Device and method for buffering main oil cylinder of paste filling pump in coal mine

Abstract

The invention relates to device and method for buffering a main oil cylinder of a paste filling pump in a coal mine, and belongs to a device and a method for buffering a paste filling pump. The device comprises a cylinder barrel, a piston, a limiting cover, an oil cylinder bottom, a floating restrictor ring and a piston rod, wherein the oil cylinder bottom is connected to one end of the cylinder barrel; the piston is positioned in the cylinder barrel; the limiting cover is connected with the oil cylinder bottom; the floating restrictor ring is arranged between the limiting cover and the oil cylinder bottom; the stern post of the piston rod is inserted into the floating restrictor ring; and the piston rod is connected with the piston by adopting screw threads. In the method, the stern post of the piston rod is in a stepped structural form, and buffer action is completed with the gradual reduction of a gap positioned between the stern post of the piston rod and the floating restrictor ring and the gradual increase of buffer degree in the process of the stern post of the piston rod gradually inserted into the floating restrictor ring. According to the invention, the problem of large processing difficulty caused by high required match accuracy is solved, and the requirement for regulation of buffer effect under different work conditions is realized; and the device disclosed by the invention has the advantages of simple structure, stable and reliable work and long service life.

Description

technical field [0001] The invention relates to a buffer device and method for a filling pump, in particular to a buffer device and method for a main oil cylinder of a coal mine paste filling pump. Background technique [0002] A buffer device is an essential component of a hydraulic cylinder, and the prior art hydraulic cylinder buffer device includes a buffer ring and a throttle valve. The buffer ring and the buffer hole are sealed and slidingly matched, and the hydraulic oil enters the oil chamber of the cylinder head through the diversion hole and the throttle valve, and then is discharged back to the oil tank through the oil outlet. The advantage of this method is that it has the ability to meet different requirements for buffering effects under different working conditions, but the matching precision between the outer diameter of the buffer ring and the buffer hole in the prior art is very high, so the matching precision for manufacturing and processing is also very hi...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it can meet the different requirements for the buffering effect under different working conditions, but the matching precision between the outer diameter of the buffer ring and the buffer hole in the prior art is very high, so the matching precision for manufacturing and processing is also very high, and the structure is relatively high. Complicated, if the size or shape tolerance of the matching parts is out of tolerance, it is easy to cause poor cooperation between the buffer ring and the buffer hole, resulting in unstable operation of the buffer device

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