CN213478455U

CN213478455U - Exhaust device for piston type internal combustion engine

Info

Publication number: CN213478455U
Application number: CN202121115684.1U
Authority: CN
Inventors: 佟雷; 佟宝义
Original assignee: Shenyang Shenfei Special Equipment Co ltd
Current assignee: Shenyang Shenfei Special Equipment Co ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-06-18
Anticipated expiration: 2031-05-24

Abstract

The utility model relates to an exhaust apparatus technical field specifically is an exhaust apparatus for piston internal-combustion engine, including the blast pipe, install the hush pipe on the blast pipe, set firmly radial baffle in the hush pipe, radial baffle separates into preceding cavity and back cavity with the hush pipe, axial baffle has set firmly axial baffle on the radial baffle, axial baffle separates into two half cavitys with preceding cavity, be equipped with the expansion pipe in the half cavity, be equipped with the spiral channel that becomes gradually big to back cavity direction diameter in the expansion pipe, radial baffle sets firmly respectively with the pipe of two half cavitys intercommunication, the one end of keeping away from radial baffle on the pipe is to the slope of axial baffle direction. The utility model discloses compact structure, the installation is maintained conveniently, encloses the helical passage that synthetic acoustic impedance is discontinuous and the diameter grow gradually through reducing helical blade and expansion pipe for the part acoustic energy is collided with the reducing helical blade and is converted into thermal energy and dispels in the internal-combustion engine exhaust, and noise reduction of pipe effect is showing.

Description

Exhaust device for piston type internal combustion engine

Technical Field

The utility model relates to an exhaust apparatus technical field specifically is an exhaust apparatus for piston internal-combustion engine.

Background

During the exhaust stroke of the piston internal combustion engine, the exhaust gas in the cylinder enters an exhaust manifold through an exhaust valve, then enters an exhaust pipe, a catalytic converter and a silencer through the exhaust manifold, and finally is exhausted to the atmosphere through an exhaust tail pipe. The muffler functions to reduce exhaust noise. In order to reduce the noise of the exhaust of the internal combustion engine and eliminate the flame and spark in the exhaust gas, a silencer is generally arranged at the outlet of the exhaust pipe, so that the exhaust gas enters the atmosphere after being silenced.

The utility model provides a utility model with publication number CN205823405U provides a blast pipe structure of car, and it includes the blast pipe pipeline, is provided with three way catalyst converter and gas vent on the blast pipe pipeline, and the gas vent includes the aiutage, is provided with the inner tube in the aiutage, is provided with the amortization stick on the center pin of inner tube, is provided with the recess on the amortization stick, is provided with noise cancelling material on the recess. The utility model discloses a reach the purpose of making an uproar of falling through amortization stick and amortization material, the noise cancelling effect is not obvious, and the dismouting degree of difficulty of amortization material is great moreover, is not convenient for install and maintain.

Disclosure of Invention

An object of the utility model is to provide an exhaust apparatus for piston internal-combustion engine to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an exhaust apparatus for piston internal-combustion engine, includes the blast pipe, install in hush pipe on the blast pipe, set firmly radial partition in the hush pipe, radial partition will before hush pipe separates into cavity and back cavity, axial baffle has set firmly on the radial partition, axial baffle will two half cavities are separated into to preceding cavity, be equipped with the expansion pipe in the half cavity, be equipped with in the expansion pipe to the spiral channel that back cavity direction diameter gradually becomes big, set firmly respectively with the pipe of two half cavity intercommunications on the radial partition, keep away from on the pipe radial partition's one end to the slope of axial partition direction.

Optionally, the outer wall fixed connection of expansion pipe the axial baffle, just the internal diameter of expansion pipe back cavity direction grow gradually, be equipped with the polished rod in the expansion pipe, set firmly the diameter on the polished rod to the reducing spiral leaf of back cavity direction grow gradually, the reducing spiral leaf with the inner wall of expansion pipe encloses synthetically helical passage.

Optionally, after the two ends of the polish rod extend out of the expansion pipe, a first support and a second support are fixedly connected to the two ends of the polish rod respectively, and the first support and the second support are fixedly connected to the axial partition plate.

Optionally, the silencing pipe includes two half shells that are mirror symmetry, and the butt department of two half shells has seted up along the groove, it is equipped with the sealing strip to inlay in the groove along.

Optionally, the two ends of the half shell are integrally formed with half flange plates, the half flange plates are connected with the exhaust pipe through flange bolts, the half shell is integrally formed with buckling seats, and the buckling seats are provided with reserved bolt holes.

Optionally, an included angle between the axis of the circular tube and the plane where the radial partition plate is located is 5-10 degrees, and tube surfaces at two ends of the circular tube are vertical surfaces.

Compared with the prior art, the utility model provides an exhaust apparatus for piston internal-combustion engine possesses following beneficial effect:

1. the utility model has compact structure and convenient installation and maintenance, and the spiral channel with discontinuous synthesized acoustic impedance and gradually increased diameter is enclosed by the reducing spiral blade and the expansion pipe, so that part of acoustic energy in the exhaust of the internal combustion engine collides with the reducing spiral blade and is converted into heat energy to be dissipated, and the noise reduction effect of the silencing pipe is obvious;

2. the utility model discloses an one end of keeping away from radial baffle on two pipes is simultaneously to the slope of axial baffle direction for the internal-combustion engine exhaust relative impact of outflow pipe, partial sound energy is through gaseous clash and become the thermal energy consumption and dispel, reaches the effect that the formation secondary was fallen and is fallen.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

fig. 2 is a schematic structural view of the middle muffler pipe of the present invention.

In the figure: 1. an exhaust pipe; 2. a sound-deadening tube; 201. a half shell; 202. a half flange plate; 203. along the groove; 204. a front cavity; 205. a rear cavity; 206. a spiral channel; 207. a buckle seat; 3. a radial spacer; 4. an axial spacer; 5. an expansion tube; 6. a circular tube; 7. a polish rod; 8. a variable diameter helical blade; 9. a first bracket; 10. a second bracket; 11. a sealing strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): referring to fig. 1 and 2, the present invention provides an exhaust apparatus for a piston type internal combustion engine, including an exhaust pipe 1, and a muffler pipe 2 installed on the exhaust pipe 1. The silencing pipe 2 is formed by combining two half shells 201 which are in mirror symmetry, a buckling seat 207 is integrally formed on each half shell 201, a reserved bolt hole is formed in each buckling seat 207 and used for accommodating the installation of a bolt connecting pair, and the two half shells 201 are fixedly connected into a whole through the bolt connecting pair. Half flange 202 is formed integrally at both ends of half shell 201, and half flange 202 is connected with exhaust pipe 1 through flange bolt. The butt joint of two half shells 201 is seted up along groove 203, inlays in the groove 203 and is equipped with sealing strip 11 for the junction of two half shells 201 realizes the high sealed of hush pipe 2, and hush pipe 2 is waterproof to separate gas effectually.

The inner wall of the silencing pipe 2 is welded with a radial clapboard 3, the silencing pipe 2 is divided into a front cavity 204 and a rear cavity 205 by the radial clapboard 3, the radial clapboard 3 is welded with an axial clapboard 4, the front cavity 204 is divided into two half cavities by the axial clapboard 4, and expansion pipes 5 are arranged in the half cavities. The outer wall of expansion pipe 5 and axial baffle 4 welding, and the internal diameter of expansion pipe 5 is crescent to cavity 205 direction behind, is equipped with in the expansion pipe 5 to cavity 205 direction diameter spiral channel 206 that the diameter gradually becomes big behind, is equipped with polished rod 7 in the expansion pipe 5, and the both ends of polished rod 7 stretch out respectively fixedly connected with first support 9 and second support 10 behind the expansion pipe 5, and first support 9 and second support 10 all weld with axial baffle 4. The polish rod 7 is fixedly provided with a reducing spiral blade 8 with the diameter gradually increasing towards the direction of the rear cavity 205, and the spiral channel 206 is enclosed by the reducing spiral blade 8 and the inner wall of the expansion pipe 5.

In the embodiment, the exhaust gas of the internal combustion engine enters the front cavity 204 of the silencing pipe 2 from the exhaust pipe 1, the exhaust gas of the internal combustion engine strictly advances along the spiral channel 206 and changes in a continuous spiral direction in the front cavity 204, part of sound energy is converted into heat energy through collision with the reducing spiral blades 8 and dissipated, so that the sound wave passing through the silencer is obviously weakened, namely the spiral channel 206 with discontinuous acoustic impedance and gradually increased diameter is formed by the reducing spiral blades 8 and the expansion pipe 5, and the silencing pipe 2 has a good noise reduction effect. The expansion pipe 5 and the reducing spiral blade 8 in the silencing pipe 2 are simple to install and convenient to maintain.

The radial partition plate 3 is welded with a circular tube 6 respectively communicated with the two half cavities, and one end of the circular tube 6, which is far away from the radial partition plate 3, inclines towards the axial partition plate 4. The included angle between the axis of the circular tube 6 and the plane of the radial clapboard 3 is 5-10 degrees, preferably 8 degrees, and the tube surfaces at the two ends of the circular tube 6 are vertical surfaces.

In the embodiment, the exhaust gas of the internal combustion engine flowing out from the front cavity 204 enters the rear cavity 205 from the circular tubes 6, and because one ends of the two circular tubes 6 far away from the radial partition plate 3 are inclined towards the axial partition plate 4, the exhaust gas of the internal combustion engine flowing out of the circular tubes 6 is relatively impacted, part of sound energy is converted into heat energy through gas collision and dissipated, and the effect of secondary noise reduction is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An exhaust apparatus for a piston type internal combustion engine, comprising an exhaust pipe (1), a muffler pipe (2) mounted on the exhaust pipe (1), characterized in that: the utility model discloses a silencer, including muffler pipe (2), radial baffle (3) have set firmly, radial baffle (3) will muffler pipe (2) are separated into preceding cavity (204) and back cavity (205), axial baffle (4) have set firmly on radial baffle (3), axial baffle (4) will two half cavities are separated into to preceding cavity (204), be equipped with expansion pipe (5) in the half cavity, be equipped with in expansion pipe (5) to spiral channel (206) that back cavity (205) direction diameter gradually becomes big gradually, set firmly pipe (6) with two half cavity intercommunications on radial baffle (3) respectively, keep away from on pipe (6) the one end of radial baffle (3) to axial baffle (4) direction slope.

2. An exhaust arrangement for a piston internal combustion engine according to claim 1, characterised in that: the outer wall fixed connection of expansion pipe (5) axial baffle (4), just the internal diameter of expansion pipe (5) back cavity (205) direction grow gradually, be equipped with polished rod (7) in expansion pipe (5), it is directly radial to have set firmly on polished rod (7) back cavity (205) direction change diameter spiral leaf (8) that grow gradually, change diameter spiral leaf (8) with the inner wall of expansion pipe (5) encloses synthetically spiral passage (206).

3. An exhaust arrangement for a piston internal combustion engine according to claim 2, characterised in that: the two ends of the polish rod (7) extend out of the expansion pipe (5) and then are fixedly connected with a first support (9) and a second support (10) respectively, and the first support (9) and the second support (10) are fixedly connected with the axial partition plate (4).

4. An exhaust arrangement for a piston internal combustion engine according to claim 1, characterised in that: the silencing pipe (2) comprises two half shells (201) which are in mirror symmetry, an edge groove (203) is formed in the butt joint of the two half shells (201), and a sealing strip (11) is embedded in the edge groove (203).

5. An exhaust arrangement for a piston internal combustion engine according to claim 4, characterised in that: the semi-shell structure is characterized in that semi-flange plates (202) are integrally formed at two ends of the semi-shell (201), the semi-flange plates (202) are connected with the exhaust pipe (1) through flange bolts, buckling seats (207) are integrally formed on the semi-shell (201), and reserved bolt holes are formed in the buckling seats (207).

6. An exhaust arrangement for a piston internal combustion engine according to claim 1, characterised in that: the included angle between the axis of the circular tube (6) and the plane where the radial partition plate (3) is located is 5-10 degrees, and the tube surfaces at the two ends of the circular tube (6) are vertical surfaces.