阅读说明：本技术 一种磁悬浮电机定子防护用灌胶方法 (Glue filling method for protecting stator of magnetic suspension motor ) 是由 王文明 倪益明 黄黎清 于 2021-08-17 设计创作，主要内容包括：本发明涉及的磁悬浮电机定子防护用灌胶方法,包括包括胶水处理、工装及定子预处理、胶水混合、灌胶处理、固化及脱模等步骤。胶水处理包括提供第一胶水和第二胶水,将第一胶水和第二胶水分别预热至80℃-90℃,然后将存储第一胶水的料罐的真空度调整至2mba,并持续搅拌直至第一胶水的表面无可视气泡,将存储第二胶水的料罐的真空度调整至5mba,并持续搅拌直至第二胶水的表面无可视气泡通过将第一胶液和第二胶液放置在料罐中进行搅拌,能够对第一胶液和第二胶液中的气泡进行有效去除,从而降低灌胶液中的气泡,进而有效降低形成在定子表面上的胶层产生气孔的几率。(The invention relates to a glue filling method for protecting a magnetic suspension motor stator, which comprises the steps of glue treatment, tool and stator pretreatment, glue mixing, glue filling treatment, curing, demolding and the like. The glue treatment comprises the steps of providing first glue and second glue, preheating the first glue and the second glue to 80-90 ℃, adjusting the vacuum degree of a material tank for storing the first glue to 2mba, continuously stirring until no visible bubbles exist on the surface of the first glue, adjusting the vacuum degree of a material tank for storing the second glue to 5mba, continuously stirring until no visible bubbles exist on the surface of the second glue, placing the first glue and the second glue in the material tank for stirring, and effectively removing the bubbles in the first glue and the second glue, so that the bubbles in the glue can be reduced, and the probability of air holes generated in a glue layer formed on the surface of a stator can be effectively reduced.)

1. A glue filling method for protecting a stator of a magnetic suspension motor is characterized by comprising the following steps:

glue treatment: providing first glue and second glue, respectively preheating the first glue and the second glue to 80-90 ℃, then adjusting the vacuum degree of a charging bucket for storing the first glue to 2mba, continuously stirring until no visible bubbles exist on the surface of the first glue, adjusting the vacuum degree of a charging bucket for storing the second glue to 5mba, and continuously stirring until no visible bubbles exist on the surface of the second glue;

tool and stator pretreatment: uniformly coating a release agent on the outer surface of a tool, cleaning the inner surface and the outer surface of a stator to be subjected to glue pouring, assembling the stator on the tool to form an assembly body, and then transferring the assembly body into an oven to preheat for 1-3 hours at 110 ℃;

mixing glue: the weight ratio of the raw materials is 1: 1, matching the first glue and the second glue after stirring, and then mixing the first glue and the second glue through a static mixing pipe to form a glue filling liquid;

and (3) glue pouring treatment: transferring the assembly body into a vacuum box, then pumping the vacuum degree in the vacuum box to 2mbar, and then placing the vacuum box under a pressure of 15 mbar; pouring the glue filling liquid from the bottom of the tool, wherein the flow rate of the glue filling liquid is 2-3g/s, the weight of the glue filling liquid is 4000g-5000g, the glue filling is finished until the upper surface of the tool is covered with a 1-3mm glue layer, and then the pressure is released to normal pressure; then continuously vacuumizing the vacuum box to 2mbar, keeping for 30min, and then decompressing to normal pressure;

curing and demolding: and transferring the assembly body to a vacuum box for primary curing, wherein the curing time is 10 hours, then demolding when the surface temperature of the assembly body is cooled to 40-50 ℃, transferring the stator to the vacuum box after demolding for secondary curing, wherein the curing time is 10 hours, and obtaining the magnetic suspension motor after the curing is finished.

2. The glue filling method for protecting the stator of the magnetic suspension motor as claimed in claim 1, wherein the first glue is bisphenol A epoxy resin, the second glue is modified anhydride, the viscosity of the glue filling liquid at 60 ℃ is 3433cps, and the viscosity of the glue filling liquid at 80 ℃ is 1433 cps.

3. The glue filling method for protecting the stator of the magnetic suspension motor, according to claim 1, is characterized in that the inner diameter of the static mixing pipe is 8.5mm, the number of spiral sections is 36, the metering cylinder is an 860-5SA type metering cylinder, and the stroke is 500 g.

4. The glue filling method for protecting the stator of the magnetic suspension motor, according to claim 1, is characterized in that in the curing and demolding process, the curing temperature of the first curing is 80 ℃; the curing temperature for the second curing was 140 ℃.

5. The glue filling method for protecting the stator of the magnetic suspension motor, as claimed in claim 1, wherein the weight of the glue filling liquid is 4500g during the glue filling process.

6. The glue filling method for protecting the stator of the magnetic suspension motor, according to claim 1, further comprising moving the stator which is subjected to the first curing and the stripping to a cooling area for cooling, and after the cooling is completed, simultaneously placing a plurality of stators into an oven for secondary curing.

7. The glue filling method for protecting the stator of the magnetic suspension motor, according to claim 1, characterized in that the density of the first glue in the glue filling liquid is 1.61 g/cc; the density of the second glue is 1.76g/cc, and the thermal conductivity of the potting glue is 0.8 w/m.k.

8. The glue filling method for protecting the stator of the magnetic suspension motor as claimed in claim 1, wherein in the process of pre-treating the tooling and the stator, the assembly body is preheated in an oven for 2 hours at a temperature of 110 ℃.

9. The glue filling method for protecting the stator of the magnetic suspension motor, according to claim 1, characterized in that the preheating temperature of the first glue and the second glue are both 85 ℃.

Technical Field

The invention relates to the technical field of stator glue filling, in particular to a glue filling method for protecting a stator of a magnetic suspension motor.

Background

The magnetic suspension motor, the stator and the runner are in non-contact operation. According to the acting force of a magnetic field, the magnetic field is divided into an attraction type and a repulsion type; according to the magnetic field coupling degree, the suspension force and driving force independent control type and the suspension force and driving force coupling control type are divided; the magnetic suspension linear motor is divided into a magnetic suspension rotating motor and a magnetic suspension linear motor according to the structures of a stator and a rotor. The magnetic suspension bearing is used for magnetic suspension trains, magnetic suspension bearings, magnetic suspension artificial heart blood pumps and other occasions.

The manufacturing difficulty of the stator of the magnetic suspension motor comes from the following aspects: 1. when the stator operates, the permanent magnet bears a great alternating force, including an attractive force or a repulsive force between the rotor and the stator, a motor thrust force or a braking force and the like; 2. the working environment in the machine table is filled with water vapor which has an erosion effect on the stator; 3. the stator must be thin enough to compress the installation height of the whole machine; 4. the air gap between the stator and the rotor is usually small, which means that it is difficult to arrange other mechanisms above the stator to protect the stator. 5. The use of the common glue-pouring packaging process is difficult to realize that the glue is bubble-free, and even a layer of complete glue film cannot be formed on the surface of the stator. In summary, there is an urgent need for a good glue filling method to improve the protection of the secondary of the permanent magnet linear motor.

Disclosure of Invention

In order to overcome at least part of defects in the prior art, the embodiment of the invention provides a glue filling method for protecting a stator of a magnetic suspension motor, which is simple in structure and convenient to use, and can form a glue layer on the surface of the stator to effectively protect the stator.

The invention relates to a glue filling method for protecting a stator of a magnetic suspension motor, which comprises the following steps:

glue treatment: providing first glue and second glue, respectively preheating the first glue and the second glue to 80-90 ℃, then adjusting the vacuum degree of a charging bucket for storing the first glue to 2mba, continuously stirring until no visible bubbles exist on the surface of the first glue, adjusting the vacuum degree of a charging bucket for storing the second glue to 5mba, and continuously stirring until no visible bubbles exist on the surface of the second glue;

tool and stator pretreatment: uniformly coating a release agent on the outer surface of a tool, cleaning the inner surface and the outer surface of a stator to be subjected to glue pouring, assembling the stator on the tool to form an assembly body, and then transferring the assembly body into an oven to preheat for 1-3 hours at 110 ℃;

mixing glue: the weight ratio of the raw materials is 1: 1, matching the first glue and the second glue after stirring, and then mixing the first glue and the second glue through a static mixing pipe to form a glue filling liquid;

and (3) glue pouring treatment: transferring the assembly body into a vacuum box, then pumping the vacuum degree in the vacuum box to 2mbar, and then placing the vacuum box under a pressure of 15 mbar; pouring the glue filling liquid from the bottom of the tool, wherein the flow rate of the glue filling liquid is 2-3g/s, the weight of the glue filling liquid is 4000g-5000g, the glue filling is finished until the upper surface of the tool is covered with a 1-3mm glue layer, and then the pressure is released to normal pressure; then continuously vacuumizing the vacuum box to 2mbar, keeping for 30min, and then decompressing to normal pressure;

curing and demolding: and transferring the assembly body to a vacuum box for primary curing, wherein the curing time is 10 hours, then demolding when the surface temperature of the assembly body is cooled to 40-50 ℃, transferring the stator to the vacuum box after demolding for secondary curing, wherein the curing time is 10 hours, and obtaining the magnetic suspension motor after the curing is finished.

Further, the first glue is bisphenol A epoxy resin, the second glue is modified anhydride, the viscosity of the potting liquid at 60 ℃ is 3433cps, and the viscosity of the potting liquid at 80 ℃ is 1433 cps.

Further, the inner diameter of the static mixing pipe is 8.5mm, the number of spiral sections is 36, the metering cylinder is an 860-5SA type metering cylinder, and the stroke is 500 g.

Further, in the curing and demolding process, the curing temperature of the first curing is 80 ℃; the curing temperature for the second curing was 140 ℃.

Further, in the process of the glue filling treatment, the weight of the glue filling liquid is 4500 g.

And further moving the stators subjected to the first solidification and the form removal to a cooling area for cooling, and simultaneously putting a plurality of stators into an oven for secondary solidification after cooling.

Further, the density of the first glue in the glue pouring liquid is 1.61 g/cc; the density of the second glue is 1.76g/cc, and the thermal conductivity of the potting glue is 0.8 w/m.k.

Further, in the process of pre-treating the tooling and the stator, the preheating time of the assembly body in the oven is 2 hours, and the preheating temperature is 110 ℃.

Further, the preheating temperature of the first glue and the preheating temperature of the second glue are both 85 ℃.

The invention has the advantages that:

1. the first glue solution and the second glue solution are placed in the material tank to be stirred, so that air bubbles in the first glue solution and the second glue solution can be effectively removed, the air bubbles in the glue solution are reduced, and the probability of air holes generated on a glue layer formed on the surface of the stator is effectively reduced;

2. the temperature difference between the assembly body and the glue filling liquid can be reduced by preheating the assembly body consisting of the stator and the tooling, so that the glue filling liquid can be better combined with the stator, the combination strength of the glue filling liquid and the stator is improved, and the probability that a glue layer formed on the surface of the stator is separated from the stator is reduced;

3. the glue layer formed on the surface of the stator can prevent water vapor from corroding the stator, so that the use stability and reliability of the stator are improved;

4. the stator rust-proof treatment can be simplified, the stator mounting precision can be maintained, the stator machining procedure can be simplified, the stator protection effect can be improved, the appearance of a finished product can be beautified, the machining time can be shortened, the cost can be reduced, and the production efficiency can be improved.

In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic step diagram of a glue pouring method for protecting a stator of a magnetic levitation motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a method for encapsulating a magnetic levitation motor stator in a preferred embodiment of the present invention includes steps of glue processing, tool and stator pre-processing, glue mixing, encapsulating, curing, and demolding. Compared with the prior art, the stator rust-proof treatment can be simplified, the stator mounting precision can be maintained, the stator processing procedure can be simplified, the stator protection effect can be improved, the finished product appearance can be beautified, the processing time can be shortened, the cost can be reduced, and the production efficiency can be improved

In the above embodiment, the glue treatment includes: providing first glue and second glue, respectively preheating the first glue and the second glue to 80-90 ℃, then adjusting the vacuum degree of a charging bucket for storing the first glue to 2mba, continuously stirring until no visible bubbles exist on the surface of the first glue, adjusting the vacuum degree of a charging bucket for storing the second glue to 5mba, and continuously stirring until no visible bubbles exist on the surface of the second glue; the first glue solution and the second glue solution are placed in the material tank to be stirred, so that air bubbles in the first glue solution and the second glue solution can be effectively removed, the air bubbles in the glue filling solution are reduced, and the probability of air holes generated on a glue layer formed on the surface of the stator is effectively reduced. The preheating temperature of the first glue and the preheating temperature of the second glue are both 85 ℃.

In the above embodiment, the tool and stator preprocessing includes: uniformly coating a release agent on the outer surface of a tool, cleaning the inner surface and the outer surface of a stator to be subjected to glue pouring, assembling the stator on the tool to form an assembly body, and then transferring the assembly body into an oven to preheat for 1-3 hours at 110 ℃; the assembly body that constitutes through to stator and frock preheats, can reduce the temperature difference of assembly body and encapsulating liquid to make encapsulating liquid can be better combine with the stator, improve the bonding strength of encapsulating liquid and stator, reduce the probability that the glue film that forms on the stator surface breaks away from the stator.

In the above embodiment, the glue mixing comprises: the weight ratio of the raw materials is 1: 1, matching the first glue and the second glue after stirring, and then mixing the first glue and the second glue through a static mixing pipe to form a glue filling liquid;

in the above embodiment, the glue filling process includes: transferring the assembly body into a vacuum box, then pumping the vacuum degree in the vacuum box to 2mbar, and then placing the vacuum box under a pressure of 15 mbar; pouring the glue filling liquid from the bottom of the tool, wherein the flow rate of the glue filling liquid is 2-3g/s, the weight of the glue filling liquid is 4000g-5000g, the glue filling is finished until the upper surface of the tool is covered with a 1-3mm glue layer, and then the pressure is released to normal pressure; then continuously vacuumizing the vacuum box to 2mbar, keeping for 30min, and then decompressing to normal pressure;

in the above embodiment, the curing and demolding comprises: and transferring the assembly body to a vacuum box for primary curing, wherein the curing time is 10 hours, then demolding when the surface temperature of the assembly body is cooled to 40-50 ℃, transferring the stator to the vacuum box after demolding for secondary curing, wherein the curing time is 10 hours, and obtaining the magnetic suspension motor after the curing is finished. Can prevent through the glue film that forms on the stator surface that steam from corroding the stator, improve the stability and the reliability of the use of stator.

In the above embodiment, in order to further improve the potting effect, a firm glue layer is formed on the surface of the stator, the first glue is bisphenol a type epoxy resin, the second glue is modified anhydride, the viscosity of the potting liquid formed by mixing the bisphenol a type epoxy resin and the modified anhydride is 3433cps at 60 ℃, and the viscosity of the potting liquid is 1433cps at 80 ℃.

In the above examples, in order to improve the effect of mixing the bisphenol A type epoxy resin and the modified acid anhydride, a static mixing tube having an inner diameter of 8.5mm and a number of helical pitch of 36 was used, and in order to more effectively control the mixing ratio of the bisphenol A type epoxy resin and the modified acid anhydride, an 860-5SA type metering cylinder was used as the metering cylinder, and the stroke was 500 g.

In the above embodiment, in order to improve the potting effect and form a glue layer with a suitable thickness on the surface of the stator, the weight of the potting liquid is 4500g during the potting process.

In the embodiment, the method further comprises the step of moving the stators subjected to the first solidification and the demolding to a cooling area for cooling, and after the cooling is completed, placing a plurality of stators into the oven at the same time for secondary solidification. The curing temperature of the first curing is 80 ℃; the curing temperature for the second curing was 140 ℃. Through the first curing and the second curing, the bonding strength between the stator upper rubber layer and the stator can be further enhanced.

In the above embodiment, the density of the first glue in the potting glue is 1.61 g/cc; the density of the second glue is 1.76g/cc, and the thermal conductivity of the potting glue is 0.8 w/m.k.

In the above embodiment, in order to further improve the bonding strength between the potting liquid and the stator, in the process of preprocessing the tooling and the stator, the preheating time of the assembly body in the oven is 2 hours, and the preheating temperature is 110 ℃.

The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.