Dynamic heat engine load impact test device based on rapid compressor

Abstract

The invention provides a dynamic heat engine load impact test device based on a rapid compressor, which comprises a diesel engine, a spark plug, an oil injector and a motor, the spark plug and the oil injector are installed on one side of the diesel engine, the spark plug is located below the oil injector, and the opposite side of the oil injector on the diesel engine is used for installing a test piece which is used for installing a test system. The test system is used for measuring temperature, stress and strain of the test piece, the top of the diesel engine is provided with an air inlet valve and an exhaust valve which are both connected to the test system, and a crankshaft of the diesel engine is connected with the motor. According to the dynamic heat engine load impact test device based on the rapid compressor, the characteristics of an engine are combined, and through flexible control over an oil injection and ignition system, measurement of multiple modes such as jet flow flame heat engine load impact, premixed flame heat engine load impact and premixed flame heat impact can be achieved; and the defect of singleness of the traditional thermal shock / mechanical shock test is overcome.

Description

technical field [0001] The invention belongs to the technical field of thermal-mechanical load shock test, in particular to a dynamic thermal-mechanical load shock test device based on a fast compressor. Background technique [0002] With the continuous improvement of the strengthening degree of the internal combustion engine, the average effective pressure of the high-strength diesel engine is close to 3MPa, and the average speed of the piston has also reached more than 15m / s. Under the action of high heat and mechanical load, the working conditions of the heated parts of the combustion chamber will become more and more severe, such as cylinder head ablation, piston scuffing, cracking of piston pin seat, early wear of ring groove, cracking of ring bank on piston top surface and thermal cracking of combustion chamber throat edge Wait for the failure to become more obvious. It is not only necessary to consider isolated mechanical loads or thermal loads and thermal deformatio...

AI Technical Summary

Problems solved by technology

Existing flame shock test devices can only perform repeated flame shocks on the test piece in an open environment. On the one hand, only the influence of flame temperature is considered. Due to the large heat transfer loss, compared with the actual working environment of the engine, the test piece The surface temperature is low; on the other hand, the pressure cannot be adjusted during the test, and the thermal-mechanical load of the specimen under the joint action of thermal shock and mechanical shock cannot be simulated, and the dynamic thermal-mechanical load test of the specimen is not comprehensive

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