An engine block test load application device

Abstract

The invention belongs to the technical field of engine testing, and in particular relates to an engine body test load applying device. The device includes cylinder head, cylinder gasket, non-standard piston, connecting rod, crankshaft or non-standard straight shaft and O-ring, and also includes pressure amplifier and high-pressure cavity, which is connected with the cylinder head by uniformly distributed bolts. The top of the standard piston is provided with an internal thread suitable for the pressure amplifier. The pressure amplifier is screwed on the non-standard piston through the thread. A test pressure chamber is formed between the top of the pressure amplifier and the high-pressure chamber. The pressure amplifier uses an O-ring and a high-pressure chamber radial seal. The invention improves the reliability of the sealing link in the high-explosive-pressure engine body test, reduces the test equipment load, and ensures the smooth progress of the high-explosive-pressure engine body reliability test. The test efficiency is improved, and the loading capacity of the test system is also improved.

Description

technical field [0001] The invention belongs to the technical field of engine testing, and in particular relates to an engine body test load applying device. Background technique [0002] As the engine explosion pressure and power density continue to increase, the reliability of engine components is facing severe tests. Among them, the reliability of the engine body as the engine skeleton is particularly important. In the engine development stage, it is not only necessary to calculate, analyze and evaluate it, but also must Its reliability can only be guaranteed by physical stress measurement and fatigue test verification. [0003] Through the engine body test load application device, the simulated explosion pressure load can be applied to the high explosion pressure engine body, so as to carry out fatigue reliability assessment of the body and stress measurement under dynamic and static loads. [0004] At present, the engine body component test generally adopts the method ...

AI Technical Summary

Problems solved by technology

The outlet pressure of the electro-hydraulic servo test system used for load application generally does not exceed 30MPa, but as the engine explosion pressure becomes higher and higher, the reliability requirements for components are getting higher and higher, and the maximum test load required for some diesel engines to be tested It has exceeded 30MPa, which exceeds or is close to the limit capacity of most electro-hydraulic servo test systems in the world. When performing fatigue tests, the test system operates under such a high load for a long time, which will have a negative impact on the life of the test system. If the traditional test method is adopted under load, the sealing link of the body load application device is prone to failure, which cannot guarantee the smooth progress of the test

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