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Fast cavitation erosion test device and test method for diesel engine multi-hole nozzle

A technology of porous nozzle and cavitation test, which is applied in the direction of fuel injection device, engine test, machine/structural component test, etc.

Active Publication Date: 2014-06-25
STANADYNE CHANGSHU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no experimental research has been carried out on the cavitation damage characteristics of real porous nozzles of diesel engines under certain back pressure conditions in the laboratory

Method used

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  • Fast cavitation erosion test device and test method for diesel engine multi-hole nozzle
  • Fast cavitation erosion test device and test method for diesel engine multi-hole nozzle

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the drawings.

[0024] The structure of the fast cavitation test device for the porous nozzle of the diesel engine of the present invention is as follows figure 1 Shown, including fuel supply system, injection system and back pressure system.

[0025] The fuel supply system includes a fuel tank 2, a fuel filter 3, a high-pressure fuel pump 4, and a common rail pipe 7, which are connected in sequence. The fuel tank 2 is equipped with a first heating tile 1 and a temperature sensor. The high-pressure fuel pump 4 is connected to a motor 6 The rail tube 7 is provided with a temperature sensor. The system mainly provides continuous and stable high-pressure fuel for the entire test device. The fuel changes from the fuel tank to high-pressure fuel after being pressurized by the high-pressure fuel pump, and then the fuel enters the common rail pipe, and the high-pressure fuel is supplied after the common rail ...

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Abstract

The invention discloses a fast cavitation erosion test device and a test method for a diesel engine multi-hole nozzle. The fast cavitation erosion test device comprises a fuel supplying system, an ejecting system and a backpressure system. The fuel supplying system comprises an oil tank, a fuel filter, a high-pressure oil pump and a common rail pipe which are connected in sequence. The ejecting system comprises an oil atomizer and an aluminum magnesium alloy nozzle head cap. The backpressure system comprises a constant volume bomb, a third pressure gauge, a reducing valve and a nitrogen cylinder which are connected in sequence. The common rail pipe is connected with the oil tank through a first oil returning pipeline, and the constant volume bomb is connected with the oil tank through a second oil returning pipeline. According to the test device and the test method for the diesel engine multi-hole nozzle, the nozzle cavitation erosion can be accelerated within short time, the effect of the cavitation erosion ratio on the later spraying is studied, and therefore guidance can be provided for reasonably designing a nozzle geometric structure, selecting appropriate metal materials, improving the fuel physical property and selecting the appropriate fuel temperature, and the theoretical guidance is provided for comprehensively taking the hole atomizing into consideration, preventing the cavitation erosion and optimizing a nozzle structure.

Description

Technical field [0001] The invention relates to the field of diesel fuel spray, which can be used for the experimental research of the internal cavitation erosion characteristics of diesel engine nozzles, and particularly refers to a test device for the research of internal cavitation erosion characteristics of diesel engine prototype nozzles with back pressure. Background technique [0002] Diesel engines have been deeply integrated into our lives since they were developed. Whether in the field of construction machinery or in other fields such as vehicles, ships, national defense, etc., there are a large number of applications, which play an important role in supporting the development of the national economy. The development of modern diesel engines is directly related to the increase in fuel injection pressure. The electronically controlled high-pressure common rail fuel injection system can completely separate the generation of fuel injection pressure and the injection proces...

Claims

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Application Information

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IPC IPC(8): F02M65/00
Inventor 钟汶君何志霞王谦张亮
Owner STANADYNE CHANGSHU CORP
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