Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/18—Rotors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D5/00—Pumps with circumferential or transverse flow
  • F04D5/002—Regenerative pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/04—Shafts or bearings, or assemblies thereof
  • F04D29/041—Axial thrust balancing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/04—Shafts or bearings, or assemblies thereof
  • F04D29/041—Axial thrust balancing
  • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/18—Rotors
  • F04D29/188—Rotors specially for regenerative pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D5/00—Pumps with circumferential or transverse flow

Definitions

• the invention relates to a side channel pump for conveying a medium from an inlet channel to an outlet channel with a driven, rotatable in a pump housing impeller, with at least one arranged in one of the end faces of the impeller rim blade chambers, with at least one disposed in the pump housing, the rim blade chambers opposite , the partially annular channel extending from the inlet channel to the outlet channel, having a rim disposed radially outwardly of the rim of the blade chambers on the face of the impeller, and a peripheral portion of the pump housing and having an annular gap disposed between the rim of the impeller and the portion of the pump housing ,
• Such side channel pumps are often used for example in today's motor vehicles, in particular for conveying fuel or windscreen washer fluid and are known in practice.
• the pump housing is composed of two housing parts, which are kept at a distance from one of the height of the impeller corresponding dimensions having intermediate ring.
• the distance between the impeller and the pump housing is usually only a few hundredths of a millimeter.
• there is a risk of grinding of the impeller on the pump housing which leads to increased friction and a reduction in the efficiency of the side channel pump.
• the risk of grinding the impeller is exacerbated by manufacturing tolerances and by axial forces acting on the impeller.
• Such forces acting on the impeller arise, for example, when the inlet channel is arranged on one end side of the impeller and the outlet channel on the other end side of the impeller.
• the invention is based on the problem, a side channel pump of the type mentioned in such a way that it largely avoids grinding of the impeller on the pump housing.
• the annular gap has at least one pocket for receiving the conveyed medium and that the at least one pocket is formed by an increase in the distance of the edge of the impeller from the opposite portion of the pump housing.
• the impeller experiences during operation of the side channel pump according to the invention through the bag an axial pressurization on the edge, whereby the impeller is kept away from the housing part.
• the position of the pocket ensures that resulting axial forces act on the radially outer edge of the impeller.
• the forces for holding the impeller in an intended position in the pump housing due to the leverage effect are kept particularly low.
• Promoting the medium from one of the pockets to the next pocket as the impeller rotates would result in unnecessary circulation of the medium, and thus its heating and unnecessary energy consumption.
• Such a promotion can be easily avoided according to another advantageous embodiment of the invention, when the distance of adjacent pockets at least equal to the length of a pocket.
• a tilting of the impeller can be particularly greatly reduced according to another advantageous embodiment of the invention, when the pockets are arranged on both end faces of the impeller.
• three pockets are arranged on both sides of the impeller.
• a feed of the pockets with the conveyed medium from the radially outer circumferential gap between impeller and pump housing is particularly simple according to another advantageous development of the invention, when the pockets extend from the edge of the impeller beyond the radial boundary of the impeller.
• This radially outer circumferential gap between the pump housing and the impeller is constantly filled with leakage by the conveyed medium.
• the average pressure which is less than a pump internal pressure and greater than the suction pressure.
• the average pressure differs in almost all angular positions along the part-annular channel from the pressure acting in the annular gap between the impeller and the pump housing. Therefore, the average pressure is particularly suitable to compensate for tilting moments on the impeller.
• the impeller has according to another advantageous embodiment of the invention, a hydraulic bearing, with which it adjusts the distance to the pump housing automatically when the pockets are arranged as depressions in the impeller.
• a balancing in the impeller can be largely avoided according to another advantageous embodiment of the invention, if the pockets are arranged as recesses in the pump housing. Furthermore, tilting moments introduced by the arrangement of the inlet channel and the outlet channel into the impeller can be easily compensated by an uneven arrangement of the pockets over the circumference of the impeller. Of course, pockets may be located in both the impeller and the pump housing.
• the invention allows numerous embodiments. To further clarify its basic principle, two of them are shown in the drawing and will be described below. This shows in
• FIG. 1 shows a longitudinal section through an inventive side tenkanalpumpe with adjacent areas of an electric motor
• FIG. 2 is a sectional view through the side channel pump according to the invention from Figure 1 along the line II - II,
• FIG 3 shows a longitudinal section through a further embodiment of the side channel pump according to the invention.
• the side channel pump 1 shows a longitudinal section through a side channel pump 1 with adjacent regions of an electric motor 2.
• the side channel pump 1 has a rotatable in a pump housing 3 impeller 4.
• the impeller 4 is disposed on a shaft 5 of the electric motor 2.
• the pump housing 3 has two of a ring member 6 at a distance held housing parts 7, 7 'and a jacket 8.
• the ring member 6 is dimensioned such that the housing parts 7, 7' facing the end faces of the impeller 4 at a small distance.
• the jacket 8 holds the side channel pump 1 in a predetermined position relative to the electric motor 2 and biases the housing parts 7, 7 'of the pump housing 3 against the ring element 6.
• an inlet channel 9 is arranged, while the other of the housing parts 7 'has an outlet channel 10.
• the inlet channel 9 and the outlet channel 10 are each connected to in the housing parts 7, 7 'arranged, part-annular channels 11, 12.
• the impeller 4 has rings of blade chambers 13, 14 bounded by guide vanes.
• the partially annular channels 11, 12 form with the blade chambers 13, 14 a delivery chamber leading from the inlet channel 9 to the outlet channel 10
• the impeller 4 has an edge 15 at its front side.
• the side channel pump 1 Between the circumference of the impeller 4 and the ring element 6, the side channel pump 1 has A circumferential gap 16 filled by leakage with the medium to be delivered. Between the edge 15 and the opposite section 17 of the pump housing 3, the side channel pump 1 has an annular gap 18 with widenings 19. The widenings 19 are generated by pockets 20 arranged in the pump housing 3. The spacers 19 extend from the front edge 15 of the impeller 4 to the circumferential gap 16. This ensures that the pockets 20 are constantly filled with the medium to be delivered.
• FIG. 2 shows, in a sectional illustration through the side channel pump 1 from FIG. 1 along the line II-II on the example of one of the housing parts 7 ', that a total of three pockets 20 are arranged over the circumference of the impeller 4. To clarify the radial outer boundary of the impeller 4 is shown in dashed lines in the drawing.
• FIG. 3 shows a further embodiment of the side channel pump 1 according to the invention, which differs from that of FIGS. 1 and 2 only in that pockets 21 of the annular gap are arranged in an impeller 22. Housing parts 23, 23 'of the side channel pump 1, however, have no recesses. Otherwise, the side channel pump 1 is constructed as described for FIGS. 1 and 2.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39110595

Family Applications (1)

Country Status (7)

Families Citing this family (5)

Family Cites Families (15)

• 2006
  • 2006-11-15 DE DE102006053933A patent/DE102006053933A1/de not_active Withdrawn
• 2007
  • 2007-11-14 KR KR1020097012151A patent/KR20090082921A/ko active IP Right Grant
  • 2007-11-14 CN CN2007800426445A patent/CN101548109B/zh not_active Expired - Fee Related
  • 2007-11-14 EP EP07822576A patent/EP2054627A1/de not_active Withdrawn
  • 2007-11-14 JP JP2009536728A patent/JP4852153B2/ja not_active Expired - Fee Related
  • 2007-11-14 WO PCT/EP2007/062316 patent/WO2008058983A1/de active Application Filing
  • 2007-11-14 US US12/513,629 patent/US20100021282A1/en not_active Abandoned

Non-Patent Citations (1)

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