CN101981359A - High-pressure seal - Google Patents
High-pressure seal Download PDFInfo
- Publication number
- CN101981359A CN101981359A CN2009801104698A CN200980110469A CN101981359A CN 101981359 A CN101981359 A CN 101981359A CN 2009801104698 A CN2009801104698 A CN 2009801104698A CN 200980110469 A CN200980110469 A CN 200980110469A CN 101981359 A CN101981359 A CN 101981359A
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- China
- Prior art keywords
- high pressure
- pressure seal
- tooth
- profile
- sealing bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 105
- 239000000446 fuel Substances 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 239000011159 matrix material Substances 0.000 claims description 48
- 238000009413 insulation Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 238000010292 electrical insulation Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract 3
- 238000007906 compression Methods 0.000 abstract 3
- 239000004020 conductor Substances 0.000 description 7
- 239000004809 Teflon Substances 0.000 description 6
- 229920006362 Teflon® Polymers 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- 230000014509 gene expression Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000156 glass melt Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
- F16L55/1133—Plugs fixed by means of balls
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a high-pressure seal (1), especially for fuel injection valves, for sealing a borehole (4) provided in a body (3). The high-pressure seal (1) comprises a sleeve (9) provided with a profiled element at least in sections on an outer side. The high-pressure seal (1) comprises a sealing bolt (11) having at least one blind hole (19) and a compression element (12). The sleeve (9) is inserted into the borehole (4) from a first side (6), the sealing bolt (11) being introduced into the sleeve (9) from a second side (7) opposite the first side (6). An outer diameter (c) of the compression element (12) is larger than an inner diameter (b) of the blind hole (19) of the sealing bolt (11). The compression element (12) is pressed into the blind hole (19) of the sealing bolt (11) such that at least one form closure is formed between the profiled element (14) of the sleeve (9) and the body (3) in the region of the borehole (4). A collar (18) of the sealing bolt (11) is pressed at least indirectly against the body (3) on the second side (7).
Description
Technical field
The present invention relates to high pressure seal, be particularly useful for the high pressure seal of Fuelinjection nozzle and be provided with the Fuelinjection nozzle of such high pressure seal.The invention particularly relates to the field of the sparger of the fuel injection system that is used for compressed-air actuated, self ignition formula internal-combustion engine.
Background technique
By WO 03/026033 A1 known a kind of device that is used for Fuelinjection nozzle with piezo actuator.This piezo actuator has the conductor rail of two end faces and two conductions, and each conductor rail passes actuator from an end face.This actuator is clamped between two sheet metals, and each sheet metal is set on the end face.This external each end face and be arranged between sheet metal there and be provided with the isolation layer of an electrical insulation.The conductor rail of conduction guides by a sheet metal.
Have its shortcoming by the known device of WO 03/026033 A1, promptly the sealing that is in the fuel under the high pressure is restricted.As long as this device is placed into when wherein being provided with the actuation chamber that is in the fuel under the high pressure, just there is a problem, the conductor rail of the promptly stress-free relatively outside-conduction is directed into this outside-high pressure difference of appearance, and this makes sealing become difficult.
Can consider that in order for example to seal the glass melt that the hole that the conductor rail of conduction passes its derivation is used as insulator work injects.For example make metal body be heated to the fusing point of glass with the conduction conductor rail that in bore region, is surrounded by glass bushing with hole, wherein constitute hermetic unit after the quenching of following, the sealing part produces based on the stress that the different temperatures expansion coefficient by material causes.Can consider in the case: whole unit is provided with a nickel-Jin layer and is pressed into the hole of a taper from the high pressure side in the attachment portion.But this system has its shortcoming, promptly handles bothersomely, because need a plurality of different manufacturing steps, additional expensive contact segment and may needing is used to prevent electrical short or the additional treatments program of the discharge that caused by voltage.In addition because vibration, the damage that pressure surge or other reason can cause sealing, especially in the zone of glass melt.
Summary of the invention
Has its advantage according to the high pressure seal of the feature with claim 1 of the present invention and Fuelinjection nozzle with feature of claim 13 by contrast, promptly obtained reliable high pressure seal, this high pressure seal has high mechanical stability and also is applicable to high pressure.
The favourable further configuration of high pressure seal that can obtain in claim 1, providing by described measure in the dependent claims and the Fuelinjection nozzle that in claim 13, provides.
The layout of high pressure seal advantageously, wherein, the medium that is under the high pressure is set on second side, rises along with the pressure of medium with the power that causes ring to be pressed on the matrix.Therefore obtain the sealing function of a self intensification, so that can guarantee reliable sealing.In addition can be by the sleeve profile of band helical teeth and the additional sealing function of the sealed formation of shape between the matrix in the bore region, its mode is that this profile will additionally guarantee the sealing on the circumference.
The press fit parts are configured spherical press fit parts in an advantageous manner.The press fit parts can be made simply and also can be pressed into simply in the blind hole of sealing bolt thus.
Favourable also is, the press fit parts have a barrel-shaped zoarium that is press-fitted that is pressed in the blind hole.In addition advantageously, the press fit parts have a contact component, and this contact component for example is configured shaft-like contact plug.The barrel-shaped configuration of press fit parts has guaranteed the location of the relative blind hole of contact component in the case, reaches with the contact that realizes contact component and for example prevents short circuit.Obtain the multiple possibility that is used to contact of contact component at this.
Advantageously be provided with the insulation device of an electrical insulation, it makes the relative matrix electrical insulation of sealing bolt.Can and so constitute sealing bolt and matrix and other possible parts by metal thus by conductive material.This just on the one hand allows with material relatively high pressure sealing favourable relatively on the cost and allows on the other hand to medium, especially to the high durability of fuel.In the case advantageously, the insulation device is made of an electric insulation layer.This electric insulation layer preferably is applied on the sealing bolt, but relatively advantageously realizes on this cost.Electric insulation layer for example can be made of teflon (Teflon).
Advantageously, electric insulation layer has a layer thickness in a sealing area, and this layer thickness is not more than an extruding thickness limit.In sealing area, occur big relatively power just, can occur extruding thus.For the pressure extrusion that the insulating material that prevents on the sealing surface is applied in, maximum layer thickness promptly pushes thickness limit and preferably determines by the ratio of layer thickness and sealing bolt diameter.For the pairing of the material of steel and teflon, the ratio of extruding thickness limit and bolt diameter for example is that the friction factor of the pairing of 1/150 value and teflon and steel is μ
0=0.08.
Advantageously, the ring of sealing bolt has a sealing the margin, and sealing bolt is crushed on the matrix in sealing edge.Here this is exerted pressure and also can be indirectly, especially realizes by an isolation layer.This has its advantage, has promptly constituted a definite hermetic unit with high resistance to pressure, wherein by by being in fuel under the high pressure has obtained a self intensification to the pressurization of the ring of sealing bolt hermetic unit.
Favourable also is, sealing bolt has a contact component, and this contact component is made of a blind hole.Can be implemented in simply electrically contacting of high pressure seal on the sealing bolt thus.And other configuration of contact component also is favourable, for example is configured shaft-like contact plug, and it is set on the side of ring of sealing bolt.
Advantageously, the hole that is located in the matrix is formed as shoulder hole, its middle sleeve is inserted in the shoulder hole, reaches at least basically on the stage of this shoulder hole always, simplifies and guarantees in assembled state sealing function reliably with the assembling that causes high pressure seal.
Can be received in the task that the profile of the sleeve in the matrix has is to guarantee that sleeve remains in the hole reliably.Especially under the effect of press fit parts, obtain fixing a, friction lock and merge being connected of preferred convection cell sealing by the profile and the interaction of hole inner circumference.Concrete configuration about the sleeve profile has multiple different possibility.Here should point out in this, below described contour shape also can make up mutually, preferably such, promptly profile has the not profile section of isomorphism type.
Profile according to a preferred form of implementation sleeve is configured helical teeth, and have preferably around and the tooth (ring gear) that separates in the axial direction, these teeth are not accurately to extend diametrically, but at least on a side a relative radial plane arrange with angle.The angle (oblique angle) that the relative radial plane of the pitch face of at least one tooth has can be selected by the scope between 1 ° and 89 ° according to application corresponding.
Here can realize a form of implementation, wherein the toothed portion of profile or tooth on the direction of the ring that leaves sealing bolt, promptly oblique to first inclination of matrix.This form of implementation allows sleeve to be installed in the hole relatively simply against true dip direction, form of implementation, promptly wherein at least one tooth of profile, preferably at least some teeth directionals the direction of matrix first side or are had tangible advantage against the form of implementation that the installation direction of sleeve tilts, promptly these teeth can prevent that sleeve from throwing off absent-mindedly against installation direction.
Also can be additionally or conversion ground, some teeth of profile or all teeth tiltedly constitute in the direction updip towards the ring of sealing bolt, and promptly the direction of matrix second side that is reclining towards the direction of sleeve installation direction or towards the sealing bolt ring tilts.
As described above, two flank of tooth of helical teeth may tilt towards the direction of sealing bolt ring or the direction of leaving the sealing bolt ring.Also can realize a kind of like this form of implementation, wherein one of two of tooth flank of tooth are arranged in the radial plane at least approx and only are that another flank of tooth is towards ring or leave the ring earth tilt.The flank of tooth of Qing Xieing preferably relates to the flank of tooth that is positioned on the true dip direction in the case.To be that they tilt with the relative radial plane of identical angle under the situation that two flank of tooth tilt, or to use advantageously, be provided with different angles of inclination for each flank of tooth of a tooth for some.Also can realize a kind of like this form of implementation, it is trapezoidal that the tooth of profile is that its cross section of some teeth of at least one tooth of profile or profile is configured at least approx, and promptly the flank of tooth of tooth tilts in opposite directions.Also can be that the surface towards the hole inner circumference of tooth is configured flat at least approx in the case.Also convertiblely, each flank of tooth of tooth extends to becoming on the surface of circle in the axial direction of respective teeth.
Propose in further configuration of the present invention, the tooth of profile, the always relative minute surface radially of the part of the tooth of profile is symmetrically by moulding at least.This means that under the situation of stepped tooth configuration the flank of tooth tilts towards opposite direction with the equal angular value.
Can realize a form of implementation in addition, wherein the tooth of profile, narrowed to gradually on the pinnacle radially to the tooth of small part.In other words these teeth have a leg-of-mutton shape especially at least approx in its cross section.
A particularly advantageous form of implementation according to the present invention advantageously proposes, and profile is formed as thread contour, and promptly tooth spiral-shaped comes moulding around the excircle of sleeve with what determine slope or variable slope.Also can be that interlaced with each other or at least two spirals of at least two spirals are for example arranged in the axial direction with different slopes with being spaced from each other in the case.
Decide on application purpose, a preferred form of implementation is, wherein at least one flank of tooth of profile, especially institute's geared surface is rounded.And also can be, at least one flank of tooth of profile, especially institute's geared surface with the form of the chamfering determined by deburring.
Convertible ground of above-described differently contoured modification or combination in any ground are realized on a sleeve.
Description of drawings
At length explain the present invention by accompanying drawing in the following description, in the accompanying drawings corresponding parts are provided with consistent label.
Accompanying drawing is represented:
Fig. 1: according to the perspective cross-sectional slice of the high pressure seal before assembling of the first embodiment of the present invention;
Fig. 2: the high pressure seal shown in the Fig. 1 in the part assembled state;
Fig. 3: the high pressure seal shown in the Fig. 1 in assembled state;
Fig. 4: the section of first embodiment's who represents with IV among Fig. 3 high pressure seal;
Fig. 5: according to the perspective cross-sectional slice of second embodiment's a high pressure seal; And
Fig. 6: the perspective cross-sectional slice of Fuelinjection nozzle with high pressure seal of a third embodiment in accordance with the invention;
Fig. 7 a, 7b: the different views of possible form of implementation of the sleeve that is used for high pressure seal of a profile that is provided with the band helical teeth, wherein tooth is against the installation direction earth tilt;
Fig. 8 a, 8b: two different views that another of a sleeve that is used for high pressure seal that is provided with toothed profile may form of implementation, its tooth is configured trapezoidal in cross section;
Fig. 9 a, 9b: one be provided with may form of implementation with another of the sleeve that is used for high pressure seal of the profile of symmetrical tooth two different views;
Figure 10 a, 10b: two different views that are provided with another possibility form of implementation of the sleeve that is used for high pressure seal of being with profile symmetry, that extend to most advanced and sophisticated tooth;
Figure 11 a, 11b: two different views that another of a sleeve that is used for high pressure seal that is provided with thread contour may form of implementation.
Concrete form of implementation
Fig. 1 represents the high pressure seal 1 before assembling according to the first embodiment of the present invention.High pressure seal 1 is particularly useful for the Fuelinjection nozzle 2 represented as summary among Fig. 6.High pressure seal is specifically designed to relative atmospheric pressure and seals the fuel that is under the high pressure, and wherein, high pressure seal 1 allows conducting electrical signal or electric flux.This high pressure seal 1 can be used for sealing very high pressure, for example 200Mpa (2000 crust).An advantageous applications of Fuelinjection nozzle 2 is to have the fuel injection system of common rail, and this fuel injection system will be in fuel under the high pressure a plurality of Fuelinjection nozzles 2 that lead.But also be applicable to other application according to high pressure seal 1 of the present invention and Fuelinjection nozzle 2 according to the present invention.
High pressure seal 1 is used for sealing a hole 4 that is arranged on a matrix 3, and this hole 4 is made to shoulder hole and has at least one step 5, and matrix 3 has first side 6 and second side 7 that is positioned at first side, 6 opposites.On second side 7, acted on the high pressure of relative first side 6 at work.For example on second side 7, can have the fuel that is under the high pressure, and on first side 6, have atmospheric pressure.High pressure seal 1 is assembled in this wise, promptly answer guarantee effect in the pressure of second side 7 with respect to first side 6 on low relatively wiper seal.Hole 4 has diameter a from first side 6 up to step 5, wherein can be provided with an angled section 8.In being the part in hole 4 of a, diameter inserts a sleeve 9, as by as indicated in the arrow 10 by first side 6.High pressure seal 1 also has a sealing bolt 11 and press fit parts 12.Sleeve 9 is by in such patchhole 4, so that sleeve 9 is supported on the step 5.Sleeve 9 has one in this embodiment with the profile 14 of helical teeth on the outside 13, this helical teeth profile is roughly against being tilted by the direction of insertion shown in the arrow 10.
Fig. 2 is illustrated in the high pressure seal 1 in the part assembled state, and its middle sleeve 9 is inserted in the hole 4.Here the external diameter in the outside 13 of sleeve 9 is basically corresponding to the diameter a of hole 4 up to step 5 places.This outer sleeve 9 has a hole 15, and this hole has diameter b.Hole 15 can be configured before inserting sleeve 9.Yet this hole 15 is just got out after also can be in sleeve 9 patchholes 4, so that reach with high relatively validity hole 15 is oriented on the axis 16 of high pressure seal 1.
Sealing bolt 11 has a blind hole 19, and it has an inner diameter d basically.Here the diameter d of blind hole 19 is slightly smaller than the external diameter c of the press fit parts 12 that are configured spherical press fit parts 12.After sealing bolt 11 is installed, press fit parts 12 are embedded in the blind hole 19.Sealing bolt 11 expands in the zone of blind hole 19 thus, so that the diameter in its outside 17 increases.Therefore sleeve 9 also expands, thus profile 14 some is pressed in the matrix 3 and sealed being connected of formation shape between sleeve 9 and matrix 3 at least.
Fig. 3 is illustrated in the high pressure seal 1 in the assembled state, and press fit parts 12 are embedded in the blind hole 19 of sealing bolt 11 in this state.Sleeve 9 is out of shape in the zone of the helical teeth of profile 14 because the mistake size of the inner diameter d of spherical press fit parts 12 relative blind holes 19, sealing bolt 11 reach thus in the zone of blind hole 19, especially expansion.This distortion produces the sealed or press fit of shape with matrix 3.This distortion of being pressed in the matrix 3 of helical teeth by profile 14 simultaneously produces tensile stress in the lower area 20 of sealing bolt 11, so that ring 18 is pressed on the matrix 3.The pressure of this outer fuel acts on second side 7 of matrix 3, and this is by arrow 21 expressions, and this pressure is with a vertical force F
NOn the ring 18 that acts on sealing bolt 11 on the direction of axis 16.This vertical force F
NPlay the effect that sealing function is additionally strengthened, as further describing by Fig. 4.Because vertical force FN and pressure correlation, therefore obtain the sealing function of the self intensification of high pressure seal 1.
Sealing bolt 11 is partly covered by an electric insulation layer 25 in addition, and it is the insulation device of the electrical insulation between sealing bolt 11 and matrix 3, and this insulation device is the material of electrical insulation or the material of electrical insulation.This electric insulation layer 25 will prevent the electrical short between sealing bolt 11 and the matrix 3.Therefore both can also can produce and the electrically contacting of sealing bolt 11,, and not form short circuit with matrix 3 so that for example make electric energy be transmitted to second side 7 by first side 6 from first side 6 from second side 7.The connection of a customer then can reach by high pressure seal 1 on the one hand and realize by matrix 3 on the other hand.Yet a plurality of high pressure seals 1 also can be set, wherein form and being connected of a positive electrode and being connected by another high pressure seal formation and a negative electrode by high pressure seal.
The section of first embodiment's who represents with IV in Fig. 4 presentation graphs 3 high pressure seal 1.Sealing bolt 11 constitutes by 4 towards second sides, 7 ground, the hole in the matrix 3 at an edge 26-this edge of matrix 3-the zone in have an otch 27 so that sealing bolt 11 relative matrixes 3 are spaced apart in the zone at edge 26.In addition the ring 18 of sealing bolt 11 towards second side, 7 ground of matrix 3 relatively its radially bearing of trend have a negative angle so that abut on second side 7 of matrix 3 at a sealing the margin 30 place's rings 18 of ring 18.Here based on layer 25, this reclines is indirect, so that is in formation sealing surface 31 between layer 25 and the matrix 3 at sealing the margin 30.Sealing face 31 is used for relative fuel pressure sealing, and this fuel pressure is at power F of region generating of sealing the margin 30
DThe layer thickness h of this nexine 25 is less than or equal to an extruding thickness limit, to prevent by applied pressure layer 25 being squeezed on the sealing surface 31.By an example determining as the layer thickness h that pushes thickness limit is described below.
The effective pressure face A of sealing bolt 11
BExternal diameter e and Lu Duoer husband constant π by the ring 18 of the sealing bolt shown in Fig. 3 11 draw:
(1)A
B＝π*e
2/4。
Obtain acting on vertical force F on the sealing bolt 11 by the pressure p of the medium on second side 7 that is located at matrix 3
N:
(2)F
N＝p*A
B。
Wherein pressure p for example can be 200MPa.Obtain acting on vertical force F on the sealing bolt 11 by formula (1) and (2)
N:
(3)F
N＝p*π*e
2/4。
The surface area A that obtains the sealing part by the external diameter e and the layer thickness h of the ring 18 of sealing bolt 11
D:
(4)A
D＝π*e*h。
Pressure p and sealing surface area A partly by medium
DPressure F on the hermetic unit that obtains providing by sealing surface 31
D:
(5)F
D＝p*A
D。
Therefore obtain pressure F on the hermetic unit by formula (4) and (5)
D:
(6)F
D＝p*π*e*h。
Be used to overcome the power F that adheres to friction that the material is made up of the material of matrix 3 and the material of layer 25 matches
RBy relevant therewith coefficientoffriction
0And the vertical F on the sealing bolt 11
NDraw:
(7)F
R＝μ
0*F
N＝μ
0*p*π*e
2/4，
Wherein in formula (7), use vertical force F according to formula (3)
N
In order to improve the reliability of sealing, for frictional force F
RConsider x margin of safety doubly.For example can select x to equal 3, then obtain:
(8)F
X＝3*F
D＝3*p*π*e*h，
Wherein for frictional force F
XBe chosen as pressure F with 3 times of margin of safety
D3 times.By will be according to the frictional force F of formula (7)
RWith frictional force F with 3 times of margin of safety according to formula (8)
XBe set as equal, that is:
(9)F
R＝F
X，
After simplifying, some obtain:
(10)h/e＝μ
0/(3*4)。
Here consider i.e. 3 times the margin of safety of coefficient 3.Also can not select coefficient 3 and select other coefficient, so that usually with the x given frictional force F of margin of safety doubly
XFriction factor for the pairing of teflon (Teflon) and steel is:
(11)μ
0＝0.08
Ratio for the external diameter that pushes thickness limit, the maximum layer thickness h that can select and sealing bolt 11 obtains:
(12)h/e＝μ
0/12＝0,08/12＝1/150。
As can be seen, passing through type (10), especially the given extruding thickness limit of formula (12) is interpreted as maintained maximum value in the zone of sealing the margin 30 at least, to prevent the extruding in the regional middle level 25 of sealing the margin 30.Layer 25 remaining part, be the layer thickness h that layer 25 beyond the sealing the margin 30 also can have other.This outer layer thickness h also can be selected must be less than the extruding thickness limit of trying to achieve by formula (10).This outer layer thickness h can be subjected to above the safety coefficient x-selecting to equal selection and the coefficientoffriction of 3-within certain limit
0Influence.
Fig. 5 represents according to the high pressure seal 1 shown in Fig. 3 of second embodiment of the invention.Here the section of representing with IV with correspondingly arrange by the described section of Fig. 4.Sealing bolt 11 has a contact component 35, the i.e. contact position that is made of a blind hole in this embodiment.In contact component 35, can insert one thus and be used for the plug or the like that on second side 7, contact with high pressure seal 1.
This external blind hole 19 reserve part 36-by this part press fit parts 12 have been pressed in the blind hole 19-in can insert a plug or like so that realize and the contacting of high pressure seal 1 from first side 6.
Contact on first side 6 and/or second side 7 also can otherwise for example realize by welding.
Fig. 6 represents to have the Fuelinjection nozzle 2 of reduced representation of a high pressure seal 1 of a third embodiment in accordance with the invention.Here section of being represented by IV and the section shown in Fig. 4 are correspondingly arranged.Matrix 3 is placed in the valve chest 37 of Fuelinjection nozzle 2 in this embodiment.But matrix 3 also can be the part of valve chest 37 or constitutes one with valve chest 37.Fuelinjection nozzle 2 has the operation equipment 38 of a reduced representation, and the fuel that is under the high pressure is transfused to this operation equipment by a conduit 39.In Fuelinjection nozzle 2 work, in a valve chamber 40, also can have the fuel that is under the high pressure.Operation equipment 38 one side electrically contact and electrically contact with matrix 3 on the other hand with the contact component 35 of high pressure seal 1.Be provided with a control gear 44 in addition, it electrically contacts with press fit parts 12 and electrically contacts with matrix 3 on the other hand on the one hand.Electric energy is transmitted to by valve chest 37 on the operation equipment 38 of inside of valve chest 37, so that operating fuel injected valve 2, wherein fuel can eject by a spray orifice 41.Press fit parts 12 have one and barrel-shaped are press-fitted fit 42 and contact components 43 in this embodiment.Here barrel-shaped be press-fitted fit 42 and be pressed in the blind hole 19, so as the zone of helical teeth profile 14 in be connected in formation press fit between sleeve 9 and the matrix 13.The contact component 43 of press fit parts 12 is configured as the contact plug of rod, so that realize being connected with control gear 44 by a jack.Sealing bolt 11 also has the contact component 35 that is configured as contact plug in addition, so that realize being connected with operation equipment 38 by a jack.Here be press-fitted axis 16 orientations of the contact component 35 of contact component 43 that fit 42 barrel-shaped configuration and the layout (Fig. 2) of sealing bolt 11 in hole 15 realized press fit parts 12 and sealing bolt 11 along high pressure seal 1.
As described in detail by Fig. 4, the sealing by ring 18 relative matrixes 3 has constituted high voltage bearing first hermetic unit.The profile 14 of the band helical teeth by sleeve 9 and the shape between the matrix 3 are sealed has has in addition connected and composed high voltage bearing second hermetic unit.These two hermetic units have guaranteed the reliable function of high pressure seal 1, are spilt by valve chest 37 with the fuel that is under the high pressure that prevents to be provided with in valve chamber 40.A plurality of high pressure seals 1 also can be set here, so as for example to make measurement signal by the conducted inside of valve chest 37 on control gear 44 or similar device.
The different embodiments of the possible profile 14 of sleeve 9 are below described.Here given sleeve 9 above the sleeve 9 that provides can being replaced in corresponding high pressure seal.Here possible contour shape is not limited on the described embodiment.Especially can realize the combination of different types of profiles.Common is profile 14 on the excircle that is arranged on sleeve 9 that all describe below: they have at least one tooth 45 around in a circumferential direction.
First embodiment of a profile 14 of expression in Fig. 7 a and 7b wherein selects to represent and select in Fig. 7 b to represent with side view with sectional view in Fig. 7 a.The sleeve 7 of hollow cylinder is provided with its exterior contour 14 as can be seen, and this profile is made of a plurality of teeth that separate in the axial direction.Having constituted one between per two annular tooth that separate in the axial direction 45 also is the ring slot 46 that extends in a circumferential direction.As can be seen, profile 14 relates to the profile of a band helical teeth, wherein only be the flank of tooth 47 of carrying matrix first side 6 of tooth 45 on the direction of first side 6 of matrix 3 against mounting direction 10 earth tilt.Each other flank of tooth 48 of tooth 45 always is arranged in a plane radially.As especially appreciable, be located axially at the moulding and constitute a flat coaxial rings smoothly basically of two tooth surfaces 49 between the flank of tooth 47,48 around axis 16 by Fig. 7 b.Between two mutual opposed flank of tooth 47,48, open an angle [alpha].The bottom of teeth groove 46 has a bottom radius R (radius of curvature).For parameter for the purpose of clear is that angle [alpha] and base diameter R only show in Fig. 7 a.In other contour shape, will avoid the description of these parameters according to Fig. 8 a to Figure 11 b.These parameters are that base diameter R and angle [alpha] can change according to load condition (applicable cases).Axial increment tooth pitch between each adjacent tooth 45 (teeth groove 46 extend axially distance) can be selected different sizes calmly on applicable cases in addition.
Expression has a sleeve 7 with the profile 14 of symmetrical tooth 45 among Fig. 9 a and the 9b.Here the flank of tooth 47,48 of each tooth 45 relative one radially minute surface E mirror image tilt symmetrically.The surface 49 that is arranged between these flank of tooth of each tooth 45 is flat, promptly is configured to level and smooth.As can be seen, beguine is significantly more sharp-pointed according to the embodiment of Fig. 8 a and 8b basically in the bottom of each teeth groove 46.The bottom of teeth groove 46 does not have curvature at least approx there.
Expression is provided with another embodiment of a sleeve 7 of exterior contour 14 among Figure 10 a and the 10b.This profile 14 by tooth 45 a plurality of symmetries, that extend around sleeve 7 in a circumferential direction be arranged between the tooth, also be that symmetrical teeth groove 46 constitutes.Two flank of tooth 47,48 of each tooth 45 extend to each pinnacle 50 radially outwardly.In other words, the radially-outer surface 49 of each tooth 45 is made of a pinnacle 50.Again in other words, the cross section of tooth 45 is configured triangle.
Embodiment shown in Figure 11 a and the 11b and foregoing embodiment's difference is basically on such scope: tooth 45 respectively constitutes closed ring, but extend in the mode of screw thread with slope P, wherein the slope P of the tooth 45 of single thread forms can change calmly on application purpose.As appreciable by Figure 11 a and 11b, the surface of tooth 45 is formed as level and smooth.
The present invention is not limited on the described embodiment.
Claims (25)
1. high pressure seal (1), be particularly useful for the high pressure seal of Fuelinjection nozzle, be used for sealing a hole (4) that is arranged on a matrix (3), this high pressure seal has: a sleeve (9), this sleeve on the outside at least section ground have a profile (14); A sealing bolt (11), sealing bolt have at least one blind hole (19); Press fit parts (12); Wherein said sleeve (9) inserts the described hole (4) from first side (6), wherein, described sealing bolt (11) is inserted in the described sleeve (9) by second side (7) opposite with described first side (6), the external diameter (c) of wherein said press fit parts (12) is greater than the internal diameter (b) of the described blind hole (19) of described sealing bolt (11), wherein said press fit parts (12) are pressed in the described blind hole (19) of described sealing bolt (11), so that in zone, described hole (4) between the described profile (14) of described sleeve (9) and described matrix (3) at least one shape locked portions of formation, the ring (18) of wherein said sealing bolt (11) is being crushed on the described matrix (3) on described second side (7) at least indirectly.
2. according to the high pressure seal of claim 1, it is characterized in that: described press fit parts (12) are configured spherical press fit parts (12).
3. according to the high pressure seal of claim 1, it is characterized in that: described press fit parts (12) have a barrel-shaped zoarium (42) and a contact component (43) of being press-fitted that is pressed in the described blind hole (19).
4. according to the high pressure seal of claim 3, it is characterized in that: described contact component (43) is configured shaft-like contact plug.
5. according to each high pressure seal in the claim 1 to 4, it is characterized in that: be provided with the insulation device of an electrical insulation, it makes the described relatively matrix of described sealing bolt (11) (3) electrical insulation.
6. according to the high pressure seal of claim 5, it is characterized in that: described insulation device is made of an electric insulation layer (25), and it is applied on the described sealing bolt (11) at least in part.
7. according to the high pressure seal of claim 6, it is characterized in that: described electric insulation layer (25) has a layer thickness at least in a sealing area (31), and this layer thickness is not more than an extruding thickness limit.
8. according to each high pressure seal in the claim 1 to 7, it is characterized in that: the described ring (18) of described sealing bolt (11) has a sealing the margin (30), is pressed at least indirectly on the described matrix (3) at the above sealing bolt of sealing edge (11).
9. according to each high pressure seal in the claim 1 to 8, it is characterized in that: described sealing bolt (11) has a contact component (35).
10. according to the high pressure seal of claim 9, it is characterized in that: described contact component (35) is made of a blind hole (19).
11. the high pressure seal according to claim 9 is characterized in that: described contact component (35) is configured shaft-like contact plug.
12. according to each high pressure seal in the claim 1 to 11, it is characterized in that: the described hole (4) that is located in the described matrix (3) is configured to shoulder hole, wherein said sleeve (9) is inserted in the described shoulder hole, reaches a stage (5) of this shoulder hole at least basically always.
13. according to each high pressure seal in the above claim, it is characterized in that: described profile (14) the helical teeth ground of described sleeve (9) constitutes.
14. the high pressure seal according to claim 13 is characterized in that: the tooth (45) of described profile (14) tilts in the direction of the described ring (18) that leaves described sealing bolt (11).
15. the high pressure seal according to claim 13 or 14 is characterized in that: the tooth (45) of described profile (14) tilts in the direction towards the described ring (18) of described sealing bolt (11).
16. the high pressure seal according to claim 14 or 15 is characterized in that: an only flank of tooth (47,48) of two flank of tooth (47,48) of at least one tooth (45) of described profile (14) or at least one tooth (45) of described profile (14) tilts.
17. according to each high pressure seal in the above claim, it is characterized in that: at least one tooth (45) of described profile (14) is configured to trapezoidal in cross section.
18., it is characterized in that: the always relative moulding symmetrically of minute surface radially of at least one tooth (45) of described profile (14) according to each high pressure seal in the above claim.
19., it is characterized in that: at least one tooth (45) of described profile (14) ground moulding that narrows down gradually towards a pinnacle (50) diametrically according to each high pressure seal in the above claim.
20. according to each high pressure seal in the above claim, it is characterized in that: described profile (14) is shaped to thread contour.
21. according to each high pressure seal in the above claim, it is characterized in that: at least one tooth edge of the tooth (45) of described profile (14), preferably all tooth edges are rounded.
22. according to each high pressure seal in the above claim, it is characterized in that: at least one tooth edge of the tooth (45) of described profile (14), preferably all tooth edges are by deburring.
23. according to each high pressure seal in the above claim, it is characterized in that: described profile (14) has at least two different profile sections.
24. Fuelinjection nozzle (2), be particularly useful for the sparger of the fuel injection system of compressed-air actuated, self ignition formula internal-combustion engine, have an operation equipment (38) that is arranged in the valve chest (37), wherein this operation equipment (38) can be by being connected with a control gear (44) according to each high pressure seal (1) in the claim 1 to 23 at least.
25. Fuelinjection nozzle according to claim 24, it is characterized in that: described matrix (13) is presented in the described valve chest (37), described matrix (13) is connected with this valve chest (37) material sealedly or constitutes one with this valve chest (37), is provided with the described hole (4) by described high pressure seal (1) sealing in described matrix.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200820004065 DE202008004065U1 (en) | 2008-03-25 | 2008-03-25 | High pressure seal |
| DE202008004065.5 | 2008-03-25 | ||
| PCT/EP2009/051116 WO2009118215A1 (en) | 2008-03-25 | 2009-02-02 | High-pressure seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101981359A true CN101981359A (en) | 2011-02-23 |
| CN101981359B CN101981359B (en) | 2013-08-21 |
Family
ID=39510266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980110469.8A Expired - Fee Related CN101981359B (en) | 2008-03-25 | 2009-02-02 | High-pressure seal |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2263029A1 (en) |
| CN (1) | CN101981359B (en) |
| DE (1) | DE202008004065U1 (en) |
| WO (1) | WO2009118215A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011367A (en) * | 2011-12-20 | 2014-08-27 | 罗伯特·博世有限公司 | Fuel injection valve |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013009557B4 (en) * | 2013-06-07 | 2020-03-12 | Mann+Hummel Gmbh | Press-fit component |
| RU2017103997A (en) * | 2014-07-18 | 2018-08-20 | Эс Эф Си КОЕНИГ АГ | LOCKING ELEMENT |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3193895A (en) * | 1962-02-23 | 1965-07-13 | Oxley Robert Frederick | Plug and socket connections |
| CN1196461A (en) * | 1997-04-02 | 1998-10-21 | 卡明斯发动机公司 | High-pressure sealable connector for pressure sensor |
| WO2003026033A1 (en) * | 2001-09-12 | 2003-03-27 | Siemens Aktiengesellschaft | Device with a piezoelectric actuator |
| DE10220620A1 (en) * | 2002-05-08 | 2003-11-27 | Siemens Ag | Stopper for sealing stepped bore under pressure fits into wider section of bore and transitional section between this and its narrow part and has central bore containing ball which presses it against bore |
| DE102004032572A1 (en) * | 2004-07-05 | 2006-01-26 | Tyco Electronics Amp Gmbh | Connecting arrangement and contact pin |
| CN101146994A (en) * | 2005-02-15 | 2008-03-19 | 西门子公司 | Sealing device for a fuel injector, and sealing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006062006A1 (en) * | 2006-12-29 | 2008-07-03 | Robert Bosch Gmbh | High pressure seal |
-
2008
- 2008-03-25 DE DE200820004065 patent/DE202008004065U1/en not_active Expired - Lifetime
-
2009
- 2009-02-02 EP EP09724255A patent/EP2263029A1/en not_active Withdrawn
- 2009-02-02 WO PCT/EP2009/051116 patent/WO2009118215A1/en active Application Filing
- 2009-02-02 CN CN200980110469.8A patent/CN101981359B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3193895A (en) * | 1962-02-23 | 1965-07-13 | Oxley Robert Frederick | Plug and socket connections |
| CN1196461A (en) * | 1997-04-02 | 1998-10-21 | 卡明斯发动机公司 | High-pressure sealable connector for pressure sensor |
| WO2003026033A1 (en) * | 2001-09-12 | 2003-03-27 | Siemens Aktiengesellschaft | Device with a piezoelectric actuator |
| DE10220620A1 (en) * | 2002-05-08 | 2003-11-27 | Siemens Ag | Stopper for sealing stepped bore under pressure fits into wider section of bore and transitional section between this and its narrow part and has central bore containing ball which presses it against bore |
| DE102004032572A1 (en) * | 2004-07-05 | 2006-01-26 | Tyco Electronics Amp Gmbh | Connecting arrangement and contact pin |
| CN101146994A (en) * | 2005-02-15 | 2008-03-19 | 西门子公司 | Sealing device for a fuel injector, and sealing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011367A (en) * | 2011-12-20 | 2014-08-27 | 罗伯特·博世有限公司 | Fuel injection valve |
| CN104011367B (en) * | 2011-12-20 | 2017-07-18 | 罗伯特·博世有限公司 | Fuelinjection nozzle |
| US9822749B2 (en) | 2011-12-20 | 2017-11-21 | Robert Bosch Gmbh | Fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009118215A1 (en) | 2009-10-01 |
| DE202008004065U1 (en) | 2008-06-12 |
| EP2263029A1 (en) | 2010-12-22 |
| CN101981359B (en) | 2013-08-21 |
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