Pressure test device for diesel engine air distributor body

Abstract

The invention provides a pressure test device for a diesel engine air distributor body. A flange plate and the right end of an air distributor body are positioned and sealed, a pressing plate and the left end of the air distributor body are positioned and sealed, the flange plate and the pressing plate are fixedly connected into a whole through a long bolt connected to the pressing plate in a sealed mode, and a pressing sealing piece I is arranged on the flange plate; a positioning block is fixed to the outer wall of the flange plate, a connector sealing piece is arranged on the pressing plate, an orifice of an air channel III is fixedly connected with a screw plug in a threaded mode, and a hoop sealing piece used for sealing the air channel VIII and an air channel IV is detachably fixed to the outer circumferential wall of the air distributor body. The pressure test device solves the quality problem of leakage in the test process of the diesel engine air distributor body, improves the quality of the air distributor body, provides a reliable sealing structure for pressure and sealing of various air distributor bodies with complex holes of products of the same type, and is simple in structure, low in machining and manufacturing cost, convenient to install, good in universality and safety, suitable for pressure tests of various media and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of testing diesel engine air distributors, and in particular relates to a pressure test device for a diesel engine air distributor body. Background technique [0002] The air distributor is one of the important parts of the diesel engine. When the diesel engine is started, the air distributor distributes the compressed air as the control air. During the working stroke, the compressed air is distributed to each starting valve according to the firing sequence. There are distributor holes in the distributor body. And the bearing holes of the drive shaft of the distributor disc are distributed in the radial and axial directions of the air distributor body. In order to ensure the reliable operation of the air distributor, it is necessary to conduct a strength and tightness test on the air distribution body (requirements: the test medium is anti-rust water, the test pressure is 6MPa, the pressure is maintained for...

AI Technical Summary

Problems solved by technology

In the past, through crack detection on the air distributor body, it can be confirmed that there are no cracks and other processing defects, and it can be confirmed as a qualified part. However, due to the poor sealing of the air distributor body, the problem of diesel engine startup failure often occurs

Once the test fails, it is necessary to check the starting system. It is finally determined that the quality of the distributor body is not up to standard, resulting in abnormal leakage of the distributor control air, which seriously affects the test efficiency and wastes a lot of manpower and material resources. Therefore, it is necessary to complete the processing on the air distributor body. Finally, add a strength and tightness test to avoid the failure quality of the body seal before assembly. Therefore, it is urgent to design a pressure test device that can meet the complex airway test requirements of the distributor body

[0003] The air distributor body 9 is a shaft disc structure such as Figure 1-4 As shown, there are many airways, and there are 8 kinds of airways in total, which can be roughly divided into two types: radial airways and axial airways. Among them, airway III3, airway IV4, airway V5, and airway VIII8 are radial airways. Airway I1, airway II2, airway VI6, and airway VII7 are axial airways, airway I1 connects with airway VIII8, airway II2 connects with airway III3, airway IV4 connects with airway VII7, and airway V5 connects with airway respectively. Channel Ⅵ6 and air channel Ⅶ7 are connected, and air channel Ⅰ1 is composed of three 120° holes evenly distributed on the end surface of the air distributor body 9, and air channel 8 is composed of three 120° evenly distributed on the air distributor body 9 stepped holes Composition, air channel Ⅱ2 is composed of 6 holes evenly distributed on the end face of the air distributor body 9 at 60°, air channel III3 is composed of 6 stepped holes at 60° evenly distributed on the shaft diameter of the air distributor body 9, and air channel VII7 Through the main body, the air channel III3 in the air distributor body 9 is a threaded orifice, which can be blocked by a threaded structure such as a screw plug. There are no threaded holes for attaching test devices near the other air channel orifices, so it is difficult to seal. The test cannot be completed through simple solutions such as standard screw plugs, plugs, flanges, and pressure test joints. Therefore, it is necessary to improve the above problems

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