CN115753126A - Engine flow passage desalting verification method and cleaning system - Google Patents

Abstract

The invention discloses a desalting verification method and a cleaning system for an engine runner, wherein the desalting verification method for the engine runner comprises the following steps: calibrating the engine; carrying out salt-attaching treatment on a compressor blade of the engine; desalting the compressor blade after salt attachment; determining the result of the desalting treatment. The invention can carry out desalting test by combining different parameters such as the aperture, the number, the distribution, the spray angle, the pressure, the flow of the flushing medium and the like of the nozzles of the annular cleaning structure, and can quickly carry out the comparison of the desalting effect.

Description

Engine flow passage desalting verification method and cleaning system

Technical Field

The invention belongs to the technical field of engines, and particularly relates to a desalting verification method and a cleaning system for an engine runner.

Background

Because the inlet environment of the engine is severe and complex, particularly when the engine works in a humid salt fog environment in a sand-dust area and a coastal area, deposits are particularly easily formed in an airflow channel of the engine, and the blade runners of component profiles such as an air inlet channel, an air compressor, a turbine and the like accumulate dust, corrode, deform, form oil sludge and the like, so that the theoretical size data of the blades of the engine runner are changed, the power and the performance are reduced, the use safety of the engine is seriously influenced, and the engine runner needs to be cleaned regularly. Particularly, for an engine working in a marine environment, salt is easy to adhere to an air inlet channel and a compressor blade to form salt due to heavy salt fog, high temperature and high humidity in coastal areas, and further causes hot corrosion to turbine blades, the hot corrosion can cause the strength of the blades to be reduced, a fatigue source is formed, cracks are generated, the service life of the engine is shortened, and therefore, in order to reduce the influence of the environment on the engine and ensure the long-life and reliable work of the engine, a new engine runner cold washing desalting verification method is urgently needed to be provided to solve one of the problems.

Disclosure of Invention

Aiming at the problems, the invention discloses a desalting verification method for an engine runner, which comprises the following steps:

calibrating the engine;

carrying out salt attaching treatment on a compressor blade of the engine;

desalting the compressor blade after salt attachment;

determining the result of the desalting treatment.

Further, the salt-attaching treatment comprises soaking salt-attaching treatment and cold-running salt-attaching treatment.

Further, the specific steps of the cold running salt attaching are as follows:

connecting and checking the cleaning system, and setting the pressure of the cleaning system, the flow of a flushing medium, the aperture of the nozzles and the circumferential arrangement number of the nozzles;

and in the cold running state of the engine, the rotary engine is carried for 2-5 min, and the saline solution is sucked.

Further, the desalting treatment includes a soaking desalting treatment and a cold-running desalting treatment.

Furthermore, the soaking desalination treatment comprises the following specific steps:

starting the engine to a ground slow vehicle state and running for 3-5 min, and adjusting the engine to idle slow, 25% maximum continuous, 50% maximum continuous and 75% maximum continuous states, and respectively working for 3-5 min;

adjusting the engine to an idle slow state to work for 3-5 min, and a ground slow vehicle state to run for 5-10 min, and stopping;

after the engine is cooled, taking out the stator blade with the surface attached with salt, putting the runner part of the stator blade into a container filled with deionized water, standing for 5-15 min, taking out, and measuring the concentration of the solution sodium chloride in the container;

and putting the soaked stator blade into the deionized water again, and stirring for 5-10 min.

Furthermore, the cold-running desalting treatment comprises the following specific steps:

starting the engine to a ground slow-speed state, running for 3-5 min, adjusting the engine to an idle slow state, a 25% maximum continuous state, a 50% maximum continuous state and a 75% maximum continuous state, and respectively working for 3-5 min;

adjusting the engine to an idle slow state to work for 3-5 min, and operating the ground slow vehicle for 3-5 min, and stopping the vehicle;

when the total temperature of the outlet of the gas turbine of the engine is lower than a set value, connecting and checking a cleaning system, and setting the pressure of the cleaning system, the flow of a flushing medium, the aperture of a nozzle and the circumferential arrangement number of the nozzles;

in the cold running state of the engine, the rotary engine is driven for 2-5 min, and flushing medium is sucked;

after the cold running is finished, starting the engine to run for 5-10 min in a ground slow running state, and stopping the vehicle;

after the engine is cooled, taking out the stator blade with the surface attached with salt, putting the runner part of the stator blade into a container filled with deionized water, standing for 5-15 min, taking out, and measuring the concentration of the solution sodium chloride in the container;

and putting the soaked stator blade into the deionized water again, and stirring for 5-15 min.

The cleaning system based on the engine runner desalting verification method comprises the following steps: cleaning equipment and an annular cleaning structure;

the cleaning equipment is connected with the annular cleaning structure through a pipeline.

Still further, the annular cleaning structure includes: an annular tube, a plurality of first nozzles and a plurality of second nozzles;

the annular pipe is connected with the cleaning equipment through a plurality of pipelines;

one side of the annular pipe is circumferentially and uniformly connected with a plurality of first nozzles and a plurality of second nozzles in a rotating manner;

the first nozzle and the second nozzle are axially and circumferentially spaced.

Furthermore, the aperture of the first nozzle and the second nozzle ranges from 0.8mm to 1.6mm, and the total number of the nozzles is 8 to 18.

Furthermore, the pressure of the annular cleaning structure is 0.1-0.5 MPa, and the flow rate is 6-15L/min.

Compared with the prior art, the embodiment of the invention has at least the following advantages: the invention can rapidly compare and verify the desalting effect through the multi-scheme combined desalting test of different parameters such as the aperture, the number, the distribution, the spray angle, the pressure, the flow of a flushing medium and the like of the nozzle of the annular cleaning structure, and obtain:

1) The optimal cleaning nozzle aperture, number, distribution, spray angle and the like for desalting the blades of the engine runner;

2) The optimal pressure, medium and flow rate required by desalting flushing;

3) Optimal desalting soaking and rinsing time;

4) The cleaning system and the nozzle processing quality can be checked and controlled.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 shows a schematic structural diagram of a cleaning system according to an embodiment of the invention;

FIG. 2 shows a schematic diagram of a ring cleaning configuration according to an embodiment of the invention.

Reference numerals: 1. cleaning equipment; 2. an annular tube; 3. a first nozzle; 4. a second nozzle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Compressor runner retrofit

The compressor runner is properly modified, and compressor stator blades which can be disassembled and assembled in the state of a complete machine are arranged.

The invention provides a desalting verification method for an engine runner, which comprises the following steps:

calibrating the engine;

carrying out salt-attaching treatment on a compressor blade of the engine;

desalting the compressor blade after salt attachment;

determining the result of the desalting treatment.

The engine runner desalting verification method can verify and evaluate the effect of desalting attached to compressor blades of different models, materials and shapes, and can quickly perform desalting comparison and effect verification through multi-scheme combined tests of different parameters such as the aperture, the number, the distribution, the injection angle, the pressure, the flow and the like of cleaning nozzles.

The specific contents of the engine runner desalting verification method are as follows:

1 desalting test after soaking leaves in salt water

Before the test is started, whether the performance of the engine meets the use requirements such as power and oil consumption rate should be confirmed. Illustratively, for a certain type of engine, whether the power is more than or equal to 600kW or not and whether the oil consumption is less than or equal to 0.26 kg/(kWh).

This part of the test requires 2 to 6 repetitions of the following procedure.

1.1 attaching sodium chloride to the stator blades of a compressor

a) According to the following steps of 4:1, preparing a sodium chloride solution of deionized water and sodium chloride (with the purity of more than 99 percent) in proportion, sampling, and measuring the actual concentration of the sodium chloride in the solution;

b) Placing stator blades of the compressor on a metal bracket, and hanging the bracket on a container opening;

c) Adding a proper amount of prepared sodium chloride solution into a container until just submerging a runner area of a stator blade of the gas compressor needing soaking, and soaking the bracket for 5-15 min without contacting the sodium chloride solution;

d) And taking out the stator blade with the bracket from the container, drying for 5min after blowing off and hanging drops, loading the stator blade into an engine after no obvious water stain exists on the surface of the stator blade and the residual sodium chloride solution is crystallized, and not touching a soaking area in the assembling process.

1.2 soaking desalting test of salt-attached leaves

Before the test, the stator blade attached with sodium chloride is ensured to be assembled, and the test steps of the engine each time are as follows:

a) Starting the engine to run for 3-5 min (the preferred value is 3 min) in a ground slow-speed state, pushing the engine to be in idle-slow, 25% of maximum continuous, 50% of maximum continuous, 75% of maximum continuous and other states, and working for 3-5 min (the preferred value is 3 min) respectively;

b) Pulling down the engine to an idle-slow state to work for 3-5 min (the optimal value is 3 min);

c) The ground slow vehicle runs for 5-10 min (the optimal value is 8 min);

d) Parking;

e) After the engine is cooled, taking out the stator blade with the surface attached with salt, only putting the runner part of the stator blade into a container filled with deionized water, standing for 5-15 min, taking out, inspecting the solution, and measuring the concentration M0 (g/L) of sodium chloride;

f) Putting the soaked stator blade into deionized water again, and stirring for 5-10 min (preferably 5 min), wherein the purpose is to eliminate the interference of impurities on the surface of the stator blade; and drying the stator blades and carrying out subsequent operation.

Note that no direct contact with the sodium chloride solution or test piece soak zone is possible throughout the procedure. To make the detection more accurate, the solution required to precipitate sodium chloride should be minimal.

1.3 salt-attached leaf washing and desalting test

The sodium chloride is attached to the stator blades according to 1.1 strips, and before the test, the stator blades attached with the sodium chloride are ensured to be assembled, and the content of each test is as follows:

a) Starting the engine to run for 3-5 min (the preferred value is 3 min) in a ground slow-speed state, pushing the engine to be in idle-slow, 25% of maximum continuous, 50% of maximum continuous, 75% of maximum continuous and other states, and working for 3-5 min (the preferred value is 3 min) respectively;

b) Pulling down the engine to an idle slow state and a ground slow state, and working for 3-5 min (the preferred value is 3 min) respectively;

c) Parking;

d) When the temperature Tt4.5 (total temperature of an outlet of a gas turbine of the engine) is lower than a set value of 130 ℃, connecting and checking the cleaning system, and adjusting the pressure of the cleaning system, the flow of a flushing medium and the circumferential arrangement quantity of nozzles to meet the set requirements of the test;

e) In the cold running state of the engine, the engine is driven to rotate for 2-5 min, and clean water is sucked; preferably, the rotary engine is carried for 2min (cold running is carried out for 1min twice);

f) After the cold running is finished, starting the engine to run for 5-10 min in a slow state and then stopping the engine (drying the engine);

g) After the engine is cooled, taking out the stator blade with the salt attached to the surface, putting the runner part of the stator blade into a container filled with deionized water (it needs to be noted that the water consumption in the container is the same each time), standing for 5-15 min, taking out, measuring the concentration M1 (g/L) of the sodium chloride solution in the container, comparing the concentration M1 (g/L) with the concentration M0 of the sodium chloride separated out in the item 1.2, and according to the relative reduction of the concentration:

the effect of removing sodium chloride on the surface of the blade is known and evaluated;

h) And putting the soaked stator blade into the deionized water again, and stirring for 5-15 min.

2 Cold running desalting test with salt

This part of the test requires 2 to 6 repetitions of the following procedure.

2.1 test for salt absorption, soaking and desalting of leaves

a) Connecting and checking the cleaning system, and adjusting the pressure of the cleaning system, the flow of a flushing medium, the aperture of the nozzles and the circumferential arrangement number of the nozzles to meet the set requirements of the test;

b) In the cold running state of the engine, the rotary engine is driven for 2-5 min, and saline solution is sucked; preferably, the engine is driven for 2min (cold running is carried out for 1min twice);

c) After soaking for 5-15 min, starting the engine to run for 3-5 min (the preferred value is 3 min) in a ground slow vehicle state, and pushing the engine up to the idle slow state, the 25% maximum continuous state, the 50% maximum continuous state, the 75% maximum continuous state and the like, wherein the work time is 3-5 min (the preferred value is 3 min);

d) Pulling down the engine to an idle-slow state to work for 3-5 min (the optimal value is 3 min);

e) The ground slow vehicle runs for 5-10 min (the optimal value is 8 min);

f) Parking;

g) And after the engine is cooled, taking out the stator blade with the salt attached to the surface, only putting the runner part of the stator blade into a container filled with deionized water, standing for 5-15 min, taking out, inspecting the solution, and measuring the concentration M2 (g/L) of sodium chloride.

2.2 leaf suction salt flushing desalting test

a) Connecting and checking the cleaning system, and adjusting the pressure of the cleaning system, the flow of a flushing medium, the aperture of the nozzles and the circumferential arrangement number of the nozzles to meet the set requirements of the test;

b) In the cold running state of the engine, the forward motor is driven for 2-5 min to suck salt solution; preferably, the rotary engine is carried for 2min (cold running is carried out for 1min twice);

c) After soaking for 5-15 min, starting the engine to run for 3-5 min (the preferred value is 3 min) in a ground slow-speed state, pushing the engine upwards to a state of idle speed, 25% maximum continuous, 50% maximum continuous, 75% maximum continuous and the like, and working for 3-5 min (the preferred value is 3 min) respectively;

d) Pulling down the engine to an idle slow state and a ground slow state, and working for 3-5 min (the optimal value is 3 min) respectively;

e) Parking;

f) When the temperature Tt4.5 (total temperature of an outlet of a gas turbine of the engine) is lower than a set value of 130 ℃, connecting and checking the cleaning system, and adjusting the pressure of the cleaning system, the flow of a flushing medium and the circumferential arrangement quantity of nozzles to meet the set requirements of the test;

g) In the cold running state of the engine, the engine is driven to rotate for 2-5 min, and clean water is sucked; preferably, the rotary engine is carried for 2min (cold running is carried out for 1min twice);

h) After the cold running is finished, starting the engine to run for 5-10 min in a slow state and then stopping the engine (drying the engine);

i) After the engine is cooled, taking out the stator blade with salt attached to the surface, putting the runner part of the stator blade into a container filled with deionized water (it needs to be noted that the water consumption in the container is the same each time), standing for 5-15 min, taking out, measuring the concentration M3 (g/L) of the solution sodium chloride in the container, and comparing the concentration M2 with the concentration M2 measured in the item 2.1 to know the effect of removing the sodium chloride on the surface of the blade;

j) And putting the soaked stator blade into the deionized water again, and stirring for 5-15 min.

Through the comparative evaluation of the effects of the desalting test after the blades are soaked in saline water and the cold-running salt-attached desalting test and the comparison with the initially prepared sodium chloride solution, the optimal matching parameters such as the blade cleaning pressure, the flow rate of a flushing medium, the nozzle and spray angle, the circumferential arrangement number, the engine cleaning test and the like can be found out. After washing test of the leaves, the reduction of M3 to M2:

the engine runner desalination test can be considered to meet the use requirements.

3. Safety requirements

1) The engine should closely monitor the engine speed, temperature and vibration condition of each point in the test process, and stop immediately when the abnormal increase of the engine vibration and unstable work exist in the test process;

2) In the test, the corrosion defects on the surface of the blade are photographed and recorded;

3) And after the part of tests are finished, carrying out hole detector inspection on the engine, and finishing recalibration of the engine, and stopping the tests if the inspection shows that the runner piece has cracks, severe scraping and even curling.

Cold washing: generally refers to the washing of an engine by injecting a washing solvent into the engine in a cold engine operating state.

The ground slow-speed vehicle state: the engine speed at which the engine can maintain a minimum state of engine operation at ground level and can be adjusted using the position of the throttle lever of the engine.

Blank slow: during the flying and descending process of the airplane, the engine is used for maintaining the minimum rotating speed state of low-thrust stable operation.

Maximum continuity: the engine can be continuously operated in the maximum thrust working state.

And (3) cold running: the cold running of the engine is to use the engine to drive the rotor of the engine to rotate, and the engine does not supply oil and ignite in the process.

Fig. 1 shows a schematic structural diagram of a cleaning system according to an embodiment of the present invention. As shown in fig. 1, the present embodiment proposes a spray cleaning system including: a cleaning device 1 and an annular cleaning structure;

the cleaning equipment 1 is connected with the annular cleaning structure through a pipeline.

FIG. 2 shows a schematic diagram of a toroidal cleaning architecture according to an embodiment of the present invention. As shown in fig. 2, the annular cleaning structure includes: a ring pipe 2, a plurality of first nozzles 3, and a plurality of second nozzles 4;

the annular pipe 2 is connected with the cleaning equipment 1 through a plurality of pipelines;

one side of the annular pipe 2 is circumferentially and uniformly connected with a plurality of first nozzles 3 and a plurality of second nozzles 4 in a rotating manner.

The plurality of first nozzles 3 and the plurality of second nozzles 4 are arranged at intervals in the axial and circumferential directions. The plurality of first nozzles 3 are connected to the cleaning apparatus 1 through a first pipe, and the plurality of second nozzles 4 are connected to the cleaning apparatus 1 through a second pipe. By means of the above arrangement, the washing system can spray two different flushing media to the engine simultaneously through the first nozzles 3 and the second nozzles 4. Certainly, the third nozzle, the fourth nozzle, etc. may also be designed according to actual requirements, which are not described herein again as long as the cleaning requirements are met. In some embodiments, the nozzle ports of the first plurality of nozzles 3 are in a first plane and the nozzle ports of the second plurality of nozzles 4 are in a second plane. In other embodiments, the nozzle ports of a portion of the first nozzles 3 and a portion of the second nozzles 4 are in a first plane and the nozzle ports of the remaining first nozzles 3 and the remaining second nozzles 4 are in a second plane. In some embodiments, the plurality of first nozzles 3 and second nozzles 4 are in the same plane (first plane or second plane). The first plane is parallel to the second plane but belongs to two different planes.

The aperture range of the first nozzle 3 and the second nozzle 4 is 0.8-1.6 mm, and the total number of the two nozzles is 8-18. The range of the aperture of the nozzle can be adjusted according to actual requirements, but should not be less than 0.8mm.

The pressure of the annular cleaning structure is 0.1-0.5 MPa, and the flow rate of the flushing medium is 6-15L/min.

The combination of the various solutions for the annular washing structure of a certain type of engine is shown in table 1.

TABLE 1 multiple protocol combination for annular cleaning configuration

Wherein, the spray angle refers to the included angle between the water column sprayed by the nozzle and the axis of the engine.

Table 2 lists the relevant parameter settings and test results for the same flushing medium desalting scheme for a certain type of engine. The technical scheme of cold-running salt-attaching and cold-running desalting treatment is adopted, water is used as a flushing medium, and the ports of the first nozzle 3 and the second nozzle 4 are in the same plane (the number of the two nozzles is the same).

TABLE 2 washing structure scheme and test results for certain type of engine

The cleaning system is arranged at the inlet of the engine, can meet the flow limit value and the precision of the nozzle, has system regulation, and simultaneously meets the requirements of temperature, pressure limit value, system limit range and the like. The cleaning system can meet the requirements of simultaneously providing different detergents according to different cleaning requirements.

According to the engine flow passage desalting verification method and the cleaning system provided by the invention, through a multi-scheme combined desalting test with different parameters such as the aperture, the number, the distribution, the spray angle, the pressure, the flow of a flushing medium and the like of nozzles of an annular cleaning structure, the comparison and verification of the desalting effect are rapidly carried out, and the results are obtained:

1) The optimal cleaning nozzle aperture, number, distribution, spray angle and the like for desalting the blades of the engine runner;

2) The optimal pressure, medium and flow rate required by desalting flushing;

3) Optimal desalting soaking and rinsing time;

4) The cleaning system and the nozzle processing quality can be checked and controlled.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. An engine runner desalination verification method is characterized by comprising the following steps:

calibrating the engine;

carrying out salt attaching treatment on a compressor blade of the engine;

desalting the compressor blade after salt attachment;

determining the result of the desalting treatment.

2. The engine flowpath desalination verification method as claimed in claim 1, wherein the salt rejection process comprises a soaking salt rejection process and a cold running salt rejection process.

3. The engine runner desalination verification method of claim 2, wherein the cold running salt deposit comprises the following steps:

connecting and checking the cleaning system, and setting the pressure of the cleaning system, the flow of a flushing medium, the aperture of the nozzles and the circumferential arrangement number of the nozzles;

and in the cold running state of the engine, the rotary engine is carried for 2-5 min, and the saline solution is sucked.

4. The engine flowpath desalination verification method as claimed in claim 1, wherein the desalination process comprises a soak desalination process and a cold run desalination process.

5. The engine flow passage desalination verification method of claim 4, wherein the soaking desalination process comprises the following specific steps:

starting the engine to a ground slow-speed state, running for 3-5 min, adjusting the engine to an idle slow state, a 25% maximum continuous state, a 50% maximum continuous state and a 75% maximum continuous state, and respectively working for 3-5 min;

adjusting the engine to an idle slow state to work for 3-5 min, and operating the ground slow vehicle for 5-10 min, and stopping the vehicle;

after the engine is cooled, taking out the stator blade with the salt attached to the surface, putting the runner part of the stator blade into a container filled with deionized water, standing for 5-15 min, taking out, and measuring the concentration of the solution sodium chloride in the container;

and putting the soaked stator blade into the deionized water again, and stirring for 5-10 min.

6. The engine flowpath desalination verification method as claimed in claim 4, wherein the cold running desalination process comprises the following specific steps:

starting the engine to a ground slow vehicle state and running for 3-5 min, and adjusting the engine to idle slow, 25% maximum continuous, 50% maximum continuous and 75% maximum continuous states, and respectively working for 3-5 min;

adjusting the engine to an idle slow state to work for 3-5 min, and a ground slow vehicle state to work for 3-5 min, and stopping;

when the total temperature of the outlet of the gas turbine of the engine is lower than a set value, connecting and checking a cleaning system, and setting the pressure of the cleaning system, the flow of a flushing medium, the aperture of a nozzle and the circumferential arrangement number of the nozzles;

in the cold running state of the engine, the rotary engine is driven for 2-5 min, and a flushing medium is sucked;

after the cold running is finished, starting the engine to run for 5-10 min in a ground slow running state, and stopping the vehicle;

after the engine is cooled, taking out the stator blade with the surface attached with salt, putting the runner part of the stator blade into a container filled with deionized water, standing for 5-15 min, taking out, and measuring the concentration of the solution sodium chloride in the container;

and putting the soaked stator blade into the deionized water again, and stirring for 5-15 min.

7. The washing system according to the engine runner desalination verification method of any one of claims 1 to 6, comprising: a cleaning device (1) and an annular cleaning structure;

the cleaning equipment (1) is connected with the annular cleaning structure through a pipeline.

8. The cleaning system of claim 7, wherein the annular cleaning structure comprises: a ring tube (2), a plurality of first nozzles (3) and a plurality of second nozzles (4);

the annular pipe (2) is connected with the cleaning equipment (1) through a plurality of pipelines;

one side of the annular pipe (2) is circumferentially and uniformly connected with a plurality of first nozzles (3) and a plurality of second nozzles (4) in a rotating manner;

the first nozzle (3) and the second nozzle (4) are arranged at intervals in the axial direction and the circumferential direction.

9. A cleaning system according to claim 8, wherein the first nozzle (3) and the second nozzle (4) have a hole size in the range of 0.8-1.6 mm and a total number of 8-18.

10. The cleaning system of claim 7, wherein the annular cleaning structure has a pressure of 0.1 to 0.5MPa and a flow rate of 6 to 15L/min.

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