CN104675565B

CN104675565B - Mixer

Info

Publication number: CN104675565B
Application number: CN201510088109.XA
Authority: CN
Inventors: 陈友荣
Original assignee: CHENGDU NAIERTE TECHNOLOGY Co Ltd
Current assignee: CHENGDU NAIERTE TECHNOLOGY Co Ltd
Priority date: 2014-10-23
Filing date: 2015-02-26
Publication date: 2017-01-11
Anticipated expiration: 2035-02-26
Also published as: CN204511712U; CN104653354B; CN104653354A; CN104675565A; CN104405539A

Abstract

The invention discloses a mixer which comprises a mixer body and a diversion body arranged between an air inlet and a mixed gas outlet of the mixer body, wherein the diversion body comprises a diversion ring and a diversion column arranged in the diversion ring; a plurality of natural gas injecting holes for injecting natural gas in the mixer body are respectively formed in the diversion ring and the diversion column. According to the mixer disclosed by the invention, the mixing uniformity is about 95 percent and is greatly improved; the air inlet uniformity of an engine is improved; the power of the engine is improved, and various faults caused by non-uniform mixing of air and gas are reduced; under the same output power, the consumption of the natural gas is reduced, and energy sources are saved. The mixer is more economic and practical.

Description

A kind of blender

Technical field

The invention belongs to gas engine mixed gas field, be specifically related to a kind of blender.

Background technology

Blender in gas engine, is that natural gas and air are thoroughly mixed to form combustion mixture supply engine.Mixing Device should be able to by air and natural gas fully, mix uniformly.

As shown in Fig. 9～Figure 11, Patent No. " ZL201220347243.9 ", patent name are the special of " blender assembly " Profit, disclosed blender includes mixing body, the blender fuse being located in mixing body and four tear type arms, and air enters The when of entering blender, according to kinematic principle, air produces a kind of disturbance by tear type arm appearance, can make from core Inside sub-aperture, combustion gas out can mixing evenly.

If air is mixed thoroughly with combustion gas, mixing homogeneity should be 1, by analytical calculation, the mixing of above-mentioned patent Device mixing homogeneity is about 76%, and distance is mixed thoroughly the biggest gap, and air is uneven easily with combustion gas mixing The fault such as cause gas engine unstable idle speed, carbon deposit, burning insufficient, weak, it is existing that to be badly in need of a kind of mixing homogeneity higher, The more preferable blender of mixed effect.

Summary of the invention

Present invention aim to address the problems referred to above, it is provided that one can make natural gas and the higher blender of air mixing homogeneity.

For solving above-mentioned technical problem, the technical scheme is that a kind of blender, including mixing body and being arranged on mixed Baffle between clutch body air inlet and gaseous mixture gas outlet, described baffle includes guide ring and is arranged in guide ring Diversion column, guide ring and diversion column are equipped with by gas spraying to mixing body in some natural gas spray orifices.

Preferably, being provided with turbulent at described mixing body gaseous mixture gas outlet, turbulent includes flow-disturbing ring and is inclined at Spoiler between wall in flow-disturbing ring and blender body.

Preferably, the space between flow-disturbing ring and mixing body is divided into uniform six parts by described spoiler.

Preferably, being provided with retraction ring at described mixing body air inlet, the internal diameter of retraction ring becomes larger along air flow.

Preferably, described guide ring and diversion column are hollow, diversion column and guide ring and all communicate with each other.

Preferably, described diversion column intersects at the home position of guide ring and guide ring is divided into uniform three parts.

Preferably, the side of described mixing body is provided with natural gas air inlet, and guide ring communicates with natural gas air inlet.

Preferably, the cross section of described guide ring and diversion column is along air flow water-drop-shaped from large to small.

Preferably, described natural gas spray orifice is uniformly arranged on the both sides of guide ring and diversion column, and all natural gas spray orifices are positioned at Same level.

Preferably, the tangent line of described natural gas spray orifice present position point is parallel with air flow.

The invention has the beneficial effects as follows: blender provided by the present invention, in guide ring, diversion column and blender body, wall is formed Multiple structures being similar to Venturi tube, the natural gas when of making air flow through baffle sprayed natural gas spray orifice produces Certain suction, increases the kinetic energy of natural gas, makes natural gas and air mixing more uniform, mixes body gaseous mixture gas outlet The turbulent that place is arranged promotes mixing homogeneity further, and finally the mixing homogeneity of this blender natural gas and air is about 95%, greatly improve mixing homogeneity, improve engine charge uniformity, improve the power of electromotor, decrease Because of the various faults of air Yu the uneven generation of combustion gas mixing, under same output, reduce the consumption of natural gas, Having saved the energy, this blender is the most economic and practical.

Accompanying drawing explanation

Fig. 1 is the structural representation of blender of the present invention；

Fig. 2 is the top view of blender of the present invention；

Fig. 3 is the sectional view of the A-A of Fig. 2；

Fig. 4 is the sectional view of the B-B of Fig. 2；

Fig. 5 is the structural representation that the present invention goes out gas；

Fig. 6 is the structural representation of retraction ring of the present invention；

Fig. 7 is the structural representation of turbulent of the present invention；

Fig. 8 is the top view of turbulent of the present invention；

Fig. 9 is the structural representation of the blender of Patent No. " ZL201220347243.9 "；

Figure 10 is the top view of the blender of Patent No. " ZL201220347243.9 "；

Figure 11 is the sectional view of the A-A of Figure 10.

Description of reference numerals: 1, guide ring；2, diversion column；3, natural gas air inlet；4, retraction ring；5, air inlet body；6、 Go out gas；7, flow-disturbing ring；8, spoiler；9, turbulent outer shroud；10, pin.

Detailed description of the invention

The present invention is described further with specific embodiment below in conjunction with the accompanying drawings:

As shown in Fig. 1～Fig. 8, the blender of the present invention, including mixing body, baffle and turbulent, mixing body is tool Air inlet and the hollow structure of gaseous mixture gas outlet, baffle and turbulent is had to be installed in portion in blender body, water conservancy diversion Body is positioned between air inlet and gaseous mixture gas outlet, is used for spraying natural gas, and to the air entered from air inlet It play the guiding role；Turbulent is positioned at mixing body gaseous mixture gas outlet, is positioned at the lower section of baffle along air flow, uses In upsetting mixed gas further, promote the mixing homogeneity of air and combustion gas.

Baffle includes guide ring 1 and the diversion column 2 being arranged in guide ring 1, and diversion column 2 intersects at the center of circle of guide ring 1 Guide ring 1 is also divided into uniform three parts by position, guide ring 1 and diversion column 2 is equipped with by gas spraying to mixed Some natural gas spray orifices in clutch body, guide ring 1 and diversion column 2 are hollow and communicate with each other.

The side of mixing body is provided with natural gas air inlet 3, and natural gas air inlet 3 communicates with guide ring 1, by natural gas air inlet The natural gass that mouth 3 enters initially enter guide ring 1, and portion of natural gas enters blender by the natural gas spray orifice on guide ring 1 Body, remaining natural gas enters diversion column 2 by guide ring 1 again, and finally the natural gas spray orifice from diversion column 2 enters mixing Body.

The cross section of guide ring 1 and diversion column 2 is along air flow water-drop-shaped from large to small, guide ring 1 and diversion column 2 And wall forms multiple structures being similar to Venturi tube in guide ring 1 and blender body, when air flows through guide ring 1 and leads During the baffle of fluidization tower 2 composition, air is squeezed, and flow velocity speeds, and faster flow velocity is more conducive to the mixed of natural gas and air Close.

Natural gas spray orifice is uniformly arranged on guide ring 1 and the both sides of diversion column 2, the tangent line of natural gas spray orifice present position point with Air flow is parallel, i.e. natural gas spray orifice is located at guide ring 1 and the widest place of diversion column 2 cross section, and all natural gass Spray orifice is positioned at same level, and due to the effect of Venturi effect, natural gas spray orifice location air velocity increases, This position produces low pressure simultaneously, the natural gas in natural gas spray orifice is produced adsorption, adds the kinetic energy of natural gas, make The mixing of air and natural gas is more uniform.

Turbulent include flow-disturbing ring 7 and be inclined at flow-disturbing ring 7 and blender body in spoiler 8 between wall, spoiler 8 One end be connected with the outer wall of flow-disturbing ring 7, the other end is connected with wall in blender body, and the quantity of spoiler 8 is six, six Annular space between flow-disturbing ring 7 and mixing body is divided into uniform six parts by spoiler 8, and mixed gas flows through disturbs Stream ring 7 and spoiler 8 are upset mixing further.

Being provided with retraction ring 4 at mixing body air inlet, the internal diameter of retraction ring 4 becomes larger along air flow, mixes body The air that air inlet enters enters mixing body along retraction ring 4；Retraction ring 4 can regard one section of shorter reducer pipe as, Blender can mate with different size of inlet pipeline easily by changing different size of retraction ring 4.

In actual production, processing for convenience, each parts splicing that blender is prepared by casting process forms, and mainly wraps Including air inlet body 5 and go out gas 6, air inlet body 5 includes guide ring 1 and the diversion column 2 of part, goes out gas 6 and includes part Guide ring 1 and diversion column 2, when air inlet body 5 with go out gas 6 be connected time, in gas 5 part guide ring 1 and diversion column 2 form complete guide ring 1 and diversion column 2 with the guide ring 1 and diversion column 2 going out part in gas 6, and retraction ring 4 is installed At the air inlet of air inlet body 5.

Air inlet body 5 is connected by four screws with going out gas 6, positions for convenience during connecting, air inlet body 5 with Go out one end that gas 6 is connected and be provided with two pin-and-holes, go out gas 6 and also be provided with two pin-and-holes at corresponding site, two pins 10 points It is not arranged in pin-and-hole air inlet body 5 and goes out gas 6 and position.

Turbulent is formed in one, including flow-disturbing ring 7, spoiler 8 and turbulent outer shroud 9, flow-disturbing ring 7 and turbulent outer shroud 9 are positioned at turbulent outer shroud 9 for donut and flow-disturbing ring 7, and one end of spoiler 8 is connected with flow-disturbing ring 7 outer wall, another End is connected with turbulent outer shroud 9 inwall, and turbulent outer shroud 9 outer wall and the inwall going out gas 6 are fitted；Partial air is along mixed Almost seldom mix, if allowing this portion gas be given vent to anger by gaseous mixture with natural gas during wall flowing in clutch body Mouth then can reduce mixing homogeneity if getting rid of, and the internal diameter on turbulent outer shroud 9 top gradually contracts along the gas flow of mixed gas Little, in blender body wall flowing this portion of gas flows to turbulent outer shroud 9 time be obstructed, can under the effect on inclined-plane Make the gas being obstructed produce backflow and carry out secondary mixing, promote mixing homogeneity further.Discounting for the reason of processing, Turbulent outer shroud 9 can regard a part for wall in blender body as, and spoiler 8 is directly connected with wall in blender body.

Air inlet body 5 is provided with one end of pin-and-hole and is additionally provided with annular groove, this groove is provided with sealing ring for ensure air inlet body 5 with Go out the air-tightness that gas 6 connects；In order to ensure to mix the air-tightness that body is connected with external device (ED), at air inlet with mixed Closing and be also respectively equipped with sealing ring near gas gas outlet, the sealing ring near air inlet is located at retraction ring 4 and air inlet body 5 institute In the annular groove formed, the sealing ring near gaseous mixture gas outlet is located at turbulent and 6 annular grooves formed that go out gas In.

The mixing uniformity of the blender of the present invention is analyzed computing, assessment natural gas and air mixing in a mixer Situation, analytical calculation uses the three-dimensional graphics software such as SolidWorks, UG to generate threedimensional model, by be converted into * .igs or *, during the file of .step form imports ANSYS, use Workbench to mark off the basin of air and natural gas, use ICEM CFD generates grid, and final utilization FLUENT calculates, and the turbulence model that computation model uses is k-ε two equation turbulent flow mould Type, uses wall-function method near wall.

Calculating and use stable state to calculate, air intake, fuel gas inlet all give constant mass flow border, and outlet is set to constant Pressure boundary, wherein air composition is set as being made up of 75% nitrogen and 25% oxygen, and natural gas composition is set as by the first of 100% Alkane forms.

The combustion gas volume content distribution consistency degree of this analytical calculation employing Area-weighted is as evaluation criterion, if air and combustion Gas is mixed thoroughly, and this value should be 1, and i.e. uniformity b is closer to 1, illustrates that natural gas and air mix the most uniform:

b = 1 - 0.5 \times \frac{Σ [(\frac{a_{i}}{a} - 1) \times s_{i}]}{{Σs}_{i}},

Wherein, a is combustion gas volume content meansigma methods:

a = \frac{Σ (a_{i} \times s_{i})}{{Σs}_{i}},

a_iFor each point combustion gas volume content；

s_iFor each point in measuring surface.

Different boundary conditions (i.e. the external characteristics data of the electromotor of different displacements) is used to be analyzed calculating, mixing of gained Close uniformity b as shown in table 1:

Table 1

As seen from the above table, the blender natural gas of the present invention and the mixing homogeneity of air are relevant from different boundary conditions, but At least 0.9409, mixing homogeneity best the most closely 1, relative to former blender mixing homogeneity (about 0.766) There is significant increase, and the mixing homogeneity of blender of the present invention has the most also reached top level.

Those of ordinary skill in the art is it will be appreciated that embodiment described here is to aid in the reader understanding present invention's Principle, it should be understood that protection scope of the present invention is not limited to such special statement and embodiment.This area common It is various specifically that technical staff can make various other without departing from essence of the present invention according to these technology disclosed by the invention enlightenment Deformation and combination, these deformation and combination are the most within the scope of the present invention.

Claims

1. a blender, including mixing body and the water conservancy diversion being arranged between mixing body air inlet and gaseous mixture gas outlet Body, it is characterised in that: described baffle includes guide ring (1) and the diversion column (2) being arranged in guide ring (1), water conservancy diversion It is equipped with the some natural gas spray orifices in gas spraying to mixing body on ring (1) and diversion column (2)；

Being provided with turbulent at described mixing body gaseous mixture gas outlet, turbulent includes flow-disturbing ring (7) and is inclined at flow-disturbing Spoiler (8) between wall in ring (7) and blender body.

Blender the most according to claim 1, it is characterised in that: described spoiler (8) is by flow-disturbing ring (7) and mixes Space between clutch body is divided into uniform six parts.

Blender the most according to claim 1 and 2, it is characterised in that: it is provided with at described mixing body air inlet Retraction ring (4), the internal diameter of retraction ring (4) becomes larger along air flow.

Blender the most according to claim 1 and 2, it is characterised in that: described guide ring (1) and diversion column (2) It is hollow, diversion column (2) and guide ring (1) all to communicate with each other.

Blender the most according to claim 1 and 2, it is characterised in that: described diversion column (2) intersects at guide ring (1) guide ring (1) is also divided into uniform three parts by home position.

Blender the most according to claim 1 and 2, it is characterised in that: the side of described mixing body is provided with natural gas Air inlet (3), guide ring (1) communicates with natural gas air inlet (3).

Blender the most according to claim 1 and 2, it is characterised in that: described guide ring (1) and diversion column (2) Cross section be along air flow water-drop-shaped from large to small.

Blender the most according to claim 1 and 2, it is characterised in that: described natural gas spray orifice is uniformly arranged on water conservancy diversion Ring (1) and the both sides of diversion column (2), and all natural gas spray orifices are positioned at same level.

Blender the most according to claim 1 and 2, it is characterised in that: cutting of described natural gas spray orifice present position point Line is parallel with air flow.