EP0994250B1 - Hochdruck-Sensor - Google Patents
Hochdruck-Sensor Download PDFInfo
- Publication number
- EP0994250B1 EP0994250B1 EP99810565A EP99810565A EP0994250B1 EP 0994250 B1 EP0994250 B1 EP 0994250B1 EP 99810565 A EP99810565 A EP 99810565A EP 99810565 A EP99810565 A EP 99810565A EP 0994250 B1 EP0994250 B1 EP 0994250B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- welding
- threaded body
- pressure sensor
- sensor according
- pressure
- 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.)
- Expired - Lifetime
Links
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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
Definitions
- the invention relates to high pressure sensors, e.g. in Injection systems for internal combustion engines or liquid jet cutting machines etc., especially where pulsating hydraulic Pressures to measure or to peak with thousands of bar are control.
- the invention relates to surveillance systems of diesel engines, where peak values from 2000 to 3000 bar are to be measured.
- FIGS. 4 to 7 illustrate the idea of the invention, which is defined in independent claim 1.
- Fig. 1 represents a commercially available piezoresistive high pressure sensor consists of the four main parts: threaded body 1, Measuring head 2 and membrane part 3, on which the measuring bridge 4 is applied is.
- Fig. 2 is the threaded body 5, the sealing section 6 and the membrane part 7, on which the capacitive measuring part 8 is mounted, in one piece executed.
- the membrane part 11 is in one piece with the sealing section 10 executed and welded to the sealing body 10 with the threaded body 9.
- the measuring bridge 12 consists of a silicone element that is blown onto the membrane part 11.
- the main idea of the invention relates to the overall view of the hydraulic and mechanical part to make it permanently reliable Find a solution suitable for monitoring purposes.
- the pressure sensor consists of the 6 main parts: threaded body 16 probe 14 membrane game 21 measuring bridge 22 sealing portion 20 welding game 15 all of which are coordinated with one another with regard to mechanically permissible material tensions.
- the membrane section 21 is determined by the parameters ⁇ D 1 , ⁇ D3 and thickness t.
- Minimum diameters d of the feed line are also of great importance 19 and the sealing section 20 in order to minimize material stresses to reach.
- the further part of the invention is directed to the design of the Welding section 15, the execution of which is decisive for safe Continuous operation of the pressure sensor. Long series of tests have shown that welding gaps from the inside, i.e. from the pressure side, below must be prevented in all circumstances ..
- Fig. 5 shows the welding process by means of internal welding in Moment of sweat start.
- the dimensions are according to known regulations of electrical butt welding technology, where the measuring head 14 is held by the electrode 32 and is electrical connected is.
- the fusion begins along the Welding cone surface 30, with pressure neck part 24 and welding cone 30 flow into one another, the welding path S being used up.
- Fig. 6 shows the state after the internal welding, the Welding path S through the press welding to the external welding gap 36 was reduced.
- the welding zone 34 has a transition radius 35, which is free of internal gaps. So that the pressure impulses find no attack surfaces from the inside due to the notch effect can lead to tears.
- the remaining outer welding gap 36 is in another Operation with a laser, gas or electron beam welding closed.
- the design of the balloon-like pressure measuring space according to the invention with print head part 23 and print neck part 24, with the combined Internal welding to prevent tearing from the inside, and the external welding, to ensure the mechanical strength the connection of the measuring head 14 with the threaded body 16 and the smallest possible diameter d of the feed line 19 is Basis for a high pressure sensor for continuous operation with peak pressures created up to 2500 bar.
- the design of the membrane section 21 applied measuring bridge 22 can be based on various known technologies.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
- Glass Compositions (AREA)
Description
- Fig. 4
- zeigt schematisch den erfindungsgemässen Druckgeber im Schnitt,
- Fig. 5
- zeigt den Messkopf vor dem Innenschweissvorgang,
- Fig. 6
- zeigt denselben Messkopf nach dem Innenschweissvorgang und vor dem Aussenschweissvorgang,
- Fig. 7
- zeigt die fertige Verbindung zwischen Messkopf und Gewindeteil.
Gewindekörper | 16 |
Messkopf | 14 |
Membranpartie | 21 |
Messbrücke | 22 |
Dichtpartie | 20 |
Schweisspartie | 15 |
- das optimale Messsignal Ø D1 wirkt
- die minimale Materialspannung Ø D2 wirkt
- Fig.
-
- 1
- Gewindekörper
- 2
- Messkopf
- 3
- Membranteil
- 4
- Messbrücke
- Fig. 2
-
- 5
- Gewindekörper
- 6
- Dichtpartie
- 7
- Membranteil
- 8
- Messteil
- Fig. 3
-
- 9
- Gewindekörper
- 10
- Dichtpartie
- 11
- Membranteil
- 12
- Messbrücke
- Fig. 4
-
- 14
- Messkopf
- 15
- Schweisspartie
- 16
- Gewindekörper
- 17
- Schlüsselfläche
- 18
- Gewinde
- 19
- Zuleitung
- 20
- Dichtpartie
- 21
- Membranpartie
- 22
- Messbrücke
- 23
- Druckkopfteil
- Ø D1, Ø D3, t
- Membranparameter
- 24
- Druckhalsteil
- Ød
- Zuleitungs-Durchmesser
- α
- Öffnungswinkel des Ballons
- Fig. 5
-
- 30
- Schweisskonus
- 31
- Halskante
- 32
- Elektrode
- S
- Schweissweg
- Fig. 6
-
- 34
- Innen-Schweisszone
- 35
- Übergangsradius
- 36
- Aussen-Schweissspalt
- Fig. 7
-
- 37
- Aussen-Schweisszone
Claims (9)
- Hochdruck-Sensor, insbesondere zur Messung von pulsierenden Drücken hydraulischer Systeme, vorzugsweise im Bereich von über 2000 bar Spitzenwerten, mit einem Messkopf (14), der eine Membranpartie (21) aufweist und einem Messdruckraum umschliesst, und mittels Schweissung (15) mit einem Gewindekörper (16) verbunden ist, dadurch gekennzeichnet, dass der Messdruckraum ballonartig gestaltet ist und in einen Druckkopfteil (23) mit grösserem Durchmesser (Ø D1) und einem Druckhalsteil (24) mit kleinerem Durchmesser (⊘ D2) aufgeteilt ist.
- Hochdruck-Sensor nach Anspruch 1, dadurch gekennzeichnet, dass die Verbindung des Messkopfes (14) mit dem Gewindekörper (16) derart gestaltet ist, dass sie von der Druckseite her frei von Schweissspalten ist, welche infolge Kerbwirkung zu Wanderrissen führen.
- Hochdruck-Sensor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die mechanische Strukturverbindung des Messkopfes (14) mit dem Gewindekörper (16) mit einer Aussenschweissung (37) durchgeführt ist, die eine Elektronenstrahl-, Schutzgas- oder Laserschweissung sein kann.
- Hochdruck-Sensor nach einem der Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die Verbindung zwischen Messkopf (14) und Gewindekörper (16) mittels Doppelschweissung in zwei Stufen sichergestellt ist, wobei zuerst mittels Elektrostauchschweissung eine Innenschweissung (34), mittels Elektronenstrahl-, Schutzgas- oder Laserschweissung anschliessend eine Aussenschweissung (37) erstellt wird.
- Hochdruck-Sensor nach Anspruch 4, dadurch gekennzeichnet, dass die Innenschweissung (34) über einen Schweisskonus (30) erfolgt, der am Gewindekörper (16) angedreht ist, und über eine Halskante (31) so durchgeführt wird, dass durch Schweissstrom und Presskraft (P) auf die Elektrode (32) ein Schweissweg (S) zurückgelegt wird, der Flüssigmaterial so verdrängt, dass ein spaltfreier Übergangsradius (35) entsteht.
- Hochdruck-Sensor nach Ansprüchen 4 oder 5, dadurch gekennzeichnet, dass die Aussenschweisszone (37) und die Innenschweisszone (34) teilweise überlappen, sodass im ganzen Verbindungsteil zwischen Messkopf (14) und Gewindekörper (16) eine verbindende Zone aus Schweissmaterial besteht.
- Hochdruck-Sensor nach Anspruch 1, dadurch gekennzeichnet, dass Messkopf (14) und Gewindekörper (16) mit nur einer Schweissung verbunden sind.
- Hochdruck-Sensor nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Gewindekörper (16) mit einer kleinstmöglichen Durchgangsbohrung (19) ausgeführt ist.
- Hochdruck-Sensor nach Ansprüchen 1 bis 8, dadurch gekennzeichnet, dass die Dichtpartie (20) einstückig mit dem Gewindekörper (16) ausgeführt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01500/98A CH693490A5 (de) | 1998-07-14 | 1998-07-14 | Hochdruck-Sensor. |
CH150098 | 1998-07-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0994250A2 EP0994250A2 (de) | 2000-04-19 |
EP0994250A3 EP0994250A3 (de) | 2000-08-09 |
EP0994250B1 true EP0994250B1 (de) | 2003-04-23 |
Family
ID=4211909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99810565A Expired - Lifetime EP0994250B1 (de) | 1998-07-14 | 1999-07-01 | Hochdruck-Sensor |
Country Status (5)
Country | Link |
---|---|
US (1) | US6092426A (de) |
EP (1) | EP0994250B1 (de) |
AT (1) | ATE238536T1 (de) |
CH (1) | CH693490A5 (de) |
DE (1) | DE59905161D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016113209A1 (de) * | 2016-07-18 | 2018-01-18 | Sensata Germany GmbH | Drucksensor |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034460A1 (de) * | 2000-07-15 | 2002-01-31 | Bosch Gmbh Robert | Hochdrucksensor, Verfahren und Werkzeug zu seiner Herstellung |
US6923068B2 (en) * | 2003-06-19 | 2005-08-02 | Dynisco, Inc. | Pressure transducer |
JP2010249061A (ja) * | 2009-04-17 | 2010-11-04 | Denso Corp | 燃料噴射弁 |
DE102009054689A1 (de) * | 2009-12-15 | 2011-06-16 | Robert Bosch Gmbh | Verfahren zum Herstellen einer Drucksensoranordnung sowie Drucksensoranordnung |
IT1399872B1 (it) | 2010-05-17 | 2013-05-09 | Magneti Marelli Spa | Pompa carburante per un sistema di iniezione diretta |
DE102011078048A1 (de) * | 2011-06-24 | 2012-12-27 | Robert Bosch Gmbh | Sensor zur Erfassung mindestens einer Eigenschaft eines fluiden Mediums |
DE102012207066A1 (de) * | 2012-04-27 | 2013-10-31 | Robert Bosch Gmbh | Sensoranordnung zur Erfassung wenigstens einer Eigenschaft eines fluiden Mediums und Verfahren zur Herstellung einer solchen Sensoranordnung |
DE102014204746A1 (de) * | 2014-03-14 | 2015-09-17 | Robert Bosch Gmbh | Kraftstoffinjektor, insbesondere Common-Rail-Injektor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4164938A (en) * | 1977-11-25 | 1979-08-21 | Patton William F | Medical pressure gauge and indicator device |
US5186055A (en) * | 1991-06-03 | 1993-02-16 | Eaton Corporation | Hermetic mounting system for a pressure transducer |
US5542300A (en) * | 1994-01-24 | 1996-08-06 | Setra Systems, Inc. | Low cost, center-mounted capacitive pressure sensor |
DE29501112U1 (de) * | 1995-01-25 | 1995-03-23 | Baumgarten Heinrich Kg | Druckanzeiger |
US5587601A (en) * | 1995-06-05 | 1996-12-24 | Kulite Semiconductor Products, Inc. | Support structure for a semiconductor pressure transducer |
-
1998
- 1998-07-14 CH CH01500/98A patent/CH693490A5/de not_active IP Right Cessation
-
1999
- 1999-06-28 US US09/340,202 patent/US6092426A/en not_active Expired - Lifetime
- 1999-07-01 EP EP99810565A patent/EP0994250B1/de not_active Expired - Lifetime
- 1999-07-01 AT AT99810565T patent/ATE238536T1/de active
- 1999-07-01 DE DE59905161T patent/DE59905161D1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016113209A1 (de) * | 2016-07-18 | 2018-01-18 | Sensata Germany GmbH | Drucksensor |
Also Published As
Publication number | Publication date |
---|---|
EP0994250A2 (de) | 2000-04-19 |
EP0994250A3 (de) | 2000-08-09 |
DE59905161D1 (de) | 2003-05-28 |
US6092426A (en) | 2000-07-25 |
CH693490A5 (de) | 2003-08-29 |
ATE238536T1 (de) | 2003-05-15 |
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