阅读说明：本技术 一种变频器供电的电力机车变压器油泵电机定子绝缘方法 (Insulation method for motor stator of transformer oil pump of electric locomotive powered by frequency converter ) 是由 石伟劭 利新辉 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种变频器供电的电力机车变压器油泵电机定子绝缘方法,S1、选材：选取酚醛树脂20-30份、异辛酸钴1-3份、有机硅树脂15-25份、聚醚酰亚胺10-14份、炭黑9-11份、陶瓷空心微珠6-8份、稀释剂2-4份、增韧剂1-3份和纯净水余量,本发明涉及电机定子绝缘技术领域。该变频器供电的电力机车变压器油泵电机定子绝缘方法,通过选取酚醛树脂、有机硅树脂和炭黑,采用了高强度绝缘材料对电机电子进行绝缘处理,然后采用聚醚酰亚胺和陶瓷空心微珠,在材料具备绝缘性能的同时提供良好的隔热性能,配合增韧剂、异辛酸钴和稀释剂,增强各分子间的亲和力,有效的承受了电磁振动、机械振动的冲击和发热条件的老化,极大的提高了电机电子的绝缘性能。(The invention discloses an insulation method for a transformer oil pump motor stator of an electric locomotive supplied with power by a frequency converter, which comprises the following steps of S1: the invention relates to the technical field of motor stator insulation, and specifically relates to a composite material containing 20-30 parts of phenolic resin, 1-3 parts of cobalt iso-octoate, 15-25 parts of organic silicon resin, 10-14 parts of polyetherimide, 9-11 parts of carbon black, 6-8 parts of ceramic hollow microspheres, 2-4 parts of diluent, 1-3 parts of toughening agent and the balance of purified water. According to the insulation method for the motor stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter, phenolic resin, organic silicon resin and carbon black are selected, high-strength insulation materials are adopted to perform insulation treatment on motor electrons, polyetherimide and ceramic hollow microspheres are adopted, the materials have insulation performance and simultaneously provide good heat insulation performance, and a toughening agent, cobalt isooctanoate and a diluent are matched to enhance the affinity among molecules, so that the impact of electromagnetic vibration and mechanical vibration and the aging of heating conditions are effectively borne, and the insulation performance of the motor electrons is greatly improved.)

1. A method for insulating a stator of an oil pump motor of a transformer of an electric locomotive powered by a frequency converter is characterized by comprising the following steps: the method comprises the following steps:

s1, selecting materials: selecting 20-30 parts of phenolic resin, 1-3 parts of cobalt iso-octoate, 15-25 parts of organic silicon resin, 10-14 parts of polyetherimide, 9-11 parts of carbon black, 6-8 parts of ceramic hollow microspheres, 2-4 parts of diluent, 1-3 parts of toughening agent and the balance of purified water;

s2, material configuration: sequentially adding phenolic resin, organic silicon resin, polyetherimide, carbon black and ceramic hollow microspheres into a heating stirring pot filled with purified water, and fully stirring the materials at the temperature of 70-90 ℃ to prepare a mixed solution;

s3, forming of insulating varnish: sequentially adding cobalt iso-octoate, a diluent and a toughening agent into a heating stirring pot in S2, continuously stirring, controlling the temperature at 50-60 ℃, cooling, and then, insulating paint solution and storing in a sealed container;

s4, mounting and preheating: adding the prepared insulating paint into a paint container of a paint dipping furnace, then installing a motor stator on a mechanical claw of the paint dipping furnace, starting the mechanical claw to rotate, preheating the motor stator at the moment, keeping the temperature between 120 and 150 ℃, and preserving the heat for 1min +/-10 s;

s5, dropping paint: when the temperature in the paint dipping furnace in S3 is cooled to 50-70 ℃, dripping insulating paint solution to the coil part of the rotating motor stator to be painted through a paint dripping pipe of the paint dipping furnace, wherein the paint dripping time is 1.2min +/-10S;

s6, drying: and after finishing the paint dripping of the motor stator in the S4, heating the paint dipping furnace at the moment, keeping the temperature between 100 and 120 ℃, keeping the temperature for 3min +/-10S, performing ventilation treatment, and drying the paint dipped motor stator.

2. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: the raw materials comprise the following components: 20 parts of phenolic resin, 1 part of cobalt iso-octoate, 15 parts of organic silicon resin, 10 parts of polyetherimide, 9 parts of carbon black, 6 parts of ceramic hollow microspheres, 2 parts of diluent, 1 part of toughening agent and the balance of purified water.

3. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: the raw materials comprise the following components: 25 parts of phenolic resin, 2 parts of cobalt iso-octoate, 20 parts of organic silicon resin, 12 parts of polyetherimide, 10 parts of carbon black, 7 parts of ceramic hollow microspheres, 3 parts of diluent, 2 parts of toughening agent and the balance of purified water.

4. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: the raw materials comprise the following components: 30 parts of phenolic resin, 3 parts of cobalt iso-octoate, 25 parts of organic silicon resin, 14 parts of polyetherimide, 11 parts of carbon black, 8 parts of ceramic hollow microspheres, 4 parts of diluent, 3 parts of toughening agent and the balance of purified water.

5. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: the diluent is one or a mixture of two of banana oil or pentaerythritol triacrylate.

6. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: the toughening agent is one or a mixture of two of nano calcium carbonate or nano titanium dioxide.

7. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: and the stirring time in the S2 is 5-10min, and the rotating speed is controlled at 80-100 r/min.

8. The method for insulating the stator of the transformer oil pump motor of the electric locomotive powered by the frequency converter according to claim 1, wherein the method comprises the following steps: and the stirring time in the S3 is 2-3min, and the rotating speed is controlled at 50-60 r/min.

Technical Field

The invention relates to the technical field of motor stator insulation, in particular to a method for insulating a motor stator of an oil pump of a transformer of an electric locomotive powered by a frequency converter.

Background

The oil pump motor is a modified specific motor for driving an oil pump, the oil pump motor comprises a motor main body, a front end cover and an output transmission shaft, a stepped hole is formed in the front end cover, the output transmission is retracted into the front end cover and is a hollow shaft, the hole diameter of the shaft hole is matched with the outer diameter of an input transmission shaft of the oil pump, and a key groove is formed in a shaft head of the output transmission shaft. The oil pump is divided into high pressure and low pressure, namely, the high-pressure plunger oil pump drives the plunger to reciprocate up and down in the plunger sleeve by a cam shaft in the pump to generate high-pressure oil to be supplied to the oil injector. The cylindrical surface of the plunger is provided with a chute which is communicated with a straight groove, and the axial straight groove is communicated with the plunger top. Some plungers have no straight slot, and the oil hole drilled on the top of the plunger is communicated with the oblique slot to form a pump cavity. Two oil inlet holes are drilled on the upper part of the plunger sleeve, and when the plunger descends to the position that the two oil inlet holes are plugged out of the top surface of the plunger, low-pressure oil enters the pump cavity from the oil inlet holes.

Although the coil and other parts of the stator of the oil pump motor of the transformer of the electric locomotive powered by the frequency converter have certain insulating capacity when the stator is manufactured, the insulating paint material is simple, the insulating performance is poor, the stator is very weak and easy to damage, the insulating material needs to bear the impact of electromagnetic vibration and mechanical vibration and the aging of heating conditions, the service life of the insulating paint is greatly shortened, and the insulating paint is easy to break down and even fall off.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an insulation method for a transformer oil pump motor stator of an electric locomotive powered by a frequency converter, which solves the problems that the wrapped insulation paint material of the transformer oil pump motor stator of the electric locomotive powered by the frequency converter is simple, the insulation performance is poor, and the insulation paint falls off when the impact of electromagnetic vibration and mechanical vibration and the aging of heating conditions occur.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a stator insulation method for an oil pump motor of a transformer of an electric locomotive powered by a frequency converter comprises the following steps:

s1, selecting materials: selecting 20-30 parts of phenolic resin, 1-3 parts of cobalt iso-octoate, 15-25 parts of organic silicon resin, 10-14 parts of polyetherimide, 9-11 parts of carbon black, 6-8 parts of ceramic hollow microspheres, 2-4 parts of diluent, 1-3 parts of toughening agent and the balance of purified water;

s2, material configuration: sequentially adding phenolic resin, organic silicon resin, polyetherimide, carbon black and ceramic hollow microspheres into a heating stirring pot filled with purified water, and fully stirring the materials at the temperature of 70-90 ℃ to prepare a mixed solution;

s3, forming of insulating varnish: sequentially adding cobalt iso-octoate, a diluent and a toughening agent into a heating stirring pot in S2, continuously stirring, controlling the temperature at 50-60 ℃, cooling, and then, insulating paint solution and storing in a sealed container;

s4, mounting and preheating: adding the prepared insulating paint into a paint container of a paint dipping furnace, then installing a motor stator on a mechanical claw of the paint dipping furnace, starting the mechanical claw to rotate, preheating the motor stator at the moment, keeping the temperature between 120 and 150 ℃, and preserving the heat for 1min +/-10 s;

s5, dropping paint: when the temperature in the paint dipping furnace in S3 is cooled to 50-70 ℃, dripping insulating paint solution to the coil part of the rotating motor stator to be painted through a paint dripping pipe of the paint dipping furnace, wherein the paint dripping time is 1.2min +/-10S;

s6, drying: and after finishing the paint dripping of the motor stator in the S4, heating the paint dipping furnace at the moment, keeping the temperature between 100 and 120 ℃, keeping the temperature for 3min +/-10S, performing ventilation treatment, and drying the paint dipped motor stator.

Preferably, the raw materials comprise the following components: 20 parts of phenolic resin, 1 part of cobalt iso-octoate, 15 parts of organic silicon resin, 10 parts of polyetherimide, 9 parts of carbon black, 6 parts of ceramic hollow microspheres, 2 parts of diluent, 1 part of toughening agent and the balance of purified water.

Preferably, the raw materials comprise the following components: 25 parts of phenolic resin, 2 parts of cobalt iso-octoate, 20 parts of organic silicon resin, 12 parts of polyetherimide, 10 parts of carbon black, 7 parts of ceramic hollow microspheres, 3 parts of diluent, 2 parts of toughening agent and the balance of purified water.

Preferably, the raw materials comprise the following components: 30 parts of phenolic resin, 3 parts of cobalt iso-octoate, 25 parts of organic silicon resin, 14 parts of polyetherimide, 11 parts of carbon black, 8 parts of ceramic hollow microspheres, 4 parts of diluent, 3 parts of toughening agent and the balance of purified water.

Preferably, the diluent is one or a mixture of two of banana oil or pentaerythritol triacrylate.

Preferably, the toughening agent is one or a mixture of two of nano calcium carbonate and nano titanium dioxide.

Preferably, the stirring time in the S2 is 5-10min, and the rotating speed is controlled at 80-100 r/min.

Preferably, the stirring time in the S3 is 2-3min, and the rotating speed is controlled at 50-60 r/min.

(III) advantageous effects

The invention provides an insulation method for a transformer oil pump motor stator of an electric locomotive supplied with power by a frequency converter. Compared with the prior art, the method has the following beneficial effects:

(1) the insulation method of the stator of the oil pump motor of the electric locomotive transformer supplied with power by the frequency converter comprises the following steps of S1: selecting 20-30 parts of phenolic resin, 1-3 parts of cobalt iso-octoate, 15-25 parts of organic silicon resin, 10-14 parts of polyetherimide, 9-11 parts of carbon black, 6-8 parts of ceramic hollow microspheres, 2-4 parts of diluent, 1-3 parts of toughening agent and the balance of purified water; s2, material configuration: sequentially adding phenolic resin, organic silicon resin, polyetherimide, carbon black and ceramic hollow microspheres into a heating stirring pot filled with purified water, and fully stirring the materials at the temperature of 70-90 ℃ to prepare a mixed solution; s3, forming of insulating varnish: sequentially adding cobalt iso-octoate, a diluent and a toughening agent into a heating stirring pot in S2, continuously stirring, controlling the temperature at 50-60 ℃, cooling, and then, insulating paint solution and storing in a sealed container;

s4, mounting and preheating: adding the prepared insulating paint into a paint container of a paint dipping furnace, then installing a motor stator on a mechanical claw of the paint dipping furnace, starting the mechanical claw to rotate, preheating the motor stator at the moment, keeping the temperature between 120 and 150 ℃, and preserving the heat for 1min +/-10 s; s5, dropping paint: when the temperature in the paint dipping furnace in S3 is cooled to 50-70 ℃, dripping insulating paint solution to the coil part of the rotating motor stator to be painted through a paint dripping pipe of the paint dipping furnace, wherein the paint dripping time is 1.2min +/-10S; s6, drying: after finishing the paint dripping of the motor stator in the S4, heating the paint dipping furnace at the moment, keeping the temperature between 100 and 120 ℃, keeping the temperature for 3min +/-10S, carrying out ventilation treatment, drying the paint dipped motor stator, by selecting phenolic resin, organic silicon resin and carbon black, adopting high-strength insulating material to insulate the motor electrons, having high-frequency electric breakdown resistance and high-strength reticular molecules with high chemical stability, then adopting polyetherimide and ceramic hollow microspheres, the material has insulating property and simultaneously provides good heat-insulating property, and the affinity among molecules is enhanced by matching with a toughening agent, cobalt isooctanoate and a diluent, and the catalyst catalyzes the intermolecular rapid fusion, effectively bears the impact of electromagnetic vibration and mechanical vibration and the aging of heating conditions, greatly improves the insulating property of motor electronics, and prolongs the service life of the motor electronics.

Drawings

FIG. 1 is a statistical table of comparative experimental data according to the present invention.

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, the embodiment of the present invention provides three technical solutions: a stator insulation method for an oil pump motor of an electric locomotive transformer powered by a frequency converter specifically comprises the following embodiments: