CN103203271B - Dust-proof structure of bearing for classification wheel of jet mill - Google Patents
Dust-proof structure of bearing for classification wheel of jet mill Download PDFInfo
- Publication number
- CN103203271B CN103203271B CN201310138846.7A CN201310138846A CN103203271B CN 103203271 B CN103203271 B CN 103203271B CN 201310138846 A CN201310138846 A CN 201310138846A CN 103203271 B CN103203271 B CN 103203271B
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- bearing block
- bearing
- adapter sleeve
- rear end
- main shaft
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a dust-proof structure of a bearing for a classification wheel of a jet mill, wherein the center of the classification wheel is fixedly connected with a main shaft through a connecting cover, the connecting cover extends towards a bearing pedestal to form a ring of flow guide covers, the flow guide covers are arranged at the outer ring of the rear end face of the bearing pedestal and cover the rear end face of the bearing pedestal, the connecting cover is outwards provided with a ring of whirlwind pieces along the radial direction, the whirlwind pieces are arranged in the flow guide covers, the radial distances are available between the whirlwind pieces and the flow guide covers, the axial distances are available between the connecting cover and the whirlwind pieces, the radial distances are available between the flow guide covers and the rear end face of the bearing pedestal, the rear end face of the bearing pedestal consists of an annular plane perpendicular to the main shaft and an isometric pipe which backwards extends from the inner periphery of the annular plane, the annular plane is arranged at the front of the connecting cover and the whirlwind pieces, the isometric pipe is arranged at the front of the connecting cover, the rear end of the isometric pipe extends into the inner rings of the whirlwind pieces, and the radial distances are available between the isometric pipe and the whirlwind pieces. After the dust-proof structure is used, the material dust can not enter the bearing due to the self-centrifugal force, and an air source does not need to be externally connected, so that the use environment of the bearing is safe and reliable.
Description
Technical field
The invention belongs to airslide disintegrating mill field, be specifically related to the dustproof construction at the bearing place of grading wheel.
Background technology
During airslide disintegrating mill work, be all by compressed air is entered to pulverize cavity through nozzle high velocity jet, at the joint place of multiply high pressure draught, material is repeatedly collided, is rubbed, is sheared and pulverized, material after pulverizing moves to graded region with ascending air under blower fan draft effect, under the powerful centrifugal action producing at the grading wheel of High Rotation Speed, make thickness feed separation, meet the fine grained of granularity requirements by grading wheel discharging, coarse granule drops to disintegrating area to be continued to pulverize.Wherein, during grading wheel work, primary mixture is introduced into grading wheel inside, under the effect of centrifugal force, large or heavy particle centrifugalization power is large, therefore got rid of to grading wheel periphery to graded region limit wall, and be no longer subject to the impact of centrifugal force, naturally drop in pulverizer and continue to pulverize or drop to discharging opening to collect; Little or light material is subject to centrifugal action little, in the inner hovering of grading wheel, is subject to the windage that draws of air-introduced machine to be taken to eminence, along Flows, to next assembly, is graded or collects.Rotating speed by regulating grading wheel is the size of centrifugal force in capable of regulating grader just, reaches the object of the material that separates designated size.The structure of grading wheel as shown in Figure 1, comprise front impeller base 11, rear impeller base 12 and be fixedly connected on the circle of one between forward and backward impeller base blade 13, between adjacent blade, there is charging seam, the inner side of a plurality of blades forms cavity, be that material is to enter and go out from centre from the periphery of grading wheel, as shown in the direction of arrow in figure.
In prior art, grading wheel is fixedly connected on main shaft in center by adapter sleeve, and main shaft connects external impetus equipment, and the interior ring of bearing is fixedly connected on main shaft and outer shroud is fixedly connected on bearing block, and the barrel of bearing block and airslide disintegrating mill is rigidly connected.Between bearing block and bearing, between bearing block and main shaft, all there is gap, in order to prevent the material powder of grading wheel discharging place from causing enter bearing along gap under the effect of pressure in bearing to block even to block, affecting main shaft rotates, generally between main shaft and bearing block, to adopt dynamic seal ring and static sealing ring match to reach not only sealed bearing but also do not affect the effect that main shaft rotates, but, use moving, the structure of static sealing ring fitted seal is more complicated often, installation accuracy is had relatively high expectations, and moving, between static sealing ring, friction can produce heat, moreover, such structure is also not easy to implement and maintenance.Also have at bearing block, on the inner face of main shaft, annular groove is set, by pass into gases at high pressure in described annular groove, carry out hermetic seal, this hermetic seal is to simplify the structure than dynamic and static sealing ring, also stoped to a certain extent powder to enter in bearing through gap, but the pathway structure of the gases at high pressure that it relies on also can increase the complexity of structure, processing and installation, to actual needs, makes troubles.
Summary of the invention
In order to address the above problem, the invention provides a kind of airslide disintegrating mill grading wheel place bearing dustproof construction, airslide disintegrating mill grading wheel of the present invention place bearing dustproof construction utilizes self structure feature to produce centrifugal force and enters bearing to prevent material dust, without external gas source, make bearing environment for use safe and reliable, again and simple in structure, easy to implement.
The present invention for the technical scheme that solves its technical problem and adopt is:
A kind of airslide disintegrating mill grading wheel place bearing dustproof construction, grading wheel is fixedly connected on main shaft in the center by adapter sleeve, it is outer and connect external impetus equipment that main shaft is piercing in the barrel of airslide disintegrating mill, the interior ring of bearing is fixedly connected on main shaft and outer shroud is fixed on bearing block, the barrel of bearing block and airslide disintegrating mill is rigidly connected, between bearing block and bearing and between bearing block and main shaft, all there is gap, described bearing block is for being bearing block rear end face towards the coverage rate of described adapter sleeve in the coverage rate of described bearing, described adapter sleeve is extended with a circle kuppe towards described bearing block direction, described kuppe is positioned at the outer ring of described bearing block rear end face and covers described bearing block rear end face, described adapter sleeve is radially outward provided with a circle whirlwind sheet, described one circle whirlwind sheet in described kuppe and and kuppe between there is radial spacing, between described adapter sleeve and described whirlwind sheet and described bearing block, there is axial spacing, between described kuppe and described bearing block rear end face, there is radial spacing, described bearing block rear end face be by the ring plain vertical with described main shaft and from the inner periphery of ring plain backward the extended equal pipe of one form, described ring plain is positioned at the place ahead of described adapter sleeve and described whirlwind sheet, described equal pipe is positioned at the inner ring that the place ahead of described adapter sleeve and the rear end of equal pipe are inserted into a described circle whirlwind sheet, and there is radial spacing between described equal pipe and described whirlwind sheet.
The present invention for the further technical scheme that solves its technical problem and adopt is:
Described kuppe be isometrical tubulose and with described adapter sleeve concentric.
Described adapter sleeve, described kuppe and described whirlwind sheet are one-body molded.
The front-end and back-end of described whirlwind sheet are all the straight flanges vertical with described main shaft, and the inner of described whirlwind sheet is connected in described adapter sleeve, and the outer end of described whirlwind sheet is the hypotenuse being tilted near main shaft forward by right back.
The invention has the beneficial effects as follows: airslide disintegrating mill grading wheel of the present invention place bearing dustproof construction is mainly that kuppe and whirlwind sheet are set on adapter sleeve, kuppe can to a certain degree stop that dust enters, whirlwind sheet utilizes centrifugal force that dust is thrown away outside kuppe while rotating together with main shaft, further play dustproof effect, compared to prior art, the present invention is not only simple in structure, be beneficial to enforcement, and without external gas source, reduced energy consumption, can guarantee that bearing environment for use is safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation that partly cuts open of the present invention.
The specific embodiment
Embodiment: a kind of airslide disintegrating mill grading wheel place bearing dustproof construction, grading wheel 1 is fixedly connected on main shaft 3 in the center by adapter sleeve 2, it is outer and connect external impetus equipment that main shaft 3 is piercing in the barrel of airslide disintegrating mill, the interior ring of bearing 4 is fixedly connected on main shaft 3 and outer shroud is fixed on bearing block 5, bearing block 5 is rigidly connected with the barrel of airslide disintegrating mill, between bearing block 5 and bearing 4 and between bearing block 5 and main shaft 3, all there is gap, described bearing block 5 is for being bearing block rear end face towards the coverage rate of described adapter sleeve 2 in the coverage rate of described bearing 4, described adapter sleeve 2 is extended with a circle kuppe 6 towards described bearing block 5 directions, described kuppe is positioned at the outer ring of described bearing block rear end face and covers described bearing block rear end face, described adapter sleeve 2 is radially outward provided with a circle whirlwind sheet 7, described one circle whirlwind sheet 7 in described kuppe 6 and and kuppe between there is radial spacing, between described adapter sleeve 2 and described whirlwind sheet 7 both and described bearing block 5, there is axial spacing, between described kuppe 6 and described bearing block rear end face, there is radial spacing, described bearing block rear end face be by the ring plain 521 vertical with described main shaft 3 and from the inner periphery of ring plain backward the extended equal pipe 522 of one form, described ring plain 521 is positioned at the place ahead of described adapter sleeve 2 and described whirlwind sheet 7, described equal pipe 522 is positioned at the inner ring that the place ahead of described adapter sleeve 2 and the rear end of equal pipe 522 are inserted into a described circle whirlwind sheet 7, and there is radial spacing between described equal pipe 522 and described whirlwind sheet 7.
Described kuppe 6 be isometrical tubulose and with described adapter sleeve 2 concentrics.
Described adapter sleeve 2, described kuppe 6 and described whirlwind sheet 7 are one-body molded.
The front-end and back-end of described whirlwind sheet 7 are all the straight flanges vertical with described main shaft 3, and the inner of described whirlwind sheet 7 is connected in described adapter sleeve 2, and the outer end of described whirlwind sheet 7 is the hypotenuses that tilted near main shaft 3 forward by right back.
Claims (1)
1. an airslide disintegrating mill grading wheel place bearing dustproof construction, grading wheel (1) is fixedly connected on main shaft (3) in the center by adapter sleeve (2), it is outer and connect external impetus equipment that main shaft (3) is piercing in the barrel of airslide disintegrating mill, the interior ring of bearing (4) is fixedly connected on main shaft (3) and outer shroud is fixed on bearing block (5), bearing block (5) is rigidly connected with the barrel of airslide disintegrating mill, between bearing block (5) and bearing (4) and between bearing block (5) and main shaft (3), all there is gap, it is characterized in that: described bearing block (5) is for being bearing block rear end face towards the coverage rate of described adapter sleeve (2) in the coverage rate of described bearing (4), described adapter sleeve (2) is extended with a circle kuppe (6) towards described bearing block (5) direction, described kuppe is positioned at the outer ring of described bearing block rear end face and covers described bearing block rear end face, described adapter sleeve (2) is radially outward provided with a circle whirlwind sheet (7), described one circle whirlwind sheet (7) be positioned at described kuppe (6) and and kuppe between there is radial spacing, between described adapter sleeve (2) and described whirlwind sheet (7) both and described bearing block (5), there is axial spacing, between described kuppe (6) and described bearing block rear end face, there is radial spacing, described bearing block rear end face be by the ring plain (521) vertical with described main shaft (3) and from the inner periphery of ring plain backward the extended equal pipe of one (522) form, described ring plain (521) is positioned at the place ahead of described adapter sleeve (2) and described whirlwind sheet (7), described equal pipe (522) is positioned at the inner ring that the place ahead of described adapter sleeve (2) and the rear end of equal pipe (522) are inserted into a described circle whirlwind sheet (7), and there is radial spacing between described equal pipe (522) and described whirlwind sheet (7), described kuppe (6) be isometrical tubulose and with described adapter sleeve (2) concentric, described adapter sleeve (2), described kuppe (6) and described whirlwind sheet (7) are one-body molded, the front-end and back-end of described whirlwind sheet (7) are all the straight flanges vertical with described main shaft (3), the inner of described whirlwind sheet (7) is connected in described adapter sleeve (2), the outer end of described whirlwind sheet (7) is the hypotenuse being tilted near main shaft (3) forward by right back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310138846.7A CN103203271B (en) | 2013-04-19 | 2013-04-19 | Dust-proof structure of bearing for classification wheel of jet mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310138846.7A CN103203271B (en) | 2013-04-19 | 2013-04-19 | Dust-proof structure of bearing for classification wheel of jet mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103203271A CN103203271A (en) | 2013-07-17 |
| CN103203271B true CN103203271B (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310138846.7A Expired - Fee Related CN103203271B (en) | 2013-04-19 | 2013-04-19 | Dust-proof structure of bearing for classification wheel of jet mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN103203271B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061245A (en) * | 2014-05-09 | 2014-09-24 | 安徽安风风机有限公司 | Rolling bearing axial follower of main shaft |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2263554Y (en) * | 1996-05-21 | 1997-10-01 | 中国石油化工总公司 | Turbine powdery particle classificator |
| CN2319118Y (en) * | 1997-11-14 | 1999-05-19 | 冶金工业部长沙矿冶研究院 | Rotor type centrifugal crusher |
| CN2579522Y (en) * | 2002-09-04 | 2003-10-15 | 江永镜 | High speed wortex super fine crahsing self mill |
| CN101164707A (en) * | 2007-08-30 | 2008-04-23 | 宁波科宁达工业有限公司 | Classifying system for airflow mill |
| CN102274826A (en) * | 2011-05-06 | 2011-12-14 | 桂林恒达矿山机械有限公司 | Superfine turbine classifier |
| CN203245022U (en) * | 2013-04-19 | 2013-10-23 | 昆山聚贝机械设计有限公司 | Dustproof structure for bearing at classified wheel of airflow pulverizer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7063193B2 (en) * | 2002-09-25 | 2006-06-20 | Tochigi Fuji Sangyo Kabushiki Kaisha | Seal structure for relatively rotational members |
| JP2011051377A (en) * | 2009-08-31 | 2011-03-17 | Nsk Ltd | Steering device |
-
2013
- 2013-04-19 CN CN201310138846.7A patent/CN103203271B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2263554Y (en) * | 1996-05-21 | 1997-10-01 | 中国石油化工总公司 | Turbine powdery particle classificator |
| CN2319118Y (en) * | 1997-11-14 | 1999-05-19 | 冶金工业部长沙矿冶研究院 | Rotor type centrifugal crusher |
| CN2579522Y (en) * | 2002-09-04 | 2003-10-15 | 江永镜 | High speed wortex super fine crahsing self mill |
| CN101164707A (en) * | 2007-08-30 | 2008-04-23 | 宁波科宁达工业有限公司 | Classifying system for airflow mill |
| CN102274826A (en) * | 2011-05-06 | 2011-12-14 | 桂林恒达矿山机械有限公司 | Superfine turbine classifier |
| CN203245022U (en) * | 2013-04-19 | 2013-10-23 | 昆山聚贝机械设计有限公司 | Dustproof structure for bearing at classified wheel of airflow pulverizer |
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| Publication number | Publication date |
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| CN103203271A (en) | 2013-07-17 |
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