CN204552987U - Waste gas circulating valve - Google Patents
Waste gas circulating valve Download PDFInfo
- Publication number
- CN204552987U CN204552987U CN201290001266.2U CN201290001266U CN204552987U CN 204552987 U CN204552987 U CN 204552987U CN 201290001266 U CN201290001266 U CN 201290001266U CN 204552987 U CN204552987 U CN 204552987U
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- Prior art keywords
- valve
- valve seat
- waste gas
- shaped member
- inclination
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
- F02D9/1045—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing for sealing of the flow in closed flap position, e.g. the housing forming a valve seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lift Valve (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model provides waste gas circulating valve, form the stepped part of the proximate annular be made up of large-diameter portion (12) and minor diameter part (11) at the exhaust passageway inner peripheral surface of shell (10), large-diameter portion (12) is fixed in ring-shaped member (20) press-in.(the first valve seat (51) is made up of the inner side edge edge of ring-shaped member (20), and (the second valve seat (52) is made up of the edge part of step surface (13) opposite side in the side of valve seat (50).When being pressed into ring-shaped member (20), measure valve seat leakage, become approximate minimum position in leakage rate and terminate press-in, thus leave gap (S) between the end face (21) and step surface (13) of this ring-shaped member (20).
Description
Technical field
The utility model relates to the shape of the valve seat of waste gas circulating valve (EGR valve).
Background technique
The waste gas circulating valve of the flow of adjustment cycle gas, be made up of valve exhaust passageway being carried out to opening and closing and the valve-supporting axle making this valve carry out spinning movement, valve-supporting axle can be supported on bearing portion rotatably, and this bearing portion is arranged at the shell forming exhaust passageway.On the other hand, valve seat is arranged on the exhaust passageway of shell, by abutting with valve thus closing exhaust passageway.
Particularly in waste gas circulating valve, it is very important that the leakage (hereinafter referred to as valve seat leakage) of the cycle gas amount between the valve-seat under the full-shut position abut valve with valve seat is restricted to small limit.
In patent documentation 1, such as propose there is the waste gas circulating valve that inhibit valve seat leakage.In this motion, form by the first sleeve and these two parts of the second sleeve the parts being equivalent to valve seat being referred to as sleeve, and by this parts assembly in the inner peripheral portion of exhaust passageway.Now, first sleeve and the second sleeve are staggered axle center diametrically mutually, the front-end face of above-mentioned two sleeves is abutted mutually, form step end surface in the inner side of two sleeves thus, and the edge part extended by the circumferencial direction along this stepped part end face forms the first seat portion.In addition, the outer circumferential face of valve is formed as plane of inclination or cross section arc-shaped, and the outer circumferential face of this valve is formed as the second seat portion.And be configured to: contacted by the first seat portion of the second seat portion with sleeve side that make valve side, confining gas path thus.
Patent documentation 1: Japanese Unexamined Patent Publication 2004-263723 publication
Above-mentioned patent documentation 1 is the surface pressure by improving two seat portion contacted with each other, and reducing the structure of valve seat leakage, therefore in order to obtain higher surface pressure, needing the deviation of each parts suppressing formation two seat portion accurately.In addition, particularly when have in 1 eccentric valve adopt eccentric configuration, eccentric deviation also has an impact, and therefore maintains higher surface pressure more difficult.
The utility model completes to solve problem as described above, and object is to provide a kind of deviation suppressing assembly precision, and reduces the waste gas circulating valve of valve seat leakage.
Model utility content
Waste gas circulating valve of the present utility model, possesses: shell, and it has exhaust passageway, the stepped part of proximate annular, it is made up of large-diameter portion and minor diameter part at the inner peripheral surface place of described exhaust passageway, and the mode that this large-diameter portion and minor diameter part stagger diametrically mutually with central shaft is formed, ring-shaped member, described large-diameter portion is fixed in its press-in, the valve of circular plate shape, it is arranged in described exhaust passageway, and axle, it makes described valve carry out spinning movement, the edge part of described stepped part and the inner side edge edge of described ring-shaped member, be positioned at the position that central shaft mutually staggers in described radial direction, the inner side edge edge of the described ring-shaped member more outstanding to the inside than the edge part of described stepped part forms the first valve seat, the edge part of the described stepped part more outstanding to the inside than the inner side edge edge of described ring-shaped member forms the second valve seat, the peripheral part of described valve contacts with described first valve seat and described second valve seat, carry out closed described exhaust passageway, the described ring-shaped member forming described first valve seat has gap in the axial direction and between step surface, between the described large-diameter portion that this step surface is formed in the described stepped part forming described second valve seat and described minor diameter part.
In addition, the manufacture method of waste gas circulating valve of the present utility model, comprises the following steps: number of assembling steps, and described exhaust passageway, described large-diameter portion and described minor diameter part are formed at described shell, arranges described axle and described valve near described stepped part; Measure valve seat leakage step, under the state having pressure to effect in described exhaust passageway, described ring-shaped member is pressed into vertically from the end side of described large-diameter portion and makes it close to described valve, while to measuring from the leakage rate of leaking between described valve and described first valve seat and described second valve seat; And positioning step, when leakage rate measured in described measurement valve seat leakage step transfers increase to from minimizing, terminate the press-in to described ring-shaped member, and arrange gap between step surface and described ring-shaped member, this step surface is formed between described large-diameter portion and described minor diameter part.
According to the utility model, when large-diameter portion is fixed in ring-shaped member press-in, does not make this ring-shaped member touch and terminate in step surface but leave gap, thus can pushed position be adjusted, suppress the deviation of assembly precision.Therefore, it is possible to provide the waste gas circulating valve reducing valve seat leakage.
Accompanying drawing explanation
Fig. 1 is the sectional block diagram of the structure of the waste gas circulating valve representing mode of execution 1 of the present utility model, is to represent the crack state of valve.
Fig. 2 is the sectional block diagram of the structure of the waste gas circulating valve representing mode of execution 1, is to represent valve closed condition.
Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) represent the structure of the waste gas circulating valve of mode of execution 1, Fig. 3 (a) is sectional view, Fig. 3 (b) is the enlarged view of a-quadrant, and Fig. 3 (c) is the enlarged view in B region.
Fig. 4 is the stereoscopic figure of the shell of the waste gas circulating valve representing mode of execution 1.
Fig. 5 is the plan view of the shell of the waste gas circulating valve representing mode of execution 1.
Fig. 6 (a), Fig. 6 (b) represent the valve of the waste gas circulating valve of mode of execution 1, and Fig. 6 (a) is plan view, and Fig. 6 (b) is sectional view.
Fig. 7 (a), Fig. 7 (b) illustrate the figure measuring valve seat leakage step.
Fig. 8 (a), Fig. 8 (b), Fig. 8 (c) represent the structure of the waste gas circulating valve of mode of execution 2 of the present utility model, Fig. 8 (a) is sectional view, Fig. 8 (b) is the enlarged view of a-quadrant, and Fig. 8 (c) is the enlarged view in B region.
Fig. 9 (a), Fig. 9 (b), Fig. 9 (c) represent the variation of the waste gas circulating valve of mode of execution 2, Fig. 9 (a) is sectional view, Fig. 9 (b) is the enlarged view of a-quadrant, and Fig. 9 (c) is the enlarged view in B region.
Figure 10 is the plan view of the shell representing the waste gas circulating valve shown in Fig. 9 (a).
Figure 11 (a), Figure 11 (b), Figure 11 (c) represent the structure of the waste gas circulating valve of mode of execution 3 of the present utility model, Figure 11 (a) is sectional view, Figure 11 (b) is the enlarged view of a-quadrant, and Figure 11 (c) is the enlarged view in B region.
Figure 12 (a), Figure 12 (b), Figure 12 (c) represent the variation of the waste gas circulating valve of mode of execution 3, Figure 12 (a) is sectional view, Figure 12 (b) is the enlarged view of a-quadrant, and Figure 12 (c) is the enlarged view in B region.
Embodiment
Below, in order to illustrate in greater detail the utility model, be described for implementing mode of the present utility model according to accompanying drawing.
Mode of execution 1
Fig. 1 is the sectional block diagram of the crack state of valve of the waste gas circulating valve representing present embodiment 1.Fig. 2 is the sectional block diagram of valve closed condition, and Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) are the sectional views of valve closed condition.This waste gas circulating valve is the butterfly valve of the waste gas circulation path being arranged at vehicle, is configured to comprise: shell 10, and it has the minor diameter part 11 becoming exhaust passageway; Large-diameter portion 12, its diameter is larger than minor diameter part 11, forms the stepped part of proximate annular between this large-diameter portion 12 and minor diameter part 11; Ring-shaped member 20, large-diameter portion 12 is fixed in its press-in; Axle 30, its through exhaust passageway; The valve 40 of circular plate shape, it is fixed on axle 30.Ring-shaped member 20 is the parts separated with shell 10, but material can identical, also can be different.
Below, for convenience of explanation, direction parallel for rotary middle spindle O1 with axle 30 is set to X-axis, by two axles orthogonal with rotary middle spindle O1, the direction parallel with the surface of the valve 40 of closed condition be set to Y-axis, and the waste gas circulating direction of exhaust passageway is set to Z axis.
Fig. 4 is the stereoscopic figure of the structure representing shell 10.Fig. 5 is the plan view of shell 10, represents that the ring-shaped member 20 of the state of this shell 10 is fixed in press-in with double dot dash line.Fig. 6 (a) is the plan view of the structure representing valve 40, and Fig. 6 (b) is sectional view.The valve 40 of adjustment exhausted air quantity is fixed on axle 30, and this axle 30 supports as rotating by bearing portion 14, and this bearing portion 14 is arranged at shell 10.Not shown drive portion makes axle 30 carry out spinning movement, makes valve 40 rotate around the rotary middle spindle O1 of axle 30 thus, thus is formed between valve seat 50 described later and valve 40 and open road, adjusts exhausted air quantity.
In addition, in present embodiment 1, as shown in Fig. 6 (b), the rotary middle spindle O1 of axle 30 is fixed on as upper/lower positions, namely in the Z-axis direction relative to the position that the central shaft O2 of valve 40 staggers, thus forms the waste gas circulating valve of 1 eccentric configuration.In addition, as described later, become and the outer circumferential face 41 of valve 40 is set to plane of inclination 41a, 41b, make the outer circumferential face 41 of valve 40 and the structure of valve seat 50 linear contact lay.
In addition, in illustrated example, directly valve 40 is not installed on axle 30, but between axle 30 and valve 40 sandwiched plate 31.Thereby, it is possible to regulating valve 40 and plate 31, plate 31 and the area of contact of axle 30, improve the constant intensity of valve 40 and axle 30.In addition, by changing the thickness of plate 31,1 offset of Z-direction can also be adjusted.
As shown in Figure 5, the central shaft O3 of large-diameter portion 12, eccentric in the Y-axis direction relative to rotary middle spindle O1.In addition, the mode that large-diameter portion 12 and minor diameter part 11 stagger diametrically mutually with central shaft is formed.Therefore, the step surface 13 be present between large-diameter portion 12 and minor diameter part 11, in the Y direction orthogonal with rotary middle spindle O1 and on drawing, right side is formed with the narrow position 13a of width, is formed with the wide position 13b of width at drawing upper left side.Narrow position 13a and wide position 13b, connects smoothly in the mode that width increases gradually.
In addition, as shown in Figure 5, the central shaft O4 of ring-shaped member 20 is slightly eccentric in the Y-axis direction relative to rotary middle spindle O1.In addition, the width of the end face 21 of ring-shaped member 20 is formed as impartial.Therefore, if be pressed into by ring-shaped member 20 fixing from the open end side of large-diameter portion 12 to Z-direction, then the edge part of step surface 13 and the inner side edge edge of ring-shaped member 20, become the position relationship mutually staggered diametrically.Therefore, exist in the inner side edge edge of the end face 21 of ring-shaped member 20: inner side edge edge 21a, the edge part 13a-1 of its position 13a narrower than the width of step surface 13 gives prominence to the inside; The edge part 13b-1 of inner side edge edge 21b, its position 13b wider than the width of step surface 13 shrinks back laterally.
The inner side edge edge 21a of the ring-shaped member 20 given prominence to the inside by the edge part 13a-1 than step surface 13, is set to the first valve seat 51.On the other hand, by the edge part 13b-1 of the step surface 13 that the inner side edge edge 21b than ring-shaped member 20 gives prominence to the inside, the second valve seat 52 is set to.By above-mentioned first valve seat 51 and the second valve seat 52, form the valve seat 50 of proximate annular at the inner peripheral surface of exhaust passageway.
In addition, switch two place's switching parts 53,54 of the first valve seat 51 and the second valve seat 52, be positioned to tilt with respect to the Y-axis line at the center of ring-shaped member 20 ± the position of α degree.In the scope of ± α degree, the internal diameter forming the minor diameter part 11 (i.e. the edge part 13b-1 of step surface 13) of the second valve seat 52 is formed as: do not hinder the diameter of the spinning movement of valve 40, can form the diameter of valve seat surface relative to valve 40 together with the first valve seat 51, is formed as the diameter forming ladder difference between itself and the large-diameter portion 12 of press-in stationary ring parts 20 in addition.
Valve seat 50 has the first valve seat 51 and these two valve seats of the second valve seat 52, therefore in order to make the outer circumferential face 41 of valve 40 relative to each valve seat linear contact lay, needs the true dip direction switching outer circumferential face 41.As shown in Fig. 6 (a), Fig. 6 (b), in the outer circumferential face 41 of valve 40, be equivalent to two place's switching parts 53,54 ± scope of α degree in, form plane of inclination 41b angle of inclination being set to β degree, in remaining scope, form plane of inclination 41a angle of inclination being set to-β degree.In the position of α degree and-α degree, respectively angle of inclination is set to 0 degree.Near this α degree, with angle of inclination reverse smoothly-β degree, 0 degree, the mode of β degree forms inclination switching part 42.Similarly, near-α degree, with angle of inclination reverse smoothly β degree, 0 degree, the mode of-β degree forms inclination switching part 43.
In addition now, by maintaining-β degree in scope large as far as possible relative to circumference on outer circumferential face 41, the scope of plane of inclination 41a and the first valve seat 51 linear contact lay increases thus, can realize large-scale sealing.Similarly, in the scope large as far as possible relative to circumference, maintain β degree, the scope of plane of inclination 41b and the second valve seat 52 linear contact lay increases thus, can realize large-scale sealing.In other words, two place's inclination switching parts 42,43 scope in the circumferential is preferably reduced as much as possible.At least, the scope being preferably plane of inclination 41a is in the circumferential greater than the scope of inclination switching part 42 (or inclination switching part 43).Similarly, the scope being preferably plane of inclination 41b is in the circumferential greater than the scope of inclination switching part 42 (or inclination switching part 43).
In addition, by inclination switching part 42,43 and switching part 53,54 are arranged on the position of staggering from the rotary middle spindle O1 of axle 30, can not rotate interferingly with valve seat 50 near the rotary middle spindle O1 of valve 40 thus, thus linear sealing can be realized at the complete cycle of valve 40.
In addition, in illustrated example, formed and the edge part of the first valve seat 51 contacted with plane of inclination 41a, 41b of valve 40 and the second valve seat 52 is set to angular shape to carry out the structure of linear sealing, but also the edge part of the first valve seat 51 and the second valve seat 52 can be set to cross section arc-shaped to carry out linear sealing, the edge part of the first valve seat 51 and the second valve seat 52 can also be set to face and carry out face sealing.
In addition, the tilted shape of the valve 40 that Fig. 6 (a), Fig. 6 (b) represent is examples, as long as according to the condition such as offset, the position of switching part 53,54, the thickness of valve 40 of the rotary middle spindle O1 of axle 30, the angle of inclination, slant range, inclination switching position etc. of valve design 40 aptly.
In addition, waste gas circulating valve can not be 1 eccentric configuration, but can be overlapped in the mode on same axle with the central shaft O2 of the rotary middle spindle O1 of axle 30 and valve 40, axle 30 and valve 40 is fixed.In addition, can not be make plane of inclination 41a, 41b of valve 40 and the structure of valve seat 50 linear contact lay, but can be formed and make the peripheral part of valve 40 (the table back side) and valve seat 50 structures contacted.
Next, the manufacturing sequence of waste gas circulating valve is described.
1. number of assembling steps
First, minor diameter part 11, large-diameter portion 12 and the bearing portion 14 for inserting for axle 30 is formed at shell 10.Then, axle 30 is inserted through this bearing portion 14, and under the state being folded with plate 31, by temporary fixed to axle 30 and valve 40.Temporary fixedly to refer to: valve 40 can not come off relative to axle 30, but at least leave relative to plate 31 can around the degree of the central shaft O2 activity of valve 40 and can be movable along the in-plane of plate 31 degree lax.Such as, when valve 40 screw is fixed on axle 30, that screw-driving is extremely not last, but carry out temporary fixed.Then, under the state of the positioning step stated in the completed, final fastening screw trip bolt and complete product.
In addition, also plate 31 can be omitted.
2. measure valve seat leakage step
Fig. 7 (a) illustrates the figure measuring valve seat leakage step.
After the assembly, at the end side configuration ring-shaped member 20 of large-diameter portion 12, and valve 40 is clipped in the middle, ring-shaped member 20 is pressed into from the direction contrary with axle 30 in large-diameter portion 12.In process of press in, to actuating pressure in exhaust passageway, and measure from the leakage rate of leaking between valve 40 and valve seat 50 (such as negative pressure).
3. positioning step
Fig. 7 (b) is the plotted curve representing the intrusion of ring-shaped member 20 and the relation of leakage rate.As shown in Fig. 7 (a), intrusion is the distance be pressed into along Z-direction relative to large-diameter portion 12 by ring-shaped member 20.In addition, the permitted value to the leakage rate that waste gas circulating valve presets is represented with dot and dash line in the graph.
Along with intrusion from be pressed into ring-shaped member 20 moment increase, valve seat 50 is closed by valve 40 gradually, and therefore leakage rate reduces gradually.If be pressed into ring-shaped member 20 gradually further, then leakage rate becomes minimum value, if exceed this minimum value, then the position of formation first valve seat 51 of ring-shaped member 20 presses valve 40, gap is produced thus between the position and valve 40 of formation second valve seat 52 of step surface 13, its result, leakage rate starts to increase.
Therefore, detecting that leakage rate is below permitted value, and when transferring the minimal point of increase to from minimizing, terminating the press-in of ring-shaped member 20.Thereby, it is possible to ring-shaped member 20 is encased in valve seat leakage be suppressed to minimal position.In addition, not ring-shaped member 20 is touched terminate in step surface 13, but based on leakage rate measurement result, best position is determined to each waste gas circulating valve, between step surface 13 and the end face 21 of ring-shaped member 20, therefore produce gap S (as Suo Shi Fig. 3 (b), Fig. 3 (c)).In addition, the size of this gap S is different according to the size deviation of each parts, the deviation of setting position etc.
In addition, in illustrated example, be make the thickness of the Z-direction of the Thickness Ratio large-diameter portion 12 of the Z-direction of ring-shaped member 20 little, but be not limited to this.
Like this, when ring-shaped member 20 is pressed into, determine the first valve seat 51 and the second valve seat 52 in scope large as far as possible relative to the position that valve 40 contacts, therefore, it is possible to the size deviation of each parts and the deviation of assembling such as absorption axes 30, valve 40, thus the deviation of assembly precision can be suppressed.In addition, when for 1 eccentric configuration, the deviation of each parts can not only be absorbed, and the deviation of offset can be absorbed.Its result, can reduce valve seat leakage as far as possible.
Butterfly waste gas circulating valve, the aperture of exhaust gas flow and valve 40 increases pro rata under normal circumstances, but till full-shut position aperture (small aperture) to a certain degree, exhaust gas flow increases sharp, carries out tiny flow quantity adjustment very difficult.For this problem, in present embodiment 1, by the gap S between step surface 13 and the end face 21 of ring-shaped member 20, be set to (minimum aperture) distance s from the second valve seat 52 to outer circumferential face 41 (as Suo Shi Fig. 3 (b)) when opening valve 40 than drive portion with minimum resolution large.So, with the small aperture comprising minimum aperture to open valve 40 time, the waste gas flowed in valve 40 gap with valve seat 50 produces turbulent and is difficult to flow.Therefore, it is possible to flow when suppressing small aperture increases.
Thus, according to mode of execution 1, waste gas circulating valve possesses: shell 10, and it has exhaust passageway, the stepped part of proximate annular, it is made up of large-diameter portion 12 and minor diameter part 11 at the inner peripheral surface place of exhaust passageway, and the mode that this large-diameter portion 12 and minor diameter part 11 stagger diametrically mutually with central shaft is formed, ring-shaped member 20, large-diameter portion 12 is fixed in its press-in, the valve 40 of circular plate shape, it is formed with plane of inclination 41a, 41b at outer circumferential face 41, and axle 30, it makes the valve 40 be arranged in exhaust passageway carry out spinning movement, the edge part of stepped part and the inner side edge edge of ring-shaped member 20, be located at the position that radial upper central shaft staggers mutually, than the inner side edge edge 21a of the ring-shaped member 20 that the edge part 13a of stepped part gives prominence to the inside, form the first valve seat 51, than the edge part 13b of the stepped part that the inner side edge edge 21b of ring-shaped member 20 gives prominence to the inside, form the second valve seat 52, the outer circumferential face 41 of valve 40 and the first valve seat 51 and the second valve seat 52 linear contact lay, carry out closed exhaust passageway, ring-shaped member 20 is configured in the axial direction and has gap S between step surface 13, this step surface 13 is formed between large-diameter portion 12 and minor diameter part 11.When large-diameter portion 12 is fixed in ring-shaped member 20 press-in, does not make ring-shaped member 20 touch and terminate in step surface 13, but leave gap S, can pushed position be adjusted thus, suppress the deviation of assembly precision.Therefore, it is possible to provide the waste gas circulating valve reducing valve seat leakage.
In addition, according to mode of execution 1, the rotary middle spindle O1 of axle 30 is configured to the central shaft O2 be fixed on relative to valve 40 and the position of staggering on waste gas circulating direction (Z-direction).Even if in the waste gas circulating valve of above-mentioned 1 eccentric configuration, the deviation of offset also can be absorbed in the S of gap.Therefore, it is possible to provide the waste gas circulating valve of 1 eccentric configuration reducing valve seat leakage.
In addition, according to mode of execution 1, valve 40 is configured to be formed with plane of inclination 41a, 41b at outer circumferential face 41, thus makes plane of inclination 41a, 41b and the first valve seat 51 and the second valve seat 52 linear contact lay.In addition, outer circumferential face 41 is configured to be had: plane of inclination 41a, its with angle of inclination-β tilt and with the first valve seat 51 linear contact lay; Plane of inclination 41b, its with inclination angle beta tilt and with the second valve seat 52 linear contact lay; And inclination diverter surface 42,43, they switch smoothly between angle of inclination-β and inclination angle beta, and the scope of plane of inclination 41a, 41b is greater than the scope of inclination switching part 42,43 respectively in the circumferential.Therefore, it is possible to provide the roughly complete cycle that can make valve 40 to contact with valve seat 50, thus reduce further the waste gas circulating valve of valve seat leakage.
In addition, according to mode of execution 1, gap S is configured to: when the drive portion that comparison live axle 30 carries out rotary actuation opens valve 40 with minimum resolution, large from the distance s of valve 40 to the second valve seat 52.Therefore, near valve 40 and valve seat 50, produce turbulent flow, thus flow when can suppress small aperture increases.
Mode of execution 2
Fig. 8 (a) is the sectional view of the structure of the waste gas circulating valve representing mode of execution 2 of the present utility model, and Fig. 8 (b) is the enlarged view of a-quadrant, and Fig. 8 (c) is the enlarged view in B region.In Fig. 8 (a), Fig. 8 (b), Fig. 8 (c), identical reference character is marked to the part same or equivalent with Fig. 1 ~ Fig. 7 (a), Fig. 7 (b), and omits the description.
In present embodiment 2, in order to prevent the corrosion of the exposed surface 15 of the shell 10 being exposed to gap S, and in the gap S between the end face 21 and step surface 13 of ring-shaped member 20 sandwiched elastic member 60.
But, when valve 40 is opened with small aperture, in order to easily produce turbulent flow in the offgas, and elastic member 60 is not arranged on the position blocking gap S completely, but is arranged on the position of the inboard (exposed surface 15 side) of local stoppages gap S.In illustrated example, form groove 22 at the outside diameter of end face 21, thus elastic member 60 is set at this groove 22.
Thereby, it is possible to flow when suppressing small aperture increases, and the corrosion of shell 10 can be prevented.
In addition, in order to improve corrosion resistance and durability, also can be configured to use the miscellaneous parts such as stainless steel (SUS), covering the inner peripheral surface of exhaust passageway.Fig. 9 (a) and Figure 10 represents this configuration example.In addition, in Fig. 9 (a), Fig. 9 (b), Fig. 9 (c) and Figure 10, identical reference character is marked to the part same or equivalent with Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) and Fig. 5, and omits the description.
In the configuration example of Fig. 9 (a) and Figure 10; by the cartridge 70 embedded shaping (die casting, casting etc.) that is made up of SUS material etc. in the inner peripheral surface of the exhaust passageway of shell 10; form minor diameter part 11, thus cover the inner peripheral surface of exhaust passageway and protect in the mode of isolating with waste gas.In addition, ring-shaped member 20 also can be made up of SUS material etc.Cartridge 70 is formed as thickness equalization, takes shape in exhaust passageway inner peripheral surface if embedded, then the structure that the central shaft O3 of cartridge 70 is eccentric in the Y-axis direction relative to the rotary middle spindle O1 of the axle 30 and central shaft O4 of ring-shaped member 20.Therefore, have at the step surface 13 be made up of the end face of this cartridge 70: the edge part 13b-1 that the edge part 13a-1 shunk back laterally than the inner side edge edge 21a of the ring-shaped member 20 and inner side edge edge 21b than ring-shaped member 20 gives prominence to the inside.And, than the edge part 13b-1 that the inner side edge edge 21b of ring-shaped member 20 gives prominence to the inside, form the second valve seat 52.
In addition, also elastic member 60 can be omitted.
Thus, according to mode of execution 2, waste gas circulating valve is configured to possess elastic member 60, and this elastic member 60 is arranged on the gap S between the end face 21 of step surface 13 and ring-shaped member 20, and covers the exposed surface 15 exposed to gap S.Therefore, it is possible to improve the corrosion resistance of shell 10.
In addition, according to mode of execution 2, waste gas circulating valve possesses cartridge 70, and this cartridge 70 is configured at the inner peripheral surface of exhaust passageway, and forms minor diameter part 11, and the step surface 13 of the stepped part of proximate annular, is made up of the end face of cartridge 70.Therefore, it is possible to improve corrosion resistance and the durability of shell 10.
Mode of execution 3
Figure 11 (a) is the sectional view of the structure of the waste gas circulating valve representing mode of execution 3 of the present utility model, and Figure 11 (b) is the enlarged view of a-quadrant, and Figure 11 (c) is the enlarged view in B region.In Figure 11 (a), Figure 11 (b), Figure 11 (c), identical reference character is marked to the part same or equivalent with Fig. 3 (a), Fig. 3 (b), Fig. 3 (c), and omits the description.
In present embodiment 3, use the miscellaneous parts such as SUS material, cover large-diameter portion 12 and step surface 13, thus form the covering part (coating member) 80 of installing ring-shaped member 20.This covering part 80 is fixed in ring-shaped member 20 press-in, can prevents shell 10 from exposing from gap S thus, thus the corrosion resistance of shell 10 can be improved.In addition, covering part 80 is materials that corrosion resistance and durability are high, therefore, it is possible to improve the confining force of ring-shaped member 20, thus can suppress the dislocation of valve seat 50.
In addition, in order to improve corrosion resistance and durability, except large-diameter portion 12 and step surface 13, minor diameter part 11 also can be configured to be covered by miscellaneous parts such as SUS materials.Figure 12 (a), Figure 12 (b), Figure 12 (c) represent this configuration example.
In the configuration example of Figure 12 (a), Figure 12 (b), Figure 12 (c), in the inner peripheral surface whole installation covering part (coating member) 81 of exhaust passageway.Thereby, it is possible to improve the corrosion resistance of shell 10.
As mentioned above, according to mode of execution 3, as shown in Figure 11 (a), Figure 11 (b), Figure 11 (c), waste gas circulating valve possesses covering part 80, this covering part 80 covers the step surface 13 of the stepped part of large-diameter portion 12 and proximate annular, and ring-shaped member 20 is configured to be pressed into the large-diameter portion 12 being fixed on coating cap 80 and covering.Therefore, it is possible to improve the corrosion resistance of shell 10 and the confining force of ring-shaped member 20.
In addition, according to mode of execution 3, as shown in Figure 12 (a), Figure 12 (b), Figure 12 (c), waste gas circulating valve possesses covering part 81, this covering part 81 covers the step surface 13 of the stepped part of minor diameter part 11, large-diameter portion 12 and proximate annular, and ring-shaped member 20 is configured to be pressed into the large-diameter portion 12 being fixed on coating cap 81 and covering.Therefore, it is possible to improve the corrosion resistance of shell 10 further.
In addition, the application's model utility can combine freely each mode of execution or is out of shape the arbitrary constituting component of each mode of execution or omits any constituting component in each mode of execution in scope of the present utility model.
Industrial utilizability
As mentioned above, the waste gas circulating valve involved by the utility model, at the position press-in stationary ring parts 20 that can reduce valve seat leakage of large-diameter portion 12 as far as possible, is therefore applicable to the waste gas circulating valve etc. controlled the cycle gas amount of high pressure.
Description of reference numerals: 10 ... shell; 11 ... minor diameter part (exhaust passageway); 12 ... large-diameter portion; 13 ... step surface; 14 ... bearing portion; 15 ... exposed surface; 20 ... ring-shaped member; 21 ... end face; 22 ... groove; 30 ... axle; 31 ... plate; 40 ... valve; 41 ... outer circumferential face; 42,43 ... inclination switching part; 50 ... valve seat; 51 ... first valve seat; 52 ... second valve seat; 53,54 ... switching part; 60 ... elastic member; 70 ... cartridge; 80,81 ... covering part (coating member).
Claims (9)
1. a waste gas circulating valve, is characterized in that, possesses:
Shell, it has exhaust passageway;
The stepped part of proximate annular, it is made up of large-diameter portion and minor diameter part at the inner peripheral surface place of described exhaust passageway, and the mode that this large-diameter portion and minor diameter part stagger diametrically mutually with central shaft is formed;
Ring-shaped member, described large-diameter portion is fixed in its press-in;
The valve of circular plate shape, it is arranged in described exhaust passageway; And
Axle, it makes described valve carry out spinning movement,
The edge part of described stepped part and the inner side edge edge of described ring-shaped member, be positioned at the position that central shaft mutually staggers in described radial direction, the inner side edge edge of the described ring-shaped member more outstanding to the inside than the edge part of described stepped part forms the first valve seat, the edge part of the described stepped part more outstanding to the inside than the inner side edge edge of described ring-shaped member forms the second valve seat, the peripheral part of described valve contacts with described first valve seat and described second valve seat, carry out closed described exhaust passageway
The described ring-shaped member forming described first valve seat has gap in the axial direction and between step surface, between the described large-diameter portion that this step surface is formed in the described stepped part forming described second valve seat and described minor diameter part.
2. waste gas circulating valve according to claim 1, is characterized in that,
The rotary middle spindle of described axle is fixed on as upper/lower positions, namely on waste gas circulating direction relative to the position that the central shaft of described valve staggers.
3. waste gas circulating valve according to claim 1, is characterized in that,
Described valve is formed with plane of inclination at outer circumferential face, this plane of inclination and described first valve seat and described second valve seat linear contact lay.
4. waste gas circulating valve according to claim 1, is characterized in that,
Described gap is greater than following distance, when the drive portion namely described axle being carried out to rotary actuation opens described valve with minimum resolution, from described valve to the distance of described second valve seat.
5. waste gas circulating valve according to claim 1, is characterized in that,
Possess elastic member, this elastic member is arranged on the described gap between described ring-shaped member and described step surface, covers the described exhaust passageway inner peripheral surface exposed to described gap.
6. waste gas circulating valve according to claim 1, is characterized in that,
Possess cartridge, this cartridge is configured at described exhaust passageway inner peripheral surface, forms described minor diameter part,
Described step surface is the end face of described cartridge.
7. waste gas circulating valve according to claim 3, is characterized in that,
The outer circumferential face of described valve has: the first plane of inclination, and it is with the first inclined at inclination angles, and with described first valve seat linear contact lay; Second plane of inclination, it is with the second inclined at inclination angles, and with described second valve seat linear contact lay; And inclination diverter surface, it switches smoothly between described first angle of inclination and described second angle of inclination, and the scope of described first plane of inclination and described second plane of inclination is greater than the scope of described inclination diverter surface respectively in the circumferential.
8. waste gas circulating valve according to claim 1, is characterized in that,
Possess coating member, this coating member covers described large-diameter portion and described step surface,
The described large-diameter portion covered by described coating member is fixed in described ring-shaped member press-in.
9. waste gas circulating valve according to claim 1, is characterized in that,
Possess coating member, this coating member covers described minor diameter part, described large-diameter portion and described step surface,
The described large-diameter portion covered by described coating member is fixed in described ring-shaped member press-in.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/003956 WO2013190589A1 (en) | 2012-06-18 | 2012-06-18 | Exhaust gas circulation valve and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204552987U true CN204552987U (en) | 2015-08-12 |
Family
ID=49768223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201290001266.2U Expired - Fee Related CN204552987U (en) | 2012-06-18 | 2012-06-18 | Waste gas circulating valve |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5925309B2 (en) |
| CN (1) | CN204552987U (en) |
| WO (1) | WO2013190589A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441885A (en) * | 2019-01-17 | 2020-07-24 | 爱三工业株式会社 | EGR valve |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6183553B2 (en) | 2014-06-05 | 2017-08-23 | 株式会社村田製作所 | Transmission line member |
| FR3025015B1 (en) | 2014-08-25 | 2016-09-30 | Valeo Systemes De Controle Moteur | MOTOR CONTROL VALVE IN A MOTOR VEHICLE |
| JP6698419B2 (en) * | 2016-05-06 | 2020-05-27 | 愛三工業株式会社 | Exhaust gas recirculation valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3726815B2 (en) * | 2003-02-13 | 2005-12-14 | 大豊工業株式会社 | Flow control valve |
| JP2007032618A (en) * | 2005-07-22 | 2007-02-08 | Taiho Kogyo Co Ltd | Valve assembly, valve position learning method, and valve position learning program |
| JP5301209B2 (en) * | 2008-06-27 | 2013-09-25 | 大豊工業株式会社 | Flow control valve and manufacturing method thereof |
| WO2011004428A1 (en) * | 2009-07-07 | 2011-01-13 | 三菱電機株式会社 | Exhaust gas recirculation valve |
-
2012
- 2012-06-18 WO PCT/JP2012/003956 patent/WO2013190589A1/en active Application Filing
- 2012-06-18 JP JP2014520806A patent/JP5925309B2/en not_active Expired - Fee Related
- 2012-06-18 CN CN201290001266.2U patent/CN204552987U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441885A (en) * | 2019-01-17 | 2020-07-24 | 爱三工业株式会社 | EGR valve |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013190589A1 (en) | 2013-12-27 |
| JP5925309B2 (en) | 2016-05-25 |
| JPWO2013190589A1 (en) | 2016-02-08 |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20200618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |