CN110566624B - Semi-active vibration damper capable of phase-splitting self-adaptive control - Google Patents
Semi-active vibration damper capable of phase-splitting self-adaptive control Download PDFInfo
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- CN110566624B CN110566624B CN201910925794.5A CN201910925794A CN110566624B CN 110566624 B CN110566624 B CN 110566624B CN 201910925794 A CN201910925794 A CN 201910925794A CN 110566624 B CN110566624 B CN 110566624B
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- 238000013016 damping Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 14
- 230000003044 adaptive effect Effects 0.000 claims 2
- 238000005191 phase separation Methods 0.000 claims 2
- 239000003921 oil Substances 0.000 description 40
- 230000009467 reduction Effects 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- 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)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a semi-active vibration damper capable of being controlled in a split-phase self-adaptive manner, which comprises an upper supporting seat and a lower supporting seat which are connected with each other through bolts, wherein a cavity is arranged on the inner annular wall of the shell at equal intervals, a boss which is integrated with the cavity into a whole is arranged on the inner cavity wall of the cavity, a coil is wound on the boss, an oil groove concave channel is arranged in the middle of the outer surface of the shell along the circumferential direction, and oil inlet holes are arranged in the oil groove concave channel at equal intervals; the cavity wall outside the cavity is provided with a T-shaped slot which is integrated with the cavity, and a T-shaped block which is arranged on the outer ring of the bearing supporting ring and is integrated with the bearing supporting ring is embedded in the T-shaped slot. The invention provides the damping force with proper size and direction for the rotary machine according to the vibration amplitude and phase of the rotary machine, so that the vibration of the rotary machine is adaptively controlled, and the stability of the damping device is greatly improved.
Description
Technical Field
The invention relates to the field of vibration reduction of rotary machinery, in particular to a semi-active vibration reduction device capable of being controlled in a split-phase self-adaptive mode.
Background
Squeeze film dampers (Squeeze Film Damper, abbreviated as "SFD") are a new technology developed in the 60 s of the last century, and have developed faster in the 80 s. The vibration reduction effect is remarkable, and the occupied space is small, so that the vibration reduction device is firstly applied to an aeroengine and is now a typical design for reducing the vibration of the engine. The SFD has the basic structure that the interference fit between the outer ring of the rolling bearing and the bearing seat is changed into proper clearance fit, the rotation of the inner ring is limited by using a pin or a squirrel cage elastic support, the clearance is filled with lubricating oil, the journal whirls to squeeze the lubricating oil between the inner ring and the outer ring, and kinetic energy is converted into internal energy through viscous damping of the lubricating oil, so that the SFD has the function of vibration reduction. SFD, while having a significant damping effect, is a passive damper, and if not designed well or the imbalance of the rotor system worsens, the non-linearity of the oil film force can increase greatly, thus resulting in a number of deleterious non-linear responses such as non-coordinated precession of the rotor, bistable jumps, and "lock-up" beyond the critical rotational speed. In order to overcome the above-mentioned shortcomings, the damper is improved in many ways on the original basis, for example, the use of lubricating oil is changed into the use of magnetorheological fluid. Magnetorheological fluid (Magnetorheological Fluid, MR fluid for short) belongs to controllable fluid and is a relatively active research branch in intelligent materials. The magneto-rheological liquid is a suspension formed by mixing tiny soft magnetic particles with high magnetic conductivity and low magnetic hysteresis with non-magnetic permeability. Such suspensions exhibit newtonian fluid behavior of low viscosity under zero magnetic field conditions; under the action of strong magnetic field, the Bingham body has the characteristics of high viscosity and low fluidity. Among the most widely studied and most rapidly developed applications are car seat dampers, brakes, active drives and earth-mode mechanism dampers.
However, the damper generally needs to adopt a cantilever type elastic support, and the elastic support and the extrusion oil film respectively and independently act, so that the structure is large in size, complex in structure and difficult to assemble. In addition, since they are all oil films around the circumference, the phase of the oil film force generated is not controllable, and in a rotary machine, precise control cannot be performed according to the amplitude and phase of vibration, particularly when the rotary machine fails, such as rub-impact, sudden imbalance, and the like, the damper tends to fail. The existing vibration damper still lacks the capability of adjusting damping force phase, has large structural size, complex structure and difficult assembly, so that the stability is poor in the actual use process, and the vibration damper also fails when the vibration damper has an unsatisfactory vibration damping effect, particularly when the rotary machine fails.
Therefore, there is an urgent need in the art for a vibration damping device that is miniaturized, has a simple structure, and has good stability.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the semi-active vibration damper which can provide damping force with proper magnitude and direction for the rotary machine according to the vibration amplitude and phase of the rotary machine, so that the vibration of the rotary machine can be adaptively controlled, and has the advantages of simple structure and small size.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the semi-active vibration damper is characterized in that an oil supply hole is formed in the upper end face of the upper supporting seat, a damper is arranged between the upper supporting seat and the lower supporting seat, the damper comprises a shell, a cavity is arranged on the inner annular wall of the shell at equal intervals, a boss which is integrated with the cavity into a whole is arranged on the inner cavity wall of the cavity, a coil is wound on the boss, and an oil film area capable of containing magnetorheological fluid is formed in a gap between the end part of the boss and the inner annular wall of the shell; an oil groove concave channel is formed in the middle of the outer surface of the shell along the circumferential direction, and oil inlet holes are formed in the oil groove concave channel at equal intervals; sealing rings for preventing magnetorheological fluid from overflowing along the axial direction are respectively arranged on the side parts of the two sides of the outer surface of the shell, and a left lug and a right lug which are used for being matched with grooves formed in the upper supporting seat and the lower supporting seat are respectively arranged at the left end part and the right end part of the shell; the cavity wall outside the cavity body is provided with a T-shaped slot which is integrated with the cavity body, T-shaped blocks which are arranged on an outer ring of the bearing supporting ring and integrated with the bearing supporting ring are inserted in the T-shaped slot, positioning stop blocks which are buckled with the end faces of the T-shaped slot are respectively arranged at two axial ends of the T-shaped blocks, a bearing is fixedly arranged on an inner ring of the bearing supporting ring, and sealing gaskets which are used for preventing magnetorheological fluid from entering the inner ring of the bearing supporting ring are respectively arranged at two sides of the bearing supporting ring.
The front end cover and the rear end cover which are connected with the upper supporting seat and the lower supporting seat and used for axially fixing the shell are respectively arranged at the two axial ends of the damper.
The lower end surfaces of the front end cover and the rear end cover are respectively provided with an oil unloading hole communicated with the cavity.
The oil supply hole is communicated with the oil groove concave channel.
The oil inlet is communicated with the cavity.
The sealing ring is an O-shaped structure sealing ring.
The sealing gasket is of a trapezoid structure.
The space between the cavity bodies is 10mm-30mm.
The distance between the oil inlet holes is 10mm-30mm.
Compared with the prior art, the invention has the beneficial effects that: the magnetic film region is formed through the magnetorheological fluid, and the magnetic field perpendicular to the oil film gap is generated through the coils, so that the vibration damper can adaptively supply proper current to each coil according to the rotating speed, the vibration amplitude and the phase of the rotor, thereby providing proper damping force for the rotary machine according to the vibration amplitude and the phase of the rotary machine, enabling the vibration of the rotary machine to be adaptively controlled, greatly improving the stability of the vibration damper, and having simple structure, small size and reduced processing cost.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the front view structure of the present invention.
FIG. 3 is a cross-sectional view of the A-A side of the present invention.
FIG. 4 is a cross-sectional view of the B-B side of the present invention.
FIG. 5 is a cross-sectional view of the C-C face of the present invention.
Fig. 6 is a schematic structural view of the damper.
Fig. 7 is a schematic structural view of the housing.
Reference numerals: the novel oil-supply type hydraulic oil pump comprises a 1-oil supply hole, a 2-upper supporting seat, a 3-lower supporting seat, a 4-front end cover, a 5-sealing ring, a 6-oil groove concave channel, a 7-oil inlet hole, an 8-oil film region, a 9-rear end cover, a 10-sealing gasket, an 11-oil unloading hole, a 12-right bump, a 13-bearing supporting ring, a 14-positioning stop block, a 15-coil, a 16-left bump, a 17-shell, an 18-T-shaped block, a 19-left groove, a 20-right groove, a 21-cavity body, a 22-boss, a 23-T-shaped slot, a 24-bearing, a 25-bolt hole, a 26-positioning pin hole, a 27-hexagon socket bolt, a 28-positioning pin, a 29-internally threaded hole, a 30-positioning hole and a 31-cross-slot countersunk head screw.
Detailed Description
The invention is further described below with reference to examples.
The semi-active vibration damper capable of being controlled in a split-phase self-adaptive manner is shown in fig. 1-5 and comprises an upper supporting seat 2 and a lower supporting seat 3 which are connected with each other through bolts, and is characterized in that an oil supply hole 1 is formed in the upper end face of the upper supporting seat 2, a damper shown in fig. 6 is arranged between the upper supporting seat 2 and the lower supporting seat 3, the damper comprises a shell 17 shown in fig. 7, a cavity 21 is arranged on the inner annular wall of the shell 17 at equal intervals, a boss 22 which is integrated with the cavity 21 is arranged on the inner side of the cavity 21, a coil 15 is wound on the boss 22, and an oil film area 8 capable of containing magnetorheological fluid is formed by a gap between the end part of the boss 22 and the inner annular wall of the shell 17; the middle part of the outer surface of the shell 17 is provided with oil groove concave channels 6 along the circumferential direction, and oil inlet holes 7 are arranged in the oil groove concave channels 6 at equal intervals; sealing rings 5 with O-shaped structures for preventing magnetorheological fluid from overflowing along the axial direction are respectively arranged on two side parts of the outer surface of the shell 17, and a left lug 16 and a right lug 12 which are used for being matched with grooves formed in the upper supporting seat 2 and the lower supporting seat 3 are respectively arranged at the left end part and the right end part of the shell 17; the cavity wall outside the cavity 21 is provided with a T-shaped slot 23 which is integrated with the cavity 21, the T-shaped slot 23 is internally provided with a T-shaped block 18 which is arranged on the outer ring of the bearing support ring 13 and is integrated with the bearing support ring 13, the two axial ends of the T-shaped block 18 are respectively provided with a positioning stop block 14 which is buckled with the end face of the T-shaped slot 23, the inner ring of the bearing support ring 13 is fixedly provided with a bearing 24, the two sides of the bearing support ring 13 are respectively provided with a trapezoid sealing gasket 10 which is used for preventing magnetorheological fluid from entering the inner ring of the bearing support ring 13, and the magnetorheological fluid is sealed in a sealing cavity formed between the outer ring of the bearing support ring 13 and the inner ring of the shell 17.
The front end cover 4 and the rear end cover 9 which are connected with the upper supporting seat 2 and the lower supporting seat 3 and used for axially fixing the shell 17 are respectively arranged at the two axial ends of the damper.
The lower end surfaces of the front end cover 4 and the rear end cover 9 are respectively provided with oil discharge holes 11 communicated with the cavity 21.
The oil supply hole 1 is communicated with the oil groove concave channel 6.
The oil inlet 7 is communicated with the cavity 21.
The spacing between the cavities 21 is 10mm-30mm, in this embodiment 20mm.
The distance between the oil inlet holes 7 is 10mm-30mm, and in this embodiment, the distance is 20mm.
The working principle of the semi-active vibration damper capable of being controlled in a split-phase self-adaptive manner provided by the invention is as follows: the magnetorheological fluid is supplied to the oil supply holes of the upper supporting seat 2 through the oil supply pump, enters the oil groove concave channels 6 in the circumferential direction of the shell, and then enters the cavity bodies 21 through the oil inlet holes which are distributed on the shell 17 at equal intervals respectively to form an oil film; then, the coil 15 is energized to generate a magnetic field perpendicular to the oil film gap, so that disordered magnetorheological fluid magnetic particles are orderly arranged along the magnetic field direction. According to the rotating speed, the vibration amplitude and the phase of the rotor, the phase-splitting self-adaption provides proper current for each coil, so that proper magnetic fields are generated to act on the cavity structures distributed at equal intervals, and the viscosity of magnetorheological fluid in each cavity is changed along with the change of the magnetic field intensity. Thus, damping force with proper magnitude and direction can be provided for the rotary machine according to the vibration amplitude and phase of the rotary machine, so that the vibration of the rotary machine can be adaptively controlled. When the rotating machine passes through the critical rotating speed, the current of each coil can be respectively and independently regulated to a proper value, so that the yield stress of the magnetorheological fluid is changed, the natural frequency of the rotating machine is further changed, the rotating machine avoids the resonance area, and the control of the rotating machine in the full rotating speed range is realized.
According to the invention, the bearing supporting ring 13 and the shell 17 are connected into a whole through the T-shaped slot 23 and the T-shaped block 18, the two side surfaces are fixed through the positioning stop block 14, holes are formed at the two ends of the front end surface and the rear end surface of the T-shaped slot 23 and the corresponding positions of the two ends of the positioning stop block 14, and the positioning stop block 14 is fixed on the front end surface and the rear end surface of the T-shaped slot 23 by inserting the cross-shaped slot countersunk head screw 31 into the holes, so that the axial movement of the T-shaped block 18 is limited.
The left lug 16 and the right lug 12 in the circumferential direction of the shell 17 are respectively positioned on the front end surface and the rear end surface of the shell 17, correspondingly, a left groove 19 and a right groove 20 are respectively arranged in the upper supporting seat 2 and the lower supporting seat 3, the left lug 16 is clamped in the left groove 19, the right lug 12 is clamped in the right groove 20, so that the shell is positioned in the upper supporting seat 2 and the lower supporting seat 3, and the damper is prevented from rotating in the supporting seats; the front end face and the rear end face of the upper supporting seat 2 and the lower supporting seat 3 are respectively provided with an internal threaded hole 29 and a positioning hole 30, the front end cover 4 and the rear end cover 9 are respectively provided with a bolt hole 25 and a positioning pin hole 26, the positions of the internal threaded holes 29 and the bolt holes 25 are correspondingly arranged, the positioning holes 30 and the positioning pin holes 26 are correspondingly arranged, the inner hexagon bolts 27 penetrate through the bolt holes 25 and the internal threaded holes 29 and are screwed up, the positioning pins 28 penetrate through the positioning pin holes 26 and the positioning holes 30, the front end cover 4 and the rear end cover 9 are tightly connected with the upper supporting seat 2 and the lower supporting seat 3, the damper is clamped between the front end cover 4 and the rear end cover 9, the axial fixation of the shell 17 is realized, and the axial movement of the damper is prevented. The contact parts at the two sides of the upper and lower supporting seats are penetrated and fastened together through longitudinal bolts, so that the upper and lower supporting seats are buckled more tightly, and the damper is further prevented from moving around.
The magnetorheological fluid in the embodiment adopts SG-MRF2035 model, enters the oil groove concave channel 6 through the oil supply holes 1 vertically communicated on the upper supporting seat 2, is distributed on the whole circumference, and is filled into the cavity bodies 21 distributed at equal intervals through the circumferential oil inlet holes 7. The coil 15 is connected to a power source, and the coil 15 is energized at this time, so that the coil 15 generates a magnetic field, and the magnetorheological fluid flows out of the vibration damping device through the oil discharge hole 11 penetrating the cavity 21.
The present invention is not limited to the above-described embodiments, and it is apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (5)
1. The semi-active vibration damper capable of being controlled in a split-phase self-adaptive manner comprises an upper supporting seat (2) and a lower supporting seat (3) which are connected with each other through bolts, and is characterized in that an oil supply hole (1) is formed in the upper end face of the upper supporting seat (2), a damper is arranged between the upper supporting seat (2) and the lower supporting seat (3), the damper comprises a shell (17), a cavity (21) is arranged on the inner annular wall of the shell (17) at equal intervals, a boss (22) which is integrally structured with the cavity (21) is arranged on the inner annular wall of the cavity (21), a coil (15) is wound on the boss (22), and an oil film region (8) capable of containing magnetorheological fluid is formed in a gap between the end part of the boss (22) and the inner annular wall of the shell (17); an oil groove concave channel (6) is formed in the middle of the outer surface of the shell (17) along the circumferential direction, oil inlet holes (7) are formed in the oil groove concave channel (6) at equal intervals, sealing rings (5) for preventing magnetorheological fluid from overflowing along the axial direction are respectively arranged on the side parts of two sides of the outer surface of the shell (17), and left and right protruding blocks (16) and right protruding blocks (12) which are used for being matched with grooves formed in the upper supporting seat (2) and the lower supporting seat (3) are respectively arranged at the left and right end parts of the shell (17); the device is characterized in that a T-shaped slot (23) which is integrally structured with the hollow cavity (21) is formed in the cavity wall at the outer side of the hollow cavity (21), T-shaped blocks (18) which are integrally structured with the bearing support ring (13) and are arranged on the outer ring of the bearing support ring (13) are inserted in the T-shaped slot (23), positioning stop blocks (14) which are buckled with the end faces of the T-shaped slot (23) are respectively arranged at the two axial ends of the T-shaped blocks (18), a bearing (24) is fixedly arranged on the inner ring of the bearing support ring (13), and sealing gaskets (10) which are used for preventing magnetorheological fluid from entering the inner ring of the bearing support ring (13) are respectively arranged at the two sides of the bearing support ring (13);
the front end cover (4) and the rear end cover (9) which are connected with the upper supporting seat (2) and the lower supporting seat (3) and used for axially fixing the shell (17) are respectively arranged at the two axial ends of the damper;
the lower end surfaces of the front end cover (4) and the rear end cover (9) are respectively provided with an oil discharge hole (11) communicated with the cavity (21);
the space between the cavity bodies (21) is 10mm-30mm;
the distance between the oil inlet holes (7) is 10mm-30mm.
2. The semi-active vibration damper with phase-separation adaptive control according to claim 1, wherein the oil supply hole (1) is communicated with the oil groove concave channel (6).
3. The semi-active vibration damper capable of achieving phase separation self-adaptive control according to claim 1, wherein the oil inlet hole (7) is communicated with the cavity (21).
4. Semi-active vibration damper with phase-splitting self-adaptive control according to claim 1, characterized in that the sealing ring (5) is an O-shaped structure sealing ring.
5. Semi-active vibration damping device with phase-splitting adaptive control according to claim 1, characterized in that the gasket (10) is a trapezoid gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910925794.5A CN110566624B (en) | 2019-09-27 | 2019-09-27 | Semi-active vibration damper capable of phase-splitting self-adaptive control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910925794.5A CN110566624B (en) | 2019-09-27 | 2019-09-27 | Semi-active vibration damper capable of phase-splitting self-adaptive control |
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| CN110566624A CN110566624A (en) | 2019-12-13 |
| CN110566624B true CN110566624B (en) | 2024-02-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113950937B (en) * | 2021-09-24 | 2023-08-18 | 江苏大学 | Threshing cylinder vibration monitoring and slowing system and method and combine harvester |
| CN114091314B (en) * | 2022-01-24 | 2023-04-07 | 天津仁爱学院 | Vibration prediction method of rotor system model based on magneto-rheological damper |
| CN114810908B (en) * | 2022-04-26 | 2023-02-17 | 清华大学 | Self-sensing magnetorheological damper |
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