WO2015095848A1 - Plaques-couvercles pour pompes centrifuges - Google Patents

Plaques-couvercles pour pompes centrifuges Download PDF

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Publication number
WO2015095848A1
WO2015095848A1 PCT/US2014/071757 US2014071757W WO2015095848A1 WO 2015095848 A1 WO2015095848 A1 WO 2015095848A1 US 2014071757 W US2014071757 W US 2014071757W WO 2015095848 A1 WO2015095848 A1 WO 2015095848A1
Authority
WO
WIPO (PCT)
Prior art keywords
coverplate
pump
centrifugal pump
orifice
flange
Prior art date
Application number
PCT/US2014/071757
Other languages
English (en)
Inventor
Frank Joseph HERMMEN, JR.
James Allen JOHNSON
Original Assignee
International Pump Solutions, Inc.
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 International Pump Solutions, Inc. filed Critical International Pump Solutions, Inc.
Publication of WO2015095848A1 publication Critical patent/WO2015095848A1/fr

Links

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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid 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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49243—Centrifugal type

Definitions

  • Embodiments of the invention relate to centrifugal pumps, and in particular to centrifugal pumps used with fracturing blenders.
  • Centrifugal pumps such as but not limited to National Oilwell Varco's Magnum XL and XP pumps and Mission's Magnum XP pumps are commonly used on fracturing blenders to pump materials that are used in hydraulic fracturing. These pumps typically pump materials that include sand and other abrasive or corrosive materials.
  • Conventional assemblies connecting the suction piping to the pump include, for example, a suction flange, gasket, and a separate spool piece that is between the gasket and a suction cover.
  • Inventors of the present invention recognize that one or more of the foregoing may cause the premature failure of the suction flange or suction cover, leaks in the piping, or erosion of the impeller from the pre-rotating fluid.
  • Embodiments of the invention are directed to addressing one or more of the foregoing problems.
  • Embodiments of the invention extend the viability of centrifugal pumps commonly used by fracturing blenders, for example.
  • Embodiments include, for example, a coverplate adapted to be attached to a centrifugal pump and piping of the fracturing blender.
  • the coverplate can include a substantially cylindrical body of a first and second sides having an outer surface with a circumferential outer rim that substantially surrounds the outer surface.
  • the substantially cylindrical body can also surrounding an orifice with an at least partially tapered diameter that decreases from the first side to the second side.
  • the first side of the coverplate includes, for example, a substantially circular face that at least partially tapers toward the second side (e.g., the center of the coverplate) and adapted to be positioned at least partially within a centrifugal pump when the coverplate is attached to the centrifugal pump.
  • the second side of the coverplate can include an integral flange extending outwardly therefrom away from the first side and the pump when the coverplate is attached to the pump.
  • the flange of the second side circumscribed by a circumferential groove adapted to facilitate attachment of the coverplate to a suction pipe using a clamp coupling.
  • the outer rim of the first and second sides having a plurality of apertures adapted to receive connecting members to facilitate the coverplate attaching to the centrifugal pump.
  • Embodiments of the invention include methods of attaching the coverplate to a pump and operating the pump with the coverplate attached thereto.
  • the method comprising, for example, the steps of positioning the coverplate such that at least part of a first side of the coverplate is positioned within a centrifugal pump, the first side of the coverplate having a substantially circular face that at least partially tapers, and attaching the coverplate to the centrifugal pump using one or more connection members.
  • the method embodiments can further comprise the steps of mounting the centrifugal pump to a fracturing truck and attaching piping of the fracturing blender to the second side of the coverplate.
  • Method embodiments can also include, for example, operating the pump with the coverplate attached thereto, the coverplate having a substantially cylindrical body surrounding an orifice with an at least partially tapered diameter, and an integral flange. Pumped materials pumped by the pump flowing from the piping, though the orifice of the coverplate and to the pump intake of the pump.
  • Fig. 1 is a side cross sectional view of the coverplate according to an embodiment of the invention.
  • Fig. 2 is an enlarged cross-sectional side view of the portion of the coverplate of Fig. 1 indicated by area 2, including a circumferential groove of the coverplate.
  • Fig. 3 is an isometric view of a first side of the coverplate of Fig. 1, according to an embodiment of the invention.
  • Fig. 4 is an isometric view of the coverplate attached to a centrifugal pump according to an embodiment of the invention.
  • Embodiments of the invention extend the viability of centrifugal pumps commonly used by fracturing blenders by utilizing, for example, a coverplate 10 with an integrated flange 402.
  • Conventional assemblies connecting the suction piping to the pump include, for example, a separate suction flange, gasket, and a separate spool piece that is between the gasket and a suction cover.
  • the inside diameter of conventional suction piping is approximately 12.5 inches and the inside diameter of the suction flange on conventional assemblies on the pump entrance is approximately 13.5 inches.
  • the inventors recognize that when materials are pumped through this space, this sudden enlargement in piping causes one or more eddy currents that are rotating counter to the flow coming into the pump which causes a concentration of sand to mill at the weld joint area and gasket joint areas.
  • the erosion is further compounded, the inventors recognize, by the lack of laminar flow entering the impeller.
  • the pre-rotating fluid moves the eddy currents in a circular motion with the pump's rotation, which results in erosion of the suction flange outward across the gasket surface and the flange welds.
  • Inventors of the present invention recognize that one or more of the foregoing may cause the premature failure of the suction flange or suction cover, leaks in the piping, or erosion of the impeller from the pre-rotating fluid.
  • Embodiments of the invention are directed at addressing one or more of the foregoing problems thereby extending the viability of the pump.
  • Embodiments of the coverplate 10 can be attached to centrifugal pumps 400 such as, but not limited to, National Oilwell Varco's Magnum XL and XP pumps and Mission's Magnum XP pumps.
  • the pump 400 can be mounted on a fracturing truck to pump material that are used in hydraulic fracturing.
  • Embodiments of the coverplate can also be attached to a pump mounted to a trailer mounted fracturing blender or a skid mounted fracturing blender. Because of the abrasive materials that are pumped in hydraulic fracturing, the coverplate is cast from a material that is suitable for the application of abrasive and erosive materials.
  • the coverplate 10 is cast from substantially the same material as the pump 10 such as, for example, high chrome alloy.
  • the integrated flange 402 is long enough to facilitate a fourteen inch (14") clamped coupling, such as a clamped coupling made by Victaulic®, to the fracturing blender's 14" inches, schedule 80 pound piping.
  • embodiments of the invention eliminate the need for the separate spool piece that is between the flange gasket and suction cover in conventional arrangements.
  • Fig. 1 illustrates a cross-section of the coverplate 10 according to an embodiment of the invention.
  • the coverplate 10 includes, for example, a substantially cylindrical body 128 having an outer surface with a circumferential outer rim 210.
  • the substantially cylindrical body 128 surrounds an orifice 122 that extends from a first side 100 of the coverplate to a second side 200 and vice versa.
  • the orifice 122 has a tapered inner surface 120 that decreases from the first side 100 to the second side 200.
  • an inside diameter 104 of the orifice 122 at the first side can be approximately 13.386 inches
  • an inside diameter 124 of the orifice at the second side can be approximately 12.500 inches according to an embodiment of the invention.
  • the inside diameter 124 of the orifice at the second side is approximately the same as the inside diameter of the piping.
  • the smooth and gradual taper 120 of the orifice 122 (and integral flange) enables a gradual taper into the suction entrance of the pump when the coverplate is attached to the pump. This provides a smooth and gradual curvature to promote laminar flow, so that there are fewer to no areas where solids such as sand can be trapped out of the pump's flow and mill holes into the internal components.
  • Embodiments of the present invention reduce the occurrence of eddy currents and improves laminar flow through the pump entrance, which in turn reduces the occurrence of erosion damage and extends the life and dependability of the pump.
  • the first side 100 of the coverplate 10 is adapted to attach to the centrifugal pump 400, and the second side 200 is adapted to attach to piping of a fracturing blender trailer using a clamp coupling.
  • Fig. 3 illustrates an embodiment of the first side 100 of the coverplate 10 according to an embodiment of the invention. As illustrated in Fig. 3, the first side 100 can have a substantially circular face 208 that at least partially tapers towards the second side (e.g., tapers towards the center of the coverplate). In Fig. 1, a cross section of the tapered face 208 is shown, including the taper 114.
  • the substantially circular face 208 of the first side 100 is adapted to be positioned at least partially within the centrifugal pump 400 when the coverplate is attached to the centrifugal pump 400.
  • the outer rim 210 that substantially surrounds the substantially circular face 208 can include a plurality of apertures 202 through the first 100 and second 200 sides adapted to receive connecting members 204 (shown in Fig. 4) when the coverplate 100 is attached to the centrifugal pump 400.
  • a gasket may be positioned between the first side 100 of the coverplate 100 and the pump to facilitate attaching the coverplate to the pump. In this configuration, the coverplate 100 and the pump 450 may not be directly engaged, and are nevertheless still attached to one another, albeit with the gasket in between.
  • Embodiments of the invention eliminate the need for a separate spool piece that is between the flange gasket and the suction cover currently used in conventional assemblies.
  • an outer edge of the substantially circular face 208 can have a diameter 106, and the substantially circular face 208 can be circumscribed by a step 118.
  • the diameter 108 of the coverplate 10 on the opposite side of the step 118 from the substantially circular face 208 can be slightly larger than the diameter 106 of the outer edge of the substantially circular face 208.
  • the diameter 106 can be about 22.094 inches, while the diameter 108 can be about 23.122, although any appropriate dimensions can be used depending on the size of the pump and other considerations.
  • This step 118 engages with one or more surfaces of the pump to facilitate attaching the coverplate to the pump.
  • the substantially circular face 208 is positioned, for example, adjacent to the impeller 406 of the pump when the coverplate is attached to the pump and the outer rim 210 of the first side is attached to the outer surfaces of the pump using one or more connection members 204.
  • Fig. 4 illustrates the coverplate 100 attached to a centrifugal pump 400 according to an embodiment of the invention.
  • Fig. 4 also illustrates the second side 200 of the coverplate according to an embodiment of the invention.
  • the second side 200 can include, for example, an integral flange 402 extending outwardly away from the first side 100 and facing outwardly from the pump 400 when the coverplate is attached to the pump 400.
  • the flange 402 is circumscribed by a circumferential groove 112 that is adapted to facilitate attachment of the coverplate to the piping using a clamp coupling so that the pipe can be positioned substantially perpendicular to the impeller 406 of the pump.
  • Fig. 2 illustrates a close up of the circumferential groove 112 according to an embodiment of the invention.
  • the outer rim 210 of the second side 200 also includes the plurality of apertures 202 adapted to receive connection members 204 to attach the coverplate 10 to the pump 400.
  • Connection members 204 can include any known fasteners, such as, for example nuts and bolts as shown, or any other appropriate fastener.
  • the second side 200 of the coverplate 10 can also include a plurality of partial apertures that do not go through the first side 100 of the coverplate.
  • the plurality of partial apertures can be can be, for example, polygon shaped and can further be radially spaced. According to an embodiment of the invention, the plurality of partial apertures reduce the weight of the coverplate.
  • Fig. 1 also illustrates a cross section of the integral flange 402.
  • the base of the flange 412 is tapered as illustrated by the angle 102, for example, illustrated in Fig. 1.
  • the outside diameter of the flange 402 can also taper such that it decreases gradually as the flange extends away from the base 412 of the flange 402.
  • the outside diameter 126 of the flange at an outer end 413 can be smaller than the outside diameter 127 at the base 412 of the flange 402.
  • the flange 402 circumferentially surrounds at least part of the orifice 122 so that materials (e.g., solids and fluid) are pumped through the piping, through the flange 402 of the second side and into the pump intake 404 and impeller 406 of the pump and eventually out the pump outtake 410.
  • materials e.g., solids and fluid
  • Embodiments of the coverplate may further include a flow straightening vane that is cast into the inside diameter of the coverplate and is adapted to significantly reduce pre- rotation at the entrance of the pump.
  • the straightening vane may also be positioned within the orifice of the coverplate.
  • the straightening vane is cast from the same material as the coverplate 10 and is shaped in a substantially straight line.
  • the straightening vane can be solid and have a relative small thickness and width.
  • the straightening vane according to embodiments of the present invention further stabilizes laminar flow to the pump entrance and thereby reduces the occurrence of erosion to the impeller.
  • Embodiments of the invention also include a method of attaching a coverplate 10 to a centrifugal pump 10 and operating the centrifugal pump 400 with a coverplate 10 attached thereto.
  • Method embodiments can comprise the step of, for example, positioning the coverplate such that at least a part of a first side 100 of the coverplate is positioned within the pump 400.
  • the substantial circular face 208 on the first side may be positioned within the pump 400 and facing the impeller 406 of the pump.
  • the substantially circular face 208 may be at least partially tapered towards the center of the coverplate.
  • Method embodiments can also include the step of attaching the coverplate 10 to the pump using one or more connection members 204 such as bolts.
  • a substantially cylindrical body 128 includes, for example, a circumferential outer rim 210 on the first and second sides 100, 200.
  • the outer rim 210 includes apertures through the first and second sides 100, 200 adapted to receive the one or more connection members 204.
  • an outer surface of the outer rim 210 on the first side 100 attaches to an outer surface of the pump 400, and the substantially cylindrical body 128 is positioned at least partially within the pump.
  • the second side 200 of the coverplate 10, including the integral flange 402 faces outwardly from the pump 400 when attached thereto.
  • a gasket can be placed between the coverplate 10 and the pump 400 to prevent leakage when materials such as hydrocarbons, sand, and other materials that are pumped in hydraulic fracturing, for example, flow through the orifice 122 of the coverplate and to the pump intake 404.
  • embodiments of the invention eliminate the need, for example, for a separate spool piece that is used in conventional arrangements.
  • Method embodiments can also include the step of attaching a pipe of a fracturing blender to the flange 402 using a clamp coupling.
  • the second side 200 of the coverplate 10 includes, for example, an integral flange 402 that extends outwardly from the pump when attached thereto.
  • the flange 402 is circumscribed by a circumferential groove 112 that engages with the piping using the clamp coupling or other fastener means.
  • a 14 inch clamp coupling made by Victaulic® can be used to attach a fracturing blender' s pipe to the flange 402 of the coverplate.
  • the pipe connected to the flange 402 can have an outside diameter of approximately 14 inches and schedule 80 pounds.
  • the outside diameter 126 of the flange can also be approximately 14 inches according to this exemplary embodiment.
  • Method embodiments can also include, for example, mounting the pump to one or more of the following: a trailer mounted fracturing blender, a skid mounted fracturing blender, and a truck mounted fracturing blender.
  • the coverplate can be attached to the pump before or after mounting the pump to the fracturing blender.
  • Method embodiments can also include the step of operating the pump 402 with the coverplate 10 and pipe attached thereto.
  • the flange 402 of the coverplate circumferentially surrounds at least part of the orifice 122 so that materials are pumped through the piping, through the flange 402 of the second side and into the pump intake 404 and impeller 406 of the pump, and eventually out the pump outtake 410.
  • the orifice 122 has a tapered inner surface 120 that decreases in diameter from the first side 100 to the second side 200.
  • an inside diameter 104 of the orifice at the first side 100 can be approximately 13.386 inches
  • an inside diameter 124 of the orifice at the second side 200 can be approximately 12.500 inches according to an embodiment of the invention.
  • the diameter 124 of the orifice 122 at the second side 200 that connects to the piping is approximately the same as the inside diameter of the piping.
  • the smooth and gradual taper of the inner surface 120 of the orifice 122 (and integral flange) enables a gradual taper into the suction entrance of the pump when the coverplate is attached to the pump.
  • Embodiments of the present invention reduce the occurrence of eddy currents and improves laminar flow through the pump entrance, which in turn reduces the occurrence of erosion damage and extends the life and dependability of the pump.
  • the coverplate 10 can further include a straightening vane positioned within the orifice 122 to further improve laminar flow to the pump.

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

Abstract

Des modes de réalisation de l'invention étendent la viabilité de pompes centrifuges couramment utilisées par des mélangeurs de fracturation grâce à l'utilisation, par exemple, d'une plaque-couvercle dotée d'une bride intégrée. La plaque-couvercle est conçue pour être fixée à la pompe et aux conduits du mélangeur de fracturation. La plaque-couvercle peut comprendre un corps sensiblement cylindrique de premier et second côtés ayant une surface extérieure avec un rebord extérieur circonférentiel qui entoure sensiblement la surface extérieure. Le corps sensiblement cylindrique peut également entourer un orifice. Le premier côté de la plaque-couvercle comprend, par exemple, une face sensiblement circulaire qui rétrécit au moins partiellement, le second côté comprend la bride intégrée avec une rainure circonférentielle et s'étend vers l'extérieur loin du premier côté. Des modes de réalisation de l'invention comprennent également des procédés de fixation de la plaque-couvercle à la pompe et au conduit et de fonctionnement de la pompe à laquelle est fixée la plaque-couvercle.
PCT/US2014/071757 2013-12-20 2014-12-20 Plaques-couvercles pour pompes centrifuges WO2015095848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361919274P 2013-12-20 2013-12-20
US61/919,274 2013-12-20

Publications (1)

Publication Number Publication Date
WO2015095848A1 true WO2015095848A1 (fr) 2015-06-25

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ID=53399528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/071757 WO2015095848A1 (fr) 2013-12-20 2014-12-20 Plaques-couvercles pour pompes centrifuges

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US (1) US20150176599A1 (fr)
WO (1) WO2015095848A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736468B (zh) * 2016-04-01 2018-04-17 江阴市农业药械厂 一种蜗壳取风结构
CN110259727A (zh) * 2019-07-09 2019-09-20 中国航发哈尔滨东安发动机有限公司 一种燃气轮机压气机蜗壳结构
LU500240B1 (de) * 2021-06-02 2022-12-02 Wilo Se Abwasserkreiselpumpe zur Tiefabsaugung gesammelten Abwassers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433589A (en) * 1939-05-25 1947-12-30 Nash Engineering Co Pump
US2994732A (en) * 1959-03-25 1961-08-01 Gen Electric Pump enclosure assembly
US4496281A (en) * 1977-04-29 1985-01-29 Klockner-Humboldt-Deutz Ag Centrifugal pump
US4886367A (en) * 1988-05-27 1989-12-12 Halliburton Company Apparatus for adding a selected additive into a mixture

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1489571A (en) * 1922-01-06 1924-04-08 R G Wright & Co Centrifugal pump
US1697202A (en) * 1927-03-28 1929-01-01 American Manganese Steel Co Rotary pump for handling solids in suspension
US4159180A (en) * 1978-02-21 1979-06-26 Halliburton Company Ground fed blender

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433589A (en) * 1939-05-25 1947-12-30 Nash Engineering Co Pump
US2994732A (en) * 1959-03-25 1961-08-01 Gen Electric Pump enclosure assembly
US4496281A (en) * 1977-04-29 1985-01-29 Klockner-Humboldt-Deutz Ag Centrifugal pump
US4886367A (en) * 1988-05-27 1989-12-12 Halliburton Company Apparatus for adding a selected additive into a mixture

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