CN2050075U - Safe energy-saving dissipative muffler for internal combustion engine exhaust - Google Patents

Abstract

The utility model relates to a safe energy-saving dissipative muffler for an automobile, a tractor, a power-driven third wheels, a motorcycle, a diesel locomotive and an internal combustion engine marine vehicle exhaust. The side face of a barrel is provided with an air intake pipe. An air exhaust pipe is arranged inside the barrel and in the center of a sealing cover. A fire protection pipe is fixed at the periphery of the air exhaust pipe. The dissipative muffler can make the discharged fume be smooth, without impact, continuous, equivalent, without spark and expelled in a rotary state. Fire safety is assured under the circumstance of without adding a fire prevention cap by adopting the dissipative muffler. Power loss is about 1% when load is full. Noise is lower than any other dissipative muffler. The discharge of CO and HC is lower than the other dissipative mufflers by 30%. The utility model has the advantages of simple structure and light weight. Effect is not impacted because of carbon deposit in long term using.

Description

Safe energy-saving dissipative muffler for internal combustion engine exhaust

The invention belongs to a kind of exhaust silencer for internal-combustion engine, particularly steam supply car, tractor, motor tricycle, motorcycle, internal combustion locomotive, internal-combustion engine boats and ships energy-saving safety silencer for exhaust.

Current, be used for the silencing apparatus on the various internal-combustion engines, general all is according to the energy that consumes blast air, and the noise-cancelling theory of balance stream pressure fluctuation, so on the structural design of silencing apparatus, all adopt repeatedly to make air communication cross the section that dwindles and enlarge, repeatedly change the direction of air-flow, or air-flow is divided into very little tributary along rough apparent motion.Though this structure can reach the noise elimination effect, obstructed because of exhaust, cause back pressure to increase, when engine peak speed, the output power loss can reach 5%～10%, and the speed of a motor vehicle is higher, and exhaust resistance is bigger, power loss the more, the also corresponding increase of energy consumption influences the power of internal-combustion engine.For example China is used to liberate 4 tons of load-carrying lorries of car CA-10B type silencing apparatus, and its preceding tube section is long-pending about 30% greater than the outlet pipe sectional area, makes that the speed of discharging air-flow increases, impedance increases, and not only reduces the noise elimination effect but also increase oil consumption.How to solve the noise elimination effect of silencing apparatus, the power of loss is a technical barrier for a short time.U.S. Pat S4203503 and US4209076 have proposed a kind of exhaust and have been introduced into the resonance chamber that absorbs acoustic energy, enter the expansion chamber of noise elimination energy then, enter the exhaust silencer in the atmosphere at last.But the silencing apparatus of this structure be have that exhaust is obstructed, exclusion is big, noise elimination weak effect, shortcoming that the power of IC engine loss is big.Example again, Chinese patent 85102140 has proposed the reducing shunting, three constant exhaust silencers.Be not ideal aspect the fuel-economizing noise elimination, moreover structure is complicated again, cost is higher again.The various silencing apparatuss of more than enumerating and present other various silencing apparatuss can not reduce the content of CO and HC, and all can not solve because of the unsafe problem of exhaust band fire, though add Flue isolation in addition, also still do not guarantee, have also increased cost and exhaust resistance in addition.

The objective of the invention is for automobile, tractor, motor tricycle, motorcycle, internal combustion locomotive, internal-combustion engine boats and ships etc. be equipped with a kind of safe, energy-conservation, noise is little, CO and HC is low, simple in structure, low back pressure eddy flow exhaust silencer.

Energy-saving safety silencer for exhaust of internal-combustion engine provided by the present invention is by bucket 1; The end socket 2 that links to each other with bucket, suction tude 3, capping 4; Form with outlet pipe 5, fire protection pipe 6 that capping 4 is fixed together.

To enter the flue gas of bucket in 1 and form good eddy flow and low back pressure in order to make, the diameter of bucket 1 adopts φ 60-600mm, and the 0.2-0.5 that equals its length doubly.

In order to reduce resistance and fire safety, in the central authorities of bucket 1 and capping 4, be provided with an outlet pipe 5, its length is not more than the length of bucket 1, and its diameter equals 0.1-0.5 times of bucket 1 diameter.Its part outside bucket 1 is provided with several exhaust ports, and periphery in this section is provided with fire protection pipe 6, its diameter be outlet pipe 5 diameters 1.1-1.5 doubly; Its length is 0.5-5 times of outlet pipe 5 length, in it and capping 4 joints, is provided with several ventilating holes.Bucket 1, end socket 2, capping 4 are formed a staving that envelope is close, make from suction tude 3 and enter the inwall rotation of the air-flow of silencing apparatus inner chamber along bucket 1, and Mars disappears in rotation, make the air-flow of discharging from motor not have impact, continuously, discharge by silencing apparatus equally.

The axis of the part of this silencing apparatus except suction tude 3, best on same straight line during installation.The internal diameter of suction tude 3 equals the external diameter of its institute's adapted engine exhaust pipe, and length is not limit.

In order to increase working life, each parts of silencing apparatus of the present invention all are to be made by metallic material or other heat-resistant material, available weldering between the part, buckle, riveting, sticking way combine.

The present invention has compared six with present other silencing apparatus and has changed advantages:

1. changed internal structure: promptly removed the porous core tube and the porous barrier of silencing apparatus inner chamber, only replaced with an outlet pipe, resistance is little, simple in structure.

2. changed the shape of air-flow: the dispersion air-flow that promptly becomes the silencing apparatus inner chamber is focused airflow, and resistance is little.

3. changed the direction of air-flow: become repeatedly impact, 180 ° widely different commentaries on classics air-flow is swirling eddy, is to reduce pressure gradually, slow down, cushion.So impact, vibration, eddy current, resistance are all very little, air-flow can be discharged continuously equally.Approaching under the effect of rotary centrifugal force because of the Mars in the flue gas again, the inwall of contact silencing apparatus and slow down and prolong time and flow process at inner chamber is so can disappear.

4. changed the sectional area of air-flow: make the sectional area that enters silencing apparatus inner chamber air-flow become big, rather than diminish.Make that air-flow is unobstructed, resistance, impact force be very little.

5. changed the structure of outlet pipe: promptly be provided with several apertures and a sleeve pipe on the outlet pipe outside staving, the remaining Mars of energy drag reduction, noise elimination and elimination.

6. the shape and the mode of exhaust airstream have been changed: promptly become and concentrate exhaust, become the exhaust of direct projection air-flow and be the swirling eddy exhaust, thereby reduced impact, vibration and resistance, can utterly destroy Mars into disperseing exhaust.

Be positioned on and 4 tons of load-carryings of CA-10B h type engine h liberation car is housed uses this silencing apparatus and Chinese patent 85102140 energy-saving muffler technical performance comparison sheets: (full load)

The silencing apparatus title

Safety (fire prevention)

Loss of horsepower (%)

Noise (indoor survey decibel)

Structure and technology

CO （％）

HC （PPM）

Install

The I. C. engine exhaust energy-saving muffler

Can not solve

≈ 2% (when just adorning)

90

Complicated

6.8

2300

Need not change original structure

Energy-saving safety silencer for exhaust of internal-combustion engine

Thoroughly solve

≈ 1% (all the time)

86

Simply

4.5

1300

The same

Silencing apparatus of the present invention can be widely used in automobile, tractor, motor tricycle, motorcycle, internal combustion locomotive, internal-combustion engine boats and ships etc.

Accompanying drawing:

Fig. 1 plan view; Fig. 2 sectional view.

1 barrel of 2 end socket 3 suction tude 4 cappings 5 outlet pipes 6 fire protection pipe

Embodiment: is an embodiment with reference to accompanying drawing to join CA-10B4 ton load-carrying lorry silencing apparatus.

The φ 210mm of silencing apparatus bucket 1, long 500mm; The φ 67mm of outlet pipe 5, long 670mm, outside staving this part of 130mm, even cloth 300 in the hole of φ 4, the φ 90mm of fire protection pipe 6, long 330mm.More than each part all be fixed on the same axis, at staving 1 and capping 4 these ends, be provided with suction tude 3, φ 64mm with the direction of the axial end tangentially of staving 1.More than each part all use 0.75A ₃Steel plate is made.Use silencing apparatus of the present invention, full load need not add Flue isolation in addition just can guarantee that other silencing apparatus of safety, car load noise ratio reduces 3-5 decibel, power loss ≈ 1%, CO(carbon monoxide), the HC(carbon compound) discharging is than general low about 30%.Above-mentioned all indexs all are better than or are better than greatly the index of No. 85102140 energy-saving mufflers of China's patent of invention, and simple in structure, and long-term use can not influence using effect because of carbon deposit.

Claims (7)

1, a kind of energy-saving safety silencer that is used for I. C. engine exhaust, its major technique are characterised in that it is by bucket 1; The end socket 2 that links to each other with bucket 1, suction tude 3, capping 4; Form with outlet pipe 5, fire protection pipe 6 that capping 4 is fixed together.

2,, it is characterized in that the φ 60～600mm of bucket 1, and equal 0.2-0.5 times of its length according to the described silencing apparatus of claim 1..

3, according to the described silencing apparatus of claim 1., the direction of its tangent line of bucket 1 upper edge of an end that links to each other with capping 4 at bucket 1 is provided with a suction tude 3, and its internal diameter equals the external diameter of its institute's adapted engine exhaust pipe, and length is not limit.

4, according to the described silencing apparatus of claim 1., its major technique is characterised in that the central authorities in bucket 1 and capping 4 are provided with an outlet pipe 5, its length is greater than the length of bucket 1, and its diameter equals 0.1-0.5 times of bucket 1 diameter, and the part outside bucket 1 is provided with several exhaust ports.

5, according to the described silencing apparatus of claim 1., its major technique is characterised in that the periphery of outlet pipe 5 is provided with fire protection pipe 6, and its diameter is 1.1-1.5 a times of outlet pipe 5 diameters, and its length is 0.5-5 times of outlet pipe 5 length.

6,, best point-blank when the axis of bucket 1, end socket 2, capping 4, outlet pipe 5, fire protection pipe 6 is installed according to the described silencing apparatus of claim 1.2.3.4.5..

7, according to the described silencing apparatus of claim 1.2.3.4.5., it is characterized in that each part is metal and other heat-resistant material is formed, available weldering between the part, buckle, riveting, sticking way combine.