EP1218640A1 - Appareil de nettoyage a haute pression - Google Patents

Appareil de nettoyage a haute pression

Info

Publication number
EP1218640A1
EP1218640A1 EP00967843A EP00967843A EP1218640A1 EP 1218640 A1 EP1218640 A1 EP 1218640A1 EP 00967843 A EP00967843 A EP 00967843A EP 00967843 A EP00967843 A EP 00967843A EP 1218640 A1 EP1218640 A1 EP 1218640A1
Authority
EP
European Patent Office
Prior art keywords
internal gear
pressure cleaning
cleaning device
high pressure
pump
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
EP00967843A
Other languages
German (de)
English (en)
Other versions
EP1218640B1 (fr
Inventor
Peter Scharwaechter
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP1218640A1 publication Critical patent/EP1218640A1/fr
Application granted granted Critical
Publication of EP1218640B1 publication Critical patent/EP1218640B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/027—Pump details

Definitions

  • the invention relates to a high-pressure cleaning device with a motor with an internal gear pump driven by the motor for conveying a cleaning liquid under high pressure to a discharge device.
  • Such a high-pressure cleaning device is known for example from DE 197 26 794.
  • the pump parts must therefore meet high requirements for corrosion resistance.
  • Internal gear pumps also require high tooth strength and high strength on the sealing surfaces.
  • the lubrication in the area of the moving parts of the internal gear pump is less than, for example, when pumping fuels or oily substances or oils.
  • the lubrication between the internal toothing of the ring gear and the external toothing of the internal gear takes place regularly through the medium to be pumped.
  • the associated wear of the moving parts in the mutual contact areas creates play in the area of the sealing surfaces, which leads to leaks at the sealing surfaces.
  • sintered materials have been used for internal gear pumps in high-pressure cleaning devices, some of which have been provided with coatings at the sealing points. It has also been proposed to use ceramics for such gear pumps.
  • the object and the aim of the invention is to find a material for the gears for high-pressure cleaning devices of the type described at the beginning with internal gear pumps that meets the above-mentioned requirements with regard to corrosion resistance and hardness.
  • This object is achieved in that in a high-pressure cleaning device with a motor, with an internal gear pump driven by the motor for conveying a cleaning liquid under high pressure to a discharge device, the internal gear and / or the external gear made of a molybdenum-containing chromium steel alloy with a nitrogen content of 0.1 - 1% exists.
  • chrome steel alloys with a nitrogen content of 0.2-1% in particular meet the requirements with regard to corrosion resistance.
  • chrome steel alloys with a nitrogen content of 0.3 - 1% is even better.
  • the material for the internal gear and / or the external gear has a molybdenum content between 0.8 and 2% by weight.
  • the number of process steps for producing the internal gears and / or the external gears is particularly low if they consist exclusively of the alloy according to the invention. In this case, no coatings on the sealing surfaces and / or similar processes are required.
  • a preferred embodiment of the invention is described below. Show
  • Figure 1 an inventive high pressure cleaning device
  • Figure 2 an embodiment of an internal gear pump
  • a drive motor (not shown) is arranged in a housing 1.
  • the drive motor can be an electric motor or an internal combustion engine.
  • a pump is driven by the motor which conveys cleaning liquid from the suction-side liquid inlet 2 of the high-pressure cleaning device to the pressure-side liquid outlet 3 of the internal gear pump.
  • the high-pressure hose 4 with the discharge device 5 is connected to the outlet 3 of the high-pressure cleaning device.
  • the internal gear pump can be a filler-free internal gear pump 6, the internal gear is shown schematically in FIG. 2, the tips of the tooth heads of the external gear internal gear not shown are arranged at the line 7, while the bottoms of the interdental spaces of the internal gear external gear are at the line 8 are located.
  • the internal gear pump can be of the gerotor type with an internal gear driven by the drive shaft 9 and a fixed external gear.
  • the internal gear pump can also be designed as an orbital pump with an internal gear driven by the drive shaft 9 and a fixed external gear. wheel. In an orbital pump, the internal gear moves in a planetary motion around the axis of rotation of the external gear. In internal gear pumps of this type, it is also known to compensate for wear that occurs as a result of relative movements of the sealing surfaces of the gear wheels perpendicular to their axes of rotation and thus for the approach of the same to one another.
  • the internal gear is rotatably supported about the axis of rotation 9.
  • An internal gear pump is preferably used in which the internal gear has one tooth less than the external gear.
  • the internal gear and the external gear of the internal gear pump 6 according to the invention consist of a chromium steel alloy with a chromium content of approximately 15%, a nitrogen content of approximately 0.4% and a molybdenum content of approximately 0.4%.
EP00967843A 1999-10-08 2000-10-06 Appareil de nettoyage a haute pression Expired - Lifetime EP1218640B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948860A DE19948860A1 (de) 1999-10-08 1999-10-08 Hochdruckreinigungsgerät
DE19948860 1999-10-08
PCT/EP2000/009819 WO2001027476A1 (fr) 1999-10-08 2000-10-06 Appareil de nettoyage a haute pression

Publications (2)

Publication Number Publication Date
EP1218640A1 true EP1218640A1 (fr) 2002-07-03
EP1218640B1 EP1218640B1 (fr) 2003-01-15

Family

ID=7925185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967843A Expired - Lifetime EP1218640B1 (fr) 1999-10-08 2000-10-06 Appareil de nettoyage a haute pression

Country Status (8)

Country Link
EP (1) EP1218640B1 (fr)
CN (1) CN1215259C (fr)
AT (1) ATE231219T1 (fr)
AU (1) AU7786200A (fr)
DE (2) DE19948860A1 (fr)
DK (1) DK1218640T3 (fr)
ES (1) ES2189769T3 (fr)
WO (1) WO2001027476A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7556210B2 (en) * 2006-05-11 2009-07-07 S. C. Johnson & Son, Inc. Self-contained multi-sprayer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1270122A (en) * 1969-03-06 1972-04-12 Plessey Co Ltd Improvements in or relating to gear pumps
JPS5837162A (ja) * 1981-08-31 1983-03-04 Toshiba Corp ポンプおよびその製造方法
JPH01246343A (ja) * 1988-03-25 1989-10-02 Daido Steel Co Ltd ステンレス鋼
JPH06336652A (ja) * 1993-05-27 1994-12-06 Agency Of Ind Science & Technol 原子力発電所海水ポンプ用ステンレス鍛鋼
JPH09195004A (ja) * 1995-11-10 1997-07-29 Mitsubishi Heavy Ind Ltd ステンレス鋼
DE19726794A1 (de) 1997-06-24 1999-01-07 Elektra Beckum Ag Wasser-Hochdruckreinigungsgerät
JPH1180911A (ja) * 1997-09-11 1999-03-26 Nippon Steel Corp ポンプインペラ用高純クロム鋼板

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0127476A1 *

Also Published As

Publication number Publication date
ATE231219T1 (de) 2003-02-15
AU7786200A (en) 2001-04-23
EP1218640B1 (fr) 2003-01-15
WO2001027476A1 (fr) 2001-04-19
CN1378621A (zh) 2002-11-06
ES2189769T3 (es) 2003-07-16
CN1215259C (zh) 2005-08-17
DK1218640T3 (da) 2003-02-24
DE19948860A1 (de) 2001-04-12
DE50001121D1 (de) 2003-02-20

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