JPS6246805Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a silencer.

[Prior art] Various developments regarding silencers have been made in the past, such as Utility Model Application No. 54-68045 and Utility Model Application No. 68045.
No. 55-67308, No. 56-31612, No. 58-
No. 30710, Jitko No. 47-11223, Jitko No. 56-42408
No. 56-42409, etc. are known as known techniques.

[Problems to be solved by the invention] This invention has a structure that is as simple as possible and prevents noise without complicating the structure, and noise reduction is achieved by making exhaust gases interfere with each other. As a result, it is an object of the present invention to provide a muffler that has a high muffling effect and is easy to manufacture.

[Means for solving problems] Next, the configuration of the present invention will be explained.

An inlet part 10 and an outlet part 1 are provided at both ends of the outer case 1, respectively.
2 and the above-mentioned both parts 10 and 1 are installed inside the outer case 1.
A cylindrical body 13 communicating with the cylindrical body 2 is provided, and a perforated plate 6 having a through hole through which the cylindrical body 13 is inserted is installed approximately in the center of the outer case 1, thereby dividing the inside of the outer case 1 into two and inflating. Two chambers 7 and 8 are provided, and a shielding plate 14 is provided in the cylinder body 13 closer to the discharge part 12, and a perforated plate 15 is provided on the introduction part 10 side at a constant distance from the shielding plate 14. are provided to form a wide interference chamber 16 within the cylinder 13, and a large number of small holes 17 are formed in the cylinder 13 at a position close to the introduction part 10 side corresponding to both expansion chambers 7 and 8 and at a position close to the discharge part 12. ..., 18... are formed by drilling them.

[Function] The present invention has the above-mentioned configuration, and when used, it is used in the same way as a conventional muffler. To explain the function of the present invention with reference to the embodiment shown in Fig. 1, the exhaust gas is Cylindrical body 13 from introduction pipe 9
A small portion passes through the small hole 17 and enters the expansion chamber 7.
However, most of it reaches the perforated plate 15 of the interference chamber 16. Here, there are some that bounce off the crosspiece part of the perforated plate 15 (i.e., the part without holes), and some that pass through the small holes and reach the shielding plate 14. It hits the shielding plate 14 and is reflected back to the perforated plate 15, but in this case too, some of it passes through the holes of the perforated plate 15, and some of it bounces off the crosspiece, and the exhaust gas noise interferes with each other in a complicated manner. The sound is mostly muted. In this case, as described above, the noise of the exhaust gas that hits the crosspiece of the perforated plate 15 or the shielding plate 14 and is reflected and returns is muffled by interference with the noise of the newly incoming exhaust gas. Next, the reduced noise of the exhaust gas further passes through the small holes 17 provided on the introduction part 10 side of the cylindrical body 13 and expands into the expansion chamber 7, and further expands into the perforated plate 6. It is compressed through the small hole, enters the next expansion chamber 8, and expands.
It passes through the small holes 18 of the cylindrical body 13 and is discharged from the discharge section 12 with almost no sound.

[Example] Next, an example of the present invention will be described based on the drawings.

First, the embodiment shown in FIG. 1 will be described.Both cylinders 2 and 3 are joined via a perforated plate 6 between the flanges 4 and 5 of the two bottomed cylinders 2 and 3 constituting the outer case 1, and the outer The inside of the case 1 is divided into two expansion chambers 7 and 8, and an introduction part 10 into which an introduction pipe 11 is inserted is provided at one end of the outer case 1, and an ejection part 12 having an evacuation pipe 11 at the other end. A cylindrical body 13 having an opening that communicates with the section 10 and the discharge section 12 is installed through the perforated plate 6, with one opening connected to the introduction pipe 9 and the other end connected to the discharge pipe 11. None, a shielding plate 14 is provided in the cylinder body 13 at a position close to the discharge part 12, and a perforated plate 15 is provided on the introduction part 10 side at an appropriate distance from the shielding plate 14 to prevent noise inside the cylinder body 13. Interference chamber 16 large enough to allow comrades to interfere and attenuate each other
A large number of small holes 17 are formed in a part of the cylinder body 13 near the introduction part 10 side, and a large number of small holes 18 are formed in a part near the other discharge part 12 side. be. Note that glass wool or the like may be filled between the shielding plate 14 and the perforated plate 15.

In addition, as shown in FIG. 2, the introduction part 10 of the outer case 1
When the introduction pipe 9 is inserted in a direction perpendicular to the longitudinal direction of the outer case 1, and the discharge pipe 11 is also provided in a direction perpendicular to the longitudinal direction, the partition wall 19 is inserted to form the introduction part 10 and the discharge part 12. , 20 are provided at two locations, and small holes 21 are provided near both openings of the cylinder 13.
... may be provided in large numbers.

[Effects of the invention] Since the present invention has the above-mentioned configuration, the structure is extremely simple, making it easy to manufacture.Moreover, noise reduction is highly effective due to the complex interference between noises, and the cylinder By adjusting the interference chamber in the body to match the engine in which it is used, it can be used in a variety of engines with the same structure, and the noise of the exhaust gas can be expanded, compressed, and twisted with the above-mentioned effects. It has extremely remarkable effects, such as nearly complete noise reduction.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Outer case, 6... Perforated plate, 7, 8... Expansion chamber, 10... Introducing part, 12... Discharge part, 13...
... Cylindrical body, 14 ... Shielding plate, 15 ... Perforated plate, 16
...Interference room, 17, 18...small hole.

Claims (1)

[Scope of utility model registration request] An inlet part 10 and an outlet part 1 are provided at both ends of the outer case 1, respectively.
2 and the above-mentioned both parts 10 and 1 are installed inside the outer case 1.
A cylindrical body 13 communicating with the cylindrical body 2 is provided, and a perforated plate 6 having a through hole through which the cylindrical body 13 is inserted is installed approximately in the center of the outer case 1, thereby dividing the inside of the outer case 1 into two and inflating. Two chambers 7 and 8 are provided, and a shielding plate 14 is provided in the cylinder body 13 closer to the discharge part 12, and a perforated plate 15 is provided on the introduction part 10 side at a constant distance from the shielding plate 14. are provided to form a wide interference chamber 16 within the cylinder 13, and a large number of small holes 17 are formed in the cylinder 13 at a position close to the introduction part 10 side corresponding to both expansion chambers 7 and 8 and at a position close to the discharge part 12. A silencer characterized by having ..., 18... perforated therein.