EP4285040A1 - Amortisseur à fluide de véhicule ferroviaire comportant un capteur et procédé de surveillance dudit amortisseur à fluide - Google Patents

Amortisseur à fluide de véhicule ferroviaire comportant un capteur et procédé de surveillance dudit amortisseur à fluide

Info

Publication number
EP4285040A1
EP4285040A1 EP22708302.9A EP22708302A EP4285040A1 EP 4285040 A1 EP4285040 A1 EP 4285040A1 EP 22708302 A EP22708302 A EP 22708302A EP 4285040 A1 EP4285040 A1 EP 4285040A1
Authority
EP
European Patent Office
Prior art keywords
reference piece
rail vehicle
fluid damper
pressure
sensor
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.)
Pending
Application number
EP22708302.9A
Other languages
German (de)
English (en)
Inventor
Gerhard Grobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydrostat Engineering and Konstruktion GmbH
Original Assignee
Hydrostat Engineering and Konstruktion 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 Hydrostat Engineering and Konstruktion GmbH filed Critical Hydrostat Engineering and Konstruktion GmbH
Publication of EP4285040A1 publication Critical patent/EP4285040A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3292—Sensor arrangements
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/24—Detecting or preventing malfunction, e.g. fail safe
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms

Definitions

  • the application relates to a rail vehicle fluid damper with the features in the preamble of claim 1.
  • the present invention further relates to a method for monitoring the pressure in a rail vehicle fluid damper according to the features in claim 10.
  • dampers it is known to attach dampers to the front or end of rail vehicles, so that when two rail vehicles are coupled, the rail vehicles weighing several tons can be struck without being destroyed.
  • Flierzu dampers are arranged in a slight impact of a rail vehicle to another absorb and dampen the forces generated by the rail vehicle. Such dampers are also called buffers.
  • dampers depending on the design of the couplings formed between two rail vehicles, can be to maintain the distance between two rail vehicles that changes dynamically during operation. This occurs in particular when cornering and/or at different heights.
  • dampers are prestressed and therefore also have spring properties.
  • a generic damper is known for example from DE 20 2019 102 118 U1.
  • damper In long-term operation, such a damper can be subject to signs of wear and tear.
  • the damping properties can also differ due to different climatic conditions, in particular strong temperature fluctuations with a temperature delta of more than 30 ° C.
  • the aforementioned object is achieved in a rail vehicle fluid damper with the features in claim 1 .
  • a procedural part of the task is solved with the features in claim 10 .
  • the rail vehicle fluid damper has an inner container in which a guide bearing is arranged at the head.
  • the container is in particular of cylindrical design.
  • the rail vehicle fluid damper has a piston which is coupled to a piston rod.
  • the piston rod reaches through the guide bearing and the piston itself has a plate-shaped head, with which it can be driven into the container.
  • In the container itself there is a fluid medium which is under static prestress and which is present in particular in the liquid state of aggregation.
  • the rail vehicle fluid damper is characterized in that a reference piece that is in direct contact with the fluid medium is arranged in the container.
  • the reference piece is particularly preferably arranged in a floating manner in the container.
  • a sensor is coupled to or on the reference piece itself in such a way that the pressure of the fluid medium can be measured.
  • a change in pressure either when the damper is not in use due to a change in the external climatic conditions, in particular the temperature, and/or a change in pressure due to dynamic loads during operation of the damper, also affects the pressure change on the container, the piston and the seals off. Due to the fact that the reference piece is in direct contact with the fluid medium, the change in pressure of the fluid medium also causes a respective change in shape of the reference piece. According to the invention, the change in shape of the reference piece is measured by the sensor.
  • the reference piece itself is calibrated and/or configured in terms of its geometric dimensions in such a way that, according to a conversion formula and/or a stored matrix, it uses the measured values of the change in shape of the reference piece via a conversion formula and/or a stored matrix to draw conclusions about the pressure and thus the condition of the entire damper, in particular the housing and/or the seals of the damper.
  • This application is particularly suitable for dampers in rail vehicles that are used as so-called clutch dampers during operation.
  • rail vehicles also have dampers that are used as impact absorbers. These are arranged at the front or end and installed in a manner comparable to the principle of a bumper in motor vehicles.
  • impact absorbers have the sole purpose of reducing the impact in the event of an impact and reducing the crash energy that occurs as a result of retracting the impact absorber.
  • the present monitoring method is particularly important for such impact absorbers particularly useful, since the impact absorbers are sometimes not operated for years, but the pressure condition in the absorber can always be measured without a doubt using the measuring method according to the invention.
  • the senor is in particular a strain gauge.
  • a piezoelectronic sensor can also be used as an alternative to the strain gauge.
  • Such a piezoelectronic sensor is particularly suitable for use in a hollow body.
  • the reference piece is very particularly preferably a reference disk.
  • the reference piece can thus very particularly preferably be arranged on the bottom side in the container.
  • the sensor itself is also preferably arranged on a pressure-remote side of the reference piece.
  • the reference piece also particularly preferably has a seal coupled to it.
  • the sensor is arranged on the reference piece on the side facing away from the pressure, such that the sensor is not in contact with the fluid medium.
  • Both the sensor itself, which is in particular a strain gauge, and lines coupled to the sensor, as well as any integrated sensor electronics and/or energy source of the sensor, are therefore themselves not exposed to the pressure of the fluid medium.
  • the reference piece is also particularly preferably held in a form-fitting manner, but in at least one degree of freedom in a floating manner in the housing.
  • a stop is also preferably provided in the container, with a support screw facing away from the pressure side then enclosing the reference piece between the stop or holder and the support screw in a form-fitting manner.
  • the reference piece can then also have a plurality of seals.
  • the reference piece can have a depression or a recess on its pressure-facing side.
  • the change in shape of the reference piece when the pressure of the fluid medium changes can thus be recorded in a reference-safe manner.
  • a second significant advantage is the fact that despite the fluid medium and a correspondingly high pressure that occurs, the sensor technology allows direct measurement in almost immediate contact with the pressure medium.
  • the damper has an initial static force of the pressurized fluid medium when the piston begins to depress of at least 100 kN.
  • the present invention further relates to a method for performing pressure monitoring in a rail vehicle fluid damper.
  • the method is characterized in that a change in pressure causes a change in the shape of the reference piece, with the change in shape of the reference piece being detected by the sensor and the pressure being evaluated or converted via sensor electronics.
  • the sensor electronics can be integrated into the sensor itself. However, it can also be positioned separately, for example by cable, on or from the damper.
  • the sensor electronics itself can then send signals, for example also wirelessly, to a control station.
  • a measured value can also be recorded at predetermined intervals in an extremely energy-saving manner.
  • a respective sensor can then be checked or the data can be read out with an evaluation unit.
  • FIGS. 3 and 4 show a second embodiment variant with a reference piece in the area of the guide bearing
  • FIGS. 5 and 6 show a third variant with a reference piece in the plate-shaped head of the piston
  • Figure 7 and 8 a fourth embodiment variant of the fluid damper according to the invention.
  • Figure 9 and 10 a fifth embodiment variant of the fluid damper with a floating body in the bottom of the damper.
  • Figure 1 shows a rail vehicle fluid damper 1 according to the invention, having a housing 2 and a piston 3 moving into the housing 2.
  • the piston 3 itself has a piston rod 4 and a plate-shaped head 5.
  • the piston 3 is connected via a guide bearing 6, for example in Coupled in the form of a screw-in guide bearing 6 in the housing 2 or in an interior space of the housing 2 is a fluid medium 7 which is statically prestressed. If the piston 3 now moves into the housing 2 in order to carry out a damping process, the pressure of the fluid medium 7 changes.
  • a reference piece 9 in the form of a reference disk 9 is arranged in a base 8 of the housing.
  • the reference disk 9 is in direct contact with the fluid medium 7.
  • the reference disk 9 is pressed against an underside of the base 8 by a support screw 10, with the reference disk 9 being mounted essentially in a floating manner, in particular floating in its radial direction R , is trained.
  • a pressure change in the fluid medium 7 thus acts directly on the reference disk 9 and causes a change in shape of the reference disk 9.
  • An enlarged view is shown in FIG Reference disk 9.
  • the reference disk 9 has a depression 12 on its pressure-facing side.
  • respective seals 14, in particular in the form of O-rings are arranged.
  • a radially circumferential seal 14 can also be additionally provided.
  • a sensor 15, in particular in the form of a strain gauge (DMS), is arranged on the side facing away from the pressure, ie on the back. This is coupled to sensor electronics 17 via a cable 16 .
  • the sensor electronics 17 can also be an energy source or a wireless sensor or, for example, a wired connection in the form of a USB connection or other data readout option.
  • the sensor 15 on the reference piece 9 can then measure the change in shape of the reference piece 9 itself. He passes this on to the sensor electronics 17, where, for example, the measured values can be stored or they can be passed on to a further external evaluation unit.
  • Figure 2b shows the force acting on the reference disk 9 in a greatly exaggerated manner.
  • the force F results from the formula pressure times area and leads to a deformation of the reference disk 9.
  • the strain gauge arranged on the back of the reference disk 9 also experiences a deformation or deformation. Change in length due to the deformation of the reference disk 9, which is shown greatly exaggerated. It is thus possible to use a mathematical conversion formula, a stored characteristic curve or a stored matrix to convert the measured deformation of the reference disk 9 in order to draw conclusions about the pressure prevailing in the damper 1.
  • the reference disk 9 is produced in particular from a metallic material, in particular from a steel material.
  • the reference disc 9 can also be made of a heat-treated steel, for example 1.6580 - 30 CrNiMo 8.
  • the selection of the material depends in particular on the material of the housing of the damper 1.
  • the reference disc 9 should either be made of the same material as the housing.
  • the reference disk should have a tensile strength Rm of at least 80 to 90 percent of the tensile strength Rm of the housing material. Thus, the requirement of elastic deformation can be secured.
  • the operating data can also be analyzed in more detail. Extensive recordings of the system behavior, e.g. how often the damper was started, what are the operating conditions over the course of the route, working frequency of the buffer, etc..
  • the compression values recorded in sensor electronics can be adjusted or upgraded in practice, after which a detailed The damper is evaluated. This can be done manually afterwards, but also automatically, so that the sensor electronics are designed to be self-learning and then in turn store more detailed analysis data.
  • the monitoring system provides insights that are becoming increasingly important, especially for operation with automatic railways - as well as the driverless railway systems that are being used more and more frequently. It must be possible for systems to control themselves in order to avoid serious errors for people and technology. Our system is ideally suited for this.
  • Figures 3 and 4 show a second embodiment of the present invention.
  • the damper 1 is also in turn designed with a container.
  • the reference piece 9 itself is arranged on the bottom side, with the reference piece 9 being inserted into the guide bearing 6 of the container 2, in particular as shown in Figure 4.
  • the reference piece 9 is in contact with the fluid medium 7 via a channel 18, so that in turn a change in the pressure of the Fluid medium 7 leads to a deformation of the reference piece 9.
  • Figures 5 and 6 show a third embodiment of the present invention.
  • a damper 1 with a housing 2 is also formed here.
  • the reference piece 9 is also arranged in the housing 2 here, but not in direct contact with the housing, but in the plate-shaped head 5 of the piston 3.
  • the enlarged view according to Figure 6 shows that the plate-shaped head 5 of the Piston 3 is designed in two parts, such that a floating mounting of the reference piece 9 is possible.
  • a part of the plate-shaped head 5 thus serves as a support screw 10 and a front part 19 of the head 5 serves as a counter bearing or abutment.
  • the reference piece 9 is kept floating within the head 5.
  • the sensor electronics 17 are coupled to an evaluation unit via a cable 16 .
  • FIGS. 7 and 8 show a further embodiment variant of the present invention. Essentially, this is analogous to the design variant of FIGS. 1 and 2 with regard to the placement and the basic structure of the container of the damper 1. The difference, however, is a special manufacturing feature.
  • a holding body 20 is formed, which is arranged on the bottom side in the container.
  • the reference piece 9 is then placed in the holding body 20 analogously to the principle of the variant embodiment of FIGS.
  • a through hole 21 can first be made here, in which the holding body 20 and the support screw 10 are then arranged.
  • the holding body 20 can have a T-shaped cross section, as shown, and can rest on the pressure inside facing the fluid medium 7 with a stepped shoulder.
  • Figure 9 and 10 show an alternative embodiment variant of the present invention.
  • the holding body 20 itself is designed as a hollow body 22 which is designed to engage in the pressure chamber of the fluid medium 7 or the interior of the container.
  • the sensor 15 itself can be arranged not only on the bottom side, but also on a lateral surface.
  • the hollow body is thus the reference piece 9 itself.
  • a change in the pressure of the fluid medium 7 also changes the shape of the hollow body 22, which acts as a reference piece 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un amortisseur à fluide de véhicule ferroviaire et un procédé de surveillance dudit amortisseur à fluide, une pièce de référence (9) étant placée à l'intérieur d'un boîtier (2) de l'amortisseur (1), et la déformation de la pièce de référence (9) étant mesurée, et une conclusion pouvant être tirée au sujet du changement de pression, ce qui permet de surveiller une pression du milieu fluide (7) dans le boîtier (2).
EP22708302.9A 2021-03-30 2022-02-28 Amortisseur à fluide de véhicule ferroviaire comportant un capteur et procédé de surveillance dudit amortisseur à fluide Pending EP4285040A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021108106.8A DE102021108106A1 (de) 2021-03-30 2021-03-30 Schienenfahrzeug Fluid Dämpfer mit Sensor sowie Verfahren zu dessen Überwachung
PCT/DE2022/100165 WO2022207033A1 (fr) 2021-03-30 2022-02-28 Amortisseur à fluide de véhicule ferroviaire comportant un capteur et procédé de surveillance dudit amortisseur à fluide

Publications (1)

Publication Number Publication Date
EP4285040A1 true EP4285040A1 (fr) 2023-12-06

Family

ID=80682896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22708302.9A Pending EP4285040A1 (fr) 2021-03-30 2022-02-28 Amortisseur à fluide de véhicule ferroviaire comportant un capteur et procédé de surveillance dudit amortisseur à fluide

Country Status (3)

Country Link
EP (1) EP4285040A1 (fr)
DE (1) DE102021108106A1 (fr)
WO (1) WO2022207033A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013826A (en) * 1978-02-02 1979-08-15 Armstrong Patents Co Ltd Sealing hydropneumatic shock absorbers
DE4234290C2 (de) 1992-10-12 1995-06-14 Fibronix Sensoren Gmbh Drucksensor
JPH10141417A (ja) * 1996-11-05 1998-05-29 Fuji Seiki Co Ltd ショックアブソーバ
US6334516B1 (en) * 2000-04-27 2002-01-01 Edelbrock Acceleration sensitive twin tube shock absorber
US20060219505A1 (en) * 2005-03-31 2006-10-05 Zdeb David T Shock absorber including supplemental friction generating device
KR102032050B1 (ko) * 2018-04-04 2019-10-15 주식회사 한진기공 성형장비용 가스 스프링
DE202019102118U1 (de) 2019-04-12 2019-05-20 Hydrostat Engineering + Konstruktion GmbH Hydrostatischer Dämpfer
EP3760893A1 (fr) * 2019-07-03 2021-01-06 Soletanche Freyssinet Système de surveillance d'un dispositif d'amortissement
CN110864829A (zh) * 2019-11-28 2020-03-06 浙江盾安轨道交通设备有限公司 一种压力检测装置、系统和减振器

Also Published As

Publication number Publication date
WO2022207033A1 (fr) 2022-10-06
DE102021108106A1 (de) 2022-10-06

Similar Documents

Publication Publication Date Title
EP2981796B1 (fr) Dispositif de mesure de forces
DE1775663A1 (de) Schwingungsdaempfer,insbesondere mit einer zwischen Kolbenstangenende und Zylinder eingespannten Schraubenfeder
DE10110878A1 (de) Luftfeder mit einem Höhensensor
DE2721890A1 (de) Hydraulische stossbremse fuer rohrleitungssysteme
EP2828601B1 (fr) Dispositif pour la génération de mouvements de battement ou de pulsation dans des parois tubulaires
EP1219942B1 (fr) Indicateur de pression
EP3539841A1 (fr) Dispositif d'amortissement de forces de compression
EP4285040A1 (fr) Amortisseur à fluide de véhicule ferroviaire comportant un capteur et procédé de surveillance dudit amortisseur à fluide
EP2404078B1 (fr) Système d'amortissement pour amortissement de butée
DE1809135C3 (fr)
DE102009056547A1 (de) Vorrichtung zum Längen- und/oder Lastausgleich zwischen mindestens zwei Tragmitteln
DE102019100687B4 (de) Keiltriebwerkzeug
DE102008031063B4 (de) Anordnung zur Bremskraftmessung
CH265703A (de) Puffer an Schienenfahrzeugen.
DE102006057258B4 (de) Torsionsunanfälliger Kraftaufnehmer mit Steg in Zentralöffnung
DE102016121569A1 (de) Verfahren zur Kontrolle des Bremsbelagverschleißes einer Gleitsattel-Scheibenbremse
DE102009017352A1 (de) Federbein für Radaufhängung von Kraftfahrzeugen
DE102008005293B4 (de) Überlastanzeige an Schwingungsdämpfern
EP1184251A1 (fr) Dispositif élastique de tamponnement et/ou de traction pour véhicules ferroviaires
DE3513294C2 (fr)
DE202005007349U1 (de) Gasfeder sowie Sicherheitseinrichtung im Bereich einer mechanischen Vorrichtung zum Heben und Absenken eines Nutzfahrzeugaufbaus
DE102005063308A1 (de) Sicherheitseinrichtung
DE102019134955B4 (de) Einspritzvorrichtung einer Spritzgießmaschine
EP3771611B1 (fr) Tampon plongeur à marquage
EP2848907B1 (fr) Manomètre à ressort tubulaire avec amortissement de choc

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230830

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)