BR102014021617A2 - floating bearing motor pump cooled by a circulating fluid - Google Patents

floating bearing motor pump cooled by a circulating fluid Download PDF

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Publication number
BR102014021617A2
BR102014021617A2 BR102014021617A BR102014021617A BR102014021617A2 BR 102014021617 A2 BR102014021617 A2 BR 102014021617A2 BR 102014021617 A BR102014021617 A BR 102014021617A BR 102014021617 A BR102014021617 A BR 102014021617A BR 102014021617 A2 BR102014021617 A2 BR 102014021617A2
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BR
Brazil
Prior art keywords
fluid
rotor
motor pump
circulating
chamber
Prior art date
Application number
BR102014021617A
Other languages
Portuguese (pt)
Inventor
Plinio Luiz Filho Zanotto
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 BR102014021617A priority Critical patent/BR102014021617A2/en
Publication of BR102014021617A2 publication Critical patent/BR102014021617A2/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/04Shafts or bearings, or assemblies thereof
    • F04D29/046Bearings
    • F04D29/047Bearings hydrostatic; hydrodynamic
    • F04D29/0473Bearings hydrostatic; hydrodynamic for radial pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606Canned motor pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606Canned motor pumps
    • F04D13/0633Details of the bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/02Selection of particular materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/04Shafts or bearings, or assemblies thereof
    • F04D29/046Bearings
    • F04D29/048Bearings magnetic; electromagnetic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/58Cooling; Heating; Diminishing heat transfer
    • F04D29/5806Cooling the drive system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/40Organic materials
    • F05D2300/43Synthetic polymers, e.g. plastics; Rubber

Abstract

Patent Summary: "Circulating fluid-cooled floating motor pump". The present invention relates to a bearing-free motor pump (10), fan and mechanical seal, more specifically to a hydraulic motor pump comprising a housing (14) defined by a first fluid-insulated first chamber (19) and a second chamber (17). In the second chamber (17) is located a solid rotor and turbine assembly (11), which are induced by magnetic forces of a stator (12), which is located in the first chamber (19). a fluid inlet (15) and a fluid outlet (16) are located at the same end of the motor pump (10), so that most fluid driven into the motor pump (10) is directed directly to the outlet (16) with the aid of a fluid driver (20), located at the front end (24) of the rotor and turbine assembly (11), allowing an increase of flow inside the motor pump (10), increasing its efficiency.

Description

Report of the Invention Patent for "FLOATING BEARING MOTOR PUMP COOLED BY A CIRCULATING FLUID".
[001] The present invention relates to a motor pump, especially a bearing-free hydraulic motor pump, fan and mechanical seal, where cooling and lubrication are effected by the fluid itself which is driven into the motor pump. In addition, the configuration of the pump allows an increase in the flow inside, increasing the efficiency of the pump.
Description of the state of the art [002] These days, there are different models of hydraulic motor pumps used to propel fluids. These motor pumps are generally composed of two chambers, the first chamber comprises a stator and an induced rotor and the second chamber comprises a hydraulic turbine that drives the fluid. However, the fluid present in the second chamber cannot come into contact with the elements of the first chamber, as this contact may cause irreparable short circuits and damage to the motor pump.
Thus, the pump chamber chambers need to be insulated from each other, but in addition to the need for isolation between the chambers, there must still be a rotational motion transmission of the rotor, so for this to be possible, A number of mechanical devices are required, such as bearings, shafts, bearing brackets, bearing housings, cooling systems, sealing gaskets, among others.
Bearing housings that are normally lubricated by oil or grease to reduce friction and wear between the pump parts have the function of supporting the rotor shaft so that when it is induced by the electromagnetic forces of the stator, it rotates with the aid of the bearings. The rotor, in turn, is connected by one end of the shaft to the hydraulic turbine that has blades or vanes, which initiate a rotary movement, propelling the fluid, when inducing the rotor.
However, as the rotor assembly and stator are in operation, the temperature of the assembly tends to rise, reaching levels that may impair the operation of the pump. Thus, in order to prevent this from happening, external cooling systems are normally used, fans (coolers), preventing the motor pump from overheating. These fans are usually connected to the end of the rotor shaft, taking advantage of its rotation to also perform the rotary movement.
In this type of motor pump, to prevent fluid entering the motor pump from contacting the stator and rotor, mechanical seals are provided which hydraulically isolate the first chamber from the second chamber of the motor pump. Also, in order to have a good operation in this type of pump, it is necessary to have a rotor centralization in relation to the stator, in order to avoid the contact between them.
However, depending on the use of the pump there is a consequent wear and tear of the above mentioned devices, causing these pumps to lose their mechanical efficiency, as well as incurring maintenance and replacement parts costs.
In view of this, patent PI0103034-5 B1 owned by Eberle Equipment and Processes S.A describes a simplified motor pump configuration. This patent describes a motor pump, where various presently described motor pump devices have been eliminated, such as rolling bearings, gaskets, shafts and the external cooling system (fans).
According to the patent PI0103034-5 B1, the motor pump has a rotor having coupled to one of its ends a turbine, forming a rotor assembly and solidary turbine. Said assembly is poured, defined a fluid passage. Thus, upon operation of said motor pump, the fluid after passing through an inlet opening enters the rotor and turbine assembly through said passageway, reaching the turbine and being driven towards an outlet opening.
However, a part of the fluid, instead of being directed to the fluid outlet, circulates in the motor pump. This fluid that remains in the motor pump creates a fluid film. Thus, by the action of centripetal forces of the rotor and turbine assembly and the hydrostatic forces of the fluid film, the assembly does not come into contact with the pump walls, remaining immersed in the fluid, promoting a floating bearing.
With this, the PI0103034-5 B1 patent motor pump features simpler manufacturing and maintenance, and is quieter than ordinary motor pumps, due to the existence of a floating bearing that allows fewer parts to be assembled. .
However, the motor pump as described above has a flow limit, as the fluid must pass through the fluid passageway defined by the rotor and turbine assembly. Thus, the diameter of the passageway defines the limit of the fluid passing through it. therefore, there is a loss of flow, as well as a loss of impulsion due to the path that the fluid must travel to the exit of the pump.
Thus, the present invention aims to present a new motor pump configuration, which eliminates the flow restriction problem of the motor pump described, maintaining the fluid circulation inside the motor pump, thus allowing the floating bearing. This new configuration presents as a result of increased flow inside the motor pump, which makes it present a higher efficiency.
Brief Description of the Invention The present invention relates to a motor pump comprising two chambers, the first fluid-insulated chamber and the second fluid-defining chamber having an inlet opening and a fluid outlet opening .
In the first chamber is located the stator, which in a preferred embodiment is located adjacent the walls separating the first chamber from the second chamber, so that the fluid circulating through the second chamber can thermally cool the stator.
In the second chamber are located a rotor and a turbine, which operate together, which are located at least in part concentrically with respect to the stator. The rotor and turbine assembly is electromagnetically induced by the stator to propel a fluid from the inlet port to the outlet port.
When operating the pump, and because the fluid inlet and outlet are located at the same end of the pump (first end), a preferably conical shaped fluid driver is located at the front end of the rotor assembly. and turbine. Thus, when fluid is driven into the motor pump, most of the fluid is directed directly to the fluid outlet, while a smaller portion is kept inside the motor pump.
The fluid portion held within the pump creates a fluid film around the rotor and turbine assembly. Thus, the centripetal forces generated by the assembly and the hydrostatic forces of said film allow the rotor and turbine assembly to rotate with a minimum of friction, promoting a floating bearing. However, the fluid remaining inside the pump circulates around the first chamber, thermally cooling the stator, eliminating the need for an external cooling system, as the heat exchange between the circulating fluid and the rotor and turbine assembly will result in the cooling of this assembly so that the temperature always remains at desirable levels.
In view of the foregoing, the motor pump of the present invention by permitting the change of fluid flow within the motor pump results in increased flow in the motor pump, eliminating flow restriction losses, causing it to exhibit greater flow. Yield. In addition, the pump in this new configuration retains a floating bearing with a simpler configuration and less costly manufacturing, eliminating the use of external cooling systems (fans) as well as bearing housings, shafts and mechanical seals.
Brief Description of the Drawings The present invention will hereinafter be described in more detail based on an exemplary embodiment shown in the drawings. The figures show: Figure 1 - a cross-sectional side view of the fluid motor pump embodied in accordance with the present invention;
Figure 2 is a cross-sectional side view of the turbine rotor assembly in which a fluid driver is shown.
Figure 3 is a rear side view of the rotor and turbine assembly, in which relief holes are shown.
Fig. 4 is a cross-sectional view similar to Fig. 1, showing the fluid path inside the pump in accordance with the teachings of the present invention;
Figure 5 is an exploded perspective view of the pump according to the present invention allowing a clearer view of the components thereof; and Figure 6 is a perspective external view of the fluid motor pump in its preferred embodiment.
DETAILED DESCRIPTION OF THE FIGURES Figure 1 illustrates a preferred embodiment of the present invention wherein there is a motor pump 10 free of components commonly found in this type of motor pumps, such as bearing housings, external cooling system, axles. and mechanical seals. The present embodiment illustrates a motor pump 10 comprising a housing 14, preferably made of injected polymeric material or any other material suitable for operating conditions of the motor pump 10, which comprises a first fluid-isolated chamber 19 and a second chamber 17, which defines the fluid path inside the motor pump 10. Also, said motor pump 10 further comprises a fluid inlet 15 and a fluid outlet 16, which are located at a first end A of motor pump 10.
In the second chamber 17, there is located a solidarity rotor and turbine assembly 11, which enable the fluid passing through said chamber 17 to be rotated. This assembly 11 is cast, creating a fluid channel 18, and furthermore is made of polymeric material. Furthermore, at the front end 24 (Figure 2) of the assembly 11 is located a ring 21 for centrifuging fluid and within this ring 21, there is also located a preferably conical fluid driver 20. In housing 14 (Figure 1), the first chamber 19 is still located, which is isolated from the fluids circulating in the second chamber 17. In the first chamber 19, a stator 12 is located, which induces, by means of a field magnetic, the drive the rotational movement of the rotor and turbine assembly 11.
In addition, the second chamber 17 of the pump 10 further comprises a plurality of fluid passages 17.1 to allow fluid to flow therethrough. Said fluid passages 17.1 further allow fluid to circulate around the first chamber 19, cooling the stator 12 by thermal conduction.
As can be seen from Figure 2 and as previously mentioned, the rotor and turbine assembly 11 is comprised of a ring 21 and a fluid driver 20. Thus, when in operation, the fluid, after passing through the opening 15 of chamber 17 (FIG. 1) contacts fluid director 20 (FIG. 2), which restricts fluid entry into the fluid channel 18 of the rotor and turbine assembly 11, so that most of the fluid directs directly to the fluid outlet 16 (figure 1) due to the rotational forces of the rotor and turbine assembly 11 which drives the fluid with a radial force towards the fluid outlet 16. The smallest part of the fluid remains circulating in the fluid. inside chamber 17 at fluid passages 17.1.
Remaining fluid in motor pump 10 (circulating fluid other than that directed to outlet 16), after circulating the entire length of second chamber 17, through passages 17.1 in the opposite direction to inlet 15, enters the rotor and turbine assembly 11. (as indicated by the arrows S) passing through a fluid channel 18, the inlet of which is located at a second end B of the motor pump. Channel 18 fluid is directed toward at least one outlet 22 at the front end 24 of the rotor and turbine assembly 11, reaching ring 21, which is in a pivoting motion, being driven toward the fluid outlet 16
Moreover, when the remaining fluid is circulating in the second chamber 17, through the passages 17.1, it creates a constant fluid film 13 between the walls of the second chamber 17 and the rotor and turbine assembly 11. Thus, the centripetal forces of the The rotor and turbine assembly, with the hydrostatic forces of the film 13, allow the assembly 11 to rotate freely without contacting the walls of the second chamber 17, providing a floating bearing. Thus, in addition to the film 13 supporting the assembly 11, it also functions as a lubricating fluid, which virtually eliminates friction between the assembly 11 and the walls of the second chamber 17.
However, although the rotor and 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 which mainly maintains set 11 in an equilibrium position about its axis through the electromagnetic force E generated. However, the electromagnetic force E alone is not sufficient to keep the set 11 in equilibrium position, as fluid entry into the pump 10 causes a suction force D, contrary to the electromagnetic force E, which tends to displace the 11 so that the axial equilibrium of the assembly 11 is maintained, the ring 21 has at its rear at least one relief hole 23 as shown in FIG. In a preferred embodiment five radially equidistant relief holes 23 are used. Through each of these relief holes 23 a fluid flow is created, causing a relief force F (axial thrust), contrary to suction force D, which assists the electromagnetic force E emitted by stator 12 to maintain equilibrium. the rotor and turbine assembly 11.
In view of the above, it is found that the second chamber 17 has passages 17.1, allowing fluid to circulate within the motor pump 10, eliminating the need for the use of lubricating fluids and external cooling systems. In addition, because the motor pump is composed almost entirely of injectable polymeric material, there is a reduction in components compared to the commonly known motor pumps, making their assembly simpler and more economical.
Thus, the motor pump of the present invention, due to the described configuration, exhibits minimal energy losses, primarily due to the circulating fluid inside the motor pump 10, which creates a fluid film between the rotor and turbine assembly 11 and the second chamber. 17, and which through the hydrostatic forces and the centripetal forces of the assembly 11, allow the assembly 11 to be floating (floating bearing), reducing the friction of said assembly 11 with the walls of the second chamber 17.
Furthermore, with fluid inlet 15 and fluid outlet 16 located at the same end A of motor pump 10, it allows most of the fluid that enters it to be driven to outlet 16 in substantially the same manner. the moment it enters, there is no loss of fluid drive force. However, there is also no loss of fluid flow due to diameter restriction, as the area available for fluid passage is substantially constant, allowing for increased flow inside the pump, and consequently causing the pump to be show a higher yield. It is emphasized that in the prior art there is a need for the main stream to pass through the entire length of the fluid rod 18, which has a reduced area section (there are substantial pressure losses) compared to the area through which the main stream of the invention on screen flows.
Also, it is important to note that the space between the stator and the rotor, which in the state of the art is commonly known as air gap and is air filled, in this invention this space is also filled by a fluid film 13. there is the polymeric layer in the second chamber 17 and the rotor and turbine assembly 11 and there are further relief holes 23. The combination of the film 13, the polymeric wall and the relief holes 23 ensures perfect centralization of the stator 12 and the assembly 11 as well as an equilibrium position thereof about the axis such that when the assembly 11, when operating the pump 10, rotates, the contact of the assembly 11 with the walls of the second chamber 17 is avoided.
Finally, it is also important to note that motor pump 10 of the present invention is an incorrosible pump, since only the surface, made of polymeric materials and AISI 304 stainless steel, will have contact with the fluid. Furthermore, by using the circulating fluid itself for cooling, the motor pump of the present invention can be installed in unventilated or submerged locations.
Having described an exemplary preferred embodiment, it should be understood that the scope of the present invention encompasses other possible variations and is limited only by the content of the appended claims, including the possible equivalents thereof.
Reference List 10 - Pump 11 - Rotor and Turbine Assembly 12 - Stator 13 - Fluid Film 14 - Frame 15 - Fluid Inlet 16 - Fluid Outlet 17 - Second Chamber 17.1 - Fluid Passage 18 - Fluid Channel 19 - First chamber 20 - fluid driver 21 - ring 22 - outlet holes 23 - relief holes 24 - front end A - first end B - second end S - fluid path

Claims (14)

1. Circulating fluid-cooled floating pump (10) comprising a housing (14) formed by: a first fluid-isolated chamber (19) comprising a stator (12); a second chamber (17) which is fluidly communicating with a fluid inlet (15) and a fluid outlet (16) and comprising fluid passages (17.1) and a rotor having a turbine coupled to its front end forming a solidarity rotor and turbine assembly (11); wherein the rotor and turbine assembly (11) is cast, forming a fluid channel (18); and wherein the fluid outlet (16) is orthogonal to a front end (24) of the rotor and turbine assembly (11); characterized in that the fluid inlet (15) and the fluid outlet (16) are located at a first end (A) of the motor pump (10); and the rotor and turbine assembly (11) comprises, fixed to its front end (24), a fluid driver (20) with at least one outlet port (22).
Circulating fluid-cooled floating pump motor (10) according to Claim 1, characterized in that the fluid director (20) has a conical shape.
Circulating fluid-cooled floating pump motor (10) according to any one of the preceding claims, characterized in that the fluid director (20) restricts the fluid inlet from the fluid inlet (15) in the fluid channel (18) of the rotor and turbine assembly (11).
Circulating fluid-cooled floating pump motor (10) according to any one of the preceding claims, characterized in that the inlet of the fluid channel (18) is located at a second end (B) of the motor pump (10). ).
Circulating fluid-cooled floating pump motor (10) according to any one of the preceding claims, characterized in that the fluid passages (17.1) form a constant fluid film (13).
Circulating fluid-cooled floating-pump motor (10) according to any one of the preceding claims, characterized in that the fluid passages (17.1) further permit fluid to circulate around the first isolated chamber (19). fluid by cooling the stator (12).
Circulating fluid-cooled floating pump motor (10) according to any one of the preceding claims, characterized in that the rotor and turbine assembly is comprised of a ring (21) for centrifuging fluid.
Circulating fluid-cooled floating pump motor (10) according to Claim 7, characterized in that the rear portion of the ring (21) comprises at least one relief hole (23).
Circulating fluid-cooled floating pump motor (10) according to Claim 8, the rear portion of the ring (21) comprises five relief holes (23).
Circulating fluid-cooled floating pump (10) according to any one of the preceding claims, characterized in that the area available for the passage of fluid to be transported is substantially constant.
Circulating fluid-cooled floating-pump motor (10) according to Claim 9, characterized in that the loss of fluid transport pressure is minimal by the absence of restriction in the area through which fluid flow circulates.
Circulating fluid-cooled floating pump (10) according to any one of the preceding claims, characterized in that the space between said rotor-turbine assembly (11) and the stator (12) is filled by the walls. of the first (19) and second (17) chambers.
13
Circulating fluid-cooled floating pump motor (10) according to any one of the preceding claims, characterized in that the housing (14) is made of injected polymer material.
BR102014021617A 2014-09-01 2014-09-01 floating bearing motor pump cooled by a circulating fluid BR102014021617A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR102014021617A BR102014021617A2 (en) 2014-09-01 2014-09-01 floating bearing motor pump cooled by a circulating fluid

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BR102014021617A BR102014021617A2 (en) 2014-09-01 2014-09-01 floating bearing motor pump cooled by a circulating fluid
PCT/BR2015/050133 WO2016033667A1 (en) 2014-09-01 2015-08-31 A floating-bearing motor pump cooled by a circulating fluid
US15/507,148 US20170268523A1 (en) 2014-09-01 2015-08-31 Floating-bearing motor pump cooled by a circulating fluid
CA2959206A CA2959206A1 (en) 2014-09-01 2015-08-31 A floating-bearing motor pump cooled by a circulating fluid

Publications (1)

Publication Number Publication Date
BR102014021617A2 true BR102014021617A2 (en) 2016-04-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
BR102014021617A BR102014021617A2 (en) 2014-09-01 2014-09-01 floating bearing motor pump cooled by a circulating fluid

Country Status (4)

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US (1) US20170268523A1 (en)
BR (1) BR102014021617A2 (en)
CA (1) CA2959206A1 (en)
WO (1) WO2016033667A1 (en)

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US20170268523A1 (en) 2017-09-21
CA2959206A1 (en) 2016-03-10
WO2016033667A1 (en) 2016-03-10

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