Numerically-controlled machine tool gearbox intelligent oil return system with auxiliary oil tank and working method of numerically-controlled machine tool gearbox intelligent oil return system

Abstract

The invention discloses a numerically-controlled machine tool gearbox intelligent oil return system with an auxiliary oil tank and a working method of the numerically-controlled machine tool gearbox intelligent oil return system. The system comprises a gearbox, a main oil tank, the auxiliary oil tank, a filter, an oil pump, an oil scavenger pump, a liquid level sensor, an information receiver, a relay and the like. The auxiliary oil tank is mounted below one side of the gearbox. An oil inlet of the auxiliary oil tank is directly connected with the gearbox. An oil outlet of the auxiliary oil tank is connected to the main oil tank through the oil scavenger pump. The liquid level sensor is mounted in the auxiliary oil tank and controls turn-on and turn-off of the oil scavenger pump by detecting the height of the oil level. If the oil level in the auxiliary oil tank exceeds a set upper limit, the oil scavenger pump is turned on, and cooling oil in the auxiliary oil tank flows back into the main oil tank; when the oil level in the auxiliary oil tank is lower than a set lower limit, the oil scavenger pump stops working. By adopting the numerically-controlled machine tool gearbox intelligent oil return system, a whole oil channel is smooth in oil return, the oil scavenger pump is prevented from working continuously while the cooling effect is guaranteed, energy consumption is reduced, and the intelligent oil return function is achieved.

Description

technical field [0001] The invention belongs to the field of oil return systems, and in particular relates to an intelligent oil return system for a gearbox of a numerically controlled machine tool with an auxiliary oil tank and a working method thereof. Background technique [0002] With the rapid development of modern manufacturing technology, the positioning repeatability and tool performance of CNC machine tools have been continuously improved. The temperature rise of the lubricating oil caused by the gear teeth and bearings inside the gearbox can easily lead to thermal deformation of the machine tool, resulting in reduced machining accuracy, unstable mechanical action, increased error, tool wear, and oil quality deterioration. Therefore, finding a reliable and practical method to reduce and avoid the heating of the gearbox is one of the key measures to improve the machining accuracy of the machine tool. [0003] At present, in the field of gearbox cooling and lubricati...

AI Technical Summary

Problems solved by technology

[0005] (1) The gear box is used as an oil storage tank, and a large amount of lubricating oil accumulated inside it is easy to splash on the box wall of the gear box when the oil is stirred, causing the oil leakage of the gear box

[0006] (2) There is air in the U-shaped pipe of the oil outlet hole of the gearbox, which easily hinders the oil return and reduces the lubrication and cooling effect

[0007] (3) The two oil pumps in the main oil tank have been working continuously, and the time of opening and closing the oil pumps cannot be adjusted in real time according to the amount of oil in the gearbox, which increases energy consumption

Among them, the auxiliary oil tank of this structure is mainly embedded in the machine bed for cooling, and there is also no mention of monitoring the oil level of the auxiliary oil tank to control the on-off of the oil return circuit.

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