RU2600648C1 - Process line for cleaning fuel supply elements of thermal engines - Google Patents

Abstract

FIELD: treatment.

SUBSTANCE: invention relates to ultrasonic treatment of hollow articles and can be used for recovery of operational characteristics of burner devices of engines. Process line for cleaning channels of fuel supply elements of an external or internal combustion thermal engine has a unit for diagnosis of degree of clogging of channels before and after cleaning and a unit for ultrasonic cleaning UUO of clogged channels in a liquid cleaning medium. First stage involves visual inspection of elements and using calibrated rods KST checking outlets of all fuel channels and mapping clogging of channels. Then blowing device UP is connected and channels are blown with gaseous or liquid agent under pressure. Elements are then directed into UUO, equipped with means for sampling and analysing COA composition of deposits to be cleaned. UUO COA is a furnace for thermal treatment of deposits, an impact tool, grinding tool for processing a collected sample and scanning electronic microscope for analysing a sample slide. Based on analysis most effective detergent is chosen. Then burner is immersed into solution, which is an ultrasonic generator USG is placed. After cleaning burner is again fed into UD 1 for repeated diagnosis. Cleaning completed if result is positive, otherwise burner is directed into UUO for repeated cleaning.

EFFECT: technical result is simpler and more qualitative diagnosis of state of controlled channels, their more qualitative cleaning due to improvement in ultrasonic cleaning process of detergent properties of cleaning medium.

3 cl, 3 dwg

Description

Technical field

The invention relates to ultrasonic cleaning of hollow products, in particular channels of fuel-dispensing elements of external or internal combustion engine heat engines, and can be used to restore the operational characteristics of burner devices of these engines.

State of the art

A known production line for cleaning the channels of the fuel-dispensing elements of a heat engine of internal combustion, comprising an ultrasonic cleaning unit for clogged channels in a liquid washing medium and a unit for diagnosing the degree of clogging of these channels after cleaning using a pressure-purging device equipped with measuring devices with a gaseous or liquid agent and (RU 14456 U1 , July 27, 2000, [1] - the closest analogue).

According to [1], in the diagnostic unit after cleaning, the fuel-dispensing elements are checked for leaks, spray quality and fuel consumption. The ultrasonic cleaning unit according to [1] involves the use of various solutions as a washing medium: sodium hydroxide, sodium chloride, alcohol-containing, benzene-containing or caustic-containing solutions.

The disadvantage of the closest analogue [1] in terms of diagnostics is the lack of diagnostics of the degree of clogging of the channels before cleaning the fuel-dispensing elements and the complexity of the technical solution with a relatively low degree of reliability of the results obtained, which practically exclude the possibility of reliable estimation of the degree of clogging of each individual channel of the controlled fuel-dispensing element. In terms of ultrasonic cleaning, the disadvantages [1] include the omission of the possibility of increasing the cleaning efficiency by enhancing the washing properties of the washing medium.

Disclosure of invention

The objective of the invention is to increase the reliability of cleaning with the most complete restoration of the initial characteristics of all channels being cleaned, and the technical results are technologically simpler and better diagnostics of the condition of the controlled channels, as well as their better cleaning due to the improvement of the washing properties of the washing medium during ultrasonic cleaning.

The solution of this problem and the achievement of the indicated technical results is ensured by the fact that in the processing line for cleaning the channels of the fuel-dispensing elements of an external or internal combustion engine, containing a diagnostic unit for determining the degree of clogging of these channels before and after cleaning using a device equipped with measuring devices to purge them under pressure with gaseous or liquid agent and ultrasonic cleaning unit for clogged channels in a liquid washing medium, according to the invention, diagnostic unit and further equipped with grooved bars for individually checking the degree of clogging of the channel of each fuel injection inspected element and ultrasonic cleaning unit - selection means and analyzing the composition of deposits to be cleaned.

Moreover, the said channel purge device can preferably be made in the form of a pipe segment with an inlet fitting for connecting to a purge agent source, an outlet nozzle for connecting to a fuel-distributing element to be tested, a flow meter and a purge agent pressure meter are installed on the indicated pipe segment, and for the convenience of connecting the nozzles the specified section of the pipeline is divided by a flexible hose into the inlet and outlet sections with the flowmeter installed on the first, and the meter yes Lenia - the second of them.

Said means for collecting and analyzing the composition of the deposits to be cleaned are preferably a furnace for heat treatment of deposits, a percussion instrument for separating the sample, a grinding tool for processing the selected sample, and a scanning electron microscope for analyzing the sample section.

The causal relationship between the distinguishing features of the invention and the achieved technical result is as follows:

The additional equipment of the diagnostics unit with calibrated rods for individual verification of the degree of clogging of each channel of the tested fuel-dispensing element makes it possible to reliably and simply diagnose the degree of clogging of each controlled channel with repeated cleaning as many times as necessary until the desired result is obtained.

The equipment of the ultrasonic cleaning unit by means of selection and analysis of the composition of the deposits to be cleaned makes it possible to select, for dissolution in the washing medium, an ultrasonic generator that is effective for this type of deposits, which significantly improves the quality of cleaning and reduces the required number of washing cycles.

Brief Description of the Drawings

In FIG. 1 is a schematic diagram of a production line according to the invention; in FIG. 2 - channel purge device made according to the invention; in FIG. 3 is an exemplary diagnostic map of the clogging of the fuel channels of a preliminary mixing burner of a combustion chamber of a gas turbine engine.

Legend

GTE - gas turbine engine;

GPS - pre-mixing burner;

ICE - internal combustion engine;

SAM - shut-off and control valve;

KS - combustion chamber;

KST - calibrated rods;

SOA - means of selection and analysis of sediments;

UZG - an ultrasonic generator;

UD - diagnostic node;

UP - purge device;

UUO - ultrasonic cleaning unit.

Decoding of the numbering of the positions of the figures of the drawing

1 - UD; 2 - УУО; 3 - UP; 4 - fuel channels; 5 - GPS; 6 - KST; 7 - input section UP; 8 - output section UP; 9 - a flexible hose; 10 - connecting fittings; 11 - flow meter; 12 - pressure meter purge agent; 13 - SAM; 14 - SOA.

DETAILED DESCRIPTION OF THE INVENTION

The processing line for cleaning the channels of the fuel-distributing elements of a heat engine of external or internal combustion engine (ICE) is described below with reference to the cleaning of the fuel-dispensing elements of preliminary mixing burners (GPS) of the combustion chamber (CS) of a gas turbine engine (GTE).

KS is an important component of gas turbine engine, providing the preparation of the working fluid in the form of gaseous or liquid fuel combustion products diluted with air. The working fluid drives the rotor of the gas turbine engine (gas turbine). Since the working fluid is supplied to the gas turbine from the outside (from the compressor station), such an engine is classified as an external combustion engine, unlike reciprocating or rotary piston engines, where, in order to obtain a working fluid, the engines are burned directly in the working cylinder, which is called the internal combustion engine ( ICE).

A feature of the GPS KS GTD is the supply of fuel through fuel-dispensing elements (nozzles, radial spokes or blades of an air swirl) with small diameter channels. The slightest degree of clogging of such channels by various kinds of deposits leads to an uneven supply of fuel both inside an individual burner and throughout the entire compressor station. This, in turn, causes a non-uniformity of the temperature field at the outlet of the compressor station with local excesses of the permissible temperature of the gas stream, which increases the emission of nitrogen oxides and incomplete combustion of the fuel. The uneven distribution of fuel consumption over the channels also affects the stability of the combustion process, which can lead to pressure pulsations in the compressor station, breakdowns or breakthroughs of the flame into the zone of preliminary mixing of the burner. In addition, the presence of local high-temperature zones can lead to damage to the elements of the GPS and the gas tube of the gas turbine engine.

To ensure reliable, low-emission and economical operation of the gas turbine engine, it is necessary to keep the initial flow rate characteristics of the gas turbine unchanged. For this, it is necessary to regularly conduct proper cleaning of the channels of the fuel-distributing elements of the burners.

The technological line for cleaning the channels of the fuel-dispensing elements of the GPS KS GTD according to the invention comprises (Fig. 1) a diagnostic unit (UD) of 1 degree of clogging of the controlled channels before and after cleaning and an ultrasonic cleaning unit (UOF) of 2 clogged channels in a liquid washing medium.

UD 1 is equipped with a purge device (UP) 3 (Fig. 2) of monitored fuel channels 4 of GPS 5 (Fig. 3), as well as calibrated rods (CCT) 6 (Fig. 1), the diameter of which corresponds to the inner diameter of the tested channels 4 with a minimum gap for free entry into an unclogged channel.

UP 3 according to the invention is a segment of the pipeline with inlet and outlet sections 7 and 8, respectively, separated for ease of connection to a purge agent source and a diagnosed burner (not shown) using a flexible hose 9. For connecting these elements 7, 8, 9 to each other and all UP 3 with the source of the purge agent and with the diagnosed burner, fittings 10 are provided. The UP 3 is equipped with measuring tools in the form of a flow meter 11 installed at the inlet section 7 and a purge pressure meter 12 of agent installed on the output portion 8 UE 3. In addition, UE 3 is provided with a shut-off control valve (SAM) 13.

UOO 2 is equipped with selection and analysis (SOA) 14 of the composition of the deposits to be cleaned (Fig. 1). These means are, respectively, not shown in the drawing, a furnace for heat treatment of deposits, a percussion instrument for separating the sample, a grinding tool for processing the selected sample, and a scanning electron microscope for analysis of the sample thin section.

Work line

The technological line according to the invention operates as follows. In UD 1, at the first stage, a visual inspection is carried out of the gas turbine engine assembly 5 removed for cleaning. Then, with the help of KST 6, the outlet openings of all of its fuel channels 4 are checked for clogging, after which a blockage map of channels 4 is made (Fig. 3). At the next stage of diagnosis, UP 3 is connected to the GPS 5, setting the desired flow rate through the GPS 5 of the purge agent (compressed air) using the air defense system 13 and the flow meter 11. At the same time, the differential pressure that occurs at GPS 5 is monitored using a compressed air pressure meter 12, which is compared with the initial value of this value for this burner before it is put into operation. On this, the preliminary diagnosis of the clogged burner is completed, and it is transferred to DOE 2.

In DOE 2, at the first stage, the burner 5 is placed in a furnace for heat treatment of deposits, which makes them less durable. Using a percussion instrument, a sample is taken, the composition of which, after preparing the thin section, is analyzed using a scanning electron microscope, followed by the selection of the most effective washing reagent among the known ones. Then, the burner to be cleaned is immersed in an aqueous solution of the selected reagent, where an ultrasonic generator (USG) of one of the known types is also placed, including it in operation for a time established experimentally (usually 2 ... 6 hours). After turning off the ultrasonic cleaner, the cleaned burner is again sent to UD 1 for re-diagnosis. With positive results, the cleaning is considered complete. Otherwise, the burner is sent to UUO 2 for re-cleaning.

Industrial applicability

The production line according to the invention meets the condition of "industrial applicability". Its essence is disclosed in the formula, description and figures of the drawing quite clearly, and the tools used are simple, available for industrial implementation in industries using heat engines of external and internal combustion, operating on gaseous and liquid fuels.

Claims (3)

1. Technological line for cleaning the channels of the fuel-dispensing elements of an external or internal combustion engine, containing a unit for diagnosing the degree of clogging of these channels before and after cleaning using a gaseous or liquid agent purged under pressure with a measuring device, and an ultrasonic unit for clogging the blocked channels in a liquid washing unit environment, characterized in that the diagnostic unit is additionally equipped with calibrated rods for individually checking the degree of clogging Nia each channel element under test fuel injection, and ultrasonic cleaning unit - selection means and analyzing the composition of deposits to be cleaned. 2. The production line according to claim 1, characterized in that the channel purge device is made in the form of a pipe segment with an inlet fitting for connecting to a purge agent source, an outlet fitting for connecting to a fuel-distributing element to be tested, a flow meter and a purge pressure meter installed on said pipe segment agent, and for the convenience of connecting the fittings, the indicated pipe segment is divided by a flexible hose into the inlet and outlet sections with the flowmeter installed on the first, and pressure of Tell - the second of them. 3. The production line according to claim 1, characterized in that the means for selecting and analyzing the composition of the deposits to be cleaned are, respectively, a furnace for heat treatment of deposits, a percussion instrument for separating the sample, a grinding tool for processing the selected sample, and a scanning electron microscope for analyzing the sample thin section .

Images