the inner cylinder body;
a hollow cylinder 4, an upper inertia block 6, a lower inertia block 7 and a rotary regulating device 9 are arranged in the inner cylinder body 2; the rotary regulating and controlling device 9 is positioned between the upper inertia block 6, the lower inertia block 7, the upper magnetic resistance ring 21 and the lower magnetic resistance ring 22; a gap between the upper end of the upper inertia block 6 and the inner cylinder body 2 is a first damping channel 23, and a gap between the lower end of the upper inertia block 6 and the upper end of the rotation control device 9 is a second damping channel 24; a gap between the upper end of the lower inertia block 7 and the lower end of the rotation control device 9 is a third damping channel 25, and a gap between the lower end of the lower inertia block 7 and the inner cylinder body 2 is a fourth damping channel 26; a gap is formed between the hollow cylinder 4 and the upper inertia block 6; the magnetorheological fluid is positioned in each damping channel and magnetic lines of force 28 can pass through; an upper magnetic resistance ring 21 is fixed on one side of the upper inertia block 6; a lower magnetism-resisting ring 22 is fixed on one side of the lower inertia block 7, and a coil 27 is arranged on one side of the upper magnetism-resisting ring 21 and one side of the lower magnetism-resisting ring 22.
The rotary regulating and controlling device 9 is circular, the shaft of the steering engine 5 is connected with the rotary regulating and controlling device 9 and is coaxial with the rotary regulating and controlling device; the rotation regulating device 9 comprises an outer ring 91 and a disc 92, wherein the outer ring 91 surrounds the disc 92; wherein the outer ring 91 is a magnetic conducting area; the disc 92 is divided equally by taking the shaft of the steering engine as a central line, wherein one half is a magnetic resistance disc 921, and the other half is a magnetic conduction disc 922.
A disc type magneto-rheological damper control method capable of automatically adjusting damping force is characterized in that a rotating speed sensor detects rotating speed of a rotating shaft and transmits a rotating speed signal to a single chip microcomputer, and the single chip microcomputer controls a steering engine according to actual needs, so that control over a rotating regulation and control device is achieved; when the rotating speed of the rotating shaft is continuously increased, the steering engine controls the rotating regulation and control device step by step, and the control of the four-gear damping force can be realized; the initial state of the rotation regulating and controlling device is that the magnetic resisting discs in the four rotation regulating and controlling devices are positioned at the near magnetic coil;
when the rotating speed of the rotating shaft is increased, a first-gear damping is added, one steering engine controls one rotating regulation and control device to rotate for 180 degrees, one magnetic conductive disc is positioned close to the magnetic coil, and the magnetic resistance discs in the other three rotating regulation and control devices are positioned close to the magnetic coil; FIG. 1 shows a magnetic resistance disc of one of the rotation control devices being close to the coil and a magnetic conduction disc of the other rotation control device being close to the coil;
when the rotating speed of the rotating shaft is continuously increased, two gears of damping are required to be added, the single chip microcomputer controls the other steering engine, the steering engine controls the second rotation regulating and controlling device to rotate for 180 degrees, and the output damping force is correspondingly increased; at the moment, two magnetic conductive disks are positioned near the magnetic coil, and magnetic resistant disks in the other two rotary regulating and controlling devices are positioned near the magnetic coil;
the single chip microcomputer controls a third steering engine which controls the third rotary regulating and controlling device to rotate 180 degrees, and the output damping force is correspondingly increased; at the moment, the three magnetic conductive disks are positioned near the magnetic coil, and the magnetic resistant disk in the other rotary regulating and controlling device is positioned near the magnetic coil;
the four-gear damping is needed, the singlechip controls a fourth steering engine, the steering engine controls the fourth rotary regulating and controlling device to rotate for 180 degrees, and the output damping force is correspondingly increased again; at this time, the four magnetically conductive disks are located near the magnetic coil.

Claims (4)

1. A disc type magnetorheological damper capable of automatically adjusting damping force is characterized by comprising an outer cylinder body, an inner cylinder body, a rotating shaft, a hollow cylinder, a steering engine, an upper inertia block, a lower inertia block, a rotating speed sensor and a rotation adjusting device; a cavity is formed between the outer cylinder body and the inner cylinder body; the steering engine is arranged in the cavity and is connected with the single chip microcomputer; the rotating shaft penetrates through the outer cylinder body and the inner cylinder body, the rotating speed sensor is mounted on the rotating shaft, the rotating speed sensor is connected with the single chip microcomputer, and the rotating speed sensor is located in the cavity;
the inner cylinder body is internally provided with a hollow cylinder, an upper inertia block, a lower inertia block and a rotary regulating device; the rotation regulating and controlling device is positioned between the upper inertia block and the lower inertia block; a gap between the upper end of the upper inertia block and the inner cylinder body is a first damping channel, and a gap between the lower end of the upper inertia block and the upper end of the rotation control device is a second damping channel; a gap between the upper end of the lower inertia block and the lower end of the rotation control device is a third damping channel, and a gap between the lower end of the lower inertia block and the inner cylinder body is a fourth damping channel; a gap is formed between the hollow cylinder and the upper inertia block; magnetorheological fluid is injected into each channel; an upper magnetic resistance ring is fixed on one side of the upper inertia block; a lower magnetic resistance ring is fixed on one side of the lower inertia block, and coils are arranged on one sides of the upper magnetic resistance ring and the lower magnetic resistance ring;
the shaft of the steering engine is excessively matched with the hollow cylinder, namely, no gap exists between the shaft of the steering engine and the hollow cylinder;
the rotation regulating and controlling device is positioned among the upper inertia block, the lower inertia block, the upper magnetic resistance ring and the lower magnetic resistance ring; the rotary regulating device is circular, and the shaft of the steering engine is connected with the rotary regulating device and is coaxial with the rotary regulating device; the rotary regulating device comprises an outer ring and a disk, wherein the disk is surrounded by the outer ring; wherein the outer ring is a magnetic conduction area; the disc is divided equally by taking the shaft of the steering engine as a central line, wherein one half of the disc is a magnetic resistance disc, and the other half of the disc is a magnetic conduction disc.
2. The disc type magnetorheological damper capable of automatically adjusting the damping force as claimed in claim 1, wherein the four steering engines are uniformly distributed in the cavity.
3. The disc type magnetorheological damper capable of automatically adjusting the damping force according to claim 1, wherein the number of the rotation adjusting and controlling devices is four, and the four rotation adjusting and controlling devices are uniformly distributed on the inner cylinder body; each steering engine controls a rotary regulating device.
4. A control method of a disc type magneto-rheological damper capable of automatically adjusting damping force is characterized by comprising the following steps: the rotation speed sensor detects the rotation speed of the rotating shaft and transmits a rotation speed signal to the single chip microcomputer, and the single chip microcomputer controls the steering engine according to actual needs, so that the control of the rotation regulation and control device is realized; when the rotating speed of the rotating shaft is continuously increased, the steering engine controls the rotating regulation and control device step by step, and the control of the four-gear damping force can be realized; the initial state of the rotation regulating and controlling device is that the magnetic resisting discs in the four rotation regulating and controlling devices are positioned at the near magnetic coil;
when the rotating speed of the rotating shaft is increased, a first-gear damping is added, one steering engine controls one rotating regulation and control device to rotate for 180 degrees, one magnetic conductive disc is positioned close to the magnetic coil, and the magnetic resistance discs in the other three rotating regulation and control devices are positioned close to the magnetic coil;
when the rotating speed of the rotating shaft is continuously increased, two gears of damping are required to be added, the single chip microcomputer controls the other steering engine, the steering engine controls the second rotation regulating and controlling device to rotate for 180 degrees, and the output damping force is correspondingly increased; at the moment, two magnetic conductive disks are positioned near the magnetic coil, and magnetic resistant disks in the other two rotary regulating and controlling devices are positioned near the magnetic coil;
the single chip microcomputer controls a third steering engine which controls the third rotary regulating and controlling device to rotate 180 degrees, and the output damping force is correspondingly increased; at the moment, the three magnetic conductive disks are positioned near the magnetic coil, and the magnetic resistant disk in the other rotary regulating and controlling device is positioned near the magnetic coil;
the four-gear damping is needed, the singlechip controls a fourth steering engine, the steering engine controls the fourth rotary regulating and controlling device to rotate for 180 degrees, and the output damping force is correspondingly increased again; at this time, the four magnetically conductive disks are located near the magnetic coil.
CN202110612499.1A 2020-12-29 2021-06-02 Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof Pending CN113187845A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2020115954643 2020-12-29
CN202011595464.3A CN112628340A (en) 2020-12-29 2020-12-29 Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof

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CN113187845A true CN113187845A (en) 2021-07-30

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CN202011595464.3A Pending CN112628340A (en) 2020-12-29 2020-12-29 Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof
CN202110612499.1A Pending CN113187845A (en) 2020-12-29 2021-06-02 Disc type magnetorheological damper capable of automatically adjusting damping force and control method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114086996A (en) * 2021-11-16 2022-02-25 重庆大学 Graded energy-absorbing self-starting anti-impact device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114086996A (en) * 2021-11-16 2022-02-25 重庆大学 Graded energy-absorbing self-starting anti-impact device and method
CN114086996B (en) * 2021-11-16 2023-12-01 重庆大学 Hierarchical energy-absorbing self-starting anti-impact device and method

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