CN202468063U

CN202468063U - Spiral-blade natural gas mixer for engine

Info

Publication number: CN202468063U
Application number: CN2011205457477U
Authority: CN
Inventors: 张永康; 殷劲松; 戴峰泽; 鲁金忠; 张磊; 罗密
Original assignee: Zhangjiagang Furui Special Equipment Co Ltd
Current assignee: Zhangjiagang Furui Special Equipment Co Ltd
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2012-10-03
Anticipated expiration: 2021-12-23

Abstract

The utility model discloses a spiral-blade natural gas mixer for an engine, which is capable of preventing backfires. The spiral-blade natural gas mixer for the engine comprises a cylindrical shell, wherein a turbofan mainly composed of a main shaft and spiral blades arranged on the main shaft is arranged in an inner hole of the shell, an internal cylinder is arranged on the inner hole wall of the shell and positioned on the air inlet side of the turbofan, an annular groove is formed on the outer wall of the internal cylinder, a plurality of through air inlet holes are formed on the bottom wall of the annular groove in a penetrating way, a nozzle is arranged in each air inlet hole, an air inlet communicated with the annular groove is formed on the shell, the two ends of the main shaft are respectively and movably arranged on the inner wall of the shell by a support, and an air inlet/outlet through hole is formed on the support. According to the utility model, the turbofan structure can form a negative pressure area near the air inlet of the mixer and form a positive pressure area near an air outlet of the mixer, so that the spiral-blade natural gas mixer can effectively avoid the phenomenon of'backfire' caused by the factors, such as insufficient air inlet and the ignition of mixed gases by backflow high-temperature and superheated waste gases, which are resulted from the backflow of the high-temperature and superheated waste gases.

Description

Motor is used the screw blade mixer for natural gas in use

Technical field

The utility model relates to a kind of mixer for natural gas in use, refers more particularly to a kind of mixer for natural gas in use that is used for natural gas engine.

Background technique

Motor is used mixer for natural gas in use, is the critical component of natural gas engine air supply system, and its effect is that air and rock gas are fully mixed the back supply engine.Full and uniform mixed gas effect can improve the Economy of motor greatly, dynamic property and reduction exhaust emissions.

The patent ZL01214110.0 that patent ZL89213221.3 and the model utility name that the model utility name is called " gas-fueled vehicles engine gas mixer " is called " the special-purpose fuel gas mixer of automobile with compressed natural gas " has proposed at mixer an inner chamber to be installed, and arranges that on the inner chamber cross section row's rock gas spray orifice improves the uniformity of air and rock gas mixed gas; The patent ZL200510018722.0 that the model utility name is called " mixer for natural gas in use for engine " has improved above-mentioned rock gas air intake structure again; Row's rock gas spray orifice has all been arranged in cross section and longitudinal cross-section at inner chamber; Increased the mixing distance, the uniformity of mixed gas is further enhanced; The patent ZL200620001035.8 that the model utility name is called used for diesel engine rock gas-air mixer has proposed a kind of structure of utilizing guide vane mixed gas and air.

Above-mentioned several kinds of mixer for natural gas in use have all improved the uniformity of mixed gas to a certain extent, but in the face of the engine power of raising day by day and the requirement of energy-saving and emission-reduction, these rock gas mixed gass also exist the uniform inadequately shortcoming of mixed effect.And owing to reasons such as accuracy of manufacturing, the waste gas of the high heat of high temperature can be back to mixer, thereby influences the air inflow of mixed gas; Simultaneously, because mixed gas is lighted by the waste gas of the high heat of high temperature, cause " tempering " phenomenon.

The model utility content

The utility model technical problem to be solved is: provide a kind of motor of tempering that can prevent to use the screw blade mixer for natural gas in use.

For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: motor is used the screw blade mixer for natural gas in use, comprising: columnar shell; Be provided with in the shell endoporus mainly by main shaft be arranged on the turbofan that the screw blade on the main shaft constitutes; Air inlet one side that is positioned at turbofan on the inner hole wall of shell is provided with inner core, offers annular groove on the outer wall of inner core, is equipped with the inlet hole of several perforations on the diapire of annular groove; Be provided with nozzle in the inlet hole; Offer the suction port that communicates with annular groove on the shell, the two ends of said main shaft are movably arranged on the inwall of shell through support respectively, and support is provided with the turnover vent hole.

The utility model further technical problem to be solved is: the motor that a kind of uniformity that can improve rock gas and air mixing is provided, improves mixed effect is used the screw blade mixer for natural gas in use.

For solving above-mentioned further technical problem, the technological scheme that the utility model adopts is: described nozzle and suction port axially stagger along main shaft each other.

It is conical that the spray orifice of said nozzle is.

Have the gas mixed hole of a plurality of perforations on the described screw blade.

The middle part of said main shaft is provided with conical section, and described screw blade is arranged on the conical section of main shaft.

Described suction port comprises: at least one pair of is along circumferentially evenly being opened in the inlet hole on the shell.

The two ends of said shell endoporus are respectively arranged with the mounting hole of diameter greater than endoporus, and the mounting hole at endoporus and two ends forms hierarchic structure, and described inner core, support are installed in the mounting hole of the corresponding side of shell.

The two ends of said turbofan main shaft are arranged on the support through bearing respectively.

Described support comprises: inside and outside two ring frameworks are inner frame and outer skeleton, link together through several spokes between the inside and outside skeleton, form a plurality of turnover vent holes between inside and outside skeleton and the spoke.

The beneficial effect of the utility model is following:

1, the utility model turbofan structure; Can near air inlet, form negative pressuren zone; Better suck air; Simultaneously, near the mixer air outlet, form zone of positive pressure, can prevent effectively that the high hot waste gas of high temperature that backflow and the for example deficiency of air that causes and the mixed gas of the waste gas of the high heat of high temperature are refluxed from lighting and cause " tempering " phenomenon.

2, the rock gas suction port on the shell; The position of the suction port that forms with a plurality of nozzles on the inner core misplaces fully; Do not have the overlap region, can make get into annular groove from suction port rock gas with average pressure distribution at annular space, make the rock gas pressure difference of each nozzle ejection littler; That is: a plurality of nozzle suction pressures from the inner core are relatively more balanced, improved preliminary uniformity of mixing mixed gas behind the gas.

3, the rock gas suction port on the inner core adopts conical nozzle, and mode and the air mixing of rock gas to disperse improved the uniformity that air and natural gas via tentatively mix the back mixed gas to a great extent.

4, offer gas mixed hole on the screw blade of turbofan, mixed gas can pass the gas mixed hole on a plurality of screw blades before arriving the air outlet, thus guaranteed mixed gas through the turbofan district time by full and uniform mixing.

5, the main shaft portion of the screw blade of dress turbofan is processed into conical structure; Make that direction tends to concentrate mixed gas along the air outlet; Flowing of mixed gas is more reasonable; Further guaranteed the mixed effect of gas mixed hole, because mixed airflow is had compression, therefore also had certain pressurized effect simultaneously mixed gas.

Description of drawings

Fig. 1 is the structural representation of the described mixer for natural gas in use of the utility model;

Fig. 2 is the structural representation of turbofan among Fig. 1.

Fig. 3 is the structural representation of Fig. 1 medium-height trestle.

Fig. 4 is the structural representation of inner core among Fig. 1.

Fig. 5 is a structure of nozzle schematic representation among Fig. 1.

Among Fig. 1 to Fig. 5: 1, motor, 21, driving gear, 22, driven gear, 3, turbofan, 31, main shaft, 311, conical section; 312, square key keyway, 32, screw blade, 321, gas mixed hole, 4, bearing, 5, support, 51, inner frame; 52, spoke, 53, outer skeleton, 54, the turnover vent hole, 6, shell, 61, air inlet, 62, inlet hole; 63, mixed gas air outlet, 7, inner core, 71, annular groove, 72, inlet hole, 8, nozzle, 81, spray orifice.

Embodiment

As shown in Figure 1, a kind of motor is used the screw blade mixer for natural gas in use, comprising: columnar shell 6; Be provided with turbofan 3 in shell 6 endoporus; As shown in Figure 2, the concrete structure of turbofan 3 comprises: main shaft 31, the middle part of main shaft 31 are provided with along the ascending conical section 311 of airflow direction; Conical section 311 is provided with screw blade 32, has the gas mixed hole 321 of a plurality of perforations on the screw blade 32; Air inlet one side that is positioned at turbofan 3 on the inner hole wall of said shell 6 is provided with inner core 7; As shown in Figure 4; Offer annular groove 71 on the outer wall of said inner core 7; Be equipped with the inlet hole 72 of several perforations on the diapire of annular groove 71, be provided with the nozzle 8 of conical spray orifice 81 in the inlet hole 72---referring to shown in Figure 5, described shell 6 upper edges circumferentially evenly offer a pair of inlet hole 62 that communicates with annular groove 71; Described nozzle 8 and this a pair of inlet hole 62 axially staggering each other along main shaft 31; The two ends of said shell 6 endoporus are respectively arranged with the mounting hole of diameter greater than endoporus, and the mounting hole at endoporus and two ends forms hierarchic structure, and described inner core 7 and one of them support 5 are installed in the mounting hole of turbofan 3 air inlets one side of shell 6; The turbofan 3 that another support 5 is installed in shell 6 is given vent to anger in the mounting hole of a side, and the two ends of said main shaft 31 are arranged in the support 5 of a corresponding side through bearing 4 respectively.In the present embodiment; As shown in Figure 3; The concrete structure of described support 5 comprises: inside and outside two ring frameworks are inner frame 51 and outer skeleton 53, link together through six spokes 52 between the inside and

outside skeleton

51 and 53, inside and

outside skeleton

51 and 53 with spoke 52 between six of formation pass in and out vent holes 54; Six turnover vent holes 54 that are positioned on the support 5 of turbofan 3 air inlets one side constitute air inlets 61, are positioned at six turnover vent holes 54 that turbofan 3 gives vent to anger on the support 5 of a side and constitute mixed gas air outlets 63.During practical application; The end that said main shaft 31 is positioned at turbofan 3 air inlets one side stretches out shell 6; Main shaft 31 is fixed together through the square key close-fitting through square key keyway 312 that is opened in this end end and the driven gear 22 that offers the square key keyway equally, and (this belongs to the ordinary skill in the art; So square key keyway and square key on the driven gear 22 all do not draw), driven gear 22 and the driving gear 21 that is arranged on the main shaft of motor 1 mesh together.

The working principle of the utility model is: motor 1 drives turbofan 3 through the gear pair that is made up of driving gear 21 and driven gear 22 and rotates, and near suction port 61, produces negative pressure, sucks air; Air passes the i.e. space between the spoke 52 of this side support 5 of suction port 61 of the support 5 of turbofan 3 air inlets one side, gets into inner core 7; In inner core 7, rock gas tentatively mixes with air through the spray orifice 81 of a plurality of nozzles 8; Mixed gas gets into the vane region of turbofan 3 then; Mixed gas along the screw blade 32 of the conical section 311 at main shaft 31 middle parts and turbofan 3 to the mixed gas air outlet 63 of the support 5 of the side of giving vent to anger at turbofan 3 promptly the space direction between the spoke 52 of this side support 5 move; Under the stirring action of the gas mixed hole 321 of screw blade 32, mixed gas obtains full and uniform mixing.

Claims

1. motor is used the screw blade mixer for natural gas in use; Comprise: columnar shell; It is characterized in that: be provided with mainly by main shaft (31) in shell (6) endoporus and be arranged on the turbofan (3) that the screw blade (32) on the main shaft (31) constitutes; Air inlet one side that is positioned at turbofan (3) on the inner hole wall of shell (6) is provided with inner core (7), offers annular groove (71) on the outer wall of inner core (7), is equipped with the inlet hole (72) of several perforations on the diapire of annular groove (71); Be provided with nozzle (8) in the inlet hole (72); Offer the suction port that communicates with annular groove (71) on the described shell (6), the two ends of said main shaft (31) are movably arranged on the inwall of shell (6) through support (5) respectively, and support (5) is provided with turnover vent hole (54).

2. mixer for natural gas in use as claimed in claim 1 is characterized in that: described nozzle (8) and suction port axially staggering each other along main shaft (31).

3. mixer for natural gas in use as claimed in claim 1 is characterized in that: the spray orifice (81) of described nozzle (8) is conical.

4. mixer for natural gas in use as claimed in claim 1 is characterized in that: the gas mixed hole (321) that has a plurality of perforations on the described screw blade (32).

5. mixer for natural gas in use as claimed in claim 1 is characterized in that: the middle part of said main shaft (31) is provided with conical section (311), and described screw blade (32) is arranged on the conical section (311) of main shaft (31).

6. like each described mixer for natural gas in use in the claim 1 to 5, it is characterized in that: described suction port comprises: at least one pair of is along the inlet hole (62) that circumferentially evenly is opened on the shell (6).

7. like each described mixer for natural gas in use in the claim 1 to 5; It is characterized in that: the two ends of said shell (6) endoporus are respectively arranged with the mounting hole of diameter greater than endoporus; The mounting hole at endoporus and two ends forms hierarchic structure, and described inner core (7), support (5) are installed in the mounting hole of the corresponding side of shell (6).

8. like each described mixer for natural gas in use in the claim 1 to 5, it is characterized in that: the two ends of said turbofan (3) main shaft (31) are arranged on the support (5) through bearing (4) respectively.

9. like each described mixer for natural gas in use in the claim 1 to 5; It is characterized in that: described support (5) comprising: inside and outside two ring frameworks are inner frame (51) and outer skeleton (53); Inside and outside skeleton links together through several spokes (52) between (51 and 53), forms a plurality of turnover vent holes (54) between inside and outside skeleton (51 and 53) and the spoke (52).