EP0625456B1 - Device for ventilating at least one traction motor and/or one cooling system of a railway traction unit and railway traction unit provided with such a device - Google Patents

Abstract

The device contains at least one fan (20) which is arranged in the vehicle body (1) of the rail traction unit and is connected to an air duct (17, 18) which is assigned to the traction motor (8) and/or to a cooling system (12) for assemblies (13). The air duct (17, 18) is provided over at least part of its length, e.g. in a suction-side section (17a, 18a, 43, 44) with panelling (38, 38a, 38b) which consists of a mat made of a sound-absorbing material. By means of the panelling (38, 38a, 38b) it is possible to achieve effective reduction in particular of the noise of the air of the fan (20) which is emitted in the direction of flow and counter to the direction of flow of the cooled air, and of the noise of flow within the air duct (17, 18). The device is mainly provided for use on railway traction units with high driving powers. <IMAGE>

Description

The invention relates to a device according to the Preamble of claim 1 and a Rail locomotive with such a device.

A provided with devices of the type mentioned Rail locomotive is described in the publication "Die Locomotives 2000 - Series 460 - the Swiss Bundesbahnen "(special print by the Swiss Eisenbahn-Revue 10/1991, pages 9, 28 and 44). The known locomotive contains four fans for Ventilate four in pairs in two bogies arranged traction motors and two fans for Ventilation of oil coolers for those arranged in the vehicle body Auxiliary units, in particular converter systems and one Transformer. The fans are each in the vehicle body above the traction motor or the oil cooler between a suction side and a pressure side section an air duct arranged.

In another known device of the type mentioned the fans are each in one at the bottom of the Supported vehicle body, from bottom to top flowable air duct arranged, the Converter and converter units below the Fan in a suction section of the Air duct are attached. The cooling air is extracted from the Engine room through below the vehicle floor arranged oil cooler and by the converter and Power converter units are sucked in and in the roof area of the Vehicle carried outside (Glasers Annalen, volume 111 No. 4, April 1987, Berlin, pages 107-114).

In such rail vehicles, which for high Cooling is required for the drive power the throughput of the traction motors and the auxiliary units relatively large amounts of cooling air. Due to the in existing vehicles, relatively cramped spatial relationships, which the interpretation of the Fans and the flowable cross sections of the Limit air channels, there are relatively high Flow rates of the cooling air, which at least at times, e.g. at high outside temperatures and / or at Operation at full power, at appropriate Can cause noise emissions. Such noise emissions were previously accepted or, in the case of disturbing noise when the vehicle is at a standstill, by Switching back of the fans reduced. Such however, is an arbitrary reduction in fan performance hardly applicable to high performance vehicles described type, their auxiliary units, in particular the Semiconductor elements of the converter system, also in Standstill phases require adequate cooling. A correspondingly intensive ventilation also require Auxiliary units of other traction vehicles, such as water coolers and compressors for railcars or diesel locomotives.

In a railcar known from US-A-2,667,843 Diesel engines located below the vehicle floor and auxiliary units arranged in the roof area are the Diesel engines each via a vertical air intake line with an air cooler arranged in the roof area connected and each to a leading against the roof area, exhaust pipe provided with a silencer connected. The air intake and exhaust pipes are in two the floor, the passenger compartment and the roof area of the railcar vertically penetrating channels arranged, which are each double-walled, whereby the space between the double walls with a filled with heat-insulating and soundproofing material is to reduce the heat and noise pollution of the passenger compartment to minimize. The attachment of an air and Exhaust channels surrounding additional sound-absorbing Formwork requires a relatively large amount of construction work and would, especially with high performance vehicles from large amounts of cooling air to through air ducts, a correspondingly larger part of the existing Take up space. With the known arrangement is also a reduction in the air duct after Noise radiated outside cannot be achieved.

The invention has for its object a further developed especially in this regard To provide ventilation device which essentially within the by the design of the locomotive given dimensions of the installation space - if necessary as a replacement for an existing one Ventilation device - built into the vehicle body can be and which with little construction effort, especially without significant changes in the environment of the Installation space of the device, a reduction in Noise emissions guaranteed.

According to the invention, this object is achieved by that the air duct is at least part of its length with a liner facing the air flow is provided with a sound absorbing material.

The inventive design of the device allows a targeted reduction of the radiated Noise, in particular the airborne noise emitted by the Fan and the "flow noise" within the Air duct. Through the design according to the invention at least that largest emission level device or Devices is thus a significant reduction in the Ventilation noises can be achieved. The inventive Device also allows a simple Retrofitting an existing vehicle. Given External dimensions of the air duct can be determined by the lining according to the invention, although the flowable Cross section reduced and thus the Flow rate of the cooling air increased accordingly will; however, this apparent disadvantage is caused by the achievable sound-absorbing effect of the lining both in the direction of flow and against Flow direction of the cooling air more than weighed. To in certain sections of the air duct, e.g. in the Area of a constructively given narrowing, a undesirable reduction in the cross-section that can be flowed through to avoid the canal section in question without Liner executed and this in one for it better appropriate section can be arranged.

Embodiments of the subject matter of the invention are in the dependent claims.

An essential part of the counter flow direction the noise emitted by the cooling air can, according to claim 2 be reduced in that at least part of the Lining in a suction section of the air duct is arranged.

The embodiment according to claim 3 enables an effective Reduction of one that arises especially in the intake area Noise share, which over the in the roof area arranged suction port is emitted and which therefore in a different way, such as those provided by the railway Noise barriers, as a rule, cannot be reduced. The hood part provided in the roof cavity can be in one any, for optimal absorption of airborne sound favorable form, especially with a flowable Cross section that is larger than that limited by the space in the vehicle body Cross section of the below the roof cavity itself continuing part of the air duct. The hood part can also with a length effective for sound absorption be carried out according to the size of the flowable cross section can be optimized.

By the arrangement provided according to claim 4 at least one parallel to the direction of flow running guide element is the hood part divided like a backdrop, so that for absorption effective surface corresponding to the airborne sound enlarged and thus a correspondingly improved Noise reduction can be achieved.

The lining designed according to claim 5 stands out in particular from the fact that as an absorption material foam used at low frequencies, e.g. in a range of approximately 200 Hz, a relatively high one Airborne sound absorption effect ensured, in which mentioned area e.g. an absorption degree α greater than 0.3 can be achieved. The foam material used is also fire retardant and moisture resistant as well especially insensitive to abrasion, so that at low maintenance and high operational reliability Lining ensures and especially a burden the environment by abrasion of the lining can.

By executing according to claim 6 can without essential Impairment of the airborne sound absorption effect reliable installation of the lining in the air duct be achieved.

The execution of the lining according to claim 7 especially for channel sections with relatively complicated Suitable and permitted spatial and / or cross-sectional shapes an optimal use of the spatial shape of the person concerned Section of the air duct.

The embodiment according to claim 8 enables simple Way an increase in airborne sound absorption effective surface of the lining and thus a corresponding improvement in sound absorption within of the air duct through which it flows.

The embodiment according to claim 9 is particularly for Arrangement in the outlet area of the pressure side section suitable for the air duct, with this also in Flow direction of the cooling air last duct section one effective sound absorption can be achieved. This execution also allows an orientation of the lamellar Guide element against the longitudinal center of the Rail locomotive and thereby enables one Exploitation of the sound absorption effect between the Rail sections located on rails.

Fig. 1

ein mit erfindungsgemässen Vorrichtungen versehenes Schienentriebfahrzeug in einer Seitenansicht mit einem Teilschnitt entsprechend der Linie I-I in Fig. 2;

Fig. 2

das Schienentriebfahrzeug nach Fig. 1 in einem Horizontalschnitt entsprechend der Linie II-II in Fig. 1;

Fig. 3

das Schienentriebfahrzeug in einem Querschnitt entsprechend der Linie III-III in Fig. 2;

Fig. 4

eine Einzelheit einer erfindungsgemässen Vorrichtung nach einer abgewandelten Ausführungsform in einem Querschnitt.

Further details emerge from the following description of an exemplary embodiment according to the invention, shown schematically in the drawing, in conjunction with the claims. Show it:

Fig. 1

a side view of a rail locomotive provided with devices according to the invention with a partial section along the line II in Fig. 2;

Fig. 2

the rail locomotive of Figure 1 in a horizontal section along the line II-II in Fig. 1.

Fig. 3

the rail locomotive in a cross section along the line III-III in Fig. 2;

Fig. 4

a detail of a device according to the invention according to a modified embodiment in a cross section.

The one shown in Figs. 1 and 2 Rail locomotive, an electric locomotive, contains a vehicle body 1 on two bogies 2 and 3 is supported. The bogies 2 and 3 included two drive wheel sets 4 and 5 or 6 and 7, each with one in the relevant bogie 2 or 3 Drive motor 8 are coupled. In the vehicle body 1 are four devices 10 for ventilation one each Traction motors 4, 5, 6 and 7 and two devices 11 for Ventilating two cooling devices 12, which one group each of auxiliary units to be cooled (Auxiliary operations) 13 are assigned. The in Fig. 2nd Auxiliary units 13 indicated by dashed lines can Converter systems 13a, 13b, 13c and electronic control cabinets 14a, 14b and a compressor-condenser unit 15, for example for air conditioning for the driver’s cab, and a transformer 16 (Fig. 1) and others, not shown apparatus include. The cooling devices 12 as shown, each contain two oil coolers 12a and 12b, which in a known, not shown manner to the auxiliary units 13 to be cooled are connected. It it is understood that another version of the Cooling device 12 also several oil coolers or possibly have only a single oil cooler can. Instead of oil coolers, others can also Aggregates, e.g. Water cooler to be provided.

The ventilation devices 10 and 11 are each above the ventilating traction motor 4, 5, 6, 7 or the one to be ventilated Cooling device 12 arranged in a tower-like structure, the one essentially vertical, the shown execution from top to bottom flowable air channel 17 and 18 and one in this arranged fan 20 contains. The air channels 17 and 18 each have at least one of the Suction side of the fan 20 assigned suction side Section 17a or 18a and at least one pressure side Section 17b or 18b, 18c, 18d. The suction side Sections 17a and 18a of the air channels 17, 18 are each on a trained in the roof area of the vehicle body 1, vaulted roof cavity 21 connected, the not shown electrical roof apparatus and the High voltage connection between two in the roof area arranged pantographs 22 contains. The roof area is with side inlet openings 23 for the supply of Cooling air running through the filter elements 24 in the Roof cavity 21 is sucked, which one over the Length of the roof area contiguous Air calming room forms.

The roof vault 21 is delimited by a floor 25 which with openings 26 and 27 for the upper ends of the suction-side sections 17a and 18a of the air channels 17, 18 is provided. The pressure side sections 17a of the Air channels 17 are each on a floor section 28 of the Vehicle body 1 supported and via a movable Connector 30 to an air inlet connector 31 of the to be ventilated traction motor 8 connected. As Connector 30 can be shown as one flexible bellows can be provided, which from the Turning and deflection movements of the bogie 2 or 3 resulting relative movements of the traction motor 8 compared to the vehicle body 1. The print side Sections 18b, 18c and 18d of the air channels 18 are each over the oil coolers 12a and 12b on the bottom section 28 supported, the end portions 18d each by a Opening in the bottom part 28 passed and with exit opening 32 directed against the track section are arranged.

The fans 20 are each in a support section 17f or 18f, as shown between the suction and pressure-side sections 17a and 17b or 18a and 18b, the air duct 17 and 18 arranged and each with one vertically arranged motor 34 coupled, which in a Bracket, as shown by radial ribs 35, in Air duct 17 and 18 is held.

The air channels 17 and 18 are each by supporting, in substantially cylindrical walls 36 and 37 and in the Sections 17a and 18a by tapered Wall parts 36a and 37a are formed, which e.g. made of sheet steel can exist. The air channels 17 and 18 are also each at least over part of its length, as shown in each of the sections 17a, 17b and 18a, 18b, 18c and 18d with a lining 38 from one provided sound absorbing material. In the illustrated For example, liners 38 are essentially through plate-shaped mats made of an open-cell foam, e.g. Polyether. As in particular from FIG. 3 emerges, the linings 38 depending on the Airflow facing side with a cover 40 be provided which has openings 41. This can without appreciable impairment of the airborne sound absorption effect a reliable installation of the Linings 38 are guaranteed. In particular, can a detachment and release of particles of the prevents sound absorbing material and thus the Formation of deposits in the air channels 17, 18 or a corresponding pollution of the environment avoided will. The cover 40 can, as shown, by a perforated sheet metal are formed, to achieve a sufficient absorption effect the sum of the areas of the Breakthroughs 41 expediently at least 30% of the Airflow facing surface of liner 38 corresponds.

The liner 38 can also be made from another Foam, e.g. a polymer, such as polyester, Polyurethane, or other material, e.g. one Fabric mat or a felt-like rock wool mat or mineral fibers. The cover 40 can also formed by or on a slotted sheet other ways, e.g. in the form of a wire mesh, one Siebes or the like. Depending on the strength, Density and / or dimensional stability of the used The material of the lining 38 can, if necessary can also be carried out without cover 40.

Above the floor 25 of the roof cavity 21 are tunnel-like Hood parts 43 and 44 arranged, each one of the Through openings 26 and 27 and the upper end of the Cover the relevant air duct 17 or 18 roof-like. The hood parts 43 and 44 each form an essentially flowable in the longitudinal direction of the vehicle body 1, the inlet duct assigned to the air duct 17 or 18 at least one suction opening 45, as shown two two suction openings 45 arranged at both ends, for which Cooling air.

The one with an almost triangular flow Cross-section hood part 43 and the one approximately trapezoidal cross-section Hood part 44 each contain a load-bearing wall construction 46, as shown in the form of a channel-like sheet metal or Plastic part, and are also each with one Lining 38 made of the sound absorbing material as well provided with an inner cover 40. The hood parts 43 and 44 can each in any, for optimal Absorption of airborne sound of favorable shape and size, e.g. also with a rectangular or semicircular flowable cross section. The Hood parts 43 and 44 can each be in particular with a larger flow-through cross section than the subsequent channel section 17a or 18a. Further can also be the effective lengths for sound absorption the hood parts 43 and 44 depending on the size of the flowable cross-section optimized accordingly be, with a relatively large flowable Cross section, like that of the hood part 44, a correspondingly longer length required. Instead of one Hood part 43, 44 can also be a corresponding channel piece with closed, e.g. circular cross section be provided.

As can be seen in particular from FIG. 3, the Hood parts 43 and 44 each with at least one parallel to Flow, ribbed or scenery-like guide element 47, which at least partially from the sound absorbing material consists. As shown, this or each Guide element 47 through a mat part made of the material the lining 38 may be formed, which in one of a Part of the inner cover 40 formed bracket is arranged. Deviating from the shown Designs can also be fitted with corresponding hood parts provided with several guide elements 47 or without Guide elements 47 may be executed.

The guide elements 47 allow a division of the flowable cross sections of the hood parts 43 and 44, which is effective for the absorption of airborne sound Surfaces enlarged accordingly and thus the effect the sound absorbing linings 38 on the walls the hood parts 43 and 44 can be reinforced. Accordingly, a significant reduction in the Rule dominating noise share achievable, that of the Intake openings 45, counter to the flow direction of the Cooling air is emitted.

To enlarge the airborne sound absorption effective surface of at least one of the air channels 17 and 18 can be in at least one channel section, as shown in each case on the fan 20 duct section 17b or 18b adjoining the pressure side, an inner liner 38a may be provided which in a distance from which the cooling air can flow Lining 38 of wall 36 on the bracket of motor 34 is attached. The linings 38a shown each also contain a mat from the sound absorbing material between two Covers 40 is held. Appropriate linings 38a can be in any section of the air ducts 17 or 18 may be arranged. Such a lining 38a can in particular also be arranged in a channel section be, whose wall 36 has no lining 38. It is a version is also possible in which several, e.g. concentrically arranged linings 38a are provided are.

To increase the effective for sound absorption Surface can also be in at least one of the air channels 17, 18 at least one cross-section through which the air can flow dividing, lamellar guide element 48 for the Cooling air can be arranged, which is also a mat the sound absorbing material of the lining 38 and contains two covers 40 surrounding them. In the shown version are the print side End sections 18d of the air channels 18 each with two such guide elements 48, which are arranged in the manner of a blind provided, also in this in the flow direction last channel section effective sound absorption guarantee. 3, the end portions 18d each against the longitudinal median plane of the vehicle body 1 angled and the guide elements 48 each with a appropriate inclination so that the out the cooling air exiting the oil coolers 12b accordingly deflected inside and thus a sound absorption effect the parts of the track between the rails can be exploited.

After a modified one shown in FIG. 4 Embodiment of the invention can be at least one Section 50 of an air duct with a liner 38b be provided by several in the direction of flow the cooling air successive, sandwich-like layered plate parts 51 is formed, each of one made of the sound absorbing material Mat are made. This version enables on easy way of attaching the liner 38b also in Channel sections with relatively complicated geometry and allows optimal use of the available Installation space.

An execution is also possible in which only one or individual of the air channels 17 and 18 with Linings 38 designed according to the invention is or are. An embodiment is also possible in which only individual ones, for the absorption of airborne sound preferably selected sections or only a certain one Section of one of the air channels 17, 18, e.g. one or some of the sections 17a, 18a, 18d and / or one of the Hood parts 43 and 44, with the inventive Lining are provided. On the other hand, they can or one of the examples shown unlined, for the absorption of airborne sound less effective sections 17f and / or 18f with one corresponding lining 38 may be provided.

After a modified, not shown Embodiment of the invention, for example in a railcar, the fans 20 can be arranged in the roof area and on the pressure side each to at least one according to the invention lined duct section to be connected. The Suction sides of the fans 20 can also be connected to one lined according to the invention - or one unclad - duct section connected or also directly with the inlet openings 23 for the Cooling air or with appropriate, e.g. in the field of Ceiling of the roof area arranged inlet openings, in Connect. According to a further embodiment can be flowed through from bottom to top with air channels suction openings arranged in the floor area and in Roof area arranged outlet openings provided and each with at least one lining 38 according to the invention be provided. Air ducts with at least one in the longitudinal or transverse direction of the vehicle body 1 oriented, e.g. via a side suction opening flowable section provided and each with at least a lining 38 may be provided. Instead of independent of one another, each of the traction motors 8 and / or assigned to an aggregate group Ventilation devices 10, 11 can e.g. with one not Diesel locomotive shown, a single Ventilation device can be provided, both for Cooling the traction motors as well as for cooling an oil or Water cooler and / or other units, e.g. one generator driven by the diesel engine, one Compressor or the like., Is determined and which also at least one with a lining according to the invention 38 provided channel section.

Die Vorrichtung enthält mindestens einen im Fahrzeugkasten 1 des Schienentriebfahrzeuges angeordneten Ventilator 20, der an einen dem Fahrmotor 8 und/oder einer Kühleinrichtung 12 für Hilfsaggregate 13 zugeordneten Luftkanal 17, 18 angeschlossen ist. Der Luftkanal 17, 18 ist zumindest auf einem Teil seiner Länge, z.B. in einem saugseitigen Abschnitt 17a, 18a 43, 44 mit einer Auskleidung 38, 38a 38b versehen, die aus einer Matte aus einem schallabsorbierenden Material besteht. Durch die Auskleidung 38, 38a, 38b ist eine wirksame Verminderung insbesondere des in Strömungsrichtung und entgegen der Strömungsrichtung der Kühlluft abgestrahlten Luftschalls des Ventilators 20 sowie des Strömungsrauschens innerhalb des Luftkanals 17, 18 erzielbar. Die Vorrichtung ist hauptsächlich für die Anwendung an Schienentriebfahrzeugen mit hohen Antriebsleistungen vorgesehen.

In summary, the invention can be described as follows:

The device contains at least one fan 20 arranged in the vehicle body 1 of the rail locomotive, which is connected to an air duct 17, 18 assigned to the traction motor 8 and / or a cooling device 12 for auxiliary units 13. The air duct 17, 18 is provided at least over part of its length, for example in a suction-side section 17a, 18a 43, 44 with a lining 38, 38a 38b, which consists of a mat made of a sound-absorbing material. The lining 38, 38a, 38b can be used to achieve an effective reduction, in particular of the airborne sound of the fan 20 radiated in the flow direction and counter to the flow direction of the cooling air, and of the flow noise within the air duct 17, 18. The device is primarily intended for use on rail vehicles with high drive power.

Claims (10)

1. Apparatus for the ventilation of at least one vehicle motor (8) and/or a cooler device (12) of a railway locomotive having a vehicle body (1) which contains a number of auxiliary aggregates (13) to be cooled, comprising at least one ventilator (20) which is connected to at least one air passage (17 or 18 respectively) which is associated with the vehicle motor (8) and/or the cooler device (12), characterised in that the air passage (17, 18) is provided with a lining (38, 38a, 38b) of a sound absorbing material facing the air flow at least along a portion of its length.
2. Apparatus in accordance with claim 1 comprising a section (17a, 18a, 50) of the air passage (17, 18) which is associated with the ventilator at the suction side, characterised in that at least a portion of the lining (38, 38b) is arranged in the suction side section (17a, 18a, 50) of the air passage (17, 18).
3. Apparatus in accordance with claim 2 comprising a roof cavity (21) which is formed in a roof part of the vehicle body (1) and which can receive a flow via at least one inlet opening (23) of the vehicle body (1) and a passage opening (26, 27) to the suction side of the ventilator (20) which is arranged in the base (25) of the roof cavity (21), characterised in that at least a portion of the suction side section (17a, 18a) of the air passage (17, 18) is formed in the shape of a hood part (43, 44) which covers the passage openings (26, 27) in the manner of a roof, through which a flow can pass substantially in the longitudinal direction of the vehicle body (1) and which has at least one induction opening (45) for the coolant air; and in that at least a portion of the lining (38) is arranged in this hood part (43, 44).
4. Apparatus in accordance with one of the preceding claims characterised in that the hood part (43, 44) is provided with at least one rib-like guide element (47) which extends parallel to the direction of flow, which projects into the cross-section of the hood part (43, 44) through which the flow can pass and which consists at least partly of the sound absorbing material of the lining (38).
5. Apparatus in accordance with one of the preceding claims characterised in that the lining (38, 38a, 38b) is formed by at least one plate-shaped mat which consists at least partly of an open-pored foam material, e.g. of polyether.
6. Apparatus in accordance with one of the preceding claims characterised in that on the side facing the air flow the lining (38, 38a, 38b) is provided with a cover (40) having cut-outs (41), e.g. in the form of a perforated metal sheet.
7. Apparatus in accordance with claim 5 or claim 6 characterised in that the lining (38b) is formed in the region of at least one longitudinal section (50) of the air passage (18) by successive parts (51) of the plate-shaped material which are stacked in the manner of a sandwich in the direction of flow.
8. Apparatus in accordance with one of the preceding claims characterised in that, in at least one longitudinal section (17b, 18b) of the air passage (17, 18), at least a portion of the lining (38a) is arranged at a distance from the wall (36, 37) of the air passage (17, 18) through which the coolant air can flow.
9. Apparatus in accordance with one of the preceding claims characterised in that, in at least one longitudinal section (18d) of the air passage (18), at least a portion of the lining (38) is formed of at least one lamella-shaped guide element (48) which subdivides the cross-section of the air passage (18) through which a flow can pass and which contains a portion of the sound absorbing material of the lining (38).
10. Locomotive with at least one apparatus in accordance with one of the preceding claims.

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