GB2567934A - Pump Assembly With User-Accessible Wet Region - Google Patents

Pump Assembly With User-Accessible Wet Region Download PDF

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Publication number
GB2567934A
GB2567934A GB1814044.2A GB201814044A GB2567934A GB 2567934 A GB2567934 A GB 2567934A GB 201814044 A GB201814044 A GB 201814044A GB 2567934 A GB2567934 A GB 2567934A
Authority
GB
United Kingdom
Prior art keywords
pump assembly
centrifugal pump
box
plug
lid
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.)
Granted
Application number
GB1814044.2A
Other versions
GB201814044D0 (en
GB2567934B (en
Inventor
Sinico Francesco
Cappocchin Michele
Cailotto Pietro
Calore Luca
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.)
DAB Pumps SpA
Original Assignee
DAB Pumps SpA
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 DAB Pumps SpA filed Critical DAB Pumps SpA
Publication of GB201814044D0 publication Critical patent/GB201814044D0/en
Publication of GB2567934A publication Critical patent/GB2567934A/en
Application granted granted Critical
Publication of GB2567934B publication Critical patent/GB2567934B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal 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
    • F04D13/0626—Details of the can
    • 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
    • F04D13/0686—Mechanical details of the pump control unit
    • 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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Landscapes

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

Abstract

A centrifugal pump assembly 10, with electric motor 19, arranged in a stator housing 11, wherein a box 13, containing an electrical board 14 and closed at the free end by a lid 15, is arranged at an axial end of the stator housing 11, the pump assembly 10 comprising a wet region, further comprising a plug 35 which has, at one end, a contour 43 adapted to enter a hole connected to the wet region, acting as a flow control element, and, at the other end, a head 40 adapted to be easily accessible to the user, the plug 35 having such a length that the outer surface of the head 40 is at a level that is proximate to the level of the lid 15 of the box 13 in a closed configuration.

Description

PUMP ASSEMBLY WITH USER-ACCESSIBLE WET REGION
The present invention relates to a centrifugal pump assembly with electric motor.
Centrifugal pump assemblies are currently known which are substantially composed of a hollow body provided with intake and delivery ducts and containing one or more impellers interleaved by diffusers and keyed on the shaft of an electric motor enclosed within a motor casing that isolates it from the pumping liquid.
An electrical board, contained in a box, powers and controls the operation of the motor.
These known methods have drawbacks and aspects that can be improved.
Normally, the release of the impeller shaft, after long periods of inactivity, is performed automatically by an electronically controlled system, but this may not always be sufficiently effective.
Furthermore, the plug, where present, has a size and shape that make it difficult to access for the user.
Moreover, the plug, where present, has such a volume that it can generate a thermal bridge from the wet region and the surrounding region, causing damage.
The aim of the present invention is to provide a centrifugal pump assembly with electric motor that is capable of improving the background art in one or more of the aspects indicated above.
Within this aim, an object of the invention is to provide a centrifugal pump assembly with electric motor and electronics, which comprises a plug for manual release of the shaft by the user that has a more compact volume with respect to similar commercially available pumps.
Another object of the invention is to provide a centrifugal pump assembly with electric motor in which said plug has such a shape and size that it can be easily accessed by the user.
A further object of the invention is to provide a centrifugal pump assembly, with electric motor, in which said plug has such a shape and size as to not generate thermal bridges.
Furthermore, an object of the present invention is to overcome the drawbacks of the background art in a manner which is alternative to any existing solutions.
Another object of the invention is to provide a centrifugal pump assembly with electric motor that is highly reliable, relatively easy to provide and at competitive costs.
This aim, as well as these and other objects which will become better apparent hereinafter, are achieved by a centrifugal pump assembly with electric motor, arranged in a stator housing, in which a box, which contains an electrical board and is closed at the free end by a lid, is arranged at an axial end of said stator housing, said pump assembly comprising a wet region, characterized in that it comprises a plug which has, at one end, a contour adapted to enter a hole connected to said wet region, acting as a flow control element, and, at the other end, a head adapted to be easily accessible to the user, said plug having such a length that the outer surface of said head is at a level that is proximate to the level of the lid of said box in the closed configuration.
Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment of the centrifugal pump assembly with electric motor according to the invention, illustrated by way of non limiting example in the accompanying drawings, wherein:
Figure 1 is a sectional view of the pump assembly according to the invention;
Figure 2 is a perspective view of a plug for the pump assembly according to the invention.
With reference to the figures, the centrifugal pump assembly, with electric motor according to the invention, is designated generally by the reference numeral 10.
The centrifugal pump assembly 10 comprises a wet region which has intake and delivery ducts, not shown in the figures, of a known type, and an impeller which is also not shown in the figures, of a known type, which is immersed in the wet region.
The impeller is keyed on a shaft 17 of an electric motor 19 which is composed of a stator 12 and a rotor 18. The electric motor is arranged in a stator housing 11, which is adapted to isolate it from the wet region.
The centrifugal pump assembly 10 comprises, at one end, an electrical box 13, which contains an electrical board 14 adapted to control and power the electric motor 19. The electrical box 13 has a cylindrical shape and is closed at the free end by a lid 15. Advantageously, the electrical board 13 may also have a different extension.
In particular, the electric motor 19 and the electrical box 14 are extended along the same axis X, which coincides with the rotation axis of the motor and of the impeller. The electric motor 19 and the electrical box 14 are connected and rendered integral by the presence of an intermediate element 16. The intermediate element 16 is a connecting and/or covering element and has a tubular shape.
The electrical box 13 and the stator housing 11 have mutually complementary contact surfaces. One or more first pins 28 extend from the electrical box 13 and are adapted to be inserted in corresponding through holes 29 provided on the contact surface of the stator housing 11. The pins 28 are adapted to connect the box 13 and the stator housing 11 and to facilitate the assembly of the pump 10.
Likewise, the box 13 is provided with one or more second pins 30, which are extended inside the box 13 and in the direction of the lid 15 and the tips of which are adapted for insertion in corresponding holes provided on the surface of the lid 15 that is directed toward the inside of the box 13. The pins are adapted to connect the box 13 and the lid 15 and to facilitate the assembly of the pump 10.
The electrical box 13 is provided internally with a tubular body 34 with an axis of extension that coincides with the axis X. The tubular body 34 is extended from the surface of contact with the stator housing 11 to the lid 15 of the electrical box 13. At the section of the tubular body 34, both the electrical board 14 and the lid 15 are provided with a through hole 36 with an axis of extension that coincides with the axis X.
Advantageously, the axis of extension of the hole may not coincide with the axis X but may be parallel thereto.
The through hole 36 and the tubular body 34 are adapted for the insertion of a plug 35 with one end in contact with the wet region. The tubular body 34 and the hole 36 of the lid 15 have such dimensions and shapes as to ensure interference and isolation of the electrical board 14 from the wet region even if the plug 35 is opened.
In particular, the plug 35 has, at one end, a contour 43 that is adapted to enter a hole which is connected to the wet region, acting as a flow control element, and, at the other end, a head 40 which is adapted to be easily accessible to the user. The plug 35 has a cylindrical shape and such a length that the external surface of the head 40 is at a level that is proximate to the level of the lid 15 of the box 13 in the closed configuration. The contour 43 comprises a disk-like end element 47 which continues in the hole, connected to the wet region, with a threaded element 42 adapted to define the fastening of the plug 35 in the threaded hole in a complementary maimer. The disk-like element 47 has dimensions which are equal to or in case comparable with those of the head 40.
The head 40 is disc-shaped and has a notch 44 adapted for the insertion of the tip of a screwdriver in order to allow the unscrewing and screwing operation.
In one constructive variation, the plug 35 comprises a plug covering element, not visible in the figures, in order to conceal its presence and generate a more pleasant visual impact.
The plug 35 has an intermediate section 41 which is also disk-like and with dimensions which are similar to those of the head 40 in order to facilitate the insertion of the plug in the hole 36 and in the tubular body 34.
A first tubular section 45 with a diameter that is smaller than the diameter of the head 40 is interposed between the head 40 and the intermediate section 41. A second tubular section 46 with a diameter that is smaller than the diameter of the first tubular section 45 is interposed between the intermediate section 41 and the end element 47.
The presence of these cylindrical sections having a reduced diameter allows to avoid thermal bridges and allows to obtain a plug which is lighter for equal costs.
The plug 35 is made of brass by turning and all of its parts, which are designated in Figure 2 by the reference numerals 40 to 47, are obtained from a single body.
Advantageously, the plug 35 can be made of stainless steel.
The seal between the wet region and the plug 35 is insured by an Ciring 37 of a known type; the seal between the wet region, the electrical box 13 and the stator housing 11 is ensured by a gasket 38 of a known type.
Male connecting plates 24 extend from the electrical board 14 and are adapted to enter female terminals 25 connected to the electric motor 19. In this manner, the board 14 can power and control the electric motor 19.
The electrical board 14 has, at one end, a connector 26 which is adapted to be inserted in an electric power supply terminal that is external to the pump. At the insertion region of the terminal, the box 13 has a tab 27 which protrudes with respect to the intermediate element 16.
It should be noted that the presence of the plug according to the invention allows release of the impeller, through the shaft, on the part of the user in a manual manner.
Furthermore, it should be noted that the dimensions and the shape of the plug allow easier access to the plug by the user.
It should also be noted that the presence in the plug of the cylindrical sections interposed between the head, central and end disk-like elements, with a reduced diameter with respect to them, allows to avoid the triggering of thermal bridges and defines a plug which has a lower weight for equal costs.
In practice it has been found that the invention achieves the intended aim and objects, providing a centrifugal pump assembly with electric motor, arranged in a stator housing, in which a box, which contains an electrical board and is closed at the free end by a lid, is arranged as an axial end of the stator housing, the pump assembly comprising a wet region, characterized in that it comprises a plug, which has, at one end, a contour adapted to enter the hole connected to the wet region, acting as a flow control element, and, at the other end, a head adapted to be easily accessible to the user, the plug having such a length that the outer surface of the head is at a level that is proximate to the level of the lid of the box in the closed configuration.
The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may furthermore be replaced with other technically equivalent elements.
In practice, the materials used, as long as they are compatible with the specific use, as well as the contingent shapes and dimensions, may be any according to requirements and to the state of the art.

Claims (15)

1. A centrifugal pump assembly (10), with electric motor (19), arranged in a stator housing (11), wherein a box (13), containing an electrical board (14) and closed at the free end by a lid (15), is arranged at an axial end of said stator housing (11), said pump assembly (10) comprising a wet region, characterized in that it comprises a plug (35) which has, at one end, a contour (43) adapted to enter a hole connected to said wet region, acting as a flow control element, and, at the other end, a head (40) adapted to be easily accessible to the user, said plug (35) having such a length that the outer surface of said head (40) is at a level that is proximate to the level of the lid (15) of said box (13) in the closed configuration.
2. The centrifugal pump assembly (10) according to claim 1, characterized in that said plug (35) has an intermediate section (41) whose dimensions are similar to those of said head (40).
3. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said plug (35) has a plug covering element adapted to hide its presence.
4. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said contour (43) comprises a disk-like end element (47) which continues in the hole, connected to said wet region, with a threaded element (42).
5. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said head (40) is disk-shaped and has a notch (44) adapted for the insertion of the tip of a screwdriver.
6. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that a first tubular section (45) having a smaller diameter than said head (40) is interposed between said head (40) and said intermediate section (41) and in that a second tubular section (46) having a smaller diameter than said first tubular section (45) is interposed between said intermediate section (41) and said disk-like end element (47).
7. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said electrical box (13) is provided internally with a tubular body (34) with an axis of extension that coincides with, or is parallel to, the axis of extension of said box (13).
8. The centrifugal pump assembly (10) according to claim 7, characterized in that said tubular body (34) has an extension from the surface of contact with said stator housing (11) to said lid (15) of said box (13).
9. The centrifugal pump assembly (10) according to claim 8, characterized in that at the section of said tubular body (34) both said electrical board (14) and said lid (15) have a through hole (36) with an axis of extension that coincides with the one of said tubular body (34).
10. The centrifugal pump assembly (10) according to claim 9, characterized in that said through hole (36) and said tubular body (34) are adapted for the insertion of said plug (35).
11. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said electrical box (13) and said stator housing (11) have mutually complementary contact surfaces.
12. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said box (13) has one or more first pins (28) adapted to be inserted in corresponding through holes (29) which are present on the contact surface of the stator housing (11).
13. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said box (13) has one or more second pins (30), which are extended inside the box (13) and in the direction of the lid (15), the tips of which are adapted for insertion in corresponding holes which are present on the surface of the lid (15) that is directed toward the inside of the box (13).
14. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said electrical board (14) is provided with male connecting plates (24) adapted to be inserted in female terminals (35) connected to said electric motor (19).
15. The centrifugal pump assembly (10) according to one or more of the preceding claims, characterized in that said electrical board (14) has, at one end, a connector (26) which is adapted to be inserted in an electric power 5 supply terminal which is external to the pump.
GB1814044.2A 2017-09-18 2018-08-29 Pump Assembly With User-Accessible Wet Region Active GB2567934B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000103805A IT201700103805A1 (en) 2017-09-18 2017-09-18 ASSEMBLED OF PUMP WITH MOISTURE AREA ACCESSIBLE TO THE USER

Publications (3)

Publication Number Publication Date
GB201814044D0 GB201814044D0 (en) 2018-10-10
GB2567934A true GB2567934A (en) 2019-05-01
GB2567934B GB2567934B (en) 2020-02-19

Family

ID=60991456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1814044.2A Active GB2567934B (en) 2017-09-18 2018-08-29 Pump Assembly With User-Accessible Wet Region

Country Status (8)

Country Link
US (1) US20190085849A1 (en)
CN (1) CN109519391B (en)
DE (1) DE102018121253A1 (en)
FR (1) FR3071279B1 (en)
GB (1) GB2567934B (en)
IT (1) IT201700103805A1 (en)
PL (1) PL234005B1 (en)
SI (1) SI25520A (en)

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KR102600465B1 (en) * 2018-06-14 2023-11-10 엘지전자 주식회사 Brushless dc motor and drarin pump having the same
IT201900011709A1 (en) * 2019-07-15 2021-01-15 Dab Pumps Spa ASSEMBLY OF IMPROVED ELECTRIC PUMP WITH USER ACCESSIBLE WET ZONE
IT202000004897A1 (en) * 2020-03-09 2021-09-09 Dab Pumps Spa ELECTRIC PUMP WITH FACILITATED MOVEMENT AND ATTACHABLE ELEMENT FOR MOVING THE SAME ELECTRIC PUMP
CN115898892A (en) * 2022-11-10 2023-04-04 佛山市威灵洗涤电机制造有限公司 Circulating pump and air conditioner

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EP3396167A1 (en) * 2017-04-27 2018-10-31 TACO ITALIA S.r.l. Fluid circulator with display

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Publication number Priority date Publication date Assignee Title
US20040160142A1 (en) * 2003-01-10 2004-08-19 Askoll Holdings S.R.L. Permanent-magnet synchronous electric motor with isolated rotor for circulation pumps of heating and/or conditioning systems
EP3396167A1 (en) * 2017-04-27 2018-10-31 TACO ITALIA S.r.l. Fluid circulator with display

Also Published As

Publication number Publication date
CN109519391B (en) 2022-04-01
IT201700103805A1 (en) 2019-03-18
FR3071279A1 (en) 2019-03-22
FR3071279B1 (en) 2022-10-21
GB201814044D0 (en) 2018-10-10
GB2567934B (en) 2020-02-19
CN109519391A (en) 2019-03-26
DE102018121253A1 (en) 2019-03-21
PL234005B1 (en) 2019-12-31
US20190085849A1 (en) 2019-03-21
PL426982A1 (en) 2019-03-25
SI25520A (en) 2019-03-29

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