US20200191164A1 - Motor rotor for water pump, water pump, and pool circulation system - Google Patents
Motor rotor for water pump, water pump, and pool circulation system Download PDFInfo
- Publication number
- US20200191164A1 US20200191164A1 US16/708,437 US201916708437A US2020191164A1 US 20200191164 A1 US20200191164 A1 US 20200191164A1 US 201916708437 A US201916708437 A US 201916708437A US 2020191164 A1 US2020191164 A1 US 2020191164A1
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- US
- United States
- Prior art keywords
- water pump
- motor rotor
- molded part
- chamber
- rotatable shaft
- 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.)
- Abandoned
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Classifications
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- 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
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
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- 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
- F04D13/064—Details of the magnetic circuit
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H4/00—Swimming or splash baths or pools
- E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H4/00—Swimming or splash baths or pools
- E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
- E04H4/129—Systems for heating the water content of swimming pools
-
- 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
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- 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
- F04D29/4293—Details of fluid inlet or outlet
Definitions
- the present disclosure relates to the technical field of water pumps. More specifically, the present disclosure relates to a motor rotor for a water pump. The present disclosure further relates to a water pump comprising a motor rotor and a pool circulation system comprising the water pump.
- a motor rotor for a water pump comprises a hollow rotatable shaft having a first injection-molded part.
- the motor rotor also includes a magnet having an axial length and being disposed circumferentially around a portion of the first injection-molded part. The portion of the first injection-molded part extends through the entire axial length of the magnet.
- the motor rotor also includes an impeller integrally formed with the first injection-molded part, the impeller being located at an axial end of the hollow rotatable shaft.
- FIG. 1 is a cross-sectional view of a pool circulation system, according to embodiments of the present disclosure
- FIG. 2 is an exploded view of a water pump, according to embodiments of the present disclosure
- FIG. 3 is a cross-sectional view of the water pump of FIG. 2 ;
- FIG. 4 is a perspective view of a motor rotor of the water pump of FIG. 2 , according to embodiments of the present disclosure
- FIG. 5 is a cross-sectional perspective view of the motor rotor of FIG. 4 ;
- FIG. 6 is a cross-sectional view of the motor rotor of FIG. 4 ;
- FIG. 8 is a cross-sectional perspective view of the motor rotor of FIG. 7 ;
- FIG. 9 is a cross-sectional view of the motor rotor of FIG. 7 ;
- FIG. 10 is a perspective view of a motor rotor of the water pump of FIG. 2 , according to embodiments of the present disclosure
- FIG. 11 is a cross-sectional perspective view of the motor rotor of FIG. 10 ;
- FIG. 12 is a cross-sectional view of the motor rotor of FIG. 10 ;
- FIG. 13 is a perspective view of a motor rotor of the water pump of FIG. 2 , according to embodiments of the present disclosure
- FIG. 14 is a cross-sectional perspective view of the motor rotor of FIG. 13 ;
- FIG. 15 is a cross-sectional view of the motor rotor of FIG. 13 .
- FIG. 1 is a cross-sectional diagram of a pool circulation system, according to some embodiments of the present disclosure.
- the pool circulation system may be used to control the temperature of the pool by circulating water through a heater.
- the pool circulation system comprises a water pump 1 , a heater 2 , a water inlet pipeline 3 and a water outlet pipeline 4 .
- the pool circulation system may comprise other components, such as a filter for removing impurities from the water.
- a filter may be arranged, for example, in the water pump 1 or between the water pump 1 and the heater 2 .
- the water inlet pipeline 3 comprises a water inlet end 31 and a water outlet end 32 .
- the water inlet end 31 is in communication with a water injection region of the pool and is provided with a one-way valve so that water can only flow from the water injection region of the pool to the water inlet pipeline 3 .
- the water outlet end 32 is in communication with a water inlet 111 of the water pump 1 .
- the water pump 1 pumps water to be heated from the water injection region of the pool via the water inlet pipeline 3 and conveys the pumped water to the heater 2 .
- a water inlet 21 of the heater 2 is in communication with a water outlet 112 of the water pump 1 .
- the water entering the heater 2 from the water inlet 21 is heated by a heating component 23 of the heater 2 and is then conveyed to the water injection region of the pool via the water outlet pipeline 4 .
- the water outlet pipeline 4 comprises a water inlet end 41 and a water outlet end 42 .
- the water inlet end 41 is in communication with the water outlet 22 of the heater 2
- the water outlet end 42 is in communication with the water injection region of the pool and is provided with a one-way valve, so that water can only flow from the water outlet pipeline 4 to the water injection region of the pool.
- the pool circulation system may further comprise a water flow switch provided on the water inlet pipeline 3 and/or on the water outlet pipeline 4 .
- FIG. 1 shows a water flow switch 43 provided on the water outlet pipeline 4 .
- the water flow switch 43 may trigger an alarm signal when no water is in the pool circulation system to avoid or reduce damaging the heater 2 , without water or no-load operation of the filter.
- the pool circulation system further comprises a temperature sensing probe 24 provided downstream of the heating component 23 of the heater 2 to sense the temperature of the heated water.
- the pool circulation system further comprises a temperature controller 25 provided in the heater 2 .
- the temperature controller 25 is, for example, a manually reset temperature controller, or the temperature controller 25 can be advantageously electrically connected to the temperature sensing probe 24 to control the heating temperature of the heater 2 based on the sensing result of the temperature sensing probe 24 .
- FIG. 2 is an exploded view of the water pump 1 of the pool circulation system of FIG. 1 .
- FIG. 3 is a cross-sectional view of the water pump 1 of FIG. 2 .
- the water pump 1 comprises a pump cover 11 , a housing 12 , as well as a motor rotor 13 and a motor stator mounted in the housing 12 .
- the housing 12 comprises a first chamber 121 provided with an opening 126 in a mounting end face 124 of the housing 12 , and a second chamber 122 isolated from the first chamber 121 in a sealed manner by a pump wall 123 .
- a fixing rod 14 is mounted in the first chamber 121 .
- a first end 141 of the fixing rod 14 is fixed to the bottom of the first chamber 121 , and a second end 142 protrudes from the opening 126 and is fixed to the pump cover 11 .
- the fixing rod 14 may be, for example, a porcelain shaft.
- the pump cover 11 comprises a body 113 and a mounting flange 114 extending around an edge of the body 113 .
- the mounting flange 114 is adapted in shape to an outer edge of the mounting end face 124 of the housing 12 , so that the mounting flange 114 can be connected to the mounting end face 124 by connecting components (e.g., screws), so that the pump cover 11 and the housing 12 are fixed to each other and confine a drainage chamber 115 through which the fixing rod 14 passes.
- the body 113 of the pump cover 11 is provided with a water inlet 111 in communication with the water inlet pipeline 3 and a water outlet 112 in communication with the heater 2 .
- the motor rotor 13 comprises a hollow rotatable shaft 131 and an impeller 132 integrally formed with the hollow rotatable shaft 131 .
- the hollow rotatable shaft 131 is mounted in the first cavity 121 of the housing 12 by being sheathed on the fixing rod 14 , and axially extends from the first chamber 121 to the drainage chamber 115 via the opening 126 .
- the impeller 132 is integrally formed at one axial end, located in the drainage chamber 115 , of the hollow rotatable shaft 131 so as to drive water to flow in the drainage chamber 115 .
- the integrated motor rotor 13 of the present disclosure effectively reduces the operation noise and prolongs the service life of the water pump.
- the motor stator is provided in the second chamber 122 , and a magnetic field generated by the motor stator passes through the pump wall 123 between the first chamber 121 and the second chamber 122 to drive the motor rotor 13 by interacting with a magnet (for example, magnetic steel) within the hollow rotatable shaft 131 of the motor rotor 13 .
- a magnet for example, magnetic steel
- the second chamber 122 should be isolated, in a sealed manner, from the first chamber 121 and the drainage chamber 115 to prevent water from entering the second chamber 122 and damaging the motor stator.
- the motor stator comprises a winding bobbin 151 provided in the second chamber 122 , a silicon steel sheet 152 provided on the winding bobbin 151 , and an insulating sheet 153 provided on the silicon steel sheet 152 .
- the mounting end face 124 of the housing 12 defines an annular groove 125 which faces the mounting flange 114 of the pump cover 11 .
- the water pump 1 further comprises a seal ring 18 which is provided in the annular groove 125 and is attached to the mounting flange 114 to prevent water in the drainage chamber 115 from flowing between the mounting flange 114 and the mounting end face 124 .
- At least one reinforcing rib 116 may be provided between the body 113 of the pump cover 11 and the mounting flange 114 to increase the strength of the pump cover 11 .
- the motor rotor 13 of the water pump 1 Four different embodiments of the motor rotor 13 of the water pump 1 , according to the present disclosure, are described in conjunction with FIGS. 4 to 15 .
- the motor rotor 13 may be manufactured using secondary injection molding due to the presence of the magnet 134 .
- FIG. 4 is a perspective view of a first embodiment of the motor rotor 13 of the water pump, according to the present disclosure.
- FIG. 5 is a cross-sectional perspective view of the motor rotor 13 of FIG. 4
- FIG. 6 is a cross-sectional view of the motor rotor 13 of FIG. 4 .
- the hollow rotatable shaft 131 of the motor rotor 13 comprises a first injection molded part 1311 and a second injection molded part 1312 .
- the first injection molded part 1311 has a cylindrical structure that extends circumferentially around and axially along the fixing rod 14 from the first chamber 121 of the housing 12 to the drainage chamber 115 and is integrally formed with the impeller 132 .
- the second injection molded part 1312 extends circumferentially around the first injection molded part 1311 and over a part of an axial length of the first injection molded part 1311 .
- the second injection molded part 1312 cooperates with the first injection molded part 1311 so that the magnet 134 is fixedly clamped between the first injection molded part 1311 and the second injection molded part 1312 .
- the first injection molded part 1311 is configured to extend around the fixing rod 14 , substantially over the entire axial length of the hollow rotatable shaft 131 .
- the impeller 132 extends radially outwardly from an axial end of the hollow rotatable shaft 131 .
- the first injection molded part 1311 further comprises a first protrusion 13111 , a second protrusion 13112 , and a third protrusion 13113 , which protrude from an outer wall of the first injection molded part 1311 , the first protrusion 13111 being located at the bottom of the first injection molded part 1311 , and the second protrusion 13112 and the third protrusion 13113 being located at a substantially axial central position of the first injection molded part 1311 .
- the magnet 134 is disposed circumferentially around a portion of the first injection molded part 1311 between the first protrusion 13111 and the second protrusion 13112 , with a portion of the first injection molded part 1311 extending through an entire axial length of the magnet 134 .
- the second injection molded part 1312 extends axially from the bottom of the motor rotor 13 to the third protrusion 13113 of the first injection molded part 1311 to cover the magnet 134 .
- the second injection molded part 1312 further comprises a first fixing portion 13121 and a second fixing portion 13122 , which protrude from an inner wall of the second injection molded part 1312 , the first fixing portion 13121 forming the bottom of the motor rotor 13 to support the magnet 134 and the first injection molded part 1311 , and the second fixing portion 13122 being clamped between the second protrusion 13112 and the third protrusion 13113 of the first injection molded part 1311 , so that the second injection molded part 1312 cooperates with the first injection molded part 1311 , so that the magnet 134 is fixedly clamped between the first injection molded part 1311 and the second injection molded part 1312 .
- the motor rotor 13 further comprises two shaft sleeves (for example, porcelain sleeves) which are nested between the fixing rod 14 and the hollow rotatable shaft 131 at two axial ends of the hollow rotatable shaft 131 . More specifically, the motor rotor 13 comprises a first shaft sleeve 1331 , which is nested between the fixing rod 14 and the first protrusion 13111 of the first injection molded part 1311 and between the fixing rod 14 and the first fixing portion 13121 of the second injection molded part 1312 at the bottom of the hollow rotatable shaft 131 , and a second shaft sleeve 1332 which is nested between the fixing rod 14 and the top of the first injection molded part 1311 at the top of the hollow rotatable shaft 131 .
- two shaft sleeves for example, porcelain sleeves
- FIG. 7 is a perspective view of a second embodiment of the motor rotor 13 of the water pump, according to the present disclosure.
- FIG. 8 is a cross-sectional perspective view of the motor rotor 13 of FIG. 7
- FIG. 9 is a cross-sectional view of the motor rotor 13 of FIG. 7 .
- the structures of the hollow rotatable shaft 131 and the impeller 132 of the motor rotor 13 are similar to those in the first embodiment, which will not be described here again.
- the motor rotor 13 comprises a shaft sleeve 1333 which is nested between the fixing rod 14 and the hollow rotatable shaft 131 substantially along the entire axial length of the hollow rotatable shaft 131 . That is, the shaft sleeve 1333 axially extends, around the fixing rod 14 , substantially from the first fixing portion 13121 of the second injection molded part 1312 and through the impeller 132 located at the top of the first injection molded part 1311 .
- FIG. 10 is a perspective view of a third embodiment of the motor rotor 13 of the water pump, according to the present disclosure.
- FIG. 11 is a cross-sectional perspective view of the motor rotor 13 of FIG. 10
- FIG. 12 is a cross-sectional view of the motor rotor 13 of FIG. 10 .
- the hollow rotatable shaft 131 of the motor rotor 13 comprises a first injection molded part 1311 and a second injection molded part 1312 .
- the first injection molded part 1311 has a cylindrical structure that extends circumferentially around and axially along the fixing rod 14 in the first chamber 121 of the housing 12 .
- the second injection molded part 1312 extends circumferentially around the first injection molded part 1311 and the fixing rod 14 , from the first chamber 121 of the housing 12 to the drainage chamber 115 and is integrally formed with the impeller 132 .
- the second injection molded part 1312 cooperates with the first injection molded part 1311 , so that the magnet 134 is fixedly clamped between the first injection molded part 1311 and the second injection molded part 1312 .
- the first injection molded part 1311 is configured to extend around the fixing rod 14 , from a position near the bottom of the motor rotor 13 .
- the first injection molded part 1311 extends axially through an entire axial length of the magnet 134 and beyond.
- the first injection molded part 1311 further comprises a first protrusion 13111 , a second protrusion 13112 and a third protrusion 13113 , which protrude from an outer wall of the first injection molded part 1311 .
- the first protrusion 13111 is located at the bottom of the first injection molded part 1311 .
- the second protrusion 13112 and the third protrusion 13113 are each located at the substantially axial central position of the hollow rotatable shaft 131 , with the magnet 134 extending circumferentially around the first injection molded part 1311 and being fixed axially between the first protrusion 13111 and the second protrusion 13112 .
- the second injection molded part 1312 extends around the first injection molded part 1311 , the magnet 134 and the fixing rod 14 over the entire axial length of the hollow rotatable shaft 131 to cover the magnet 134 and the first injection molded part 1311 so as to form the illustrated “stepped” structure.
- the impeller 132 radially extends outward from an axial end of the second injection molded part 1312 .
- the impeller 132 is thus located in the drainage chamber 115 , so as to drive water to flow in the drainage chamber 115 .
- the second injection molded part 1312 further comprises a first fixing portion 13121 and a second fixing portion 13122 , which protrude from an inner wall of the second injection molded part 1312 , the first fixing portion 13121 forming the bottom of the motor rotor 13 to support the magnet 134 and the first injection molded part 1311 , and the second fixing portion 13122 being clamped between the second protrusion 13112 and the third protrusion 13113 of the first injection molded part 1311 so that the second injection molded part 1312 cooperates with the first injection molded part 1311 , so that the magnet 134 is fixedly clamped between the first injection molded part 1311 and the second injection molded part 1312 .
- FIG. 13 is a perspective view of a fourth embodiment of the motor rotor 13 of the water pump, according to the present disclosure.
- FIG. 14 is a cross-sectional perspective view of the motor rotor 13 of FIG. 13
- FIG. 15 is a cross-sectional view of the motor rotor 13 of FIG. 13 .
- the structures of the hollow rotatable shaft 131 and the impeller 132 of the motor rotor 13 are similar to those in the third embodiment, which will not be described here again.
- the motor rotor 13 comprises a shaft sleeve 1333 which is nested between the fixing rod 14 and the hollow rotatable shaft 131 substantially along the entire axial length of the hollow rotatable shaft 131 . That is, the shaft sleeve 1333 extends around the fixing rod 14 , substantially from the first fixing portion 13121 of the second injection molded part 1312 and through the impeller 132 located at the top of the second injection molded part 1312 .
Abstract
Description
- This utility patent application claims the benefit of Chinese patent application CN 201822114202.5, filed Dec. 17, 2018 and Chinese patent application CN 201921231450.6, filed Aug. 1, 2019, the full content of both of which are herein incorporated by reference.
- The present disclosure relates to the technical field of water pumps. More specifically, the present disclosure relates to a motor rotor for a water pump. The present disclosure further relates to a water pump comprising a motor rotor and a pool circulation system comprising the water pump.
- Most swimming pools are equipped with a circulation system in communication with a water injection region of the pool for heating water in the pool. The circulation system typically comprises a water inlet pipeline, a water pump, a heater, and a water outlet pipeline. The circulation system can, therefore, maintain the temperature of water in the pool within a comfortable temperature range for the human body, and thus enables users to use the pool for a long time.
- Conventional water pumps for pool circulation systems use a separate-type impeller. That is, the impeller and the motor rotor of the water pump are two independent components. Such separate-type impellers may become loose and disassembled after long-term use, which can result in increased noise during operation of the water pump. In addition, looseness between the impeller and the motor rotor may cause damage to components of the water pump and reduce the service life of the water pump.
- In accordance with various embodiments of the present disclosure, a motor rotor for a water pump comprises a hollow rotatable shaft having a first injection-molded part. The motor rotor also includes a magnet having an axial length and being disposed circumferentially around a portion of the first injection-molded part. The portion of the first injection-molded part extends through the entire axial length of the magnet. The motor rotor also includes an impeller integrally formed with the first injection-molded part, the impeller being located at an axial end of the hollow rotatable shaft.
- To understand the present disclosure, it will now be described by way of example, with reference to the accompanying drawings in which implementations of the disclosure are illustrated and, together with the description below, serve to explain the principles of the disclosure.
-
FIG. 1 is a cross-sectional view of a pool circulation system, according to embodiments of the present disclosure; -
FIG. 2 is an exploded view of a water pump, according to embodiments of the present disclosure; -
FIG. 3 is a cross-sectional view of the water pump ofFIG. 2 ; -
FIG. 4 is a perspective view of a motor rotor of the water pump ofFIG. 2 , according to embodiments of the present disclosure; -
FIG. 5 is a cross-sectional perspective view of the motor rotor ofFIG. 4 ; -
FIG. 6 is a cross-sectional view of the motor rotor ofFIG. 4 ; -
FIG. 7 is a perspective view of a motor rotor of the water pump ofFIG. 2 , according to embodiments of the present disclosure; -
FIG. 8 is a cross-sectional perspective view of the motor rotor ofFIG. 7 ; -
FIG. 9 is a cross-sectional view of the motor rotor ofFIG. 7 ; -
FIG. 10 is a perspective view of a motor rotor of the water pump ofFIG. 2 , according to embodiments of the present disclosure; -
FIG. 11 is a cross-sectional perspective view of the motor rotor ofFIG. 10 ; -
FIG. 12 is a cross-sectional view of the motor rotor ofFIG. 10 ; -
FIG. 13 is a perspective view of a motor rotor of the water pump ofFIG. 2 , according to embodiments of the present disclosure; -
FIG. 14 is a cross-sectional perspective view of the motor rotor ofFIG. 13 ; and -
FIG. 15 is a cross-sectional view of the motor rotor ofFIG. 13 . - The present disclosure provides exemplary embodiments of a pool circulation system, and a water pump for use within such a pool circulation system. Furthermore, the present disclosure provides exemplary embodiments of a motor rotor for a water pump. The exemplary embodiments of the present disclosure are described below with reference to the drawings for illustration. It should be understood that the description about the exemplary embodiments should be considered as mere illustrations of the structures and principles of the present invention, and the present invention is not limited to the exemplary embodiments. The present invention may be incorporated in any type or form of a water pump, including, but not limited to pumping devices for pools or hot tubs, or any other desired pumping device. The water pump, and the motor rotor of the present disclosure, includes improvements over conventional water pumps having conventional motor rotors.
-
FIG. 1 is a cross-sectional diagram of a pool circulation system, according to some embodiments of the present disclosure. The pool circulation system may be used to control the temperature of the pool by circulating water through a heater. As shown inFIG. 1 , the pool circulation system comprises awater pump 1, aheater 2, awater inlet pipeline 3 and awater outlet pipeline 4. In some embodiments, the pool circulation system may comprise other components, such as a filter for removing impurities from the water. A filter may be arranged, for example, in thewater pump 1 or between thewater pump 1 and theheater 2. - The
water inlet pipeline 3 comprises awater inlet end 31 and awater outlet end 32. Thewater inlet end 31 is in communication with a water injection region of the pool and is provided with a one-way valve so that water can only flow from the water injection region of the pool to thewater inlet pipeline 3. Thewater outlet end 32 is in communication with awater inlet 111 of thewater pump 1. When a motor of thewater pump 1 is started, the water pump 1 pumps water to be heated from the water injection region of the pool via thewater inlet pipeline 3 and conveys the pumped water to theheater 2. Awater inlet 21 of theheater 2 is in communication with awater outlet 112 of thewater pump 1. The water entering theheater 2 from thewater inlet 21 is heated by aheating component 23 of theheater 2 and is then conveyed to the water injection region of the pool via thewater outlet pipeline 4. Thewater outlet pipeline 4 comprises awater inlet end 41 and awater outlet end 42. Thewater inlet end 41 is in communication with thewater outlet 22 of theheater 2, and thewater outlet end 42 is in communication with the water injection region of the pool and is provided with a one-way valve, so that water can only flow from thewater outlet pipeline 4 to the water injection region of the pool. - In some embodiments, the pool circulation system may further comprise a water flow switch provided on the
water inlet pipeline 3 and/or on thewater outlet pipeline 4. For example,FIG. 1 shows awater flow switch 43 provided on thewater outlet pipeline 4. Thewater flow switch 43 may trigger an alarm signal when no water is in the pool circulation system to avoid or reduce damaging theheater 2, without water or no-load operation of the filter. - In some embodiments, and as shown on
FIG. 1 , the pool circulation system further comprises atemperature sensing probe 24 provided downstream of theheating component 23 of theheater 2 to sense the temperature of the heated water. In some embodiments, and as also shown onFIG. 1 , the pool circulation system further comprises atemperature controller 25 provided in theheater 2. Thetemperature controller 25 is, for example, a manually reset temperature controller, or thetemperature controller 25 can be advantageously electrically connected to thetemperature sensing probe 24 to control the heating temperature of theheater 2 based on the sensing result of thetemperature sensing probe 24. - The specific structure of the
water pump 1 of the pool circulation system, according to some embodiments, will be described with reference toFIGS. 2 and 3 .FIG. 2 is an exploded view of thewater pump 1 of the pool circulation system ofFIG. 1 .FIG. 3 is a cross-sectional view of thewater pump 1 ofFIG. 2 . As shown inFIGS. 2 and 3 , thewater pump 1 comprises apump cover 11, ahousing 12, as well as amotor rotor 13 and a motor stator mounted in thehousing 12. - As shown in
FIG. 3 , thehousing 12 comprises afirst chamber 121 provided with anopening 126 in a mountingend face 124 of thehousing 12, and asecond chamber 122 isolated from thefirst chamber 121 in a sealed manner by apump wall 123. A fixingrod 14 is mounted in thefirst chamber 121. Afirst end 141 of the fixingrod 14 is fixed to the bottom of thefirst chamber 121, and asecond end 142 protrudes from theopening 126 and is fixed to thepump cover 11. The fixingrod 14 may be, for example, a porcelain shaft. - The
pump cover 11 comprises abody 113 and a mountingflange 114 extending around an edge of thebody 113. The mountingflange 114 is adapted in shape to an outer edge of the mountingend face 124 of thehousing 12, so that the mountingflange 114 can be connected to the mountingend face 124 by connecting components (e.g., screws), so that thepump cover 11 and thehousing 12 are fixed to each other and confine adrainage chamber 115 through which the fixingrod 14 passes. Thebody 113 of thepump cover 11 is provided with awater inlet 111 in communication with thewater inlet pipeline 3 and awater outlet 112 in communication with theheater 2. - The
motor rotor 13 comprises a hollowrotatable shaft 131 and animpeller 132 integrally formed with the hollowrotatable shaft 131. The hollowrotatable shaft 131 is mounted in thefirst cavity 121 of thehousing 12 by being sheathed on the fixingrod 14, and axially extends from thefirst chamber 121 to thedrainage chamber 115 via theopening 126. Theimpeller 132 is integrally formed at one axial end, located in thedrainage chamber 115, of the hollowrotatable shaft 131 so as to drive water to flow in thedrainage chamber 115. Compared with the split designs of the hollowrotatable shaft 131 and theimpeller 132 found in conventional water pumps, theintegrated motor rotor 13 of the present disclosure effectively reduces the operation noise and prolongs the service life of the water pump. - The motor stator is provided in the
second chamber 122, and a magnetic field generated by the motor stator passes through thepump wall 123 between thefirst chamber 121 and thesecond chamber 122 to drive themotor rotor 13 by interacting with a magnet (for example, magnetic steel) within the hollowrotatable shaft 131 of themotor rotor 13. It is noted that thesecond chamber 122 should be isolated, in a sealed manner, from thefirst chamber 121 and thedrainage chamber 115 to prevent water from entering thesecond chamber 122 and damaging the motor stator. In some embodiments, the motor stator comprises a windingbobbin 151 provided in thesecond chamber 122, asilicon steel sheet 152 provided on the windingbobbin 151, and an insulatingsheet 153 provided on thesilicon steel sheet 152. - When the motor stator is powered on, a magnetic field generated by the motor stator drives the
motor rotor 13 to rotate around the fixingrod 14. Water from the pool is thus drawn into thedrainage chamber 115 through thewater inlet 111 by rotation of theimpeller 132 of themotor rotor 13, and the pumped water is conveyed to theheater 2 through thewater outlet 112. - In some example embodiments, as shown in
FIG. 2 , and in order to improve sealing performance, the mountingend face 124 of thehousing 12 defines anannular groove 125 which faces the mountingflange 114 of thepump cover 11. Thewater pump 1 further comprises aseal ring 18 which is provided in theannular groove 125 and is attached to the mountingflange 114 to prevent water in thedrainage chamber 115 from flowing between the mountingflange 114 and the mountingend face 124. At least one reinforcingrib 116 may be provided between thebody 113 of thepump cover 11 and the mountingflange 114 to increase the strength of thepump cover 11. - In some example embodiments, as shown in
FIG. 3 , and in order to further improve sealing performance, thepump cover 11 defines arecess 117 configured to receive thesecond end 142 of the fixingrod 14. Thewater pump 1 comprises a sealingcap 16 which is disposed in therecess 117 and covers thesecond end 142 of the fixingrod 14. Thewater pump 1 may further comprise a similar oridentical sealing cap 16 at the bottom of thefirst chamber 121 to cover thefirst end 141 of the fixingrod 14. Thewater pump 1 may further comprise awear pad 17 which is sheathed on the fixingrod 14 and is located between the sealingcap 16 and themotor rotor 13. - Four different embodiments of the
motor rotor 13 of thewater pump 1, according to the present disclosure, are described in conjunction withFIGS. 4 to 15 . In some embodiments, themotor rotor 13 may be manufactured using secondary injection molding due to the presence of themagnet 134. -
FIG. 4 is a perspective view of a first embodiment of themotor rotor 13 of the water pump, according to the present disclosure.FIG. 5 is a cross-sectional perspective view of themotor rotor 13 ofFIG. 4 , andFIG. 6 is a cross-sectional view of themotor rotor 13 ofFIG. 4 . - In the first embodiment, the hollow
rotatable shaft 131 of themotor rotor 13 comprises a first injection moldedpart 1311 and a second injection moldedpart 1312. The first injection moldedpart 1311 has a cylindrical structure that extends circumferentially around and axially along the fixingrod 14 from thefirst chamber 121 of thehousing 12 to thedrainage chamber 115 and is integrally formed with theimpeller 132. The second injection moldedpart 1312 extends circumferentially around the first injection moldedpart 1311 and over a part of an axial length of the first injection moldedpart 1311. The second injection moldedpart 1312 cooperates with the first injection moldedpart 1311 so that themagnet 134 is fixedly clamped between the first injection moldedpart 1311 and the second injection moldedpart 1312. - More specifically, as shown in
FIGS. 4 to 6 , the first injection moldedpart 1311 is configured to extend around the fixingrod 14, substantially over the entire axial length of the hollowrotatable shaft 131. Theimpeller 132 extends radially outwardly from an axial end of the hollowrotatable shaft 131. The first injection moldedpart 1311 further comprises afirst protrusion 13111, asecond protrusion 13112, and athird protrusion 13113, which protrude from an outer wall of the first injection moldedpart 1311, thefirst protrusion 13111 being located at the bottom of the first injection moldedpart 1311, and thesecond protrusion 13112 and thethird protrusion 13113 being located at a substantially axial central position of the first injection moldedpart 1311. Themagnet 134 is disposed circumferentially around a portion of the first injection moldedpart 1311 between thefirst protrusion 13111 and thesecond protrusion 13112, with a portion of the first injection moldedpart 1311 extending through an entire axial length of themagnet 134. - The second injection molded
part 1312 extends axially from the bottom of themotor rotor 13 to thethird protrusion 13113 of the first injection moldedpart 1311 to cover themagnet 134. The second injection moldedpart 1312 further comprises afirst fixing portion 13121 and asecond fixing portion 13122, which protrude from an inner wall of the second injection moldedpart 1312, thefirst fixing portion 13121 forming the bottom of themotor rotor 13 to support themagnet 134 and the first injection moldedpart 1311, and thesecond fixing portion 13122 being clamped between thesecond protrusion 13112 and thethird protrusion 13113 of the first injection moldedpart 1311, so that the second injection moldedpart 1312 cooperates with the first injection moldedpart 1311, so that themagnet 134 is fixedly clamped between the first injection moldedpart 1311 and the second injection moldedpart 1312. - In order to increase wear resistance, the
motor rotor 13 further comprises two shaft sleeves (for example, porcelain sleeves) which are nested between the fixingrod 14 and the hollowrotatable shaft 131 at two axial ends of the hollowrotatable shaft 131. More specifically, themotor rotor 13 comprises afirst shaft sleeve 1331, which is nested between the fixingrod 14 and thefirst protrusion 13111 of the first injection moldedpart 1311 and between the fixingrod 14 and thefirst fixing portion 13121 of the second injection moldedpart 1312 at the bottom of the hollowrotatable shaft 131, and asecond shaft sleeve 1332 which is nested between the fixingrod 14 and the top of the first injection moldedpart 1311 at the top of the hollowrotatable shaft 131. -
FIG. 7 is a perspective view of a second embodiment of themotor rotor 13 of the water pump, according to the present disclosure.FIG. 8 is a cross-sectional perspective view of themotor rotor 13 ofFIG. 7 , andFIG. 9 is a cross-sectional view of themotor rotor 13 ofFIG. 7 . - In the second embodiment, the structures of the hollow
rotatable shaft 131 and theimpeller 132 of themotor rotor 13 are similar to those in the first embodiment, which will not be described here again. Different from the first embodiment, as shown inFIGS. 7 to 9 , themotor rotor 13 comprises ashaft sleeve 1333 which is nested between the fixingrod 14 and the hollowrotatable shaft 131 substantially along the entire axial length of the hollowrotatable shaft 131. That is, theshaft sleeve 1333 axially extends, around the fixingrod 14, substantially from thefirst fixing portion 13121 of the second injection moldedpart 1312 and through theimpeller 132 located at the top of the first injection moldedpart 1311. -
FIG. 10 is a perspective view of a third embodiment of themotor rotor 13 of the water pump, according to the present disclosure.FIG. 11 is a cross-sectional perspective view of themotor rotor 13 ofFIG. 10 , andFIG. 12 is a cross-sectional view of themotor rotor 13 ofFIG. 10 . - In the third embodiment, the hollow
rotatable shaft 131 of themotor rotor 13 comprises a first injection moldedpart 1311 and a second injection moldedpart 1312. The first injection moldedpart 1311 has a cylindrical structure that extends circumferentially around and axially along the fixingrod 14 in thefirst chamber 121 of thehousing 12. The second injection moldedpart 1312 extends circumferentially around the first injection moldedpart 1311 and the fixingrod 14, from thefirst chamber 121 of thehousing 12 to thedrainage chamber 115 and is integrally formed with theimpeller 132. The second injection moldedpart 1312 cooperates with the first injection moldedpart 1311, so that themagnet 134 is fixedly clamped between the first injection moldedpart 1311 and the second injection moldedpart 1312. - More specifically, as shown in
FIGS. 10 to 12 , the first injection moldedpart 1311 is configured to extend around the fixingrod 14, from a position near the bottom of themotor rotor 13. The first injection moldedpart 1311 extends axially through an entire axial length of themagnet 134 and beyond. The first injection moldedpart 1311 further comprises afirst protrusion 13111, asecond protrusion 13112 and athird protrusion 13113, which protrude from an outer wall of the first injection moldedpart 1311. Thefirst protrusion 13111 is located at the bottom of the first injection moldedpart 1311. Thesecond protrusion 13112 and thethird protrusion 13113 are each located at the substantially axial central position of the hollowrotatable shaft 131, with themagnet 134 extending circumferentially around the first injection moldedpart 1311 and being fixed axially between thefirst protrusion 13111 and thesecond protrusion 13112. - The second injection molded
part 1312 extends around the first injection moldedpart 1311, themagnet 134 and the fixingrod 14 over the entire axial length of the hollowrotatable shaft 131 to cover themagnet 134 and the first injection moldedpart 1311 so as to form the illustrated “stepped” structure. Theimpeller 132 radially extends outward from an axial end of the second injection moldedpart 1312. Theimpeller 132 is thus located in thedrainage chamber 115, so as to drive water to flow in thedrainage chamber 115. The second injection moldedpart 1312 further comprises afirst fixing portion 13121 and asecond fixing portion 13122, which protrude from an inner wall of the second injection moldedpart 1312, thefirst fixing portion 13121 forming the bottom of themotor rotor 13 to support themagnet 134 and the first injection moldedpart 1311, and thesecond fixing portion 13122 being clamped between thesecond protrusion 13112 and thethird protrusion 13113 of the first injection moldedpart 1311 so that the second injection moldedpart 1312 cooperates with the first injection moldedpart 1311, so that themagnet 134 is fixedly clamped between the first injection moldedpart 1311 and the second injection moldedpart 1312. - In order to increase the wear resistance, the
motor rotor 13 further comprises two shaft sleeves (for example, porcelain sleeves) which are nested between the fixingrod 14 and the hollowrotatable shaft 131 at two axial ends of the hollowrotatable shaft 131. More specifically, themotor rotor 13 comprises afirst shaft sleeve 1331 which is nested between the fixingrod 14 and thefirst protrusion 13111 of the first injection moldedpart 1311 and between the fixingrod 14 and thefirst fixing portion 13121 of the second injection moldedpart 1312 at the bottom of the hollowrotatable shaft 131, and asecond shaft sleeve 1332 which is nested between the fixingrod 14 and the top of the second injection moldedpart 1312 at the top of the hollowrotatable shaft 131. -
FIG. 13 is a perspective view of a fourth embodiment of themotor rotor 13 of the water pump, according to the present disclosure.FIG. 14 is a cross-sectional perspective view of themotor rotor 13 ofFIG. 13 , andFIG. 15 is a cross-sectional view of themotor rotor 13 ofFIG. 13 . - In the fourth embodiment, the structures of the hollow
rotatable shaft 131 and theimpeller 132 of themotor rotor 13 are similar to those in the third embodiment, which will not be described here again. Different from the third embodiment, as shown inFIGS. 13 to 15 , themotor rotor 13 comprises ashaft sleeve 1333 which is nested between the fixingrod 14 and the hollowrotatable shaft 131 substantially along the entire axial length of the hollowrotatable shaft 131. That is, theshaft sleeve 1333 extends around the fixingrod 14, substantially from thefirst fixing portion 13121 of the second injection moldedpart 1312 and through theimpeller 132 located at the top of the second injection moldedpart 1312. - Although some embodiments have been described by way of examples herein, various variations could be made to these embodiments without departing from the spirit of the present disclosure. All such variations belong to the conception of the present disclosure and fall within the scope of protection defined by the claims of the present disclosure. The specific embodiments disclosed herein are merely illustrative of the present disclosure. It would be apparent to those skilled in the art that various modifications could be made according to the teachings of the present disclosure and the present disclosure could be practiced in various equivalent ways. Thus, the particular embodiments of the present disclosure disclosed above are illustrative only, and the scope of protection of the present disclosure is not limited by the details of the structures or designs disclosed herein. Accordingly, various substitutions, combinations, or modifications could be made to the particular exemplary embodiments disclosed herein, and all variations thereof fall within the scope of the present disclosure. The pool circulation system, water pump, and motor rotors exemplarily disclosed herein may also be suitably practiced in the absence of any element not specifically disclosed herein or in the absence of any optional components disclosed herein.
Claims (20)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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CN201822114202 | 2018-12-17 | ||
CN201822114202.5 | 2018-12-17 | ||
CN201921231450.6 | 2019-08-01 | ||
CN201921231450.6U CN210738837U (en) | 2018-12-17 | 2019-08-01 | Motor rotor for noise-reducing water pump, noise-reducing water pump and water pool circulating system |
Publications (1)
Publication Number | Publication Date |
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US20200191164A1 true US20200191164A1 (en) | 2020-06-18 |
Family
ID=70987011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/708,437 Abandoned US20200191164A1 (en) | 2018-12-17 | 2019-12-10 | Motor rotor for water pump, water pump, and pool circulation system |
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US (1) | US20200191164A1 (en) |
CN (1) | CN210738837U (en) |
Families Citing this family (1)
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CN214885919U (en) * | 2021-03-18 | 2021-11-26 | 东辉休闲运动用品(上海)有限公司 | Water pool body |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10108436A (en) * | 1996-09-27 | 1998-04-24 | Hitachi Ltd | Brushless motor and brushless canned motor pump |
US7057320B2 (en) * | 2000-11-30 | 2006-06-06 | C.D.R. Pompe S.P.A. | Mechanical drive system operating by magnetic force |
US20110033320A1 (en) * | 2007-09-13 | 2011-02-10 | Robert Bosch Gmbh | Pump rotor for a canned motor pump |
RU2419948C1 (en) * | 2009-04-28 | 2011-05-27 | Ассома Инк. | Improved design of screened electric pump (versions) |
CN106640673A (en) * | 2015-10-30 | 2017-05-10 | 浙江三花汽车零部件有限公司 | Electric drive pump |
US20200072224A1 (en) * | 2018-08-29 | 2020-03-05 | Johnson Electric International AG | Electric coolant pump and manufacturing method for movable unit of the same |
US20220065265A1 (en) * | 2019-05-10 | 2022-03-03 | Johnson Electric International AG | Electric liquid pump |
-
2019
- 2019-08-01 CN CN201921231450.6U patent/CN210738837U/en active Active
- 2019-12-10 US US16/708,437 patent/US20200191164A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10108436A (en) * | 1996-09-27 | 1998-04-24 | Hitachi Ltd | Brushless motor and brushless canned motor pump |
US7057320B2 (en) * | 2000-11-30 | 2006-06-06 | C.D.R. Pompe S.P.A. | Mechanical drive system operating by magnetic force |
US20110033320A1 (en) * | 2007-09-13 | 2011-02-10 | Robert Bosch Gmbh | Pump rotor for a canned motor pump |
RU2419948C1 (en) * | 2009-04-28 | 2011-05-27 | Ассома Инк. | Improved design of screened electric pump (versions) |
CN106640673A (en) * | 2015-10-30 | 2017-05-10 | 浙江三花汽车零部件有限公司 | Electric drive pump |
US10326328B2 (en) * | 2015-10-30 | 2019-06-18 | Zhejiang Sanhua Automotive Components Co., Ltd | Electric pump |
US20200072224A1 (en) * | 2018-08-29 | 2020-03-05 | Johnson Electric International AG | Electric coolant pump and manufacturing method for movable unit of the same |
US20220065265A1 (en) * | 2019-05-10 | 2022-03-03 | Johnson Electric International AG | Electric liquid pump |
Non-Patent Citations (1)
Title |
---|
INYOpools, "New Pool Owner's Ultimate Pool Basiscs Guide", 1/8/2015, https://web.archive.org/web/20180719181218/https://www.inyopools.com/blog/new-pool-owners-ultimate-pool-basics-guide/; retrieved 7/12/2022 (Year: 2015) * |
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