WO2018194467A2 - Amortisseur rotatif utilisant un fluide pseudoplastique - Google Patents
Amortisseur rotatif utilisant un fluide pseudoplastique Download PDFInfo
- Publication number
- WO2018194467A2 WO2018194467A2 PCT/PA2018/000003 PA2018000003W WO2018194467A2 WO 2018194467 A2 WO2018194467 A2 WO 2018194467A2 PA 2018000003 W PA2018000003 W PA 2018000003W WO 2018194467 A2 WO2018194467 A2 WO 2018194467A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pseudoplastic
- fluid
- blades
- rotary
- shaft
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 38
- 239000007787 solid Substances 0.000 claims abstract description 6
- 230000035939 shock Effects 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 238000013016 damping Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 229920002261 Corn starch Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013017 mechanical damping Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/008—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters
Definitions
- the present invention relates to the field of rotary devices that use pseudoplastic fluids to provide controllable forces.
- the invention relates to the use of pseudoplastic fluids and the application of shear forces to said fluid to provide resistance to the movement of a set of perforated blades of a rotor inside a housing.
- Special attention has been given to the geometric design of the rotor blades, resulting in a curved shape that increases the contact area between the fluid and the blades and therefore increases the resistance.
- Known rotary dampers generally comprise a stator and a rotor that limit a chamber between them filled with a fluid, in particular a viscous fluid.
- Two or more blades are basically arranged radially in the rotor and there are means to provide communication between the chambers, for example holes, to allow the transfer of fluid from one chamber to the other when a relative rotation movement occurs between the rotor and the stator.
- the fluid flow through the holes or ducts induced by the relative rotation movement between the rotor and the stator provides the expected damping, as described in US7048098B1, US6899208B2 and US4768630A.
- a pseudoplastic fluid is a fluid whose viscosity increases with the rate of shear stress.
- Examples of industrially used pseudoplastic fluids are corn starch and water (ooblck), silica and polyethylene glycol. These liquids have been considered in shock absorption and energy vibration systems, pad brakes and liquid bulletproof vests.
- US Patent No. 4503952 to Hesse incorporates pseudoplastic fluids in a rotary damper.
- Staib US7959201 B2 patent consists of a gear damper used to control the movement of a device using a buffer fluid whose viscosity changes with acceleration.
- Seshimo US4759428 uses a dilating liquid (pseudoplastic) to create a linear viscoelastic buffer.
- the present invention is a rotary damper using pseudoplastic fluid with a relatively simple design that includes curved blades in order to provide a larger contact area, providing a greater damping effect. This results in a compact unit with a very high resistance.
- Figure 1 Shows a pictorial drawing and two sectional views of an embodiment of our invention having a solid axis.
- Figure 2 Shows a pictorial drawing and two sectional views of an embodiment of our invention that has a hollow shaft.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Orthopedic Medicine & Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Fluid-Damping Devices (AREA)
Abstract
L'invention concerne un dispositif compact qui offre un amortissement qui dépend de la vitesse de rotation utilisant des fluides pseudoplastiques et qui s'adapte facilement à différentes applications. Le dispositif comprend un rotor avec des pales perforées et incurvées reliées à un arbre solide ou creux qui se déplace à l'intérieur d'un logement rempli d'un fluide pseudoplastique. Le dispositif répond aux changements de vitesse dans l'arbre, fournissant ainsi un contôle de résistance variable pour l'amortisseur.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PA91505-01 | 2017-02-06 | ||
| PA9150501 | 2017-02-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2018194467A2 true WO2018194467A2 (fr) | 2018-10-25 |
| WO2018194467A3 WO2018194467A3 (fr) | 2019-01-31 |
Family
ID=63857112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/PA2018/000003 WO2018194467A2 (fr) | 2017-02-06 | 2018-01-30 | Amortisseur rotatif utilisant un fluide pseudoplastique |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2018194467A2 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7353923B2 (en) * | 2003-11-07 | 2008-04-08 | Nifco Inc. | Damper device |
| EP2021242B1 (fr) * | 2006-05-26 | 2011-04-20 | Lord Corporation | Amortisseur de trainee d'un aeronef a voilure tournante |
| US20090159382A1 (en) * | 2007-12-21 | 2009-06-25 | Louis Chemouni | Rotary damper |
| CN202579797U (zh) * | 2012-02-20 | 2012-12-05 | 东南大学 | 转动与轴动电流变体阻尼器 |
| US9841077B2 (en) * | 2014-06-18 | 2017-12-12 | Bell Helicopter Textron Inc. | Rotating shaft damping with electro-rheological fluid |
-
2018
- 2018-01-30 WO PCT/PA2018/000003 patent/WO2018194467A2/fr active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018194467A3 (fr) | 2019-01-31 |
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