RU2014148712A - HYDROCYLINDER WITH MEASURING SYSTEM FOR DETERMINING PISTON POSITION AND METHOD FOR DETECTING LEAK THROUGH SEAL IN A HYDROCYLINDER - Google Patents

HYDROCYLINDER WITH MEASURING SYSTEM FOR DETERMINING PISTON POSITION AND METHOD FOR DETECTING LEAK THROUGH SEAL IN A HYDROCYLINDER Download PDF

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Publication number
RU2014148712A
RU2014148712A RU2014148712A RU2014148712A RU2014148712A RU 2014148712 A RU2014148712 A RU 2014148712A RU 2014148712 A RU2014148712 A RU 2014148712A RU 2014148712 A RU2014148712 A RU 2014148712A RU 2014148712 A RU2014148712 A RU 2014148712A
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RU
Russia
Prior art keywords
piston
hydraulic cylinder
cavity
seal
cylinder according
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RU2014148712A
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Russian (ru)
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RU2681556C2 (en
RU2014148712A3 (en
Inventor
Бернхард АРНОЛЬД
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Роберт Бош Гмбх
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Publication of RU2014148712A publication Critical patent/RU2014148712A/en
Publication of RU2014148712A3 publication Critical patent/RU2014148712A3/ru
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005Fault detection or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20Other details, e.g. assembly with regulating devices
    • F15B15/28Means for indicating the position, e.g. end of stroke
    • F15B15/2815Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2884Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using sound, e.g. ultrasound
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1447Pistons; Piston to piston rod assemblies
    • F15B15/1452Piston sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/63Electronic controllers
    • F15B2211/6303Electronic controllers using input signals
    • F15B2211/6343Electronic controllers using input signals representing a temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Claims (14)

1. Гидроцилиндр с измерительной системой для определения положения подвижно установленного в нем поршня (2), имеющий первую полость (10) и отделенную от нее поршнем (2) вторую полость (12) и ультразвуковой датчик (4) для излучения и приема ультразвуковых волн (24, 26), отличающийся тем, что в первой полости преобладает в основном постоянное давление, а определение положения поршня (2) с помощью ультразвукового датчика (4) возможно через первую полость (10) гидроцилиндра (1).1. A hydraulic cylinder with a measuring system for determining the position of a piston (2) movably mounted in it, having a first cavity (10) and a second cavity (12) separated by a piston (2) and an ultrasonic sensor (4) for emitting and receiving ultrasonic waves ( 24, 26), characterized in that mainly constant pressure prevails in the first cavity, and the determination of the position of the piston (2) using an ultrasonic sensor (4) is possible through the first cavity (10) of the hydraulic cylinder (1). 2. Гидроцилиндр по п. 1, отличающийся тем, что первая полость (10) сообщается через отверстие (6) с атмосферой.2. The hydraulic cylinder according to claim 1, characterized in that the first cavity (10) communicates through the hole (6) with the atmosphere. 3. Гидроцилиндр по п. 1, отличающийся тем, что излучение ультразвуковых волн (24) возможно таким образом, что они распространяются в первой полости (10) гидроцилиндра (1) в направлении поршня (2).3. The hydraulic cylinder according to claim 1, characterized in that the emission of ultrasonic waves (24) is possible in such a way that they propagate in the first cavity (10) of the hydraulic cylinder (1) in the direction of the piston (2). 4. Гидроцилиндр по п. 1, отличающийся тем, что ультразвуковой датчик (4) расположен в днище (8) первой полости (10).4. The hydraulic cylinder according to claim 1, characterized in that the ultrasonic sensor (4) is located in the bottom (8) of the first cavity (10). 5. Гидроцилиндр по п. 1, отличающийся тем, что с помощью измерительной системы для определения положения поршня возможно выявление утечки через уплотнение (14) поршня и/или уплотнение (16) его штока.5. The hydraulic cylinder according to claim 1, characterized in that using a measuring system to determine the position of the piston, leakage can be detected through the seal (14) of the piston and / or the seal (16) of its rod. 6. Гидроцилиндр по п. 1, отличающийся тем, что предусмотрен датчик температуры для измерения температуры воздуха в первой полости (10).6. The hydraulic cylinder according to claim 1, characterized in that a temperature sensor is provided for measuring air temperature in the first cavity (10). 7. Гидроцилиндр по п. 6, отличающийся тем, что датчик температуры интегрирован в ультразвуковой датчик (4).7. The hydraulic cylinder according to claim 6, characterized in that the temperature sensor is integrated in the ultrasonic sensor (4). 8. Гидроцилиндр по одному из пп. 1-7, отличающийся тем, что предусмотрено вычислительное устройство для вычисления положения поршня (2) на основании промежутка времени, проходящего от момента излучения ультразвуковых волн (24) до момента приема отраженных от поршня (2) ультразвуковых волн (26).8. The hydraulic cylinder according to one of paragraphs. 1-7, characterized in that a computing device is provided for calculating the position of the piston (2) based on the period of time elapsing from the moment of emission of ultrasonic waves (24) to the moment of receiving ultrasonic waves reflected from the piston (2) (26). 9. Гидроцилиндр по п. 1, отличающийся тем, что он представляет собой дифференциальный цилиндр (1), у которого шток (18) его поршня проходит через вторую полость (12).9. The hydraulic cylinder according to claim 1, characterized in that it is a differential cylinder (1), in which the piston rod (18) of it passes through the second cavity (12). 10. Гидроцилиндр по п. 1, отличающийся тем, что он для перемещения подвесных грузов ориентирован в основном вертикально.10. The hydraulic cylinder according to claim 1, characterized in that it is oriented vertically for moving suspended loads. 11. Способ выявления утечки через уплотнительный элемент гидроцилиндра (1) по одному из пп. 1-10, отличающийся тем, что поршень (2) перемещают в механически ограниченное конечное положение, в котором объем первой полости (10) максимален, определяют положение поршня и сравнивают фактически определенное положение поршня с его исходным положением и/или вторую полость (12) через ведущий в нее соединительный элемент (20) для присоединения гидролинии (22) заполняют рабочей средой, перекрывают подсоединенную ко второй полости (12) гидролинию (22) и определяют положение поршня на протяжении заданного промежутка времени.11. A method for detecting leaks through the sealing element of the hydraulic cylinder (1) according to one of paragraphs. 1-10, characterized in that the piston (2) is moved to a mechanically limited end position in which the volume of the first cavity (10) is maximum, the position of the piston is determined and the actually determined position of the piston is compared with its initial position and / or the second cavity (12) through the connecting element (20) leading to it, for connecting the hydraulic line (22), fill the working medium, close the hydraulic line (22) connected to the second cavity (12) and determine the position of the piston for a predetermined period of time. 12. Способ по п. 11, отличающийся тем, что наличие утечки через уплотнение (14) поршня констатируют в случае, если при сравнении фактически определенного положения поршня с его исходным положением выявлено несоответствие между этими положениями.12. The method according to p. 11, characterized in that the presence of leakage through the seal (14) of the piston is ascertained if, when comparing the actually determined position of the piston with its initial position, a mismatch between these positions is revealed. 13. Способ по п. 11, отличающийся тем, что к штоку (18) поршня гидроцилиндра (1) прикрепляют груз.13. The method according to p. 11, characterized in that the load is attached to the piston rod (18) of the hydraulic cylinder (1). 14. Способ по одному из пп. 11-13, отличающийся тем, что наличие утечки через уплотнение (14) поршня и/или уплотнение (16) его штока констатируют в том случае, если положение поршня изменяется на протяжении заданного промежутка времени.14. The method according to one of paragraphs. 11-13, characterized in that the presence of leakage through the seal (14) of the piston and / or the seal (16) of its rod is ascertained if the position of the piston changes over a predetermined period of time.
RU2014148712A 2013-12-04 2014-12-03 Hydraulic cylinder with measuring system for determining piston position and method for detecting leak through seal in hydraulic cylinder RU2681556C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013224819.9 2013-12-04
DE102013224819.9A DE102013224819A1 (en) 2013-12-04 2013-12-04 Hydraulic cylinder with measuring system for determining the position of a piston and method for detecting a seal leakage on a hydraulic cylinder

Publications (3)

Publication Number Publication Date
RU2014148712A true RU2014148712A (en) 2018-02-22
RU2014148712A3 RU2014148712A3 (en) 2018-07-27
RU2681556C2 RU2681556C2 (en) 2019-03-11

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DE (1) DE102013224819A1 (en)
RU (1) RU2681556C2 (en)

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RU2708915C1 (en) * 2019-07-03 2019-12-12 федеральное государственное бюджетное образовательное учреждение высшего образования "Кузбасский государственный технический университет имени Т.Ф. Горбачева" (КузГТУ) Method of hydraulic cylinder deformation under load with hinge supports of rod and cylinder
US20220042836A1 (en) 2020-08-07 2022-02-10 Woodward, Inc. Ultrasonic Flow Meter Flow Control
WO2022197321A1 (en) 2021-03-17 2022-09-22 Woodward, Inc. Ultrasonic mass fuel flow meter
DE102021208743A1 (en) 2021-08-11 2023-02-16 Herbert Hänchen GmbH Method for detecting a leakage of hydraulic medium
WO2023183467A1 (en) * 2022-03-25 2023-09-28 Woodward, Inc. Ratio metric position sensor and control system

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SU1278496A1 (en) * 1984-11-02 1986-12-23 Научно-Исследовательский Институт Интроскопии Hydraulic cylinder with position pickup
JP2001063986A (en) 1999-08-27 2001-03-13 Toyota Autom Loom Works Ltd Position detecting device and method for fluid pressure cylinder
DE10201922A1 (en) * 2002-01-19 2003-07-31 Linde Ag Device for determining the stroke of a hydraulic lifting cylinder, e.g. for an industrial truck or forklift, by injection of noise into the cylinder and frequency analysis of the resultant sound to determine the cylinder stroke
DE102009032897B4 (en) * 2009-07-10 2013-09-19 Stabilus Gmbh Piston-cylinder assembly
RU2435992C1 (en) * 2010-04-19 2011-12-10 Государственное образовательное учреждение высшего профессионального образования "Ивановская государственная текстильная академия" (ИГТА) Device for creation of pulse mode of loading actuating elements of process machines

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RU2681556C2 (en) 2019-03-11
RU2014148712A3 (en) 2018-07-27
DE102013224819A1 (en) 2015-06-11

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