WO2018194467A2 - Rotating damper using a pseudoplastic fluid - Google Patents
Rotating damper using a pseudoplastic fluid 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
The invention relates to a compact device that uses pseudoplastic fluids to provide damping according to the speed of rotation, which is easy to adapt to different applications. The device comprises a rotor with curved perforated blades connected to a solid or hollow shaft that moves inside a housing filled with a pseudoplastic fluid. The device responds to the changes of speed of the shaft, thereby providing a control of variable resistance for the damper.
Description
AMORTIGUADOR ROTATIVO USANDO UN FLUIDO PSEUDOPLÁSTICO ROTARY SHOCK ABSORBER USING A PSEUDOPLASTIC FLUID
CAMPO DE INVENCIÓN FIELD OF INVENTION
La presente invención se refiere al ámbito de los dispositivos rotativos que utilizan fluidos pseudoplásticos para proporcionar fuerzas controlables. La invención se refiere al uso de fluidos pseudoplásticos y la aplicación de esfuerzos de corte a dicho fluido para proporcionar resistencia al movimiento de un conjunto de aspas perforadas de un rotor en el interior de una carcasa. Se ha prestado especial atención al diseño geométrico de las aspas del rotor, resultando en una forma curva que aumenta el área de contacto entre el fluido y las aspas y por lo tanto aumenta la resistencia. 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.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
Los equipos rotativos se pueden utilizar como amortiguadores, frenos, embragues y similares, o para proporcionar fuerzas disipativas. Tales dispositivos basados en fluidos pseudoplásticos son particularmente de interés ya que pueden ofrecer una forma innovadora para lograr una absorción de energía de respuesta rápida, en combinación con adaptación automática a los requisitos de operación. Rotating equipment can be used as shock absorbers, brakes, clutches and the like, or to provide dissipative forces. Such devices based on pseudoplastic fluids are particularly of interest since they can offer an innovative way to achieve rapid response energy absorption, in combination with automatic adaptation to the requirements of operation.
Los amortiguadores rotativos conocidos comprenden, en general, un estator y un rotor que limitan una cámara entre ellos llena de un fluido, en particular un fluido viscoso. Dos o más aspas se disponen básicamente radialmente en el rotor y hay medios para proporcionar comunicación entre las cámaras, por ejemplo orificios, para permitir la transferencia de fluido desde una cámara a la otra cuando se produce un movimiento de rotación relativo entre el rotor y el estator. El flujo de fluido a través de los orificios o conductos inducido por el movimiento de rotación relativo entre el rotor y el estator proporciona la amortiguación esperada, como se describe en las patentes US7048098B1 , US6899208B2 and US4768630A. 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.
Un fluido pseudoplástico es un fluido cuya viscosidad aumenta con la tasa del esfuerzo de corte. Ejemplos de fluidos pseudoplásticos utilizados industrialmente son el almidón de maíz y agua (ooblck), sílice y polietilenglicol. Estos líquidos se han considerado en los sistemas de absorción de choque y la vibración de la energía, frenos de pastilla y chalecos antibalas líquidos. 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.
Existen varias patentes que incorporan fluidos pseudoplásticos, principalmente en aplicaciones de amortiguación mecánica. Por ejemplo, la patente US4503952 de Hesse incorpora fluidos pseudoplásticos en un amortiguador rotativo. La patente US7959201 B2 de Staib consiste de un amortiguador de engranaje utilizado para controlar el movimiento de un dispositivo que usa un fluido amortiguador cuya viscosidad cambia con la aceleración. Además, la patente US4759428 de Seshimo utiliza un líquido dilatante (pseudoplástico) para crear un amortiguador lineal viscoelástico.
La presente invención es un amortiguador rotativo usando fluido pseudplástico con un diseño relativamente simple que incluye aspas curvadas con el fin de proporcionar un área de contacto más grande, proporcionando un mayor efecto de amortiguación. Esto se traduce en una unidad compacta con una resistencia muy alta. There are several patents that incorporate pseudoplastic fluids, mainly in mechanical damping applications. For example, 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. In addition, 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.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
El objetivo principal de la presente invención es proporcionar amortiguación de rotación dependiente de la velocidad usando fluidos pseudoplásticos con un dispositivo compacto, fácilmente adaptable a diferentes aplicaciones. La invención consigue este objetivo utilizando aspas curvadas perforadas fijadas a un eje giratorio que se mueven dentro de un alojamiento lleno de un fluido pseudoplástico cuya resistencia al movimiento de las aspas cambia con la tasa de velocidad de rotación. The main objective of the present invention is to provide speed-dependent rotation damping using pseudoplastic fluids with a compact device, easily adaptable to different applications. The invention achieves this objective by using perforated curved blades fixed to a rotating shaft that move within a housing filled with a pseudoplastic fluid whose resistance to the movement of the blades changes with the rate of rotation speed.
El dispositivo de acuerdo con la presente invención se compone de una carcasa dentro de la cual se mueve un rotor. Tal rotor tiene aspas curvas perforadas fijadas a un eje giratorio, sólido o hueco, y se mueven en contra de un fluido pseudoplástico con el que se llena el dispositivo. La viscosidad del fluido pseudoplástico aumenta o disminuye la resistencia al movimiento de las aspas cuando el eje acelera o desacelera, cambiando así efectivamente el par mecánico en el eje que el dispositivo presentará a la carga o al generador de fuerza motriz al que está conectado. Esto proporciona una respuesta de par resistivo dependiente de la velocidad del amortiguador rotativo. The device according to the present invention is comprised of a housing within which a rotor moves. Such a rotor has perforated curved blades fixed to a rotating shaft, solid or hollow, and they move against a pseudoplastic fluid with which the device is filled. The viscosity of the pseudoplastic fluid increases or decreases the resistance to the movement of the blades when the shaft accelerates or decelerates, thus effectively changing the mechanical torque on the shaft that the device will present to the load or the driving force generator to which it is connected. This provides a resistive torque response dependent on the speed of the rotary damper.
DESCRIPCIÓN DE LAS FIGURAS DESCRIPTION OF THE FIGURES
Figura 1. Muestra un dibujo pictórico y dos vistas en sección de una realización de nuestra invención que tiene un eje macizo. Figure 1. Shows a pictorial drawing and two sectional views of an embodiment of our invention having a solid axis.
Figura 2. Muestra un dibujo pictórico y dos vistas en sección de una realización de nuestra invención que tiene un eje hueco. Figure 2. Shows a pictorial drawing and two sectional views of an embodiment of our invention that has a hollow shaft.
DESCRIPCIÓN DETALLADA DE LAS FIGURAS DETAILED DESCRIPTION OF THE FIGURES
Tal como se describe a continuación, las siguientes figuras muestran varias realizaciones posibles de un amortiguador rotativo que usa un fluido pseudoplástico. Los dibujos están destinados a demostrar la funcionalidad de un dispositivo de este tipo y sus componentes principales. Sin embargo, estas imágenes no están a escala. Los varios tamaños y formas del dispositivo se pueden determinar, en base a los requisitos específicos de potencia de salida de la aplicación y los materiales y las tecnologías de fluidos pseudoplástico disponibles. Aun así, los dibujos son lo suficientemente claros para establecer el concepto de funcionamiento y la metodología As described below, the following figures show several possible embodiments of a rotary damper using a pseudoplastic fluid. The drawings are intended to demonstrate the functionality of such a device and its main components. However, these images are not to scale. The various sizes and shapes of the device can be determined, based on the specific output power requirements of the application and the available pseudoplastic fluid materials and technologies. Even so, the drawings are clear enough to establish the concept of operation and methodology.
Figura 1 incluye un dibujo en perspectiva de una posible realización de la presente invención que tiene un eje sólido, así como dos vistas en sección de tal realización. La invención consiste en una carcasa 1 dentro de la cual un eje de rotación sólico 2 se
mueve. Las aspas perforadas curvadas 3 están conectados al eje sólido 2, y se mueven a través del fluido pseudoplástico 4 produciendo un par resistente debido a la curvatura de las aspas 3 y a el fluido que se mueve a través de las perforaciones en ellas. El par producido en el eje 2 es el efecto del cambio en el esfuerzo de corte percibido por el fluido debido al movimiento de las aspas perforadas 3. Figure 1 includes a perspective drawing of a possible embodiment of the present invention having a solid axis, as well as two sectional views of such an embodiment. The invention consists of a housing 1 within which a shaft of rotation 2 is move The curved perforated blades 3 are connected to the solid axis 2, and move through the pseudoplastic fluid 4 producing a sturdy torque due to the curvature of the blades 3 and the fluid that moves through the perforations therein. The torque produced on axis 2 is the effect of the change in the shear stress perceived by the fluid due to the movement of the perforated blades 3.
Figura 2 incluye un dibujo en perspectiva de una posible realización de nuestra invención, que tiene un eje hueco, así como dos vistas en sección de tal realización. La invención consiste en un alojamiento 5 en el interior del cual un eje rotativo hueco 6 se mueve. Las cuchillas perforadas curvadas 7 están conectados al eje hueco 6, y se mueven a través del fluido pseudoplástico 8 produciendo un par resistente debido a la curvatura de las aspas 7 y a el fluido que se mueve a través de las perforaciones en ellos. El par producido en el eje 6 es el efecto del cambio en el esfuerzo de corte percibido por el fluido debido al movimiento de las aspas perforadas 7.
Figure 2 includes a perspective drawing of a possible embodiment of our invention, which has a hollow shaft, as well as two sectional views of such an embodiment. The invention consists of a housing 5 inside which a hollow rotating shaft 6 moves. The curved perforated blades 7 are connected to the hollow shaft 6, and move through the pseudoplastic fluid 8 producing a sturdy torque due to the curvature of the blades 7 and the fluid that moves through the perforations therein. The torque produced on axis 6 is the effect of the change in the shear stress perceived by the fluid due to the movement of the perforated blades 7.
Claims
1. Amortiguador rotativo controlado mediante fluidos pseudoplasticos que comprende: una carcasa, un eje rotativo vinculado al centro geométrico de la carcasa, un elemento giratorio vinculado perimetralmente a la superficie exterior del eje rotativo, y un fluido pseudoplástico dispuesto en el interior de la carcasa rodeando al conjunto formado por el eje y el elemento giratorio. 1. Rotary shock absorber controlled by pseudoplastic fluids comprising: a housing, a rotating shaft linked to the geometric center of the housing, a rotating element perimetrically linked to the outer surface of the rotating shaft, and a pseudoplastic fluid disposed inside the housing surrounding to the assembly formed by the shaft and the rotating element.
2. Amortiguador rotativo controlado mediante fluidos pseudoplasticos de acuerdo con la reivindicación 1 caracterizado porque el elemento giratorio es una pluralidad de aspas curvadas perforadas. 2. Rotary damper controlled by pseudoplastic fluids according to claim 1 characterized in that the rotating element is a plurality of perforated curved blades.
3. Amortiguador rotativo controlado mediante fluidos pseudoplasticos de acuerdo con la reivindicación 1 caracterizado porque elemento giratorio es una pluralidad de cuchillas perforadas curvadas. 3. Rotary shock absorber controlled by pseudoplastic fluids according to claim 1 characterized in that the rotating element is a plurality of curved perforated blades.
4. Amortiguador rotacional controlado mediante fluidos inteligentes de acuerdo con la reivindicación 1 caracterizado porque el eje rotativo es un eje sólido. 4. Rotational damper controlled by intelligent fluids according to claim 1 characterized in that the rotary axis is a solid axis.
5. Amortiguador rotacional controlado mediante fluidos inteligentes de acuerdo con la reivindicación 1 caracterizado porque el eje rotativo es un eje hueco.
5. Rotational damper controlled by intelligent fluids according to claim 1 characterized in that the rotary axis is a hollow axis.
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 (en) | 2018-10-25 |
| WO2018194467A3 WO2018194467A3 (en) | 2019-01-31 |
Family
ID=63857112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/PA2018/000003 WO2018194467A2 (en) | 2017-02-06 | 2018-01-30 | Rotating damper using a pseudoplastic fluid |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2018194467A2 (en) |
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 (en) * | 2006-05-26 | 2011-04-20 | Lord Corporation | Rotary wing aircraft rotary lead lag damper |
| US20090159382A1 (en) * | 2007-12-21 | 2009-06-25 | Louis Chemouni | Rotary damper |
| CN202579797U (en) * | 2012-02-20 | 2012-12-05 | 东南大学 | Rotary and shaft-driving electrorheological fluid damper |
| 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/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018194467A3 (en) | 2019-01-31 |
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