Fuel engine material corrosion test system

Abstract

The invention provides a fuel engine material corrosion test system. The fuel engine material corrosion test system comprises an engine, a pressure stabilizing system and at least one test equipment module, the test equipment module further comprises a first temperature control device, a material sample block and a liquid corrosion medium adder; the pressure stabilizing system is used for stabilizing a test environment; the first temperature control device is used for controlling the temperature in the test equipment module; the liquid corrosion medium adder is used for adding the liquid corrosion medium to the material sample block; wherein the corrosive gas discharged by the engine is led to the material sample block. According to the fuel engine material corrosion testing device, the whole testing environment is finally constructed through gas exhausted by an engine, control over external environment parameters and addition of a corrosion medium, and the technical problem that in the prior art, equipment for testing fuel engine material corrosion is lacked is solved.

Description

Technical field:

[0001] The invention relates to the field of material testing, in particular to a fuel engine material corrosion testing system. Background technology:

[0002] Emerging low-carbon and zero-carbon fuels such as methanol, ammonia, and natural gas are gradually being used in the engine field, and have broad development prospects. Low-carbon and zero-carbon fuels will produce corrosive intermediates during combustion, and will chemically react with engine materials at all times during engine operation, destroying the surface state of parts and components and reducing the structural reliability of parts and components, which will have a great impact on the development of low-carbon and zero-carbon engines.

[0003] As a relatively mature material corrosion resistance testing scheme, test methods such as material coupon corrosion test and immersion test are widely used in the material field. In the corrosion test, the test material is made into a sample of a certain size and placed in a liquid or gas environment with a specific temperature, pressure and specific composition. After a period of time, the weight change, surface morphology change and metallographic change of the sample are detected, and the surface corrosion product analysis is carried out to evaluate the corrosion resistance of the material.

[0004] However, this corrosion test method has certain limitations: First, the components of the corrosion test environment are determined based on the engine exhaust composition and simulation calculation results during the test. Limited by the detection method and simulation method, the corrosion test environment is not completely consistent with the actual working environment of the test material, and there are even large differences, which makes the corrosion test results questionable. Second, the specifications of the corrosion test equipment limit the types of test materials and the number of samples in one test. When faced with a variety of test materials and corresponding material corrosion resistance schemes in the same environment, multiple tests need to be carried out, with high test costs and long test cycles, which is not conducive to material selection in the engine design process. Third, after the corrosion test is completed and the material selection of components is completed, it is usually necessary to carry out running tests of the test materials again on single-cylinder or multi-cylinder engines to verify the corrosion resistance of the test materials or material corrosion resistance schemes. There are repeated tests and verifications in the design process, which extends the engine design and verification cycle, which is not conducive to the research and development and product iteration of new engines.

[0005] Therefore, there is an urgent need for a fuel engine material corrosion test system, which helps to solve the technical problem of the lack of a device for testing the corrosion of fuel engine materials in the prior art. Summary of the invention:

[0006] In one embodiment, the present invention provides a fuel engine material corrosion test system, which uses the exhaust gas from the engine, controls external environmental parameters, and adds corrosive media to ultimately construct an overall test environment, helping to solve the technical problem of the prior art lacking a device for testing the corrosion of fuel engine materials.

[0007] The fuel engine material corrosion test system includes an engine and a pressure stabilization system, and at least one test equipment module;

[0008] The test equipment module further includes a first temperature control device and a material sample block, and a liquid corrosive medium adder;

[0009] The voltage stabilizing system is used to stabilize the test environment;

[0010] The first temperature control device is used to control the ambient temperature;

[0011] The liquid corrosive medium adder is used to add the liquid corrosive medium to the material sample block;

[0012] Wherein, the corrosive gas discharged by the engine is directed toward the material sample block.

[0013] In one embodiment, the voltage stabilization system includes a second temperature control device and a voltage stabilization device, and a gaseous corrosive medium adder;

[0014] The gaseous corrosive medium adder is used to add the gaseous corrosive medium to the material sample block.

[0015] In one embodiment, the fuel engine material corrosion test system further includes an exhaust gas recovery device;

[0016] The waste gas recovery device is used to recover the waste gas passing through the material sample block.

[0017] In one embodiment, the fuel engine material corrosion test system further includes a host computer;

[0018] The host computer is used to control the engine, the voltage stabilization system, and the test equipment module.

[0019] In one embodiment, the fuel engine material corrosion test system further includes an insulating sheathed pipeline;

[0020] The insulating sheathed pipeline is used to connect the engine to the at least one test equipment module.

[0021] In one embodiment, the fuel engine material corrosion test system further includes a host computer controller;

[0022] The host computer controller is used to control the voltage stabilization system and the test equipment module so that the boundary conditions of the corrosion test environment in the test equipment module are consistent with the working environment of the test material.

[0023] In one embodiment, when the engine is running, temperature sensors, pressure sensors and other sensor devices are arranged inside the engine to monitor the temperature and pressure status of the corrosive medium inside the engine in real time, and transmit the status signal to the host computer.

[0024] In one embodiment, the host computer monitors the temperature and pressure of the medium in the combustion chamber according to the sensor, and transmits the temperature and pressure values ​​to the pressure stabilization system.

[0025] In one embodiment, material samples made of cylinder head, cylinder liner and piston materials are suspended and placed in each module;

[0026] The surface of the material sample block is consistent with the shape of the working surface of the component; it is exposed to the corrosive medium;

[0027] The test surfaces of a portion of the test blocks have one or more corrosion resistant coatings.

[0028] In one embodiment, after a predetermined period of time, the corrosion test ends, the exhaust gas recovery device is turned on, and the gaseous corrosive medium in the test equipment module is completely recovered; when all the material samples in the test equipment module are recovered, the temperature control device is turned on, and the remaining liquid corrosive medium is completely gasified and completely recovered by the exhaust gas recovery device. Description of the drawings:

[0029] Figure 1 It is a schematic diagram of the architecture of a fuel engine material corrosion test system in one embodiment of the present invention.

[0030] Reference numerals:

[0031] Engine 1

[0032] Voltage stabilization system 2

[0033] Temperature control device 21

[0034] Voltage stabilizer 22

[0035] Gaseous corrosive medium feeder 23

[0036] Test equipment module 3

[0037] Temperature control device 31

[0038] Material sample 32

[0039] Liquid corrosive medium feeder 33

[0040] Exhaust gas recovery device 4

[0041] Host computer 5

[0042] Sensor 6

[0043] Host controller 7

[0044] Insulation coated pipe 8 Specific embodiment:

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0047] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0048] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0049] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0050] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0051] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0052] Figure 1 FIG. 1 is a schematic diagram of the structure of a fuel engine material corrosion test system according to an embodiment of the present invention. Figure 1As shown, in one embodiment, the present invention provides a fuel engine material corrosion test system, the fuel engine material corrosion test system comprising an engine 1 and a pressure stabilizing system 2, and at least one test equipment module 3;

[0053] Voltage stabilization system 2, used to stabilize the test environment;

[0054] The test equipment module 3 further includes a first temperature control device 31, a material sample block 32, and a liquid corrosive medium adder 33;

[0055] A first temperature control device 31, used to control the ambient temperature;

[0056] The liquid corrosive medium adder 33 is used to add the liquid corrosive medium to the material sample 32 ; wherein the corrosive gas discharged by the engine 1 flows to the material sample 32 .

[0057] In this embodiment, a specific implementation of a fuel engine material corrosion test system is provided. The engine 1 is used to simulate an exhaust source, and the material sample block 32 of the test equipment module 3 is the test material.

[0058] In one embodiment, the voltage stabilization system includes a second temperature control device 21 and a voltage stabilization device 22, and a gaseous corrosive medium adder 23;

[0059] The gaseous corrosive medium adder 23 is used to add the gaseous corrosive medium to the material sample.

[0060] In one embodiment, the fuel engine material corrosion test system further includes an exhaust gas recovery device 4;

[0061] The waste gas recovery device 4 is used to recover the waste gas passing through the material sample block.

[0062] In one embodiment, the fuel engine material corrosion test system is characterized in that the fuel engine material corrosion test system further includes a host computer 5;

[0063] The host computer 5 is used to control the engine 1 and the voltage stabilization system 2, as well as the test equipment module.

[0064] In one embodiment, the fuel engine material corrosion test system further comprises an insulating sheathed pipeline 8;

[0065] The insulating sheathed pipeline 8 is used to connect the engine 1 to the at least one test equipment module.

[0066] In one embodiment, the fuel engine material corrosion test system further includes a host computer controller 7;

[0067] The upper computer controller 7 is used to control the voltage stabilizing system 2 and the test equipment module 3 so that the boundary conditions of the corrosion test environment in the test equipment module 3 are consistent with the working environment of the test material.

[0068] In one embodiment, when the engine 1 is running, a temperature sensor, a pressure sensor and other sensor devices 6 are arranged inside the engine 1 to monitor the temperature and pressure state of the corrosive medium inside the engine in real time, and transmit the state signal to the host computer 5.

[0069] In one embodiment, a material sample 32 made of a cylinder head, a cylinder liner and a piston material is suspended in each module. In addition, the material sample 32 can also be suspended or immersed in a liquid corrosive medium. In addition, in addition to the cylinder head, the cylinder liner and the piston, other materials such as bearings, bushings, etc., which are engine component materials with corrosion risks, can also be used.

[0070] The surface of the material sample block 32 is consistent with the shape of the working surface of the component; it is exposed to the corrosive medium;

[0071] The test surfaces of a portion of the test blocks have one or more corrosion resistant coatings.

[0072] In one embodiment, after a predetermined period of time, the corrosion test ends, the waste gas recovery device 4 is opened, and the gaseous corrosive medium in the test equipment module 3 is completely recovered; when the material sample blocks 32 in the test equipment module 3 are completely recovered, the temperature control device 31 is opened, and the remaining liquid corrosive medium is completely gasified and completely recovered by the waste gas recovery device 4.

[0073] Beneficial effects:

[0074] The present invention aims to solve the problem that material corrosion tests cannot accurately simulate the corrosion environment and the test conditions are limited; it proposes a low-carbon zero-carbon fuel engine material corrosion test system; by combining with the engine bench test; the test system can provide a corrosion test environment consistent with the actual working environment of the material; and through a series of monitoring and control measures; the boundary conditions in the test system can always be maintained at the expected level. The invention has a simple structure; the changes to the existing test methods and benches are relatively small; the technical solutions and innovations are:

[0075] The corrosive medium in the corrosion test system is provided by the engine; after obtaining a sufficient amount of the medium, the engine can stop running or perform other test tasks. According to the application scenario of the test material; select the corresponding environment of the engine; connect the engine environment with the test equipment of the corrosion test system through adiabatic coated pipelines, etc.; and obtain the corrosive medium in real time. During the test, the engine can operate under a single operating condition; it can also operate under variable operating conditions. The voltage stabilization system has a storage function; after collecting a sufficient amount of corrosive medium, the voltage stabilization system is disconnected from the engine; the engine can stop running or perform other test tasks; without affecting the corrosive medium in the voltage stabilization system;

[0076] The corrosion test system is equipped with auxiliary equipment such as temperature control device, voltage stabilizing device, exhaust gas recovery device, gas / liquid corrosive medium adding device, etc.; it can keep the temperature and pressure of the gaseous corrosive medium in the corrosion test environment at the expected level; it can recover, store or process the original medium when the corrosive medium changes. At the same time, it can add gaseous or liquid corrosive medium to the specific test environment in a timely and quantitative manner; control the medium composition and concentration; and realize the corrosion acceleration test function;

[0077] Temperature sensors, pressure sensors and other detection systems are added to the engine and connected to the host computer. According to the material working environment boundary conditions in the engine, the host computer controls the auxiliary equipment such as the heating device and the voltage stabilizing device of the corrosion test system in real time to make the test boundary conditions in the test system consistent with the material working environment boundary conditions or the specific corrosive medium environment boundary conditions required for the test.

[0078] The test equipment of the corrosion test system adopts a modular design; the test space size is adjusted according to the type of test material, the number of schemes and the specifications of the sample blocks; and one test can meet the testing needs of multiple material samples.

[0079] In view of the above problems, there is an urgent need for a marine universal coupling immersion performance test system with strong environmental adaptability, high test efficiency and strong reliability to perform performance tests on marine universal couplings and provide more realistic test data for the research and development of ship propulsion systems.

[0080] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A fuel engine material corrosion test system, characterized in that: The fuel engine material corrosion test system comprises: an engine (1); A voltage stabilization system (2) for stabilizing the test environment; At least one test equipment module (3), the test equipment module (3) further comprising: a first temperature control device (31), used for controlling the ambient temperature; a material sample (32); A liquid corrosive medium adder (33) is used to add the liquid corrosive medium to the material sample (32); wherein the corrosive gas discharged by the engine (1) is directed to the material sample (32).

2. The fuel engine material corrosion test system according to claim 1, characterized in that: The voltage stabilization system comprises: a second temperature control device (21); a voltage stabilizing device (22); A gaseous corrosive medium adder (23) is used to add gaseous corrosive medium to the material sample.

3. The fuel engine material corrosion test system according to claim 2, characterized in that: The fuel engine material corrosion test system also includes: A waste gas recovery device (4) is used to recover the waste gas passing through the material sample block.

4. The fuel engine material corrosion test system according to claim 3, characterized in that: The fuel engine material corrosion test system also includes: A host computer (5) is used to control the engine (1), the voltage stabilization system (2), and the test equipment module.

5. The fuel engine material corrosion test system according to claim 4, characterized in that: The fuel engine material corrosion test system also includes: An insulating sheathed pipeline (8) is used to connect the engine (1) to the at least one test equipment module.

6. The fuel engine material corrosion test system according to claim 5, characterized in that: The fuel engine material corrosion test system also includes: A host computer controller (7) is used to control the voltage stabilization system (2) and the test equipment module (3) so that the boundary conditions of the corrosion test environment in the test equipment module (3) are consistent with the working environment of the test material.

7. The fuel engine material corrosion test system according to claim 6, characterized in that: When the engine (1) is running, temperature sensors, pressure sensors and other sensor devices (6) are arranged inside the engine (1); the temperature and pressure state of the corrosive medium inside the engine are monitored in real time; and the state signal is transmitted to the host computer (5).

8. The fuel engine material corrosion test system according to claim 7, characterized in that: The host computer (5) monitors the temperature and pressure of the medium in the combustion chamber according to the sensor (6), and transmits the temperature and pressure values ​​to the pressure stabilization system (2).

9. The fuel engine material corrosion test system according to claim 8, characterized in that: Material samples (32) made of cylinder head, cylinder liner and piston materials are suspended and placed in each module; The surface of the material sample block (32) is consistent with the shape of the working surface of the component; Exposure to corrosive media; The test surfaces of a portion of the test blocks have one or more corrosion resistant coatings.

10. The fuel engine material corrosion test system according to claim 9, characterized in that: After a predetermined period of time, the corrosion test ends; the waste gas recovery device (4) is opened; the gaseous corrosive medium in the test equipment module (3) is completely recovered; when the material sample blocks (32) in the test equipment module (3) are completely recovered; the temperature control device (31) is opened; the remaining liquid corrosive medium is completely gasified; and is completely recovered by the waste gas recovery device (4).

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