Hydraulic variable loading system for roller-plate coal mill

A technology of hydraulically variable loading and coal mills, which is applied in cement production, grain processing, etc., and can solve problems such as easy vibration, unstable operation of coal mills, and long time

Inactive Publication Date: 2007-03-28
SHENYANG HEAVY MACHINERY GROUP
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AI Technical Summary

Problems solved by technology

[0002] At present, the roller disc coal mill has been widely used in coal-fired system equipment in domestic and foreign power stations, metallurgy, chemical industry, cement and other industries. In recent years, domestic roller disc coal mills have been continuously improved, but there are still many problems , the coal mill cannot operate safely under low load conditions, and is prone to vibration, which may damage the coal mill body and coal mill parts
The coal mill is always in an unstable operating state, which wastes energy and affects the service life of the reducer Michel bearings, gears, grinding rollers, internal bearings, and grinding pads. Adjust the grinding pressure of the coal mill
It is difficult to replace the parts of the mill after they are worn out, it is inconvenient to overhaul, and the time is long, so that the equipment manufacturer cannot operate normally, and the economic loss is very large

Method used

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  • Hydraulic variable loading system for roller-plate coal mill

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Embodiment Construction

[0006] The whole system consists of filter 1, liquid level gauge 2, thermometer 3, two-way filter 4, two-position two-way solenoid valve 5, cooler 6, motor 7, double pump 8, first throttle valve 9, first overflow Throttle valve 10, second throttle valve 11, first one-way valve 12, second overflow valve 13, third throttle valve 14, high-pressure two-way filter 15, second one-way valve 16, first speed regulating valve 17. The third one-way valve 18, the pressure transmitter 19, the fourth throttle valve 20, the pressure gauge 21, the fifth throttle valve 22, the first accumulator 23, the third overflow valve 24, the sixth throttle valve Valve 25, two-position four-way manual reversing valve 26, seventh throttle valve 27, two-position four-way electromagnetic reversing valve 28, two-position two-way electromagnetic reversing valve 29, second accumulator 30, fourth overflow Throttle valve 31, hydraulic cylinder 32, second speed regulating valve 33, eighth throttle valve 34, fifth ...

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Abstract

The hydraulic variable loading system for roller-plate coal mill in power station, cement mill, etc. consists of filter, motor, two-gang pump, high pressure bi-directional filter, pressure speed variator, energy accumulator, two-position four-way solenoid valve, hydraulic cylinder, proportional overflow valve, etc. The motor drives the two-gang pump to provide the hydraulic kinetic energy, and under the control in the central control room via the pressure speed variator, proportional overflow valve and the hydraulic variable loading system, the work pressure is applied to the hydraulic cylinder cavity. The system of the present invention is novel, safe and reliable, and makes the coal mill operate stably at low load.

Description

Technical field: [0001] The invention relates to a hydraulic variable loading system for roller disc coal mill equipment in the technical field of power stations and cement combustion. Background technique: [0002] At present, the roller disc coal mill has been widely used in coal-fired system equipment in domestic and foreign power stations, metallurgy, chemical industry, cement and other industries. In recent years, domestic roller disc coal mills have been continuously improved, but there are still many problems , The coal mill cannot operate safely under low load conditions, and is prone to vibration, which will damage the coal mill body and coal mill parts. The coal mill is always in an unstable operating state, which wastes energy and affects the service life of the reducer Michel bearings, gears, grinding rollers, internal bearings, and grinding pads. Adjust the grinding pressure of the coal mill. It is difficult to replace the parts of the mill after they are worn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C15/00
CPCY02P40/10
Inventor 曹玉书于红旭
Owner SHENYANG HEAVY MACHINERY GROUP
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