JP2008069634A - Soundproof device of generating set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To require extremely low noise and reduction in the installation area per unit output, in a generating set stored in a soundproof package. <P>SOLUTION: A duct is arranged in parallel in an upper position of the soundproof package. An air introducing port communicating with the soundproof package is arranged in a substantially intermediate position of the duct, and a ventilation outlet communicating with an external part is arranged in the upper position substantially opposed to this air introducing port. The air introducing port and the ventilation outlet are separated by a vane, and are formed as an intake side muffling duct and an exhaust side muffling duct. Intake side and exhaust side noise characteristics can also be adjusted by movably constituting the vane in the duct. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a soundproofing device for a power generation device, and more particularly to a soundproofing package structure in a power supply vehicle.

  Power supply vehicles equipped with power generators are equipped with a fan on the direct rotation shaft of the prime mover or power generator to ensure the ventilation required for the power generator, and the noise generated by the prime mover, power generator and fan is aspirated. Leak outside the soundproof package from the mouth and exhaust port. In order to suppress this noise, a silencing duct is provided integrally with the package to enhance the silencing effect. Such a soundproofing device is known from Patent Literature 1 and Patent Literature 2.

FIG. 3 is publicly known from Japanese Patent Application Laid-Open No. H11-260260. According to this, a generator 2 and an engine 3 as a prime mover are directly connected to a chassis 1 of a vehicle. The cooling and combustion air is introduced from the intake port 5 of the package 4 through the intake side duct 6 into the generator and the engine room as shown by the arrows, and is supplied to the cooling and combustion. The engine 1 is provided with a radiator 7, and is configured to be discharged to the outside through an exhaust side duct 8 delivered from the radiator 7.
Also in Patent Document 2, the basic configuration of the air inflow and outflow paths is the same as that of Patent Document 2.
JP 2003-264957 A Japanese Utility Model Publication No. 7-10427

  With regard to the required performance for the package, the demand for noise reduction has been increased in conjunction with the recent heightened environmental awareness, and the performance improvement of the power generator itself is required in synergy with this noise reduction. That is, in the conventional power supply car, what is 75 dB (A) of a general low noise specification is required, but the noise of 70 dB (A) or less is required for noise.

  In addition, because the power generation equipment has been shifted to a large size due to the power situation, in order to install the power generation equipment in the power supply car, how to minimize the installation area per unit output is a problem. It has become. With the package structure of Patent Document 1 or 2, it is possible to achieve an output capacity of about 500 kW of the generator, but if the output capacity exceeds that, the desired low noise specification cannot be supported.

  Accordingly, an object of the present invention is to provide a soundproof package capable of increasing the output capacity.

According to the first aspect of the present invention, air is introduced into the soundproof package in which the power generation apparatus is housed via the intake-side silencer duct, the introduced air is sucked by the ventilation fan, and the exhaust-side silencer duct is used. In what is configured to exhaust to the outside,
A duct is provided in parallel with the upper position of the soundproof package, an air introduction port leading to the soundproof package is provided at a substantially intermediate position of the duct, and a ventilation outlet leading to the outside is provided at an upper position substantially opposite to the air introduction port. The air inlet and the ventilation outlet are separated by a vane, and the duct is formed into an intake side silencing duct and an exhaust side silencing duct, and the vane is configured to be movable in the duct. .

  According to a second aspect of the present invention, the vane includes a wall portion formed to be inclined with respect to the height direction of the duct, and an upper plate that is connected to the wall portion and slides on the upper surface and the lower surface of the duct. And a lower plate.

As described above, according to the present invention, since the intake-side silencer duct, the exhaust-side silencer duct, and the vane have an integrated structure, the length of the duct can be shortened with a simple structure. In addition, the reduction of the ventilation resistance enables the consumption of the ventilation fan power to be reduced, and the generator efficiency is improved. As a result, it is possible to reduce the size of the soundproof package or increase the power generation capacity.
In addition, since the vane is slidable, even when the intake and exhaust noise specifications are changed, it is possible to respond immediately.

  FIG. 1 is a partial view showing an embodiment of the present invention. Reference numeral 10 denotes a subframe installed on the chassis of the vehicle, 11 denotes an engine, 12 denotes a generator, and the engine 11 and the generator 12 are directly connected by a coupling shaft and fixed to the subframe 1 (vehicle chassis). Reference numeral 13 denotes a package. The package 13 is provided with an air inlet 13a on the upper side of the substantially central position of the engine 11 and the generator 12 that are integrally coupled. 14 is a radiator, 15 is a ventilation fan, and 16 is a duct attached to the ceiling of the package 13, which has dimensions substantially equal to the lateral dimensions of the package 13 and is provided in the package 13. A ventilation outlet 16a is provided at a position substantially opposite to the air outlet 16a.

  Reference numeral 17 denotes a vane, in which an air inlet 13 a and a ventilation outlet 16 a are provided as a partition in the duct 16, and an intake side silencing duct 16 b and an exhaust side silencing duct 16 c are formed with respect to the duct 16. As this vane 17 is shown in the partial view of FIG. 2, since the intake side silencing duct 16b and the exhaust side silencing duct 16c are separated from each other in the duct 16, the vane 17 is inclined with respect to the height direction of the duct. And the upper plate portion 17b and the lower plate portion 17c formed so as to be in contact with the upper and bottom portions of the duct, respectively, so as to be slidable.

  Thereby, for example, by sliding to the right in the drawing, a part of the air inlet 13a is blocked and the ventilation outlet 16a is enlarged, and by sliding to the left in the drawing, a part of the ventilation outlet 16a is blocked to air. It is comprised so that the inlet 13a can be expanded.

  In the configuration as described above, the air flow during the operation of the power generation apparatus is sucked into the package 13 through the ventilation port 18, the duct 16b, and the air introduction port 13a, and is used for cooling and combustion. The heated air is sucked into the ventilation fan 15 and discharged to the outside through the exhaust-side silencer duct 16c and the ventilation outlet 16a.

  According to the present invention, since the intake side and the exhaust side are separated by a single vane 17 from a single linear duct, the duct structure is simplified, and the lengths of the intake side silencing duct 16b and the exhaust side silencing duct 16c are increased. The length can be made relatively long, the ventilation resistance is reduced, the ventilation efficiency is improved, and the package 13 can be reduced in the case of the same power generation capacity. The reduction of ventilation resistance contributes to the reduction of the ventilation fan power, and the power consumption of the power generation device is reduced, so that the generator efficiency is improved.

In noise reduction design, it is necessary to consider the noise on the intake side and the exhaust side, respectively, but the noise characteristics do not match the design calculation values and an error occurs. Therefore, although generally designed with a margin, in the present invention, the length of the silencer duct on the intake side and the exhaust side can be changed by sliding the vane 17, so that the most suitable noise characteristics and It becomes possible to do. In other words, the noise margin on the intake side and exhaust side is designed to be as small as possible, and if either one has overspec, the vane is moved to the intake side or exhaust side to change the length of the muffler duct and mute It is possible to change the effect and make uniform noise while measuring noise. On the other hand, for example, when it is desired to reduce noise only on the exhaust side, it is possible to take measures such as increasing the duct length on the exhaust side.

The block diagram which shows embodiment of this invention. The block diagram of a vane. The side view of a mobile power supply car.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Subframe 11 ... Engine 12 ... Generator 13 ... Package 13a ... Air introduction port 14 ... Raeta 15 ... Ventilation fan 16 ... Duct 16a ... Ventilation exit 16b ... Intake side silencing duct 16c ... Exhaust side silencing duct 17 ... Vane 17a … Wall 17b… Upper plate 17c… Lower plate

Claims (2)

A structure that introduces air into the soundproof package that houses the power generation device via the intake-side silencer duct, sucks the introduced air with the ventilation fan, and exhausts it outside through the exhaust-side silencer duct In
A duct is provided in parallel with the upper position of the soundproof package, an air introduction port leading to the soundproof package is provided at a substantially middle position of the duct, and a ventilation outlet leading to the outside is provided at an upper position substantially opposite to the air introduction port. The air introduction port and the ventilation outlet are separated by a vane to form the duct as an intake side silencing duct and an exhaust side silencing duct, and the vane is configured to be movable in the duct. Soundproofing device. The vane is composed of a wall portion that is inclined with respect to the height direction of the duct, and an upper plate and a lower plate that are connected to the wall portion and slide on the upper and lower surfaces of the duct, respectively. The soundproofing device for a power generator according to claim 1.

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