CN111004558A

CN111004558A - Perfusion fluid for oil type capacitor and preparation method thereof

Info

Publication number: CN111004558A
Application number: CN201911088831.8A
Authority: CN
Inventors: 肖松
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-04-14

Abstract

The invention discloses a perfusion fluid for an oil type capacitor, which comprises epoxy resin, benzyl alcohol, talcum powder, pigment, a defoaming agent and an anti-settling agent, wherein the prepared perfusion fluid is a liquid mixture with stable components and all the components are completely mixed with each other; the liquid mixture is used as a liquid filling material in products for oil type capacitors in various applications and occasions, and has the following functions: filling, insulation, heat dissipation, sealing and corrosion resistance, etc., as well as other electrical and electronic components with the same effect, it is a group of compounds which are permanently present in liquid form in a fully sealed product.

Description

Perfusion fluid for oil type capacitor and preparation method thereof

Technical Field

The invention relates to the technical field of perfusion fluid for capacitors, in particular to perfusion fluid in a product for an oil type capacitor and a preparation method thereof.

Background

At present, the price of the capacitor in the market is continuously lowered, and meanwhile, the quality of products required by customers is higher and higher. Oil formula condenser product on the current market, its inside material of irritating exists two big extreme phenomena: (1) the liquid filling material in the product for the capacitor is relatively low in price, such as: polybutene, salad oil, wax, certain vegetable oil and the like, and the filling materials have large swelling and corrosion on the core of the product, easily cause low reliability of the service life of the product and low passing rate of a durability (aging) test; (2) some liquid filling materials in products for capacitors are relatively high in price, such as: silicon oil and the like have small swelling and corrosion on the core body of the product, so the product has good quality, high service life reliability and high passing rate of durability (aging) test, but the product has high price and is difficult to popularize and use.

Disclosure of Invention

The invention aims to provide the perfusion fluid for the oil type capacitor, which can prolong the service life of the capacitor, has low cost, good insulation and heat dissipation effects and meets the requirement of the durability test of the capacitor.

Another object of the present invention is to provide a method for preparing a perfusion fluid for an oil-type capacitor, which can be easily carried out.

The purpose of the invention is realized as follows: the perfusion fluid for the oil type capacitor is characterized by comprising the following components in percentage by weight: 15 to 35 percent of epoxy resin, 5 to 15 percent of benzyl alcohol, 50 to 70 percent of talcum powder, 0.08 to 0.2 percent of pigment, 0.002 to 0.01 percent of defoaming agent and 0.004 to 1.5 percent of anti-settling agent.

More specifically, the pigment may be a toner or a color paste.

Another object of the invention is achieved by: adding the following components in proper amount in sequence: epoxy resin, benzyl alcohol, talcum powder, pigment, defoaming agent and anti-settling agent, and uniformly stirring to obtain the required perfusion fluid.

The invention has the following beneficial effects:

(1) the perfusate for the oil type capacitor comprises epoxy resin, benzyl alcohol, talcum powder, pigment, a defoaming agent and an anti-settling agent, and the prepared perfusate is a liquid mixture with stable components and completely mixed components; the liquid mixture is used as a liquid filling material in products for oil type capacitors in various applications and occasions, and has the following functions: filling, insulation, heat dissipation, sealing and corrosion resistance, etc., as well as other electrical and electronic components with the same effect, it is a group of compounds which are permanently present in liquid form in a fully sealed product.

(2) The preparation method of the perfusion liquid for the oil type capacitor is simple and easy to operate and easy to implement, the color of the perfusion material can be used as the main color when the perfusion liquid is prepared for use, the favorite color is the favorite color, and the depth of the color is customized.

(3) The materials of all the components have high universality, are common materials in the market, are easy to purchase, and have no expensive consumables; the process has strong universality; whether the blending is self-use or the blended finished product is sold, the blending equipment is simple and single, and the operation can be completed only by adding and stirring the materials one by one.

(4) The perfusate prepared by the invention is tested and experimented in various aspects, and provides powerful technical support, quality guarantee and experimental data support:

(I) evaporation rate measurement: sampling 100g of the dried oven, keeping the temperature constant for 110 ℃/3h, and measuring the weight before and after the drying, wherein the evaporation rate is less than or equal to 0.05 percent.

(II) withstand voltage strength test: keeping the temperature in the oven at 110 ℃/4h, immediately cooling to 60 ℃ after the vacuum degree is less than or equal to-0.1 Mpa and 120 ℃/8h, pouring into a special test electrode oil cup, and applying voltage of 30KVAC to the two electrodes by using an alternating voltage tester for 60S without breakdown and flicker.

The specific implementation mode is as follows:

the present invention is further illustrated by the following specific examples.

The perfusion liquid for the oil type capacitor comprises the following components in percentage by weight: 15 to 35 percent of epoxy resin, 5 to 15 percent of benzyl alcohol, 50 to 70 percent of talcum powder, 0.08 to 0.2 percent of pigment, 0.002 to 0.01 percent of defoaming agent and 0.004 to 1.5 percent of anti-settling agent; wherein the pigment is toner or color paste.

The preparation method of the perfusion liquid for the oil type capacitor comprises the following steps of sequentially adding the following components in proper amount: epoxy resin, benzyl alcohol, talcum powder, pigment, defoaming agent and anti-settling agent, and uniformly stirring to obtain the required perfusion fluid.

Example 1: the perfusion liquid for the oil type capacitor comprises the following components in percentage by weight: 30% of epoxy resin, 12% of benzyl alcohol, 56.8% of talcum powder, 0.1% of pigment, 0.006% of defoaming agent and 1.094% of anti-settling agent; wherein the pigment is toner or color paste.

Example 2: the perfusion liquid for the oil type capacitor comprises the following components in percentage by weight: 20% of epoxy resin, 10% of benzyl alcohol, 68.75% of talcum powder, 0.15% of pigment, 0.003% of defoaming agent and 1.097% of anti-settling agent; wherein the pigment is toner or color paste.

The above are only two examples, and any use of the above components and their corresponding mass percentage ranges are all within the scope of the present invention.

The following summary is made for the excellent and complementary advantages and disadvantages of the above-mentioned component formulas;

(1) in the past, epoxy resins and their fillers have been used in dry (i.e., cured, non-permanent liquid) capacitors in the prior art, diluted with reactive diluents and used in combination with other fillers to facilitate curing and to reduce shrinkage, porosity and cracking of the cured product. The reactive diluent contains active ingredients, chloride ions and chlorides, and thus corrodes the core.

The invention innovatively adds special materials in the formula, so that the epoxy resin and the filler thereof can be used on oil type capacitor products and used as internal filling materials: benzyl alcohol, a non-reactive diluent, acts to reduce viscosity and improve resin permeability. Does not contain active ingredients, chloride ions and chloride, and does not corrode the core body.

(2) The formula has the following matching of wettability and intersolubility: the epoxy resin is liquid, the benzyl alcohol is liquid, the talcum powder is fine sand-free powder, the toner is powder, the defoaming agent is liquid, the anti-settling agent is liquid, the powder is high in dispersibility and adsorbability, mixing is easy to achieve, homogenizing distribution is good, the homogenizing mixing process is efficient and rapid, and the whole powder of the formula is soaked in the liquid. The formula has good overall wettability and mutual solubility of liquid and powder, and forms a new liquid mixture with stable components and completely mixed components.

(3) The melting point (the freezing point is low) of the benzyl alcohol is-15.3 ℃, the lowest allowable operation temperature of the capacitor (namely the lowest allowable temperature of the outer surface of the shell of the capacitor at the moment of putting in use) is allowed to reach-40 ℃, and the talcum powder is researched and developed for use, has high melting point, and is matched with epoxy resin and talcum powder in a high-low mode, so that the advantages and disadvantages are complementary to make up for the defects.

(4) The benzyl alcohol is selected to be used on a fully-sealed oil type capacitor product, and is matched with the epoxy resin and the talcum powder for use, so that the characteristics of large structural strength, good sealing performance, high compactness, strong bonding degree, good permeation resistance, good weather resistance, chemical inertness, good covering power, strong adsorption power and excellent unique oxidation resistance of the benzyl alcohol and the epoxy resin are fully exerted. Good physical and chemical properties complement each other to complement the disadvantages.

(5) The materials of all the components have high universality, are common materials in the market, are easy to purchase, and have no expensive consumables; the process has strong universality; whether the blending is self-use or the blended finished product is sold, the blending equipment is simple and single, and the operation can be completed only by adding and stirring the materials one by one.

(6) Through the research and development design of novel material of irritating, pour into the product of novel material of irritating preparation, this condenser is when normal use or life-test with higher speed, because insulating properties is high, oxidation resistance is strong, heat dispersion is superior, corrosion resistance is good, core metallized film takes place self-healing or electrochemical corrosion and only has a little coating region loss, its effective area reduces a little relatively, the volume decay rate is also little to guarantee the reliable performance of normal use of this type of condenser, make the condenser performance better, the product is safer, reliable.

The research and development of the project are based on the principles of technical innovation and quality improvement. The novel liquid filling material in the product for the oil type capacitor and other electronic and electrical components with the same function is added, the service life reliability of the product can be improved, the material performance verification meets the international or national relevant technical standard requirements of the capacitor, and the project research result can be directly converted into production.

Claims

1. The perfusion fluid for the oil type capacitor is characterized by comprising the following components in percentage by weight: 15 to 35 percent of epoxy resin, 5 to 15 percent of benzyl alcohol, 50 to 70 percent of talcum powder, 0.08 to 0.2 percent of pigment, 0.002 to 0.01 percent of defoaming agent and 0.004 to 1.5 percent of anti-settling agent.

2. The pouring liquid for oil capacitors as claimed in claim 1, wherein the pigment is a toner or a color paste.

3. A method for preparing a perfusion fluid for an oil capacitor as claimed in claim 1, wherein the following appropriate amounts of components are added sequentially: epoxy resin, benzyl alcohol, talcum powder, pigment, defoaming agent and anti-settling agent, and uniformly stirring to obtain the required perfusion fluid.