US3649131A - Self-priming lateral channel centrifugal pump - Google Patents

Self-priming lateral channel centrifugal pump Download PDF

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Publication number
US3649131A
US3649131A US51918A US3649131DA US3649131A US 3649131 A US3649131 A US 3649131A US 51918 A US51918 A US 51918A US 3649131D A US3649131D A US 3649131DA US 3649131 A US3649131 A US 3649131A
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US
United States
Prior art keywords
suction chamber
pump
port
ribs
impeller
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.)
Expired - Lifetime
Application number
US51918A
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English (en)
Inventor
Hagemann Walter
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.)
Siemen and Hinsch GmbH
Original Assignee
Siemen and Hinsch 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 Siemen and Hinsch GmbH filed Critical Siemen and Hinsch GmbH
Application granted granted Critical
Publication of US3649131A publication Critical patent/US3649131A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • ABSTRACT Foreign Application Priority Data
  • One of the ribs extends radially inwardly of the suction [58] Field of Search ..4l5/53 T, 213 T, 217, 182, chamber and the other radially outwardly from the inner re- 415/183, 184, 185 gion of the chamber.
  • the ribs are circumferentially spaced and both extend the entire axial width of the suction chamber and about half the radial depth of the chamber.
  • the invention a self-priming lateral channel centrifugal pump with horizontal shaft, a pump inlet situated on the underside and pointing downwards, an annular suction chamber, a port from the suction chamber to the pumping area of the pump, situated to the side of the impeller and on a level with or lower than the shaft and with a dividing wall in the suction chamber, placed between the pump inlet and the port to the pumping area.
  • the pump covered by the invention is primarily for application in tanks with a dispenser pump for the pumping of automotive fuels, where these have to be pumped up from underground containers.
  • a simple pump design with a fitting that is uncomplicated and that does not take up too much room is necessary.
  • a simple pipe system working at low deformation with as few connections in the pump system as possible is desirable in order to reduce leakage losses of the pumping substance in the dispensing pump.
  • the pump must be selfpriming without the use of additional auxiliary pumps (e.g., hand pump), valves or nonreturn flaps even for the pumping of fuels that easily gasify; this means that the pump must at any time suck up the gases or vapor of the pumping substance in the pump and the connected pipes after the pump has been filled once, even after considerable periods of shutdown, commence pumping the fluid after the gas has been sucked up and be in a position to pump fluid containing gas without difficulty or interruption.
  • additional auxiliary pumps e.g., hand pump
  • valves or nonreturn flaps even for the pumping of fuels that easily gasify
  • the aim was to construct a simple design for a self-priming lateral channel centrifugal pump with horizontal shaft, and with a pump inlet situated on the underside and pointing downwards, so that this inlet can be flanged directly onto the intake line leading down to the underground container without the insertion of the pipe bends or other pipe fittings.
  • This positioning of the pump inlet means, however, that after switching the pump off, the greater proportion of the fluid contained in the pump casing flows back into the tank and is thus no longer available for further priming of the pump; this means that special measures are necessary to achieve the ability to self-prime.
  • a self-priming lateral channel centrifugal pump is known in that form that the pump inlet is situated, as is usual, on the top side which does not enable a simple intake line from an underground container to the pump inlet, but requires, for example, two quarter bends in the intake line.
  • the positioning of the pump inlet on the top side makes it possible that, after the pump has been switched off and the transport fluid falls back into the tank, a sufficient quantity of fluid remains in the pump.
  • the solution of the named disadvantages according to the invention is that the pump inlet situated on the underside of the pump leads straight into the suction chamber and that in the inflow direction two ribs are fitted in the suction chamber a short distance before the port; one rib is fitted inthe inner radial area, the other in the outer radial area of the suction chamber. Both ribs cover the entire axial width and about half the radial cross section of the suction chamber.
  • This positioning of the pump inlet facilitates a feed system with little deformation and with few joints that is easily installable; the placing of the two ribs in front of the port enables good self-priming without the use of nonreturn flaps, valves or similar devices in spite of the fact that the pump inlet points downwards.
  • the ribs situated in the inner radial area of the suction chamber to be placed first in the direction of flow and for the rib situated in the outer radial area of the suction chamber to follow since a part of the operational fluid supply that is spun out of the port into the suction chamber by the impeller during the removal of air from the system is-caught directly by the outer radial rib and fed back to the pumping area through the port.
  • both ribs in front of the port be inclined towards this and/or be bent at their radial free end towards the port since the ribs feed the operational fluid that is spun out during the removal of air from the system back to the port and the pumping area as described above, whereas, on the other hand, in normal fluid pumping where the fluid flows from the pump inlet to the port the ribs are. shaped to further flow; this also effects a favorable flow of the impeller segments, so that a better Ah value is provided by the ribs than is to be found in a pump without ribs.
  • the invention proposes that the lateral channel be situated on that side of the impeller away from the port leading from the suction chamber to the pumping area.
  • FIG. shows an overall view
  • FIG. 2 and FIG. 3 each show an interior view of the suction chamber of the pump on the Section A-B as in FIG. 1.
  • FIG. 4 is a section through the casing of the pump on the Section CD in FIG. 3.
  • the arrows with solid lines show the route of the pumping material.
  • the self-priming lateral channel centrifugal pump 1 in FIG. 1 is in this instance equipped with an elastic motor 2 and shows the pump inlet 3 situated on the underside.
  • FIG. 2 shows the part of the casing 4 containing the pump inlet 3 with horizontal shaft 5, annular suction chamber 6 and the port 8 situated to the side of the impeller 7.
  • the shorter, direct route of the pumping medium from the pump inlet to the port is barred by a dividing wall 9 in the annular suction chamber, so that the flow has to pass the ribs 10 and 11 situated in front of the port.
  • FIG. 3 shows another version of the invention with the same key numbers for the pump components as in FIG. 2.
  • the pump inlet 3 and the ribs 10 and 11 are situated differently in comparison with FIG. 2 and the arrow with a broken line on the impeller 7 shows its direction of rotation if this is opposed to the direction of flow in the annular suction chamber.
  • FIG. 4 is a cross section on the line CD in FIG. 3 through the pump casing showing the rib ll partially in section, the rib l0 and the dividing wall 9 in elevation.
  • the port 13 from the lateral channel 12 to the pressure chamber of the pump is situated in the lower part of the pump, the lateral channel 12 is situated on that side of the casing 4 away from the impeller 7, while the dividing wall 9 and the ribs 10 and 11 are sealed off laterally by the casing wall 14.
  • the invention is not restricted to the pumps for tank systems described above. It can be applied in any circumstances where similar requirements have to be met in respect of the arrangement of the pump inlet and of saving space in self-priming pumps.
  • a self-priming lateral channel centrifugal pump comprising a horizontal shaft, an impeller mounted on said shaft for rotation therewith, and an intake casing having an annular suction chamber, said casing having a wall separating said chamber from said impeller, a port formed in said wall for directing fluid from said suction chamber to said impeller, said port extending below the level of said shaft, a pump inlet provided in the lower part of said suction chamber, a dividing wall extending transversely in said suctionchamber below said port for preventing fluid entering said inlet from flowing directly to said port, a pair of ribs formed in said suction chamber slightly in advance of said port in the direction of travel of the fluid, one of said ribs extending radially inwardly from the radially outer region of said suction chamber and the other of said ribs extending radially outwardly from the radially inner region of said chamber, both of said ribs extending the entire axial width of said suction chamber and about half the radial depth of said chamber

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US51918A 1969-07-05 1970-07-02 Self-priming lateral channel centrifugal pump Expired - Lifetime US3649131A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691934168 DE1934168B2 (de) 1969-07-05 1969-07-05 Selbstansaugende seitenkanal kreiselpumpe

Publications (1)

Publication Number Publication Date
US3649131A true US3649131A (en) 1972-03-14

Family

ID=5738974

Family Applications (1)

Application Number Title Priority Date Filing Date
US51918A Expired - Lifetime US3649131A (en) 1969-07-05 1970-07-02 Self-priming lateral channel centrifugal pump

Country Status (9)

Country Link
US (1) US3649131A (de)
AT (1) AT296768B (de)
BE (1) BE752772A (de)
CH (1) CH503908A (de)
DE (1) DE1934168B2 (de)
ES (1) ES381428A1 (de)
FR (1) FR2054147A5 (de)
GB (1) GB1257897A (de)
NL (1) NL7009983A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040009058A1 (en) * 2002-07-11 2004-01-15 Nikkiso Co. Ltd. Self priming regenerative pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014425C2 (de) * 1980-04-15 1986-06-12 Friedrich 8541 Röttenbach Schweinfurter Seitenkanalpumpe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1269063A (en) * 1915-06-02 1918-06-11 Henry R Worthington Centrifugal pump.
US2051080A (en) * 1935-11-20 1936-08-18 Rheuel H Frederick Centrifugal pump
US3252421A (en) * 1962-10-16 1966-05-24 Siemen & Hinsch Gmbh Pumps
US3462949A (en) * 1965-09-13 1969-08-26 Caterpillar Tractor Co Noise reducing enclosure for a gas turbine engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1269063A (en) * 1915-06-02 1918-06-11 Henry R Worthington Centrifugal pump.
US2051080A (en) * 1935-11-20 1936-08-18 Rheuel H Frederick Centrifugal pump
US3252421A (en) * 1962-10-16 1966-05-24 Siemen & Hinsch Gmbh Pumps
US3462949A (en) * 1965-09-13 1969-08-26 Caterpillar Tractor Co Noise reducing enclosure for a gas turbine engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040009058A1 (en) * 2002-07-11 2004-01-15 Nikkiso Co. Ltd. Self priming regenerative pump
US6974301B2 (en) * 2002-07-11 2005-12-13 Nikkiso Co., Ltd. Self priming regenerative pump

Also Published As

Publication number Publication date
AT296768B (de) 1972-02-25
ES381428A1 (es) 1972-11-16
NL7009983A (de) 1971-01-07
BE752772A (fr) 1970-12-01
GB1257897A (de) 1971-12-22
DE1934168A1 (de) 1971-01-14
DE1934168B2 (de) 1971-12-09
FR2054147A5 (de) 1971-04-16
CH503908A (de) 1971-02-28

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