JPH0268261A - Diesel electric locomotive - Google Patents

Abstract

PURPOSE:To keep pressurization to each room constant as well as to prevent any dust from penetrating by pressurizing both engine and generator rooms with a constant speed motor driven pressure fan, and leading a flow of cooling air into the generator room by a separate blower via a duct via a suction duct for cooling the generator. CONSTITUTION:Both storage rooms 12, 13 for an engine 1 and a generator 2 driven this engine 1 are separated by a partition wall 11 with a bleeder. Air inhaled through a filter from the outside by a pressurizing fan 4 is made to flow into the generator room 13 and the engine room 12 from a vent hole installed in the partition wall 11, whereby the inside of both rooms 13, 12 are pressurized at almost constant pressure. On the other hand, an engine driven blower 3 feeds the inside of the generator 2 with a part of air inhaled through a filter 5 and a suction duct 6 via a duct 7, so that the generator 2 is cooled. Then, the air is exhausted out of an exhaust duct 8. Therefore both rooms 13, 12 are pressurized and maintained at constant pressure by the motor driven fan 4, and any penetration of duct due to pressure fluctuations is thus prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a diesel engine, and particularly relates to a diesel locomotive for desert areas where there are many dust 1-.

[Conventional technology]

Conventional diesel locomotives of this type were developed in 1986-114
As described in Publication No. 09, the vehicle is equipped with a blower that cools the onboard equipment and a pressurizing fan that protects the onboard equipment storage chamber from dust. This prevented dust from entering.

[Problem to be solved by the invention]

In the above conventional technology, since the cooling air for the generator is taken in from the storage chamber, the intake air volume of the generator changes depending on the engine rotation speed, and as a result, the air pressure in the storage chamber is kept constant by the pressurizing fan. I can't do it,
There was dust intrusion due to air pressure fluctuations.

A first object of the present invention is to solve the above-mentioned problems, and to pressurize a chamber housing an engine and a generator to a substantially constant pressure without being affected by the rotational speed of the engine, thereby preventing dust from entering. The second objective is to provide a diesel locomotive that can cool the engine using exhaust gas from the generator.

[Means to solve the problem]

The first purpose is to pressurize the chamber housing the generator and engine by installing a pressurizing fan driven by a constant speed motor, and the cooling air from the blower, which is separate from the pressurizing system, is passed through the suction duct. The generator is cooled through the engine, and its exhaust gas is led to an exhaust duct and discharged outside the vehicle.

Further, the second object is achieved by forming a generator room and an engine room that house a generator and an engine respectively and communicate with each other, and opening the exhaust duct of the generator to the outside of the vehicle through the engine room.

[Effect]

The generator is cooled by cooling air introduced from a separate system from the room housing the engine and generator, so the engine and generator housing compartment is kept almost constant by a pressurizing fan that rotates at a constant speed. can be pressurized to prevent dust from entering due to air pressure fluctuations.

A blower is often driven by an engine, and in this case, the blower discharges an air volume and air pressure depending on the rotational speed of the engine. When this is combined with the wind from a motor-driven fan, the flow and air volume change depending on the wind pressure, so the generator's cooling air is on the intake side.

Both exhaust sides are connected to the duct, and the structure is such that they do not mix together. Since the temperature of the engine is highest around the supercharger, we guided the generator exhaust duct to this area to efficiently absorb heat. To prevent oily air generated from the engine, a partition wall with a vent is installed between the engine room and the generator room, and the generator room and engine room are separated to prevent oily air from entering the generator room. I decided to do so.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3.

FIG. 1 is a front view showing an embodiment of the dustproof system for a diesel locomotive according to the present invention. In FIG. 1, there is a DC motor-driven pressure rise fan 4 that pressurizes the interior of an engine 1 and a generator 2 driven by the engine 1, and a blower 3 that cools the generator 2 and main motor 9. It consists of a filter 5.5' for dustproofing the intake air, a wind duct for sending cooling air to the equipment, and a vehicle body in which these equipment are mounted. The engine room 12 and the generator room 13 are separated by a partition wall 11 with a ventilation hole, and a fan 4
air sucked in from the outside through a dedicated filter 5' is discharged into the generator room 13. At the same time, the air flows into the engine compartment 12 from the vent provided in the partition wall 11, pressurizing the compartment 13.12 to a substantially constant pressure. On the other hand, the engine-driven blower 3 has a filter 5. A part of the air sucked through the suction duct 6 is sent into the generator 2 through the duct 7 to cool the generator 2. The wind that has cooled the generator 2 passes through the exhaust duct 8 and is then discharged outside the vehicle. A portion of the air from the blower 3 passes through the air passage to cool the main motor 9. Reference numeral 10 denotes a control box disposed in a separate room, which guides a portion of the pressurized air in the first generator room 13 for cooling.

FIG. 2 is a front view showing another embodiment of the present invention, in which the same parts as in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted. In FIG. 2, the exhaust air from the main blower 3 that has cooled the generator 2 is guided to the upper part of the engine compartment 12 through an exhaust duct 8, and heat is exchanged inside and outside the duct 8 to cool the engine compartment 12. After it is done, it is released outside the vehicle. That is, since the exhaust gas temperature of the first generator 2 is lower than that around the engine 1, the heat around the engine 1 is absorbed. In this case, in order to efficiently exchange heat inside and outside the duct 8, measures such as increasing the surface area are taken. Other details are the same as in FIG.

FIG. 3 is a front view showing still another embodiment of the present invention. In FIG. 3, a main rectifier 14 is provided on the discharge side of the fan 4 to cool it. The wind that has cooled the main rectifier 14 is blown into the generator room 13 and simultaneously flows into the engine room 12, pressurizing both rooms 13 and 12.

According to the embodiment described above, the ventilation system for cooling the generator 2, the main motor 9, etc. and the pressurization system are separate systems, so that the engine compartment 122 and generator compartment 13 are kept almost constant regardless of the notch of the engine 1. It can be pressurized to a certain level, and the intrusion of dust can always be prevented by keeping the required minimum pressure value.

In addition, the exhaust gas from the generator 2 can be used to cool the area around the engine compartment 12, which allows the materials and parts (lubricating oil, etc.) used in the engine compartment 12 to be cooled.

It is also possible to extend the life of rubber hoses, plastic materials, and other materials with poor heat resistance.

Conventionally, the capacity of the pressurerizing fan needs to be determined based on both the indoor pressurizing force and the cooling of the engine compartment, but according to this embodiment, the engine compartment 12 is cooled by the exhaust gas of the generator 2. As a result, the fan capacity can be determined only from the pressurizing force of the chambers 12 and 13. Therefore, the gap passing through each chamber 12 and 13 to the outside can be kept small, and the fan 4 can be set to a small capacity one. It can be done.

Furthermore, by reducing the opening gap to the outside of the car, it is possible to suppress dust when the locomotive is left under heavy load, such as at night, and it is possible to reduce the weight and the total amount of dust entering during operation.

Comparing this example with the conventional case of creating a certain amount of space between the outside of the vehicle and pressurizing the interior while cooling the engine.
The amount of air discharged into the chamber 12.13 is significantly reduced, which means that even though the air has passed through the filter 5',
There is some dust mixed in with the wind, and room 12.1
The amount of dust that falls into the chambers 12 and 13 due to the pressurized air inside the chamber 3 is also reduced compared to the conventional method, and in combination with the optimal pressurization method, the dust-proofing effect can be enhanced.

It is better for the pressure in chambers 12 and 1.3 to be high for the purpose of dust prevention, but if it is too high, the internal pressure may make it difficult to open and close the door, which may be dangerous, as well as waste of auxiliary machine horsepower. Therefore, it is best to keep it at the best value empirically.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to pressurize the generator room and the engine room to a substantially constant pressure with a small-capacity fan regardless of the engine notch, prevent dust from entering, and The generator is cooled by the wind from the blower, and the exhaust gas is then discharged outside the vehicle through a duct suitable for cooling the engine compartment, allowing the engine to be efficiently cooled and extending its lifespan. There is.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of a diesel locomotive according to the present invention, and FIGS. 2 and 3 are front views showing other embodiments of the present invention. 1...engine, 2...generator, 3...blower,
4...Fan, 5.5'...Filter, 6...
Suction duct 1-17...Duct, 8...Exhaust duct,
11... Bulkhead, 12... Engine room, 13... Generator room, 14... Main rectifier. Nagisa■ Concave δ---11-Ki Fuft High Map!

Claims (1)

[Claims] 1. A diesel locomotive consisting of a diesel engine, a generator driven by the diesel engine, and a chamber housing these, in which the generator chamber and the engine chamber are connected to each other by a fan driven by a constant speed motor. The cooling air from the blower in a system separate from the pressurizing system cools the generator through a suction duct, and the exhaust gas is led to an exhaust duct and discharged outside the vehicle. A distinctive diesel locomotive. 2. The diesel locomotive according to claim 1, further comprising a partition wall having a vent between the generator room and the engine room. 3. The diesel locomotive according to claim 1 or 2, wherein the exhaust duct is led to the engine room. 4. The diesel locomotive according to claim 1, wherein the exhaust duct is configured to exhaust air through an upper part of the engine compartment to cool the engine compartment. 5. The diesel engine according to claim 1 or 2, wherein part or all of the air from the fan is blown into the generator room through the main rectifier to cool the main rectifier. car.