EP1485619A1 - Pompe - Google Patents

Pompe

Info

Publication number
EP1485619A1
EP1485619A1 EP03714804A EP03714804A EP1485619A1 EP 1485619 A1 EP1485619 A1 EP 1485619A1 EP 03714804 A EP03714804 A EP 03714804A EP 03714804 A EP03714804 A EP 03714804A EP 1485619 A1 EP1485619 A1 EP 1485619A1
Authority
EP
European Patent Office
Prior art keywords
pump
crankcase
opening
bearing
flow
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.)
Granted
Application number
EP03714804A
Other languages
German (de)
English (en)
Other versions
EP1485619B1 (fr
Inventor
Erich Becker
Erwin Hauser
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.)
KNF Neuberger GmbH
Original Assignee
KNF Neuberger 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 KNF Neuberger GmbH filed Critical KNF Neuberger GmbH
Publication of EP1485619A1 publication Critical patent/EP1485619A1/fr
Application granted granted Critical
Publication of EP1485619B1 publication Critical patent/EP1485619B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/128—Crankcases
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/06—Venting
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • the invention relates to a pump with an oscillating pump part, the pump having a pump housing with a working space and a crankcase delimited by the pump part, in which there is a pump drive with a drive shaft which is mounted in the bearings arranged in the walls of the cube housing. At least one of which is inserted into a through opening in a crankcase wall, and wherein the pump has a suction guide that is separate from the crankcase.
  • the solution to this problem according to the invention consists in particular in that at least one flow channel for pressure equalization of the crankcase during the oscillatory movements of the pump part is provided in the crankcase walls and that a flow damper is arranged in the at least one flow channel.
  • the pump according to the invention has at least one flow channel in the crankcase walls, which effects a pressure compensation of the crankcase during the oscillating movements of the pump part.
  • a flow damper is arranged which flows through Air volume is limited.
  • the flow damper in the flow channel is reduced so much by the flow damper that the noise caused by an air flow is also greatly reduced.
  • the pump according to the invention is therefore characterized by a particularly low-noise run.
  • An oil-free air compressor is known from DE 201 19 407 U1, which has a compressor housing which is divided into a crankshaft housing and a working cylinder by an oscillating piston. A check valve is provided on the piston, allowing air to flow from the crankcase through the check valve into the cylinder.
  • the working cylinder is only provided with an air outlet opening and a check valve.
  • the crankshaft housing is provided on one side with an air inlet opening that covers an air filter.
  • the previously known air compressor does not have an intake guide that is independent of the crankshaft housing.
  • a shaft seal which has a labyrinth seal on both sides of a shaft bearing located in a through opening.
  • the passages of the labyrinth seal are so narrow that almost no flow passage is possible anyway.
  • the passages of the labyrinth seals are kept, at least in regions, under a pressure which is higher than the pressure prevailing outside the bearing. In this way, the labyrinth seals of the known shaft seal can effectively prevent any flow passage in the area of the passage opening.
  • a particularly advantageous further development according to the invention of its own worthy of protection provides that at least one through-opening having at least one bearing is designed as a flow channel, and that in the area of the at least one bearing inserted into the through-opening designed as a flow channel, a flow damper covering the clear channel cross-section is arranged.
  • at least one through opening having at least one bearing is designed as a flow channel. Since a flow damper is also arranged in the passage opening forming the flow channel, the amount of air flowing through the bearing is greatly reduced. As a result, the flow velocity in the gap remaining in the bearing drops so much that the noise caused by the air flow is also greatly reduced.
  • a particularly simple and advantageous embodiment according to the invention provides that the flow damper is formed by one or more disks made of open-pore or the like gas-permeable material with high pneumatic resistance.
  • the flow damper can consist, for example, of one or more disks made of open-pore foam material.
  • the flow damper is formed by one or more felt or fleece disks.
  • At least one relief opening is provided in the crankcase wall, which is preferably covered with a flow damper. Air can be exchanged through this relief opening in the crankcase wall in such a way that the air flow hardly has to force itself through the bearings located in the through openings.
  • the flow damper is provided on both sides of the bearing inserted into a through opening.
  • the invention described above can be used for example in reciprocating pumps with a reciprocating piston serving as a pump part.
  • a preferred development according to the invention provides that the pump as a diaphragm pump and whose oscillating pump part is designed as a membrane.
  • a diaphragm pump 1 which serves as a compressor or as a vacuum pump.
  • the diaphragm pump 1 has a pump housing 2, in which a working space 3 is delimited from a crankcase 4 by an oscillating pump part.
  • a membrane 5 made of elastic material serves as the pump part, which is clamped on its membrane circumference in the pump housing 2 and which can be set into oscillating movements by means of an eccentric drive serving as a pump drive 6.
  • the membrane 5 is shown here in a top dead center, in which it fills the working space 3 almost form-fitting.
  • the pump drive 6 is provided with its drive shaft 7 in the crankcase 4.
  • the drive shaft 7 is mounted on both sides of the eccentric drive 6 in roller bearings 8, 9 which are arranged in the crankcase walls and are designed here as ball bearings.
  • roller bearings 8, 9 which are arranged in the crankcase walls and are designed here as ball bearings.
  • the bearing 8 is inserted into a through opening 11 located in the crankcase wall and leading out of the crankcase 4.
  • the bearing 9 is also inserted on the opposite crankcase wall into a through opening 11 leading out of the crankcase 4. So that no grease escapes from the grease-lubricated bearings 8, 9 even when the pump 1 is hot and thus the lubrication is reduced, the bearings 8, 9 are covered on both sides by cover disks 12. These cover plates seal against the ball bearing inner ring without contact.
  • a flow damper covering the bearing opening is arranged in the area of the bearings 8, 9 inserted into the through openings 11 of the crankcase walls.
  • This flow damper is formed here by discs 13 made of fleece, felt or the like gas-permeable material with high pneumatic resistance, which are provided on both sides of the bearings.
  • This flow damper greatly reduces the amount of air flowing through the bearings and in particular through the gap remaining between the inner and outer ring of the bearings. As a result, the flow velocity in the bearing gap drops so much that the noise caused by the air flow is also greatly reduced.
  • the pump 1 shown here is therefore characterized by a particularly low-noise run.
  • a relief opening 14, 14 / is additionally provided, which is covered here by a flow damper.
  • the flow damper assigned to the relief opening 14, 14 ' is also formed from a plurality of gas-permeable discs 15 with high pneumatic resistance, in particular from a plurality of fleece or felt discs.
  • the relief opening 14, 14 ' is dimensioned such that the resistance in the region of the Bearing openings of the bearings 8, 9 is larger than that in the area of the relief opening 14, 14 '.
  • the disks 15 can also be selected so that their pneumatic resistance is less than the resistance in the area of the bearings 8, 9. In this way, it is avoided that the pressure equalization between the crankcase 4 and the atmosphere is only partially via the bearings 8, 9 takes place; At the same time, it is ensured that the grease required for bearing lubrication cannot flow outside.
  • the pump shown here is characterized by a particularly low-noise mode of operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe (1) comportant un élément oscillant, composée d'un carter de pompe (2) renfermant une chambre de travail (3), et d'un carter de vilebrequin (4) séparé du carter de pompe par l'élément oscillant. Ledit carter de vilebrequin contient un entraînement de pompe (6) comportant un arbre d'entraînement (7) logé dans des paliers (8, 9) situés dans les parois du carter de vilebrequin, au moins un de ces paliers étant inséré dans une ouverture de passage (11) dans une paroi du carter de vilebrequin. Ladite pompe comporte une buse d'aspiration séparée du carter de vilebrequin. La pompe selon l'invention est caractérisée en ce que les parois du carter de vilebrequin comportent au moins un canal d'écoulement destiné à la compensation de pression lors des mouvements d'oscillation de l'élément oscillant, et en ce que le ou les canaux d'écoulement comportent un réducteur d'écoulement. Dans un mode de réalisation préféré, une ouverture de passage comportant au moins un palier est conçue en tant que canal d'écoulement.
EP03714804A 2002-03-19 2003-03-12 Pompe Expired - Fee Related EP1485619B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10212239A DE10212239A1 (de) 2002-03-19 2002-03-19 Pumpe
DE10212239 2002-03-19
PCT/EP2003/002524 WO2003078841A1 (fr) 2002-03-19 2003-03-12 Pompe

Publications (2)

Publication Number Publication Date
EP1485619A1 true EP1485619A1 (fr) 2004-12-15
EP1485619B1 EP1485619B1 (fr) 2007-05-09

Family

ID=27815784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03714804A Expired - Fee Related EP1485619B1 (fr) 2002-03-19 2003-03-12 Pompe

Country Status (6)

Country Link
US (1) US7270048B2 (fr)
EP (1) EP1485619B1 (fr)
JP (1) JP2005527727A (fr)
DE (2) DE10212239A1 (fr)
TW (1) TW576895B (fr)
WO (1) WO2003078841A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4565564B2 (ja) * 2005-10-25 2010-10-20 日東工器株式会社 低振動ポンプ
US7470066B2 (en) * 2006-03-22 2008-12-30 Gm Global Technology Operations, Inc. Pump bearing assembly with seal
JP5004208B2 (ja) * 2006-03-24 2012-08-22 株式会社リコー 吸気装置及びそれを備えた画像形成装置
DE102007003720B3 (de) * 2007-01-25 2008-08-21 Knf Neuberger Gmbh Membranpumpe mit zwei Membranköpfen und zwei separaten Pumpengehäusen
US20110183654A1 (en) * 2010-01-25 2011-07-28 Brian Lanier Concurrent Use of Multiple User Interface Devices
US20110181780A1 (en) * 2010-01-25 2011-07-28 Barton James M Displaying Content on Detected Devices
CN103078440A (zh) * 2012-12-30 2013-05-01 深圳市颜华守信科技有限公司 防中心转子晃动的电机及泵体
AU2015370586B2 (en) * 2014-12-22 2020-07-16 Smith & Nephew Plc Negative pressure wound therapy apparatus and methods
US9677557B2 (en) * 2015-01-20 2017-06-13 Hao Hsu Sleeping system
US10794375B2 (en) * 2015-05-05 2020-10-06 Parker-Hannifin Corporation Miniature vacuum/pressure diaphragm pumps with noise mitigation boot

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176691A (en) * 1937-04-09 1939-10-17 Miller Simons Inc Fluid compressor
US2204814A (en) * 1939-01-28 1940-06-18 Westinghouse Air Brake Co Fluid compressor
GB600460A (en) * 1943-12-06 1948-04-09 Roy Douglass Buell Improvements in or relating to compressors
DE975981C (de) * 1952-02-20 1963-01-03 Siemens Ag Wellenabdichtung fuer Lager, insbesondere solche von elektrischen Maschinen
US2873687A (en) * 1955-05-12 1959-02-17 Malsbary Mfg Company Diaphragm pump
US2981197A (en) * 1957-12-11 1961-04-25 Gen Motors Corp Variable stroke diaphragm pump with eccentric drive
US3844688A (en) * 1973-05-08 1974-10-29 Dunham Bush Inc Compressor crank case venting arrangement for eliminating lube oil carryover
US5160773A (en) * 1991-08-16 1992-11-03 W. L. Gore & Associates, Inc. Encapsulated felt
BE1010852A3 (nl) * 1997-01-15 1999-02-02 Atlas Copco Airpower Nv Asafdichting.
DE20119407U1 (de) * 2001-11-28 2002-02-21 Shiau, Yih-Ming, Tien-Chung, Changhua Ölloser Luftkompressor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03078841A1 *

Also Published As

Publication number Publication date
US20050112004A1 (en) 2005-05-26
WO2003078841A1 (fr) 2003-09-25
DE10212239A1 (de) 2003-10-09
EP1485619B1 (fr) 2007-05-09
JP2005527727A (ja) 2005-09-15
TW576895B (en) 2004-02-21
US7270048B2 (en) 2007-09-18
DE50307237D1 (de) 2007-06-21
TW200304986A (en) 2003-10-16

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