WO2017203080A1 - Protector for rotary shaft of railway vehicles - Google Patents

Protector for rotary shaft of railway vehicles Download PDF

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Publication number
WO2017203080A1
WO2017203080A1 PCT/ES2017/070338 ES2017070338W WO2017203080A1 WO 2017203080 A1 WO2017203080 A1 WO 2017203080A1 ES 2017070338 W ES2017070338 W ES 2017070338W WO 2017203080 A1 WO2017203080 A1 WO 2017203080A1
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WO
WIPO (PCT)
Prior art keywords
semi
protector
bushes
railway vehicles
rolling axis
Prior art date
Application number
PCT/ES2017/070338
Other languages
Spanish (es)
French (fr)
Inventor
José Aitor LANDABEREA RODRÍGUEZ
Manuel AZAROLA IBEROAGA
Original Assignee
Construcciones Y Auxiliar De Ferrocarriles, S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Construcciones Y Auxiliar De Ferrocarriles, S.A. filed Critical Construcciones Y Auxiliar De Ferrocarriles, S.A.
Publication of WO2017203080A1 publication Critical patent/WO2017203080A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/50—Other details

Definitions

  • the present invention is related to the protection of the rolling axles of railway vehicles in due conditions so that they adequately fulfill their function without losing security from external aggressions, proposing a protector that is very effective to efficiently maintain the safety conditions of said axles. in rail vehicles.
  • a layer (about 200 microns thick) of a protective paint against atmospheric conditions is usually applied on the external surface of the rolling axles of the railway vehicles, to prevent corrosion of the axles.
  • the rolling axes may suffer impacts from external elements, such as road ballast stones, ice chips, etc., which can generate marks on the surface of the axes. These marks produce local concentrations of the tensions and can cause the appearance of cracks on the shaft due to fatigue efforts, which, in turn, could spread to cause the component to break, a failure with potentially catastrophic consequences.
  • the rolling shafts are manufactured with a very low surface roughness to meet fatigue resistance characteristics.
  • the low surface roughness in turn negatively affects the adhesion of the paints applied on the axes, as has been verified with the information obtained from the axes in service. This problem is more pronounced in the thick layer protections motivated, among other reasons, by the difficulty of the application process and the inertial effects when rotating at high frequency during the service.
  • the lack of adhesion and separation or even the detachment of part of the paint can lead to oxidation of the shaft when it comes into contact with moisture and / or environmental elements.
  • Another solution that is also known to protect the rolling axles of railway vehicles, with the same purpose of resisting impacts, is based on covering the axles with an elastomer band, which is arranged on the surface of the axle, holding said band of elastomer by means of bushings, as described, for example, in WO0059764.
  • This solution has the disadvantage that the band of The elastomer is arranged covering the entire surface of the tread, whereby the moisture that may enter between the elastomer band and the shaft is retained inside, favoring the oxidation of the axle and, consequently, its deterioration.
  • Document ES2399383 discloses, in the same sense, another protection solution for the rolling axles of railway vehicles, using two semi-bushings that are arranged around the rolling axis, said semi-bushings having ribs in their inner part. prominent in the circumferential direction and perpendicular to the longitudinal direction of the rolling axis, said channels being defined between channels that allow the evacuation of moisture.
  • the raceway can also be protected against corrosion by a layer of low-thickness paint on which the bushes rest through contact with the internal ribs.
  • the contact surface of the ribs is very small which results in high pressures acting on the paint applied against corrosion.
  • this solution is also of high cost, since specific semi-bushings are needed that adapt to the geometry of each raceway that is required to be protected and, consequently, a mold determined for the manufacture thereof. , as well as a mechanization of adaptation of the semi-bushes.
  • a protector for the rolling axles of railway vehicles is proposed, with which the fulfillment of said function is achieved in a more effective and practical way than with conventional solutions.
  • the tread shaft protector of the invention comprises two semi-cylindrical body semi-bushings that are joined together surrounding the raceway on its outside, with elastomer strips extending in the inner part of said semi-bushings extending in the direction longitudinal, that is to say in a direction parallel to the rolling axis, going Said elastomer strips incorporated in a false manner over the semi-bushings, with the possibility of being exchanged, so that by incorporating elastomer strips of different thicknesses, the protector can be adapted to axes of different diameters, which saves cost of molds for manufacturing semi-bushes for application to shafts of different diameters.
  • a variable number of elastomer strips can be incorporated into each semi-bushing, with at least three strips distributed on the inner surface of each semi-bushing and preferably four being provided, with which achieves an effective contact on the surface of the raceways, with a reduced amount of elastomer, which results in a low cost of the protector.
  • the elastomer strips are arranged separated and parallel to each other, extending longitudinally along the semi-bushings except in some areas at the ends thereof, where the body of the semi-bushings defines a widening of its diameter towards the Exterior. In this way, the elastomer strips do not cover the entire length of the inner surface of the semi-bushings, but the defined area between the elastomer strips and the defined area at the ends of the semi- are left uncovered. bushes, where the body of the semi-bushes defines the widening of its diameter towards the outside, thus favoring the evacuation of moisture through said ends of the bushes.
  • the semi-bushings are also provided with prominent tabs at the ends and at the longitudinal edges, whereby between the two semi-bushings that join to form the protector around the rolling axis, as well as between the adjacent semi-bushings of consecutive protectors that are arranged along the rolling axis, there are some open spaces that make drains for the exit of moisture to the outside.
  • the use of elastomer strips in the longitudinal direction of the semi-bushings in the assembly, parallel to the rolling axis, reduces the pressure exerted on the paint layer that can be applied on the shaft to prevent oxidation, since the stresses derived from the assembly and the dynamic loads in service are distributed throughout the entire contact surface.
  • the elastomer strips are flexible and of a relatively soft material, they are more efficient in transmitting the vibrations generated during the circulation on the contact surface with the shaft. Thanks to this arrangement improves the behavior against corrosion of the shaft since the paint layer does not deteriorate in service.
  • the protector object of the invention results in characteristics that make it advantageous for the function to which it is intended, acquiring its own life and preferential character with respect to conventional solutions of the same application.
  • Figure 1 shows in perspective an embodiment of a semi-bushing for a railway vehicle axle protector, according to the invention.
  • Figure 2 is a front view from one end of the semi-bushing of the previous figure.
  • Figure 3 is a corresponding view from the inside of the semi-bushing.
  • Figure 4 shows a shaft guard formed with two semi-bushings, according to the invention.
  • Figure 5 is a cross-sectional view of the protector disposed on an application axis.
  • Figure 6 is a perspective of the arrangement of a protector on an axis.
  • Figure 7 is a perspective of the arrangement of a succession of consecutive protectors along an axis.
  • Figure 8 is an example of an arrangement of an elastomer strip fixed by fit in the body of a semi-bushing of the protector of the invention.
  • Figure 9 is another example of the arrangement of an elastomer strip fixed on an accessory piece embedded in the body of a semi-bushing of the protector of the invention.
  • the object of the invention relates to a protector for vehicle rolling shafts (1) railway, in order to avoid that the impacts of stones or other objects during the circulation of the corresponding vehicle can deteriorate the axle (1).
  • the protector comprises two semi-bushes (2) that join together to form a cover around the shaft (1) to be protected, as shown in Figure 5, where each semi-bushing (2) has a semi-cylindrical body (3), on which are incorporated in the inner part strips of elastomer (4) arranged in a longitudinal direction, that is to say in the direction (d) parallel to the axis (1), as seen in figure 1.
  • each semi-bushing ( 2) the number of elastomer strips (4) can be variable, with at least three elastomer strips (4) being provided to ensure adequate support on the shaft (1), and preferably four, as shown in the figures , said elastomer strips (4) being in addition to variable thicknesses, to adapt the application to shafts (1) of different diameters, with the same semi-cylindrical body (3) of the half-sleeves (2).
  • the elastomer strips (4) can be arranged directly on the inner surface of the semi-bushes (2), fixed with adhesive or any other conventional bonding means; but they can also be attached by fittings in housings (5) defined in the inner part of the semi-cylindrical body (3) of the semi-bushes (2), as shown in Figure 8; or they can be fixed by gluing or any conventional means, on false pieces (6) embedded in dovetails (7) or any other type of fit defined in the inner part of the semi-cylindrical body (3) of the semi-bushes (2 ), as shown in Figure 9.
  • the elastomer strips (4) are arranged inside the semi-bushes (2) separated and parallel to each other, and extend partially covering the length of the semi-bushes (2) except in one area (8) of each end thereof, defining the body (3) of the semi-bushes (2) in said extreme areas (8) a widening of its diameter to the outside, where the moisture that can occur inside is removed to the outside of the semi-bushes (2).
  • the body (3) of the semi-bushes (2) has tabs (9, 10), so that in the coupling of the two semi-bushes (2) protector components covering around an axis (1), the tabs (9) of the longitudinal edges make open spaces between the bodies (3) of the semi-bushes (2), through which moisture can also escape outside.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention relates to a protector for a rotary shaft of railway vehicles, comprising two semi-shells (2) having a semi-cylindrical body (3) which are joined to one another surrounding the rotary shaft (1) on the outside, wherein each semi-shell (2) has detachable elastomer strips (4) inside, disposed in a longitudinal direction in parallel to the rotary shaft (1), partially covering the inside of the semi-shells (2).

Description

DESCRIPCIÓN  DESCRIPTION
PROTECTOR DE EJE DE RODADURA DE VEHÍCULOS FERROVIARIOS Sector de la técnica RAILWAY BEARING SHAFT PROTECTOR
La presente invención está relacionada con la protección de los ejes de rodadura de vehículos ferroviarios en debidas condiciones para que cumplan adecuadamente su función sin perder seguridad por agresiones externas, proponiendo un protector que resulta muy eficaz para mantener con eficiencia las condiciones de seguridad de dichos ejes en los vehículos ferroviarios. The present invention is related to the protection of the rolling axles of railway vehicles in due conditions so that they adequately fulfill their function without losing security from external aggressions, proposing a protector that is very effective to efficiently maintain the safety conditions of said axles. in rail vehicles.
Estado de la técnica Los ejes de rodadura de vehículos ferroviarios, al igual que las propias ruedas, son componentes críticos en la seguridad de la circulación ferroviaria, por lo que se debe garantizar que las características estructurales de dichos ejes se mantengan sin un detrimento acusado durante su uso protegiéndolos contra las agresiones de elementos externos. State of the art The rolling axles of railway vehicles, as well as the wheels themselves, are critical components in the safety of railway traffic, so it must be ensured that the structural characteristics of said axles are maintained without a detriment charged during its use protecting them against the aggressions of external elements.
Para ello, en la superficie externa de los ejes de rodadura de los vehículos ferroviarios se suele aplicar una capa (de unas 200 mieras de espesor) de una pintura de protección contra las condiciones atmosféricas, para evitar la corrosión de los ejes. Por otro lado, durante la circulación de los vehículos ferroviarios, especialmente a alta velocidad (más de 200 Km/h), los ejes de rodadura pueden sufrir impactos de elementos externos, como por ejemplo piedras de balasto de la vía, trozos de hielo, etc., que pueden generar marcas en la superficie de los ejes. Estas marcas producen concentraciones locales de las tensiones pudiendo originar la aparición de grietas sobre el eje debidas a los esfuerzos de fatiga, las cuales, a su vez, podrían propagarse hasta provocar la rotura del componente, un fallo con consecuencias potencialmente catastróficas. To do this, a layer (about 200 microns thick) of a protective paint against atmospheric conditions is usually applied on the external surface of the rolling axles of the railway vehicles, to prevent corrosion of the axles. On the other hand, during the circulation of railway vehicles, especially at high speed (more than 200 km / h), the rolling axes may suffer impacts from external elements, such as road ballast stones, ice chips, etc., which can generate marks on the surface of the axes. These marks produce local concentrations of the tensions and can cause the appearance of cracks on the shaft due to fatigue efforts, which, in turn, could spread to cause the component to break, a failure with potentially catastrophic consequences.
Con el fin de proteger a los ejes de los daños por impactos, es una práctica habitual recubrir el eje con una capa gruesa de pintura de entre 6 y 8 mm de espesor. Es conveniente señalar que los ejes de rodadura se diseñan para durar la vida completa del vehículo ferroviario. Para garantizar la integridad estructural de los ejes de rodadura en servicio, estos componentes se someten a inspecciones periódicas a lo largo de su vida según las indicaciones definidas en las operaciones de mantenimiento. Así, por ejemplo, es habitual realizar inspecciones visuales frecuentes al objeto de comprobar la condición general del eje, poniendo especial atención al estado de las protecciones y de la superficie del eje. En el caso de encontrar algún daño en la capa de protección del eje, una vez comprobado que el propio eje no está afectado, se procede a reparar localmente el recubrimiento. Estas reparaciones son más laboriosas y costosas a medida que aumenta el espesor de la capa, como es el caso de protecciones contra impactos. Por otro lado, durante la gran revisión donde se sustituyen las ruedas por haber alcanzado el límite de vida, normalmente se aprovecha para hacer una inspección a fondo de los ejes de rodadura como medida preventiva para mantenerlos en servicio. Para ello, primeramente es necesario retirar el recubrimiento de la superficie y, posteriormente, tras comprobar la ausencia de defectos y grietas, se vuelve a aplicar la protección sobre el eje. En el caso de las pinturas de capa gruesa empleadas para resistir los impactos, estas tareas son complejas conllevando un elevado coste de material y tiempo de operación. In order to protect the axes from impact damage, it is common practice to coat the shaft with a thick layer of paint between 6 and 8 mm thick. It should be noted that the raceways are designed to last the entire life of the rail vehicle. To guarantee the structural integrity of the running axles in service, these components undergo periodic inspections throughout their life according to the indications defined in the maintenance operations. Thus, for example, it is usual to carry out frequent visual inspections in order to check the general condition of the axle, paying special attention to the state of the protections and the surface of the axle. In case of finding any damage to the shaft protection layer, once it has been verified that the shaft itself is not affected, the coating is repaired locally. These repairs are more laborious and expensive as the thickness of the layer increases, as is the case with impact protection. On the other hand, during the great revision where the wheels are replaced by having reached the life limit, it is normally used to make a thorough inspection of the treadmills as a preventive measure to keep them in service. To do this, it is first necessary to remove the surface coating and, after checking the absence of defects and cracks, the protection on the shaft is reapplied. In the case of thick coat paints used to resist impacts, these tasks are complex, leading to a high cost of material and operating time.
Es conocido que la rugosidad superficial de un componente influye en la resistencia a fatiga ante esfuerzos dinámicos actuantes, de manera que esta resistencia es menor cuanto mayor sea dicha rugosidad. Por ello, los ejes de rodadura se fabrican con una rugosidad superficial muy baja para cumplir con las características de resistencia a la fatiga. Sin embargo, la rugosidad baja de la superficie a su vez afecta negativamente a la adherencia de las pinturas aplicadas sobre los ejes, tal y como se ha comprobado con la información obtenida a partir de los ejes en servicio. Este problema es más acusado en las protecciones de capa gruesa motivado, entre otras razones, por la dificultad del proceso de aplicación y por los efectos inerciales al rotar a alta frecuencia durante el servicio. La falta de adherencia y la separación o incluso el desprendimiento de parte de la pintura puede dar lugar a la oxidación del eje al entrar en contacto con la humedad y/o elementos ambientales. It is known that the surface roughness of a component influences fatigue resistance to dynamic acting forces, so that this resistance is lower the greater said roughness. Therefore, the rolling shafts are manufactured with a very low surface roughness to meet fatigue resistance characteristics. However, the low surface roughness in turn negatively affects the adhesion of the paints applied on the axes, as has been verified with the information obtained from the axes in service. This problem is more pronounced in the thick layer protections motivated, among other reasons, by the difficulty of the application process and the inertial effects when rotating at high frequency during the service. The lack of adhesion and separation or even the detachment of part of the paint can lead to oxidation of the shaft when it comes into contact with moisture and / or environmental elements.
Otra solución que también es conocida para proteger los ejes de rodadura de vehículos ferroviarios, con la misma finalidad de resistir impactos, se basa en cubrir los ejes con una banda de elastómero, la cual se dispone sobre la superficie del eje, sujetándose dicha banda de elastómero mediante unos casquillos, tal como describe, por ejemplo, el documento WO0059764. Esta solución tiene el inconveniente de que la banda de elastómero se dispone cubriendo toda la superficie del eje de rodadura, con lo cual la humedad que pueda entrar entre la banda de elastómero y el eje queda retenida en el interior, favoreciendo la oxidación del eje y, como consecuencia, el deterioro del mismo. El documento ES2399383 da a conocer, en el mismo sentido, otra solución de protección de los ejes de rodadura de vehículos ferroviarios, utilizando dos semi-casquillos que se disponen rodeando al eje de rodadura, poseyendo dichos semi-casquillos en su parte interior unos nervios prominentes en dirección circunferencial y perpendicular a la dirección longitudinal del eje de rodadura, definiéndose entre dichos nervios unos canales que permiten la evacuación de la humedad. Another solution that is also known to protect the rolling axles of railway vehicles, with the same purpose of resisting impacts, is based on covering the axles with an elastomer band, which is arranged on the surface of the axle, holding said band of elastomer by means of bushings, as described, for example, in WO0059764. This solution has the disadvantage that the band of The elastomer is arranged covering the entire surface of the tread, whereby the moisture that may enter between the elastomer band and the shaft is retained inside, favoring the oxidation of the axle and, consequently, its deterioration. Document ES2399383 discloses, in the same sense, another protection solution for the rolling axles of railway vehicles, using two semi-bushings that are arranged around the rolling axis, said semi-bushings having ribs in their inner part. prominent in the circumferential direction and perpendicular to the longitudinal direction of the rolling axis, said channels being defined between channels that allow the evacuation of moisture.
En esta solución, el eje de rodadura también se puede proteger contra la corrosión mediante una capa de pintura de bajo espesor sobre la que apoyan los casquillos a través del contacto con los nervios internos. La superficie de contacto de los nervios es muy pequeña lo cual da lugar a elevadas presiones actuando sobre la pintura aplicada contra la corrosión. Estas presiones altas combinadas con las vibraciones originadas durante la circulación del vehículo ferroviario pueden llegar a deteriorar la pintura en la zona de contacto favoreciendo la oxidación del eje y, por consiguiente, afectando a su integridad y a la seguridad del servicio. In this solution, the raceway can also be protected against corrosion by a layer of low-thickness paint on which the bushes rest through contact with the internal ribs. The contact surface of the ribs is very small which results in high pressures acting on the paint applied against corrosion. These high pressures combined with the vibrations caused during the circulation of the railway vehicle can deteriorate the paint in the contact area favoring the oxidation of the axle and, consequently, affecting its integrity and the safety of the service.
Por otro lado, esta solución resulta también de elevado coste, ya que se necesitan unos semi-casquillos específicos que se adapten a la geometría de cada eje de rodadura que se requiera proteger y, por consiguiente, un molde determinado para la fabricación de los mismos, así como una mecanización de adaptación de los semi-casquillos. On the other hand, this solution is also of high cost, since specific semi-bushings are needed that adapt to the geometry of each raceway that is required to be protected and, consequently, a mold determined for the manufacture thereof. , as well as a mechanization of adaptation of the semi-bushes.
Objeto de la invención Object of the invention
De acuerdo con la invención se propone un protector para los ejes de rodadura de vehículos ferroviarios, con el cual se logra el cumplimiento de dicha función de una manera más efectiva y práctica que con las soluciones convencionales. In accordance with the invention, a protector for the rolling axles of railway vehicles is proposed, with which the fulfillment of said function is achieved in a more effective and practical way than with conventional solutions.
El protector de eje de rodadura de la invención comprende dos semi-casquillos de cuerpo semicilíndrico que se unen entre sí rodeando el eje de rodadura por su exterior, disponiéndose en la parte interior de dichos semi-casquillos unas tiras de elastómero que se extienden en sentido longitudinal, es decir en dirección paralela al eje de rodadura, yendo dichas tiras de elastómero incorporadas de manera postiza sobre los semi-casquillos, con posibilidad de ser intercambiadas, de modo que incorporando tiras de elastómero de diferente grosor se puede adaptar el protector a ejes de distintos diámetros, con lo cual se consigue un ahorro en costo de moldes de fabricación de los semi-casquillos para la aplicación a ejes de distintos diámetros. The tread shaft protector of the invention comprises two semi-cylindrical body semi-bushings that are joined together surrounding the raceway on its outside, with elastomer strips extending in the inner part of said semi-bushings extending in the direction longitudinal, that is to say in a direction parallel to the rolling axis, going Said elastomer strips incorporated in a false manner over the semi-bushings, with the possibility of being exchanged, so that by incorporating elastomer strips of different thicknesses, the protector can be adapted to axes of different diameters, which saves cost of molds for manufacturing semi-bushes for application to shafts of different diameters.
Para la función a desarrollar sobre los ejes de rodadura, en cada semi-casquillo pueden incorporarse un número variable de tiras de elastómero, estando previsto que sean al menos tres tiras distribuidas en la superficie interior de cada semi-casquillo y preferentemente cuatro, con lo cual se logra un contacto efectivo sobre la superficie de los ejes de rodadura, con una cantidad de elastómero reducida, lo cual repercute en un bajo coste del protector. For the function to be developed on the raceways, a variable number of elastomer strips can be incorporated into each semi-bushing, with at least three strips distributed on the inner surface of each semi-bushing and preferably four being provided, with which achieves an effective contact on the surface of the raceways, with a reduced amount of elastomer, which results in a low cost of the protector.
Las tiras de elastómero se disponen separadas y paralelas entre sí, extendiéndose longitudinalmente a lo largo de los semi-casquillos salvo en unas zonas en los extremos de los mismos, en donde el cuerpo de los semi-casquillos define unos ensanchamientos de su diámetro hacia el exterior. De esta manera, las tiras de elastómero no llegan a cubrir toda la longitud de la superficie interior de los semi-casquillos, sino que se deja sin cubrir la zona definida entre las tiras de elastómero y la zona definida en los extremos de los semi- casquillos, en donde el cuerpo de los semi-casquillos define el ensanchamiento de su diámetro hacia el exterior, favoreciéndose de esta manera la evacuación de la humedad por dichos extremos de los semi-casquillos. The elastomer strips are arranged separated and parallel to each other, extending longitudinally along the semi-bushings except in some areas at the ends thereof, where the body of the semi-bushings defines a widening of its diameter towards the Exterior. In this way, the elastomer strips do not cover the entire length of the inner surface of the semi-bushings, but the defined area between the elastomer strips and the defined area at the ends of the semi- are left uncovered. bushes, where the body of the semi-bushes defines the widening of its diameter towards the outside, thus favoring the evacuation of moisture through said ends of the bushes.
Los semi-casquillos se prevén además con unas pestañas prominentes en los extremos y en los bordes longitudinales, con lo cual entre los dos semi-casquillos que se unen para formar el protector alrededor del eje de rodadura, así como entre los semi-casquillos contiguos de protectores consecutivos que se dispongan a lo largo del eje de rodadura, quedan unos espacios abiertos que hacen de drenajes para la salida de la humedad al exterior. The semi-bushings are also provided with prominent tabs at the ends and at the longitudinal edges, whereby between the two semi-bushings that join to form the protector around the rolling axis, as well as between the adjacent semi-bushings of consecutive protectors that are arranged along the rolling axis, there are some open spaces that make drains for the exit of moisture to the outside.
Por otro lado, la utilización de tiras de elastómero en el sentido longitudinal de los semi- casquillos en el montaje, paralelamente al eje de rodadura, reduce la presión ejercida sobre la capa de pintura que se puede aplicar sobre el eje para evitar su oxidación, ya que los esfuerzos derivados del montaje y de las cargas dinámicas en servicio se reparten a lo largo de toda la superficie de contacto. Además, como las tiras de elastómero son flexibles y de un material relativamente blando, son más eficientes a la hora de transmitir las vibraciones generadas durante la circulación sobre la superficie de contacto con el eje. Gracias a esta disposición se mejora el comportamiento frente a la corrosión del eje ya que la capa de pintura no se deteriora en servicio. On the other hand, the use of elastomer strips in the longitudinal direction of the semi-bushings in the assembly, parallel to the rolling axis, reduces the pressure exerted on the paint layer that can be applied on the shaft to prevent oxidation, since the stresses derived from the assembly and the dynamic loads in service are distributed throughout the entire contact surface. In addition, since the elastomer strips are flexible and of a relatively soft material, they are more efficient in transmitting the vibrations generated during the circulation on the contact surface with the shaft. Thanks to this arrangement improves the behavior against corrosion of the shaft since the paint layer does not deteriorate in service.
Por todo ello, el protector objeto de la invención resulta de unas características que le hacen ventajoso para la función a la que está destinado, adquiriendo vida propia y carácter preferente respecto de las soluciones convencionales de la misma aplicación. Therefore, the protector object of the invention results in characteristics that make it advantageous for the function to which it is intended, acquiring its own life and preferential character with respect to conventional solutions of the same application.
Descripción de las figuras La figura 1 muestra en perspectiva un ejemplo de realización de un semi-casquillo para un protector de eje de vehículo ferroviario, según la invención. Description of the figures Figure 1 shows in perspective an embodiment of a semi-bushing for a railway vehicle axle protector, according to the invention.
La figura 2 es una vista frontal desde un extremo del semi-casquillo de la figura anterior. La figura 3 es una correspondiente vista por la parte interior del semi-casquillo. Figure 2 is a front view from one end of the semi-bushing of the previous figure. Figure 3 is a corresponding view from the inside of the semi-bushing.
La figura 4 muestra un protector de eje formado con dos semi-casquillos, según la invención. Figure 4 shows a shaft guard formed with two semi-bushings, according to the invention.
La figura 5 es una vista en sección transversal del protector dispuesto sobre un eje de aplicación. Figure 5 is a cross-sectional view of the protector disposed on an application axis.
La figura 6 es una perspectiva de la disposición de un protector sobre un eje. Figure 6 is a perspective of the arrangement of a protector on an axis.
La figura 7 es una perspectiva de la disposición de una sucesión de protectores consecutivos a lo largo de un eje. Figure 7 is a perspective of the arrangement of a succession of consecutive protectors along an axis.
La figura 8 es un ejemplo de disposición de una tira de elastómero fijada por encaje en el cuerpo de un semi-casquillo del protector de la invención. La figura 9 es otro ejemplo de disposición de una tira de elastómero fijada sobre una pieza accesoria encastrada en el cuerpo de un semi-casquillo del protector de la invención. Figure 8 is an example of an arrangement of an elastomer strip fixed by fit in the body of a semi-bushing of the protector of the invention. Figure 9 is another example of the arrangement of an elastomer strip fixed on an accessory piece embedded in the body of a semi-bushing of the protector of the invention.
Descripción detallada de la invención El objeto de la invención se refiera a un protector para ejes (1) de rodadura de vehículos ferroviarios, con el fin de evitar que los impactos de piedras u otros objetos durante la circulación del vehículo correspondiente puedan deteriorar el eje (1). DETAILED DESCRIPTION OF THE INVENTION The object of the invention relates to a protector for vehicle rolling shafts (1) railway, in order to avoid that the impacts of stones or other objects during the circulation of the corresponding vehicle can deteriorate the axle (1).
El protector comprende dos semi-casquillos (2) que se unen para formar una cubierta alrededor del eje (1) a proteger, como se observa en la figura 5, donde cada semi-casquillo (2) tiene un cuerpo semicilíndrico (3), sobre el cual van incorporadas en la parte interior unas tiras de elastómero (4) dispuestas en sentido longitudinal, es decir en la dirección (d) paralela al eje (1), como se observa en la figura 1. En cada semi-casquillo (2) el número de tiras de elastómero (4) puede ser variable, estando previsto que sean al menos tres tiras de elastómero (4) para garantizar un adecuado apoyo sobre el eje (1), y preferentemente cuatro, como se muestra en las figuras, pudiendo ser dichas tiras de elastómero (4) además de grosores variables, para adaptar la aplicación a ejes (1) de diferentes diámetros, con un mismo cuerpo semicilíndrico (3) de los semi- casquillos (2). The protector comprises two semi-bushes (2) that join together to form a cover around the shaft (1) to be protected, as shown in Figure 5, where each semi-bushing (2) has a semi-cylindrical body (3), on which are incorporated in the inner part strips of elastomer (4) arranged in a longitudinal direction, that is to say in the direction (d) parallel to the axis (1), as seen in figure 1. In each semi-bushing ( 2) the number of elastomer strips (4) can be variable, with at least three elastomer strips (4) being provided to ensure adequate support on the shaft (1), and preferably four, as shown in the figures , said elastomer strips (4) being in addition to variable thicknesses, to adapt the application to shafts (1) of different diameters, with the same semi-cylindrical body (3) of the half-sleeves (2).
Para ello las tiras de elastómero (4) pueden ir dispuestas directamente sobre la superficie interior de los semi-casquillos (2), fijadas con adhesivo o cualquier otro medio de pegado convencional; pero también pueden ir sujetas por encaje en alojamientos (5) definidos en la parte interior del cuerpo semicilíndrico (3) de los semi-casquillos (2), como muestra la figura 8; o pueden ir fijadas por pegado o cualquier medio convencional, sobre unas piezas postizas (6) incrustadas en colas de milano (7) o cualquier otro tipo de encaje definido en la parte interior del cuerpo semicilíndrico (3) de los semi-casquillos (2), como muestra la figura 9. For this, the elastomer strips (4) can be arranged directly on the inner surface of the semi-bushes (2), fixed with adhesive or any other conventional bonding means; but they can also be attached by fittings in housings (5) defined in the inner part of the semi-cylindrical body (3) of the semi-bushes (2), as shown in Figure 8; or they can be fixed by gluing or any conventional means, on false pieces (6) embedded in dovetails (7) or any other type of fit defined in the inner part of the semi-cylindrical body (3) of the semi-bushes (2 ), as shown in Figure 9.
Las tiras de elastómero (4) se disponen por el interior de los semi-casquillos (2) separadas y paralelas entre sí, y se extienden cubriendo parcialmente la longitud de los semi-casquillos (2) salvo en una zona (8) de cada extremo de los mismos, definiendo el cuerpo (3) de los semi-casquillos (2) en dichas zonas extremas (8) un ensanchamiento de su diámetro hacia el exterior, por donde se desaloja hacia el exterior la humedad que pueda producirse en el interior de los semi-casquillos (2). The elastomer strips (4) are arranged inside the semi-bushes (2) separated and parallel to each other, and extend partially covering the length of the semi-bushes (2) except in one area (8) of each end thereof, defining the body (3) of the semi-bushes (2) in said extreme areas (8) a widening of its diameter to the outside, where the moisture that can occur inside is removed to the outside of the semi-bushes (2).
Además, en los extremos y en los bordes longitudinales el cuerpo (3) de los semi-casquillos (2) posee unas pestañas (9, 10), de manera que en el acoplamiento de los dos semi- casquillos (2) componentes del protector de cubrimiento alrededor de un eje (1), las pestañas (9) de los bordes longitudinales hacen que entre los cuerpos (3) de los semi- casquillos (2) queden unos espacios abiertos, por los que también puede salir la humedad al exterior. In addition, at the ends and at the longitudinal edges the body (3) of the semi-bushes (2) has tabs (9, 10), so that in the coupling of the two semi-bushes (2) protector components covering around an axis (1), the tabs (9) of the longitudinal edges make open spaces between the bodies (3) of the semi-bushes (2), through which moisture can also escape outside.
Y por otro lado, en la disposición de una sucesión de protectores formados por conjuntos de dos semi-casquillos (2), para cubrir longitudinalmente un eje (1), como muestra la figura 7, las pestañas (10) de los extremos de los semi-casquillos (2) determinan que entre los protectores consecutivos queden a su vez unos espacios abiertos, por los que también puede salir la humedad al exterior sin que tenga que recorrer toda la longitud del eje (1). And on the other hand, in the arrangement of a succession of protectors formed by sets of two semi-bushes (2), to longitudinally cover an axis (1), as shown in Figure 7, the tabs (10) of the ends of the semi-bushes (2) determine that between the consecutive protectors there are also open spaces, through which moisture can also escape outside without having to travel the entire length of the shaft (1).

Claims

REIVINDICACIONES
1. - Protector de eje de rodadura de vehículos ferroviarios, que comprende dos semi- casquillos (2) de cuerpo (3) semicilíndrico que se unen entre sí rodeando el eje (1) de rodadura por su exterior, caracterizado por que cada semi-casquillo (2) tiene en su interior unas tiras de elastomero (4) postizas que se disponen en un sentido longitudinal paralelo al eje (1) de rodadura, cubriendo parcialmente el interior de los semi-casquillos (2). 1. - Protector of the rolling axis of railway vehicles, which comprises two semi-bushes (2) of semi-cylindrical body (3) that join together surrounding the rolling axis (1) on the outside, characterized in that each semi- Bushing (2) has inside elastomer strips (4) that are arranged in a longitudinal direction parallel to the rolling axis (1), partially covering the inside of the semi-bushes (2).
2. - Protector de eje de rodadura de vehículos ferroviarios, según la primera reivindicación, caracterizado por que las tiras de elastomero (4) se disponen separadas y paralelas entre sí, extendiéndose longitudinalmente a lo largo de los semi-casquillos (2) salvo en unas zonas (8) en los extremos de los mismos, en donde el cuerpo (3) de los semi-casquillos (2) define unos ensanchamientos de su diámetro hacia el exterior. 2. - Protector of the rolling axis of railway vehicles, according to the first claim, characterized in that the elastomer strips (4) are arranged separated and parallel to each other, extending longitudinally along the semi-bushes (2) except in zones (8) at the ends thereof, where the body (3) of the semi-bushes (2) defines widening of its diameter towards the outside.
3.- Protector de eje de rodadura de vehículos ferroviarios, según una cualquiera de las reivindicaciones anteriores, caracterizado por que cada semi-casquillo (2) incorpora, al menos, tres tiras de elastomero (4). 3. Protector of the rolling axis of railway vehicles, according to any one of the preceding claims, characterized in that each semi-bushing (2) incorporates at least three elastomer strips (4).
4. - Protector de eje de rodadura de vehículos ferroviarios, según una cualquiera de las reivindicaciones anteriores, caracterizado por que las tiras de elastomero (4) van fijadas por pegado sobre la superficie interior del cuerpo (3) de los semi-casquillos (2). 4. - Protector of the rolling axis of railway vehicles, according to any one of the preceding claims, characterized in that the elastomer strips (4) are fixed by gluing on the inner surface of the body (3) of the semi-bushes (2 ).
5. - Protector de eje de rodadura de vehículos ferroviarios, según una cualquiera de las reivindicaciones 1 a 4, caracterizado por que las tiras de elastomero (4) se sujetan por encaje en alojamientos (5) definidos en la parte interior del cuerpo (3) de los semi-casquillos (2). 5. - Treadmill protector of railway vehicles, according to any one of claims 1 to 4, characterized in that the elastomer strips (4) are held by fit in housings (5) defined in the inner part of the body (3 ) of the semi-bushes (2).
6. - Protector de eje de rodadura de vehículos ferroviarios, según una cualquiera de las reivindicaciones 1 a 4, caracterizado por que las tiras de elastomero (4) se fijan sobre unas piezas postizas (6) que van incrustadas en la parte interior del cuerpo (3) de los semi- casquillos (2). 6. - Protector of the rolling axis of railway vehicles, according to any one of claims 1 to 4, characterized in that the elastomer strips (4) are fixed on false pieces (6) that are embedded in the inner part of the body (3) of the semi-bushes (2).
PCT/ES2017/070338 2016-05-24 2017-05-22 Protector for rotary shaft of railway vehicles WO2017203080A1 (en)

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ES201630671A ES2647961B1 (en) 2016-05-24 2016-05-24 RAILING VEHICLE BEARING SHAFT PROTECTOR
ESP201630671 2016-05-24

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WO2023244188A1 (en) * 2022-06-17 2023-12-21 Atik Goekhan Wood conveyor line shaft protection element

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WO2023244188A1 (en) * 2022-06-17 2023-12-21 Atik Goekhan Wood conveyor line shaft protection element

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