EP3121089A1 - Pneumatic spring assembly for railway vehicle and railway vehicle with pneumatic spring assembly - Google Patents

Abstract

An air spring arrangement (100) is provided for secondary air suspension between the vehicle body and the bogie of a rail vehicle. The air spring arrangement (100) has a first connecting line (121) for supplying compressed air to a first air spring (131) and a second connecting line (122) for supplying compressed air to a second air spring (132). The air spring arrangement (100) also has a compressed air tank (110) which provides a first additional air volume (111) and a second additional air volume (112) separated from the first one. The first connecting line (121) can be connected to the first additional air volume (111) and the second connecting line (122) can be connected to the second additional air volume (112). The air spring assembly has a first port (141) for connecting the first connection line (121) to the first supplemental air volume (111) and a second port (142) for connecting the second connection line (122) to the second additional air volume (112), both Connections (141, 142) are arranged on the same side of the compressed air tank (110). Typically, the compressed air tank (110) is attachable to the body or bogie of a rail vehicle.

Description

Technical area

The invention relates to an air spring arrangement for the suspension of a rail vehicle, in particular the invention relates to an air spring arrangement for a secondary suspension between the vehicle body and bogie of a rail vehicle.

Prior art

A rail vehicle is usually sprung in various ways to increase safety and comfort. For a high level of comfort and a high level of acceptance of rail transport among passengers and train drivers, primary suspension and secondary suspension are usually provided. The suspension between the wheelsets and the bogie is taken over by the primary suspension. The primary suspension is usually realized by leaf springs, but also by coil springs or rubber springs.

The secondary suspension is used for the suspension between bogie and car body. This also coil springs, but increasingly air springs are used. A secondary suspension for a bogie may include, for example, two air springs. In the case of a Jacob bogie, the secondary suspension of the Jacob bogie may also include four air springs.

The secondary suspension usually has so-called additional volumes, which are connected via connecting lines with the actual air spring volume. When connecting one additional air volume to one air spring, two additional air tanks and corresponding supply lines are used. These additional air volumes serve to increase the compressible air volume of the air springs and thus the increase in the compliance of the air spring.

In the EP 0 568 043 B1 For example, a bogie for rail vehicles with primary and secondary suspension is described. The secondary suspension is designed as an air suspension, wherein the air springs are designed as Torusbälge, which are connected via lines with two separate additional volumes. Between the Torusbälgen and the additional volumes three-way valves are arranged.

The EP 1 610 995 B1 describes a chassis for a rail vehicle with a wheelset. The rail vehicle has a chassis frame supported by a primary suspension on the wheel set and a secondary suspension for supporting a car body on the chassis frame. In addition, the rail vehicle is equipped with a transverse suspension, wherein the transverse suspension is arranged above the secondary suspension and below the floor of the car body.

Disadvantages of the prior art

The above solutions require a double design of the air spring arrangement in terms of additional air volumes. However, this causes an increased mass and an increased space requirement. The increased mass has a negative effect on the energy required to operate the rail vehicle, while the increased space requirement can mean difficulties in accommodating the air spring arrangement or other components of the rail vehicle.

problem

It is therefore an object of the present invention to provide an air spring arrangement for a secondary suspension of a rail vehicle, which reduces the system mass and the space requirement.

Inventive solution

This object is achieved by an air spring arrangement according to claim 1, a rail vehicle according to claim 12 and a method for connecting Zustazluftvolumina to air springs according to claim 14. Further embodiments, modifications and improvements will become apparent from the following description and the appended claims.

According to one embodiment, an air suspension arrangement for secondary air suspension is provided between the vehicle body and the bogie of a rail vehicle. The air spring assembly comprises a first connection line to Connecting a first additional air volume with a first air spring and a second connecting line for connecting a second additional air volume with a second air spring. The air spring arrangement also has a compressed air tank, which provides a first additional air volume and a second additional air volume separated from the first additional air volume. The first connecting line is connectable to the first additional air volume and the second connecting line to the second additional air volume. The air spring arrangement also has a first connection for connecting the first connection line to the first additional air volume and a second connection for connecting the second connection line to the second additional air volume. Both connections are arranged on the same side of the compressed air tank. Typically, the compressed air tank on the car body or on the bogie of a rail vehicle can be fastened, in particular, the compressed air tank on the car body or bogie is replaceable fastened. In one embodiment, the first additional volume and the second additional volume are separated by a separating device, in particular a partition, in the compressed air tank, wherein both ports are arranged on the same side of the separating device. According to some embodiments, "on the same side of the separation device" may mean that the connections are connected to the two connection lines on the side of the first additional air volume or on the side of the second additional air volume. The connections can be arranged in the region of one of the two end faces of the compressed air tank and / or in the region of the jacket of the compressed air tank, for example in the longitudinal direction relative to the center of the compressed air tank in the direction of one of the two end faces.

The air spring assembly according to embodiments of the invention allows by combining both air springs with two separate compressed air volumes of a single compressed air tank, a reduction in the mass of the air spring assembly. Instead of providing two separate compressed air tanks, a compressed air tank is now provided. In particular, in the case of a substantially cylindrical configuration of the compressed air tank, the ratio of volume to surface is advantageous here, in particular in the case of a larger embodiment of the compressed air tank in comparison to previous compressed air tanks. A reduced mass saves not only material costs, but also energy costs during operation of the rail vehicle.

Another advantage of the air spring assembly described herein is the reduced and more flexibly configurable space requirement. The one compressed air tank, which is connected to both springs, takes up less space than two separate containers. A reduced space requirement allows a more favorable positioning of the container in the rail vehicle, in particular with respect to the position of the air springs. This is also favored by the connections of the connecting lines on the same side. With the solution according to the invention, it is no longer necessary to access the compressed air tank from two sides. For example, in prior art compressed air tanks, installation space had to be provided at two positions of the rail vehicle for routing the connection lines. With the air spring arrangement according to embodiments described herein, it is sufficient if space is available at a position of the rail vehicle. The thus enabled, more favorable positioning can in turn allow a shortening of the connecting lines to the springs. Shorter connecting lines additionally contribute to reducing the mass of the air spring arrangement and have a positive effect on the spring properties of the secondary suspension, by increasing the compliance at higher frequencies. The design of the connecting lines between the compressed air tank and air springs can in some embodiments allow a symmetrical structure, which in turn positively affects the manufacturing cost. The (especially replaceable) attachment of the compressed air tank on the car body or on the bogie allows easy replacement of the compressed air tank, for example with a new compressed air tank during maintenance or with a compressed air tank, which has only an additional air volume, if only a common additional air volume for both air springs is desired. The use of the compressed air tank with two separate volumes also preserves the possibility to realize by the use of orifices in the necessary for a two-point control of the air suspension connecting lines of the air springs, an attenuation that dampens the roll of the car body. This is done without affecting the vertical suspension characteristics (damping and stiffness).

According to one embodiment, the first connection line and the second connection line are in fluid communication with each other. As a result, further control parameters for the compressed air flow to the air springs can be influenced, such as Example a compensation or exchange between the first and the second connection line.

The above-described "fluidic connection" can be realized for example by a compensation line. In one embodiment, the compensation line may have a reduced diameter and thus at the same time act as a throttle between the first and the second air spring. Alternatively or additionally, a diaphragm or a control valve can be provided.

In one embodiment, the first connection line and the second connection line are in fluid communication via an orifice or control valve for limiting a fluidic flow between the first and second supplemental air volumes. The orifice or control valve allows quick and reliable control of the flow between the two connection lines. In addition, in this embodiment, a damping function for damping the roll of the car body by means of the air springs can be realized. The damping of the rolling through the connection between the first and the second connecting line can be integrated inexpensively and easily into the air spring arrangement.

In one embodiment, at least one of the two connecting lines may have a container section extending inside the compressed air tank. This simplifies the arrangement of both connecting lines on one side of the container, or on one side of the separating device, which leads to a simpler positioning and mounting of the compressed air tank and the two connecting lines. Such a container is much easier and better position than two separate containers or a container whose connections are arranged on two different sides. The manner of connecting two additional air volumes on the same side of the compressed air tank or separator, such as via a dished bottom, is also transferable to the connection of more than two volumes (e.g., using Jacobs bogies with four air springs).

According to one embodiment of the air spring arrangement described herein, the compressed air tank on two dished ends, wherein the first connection for the first connection line and the second connection for the second supply arrangement are connected to the same dished bottom with the compressed air tank. Next to the top mentioned advantages of the arrangement of the two ports on the same side of the compressed air tank, or the separator, the design can save manufacturing costs by means of dished bottom, since one of the dished ends can be easily adjusted before assembling the compressed air tank.

In one example, the first additional air volume and the second additional air volume of the compressed air tank may be separated by a partition wall. This represents a simple and cost-effective realization of the two volumes in a compressed air tank. In one embodiment of the air spring arrangement according to the invention, the position of the partition within the compressed air tank can be adjustable, for example displaceable. The sizes of the first and the second additional volume can be varied by a displacement of the intermediate wall, for example, to compensate for the volume reduced by the tubes used. According to one embodiment, the air volumes provided for the first and the second air springs (composed of the volume in the compressed-air reservoir and the volume in the connecting lines) can be identical across the position of the partition wall inside the container. This can also be done, for example, to compensate for the (possibly) different volume of the two container sections of the supply lines in the compressed air tank. In one example, therefore, the partition is not centered within the compressed air tank, but shifted in the direction of one of the two additional air volume.

In one embodiment, the compressed air tank has a longitudinal direction and a transverse direction, wherein the partition wall extends substantially in the transverse direction in the compressed air tank. For example, a substantially cylindrical compressed air tank may be provided having a longitudinal direction and a transverse direction, the transverse direction extending in the radial direction of the substantially cylindrical compressed air tank. The shape of the partition can therefore correspond in one embodiment substantially to the cross section of the compressed air tank. The arrangement of the partition in the transverse direction of the compressed air tank can ensure a high stability of the two volumes and good flow conditions.

According to one embodiment, a container portion of the first connection line and a container portion of the second connection line each extend within the compressed air tank. The running inside the compressed air tank Container portion of the first connection line and extending within the compressed air tank container portion of the second connection line may have approximately the same length. In particular, the two container sections of the first connecting line and the second connecting line may have a difference in length of not more than 15% to 20% relative to the longer of the two container sections extending within the compressed air tank. In this case, the container sections can be formed, for example, by tubes (straight or curved). The comparable length of the two connecting lines ensures a symmetrical air pressure properties in the springs. Due to the very similar or the same fluid mechanical conditions, the two springs can be targeted and operated. According to one embodiment, the length difference for straight and substantially parallel tubes may be approximately 1.5 * diameter of the tube. In one example, the length difference of the container portions of the first connection line and the second connection line may be approximately between about 45 cm and about 65 cm. In one embodiment, by a corresponding shaping (bending / bending of the tube end) of the shorter tube, the length can be made identical and at the same time the flow behavior can be improved.

The advantage of a straight design of the container sections, or of the container section of the first connecting line, is the simple construction. However, disadvantages can result from the (even if only small) length difference of the different tube lengths and the resulting different air column lengths. Different air column lengths entail a different damping behavior of the two control circuits of the two air springs. Therefore, a straight piping calculation should give an idea of the exact differences. In a curved casing of one of the two container portions of the connecting lines, the length of the curved tube corresponds to the length of the straight tube. The advantage of the curved design is the same tube length of the container sections, the resulting same air column lengths and thus a nearly equal damping behavior of both air springs.

In one example, the container portion of the first connection line and the container portion of the second connection line are secured together within the compressed air tank. The connection of the container sections together increases the stability of the air spring assembly and avoids independent vibrations of the individual Container sections. The connection of the container sections can be provided in the container, eg via a welded clamp on the other tube.

According to one embodiment, the compressed air tank has a circular cylindrical shape with an outer diameter D, wherein at least one of the two front ends, but in particular both front ends of the compressed air tank is formed by a dished bottom. A first connection for connecting the first connecting line to the additional air volume and a second connection for connecting the second connecting line to the additional air volume are arranged on the dished bottom in a region with a radius of 0.4 × D about a longitudinal axis of the compressed air tank. The outer diameter D may in one example assume values between about 20 cm to about 50 cm. In this case, the first and second ports may have the same or a different distance to the longitudinal axis of the compressed air tank. The position of the connections on the dished bottom can be freely selected in the range with a radius of at least 0.4 * D. As a result, a placement of the container is even more variable.

The compressed air tank may have more than two additional air volumes in another example. In this case, in each case connect a connecting line each additional air volume of the compressed air tank, each with an air spring of a secondary suspension between the car body and turn position of a rail vehicle. Thus, for example, three or four air springs (for example, four air springs for a Jakobsdrehgestell) can be connected to the one compressed air tank with the several additional air volumes. This simplifies the design of more complex secondary springs and reduces both the overall mass of the secondary suspension system and the required installation space.

In one embodiment, the compressed air tank of an air spring arrangement has a fastening element in order to be able to attach the compressed air tank to a rail vehicle, in particular to a car body or a bogie of a rail vehicle. In an example, the fastener may be a strap, a loop, a notch, a strap, or the like.

According to one embodiment, a rail vehicle with a secondary suspension between the bogie and the car body of Rail vehicle provided, the secondary suspension per bogie having a first air spring and a second air spring. The rail vehicle also has a receptacle for an air spring arrangement according to embodiments described herein. In particular, the rail vehicle may have a receptacle for the compressed air tank of the air spring arrangement. In one example, the receptacle may allow attachment of the compressed air reservoir of the air spring assembly to the car body or to the bogie of the rail vehicle. For example, the rail vehicle may take up the accommodation in the form of a formation (eg a corresponding installation space or a trained gap), a fastening device (eg in the form of fastening or tightening straps, fastening or clamping clips, screw connections and the like), and / or a complementary structure provide. In one embodiment, a rail vehicle is provided with an air spring assembly.

According to one embodiment, there is provided a method of providing air springs for secondary suspension between the vehicle body and the bogie of a rail vehicle. The method comprises providing a first compressed air connection between a first additional air volume of a compressed air tank and a first air spring of a secondary suspension and providing a second compressed air connection between a second additional air volume of the same compressed air tank separated from the first additional air volume and a second air spring of the secondary suspension. The method further comprises connecting the first compressed air connection to the first additional air volume on one side of the compressed air tank, or the separation device separating the first and second additional volumes, and connecting the second compressed air connection to the second additional air volume on the same side of the compressed air tank separator. According to one embodiment, the method further comprises providing a fluidic connection between the first compressed air connection and the second compressed air connection regulated by means of a diaphragm or an adjustable valve for regulating the compressed air flow between the first and the second compressed air connection.

The described air spring arrangement according to embodiments of the invention can be used in all rail vehicles with a secondary suspension, but also in other vehicles.

characters

• Figur 1a zeigt eine Luftfederanordnung nach einer Ausführungsform der Erfindung.
• Figur 1b zeigt die Luftfederanordnung aus Figur 1a und eine Innenansicht des Druckluftbehälters.
• Figur 2 zeigt eine Luftfederanordnung nach einer weiteren Ausführungsform der Erfindung.
• Figur 3a zeigt eine Seitenansicht eines Druckluftbehälters für eine Luftfederanordnung nach einer Ausführungsform.
• Figur 3b zeigt eine Schnittansicht des Druckluftbehälters aus Figur 3a.
• Figur3c zeigt eine weitere Schnittansicht des Druckluftbehälters aus Figur 3a.
• Figur 3d zeigt eine Draufsicht eines Klöpperbodens eines Druckluftbehälters nach Ausführungsformen der Erfindung.
• Figur 3e zeigt eine Seitenansicht des in Figur 3d gezeigten Klöpperbodens eines Druckluftbehälters nach Ausführungsformen der Erfindung.
• Figur 3f zeigt eine Detailansicht des Druckluftbehälters aus Figur 3a.
• Figur 3g zeigt eine weitere Detailansicht des Druckluftbehälters aus Figur 3a.
• Figur 4a zeigt einen Druckluftbehälter für eine Luftfederanordnung nach einer Ausführungsform.
• Figur 4b zeigt einen Druckluftbehälter für eine Luftfederanordnung nach einer weiteren Ausführungsform.
• Figur 5a zeigt eine Seitenansicht einer Luftfederanordnung nach Ausführungsformen der Erfindung.
• Figur 5b zeigt eine Sicht von oben und von der Seite auf die Luftfederanordnung aus Figur 5a.

The accompanying drawings illustrate embodiments and, together with the description, serve to explain the principles of the invention. The elements of the drawings are relative to one another and not necessarily to scale. Like reference numerals designate corresponding parts accordingly.

• FIG. 1a shows an air spring assembly according to an embodiment of the invention.
• FIG. 1b shows the air spring assembly FIG. 1a and an inside view of the compressed air tank.
• FIG. 2 shows an air spring assembly according to another embodiment of the invention.
• FIG. 3a shows a side view of a compressed air tank for an air spring assembly according to an embodiment.
• FIG. 3b shows a sectional view of the compressed air tank FIG. 3a ,
• Figur3c shows a further sectional view of the compressed air tank FIG. 3a ,
• 3d figure shows a plan view of a dished bottom of a compressed air tank according to embodiments of the invention.
• FIG. 3e shows a side view of the in 3d figure shown dished bottom of a compressed air tank according to embodiments of the invention.
• FIG. 3f shows a detailed view of the compressed air tank FIG. 3a ,
• FIG. 3g shows a more detailed view of the compressed air tank FIG. 3a ,
• FIG. 4a shows a compressed air tank for an air spring assembly according to an embodiment.
• FIG. 4b shows a compressed air tank for an air spring assembly according to another embodiment.
• FIG. 5a shows a side view of an air spring assembly according to embodiments of the invention.
• FIG. 5b shows a view from above and from the side of the air spring assembly FIG. 5a ,

embodiments

FIG. 1a shows a schematic drawing of an arrangement for supplying two air springs 131, 132 of a secondary suspension of a rail vehicle. Typically, the secondary suspension is arranged between the car body and the bogie of a rail vehicle. The air volume of the air springs 131, 132 is increased by a compressed air tank 110 with two compressed air volumes 111 and 112. For this purpose, the first air spring 131 is connected by a first connecting line 121 to the compressed air tank 110 and the second air spring 132 by a second connecting line 122 to the same compressed air tank 110. The compressed air tank 110 typically has two compressed air volumes 111, 112, which are each connected to one of the two air springs 131, 132. According to embodiments of the invention, the compressed air tank meets the safety requirements for pressures of 0 bar to about 10 bar and a test pressure of 15 bar. The compressed air tank can be equipped accordingly, for example by a suitable wall thickness, the choice of a suitable material, a suitable attachment of the individual parts of the container and the like.

FIG. 1b shows in dashed lines the interior view of the compressed air tank 110. The compressed air tank 110 is divided transversely into two compressed air volumes 111 and 112, which are both about the same size. In particular, the two compressed air volumes 111 and 112 are separated by a separating device or partition 170. Typically, both compressed air volumes are subjected to the same pressure. The first connection line 121, which is connected to the first air spring 131, is connected to the first additional air volume 111 of the compressed air tank 110, while the second connection line 122, which is connected to the second air spring 132, is connected to the second additional air volume 112 of the compressed air tank 110 ,

The air spring assembly 100 has a port 141 to the compressed air tank 110 to establish the connection between the compressed air tank 110 and the connecting line 121. The second connection line 122 is by means of Port 142 connected to the compressed air tank (110). The FIGS. 1a and 1b show that both connecting lines to one side of the compressed air tank 110, or on one side of the partition wall 170, are connected. This is particularly favorable with regard to the installation space, since the connection lines can be made relatively short.

The connecting lines 121 and 122 are also in fluid communication with each other, ie in a connection that allows the Austasuch of fluids between the two connecting lines. In the in the FIGS. 1a and 1b As shown, the connecting lines 121, 122 are connected to each other and to the compressed air tank by a kind of double tee. As will be described later, the connection between the connection lines may be a shutter (as in FIG FIG. 1b shown) or contain a control valve.

FIG. 2 shows a further embodiment of an air spring assembly 100. The air spring assembly 100 has a compressed air tank 110, and two connecting lines 121 and 122 on. The pressure vessel 110 has a partition wall 170 which separates two additional air volumes 111, 112. In the in FIG. 2 In the embodiment shown, the connections 141 and 142 of the connecting lines 121 and 122 are arranged on a side wall of the compressed air tank 110. In comparison, the terminals are in other embodiments described herein (for example, those described later FIG. 3b ) on a dished bottom of the compressed air tank 110. In the FIG. 2 can be seen that the connections of the connecting lines are still provided on one side of the partition. In particular, as well as in the FIG. 1b 1, a container portion 161 of the first connection line 121 through the second additional volume 112 of the compressed air tank through to the first additional volume 111.

In FIG. 2 In addition, the longitudinal members 190 of the rail vehicle are shown, between which the compressed air tank 110 may be arranged. In the example shown, the connecting lines 121, 122 have bends or curves. As a result, the cables can be laid in the jacket region of the rail vehicle. The design with the lateral supply of the connecting lines to the compressed air tank, the bending of the connecting lines and the associated arrangement of the lines in the jacket area creates a space 196 in front of the compressed air tank 110 for other trades, such as electrical equipment and junction boxes. For this purpose, the connecting lines 121, 122 through the Side members 190 out and provided arcs in the lines. Calculations, however, did not give any detrimental effect of this evolution of the lines on the damping behavior of the system.

An advantage of the air spring arrangement according to the invention thus results from the improved possibilities for space design around the compressed air tank. In general, different, not shown here variants of the connection line feed can be used without departing from the scope.

FIG. 3a shows a side view of a compressed air tank 110 for an air spring assembly 100, as shown for example in the FIGS. 1a and 1b was shown. The compressed air tank 110 is formed as a substantially cylindrical body. The compressed air tank is composed of a first dished bottom 113, a middle part 116 and a second dished bottom 114. The dished bottoms 113 and 114 close the cylindrical body and may, for example, be welded to the central part 116. In another example, the dished bottoms 113, 114 may be secured to the center portion by rivets or similar attachment means.

The central part 116 of the compressed air tank 110 may be configured as a cylinder. The dished bottoms 113 and 114 may have a first portion continuing the cylindrical shape of the center portion 116 and an outwardly bowed or arched second portion. The resulting by the composition of the central portion 116 and the dished ends 113 and 114 compressed air tank having a substantially cylindrical shape has a longitudinal axis 115 which extends in the longitudinal direction of the compressed air tank on. In particular, the longitudinal axis 115 may be an axis of symmetry. In addition, the compressed air tank may have a transverse direction 117 which extends in the radial direction of the substantially cylindrical compressed air tank.

The compressed air tank 110 may also have connections for filling the compressed air tank with compressed air, or connections for connection to the air supply or level control. In addition, the compressed air tank may have openings for draining water.

FIG. 3b shows a sectional view of the compressed air tank 110 from FIG. 3a along the line EE. It can be seen that the partition wall 170 is a first Additional air volume 111 and a second additional air volume 112 in the compressed air tank 110 separates. The partition extends substantially in the transverse direction 117 of the compressed air tank. In one embodiment, the shape of the partition substantially corresponds to the shape of the cross section of the compressed air tank 110 in the transverse direction. On the dished bottom 114, a first terminal 141 for the first connecting line 121 and a second terminal 142 for the second connecting line 122 are attached. Thus, both connecting lines can be connected to the same side of the compressed air tank, or on the same side of the partition. FIG. 3b also shows a container portion 161 of the first connection line 121. The container portion 161 extends within the compressed air tank 110 and passes through the second, front volume 112 therethrough. With the container portion 161 of the first connecting line 121, it is possible to connect both connecting lines separately with different volumes within the one compressed air tank with compressed air. In the in the FIG. 3b As shown, the second connecting line 122 has no container portion, but is simply connected through the port 141 to the second (front) additional air volume 112 of the compressed air tank.

Figure 3c showed a sectional view of the compressed air tank FIG. 3a along the line DD, ie that Figure 3c a view from the second additional air volume 112 in the direction of the dished bottom 114 shows. In the sectional view, one can see the container portion 161 of the first connection line 121, which leads from the first additional air volume 111 to the connection 141 on the dished bottom 114. The sectional view further shows the connection 142 of the second volume 112 of the compressed air tank 110, to which the second connection line 122 can be connected. Additionally shows Figure 3c the substantially circular contour of the pressure vessel 110. The pressure vessel 110 has a diameter D. In one example, the diameter D of the compressed air tank may be up to about 50 cm. For example, according to embodiments described herein, the total compressed air reservoir may have a volume of about 80 liters to 100 liters, but also a volume of up to about 200 and more liters.

Like from the FIGS. 3b and 3c The two connections 141, 142 are arranged in the vicinity of the longitudinal axis 115 of the compressed air tank 110. In particular, the connections 141 and 142 may be arranged on the dished bottom in a region with a radius of 0.4 × D about the longitudinal axis 115 of the compressed air tank 110. In terms of The size of the area can be a balance between sufficient stability of the compressed air tank and low installation space for the connections, or the connecting lines, carried out to determine the optimum range.

The Figures 3d and 3e show the region 104 in which the two ports 141,142 can be arranged and which has a radius of about 0.4 * the diameter 103 of the compressed air tank. For a compressed air tank with eg D = 400mm a circle with the dimensions 0.4xD describes a surface perpendicular to the longitudinal axis of the tank (dashed in 3d figure ) on the dished bottom - within which the connecting pieces of the supply lines can be placed arbitrarily. According to one embodiment, the circumscribing circle is the tangential limit measure (see DIN EN 286-2 / 3). FIG. 3e shows a side view of the dished bottom 114 with the two connection nozzles 141, 142 in a region 104. In addition, the axes of the connection piece can be made at 45 ° to the normal with respect to the dished bottom so as to be able to provide an obliquely set connection.

As the specialist the FIGS. 3b to 3e can be removed, the terminals are spaced from each other. The distance between the ports 141 and 142 to the longitudinal axis 115 of the compressed air tank may be the same or different.

FIG. 3f shows a detailed view F of the dished bottom 114 and the terminal 141 of the compressed air tank 110 from FIG. 3b , In the in the FIG. 3f As shown, the terminal 141 is formed as a part of the dished bottom 114. In other embodiments, the port 141 may also be formed as part of the first connection line, or may be a separate component that is mounted to the compressed air tank. For example, the port 141 may be inserted into a designated bore in the dished bottom 114 and / or welded thereto.

FIG. 3f also shows the tank portion 161 of the first connection pipe 121. The tank portion 161 is welded to the inside of the dished bottom 114 and the terminal 141. To stabilize a weld on the outside of the compressed air tank between the dished bottom 114 and the terminal 141 is attached.

FIG. 3g shows a detail view G of the partition wall 170 and the container portion 161 of the first connection line 121 from FIG. 3b , The partition 170 separates the first volume 111 and the second volume 112, through which the container portion 161 is guided, to provide a connection from the first connection line 121 to the first additional air volume 111 of the compressed air tank 110. FIG. 3g shows that the container portion 161 of the first connection pipe 121 is welded to the partition wall from two sides. Reliable and sufficient structural strength is helpful, for example, to substantially avoid vibrations in the container section.

FIG. 4a shows a sectional view of another embodiment of a compressed air tank 110 for an air spring assembly 100. The compressed air tank 110 has a central portion 116 and two dished ends 113 and 114 on. A partition wall 170 separates the first supplemental air volume 111 from the second supplemental air volume 112 within the compressed air tank 110. Details F and G may be as described with reference to FIGS Figures 3f and 3g be designed described. In order to ensure approximately equal lengths of conduit within the vessel for the first, rear and second forward volumes, the forward, second volume 112 may be connected via an additional connection (such as a vessel portion 162) which may be adapted in length to the requirements (eg, substantially the same length as the connection or container portion 161 to the first, rear volume). Compared to the embodiment of a compressed air tank as in FIG. 3b is shown, the compressed air tank 110 of the FIG. 4a therefore, a first tank portion 161 of the first connection pipe 121 and a second tank portion 162 of the second connection pipe 122. Both container sections 161 and 162 extend within the compressed air tank 110. In order to connect the first air spring to the first volume 111, the first tank section 161 of the first connection line 121 extends through the partition wall 170 (as exemplified in FIG FIG. 3g shown) and thus supplies the first connecting line 121 (and thus also the first air spring 131) with compressed air. The second container portion 162 ends (short) in front of the partition wall 170 and thus establishes a connection between the second air spring 132 and the second additional air volume 112. In one embodiment, the container portion 162 of the second connection line 122 may be up to about 400 mm in length, and the container portion 161 of the first connection line 121 may be up to about 340 mm in length. Generally, in the straight configuration of the two container sections, a length difference of about 50 mm to 60 mm may occur.

The volume difference between the two (in the case of straight lines of different lengths) container sections between the first additional volume 111 and the second additional volume 112 can be adjusted by the position of the partition (even the same size). In addition, the exact position of the partition wall for dividing the two volumes due to the reduction in volume of the second additional air volume 112 penetrating tubes (or container portions of the connecting lines) can be adjusted so that the first volume 111 is equal to the second volume 112. The position of the dividing wall 112 in the direction of the longitudinal axis may preferably be selected such that the volume reduced by the container sections 161, 162 of the supply lines used becomes equal. The required volumes of the first compressed air volume 111 and of the second compressed air volume 112 and of the additional volume integrated into the second compressed air volume 112 for compensating the used container portions 161, 162 of the supply lines 121, 122 serve to determine the exact position of the dividing wall, so that the compressed air volume 111 is preferred is equal to the volume 112. The compressed air tank 110 may comprise two part bodies, each adjacent to the partition wall 170 and welded together with this. Both partial volumes and the dividing wall are welded together with one or more welding processes (x root pass and y cover layers) and from the outside FIG. 4a shows, the container portions 161, 162 are provided with substantially equal lengths. In this case, a variance of about 15% to 20% of the length of the first container portion 161 may occur in order to ensure stable provision of the two container portions 161, 162 on both sides of and beyond the partition wall 170. The two container sections 161, 162 can be fastened within the compressed air tank 110, eg via a welded clamp, on the respective other container section. In the FIG. 4a an attachment of the container portions 161, 162 is shown by a fastener 165. As a result, disturbances of the lines, such as vibrations, can be minimized and thus stable cable routing and stable flow conditions can be achieved.

FIG. 4b shows an embodiment similar to that in FIG FIG. 4a shown variant. In the FIG. 4b However, the second container portion 162, that is, the container portion of the second connecting line within the volume 112, designed curved. Due to the curvature of the container portion 162 exactly equal lengths of the first and the second container portion can be realized, which has a favorable effect on the symmetry of the behavior of the air spring assembly. How to get in FIG. 4b can see, the Air in the curved container portion 162 is not on the partition wall 170. The curvature of the container portion can be optimized fluid mechanics, the flow behavior is not influenced by the curvature itself to a significant extent. For example, the curvature can be steady. In one embodiment, each of the connecting lines outside the compressed air tank can have different lengths, eg when the compressed air tank is installed asymmetrically with respect to the compressed air springs. Since using the herin described double chamber container in particular the space between the side rails in question (for example, with symmetrical wiring), this space but also for electricity and the antenna system must be used, a timely vote on a common use of space is recommended.

FIG. 5a shows a side view of an air spring assembly 100 according to embodiments of the invention. FIG. 5b shows a view from the top and from the side of the in the FIG. 5a shown air spring assembly 100. The air spring assembly 100 has a compressed air tank 110, which may be, for example, a compressed air tank, as in the FIGS. 3a to 3g or 3 shown and described. A first connection line 121 is connected to the dished bottom 114 of the compressed air tank 110 via a first connection 141. The second connection line 122 is connected to the same dished bottom 114 of the compressed air tank 110 via a second connection 142, which is separate from the first connection 141. The dished bottom 113 closes the compressed air tank 110 at the opposite side of the connections 141, 142 for the connecting lines.

As described above, the two connection lines are fed by two separate volumes in the compressed air tank 110. The connecting lines 121 and 122 are fluidly connected to one another via a connection 150. The connection 150 may include, for example, shutters or a control valve that regulates the flow of air in the connection 150. The use of the described two-volume container and a control valve or diaphragms between the connecting lines offers the possibility to realize an attenuation by the air springs, which dampens the roll of the car body, without affecting the vertical suspension properties.

The control valve can be controlled from the outside and to a control mechanism for the air springs (in the FIGS. 5a and 5b Not shown) be connected. The connection 150 between the connecting lines, as can be seen in the FIGS. 5a and 5b can recognize, connecting pieces for the connecting lines 121, 122 have. While the connection lines 121, 122 are merely formed by tubes in the example shown, the connection 150 provides connection pieces into which the tubes can be inserted and fastened. In this case, the connection 150 between the connecting lines 121, 122 also contribute to the stabilization of the air spring arrangement 100.

On the outside of the compressed air tank 110, in particular on the outside of the central portion 116 of the compressed air tank, a fastening element 180 is mounted in the form of a bracket. The bracket 180 may be used to secure the air tank 110 to the car body or bogie of the rail vehicle. For example, the rail vehicle may have a receptacle in the form of an extension or a spike that can engage the bracket 180 to hold the air tank. An additional fixation can be done for example by means of fixing straps and / or screws.

The fastener 180 allows the compressed air tank or the entire air spring assembly easily replaced, for example, for maintenance purposes. But even a replacement of the compressed air tank with another model of the compressed air tank is so uncomplicated possible. For example, the air tank with an air volume according to embodiments described herein can be replaced by a compressed air tank with only one additional air volume for the two air springs. In another example, the compressed air tank can be easily disassembled to modify it to another model, and after modification, re-mounted to the car body or bogie. Modification can be made, for example, by removing the bulkhead to make a single additional volume of air from the two separate volumes of compressed air.

According to one embodiment, the compressed air tank may also have more than two compressed air volumes. For this purpose, further partitions may be provided within the compressed air tank, which may extend in the transverse direction or in the longitudinal direction of the compressed air tank.

By the air spring assembly according to embodiments described herein, several effects can be achieved. For example, by using the air spring arrangement according to the invention, a reduced space requirement, improved possibilities of integration, eg with electrical components, and a simplified configuration of the connections at the front end of the container can be realized. In addition, the air spring assembly according to the invention is very flexible in design and can be adapted to the needs and wishes of a customer. For example, a connection between the two separate volumes may be configured as described above by a connection between the tube ends at the container exit. In another example, the front volume connection tube may be lengthened to balance the mass of air moving in the tube for both ports. A clamp inserted into the container can support the connecting pipe and prevent the connecting pipe from vibrating.

LIST OF REFERENCE NUMBERS

100

Air spring arrangement

103

diameter

104

Area

110

Air receiver

111

first additional air volume

112

second additional air volume

113, 114

dished ends

115

Longitudinal axis of the compressed air tank

116

Middle part of the compressed air tank

117

Transverse direction of the compressed air tank

121, 122

interconnectors

131, 132

air springs

141, 142

Connection to compressed air tank

150

Connection of the connecting cables

161, 162

Container sections of the connecting lines

165

Fastener of the container sections

170

partition wall

180

fastener

190

Side member of the vehicle

195

compensation line

196

free space

Claims (15)

An air spring arrangement (100) for a secondary air suspension between the vehicle body and bogie of a rail vehicle, comprising: a first connection line (121) for connecting a first additional air volume with a first air spring (131) and a second connection line (122) for connecting a second additional air volume with a second air spring (132); characterized in that the air spring assembly (100) further comprises: a compressed air tank (110) which provides a first additional air volume (111) and a second additional air volume (112) separated from the first additional air volume (111), the first connecting line (121) being connected to the first additional air volume (111) and the second connecting line (111) 122) is connectable to the second additional air volume (112), a first port (141) for connecting the first communication passage (121) to the first auxiliary air volume (111) and a second port (142) for connecting the second communication passage (122) to the second auxiliary air volume (112), both ports (141; 142) on the same side of the compressed air tank (110) or on the same side of the first additional air volume (111) and the second additional air volume (112) separating separator (170), are arranged the compressed air tank (110) on the car body or on the bogie of a rail vehicle fastened, in particular exchangeable fastened, is. The air spring assembly of claim 1, wherein the first connection line (121) and the second connection line (122) are in fluid communication with each other. The air spring assembly of any one of the preceding claims, wherein the first connection line (121) and the second connection line (122) are in fluid communication via an orifice or control valve (150) for limiting a fluidic flow between the first and second supplemental air volumes. The air spring arrangement according to one of the preceding claims, wherein at least the second connecting line (122) has a container section (162) extending inside the compressed air tank (110). The air spring arrangement according to one of the preceding claims, wherein the compressed air tank (110) has two dished ends (113, 114) and wherein the first connection (141) and the second connection (142) are connected to the compressed air tank (110) at the same dished bottom (114) are. The air spring arrangement according to one of the preceding claims, wherein the first additional air volume (111) and the second additional air volume (112) of the compressed air tank (110) are separated within the compressed air tank (110) by a partition wall (170), in particular a displaceable partition wall. The air spring assembly of claim 6, wherein the compressed air tank (110) has a longitudinal direction (115) and a transverse direction (117), and wherein the partition wall (170) extends substantially transversely in the compressed air tank (110). The air spring assembly according to one of the preceding claims, wherein a container portion (161) of the first connection line (121) and a container portion (162) of the second connection line (122) respectively within the compressed air tank (110) extend and wherein within the compressed air tank (110) extending Container portion (161) of the first connecting line (121) and extending within the compressed air tank (110) container portion (162) of the second connecting line (122) have approximately the same length, in particular a difference in length of not more than 15% - 20% based on the longer of the two inside the compressed air tank (110) extending container portions (161, 162). The air spring assembly according to any of the preceding claims, wherein a tank portion (161) of the first connection pipe (121) and a tank portion (162) of the second connection pipe (122) extend within the compressed air tank (110), and wherein the tank portion (161) of the first connection pipe (161) 121) and the container portion (162) of the second connection line (122) are secured together within the compressed air tank (110). The air spring arrangement according to one of the preceding claims, wherein the compressed air tank (110) has a circular cylindrical shape with an outside diameter D and at least one of the two front ends of the compressed air tank (110) is formed by a dished bottom, wherein the first and second connection (141; 142) are arranged on the dished bottom in a region with a radius of 0.4 × D about a longitudinal axis (115) of the compressed air tank (110), the first and second connections (141, 142) being at the same or a different distance from the longitudinal axis (115). can have. The air spring assembly according to one of the preceding claims, wherein the compressed air tank (110) has more than two additional air volumes, and wherein each additional air volume of the compressed air tank (110) is connected to a respective connecting line for an air spring of a secondary suspension between the car body and the turn position of a rail vehicle. A rail vehicle having a secondary suspension between the bogie and the rail car body comprising, per bogie, a first air spring (131) and a second air spring (132), the rail vehicle having a receptacle for an air spring assembly (100) according to any one of the preceding claims. Rail vehicle according to claim 12, wherein the receptacle allows attachment of the compressed air tank (110) of the air spring assembly (100) on the car body or on the bogie of the rail vehicle. A method for supplying air springs (131, 132) of a secondary suspension between the vehicle body and bogie of a rail vehicle, comprising: Providing a first compressed air connection (121) between a first additional air volume (111) of a compressed air tank (110) and a first air spring (131) of a secondary suspension; Providing a second compressed air connection (122) between a second additional air volume (112) of the same compressed air tank (110) separated from the first additional air volume (111) and a second air spring (131) of the secondary suspension; Connecting the first compressed air connection (121) to the first additional air volume (111) on one side of the compressed air tank (110) and connecting the second compressed air connection (122) to the second additional air volume (112) on the same side of the compressed air tank (110) or on the same side of a the first additional air volume (111) and the second additional air volume (112) separating separator (170). The method of claim 14, further comprising providing a fluidic connection, controlled by a shutter or an adjustable valve, between the first compressed air connection (121) and the second compressed air connection (122) for regulating the flow of compressed air between the first and second compressed air connections.

Images