A blockage pressure detection device

Abstract

The invention discloses a blockage pressure-bearing detection device which comprises a pin bush and a plug, wherein an inner bore which contains a crank pin and is tightly connected with one end of the crank pin is arranged in the pin bush. An opening hole is formed in one end of the pin bush, the other end of the pin bush is in threaded connection and sealed with the plug, the inner bore is communicated with the atmosphere through the opening hole, the internal diameter of the opening hole is larger than the external diameter of the plug of the crank pin, and an oil inlet which can lead in hydraulic oil and is communicated with an oil hole in the crank pin is formed in the plug. During the detection, the crank pin is inserted into the inner bore, the plug is screwed into the pin bush, then, the hydraulic oil is led into the oil inlet, at the moment, the crank pin is positioned in an enclosed space provided by the pin bush, one end of the plug is subjected to hydraulic pressure, and the other end of the plug is communicated with the atmosphere through the opening hole, so that the pressure-bearing capacity of the plug can be accurately calculated through the pressure difference of the two ends. In conclusion, the blockage pressure-bearing detection device is suitable for mass detection, moreover, the pressure-bearing capacity of the plug can be accurately measured, the product reliability is improved, and the fault risk factor is reduced.

Description

technical field [0001] The invention relates to the technical field of pressure testing of a crankshaft lubrication system, in particular to a clogging pressure bearing detection device. Background technique [0002] Please refer to figure 1 , figure 1 Schematic diagram of the crank pin structure. [0003] During the movement of the crankshaft and connecting rod assembly, the lubricating system needs to supply lubricating oil for lubrication. The crank pin plays this role. The structure of the crank pin is as follows: figure 1 As shown, it mainly includes a pin body 01, an axial through hole 02 provided in the pin body 01, and an oil hole 03 which is the same as the axial through hole. Due to structural reasons, two ends of the axial through hole of the crank pin need to be press-fitted with two plugs 04 for sealing, and only one oil hole 03 in the middle is reserved to supply oil to the bearing. In this way, a certain oil pressure acts on the plug 04 at both ends, so th...

AI Technical Summary

Problems solved by technology

Once the blockage 04 cannot withstand the oil pressure, falls out during work, and releases the pressure itself, the lubrication of the bearing will lose pressure, resulting in lubrication failure

[0004] Therefore, it is necessary to detect the pressure bearing capacity of the blockage. In the prior art, the pressure that the blockage can withstand is usually detected through the installation test, which is only limited to the complete machine test. There is no special detection device for the blockage at both ends of the crank pin. Test the pressure bearing capacity

On the one hand, the pressure-bearing capacity of the product cannot be tested in large quantities during the production stage, and the reliability of the product is poor; on the other hand, the measurement accuracy of the whole machine test is poor

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