CN103089372A

CN103089372A - Heat exchange silencer

Info

Publication number: CN103089372A
Application number: CN2012100328017A
Authority: CN
Inventors: 刘福贵
Original assignee: 刘莞欣
Current assignee: Beijing Hao Rui Tianyu Technology Co. Ltd.
Priority date: 2011-10-29
Filing date: 2012-02-07
Publication date: 2013-05-08
Anticipated expiration: 2032-02-07
Also published as: CN103089372B; CN202970868U

Abstract

The invention relates to a heat exchange silencer. Advanced silencing principles such as micropore jet partition, counter-phase and split-gas rushing and a thermoacoustic effect, a composite silencing theory and a strengthened heat transfer technology are adopted, 8 layers of round tubes with different lengths and diameters are sleeved on one axis to form a centrifugal S-shaped heat release silencing channel in which diesel exhaust flows from the center to the outside, and a centripetal S-shaped heat absorption channel in which a heat absorption medium flows from an outer layer to an inner layer through guide pipes and baffles, a structure flow channel for gradually reducing the temperature of noise air flow by mixing air flow at different temperatures and with counter-phase noise wave for multiple times is highlighted, and excess heat, excess pressure energy and noise energy are recovered from internal combustion engine exhaust through cold and hot working medium inlets and outlets formed at the two ends.

Description

Heat exchange silencer

Technical field:

The present invention a kind ofly has hot-swap feature and acoustic attenuation performance is combined, the heat exchange silencer that carries out simultaneously heat exchange and noise elimination, and it relates to thermal engineering, fluid mechanics and acoustics.

Background technique:

The diesel engine of one of internal-combustion engine kind, because having startability and the mobility that the thermal efficiency is high, power range is large, good and installing the advantage such as simple, cheap, technology maturation, be widely used in various naval vessels ship, internal combustion locomotive, highway business always and take advantage of transportation, dynamic power, geology oil exploration drilling, agricultural machinery power, engineering machinery and military various vehicle mountings etc.China's diesel engine changes effective heat equivalent of work into and accounts for 30%～45% of fuel combustion heating value, and all the other energy of 55%～70% 90% have lost by cooling water heat radiation and the high-temperature tail gas heat extraction of diesel engine.Cooling water heat is better because of quality, in vehicle heating and the existing extensively utilization of some boats and ships, but account for the high-temperature tail gas waste heat of most of thermal loss, because it is that periodicity flow-disturbing pulsation high temperature, height are made an uproar, mixed at high speed gas, install separately heat exchanger additional and will affect the service behaviour of diesel engine on the one hand, also to satisfy simultaneously the requirements such as anti-vibration, impact, corrosion and Security and space layout, so be difficult to reclaim, can only be disposed in atmosphere.Meanwhile, the various package units of internal-combustion engine are housed, except the air horsepower of internal-combustion engine output, also need other to consume energy with energy and daily combination system, as freezing in air-conditioning, desalination of sea water, ice making, heavy oil preheating heats, fishes for that fishing net drags and power supply etc., the particularly ship of war and equipment vehicle (mobile missile truck etc.), for improving its disguise and fighting capacity, also need to reduce the radiated noise of diesel exhaust gas temperature and the tail pipe mouth of pipe, to prevent sonar and the investigation instrument captured target such as infrared.Above explanation, need on the one hand I. C. engine exhaust cooling noise reduction and package unit auxiliary with can needs, a large amount of high-temperature exhaust airs waste and cause environmental thermal pollution on the other hand, because it is one of key measures that reduces energy consumption that diesel residual heat is recycled, how with the diesel exhaust gas heat recovery, be used for device auxiliary system energy, improve efficiency of energy utilization, reduce the hot driving pollution, do not affect simultaneously the performance characteristic of former diesel engine, satisfy again the disguised needs of naval vessels, its key is to solve heat exchange noise elimination integrated technique problem.

Summary of the invention:

Technical problem to be solved by this invention is: be recovered as purpose with exhaust heat of internal combustion engine, overbottom pressure energy, adopt micropore jet, anti-phasely liquidate, advanced noise-cancelling theory and the composite sound damping principle such as thermoacoustic effect, and in conjunction with the forced heat exchanging technology, provide a kind of outstanding with different temperatures, the anti-phase repeatedly blending of air-flow of noise waves, progressively reduce the structure runner of noise gas flow temperature, and have that anti-seismic performance is strong, flow resistance is little, the coefficient of heat transfer is high, sound deadening capacity is large, realize simultaneously the heat exchange silencer of the hot conversion performance of hot-swap feature harmony.

technical solution of the present invention is: heat exchange silencer, and it is that two ends are the cylindrical of truncated cones, the housing of outer band insulation and housing two ends are respectively equipped with the hot working fluid import, hot working fluid outlet and cold working medium import, the device that cold sender property outlet consists of is established concentric tube suit that 7 length and diameter do not wait in housing and by conduit and closure plate formation cold working medium heat recipient passage and hot working fluid heat release silencing channel separately, it outwards is followed successively by cold working medium delivery line by the center, the hot working fluid entrance cavity, the hot working fluid inner chamber, cold working medium inner chamber, the hot working fluid lumen, cold working medium exocoel, in hot working fluid exocoel and cold working medium preheating cavity, housing, the upper end is provided with collection chamber and hot working fluid outlet plenum on cold working medium, the lower end is provided with cold working medium next part chamber and the grey collect cavity of collection, and cold working medium inner chamber upper end is communicated with by collecting the chamber on delivery line and cold working medium, and cold working medium exocoel lower end is communicated with cold working medium next part chamber by ingress pipe, in cold working medium, the parallel connection of exocoel passage is afterwards by collecting the chamber on cold working medium, cold working medium delivery line, cold sender property outlet and cold working medium next part chamber, cold working medium preheating cavity, cold working medium entrance connection communicates, and forms by the skin cold working medium heat recipient passage of radial inflow S shape inwards with this, the pipe external chennel of the pipe external chennel of hot working fluid entrance, hot working fluid entrance cavity, hot working fluid inner chamber, cold working medium inner chamber delivery line, hot working fluid lumen and cold working medium exocoel ingress pipe, hot working fluid exocoel, hot working fluid outlet plenum, hot working fluid outlet connection communicate, and form by the center to outer field centrifugal S shape hot working fluid heat release silencing channel with this.

Technique effect of the present invention: it is the element with energy-saving and emission-reduction function that integrates advanced noise-cancelling theory and forced heat exchanging technology, it has solved under the prerequisite higher than existing similar silencing apparatus power loss ratio technology not, sound deadening capacity (insertion loss) is more than 30dB (A), be better than existing similar silencing apparatus, and having realized that internal combustion engine exhaust noise energy, waste heat energy and overbottom pressure energy reclaim, the exhaust energy recovery rate reaches more than 60%～80%; Heat exchange silencer has the advantages such as manufacturing structure is simple, volume is not more than similar silencing apparatus, sturdy and durable, anti-seismic performance is strong, circular bearing capacity is strong, cold and hot Working fluid flow resistance is little.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of heat exchange silencer of the present invention.

Fig. 2 is heat exchange silencer A-A sectional drawing of the present invention

Fig. 3 is heat exchange silencer B-B sectional drawing of the present invention

Embodiment:

As shown in Figure 1, heat exchange silencer comprises insulation shell 1, and the two ends of housing 1 are respectively equipped with hot working fluid import 2, hot working fluid outlet 3 and cold working medium import 4, cold sender property outlet 5; Be provided with concentric tube suit that 7 length and diameter do not wait in housing 1 and consist of separately cold working medium heat recipient passage and hot working fluid heat release silencing channel by conduit and closure plate, it outwards is followed successively by cold working medium delivery line 6, hot working fluid entrance cavity 7, hot working fluid inner chamber 8, cold working medium inner chamber 9, hot working fluid lumen 10 by the center, cold working medium exocoel 11, hot working fluid exocoel 12 and cold working medium preheating cavity 13; Upper end in housing 1 is provided with on cold working medium collection chamber 14 and hot working fluid outlet plenum 15, lower end and is provided with cold working medium next part chamber 16 and collects grey collect cavity 27; The upper end of cold working medium inner chamber 9 is communicated with by collecting chamber 14 on delivery line 17 and cold working medium, the lower end of cold working medium exocoel 11 is communicated with cold working medium next part chamber 16 by ingress pipe 18, after two passages that cold working medium inner chamber 9 and delivery line 17 and cold working medium exocoel 11 and ingress pipe 18 consist of are in parallel, connect by collection chamber 14, cold working medium delivery line 6 on cold working medium, cold sender property outlet 5 and cold working medium next part chamber 16, cold working medium preheating cavity 13, cold working medium entrance 4 and communicate, form by the skin cold working medium heat recipient passage of radial inflow S shape inwards with this; The pipe external chennel of the pipe external chennel of hot working fluid entrance 2, hot working fluid entrance cavity 7, hot working fluid inner chamber 8, delivery line 17, hot working fluid lumen 10 and ingress pipe 18, hot working fluid exocoel 12, hot working fluid outlet plenum 15, hot working fluid outlet 3 connections communicate, and form by the center to outer field centrifugal S shape hot working fluid heat release silencing channel with this.

The outer neighboring concentric pipe of described hot working fluid entrance cavity 7 is that the bottom is to have the air-flow that has some small sircle holes 23 on the tube wall that some strip holes 21, top are Taper Pipe on isometrical tube wall to cut apart injection into orbit pipe 19, its lower end equal-diameter part is inserted in the top of hot working fluid inlet duct 20, have the corresponding shutoff that misplaces up and down of identical with strip hole 21 areas, that shape is identical, quantity equates strip hole 22, two holes on the top tube wall of hot working fluid inlet duct 20.

The lower end of described hot working fluid inner chamber 8 communicates with the grey collect cavity 27 of collection by draining ash-hole 28.

As shown in Figure 1, 2, be communicated with several connecting legs 24 on the top of hot working fluid lumen 10 and the top of hot working fluid exocoel 12.

As shown in Fig. 1,3, the lower end of the lower end of hot working fluid lumen 10 and hot working fluid exocoel 12 communicates with the grey collect cavity 27 of collection by several conduits 25 and conduit 26.

Be welded with helical fin 29 on the backing pipe of described hot working fluid lumen 10 and hot working fluid exocoel 12.

working procedure summary: when internal-combustion engine moves under medium and small operating mode, exhaust is entered in hot working fluid entrance cavity 7 by hot working fluid entrance 2, flue gas is on the one hand to cold working medium delivery line 6 heat releases, spray in hot working fluid inner chamber 8 by the aperture 23 on Taper Pipe 19 on the one hand, this process noise air-flow is divided, high-frequency noises is eliminated larger, and partial noise is reflected back entrance pipe 2 by Taper Pipe, simultaneously, the noise air-flow that enters in hot working fluid inner chamber 8 is sprayed onto its outer wall, just in time to the backing face heat release of cold working medium inner chamber 9, flow to afterwards the top of hot working fluid inner chamber 8, flow into again the top of hot working fluid lumen 10 by the pipe external chennel of delivery line 17, enlarge because of this cross section, place this moment, airspeed descends, less because of air displacement and delivery temperature is lower again, the small part air-flow enters the top of hot working fluid exocoel 12 by connecting leg 24, most of air-flow will be in the lumen 10 eddy flow heat release of spinning downwards, and enter the bottom of hot working fluid exocoel 12 by the pipe external chennel of ingress pipe 18, again in the hot working fluid exocoel 12 eddy flow heat release of upwards spinning, large of exhaust gas heat is lowered the temperature by channel wall, air-flow last and connecting leg 24 converges, two bursts of combined gas streams have the temperature difference and oppositely liquidate and thermoacoustic effect, mix and further expand by hot working fluid outlet plenum 15 again, make Middle and low frequency noise larger in this elimination, discharge by outlet 3 at last.This moment,

conduit

25 and 26 played the effect of resonant cavity noise elimination with the grey collect cavity 27 of collection except expansion is eliminated the noise.

Internal-combustion engine is under declared working condition, air displacement and delivery temperature all reach the rated designs value, because delivery temperature is higher, making taper injection into orbit pipe 19 produce thermal expansion moves down, overlap the

hole

21 and 22 at exhaust entrance place open-minded, after the small part exhaust enters grey collect cavity 27 expansions of collection by this hole, carry out anti-phase liquidating by managing 25 exhausts that come with the hot working fluid lumen again, by manage 26 again with liquidate after exhaust carry out the interference of anti-phase noise, two liquidate anti-phase exhaust because there being the temperature difference to produce again thermoacoustic effect simultaneously, make noise further change into heat energy.

The present invention adopts internal combustion engine noise gas cool-down method that noise air-flow viscosity is reduced, laminar boundary layer between one side attenuate heat exchanger surface and noise gas, be conducive to the heat release of noise gaseous exchange, mean velocity, noise transmission speed, variation amplitude and the frequency of air-flow are significantly reduced, the resistance friction of noise air-flow and heat exchange wall also reduces, and reduces the friction loss that produces because of the heat exchanger surface increase.

At first noise air-flow of the present invention eliminates the noise through the Taper Pipe spout, because the Taper Pipe aperture gross area more than 1.5～2 times, makes the drag effects of Taper Pipe spray process very little greater than the entrance gross area of heat exchange silencer noise air-flow.

Noise air-flow of the present invention flows so that S shape is centrifugal, at the sectional area of 180 ° of revolutions place in two places greater than two spiral heat exchange actual internal areas, outer hot chamber spiral heat exchange sectional area is again greater than middle hot chamber spiral heat exchange sectional area, make the total logical sectional area of exhaust stream greater than conventional silencing apparatus actual internal area, the more general silencing apparatus of exhaust flow rate is low, and the sound output of exhaust sound, drag losses and regenerated noise are all lower.

The internal combustion engine exhaust noise level linearly rises with the engine speed increase, and the adjustable auxiliary flow of the present invention's design is open-minded, is conducive to eliminate the noise and heat exchange, and the exhaust resistance when reducing large operating mode makes the more conventional silencing apparatus of exhaust back pressure less on the motor impact.

Domestic and abroad hot chamber installs helical fin additional flows the noise flow spiral, increase on the one hand used heat make an uproar air-flow flowing velocity, strengthen disturbance to improve the coefficient of heat transfer, simultaneously also increase heat exchange area, and strengthened the structure strength of sleeve pipe, the more applicable low temperature organic working medium of cold working medium.

Chamber 27 has that the collection ash catchments, medium and small operating mode resonant silencing, large operating mode play that expansion is eliminated the noise and the multiple effect such as accessory channel.

Diesel engine exhaust muffler provided by the invention, sound deadening capacity are more than 30dB (A), and delivery temperature is down to below 200 ℃, and the diesel exhaust gas waste heat energy recovery rate reaches more than 60%～80%.

Claims

1. heat exchange silencer, comprise insulation shell 1, and the two ends of housing 1 are respectively equipped with hot working fluid import 2, hot working fluid outlet 3 and cold working medium import 4, cold sender property outlet 5; Be provided with concentric tube suit that 7 length and diameter do not wait in housing 1 and consist of separately cold working medium heat recipient passage and hot working fluid noise elimination heat release passage by conduit and closure plate, it outwards is followed successively by cold working medium delivery line 6, hot working fluid entrance cavity 7, hot working fluid inner chamber 8, cold working medium inner chamber 9, hot working fluid lumen 10 by the center, cold working medium exocoel 11, hot working fluid exocoel 12 and cold working medium preheating cavity 13; Upper end in housing 1 is provided with on cold working medium collection chamber 14 and hot working fluid outlet plenum 15, lower end and is provided with cold working medium next part chamber 16 and collects grey collect cavity 27; The upper end of cold working medium inner chamber 9 is communicated with by collecting chamber 14 on delivery line 17 and cold working medium, the lower end of cold working medium exocoel 11 is communicated with cold working medium next part chamber 16 by ingress pipe 18, after two passages that cold working medium inner chamber 9 and delivery line 17 and cold working medium exocoel 11 and ingress pipe 18 consist of are in parallel, connect by collection chamber 14 on cold working medium, cold working medium delivery line 6, cold sender property outlet 5 and cold working medium next part chamber 16, cold working medium preheating cavity 13, cold sender property outlet 4 and communicate; The pipe external chennel of the pipe external chennel of hot working fluid entrance 2, hot working fluid entrance cavity 7, hot working fluid inner chamber 8, delivery line 17, hot working fluid lumen 10 and ingress pipe 18, hot working fluid exocoel 12, hot working fluid outlet plenum 15, hot working fluid outlet 3 connections communicate.

2. heat exchange silencer as claimed in claim 1, it is characterized in that, the outer neighboring concentric pipe of described hot working fluid entrance cavity 7 is that the bottom is to have the air-flow that has some small sircle holes 23 on the tube wall that some strip holes 21, top are Taper Pipe on isometrical tube wall to cut apart injection into orbit pipe 19, its lower end equal-diameter part is inserted in the top of hot working fluid inlet duct 20, have the corresponding shutoff that misplaces up and down of identical with strip hole 21 areas, that shape is identical, quantity equates strip hole 22, two holes on the top tube wall of hot working fluid inlet duct 20.

3. heat exchange silencer as claimed in claim 1, is characterized in that, the lower end of described hot working fluid inner chamber 8 communicates with the grey collect cavity 27 of collection by draining ash-hole 28.

4. heat exchange silencer as claimed in claim 1, is characterized in that, the top of the top of described hot working fluid lumen 10 and hot working fluid exocoel 12 is communicated with several connecting legs 24.

5. heat exchange silencer as claimed in claim 1, is characterized in that, the lower end of the lower end of described hot working fluid lumen 10 and hot working fluid exocoel 12 communicates with the grey collect cavity 27 of collection by several conduits 25 and conduit 26.

6. heat exchange silencer as claimed in claim 1, is characterized in that, is welded with helical fin 29 on the inwall pipe of described hot working fluid lumen 10 and hot working fluid exocoel 12.