Cooling protection device for spindle gear of CNC gantry machine tool

Abstract

The invention discloses a main shaft gear cooling protection device of a numerical control gantry machine tool. The main shaft gear cooling protection device comprises an oil cooler (1) and an oil return pump (2), wherein an outlet of the oil cooler is communicated with a main shaft box (4) through an oil cooling pipe (10); an inlet of the oil return pump (2) is communicated with the main shaft box (4) through a first oil return pipe (11); an outlet of the oil return pump (2) is communicated with an inlet of the oil cooler (1) through a second oil return pipe (12); the pipeline of the first oil return pipe (11) is provided with a one-way valve (6); the side wall of the main shaft box (4) is provided with a liquid level gauge (7) of the liquid level of lubricating oil; the cooling protection device also comprises a PLC (Programmable Logic Controller) system (8); an input port of the PLC system (8) is connected with the liquid level gauge (7); an output port of the PLC system (8) is connected with the oil cooler (1) and the oil return pump (2) respectively; the one-way valve (6) can prevent the lubricating oil from flowing back into the main shaft box (4); the PLC system (8) timely controls the oil cooler (1) and the oil return pump (2) according to the liquid level detected in real time, so that the lubricating oil in the main shaft box (4) is kept in a safety range, and further a main shaft bearing (3) is effectively prevented from being damaged due to invasion of the lubricating oil.

Description

technical field [0001] The invention relates to a cooling protection device for a main shaft gear, in particular to a cooling protection device for a main shaft gear of a CNC gantry machine tool. Background technique [0002] As is known, when the main shaft of CNC gantry machine tool is continuously running at high speed and heavy-duty cutting workpieces, the main shaft lubricating oil cooling device lubricates and cools the main shaft gears to avoid gear damage due to excessive temperature rise; common main shaft lubricating oil cooling devices generally include oil Cooler and oil return pump, the oil cooler supplies oil to the main shaft box to lubricate the main shaft gear, and the oil return pump pumps the lubricating oil in the main shaft box back to the oil cooler for recycling; but in the process of use, it is often found that when the oil return pump When the machine stops or fails, the lubricating oil in the oil return pipeline will flow back into the spindle box, ...

AI Technical Summary

Problems solved by technology

[0002] It is known that when the spindle of CNC gantry machine tool is continuously running at high speed and heavy-duty cutting workpieces, the spindle lubricating oil cooling device lubricates and cools the spindle gears to avoid gear damage due to excessive temperature rise; common spindle lubricating oil cooling devices generally include oil Cooler and oil return pump, the oil cooler supplies oil to the main shaft box to lubricate the main shaft gear, and the oil return pump pumps the lubricating oil in the main shaft box back to the oil cooler for recycling; however, it is often found during use that when the oil return pump When shutdown or failure occurs, the lubricating oil in the oil return pipeline will flow back into the main shaft box, making the level of lubricating oil in the main shaft box higher than that of the main shaft bearing, which will take away the lubricating grease in the main shaft bearing, resulting in damage to the main shaft bearing

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