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Extractor of cylinder liners

  • Added: 03.07.2017
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The proposed extractor with pneumatic drive and replaceable plates will significantly reduce the time for extrusion and, accordingly, reduce the difficulty of performing this operation

Project's Content

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Additional information

Design Part

During major repairs of internal combustion engines, the need to restore the cylinder block, namely the internal surfaces of the cylinders themselves to repair dimensions, is constantly encountered. But due to the fact that the treatment of these surfaces is quite difficult, there is a problem in pressing the cylinders out of the block so as not to damage the mirror.

Today, for such an operation, the company uses the method of manual pressing using mechanical extractors, this method is, in my opinion, quite outdated, since it slows down the entire repair cycle, and increases its cost.

The solution to this problem can be a extractor with a pneumatic drive and replaceable plates, due to which there will be a significant reduction in the time for pressing out and, accordingly, a decrease in the time required to perform this operation.

3.2 Device and principle of extractor operation

Extractor consists of replaceable bottom plate, shaft, crossbeam with studs and spacer. Also, its design includes a pneumatic cylinder with handles, and two valves with connectors.

The extractor works as follows. Compressed air is supplied to upper part of pneumatic cylinder through valve to divert extractor shaft to lower position. Air is shut off when shaft reaches lower position. Then the extractor is installed by means of handles inside the disassembled sleeve. At the same time, one of the sides of the lower plate must be lifted (or removed from the shaft). After that, the plate is released and assumes a horizontal position (or is installed on the shaft). Then air is supplied to air cylinder sub-piston space and extractor shaft starts moving to top. At further movement of the shaft, the studs of the bench are uniformly supported in the surface of the cylinder block, and the lower plate is pressed by its upper part to the lower end of the cylinder liner.

When the force exerted by the pneumatic cylinder exceeds the seating strength of the cylinder liner in the block, the liner begins to move upward. The extractor shaft is then moved down and then removed from the cylinder liner (deflecting or removing the bottom plate).

Drawings content

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