CN102200044A

CN102200044A - Secondary air control valve

Info

Publication number: CN102200044A
Application number: CN2011100704190A
Authority: CN
Inventors: 神先省吾; 内藤直生; P·圭迪; B·帕尔默
Original assignee: Denso International America Inc
Current assignee: Denso International America Inc
Priority date: 2010-03-22
Filing date: 2011-03-21
Publication date: 2011-09-28
Anticipated expiration: 2031-03-21
Also published as: US20110225960A1; JP5540802B2; CN102200044B; DE102011001432A1; DE102011001432B4; JP2011196291A

Abstract

The invention discloses a secondary air control valve. A secondary air control valve connected to an exhaust system (3) includes a passage forming member 5, 6 and a valve mechanism 7. The passage forming member includes a container unit (61, 61a, 61b) and a plurality of fins (9). The container unit that defines therein an exit cavity (62) and an exit passage (64). The plurality of fins projects from the container unit into the exit cavity such that the plurality of fins collides with counter-flow exhaust gas that counter-flows in a direction from the exit passage to the exit cavity through the first opening. The plurality of fins divides the exit cavity into a plurality of cavities, in which counter-flow exhaust gas forms a plurality of vortex flows.

Description

Auxiliary air control valve

Technical field

The present invention relates to a kind of auxiliary air control valve, it is to the vent systems feed auxiliary air of internal-combustion engine.

Background technique

Patent document JP-A-2005-520097 has described a kind of auxiliary air control valve.This auxiliary air control valve is connected with vent systems, so that the vent systems feed auxiliary air of flowing through to waste gas.Sometimes waste gas is understood reverse flow, flows to the inner passage of auxiliary air control valve from vent systems.The temperature of above-mentioned contra-flow exhaust gases is higher than the temperature of auxiliary air, and may comprise harmful constituent in the waste gas.The component that for example, may comprise corrosive component or sticking stickiness in the waste gas.

In order to stop the reverse flow of waste gas, prior art has proposed a kind of structural design, and in this structural design, the passage that is positioned at the auxiliary air control valve downstream has tortuous shape.In addition, prior art has also proposed a kind of baffle plate that stops the waste gas adverse current.In addition, prior art has proposed a kind of radiating fin, and it is set on the member that forms downstream passage.

For this structural design of prior art, disadvantageously, can not eliminate effectively contra-flow exhaust gases with heat.In other words, because tortuous passageway is the U-shaped shape, so disadvantageously, the heat of contra-flow exhaust gases is difficult to pass to the housing structure that forms tortuous passageway.As a result, the movable member of auxiliary air control valve can have too high temperature.

In addition, in the tortuous passageway of prior art,, so disadvantageously, can't fully weaken flowing of contra-flow exhaust gases because contra-flow exhaust gases is along single path flow.

In addition, disadvantageously, the tortuous passageway of prior art has also produced resistance mistakenly to the normal airflow of the auxiliary air that flows to vent systems, is similar to the resistance that the waste gas to adverse current produces.In other words, the tortuous passageway of routine techniques can be exerted pressure mistakenly to the auxiliary air that flows to vent systems and be fallen, and this pressure drop equals to impose on the pressure drop of contra-flow exhaust gases.As a result, the auxiliary air that is difficult to the big flow of feed.

In addition, in the prior art, owing to be provided with baffle plate in addition, so strengthened the number of parts unfriendly.

Summary of the invention

In view of above-mentioned defective, made the present invention, thereby, the object of the present invention is to provide a kind of auxiliary air control valve of avoiding the contra-flow exhaust gases influence.

Another object of the present invention provides a kind of auxiliary air control valve, and it can eliminate the heat of contra-flow exhaust gases effectively.

A further object of the present invention provides a kind of auxiliary air control valve, and it can slacken flowing of contra-flow exhaust gases effectively.

Another purpose of the present invention is to provide a kind of auxiliary air control valve, and it can slacken flowing of contra-flow exhaust gases effectively, and can exceedingly not increase the resistance of auxiliary air proper flow.

Another object of the present invention is to provide a kind of auxiliary air control valve, and it is simple in structure, and avoids the influence of contra-flow exhaust gases.

In order to realize purpose of the present invention, the application provides a kind of auxiliary air control valve that is connected with vent systems, vent systems wherein allows waste gas from wherein flowing through, wherein, this assist control control valve is to vent systems feed auxiliary air, and auxiliary air control valve comprises that passage forms member and valve system.Passage has formed component limit through this passage with auxiliary air feed supply and exhaust system.Valve system is set in the passage.Passage forms member and comprises container unit and a plurality of fin.Outlet chamber and outlet passageway have been formed in the container unit.Outlet chamber is set between valve system and the vent systems.Outlet passageway has first opening that is communicated with outlet chamber and second opening that is communicated with vent systems.A plurality of fins project into the outlet chamber from container unit so that the waste gas of fin and adverse current collides, the waste gas of adverse current through first opening from outlet passageway to the outlet chamber reverse flow.A plurality of fins are divided into a plurality of chambers with outlet chamber, and contra-flow exhaust gases has formed a plurality of eddy current in these chambers.

Description of drawings

Can most clearly understand the present invention and other goal of the invention, feature and advantage from following description, appending claims and accompanying drawing, in the accompanying drawings:

Partial sectional view illustration among Fig. 1 according to the auxiliary air control valve of first embodiment of the invention;

Plan view illustration among Fig. 2 the inside of auxiliary air control valve of first mode of execution; And

Plan view illustration among Fig. 3 according to the inside of the auxiliary air control valve of second embodiment of the invention.

Embodiment

Hereinafter be described implementing a plurality of mode of execution of the present invention with reference to the accompanying drawings.In each mode of execution, the parts of having described in the last mode of execution will be referred to by identical number designation, and omit the introduction to these parts.Under certain conditions, will only be described part-structure in each mode of execution, then be in the description of last mode of execution to the introduction of other parts structure.The parts of each several part or structure can make up as required mutually in each mode of execution, even these compound modes are not proposed in the description of mode of execution clearly, as long as these combinations are not significantly difficult.

(first mode of execution)

Fig. 1 is the partial sectional view that dissects along the I-I line among Fig. 2, is used to represent the auxiliary air control valve according to first embodiment of the invention.Fig. 2 is a plan view, has represented the inside of the auxiliary air control valve of first mode of execution, and this view is the II-II line in Fig. 1, along observing resulting from valve system to the direction of second body.

Auxiliary air feeder 1 is to the vent systems supply air of internal-combustion engine.This internal-combustion engine is as the power source of vehicle, air-conditioning or generator.In this embodiment, this internal-combustion engine is as the power source that is installed on the vehicle.The air of feed supply and exhaust system is called as auxiliary air.Auxiliary air carries out oxidation to the component in the waste gas.As a result, for example can improve the quality of waste gas component, perhaps reactivate emission-control equipment.Auxiliary air feeder 1 is incorporated into air the downstream position of the air-strainer in the gas handling system 2.Utilize pump that air is pressurizeed.Auxiliary air feeder 1 is given the auxiliary air feed vent systems 3 at immediate vicinity place, combustion chambers of internal combustion engines downstream.Auxiliary air feeder 1 has the auxiliary air control valve 4 between gas handling system 2 and vent systems 3.Auxiliary air control valve 4 can allow flowing of flow of secondary air and blocking-up auxiliary air, and can also control the amount of auxiliary air as required.Auxiliary air control valve 4 is arranged between the gas handling system 2 and vent systems 3 of internal-combustion engine.Auxiliary air control valve 4 is connected with vent systems 3, and the waste gas of internal-combustion engine flow in the vent systems 3, and control valve 4 is to vent systems 3 feed auxiliary airs.In addition, auxiliary air control valve 4 is arranged on such position, and promptly on this position, a part of waste gas of vent systems 3 is to auxiliary air control valve 4 reverse flows (or backflow).

Auxiliary air control valve 4 comprises that the passage that limits passage forms member, and this member has formed auxiliary air and has been fed to the passage that vent systems 3 is flowed through.Passage forms member and comprises first body 5 and second body 6.First body 5 is defined for the passage of gas handling system 2, and second body 6 is defined for the passage of vent systems 3.In by first body 5 and second body, 6 formed auxiliary air channel, be provided with valve system 7.Valve system 7 has motor-driven valve 71 and check valve 75.

First body 5 is also referred to as the upper body.First body 5 has suction tude 51, and this suction tude is connected with the pipeline that auxiliary air is introduced from gas handling system 2.Define gas-entered passageway 52 and center-aisle 53 in the suction tude 51 of first body 5.Center-aisle 53 is cylindrical cavity.First body 5 has valve seat 54, and this valve seat 54 is between gas-entered passageway 52 and center-aisle 53.Valve seat 54 defines valve base channel.Valve seat 54 is also as the constituent element of motor-driven valve 71, and is described below.Gas-entered passageway 52 has straight section part and crank throw part.The straight section part is extended on the axial direction of suction tude 51, and the crank throw part bends towards center-aisle 53 with the right angle angle basically.Valve seat 54 is configured to center-aisle 53 coaxial.Gas-entered passageway 52, valve base channel and center-aisle 53 have constituted air-inlet cavity.

First body 5 defines accommodating chamber, is holding motor-driven valve 71 in this accommodating chamber.Motor-driven valve 71 has movable valve 72, driving mechanism 73 and the motor 74 of mushroom-like.Movable valve 72 has valve element (valve element) and bar shaft portion.The valve element is set in the center-aisle 53, and is circular plate type.The bar shaft portion extends to the gas-entered passageway 52 from the valve element.On the axial direction of valve 72, driving mechanism 73 is based on the rotation of motor 74 and reciprocally drive movable valve 72.Driving mechanism 73 comprises a plurality of gears and has the reducing gear of tooth bar-gear mechanism.Movable valve 72 in axial direction moves between valve operating position and valve opening position, and wherein, on the valve operating position, movable valve 72 falls to being sitting on the valve seat 54; On valve opening position, movable valve 72 lifts away from valve seat 54.In addition, when the amount of lifting away from that movable valve 72 is lifted away from valve seat 54 is adjusted, thereby can adjust the through flow cross section of auxiliary air when long-pending, can regulate and control the flow of auxiliary air.

Check valve 75 is set to hiding the center-aisle 53 of first body 5.Check valve 75 allows along from the direction proper flow of gas handling system 2 to vent systems 3.In addition, check valve 75 stops along from the other direction reverse flow of vent systems 3 to gas handling system 2.Check valve 75 has dunnage 76 and leaf valve 77.Dunnage 76 is set to hide on the opening of center-aisle 53.The approximate centre position of dunnage 76 has the through hole of the extension of connecting.Leaf valve 77 is made by spring steel.Leaf valve 77 is set on such position: on the direction of proper flow, this position is positioned at the downstream of above-mentioned through hole.Leaf valve 77 is set to hide fully through hole.One end of leaf valve 77 is used as fixed end, and it is fixed on the dunnage 76.In addition, the other end of leaf valve 77 is as free end, and it is removable to lift away from dunnage 76.In addition, dunnage 76 has backstop 78, the maximum amount of lifting away from of its control leaf valve 77.

Second body 6 is also referred to as lower body.Second body 6 is set at the position of first body, 5 belows, is holding check valve 75 in second body.In the downstream position of valve system 7, second body 6 defines the passage that is used for auxiliary air.Second body 6 has container unit 61, steam outlet pipe 63 and supporting frame 67.Container unit 61 is tubular, and has the bottom.Steam outlet pipe 63 extends from container unit 61, and supporting frame 67 extends from container unit 61.Steam outlet pipe 63 is connected on the outlet pipe of vent systems 3.Supporting frame 67 is fixed on the internal-combustion engine, so that supporting auxiliary air control valve 4.

Formed outlet chamber 62 in the container unit 61 of second body 6, this outlet chamber 62 is between valve system 7 and vent systems 3.Outlet chamber 62 is positioned at the downstream of valve system 7.Outlet chamber 62 is flat rectangular parallelepiped protrusion part shape.

Container unit 61 has the sidewall 61a and the diapire 61b of tubulose.Sidewall 61a has opening near an end of valve system 7, and diapire 61b is set at the other end of sidewall 61a.Sidewall 61a is the round rectangle pipe.Sidewall 61a extends from valve system 7 in a longitudinal direction.The longitudinal axis of sidewall 61a is parallel to the longitudinal axis of center-aisle 53.Hereinafter, the axial direction of sidewall 61a is called as vertically.In other words, the above-below direction among Fig. 1 is called as longitudinal direction.

Container unit 61 has formed outlet passageway 64 with steam outlet pipe 63, and this outlet passageway 64 has first opening 65 that (a) be communicated with outlet chamber 62 and second opening 66 that (b) is communicated with vent systems 3.First opening 65 is opened on sidewall 61a.First opening 65 is opened on sidewall one side at place, separatrix between sidewall 61a and the diapire 61b.The lower end of first opening 65 overlaps basically with the internal surface of diapire 61b.Outlet passageway 64 forms has axis AX64, and this axis AX64 is arranged essentially parallel to the internal surface of diapire 61b.As a result, the internal surface of diapire 61b is that virtual line stretcher along outlet passageway 64 extends.In addition, outlet passageway 64 extends along horizontal direction, and its bearing of trend and described longitudinal direction intersect.In addition, outlet passageway 64 is in the tilted angle, and makes outlet passageway 64 away from the displacement on valve system 7 directions be function apart from the distance of outlet chamber 62.

In the plan view of Fig. 2, outlet passageway 64 extends radially outward out from

outlet chamber

62, and 61a is in the tilted angle with respect to sidewall.In other words, in plan view, the axis AX64 of outlet passageway 64 is along extending with the tangent direction of the inscribed circle of sidewall 61a basically.

Internal surface near the sidewall 61a of steam outlet pipe 63 has formed inclined-plane 61d, and inclined-plane 61d is in the tilted angle, so that facing to the opening of container unit 61.Have first opening 65 on formed this inclined-plane near the internal surface of the sidewall 61a of steam outlet pipe 63.Diapire 61b is configured to angle tilt, partly locates so that diapire 61b is in the lowest part of first opening 65.Diapire 61 is formed by two inclined-planes, angle slightly mutually between these two inclined-planes.Two inclined-planes intersect and have formed valley line 61e, and as shown in the plan view of Fig. 2, this valley line 61e extends along the direction of crossing outlet chamber 62 from first opening 65.As a result, outlet passageway 64 extends downwards in inclination mode shown in Figure 1 from the lowest part part of diapire 61b.

In auxiliary air control valve 4, when motor-driven valve 71 is unlocked, to vent systems 3 feed auxiliary airs.Auxiliary air flows through gas-entered passageway 52, motor-driven valve 71, center-aisle 53, check valve 75, outlet chamber 62, first opening 65, outlet passageway 64 and second outlet 66 successively.The air-flow FF of above-mentioned auxiliary air is called as normal flow.In contrast, the waste gas in the vent systems 3 may flow into the outlet chamber 62 through first opening 65 from passage 64.The above-mentioned waste gas of reverse flow is called as contra-flow exhaust gases.The contra-flow exhaust gases outlet passageway 64 of flowing through, and then flow in the outlet chamber 62 along the internal surface of diapire 61b first opening 65 of flowing through.The outlet passageway 64 and first opening 65 form and can produce above-mentioned contra-flow exhaust gases.

Second body 6 that forms member as passage has a plurality of fins 8, and these fins 8 project into the outlet chamber 62 from container unit 61.These a plurality of fins 8 can be called as inner fins.Fin 8 is configured to collide mutually with contra-flow exhaust gases.In addition, a plurality of fins 8 are divided into a plurality of little chambers (or little chamber portion) with outlet chamber 8.In other words, a plurality of fins 8 have formed a plurality of little chambers in outlet chamber 62.Particularly, a plurality of fins 8 have formed a plurality of capacitors in outlet chamber 62, so that contra-flow exhaust gases forms a plurality of eddy current, these eddy current flows are to each capacitor.In above-mentioned structure, waste gas is from first opening 65 reverse flow into outlet chamber 62 of outlet passageway 64 through outlet passageway 64.As mentioned above, a plurality of fins 8 stretch out from container unit 61 in outlet chamber 62.As a result, this may increase the surface area that carries out heat exchange with contra-flow exhaust gases.Thereby this may eliminate the heat in the contra-flow exhaust gases effectively.In addition, a plurality of fins 8 make contra-flow exhaust gases form a plurality of eddy current.As a result, this may weaken flowing of contra-flow exhaust gases.

Hereinbefore, fin 8 is not by limiting the chamber of sealing fully around a certain space.The chamber that is limited by fin 8 is open on the short transverse of sidewall 61a.In addition, the chamber that is limited by fin 8 utilizes above-mentioned opening to realize opening, and wherein, air flows into or flow container unit 61 through above-mentioned opening.As mentioned above, in this embodiment, if fin 8 fully limits this space, by way of example, fin 8 will extend to another part of sidewall 61a from the part of sidewall 61a, thereby fin 8 will stop the effluent of air along the direction parallel with diapire 61b from fin 8 to opposite side.But for example, as shown in Figure 2, neither one fin 8 couples together a part and another part of sidewall 61a across outlet chamber 62.As a result, in this embodiment, the qualification of fin 8 is incomplete, therefore, is understandable that, the chamber in this mode of execution is not by complete closed.From another angle, single fin 8 is configured to limit this zone, so that there is the air-flow of different direction in the both sides of single fin 8.

All fins 8 all are connected with diapire 61b.Comprise fin 81 that is connected and the fin 82 that separates in a plurality of fins 8.The fin 81 that is connected all is connected with diapire 61b with sidewall 61a.82 of fins that separates are connected with diapire 61b, but separate with sidewall 61a.Be similar to jetty, the fin 81 that is connected projects into the outlet chamber 62 from sidewall 61a.As a result, the fin 81 and the sidewall 61a that are connected have surrounded terminal chamber (terminal cavity), the radially outer end of sealing.The fin 82 that separates form with sidewall 61a be island in the separated outlet chamber 62.As a result, the fin 82 of separation defines around the annular chamber of the fin 82 that separates.In above-mentioned structure, contra-flow exhaust gases is owing to collide with the fin 82 that separates with the fin 81 that is connected, thus flow with the form of complexity, thus weaken the mobile of contra-flow exhaust gases effectively.

All fins 8 all are board members, and these board members stretch out along the longitudinal direction from diapire 61b, perhaps in other words, are along projection on the short transverse of sidewall 61a.In addition, all fins 8 all are such board members, and promptly it is made of the surface that comprises the straight line that extends along the longitudinal direction.As a result, all fins 8 are divided into a plurality of away minor segment of arranging along horizontal direction with outlet chamber 62, but outlet chamber 62 are not divided into a plurality of away minor segment of arranging along the longitudinal direction.In addition, all fins 8 all are dull and stereotyped.

The height of all fins 8 is all less than the height of sidewall 61a.In other words, all fins 8 have the edge of close valve system 7, and the height level at described edge is similar to sidewall 61a level in vertical direction.As a result, between a plurality of fins 8 and valve system 7, formed the non-finned chamber 62a that does not have fin.Non-finned chamber 62a extends along the opening of sidewall 61a.In other words, shown in sectional view like that, outlet chamber 62 comprises near the first half chamber portion 62a of valve system 7 with near the second half chamber portion 62b of diapire 61b.The first half chamber portion 62a near valve system 7 are non-finned chamber 62a.Near the second half chamber portion 62b of diapire 61b can be called as have a plurality of fins 8 in it fin chamber 62b arranged.On the short transverse of sidewall 61b, non-finned chamber 62a and have fin chamber 62b to be interconnected without barrier.With vertically perpendicular direction on, perhaps in other words, along being roughly parallel on the direction of diapire 61b, air can be mobile in non-finned chamber 62a without any obstacle ground.But owing to there are a plurality of fins 8 on the flow path of air, the perpendicular direction of the mobile edge of air and longitudinal direction is regulated and control in fin chamber 62b is arranged.The whole of first opening 65 are oriented to facing to fin chamber 62b is arranged.

In above-mentioned structure, the auxiliary air that flow in the outlet chamber 62 through valve system 7 will arrive first opening 65 of outlet passageway 64 through non-finned chamber 62a with fin chamber 62b is arranged.As a result, when auxiliary air flowed in non-finned chamber 62a, auxiliary air can not collide fin 8.In addition, because fin 8 projection on the short transverse of sidewall 61a, so the auxiliary air that flow in the outlet chamber 62 through valve system 7 will flow on the short transverse of sidewall 61a along fin 8.Thus, under the prerequisite that does not exceedingly increase the resistance of auxiliary air normal flow, may weaken flowing of contra-flow exhaust gases.

Observe plan view, a plurality of fins 8 roughly radially are arranged in the outlet chamber 62.Above-mentioned structure produces slight drag to the auxiliary air normal flow, causes that the normal flow of auxiliary air flows in outlet chamber 62 along the longitudinal direction.In contrast, said structure has produced big resistance to contra-flow exhaust gases mobile, makes contra-flow exhaust gases flow at outlet chamber 62 mesoscale eddies along sidewall 61a.

A plurality of fins 8 comprise a plurality of

terminal subregion fin

81a, 81b, 81c, 81d.All

terminal subregion fin

81a, 81b, 81c, 81d are the fins 81 that is connected.

Terminal subregion fin

81a, 81b, 81c, 81d are divided into a plurality of terminal chambers with the inner space of outlet chamber 62.In addition,

terminal subregion fin

81a, 81b, 81c, 81d are slit into the multiply air-flow with the contra-flow exhaust gases flow point, and these air-flows are directed into each corresponding terminal chamber.

Terminal subregion fin

81b, 81c, 81d radially are arranged in the outlet chamber 62.Terminal subregion fin 81a is arranged to be roughly parallel to the axis of outlet passageway 64.In above-mentioned structure, contra-flow exhaust gases is divided into the multiply air-flow, and the multiply air-flow is directed into a plurality of terminal chambers separately.As a result, may slacken flowing of contra-flow exhaust gases effectively.

A plurality of fins 8 comprise obstacle fin 82a,

82b.Obstacle fin

82a, 82b are arranged on the virtual line stretcher of outlet passageway 64, so that

obstacle fin

82a, 82b and contra-flow exhaust gases are directly collided.

Obstacle fin

82a, 82b are divided at least the first air-flow R1 and the second air-flow R2 with contra-flow exhaust gases.Obstacle fin 82a is arranged to extend along sidewall

61a.Obstacle fin

82a, 82b curve the first air-flow R1 of contra-flow exhaust gases along the direction with respect to the axis AX64 perpendicular of outlet passageway 64.Obstacle fin 82a makes the second air-flow R2 of contra-flow exhaust gases flow along sidewall 61a.In above-mentioned structure, because contra-flow exhaust gases is direct and

obstacle fin

82a, 82b collide, so may slacken flowing of contra-flow exhaust gases effectively.In addition, contra-flow exhaust gases is divided into the multiply air-flow, and these air-flows comprise at least the first air-flow R1 and the second air-flow R2.As a result, may slacken each strand air-flow of being cut apart effectively.

Comprise guide fins 82c in a plurality of fins 8.Guide fins 82c is arranged on the virtual elongation line of obstacle fin 82a, 82b.Guide fins 82c makes the second air-flow R2 flow along sidewall 61a.

A plurality of fins 8 also comprise central subregion fin 82e, and it limits first chamber and second chamber in outlet chamber 62.In plan view, the right half part of outlet chamber 62 is corresponding to first chamber, and left-half is corresponding to second chamber.The first air-flow R1 mainly is introduced in first chamber.The second air-flow R2 mainly is introduced in second chamber.Should be noted in the discussion above that

obstacle fin

82a, 82b also define first chamber and second chamber in outlet chamber 62 when from 65 observations of first opening.Between central subregion fin 82e and obstacle fin 82b, formed the gap.This gap allows the part contra-flow exhaust gases from then on to flow through.In above-mentioned structure, central subregion fin 82e limits first chamber and second chamber by halves in going out to flow chamber 62.As a result, may slacken each strand air-flow R1, the R2 of being cut apart effectively.

Alternately, for example couple together with another relative part of sidewall 61a by the part with sidewall 61a, central subregion fin 82e can fully limit first chamber and second chamber in outlet chamber 62.

A plurality of fins 8 comprise eddy current guide fins 82d, 82f, 82g, 82h, and these fins are set to the island in the outlet chamber 62.In this manual, word " is set to the fin of island " and is meant fin and is arranged to separate with sidewall 61a.Eddy current guide fins 82d, 82f, 82g, 82h define annular cavity, and this makes contra-flow exhaust gases form the eddy current that flows around these eddy current guide fins 82d, 82f, 82g, 82h.In said structure, there are at least one the eddy current guide fins 82d, 82f, 82g, the 82h that form the island of being arranged in the outlet chamber 62.As a result, formation is round the annular cavity of eddy current guide fins 82d, 82f, 82g, 82h.At least a portion in the contra-flow exhaust gases forms eddy current in annular cavity.Thereby, may in outlet chamber 62, slacken contra-flow exhaust gases effectively.

Terminal subregion fin

81a, 82b, 81c, 81d comprise (a) first

terminal subregion fin

81a, 81b, and they are set in first chamber; And (b) the second

terminal subregion fin

81c, 81d, they are set in second chamber.In above-mentioned structure, the first air-flow R1 is divided into the multiply air-flow, and these air-flows are directed to corresponding a plurality of terminal chambers respectively.As a result, may weaken the first air-flow R1 effectively.In addition, the second air-flow R2 is divided into the multiply air-flow, and these air-flows are guided a plurality of terminal chambers to correspondence respectively.As a result, may weaken the second air-flow R2 effectively.

Should be noted in the discussion above that outlet chamber 62 can be called as main chamber.First chamber and second chamber can be called as sub-chamber, and they form by main chamber is cut apart.In addition, sub-chamber is divided into the central bore that (a) is positioned at approximate centre portion; And a plurality of terminal chambers that (b) are provided with along sidewall 61a.

Eddy current guide fins 82d, 82f, 82g, 82h comprise the first eddy current guide fins 82d, and it is set to the island in first chamber, also comprise the second eddy current guide fins 82f, 82g, 82h, and these fins are set to the island in second chamber.In above-mentioned structure, at least a portion among the first air-flow R1 has formed eddy current S1 in first chamber.May slacken the first air-flow R1 in first chamber thus effectively.Equally, at least a portion among the second air-flow R2 has formed eddy current S2 in second chamber.And, in second chamber, formed the multiply eddy current.May slacken the second air-flow R2 in second chamber thus effectively.

In addition, the first eddy current guide fins 82d is set between two terminal subregion fin 81a, the 81b.As a result, may weaken flowing of contra-flow exhaust gases in this terminal chamber effectively.In addition, the second eddy current guide fins 82f, 82g, 82h are set between two terminal subregion fin 81c, the 81d.As a result, may weaken contra-flow exhaust gases flowing in another terminal chamber effectively.

The check valve 75 of valve system 7 defines valve passage 77a, and this valve passage 77a allows auxiliary air to flow to outlet chamber 62.When leaf valve 77 is unlocked, just formed valve passage 77a.As a result, valve passage 77a is oriented on the direction of deflection leaf valve 77.Shown in the sectional view among Fig. 1, the free end of leaf valve 77 is positioned at the left side of outlet chamber 62.As a result, by the left side of leaf valve 77 formed valve passage 77a openings at outlet chamber 62.In addition, valve passage 77a is along extending to the direction of downside from the upside of outlet chamber 62, and the form with deflection of being orientated is from central inclined left side.A plurality of

fin

82f, 82g, 82h are positioned on the virtual line stretcher of valve passage 77a.In plan view shown in Figure 2, a plurality of

fin

82f, 82g, 82h extend on the L-R direction of outlet chamber.In other words, a plurality of

fin

82f, 82g, 82h are that virtual line stretcher along valve passage 77a forms.For example, the virtual line stretcher of valve passage 77a is the opening radially outward stretching, extension from leaf valve 77, thereby forms flaring passage.In this embodiment,, a plurality of

fin

82f, 82g, 82h form, so suppress the collision of the normal flow FF of auxiliary air and

fin

82f, 82g, 82h effectively because being virtual line stretcher along valve passage 77a.In other words, because being formed along the radial direction of second body 6, a plurality of

fin

82f, 82g, 82h extend, along the normal flow FF of the auxiliary air of the valve passage 77a that flows through, so suppress the collision of the normal flow FF of auxiliary air and

fin

82f, 82g, 82h effectively.As a result, under the prerequisite of the resistance of the normal flow that does not excessively increase auxiliary air, may slacken flowing of contra-flow exhaust gases effectively.

On the outer surface of container unit 61, be formed with a plurality of outside fin 68.These a plurality of outer fins 68 are plate shape, and extend on the direction vertical with section shown in Fig. 1 sectional view.These a plurality of outer fins 68 are set at from container unit 61 to steam outlet pipe in 63 the scope.A plurality of outer fins 68 are configured to be parallel to each other, and are spaced from each other.Each outer fin 68 all is set to be parallel to the cooling air flow that flows around auxiliary air control valve 4.Owing to adopted above-mentioned structure, may effectively the heat of contra-flow exhaust gases be dissipated to the outside of container unit 61 and steam outlet pipe 63.

In the above-described embodiment, may eliminate the heat of contra-flow exhaust gases effectively.In addition, may weaken flowing of contra-flow exhaust gases effectively.In addition, under the prerequisite of the resistance that does not excessively increase the auxiliary air normal flow, may weaken flowing of contra-flow exhaust gases effectively.In addition, utilize simple structure may reach above-mentioned advantage.As a result, the invention provides a kind of auxiliary air control valve, it avoids being subjected to the adverse effect of contra-flow exhaust gases.

(second mode of execution)

Plan view among Fig. 3 has been represented the inside according to the auxiliary air control valve of second embodiment of the invention, and this plan view is observed and obtained from 7 pairs second bodies 206 of valve system.In this embodiment, the shape of a plurality of fins 8 is different from the shape of fin in first mode of execution.

In this mode of execution, shape, position and the function of each

fin

281a, 281b, 281c, 282a, 282b, 282c, 282d, 282e, 282f correspond respectively to shape, position and the function of

fin

81a, 81b, 81c, 82a, 82b, 82c, 82d, 82e, 82f.In the present embodiment, be provided with

terminal subregion fin

281d, 281e, replace eddy current guide fins 82f, 82g in first mode of execution.In addition, be provided with eddy current guide fins 282g, replacement is provided with terminal subregion fin 81d.Because said structure may be realized the similar advantage that can reach with first mode of execution equally.

(other mode of execution)

Hereinbefore several mode of executions of the present invention are described.But the present invention is not limited to these above-mentioned mode of executions, thereby the present invention is applicable to various remodeling forms, as long as these remodeling do not depart from purport of the present invention.Structure in the above-mentioned mode of execution only is exemplary, thereby scope of the present invention is not limited to the scope of description that above-mentioned mode of execution is done.Scope of the present invention is limited by claim, thereby, all remodeling form and equivalents that protection scope of the present invention also comprises claim and contained.

For example, alternately, all a plurality of fins can be the fins that is connected.In addition, shell alternatively, all a plurality of fins also can be the fins that separates.Equally, the obstacle fin can be configured to contra-flow exhaust gases is divided into three strands or multiply air-flow.And alternately, a plurality of fins 8 can be formed bent plate.

Those skilled in the art can easily recognize other advantage and remodeling.Thereby on more wide in range aspect, the present invention is not limited to shown and detail, representational device and the exemplary example described in the literary composition.

Claims

1. auxiliary air control valve that is connected with vent systems (3), vent systems wherein allow waste gas from wherein flowing through, and wherein, described assist control control valve is to described vent systems feed auxiliary air, and described auxiliary air control valve comprises:

Passage forms member (5,6), and described passage forms member (5,6) and formed the passage of auxiliary air feed being given described vent systems through it; And

Valve system (7), it is set in the described passage, wherein:

Described passage forms member (5,6) and comprising:

Form in the container unit (61,61a, 61b), this container unit:

Outlet chamber (62), it is set between described valve system and the vent systems;

Outlet passageway (64), its have first opening (65) that is communicated with described outlet chamber,

And second opening (66) that is communicated with described vent systems; And

A plurality of fins (8), described a plurality of fin (8) projects into the described outlet chamber from described container unit, so that described a plurality of fin (8) collides the waste gas of adverse current, wherein, the waste gas of described adverse current through described first opening (65) along from of the direction reverse flow of described outlet passageway to outlet chamber, described a plurality of fin (8) is divided into a plurality of chambers with described outlet chamber, and described contra-flow exhaust gases has formed a plurality of eddy current in described a plurality of chambers.

2. auxiliary air control valve according to claim 1 is characterized in that,

Described a plurality of fin (8) comprises obstacle fin (82a, 82b, 282a, 282b), described obstacle fin (82a, 82b, 282a, 282b) is set on the virtual line stretcher of described outlet passageway, so that described obstacle fin and contra-flow exhaust gases are directly collided; And

Described obstacle fin is divided at least the first air-flow (R1) and second air-flow (R2) with contra-flow exhaust gases.

3. auxiliary air control valve according to claim 2 is characterized in that,

Described a plurality of fin (8) also comprises central subregion fin (82e, 282e), described central subregion fin (82e, 282e) has formed first chamber and second chamber in described outlet chamber, wherein, described first air-flow mainly is introduced in first chamber, and described second air-flow mainly is introduced in second chamber.

4. auxiliary air control valve according to claim 3 is characterized in that,

Described a plurality of fin (8) comprising:

The first eddy current guide fins (82d, 282d), it is set to the island in described first chamber, and the described first eddy current guide fins limits the annular cavity around it, and described chamber makes contra-flow exhaust gases form eddy current; And

The second eddy current guide fins (82f, 82g, 82h, 282f, 282g), it is set to the island in described second chamber, and the described second eddy current guide fins limits the annular cavity around it, and described chamber makes contra-flow exhaust gases form eddy current.

5. auxiliary air control valve according to claim 4 is characterized in that,

Described a plurality of fin (8) comprising:

The first terminal subregion fin (81a, 81b, 281a, 281b), it has formed a plurality of terminal chambers in described first chamber, the described first terminal subregion fin is divided into the multiply air-flow with described first air-flow, and described multiply air-flow is drawn towards each corresponding described a plurality of terminal chambers; And

The second terminal subregion fin (81c, 81d, 281c, 281d, 281e), it has formed a plurality of terminal chambers in second chamber, the described second terminal subregion fin is divided into the multiply air-flow with second air-flow, and described multiply air-flow is drawn towards each corresponding described terminal chamber.

6. according to the described auxiliary air control valve of one of claim 1 to 3, it is characterized in that,

Described a plurality of fin (8) comprises eddy current guide fins (82d, 82f, 82g, 82h, 282d, 282f, 282g), and it is set to the island in the described outlet chamber; And

Described eddy current guide fins limits the annular cavity around it, and described annular cavity makes contra-flow exhaust gases form eddy current.

7. auxiliary air control valve according to claim 1 is characterized in that,

Comprise a plurality of terminal subregion fins (81a, 81b, 81c, 81d, 281a, 281b, 281c, 281d, 281e) in described a plurality of fin (8), it forms a plurality of terminal chambers in described outlet chamber; And

Described a plurality of terminal subregion fin is divided into the multiply air-flow with contra-flow exhaust gases, and described multiply air-flow is distinguished drainage to described a plurality of terminal chambers.

8. auxiliary air control valve according to claim 1 is characterized in that,

Described container unit comprises:

The sidewall of tubulose (61a), its end near described valve system has opening; And

Diapire (61b), it is set at the other end of described sidewall;

Described container unit limits the described outlet passageway and first opening therein, makes contra-flow exhaust gases flow in the described outlet chamber along the internal surface of described diapire; And

Described a plurality of fin (8) comprising:

The fin that is connected (81) that all is connected with described sidewall and diapire, and the described fin that is connected (81) stretches out from described sidewall; And

The fin that separates (82) that only is connected but separates with described sidewall with described diapire.

9. auxiliary air control valve according to claim 8 is characterized in that,

Each fin in described a plurality of fin (8) all is a plate shape, and its short transverse along described sidewall stretches out from described diapire;

The height of each fin in described a plurality of fin (8) is all less than the height of described sidewall; And

Described outlet chamber comprises the chamber portion (62a) that is limited between described a plurality of fin (8) and the valve system (7), and described chamber portion (62a) extends along the opening of described sidewall.

10. auxiliary air control valve according to claim 1 is characterized in that,

Described valve system limits valve passage (77a), and it allows auxiliary air to flow in the described outlet chamber through this;

Described a plurality of fin (8) comprises the locational fin (82h, 82g, 82h) of the virtual line stretcher that is positioned at described valve passage; And

Described fin (82h, 82g, 82h) is that the virtual line stretcher along described valve passage forms.

11. auxiliary air control valve according to claim 1 is characterized in that,

Described container unit has a plurality of outer fins (68), and described a plurality of outer fins (68) are formed on the outer surface of described container unit.