CN115232678B - Cleaning liquid and cleaning method for aero-engine bearing cartridge receiver flow channel - Google Patents

Cleaning liquid and cleaning method for aero-engine bearing cartridge receiver flow channel Download PDF

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Publication number
CN115232678B
CN115232678B CN202210895311.3A CN202210895311A CN115232678B CN 115232678 B CN115232678 B CN 115232678B CN 202210895311 A CN202210895311 A CN 202210895311A CN 115232678 B CN115232678 B CN 115232678B
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cleaning
weight
parts
sodium
salt
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CN115232678A (en
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吕开山
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Kunshan Silver Precision Moulding Co ltd
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Kunshan Silver Precision Moulding Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • C11D1/146—Sulfuric acid esters
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/046—Salts
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/06—Phosphates, including polyphosphates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/10—Carbonates ; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/18—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/43—Solvents
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/12—Carbonates bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/24—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5027—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/002—Cleaning of turbomachines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • C11D2111/20—

Abstract

The invention relates to B08B7, in particular to a cleaning solution and a cleaning method for a flow passage of a bearing casing of an aero-engine. The cleaning solution for the aircraft engine bearing cartridge receiver flow passage comprises the raw materials of 3-8 parts by weight of inorganic salt, 2-3.5 parts by weight of surfactant, 2.6-4.6 parts by weight of hydrocarbon solvent and 85-91 parts by weight of water. The alkaline salt and the inorganic salt are added into the cleaning liquid system, so that the oil dirt removing effect is excellent, and the problem that the semi-water-based system is generally poor in stability is solved; the density is 0.72-0.79g/cm 3 The distillation range is 12-25 ℃; the hydrocarbon solvent with the initial distillation point of 100-180 ℃ and the final distillation point of 150-220 ℃ further enhances the cleaning effect, and simultaneously, the friction between the blade and the casing is obviously reduced after cleaning, so that the possibility of abrasion and blade breakage of the aeroengine bearing is reduced. The cleaning solution provided by the invention can achieve good cleaning effect on the flow channel and the blade through the aeroengine bearing casing flow channel without dismantling the blade.

Description

Cleaning liquid and cleaning method for aero-engine bearing cartridge receiver flow channel
Technical Field
The invention relates to B08B7, in particular to a cleaning solution and a cleaning method for a flow passage of a bearing casing of an aero-engine.
Background
In the daily use operation of the aeroengine, the deposition of impurities such as oil dirt and the like on the surface of the blade can be caused, the thickness of the blade is increased, the blade profile of the blade is changed, and therefore the efficiency of the engine is reduced to a certain extent. In order to avoid the above-mentioned problems of reduced efficiency of the aeroengine, it is often necessary to clean the blades of the engine.
The patent No. CN104385046B provides a method for cleaning the runner hole of the engine bearing casing part, which uses silicon organic resin as a plugging material, so that the plugged machining is more convenient, and the plugging material is blown out after the machining. The patent No. CN103602996B provides an aircraft engine blade cleaning solution and a preparation method and a use method thereof, polyoxyethylene ether, amide and jet fuel are mixed, and the blade is independently soaked and cleaned after being removed, so that the cleaning effect is improved.
Therefore, in the prior art, there are few methods in the prior art that can achieve a good cleaning effect without removing the blade.
Disclosure of Invention
In order to solve the problems, a first aspect of the invention provides a cleaning solution for an aeroengine bearing cartridge receiver flow passage, wherein the cleaning solution comprises, by weight, 3-8 parts of inorganic salt, 2-3.5 parts of surfactant, 2.6-4.6 parts of hydrocarbon solvent and 85-91 parts of water.
As a preferred embodiment of the present invention, the inorganic salt includes basic salt and neutral salt.
Preferably, in the inorganic salt, the weight ratio of the basic salt to the neutral salt is (2-5): (2-3).
Further preferably, in the inorganic salt, the weight ratio of the basic salt to the neutral salt is (3.6-4.5): (2-3).
As a preferred embodiment of the present invention, the basic salt is selected from one or more of trisodium phosphate, sodium tripolyphosphate, sodium carbonate, sodium dihydrogen carbonate and sodium hydrogen carbonate.
Preferably, the basic salts are trisodium phosphate and sodium carbonate.
Further preferably, the weight ratio of trisodium phosphate to sodium carbonate is 1:1.
as a preferred embodiment of the present invention, the neutral salt is selected from one or more of sodium chloride, potassium chloride and sodium hypophosphite.
As a preferable technical scheme of the invention, the neutral salt is sodium chloride and sodium hypophosphite, and the weight ratio of the sodium chloride to the sodium hypophosphite in the neutral salt is 1: (1-1.5).
Preferably, in the neutral salt, the weight ratio of sodium chloride to sodium hypophosphite is 1:1.3.
generally, the solvent-type cleaning agent has better cleaning effect, but does not have environmental protection, and the waste liquid treatment is time-consuming and labor-consuming; although the water-based cleaning agent has high environmental protection performance, the cleaning effect is poor, so that new cleaning agent systems are developed. The semi-water-based microemulsion system provided by the invention is environment-friendly and ensures the cleaning effect on the engine runner. Through a great deal of thought and experimentation, the applicant found that the addition of alkaline salts and inorganic salts, in particular inorganic salts, to the cleaning liquid system was 1 by weight: sodium chloride and sodium hypophosphite of (1-1.5) not only provide excellent oil scale removal but also unexpectedly alleviate the problem of generally poor stability of semi-aqueous systems. The applicant has hypothesized that in the environment of hydrocarbon solvent, water, surfactant, and oil stain, the sodium chloride, sodium hypophosphite, and alkaline salt cooperate in the process of combining the cleaning fluid system and the oil stain to form a microemulsion, such that electromigration and mobility in the system are affected, and such that the cleaning fluid and engine oil stain effects are improved.
As a preferred embodiment of the present invention, the surfactant is one or more selected from sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and triethanolamine.
As a preferable technical scheme of the invention, the surfactant is sodium dodecyl benzene sulfonate and triethanolamine.
Preferably, in the surfactant, the weight ratio of the sodium dodecyl benzene sulfonate to the triethanolamine is (1.8-2.3): (0.5-1).
Further preferably, in the surfactant, the weight ratio of sodium dodecyl benzene sulfonate to triethanolamine is 2: (0.5-1).
As a preferable technical scheme of the invention, the density of the hydrocarbon solvent is 0.72-0.79g/cm 3 。
As a preferable technical scheme of the invention, the distillation range of the hydrocarbon solvent is 12-25 ℃; wherein the initial distillation point is 100-180deg.C, and the final distillation point is 150-220deg.C.
Preferably, the preparation method of the cleaning solution for the aero-engine bearing casing flow passage comprises the following steps: mixing the raw materials according to parts by weight.
The second aspect of the invention provides a cleaning method for cleaning a flow passage of a bearing casing of an aeroengine, which comprises the following steps: after the cleaning liquid is placed in the high-pressure cleaning equipment, the cleaning liquid is sprayed out of the high-pressure cleaning equipment and passes through the flow passage of the bearing casing of the aero-engine to reach the blade.
Compared with the prior art, the invention has the following beneficial effects:
adding alkaline salt and inorganic salt, especially inorganic salt, into a cleaning liquid system in a weight ratio of 1: when the sodium chloride and the sodium hypophosphite are used in the formula (1-1.5), not only the oil scale removing effect is excellent, but also the problem that the stability of a semi-water-based system is usually poor is solved unexpectedly; the density is 0.72-0.79g/cm 3 The distillation range is 12-25 ℃; the hydrocarbon solvent with the initial distillation point of 100-180 ℃ and the final distillation point of 150-220 ℃ further enhances the cleaning effect, and simultaneously, the friction between the blade and the casing is obviously reduced after cleaning, so that the possibility of abrasion and blade breakage of the aeroengine bearing is reduced. The cleaning liquid provided by the invention does not need to remove the blade and is communicated withThe good cleaning effect on the flow passage and the blades can be achieved by passing through the flow passage of the aero-engine bearing casing.
Detailed Description
Examples
Examples sodium dodecylbenzenesulfonate had a CAS number of 25155-30-0, triethanolamine had a CAS number of 102-71-6, and hydrocarbon solvents of examples 1, 3 and 4 were sourced differently, with hydrocarbon solvent of example 1 being available from Exxsol, model Exxsol, U.S TM D40, density of 0.775g/cm 3 The distillation range is 24 ℃; wherein the initial point of distillation is 163℃and the final point of distillation is 187℃and example 3 hydrocarbon solvent was purchased from Exxsol, model Exxsol, U.S.A. TM D30, density of 0.766g/cm 3 The distillation range is 14 ℃; wherein the initial point of distillation is 142℃and the final point of distillation is 156℃and the hydrocarbon solvent of example 4 is obtained from Exxsol, model Exxsol, U.S.A TM D60 (S) a density of 0.793g/cm 3 The distillation range is 30 ℃; wherein the initial point of distillation is 185 ℃ and the final point of distillation is 215 ℃.
Example 1
The example provides a cleaning solution for an aero-engine bearing cartridge receiver flow passage, wherein the cleaning solution for the aero-engine bearing cartridge receiver flow passage comprises the following raw materials of 6.3 parts by weight of inorganic salt, 2.7 parts by weight of surfactant, 3.1 parts by weight of hydrocarbon solvent and 87.9 parts by weight of water.
Inorganic salts include basic salts and neutral salts. In the inorganic salt, the weight ratio of the basic salt to the neutral salt is 4:2.3.
the basic salts are trisodium phosphate and sodium carbonate. The weight ratio of trisodium phosphate to sodium carbonate is 1:1.
the neutral salt is sodium chloride and sodium hypophosphite, and the weight ratio of the sodium chloride to the sodium hypophosphite in the neutral salt is 1:1.3.
the surfactant is sodium dodecyl benzene sulfonate and triethanolamine. In the surfactant, the weight ratio of the sodium dodecyl benzene sulfonate to the triethanolamine is 2:0.7.
the preparation method of the cleaning liquid of the aero-engine bearing casing flow passage comprises the following steps: mixing the raw materials according to parts by weight.
Example 2
The present example provides a cleaning solution for an aero-engine bearing cartridge receiver flow passage, which is different from example 1 in that the cleaning solution for an aero-engine bearing cartridge receiver flow passage comprises, as raw materials, 5.6 parts by weight of inorganic salt, 2.4 parts by weight of surfactant, 2.7 parts by weight of hydrocarbon solvent and 89.3 parts by weight of water.
Inorganic salts include basic salts and neutral salts. In the inorganic salt, the weight ratio of the basic salt to the neutral salt is 3.6:2.
example 3
The present example provides a cleaning solution for an aero-engine bearing cartridge receiver flow passage, which is different from example 1 in that the cleaning solution for an aero-engine bearing cartridge receiver flow passage comprises, as raw materials, 7.3 parts by weight of inorganic salt, 3.5 parts by weight of surfactant, 4.2 parts by weight of hydrocarbon solvent and 85 parts by weight of water.
Inorganic salts include basic salts and neutral salts. In the inorganic salt, the weight ratio of the basic salt to the neutral salt is 4.5:2.8.
example 4
The present example provides a cleaning solution for an aero-engine bearing cartridge receiver flow passage, which is different from example 1 in that the cleaning solution for an aero-engine bearing cartridge receiver flow passage comprises, as raw materials, 6.1 parts by weight of inorganic salt, 3 parts by weight of surfactant, 3.4 parts by weight of hydrocarbon solvent and 87.5 parts by weight of water. And the sources of hydrocarbon solvents are different.
Inorganic salts include basic salts and neutral salts. In the inorganic salt, the weight ratio of the basic salt to the neutral salt is 3.8:2.3. in the surfactant, the weight ratio of the sodium dodecyl benzene sulfonate to the triethanolamine is 2:1.
example 5
The present example provides a cleaning solution for a flow passage of an aero-engine bearing casing, which is different from the example 1 in that, in the inorganic salt, the weight ratio of basic salt to neutral salt is 4:3, a step of; the neutral salt is sodium chloride and sodium hypophosphite, and the weight ratio of the sodium chloride to the sodium hypophosphite in the neutral salt is 1:2.
performance test:
1. stability test: centrifuging the cleaning solution of the aeroengine bearing cartridge receiver flow passage obtained in the examples 1-5 at a rotating speed of 10000r/min for 12min, observing the appearance of the centrifuged cleaning solution, standing for one week at 35 ℃, and then observing the appearance again, wherein the results are shown in Table 1:
TABLE 1
2. And (3) cleaning effect test: the cleaning method according to the invention for cleaning the flow passage of the bearing casing of the aeroengine obtained in examples 1-5 comprises the following steps: after the cleaning liquid is placed in high-pressure cleaning equipment (from Kunssienoba precision die with limited company), the cleaning liquid is sprayed out from the high-pressure cleaning equipment, passes through a bearing casing runner of the aero-engine and reaches the blade. After cleaning, the leaves were removed, again immersed in the cleaning solution at 55 ℃ for 100min, and the appearance of the cleaning solution was checked, and the results are shown in table 2:
TABLE 2
Examples Appearance of cleaning liquid
1 No lump coke coagulation and no black small granular suspended matters in the solution
2 No lump coke coagulation and no black small granular suspended matters in the solution
3 No lump coke coagulation and no black small granular suspended matters in the solution
4 The block Jiao Zhi is coagulated and the solution contains black small granular suspended matters
5 No lump coke coagulation, black small granular suspended matters in the solution

Claims (3)

1. The cleaning solution for the aircraft engine bearing cartridge receiver runner is characterized by comprising the following raw materials of 3-8 parts by weight of inorganic salt, 2-3.5 parts by weight of surfactant, 2.6-4.6 parts by weight of hydrocarbon solvent and 85-91 parts by weight of water; the inorganic salt comprises basic salt and neutral salt, wherein the neutral salt is sodium chloride and sodium hypophosphite, and the weight ratio of the sodium chloride to the sodium hypophosphite in the neutral salt is 1: (1-1.5); the density of the hydrocarbon solvent is 0.72-0.79g/cm 3 The distillation range of the hydrocarbon solvent is 12-25 ℃; wherein the initial distillation point is 100-180 ℃ and the final distillation point is 150-220 ℃;
the surfactant is a mixture of sodium dodecyl benzene sulfonate and triethanolamine; the weight ratio of the sodium dodecyl benzene sulfonate to the triethanolamine is (1.8-2.3): (0.5-1).
2. The cleaning solution for aircraft engine bearing cartridge receiver flow passages according to claim 1, wherein the basic salt is selected from one or more of trisodium phosphate, sodium tripolyphosphate, sodium carbonate, sodium dihydrogen carbonate, sodium bicarbonate.
3. A method for cleaning a cleaning solution for a flow passage of an aero-engine bearing casing according to any one of claims 1-2, characterized in that the method comprises the following steps: after the cleaning liquid is placed in the high-pressure cleaning equipment, the cleaning liquid is sprayed out of the high-pressure cleaning equipment and passes through the flow passage of the bearing casing of the aero-engine to reach the blade.
CN202210895311.3A 2022-07-26 2022-07-26 Cleaning liquid and cleaning method for aero-engine bearing cartridge receiver flow channel Active CN115232678B (en)

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