EP3045738A1 - Verin hydraulique - Google Patents

Verin hydraulique Download PDF

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Publication number
EP3045738A1
EP3045738A1 EP16000015.4A EP16000015A EP3045738A1 EP 3045738 A1 EP3045738 A1 EP 3045738A1 EP 16000015 A EP16000015 A EP 16000015A EP 3045738 A1 EP3045738 A1 EP 3045738A1
Authority
EP
European Patent Office
Prior art keywords
rod
piston
piston rod
hydraulic cylinder
cylinder
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
EP16000015.4A
Other languages
German (de)
English (en)
Inventor
Frank Lill
Jörg Meyer
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.)
Hydrosaar GmbH
Original Assignee
Hydrosaar 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 Hydrosaar GmbH filed Critical Hydrosaar GmbH
Publication of EP3045738A1 publication Critical patent/EP3045738A1/fr
Pending legal-status Critical Current

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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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0621—Shield advancing devices
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members

Definitions

  • the invention relates to a hydraulic cylinder, in particular for use in a tunnel boring machine provided Dehner cylinder in the form of a single-acting differential cylinder, which connected to the rod side of his piston piston rod extends through the surrounding rod-side cylinder chamber to the outside.
  • Tunnel boring machines also referred to as tunnel boring machines, are full-cut machines that break down the entire tunnel cross-section to be built in one work step.
  • Well-known tunneling projects in Germany where tunnel boring machines were used or are still in use include, for example, the Elbtunnel tube "Trude”, Hamburg, the Leipzig City Tunnel, the Fildertunnel (also the Stuttgart 21 rail project) to call the domestic projects.
  • a significant component of such machines is a drill head, also called a plate, which has a drivable cutting head, which is equipped with removal tools, such as a plurality of roller bits.
  • the advancement of the shield and the other displaceable components in the tunnel driving direction takes place by means of a main pressing station and at least one intermediate pressing station.
  • the main press station which is located in a start shaft, from which the boring process of the tunnel, has an abutment on which a press device is supported, by means of which shell parts, so-called. Tubbing, depending on the progress of work in the launch shaft are used, are gradually movable in the working feed direction.
  • Dehner cylinders are provided in an intermediate press station, which is located a short distance behind the front plate. These are provided in the form of an inner ring of individual cylinders arranged distributed along the peripheral region, wherein the number of Dehner cylinders, depending on the respective tunnel diameter, may be 20 cylinders or more.
  • the Dehner cylinders are separately hydraulically controlled and generate successive when extending the piston rods feed steps of the drill head according to the stroke length of the cylinder. After each feed step, the Dehner cylinder are retracted, and starting from the main press station located behind the intermediate press station elements are advanced by the feed step by the main press station, after which a new tubbing is used in the start shaft to another by extending the Dehner cylinder next Feed step, etc.
  • the invention has the object to provide a hydraulic cylinder is available, which is characterized in particular when used as a Dehner cylinder by a particularly favorable performance.
  • the invention according to the wording of claim 1 in a single-acting differential cylinder before, in the piston rod, an inner cavity is formed, wherein in the piston rod, a passage is formed, which connects the inner cavity with the rod-side cylinder space.
  • the rod-side cylinder chamber is vented to the atmosphere in order to avoid the build-up of a counter-pressure in the extension of the piston reducing the volume of the rod-side space opens up in the invention, the possibility of the rod-side space and the inner cavity of the piston rod as in itself Form closed system, because through the inner cavity, an inner buffer volume in the piston rod is available, so that the pressure increase during extension remains in a negligible frame.
  • the arrangement may be made such that the piston rod has a tube and that the passage is formed by a bore extending through the wall of the tube, which is advantageously formed on the connected to the piston end portion of the piston rod.
  • the piston surface acted upon by the working pressure is at least three times the width of the rod-side cylinder chamber defining the piston rod surrounding Annular surface. In this construction, a particularly favorable volume ratio of the two rooms can be realized.
  • a filling opening is provided, via which the cavity of the piston rod and the rod-side cylinder chamber with a gaseous medium, in particular N 2 , can be filled.
  • a gaseous medium in particular N 2
  • the presence of an inert inner medium ensures a particularly high corrosion safety, especially if a corrosion inhibitor is added to such a filling gas.
  • the arrangement can be made with particular advantage so that the remote from the piston, led out of the cylinder chamber end of the tube of the piston rod is tightly closed by a threaded insert, in which the filling port is formed for the gaseous medium.
  • a check valve opening at a given pressure of the gaseous medium can be provided between rod-side cylinder space and the atmosphere.
  • the check valve may for example be set to an opening pressure of 5 bar, a pressure value which is not reached in normal operation, if Volume of the inner cavity of the piston rod is at least 2.3 times the largest value of the rod-side cylinder space. Accordingly, it is preferably provided that the volume of the inner cavity is a multiple of the volume of the rod-side cylinder chamber in the fully retracted, recirculated position of the piston.
  • the check valve is advantageously arranged so that it opens at the inner end of the annular body in the rod-side cylinder space and that the piston has a radial taper at the end facing the stop. This ensures that even with the extended end position of the piston, the discharge point of the check valve is not covered by the adjacent lateral surface of the piston.
  • Fig. 1 In the merely sketchy and greatly simplified drawn representation of Fig. 1 are a cutting shoe or sign with 1 and a thereto, rotatable front cutting head designated 3. This has on the front of the usual in such cutting heads removal tools, such as roller bits and / or other cutting and crushing tools.
  • strand of the machine components follows on jacking pipes 5 and 7, which adjoin the shield 1, a designated 9 Between press station.
  • FIG. 1 Schematically indicated starting shaft 13 are in accordance with the traveled tunneling distance shell elements that form the tunnel lining, so-called. Tuebings 15, used.
  • main press station 17 located in the starting shaft 13 main press station 17 on a pressing unit 19 which is supported on an abutment 21 and the already used Tübbings 15 with retracted Dehner cylinders 11 of the before located intermediate press station 9 advances to the respective tunneling lines until another tubbing 15, as indicated by directional arrow 23, can be used with retracted pressing unit 19.
  • the tunneling continues.
  • the Fig. 2 shows in longitudinal section an embodiment of a hydraulic cylinder according to the invention, as it can be used with advantage as a Dehner cylinder 11 a tunnel boring machine of the type described.
  • the circular cylindrical cylinder housing has a jacket tube 25 which is connected to a in Fig. 2 closed right end by a welded housing cover 27 is closed.
  • the guided in the jacket tube 25 piston 29 travels, the housing, including jacket tube 25 and cover 27, a total length of about 1650 mm.
  • FIG. 2 shows the piston 29 in fully retracted end position, which can be acted upon by the working pressure of the hydraulic fluid, for example, with a pressure of 500 bar Piston surface 31 rests on the cover 27 having an input 33 and an output 35 for supply and discharge of the relevant hydraulic oil.
  • the piston 29, which is guided by means of axially spaced guide bands 37 and 39 in the jacket tube 25 and sealed thereto by means of a guide strips 37, 39 located compact seal 41 is connected on its inner rod side with a piston rod 43.
  • a piston rod 43 This is formed by a circular cylindrical tubular body which is connected to the piston 29 by means of a screw connection.
  • the piston 29 as a seat for the piston rod 43 has a circular cylindrical recess, on whose inner wall an internal thread 45 is formed, with which the end of the piston rod 43, which has an external thread 47, is screwed.
  • a wall of the recess of the piston 29 by cross grub screw 49 forms a backup for the screw.
  • the inner cavity 51 of the piston rod 43 is sealed at the end remote from the piston 29 by a screwed threaded insert 53.
  • a screwed threaded insert 53 At the in Fig. 2 shown, fully retracted position, the end of the piston rod 43 and the threaded insert 53 are slightly above the end of the jacket tube 25 of the cylinder housing.
  • the threaded insert 53 has on the front side a centrally located filling opening 55, from which, via a coaxial filling channel 57, the cavity 51 of the piston rod 43 can be filled with a gaseous medium.
  • an annular body 58 is screwed into the left, open end of the jacket tube 25, on the inside guide ribbons 59, a lip seal 61 and a scraper 63 are provided, which on the outside of the piston rod 43 abut.
  • a sealing ring 65 is provided on the ring body 58 for the sealing of the screw connection.
  • a rod-side cylinder chamber 67 is formed between the inside of the jacket tube 25 and the outside of the piston rod.
  • the rod-side cylinder chamber 67 with the inner cavity 51 of the piston rod 43 connecting passage is provided in the present invention in the present embodiment in the form of a wall
  • the volume of the inner cavity 51 of the piston rod 43 as a buffer volume available, so that the cylinder according to the invention as a completely closed system and not as to the atmosphere breathing system is operable.
  • the bore 73 forms a free passage to the buffer volume in the inner cavity 51 at all piston positions, the bore 73 is formed on the adjacent to the piston 29 end portion of the piston rod 43.
  • special protection against corrosion can in the invention via the filling opening 55 a filling of the interior, so the inner cavity 51, and be provided via the bore 73 of the rod-side cylinder chamber 67, with a gaseous medium.
  • an inert medium such as N 2
  • a check valve 75 may be provided for a pressure assurance of the filling pressure, which is set to an adapted opening pressure.
  • the check valve 75 may be set at a filling pressure of 1 bar, for example, to an opening pressure of 5 bar.
  • the mouth opening of the check valve 75 is located directly on the stop 71 of the ring body 58.
  • the piston 29 on the outside of the stop 71 facing the end of a radial taper 77 on.
  • the above-mentioned rod volume or the minimum total volume required for trouble-free operation must be so great that the increase in pressure is insignificant for the function of the expansion cylinder.
  • the rod volume does not necessarily have to be a multiple of the volume of the rod-side cylinder space.
  • the interpretation of the minimum total volume also depends on the planned po at maximum Total volume. Theoretically one could go at a maximum pressure of assumed 400 bar on the hydraulic side up to 399.9 bar (400 bar) on the gas side. Neglecting the friction, one would then have multiplied 0.1 bar by the effective area of the cylinder as the force for the feed. Theoretically, at 1 bar pre-filling, only a ratio of 1: 400, ie only 0.0025 times the minimum total volume would be necessary.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Actuator (AREA)
EP16000015.4A 2015-01-13 2016-01-08 Verin hydraulique Pending EP3045738A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015000494.8A DE102015000494A1 (de) 2015-01-13 2015-01-13 Hydraulikzylinder

Publications (1)

Publication Number Publication Date
EP3045738A1 true EP3045738A1 (fr) 2016-07-20

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ID=55080009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000015.4A Pending EP3045738A1 (fr) 2015-01-13 2016-01-08 Verin hydraulique

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EP (1) EP3045738A1 (fr)
DE (1) DE102015000494A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016009198A1 (de) 2016-07-27 2018-02-01 Hydac International Gmbh Schmiersystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4413279A1 (de) * 1994-04-16 1995-10-19 Guenther Hahn Hydraulische Einrichtung
DE10053847A1 (de) * 1999-11-02 2001-05-10 Smc Corp Fluiddruckzylinder mit konzentrierter Leitungsführung
DE102011106672A1 (de) * 2011-07-06 2013-01-10 Thomas Sauer Hydraulikzylinder zur Energierückgewinnung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606220C2 (de) * 1996-02-20 1998-08-27 Festo Ag & Co Arbeitszylinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4413279A1 (de) * 1994-04-16 1995-10-19 Guenther Hahn Hydraulische Einrichtung
DE10053847A1 (de) * 1999-11-02 2001-05-10 Smc Corp Fluiddruckzylinder mit konzentrierter Leitungsführung
DE102011106672A1 (de) * 2011-07-06 2013-01-10 Thomas Sauer Hydraulikzylinder zur Energierückgewinnung

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Publication number Publication date
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