US20050129549A1 - Hydro damper - Google Patents

Hydro damper Download PDF

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Publication number
US20050129549A1
US20050129549A1 US10/511,583 US51158304A US2005129549A1 US 20050129549 A1 US20050129549 A1 US 20050129549A1 US 51158304 A US51158304 A US 51158304A US 2005129549 A1 US2005129549 A1 US 2005129549A1
Authority
US
United States
Prior art keywords
housing
damper
pump
connecting block
axis
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.)
Abandoned
Application number
US10/511,583
Other languages
English (en)
Inventor
Herbert Baltes
Gernot Rupp
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.)
Hydac Technology GmbH
Original Assignee
Hydac Technology 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 Hydac Technology GmbH filed Critical Hydac Technology GmbH
Assigned to HYDAC TECHNOLOGY GMBH reassignment HYDAC TECHNOLOGY GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BALTES, HERBERT, RUPP, GERNOT
Publication of US20050129549A1 publication Critical patent/US20050129549A1/en
Abandoned 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators

Definitions

  • the invention relates to a hydro damper for attenuation of pressure oscillations and/or acoustic oscillations in systems which can use pressurized fluids for their operation.
  • equipment-induced processes of varied types can lead to pressure fluctuations, for example due to the sudden connection of spaces with a different pressure level, actuation of cutoff and control fittings with short opening and closing times, and especially due to nonuniformities in the operation of positive-displacement pumps, in which pump pulsations arise, and also due to processes of turning positive-displacement pumps on and off.
  • hydraulic dampers can be based on the principle of hydropneumatic bladder-type and diaphragm accumulators or can be made as reflection dampers (silencers).
  • the object of the invention is to provide a hydraulic damper with a construction which enables connection to the pertinent hydraulic system even with limited installation space and at a relatively large volume of the damper housing.
  • the damper housing may be connected to the pertinent hydraulic system in the desired rotary position, the damper housing can be housed in the pertinent installation space in an orientation such that the leading dimension of the damper housing extends in the direction which optimally uses the space.
  • damper housings in an elongated construction mode and with a comparatively large volume can be accommodated in constricted machinery spaces.
  • the possibility afforded by the invention for selecting the rotary position of the damper housing around the connecting axis which runs transversely to its longitudinal axis also enables direct connection, for example at the output of the pertinent hydraulic pump. Even under constricted installation conditions for example hydraulic dampers of the reflection type, in which a comparatively large volume of the damper housing is necessary, can be directly connected to the pertinent hydraulic pump with the limited available installation space.
  • the connecting axis to the leading dimension of the damper housing which defines the longitudinal axis of the housing runs at least approximately vertically.
  • the linking means has a pump connecting piece which forms the fluidic connection between the connecting block and a hydraulic pump and which can be fixed at the output of the hydraulic pump in selectable rotary positions relative to the connecting axis.
  • the output of the pump is provided for connection of linking parts according to the SAE standard, i.e., has a corresponding hole pattern for mounting screws
  • these holes those which correspond to the desired rotary positions of the connecting block relative to the connecting axis can be selected for the engagement of mounting screws which are provided on the connecting block.
  • a connection of the hydraulic damper to the output of the pump is possible in rotary steps which correspond to the spacing of the holes of the ring of holes in the pump connecting piece.
  • the pump connecting piece has a round end flange which in the selected rotary position can be fixed relative to the connecting axis by means of half ring-like SAE flange clamping jaws which can be screwed to the SAE connecting parts of the output of the pump, continuous selection of rotary positions is possible.
  • FIG. 1 presents a diagram illustrating a side view of one embodiment of the hydraulic damper as claimed in the invention
  • FIG. 2 presents a horizontal section of the embodiment from FIG. 1 drawn on a larger scale compared to FIG. 1 , and
  • FIG. 3 presents a perspective oblique view of the end area of a second embodiment of the hydraulic damper which is connected to the output of the hydraulic pump by way of an SAE connection, which view is drawn on a larger scale and also dismantled and exploded.
  • FIGS. 1 and 2 show a first embodiment of the invention, namely a reflection damper (silencer) having an elongated damper housing 1 with a leading dimension which defines the longitudinal axis 3 of the housing.
  • the damper housing 1 is fluidically connected on its one end which is located on the right in the figures to the connecting block 5 which in turn is connected by way of the pump connecting piece 7 to the output of a hydraulic pump which is not shown.
  • the accumulator housing 1 contains a damping pipe 9 which extends coaxially to the longitudinal axis 3 between the entry end 11 and the exit end 13 of the damper housing 1 .
  • the damping pipe 9 in the area of its half length has slot openings 15 for coupling of the fluid oscillations in the damping pipe 9 to the fluid volume 17 surrounding it within the damper housing 1 .
  • the holes 19 constitute permanent ventilation of the space containing the volume 17 so that the hydraulic dampers need not be pre-charged for starting, because air accumulations are discharged by way of the holes 19 .
  • the damper housing On the entry end 11 and on the exit end 13 the damper housing has one inside thread 21 respectively, into which screwed pieces 23 are screwed; in the inner hole of the screwed pieces which is concentric to the longitudinal axis 3 the ends of the damping pipe 9 are held.
  • the O-rings 25 which sit in the inner hole of the screwed pieces 23 elastically support the damping pipe 9 so that the pipe 9 does not produce any rattling noise in operation, without narrow tolerances being necessary.
  • the connecting block 5 has four holes 37 for engagement of mounting screws which are not shown and with which the connecting block 5 can be screwed to the pump connecting piece 7 .
  • the pump connecting piece 7 which is designed as an annular body in the embodiment from FIG. 1 and 2 and which for its part can be linked to the output of the hydraulic pump, for purposes of interaction with the holes 37 on the connecting block has a ring of holes 39 which are located on the same radius as the holes 37 of the connecting block 5 concentrically to a connecting axis 41 which runs perpendicular to the longitudinal axis 3 of the housing and which is defined by the center of the opening 35 which links the chamber 33 to the hydraulic pump.
  • the connecting block 5 can be turned around the connecting axis 41 in order to produce alignment between the desired holes 39 of the ring of holes on the pump connecting piece 7 with the holes 37 on the connecting block 5 , so that the damper housing 1 can be aligned with its longitudinal axis 3 to the desired rotary positions, relative to the connecting axis 41 .
  • the longitudinal extension of the damper housing 1 may be turned into a position in which the utilization of space is optimal under the respective installation conditions. In other words, this means that even under difficult installation conditions, a damper housing 1 with a comparatively large volume can be accommodated.
  • the rotary position of the damper housing 1 can be set in rotary steps which correspond to the spacing of the holes 39 on the periphery of the pump connecting piece 7 which is made as an annular body
  • the embodiment from FIG. 3 enables continuous setting of the rotary position of the damper housing 1 around the connecting axis 41 .
  • the pump connecting piece 7 is not made as an annular body with a peripheral ring of holes, but in the form of a circular cylindrical hollow body used as a fluid feed pipe which produces the inner chamber 3 of the connecting block 5 with the output of the hydraulic pump, which output is designated 43 and which is suggested schematically in FIG. 3 .
  • the hollow body of the pump connecting piece 7 which is concentric to the connecting axis 41 for the fluidic connection to the inner chamber 33 of the connecting block 5 has a wall penetration 45 which is flush with the longitudinal axis 3 of the damper housing 1 .
  • the pump connecting piece 7 On the open end which projects from the connecting block 5 and which can be attached to the pump output 43 for fluid entry, the pump connecting piece 7 has an end flange 47 .
  • the pump connecting piece 7 By means of the half ring-shaped flange clamping jaws 49 , as are common for connecting links according to the SAE standard (J 518), the pump connecting piece 7 can be fixed on the pump output 43 .
  • the round end flange 47 of the pump connecting piece 7 within the clamping jaws 49 which annularly surround the end flange 47 the rotary position around the connecting axis 41 can be selected continuously as desired.
  • damper housing 1 of a reflection damper which is shown for the two embodiments
  • damper systems with a different mode of operation could be equally mounted on the connecting block 5 , for example hydraulic dampers which are based on the principle of hydropneumatic bladder-type and diaphragm accumulators.
  • the hydraulic damper as claimed in the invention can be delivered in the manner of original equipment for a specific type of a plastic injection molding machine.
  • preferred holes on the pump connecting piece are provided over the existing hole pattern, and with subsequent deliveries a complex hole pattern on the pump connecting piece can then be dispensed with.
US10/511,583 2002-04-17 2003-04-03 Hydro damper Abandoned US20050129549A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10217081.9 2002-04-17
DE10217081A DE10217081A1 (de) 2002-04-17 2002-04-17 Hydrodämpfer
PCT/EP2003/003460 WO2003087584A1 (de) 2002-04-17 2003-04-03 Hydrodämpfer

Publications (1)

Publication Number Publication Date
US20050129549A1 true US20050129549A1 (en) 2005-06-16

Family

ID=29224529

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/511,583 Abandoned US20050129549A1 (en) 2002-04-17 2003-04-03 Hydro damper

Country Status (6)

Country Link
US (1) US20050129549A1 (de)
EP (1) EP1495231B1 (de)
JP (1) JP4125680B2 (de)
AT (1) ATE327439T1 (de)
DE (2) DE10217081A1 (de)
WO (1) WO2003087584A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050047931A1 (en) * 2002-08-30 2005-03-03 Myers Timothy A. Combination sight glass, strainer and orifice

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893096A1 (fr) * 2005-11-04 2007-05-11 Hydro Leduc Soc Par Actions Si Accumulateur oleopneumatique.
DE102009021683A1 (de) * 2009-05-18 2010-11-25 Hydac Technology Gmbh Flüssigkeitsschalldämpfer
DE102014111708A1 (de) * 2014-08-15 2016-02-18 Technische Universität Dresden Vorrichtung und Verfahren zur Dämpfung von Druck- und/oder Volumenschwankungen in einem Fluidstrom
DE102016203821A1 (de) * 2016-03-09 2017-09-14 Robert Bosch Gmbh Flüssigkeitsschalldämpfer

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354201A (en) * 1942-04-13 1944-07-25 Smith Meter Company Shock absorber for fluid flow installations
US3146724A (en) * 1961-11-20 1964-09-01 Armco Steel Corp Pumps with pulsation damper
US3375855A (en) * 1964-09-24 1968-04-02 Douglas B Deeks Steam boiler blowdown valve
US3672398A (en) * 1969-07-23 1972-06-27 Hitachi Ltd Accumulator for absorbing a pulsation of pump pressure
US3857413A (en) * 1971-11-03 1974-12-31 Greer Hydraulics Inc Pressure pulse dampener device
US4264287A (en) * 1978-07-28 1981-04-28 Nissan Motor Company, Limited Fuel pump assembly of fuel injection system
US4273158A (en) * 1979-05-09 1981-06-16 Greer Hydraulics, Incorporated Pressure pulse dampening device
US4307753A (en) * 1980-07-29 1981-12-29 Greer Hydraulics, Incorporated Wide frequency pulsation dampener device
US4526205A (en) * 1979-10-18 1985-07-02 Kazuo Sugimura Pulsation absorption device for high pressure liquid
US5205309A (en) * 1990-05-07 1993-04-27 Cardenas Richard A Adjustable pressure control device for hydraulic brake systems
US5337791A (en) * 1992-10-23 1994-08-16 Graco Inc. Dynamic surge suppressor for fluid flow lines
US5620028A (en) * 1995-03-20 1997-04-15 General Motors Corporation Brake Module with integrated accumulator
US5816291A (en) * 1994-05-20 1998-10-06 Lj Oljeledningar Ab Shock absorber for liquid conduits
US20030000588A1 (en) * 2001-03-21 2003-01-02 Kuykendal Robert L. Pulsation dampener

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307328A (en) * 1941-04-19 1943-01-05 Otis C Martin Swivel fitting
JPH05149493A (ja) * 1991-11-28 1993-06-15 Hitachi Cable Ltd ホース金具、ホースと油圧機器等の接続部、およびホー ス金具の製造方法
DE19547891A1 (de) * 1995-12-21 1997-06-26 Bosch Gmbh Robert Dichtungselement für einen aus einer Hohlschraube und einem Ringstutzen bestehenden hydraulischen Schraubanschluß

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354201A (en) * 1942-04-13 1944-07-25 Smith Meter Company Shock absorber for fluid flow installations
US3146724A (en) * 1961-11-20 1964-09-01 Armco Steel Corp Pumps with pulsation damper
US3375855A (en) * 1964-09-24 1968-04-02 Douglas B Deeks Steam boiler blowdown valve
US3672398A (en) * 1969-07-23 1972-06-27 Hitachi Ltd Accumulator for absorbing a pulsation of pump pressure
US3857413A (en) * 1971-11-03 1974-12-31 Greer Hydraulics Inc Pressure pulse dampener device
US4264287A (en) * 1978-07-28 1981-04-28 Nissan Motor Company, Limited Fuel pump assembly of fuel injection system
US4273158A (en) * 1979-05-09 1981-06-16 Greer Hydraulics, Incorporated Pressure pulse dampening device
US4526205A (en) * 1979-10-18 1985-07-02 Kazuo Sugimura Pulsation absorption device for high pressure liquid
US4307753A (en) * 1980-07-29 1981-12-29 Greer Hydraulics, Incorporated Wide frequency pulsation dampener device
US5205309A (en) * 1990-05-07 1993-04-27 Cardenas Richard A Adjustable pressure control device for hydraulic brake systems
US5337791A (en) * 1992-10-23 1994-08-16 Graco Inc. Dynamic surge suppressor for fluid flow lines
US5816291A (en) * 1994-05-20 1998-10-06 Lj Oljeledningar Ab Shock absorber for liquid conduits
US5620028A (en) * 1995-03-20 1997-04-15 General Motors Corporation Brake Module with integrated accumulator
US20030000588A1 (en) * 2001-03-21 2003-01-02 Kuykendal Robert L. Pulsation dampener

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050047931A1 (en) * 2002-08-30 2005-03-03 Myers Timothy A. Combination sight glass, strainer and orifice
US7083393B2 (en) * 2002-08-30 2006-08-01 Sullair Corporation Combination sight glass, strainer and orifice

Also Published As

Publication number Publication date
DE50303482D1 (de) 2006-06-29
WO2003087584A1 (de) 2003-10-23
EP1495231A1 (de) 2005-01-12
JP4125680B2 (ja) 2008-07-30
EP1495231B1 (de) 2006-05-24
JP2005522640A (ja) 2005-07-28
DE10217081A1 (de) 2003-11-13
ATE327439T1 (de) 2006-06-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HYDAC TECHNOLOGY GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BALTES, HERBERT;RUPP, GERNOT;REEL/FRAME:016352/0541

Effective date: 20041011

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION