CN111042367A - Composite magnetic control extrusion shock absorber with double special-shaped pistons - Google Patents
Composite magnetic control extrusion shock absorber with double special-shaped pistons Download PDFInfo
- Publication number
- CN111042367A CN111042367A CN201911146442.6A CN201911146442A CN111042367A CN 111042367 A CN111042367 A CN 111042367A CN 201911146442 A CN201911146442 A CN 201911146442A CN 111042367 A CN111042367 A CN 111042367A
- Authority
- CN
- China
- Prior art keywords
- piston
- main
- piston rod
- cylinder body
- shock absorber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a composite magnetic control extrusion shock absorber with double special-shaped pistons, which comprises a main piston rod, an auxiliary cylinder body, a main cylinder body, an auxiliary piston part and a main piston part, wherein the main cylinder body is provided with a piston rod hole; the auxiliary cylinder body is connected with the main cylinder body through a connecting cylinder cover, an MRG chamber is arranged in the auxiliary cylinder body, an STG chamber is arranged in the main cylinder body, an auxiliary piston part is arranged in the MRG chamber, a main piston part is arranged in the main cylinder body, the main piston rod penetrates through the MRG chamber and extends into the STG chamber, an auxiliary piston rod is arranged in the STG chamber, and the auxiliary piston rod is connected with the main piston rod; the special-shaped main piston and the composite high-damping material are combined, so that extrusion energy dissipation and vibration reduction can be realized, and meanwhile, larger damping force and impact energy dissipation can be provided for the vibration absorber.
Description
Technical Field
The invention relates to a composite magnetic control extrusion shock absorber with double special-shaped pistons, and belongs to the technical field of structural shock absorption.
Background
With the increasing importance of the vibration isolation technology of buildings, the vibration isolation and vibration reduction device for buildings becomes a component of most vibration reduction devices, and can absorb the seismic energy by generating deformation during the earthquake to play a role in vibration isolation.
Shear Thickening Gel (STG) is used as a good Shear thickening material, and overcomes the defects of instability and difficult sealing of Shear thickening liquid (STF). Under seismic shock, the STG undergoes a transition from a viscous state to a rubbery state to a glassy state with increasing strain rate. When impacted, it can instantaneously change to a hard, glassy state, making it difficult to deform. Meanwhile, a large amount of energy is absorbed in the phase change process, and the rigidity and the deformation resistance are improved.
The magneto-rheological cement (MRG) is used as a good magneto-rheological material, and overcomes the defects of instability and difficult sealing of the magneto-rheological fluid (MRF). Under the action of earthquake impact, self-adjusting function can be provided for the vibration damper according to external load excitation, and the aim of controllable performance is achieved.
In the current domestic patents, the magnetorheological material and the shear thickening material are rarely applied to a vibration damping device together. The 'one-step permanent magnet magnetorheological damper' disclosed in the Chinese patent (application number 201610518080.9) can generate larger damping, and has the vibration damping performance of no energy consumption and high stability. But can not realize the functions of variable rigidity, extrusion, energy consumption and vibration reduction. The 'volume compensation isolation type single-rod magnetorheological damper' disclosed in the Chinese patent application No. 201710052593X adopts the combination of a single-rod magnetorheological damper working cavity and a volume compensation cavity, so that the working performance of the single-rod magnetorheological damper is ensured to be normal, but the damping effect is limited to a certain extent under the action of earthquakes with different vibration levels.
Disclosure of Invention
The invention aims to provide a composite magnetic control extrusion shock absorber with double special-shaped pistons, and the composite magnetic control extrusion shock absorber is used for solving the defects that the traditional viscous shock absorber in the prior art is single in working frequency and cannot effectively control different excitation frequencies.
A composite magnetic control extrusion shock absorber with double special-shaped pistons comprises a main piston rod, an auxiliary cylinder body, a main cylinder body, an auxiliary piston part and a main piston part;
the auxiliary cylinder body is connected with the main cylinder body through a connecting cylinder cover, an MRG cavity is arranged in the auxiliary cylinder body, an STG cavity is arranged in the main cylinder body, an auxiliary piston part is arranged in the MRG cavity, the main cylinder body is provided with a main piston part, the main piston rod penetrates through the MRG cavity and extends into the STG cavity, an auxiliary piston rod is arranged in the STG cavity, and the auxiliary piston rod is connected with the main piston rod.
Preferably, the auxiliary piston part comprises a special-shaped half ring, a belleville spring, an auxiliary piston a, an excitation coil, a coil sleeve, an auxiliary piston C and an auxiliary piston B, the special-shaped half ring is sleeved on the main piston rod, the auxiliary piston a and the auxiliary piston B are fixed between the special-shaped half ring through the belleville spring, the coil sleeve is arranged between the auxiliary piston a and the auxiliary piston B, the excitation coil is connected with the coil sleeve, and the auxiliary piston C is arranged between the auxiliary piston a and the auxiliary piston B and is connected with the main piston rod.
Preferably, the magnetic isolation copper sheets are arranged outside the auxiliary piston A and the auxiliary piston B.
Preferably, the auxiliary piston A and the auxiliary piston B and the coil sleeve are provided with O-shaped sealing rings A.
Preferably, the main piston part comprises a special-shaped main piston A, a high damping composite material layer A, a special-shaped main piston B and a high damping composite material layer B; the special-shaped main piston A is connected to the main piston rod, the special-shaped main piston B and the auxiliary piston rod are arranged on the main piston rod, and the high-damping composite material layer A and the high-damping composite material layer B are arranged in the special-shaped main piston A.
Preferably, the auxiliary piston rod is connected with the rear end cover through a bolt; the main cylinder body is connected with the front end cover and the rear end cover through pull rod bolts.
Preferably, a Yx-shaped sealing ring is arranged at the joint of the main piston rod and the front end cover.
Preferably, O-shaped sealing rings B are arranged at the joint of the front end cover and the auxiliary cylinder body and the joint of the rear end cover and the main cylinder body.
Preferably, a compensation chamber is provided between the STG chamber and the rear end cap.
Preferably, the main piston rod is externally provided with a single lug ring for the shaft.
Compared with the prior art, the invention has the following beneficial effects:
1. the MR shear thickening material filled in the main piston cylinder body has the dual characteristics of magnetic sensitivity and rate sensitivity, and the special-shaped main piston and the composite high-damping material are combined to realize extrusion energy dissipation and vibration reduction, and meanwhile, the special-shaped main piston and the composite high-damping material can provide larger damping force for the vibration absorber and dissipate impact energy.
2. The composite high-damping material in the special-shaped main piston cavity increases the damping energy consumption performance, and achieves the functions of high damping energy consumption and vibration reduction.
3. Aiming at the problem that the damping force of the traditional single-rod-out type MR shock absorber is too low in the vibration process, the volume compensation effect is achieved through the arrangement of the volume compensation chamber, and meanwhile, a certain damping force is provided for the shock absorber.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic illustration of a portion of the master piston of the shock absorber of the present invention;
FIG. 3 is a partial schematic view of a slave piston of the shock absorber of the present invention;
FIG. 4 is a schematic view of the secondary piston magnetic circuit of the shock absorber of the present invention;
FIG. 5 is a schematic structural view of a profiled master piston B of the shock absorber of the present invention;
fig. 6 is a schematic structural view of a special-shaped master piston a of the shock absorber.
In the figure: 1. a single lug ring for the shaft; 2. a main piston rod; 3. a front end cover; 4. a rear end cap; 5. a screw; 6. a magnetic isolation copper sheet; 7. a coil sleeve; 8. an O-shaped sealing ring A; 9. a field coil; 10. a secondary piston A; 11. a secondary piston B; 12. a secondary piston C; 13. a special-shaped semi-ring; 14. a belleville spring; 15. an MRG chamber; 16. an auxiliary cylinder body; 17. connecting the cylinder cover; 18. a special-shaped main piston A; 19. a high damping composite layer A; 20. a high damping composite material layer B; 21. a special-shaped main piston B; 22. an STG chamber; 23. a main cylinder body; 24. a compensation chamber; 25. a draw bar bolt; 26. a Yx-type seal ring; 27. an O-shaped sealing ring B; 28. and an auxiliary piston rod.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-6, a dual-shaped piston compound magnetic control extrusion shock absorber is disclosed, which comprises a main piston rod 2, an auxiliary cylinder 16, a main cylinder 23, an auxiliary piston part and a main piston part;
As shown in fig. 3, in the present embodiment, the secondary piston portion includes a shaped half ring 13, a belleville spring 14, a secondary piston a10, an excitation coil 9, a coil sleeve 7, a secondary piston C12 and a secondary piston B11, the shaped half ring 13 is sleeved on the main piston rod 2, the secondary piston a10 and the secondary piston B11 are fixed between the shaped half rings 13 through the belleville spring 14, and the belleville spring 14 can control the secondary piston portion not to work in case of small earthquake displacement. A coil sleeve 7 is provided between the sub piston a10 and the sub piston B11, the field coil 9 is connected to the coil sleeve 7, and as shown in fig. 1, the sub piston C12 is provided between the sub piston a10 and the sub piston B11 and connected to the main piston rod 2. And magnetic isolation copper sheets 6 are arranged outside the auxiliary piston A10 and the auxiliary piston B11 and are used for isolating magnetism. The auxiliary piston A10, the auxiliary piston B11 and the coil sleeve 7 are provided with O-shaped sealing rings A8; in case of large earthquake displacements, the MRG at the working gap between the sub-piston part and the inner wall of the sub-cylinder 16 may create a magnetorheological effect.
In this embodiment, the master piston portion includes a profiled master piston a18, a high damping composite layer a19, a profiled master piston B21, and a high damping composite layer B20; the special-shaped main piston A18 is connected to the main piston rod 2, the special-shaped main piston B21 and the auxiliary piston rod 28 are arranged in the special-shaped main piston A18 and on the main piston rod 2, the high-damping composite material layer A19 and the high-damping composite material layer B20 are arranged in the special-shaped main piston A18, the special-shaped main piston A18 and the special-shaped main piston B21 are mutually high-damping composite material layers, the extrusion energy consumption effect is achieved, and the shear thickening effect can be generated by the STG at the working gap between the main piston part and the inner wall of the main cylinder 23.
As shown in fig. 2, in the present embodiment, the secondary piston rod 28 is connected to the rear end cap 4 by a bolt; the main cylinder body 23 is connected with the front end cover 3 and the rear end cover 4 through the pull rod bolts 25, the front end cover 3 and the rear end cover 4 are fixed through bolts and are convenient to detach, meanwhile, the front end cover 3 and the rear end cover 4 can be fixed more firmly, a Yx type sealing ring 26 is arranged at the joint of the main piston rod 2 and the front end cover 3, an O type sealing ring B27 is arranged at the joint of the front end cover 3 and the auxiliary cylinder body 16 and the joint of the rear end cover 4 and the main cylinder body 23, and sundries outside the cylinder body are prevented from entering the.
As shown in fig. 1, in the present embodiment, a compensation chamber 24 is provided between the STG chamber 22 and the rear end cap 4; through the setting of volume compensation chamber, play the effect of volume compensation, also provide certain damping force for the shock absorber simultaneously.
As shown in fig. 1, in this embodiment, a single ear ring 1 for a shaft is disposed outside the main piston rod 2 for facilitating connection with a load.
The working principle is as follows: the invention forms the composite magnetic control-extrusion shock absorber with double special-shaped pistons by connecting the main piston part with high damping extrusion energy consumption and the auxiliary piston part with magneto-rheological effect in parallel. Under the excitation of an external environment, the main piston rod 2 drives the piston to move, when the earthquake displacement is small, the damping energy consumption performance is low, the special-shaped main piston A18 starts to work, the STG at the working gap between the special-shaped main piston A18 and the inner wall of the main cylinder body 23 generates a shear thickening effect, the special-shaped main piston A18 and the special-shaped main piston B21 mutually extrude the composite high-damping material layer to realize high-damping extrusion energy consumption along with the increase of the displacement, and the damping energy consumption performance is increased; when the earthquake displacement is large, the damping energy consumption performance reaches the maximum, the main piston part and the auxiliary piston part work together, after the auxiliary piston part is electrified, MRG at the working gap generates a magneto-rheological effect, the damping force can be increased, the special-shaped main piston extrudes the composite high-damping material layer, and the special-shaped main piston has a stronger high-damping extrusion energy consumption and vibration reduction effect. Through the setting of volume compensation chamber, play the effect of volume compensation, also provide certain damping force for the shock absorber simultaneously. And finally, the effects of high damping extrusion energy consumption and magnetic control vibration reduction of the vibration absorber can be realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The composite magnetic control extrusion shock absorber with double special-shaped pistons is characterized by comprising a main piston rod (2), an auxiliary cylinder body (16), a main cylinder body (23), an auxiliary piston part and a main piston part;
vice cylinder body (16) and main cylinder body (23) are connected through connecting cylinder cap (17), be equipped with MRG cavity (15) in vice cylinder body (16), be equipped with STG cavity (22) in main cylinder body (23), MRG cavity (15) are equipped with vice piston part, main cylinder body (23) are equipped with main piston part, main piston rod (2) pass in MRG cavity (15) extend to STG cavity (22), be equipped with vice piston rod (28) in STG cavity (22), vice piston rod (28) are connected with main piston rod (2).
2. The dual-profile piston compound magnetron extrusion shock absorber of claim 1, wherein the secondary piston part comprises profile half rings (13), a belleville spring (14), a secondary piston A (10), an excitation coil (9), a coil sleeve (7), a secondary piston C (12) and a secondary piston B (11), the profile half rings (13) are sleeved on the main piston rod (2), the secondary piston A (10) and the secondary piston B (11) are fixed between the profile half rings (13) through the belleville spring (14), the coil sleeve (7) is arranged between the secondary piston A (10) and the secondary piston B (11), the excitation coil (9) is connected with the coil sleeve (7), and the secondary piston C (12) is arranged between the secondary piston A (10) and the secondary piston B (11) and is connected with the main piston rod (2).
3. The dual magnetron extrusion shock absorber of special-shaped pistons in combination as set forth in claim 2, wherein the secondary piston A (10) and the secondary piston B (11) are externally provided with magnetic isolation copper sheets (6).
4. The dual profile piston compound magnetron extrusion shock absorber of claim 2, wherein the secondary piston a (10) and the secondary piston B (11) and the coil sleeve (7) are provided with O-ring seals a (8).
5. The dual contoured piston compound magnetron extrusion shock absorber of claim 1, wherein said main piston portion comprises a contoured main piston a (18), a high damping composite layer a (19), a contoured main piston B (21), and a high damping composite layer B (20); the special-shaped main piston A (18) is connected to the main piston rod (2), the special-shaped main piston B (21) and the auxiliary piston rod (28) are arranged, and the high-damping composite material layer A (19) and the high-damping composite material layer B (20) are arranged in the special-shaped main piston A (18) and on the main piston rod (2).
6. The dual-profiled piston compound magnetron extrusion shock absorber of claim 1, wherein the secondary piston rod (28) is connected with the rear end cover (4) through a bolt; the main cylinder body (23) is connected with the front end cover (3) and the rear end cover (4) through a draw bar bolt (25).
7. The dual magnetron extrusion damper of special-shaped pistons according to claim 6, characterized in that a Yx-shaped sealing ring (26) is arranged at the joint of the main piston rod (2) and the front end cover (3).
8. The dual magnetron extrusion shock absorber of special-shaped pistons in combination as set forth in claim 6, wherein O-ring seals B (27) are provided at the joint of the front end cover (3) and the sub-cylinder (16) and at the joint of the rear end cover (4) and the main cylinder (23).
9. A dual profiled piston compound magnetron extrusion shock absorber as claimed in claim 1 wherein a compensation chamber (24) is provided between the STG chamber (22) and the rear end cap (4).
10. The dual magnetron extrusion shock absorber of profiled pistons in pairs as set forth in claim 1, characterized in that the main piston rod (2) is externally provided with a single lug (1) for a shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146442.6A CN111042367A (en) | 2019-11-21 | 2019-11-21 | Composite magnetic control extrusion shock absorber with double special-shaped pistons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146442.6A CN111042367A (en) | 2019-11-21 | 2019-11-21 | Composite magnetic control extrusion shock absorber with double special-shaped pistons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111042367A true CN111042367A (en) | 2020-04-21 |
Family
ID=70232187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911146442.6A Pending CN111042367A (en) | 2019-11-21 | 2019-11-21 | Composite magnetic control extrusion shock absorber with double special-shaped pistons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111042367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855828A (en) * | 2020-12-30 | 2021-05-28 | 哈尔滨工业大学 | Shock-absorbing damper of high-pile wharf |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446325A (en) * | 2008-12-30 | 2009-06-03 | 河海大学 | Large-tonnage composite-structure magnetorheological damper |
| CN101446117A (en) * | 2008-12-30 | 2009-06-03 | 河海大学 | High-energy consumption self-decoupling magnetorheological damper |
| CN102562917A (en) * | 2012-01-20 | 2012-07-11 | 河海大学常州校区 | Main-control hydraulic damper |
| CN106760846A (en) * | 2016-12-16 | 2017-05-31 | 同济大学 | A kind of tandem type acceleration inertia sinker |
| CN108953462A (en) * | 2018-07-12 | 2018-12-07 | 河海大学常州校区 | A kind of in-line arrangement hydraulic damper |
| CN109707782A (en) * | 2019-01-15 | 2019-05-03 | 江苏大学 | A kind of magnetic-controlled damper having high frequency anti-impact energy dissipation behavior |
-
2019
- 2019-11-21 CN CN201911146442.6A patent/CN111042367A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446325A (en) * | 2008-12-30 | 2009-06-03 | 河海大学 | Large-tonnage composite-structure magnetorheological damper |
| CN101446117A (en) * | 2008-12-30 | 2009-06-03 | 河海大学 | High-energy consumption self-decoupling magnetorheological damper |
| CN102562917A (en) * | 2012-01-20 | 2012-07-11 | 河海大学常州校区 | Main-control hydraulic damper |
| CN106760846A (en) * | 2016-12-16 | 2017-05-31 | 同济大学 | A kind of tandem type acceleration inertia sinker |
| CN108953462A (en) * | 2018-07-12 | 2018-12-07 | 河海大学常州校区 | A kind of in-line arrangement hydraulic damper |
| CN109707782A (en) * | 2019-01-15 | 2019-05-03 | 江苏大学 | A kind of magnetic-controlled damper having high frequency anti-impact energy dissipation behavior |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855828A (en) * | 2020-12-30 | 2021-05-28 | 哈尔滨工业大学 | Shock-absorbing damper of high-pile wharf |
| CN112855828B (en) * | 2020-12-30 | 2022-07-15 | 哈尔滨工业大学 | Shock absorption damper for high-pile wharf |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11143265B2 (en) | SMA-STF based viscous damper | |
| CN109707782B (en) | Magnetic control damper with high-frequency anti-impact energy consumption characteristic | |
| CN103148157B (en) | Multistage squash type MR damper | |
| CN201843226U (en) | Variable-rigidity friction type energy-consumption damping device | |
| CN200958546Y (en) | Trigger-spacing passive damper with current controlling function | |
| CN204609033U (en) | Damper for building | |
| CN102296528A (en) | High-precision lock-up device (LUD) for multi-span bridges to resist earthquakes | |
| CN101446325A (en) | Large-tonnage composite-structure magnetorheological damper | |
| CN111042367A (en) | Composite magnetic control extrusion shock absorber with double special-shaped pistons | |
| CN104895253B (en) | Damping steel bar connector | |
| CN202273170U (en) | Multi-span bridge anti-seismic high-precision speed locker | |
| CN113483047A (en) | Stepped energy consumption viscous damper | |
| CN103640694A (en) | Hook arm of buffer load-shedding arresting hook | |
| CN104831870B (en) | Viscous damping steel connector | |
| CN111022421B (en) | Double-acting buffering hydraulic cylinder with external load absorption sleeve structure | |
| CN201925398U (en) | Large-stroke double-piston-rod viscous damper with elastic axial limit function | |
| CN110925348A (en) | Assembled pressure self-balancing magnetorheological damper | |
| CN216242009U (en) | Stepped energy consumption viscous damper | |
| CN105782322A (en) | High-stability piston structure for mechanical equipment damper | |
| CN210288378U (en) | Splicing unit for damping and energy consumption of anchor rod body and self-damping and energy consumption anchor rod | |
| CN108589800A (en) | A kind of basic anti-seismic structure of architectural engineering | |
| CN211624057U (en) | Elastic device and buffer with same | |
| CN111022556B (en) | Variable-rigidity extrusion energy dissipation shock absorber | |
| CN207830271U (en) | A kind of noise-reduction type hydraulic cylinder assembly with shock-absorbing function | |
| CN207514140U (en) | A kind of low noise gas spring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200421 |