JP3654700B2 - Silent intake filter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a silenced intake filter device used for a gas turbine that is difficult to propagate noise to the outside or an air conditioner that requires low noise.
[0002]
[Prior art]
In order to prevent noise from being transmitted upstream or downstream, a conventional intake filter device connected to a blower or a compressor is generally provided with a silencer in a duct connected to the intake filter device. And this silencer has been selected and used for each device according to the air flow rate of the intake filter and the volume reduction to be reduced by the intake filter system.
However, if there was no suitable silencer, it was necessary to design a new silencer suitable for the air flow and volume reduction. FIG. 9 shows a case where such a silencer is used.
FIG. 2 is a schematic configuration diagram showing the device configuration in this case. In the intake filter device 10, a primary filter 11 and a secondary filter 12 are attached to a primary filter attachment frame 13 and a secondary filter attachment frame 14, respectively. The silencer 15 is manufactured in advance separately from the intake filter device 10 and is connected between the intake filter device 10 and a duct 16 connected to a noise source such as a compressor or a blower.
[0003]
[Problems to be solved by the invention]
The silencer 15 used in such an intake filter device 10 is required to reduce the noise from the noise source as much as possible and minimize the propagation of the noise, while reducing the size of the devices and the area occupied by the device. Is required to be minimized. However, in the prior art, the intake filter device 10 and the silencer 15 are separately manufactured and assembled and used at the installation site. Therefore, since each device is an independent device, there is a disadvantage that the entire device becomes large, and the manufacturing cost increases.
Accordingly, an object of the present invention is to reduce the size of devices and minimize the area occupied by the devices.
Another object of the present invention is to facilitate the design and construction of a silenced intake filter device.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized in that a silencer is provided in a filter chamber having a filter.
Further, the present invention is characterized in that a primary filter and a secondary filter are provided in a filter chamber, and a silencer is provided between the primary filter and the secondary filter.
According to the present invention, in each of the above means, the ventilation cross-sectional dimension of the silencer is preferably substantially equal to the ventilation cross-sectional dimension in the filter chamber.
According to the present invention, a plurality of filters and a plurality of silencers are juxtaposed in the width direction and the height direction, respectively, and the ventilation cross-sectional dimension of the filter and the ventilation cross-sectional dimension of the silencer are substantially equal. And the same number of silencers.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, by providing the silencer in the filter chamber, it is not necessary to separately connect the silencer, and the entire apparatus can be reduced in size.
[0006]
Further, according to the present invention, when the filter chamber has the primary filter and the secondary filter, the entire apparatus can be reduced in size similarly to the above by providing the silencer between the primary filter and the secondary filter. In addition, it is possible to provide an apparatus that can be easily maintained and inspected. That is, since it is better not to provide a door for inspection downstream of the secondary filter because it is necessary to maintain airtightness, if a silencer is provided downstream of the secondary filter, inspection of the silencer This is done after removing the secondary filter. However, since it is possible to provide an appropriate inspection door on the side of the filter chamber between the primary filter and the secondary filter, maintenance can be performed by installing a silencer between the primary filter and the secondary filter. This makes it possible to provide an easy device.
[0007]
Further, according to the present invention, by making the ventilation cross-sectional dimension of the silencer substantially equal to the ventilation cross-sectional dimension in the filter chamber, the length of the filter chamber is suppressed to a necessary minimum length, and the overall size of the apparatus is reduced. be able to. That is, if the ventilation cross-sectional dimension of the silencer is different from the ventilation cross-sectional dimension of the intake filter, a taper duct connecting both of them is required. However, the ventilation cross-sectional dimension of the silencer should be matched with the ventilation cross-sectional dimension in the filter chamber. Thus, since such a taper duct is not required, the entire apparatus can be reduced in size.
[0008]
In the present invention, the ventilation cross-sectional dimension of the filter and the ventilation cross-sectional dimension of the silencer are made substantially equal, and the number of the filter and the silencer is the same. Therefore, since one silencer corresponds to one filter, it is possible to facilitate the design and construction of the silenced intake filter device. That is, the passing wind speed (surface wind speed) in the filter is about 3 m / s in the case of a high-performance filter and is about 1/2 to 1/3 of the surface wind speed of the silencer. Furthermore, the standard size of the filter used in the intake filter device is 610 mm wide x 610 mm high, and several filters are stacked in the width direction and height direction to form the filter part. Therefore, when both are combined, it is very difficult to make the external dimensions the same. Therefore, by preparing in advance several types of silencers corresponding to the filter and the ventilation cross-sectional dimension and differing by the length dimension, silencers having different length dimensions can be used in combination in accordance with the required volume reduction.
[0009]
【Example】
A silencer intake filter device according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view showing a schematic configuration of the apparatus. As shown in the figure, a primary filter 3, a secondary filter 4, and a silencer 5 are provided in the filter chamber 2 of the intake filter device 1 in that order from the air intake side. A plurality of these primary filters 3, secondary filters 4, and silencers 5 are attached in parallel to the primary filter mounting frame 6, the secondary filter mounting frame 7, and the silencer support frame 8, respectively. The cross-sectional dimension is substantially equal to the ventilation cross-sectional dimension in the filter chamber 2. The silencer 5 is provided adjacent to the downstream side of the secondary filter 4. The filter chamber 2 is provided with a connection flange 2a for connecting to the duct. An inspection door 9 is provided on the side surface of the filter chamber 2 between the primary filter 3 and the secondary filter 4.
In the above configuration, air is sucked from the primary filter 3, cleaned by the secondary filter 4, and flows through the silencer 5 to the duct connected to the connection flange 2 a.
[0010]
Next, the mounting structure of the silencer 5 will be described with reference to FIGS. FIG. 2 is a side sectional view of the main part of the silencer 5 viewed in parallel to the air flow direction in the filter chamber 2, and FIG. . The silencer 5 is supported and arranged by a silencer support frame 8 provided in contact with the secondary filter support frame 7. The silencers 5 stacked in the width direction and the height direction are connected by a connecting bolt 5a so that the position is not shifted by an external force such as an air flow or an earthquake. The silencer 5 is fixed to the filter chamber 2 by a silencer fixing bracket 8a and a fastening bolt 8b.
[0011]
The structure of the silencer 5 will be described below with reference to the drawings. Silencers include an internally bonded duct type in which a sound absorbing material is internally bonded as shown in FIGS. 4 and 5 and a split type as shown in FIGS. 6 and 7. 4 and 6 are side sectional views of the silencer 5 viewed in parallel to the air flow direction, and FIGS. 5 and 7 are front sectional views viewed perpendicular to the air flow direction. These silencers are generally constructed by attaching a sound absorbing material 5c such as glass wool in a silencer case 5b made of iron plate. Although not shown, the ventilation surface of the sound absorbing material 5c is covered with a glass cloth or a punching plate to prevent the sound absorbing material from scattering.
[0012]
Next, the mounting structure of the secondary filter 4 will be described with reference to FIG. FIG. 8 is an exploded perspective view of main parts showing the secondary filter 4 and the secondary filter mounting frame 7. As shown in the figure, the secondary filter 4 is provided with a filter retainer 4a having a through hole, and the secondary filter mounting frame 7 is provided with a filter support 7a and a filter tightening bolt 7b. In the figure, reference numeral 4b denotes a tightening nut that fits with the filter tightening bolt 7b. Since the secondary filters 4 are attached using the filter tightening bolts 7b as described above, a slight space is provided above, below, and to the left and right of each secondary filter 4.
[0013]
In the above configuration, when the secondary filter 4 is attached to the secondary filter attachment frame 7, the secondary filter 4 is brought into contact with the secondary filter attachment frame 7 while sliding along the filter support 7a. At this time, the filter tightening bolt 7b is inserted into the through hole of the filter retainer 4a. Then, the tightening nut 4b is screwed into the filter tightening bolt 7b, and the secondary filter 4 is mounted in pressure contact with the secondary filter mounting frame 7.
[0014]
In the above-described embodiment, the primary filter 3, the secondary filter 4, and the silencer 5 have been described as being arranged in parallel in the width direction and the height direction. There is no need to be. In addition, although the ventilation cross-sectional dimensions of the primary filter 3, the secondary filter 4, and the silencer 5 are substantially equal to the ventilation cross-sectional dimensions in the filter chamber 2, here, the primary filter 3, the secondary filter, The ventilation cross-sectional dimensions of the filter 4 and the silencer 5 are not limited to the cross-section through which the air can pass, but actually depend on members such as the primary filter mounting frame 6, the secondary filter mounting frame 7, and the silencer support frame 8. Is the dimension including the part where the wind is blocked.
[0015]
Further, the secondary filter 4 and the silencer 5 have the same ventilation cross-sectional dimension as the ventilation cross-sectional dimension in the filter chamber 2 and are configured with the same number so that one silencer can be provided for one filter. Will respond. At this time, it is possible to make the width and height of one silencer the same as the width and height of one filter. However, in general, since the filters are installed with filter tightening bolts as in the above embodiment, spaces are provided on the top, bottom, left and right of each filter, while silencers can be stacked directly on top, bottom, left and right. Therefore, it is necessary to increase the dimensions (width and height) accordingly. For example, for a normally used filter of 610 mm square, the outer dimension of the silencer is preferably about 630 to 650 mm square. Therefore, even if the outer dimensions of each filter and each silencer are not necessarily the same, if one silencer corresponds to one filter, the design and construction of the silencer intake filter device can be facilitated. .
In addition, since a sound absorbing material can be attached to the inner surface of the filter chamber 2 to increase the silencing effect, the ventilation cross-sectional dimension of the silencer 5 does not necessarily match the ventilation cross-sectional dimension in the filter chamber 2.
In the above embodiment, the silencer 5 is described as being provided adjacent to the downstream side of the secondary filter 4. However, the silencer 5 is not necessarily provided adjacent to the downstream side of the secondary filter 4. And the secondary filter 4 may be provided.
Although not shown in the embodiment of FIG. 1, it is preferable to attach a hood or a weather louver to prevent rain from entering the entire surface of the primary filter on the air intake side.
[0016]
【The invention's effect】
In the present invention, by providing the silencer in the filter chamber, it is not necessary to separately connect the silencer, and the entire apparatus can be reduced in size.
Further, by providing the silencer between the primary filter and the secondary filter, it is possible to reduce the size of the entire apparatus as described above and provide an apparatus that can be easily maintained and inspected.
Further, according to the present invention, by making the ventilation cross-sectional dimension of the silencer substantially equal to the ventilation cross-sectional dimension in the filter chamber, the length of the filter chamber is suppressed to a necessary minimum length, and the overall size of the apparatus is reduced. be able to.
Further, according to the present invention, the ventilation cross-sectional dimension of the filter and the ventilation cross-sectional dimension of the silencer are substantially equal, and the number of the filters and the silencers is the same, so that the silencer intake filter device can be easily designed and constructed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic configuration of a silencer intake filter device according to an embodiment of the present invention. FIG. 2 is a side cross-sectional view of a main part of a silencer used in the device. FIG. 4 is a side sectional view showing the structure of a silencer according to an embodiment of the present invention. FIG. 5 is a front sectional view showing the structure of a silencer according to an embodiment of the present invention. FIG. 7 is a sectional side view showing the structure of a silencer according to another embodiment. FIG. 8 is a front sectional view showing the structure of a silencer according to another embodiment of the present invention. FIG. 9 is a schematic configuration diagram of a conventional silenced intake filter device.
1 Intake filter device 2 Filter chamber 3 Primary filter 4 Secondary filter 5 Silencer 6 Primary filter mounting frame 7 Secondary filter mounting frame 8 Silencer support frame

Claims (4)

A plurality of filters and a plurality of silencers are juxtaposed in the width direction and the height direction in the filter chamber, respectively, and the ventilation cross-sectional dimension of one filter and the ventilation cross-sectional dimension of one silencer are substantially equal. muffler intake air filter device according to claim. 2. The muffler intake air filter device according to claim 1, wherein the same number of filters and silencers are provided . Wherein the filter chamber is provided with a primary filter and a secondary filter, silencer intake filter device according to claim 1 or 2, characterized in that a said silencer between the primary filter and the secondary filter. The silenced intake filter device according to any one of claims 1 to 3 , wherein a total ventilation cross-sectional dimension of the silencer is substantially equal to a ventilation cross-sectional dimension in the filter chamber.

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