Vertical roller mill hydraulic system

Abstract

The invention relates to a vertical roller mill hydraulic system, which comprises a plurality of grinding roll clamping hydraulic cylinders, a plurality of accumulator groups, a hydraulic station and connecting pipelines among the grinding roll clamping hydraulic cylinders, the accumulator groups and the hydraulic station, wherein the hydraulic station comprises an oil tank device, an oil pump device, a grinding roll clamping control valve group and connecting pipelines among the oil tank device, the oil pump device and the grinding roll clamping control valve group; a feedline of the oil pump device is connected with an inlet of the grinding roll clamping control valve group; an oil pump motor supplies oil for the grinding roll clamping control valve group; an outlet of the grinding roll clamping control valve group is connected with piston rod cavities of the grinding roll clamping hydraulic cylinders and the accumulator groups; rodless cavities of the grinding roll clamping hydraulic cylinders are connected with the grinding roll clamping control valve group through a plurality of oil return pipes; the grinding roll clamping control valve group controls the telescoping of piston rods of the grinding roll clamping hydraulic cylinders through a plurality of electromagnetic directional valves; and the accumulator groups absorb the vibration of the grinding roll clamping hydraulic cylinders respectively. The vertical roller mill hydraulic system solves the problem of loaded pressure boost of the system and improves the service life of grinding rolls and grinding discs and the maintenance efficiency.

Description

technical field [0001] The invention relates to the field of industrial manufacturing hydraulic pressure, in particular to a vertical roller mill hydraulic system used in a slag grinding production line in the metallurgical industry. Background technique [0002] At present, there are three-roll, four-roll and six-roll types of slag vertical roller mills at home and abroad, and the hydraulic systems of various types of vertical roller mills are different. [0003] For example, the hydraulic system of the Boliquius four-roller vertical mill adopts the plunger cylinder type to pressurize the grinding rollers, and directly supplies oil to the four oil cylinders through two double pumps. There is a valve block for setting the system safety pressure on the pump group, and a valve block for setting the pressure on the pump outlet bypass. Each oil cylinder is equipped with an accumulator and its safety valve group on the pressurized side. Its working principle is: oil pump After s...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an improved hydraulic system of a vertical roller mill, which solves the problem of pressurization with load in the prior art. The rear system makes the grinding roller lift up quickly; the grinding roller and the grinding disc will never touch during the whole production process, which improves the service life of the grinding roller and grinding disc

Images