Grease hydrostatic lubrication system for heavy numerical control roll grinder center frame bearing shoe

Abstract

The invention discloses a grease hydrostatic lubrication system for a heavy numerical control roll grinder center frame bearing shoe. One side of the bearing shoe serving as a supporting surface is provided with a groove-shaped lubricating oil bag and is further provided with a grease inlet channel communicated with the lubricating oil bag; a grease inlet of a grease hydrostatic pressure pump is connected with a grease tank; a grease outlet of the grease hydrostatic pressure pump is connected with a grease inlet of an overflow valve through a pipeline; and a grease outlet of the overflow valve is connected with the grease inlet channel on the bearing shoe through a pipeline. Grease hydrostatic lubrication is utilized in the grease hydrostatic lubrication system for the heavy numerical control roll grinder center frame bearing shoe, and the viscosity of grease is high, so the grease is unlikely to leak and the bearing pressure is high. The heavy numerical control roll grinder center frame bearing shoe is fully lubricated, heating of the bearing shoe is reduced, abrasion of the bearing shoe is reduced, the number of times of replacing the bearing shoe is lowered, and bearing shoe replacing cost is reduced. The grease is not recycled, so grease pollution and emulsification are avoided and the grease does not need replacing. The grease automatically runs between the bearing shoe and a roll neck and the bearing shoe does not need grinding frequently, so sealing performance can also be guaranteed. The grease hydrostatic lubrication system is simple in structure, economical and practical; and the price of the grease is low, so the cost is saved.

Description

technical field [0001] The invention relates to an auxiliary system of a heavy-duty numerical control roll grinder, in particular to a dry oil static pressure lubrication system for the center frame support tile of the heavy-duty numerical control roll grinder. Background technique [0002] At present, the lubricating system of the center frame bracket of the roll grinder is lubricated with thin oil. The oil inlet of the hydraulic pump 3 is connected to the oil supply tank 1 through the first filter 2, and the oil outlet of the hydraulic pump is connected to the second filter 11 all the way. The other way is connected with the overflow valve 6, the second filter is connected with the one-way valve 5, one way of the one-way valve is connected with four throttle valves 8, the other way is connected with the pressure relay 7, and the four sections The flow valves are respectively connected to the oil inlet channel 10 of a support shoe, the oil outlet channel of the support shoe...

AI Technical Summary

Problems solved by technology

[0003] First: Thin oil lubrication of the center frame bracket cannot solve the heating problem of the center frame bracket during the grinding process of heavy rolls. Because the roll is heavy, the thin oil will be lost on the bracket quickly, so that the gap between the bracket and the roll shoulder Can not get sufficient lubrication, so that the friction force increases, resulting in serious heating of the paddle (the temperature is as high as 150°), and it cannot be ground normally;

[0004] Second: The amount of thin oil is relatively large. Due to the strong fluidity of thin oil, if the contact between the support shoe and the roller shoulder is not good during the grinding process, a large amount of thin oil will be lost, resulting in a waste of resources;

[0005] Third: The replacement cycle of the center frame bracket is relatively fast. Due to insufficient lubrication, the bracket wears faster. In order to better grind the rolls, it is necessary to continuously replace the bracket, thereby increasing the cost.

[0008] First, the contact area between the support shoe and the roll neck is small, and it is difficult to form a flowing oil film between the two contact surfaces. The oil often seeps out from the support shoe, which cannot form a static pressure support, resulting in the roll being unable to rotate;

[0009] Second, when grinding the roll, the cooling water will be sprayed on the support shoe, and the water will flow into the recycled hydraulic oil, which will pollute the oil and cause oil emulsification. The emulsion containing dust and other dirt can cause the hydraulic oil to deteriorate, deteriorate, Generate sludge and sediment, block pipes and valves, and reduce the lubricity of hydraulic oil;

[0010] Third, the static pressure system has high requirements on the cleanliness of the oil. The roll necks of the work rolls removed from the rolling mill are very dirty. After the oil is polluted, the filter holes will be blocked, resulting in insufficient oil supply, cavitation, vibration and Noise will also affect the reliability and accuracy of the action between the support shoe and the roll neck, causing wear on the sliding part, resulting in increased friction between the support shoe and the roll neck, making the support shoe easy to grind, requiring frequent scraping and oil change

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