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WO2020071977A1 - Système de surveillance d'état d'un système sous pression - Google Patents

Système de surveillance d'état d'un système sous pression

Info

Publication number
WO2020071977A1
WO2020071977A1 PCT/SE2019/000015 SE2019000015W WO2020071977A1 WO 2020071977 A1 WO2020071977 A1 WO 2020071977A1 SE 2019000015 W SE2019000015 W SE 2019000015W WO 2020071977 A1 WO2020071977 A1 WO 2020071977A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
pressure fluid
accordance
hydraulic
previous
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.)
Ceased
Application number
PCT/SE2019/000015
Other languages
English (en)
Inventor
Roger Gustavsson
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.)
Thordab Industri Innovation AB
Original Assignee
Thordab Industri Innovation AB
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 Thordab Industri Innovation AB filed Critical Thordab Industri Innovation AB
Priority to SE2030245A priority Critical patent/SE546779C2/sv
Publication of WO2020071977A1 publication Critical patent/WO2020071977A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0427—Heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/89—Control specific for achieving vacuum or "negative pressure"

Definitions

  • the present invention relates to a system for condition monitoring of pressurized fluid systems in accordance with the claims.
  • One of the problems with existing hydraulic systems is the difficulty of monitoring the status regarding; for example, wear in components included in the hydraulic system or in components connected to the hydraulic system.
  • patent application SE173G295-1 discloses a variant of a dehumidifying device whi ch is intended to separate moisture from air in a hydraulic tank and the air which is introduced into the hydraulic tank in connection with volume reduction in the tank.
  • the design differs from the design examined as it is not a system for monitoring the condition of a hydraulic system.
  • a further problem with the known pressurized systems is that they only filter out particles or moisture without an effecti ve condition monitoring of hydraulic systems.
  • the object of the present invention is to eliminate or substantially reduce at least one of the aforementioned, or in the following description, problems with existing types of system.
  • the object is solved by a system as well as a method of using the system in accordance with the present patent application.
  • Figure 1 shows an illustrative system according to a first embodiment of the present patent application.
  • Figure 2A shows in a hydraulic diagram a system in its first embodiment.
  • Figure 2B shows in a hydraulic diagram a first alternative embodiment of the system.
  • Figure 3A shows in a hydraulic diagram a second alternative embodiment of the system.
  • Figure 4 shows in a hydraulic diagram a third alternative embodiment of the system.
  • Figure 5 shows an alternative embodiment of a system according to the present patent application.
  • Figure 6 shows a further embodiment of the present system.
  • Figure 7 show's a further embodiment of the present system.
  • Figure 8 shows a further embodiment of the present system.
  • Figure 9 shows a further embodiment of the present system.
  • Figure 10 show's a further alternative embodiment of the present system.
  • the pressurized fluid system in the exemplary' embodiments comprises at least one hydraulic system 2.
  • the system 1 for monitoring hydraulic system 2 is intended to be connected to, or integrated with, any type of existing hy draul ic system 2.
  • the design of the hydraulic syste 2 can vary' to a very large extent in the preferred embodiments, system 1 is also intended to completely or partially reduce the presence of at least one contaminant in the pressurized liquid system.
  • Contaminants refers to substances, particles or the like that are not sought in the pressurized liquid. By contamination for example, is meant water, particles, or air or anything else that is not sought in the pressurized liquid.
  • the hydraulic system 2 comprises at least one first tank 3, main tank, hydraulic tank or the like.
  • the tank 3 comprises at least one inlet and a partial volume respectively of the pressurized liquid system pressure fluid 4.
  • the tank 3 further comprises a partial volume of air 5.
  • the volume of air 5 in the tank 3 varies depending on the volume of pressure liquid in the tank.
  • the pressurized fluid is pressurized via at least one first pump, not shown in figures, and is passed through the piping system into the hydraulic system 2.
  • parts of the hydraulic system 2 in the figures are omitted. Thus, for example, components driven by the hydraulic system 2 are not included in the figures.
  • the hydraulic system 2 monitoring system 1 comprises at least one second tank 6.
  • the second tank comprises at least one inlet and at least one outlet.
  • the tank 6 comprises a volume of pressurized fluid 4 and a volume of air 5.
  • the volume of air 5 in the tank 6 varies depending on the volume of pressurized fluid 4 in the tank.
  • the second tank 4 is standalone but communicates with the first tank 3 via at least one line 7 such as pipes, tubing or the like.
  • the second tank is integrated with the first tank 3.
  • Pressure fluid is supplied to the second tank 4 from at least one leakage line 8 from a hydraulic component such as motor, pump or other hydraulic component.
  • pressure fluid is combined from at least one first leakage line 8a, at least one second leakage line 8b and at least one third leakage line 8c to the leakage line 8
  • the advantage of the system 1 comprises at least one second tank 6 in which at least one leakage line results in that no counter pressure or substantially low back pressure exists in the leakage line or leakage lines.
  • the system 1 consists of a subsyste which is connected to or integrated with the hydraulic system.
  • the system comprises at least one drive unit such as, for example, a motor 9 which drives at least one pump 10, such as a hydraulic pump.
  • the pump 9 sucks pressure fluid 4 from the second tank 6 via at least one suction line 1 1.
  • the pump 6 pressurizes pressure fluid 4 and for the pressurized pressure fluid 4 via at least one pressure line 12 to at least one filter 13.
  • the filter 13 Is in the exemplary ' embodiment a particle filter in which particles are filtered away from the pressure fluid 4. From the filter 13, the pressure fluid 4 is passed directly or indirectly via at least one conduit 14, pipe, hose or the like to the first tank 3.
  • filtration of the pressurized liquid 4 is effected by the separation of particles in the filter 13.
  • the result of the filtration is that the pressurized liquid 4 comprises a smaller amount of particles after the filtration.
  • a smaller amount of particles in the pressure flui 4 increases the service life of components included in the hydraulic system.
  • the system 1 comprises at least one subsystem for measuring the leakage volume per unit of time. This can be done in several ways. For example, by using at least one first sensor 15, or the like. In the exemplary embodiment, this is done by the second tank 6 comprising at least one first sensor 15 and at least one second sensor 16.
  • the first sensor 15, the sensor is located at a first distance, height, from the bottom 17 of the second tank 6.
  • the second sensor 16 is located at a second distance, height, from the bottom 17 of the second tank 6.
  • the first sensor 15 is located at a first distance, height, from the bottom 17 of the second tank 6.
  • the liquid level 18 consists of an "on-off’ sensor of the appropriate type. This detects when the liquid level 18 reaches the first level.
  • the second sensor is an on-off sensor of the appropriate type which detects the liquid level on a second level 19.
  • the flow' in leakage lines is calculated based on how long it takes to fill the tank 6 between the level 18 of the first sensor and the level 19 of the second sensor. Through the design, leakage per unit of time can be determined, that is, flow per unit of time.
  • the system for measuring the flow ? in leakage lines may use another type of sensor suitable for the purpose in the monitoring system.
  • the sensor in the monitoring system may be of another type of sensor or the like, which senses the flow per unit time in the leakage line constituting an alternative embodiment of the present invention.
  • a first alternative embodiment of the system 2 shown in Fig. 3 is shown, the system comprising at least one first particle counter 20, particle sensor, particle sensor or the like.
  • the particle counter 20 is connected to the pressure line between the pump 10 and the particle filter 13.
  • the first particle counter 20 may be positioned at another suitable position in the system 1.
  • the first particle counter 20 is, for example, an optical sensor or another suitable sensor for the purpose.
  • the first particle counter 20 is of a magnetic type.
  • the system in embodiments further comprises at least a first regulating valve 21 intended to enable one to control the flow through the pump 6, the filter 9 and the particle counter 20, the particle sensor.
  • the first regulating valve 21 is connected via at least one conduit 22, pipe, hose or the like to the tank 3 and at least one conduit, tube hose or the like to the tank 6. By operating the first regulating valve 21 , pressurized liquid which is purified can be taken from the tank 6 or the tank. 3.
  • a so-called bypass circuit is created where purification of the pressure fluid in the tank 3 can take place during a time when a measurement of leakage in leakage pipes is made, that is during the time as the volume, the measuring volume, between sensors 15 and 16 in tank 3 is filled.
  • the control system controls the pumped flow so that the purification of the pressure fluid in the particle filter preferably takes place with an optimum or substantially optimal flow for the particle filter.
  • a second alternative embodiment of the system which comprises at least a third sensor 23 for sensing at least one pressure fluid parameter in the main tank 3.
  • the sensor 23 can sense the functional content of the pressure fluid, sense the temperature or sense another parameter or other parameters.
  • the figure does not show pumps and pipes, hoses for conveying the pressure fluid, such as the hydraulic oil, from and to the main tank via components and the like driven by the pressure fluid.
  • the system in accordance with the embodiment further comprises at least a first gear valve 21 intended to enable the flow to be controlled via the pump 6, the filter 9 an the particle counter, the particle sensor.
  • the system 2 comprises a dehumidifying device 24 which dehumidifies the air 5 in at least one of the tanks 3 or 6.
  • the dehumidification takes place in connection with volume changes in the tank 3 and or 6 and the air is discharged from the tank 3 and / or 6 and introduced in the respective out of the tank 3 and / or the tank 6 via the dehumidifying device 24.
  • the dehumidifying device 24 communicates via at least one conduit 25 with the tank 3.
  • the system 1 comprises at least one expandable body 27, balloon, to which air from the hydraulic tank is brought in conjunction with an increase in the hydraulic oil level in the tank and from which air is introduced at a decrease in the hydraulic oil level in the tank.
  • the respective leakage line opens directly or indirectly into the second tank 6.
  • At least one of the leakage lines is provided with at least one flow sensor in alternative embodiments 28
  • each leakage line is provided with at least one flow sensor 28 or the like. The design makes it possible to measure the flow in at least one second leakage line.
  • the respective leakage line comprises at least one particle counter each.
  • the system 1 comprises at least one second tank 6 and at least one third tank 29.
  • the respective leakage line comprises at least one second regulating valve 30.
  • the second regulating valve 30 controls the flow to either the second tank 6 or the third tank 29.
  • At least one leakage line is connected to the third tank 29.
  • at least one first leakage conduit 8a, at least one second leakage conduit 8b and at least one third leakage conduit 8c are connected to the third tank 29.
  • a choice can be made if the flow of leakage lines 8a or 8b per unit of time to be analyzed.
  • the embodiment includes the alternating valves 30a, 30b and 30c, a choice can be made about which flow of leakage lines 8a, 8b or 8c per unit of time to be analyzed.
  • At least one of these tanks 3 or 6 has a bottom which contains a sub-surface which is angled relative to the horizontal plane (when using the system).
  • the bottom consists of at least one first sub-surface 31 and at least one second sub surface 32
  • the second sub-surface 32 is angled with respect to the first sub-surface 31.
  • FIG. 7 there is shown a further alternative embodiment of the present patent application which includes at least one vacuum pump 33, undersupply unit or the like, which puts the tank 28 and / or the tank 6 under vacuum.
  • the vacuum pump 33 With the vacuum pump 33, the pressure liquid is degassed.
  • the construction comprises at least one conduit 34 which connects the vacuum unit 33 to the tank 28. If the oil has a sufficient heat, the underpressure means that water in the pressurized liquid can boil and a degassing thereof takes place.
  • ch comprises at least one heater 34, the heat release device with which the pressure fluid in the system in the tank 28 and / or the tank 6 is heated .
  • the heater can be of different types.
  • the heater is used in cases where the pressure fluid is cold and needs to be heated in order for an effective degassing of the pressure fluid to take place.
  • both the pressurized liquid is heated and it is pressurized. However, this does not exclude that only one of the heat or vacuum is used.
  • the system is shown in accordance with FIG. 7, but this also includes at least one dehumidifying device 24 in accordance with the prior art.
  • the system 1 may further comprise at least one expandable body according to previously described.
  • the system comprises at least one control system 35 which includes at least one control unit 36 with which monitoring and control of the system's functions takes place.
  • the control system controls the functions of the system.
  • the control system preferably also logs the state, status, of the hydraulic system.
  • the controller comprises at least one display and at least one communication unit.
  • the control system also communicates with at least one external device.
  • the communication is preferably wireless, but in alternative embodiments can be via wires placed on the part located at the bottom of the tank.
  • FIG. 9 a variant of the system according to Fig. 8 is shown where the vacuum unit 33 is connected to the expandable body.
  • the embodiment comprises at least one valve through which the flow to and from the expandable body can occur.
  • the embodiment shown in Figure 9 constitutes a closed system or substantially closed system.
  • the sensor may consist of a first sensor.
  • the measurement of the flow per unit of time is achieved by a sensor that senses a first level and one that senses a second level.
  • the present invention provides a number of advantages. The most obvious is that at least one of the problems described in the background with existing designs is eliminated or
  • a state monitoring of a hydraulic system allows at the same time a treatment of the pressure fluid.
  • treatment for example, is mean t the separation of particles, dehumidification, degassing and more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention concerne un système (1) pour surveiller l'état d'au moins un composant d'un système de fluide sous pression, ledit système de fluide sous pression comprenant au moins un premier réservoir (3) et au moins un premier dispositif de mise sous pression pour fluide sous pression (4), telle qu'une première pompe, et au moins un composant hydraulique relié directement ou indirectement au réservoir (3) par l'intermédiaire d'au moins une conduite de fuite (8). Le système (1) est destiné à être utilisé pour surveiller l'état d'au moins un composant hydraulique du système de fluide sous pression et pour éliminer au moins un contaminant ou analogue du fluide sous pression (4), les fonctions du système (1) étant commandées par au moins un système de commande. La surveillance d'état est effectuée par le système (1) comprenant au moins un second réservoir (6), dans lequel débouche au moins une conduite de fuite (8). Le système comprend au moins un premier capteur (15) pour détecter au moins un premier niveau de liquide dans le second réservoir (6) et permettre au système de commande de calculer la fuite par unité de temps. Le système (1) comprend au moins une pompe (10) pour mettre sous pression un fluide ayant traversé au moins un filtre (13), du premier réservoir (3) vers le second réservoir (6).
PCT/SE2019/000015 2018-10-03 2019-10-03 Système de surveillance d'état d'un système sous pression Ceased WO2020071977A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE2030245A SE546779C2 (sv) 2018-10-03 2019-10-03 System för tillståndsövervakning av trycksatta vätskesystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1830281-0 2018-10-03
SE1830281 2018-10-03

Publications (1)

Publication Number Publication Date
WO2020071977A1 true WO2020071977A1 (fr) 2020-04-09

Family

ID=70055636

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2019/000015 Ceased WO2020071977A1 (fr) 2018-10-03 2019-10-03 Système de surveillance d'état d'un système sous pression

Country Status (2)

Country Link
SE (1) SE546779C2 (fr)
WO (1) WO2020071977A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4403414A1 (fr) * 2023-01-20 2024-07-24 Scheuerle Fahrzeugfabrik GmbH Système et procédé d'équilibrage de fluide hydraulique et véhicule de transport de charges lourdes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012174201A1 (fr) * 2011-06-14 2012-12-20 Parker Hannifin Corporation Isolateur de boîte à engrenages
US20150034173A1 (en) * 2013-08-05 2015-02-05 John J. Paoluccio Closed antioxidant fluid system and method for promoting antioxidant properties thereof
US20150041414A1 (en) * 2013-08-09 2015-02-12 Ledwell & Son Enterprises, Inc. Hydraulic fluid cooler and filter
WO2017184657A1 (fr) * 2016-04-18 2017-10-26 Nagler Samantha Système de régulation de contaminant de réservoir

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012174201A1 (fr) * 2011-06-14 2012-12-20 Parker Hannifin Corporation Isolateur de boîte à engrenages
US20150034173A1 (en) * 2013-08-05 2015-02-05 John J. Paoluccio Closed antioxidant fluid system and method for promoting antioxidant properties thereof
US20150041414A1 (en) * 2013-08-09 2015-02-12 Ledwell & Son Enterprises, Inc. Hydraulic fluid cooler and filter
WO2017184657A1 (fr) * 2016-04-18 2017-10-26 Nagler Samantha Système de régulation de contaminant de réservoir

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4403414A1 (fr) * 2023-01-20 2024-07-24 Scheuerle Fahrzeugfabrik GmbH Système et procédé d'équilibrage de fluide hydraulique et véhicule de transport de charges lourdes

Also Published As

Publication number Publication date
SE2030245A1 (sv) 2020-08-07
SE546779C2 (sv) 2025-02-18

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