CN202921542U - Roller screen - Google Patents
Roller screen Download PDFInfo
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- CN202921542U CN202921542U CN 201220503026 CN201220503026U CN202921542U CN 202921542 U CN202921542 U CN 202921542U CN 201220503026 CN201220503026 CN 201220503026 CN 201220503026 U CN201220503026 U CN 201220503026U CN 202921542 U CN202921542 U CN 202921542U
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- roller
- bearing
- sieve
- roller bearing
- housing
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Abstract
The utility model discloses a roller screen. The roller screen comprises a shell body, multiple rollers arranged on the shell body, and a screen piece arranged on the rollers in a sleeved mode, wherein the screen piece comprises a circular main body part connected with the rollers, and multiple blades distributed on the outer circle of the main body part and tilting towards the same rotating direction, and contours of the blades are all in a parabola shape. Due to the facts that the blades are arranged in a parabola shape and all arranged obliquely, when materials of raw coals, chunks, sundries and the like enter into equipment, depending on the rotating centrifugal force effect of the rollers, the materials are thrown out towards the tilt direction to the maximum degree, upper motion of block materials to coal flow is benefited, a hard stone larger than an interval of adjacent rollers in size can be prevented from being stuck in two adjacent screen pieces, and equipment stability and screening effects of the roller shaft are ensured.
Description
Technical field
The utility model relates to thermal power generating technology field, particularly a kind of roller picker.
Background technology
The heat that thermal power generation produces when referring to utilize solid, liquid, the gas fuel combustions such as coal, oil, natural gas converts a kind of generation mode of electric energy to by generation power device.Due to the coal amount aboundresources of China, therefore, at present, domestic thermal power plant is all to rely on burning coal to obtain electric power usually.
Due to the fire coal that is transported to the power plant, the overwhelming majority is the raw coal that there is no screening, its granularity and in raw coal production and transportation, has a large amount of wooden units, stone, rag, straw, thin wood and the soft foreign material of cellulosic and is entrained in coal between 0-300mm.
In order to improve coal-fired utilization rate, need to before raw coal enters boiler, it be sieved and fragmentation, make its epigranular, composition is clean.At present, the above unit of domestic 300MW uses screening plant mostly to be probability screen, roller picker, vibratory sieve etc.Wherein, roller picker have arrangement space little, exert oneself large, screening effect is high and invest the characteristics such as low, obtain using comparatively widely in the raw coal screening plant in thermal power plant.
As shown in Figure 1, traditional roller picker mainly comprises and is arranged on the many roller bearings 103 on sieve nest and is arranged on sieve 101 on every roller bearing 103, and the plum blossom-shaped sieve that adopts with wedge angle groove 102 of sieve 101.The material such as raw coal and bulk foreign material is upwards dished out by sieve in rotary course, almost vertically falls by gravity.For the effect that realizes sieving, leave the gap between the sieve 101 on every two-stage roller bearing 103.During work, roller bearing 103 is by motor-driven, thereby drive roller bearing 103 rotations, and this direction of rotation is pointed to outlet 105 by entrance 104, raw coal enters from the entrance 104 of roller picker, qualified particle falls the gap between two adjacent sieves, and is positioned at coal bunker 106 collections of below, is transported to boiler combustion.Bulk materials enters the coal breaker fragmentation after being transferred to the outlet 105 of roller picker always.
But, due to the plum blossom-shaped structure of sieve 101, form a series of angular groove 102 of being with on sieve 101.Interlaced arrangement sieve 101 on two adjacent roller bearings 103, in motion process, at first above-mentioned two grooves, 102 dislocation form a larger initial space relatively; Then along with the rotation of sieve 101, the relative initial space of above-mentioned two grooves 102 diminishes gradually, when larger hard stone enters the motion of sieve working face, when it can not be taken to subordinate's roller bearing by the sieve rotary centrifugal force, and when size can not fall from the gap of 101 of adjacent sieves, can be squeezed along with dwindling of initial space, will be blocked by the sieve 101 on adjacent two roller bearings 103, hinder adjacent sieve 101 and rotatablely move.After sieve 101 is stuck, be easy to cause the problem of apparatus overload tripping operation or damage drive motors, have a strong impact on stability and the screening effect of equipment.
Therefore, how providing a kind of roller picker, avoid stuck phenomenon, to improve the stability of equipment, is the present technical issues that need to address of those skilled in the art.
The utility model content
The purpose of this utility model is to provide a kind of roller picker, avoids stuck phenomenon, to improve the stability of equipment.
For solving the problems of the technologies described above, the utility model provides following technical scheme:
A kind of roller picker comprises housing, is arranged on a plurality of roller bearings on described housing and is set in sieve on described roller bearing,
Described sieve comprises the circular body part that is connected with described roller bearing and is arranged in the outer ring of described main part and a plurality of blades that tilt to same direction of rotation, and the profile of described blade is parabola shaped.
Preferably, in above-mentioned roller picker, described sieve adopts NM400 ~ 500 abrasion-resistant stee sieves.
Preferably, in above-mentioned roller picker, the bearing block of described roller bearing is elasticity lower margin bearing.
Preferably, in above-mentioned roller picker, described elasticity lower margin bearing comprises the polyurethane block and the spring base that is connected with described polyurethane block for fixing described bearing.
Preferably, in above-mentioned roller picker, the shaft coupling that is connected with described roller bearing is LAK type saddle type piece yielding coupling.
Preferably, in above-mentioned roller picker, also comprise the seal be used to the junction that seals described roller bearing and described housing.
Preferably, in above-mentioned roller picker, described hermetically-sealed construction comprises and is positioned at hull outside and is set in successively clamping rings, sealing rubber ring and compression annulus on described roller bearing;
Wherein, described clamping rings is fixedly connected with described housing, and described sealing rubber ring and compression annulus and described clamping rings are bolted.
Preferably, in above-mentioned roller picker, also comprise the taper seal that is positioned at described housing inboard;
Described taper seal specifically comprises with described roller bearing and being fixedly connected with, and opening points to the taper steel plate of described housing, and an end is arranged on described taper steel plate, the other end and the contacted conical seal ring of described housing.
Preferably, in above-mentioned roller picker, also comprise the deflector that is arranged on described taper seal top, an end of described deflector is arranged on described housing, and the other end bends downwards, and described deflector blocks described conical seal ring.
Can find out from above-mentioned technical scheme, the utility model provides a kind of roller picker, comprise housing, be arranged on a plurality of roller bearings on housing and be set in sieve on roller bearing, wherein, sieve comprises the circular body part that is connected with roller bearing and is arranged in the outer ring of main part and a plurality of blades that tilt to same direction of rotation, and the profile of blade is parabola shaped.The utility model is set to parabola shaped structure by blade, and all be in tilted layout, when making the materials such as raw coal and bulk foreign material drop between adjacent sieve, rely on the effect of roller bearing rotary centrifugal force, material is dished out to the direction that tilts to greatest extent, be conducive to lump material to the top motion of coal stream, can prevent that size is stuck in two adjacent sieves greater than the hard stone in the gap of adjacent roller bearing, thereby guarantee stabilization of equipment performance and the screening effect of roller picker.
Description of drawings
Fig. 1 is the structural representation of roller picker in prior art;
Fig. 2 is the stuck schematic diagram of sieve in prior art;
The work schematic diagram of the sieve that Fig. 3 provides for the utility model embodiment;
The structural representation of the roller picker that Fig. 4 provides for the utility model embodiment;
Fig. 5 is the partial enlarged drawing of A in Fig. 4.
Fig. 6 is elasticity lower margin bearing.
The specific embodiment
The utility model core is to provide a kind of parabolic roller picker, avoids stuck phenomenon, to improve the stability of equipment.
In order to make those skilled in the art person understand better the utility model scheme, the utility model is described in further detail below in conjunction with drawings and embodiments.
Please refer to Fig. 3-Fig. 4, the utility model discloses a kind of parabolic roller picker, comprise housing, be arranged on a plurality of roller bearings 3 on housing and be set in sieve 2 on roller bearing 3, wherein, sieve 2 comprises the circular body part 201 that is connected with roller bearing 3 and the outer ring that is arranged in main part 201 and a plurality of blades 202 that tilt to same direction of rotation, and the profile of blade 202 is parabola shaped.
The utility model is by being set to parabola shaped structure with blade 202, and all be in tilted layout, when making the materials such as raw coal and bulk foreign material drop between adjacent sieve, rely on the effect of roller bearing rotary centrifugal force, material is thrown to the place ahead about 45 degree to greatest extent, be conducive to lump material to the top motion of coal stream, can prevent that size is stuck in two adjacent sieves greater than the hard stone in the gap of adjacent roller bearing, thereby guarantee stabilization of equipment performance and the screening effect of roller picker.
When practical operation, there are projection or wedge angle position for fear of the blade 202 of sieve 2, and cause stuck phenomenon, the operator can carry out rounding to blade 202 according to the processing needs and eliminate the operation of wedge angle.
When practical application, dish out to Way out to greatest extent in order to guarantee the materials such as raw coal, and guarantee enough height of kicking up, the working face of sieve becomes corresponding parabolic according to parameter designing such as coal flow, sieve tooth trace speed, material characteristics, in use, can be to greatest extent with material along the place ahead of throwing to 45 degree left and right, be conducive to lump material to the top motion of coal stream, reduced to greatest extent between two groups of corresponding sieves because choking the stone clamping stagnation.It will be appreciated by persons skilled in the art that in actual production, can require to arrange accordingly according to different angles angle of inclination and the parabolic shape of blade 202, and all in the present embodiment protection domain.
In screening process, material can constantly impact and collision sieve 2 due to this roller picker, and therefore, the material with sieve 2 in the present embodiment is NM400 ~ 500 abrasion-resistant stees, to improve hardness and the wearability of sieve 2.Due to NM abrasion-resistant stee own characteristic, can reduce the wearing and tearing of blade 201 and reduce problem on deformation, can reach more than 5000 hours its service life, is more suitable in the more inland power plant of stone, gangue, foreign material.
In actual production, the thickness of sieve 2 is in the situation that satisfy requirement of strength and accomplish the thinnest, preferably, thickness is 10mm, is 1/2 or 1/3 of traditional sieve, when coal stream is carried in rotation, coal stream there are cutting, shear action, can will be wherein the bulk chopping such as gangue, directly become qualified particle screening, improved roller picker to the raw coal sieving capacity, reduce simultaneously entering the coal breaker bulk, improve coal breaker service life.
Adjacent sieve 2 clamping stagnations are to form triangle between stuck point due to the center of adjacent roller bearing 3 and fixture block, and for fear of stable leg-of-mutton appearance, the bearing block that supports roller bearing 3 in the present embodiment is set to elasticity lower margin bearing 4.Can make when roller bearing 3 and fixture block block by above-mentioned setting, roller bearing 3 rotations are obstructed, power is delivered on bearing spider, spring contraction distortion when elasticity lower margin bearing 4 springs are subject to external applied load, the center of roller bearing 3 changes, thereby adjacent roller bearing 3 and the triangle that fixture block forms are broken, made it become quadrangle, further reduced the appearance of the problem of adjacent roller bearing 3 clamping stagnation stones.
In preferred embodiment, elasticity lower margin bearing 4 comprises the polyurethane block and the spring base that is connected with polyurethane block for rigid bearing.It will be understood by those skilled in the art that; also can be set to the analog materials such as rubber by polyurethane block in actual production; or bearing arranges the elastic foundations such as spring, so long as can realize that the variation of roller bearing 3 centers gets final product, and all in the present embodiment protection domain.
Further in embodiment, the shaft coupling that is connected with roller bearing 3 is set to LAK type saddle type piece yielding coupling.Due to after adjacent two sieves, 2 clamping stagnation stones, be easy to drive motors or reductor overload are damaged, guarantee driving mechanism stable operation in order to reduce clamping stagnation, the shaft coupling that is connected with roller bearing 3 in the present embodiment is set to yielding coupling.It will be appreciated by persons skilled in the art that owing to also may being provided with reductor between motor and roller bearing, therefore, the shaft coupling between the three all can be set to yielding coupling in practical operation.
Please refer to shown in Figure 5, when having the gap between roller bearing 3 and housing, the material of screening probably impact with motion process in discharge housing by the gap, material is caused waste.In view of the above problems, the roller picker that the present embodiment provides also comprises for the seal to the junction of roller bearing 3 and housing, realizing the sealing between housing and roller bearing, thereby reduces the waste to material.
In preferred embodiment, the seal comprises and is positioned at hull outside and is set in successively clamping rings 51 on roller bearing 3, sealing rubber ring 52 and compresses annulus 53; Clamping rings 51 is fixedly connected with housing, in a kind of specific embodiment that the utility model provides, is specially welding; Sealing rubber ring 52 be connected annulus 53 and be connected with clamping rings 51 by bolt.By the sealing structure, make sealed rubber ring 52 sealings in gap between roller bearing 3 and housing, prevented that sieve axle 3 two ends and housing crossover sites gap location from outwards spilling coal.
Further in embodiment, the seal also comprises the taper seal that is positioned at the housing inboard, this concrete taper seal comprises: be fixedly connected with roller bearing 3 and opening points to the taper steel plate 61 of housing, and one end be arranged on taper steel plate 61, the contacted conical seal ring 62 of the other end and housing.This taper steel plate 61 is welded on roller bearing 3, and it has determined the angle of the conical seal ring 62 that is attached thereto, and in actual production, this angle can be selected accordingly according to different needs, and all in the present embodiment protection domain.Can realize the sealing of roller bearing 3 and enclosure interior by this taper seal is set, thereby further increase sealing.
In specific embodiment, the material of this conical seal ring 62 is not done restriction, as long as can realize sealing, the preferred rubber seal that adopts in the present embodiment.Further, adopt polytetrafluoroethylene (PTFE) to make, sealing effectiveness is good, and antiwear property is strong.
In order to prevent raw coal to the impact of taper seal, also be provided with the deflector 7 that is positioned at taper seal top in the present embodiment, and an end of this deflector is arranged on housing, the other end bends downwards.The present embodiment is not done restriction to the concrete shape of this deflector 7.This deflector 7 can be guided to the raw coal that falls from the top in the course of work and be positioned at sieve 2 and cut and shear screening, can't pound and drop on conical seal ring 62, avoids the seal wearing and tearing that are hit, and has further promoted the sealing of this roller picker.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. roller picker comprises housing, is arranged on a plurality of roller bearings on described housing and is set in sieve on described roller bearing, it is characterized in that:
Described sieve comprises the circular body part that is connected with described roller bearing and is arranged in the outer ring of described main part and a plurality of blades that tilt to same direction of rotation, and the profile of described blade is parabola shaped;
Also comprise the seal be used to the junction that seals described roller bearing and described housing.
2. roller picker according to claim 1, is characterized in that, described sieve adopts NM400-500 abrasion-resistant stee sieve.
3. roller picker according to claim 1, is characterized in that, the bearing block of described roller bearing is elasticity lower margin bearing.
4. roller picker according to claim 3, is characterized in that, described elasticity lower margin bearing comprises the polyurethane block and the spring base that is connected with described polyurethane block for fixing described bearing.
5. roller picker according to claim 1, is characterized in that, the shaft coupling that is connected with described roller bearing is LAK type saddle type piece yielding coupling.
6. roller picker according to claim 1, is characterized in that, described hermetically-sealed construction comprises and is positioned at hull outside and is set in successively clamping rings, sealing rubber ring and compression annulus on described roller bearing;
Wherein, described clamping rings is fixedly connected with described housing, and described sealing rubber ring and compression annulus and described clamping rings are bolted.
7. roller picker according to claim 6, is characterized in that, also comprises the taper seal that is positioned at described housing inboard;
Described taper seal specifically comprises with described roller bearing and being fixedly connected with, and opening points to the taper steel plate of described housing, and an end is arranged on described taper steel plate, the other end and the contacted conical seal ring of described housing.
8. roller picker according to claim 7, is characterized in that, also comprises the deflector that is arranged on described taper seal top, and an end of described deflector is arranged on described housing, and the other end bends downwards, and described deflector blocks described conical seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220503026 CN202921542U (en) | 2012-09-27 | 2012-09-27 | Roller screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220503026 CN202921542U (en) | 2012-09-27 | 2012-09-27 | Roller screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202921542U true CN202921542U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220503026 Expired - Lifetime CN202921542U (en) | 2012-09-27 | 2012-09-27 | Roller screen |
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| Country | Link |
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| CN (1) | CN202921542U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848233A (en) * | 2013-10-14 | 2014-06-11 | 洛阳广盈机械设备有限公司 | Large block removing device for bucket wheel machine |
| CN104986511A (en) * | 2015-07-14 | 2015-10-21 | 孙立民 | Automatic sorting and feeding machine |
| CN105013703A (en) * | 2015-08-19 | 2015-11-04 | 内蒙古五二特种材料工程技术研究中心 | Bimetal wear-resisting screen sheet on crushing screening machine and manufacturing method of bimetal wear-resisting screen sheet |
| CN105057193A (en) * | 2015-07-17 | 2015-11-18 | 洛阳华晨重工机械有限公司 | Eccentric boost type roll screen |
| CN105537104A (en) * | 2016-01-18 | 2016-05-04 | 马奎山 | Coupling type comb type coal screening machine |
| CN115463820A (en) * | 2022-09-17 | 2022-12-13 | 南通联源机电科技股份有限公司 | Heavy roller screen capable of prolonging service life of bearing |
-
2012
- 2012-09-27 CN CN 201220503026 patent/CN202921542U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848233A (en) * | 2013-10-14 | 2014-06-11 | 洛阳广盈机械设备有限公司 | Large block removing device for bucket wheel machine |
| CN104986511A (en) * | 2015-07-14 | 2015-10-21 | 孙立民 | Automatic sorting and feeding machine |
| CN105057193A (en) * | 2015-07-17 | 2015-11-18 | 洛阳华晨重工机械有限公司 | Eccentric boost type roll screen |
| CN105013703A (en) * | 2015-08-19 | 2015-11-04 | 内蒙古五二特种材料工程技术研究中心 | Bimetal wear-resisting screen sheet on crushing screening machine and manufacturing method of bimetal wear-resisting screen sheet |
| CN105013703B (en) * | 2015-08-19 | 2017-03-08 | 内蒙古五二特种材料工程技术研究中心 | A kind of bimetal wear resistant sieve on crushing-screening machine and preparation method thereof |
| CN105537104A (en) * | 2016-01-18 | 2016-05-04 | 马奎山 | Coupling type comb type coal screening machine |
| CN105537104B (en) * | 2016-01-18 | 2019-03-08 | 马奎山 | Manifold type comb coal screen |
| CN115463820A (en) * | 2022-09-17 | 2022-12-13 | 南通联源机电科技股份有限公司 | Heavy roller screen capable of prolonging service life of bearing |
| CN115463820B (en) * | 2022-09-17 | 2023-11-03 | 南通联源机电科技股份有限公司 | Heavy roller screen for prolonging service life of bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
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| CX01 | Expiry of patent term |