Grinding roller lubricating system of four-roller vertical mill

Abstract

The invention discloses a grinding roller lubricating system of a four-roller vertical mill. The grinding roller lubricating system comprises an oil supply pipeline, an oil return pipeline and an oil tank, wherein lubricating oil is stored in the oil tank, and the oil supply pipeline and the oil return pipeline are respectively connected between the oil tank and an oil cavity of four grinding rollers of the vertical mill, so a circulation oil supply loop is formed, wherein the oil supply loop is sequentially connected with an oil pump assembly, a one-way valve, a filter, a gear flow rate distributor and a valve from the oil tank, in addition, a bypass pipeline is led out between the gear flow rate distributor and the filter and is communicated with the oil tank, a throttle valve is arranged on the bypass pipeline, and the oil return pipeline is sequentially connected with the filter, the oil pump assembly and the one-way valve from the oil cavity of the grinding rollers. The grinding roller lubricating system has the following advantages that the four grinding rollers always maintain the same oil supply quantity, and the insufficient oil supply of a certain grinding roller is avoided; the grinding roller lubricating system has the characteristics that the circulation oil pump is saved, the energy consumption is reduced, the oil overflow of the grinding rollers is prevented, and the like; and in addition, higher safety and higher reliability are realized.

Description

[0001] technical field [0002] The invention belongs to vertical mills used in industries such as building materials, metallurgy or cement, and in particular relates to a roller lubrication and oil supply system for four-roller vertical mills. Background technique [0003] Since the grinding roller of the vertical roller mill is in operation, on the one hand, it absorbs the high ambient temperature in the mill and transfers its heat, on the other hand, with the rotation of the grinding roller, the grinding roller bearing will also generate a lot of heat. This requires the grinding roller lubrication system to provide circulating oil flow for the grinding roller bearings, take away the heat and wear impurities, and cool and lubricate the grinding rollers. [0004] The traditional four-roller lubrication system mainly has four oil supply pumps that absorb oil from the oil tank and supply lubricating oil to the four grinding rollers respectively, and at the same time, the lubr...

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Problems solved by technology

[0005] The traditional four-roller lubrication system also has the following disadvantages in terms of cost and technology during use: (1) When the ambient temperature is low, in order to heat the oil in the oil tank before starting up, the system needs to be equipped with another The circulation pump in the station, the circulation pump is turned on at the same time as the electric heater is turned on, which reduces the heating time and increases the manufacturing cost of the equipment

(2) Although the balance pipe can ensure that the pressure between the oil chamber of the grinding roller and the oil tank is equal, in the cold winter, due to the long oil return pipeline and the reduction of the oil return, the liquid level of the oil chamber of the roller rises, and the oil overflows into the balance pipe. The cold flow rate is slow, or there are V-shaped or U-shaped bends in the balance pipeline, which will easily cause the balance pipe to be blocked, which will make the pressure monitoring in the grinding roller bearing cavity disorder, destroy the start / stop operation time of the oil supply pump, and even cause a large amount of lubricating oil in the grinding roller. overflow, increasing the maintenance cost of the equipment

(3) Since each oil supply pump and oil return pump requires a motor as a power source, the long-term operation consumes a lot of power, which increases the operating cost of the equipment

(4) Due to the difference in the distance of the pipes connecting the four grinding rollers, it is easy to cause different oil supply into each grinding roller

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