Device and method for inspecting fuel injection status of fuel injector in generator set target shooting test

Abstract

The invention relates to the technical field of generator set testing, in particular to a device for checking the fuel injection status of a fuel injector in a generator set target test, including a high-pressure ball head oil pipe and an oil pump, and one end of the high-pressure ball head oil pipe is connected to the fuel injector through a hollow oil pipe bolt The position of the oil plug; the oil outlet end of the oil pump is connected to the other end of the high-pressure ball head oil pipe, and the pipeline at the oil inlet end of the oil pump leads into the machine oil. A method for inspecting the fuel injection status of a fuel injector in the target shooting test of a generator set, using the aforementioned device for checking the fuel injection status of the fuel injector in the target shooting test of a generator set. This patent can conveniently check the fuel injection status of the fuel injector when the machine is not turned on, which can greatly avoid the problem of the fuel injector causing the unit to pull cylinders, and greatly promote the comprehensiveness of maintenance and the reliability of the equipment.

Description

technical field [0001] The invention relates to the technical field of generator set testing, in particular to a device and method for checking the fuel injection status of a fuel injector in a generator set target shooting test. Background technique [0002] At present, many 1000kw generator sets often have cylinder scuffing without failure during operation, resulting in the scrapping of pistons and cylinder liners, and it is difficult to find out the direct cause during the inspection process. According to the experience of our company's unit maintenance master, the reason for engine scuffing is currently mainly caused by insufficient lubrication of lubricating oil. The lubricating oil is stored at the bottom of the oil pan of the unit. After being pressurized by the oil pump, it enters the main oil passage inside the machine body. The lubricating oil is accurately sprayed into the oil hole of the piston through the oil spray nozzle installed on the main oil passage. The ...

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Problems solved by technology

[0003] The fuel injector as a whole includes the oil pipe nozzle welded on the fuel injector body, the hollow screw and the oil plug, and the oil pipe nozzle has a certain bending angle; in addition, when the body is running, the flow direction of the oil circuit is as follows: oil pan → oil pump → Main oil passage→body nut→nozzle. In addition, when the unit is running, there is oil pressure in the main oil passage, so that the oil can enter the nozzle for fuel injection. When the unit is not running (shutdown during intermediate maintenance), there is no oil pressure, and the oil injection phenomenon cannot be checked. And the fuel pipe nozzle is inside the body, so it is impossible to directly check the fuel injection situation

[0004] Because the fuel pipe nozzle is welded on the main body of the fuel injector device, there may be the following reasons: 1. Due to the weak welding, there are false welds

2. There are trachomas in the welding process (the oil is drained from the position of the trachomas during operation) 3. The bending angle of the nozzle of the oil pipe is wrong

[0006] Through analysis, in the target test, the difficulties in checking the fuel injection status of the fuel injector mainly include the following aspects: 1. In the state of not starting, the fuel injector needs oil pressure so that the oil can flow from the fuel injector. The nozzle sprays out, so to check the fuel injection status, the premise is to ensure the oil pressure; 2. Due to the cover of the crank or the balance weight at the fuel injection nozzle, the position gap is narrow, such as the balance weight on the generator set of our factory is close to the nozzle The gap in the middle of the oil nozzle is very small, and it is impossible to directly check the fuel injection status; 3. There is no oil in the main oil passage, how to ensure that there is oil in the fuel injector; 4. If the traditional method is used, only the fuel injector is disassembled, cleaned and reinstalled. 5. If the pre-supply pump of the unit is used to check the fuel injection situation, the observation ports of the 16 cylinders will not be able to be installed and closed. The oil circuit will leak oil at the same time, causing a large amount of lubricating oil to leak, the effect is not ideal, and the time for observation is limited, it is impossible to see the oil injection situation clearly, and the oil injection nozzle only has a single row of oil injection, and the other row cannot spray oil , the test effect is not good

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