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Hydraulic variable loading system for roller-plate coal mill

A hydraulic variable loading, coal mill technology, applied in cement production, grain processing, etc., can solve the problems of adjusting the grinding pressure of coal mills, wasting energy, and difficult to replace.

Inactive Publication Date: 2005-09-28
SHENYANG HEAVY MACHINERY GROUP
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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-connected pump 8, throttle valve 9, overflow valve 10, Throttle valve 11, one-way valve 12, overflow valve 13, throttle valve 14, high-pressure two-way filter 15, one-way valve 16, speed control valve 17, one-way valve 18, pressure transmitter 19, throttle valve 20, Pressure gauge 21, throttle valve 22, accumulator 23, overflow valve 24, throttle valve 25, two-position four-way manual reversing valve 26, throttle valve 27, two-position four-way electromagnetic reversing valve 28, Two-position two-way electromagnetic reversing valve 29, accumulator 30, overflow valve 31, hydraulic cylinder 32, speed control valve 33, throttle valve 34, overflow valve 35, throttle valve 36, throttle valve 37, throttle flow valve 38 and proportional relief valve 39, the motor 7 drives the double pump 8 to provide hydraulic kinetic en...

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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 Applications(China)
IPC IPC(8): B02C15/00
CPCY02P40/10
Inventor 曹玉书于红旭
Owner SHENYANG HEAVY MACHINERY GROUP
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