DE3314039A1 - Ventilation system for electric locomotives - Google Patents

Abstract

The invention relates to a system for ventilating the dust-sensitive auxiliary operating devices and/or equipment accommodated in the machine room of an electric locomotive. Appropriate ventilation of all the equipment, machines and devices arranged in the interior of the vehicle is to be possible in a manner which is simple and expedient and does not cause much pollution. For this purpose, it is proposed that the ventilation should take place via a central cooling air preparation system (12) which sucks in external air and produces cooling air of different degrees of purity and produces a constant overpressure in the corridor (13) of the machine room and in particular sections (7, 8, 9, 10, 11a, 11b) of the vehicle, which sections hold the auxiliary operating devices and/or equipment sealed off from other parts of the interior of the vehicle. The particular advantages reside, inter alia, in the fact that the temperature of the machine room is only a few degrees Celsius above the external temperature because of a high rate of air change which is dependent on the overpressure and that no dirt can penetrate the machine room from the outside. A multiplicity of local small ventilation units can be avoided. <IMAGE>

Description

Ventilation system for electric locomotives

The invention relates to a system for ventilation as in The preamble of claim 1 is defined in more detail.

In the known ventilation systems carried out on electrical Locomotives were most of the devices, machinery and equipment in part are housed in separate sections in the engine room, mostly separate fans assigned to the ventilation from the prevailing engine room atmosphere forced. The supply air from the outside took place via side ventilation grilles (double nozzle grilles) on the vehicle, which, however, could only cause insufficient dust separation. Upstream filters were seen because of the risk of clogging and often around and inadequate Accessibility of permanent maintenance / not like before. The exhaust air was mostly mixed blown out partly upwards on the roof side and partly downwards on the underframe side. Inside the vehicle prevailed a constant negative pressure out of which contamination of the machine room and the units there cannot be avoided let. Only the large consumers such as traction motors, transformers, oil coolers and Braking resistors were ventilated separately from the outside via separate air ducts. In some cases, space-consuming and aerodynamically unfavorable solutions resulted. the The temperature in the vehicle was / in general considerable due to the lack of a change of air inside higher than that of the outside air, which often led to premature failure of components.

Although these shortcomings were well known, newer ones have also been identified Constructions no basic and economic measures taken against it.

So it has been tried to reduce the air loss in the machine room to cover by the fact that the Fahrmotorlüfterh on the pressure side via a bypass some of the air was diverted. However, the amount of air was not enough To cover air losses, let alone build up an overpressure, the entry of dust could have prevented. The energy consumption made the matter uneconomical.

The object of the invention is to correct the identified deficiencies and in a simple and practical way, low-pollution, meaningful ventilation for all to enable devices, machines and facilities arranged in the vehicle interior, taking from the theoretical knowledge of the expediency of an overpressure atmosphere is assumed in the engine room.

For a ventilation system, the task at hand is that mentioned at the beginning Kind according to the characterizing features of claim 1 solved.

Appropriate refinements of the invention are set out in the subclaims can be found in connection with the supplementary description.

The invention is illustrated by means of schematic exemplary embodiments explained in more detail.

1 and 2 show an electric locomotive in side view and top view showing the air ducts. The top view is without the locomotive roof.

3 shows an air treatment system.

Can be seen in Fig. 1, the grids 1 to 6 for the cooling air enters consumers such as traction motors with inverters, rectifiers with braking resistors, DC link chokes and transformer cooler. The grids can vary depending on Filter requirement be mere protective grille or double nozzle ventilation grille. here only the part of the device that is sensitive to dust is of interest, specifically it is so-called auxiliary equipment and devices such as control devices, switching devices, Auxiliaries converter. These are cf. Fig. 2 in sealed sections 7, 8, 9, 10, 11a, 11b housed and connect to the roof for sealing. These Sections are supplied centrally from the also sealed section 11, in which a cooling air preparation system 12 is arranged. The cooling air treatment system 12 is described in detail in FIG. The cooling air inlet is marked with E, the cooling air outlet from roof fans with A 'or A "or A (for the motor exhaust air) on the vehicle chassis side. At 13 there is still the engine room corridor and with 14 indicated another breakthrough. The guidance of the purified air is dash-dotted, that of the finest filtered air with colons / dashes denotes the latter to the air conditioning in the driver's cabs at the head of the locomotive. Further reference symbols can be found in the description of FIG. 3.

Fig. 3 shows the central air treatment system i in more detail. Behind the protective grille 5 there is a fan 15 within the section 11, which the dusty outside air initially a self-cleaning, highly effective, dynamic, maintenance-free air filter 16 feeds, which also entrained water droplets separates. The remaining dust air with up to 95% dust / up to> 15 / µm particle size then goes outside via line 17 and the already highly purified air that possibly still contains suspended matter, is via line 18 into the sub-sections lla and 11b with the roof fans A ', in which the auxiliary converters are located, blown. Part of the pre-cleaned air goes through a fine filter 19 (mat or band filter) and is blown freely into the engine room aisle 13 via lines 20. From there the individual sections are supplied with cooling air for the supply of the air conditioning systems or particularly sensitive system parts, as indicated by the arrows in Fig. 2 can be seen. For this purpose, reference is made to the colon / dashed lines in FIG. 2. The ultra-fine filter 19 is easily exchangeable.

In the engine room aisle 13, in connection with roof ventilators Ar, A '' as well as leaks and flow losses an overpressure of approx. 30 Pa can be achieved. The control cabinets in sections 9 and 10 are also ventilated from Machine room aisle 13 through a floor duct 21. The cooling air can also be there Stroke from bottom to top without forming hot spots. There it will, however not routed to the outside through a roof ventilator, as is usually the case, but rather overhead through a / side opening 14 in a section 22 or 23, which is also the drive motor fan contains. You will benefit from these sucked off and blown out downwards via A.

The following advantages are achieved with the system according to the invention: The engine room temperature is only a few degrees Celsius above the outside temperature because of a high air exchange rate dependent on overpressure.

No dirt penetrates the engine room from the outside.

The targeted flow through the equipment framework, the control cabinets on the rear walls of the driver's cab, among other things, from bottom to top with cool air does not allow any Hot spots arise, which has a positive effect on the service life of all devices.

A large number of locally small fan units can be avoided.

In the cold season, a temperature monitor can be used for a corresponding adjustment of the fan output of the fan of the central air handling unit to be taken care of.

Claims (5)

Claims 1. System for ventilation in the engine room one electric locomotive housed dust-sensitive auxiliary equipment and / or devices, characterized in that the ventilation is sucked in via outside air central cooling air preparation system (12) c follows which cooling air different Degree of purity as well as a constant overpressure in the engine room aisle (13) and in special vehicle sections (7, 8, 9, 10, lla, llb) generated, which the auxiliary operating facilities and / or devices in a sealing manner against other parts of the vehicle interior. 2. System according to claim 1, characterized in that pre-cleaned Air routed through special pipes / ducts into the normal ventilation sections is and finely filtered air via the engine room aisle (13) as a reservoir and Breakthroughs near the floor for sections with special electronics or Air conditioning is available. 3. System according to claim 1 or 2, characterized in that the Cooling air treatment system (12) in a vehicle section that is sealed off for itself (11) is arranged and consists of a pressure fan (15), the outside air in a first stage via a maintenance-free air cleaner (16) and in a second stage presses through a fine filter (19), with connections (18, 20) in each step are intended for air delivery. 4. System according to claims 1 to 3, characterized and finely filtered net that the pre-cleaned / cooling air the sections to be cooled from bottom to top flows through and is generally guided to the outside via roof ventilators (A = A "). 5. System according to claims 1 to 3, characterized in that the cooling air for the control cabinets (section 9 or 10) via an upper opening (14) to a traction motor section (22 or 23) and from there over the down exhausting (A) drive motor fan is extracted.