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WO2016033667A1 - Pompe à moteur à palier flottant refroidie par fluide circulant - Google Patents

Pompe à moteur à palier flottant refroidie par fluide circulant Download PDF

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Publication number
WO2016033667A1
WO2016033667A1 PCT/BR2015/050133 BR2015050133W WO2016033667A1 WO 2016033667 A1 WO2016033667 A1 WO 2016033667A1 BR 2015050133 W BR2015050133 W BR 2015050133W WO 2016033667 A1 WO2016033667 A1 WO 2016033667A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
motor pump
rotor
floating
cooled
Prior art date
Application number
PCT/BR2015/050133
Other languages
English (en)
Inventor
Plinio Luiz ZANOTTO FILHO
Original Assignee
Mundial S/A Produtos De Consumo
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 Mundial S/A Produtos De Consumo filed Critical Mundial S/A Produtos De Consumo
Priority to CA2959206A priority Critical patent/CA2959206A1/fr
Priority to US15/507,148 priority patent/US20170268523A1/en
Publication of WO2016033667A1 publication Critical patent/WO2016033667A1/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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/047—Bearings hydrostatic; hydrodynamic
    • F04D29/0473—Bearings hydrostatic; hydrodynamic for radial 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0633—Details of the 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
    • F04D29/02—Selection of particular materials
    • 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
    • F04D29/046—Bearings
    • F04D29/048—Bearings magnetic; electromagnetic
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to a motor pump, especially a hydraulic motor pump, free from bearings, fan and mechanical sealing, wherein the cooling and the lubrication are made through the fluid itself that is pushed into the motor pump.
  • a motor pump especially a hydraulic motor pump, free from bearings, fan and mechanical sealing, wherein the cooling and the lubrication are made through the fluid itself that is pushed into the motor pump.
  • the configuration of the motor pump enables an increase in the flow-rate in its interior, thus increasing the yield thereof.
  • the motor pump chambers must be isolated from each other, but, in addition to the necessary isolation between the chambers, it is necessary that it is necessary that there is further rotor rotational motion transmission from the rotor. So, for this to be possible,, a number of mechanical devices are required, such as rollers, axis, bearing supports, roller bearings, cooling systems, gaskets, among others.
  • Roller bearings that are usually lubricated by oil or grease, so that there is a reduction of friction and wear between the motor pump parts, have the function of supporting the rotor axis, so that, when the axis is induced by the electromagnetic forces of the stator, it will turn with the aid of the rollers.
  • the rotor in turn, is connected by one of its axis ends to the hydraulic turbine, which has blades that initiate a rotating motion, impelling the fluid upon induction of the rotor.
  • coolers are usually connected to the end of the rotor axis, taking advantage of the rotation thereof to carry out the turning movement.
  • patent PI0103034-5 B1 belonging to Eberle Equipamentos e Processos S.A. describes a simplified motor pump configuration.
  • This patent describes a motor pump where various devices present on the motor pump described before were eliminated, such as the roller bearings, gaskets, axis and the external cooling system.
  • the motor pump exhibits a rotor with one of its ends being coupled to a turbine, forming an integral rotor/turbine assembly. Said assembly is perforated, defining a passage for fluid. In this way, when said motor pump is in operation, the fluid gets into the rotor/turbine assembly after passing through an inlet, reaches the turbine and is impelled toward an outlet.
  • the motor pump of patent PI0103034-5 B1 exhibits simpler manufacture and maintenance, besides being more silent than the ordinary motor pumps, due to the existence of a floating bearing which allows a lesser amount of parts for it assembly.
  • the motor pump as described above exhibits a flow- rate limit, since the fluid must go through a fluid passage defined by the rotor/turbine assembly.
  • the passage diameter defines the limit of fluid that goes through the motor pump, and so there is a loss of fluid-flow, in addition to a loss of impulsion due to the path which the fluid should travel as far as the outlet of the motor pump.
  • the present invention has the objective of presenting a novel configuration of the motor pump, which eliminates the problem of flow- rate restriction of the motor pump described, keeping the circulation of fluid inside the motor pump, thus enabling the floating bearing.
  • This new configuration provides an increase in the flow-rate inside the motor pump, causing the latter to have higher yield.
  • the present invention relates to a motor pump comprising two chambers, the first one being isolated from fluids and the second one defining the fluid passage, with a fluid inlet and a fluid outlet.
  • the stator is located in the first chamber, which in a preferred embodiment is adjacent to the walls that separate the first chamber from the second chamber, so that the fluid that circulates through the second chamber can cool the stator by heat conduction.
  • a rotor and a turbine that operate in conjunction, and which are located at least partly concentrically with respect to the stator.
  • the rotor/turbine assembly is induced electromagnetically by the stator, so as to impel a fluid from the inlet to the outlet.
  • a fluid guide preferably of conical shape, is located at the front end of the rotor/turbine assembly. In this way, when the fluid is impelled into the motor pump, most of the fluid is guided directly to the fluid outlet, while the remaining part is kept inside the motor pump.
  • the portion of fluid that is kept inside the pump creates a fluid film around the rotor/turbine assembly.
  • the centripetal forces generated by the assembly and the hydrostatic forces of said film enable the rotor/turbine assembly to turn with minimum friction, thus providing a floating bearing.
  • the fluid that remains inside the motor pump circulates around the first chamber, cooling the stator by heat conduction, thus eliminating the need from an external cooling system, since the heat exchange between the circulating fluid and the rotor/turbine assembly will cool this assembly, so that the temperature can always remain at desirable levels.
  • the motor pump of the present invention when allow the change of the fluid flow inside the motor pump, provides an increase in the flow-rate in the motor pump, eliminating losses due to flow restriction, which enables the motor pump to exhibit greater yielding.
  • the motor pump of this novel configuration keeps a floating bearing, with a simpler configuration and with lower manufacture cost, eliminating the use of external cooling systems (coolers), as well as roller bearings, axis and mechanical sealing.
  • FIG. 1 a cross-sectional side view of the fluid motor pump according to the present invention
  • FIG. 2a a cross-sectional side view of the rotor/turbine assembly of the fluid motor pump, showing a fluid guide;
  • FIG. 2b a side view of the rotor/turbine assembly of the fluid motor pump, showing where it the cross section of figure 2a;
  • FIG. 3b an orthogonal view of the rotor/turbine assembly
  • - Figure 4 a cross-sectional view similar to that of figure 1, showing the fluid path inside the pump according to the teachings of the present invention
  • FIG. 5 an exploded perspective view of the pump according to the present invention, which enables a clearer visualization of its components;
  • FIG. 1 illustrates a preferred embodiment of the present invention, where one observes a motor pump 10, free from components that are usually found on this type of motor pump, such as roller bearings, external cooling system, axis and mechanical sealing.
  • the present embodiment illustrates a motor pump 10 that comprises a housing 14, preferably made from an injected polymeric material or any other material suitable for the operation conditions of the motor pump 10, which comprises a first chamber 19, isolated from fluids, and a second chamber 17, which defines the fluid path inside the motor pump 10.
  • said motor pump 10 further comprises a fluid inlet 15 and a fluid outlet 16, which are located at a first end A of the motor pump 10.
  • the second chamber 17 there is a solidarity rotor/turbine assembly 11 , which allow the impulse of the fluids that pass through said chamber 17 when it is in rotation.
  • This assembly 11 is bore-through, creating a fluid channel 18, and besides it is made from a polymeric material.
  • a ring 21 for centrifuging fluid at the front end 24 (figure 2a) of the assembly 1 there is a ring 21 for centrifuging fluid and inside this ring 21 there is still a fluid guide 20, preferably a conical one.
  • the housing 14 (figure 1), there is a first chamber 19, which is isolated from the fluids that circulate in the second chamber 17.
  • a stator 12 which induces, by means of a magnetic field, the actuation of the rotary movement of the rotor/turbine assembly 11.
  • the second chamber 17 of the motor pump 10 further comprises a plurality of fluid passages 17.1 , so as to enable the fluid to circulate through it.
  • Said fluid passages 17.1 further enable the fluid to circulate around the first chamber 19, cooling the stator 12 by heat conduction.
  • the rotor/turbine assembly 11 is composed by a ring 21 and a fluid guide 20.
  • the fluid after passing through the inlet 15 of the chamber 17 (figure 1), comes in contact with the fluid guide 20 (figure 2a), restricting the fluid enters in the fluid channel 18 of the rotor/turbine assembly 11, so that most of the fluid goes directly to the fluid outlet 16 (figure 1), due to the rotation forces of the rotor/turbine assembly 11, which impels the fluid with radial force toward the fluid outlet 16.
  • Most of the fluid remains circulating inside the chamber 17 in the fluid passages 17.1.
  • the fluid that remains in the motor pump 10 (circulating fluid other than that led to the outlet 16), after circulating throughout the second chamber 17, goes through the passages 17.1 in opposite direction with respect to the inlet 15, gets into the rotor/turbine assembly 11 (as indicated by the arrows S), goes through a fluid channel 18, the inlet of which is located at a second end B of the motor pump.
  • the fluid from the channel 18 follows toward at least one outlet 22 present at the front end 24 of the rotor/turbine assembly 11, reaches the ring 21 , which is in rotary movement, being impelled toward the fluid outlet 16.
  • the rotor/turbine assembly 11 is kept in a position out of contact with the walls of the second chamber 17, by said hydrostatic pressure of the film 13, it is the magnetic field emitted by the stator 12 that chiefly keeps the assembly 11 in a balance position around its axis, through the generated electric magnetic force E.
  • the electromagnetic force E alone is not sufficient to keep the assembly 11 in a balance position, since the entry of fluid into the motor pump 10 causes a suction force D contrary to the electromagnetic force E, which tends to displace the assembly 11 toward the fluid inlet 15.
  • the ring 21 has, at its rear part, at least one relief hole 23, as shown in figures 3a and 3b.
  • each of these relief holes 23 is employed, radially equidistant. Through each of these relief holes 23 a fluid flow is created, which brings about a relief force F (axial thrust), contrary to the suction force D, which helps the electromagnetic force E, emitted by the stator 12, to keep the rotor/turbine assembly 11 in axial balance.
  • F axial thrust
  • the chamber 17 has passages 17.1 enabling the fluid to circulate inside the motor pump 10, thus eliminating the need to use lubricating fluids and external cooling systems.
  • the motor pump is composed almost entirely of an injectable polymeric material, there is a reduction of components with respect to the usually known motor pumps, which makes its simplest and most economical to assembly.
  • the motor pump of the present invention exhibits minimum loss of energy, since the fluid circulating inside the motor pump 10 creates a fluid film between the rotor/turbine assembly 11 and the second chamber 17, and the hydrostatic forces and the centripetal forces of the assembly 11 enable the assembly 11 to float (floating bearing), thus reducing friction of said assembly 11 with the walls of the second chamber 17.
  • the space existing between the stator and the rotor is known in the prior art as a gap and is filled with air, while in the present invention this space, besides being filled by a fluid film 13, there is a polymeric layer in the second chamber 17 and in the rotor/turbine assembly 11 and still there are relief holes 23.
  • the combination of the film 13, the polymeric wall and the relief holes 23 guarantees perfect centralization of the stator 12 and of the assembly 11 , as well as a balance position thereof around the axis, so that when the assembly 11 in operation makes a rotational movement the contact of the assembly 11 with the walls of the second chamber 17 is prevented.
  • the motor pump 10 of the present invention is corrosion-proof, since only the surface made from polymeric materials and Series AISI 304 stainless steel will contact the fluid. Moreover, since the motor pump of the present invention uses the circulating fluid itself for cooling, it can be installed at places without ventilation or submerged places.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

La présente invention concerne une pompe à moteur (10) exempte de paliers, de refroidisseur et d'étanchéité mécanique, plus spécifiquement une pompe à moteur hydraulique, qui comprend un boîtier (14) défini par une première chambre (19) isolée des fluides et une deuxième chambre (17). Dans la deuxième chambre (17), il est disposé un ensemble de rotor/turbine intégré (11), le rotor et la turbine étant induits par des forces magnétiques d'un stator (12), qui est situé dans la première chambre (19). Une entrée de fluide (15) et une sortie de fluide (16) sont situés à la même extrémité de la pompe à moteur (10), de sorte que la plupart du fluide propulsé dans la pompe à moteur (10) soit guidé directement vers la sortie (16) à l'aide d'un guide de fluide (20) situé à l'extrémité avant (24) de l'ensemble de rotor/turbine (11), permettant une augmentation dans le débit à l'intérieur de la pompe à moteur (10), ce qui permet d'augmenter le rendement de celle-ci.
PCT/BR2015/050133 2014-09-01 2015-08-31 Pompe à moteur à palier flottant refroidie par fluide circulant WO2016033667A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2959206A CA2959206A1 (fr) 2014-09-01 2015-08-31 Pompe a moteur a palier flottant refroidie par fluide circulant
US15/507,148 US20170268523A1 (en) 2014-09-01 2015-08-31 Floating-bearing motor pump cooled by a circulating fluid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102014021617-0A BR102014021617B1 (pt) 2014-09-01 2014-09-01 Motobomba de mancal flutuante arrefecida por um fluido circulante
BRBR102014021617-0 2014-09-01

Publications (1)

Publication Number Publication Date
WO2016033667A1 true WO2016033667A1 (fr) 2016-03-10

Family

ID=54145501

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2015/050133 WO2016033667A1 (fr) 2014-09-01 2015-08-31 Pompe à moteur à palier flottant refroidie par fluide circulant

Country Status (4)

Country Link
US (1) US20170268523A1 (fr)
BR (1) BR102014021617B1 (fr)
CA (1) CA2959206A1 (fr)
WO (1) WO2016033667A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700038666A1 (it) * 2017-04-07 2018-10-07 Spal Automotive Srl Pompa elettrica.

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WO2019191179A1 (fr) * 2018-03-27 2019-10-03 Nielson Scientific, Llc Systèmes micro-électro-mécaniques, microfluidiques et micro-optiques tridimensionnels
CN208982367U (zh) * 2018-06-01 2019-06-14 崇玮工业股份有限公司 双冷却式电子水泵
CN110081081B (zh) * 2019-04-25 2020-08-28 哈尔滨工业大学 一种应用于液压元件的液磁矢量支撑
CN114483598B (zh) * 2020-11-13 2023-05-16 汉宇集团股份有限公司 一种具有冷却液内循环的离心式屏蔽电机型屏蔽电泵

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FR2768470A1 (fr) * 1997-09-12 1999-03-19 Soc D Mecanique Magnetique Pompe rotative a rotor immerge
DE10115989A1 (de) * 2000-04-04 2001-12-13 Bernhard Stadler Radial-Strömungsmaschine, insbesondere Umwälzpumpe
BR0103034B1 (pt) 2001-07-16 2009-05-05 bomba.
US20100280305A1 (en) * 2008-02-22 2010-11-04 Mitsubishi Heavy Industries, Ltd Blood pump and pump unit

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US2658455A (en) * 1948-02-26 1953-11-10 Laval Steam Turbine Co Impeller with center intake
FR2768470A1 (fr) * 1997-09-12 1999-03-19 Soc D Mecanique Magnetique Pompe rotative a rotor immerge
DE10115989A1 (de) * 2000-04-04 2001-12-13 Bernhard Stadler Radial-Strömungsmaschine, insbesondere Umwälzpumpe
BR0103034B1 (pt) 2001-07-16 2009-05-05 bomba.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700038666A1 (it) * 2017-04-07 2018-10-07 Spal Automotive Srl Pompa elettrica.
WO2018185719A1 (fr) * 2017-04-07 2018-10-11 Spal Automotive S.R.L. Pompe électrique
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Also Published As

Publication number Publication date
BR102014021617A2 (pt) 2016-04-26
US20170268523A1 (en) 2017-09-21
BR102014021617B1 (pt) 2023-04-11
CA2959206A1 (fr) 2016-03-10

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