The invention discloses a high-speed and high-temperature abradable testing machine of a tightly-closed coating and an experimental method. The high-speed and high-temperature abradable testing machine comprises a wheel disc, a flame heating device and a coating test sample tool. A simulating blade is arranged at the edge part of the wheel disc and the wheel disc is connected with a main shaft accelerating device. The coating test sample tool is connected with a feeding device; and a clamping end of the test sample tool is over against the edge part of the wheel disc. A flame jetting end of the flame heating device points to the clamping end of the coating test sample tool. The high-speed and high-temperature abradable testing machine can simulate the abrasion in a real work condition and can be better used for research on an abrasion mechanism in a tightly-closed material under high-temperature and high-speed work conditions; and meanwhile, the high-speed and high-temperature abradable testing machine can be used for testing the abradable performance of various types of the tightly-closed materials, such as tightly-closed materials including a graphite-based tightly-closed coating, a metal-based tightly-closed coating, a ceramic-based tightly-closed coating and the like.

High-speed and high-temperature abradable testing machine of tightly-closed coating and experimental method

The present invention discloses a multifunctional high-temperature high-speed friction and wear testing machine and a method, including a main shaft power system, a radial micro-feed system, an axial micro-feed system, a flame heating system and a control system. The main shaft power system includes a wheel disc. The edge part of the wheel disc is provided with a simulation blade. The main shaft power system can achieve a driving wheel disc to drive the simulation blade to make high-speed rotation with a speed of 350 m/s through a belt speed increase. The simulation blade at the edge part of the wheel disc can scratch radial feed test pieces. A flame heating device is used for heating the test pieces to reach actual operating temperature of the test pieces. Abradable performance of various sealing materials can be tested and engine titanium fire prevention experiments can be performed. The radial micro-feed system can drive bulk, annular and pin-shaped test pieces for axial feeding to realize ultra-high speed friction with the wheel disc. High speed friction and wear working conditions of train tracks and grinders can be simulated, and the research on friction and wear mechanisms is conducted.

Multifunctional high-temperature high-speed friction and wear testing machine and method

The invention especially relates to a detection and evaluation method for the abradability of a seal coating, belonging to the technical field of aeroengines. The detection and evaluation method is applicable to determination of the abradability of thermally-sprayed abradable seal coatings. The method comprises the following steps: preparation of a coating; measurement and weighing; installation of blade samples; calibration of zero position; setting of test parameters; abrasion testing; and result analysis and evaluation. The detection and evaluation method provided by the invention is employed for studying the frictional wearing behaviors of three low-and-medium-temperature seal coatings, i.e., an AHB (aluminum/boron nitride) coating, a Metco601 (aluminum-silicon polybenzoate) and a Metco 307 (nickel graphite) coating, and matching pairs; and criteria are formulated for determination of the abradability of abradable seal coatings, including three qualitative criteria and four quantitative criteria, wherein the three qualitative criteria are composed of abrading force, the morphology and composition of the surfaces of abrasion scratches, and the morphology and composition of the cross sections of the abrasion scratches, and the four quantitative criteria are composed of a blade height abrasion ratio, a blade coating mass wear ratio, an abrasion scratch length ratio and an adhesion ratio.

Detection and evaluation method for abradability of seal coating

The invention relates to the field of sealed coatings and materials and particularly relates to a method for evaluating the scraping performance of a sealed coating and a material. The method comprises the following steps: simulating a scraping condition on a high-speed high-temperature scraping abrasion testing machine under a simulated condition; establishing an abrasion mechanism pattern; and judging and optimizing the coating and the material which are suitable for corresponding service conditions. According to an experimental method for evaluating the scraping performance of the sealed coating and the material, scraping experiments under high-speed and high-temperature conditions are simulated aiming at a service environment so as to obtain testing data of a specific friction sealing pair under the influences of conditions including a rotary speed, a temperature, a scraping manner, a scraping speed, a depth and the like; proper engineering criteria can be established according to a transformation condition of a friction and abrasion mechanism and can be suitable for evaluating the scraping performance of the sealed coating and the material; the method particularly has engineering meanings on the evaluation of scraping and abrasion behaviors of a friction pair of a turbojet engine gas circuit seal and the like and can provide technical guidance to high-speed and high-temperature tribology performance researches and novel material researches of the material.

Method for evaluating scraping performance of sealed coating and material

The invention provides an infrared-temperature-measurement-principle-based temperature measuring system in a titanium ignition test, and belongs to a temperature measuring system in a ignition test. The infrared-temperature-measurement-principle-based temperature measuring system in a titanium ignition test includes a titanium ignition system, an infrared temperature measurement system, a thermocouple contrast system and a data processing system, wherein the titanium ignition system includes an acetylene oxygen flame igniter, a support for fixing a titanium sheet, and a combustion cavity with a protection function and an optical window; the infrared temperature measurement system includes an optical system, a fiber and a data processing module; and the thermocouple contrast system fixes thermocouples at two sides of an infrared detecting point, and utilizes the signal detected by the infrared detection system to compare with the temperature measured by the thermocouples. Compared with a traditional measuring system, the titanium ignition temperature measuring system has the advantages of high response speed, high measuring accuracy, no damage to the structure of a test piece, and low interference on a flow field, and can conveniently complete accurate measurement and real-time monitoring of the surface temperature of a turbine blade.

Infrared-temperature-measurement-principle-based temperature measuring system in titanium ignition test

The invention discloses a tester for a high-temperature high-speed titanium fire prevention material characteristic test and a testing method. The tester for the high-temperature high-speed titanium fire prevention material characteristic test comprises a test table base, a driving part, a micro-feeding mechanism, a pressure adjusting test cabin, a lubrication part, a stimulated blade part, a gas heater and a control part, wherein the simulated blade part comprises a wheel disc, and a test blade is arranged at the edge part of the wheel disc; the micro-feeding mechanism comprises a precise screw rod transmission part; a test piece tool is connected with the precise screw rod transmission part; the clamping end of the test piece tool aligns to the edge part of the wheel disc; the simulated blade part is arranged inside the pressure adjusting test cabin; a gas outlet of the gas heater is connected with a gas inlet of the pressure adjusting test cabin; and the gas inlet of the pressure adjusting test cabin aligns to the position of a scraping test. The tester for the high-temperature high-speed titanium fire prevention material characteristic test can be used for simulating grinding and scraping in a real working condition, and is used for a mechanism of a titanium fire failure of a titanium alloy, a fire-retardant mechanism of fire-retardant titanium alloy and an alloy element action mechanism, a fire-retardant coating action mechanism, a high-temperature strength research under a material fire-retardant condition and a research of a fire-retardant property estimation method well.

Tester for high-temperature high-speed titanium fire prevention material characteristic test and testing method

The utility model discloses a multifunctional high-temperature and high-speed frictional wear experimental machine comprising a main shaft power system, a radial micro-feeding system, an axial micro-feeding system, a flame heating system and a control system, wherein the main shaft power system comprises a wheel disc; a simulated blade is arranged at the edge part of the wheel disc; the main shaft power system can increase the speed of a belt to drive the wheel disc to drive the simulated blade to rotate at a high speed by a blade tip speed of 350m/s; the simulated blade at the edge part of the wheel disc can feed an experimental piece in a radial direction to realize scraping; the flame heating system is used for heating the experimental piece to achieve an actual temperature of the experimental piece; the wearable performance of various types of sealing materials can be tested, and an anti-titanium-fire experiment of an engine and the like can be carried out; and the axial feeding system can drive block-shaped, annular and pin-shaped experimental pieces to carry out axial feeding; ultrahigh-speed wearing is realized by the axial feeding system and the wheel disc and high-speed frictional wear conditions of a train rail, a grinding machine and the like can be simulated, so as to carry out researches of a frictional wear mechanism.

Multifunctional high-temperature and high-speed frictional wear experimental machine

The utility model discloses a high-speed and high-temperature abradability tester for a sealed coating layer. The high-speed and high-temperature abradability tester for the sealed coating layer comprises a disc wheel, a flame heating device and a coating layer test sample fixture. A simulated blade is arranged on the edge of the disc wheel. The disc wheel is connected with a main shaft accelerating device. The coating layer test sample fixture is connected with a feeding device. The clamping end of the coating layer test sample fixture faces right to the edge of the disc wheel. The flame jet end of the flame heating device points at the clamping end of the coating layer test sample fixture. The high-speed and high-temperature abradability tester for the sealed coating layer can simulate the abrasion under actual working conditions, can be better used for researches on the abrasion mechanism of sealed materials under high-temperature and high-speed working conditions, and can be used for testing the abradability of various sealed materials such as graphite-base sealed coating layers, metal-base sealed coating layers and ceramic-base sealed coating layers.

Guo Junfeng

Papers

High-speed and high-temperature abradable testing machine of tightly-closed coating and experimental method

Tester for high-temperature high-speed titanium fire prevention material characteristic test and testing method

Multifunctional high-temperature high-speed friction and wear testing machine and method

Multifunctional high-temperature and high-speed frictional wear experimental machine

High-speed and high-temperature abradability tester for sealed coating layer