阅读说明：本技术 一种电子水泵叶轮转子注塑总成 (Electronic water pump impeller rotor injection molding assembly ) 是由 王德安 于 2021-09-30 设计创作，主要内容包括：本发明涉及电子水泵领域,具体是一种电子水泵叶轮转子注塑总成,包括按照顺序依次连接的叶轮盖、石墨轴承、叶轮包塑、铁芯、磁钢、转子包塑,所述的铁芯与磁钢粘贴配合,所述的铁芯与磁钢、石墨轴承与叶轮包塑包塑后均放入模具中进行注塑,所述的石墨轴承与叶轮包塑注塑后通过超声波与叶轮盖焊接,为了解决PPS注塑变形使中孔尺寸不均匀,使叶轮转子总成与电机总成不能有效配合,本发明采用石墨轴承预先机加工出来,中孔尺寸及圆度、圆柱度得到保证后与电机轴间隙配合均匀,从而降低振动、噪音,延长水泵寿命。(The invention relates to the field of electronic water pumps, in particular to an injection molding assembly of an impeller rotor of an electronic water pump, which comprises an impeller cover, a graphite bearing, an impeller plastic-coated part, an iron core, magnetic steel and a rotor plastic-coated part which are sequentially connected, wherein the iron core is adhered and matched with the magnetic steel, the iron core, the magnetic steel, the graphite bearing and the impeller plastic-coated part are all placed in a mold for injection molding, the graphite bearing and the impeller plastic-coated part are welded with the impeller cover through ultrasonic waves after being subjected to plastic-coated part injection molding, and in order to solve the problem that the size of a middle hole is not uniform due to PPS (polyphenylene sulfide) injection molding deformation, so that the impeller rotor assembly and a motor assembly cannot be effectively matched, the graphite bearing is machined in advance, and the size, the roundness and the cylindricity of the middle hole are ensured and then are in clearance fit with a motor shaft uniformly, so that vibration and noise are reduced, and the service life of the water pump is prolonged.)

1. The utility model provides an electronic water pump impeller rotor assembly of moulding plastics, includes that the impeller lid (1), graphite bearing (2), impeller package that connect gradually according to the order mould (3), iron core (4), magnet steel (5), rotor package mould (6), its characterized in that: iron core (4) paste the cooperation with magnet steel (5), iron core (4) and magnet steel (5), graphite bearing (2) and impeller package mould (3) and all put into the mould after moulding and mould plastics, graphite bearing (2) and impeller package mould (3) and mould plastics the back and weld through ultrasonic wave and impeller lid (1).

2. The electronic water pump impeller rotor injection molding assembly of claim 1, wherein: the surface of the graphite bearing (2) is provided with a knurl (21) for increasing holding force and preventing bearing stress and impeller from falling off.

3. The electronic water pump impeller rotor injection molding assembly of claim 1, wherein: graphite bearing (2) inside be provided with and be used for discharging whole car pipeline foreign matter enter double helix groove (22) in the electronic water pump intracavity.

4. The electronic water pump impeller rotor injection molding assembly of claim 1, wherein: an end surface groove (23) is arranged on the graphite bearing (2).

5. The electronic water pump impeller rotor injection molding assembly of claim 1, wherein: the graphite bearing (2) and the impeller plastic-coated (3) are molded into an impeller plastic-coated assembly.

6. The electronic water pump impeller rotor injection molding assembly of claim 1, wherein: the iron core (4), the magnetic steel (5) and the rotor plastic-coated assembly (6) form a rotor plastic-coated assembly.

Technical Field

The invention relates to the field of electronic water pumps, in particular to an injection molding assembly for an impeller rotor of an electronic water pump.

Background

The rotation speed of the electronic water pump is closely related to other performance parameters, a certain rotation speed generates a certain flow and lift and corresponds to a certain shaft power, when the rotation speed changes, other performance parameters are caused to correspondingly change, and the water pump is designed according to a certain rotation speed, so that the power of a matched power machine meets the operating condition requirement of the water pump, and the rotation speed of the matched power machine is consistent with the rotation speed of the water pump.

The reason for reducing the rotating speed of the water pump impeller is as follows:

1. mechanical failure of the water pump itself: the impeller and a pump shaft fastening nut are loosened or a pump shaft is deformed and bent, so that the impeller moves more, the impeller directly rubs with a pump body, or a bearing is damaged, and the rotating speed of the water pump can be reduced;

2. the maintenance efficiency of the motor is reduced: the motor loses magnetism due to the burning of the winding, the number of turns of the winding, the wire diameter and the wiring method are changed in maintenance, or the rotating speed of the water pump is changed due to the fact that the fault is not thoroughly eliminated in maintenance;

3. human factors: some users can be randomly driven by another motor due to the damage of the original motor, and as a result, the results of small flow, low lift and even no water supply are caused;

4. the water pump has the advantages that sundries are blocked in the water pump cavity and can be wound, the rotating speed of the impeller is reduced, other accessories need to be replaced, the fourth accessory is a phenomenon which can be avoided in the using process, and therefore the internal cleanness and the coaxiality improvement of the electronic water pump are greatly needed.

Disclosure of Invention

In order to solve the problems, the invention provides an injection molding assembly for an impeller rotor of an electronic water pump.

The utility model provides an electronic water pump impeller rotor assembly of moulding plastics, includes that the impeller lid, graphite bearing, impeller package that connect gradually in order mould, iron core, magnet steel, rotor package and mould, iron core and magnet steel paste the cooperation, iron core and magnet steel, graphite bearing and impeller package mould all put into the mould after moulding plastics with the impeller package, graphite bearing and impeller package mould plastics and pass through ultrasonic wave and impeller lid welding after moulding plastics.

The graphite bearing surface be provided with and be used for increasing the annular knurl that holds power and prevent bearing atress and impeller and drop.

The graphite bearing is internally provided with a double spiral groove for discharging foreign matters in a finished automobile pipeline into the cavity of the electronic water pump.

The graphite bearing is provided with an end surface groove.

The graphite bearing and the impeller are coated with plastic and then are molded into an impeller coating assembly.

The iron core, the magnetic steel and the rotor are coated and molded to form a rotor coating and molding assembly.

The invention has the beneficial effects that: the invention mainly solves the problems that the size, roundness and cylindricity of a middle hole are poor due to the shrinkage deformation of plastics after an impeller assembly is injected by PPS materials, so that the vibration and noise of an electronic water pump are high, and in order to solve the problems that the size of the middle hole is not uniform due to the injection deformation of the PPS, so that an impeller rotor assembly and a motor assembly cannot be effectively matched, the impeller rotor assembly and the motor assembly are machined in advance by using a graphite bearing, and the size, the roundness and the cylindricity of the middle hole are ensured and then are in clearance fit with a motor shaft uniformly, so that the vibration and the noise are reduced, and the service life of the water pump is prolonged.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic illustration of an assembled explosive structure according to the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view of a double spiral groove structure of the graphite bearing of the present invention;

FIG. 4 is a schematic view of an end face groove and knurling structure of the graphite bearing of the present invention;

FIG. 5 is a schematic perspective view of the impeller plastic-coated assembly of the present invention;

fig. 6 is a schematic perspective view of a rotor plastic-coated assembly according to the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.

As shown in fig. 1 to 6, an electronic water pump impeller rotor assembly of moulding plastics, mould 3, iron core 4, magnet steel 5, rotor package including impeller lid 1, graphite bearing 2, impeller package that connect gradually according to the order and mould 6, iron core 4 and magnet steel 5 paste the cooperation, iron core 4 and magnet steel 5, graphite bearing 2 and impeller package mould 3 package and all put into the mould after moulding plastics, graphite bearing 2 and impeller package mould 3 and mould plastics the back and weld through ultrasonic wave and impeller lid 1.

The invention mainly solves the problems that the size, roundness and cylindricity of a middle hole are poor due to the plastic shrinkage deformation after an impeller assembly is injected by PPS material, so that the vibration and noise of an electronic water pump are high, and in order to solve the problems that the size of the middle hole is not uniform due to the PPS injection deformation, so that an impeller rotor assembly and a motor assembly cannot be effectively matched, the impeller rotor assembly and the motor assembly are machined in advance by using the graphite bearing 2, and the size, the roundness and the cylindricity of the middle hole are ensured to be uniformly matched with a motor shaft in a clearance manner, so that the vibration and the noise are reduced, and the service life of the water pump is prolonged.

As shown in fig. 5, the graphite bearing 2 and the impeller plastic-coated 3 are formed into an impeller plastic-coated assembly after injection molding.

As shown in fig. 6, the iron core 4, the magnetic steel 5 and the rotor plastic-coated 6 form a rotor plastic-coated assembly.

Graphite bearing 2 surface be provided with and be used for increasing the annular knurl 21 that holds power and prevent bearing atress and impeller to drop, the design of 2 surperficial annular knurls 21 of graphite bearing, the purpose increases the power of holding tightly of graphite bearing 2 and PPS + GF40 material.

As shown in fig. 3, a double spiral groove 22 for removing foreign matters in the pipeline of the whole vehicle into the cavity of the electronic water pump is arranged in the graphite bearing 2.

As shown in fig. 4, the graphite bearing 2 is provided with an end surface groove 23 for discharging foreign matters.

The double spiral grooves 22 in the graphite bearing 2 mainly discharge foreign matters in the pipeline of the whole vehicle into the cavity of the electronic water pump, and the foreign matters are discharged along the spiral grooves of the graphite bearing 2 and discharged from the end surface grooves 23 after reaching the end surface because the electronic water pump rotates.

The using method comprises the following steps:

firstly, after magnetic steel 5 is pasted with an iron core 4, the magnetic steel is placed into a mold for rotor plastic coating 6, after the rotor plastic coating 6, the rotor plastic coating 6 is placed into an impeller assembly mold for injection molding, besides the rotor plastic coating 6 assembly, a graphite bearing 2 is also placed into the mold for injection molding, and after the rotor plastic coating 6 assembly is completed, ultrasonic welding is carried out on an impeller cover 1.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.