CN204175459U - A kind of mixer - Google Patents

Abstract

The utility model discloses a kind of mixer, the deflector comprising mixing body and be arranged between mixing body air inlet and mixed gas air outlet, described deflector comprises guide ring and is arranged on the diversion column in guide ring, and guide ring and diversion column are equipped with gas spraying to the some rock gas spray orifices in mixing body; Mixer mixture homogeneity of the present utility model is about 95%, greatly improve mixture homogeneity, improve engine charge uniformity, improve the power of motor, decrease the various faults because of air and the uneven generation of combustion gas mixing, under same output power, reduce the consumption of rock gas, saved the energy, this mixer is more economic and practical.

Description

A kind of mixer

Technical field

The utility model belongs to gas engine mixed gas field, is specifically related to a kind of mixer.

Background technique

Mixer in gas engine is that rock gas and air are thoroughly mixed to form inflammable mixture supply engine.Air and rock gas should be able to fully, uniformly mix by mixer.

As shown in Fig. 7 ~ Fig. 9, the patent that the patent No. is " ZL201220347243.9 ", patent name is " mixer assembly ", disclosed mixer comprises mixing body, be located at mixer fuse in mixing body and four tear type arms, time air enters mixer, according to kinematic principle, air produces a kind of disturbance by tear type arm appearance, combustion gas out can be enable inside fuse aperture evenly mixing.

If air mixes completely with combustion gas, mixture homogeneity should be 1, pass through analytical calculation, the mixer mixture homogeneity of above-mentioned patent is about 76%, distance mixes gap very large in addition completely, and air and the uneven fault such as easily cause gas engine unstable idle speed, carbon deposit, burning insufficient, weak of combustion gas mixing, be now badly in need of a kind of mixture homogeneity higher, the better mixer of mixed effect.

Model utility content

The purpose of this utility model solves the problem, and provides a kind of rock gas is fully mixed with air, mixer that mixture homogeneity is higher.

For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of mixer, the deflector comprising mixing body and be arranged between mixing body air inlet and mixed gas air outlet, described deflector comprises guide ring and is arranged on the diversion column in guide ring, and guide ring and diversion column are equipped with gas spraying to the some rock gas spray orifices in mixing body.

Preferably, described guide ring and diversion column are hollow, and diversion column and guide ring 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 rock gas suction port, and guide ring communicates with rock gas suction port.

Preferably, described mixing body mixed gas air outlet is provided with contractile ring, and the inside diameter that contractile ring contacts with mixed gas reduces gradually along the gas flow of mixed gas.

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

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

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

The beneficial effects of the utility model are: mixer provided by the utility model, guide ring, diversion column and mixer inner walls form multiple structure being similar to Venturi tube, when making air flow through deflector, certain suction is produced to the rock gas that rock gas spray orifice sprays, increase the kinetic energy of rock gas, make rock gas and air mix more even; The contractile ring that mixed gas air outlet place is arranged can make the gas generation backflow of being obstructed carry out secondary mixing, promotes mixture homogeneity further; The mixture homogeneity of this mixer is about 95%, greatly improve mixture homogeneity, improve engine charge uniformity, improve the power of motor, decrease the various faults because of air and the uneven generation of combustion gas mixing, under same output power, reduce the consumption of rock gas, saved the energy, this mixer is more economic and practical.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model mixer;

Fig. 2 is the plan view of the utility model mixer;

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 utility model goes out gas and pin;

Fig. 6 is the structural representation of the utility model contractile ring;

The structural representation of Fig. 7 to be the patent No. be mixer of " ZL201220347243.9 ";

The plan view of Fig. 8 to be the patent No. be mixer of " ZL201220347243.9 ";

Fig. 9 is the sectional view of the A-A of Fig. 8;

Figure 10 is the mixer outlet place mixing situation distribution map of scheme one;

Figure 11 is scheme two mixer outlet place mixing situation distribution map.

Description of reference numerals: 1, guide ring; 2, diversion column; 3, rock gas suction port; 4, contractile ring; 5, air inlet body; 6, gas is gone out; 7, seal ring; 8, pin.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described further:

As shown in Fig. 1 ~ Fig. 6, mixer of the present utility model, comprise mixing body and deflector, mixing body is the hollow structure with air inlet and mixed gas air outlet, be provided with the deflector that can eject rock gas between air inlet and mixed gas air outlet, deflector play the guiding role to the air entered from air inlet simultaneously.

The diversion column 2 that deflector comprises guide ring 1 and is arranged in guide ring 1, diversion column 2 intersects at the home position of guide ring 1 and guide ring 1 is divided into uniform three parts, guide ring 1 and diversion column 2 are equipped with by gas spraying to the some rock gas spray orifices in mixing body, and guide ring 1 and diversion column 2 are hollow and communicate with each other.

The side of mixing body is provided with rock gas suction port 3, rock gas suction port 3 communicates with guide ring 1, first the rock gas entered by rock gas suction port 3 enters guide ring 1, portion of natural gas enters mixing body by the rock gas spray orifice on guide ring 1, remaining rock gas enters diversion column 2 by guide ring 1 again, finally enters mixing body from the rock gas spray orifice diversion column 2.

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 guide ring 1 and the multiple structure being similar to Venturi tube of mixing body inwall composition, when air flows through the deflector of guide ring 1 and diversion column 2 composition, air receives extruding, flow velocity speeds, and flow velocity is more conducive to the mixing of rock gas and air faster.

Rock gas spray orifice is evenly arranged on the both sides of guide ring 1 and diversion column 2, the tangent line of rock gas spray orifice present position point is parallel with air flow, namely rock gas spray orifice is located at guide ring 1 and the widest place of diversion column 2 cross section, and all rock gas spray orifices are positioned at same level, due to the effect of Venturi effect, position air velocity residing for rock gas spray orifice increases, produce low pressure in this position simultaneously, suction-operated is produced to the rock gas in rock gas spray orifice, add the kinetic energy of rock gas, make the mixing of air and rock gas more even.

In the process that partial air flows along mixer inner walls almost seldom and rock gas mix, if allow this part gas be got rid of by mixed gas air outlet, mixture homogeneity can be reduced, therefore contractile ring 4 is provided with in mixed gas air outlet, the inside diameter that contractile ring 4 contacts with mixed gas reduces gradually along the gas flow of mixed gas, be obstructed when this part gas prolongs when mixer inner walls flow to contractile ring 4, the air be obstructed can be made under the effect of contractile ring 4 to produce reflux and carry out secondary mixing, promote mixture homogeneity further.

In the production of reality, conveniently process, mixing body comprises air inlet body 5 and goes out gas 6, guide ring 1 and the diversion column 2 of part is provided with in air inlet body 5, go out in gas 6 guide ring 1 and diversion column 2 that are provided with part, when air inlet body 5 with go out gas 6 be connected time, in gas 5, the guide ring 1 of part 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 contractile ring 4 is arranged on out on the mixed gas air outlet of gas 6.

Air inlet body 5 with go out gas 6 and be connected by four screws, conveniently locate in the process connected, 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 be also provided with two pin-and-holes at corresponding site, two pins 8 to be arranged in pin-and-hole air inlet body 5 respectively and to go out gas 6 and position.

One end that air inlet body 5 is provided with pin-and-hole is also provided with annular groove, and seal ring 7 is located in this groove and is ensured air inlet body 5 and the tightness going out gas 6 and be connected.

In order to ensure the tightness that mixing body is connected with external means, also seal ring 7 is respectively equipped with near air inlet and mixed gas air outlet, seal ring 7 near air inlet is located in the annular groove on air inlet body 5, during the seal ring 7 near mixed gas air outlet is located at contractile ring 4 and is gone out annular groove that gas 6 formed.

To the patent No. be " ZL201220347243.9 ", patent name is for the mixer disclosed in the patent of " mixer assembly " and compare computing to mixer of the present utility model, assessment rock gas and air mixing situation in a mixer.If the patent No. is " ZL201220347243.9 ", patent name for the mixer disclosed in the patent of " mixer assembly " be scheme one, mixer of the present utility model is scheme two, if combustion gas volume content distribution consistency degree is b, if air and combustion gas mix completely, the value of b should be 1, namely b value is more close to 1, and rock gas and air are mixed to get more even:

$b=1-0.5\×\frac{\mathrm{\Σ}[(\frac{a_i}{a}-1)\×s_i]}{\mathrm{\Σ}{s}_i},$

Wherein, a is combustion gas volume content mean value, a _ifor each point combustion gas volume content, s _ifor each point in measuring surface, have again:

$a=\frac{\mathrm{\Σ}(a_i\×s_i)}{\mathrm{\Σ}{s}_i},$

All analytical calculations herein all use SolidWorks generating three-dimensional models, import in ANSYS by the file converting * .stp form to, use Workbench generating mesh, scheme one, two grid number about 100,000, final utilization FLUENT calculates, and the turbulence model that computation model uses is k-ε two equation turbulence model.

Calculate and adopt stable state to calculate, air (75% nitrogen and 25% oxygen), all given constant mass flow border of natural gas (methane) entrance, outlet is set to constant pressure border, the boundary conditions that table 1 adopts for this analytical calculation:

Table 1

The mixture homogeneity contrast of scheme one, two in outlet port is as shown in table 2:

	Boundary conditions	Measuring surface	The uniformity
				Scheme one		Mixer outlet place	0.766
Scheme two		Mixer outlet place	0.95642263

Table 2

Figure 10 is scheme one mixer outlet place mixing situation distribution map, Figure 11 is scheme two mixer outlet place mixing situation distribution map, from above result, mixer of the present utility model has had significant increase relative to the mixer mixture homogeneity of scheme one, and the mixture homogeneity of the utility model mixer (0.95642263) also reaches top level in industry.

Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present utility model, should be understood to that protection domain of the present utility model is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from the utility model essence according to these technology enlightenment disclosed in the utility model, and these distortion and combination are still in protection domain of the present utility model.

Claims (8)

1. a mixer, the deflector comprising mixing body and be arranged between mixing body air inlet and air outlet, it is characterized in that: described deflector comprises guide ring (1) and is arranged on the diversion column (2) in guide ring (1), guide ring (1) and diversion column (2) are equipped with gas spraying to the some rock gas spray orifices in mixing body.

2. mixer according to claim 1, is characterized in that: described guide ring (1) and diversion column (2) are hollow, and diversion column (2) and guide ring (1) all communicate with each other.

3. mixer according to claim 1 and 2, is characterized in that: described diversion column (2) intersects at the home position of guide ring (1) and guide ring (1) is divided into uniform three parts.

4. mixer according to claim 1 and 2, is characterized in that: the side of described mixing body is provided with rock gas suction port (3), and guide ring (1) communicates with rock gas suction port (3).

5. mixer according to claim 1 and 2, is characterized in that: described mixing body air outlet is provided with contractile ring (4), and the inside diameter that contractile ring (4) contacts with mixed gas reduces gradually along the gas flow of mixed gas.

6. mixer according to claim 1 and 2, is characterized in that: the cross section of described guide ring (1) and diversion column (2) is along air flow water-drop-shaped from large to small.

7. mixer according to claim 1 and 2, is characterized in that: described rock gas spray orifice is evenly arranged on the both sides of guide ring (1) and diversion column (2), and all rock gas spray orifices are positioned at same level.

8. mixer according to claim 1 and 2, is characterized in that: the tangent line of described rock gas spray orifice present position point is parallel with air flow.