CN118128760A - Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump - Google Patents
Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump Download PDFInfo
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- CN118128760A CN118128760A CN202410277286.1A CN202410277286A CN118128760A CN 118128760 A CN118128760 A CN 118128760A CN 202410277286 A CN202410277286 A CN 202410277286A CN 118128760 A CN118128760 A CN 118128760A
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- impeller
- rotor assembly
- shaft sleeve
- impeller rotor
- water pump
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 238000001746 injection moulding Methods 0.000 claims description 95
- 238000002347 injection Methods 0.000 claims description 41
- 239000007924 injection Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 34
- 239000012778 molding material Substances 0.000 claims description 23
- 238000003466 welding Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims 1
- 239000003513 alkali Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- 239000000110 cooling liquid Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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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
-
- 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
- F04D29/046—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an impeller rotor assembly of an electronic water pump, a forming process thereof and the electronic water pump, wherein the impeller rotor assembly of the electronic water pump comprises the following components: the impeller comprises an impeller main body and blades, the rotor comprises an iron core, magnetic steel and a shaft sleeve, the iron core is provided with a magnetic steel groove, the magnetic steel is arranged in the magnetic steel groove, the iron core and the magnetic steel are in plastic package in the impeller main body to form an impeller rotor assembly I, and the shaft sleeve is secondarily injection-molded in the impeller rotor assembly I to form an impeller rotor assembly II; the impeller main body comprises a first part and a second part which are connected with each other, the blades are arranged on the first part, and the iron core and the magnetic steel are positioned in the second part; the second part is provided with a first hole and a second hole which are arranged in a step manner, the first hole is arranged close to the first part, and the diameter of the first hole is larger than that of the second hole; the first bulge is arranged on one part of the shaft sleeve, the first bulge is arranged in the first hole in a limiting mode, the second bulge is arranged on the other part of the shaft sleeve, and the second bulge is attached to the end face, away from the first part, of the second part.
Description
The application relates to an impeller rotor assembly of an electronic water pump, a forming process thereof and a divisional application of a Chinese patent application of which the application date is 2018, 8, 31, the application number is 201811015694.0 and the name is 'electronic water pump'.
Technical Field
The invention relates to the technical field of electronic water pumps, in particular to a forming process of an impeller rotor assembly of an electronic water pump, the impeller rotor assembly of the electronic water pump manufactured by adopting the forming process, and the electronic water pump comprising the impeller rotor assembly.
Background
At present, the impeller of the electronic water pump for vehicles is made of aluminum and is cast and formed, and the blades and the cover plate of the impeller are connected into blades through riveting, so that the structure has high cost and heavy weight, and the dynamic unbalance of the impeller is large due to the riveting and forming.
Chinese patent document CN104061169a discloses an impeller rotor structure, the structure adopts two-step injection molding, the first step is to inject the rotor core and the magnetic steel, the second step is to inject the first step injection molding body as the mandrel to form the impeller, the impeller rotor assembly is integrally formed, the following drawbacks exist: 1) The rotor shaft hole is used as a sliding bearing to rub with the rotating shaft, a wear-resistant material is needed, the impeller and the rotor shaft hole are integrated, and the impeller uses reinforced PPS (CF 10%), so that the cost of the impeller is increased; 2) Because different materials are adopted for twice injection molding, the inner wall of the rotor assembly is not firmly bonded with the impeller, the weight of the impeller is large, and a relatively large torque is required when the rotor drives the impeller to rotate, so that the rotor and the impeller are loosened; 3) The first injection molding adopts reinforced PPS (GF 30%), the second injection molding adopts PPS (CF 10%), both are thermoplastic materials, the injection molding melting temperature is 300-330 ℃, the volume ratio of the impeller of the second injection molding is large, the injection molding time is long, the injection molding body formed after the first injection molding is easily melted, and the iron core and the magnetic steel have the risk of shifting.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems.
Therefore, the first aspect of the invention aims to provide an impeller rotor assembly of an electronic water pump, which is manufactured by the molding process.
An object of the second aspect of the present invention is to provide a molding process of an impeller rotor assembly of an electronic water pump.
A third aspect of the present invention is directed to an electronic water pump comprising the impeller-rotor assembly described above.
In order to achieve the above object, according to a first aspect of the present invention, there is provided an impeller rotor assembly of an electronic water pump, including: the impeller comprises an impeller main body and blades, the rotor comprises an iron core, magnetic steel and a shaft sleeve, the iron core is provided with a magnetic steel groove, the magnetic steel is arranged in the magnetic steel groove, the iron core and the magnetic steel are in plastic package in the impeller main body to form an impeller rotor assembly I, and the shaft sleeve is secondarily injection-molded in the impeller rotor assembly I to form an impeller rotor assembly II; further, the impeller main body comprises a first part and a second part which are connected with each other, the blades are arranged on the first part, and the iron core and the magnetic steel are positioned in the second part; the second part is provided with a first hole and a second hole which are arranged in a step manner, the first hole is arranged close to the first part, and the diameter of the first hole is larger than that of the second hole; the first bulge extending along the radial direction of the shaft sleeve is arranged on one part of the shaft sleeve, the first bulge is arranged in the first hole in a limiting mode, the other part of the shaft sleeve penetrates through the second hole and extends out of the second part, the second bulge extending along the radial direction of the shaft sleeve is arranged on the part, extending out of the second part, of the shaft sleeve, and the second bulge is attached to the end face, far away from the first part, of the second part.
The impeller rotor component of the electronic water pump provided by the scheme comprises an impeller and a rotor, wherein the impeller comprises an impeller main body and blades; the rotor comprises an iron core, magnetic steel and a shaft sleeve, the rotor and the impeller main body are formed through a two-step injection molding process, the impeller main body is formed through a first-step injection molding process, and the shaft sleeve is formed through a second-step injection molding process, so that the impeller main body and the shaft sleeve are respectively formed through injection molding, the impeller main body can adopt lower-cost injection molding materials, and the manufacturing cost is saved; the iron core and the magnetic steel are in plastic package in the impeller main body, the bonding is firm, the size of the shaft sleeve is small, the weight is light, and the shaft sleeve is not easy to slip when the impeller rotor assembly rotates; the shaft sleeve is small in size, and the speed is high when the shaft sleeve is injection molded, so that the first impeller rotor assembly is not influenced, and the risk of iron core and magnetic steel displacement caused by melting of the impeller main body is avoided.
Wherein the first protrusion is arranged on one end of the shaft sleeve and/or the second protrusion is arranged on the other end of the shaft sleeve.
In some embodiments, optionally, the inner circle of the iron core is grooved, and the injection molding material of the injection molding sleeve is filled in the groove of the inner circle of the iron core.
When the inner circle of the iron core is grooved and the shaft sleeve is injection molded, injection molding materials are filled in the groove in the inner circle of the iron core, so that the shaft sleeve and the circumferential direction of the iron core cannot slip, and the risk that the rotor assembly and the impeller in the related art slip in the circumferential direction is well avoided.
In some embodiments, optionally, one of the blade and the second impeller rotor assembly is provided with a weld line, and the other of the blade and the second impeller rotor assembly is provided with a weld groove.
In some embodiments, optionally, the weld between the second impeller-rotor assembly and the blade is less than 0.1mm.
In some embodiments, optionally, a through groove is formed on an inner wall of the sleeve.
The inner wall of the shaft sleeve is provided with a through groove, an air gap is arranged between the stator component and the impeller rotor component of the electronic water pump, the stator component and the impeller rotor component form a water path, and the self-cooling is realized when the water pump operates; meanwhile, the cooling liquid in the water tank on the inner wall of the shaft sleeve enters a gap between the shaft sleeve and the rotating shaft, and a hydraulic film is formed when the impeller rotor rotates at a high speed, so that the lubrication effect of the sliding bearing is achieved.
In some embodiments, optionally, the second impeller-rotor assembly is integrally welded to the blade by ultrasonic welding.
In some embodiments, optionally, the blades are injection molded, the blades being the same material as the impeller body.
The technical scheme of the second aspect of the invention provides a molding process of an impeller rotor assembly of an electronic water pump, which comprises the following steps: s102, mounting non-magnetized magnetic steel in a magnetic steel groove of an iron core, placing the iron core and the magnetic steel as a first core mold in an injection mold I to form an impeller main body in an injection molding way, and forming an impeller rotor assembly I by the impeller main body, the iron core and the magnetic steel; s104, placing the impeller rotor assembly I as a core mold II in an injection mold II to form a shaft sleeve in an injection molding way, wherein the shaft sleeve and the impeller rotor assembly I become the impeller rotor assembly II.
Further, the impeller main body comprises a first part and a second part which are connected with each other, the blades are arranged on the first part, and the iron core and the magnetic steel are positioned in the second part; the second part is provided with a first hole and a second hole which are arranged in a step manner, the first hole is arranged close to the first part, and the diameter of the first hole is larger than that of the second hole; the first bulge extending along the radial direction of the shaft sleeve is arranged on one part of the shaft sleeve, the first bulge is arranged in the first hole in a limiting mode, the other part of the shaft sleeve penetrates through the second hole and extends out of the second part, the second bulge extending along the radial direction of the shaft sleeve is arranged on the part, extending out of the second part, of the shaft sleeve, and the second bulge is attached to the end face, far away from the first part, of the second part.
According to the forming process of the impeller rotor assembly of the electronic water pump, the rotor comprises the iron core, the magnetic steel and the shaft sleeve, the rotor and the impeller main body are formed through a two-step injection molding process, the impeller main body is formed through injection molding in the first step, the shaft sleeve is formed through injection molding in the second step, injection molding materials used in injection molding of the impeller main body and the shaft sleeve can be different, the injection molding materials of the impeller main body are required to be high in strength and acid and alkali resistance, the injection molding materials of the shaft sleeve are required to be wear-resistant, high in strength and acid and alkali resistance, the injection molding materials of the shaft sleeve are required to be high in cost, and the injection molding materials of the impeller main body are low in cost.
Secondly, the iron core and the magnetic steel are in plastic package in the impeller main body, and the iron core and the magnetic steel are firmly bonded with the impeller main body; the shaft sleeve is small in size and light in weight, and when the impeller rotor assembly rotates, the torque for driving the shaft sleeve to rotate is small, and the shaft sleeve is not easy to slip, so that the risk of slipping between the rotor assembly and the impeller in the circumferential direction in the related art is well solved by the scheme; and the impeller main body is large in size, the shaft sleeve is small in size, the speed is high when the shaft sleeve is injection molded, the first influence on the impeller rotor assembly is avoided, namely, the impeller main body formed by the first injection molding cannot be melted when the shaft sleeve is formed by the second injection molding, so that the risk of iron core and magnetic steel displacement caused by the fact that the injection molding body formed after the first injection molding is melted when the impeller is molded for the second time in the related technology is well avoided by the scheme.
The first portion and the second portion of the sleeve are connected to each other, wherein the first protrusion and the second protrusion may be disposed at an end of the sleeve or may be disposed at a predetermined position inside the end of the sleeve. That is, the surfaces of the first protrusion and the second protrusion that are away from each other may be flush with the end face of the end where they are located, and at the same time, the surfaces of the first protrusion and the second protrusion that are away from each other may be retracted a certain distance with respect to the end face of the end where they are located. That is, as long as the shaft sleeve is provided with the first protrusion and the second protrusion, the positions of the first protrusion and the second protrusion are not strictly required.
In addition, the forming process of the impeller rotor assembly of the electronic water pump provided by the technical scheme of the invention can also have the following additional technical characteristics:
In some embodiments, optionally, the material of the injection molded impeller body in S102 and the material of the injection molded shaft sleeve in S104 are inconsistent, and the material cost of the injection molded impeller body in S102 is lower than the material cost of the injection molded shaft sleeve in S104.
The impeller main body and the shaft sleeve are different in injection molding materials used in injection molding respectively, the material cost of the injection molding shaft sleeve is high, the material cost of the injection molding impeller main body is low, compared with the impeller rotor component formed by integrally injection molding the shaft sleeve and the impeller main body, the scheme saves the manufacturing cost, and if one-time injection molding is adopted, the material of the shaft sleeve is wear-resistant, high-strength and acid-alkali-resistant, and the impeller main body is also made of the material with high cost.
In some embodiments, optionally, the inner circle of the iron core is grooved, and the injection molding material of the injection molding sleeve is filled in the groove of the inner circle of the iron core in S104.
When the inner circle of the iron core is grooved and the shaft sleeve is injection molded, injection molding materials are filled in the groove in the inner circle of the iron core, so that the shaft sleeve and the circumferential direction of the iron core cannot slip, and the risk that the rotor assembly and the impeller in the related art slip in the circumferential direction is well avoided.
In some embodiments, optionally, one of the blade and the second impeller rotor assembly is provided with a weld line, and the other of the blade and the second impeller rotor assembly is provided with a weld groove.
In some embodiments, optionally, the weld between the second impeller-rotor assembly and the blade is less than 0.1mm.
In some embodiments, optionally, after S104, the method further includes: s106, welding the impeller rotor assembly II and the blades into a whole by ultrasonic waves to form an impeller rotor assembly III; s108, magnetizing the impeller rotor assembly III to obtain the impeller rotor assembly.
The impeller comprises an impeller main body and blades, the impeller is formed by an ultrasonic welding process, and the blades and the impeller rotor assembly II are subjected to ultrasonic welding to form an impeller rotor assembly III; the injection mold for the integral injection molding of the impeller is complex in structure and high in maintenance cost, so that the impeller is divided into two parts of an impeller main body and a blade, wherein one part of the blade and a second impeller rotor assembly is provided with a welding line, the other part of the blade and the second impeller rotor assembly is provided with a welding groove, for example, the blade is provided with the welding line, the second impeller rotor assembly is provided with the welding groove, and the injection mold is molded by ultrasonic welding.
In some embodiments, optionally, before S106, the method further includes: s105, the blade is injection molded by the material for injection molding the impeller main body in S102.
The blade adopts the material injection molding of the impeller main body, so that the blade is convenient to mold and is convenient to carry out ultrasonic welding operation on the blade and the impeller main body.
The technical scheme of the third aspect of the invention provides an electronic water pump, which comprises a pump shell, a controller, a stator assembly, a machine shell, a rotating shaft and the impeller rotor assembly according to any one of the technical schemes, wherein the machine shell is arranged between the pump shell and the controller, the impeller rotor assembly is inserted into the rotating shaft, and a shaft sleeve of the impeller rotor assembly is in clearance fit with the rotating shaft.
According to the electronic water pump provided by the technical scheme of the invention, the shaft sleeve is integrated with the rotor as the sliding bearing, the impeller rotor assembly is in clearance fit with the rotating shaft through the shaft sleeve, preferably, the fit length of the shaft sleeve and the rotating shaft is 25-30 mm, the running is stable, the rotor cannot shake eccentrically, and the bearing is not required to be fixed or aligned; when the water pump runs, the impeller rotor assembly axially moves, when the impeller rotor assembly moves towards the pump shell, the upper surface of the shaft sleeve rubs with a part at the bottom of the pump shell (such as a D-shaped gasket arranged at the bottom of the pump shell), when the impeller rotor assembly moves towards the bottom of the pump shell, the lower surface of the shaft sleeve rubs with the bottom of the pump shell, and the shaft sleeve adopts wear-resistant materials; preferably, the inner wall of the shaft sleeve is provided with a through groove which is communicated with an air gap between the stator assembly and the impeller rotor assembly, and the cooling liquid flows when the water pump runs, so that self-cooling is realized.
In some technical schemes, optionally, the casing is a casing injection molding body, the rotating shaft is embedded into the casing injection molding body, and the rotating shaft and the casing injection molding body form a casing rotating shaft assembly; or the stator assembly is integrally injection-molded, the shell is a shell injection-molded body, the stator assembly is in plastic package inside the shell injection-molded body, the rotating shaft is embedded inside the shell injection-molded body, and the stator assembly, the rotating shaft and the shell injection-molded body form the shell assembly.
The rotating shaft and the shell can be fixed into a shell rotating shaft component through injection molding; the stator assembly can be integrally injection molded, and then the shell assembly is injection molded, so that the stator assembly is in plastic package in the shell injection molding body to form self-sealing.
In some technical schemes, optionally, the pump shell is fixedly connected with the front end of the shell through a screw, and a first sealing ring is arranged between the pump shell and the shell; the controller is fixedly connected with the rear end of the shell through a screw, and a second sealing ring is arranged between the controller and the shell.
The pump shell and the controller are fixed with the shell through screws such as self-tapping screws; the rotating shaft and the shell are fixed through injection molding, the impeller rotor component is inserted into the rotating shaft, and the shaft sleeve and the rotating shaft form clearance fit; when the water pump runs, the impeller rotor assembly axially moves, when the impeller rotor assembly moves towards the pump shell, the upper surface of the shaft sleeve rubs with a part at the bottom of the pump shell (such as a D-shaped gasket arranged at the bottom of the pump shell), when the impeller rotor assembly moves towards the bottom of the pump shell, the lower surface of the shaft sleeve rubs with the bottom of the pump shell, and the shaft sleeve is made of wear-resistant materials.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow diagram of a process for forming an impeller rotor assembly of an electronic water pump according to one embodiment of the invention;
FIG. 2 is a flow chart of a molding process of an impeller rotor assembly of an electronic water pump according to another embodiment of the invention;
FIG. 3 is an exploded view of an impeller rotor assembly of an electronic water pump according to one embodiment of the invention;
FIG. 4 is a schematic structural view of an impeller rotor assembly one embodiment of the present invention;
FIG. 5 is a schematic structural view of a second impeller rotor assembly according to one embodiment of the present invention;
FIG. 6 is a schematic structural view of an impeller rotor assembly III according to one embodiment of the present invention;
FIG. 7 is a schematic view of the assembled construction of an impeller-rotor assembly according to one embodiment of the present invention;
FIG. 8 is a schematic view of an electronic water pump according to an embodiment of the present invention;
Fig. 9 is a schematic structural view of a housing hinge assembly according to an embodiment of the present invention.
Wherein, the correspondence between the reference numerals and the component names in fig. 3 to 9 is:
The novel rotor type motor comprises a shaft sleeve 1, a first bulge 102, a second bulge 104, 2 magnetic steel, a3 iron core, a 4 impeller main body, a 41 welding groove, a 43 first part, a 45 second part, a 452 first hole, a 454 second hole, 5 blades, 51 welding lines, a 6 impeller rotor component I, a 7 impeller rotor component II, a 8 impeller rotor component III, a 9 impeller rotor component, a 10 electronic water pump, a 11 pump shell, a 12 controller, a 13 stator component, a 14 casing rotating shaft component, a 15 second sealing ring, a 16 casing and a 17 rotating shaft.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
An impeller rotor assembly of an electronic water pump and a molding process thereof, and an electronic water pump according to some embodiments of the present invention are described below with reference to fig. 1 to 9.
As shown in fig. 1 and 2, a process for forming an impeller rotor assembly of an electronic water pump according to some embodiments of the present invention includes the following steps:
S102, mounting non-magnetized magnetic steel 2 in a magnetic steel groove of an iron core 3, then placing the iron core 3 and the magnetic steel 2 as a first core mold in an injection mold I to form an impeller main body 4 in an injection mode, and forming the impeller main body 4, the iron core 3 and the magnetic steel 2 into an impeller rotor assembly I6;
S104, placing the impeller rotor assembly I6 as a core mold II in an injection mold II to form a shaft sleeve 1 in an injection molding way, and enabling the shaft sleeve 1 and the impeller rotor assembly I6 to form an impeller rotor assembly II 7.
Preferably, the material of the injection molding impeller main body 4 in S102 is inconsistent with the material of the injection molding shaft sleeve 1 in S104, and the material of the injection molding impeller main body 4 is required to be high-strength and acid and alkali resistant; the material requirement of the injection molding shaft sleeve 1 is wear resistance, high strength and acid and alkali resistance; both injection molding materials are thermoplastic materials; the injection molding materials used in the injection molding of the impeller main body 4 and the shaft sleeve 1 are different, the injection molding material used in the shaft sleeve 1 is high in cost, the injection molding material used in the impeller main body 4 is low in cost, compared with the impeller rotor assembly in which the shaft sleeve 1 and the impeller main body 4 are integrally injection molded, the scheme saves the manufacturing cost, and if the injection molding is adopted for one time, the material used in the shaft sleeve 1 is wear-resistant, high-strength and acid-alkali-resistant, and the material is also used in the impeller main body 4, so that the cost is high.
The impeller main body 4 is large in size, the shaft sleeve 1 is small in size, the speed is high when the shaft sleeve 1 is injection molded, the first impeller rotor assembly 6 cannot be influenced, the inner circle of the iron core 3 is grooved, and when the shaft sleeve 1 is injection molded, injection molding materials are filled in the grooves in the inner circle of the iron core 3, so that the shaft sleeve 1 and the iron core 3 cannot slip in the circumferential direction.
Further, as shown in fig. 6, the impeller main body 4 includes a first portion 43 and a second portion 45 connected to each other, the blades 5 are mounted on the first portion 43, and the iron core 3 and the magnetic steel 2 are located in the second portion 45; the second portion 45 is provided with a first hole 452 and a second hole 454 which are arranged in a step manner, the first hole 452 is arranged close to the first portion 43, and the diameter of the first hole 452 is larger than that of the second hole 454; a first protrusion 102 extending along the radial direction of the shaft sleeve 1 is arranged on one part of the shaft sleeve 1, the first protrusion 102 is mounted in the first hole 452 in a limiting mode, the other part of the shaft sleeve 1 penetrates through the second hole 454 and extends out of the second part 45, a second protrusion 104 extending along the radial direction of the shaft sleeve 1 is arranged on the part, extending out of the second part 45, of the shaft sleeve 1, and the second protrusion 104 is attached to the end face, away from the first part 43, of the second part 45.
In one embodiment, as shown in fig. 2, the process for forming the impeller rotor assembly of the electronic water pump comprises the following steps:
S102, mounting non-magnetized magnetic steel 2 in a magnetic steel groove of an iron core 3, then placing the iron core 3 and the magnetic steel 2 as a first core mold in an injection mold I (positioning up and down by propping the surface of the iron core 3 and the surface of the magnetic steel 2 (non-magnetized) through a thimble and taking a middle hole of the iron core 3 as a reference) to injection-mold an impeller main body 4, wherein the impeller main body 4, the iron core 3 and the magnetic steel 2 form an impeller rotor assembly I6, as shown in FIG. 4; the injection molding material is filled into the circular groove in the iron core 3, so that the iron core 3 and the impeller main body 4 cannot rotate, the injection molding material is reinforced PPS (GF 30-40%), and the injection molding temperature is 300-330 ℃;
S104, placing the impeller rotor assembly I6 as a core mold II in an injection mold II (by positioning the ejector pins up and down and taking the outer circle of the impeller rotor assembly I6 as a reference) to injection-mold the shaft sleeve 1, wherein the shaft sleeve 1 and the impeller rotor assembly I6 form an impeller rotor assembly II 7, as shown in FIG. 5; the injection molding material is reinforced PPS (CF 10-30%), and the injection molding temperature is 300-330 ℃;
S105, injection molding the blade 5 by using the material of the injection molding impeller main body 4 in S102;
s106, welding the impeller rotor assembly II 7 and the blades 5 into a whole by ultrasonic waves to form an impeller rotor assembly III 8, as shown in FIG. 6; the pulling-out force of the impeller rotor assembly II 7 and the blade 5 is more than 1000N, and the welding line is less than 0.1mm;
s108, magnetizing the impeller rotor assembly III 8 to obtain the impeller rotor assembly 9, as shown in FIG. 7.
The injection molding materials of the impeller main body 4 injection molded in the S102 are different from those of the shaft sleeve 1 injection molded in the S104, the material cost of the injection molding of the impeller main body 4 is lower than that of the injection molding of the shaft sleeve 1, the shaft sleeve 1 is characterized by wear resistance, high strength and acid and alkali resistance, the impeller main body 4 is characterized by high strength and acid and alkali resistance, and the impeller main body 4 and the blade 5 can be conveniently subjected to ultrasonic welding, so that the impeller main body 4 and the shaft sleeve 1 are made of two different injection molding materials, and the S102 and the S104 are subjected to two-step injection molding.
The step S105 of injection molding the blade 5 is not limited to the step S104 and may be performed before the step S104.
The impeller rotor component of the electronic water pump manufactured by adopting the molding process comprises a shaft sleeve 1, magnetic steel 2, an iron core 3, an impeller main body 4 and blades 5, wherein the impeller main body 4 is formed by first injection molding, and the shaft sleeve 1 is formed by second injection molding; the impeller main body 4, the iron core 3 and the magnetic steel 2 (not magnetized), the shaft sleeve 1 are subjected to injection molding twice in the steps S102 and S104 to form an impeller rotor assembly II 7, the blades 5 are subjected to injection molding in the step S105, and the impeller rotor assembly III 8 is obtained in the step S106; the impeller rotor assembly 9 is obtained by step S108.
The magnetic steel 2 is preferably made of neodymium iron boron materials, and has the characteristics of high-temperature demagnetization, and the impeller rotor assembly is obtained by externally magnetizing the molded impeller rotor assembly III 8.
Preferably, the inner wall of the shaft sleeve 1 is provided with a through groove, a gap is arranged between the stator component 13 and the impeller rotor component 9 of the electronic water pump 10, the through groove is communicated with the gap, and the cooling liquid flows to cool when the water pump operates.
Ultrasonic welding of impeller rotor subassembly two 7 and blade 5 takes shape, and bonding wire 51 sets up on blade 5, and welding groove 41 sets up on impeller rotor subassembly two 7, obtains welding groove 41 through moulding plastics impeller main part 4.
The injection molding impeller main body 4 is provided with an error-proofing structure, and is correctly positioned when the impeller rotor assembly III 8 is magnetized, so that the magnetic steel 2 (which is not magnetized) is aligned with the magnetizing coil.
Further, as shown in fig. 6, the impeller main body 4 includes a first portion 43 and a second portion 45 connected to each other, the blades 5 are mounted on the first portion 43, and the iron core 3 and the magnetic steel 2 are located in the second portion 45; the second portion 45 is provided with a first hole 452 and a second hole 454 which are arranged in a step manner, the first hole 452 is arranged close to the first portion 43, and the diameter of the first hole 452 is larger than that of the second hole 454; a first protrusion 102 extending along the radial direction of the shaft sleeve 1 is arranged on one part of the shaft sleeve 1, the first protrusion 102 is mounted in the first hole 452 in a limiting mode, the other part of the shaft sleeve 1 penetrates through the second hole 454 and extends out of the second part 45, a second protrusion 104 extending along the radial direction of the shaft sleeve 1 is arranged on the part, extending out of the second part 45, of the shaft sleeve 1, and the second protrusion 104 is attached to the end face, away from the first part 43, of the second part 45.
The embodiment of the invention provides an electronic water pump, as shown in fig. 8, which comprises a pump shell 11, a controller 12, an impeller rotor assembly 9, a stator assembly 13, a shell rotating shaft assembly 14 and a sealing ring; the pump shell 11 and the controller 12 are fixed with the shell 16 through screws such as self-tapping screws, a first sealing ring is arranged between the pump shell 11 and the shell 16, and a second sealing ring 15 is arranged between the controller 12 and the shell 16; the rotary shaft 17 is used as a mandrel three to be molded into a shell 16, and the shell 16 and the rotary shaft 17 form a shell rotary shaft assembly 14, as shown in fig. 9; the impeller rotor assembly 9 is inserted into the rotating shaft 17, and the shaft sleeve 1 and the rotating shaft 17 form clearance fit; the gap fit length of the shaft sleeve 1 and the rotating shaft 17 is 25-30 mm, the cooling liquid forms a hydraulic mould in the gap between the impeller rotor assembly 9 and the rotating shaft 17 when the impeller rotor assembly 9 runs, and the impeller rotor assembly 9 cannot deflect.
When the electronic water pump 10 operates, the impeller rotor assembly 9 axially moves, when moving towards the direction of the pump shell 11, the upper surface of the shaft sleeve 1 rubs with a part at the bottom of the pump shell 11 (such as a D-shaped gasket arranged at the bottom of the pump shell 11), when moving towards the bottom of the shell 16, the lower surface of the shaft sleeve 1 rubs with the bottom of the shell 16, and the shaft sleeve 1 adopts a wear-resistant material: PPS (CF 10-30%).
According to the electronic water pump 10 provided by the scheme, the shaft sleeve 1 is used as a sliding bearing to be integrated with the rotor, the rotating shaft 17 is fixed with the shell 16, the impeller rotor assembly 9 is inserted into the rotating shaft 17 to form clearance fit, the shaft sleeve 1 is made of wear-resistant materials, the inner wall of the shaft sleeve 1 is provided with the through groove which is communicated with the air gap between the stator assembly 13 and the impeller rotor assembly 9, and the cooling liquid flows when the water pump runs, so that self-cooling is realized.
Of course, the stator assembly 13 may be integrally injection molded, and then the housing assembly is injection molded, the housing 16 is a housing injection molded body, the stator assembly 13 is injection molded inside the housing injection molded body, the rotating shaft 17 is embedded inside the housing injection molded body, and the stator assembly 13, the rotating shaft 17 and the housing injection molded body form a housing assembly, so that the stator assembly 13 is injection molded inside the housing injection molded body to form self-sealing.
Specifically, the electronic water pump is an electronic water pump for a vehicle.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or unit referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral or electrical connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. An impeller rotor assembly of an electronic water pump, comprising:
The impeller comprises an impeller main body and blades, the rotor comprises an iron core, magnetic steel and a shaft sleeve, a magnetic steel groove is formed in the iron core, the magnetic steel is installed in the magnetic steel groove, the iron core and the magnetic steel are in plastic package in the impeller main body to form an impeller rotor assembly I, and the shaft sleeve is secondarily injection-molded in the impeller rotor assembly I to form an impeller rotor assembly II;
the impeller main body comprises a first part and a second part which are connected with each other, the blades are arranged on the first part, and the iron core and the magnetic steel are positioned in the second part;
the second part is provided with a first hole and a second hole which are arranged in a step manner, the first hole is arranged close to the first part, and the diameter of the first hole is larger than that of the second hole;
The first protrusion extending along the radial direction of the shaft sleeve is arranged on one part of the shaft sleeve, the first protrusion is arranged in the first hole in a limiting mode, the other part of the shaft sleeve penetrates through the second hole and extends out of the second part, the second protrusion extending along the radial direction of the shaft sleeve is arranged on the part, extending out of the second part, of the shaft sleeve, and the second protrusion is attached to the end face, away from the first part, of the second part.
2. The impeller rotor assembly of an electronic water pump of claim 1, wherein the inner circle of the iron core is grooved, and injection molding material for injection molding the shaft sleeve is filled in the grooves of the inner circle of the iron core.
3. The impeller rotor assembly of an electronic water pump according to claim 1 or 2, wherein one of the vane and the impeller rotor assembly two is provided with a weld line, and the other of the vane and the impeller rotor assembly two is provided with a weld groove; and/or
And the welding seam between the impeller rotor assembly II and the blade is smaller than 0.1mm.
4. The impeller rotor assembly of an electronic water pump according to claim 1 or 2, wherein the blades are injection molded; and/or
And the impeller rotor assembly II and the blades are welded into a whole through ultrasonic waves.
5. The impeller rotor assembly of an electronic water pump according to claim 1 or 2, wherein the blades are injection molded, the blades and the impeller body being of the same material.
6. The impeller-rotor assembly of an electronic water pump according to any one of claims 1 to 5, characterized in that the inner wall of the sleeve is provided with through grooves, which are in communication with the air gap between the stator assembly and the impeller-rotor assembly.
7. A process for forming an impeller rotor assembly of an electronic water pump, comprising:
S102, mounting non-magnetized magnetic steel in a magnetic steel groove of an iron core, and then placing the iron core and the magnetic steel as a first core mold in an injection mold I to form an impeller main body in an injection molding way, wherein the impeller main body, the iron core and the magnetic steel form an impeller rotor assembly I;
S104, placing the impeller rotor assembly I as a core mold II in an injection mold II to form a shaft sleeve in an injection mode, wherein the shaft sleeve and the impeller rotor assembly I form an impeller rotor assembly II;
the impeller main body comprises a first part and a second part which are connected with each other, the blades are arranged on the first part, and the iron core and the magnetic steel are positioned in the second part;
the second part is provided with a first hole and a second hole which are arranged in a step manner, the first hole is arranged close to the first part, and the diameter of the first hole is larger than that of the second hole;
The first protrusion extending along the radial direction of the shaft sleeve is arranged on one part of the shaft sleeve, the first protrusion is arranged in the first hole in a limiting mode, the other part of the shaft sleeve penetrates through the second hole and extends out of the second part, the second protrusion extending along the radial direction of the shaft sleeve is arranged on the part, extending out of the second part, of the shaft sleeve, and the second protrusion is attached to the end face, away from the first part, of the second part.
8. The process for molding an impeller rotor assembly of an electronic water pump according to claim 7, wherein,
The material of the impeller main body in S102 is inconsistent with the material of the shaft sleeve in S104, and the material cost of the impeller main body in S102 is lower than the material cost of the shaft sleeve in S104.
9. The process for molding an impeller rotor assembly of an electronic water pump according to claim 7, wherein,
And S104, the inner circle of the iron core is grooved, and the injection molding material for injection molding the shaft sleeve is filled in the groove in the inner circle of the iron core.
10. The process for forming an impeller rotor assembly of an electronic water pump according to any one of claims 7 to 9, wherein one of the vane and the impeller rotor assembly two is provided with a weld line, and the other of the vane and the impeller rotor assembly two is provided with a weld groove; and/or
And the welding seam between the impeller rotor assembly II and the blade is smaller than 0.1mm.
11. The process of forming an impeller rotor assembly of an electronic water pump according to any one of claims 7 to 9, further comprising, after S104:
S106, welding the impeller rotor assembly II and the blades into a whole through ultrasonic waves to form an impeller rotor assembly III;
s108, magnetizing the impeller rotor assembly III to obtain the impeller rotor assembly.
12. The process for forming an impeller rotor assembly of an electronic water pump according to any one of claims 7 to 9, characterized by further comprising, before S106:
S105, the blade is injection molded by the material for injection molding the impeller main body in S102.
13. An electronic water pump, comprising a pump housing, a controller, a stator assembly, a casing, a rotating shaft and the impeller rotor assembly according to any one of claims 1 to 6, wherein the casing is arranged between the pump housing and the controller, the impeller rotor assembly is inserted into the rotating shaft, and a shaft sleeve of the impeller rotor assembly is in clearance fit with the rotating shaft.
14. The electronic water pump of claim 13, wherein the water pump is configured to,
The shell is a shell injection molding body, the rotating shaft is embedded into the shell injection molding body, and the rotating shaft and the shell injection molding body form a shell rotating shaft assembly; or (b)
The stator assembly is integrally formed by injection molding, the shell is a shell injection molding body, the stator assembly is in the shell injection molding body in a plastic package mode, the rotating shaft is embedded into the shell injection molding body, and the stator assembly, the rotating shaft and the shell injection molding body form the shell assembly.
15. The electronic water pump of claim 13, wherein the water pump is configured to,
The pump shell is fixedly connected with the front end of the shell through a screw, and a first sealing ring is arranged between the pump shell and the shell;
the controller is fixedly connected with the rear end of the shell through a screw, and a second sealing ring is arranged between the controller and the shell.
16. The electronic water pump of any one of claims 13 to 15, wherein,
The matching length of the shaft sleeve and the rotating shaft is 25-30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410277286.1A CN118128760A (en) | 2018-08-31 | 2018-08-31 | Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410277286.1A CN118128760A (en) | 2018-08-31 | 2018-08-31 | Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump |
| CN201811015694.0A CN110871545A (en) | 2018-08-31 | 2018-08-31 | Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump |
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| CN201811015694.0A Division CN110871545A (en) | 2018-08-31 | 2018-08-31 | Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump |
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| CN201811015694.0A Pending CN110871545A (en) | 2018-08-31 | 2018-08-31 | Impeller rotor assembly of electronic water pump, forming process of impeller rotor assembly and electronic water pump |
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| WO2007046565A1 (en) * | 2005-10-21 | 2007-04-26 | Myung Hwa Ind. Co., Ltd. | Method of manufacturing water pump impeller assembly using injection mold |
| CN104061169B (en) * | 2014-06-26 | 2016-09-21 | 常州市东南电器电机股份有限公司 | Vehicle electronic water pump and vane rotor assembly thereof |
| CN106194756B (en) * | 2015-04-30 | 2020-02-14 | 浙江三花汽车零部件有限公司 | Centrifugal pump manufacturing method |
| CN106286378B (en) * | 2015-05-20 | 2020-12-01 | 浙江三花汽车零部件有限公司 | Centrifugal pump |
| CN106321506B (en) * | 2015-07-06 | 2020-06-23 | 浙江三花汽车零部件有限公司 | Rotor assembly and electric drive pump |
| CN206054323U (en) * | 2016-08-31 | 2017-03-29 | 长沙多浦乐泵业科技有限公司 | A kind of micropump with simple efficient rotor |
| CN208749654U (en) * | 2018-08-31 | 2019-04-16 | 广东美的环境科技有限公司 | Electronic water pump and impeller rotor assembly thereof |
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