US3232235A - Pump - Google Patents
Pump Download PDFInfo
- Publication number
- US3232235A US3232235A US318866A US31886663A US3232235A US 3232235 A US3232235 A US 3232235A US 318866 A US318866 A US 318866A US 31886663 A US31886663 A US 31886663A US 3232235 A US3232235 A US 3232235A
- Authority
- US
- United States
- Prior art keywords
- stages
- group
- stage
- pump
- chamber
- 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
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0072—Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
Definitions
- the general object of the invention is to provide a multiple stage pump having valving means which may be set so that the pump can operate with the same efiiciency at either full capacity and half the total developed head or at half capacity and full total developed head.
- the pump is constructed with two groups of multiple stages, each group having the same number of stages.
- suitable valving which may be set to connect the two groups of stages to operate either in series or in parallel.
- FIGURE 1 is a vertical axial section through a pump in accordance with this invention
- FIGURE 2 is a partial vertical cross-section taken on the plane 2-2 of FIGURE 1;
- FIGURE 4 is a partial vertical cross-section taken on the plane 44 of FIGURE 1;
- FIGURES 2 to 5 various details of the pump structure have been omitted for simplicity and since these figures are provided solely to illustrate the internal passages.
- impellers and diffusers operate in the conventional manner of a centrifugal pump.
- the impellers, the diaphragms and the diffusers are held in the assembled relationship between the heads 20 and 22 as shown in FIGURE 1 by suitable securing means, which are well known in the art and need not be described in detail.
- the pump casing 10 is provided with a body portion 42 extending axially beneath cylindrical chamber 18.
- body portion 42 has a centrally located, axially extending cylindrical portion 44 containing an internal sleeve 46 defining a cylindrical chamber 48.
- a relief is provided between portion 44 and sleeve 46 for machining purposes.
- FIGURES 2 to 5 there is formed a pair of longitudinally extending chambers 50 externally of and on either side of cylindrical portion 44 and sleeve 46.
- One end of the axial chambers 50 is defined by a transversely extending wall portion 51 and the other end is defined by the right end of body portion 42 as is shown in FIGURE 1.
- passages 49 are provided in the bottom of the wall definingpump chamber 18. These passages 49 provide communication between the discharge of stage 6 and chambers 50. As shown in FIGURE 3, circumferentially spaced, axially extending ribs 53 are provided to support the sealing piston rings around the stage diaphragms.
- the body portion 42 is also constructed to define a chamber 52 in communication with the discharge of stage 3.
- This chamber 52 is defined by a pair of transversely extending axially spaced walls 54 and 56 joined by a pair of longitudinally extending walls 58 and 60 on opposite sides of sleeve 46.
- the cylindrical portion 44 terminates at wall 58 whereby the sleeve 46 is not provided with any outer enclosure in the region of chamber 52 as is shown in FIGURE 4.
- the chamber 52 extends axially the length of the discharge chamber of stage 6 and to enclose a plurality of circumferentially spaced ports 62 in sleeve 46.
- the ports 62 provide communication between chamber 52 and chamber 48 within sleeve 46 as is best shown by referring to FIGURES l and 4.
- the pump is provided with a common inlet connection 70 which communicates with a pair of inlet channels 72 and 74.
- Channel 72 comprises an axially extending portion defined by an arcuate member 76 supported beneath body portion 42 and an inwardly extending portion defined by casing 10 and communicating with the suction of stage 1.
- Inlet connection 74 communicates with the suction of stage 4 by way of a valve chamber 78 located between a pair of valve seats 86 and 82. The control of flow through the valve chamber 78 will be described more fully hereafter.
- stem 96 extends through suitable sealing means 98 and is provided with threads 100.
- a re tatable handle 102 threadedly engages the threads 100 and by rotation thereof causes axial movement of the stem 96 between the left-hand position shown in FIGURE 1 and a right-hand position.
- valve member 92 In the left-hand position of the valve element (shown in solid lines in FIGURE 1) valve member 92 is positioned to the left of ports 64 and valve member 94 engages seat 80 to block flow through inlet channel 74 and permit flow from chamber 48 through valve chamber 78 to the suction of stage 4.
- valve member 92 In the right-hand position of the valve elment, (shown in dotted lines in FIGURE 1) valve member 92 is positioned to the right of ports 64 and valve member 94 engages seat 82 to block flow from chamber 48 and permit flow through the inlet channel 74 and valve chamber '73 to the suction of stage 4.
- valve member 92 Since flow to the right through chamber 48 is blocked by valve member 92, the fluid flows to the left through chamber 48 and valve chamber 78 into the suction of stage 4.
- the valve member 94 blocks any flow from chamber 78 back into the inlet 70 by reason of its engagement with valve seat 8%).
- the fluid After passing through the second group of stages 4, 5 and 6 the fluid passes from the discharge of stage 6 through passages 49 into the discharge chambers 50. From chambers 50 the fluid is discharged from the pump casing through the four discharge nozzles 84, 86, 88 and 90.
- the handle 102 When it is desired to operate the pump at full capacity and half total developed head, the handle 102 is rotated to place the valve element in the right-hand position illustrated in dotted lines in FIGURE 1 whereby the two groups of stages are connected in parallel.
- the fluid enters inlet chamber 70 and is divixzled equally into the UWYO inlet channels 72 and 74.
- the fluid flowing through the inlet channel '72 enters the suction of stage 1 and, after passing through the stages 1, 2 and 3, the fluid enters chamber 52. From chamber 52, the fluid passes through the ports 62 in sleeve 46 and enters the chamber 48.
- inlet chamber 72 enters valve chamber 78 and then the suction of stage 4. This fluid then passes through stages 4, 5 and 6 to the discharge of the latter stage from which the fluid flows through passages 49 into the discharge chambers 50.
- valve eiement comprises a stern and is guided for movement along the axis of said stem, said valve members being mounted in a fixed spaced relation on said stem.
- a multiple stage pump comprising a casing, first and second groups of pump stages contained within said casing, each group including the same number of plural stages, a pump inlet, a first inlet channel within said casing connecting said inlet with the suction of the first stage of the first group of stages, a second inlet channel within said casing connecting said inlet with the suction of the first stage of the second group of stages, first passage means within said casing interconnecting the discharge of the last stage of said first group of stages and the suction of the first stage of said second group of stages, means defining a discharge chamber within said casing, second passage means within said casing interconnecting the discharge of the last stage of said first group of stages and said discharge chamber, third passage means within said casing interconnecting the discharge of the last stage of said second group of stages and said discharge chamber, a valve chamber at the suction of the first stage of said second group of stages, and receiving flow from said second inlet channel and said first passage, a first valve seat through which said inlet channel communicates with said valve chamber, a
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Multiple-Way Valves (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US318866A US3232235A (en) | 1963-10-25 | 1963-10-25 | Pump |
GB37703/64A GB1043757A (en) | 1963-10-25 | 1964-09-15 | Improvements in or relating to multiple stage pumps |
NL6411968A NL6411968A (xx) | 1963-10-25 | 1964-10-14 | |
DE19641528742 DE1528742B1 (de) | 1963-10-25 | 1964-10-21 | Umsteuereinrichtung für wahlweisen Reihen-bzw.Parallelbetrieb von zwei Stufengruppen einer mehrstufigen Kreiselpumpe |
CH1374564A CH426497A (de) | 1963-10-25 | 1964-10-23 | Mehrstufige Pumpe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US318866A US3232235A (en) | 1963-10-25 | 1963-10-25 | Pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US3232235A true US3232235A (en) | 1966-02-01 |
Family
ID=23239880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US318866A Expired - Lifetime US3232235A (en) | 1963-10-25 | 1963-10-25 | Pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US3232235A (xx) |
CH (1) | CH426497A (xx) |
DE (1) | DE1528742B1 (xx) |
GB (1) | GB1043757A (xx) |
NL (1) | NL6411968A (xx) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0248104A1 (de) * | 1986-04-30 | 1987-12-09 | GebràDer Sulzer Aktiengesellschaft | Kreiselpumpe |
ITFI20120272A1 (it) * | 2012-12-05 | 2014-06-06 | Nuovo Pignone Srl | "back-to-back centrifugal pump" |
US20180238332A1 (en) * | 2015-08-10 | 2018-08-23 | Nuovo Pignone Tecnologie Srl | Centrifugal pump |
CN113898591A (zh) * | 2020-06-22 | 2022-01-07 | 格兰富控股联合股份公司 | 离心泵装置 |
US11441577B2 (en) * | 2020-02-06 | 2022-09-13 | Curtiss-Wright Electro-Mechanical Corporation | Apparatus for transferring pressurized fluid in a back-to-back multi-stage pump |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR554326A (fr) * | 1922-07-21 | 1923-06-08 | Rateau Sa | Dispositif de mise en série ou en parallèle des roues de pompes |
DE460986C (de) * | 1926-02-20 | 1928-06-09 | Walter Kropf | Mehrstufige Zentrifugalpumpe, bei welcher aus mindestens je einem Laufrade bestehende Schaltstufen mittels eines ausserhalb des Umfangs des Radkoerpers angeordneten Umschaltorgans hintereinander oder parallel geschaltet werden koennen |
FR873127A (fr) * | 1941-06-17 | 1942-06-30 | Condensation Application Mec | Pompe centrifuge à deux roues pouvant être mises, à volonté, en parallèle ou ensérie |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE295133C (xx) * | ||||
DE275292C (xx) * | ||||
DE340447C (de) * | 1920-07-04 | 1921-09-15 | Sulzer Ag | Mehrstufige Kreiselpumpe, bei welcher die Stufen einzeln oder gruppenweise entweder parallel oder hintereinander geschaltet werden koennen |
-
1963
- 1963-10-25 US US318866A patent/US3232235A/en not_active Expired - Lifetime
-
1964
- 1964-09-15 GB GB37703/64A patent/GB1043757A/en not_active Expired
- 1964-10-14 NL NL6411968A patent/NL6411968A/xx unknown
- 1964-10-21 DE DE19641528742 patent/DE1528742B1/de not_active Withdrawn
- 1964-10-23 CH CH1374564A patent/CH426497A/de unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR554326A (fr) * | 1922-07-21 | 1923-06-08 | Rateau Sa | Dispositif de mise en série ou en parallèle des roues de pompes |
DE460986C (de) * | 1926-02-20 | 1928-06-09 | Walter Kropf | Mehrstufige Zentrifugalpumpe, bei welcher aus mindestens je einem Laufrade bestehende Schaltstufen mittels eines ausserhalb des Umfangs des Radkoerpers angeordneten Umschaltorgans hintereinander oder parallel geschaltet werden koennen |
FR873127A (fr) * | 1941-06-17 | 1942-06-30 | Condensation Application Mec | Pompe centrifuge à deux roues pouvant être mises, à volonté, en parallèle ou ensérie |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0248104A1 (de) * | 1986-04-30 | 1987-12-09 | GebràDer Sulzer Aktiengesellschaft | Kreiselpumpe |
ITFI20120272A1 (it) * | 2012-12-05 | 2014-06-06 | Nuovo Pignone Srl | "back-to-back centrifugal pump" |
WO2014086730A1 (en) * | 2012-12-05 | 2014-06-12 | Nuovo Pignone Srl | Back-to-back centrifugal pump |
KR20150091515A (ko) * | 2012-12-05 | 2015-08-11 | 누보 피그노네 에스알엘 | 백 투 백 원심 펌프 |
US9803644B2 (en) | 2012-12-05 | 2017-10-31 | Nuovo Pignone Srl | Back-to-back centrifugal pump |
US20180238332A1 (en) * | 2015-08-10 | 2018-08-23 | Nuovo Pignone Tecnologie Srl | Centrifugal pump |
US11555496B2 (en) * | 2015-08-10 | 2023-01-17 | Nuovo Pignone Tecnologie Srl | Centrifugal pump |
US11441577B2 (en) * | 2020-02-06 | 2022-09-13 | Curtiss-Wright Electro-Mechanical Corporation | Apparatus for transferring pressurized fluid in a back-to-back multi-stage pump |
CN113898591A (zh) * | 2020-06-22 | 2022-01-07 | 格兰富控股联合股份公司 | 离心泵装置 |
CN113898591B (zh) * | 2020-06-22 | 2024-03-01 | 格兰富控股联合股份公司 | 离心泵装置 |
Also Published As
Publication number | Publication date |
---|---|
CH426497A (de) | 1966-12-15 |
GB1043757A (en) | 1966-09-28 |
NL6411968A (xx) | 1965-04-26 |
DE1528742B1 (de) | 1969-09-11 |
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