CN100998959A - Middle speed coal grinding machine - Google Patents
Middle speed coal grinding machine Download PDFInfo
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- CN100998959A CN100998959A CN 200610170806 CN200610170806A CN100998959A CN 100998959 A CN100998959 A CN 100998959A CN 200610170806 CN200610170806 CN 200610170806 CN 200610170806 A CN200610170806 A CN 200610170806A CN 100998959 A CN100998959 A CN 100998959A
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- grinding roller
- coal
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Abstract
A medium-speed coal grinder is composed of a machine frame with crude coal feeding channel and powdered coal discharging channel, a motor, a speed reducer, a rotary grinding disc driven by motor via speed reducer, a grinding roller on said grinding disc, a loading frame for said grinding roller, an oil supplying mechanism for the cylinder loading, and a hydraulic reactive force loading unit for absorbing the vibration of coal grinder and increasing speed and loading power.
Description
Technical field
The invention belongs to the disintegrating apparatus technical field, be specifically related to power plant bunker coal abrasive dust machinery.
Background technology
The coal pulverizer that uses in places such as power plants comprised frame in the past, be installed in the mill drive motor of frame lower, the reductor that connects motor, be positioned at the rotary grinding disk above the reductor, be pressed in the grinding roller on the mill, the loading frame that the grinding roller top is connected with grinding roller is fixed on the load cylinder on the basis, pull bar between oil cylinder and the loading frame, oil cylinder oil supply mechanism of forming by fuel tank, oil pipe, oil pump, choke valve, overflow valve and raw coal enter passing away with coal dust.The hydraulic loading system of existing coal pulverizer is only controlled the oil pressure of cylinder rod chamber by a proportional pressure control valve or electromagnetic relief valve, oil cylinder rodless cavity does not have pressure during coal pulverizer work, oil cylinder piston can rise when relatively large material process is milled the zone, then under pressure, grinding roller descends, impact mill, produce vibration, because this vibration aggravates with the increase and the increase of the pressure between grinding roller and the mill of mill revolution, for vibration is in the scope of operate as normal permission, existing product is as the MPS225 type coal pulverizer of in industry having finalized the design, its revolution only can reach 24.1r/min, and the on-load pressure maximum has only 450KN/m
2Because the rotating speed of mill and the pressure between grinding roller and mill do not increase the space, have limited the lifting of pulverizer capacity.
Summary of the invention
The purpose of this invention is to provide a kind of medium-speed pulverizer, overcome existing these type of coal pulverizer above shortcomings.
The frame that comprises existing coal pulverizer among the present invention, the raw coal of upper rack enter passing away with coal dust, be installed in the mill drive motor of frame downside, the reductor that connects motor, be positioned at the rotary grinding disk above the reductor, be pressed in the grinding roller on the mill, the loading frame that the grinding roller top is connected with grinding roller, be fixed on the load cylinder on the basis, pull bar between oil cylinder and the loading frame, by fuel tank, oil pipe, oil pump, proportional pressure control valve, accumulator, the oil cylinder that electric control element is formed loads oil supply mechanism, and the improvement of being done is to set up by the reaction force oil pump on the pipeline that connects oil cylinder rodless cavity and fuel tank, choke valve, proportional pressure control valve, the reaction force hydraulic loaded mechanism that accumulator is formed.
Use good effect of the present invention to be: the reaction force hydraulic loaded controlling organization of being set up, can absorb the vibration of coal pulverizer, thereby the ratio of coal mill foundations piece was reduced to 3: 1 by 5: 1, on original 225 type coal pulverizers, set up reaction force hydraulic loaded controlling organization, its revolution can increase to 29.9r/min, and the on-load pressure maximum can reach 750KN/m
2, the working speed of mill is improved more than 25%, improve maximum load power more than 65%, expand the live load scope of coal pulverizer.By increasing the working speed of mill, improve the mill stroke of coal pulverizer in the unit interval, thereby increase pulverizer capacity; By improving loading force, the efficient of coal pulverizer broken material is improved, reduce the circulating ratio of material in the coal pulverizer, thereby improve pulverizer capacity, reduce coal pulverizer body resistance.
Description of drawings.
Fig. 1 is a coal pulverizer overall structure schematic diagram of the present invention.
Fig. 2 is a hydraulic system schematic diagram of the present invention.
The specific embodiment
By prior art manufacturing and assembling frame 2, upper rack raw coal being installed enters and the coal dust passing away.Fixedly the bottom is installed the reductor 3 that connects motor, rotary grinding disk 4 is installed above the reductor in mill drive motor 1, the frame on the basis under the frame, grinding roller 5 is pressed on the mill, install that the loading frame 6, the load cylinder 8 that are supported on the grinding roller axle are fixed on the basis above the grinding roller, is connected, connects fuel tanks 10 and oil cylinder 8 rod chambers with pipeline 9 with pull bar 7 between oil cylinder piston bar and the loading frame, with the rodless cavity of pipeline 11 connection fuel tanks 10 and oil cylinder 8.Install on pipeline 9 and load oil pump 12, reach accordingly, proportional pressure control valve 13 loads accumulator 14.Reaction force oil pump 15 is installed on the pipeline 11 of the rodless cavity that connects fuel tank 10 and oil cylinder 8, and corresponding choke valve 16, proportional pressure control valve 17, reaction force accumulator 18.With electric control element 19 connected control systems, promptly finish enforcement of the present invention.
The course of work of present embodiment is: start the mill drive motor, add raw coal, grinding machine enters duty.The loading force of coal pulverizer is from the dead weight and the outside active force of the parts of milling (roller, loading frame and pull bar).Applied external force mainly is to be produced by the oil pressure that acts on the hydraulic cylinder rod chamber (pressure of milling).Reaction force is to be produced by the oil pressure of rodless cavity (buffer brake), can be absorbed in effectively in the running and unload or roll the unexpected vibration that moves both vertically and produce of grinding roller in the process because of the pressure portion of milling.In the coal pulverizer running, because the bulk materials in the coal causes system overpressure, unnecessary pressure is stored in the accumulator, and system pressure carries out pressure again and discharges in the retrieval system when low, so reduces by accumulator because the impact that unexpected load causes.
In fact, the vibration of coal pulverizer is just in vertical direction, and the operation principle of explaining above can guarantee effectively to avoid oscillation phenomenon.
Hydraulic cylinder can obtain pressure oil at rodless cavity and rod chamber simultaneously.Two strands of oily streams are continuous, turn back in the fuel tank under the effect of active force control ratio overflow valve and reaction force control ratio overflow valve.Electric control element control ratio overflow valve makes rod chamber and rodless cavity oil pressure reach the force value of setting, and the reaction pressure scope of MPS225 type coal pulverizer is between 1.0～5.0MPa as the aforementioned.
Claims (1)
1, a kind of medium-speed pulverizer, comprise frame, the raw coal of upper rack enter passing away with coal dust, be installed in the mill drive motor of frame downside, the reductor that connects motor, be positioned at the rotary grinding disk above the reductor, be pressed in the grinding roller on the mill, the loading frame that the grinding roller top is connected with grinding roller, be fixed on the load cylinder on the basis, pull bar between load cylinder and the loading frame, by fuel tank, the pipeline that connects fuel tank and cylinder rod chamber, load oil pump, proportional pressure control valve, accumulator, the oil cylinder that electric control element is formed loads oil supply mechanism, it is characterized in that: set up by the reaction force oil pump on the pipeline that connects oil cylinder rodless cavity and fuel tank, choke valve, proportional pressure control valve, the reaction force hydraulic loaded mechanism that accumulator is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101708060A CN100446862C (en) | 2006-12-28 | 2006-12-28 | Middle speed coal grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101708060A CN100446862C (en) | 2006-12-28 | 2006-12-28 | Middle speed coal grinding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN100998959A true CN100998959A (en) | 2007-07-18 |
| CN100446862C CN100446862C (en) | 2008-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101708060A Active CN100446862C (en) | 2006-12-28 | 2006-12-28 | Middle speed coal grinding machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN100446862C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941141A (en) * | 2012-11-28 | 2013-02-27 | 北京电力设备总厂 | Roller ring mill |
| CN106890705A (en) * | 2017-04-18 | 2017-06-27 | 长春发电设备总厂 | A kind of medium-speed pulverizer |
| CN111339666A (en) * | 2020-02-28 | 2020-06-26 | 中国电建集团长春发电设备有限公司 | Medium-speed coal mill output calculation method of hydraulic variable-loading damping vibration attenuation control system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628246B (en) * | 2008-07-14 | 2011-12-21 | 上海建设路桥机械设备有限公司 | Hydraulic jaw crusher |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3443716A1 (en) * | 1984-11-30 | 1986-06-05 | Deutsche Babcock Werke AG, 4200 Oberhausen | ROLL BOWL MILL |
| JPH09308834A (en) * | 1996-05-20 | 1997-12-02 | Babcock Hitachi Kk | Press mechanism of roller type crusher |
| JPH11285649A (en) * | 1998-04-01 | 1999-10-19 | Babcock Hitachi Kk | Roller mill |
| JP2000135446A (en) * | 1998-11-02 | 2000-05-16 | Babcock Hitachi Kk | Roller mill |
| CN1307002C (en) * | 2005-04-28 | 2007-03-28 | 沈阳重型机械集团有限责任公司 | Hydraulic variable loading system for roller-plate coal mill |
| CN2805926Y (en) * | 2005-07-07 | 2006-08-16 | 北京中冶迈克液压有限责任公司 | Hydraulic pressurization system of vertical mill |
| CN2875588Y (en) * | 2006-02-22 | 2007-03-07 | 长春发电设备有限责任公司 | Medium speed coal mill |
-
2006
- 2006-12-28 CN CNB2006101708060A patent/CN100446862C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941141A (en) * | 2012-11-28 | 2013-02-27 | 北京电力设备总厂 | Roller ring mill |
| CN102941141B (en) * | 2012-11-28 | 2014-11-26 | 北京电力设备总厂 | intermediate-speed roller ring mill |
| CN106890705A (en) * | 2017-04-18 | 2017-06-27 | 长春发电设备总厂 | A kind of medium-speed pulverizer |
| CN111339666A (en) * | 2020-02-28 | 2020-06-26 | 中国电建集团长春发电设备有限公司 | Medium-speed coal mill output calculation method of hydraulic variable-loading damping vibration attenuation control system |
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| Publication number | Publication date |
|---|---|
| CN100446862C (en) | 2008-12-31 |
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Effective date of registration: 20180321 Address after: No. 3388 century street, Changchun Economic Development Zone, Jilin Province, Jilin Patentee after: China Electric Construction Group Changchun power generation equipment Co., Ltd. Address before: No. 588, Jinchuan street, Changchun economic and Technological Development Zone, Jilin, Jilin Patentee before: Changchun Generating Equipment Co., Ltd. |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Zhanguo Inventor after: Tao Nan Inventor after: Chi Zhengang Inventor after: Yuan Hongfei Inventor after: Zhang Xichun Inventor before: Li Zhanguo Inventor before: Yuan Hongfei |