CN201068826Y

CN201068826Y - diesel and natural gas double fuel air mixer for diesel motor

Info

Publication number: CN201068826Y
Application number: CNU2007200916348U
Authority: CN
Inventors: 肖华; 李勇
Original assignee: LI YONG XIAO HUA
Current assignee: LI YONG XIAO HUA
Priority date: 2007-08-27
Filing date: 2007-08-27
Publication date: 2008-06-04
Anticipated expiration: 2017-08-27

Abstract

The utility model relates to a diesel and natural gas dual-fuel air mixer used for a diesel engine, the air mixer can effectively solve the problems of increasing the vacuum of the mixer aspiration inlet and adding the sensitivity of the mixer to the vacuum of the air intake pipe. The mixer has the structure that two ends of a pipe body are respectively provided with a pipe mouth body through a transition taper pipe, an inner pipe is arranged in the upper pipe mouth body, L-shaped natural gas intake pipes are arranged in the inner pipe and the pipe body, the natural gas intake pipes extend out of the transition taper pipe at the lower part, an upper circular disk body and a lower circular disk body are arranged inside the pipe body and outside the natural gas intake pipe, the lower part of the upper circular disk body and the upper part of the lower circular disk body are provided with deflector vanes. The utility model can effectively ensure that the operation performance of a diesel and natural gas dual-fuel engine, the structure of the air mixer is simple, the producing cost is low, and the use effect is good, the air mixer is a creative improvement to the prior air mixer, and the economical benefit and the social benefit are obvious.

Description

Used for diesel engine diesel gas double fuel air mixer

One, technical field

The utility model relates to air mixer, relates in particular to a kind of used for diesel engine diesel gas double fuel air mixer.

Two, background technique

At present, domestic existing diesel engine machine mainly contains two types with rock gas-air mixer: a class is the negative inspiratory pressure type, and a class is the malleation spraying.

Negative inspiratory pressure type mixer mainly is the venturi type mixer, and it is the mixer that utilizes Venturi principle to make, and it generally is made up of housing and fuse two-part, and minimum place, fuse larynx footpath is distribution one circle aperture evenly, and the rock gas intake duct is arranged on the housing.This mixer will make the trunnion place produce degree of vacuum to regulate the gas discharge of pressure reducing regulator on the one hand, again rock gas is mixed with even air on the other hand.

For the venturi type mixer of negative inspiratory pressure type, though its structure is simple, because the working speed of diesel engine is relatively low, if the larynx of mixer footpath is excessive, the degree of vacuum that larynx is directly located is just little, insensitive, the rock gas of inspiration is just few, and the power of motor is just low; If mixer larynx footpath is too small, amount of air drawn is just little, influences air fuel ratio, and fuel can not perfect combustion, and motor is less economical, and its power also can descend.The Flow characteristics of venturi type mixer conforms to the characteristic of motor at the moderate duty working condition requirement, but can not adapt to the needs of mixture gas change in concentration well at starting, tire speed and full load mode.These defectives that it had have seriously influenced the service behaviour of diesel oil-CNG duel fuel engine, have restricted the repacking and the popularization of diesel oil-CNG duel fuel engine.

Malleation spraying mixer, main delivery volume of coming control gaseous fuel by electromagnetic injection valve or step motor valve by electronic control unit, the concentration of this mixed gas does not play regulating action, and therefore, it uses and is unsatisfactory.

Three, model utility content

Main purpose of the present utility model is to improve the degree of vacuum of mixer intakeport, increase the receptance of mixer to intake depression, can be according to the load and the enough rock gases of rotating speed inspiration of motor, the unlikely again air quantity of inspiration that causes is little, and engine power is descended.

For achieving the above object, the technical solution adopted in the utility model is as follows:

The utility model is made up of urceolus, guide vane and natural gas tube three parts, it is characterized in that warp excessive Taper Pipe in body two ends is equipped with mouth of pipe body respectively, interior pipe is housed in the upper orifice body, reach the rock gas suction tude that the L type is housed in the body in the interior pipe, the rock gas suction tude is stretched out the excessive Taper Pipe of bottom, the inherent rock gas suction tude of body is equipped with upper and lower disc outward, and guide vane is equipped with on last disc bottom, lower disc body top.

The utility model can make in the pure air that enters the motor cooling cylinder and sneak into rock gas, it is relevant with cylinder degree of vacuum to sneak into amount of natural gas, the size of degree of vacuum in can responsive cylinder and suck a certain amount of rock gas in proportion, can suck enough rock gases according to the rotating speed and the load of motor, can suck the required air quantity of motor proper functioning again, can effectively guarantee the service behaviour of diesel oil-natural gas double fuel engine, it is simple in structure, cost is low, using effect is good, be that economic and social benefit is remarkable to the existing creationary improvement of air mixer.

Four, description of drawings

Fig. 1 is the utility model plan view;

Fig. 2 be among the utility model Fig. 1 A-A to sectional view;

Fig. 3 is the vertical central cross-sectional view of the utility model;

Fig. 4 is a disc plan view on the utility model;

Fig. 5 is the utility model lower disc body plan view;

Fig. 6 is the utility model guide vane plan view;

Fig. 7 is the utility model guide vane plan view.

Five, embodiment

Below describe embodiment of the present utility model with reference to the accompanying drawings in detail:

The utility model as shown in Figure 1, 2, 3 is made up of urceolus, guide vane and natural gas tube three parts, it is characterized in that warp excessive Taper Pipe 3,9 in body 6 two ends is equipped with mouth of pipe body 1 respectively, pipe 2 in being equipped with in the upper orifice body, reach the rock gas suction tude 8 that the L type is housed in the body 6 in the interior pipe 2, rock gas suction tude 8 is stretched out the excessive Taper Pipe 9 of bottom, outside the body 6 inherent rock gas suction tude 8 disc 4, lower disc body 7 are housed, guide vane 5 is equipped with on last disc 4 bottoms, lower disc body 7 tops.

By Fig. 4,5 as can be seen, have air hole 10 on last disc 4 and the lower disc body 7.

By Fig. 6,7 as can be seen guide vane 5 be turbine-like, generally there is the 5-6 sheet to be evenly distributed on the upper and lower disc, rock gas suction tude 8 from urceolus radially penetrate and at circle centre position along the crooked 90 ° of angles of axial direction, L shaped, its outlet is close or concordant with the end of guide vane, guide vane is opening forward, close up after turbine-like.

The utility model is installed in after the air-strainer of diesel engine, before the turbocharger in use.

Claims

1. used for diesel engine diesel gas double fuel air mixer, by urceolus, guide vane and natural gas tube three parts are formed, it is characterized in that body (6) two ends are through excessive Taper Pipe (3,9) mouth of pipe body (1) is housed respectively, interior pipe (2) is housed in the upper orifice body, reach rock gas suction tude (8) that the L type is housed in the body (6) in the interior pipe (2), rock gas suction tude (8) is stretched out the excessive Taper Pipe (9) of bottom, the outer disc (4) that is equipped with of the inherent rock gas suction tude of body (6) (8), lower disc body (7), last disc (4) bottom, guide vane (5) is equipped with on lower disc body (7) top.

2. according to claims 1 described used for diesel engine diesel gas double fuel air mixer, it is characterized in that described going up on disc (4) and the lower disc body (7) has air hole (10).

3. according to claims 1 described used for diesel engine diesel gas double fuel air mixer, it is characterized in that, described guide vane (5) is a turbine-like, there is the 5-6 sheet to be evenly distributed on the upper and lower disc, rock gas suction tude (8) from urceolus radially penetrate and at circle centre position along the crooked 90 ° of angles of axial direction, its outlet and the end of guide vane near or concordant, guide vane is opening forward, closing in after turbine-like.