CN119662350A

CN119662350A - Aero-engine runner cleaning agent and use method thereof

Info

Publication number: CN119662350A
Application number: CN202411841204.8A
Authority: CN
Inventors: 李咏; 王峰; 陈满; 卢鉴; 王军; 陈杰; 郑衎; 叶志远; 张东晋川; 张跃毅
Original assignee: Chengdu Hangli Equipment Technology Co ltd
Current assignee: Chengdu Hangli Equipment Technology Co ltd
Priority date: 2024-12-13
Filing date: 2024-12-13
Publication date: 2025-03-21

Abstract

The invention discloses an aeroengine runner cleaning agent and a use method thereof, wherein the raw materials comprise, by weight, 65-80 parts of water, 7-9 parts of sodium metasilicate, 5-8 parts of a compound surfactant, 1-3 parts of triethanolamine oleate and 7-15 parts of saturated isoparaffin. The use method of the cleaning agent comprises the steps that the engine is not detached from an airplane, the cleaning agent is atomized into 50-100-micrometer water particles by adopting an injection method under the cold running or slow running state of the engine, the water particles are injected into an air flow channel through an engine cleaning nozzle, and deposits such as carbon deposit, salt stain, dust and dirt on the air flow channel of the engine are effectively cleaned on line. The invention has the characteristics of no damage, rapidness and no corrosion to the base material, can clean the sediment such as salting, oil dirt, carbon deposition and the like on the engine runner on line, and has less consumption of engine cleaning agent and high cleaning efficiency compared with the traditional engine runner cleaning.

Description

Aero-engine runner cleaning agent and use method thereof

Technical Field

The invention relates to the technical field of cleaning of air flow channels of aeroengines, in particular to a cleaning agent for a flow channel of an aeroengine and a use method thereof.

Background

In the use process of the aeroengine, due to the influence of the use environment and the engine performance change, the surface of an air flow channel (comprising a compressor blade, a turbine blade and a combustion chamber fuel nozzle) can generate deposits such as salt, oil dirt, carbon deposition and the like, so that the surface of the air flow channel is rough, the geometric shape is changed, the engine performance is attenuated, and the service life of the engine is shortened.

The existing cleaning modes are as follows:

1. The engine is detached from the aircraft, the engine is decomposed into single parts or unit bodies, and the modes of ultrasonic breaking, soaking and cleaning, alkali explosion and carbon deposit removal, gasoline or kerosene flushing and the like are adopted, so that the cleaning process is complex, the cleaning time is long (generally, the time is at least 5 working days), a large amount of cleaning agents are needed, and the service time of the engine is shortened seriously.

2. In the cold running or slow running state of engine, the detergent is sprayed onto the airflow channel or vane to clean deposit. The cleaning mode requires that the cleaning agent has low foamability and strong permeability, can remove refractory sediments such as carbon deposition, salting and dirt, can rapidly remove oil stains, has low consumption, is convenient to clean, and has no corrosion to various material compositions and special coatings of an engine airflow channel.

However, if gasoline, kerosene and pure organic solvent are adopted for cleaning wings, stubborn deposits on an engine airflow channel are not easy to remove, cleaning liquid is easy to volatilize, accidents such as ignition and explosion are easy to cause when the engine is in a cold running or slow running state, and strong alkaline or strong acid water-based cleaning agent is adopted for cleaning, corrosion is easy to occur on parts on a runner, a large amount of cleaning liquid or water is required for cleaning after cleaning, and meanwhile, cleaning residues have a pollution effect on the environment.

Disclosure of Invention

The invention aims to provide an aeroengine runner cleaning agent and a use method thereof, which are used for solving the technical problems that the cleaning agent in the prior art is insufficient in permeability and high in foaminess, and can not be used for safely removing deposits on an engine runner on line.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The invention provides an aeroengine runner cleaning agent which comprises the following raw materials, by weight, 65-80 parts of water, 7-9 parts of sodium metasilicate, 5-8 parts of a compound surfactant, 1-3 parts of triethanolamine oleate and 7-15 parts of saturated isoparaffin.

Further, the composite surfactant is formed by compounding a nonionic surfactant and an anionic surfactant, and the compounding ratio of the nonionic surfactant to the anionic surfactant is (10:1.4-3.5). The compound surfactant has the advantages of best effect, best cleaning agent effect, small dosage, high cleaning efficiency and no sediment.

Further, the nonionic surfactant is compounded by at least two of alkylphenol ethoxylates, aliphatic polyoxyethylene ethers and lauric acid diethanolamide.

Further, the alkylphenol ethoxylates are emulsifiers TX-10 or OP-10, the aliphatic polyoxyethylene ethers are emulsifiers AEO-9, T-80 or T-60, and the lauric acid diethanolamide is a cleaning agent 6501.

Further, the anionic surfactant is an alcohol ether carboxylate.

Further, the carbon chain content of the saturated isoparaffin is 8-12, and the boiling point is 180-200 ℃.

Further, the saturated isoparaffin is one of T65, 706 and FDS 166.

The invention also provides a use method of the aircraft engine runner cleaning agent, which comprises the following steps:

S1, placing a cleaning medium in a cleaning device, and heating to 80-100 ℃;

S2, the cleaning device is connected with an engine through a pipeline and a nozzle;

S3, atomizing the cleaning medium into particles with the diameter of 50-100 microns by the cleaning device under the pressure of less than or equal to 0.4MPa in the cold running or slow running state of the engine, spraying the particles to a target area to be cleaned within 0.5-1 min, and infiltrating the target area for 1-3 min, wherein the process is one cycle, and the usage amount of the cleaning medium in a single cycle is less than or equal to 20L;

S4, cleaning the cleaning agent for 5-10 cycles;

S5, cleaning the target area by using a cleaning agent (distilled water, soft water, pure water and mixed solution containing an antirust additive) for 4-8 cycles until the flowing cleaning agent is clean and the PH value is 7-8;

s6, detecting whether the engine runner is abnormal or not through hole detection, and cleaning the target area cleanly and without cleaning agent residues.

Based on the technical scheme, the embodiment of the invention at least has the following technical effects:

(1) Excellent cleaning performance and low foaming property. Firstly, a nonionic surfactant such as polyoxyethylene ether and lauric acid diethanolamide with balanced hydrophobic groups and hydrophilic groups is adopted for compounding, so that the surface tension of the cleaning agent can be effectively reduced, the cleaning agent can be rapidly diffused to an interface, and the hard water resistance and the cleaning effect of the cleaning agent can be improved. And secondly, alcohol ether carboxylate with the characteristics of both anionic surfactant and nonionic surfactant is adopted as the anionic surfactant, so that the cloud point of the nonionic surfactant can be effectively eliminated or improved in cooperation with the action of the nonionic surfactant, the solubility, detergency, wettability, emulsifying property, dispersibility and calcium soap dispersibility of the cleaning agent are improved, the foamability in the cleaning process of the cleaning agent can be reduced, the use of cleaning water is reduced under the condition of ensuring the cleaning effect, and the online cleaning of a runner is facilitated. And thirdly, the cleaning agent is compounded by nonionic surfactant and anionic surfactant, and when the compounding ratio is (10:1.4-3.5), the cleaning efficiency is high, the oil-water balance is realized, and the phenomena of layering of the cleaning agent and possibly uneven cleanliness are avoided.

(2) Saturated isoparaffin (carbon chain content is 8-12, boiling point is 180-200 ℃), so that the dissolution and cleaning of oil stains by online cleaning are improved, the solubility of a surfactant is increased, the dissolution of residual oil, gas and refractory sediment in a flow channel is improved, and the cleaning effect is improved.

(3) The plurality of hybrid atoms O and N in the triethanolamine oleate can chelate with Ca ²⁺、Mg²⁺ in an aqueous solution to soften water, and can chelate with heavy metal ions in sediment to enhance the detergency.

(4) The sodium metasilicate is dissolved in water and does not have vitrification phenomenon, the PH value of the cleaning agent can be adjusted, the cleaning agent is compounded with the components, the effects of wetting, emulsifying and saponifying greasy dirt of the cleaning agent are enhanced, meanwhile, the redeposition of dirt is prevented, and the cleaning efficiency is improved.

(5) The invention does not use strong acid and strong alkali, does not contain sulfur and phosphorus substances, is a water-based cleaning agent taking water as a main body, is environment-friendly, can reduce the consumption of cleaning solution and is beneficial to on-line cleaning of a runner, meanwhile, the invention solves the problems of easy volatilization and ignition of low-boiling organic solvent at high temperature, residue in the cleaning agent and the like by utilizing the characteristics of high boiling point of saturated isoparaffin, no additive and less residue in the cleaning agent, can meet the requirements of safe oil removal and carbon deposit removal, improves the cleaning effect and solves the problems of safety and environment protection.

(6) The invention adopts the spray of the cleaning agent atomized into particles to directionally clean the target area to be cleaned, and has the advantages of less consumption of the cleaning agent and high cleaning efficiency.

(7) According to the invention, a cleaning agent with excellent cleaning performance and less foam is obtained through a compound system of sodium metasilicate, a compound surfactant, triethanolamine oleate and saturated isoparaffin, and meanwhile, the cleaning effect is optimal when the non-ionic surfactant period and the compound proportion of the anionic surfactant are 10:1.4-3.5, 7-9 parts of sodium metasilicate, 1-3 parts of triethanolamine oleate and 7-15 parts of saturated isoparaffin, and the components are indispensable.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a graph showing the comparison of the results of the hole detection before and after cleaning in example 3 of the present invention;

FIG. 2 is a plot of anionic surfactant ratio versus cleaning performance ratio for the complex surfactant of example 14 of the present invention.

Detailed Description

Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.

As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.

Example 1:

the raw materials comprise 8 parts by weight of composite surfactant, 9 parts by weight of sodium metasilicate, 3 parts by weight of oleic acid amine triacetate, 15 parts by weight of saturated isoparaffin and 65 parts by weight of water, and the cleaning agent is prepared.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:3.3.

5 Parts by weight of alkylphenol ethoxylate TX-10, 1 part by weight of lauric acid diethanolamide 6501 and 2 parts by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning mode of this example is:

Placing cleaning medium in a cleaning device, heating to 95 deg.C, connecting the cleaning device with engine by means of pipeline and nozzle, under the condition of cold running or slow running of engine, atomizing the cleaning medium into 80 micrometer granules by means of 0.2MPa pressure, spraying the granules into target area to be cleaned in 1min, soaking the target area for 3min, and adopting cleaning agent to clean 5 cycles, then adopting cleaning agent to clean 8 cycles, and making hole detection to check that in the blade in the flow channel of engine, there is no abnormality of cleaning agent, no residue of cleaning agent and pH value of outflow cleaning agent is 7.2.

Example 2:

The raw materials of the cleaning agent comprise 5 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 3 parts by weight of oleic acid amine triacetate, 14 parts by weight of saturated isoparaffin and 70 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:2.5.

2 Parts by weight of nonionic surfactant alkylphenol ethoxylate TX-10, 1 part by weight of aliphatic polyoxyethylene ether AEO-9, 1 part by weight of lauric acid diethanolamide 6501 and 1 part by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating to 90 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into 90-micrometer particles by the cleaning device under the pressure of 0.3MPa in a cold running or slow running state of the engine, spraying the 90-micrometer particles to a target area to be cleaned within 0.8min, infiltrating the target area for 2min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning 10 cycles by using a cleaning agent and then cleaning 5 cycles by using a cleaning agent, and checking whether the inside of blades in a runner of the engine is abnormal or not by hole detection, the cleaning agent is free from residues, and the PH value of the flowing cleaning agent is 7.8.

Example 3:

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:3.3.

2 Parts by weight of nonionic surfactant alkylphenol ethoxylate TX-10, 2 parts by weight of aliphatic polyoxyethylene ether AEO-9, 2 parts by weight of lauric acid diethanolamide 6501 and 2 parts by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into 90-micrometer particles by the cleaning device under the pressure of 0.4MPa in a cold running or slow running state of the engine, spraying the 90-micrometer particles to a target area to be cleaned within 0.5min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning the 7 cycles by using a cleaning agent, cleaning the 4 cycles by using the cleaning agent, and checking whether the inside of blades in a runner of the engine is abnormal or not by hole detection, the cleaning agent is not remained, and the PH value of the flowing cleaning agent is 7.4.

Example 4:

the raw materials of the cleaning agent comprise 5 parts by weight of composite surfactant, 7 parts by weight of sodium metasilicate, 1 part by weight of oleic acid amine triacetate, 7 parts by weight of saturated isoparaffin and 80 parts by weight of water, and are prepared into the cleaning agent.

2 Parts by weight of a nonionic surfactant alkylphenol ethoxylate OP-10, 1 part by weight of an aliphatic polyoxyethylene ether T-60, 1 part by weight of lauric acid diethanolamide 6501, and 1 part by weight of an anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 85 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into 60-micrometer particles by the cleaning device under the pressure of 0.4MPa in a cold running or slow running state of the engine, spraying the 60-micrometer particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the cleaning medium consumption of each cycle is less than or equal to 20L, cleaning the engine by adopting a cleaning agent for 8 cycles, cleaning by adopting a cleaning agent for 4 cycles, and detecting whether the inside of blades in a runner of the engine is abnormal or not by pore detection, the cleaning agent is not remained, and the PH value of the flowing cleaning agent is 7.2.

Example 5:

The raw materials of the cleaning agent comprise 7 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 10 parts by weight of saturated isoparaffin and 73 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:1.7.

3 Parts by weight of aliphatic polyoxyethylene ether AEO-9 serving as a nonionic surfactant, 3 parts by weight of diethanolamide laurate 6501 and 1 part by weight of an anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was 706.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating to 90 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into 50-micrometer particles by the cleaning device under the pressure of 0.3MPa in a cold running or slow running state of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning 10 cycles by using a cleaning agent and then cleaning 4 cycles by using a cleaning agent, and checking whether the inside of blades in a runner of the engine is abnormal or not by hole detection, the cleaning agent is not remained, and the PH value of the flowing cleaning agent is 7.6.

Example 6:

The raw materials of the cleaning agent comprise 6 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 8 parts by weight of saturated isoparaffin and 76 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:2.

2 Parts by weight of the nonionic surfactant alkylphenol ethoxylate OP-10, 2 parts by weight of the aliphatic polyoxyethylene ether T-60, 1 part by weight of lauric acid diethanolamide 6501 and 1 part by weight of the anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating to 100 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into 60-micrometer particles by the cleaning device under the pressure of 0.4MPa in a cold running or slow running state of the engine, spraying the 60-micrometer particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning 7 cycles by using a cleaning agent and then cleaning 5 cycles by using a cleaning agent, and checking whether the inside of blades in a runner of the engine is abnormal or not by hole detection, the cleaning agent is not remained, and the PH value of the flowing cleaning agent is 7.8.

Example 7:

The raw materials of the cleaning agent comprise 5 parts by weight of composite surfactant, 7 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 11 parts by weight of saturated isoparaffin and 75 parts by weight of water, and are prepared into the cleaning agent.

2 Parts by weight of nonionic surfactant alkylphenol ethoxylate TX-10, 1 part by weight of aliphatic polyoxyethylene ether T-80, 1 part by weight of lauric acid diethanolamide 6501 and 1 part by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating to 90 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning for 6 cycles by adopting a cleaning agent, cleaning for 4 cycles by adopting the cleaning agent, and detecting no abnormality in blades in a runner of the engine by hole detection, no cleaning agent residue and the PH value of the outflow cleaning agent is 7.5.

Example 8:

The raw materials comprise 8 parts by weight of composite surfactant, 7 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 13 parts by weight of saturated isoparaffin and 70 parts by weight of water, and the cleaning agent is prepared.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:1.4.

2 Parts by weight of nonionic surfactant alkylphenol ethoxylate TX-10, 2 parts by weight of aliphatic polyoxyethylene ether AEO-9, 1 part by weight of aliphatic polyoxyethylene ether T-60, 2 parts by weight of lauric acid diethanolamide 6501 and 1 part by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating to 85 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning by adopting a cleaning agent for 8 cycles, cleaning by adopting a cleaning agent for 5 cycles, and checking whether the inside of blades in a runner of the engine is abnormal, no cleaning agent residue exists in a hole detection mode, and the PH value of the flowing cleaning agent is 7.3.

Example 9:

The raw materials of the cleaning agent comprise 6 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 12 parts by weight of saturated isoparaffin and 73 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:5.

1 Part by weight of nonionic surfactant alkylphenol ethoxylate TX-10, 2 parts by weight of aliphatic polyoxyethylene ether AEO-9, 1 part by weight of lauric acid diethanolamide 6501 and 2 parts by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 85 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 2min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning the blades in a runner of the engine by adopting a cleaning agent for 8 cycles, cleaning the blades by adopting a cleaning agent for 8 cycles, and detecting whether the blades in the runner of the engine have abnormality or not by adopting a hole detection method, wherein the PH value of the cleaning agent flowing out is 7.3.

Example 10:

The raw materials of the cleaning agent comprise 7 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 15 parts by weight of saturated isoparaffin and 68 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:4.

3 Parts by weight of the nonionic surfactant alkylphenol ethoxylate OP-10, 1 part by weight of the aliphatic polyoxyethylene ether T-80, 1 part by weight of lauric acid diethanolamide 6501 and 2 parts by weight of the anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was T65.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into 100-micrometer particles by the cleaning device under the pressure of 0.3MPa in a cold running or slow running state of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning 5 cycles by adopting a cleaning agent, and detecting no abnormality in blades in a runner of the engine by hole detection, no cleaning agent residue and the PH value of the outflow cleaning agent is 7.7.

Example 11:

The raw materials comprise 8 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 11 parts by weight of saturated isoparaffin and 73 parts by weight of water, and the cleaning agent is prepared.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate, aliphatic polyoxyethylene ether and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:10.

2 Parts by weight of nonionic surfactant alkylphenol ethoxylate TX-10, 1 part by weight of aliphatic polyoxyethylene ether AEO-9, 1 part by weight of lauric acid diethanolamide 6501 and 4 parts by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning the target area for 8 cycles by adopting a cleaning agent, and detecting partial blade parts in a runner of the engine by hole detection, wherein the partial blade parts have point-shaped sediments, the cleaning agent is free from residues, and the PH value of the flowing-out cleaning agent is 7.2.

Example 12:

The raw materials of the cleaning agent comprise 5 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 11 parts by weight of saturated isoparaffin and 74 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:6.7.

2 Parts by weight of alkylphenol ethoxylate TX-10, 1 part by weight of lauric acid diethanolamide 6501 and 2 parts by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning the target area for 8 cycles by adopting a cleaning agent, and detecting partial blade parts in a runner of the engine by hole detection, wherein the partial blade parts have point-shaped sediments, the cleaning agent is free from residues, and the PH value of the flowing-out cleaning agent is 7.4.

Example 13:

The raw materials of the cleaning agent comprise 7 parts by weight of composite surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 11 parts by weight of saturated isoparaffin and 72 parts by weight of water, and are prepared into the cleaning agent.

The composite surfactant is formed by compounding a nonionic surfactant (alkylphenol ethoxylate and lauric acid diethanolamide) and an anionic surfactant (alcohol ether carboxylate), wherein the compounding ratio of the nonionic surfactant to the anionic surfactant is 10:7.5.

3 Parts by weight of alkylphenol ethoxylate TX-10, 1 part by weight of lauric acid diethanolamide 6501 and 3 parts by weight of anionic surfactant (alcohol ether carboxylate).

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning the target area for 8 cycles by adopting a cleaning agent, and detecting partial blade parts in a runner of the engine by hole detection, wherein the partial blade parts have point-shaped sediments, the cleaning agent is free from residues, and the PH value of the flowing-out cleaning agent is 7.6.

Example 14:

The raw materials comprise, by weight, 100 parts of sodium metasilicate, 3 parts of triethanolamine oleate, 15 parts of saturated isoparaffin FDS166, 3-6 parts of TX-10, 1 part of lauric acid diethanolamine 6501, 0.5-2 parts of alcohol ether carboxylate and the balance of water.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the cleaning medium consumption of each cycle is less than or equal to 20L, cleaning the target area for 8 cycles by adopting a cleaning agent, cleaning the target area for 8 cycles by adopting the cleaning agent, detecting the partial blade part in a runner of the engine through hole detection, wherein the partial blade part has point-shaped sediment, no cleaning agent residue exists, and the PH value of the flowing cleaning agent is 7.4-7.8.

Example 15:

The raw materials comprise, by weight, 100 parts of sodium metasilicate, 0-4 parts of triethanolamine oleate, 12 parts of saturated isoparaffin FDS166, 3 parts of TX-10, 1 part of lauric acid diethanolamine 6501, 2 parts of alcohol ether carboxylate and the balance water.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the cleaning medium consumption of each cycle is less than or equal to 20L, cleaning the target area for 8 cycles by adopting a cleaning agent, cleaning the target area for 8 cycles by adopting the cleaning agent, detecting the partial blade part in a runner of the engine through hole detection, wherein the partial blade part has point-shaped sediment, no cleaning agent residue exists, and the PH value of the flowing cleaning agent is 7.0-8.2.

Comparative example 1

The cleaning agent is prepared from 6 parts by weight of nonionic surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 11 parts by weight of saturated isoparaffin and 73 parts by weight of water.

3 Parts by weight of nonionic surfactant alkylphenol ethoxylate TX-10 and 3 parts by weight of lauric acid diethanolamide 6501.

The saturated isoparaffin was FDS166.

The cleaning method comprises the steps of placing a cleaning medium in a cleaning device, heating the cleaning medium to 80 ℃, connecting the cleaning device with an engine through a pipeline and a nozzle, atomizing the cleaning medium into particles with the diameter of 80 microns by the cleaning device under the condition of cold running or slow running of the engine, spraying the particles to a target area to be cleaned within 1min, infiltrating the target area for 3min, wherein the cleaning process is one cycle, the consumption of the cleaning medium in each cycle is less than or equal to 20L, cleaning the target area for 8 cycles by adopting a cleaning agent, and detecting partial blade local punctiform sediment in a runner of the engine by hole detection, wherein no cleaning agent residue exists, and the PH value of the flowing-out cleaning agent is 7.5.

Comparative example 2

The cleaning agent is prepared from 6 parts by weight of anionic surfactant, 8 parts by weight of sodium metasilicate, 2 parts by weight of oleic acid amine triacetate, 11 parts by weight of saturated isoparaffin and 73 parts by weight of water.

The saturated isoparaffin was FDS166.

TABLE 1

Experimental example 1

The engine runners were cleaned using the cleaning solvents and cleaning methods prepared in examples 1 to 13 and comparative examples 1 to 2, and the test results of the cleaning time, the amount of the cleaning agent, the cleaning effect, the PH after cleaning, etc. are shown in table 2:

TABLE 2

As is clear from Table 1, the cleaning solvents prepared in examples 1 to 9 of the present invention have good cleaning effect on the engine airflow passage portion of the aeroengine, the cleaning time is shortened to 1.5 hours, examples 11 to 13 and comparative examples 1 to 2. After cleaning, spot-like deposits are detected locally by hole detection, and the cleaning agent of example 10 and comparative example 1 is observed to have large foam in the cleaning device.

Experimental example 2

Cleaning tests were carried out using the cleaning solvents prepared in examples 1-13 and comparative examples 1-2 as required by GJB2841A-2021 "aircraft Engine gas passage cleaning agent Specification", see Table 3:

TABLE 3 Table 3

As can be seen from Table 2, when the proportion of the nonionic surfactant to the composite surfactant is 10:1.4-3.5, the cleaning efficiency meets the requirement of more than or equal to 85% in GJB2841A-2021 standard.

Experimental example 3:

cleaning test was performed on example 14 formulation as required by GJB2841A-2021 "aircraft Engine gas passage cleaning agent Specification", see Table 4:

TABLE 4 Table 4

As can be seen from Table 4, when the proportion of the nonionic surfactant to the composite surfactant is 10:1.4-3.5, the cleaning efficiency meets the requirement of more than or equal to 85% in GJB2841A-2021 standard.

Experimental example 4:

Cleaning test was performed on example 15 formulation as required by GJB2841A-2021 "aircraft Engine gas passage cleaning agent Specification", see Table 5:

TABLE 5

It can be seen from table 5 that the cleaning efficiency was reduced when the sodium metasilicate content was <7, >9 and the oleic acid triethanolamine content was <1, >3, and the hard water resistance and accelerated storage stability performance were layered when the oleic acid triethanolamine content was 0.

Experimental example 6:

The cleaning solvents prepared in examples 1-13 and comparative examples 1-2 were used to perform full immersion corrosion testing as required by GJB2841A-2021, aircraft engine gas passage cleaning agent Specification 4.5.8, see Table 6:

TABLE 6

The total immersion corrosion changes to the metal materials of examples 1 to 13 were smaller than those of the comparative examples, and the examples and comparative examples passed the total immersion corrosion test.

Finally, it should be noted that:

The embodiments are only used to illustrate the technical scheme of the present invention, but not to limit the technical scheme, and although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical scheme described in the foregoing embodiments may be modified or some or all technical features may be equivalently replaced, and the modification or replacement does not deviate the essence of the corresponding technical scheme from the scope of the technical scheme of the embodiments of the present invention.

Claims

1. An aircraft engine flow channel cleaning agent, characterized in that its raw materials include the following components by weight: 65-80 parts of water, 7-9 parts of sodium metasilicate, 5-8 parts of composite surfactant, 1-3 parts of triethanolamine oleate, and 7-15 parts of saturated isomeric alkanes.

2. The aeroengine flow channel cleaning agent according to claim 1, characterized in that the composite surfactant is compounded by a nonionic surfactant and an anionic surfactant in a weight ratio of 10:1.4 to 3.5.

3. The aircraft engine flow channel cleaning agent according to claim 2, characterized in that the non-ionic surfactant is compounded by at least two of alkylphenol polyoxyethylene ether, aliphatic polyoxyethylene ether, and lauric acid diethanolamide.

4 . The aircraft engine flow channel cleaning agent according to claim 2 , wherein the anionic surfactant is an alcohol ether carboxylate.

5. The aircraft engine flow channel cleaning agent according to claim 1, characterized in that the saturated isoalkane has a carbon chain content of 8-12 and a boiling point of 180-200°C.

6. The method for using the aircraft engine flow channel cleaning agent according to any one of claims 1 to 5, characterized in that it comprises the following steps:

S1. The cleaning agent is placed in the cleaning device and heated to 80-100°C;

S2, the cleaning device is connected to the engine through pipes and nozzles;

S3. When the engine is running cold or slow, the cleaning device atomizes the cleaning medium into particles of 50-100 microns at a pressure of ≤0.4MPa, sprays it to the target area to be cleaned within 0.5-1min, and soaks the target area for 1-3min. This process is one cycle, and the amount of cleaning medium used in a single cycle is ≤20L;

S4, cleaning agent cleaning 5 to 10 cycles;

S5. Clean the target area with detergent for 4 to 8 cycles until the detergent flows out clean and the pH value is 7-8;

S6. Use borescope to check if there is any abnormality in the engine flow passage, and the cleaning target area is clean and has no cleaning agent residue.

7. The method for using the aircraft engine flow channel cleaning agent according to claim 6, characterized in that the cleaning liquid is a mixture of distilled water, soft water, pure water and a rust-proof additive.