Gas turbine engine salt spray corrosion simulation system and operation method

Abstract

The invention discloses a gas turbine engine salt spray corrosion simulation system and an operation method. The gas turbine engine salt spray corrosion simulation system comprises an upper control system for sending a rotating speed signal of an intelligent flow type peristaltic pump, a signal transmitting unit for converting the signal, a lower control system for controlling the atomization speed, a liquid conveying unit for conveying a salt solution, an atomization unit for atomizing the salt solution and a power supply unit, when the atomization unit works, a salt solution and compressed air enter a titanium alloy corrosion-resistant precise atomization spray head from a liquid guide pipe and an air guide pipe respectively, and a gas-liquid mixed substance is sprayed out after being atomized through the spray head; the man-machine interaction assembly controls an intelligent flow type peristaltic pump in the infusion unit to be switched between a local control mode and a remote control mode and perform salt mist flow velocity calibration work. By means of the automatic atomization control method, the stability of high atomization concentration and the engine state following performance are achieved, and meanwhile the advantage of being easy to maintain is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbine engines, in particular to a gas turbine engine salt spray corrosion simulation system and an operating method. Background Art

[0002] At present, with the development of the times, higher and higher requirements are put forward for the stability and reliability of ship engines. The typical characteristics of the marine environment are high temperature, high humidity and high salt spray. Gas turbine engines that operate in the marine environment for a long time will have a large amount of corrosion inducers in the air, which will lead to a decrease in engine performance and reliability, greatly shortening the service life of the engine.

[0003] There is no complete automated salt spray corrosion simulation system and method for gas turbine engines in the prior art, and most of them are single atomization test processes.

[0004] Therefore, for gas turbine engines, a salt spray corrosion simulation system and method are studied to realize the automatic simulation of marine salt spray environment in a land environment, which is of great significance for further studying the influence of salt spray environment on the corrosion of gas turbine engines in different working stages, and the contamination of the flow part during the operation of gas turbines in the marine environment. Summary of the invention

[0005] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a gas turbine engine salt spray corrosion simulation system and operation method, so as to meet the test requirements and conveniently complete the test work of simulating the corrosion effects of the gas turbine engine at different working stages in the marine salt spray environment on land. The overall operation is convenient and the working reliability is good.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A gas turbine engine salt spray corrosion simulation system comprises an upper control system for sending a speed signal of an intelligent flow-type peristaltic pump, a signal transmitter unit for converting signals, a lower control system for controlling atomization speed, an infusion unit for conveying a salt solution, an atomization unit for atomizing the salt solution, and a power supply unit.

[0008] Its further technical solution is:

[0009] The upper control system is connected to the lower control system through a signal transmission unit. The upper control system converts the speed signal of the intelligent flow-type peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system.

[0010] The lower control system is connected to the upper control system, the human-machine interaction component and the infusion unit. The lower control system receives the control signal of the upper control system and sends the control signal to the infusion unit to adjust the corresponding speed of the intelligent flow-type peristaltic pump.

[0011] The human-computer interaction component is mainly composed of a touch screen, which can control the intelligent flow-type peristaltic pump in the infusion unit to switch between local control and remote control modes and calibrate the salt spray flow rate.

[0012] The infusion unit consists of a saline solution tank, an intelligent flow-type peristaltic pump, and a drainage tube. The intelligent flow-type peristaltic pump adjusts the corresponding speed according to the signal of the lower control system. The saline solution in the saline solution tank is led to the atomization unit through the drainage tube for atomization.

[0013] The atomization unit is composed of a titanium alloy corrosion-resistant precision atomization nozzle, a liquid inlet pipe, and an air inlet pipe. When the atomization unit is working, the salt solution and compressed air enter the titanium alloy corrosion-resistant precision atomization nozzle from the liquid inlet pipe and the air inlet pipe respectively, and the gas-liquid mixture is atomized through the nozzle and then sprayed out; the titanium alloy corrosion-resistant precision atomization nozzle is resistant to salt spray corrosion and, under a certain dry air pressure, can ensure that the salt spray particle size is 5-10μm, the spray angle is 30-35°, the effective spray distance is 0.6 meters, and the atomization speed is effectively maintained stable.

[0014] The power supply unit is respectively connected with the upper control system, the signal transmission unit, the lower control system, the human-machine interaction component, the infusion unit and the atomization unit.

[0015] An operating method of a gas turbine engine salt spray corrosion simulation system includes the following operating procedures:

[0016] Step 1: Salt solution ratio;

[0017] First, the humidification amount required for the test needs to be calculated, then the solid mass of salt required for the test needs to be calculated, and finally the salt solution is prepared according to the requirements of the national military standard;

[0018] Step 2: Salt spray concentration calibration;

[0019] According to the content of ions in the sampled solution, the salt spray concentration of the test environment is determined, and the atomization speed of the salt spray device is corrected according to the measurement results;

[0020] Step 3: Salt spray flow rate calibration;

[0021] Calibrate the salt spray flow rate through the human-computer interaction component;

[0022] Step 4: Atomization of salt solution;

[0023] The upper control system sends a speed signal to the lower control system, and the lower control system controls the speed of the intelligent flow-type peristaltic pump in the infusion unit to ensure the delivery speed of the saline solution. The saline solution is finally sprayed out of the atomizing gas by the titanium alloy corrosion-resistant precision atomizing nozzle;

[0024] Step 5: Automatic atomization concentration;

[0025] During the test, the atomization speed is dynamically adjusted to ensure that the salt spray concentration always meets the salt spray environment required by the test.

[0026] Inspect and record the corrosion condition of the engine's external surface.

[0027] In the first step, before the test, the humidification amount required for the test is calculated according to the ambient temperature and relative humidity, and then the solid mass of the salt required for the test is calculated according to the engine intake flow and humidification amount; at the same time, in the first step, the standard salt solution needs to be configured according to the salt solution ratio requirements in the national military standard salt spray test. The configured salt solution should be fully allowed to stand and the configured salt solution should be placed in the salt solution tank according to the test requirements;

[0028] In the second step, the actual concentration measurement should be carried out by chromatographic analysis, by measuring and testing the concentrations of chloride ions and sodium ions, and finally verifying the salt spray concentration in the environment based on the concentrations of the two ions;

[0029] In the third step, the salt spray concentration of the engine inlet air section and the vortex outlet air section should be measured; before the formal salt spray test, the salt spray flow rate of the salt spray test equipment needs to be calibrated. First, the amount of salt solution in each test stage is collected at the same time to obtain the flow rate in relative time, and the flow rate is corrected in the human-computer interaction component according to the measurement results;

[0030] In the fourth step, the upper control system converts the speed signal of the intelligent flow peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system. The lower control system controls the intelligent flow peristaltic pump to transport the salt solution required for each test stage, and transports the solution to the titanium alloy corrosion-resistant precision atomizing nozzle for atomization. After the salt solution is atomized, it is transported to the air inlet of the gas turbine with the help of the intake air flow;

[0031] In the fifth step, the upper control system monitors the different test stages in real time, intelligently calculates the atomization speed of the intelligent flow-type peristaltic pump according to the atomization concentration requirements of different test stages, and sends the atomization speed to the lower control system through a multi-threaded data transmission and reception method. The lower control system controls the intelligent flow-type peristaltic pump to continuously transport the salt solution in the salt solution reservoir through the water pipe to the titanium alloy corrosion-resistant precision atomization nozzle for stable atomization.

[0032] In the sixth step, the multi-threaded data receiving and sending method can ensure the stability of data collection, transmission and storage in a complex environment. The performance data collection, automatic control of atomization speed and data storage program are multi-threaded redundant control logic, which do not affect each other, ensuring the stable operation of the gas turbine engine salt spray corrosion simulation system.

[0033] The beneficial effects of the present invention are as follows:

[0034] The system of the present invention has a compact and reasonable structure and is easy to operate. It achieves high stability of atomization concentration and engine state followability through an automated atomization control method, and also has the advantage of being easy to maintain.

[0035] The present invention can realize automatic simulation of marine salt spray environment in a land environment, which is of great significance for further studying the corrosion effect of salt spray environment on gas turbine wheels, pollution of the flow part of gas turbines during operation in marine environments, and other issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a system structure diagram of the present invention.

[0037] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0039] like Figure 1 As shown, the gas turbine engine salt spray corrosion simulation system of this embodiment includes an upper control system for sending a speed signal of an intelligent flow-type peristaltic pump, a signal transmission unit for converting signals, a lower control system for controlling atomization speed, an infusion unit for conveying salt solution, an atomization unit for atomizing the salt solution, and a power supply unit.

[0040] The upper control system is connected to the lower control system through a signal transmission unit. The upper control system converts the speed signal of the intelligent flow-type peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system.

[0041] The lower control system is connected to the upper control system, the human-machine interaction component and the infusion unit. The lower control system receives the control signal of the upper control system and sends the control signal to the infusion unit to adjust the corresponding speed of the intelligent flow-type peristaltic pump.

[0042] The human-computer interaction component is mainly composed of a touch screen, which can control the intelligent flow-type peristaltic pump in the infusion unit to switch between local control and remote control modes and calibrate the salt spray flow rate.

[0043] The infusion unit consists of a saline solution tank, an intelligent flow-type peristaltic pump, and a drainage tube. The intelligent flow-type peristaltic pump adjusts the corresponding speed according to the signal of the lower control system. The saline solution in the saline solution tank is led to the atomization unit through the drainage tube for atomization.

[0044] The atomization unit is composed of a titanium alloy corrosion-resistant precision atomization nozzle, a liquid inlet pipe, and an air inlet pipe. When the atomization unit is working, the salt solution and compressed air enter the titanium alloy corrosion-resistant precision atomization nozzle from the liquid inlet pipe and the air inlet pipe respectively, and the gas-liquid mixture is atomized through the nozzle and then sprayed out; the titanium alloy corrosion-resistant precision atomization nozzle is resistant to salt spray corrosion and, under a certain dry air pressure, can ensure that the salt spray particle size is 5-10μm, the spray angle is 30-35°, the effective spray distance is 0.6 meters, and the atomization speed is effectively maintained stable.

[0045] The power supply unit is respectively connected with the upper control system, the signal transmission unit, the lower control system, the human-machine interaction component, the infusion unit and the atomization unit.

[0046] The specific structure of a gas turbine engine salt spray corrosion simulation system of this embodiment is as follows:

[0047] It includes an upper control system for sending a speed signal of an intelligent flow-type peristaltic pump, a signal transmission unit for converting signals, a lower control system for controlling atomization speed, an infusion unit for conveying saline solution, an atomization unit for atomizing the saline solution, and a power supply unit.

[0048] Among them, the upper control system is connected to the lower control system through a signal transmission unit. The upper control system converts the speed signal of the intelligent flow-type peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system.

[0049] Among them, the lower control system is connected to the upper control system, the human-computer interaction component and the infusion unit. The lower control system receives the control signal of the upper control system and sends the control signal to the infusion unit to adjust the corresponding speed of the intelligent flow-type peristaltic pump.

[0050] Among them, the human-computer interaction component is mainly composed of a touch screen, which can mainly control the intelligent flow-type peristaltic pump in the infusion unit to switch between local control and remote control modes and calibrate the salt spray flow rate.

[0051] Among them, the infusion unit consists of a saline solution tank, an intelligent flow-type peristaltic pump, and a drainage tube. The intelligent flow-type peristaltic pump adjusts the corresponding speed according to the signal of the lower control system. The saline solution in the saline solution tank is led to the atomization unit through the drainage tube for atomization.

[0052] Among them, the atomization unit is composed of a titanium alloy corrosion-resistant precision atomization nozzle, a liquid inlet pipe, and an air inlet pipe. When the atomization unit is working, the salt solution and compressed air enter the titanium alloy corrosion-resistant precision atomization nozzle from the liquid inlet pipe and the air inlet pipe respectively, and the gas-liquid mixture is atomized through the nozzle and then sprayed out; the titanium alloy corrosion-resistant precision atomization nozzle is resistant to salt spray corrosion and, under a certain dry air pressure, can ensure that the salt spray particle size is 5-10μm, the spray angle is 30-35°, the effective spray distance is 0.6 meters, and the atomization speed is effectively maintained stable.

[0053] The power supply unit is connected to the upper control system, signal transmission unit, lower control system, human-machine interaction component, infusion unit and atomization unit respectively. The system achieves high atomization concentration stability and engine status followability through the method of automatic atomization control, and also has the advantage of easy maintenance.

[0054] In the actual working process, the operation is completed through the following steps:

[0055] (I) Salt solution proportioning steps: First, calculate the humidification amount required for the test based on the ambient temperature and relative humidity, and then calculate the solid mass of salt required for the test based on the engine intake flow and humidification amount; then, the standard salt solution must be prepared according to the salt solution proportioning requirements in the national military standard salt spray test, and the prepared salt solution should be fully allowed to stand; finally, the prepared salt solution is placed in the salt solution tank according to the test requirements.

[0056] (II) Salt spray concentration calibration steps: The actual concentration measurement should be carried out by chromatographic analysis, by measuring and testing the chloride ion and sodium ion concentrations, and finally verifying the salt spray concentration in the environment based on the two ion concentrations, and correcting the atomization speed of the salt spray device based on the measurement results. The measurement position should include the engine inlet air section and the vortex outlet air section.

[0057] (III) Salt spray flow rate calibration steps: First, the salt spray flow rate of the salt spray test equipment needs to be calibrated. At the same time, the amount of salt solution in each test stage is collected to obtain the flow rate in relative time, and the flow rate is corrected in the human-computer interaction component based on the measurement results.

[0058] (IV) Salt solution atomization step: The upper control system converts the speed signal of the intelligent flow-type peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system. The lower control system controls the intelligent flow-type peristaltic pump to transport the salt solution required for each test stage, and transports the solution to the titanium alloy corrosion-resistant precision atomizing nozzle for atomization. After the salt solution is atomized, it is transported to the air inlet of the gas turbine with the help of the intake air flow.

[0059] (V) Automatic control step of atomization concentration: In the automatic control step of atomization concentration, the upper control system monitors the test status of different test stages in real time, intelligently calculates the atomization speed of the intelligent flow-type peristaltic pump according to the atomization concentration requirements of different test stages, and sends the atomization speed to the lower control system through a multi-threaded data receiving and sending method. The lower control system controls the intelligent flow-type peristaltic pump to continuously transport the salt solution in the salt solution reservoir through the water pipe to the titanium alloy corrosion-resistant precision atomization nozzle for stable atomization.

[0060] (VI) Performance parameter recording steps: During the test process, the upper control system stores the engine performance and test environment parameters through a multi-threaded data receiving and sending method.

[0061] (VII) Internal corrosion inspection steps: After the test, inspect and record the corrosion condition of the engine's outer surface.

[0062] The present invention is provided with an upper control system for sending a speed signal of an intelligent flow-type peristaltic pump, a signal transmission unit for converting signals, a lower control system for controlling atomization speed, an infusion unit for conveying a saline solution, an atomization unit for atomizing the saline solution, and a power supply unit. The overall components work in coordination with each other, and through an automated atomization control method, the stability of a higher atomization concentration and the followability of the engine state are achieved, and the system also has the advantage of being easy to maintain.

[0063] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A gas turbine engine salt spray corrosion simulation system, characterized in that: It includes an upper control system for sending a speed signal of an intelligent flow-type peristaltic pump, a signal transmission unit for converting signals, a lower control system for controlling atomization speed, an infusion unit for conveying saline solution, an atomization unit for atomizing the saline solution, and a power supply unit.

2. A gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The upper control system is connected to the lower control system through a signal transmission unit. The upper control system converts the speed signal of the intelligent flow-type peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system.

3. A gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The lower control system is connected to the upper control system, the human-machine interaction component and the infusion unit. The lower control system receives the control signal of the upper control system and sends the control signal to the infusion unit to adjust the corresponding speed of the intelligent flow-type peristaltic pump.

4. A gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The human-computer interaction component is mainly composed of a touch screen, which can control the intelligent flow-type peristaltic pump in the infusion unit to switch between local control and remote control modes and calibrate the salt spray flow rate.

5. A gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The infusion unit consists of a saline solution tank, an intelligent flow-type peristaltic pump, and a drainage tube. The intelligent flow-type peristaltic pump adjusts the corresponding speed according to the signal of the lower control system. The saline solution in the saline solution tank is led to the atomization unit through the drainage tube for atomization.

6. A gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The atomization unit is composed of a titanium alloy corrosion-resistant precision atomization nozzle, a liquid inlet pipe, and an air inlet pipe. When the atomization unit is working, the salt solution and compressed air enter the titanium alloy corrosion-resistant precision atomization nozzle from the liquid inlet pipe and the air inlet pipe respectively, and the gas-liquid mixture is atomized through the nozzle and then sprayed out; the titanium alloy corrosion-resistant precision atomization nozzle is resistant to salt spray corrosion and, under a certain dry air pressure, can ensure that the salt spray particle size is 5-10μm, the spray angle is 30-35°, the effective spray distance is 0.6 meters, and the atomization speed is effectively maintained stable.

7. A gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The power supply unit is respectively connected with the upper control system, the signal transmission unit, the lower control system, the human-machine interaction component, the infusion unit and the atomization unit.

8. A method for operating a gas turbine engine salt spray corrosion simulation system as claimed in claim 1, characterized in that: The following operation procedures are included: Step 1: Salt solution ratio; First, the humidification amount required for the test needs to be calculated, then the solid mass of salt required for the test needs to be calculated, and finally the salt solution is prepared according to the requirements of the national military standard; Step 2: Salt spray concentration calibration; According to the content of ions in the sampled solution, the salt spray concentration of the test environment is determined, and the atomization speed of the salt spray device is corrected according to the measurement results; Step 3: Salt spray flow rate calibration; Calibrate the salt spray flow rate through the human-computer interaction component; Step 4: Atomization of salt solution; The upper control system sends a speed signal to the lower control system, and the lower control system controls the speed of the intelligent flow-type peristaltic pump in the infusion unit to ensure the delivery speed of the saline solution. The saline solution is finally sprayed out of the atomizing gas by the titanium alloy corrosion-resistant precision atomizing nozzle; Step 5: Automatic atomization concentration; During the test, the atomization speed is dynamically adjusted to ensure that the salt spray concentration always meets the salt spray environment required by the test; Step 6: Performance parameter recording; During the test, the upper control system stores the engine performance and test environment parameters through a multi-threaded data transmission and reception method; Step 7: Internal corrosion inspection: After the test, inspect and record the corrosion condition of the engine's outer surface.

9. The method for operating the gas turbine engine salt spray corrosion simulation system according to claim 8, characterized in that: In the first step, before the test, the humidification amount required for the test is calculated according to the ambient temperature and relative humidity, and then the solid mass of the salt required for the test is calculated according to the engine intake flow and humidification amount; at the same time, in the first step, the standard salt solution needs to be configured according to the salt solution ratio requirements in the national military standard salt spray test. The configured salt solution should be fully allowed to stand and the configured salt solution should be placed in the salt solution tank according to the test requirements; In the second step, the actual concentration measurement should be carried out by chromatographic analysis, by measuring and testing the concentrations of chloride ions and sodium ions, and finally verifying the salt spray concentration in the environment based on the concentrations of the two ions; In the third step, the salt spray concentration of the engine inlet air section and the vortex outlet air section should be measured; before the formal salt spray test, the salt spray flow rate of the salt spray test equipment needs to be calibrated. First, the amount of salt solution in each test stage is collected at the same time to obtain the flow rate in relative time, and the flow rate is corrected in the human-computer interaction component according to the measurement results; In the fourth step, the upper control system converts the speed signal of the intelligent flow peristaltic pump corresponding to each test stage into a standard control signal through the signal transmission unit and transmits it to the lower control system. The lower control system controls the intelligent flow peristaltic pump to transport the salt solution required for each test stage, and transports the solution to the titanium alloy corrosion-resistant precision atomizing nozzle for atomization. After the salt solution is atomized, it is transported to the air inlet of the gas turbine with the help of the intake air flow; In the fifth step, the upper control system monitors the different test stages in real time, intelligently calculates the atomization speed of the intelligent flow-type peristaltic pump according to the atomization concentration requirements of different test stages, and sends the atomization speed to the lower control system through a multi-threaded data transmission and reception method. The lower control system controls the intelligent flow-type peristaltic pump to continuously transport the salt solution in the salt solution reservoir through the water pipe to the titanium alloy corrosion-resistant precision atomization nozzle for stable atomization.

10. The method for operating the gas turbine engine salt spray corrosion simulation system according to claim 8, characterized in that: In the sixth step, the multi-threaded data receiving and sending method can ensure the stability of data collection, transmission and storage in a complex environment. The performance data collection, automatic control of atomization speed and data storage program are multi-threaded redundant control logic, which do not affect each other, ensuring the stable operation of the gas turbine engine salt spray corrosion simulation system.

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