JPH0350253Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a muffler used for muffling engine exhaust gas.

"Prior Art" In general, the muffler has a structure having a bulging cavity in the shape of a closed cylinder with an exhaust gas inlet on one side and an exhaust gas outlet on the other side. Sound insulating barrier plates of various shapes are arranged randomly inside the chamber, and the introduced exhaust gas is made to collide with the sound insulating barrier plates and muffle the sound.

``Problems to be solved by the invention'' According to the muffler with the conventional structure described above, depending on the internal structure based on the shape and arrangement of the sound insulating barrier plate, the flow direction of exhaust gas, the vertical direction of the muffler, or the oblique position is prohibited. For example, mufflers for ships often have to be individually molded to accommodate the narrow stern space in which they are installed, resulting in high costs. In order to mold a complex internal structure, for example, when resin molding is performed, the bulging cavity is molded into multiple parts, such as three parts, and a sound insulating plate is attached to each part, and then the divided cavity parts are connected. It is necessary to mold the muffler into an integrated muffler, which has the disadvantage of poor moldability.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, and another purpose is to provide an improved muffler that effectively muffles noise with a simple internal structure.

``Means for solving problems'' The muffler of this invention achieves the above objectives.
"In a muffler comprising an exhaust gas inlet on one side, an exhaust gas outlet on the other side, and a muffler main part having a bulging cavity in the shape of a closed long cylinder, the muffler main part is provided with an exhaust gas outlet on the other side, and the muffler main part has an exhaust gas inlet on one side, an exhaust gas outlet on the other side, and a bulging cavity in the shape of a long cylinder. It consists of a pair of half main parts of the same shape and size divided by a plane passing through the diagonal of The structure is such that the sound insulating partition plates intersect diagonally with respect to the direction of introduction.

"Example" and "Operation" Hereinafter, the structure and operation of the muffler of the present invention will be explained in detail based on Examples. Referring to Figures 1 and 2, which show an embodiment applied to a water-cooled muffler for ships, the muffler of the present invention has an exhaust gas inlet on one side and an exhaust gas outlet on the other side. However, in a muffler consisting of a muffler main part 1 having a sealed elongated cylindrical bulging cavity part 2, the muffler main part 1 is a half main part divided by a plane passing through the diagonal line 3 of the muffler main part 2. It consists of a combination of 1A1B,
The half main part 1A1B has the same shape and size as the diagonal line 3
The half main part 1A1B is connected symmetrically about the axis, and at the corner of the other diagonal 3' that intersects with the diagonal 3.
The conduction port 4 of the half main part 1A is the inlet for the exhaust gas of the muffler, and the conduction port 4 of the half main part 1B is the exhaust gas outlet of the muffler. Half main part 1A1B
A sound insulating partition plate 5 that divides the bulging cavity 2 into two chambers along a diagonal line 3 is attached to the contact surface of the bulge.

Specifically, the half main portion 1A1B is arranged in a clockwise or counterclockwise direction on a plane passing through the diagonal line 3, that is, a plane passing through the vertical center line 10 of the bulging cavity portion 2 and perpendicular to the exhaust gas introduction direction indicated by the arrow A in the figure. It has a shape in which the bulging cavity 2 is equally divided left and right by a plane that is rotated and fixed along a diagonal line 3, and a flange part 6 for joining is formed along the dividing plane, and a flange part 6 is formed along the dividing plane. When the muffler 6 is joined, it has a shape in which a tubular conduction port 4 is protruded from the apex of the other diagonal line 3' of the bulging cavity 2 and extends forward and backward of the muffler, and the half main part 1A1B is completely Items of the same shape and size are combined symmetrically about the diagonal line 3.

The sound insulating partition plate 5 is an elongated elliptical plate with several gas holes 7 formed therein, and is clamped to the flange portion 6 of the joined half main portion 1A1B to form a bulging cavity of the muffler. It has a structure in which part 2 is diagonally divided into two parts.

The muffler of this embodiment is a water-cooled muffler for ships that introduces engine cooling water together with exhaust gas to cool and muffle the sound, so the half main part 1A1B and the sound insulation bulkhead plate 5 are both made of nonflammable resin containing glass fiber. It is molded from reinforced plastic, and the flange portions 6 of the joined half main portions 1A1B are airtightly connected by gluing or bolting.

The above-described muffler of the present invention consists of a combination of half main parts 1A1B divided by a plane passing through the diagonal 3, and a single sound insulating partition plate 5 is clamped to the joint surface, and the bulging cavity is Due to the symmetrical structure in which 2 is partitioned diagonally, the half main part 1A1 protrudes on both sides.
The conduction port 4 of B acts on either the gas inlet or the gas outlet of the muffler, and it can function normally as a muffler even if the entire muffler is placed in the opposite directions (front and back and up and down) or in an inclined position. Therefore, there are no restrictions on the mounting position or direction of the muffler,
The ease of installation is greatly improved as a marine muffler installed in a narrow stern space.

And half main part 1A or 1B of the same shape and size
Since it is possible to form a muffler by mass-producing and combining only the sound-insulating bulkhead plate 5 and the sound-insulating bulkhead plate 5, formability is significantly improved compared to the conventional structure described above, and together with the above-mentioned improvement in installation ease, muffler standards are met. This makes it possible to mass-produce the muffler, thereby stabilizing the performance of the muffler and reducing costs.

Furthermore, since the muffler of the present invention is configured with a sound insulating partition plate 5 that divides the bulging cavity 2 into two rooms along the diagonal line 3, as shown in FIG. The gas 8 collides with the sound insulating bulkhead plate 5 in an inclined position and is guided into the narrow cavity 2' existing at the end of the sound insulating bulkhead plate 5, causing reverse turbulence, so that the expansion and contraction of the exhaust gas 8 is caused by the expansion and contraction of the exhaust gas 8. 2, the sound is repeatedly reversed, and the simple structure consisting of a single sound insulating plate exhibits an effective sound damping effect.

Next, other embodiments of the muffler of the present invention will be described with reference to FIGS. 3 and 4. That is, FIG. 3 shows a structure consisting of the same half main portion 1A1B as in the embodiments of FIGS. 1 and 2, but in which the gas vents 7 of the sound insulating partition plate 5 are covered with a "jiyama board 9". Promote stirring and mixed flow of exhaust gas passing through the gas vent 7,
The silencing effect can be further improved. In addition, FIG. 4 shows a half main part 1A1B consisting of half cavities having the same symmetrical shape, in which the gas communication ports 4 are arranged symmetrically about the vertical center line 10. This is intended to improve the sound deadening effect by creating a reverse flow.

The muffler of the present invention is not only made of reinforced plastic as in the above embodiments, but may also be made of a metal plate, and can be applied to vehicles other than ships.

``Effects of the invention'' As explained above, the muffler of the invention has excellent installation and formability, reduces the cost of the muffler, and has a simple structure that provides excellent noise reduction function. It has a huge effect.

[Brief explanation of the drawing]

Figure 1: Shows a muffler according to an embodiment of the present invention, A
is its front view, B is its right side view, C is its top view, D is AA sectional view of A, E is BB sectional view of A,
F is a CC sectional view of C, Figure 2: A perspective view showing the combined state of the muffler of the embodiment in Figure 1, Figures 3 and 4: A front view showing the muffler of another embodiment of the present invention.Main symbols: 1A1B...Muffler half main part, 2...Bulging cavity part, 3...Diagonal line, 4...Conducting port, 5...Sound insulating partition plate, 6...Flange part, 7
...Gas vent, 8...Exhaust gas, 10...Vertical center line.

Claims (1)

[Scope of utility model registration request] In a muffler comprising an exhaust gas inlet on one side, an exhaust gas outlet on the other side, and a muffler main part having a bulging cavity in the form of a closed long cylinder, the muffler main part has an exhaust gas outlet in the bulging cavity. It consists of a pair of half-main parts of the same shape and size that are divided by a plane passing through a diagonal line, and is characterized by a structure in which a sound-insulating partition plate is clamped to the joining surface of the half-main parts to divide it into two rooms. Scarf.