Heavy-duty engine deep thermal shock test device

Abstract

The invention relates to a deep thermal shock testing device of a heavy-duty engine. The deep thermal shock testing device comprises the engine, and is characterized in that a water outlet of the engine is connected with a third port of a second switching valve, a second port of the second switching valve is connected with a hot water tank, a first port of the second switching valve is connected with a cold water tank and a cold expansion water tank, and the cold expansion water tank is connected with a thermal expansion water tank which is connected with the second port of the second switching valve; a water inlet of the engine is connected with a third port of a first switching valve, a second port of the first switching valve is connected with a hot water tank, a first port of the first switching valve is connected with a third port of a three-way proportional valve, a first port of the three-way proportional valve is connected with the cold water tank, and a second port of the three-way proportional valve is connected with the first port of the second switching valve; the hot water tank is connected with a hot water heat exchanger and a steam heat exchanger, and the cold water tank is connected with a refrigerating unit. The deep thermal shock testing device can improve the number of alternations of unit time, and verify reliability of the engine within a short time.

Description

technical field [0001] The invention relates to a test equipment in the development test process of a heavy engine, in particular to a deep cold and heat shock test device for a heavy engine. Background technique [0002] According to GB / T19055-2003 Automobile Engine Reliability Test Method, during the development and test of the engine, it is necessary to assess the durability performance of the engine under the condition of thermal expansion and cold contraction, and check the performance of the engine under the action of high differential heat load; focus on the assessment of cylinder head, The reliability of cylinder head gaskets, pistons, valves and other moving parts under the impact of cold and heat loads. [0003] The thermal shock test specifications are shown in Table 1. In Table 1, the time required for the Tp series engine to heat itself to the specified outlet water temperature, the conversion of working conditions 1 to 2, 2 to 3 is completed within 5s; working ...

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Problems solved by technology

[0017] Since the test specification is quite different from the national standard test specification, the original national standard thermal shock test equipment can no longer meet the requirements of the test specification, so it is necessary to design and manufacture a set of deep thermal shock test equipment suitable for heavy-duty engines according to the requirements of the test specification. to meet the needs of the factory's heavy-duty engine reliability development test

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