CN207500020U - A kind of novel noise reduction manifold - Google Patents

Abstract

The utility model is related to a kind of novel noise reduction manifolds, the novel noise reduction manifold includes air inlet pipe and connection manifold, the air inlet on the air inlet pipe top is connect through air inlet pipe flange with hose, the buffering noise reducing pipe bottom of the bottom end setting closing of the air inlet pipe, it is communicated in the middle part of the tail end and air inlet pipe of the connection manifold, the gas outlet of the connection manifold front end is connected through manifold flange with booster inlet end；Connection manifold is placed in the middle part of air inlet pipe, during so that the gas introduced entering booster through air inlet pipe, arrive first at buffering noise reducing pipe bottom, buffered noise reducing pipe bottom is turned back into booster, the air-flow reduced in air inlet pipe is prewhirled, and can effectively reduce the pressure oscillation of air inlet, weakens the surge trend of booster, the stability of booster interior air-flow is improved, effectively reduces Hiss noises.

Description

A kind of novel noise reduction manifold

Technical field

The utility model is related to turbocharger apparatus technical field, particularly a kind of novel noise reduction manifold.

Background technology

Turbocharger is using the high-temp waste gas of engine discharge, drives the turbine rotation acting in turbine, turbine Axis drives the impeller high speed rotation in coaxial connected compressor, and compressed air, is supplied to engine high pressure, height in eccentric fashion Density air.So as to which we can spray more fuel oils to engine, reach and improve engine power, torque and reduction discharge etc. Purpose.

Increasingly strict with emission regulation, particularly the proposition of carbon emission limitation, supercharging technology become engine technology The inevitable choice of development.And the noise problem occurred in booster is just particularly important, although the utility model of booster is Through the history of more than 90 years, but the also prematurity of the research about booster noise problem.Noise common in booster is asked at present Topic includes：Surge noise, synchronous vibration noise, multistage synchronous noise, Hiss noises.Hiss noises therein are extremely difficult to locate Reason, the generation of this noise are primarily due to compressor line and excessively close on surge region, and pressure booster blower impeller is made to increase when working Press air that upheaval occurs disorderly.

Paper in APC Annual Conference collections of thesis in 2010 is published according to Qi Junshuai et al.《Turbocharger Hiss makes an uproar Acoustic control experimental study》Described in, turbulent flow of the excitation of Hiss noises from turbocharger air compressor interior air-flow, with compressor The more marginal surge area of surge line is related；Line is run under the conditions of full engine load too close to surge line, and enters limit asthma Shake region when, easily generate Hiss noises.This noise mainly from indirec radiations such as compressor housings, admission line, charge air coolers, from Bleed ports directly radiate.Based on the mechanism of production of Hiss noises, reducing the approach of this noise mainly has two aspects：First, from source Noise is controlled, compressor operation line is made to effectively reduce turbulence driver, but this method is often far from surge line or marginal surge area It is very difficult, because meeting the so perfect compressor model of low speed torque it is difficult to find both to meet high-speed power and have, drops Low torque is that engine is designed and developed and is unwilling to see again；Second is that it is controlled from transmission path：Radiation including reduction pipeline, Strengthen sealing of vehicle etc.；The cost for strengthening vehicle sealing is higher, and is related to the manufacture of vehicle, complex process, it is difficult to realize. Ideal mode is that admission line is improved；The existing L-shaped setting of admission line, for suspension type long-armed type, one end Through flange and booster press bond, the other end is directly socketed in hose, is carried out for admission line practicality ANSYS softwares Simulation analysis, FEM modal analysis and modal show that the model frequency range of the former ranks of admission line of the structure is 600-3800Hz, And booster Hiss noises frequency range is the most apparent in 1500-2500Hz noises, therefore is in the former rank intrinsic frequencies of admission line In the range of, it is apparent to Hiss influence of noises.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of novel noise reduction manifolds simple in structure.

In order to solve the above technical problems, novel noise reduction manifold provided by the utility model, including：Air inlet pipe and connection discrimination Pipe, the air inlet on the air inlet pipe top are connect through air inlet pipe flange with hose, the buffering drop of the bottom end setting closing of the air inlet pipe It makes an uproar tube bottom, is communicated in the middle part of the tail end and air inlet pipe of the connection manifold, the gas outlet of the connection manifold front end is through manifold flange It is connected with booster inlet end.

Further, the hemispherical setting in buffering noise reducing pipe bottom of the air inlet pipe, the setting at hemispherical buffering noise reducing pipe bottom, The air-flow that gas in air inlet pipe can be weakened is prewhirled.

Further, the connection manifold is set perpendicular to the air inlet pipe so that the gas in air inlet pipe enters booster Preceding elder generation turns again to 90 ° after being turned to by buffering noise reducing pipe bottom and is allowed for access, and is easily assembled simultaneously.

Further, the rounded setting in section of connection the manifold gas outlet, air inlet pipe air inlet, the connection manifold Diameter is equal with the diameter of the air inlet pipe.

Further, 2.5 times of its of length no more than diameter of the air inlet pipe reduce the pipe range of air inlet pipe.

Further, the connection manifold, the setting of air inlet pipe integrally casting shaping, it is simple in structure, it is easily fabricated.

The technique effect of utility model：The novel noise reduction manifold of the utility model, relative to L-type air inlet of the prior art Pipeline, connection manifold are placed in the middle part of air inlet pipe so that when the gas of introducing enters booster through air inlet pipe, arrive first at buffering Noise reducing pipe bottom, buffered noise reducing pipe bottom are turned back into booster, and the air-flow reduced in air inlet pipe is prewhirled, can be effective Reduce the pressure oscillation of air inlet, weaken the surge trend of booster, improve the stability of booster interior air-flow, effectively reduce Hiss Noise；And the surge of booster is when being transmitted outward by connection manifold, when being transferred to air inlet pipe, by two lateral air inlet pipe of connection manifold Both ends transmitted, avoid one-way transmission；The length of air inlet pipe and the ratio of its diameter are defined, reduce air inlet The draw ratio of pipe carries out simulation analysis using ANSYS softwares, and model frequency range is in Hiss noises in more than 4200Hz Except frequency range, it can be very good to avoid resonating；Air inlet and gas outlet are disposed as circle so that turbocharger inlet air-flow More uniformly, Hiss noises are reduced well；Air inlet pipe is assembled with connecting manifold using flange, reduces air-flow pair The impact of bend pipe.

Description of the drawings

The utility model is described in further detail with reference to the accompanying drawings of the specification：

Fig. 1 is the dimensional structure diagram of the novel noise reduction manifold of the utility model；

Fig. 2 is the front view of the novel noise reduction manifold of the utility model；

Fig. 3 is the sectional view of the novel noise reduction manifold of the utility model.

In figure：Air inlet pipe 1, air inlet 11, air inlet pipe flange 12, noise reduction separator tube bottom 13 connect manifold 2, manifold outlet Mouth 21, manifold flange 22.

Specific embodiment

Embodiment 1 as shown in Figure 1 to Figure 3, the novel noise reduction manifold of the present embodiment, the air inlet including integrally casting shaping Pipe 1 and connection manifold 2, the air inlet 11 on 1 top of air inlet pipe are connect through air inlet pipe flange 12 with hose, the bottom of the air inlet pipe 1 The buffering noise reducing pipe bottom 13 of end setting closing, the 13 hemispherical setting of buffering noise reducing pipe bottom connect tail end and the air inlet of manifold 2 The middle part of pipe 1 communicates, and connects manifold 2 and set perpendicular to air inlet pipe 1 so that the gas in air inlet pipe 1 enters before booster first 90 ° are turned again to after being turned to by buffering noise reducing pipe bottom 13 to be allowed for access, the gas outlet 21 of 2 front end of connection manifold is through manifold method Orchid 22 is connected with booster inlet end.

Preferably, connection manifold gas outlet 21, the rounded setting in section of air inlet pipe air inlet 11, connection manifold 2 Diameter is equal with the diameter of air inlet pipe 1；The length of air inlet pipe 2 is 2.5 times of its diameter.

Obviously, above-described embodiment is only intended to clearly illustrate the utility model example, and is not to this reality With the restriction of novel embodiment.For those of ordinary skill in the art, may be used also on the basis of the above description To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And these Belong to the spiritual changes and variations that derived from of the utility model still in the scope of protection of the utility model Among.

Claims (6)

1. a kind of novel noise reduction manifold, which is characterized in that including：Air inlet pipe and connection manifold, the air inlet on the air inlet pipe top It is connect through air inlet pipe flange with hose, the buffering noise reducing pipe bottom of the bottom end setting closing of the air inlet pipe, the tail of the connection manifold With being communicated in the middle part of air inlet pipe, the gas outlet of the connection manifold front end is connected through manifold flange with booster inlet end at end.

2. novel noise reduction manifold according to claim 1, which is characterized in that the buffering noise reducing pipe bottom of the air inlet pipe is in half Spherical shape setting.

3. novel noise reduction manifold according to claim 1 or 2, which is characterized in that it is described connection manifold perpendicular to it is described into Tracheae is set.

4. novel noise reduction manifold according to claim 3, which is characterized in that the connection manifold gas outlet, air inlet pipe into The rounded setting in section of gas port, the diameter of the connection manifold are equal with the diameter of the air inlet pipe.

5. novel noise reduction manifold according to claim 4, which is characterized in that its of length no more than diameter of the air inlet pipe 2.5 times.

6. novel noise reduction manifold according to claim 5, which is characterized in that the connection manifold, air inlet pipe integrally casting Molding setting.