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WO2006034929A1 - Dispositif d'essai tribologique d'un corps a tester dans une chambre a pression soumise a une surpression - Google Patents

Dispositif d'essai tribologique d'un corps a tester dans une chambre a pression soumise a une surpression Download PDF

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Publication number
WO2006034929A1
WO2006034929A1 PCT/EP2005/054101 EP2005054101W WO2006034929A1 WO 2006034929 A1 WO2006034929 A1 WO 2006034929A1 EP 2005054101 W EP2005054101 W EP 2005054101W WO 2006034929 A1 WO2006034929 A1 WO 2006034929A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure chamber
sensor
test
load
holding
Prior art date
Application number
PCT/EP2005/054101
Other languages
German (de)
English (en)
Inventor
Klaus Meyer
Gernot Repphun
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2006034929A1 publication Critical patent/WO2006034929A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56—Investigating resistance to wear or abrasion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/02—Measuring coefficient of friction between materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/023—Pressure
    • G01N2203/0232—High pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0236—Other environments
    • G01N2203/0242—With circulation of a fluid

Definitions

  • the present invention relates to a device for tribological testing of a test specimen according to the closer in the preamble of claim 1.
  • Tribometers In practice, devices for testing for friction, lubrication and wear are known as so-called tribometers, with which the friction and wear behavior of test specimens is investigated.
  • Tribometer z. B. In the wear test of components for
  • High-pressure injection systems in diesel and gasoline engines, hydraulic units, piston and gear pumps or the like It is called the load of a component to be tested with a real load collective, which is in the final product in the application.
  • a change in the chemical composition of the mixture may occur in the case of a mixture of different fluids as a lubricant mixture mixture, since hardly volatile components accumulate.
  • the present invention seeks to propose a device of the type mentioned, which prevents evaporation of the lubricating medium in a tribological test with real load collectives and at the same time the use of easily combustible and explosive media is also possible.
  • the invention provides a device for tribological testing of a test specimen, comprising as base components a holding device for holding the test specimen, a drive device for generating a relative movement between the specimen and a counter body, a Load generating device for applying a predetermined load on the test specimen, and a feed device for supplying a lubricating medium, wherein the device is designed such that a pressure chamber can be acted upon pressure chamber is provided as the test environment, in which the test specimen on the holding device and in operative connection with the other basic components can be arranged.
  • liquid lubricant can be compensated by the variable internal pressure in the pressure chamber and evaporation of the lubricant can be minimized.
  • the device according to the invention for tribological testing advantageously the formation of an explosive gas-air mixture can be prevented, wherein the pressure chamber for reducing the content of oxygen, in which vapors of a combustible medium can distribute, for. B. can be completely filled with liquid and the use of nitrogen or carbon dioxide to fill a non-liquid occupied volume of the interior of the pressure chamber is possible.
  • the device according to the invention thus represents a tribometer, which is designed to test each type of test specimen under real load spectra, ie its load when used in the product. It has been found that the proposed device is particularly suitable for the tribological testing of high-pressure generating components, in particular in motor vehicles. Since even the highest explosion protection requirements can be met by the proposed device, the use of easily combustible media is possible. Hereby, the device according to the invention is also suitable for testing of and with operating materials, in particular media for
  • Model test specimens and original components of diesel and petrol high-pressure injection pumps and injectors can be optimized with regard to the materials used and the behavior in fuels such.
  • all basic components of the device according to the invention d. H. in particular, the holding device, the drive device and the load generating device, are arranged in the sealed pressure chamber.
  • a sensor device such. B. a force sensor
  • the test body can be coupled to the holding device via the force sensor in such an embodiment.
  • Another, particularly favorable variant of the present invention can provide that certain basic components or other components, preferably components with sensitive electronic devices, are arranged outside the pressure chamber, so that any necessary protective measures, eg. B. to protect against contact with the lubricating medium, before entering the corresponding component or to meet explosion protection requirements, can be omitted in the aforementioned components.
  • any necessary protective measures eg. B. to protect against contact with the lubricating medium, before entering the corresponding component or to meet explosion protection requirements
  • the drive device and the load generating device and sensitive sensors may be particularly expedient to arrange the drive device and the load generating device and sensitive sensors outside the pressure chamber.
  • Load generating device are guided in each case with a sealed passage in the interior of the pressure chamber.
  • special, sealing bearings can be used in the motion transmission path and also in the load transmission path, so that a
  • a further embodiment of the invention provides that the drive device comprises an electric motor or the like, wherein a motion transmission path can be provided in which a rotational movement of the electric motor is preferably converted via an eccentric and a lifting rod in an approximately linear movement.
  • the test specimen and the counter body can be moved relatively linearly to each other or to the lubricating medium.
  • Load generating device comprises a Spindelhubgetriebe or the like, which is coupled to a power piston which acts on the holding body with a predetermined force on the test body or the counter body.
  • a normal force in the order of z. B. 10,000 N or less or higher.
  • other elements are conceivable in order to realize the load introduction path and to transmit the force to the test specimen.
  • a sensor device for detecting z. B. wear-dependent parameters, which may be conveniently located outside the pressure chamber is z .B. a force sensor which has a rod element or other transfer means for detecting a friction force, normal force and / or lubricant gap width occurring on the test specimen.
  • the rod member can be guided through a specially sealed storage through a passage of a container wall of the pressure chamber, so that no pressure loss through a leakage in the passage through the pressure chamber wall may occur.
  • a part of the sensor elements which are not resistant to the medium in the pressure chamber or which are not explosion-proof can also be arranged outside the pressure chamber and a part of correspondingly protected sensor elements can be arranged inside the pressure chamber.
  • a possible embodiment of the present invention may further provide a tempering device arranged in particular on the holding device for tempering the test body and / or the medium. In this way, the interior of the pressure chamber and the test specimen can be heated or cooled.
  • the tempering device serves as a heater, which z. B. is equipped with a heating cartridge or the like, this is suitably designed so that media temperatures of about 250 ° C or lower or higher in the pressure chamber of the device according to the invention are readily possible.
  • Figure 1 is a schematic three-dimensional view of an advantageous embodiment of a device according to the invention for tribological testing
  • Figure 2 is a sectional partial view of Figure 1; and Figure 3 is a block diagram of the device according to the invention.
  • FIGS. 1 to 3 schematically show a device 1 according to the invention for tribological testing of a test specimen, which is held on a table-like frame 10.
  • the device 1 has a drive device 2 which comprises an electric motor 20 whose rotational movements are transmitted via a motion transmission path to a counter body 30 to be moved relative to a test body 3.
  • the motion transmission path is provided with an eccentric 4 and a lifting rod 5, whereby an approximately linear movement is transmitted to the test body 3.
  • the drive device 2 at a frequency of about ⁇ 100 Hz cause an amplitude of ⁇ lOmm on the test piece 3.
  • a holding device 6 for holding the test body 3 and the counter body 30 is provided.
  • the holding device 6 is shown in more detail in particular in Figures 2 and 3 and has an upper für Eisennähme 7 and a lower für Eisennähme 8. To transmit the movement of the lifting rod 5 on the test specimen 3, the lifting rod 5 is coupled to the upper für Eisennähme 7.
  • a load generating device 9 For applying a predetermined load on the test specimen 3 or the counter body 30 for wear testing, a load generating device 9 is provided as a further component.
  • the load generating device 9 comprises a screw jack 31, which is coupled to a power piston 11, which is a Normal force of about 10,000 N on the holding device 6 applies.
  • the power piston 11 is in turn coupled to the holding device 6, so that z. B. is held by the holding device 6 counter body 30 is acted upon by the predetermined force.
  • test body 3 and the counter body 30 are arranged with the holding device 6 in a test chamber forming the test environment 15.
  • an opening into the pressure chamber 15 feeder 12 is provided.
  • the feeder 12 z. B. from a container 13, the lubricating medium via a diaphragm pump 14 in the intended as a test environment pressure chamber 15 perform.
  • the diaphragm pump 14 may be followed by a check valve 16, a medium filter 17 and a 2-way ball valve 18, wherein the arrangement order can be varied.
  • all sensitive components such as the drive drive device 2, the load generating device 9 and certain sensor devices are provided outside the pressure chamber 15, while not further designated, protected sensor devices are arranged at least partially in the pressure chamber 15 ,
  • FIG. 3 shows from the basic diagram that a force sensor 19 is provided at least partially in the interior of the pressure chamber 15.
  • the force sensor 19 serves in this way as a coupling member between a power piston 11 of the load generating device 9 and the holding device. 6
  • the coupled to the Spindelhubgetriebe 31 power piston 11 of the load generating device 9 has for temperature control, in particular of the test specimen 3, a tempering device 32 in the form of a heating cartridge and a temperature sensor 21 for controlling the temperature.
  • a cleaning drain 22 is provided on the power piston 11 for discharging the medium located in the pressure chamber 15, wherein the cleaning drain 22 connects the pressure chamber 15 with a collecting container 23.
  • a 3-way ball valve 24 and an overflow valve 25 are provided in the cleaning outlet 22 in the present case.
  • Motion transmission path of the drive device 1 in the region of the lifting rod 5, a vibration measuring system 26 for detecting the amplitude of the lifting rod 5 have.
  • the sensor device further comprises a pressure sensor 29 for sensing the internal pressure arranged outside the pressure chamber 15, wherein the sensor is guided into the pressure chamber 15.
  • a nitrogen container 33 is further connected via a check valve 34 and a further valve 35 to the interior of the pressure chamber 15. In this way, at a high oxygen content flooding of the pressure chamber 15 with z.
  • the oxygen sensor 36 may include a sensor, which is also located in the interior of the pressure chamber 15.
  • the device 1 shown for tribological testing of the test specimen 3 is in the figures as so-called

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

Dispositif d'essai tribologique d'un corps à tester (3), qui comporte en tant que constituants de base un dispositif de retenue (6) destiné à retenir le corps à tester (3), un dispositif d'entraînement (2) destiné à produire un mouvement relatif entre le corps à tester (3) et un corps opposé (30), un dispositif de production de charge (9) destiné à exercer une charge prédéterminée sur le corps à tester (3) et un dispositif d'introduction (12) pour l'introduction d'un lubrifiant. L'environnement d'essai est constitué par une chambre à pression (15) dans laquelle règne une surpression et dans laquelle le corps à tester (3) peut être fixé au dispositif de retenue (6) et placé en coopération active avec les autres constituants de base (2, 9).
PCT/EP2005/054101 2004-09-29 2005-08-19 Dispositif d'essai tribologique d'un corps a tester dans une chambre a pression soumise a une surpression WO2006034929A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004047106.1 2004-09-29
DE200410047106 DE102004047106A1 (de) 2004-09-29 2004-09-29 Vorrichtung zur tribologischen Prüfung eines Prüfkörpers

Publications (1)

Publication Number Publication Date
WO2006034929A1 true WO2006034929A1 (fr) 2006-04-06

Family

ID=35645643

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/054101 WO2006034929A1 (fr) 2004-09-29 2005-08-19 Dispositif d'essai tribologique d'un corps a tester dans une chambre a pression soumise a une surpression

Country Status (2)

Country Link
DE (1) DE102004047106A1 (fr)
WO (1) WO2006034929A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8151625B2 (en) 2006-05-12 2012-04-10 Ematec Consulting Gmbh Test device for tribological examination of materials
CN105510672A (zh) * 2015-11-26 2016-04-20 中国工程物理研究院化工材料研究所 实时在线安全测定炸药摩擦起电电压值的方法
US20230280252A1 (en) * 2022-03-07 2023-09-07 Rolls-Royce Plc System and method for testing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011082932A1 (de) * 2011-09-19 2013-03-21 Sms Siemag Ag Vorrichtung zur Messung zumindest einer tribologischen Größe einer Probe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939690A (en) * 1973-04-18 1976-02-24 Edward Kuss Device for measuring friction and wear under surrounding high pressure
US4311036A (en) * 1977-12-10 1982-01-19 Politechnika Swietokrzyska Method and device for testing lubricating properties of lubricating means
EP0297643A1 (fr) * 1987-07-02 1989-01-04 SKF Industrial Trading & Development Co, B.V. Procédé et dispositif d'essai des propriétés d'usure et de frottement de matériaux soumis à des frottements par glissement
US5281535A (en) * 1992-06-30 1994-01-25 Ronghua Wei Method and apparatus for testing parts and materials in a controlled environment such as an atomic oxygen atmosphere
US6070456A (en) * 1998-12-11 2000-06-06 Caterpillar Inc. Apparatus for evaluating fuel lubricity at elevated pressure conditions
US6546782B1 (en) * 2000-09-25 2003-04-15 Southwest Research Institute High temperature pressurized high frequency testing rig and test method
US20030101793A1 (en) * 2001-11-30 2003-06-05 Evans Paul R. Machine for testing wear, wear-preventative and friction properties of lubricants and other materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370606A (en) * 1943-06-10 1945-02-27 Cities Service Oil Co Apparatus for testing lubricants

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939690A (en) * 1973-04-18 1976-02-24 Edward Kuss Device for measuring friction and wear under surrounding high pressure
US4311036A (en) * 1977-12-10 1982-01-19 Politechnika Swietokrzyska Method and device for testing lubricating properties of lubricating means
EP0297643A1 (fr) * 1987-07-02 1989-01-04 SKF Industrial Trading & Development Co, B.V. Procédé et dispositif d'essai des propriétés d'usure et de frottement de matériaux soumis à des frottements par glissement
US5281535A (en) * 1992-06-30 1994-01-25 Ronghua Wei Method and apparatus for testing parts and materials in a controlled environment such as an atomic oxygen atmosphere
US6070456A (en) * 1998-12-11 2000-06-06 Caterpillar Inc. Apparatus for evaluating fuel lubricity at elevated pressure conditions
US6546782B1 (en) * 2000-09-25 2003-04-15 Southwest Research Institute High temperature pressurized high frequency testing rig and test method
US20030101793A1 (en) * 2001-11-30 2003-06-05 Evans Paul R. Machine for testing wear, wear-preventative and friction properties of lubricants and other materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8151625B2 (en) 2006-05-12 2012-04-10 Ematec Consulting Gmbh Test device for tribological examination of materials
CN105510672A (zh) * 2015-11-26 2016-04-20 中国工程物理研究院化工材料研究所 实时在线安全测定炸药摩擦起电电压值的方法
US20230280252A1 (en) * 2022-03-07 2023-09-07 Rolls-Royce Plc System and method for testing

Also Published As

Publication number Publication date
DE102004047106A1 (de) 2006-04-06

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