CN201311190Y - Operation chain shaft system motion element floating support device of chain grate - Google Patents
Operation chain shaft system motion element floating support device of chain grate Download PDFInfo
- Publication number
- CN201311190Y CN201311190Y CNU2008202165780U CN200820216578U CN201311190Y CN 201311190 Y CN201311190 Y CN 201311190Y CN U2008202165780 U CNU2008202165780 U CN U2008202165780U CN 200820216578 U CN200820216578 U CN 200820216578U CN 201311190 Y CN201311190 Y CN 201311190Y
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- chain
- grate
- shaft
- plate
- side plate
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Abstract
The utility model discloses an operation chain shaft system motion element floating support device of chain grate, relating to the key instrument of pellet product line such as chain grate, mainly applied for pellet burden production of blast furnace smelting, which is characterized in that a small shaft is axially provided with a grate plate support shaft sleeve and a support shaft sleeve short tube, a support shaft sleeve of chain element and a support shaft sleeve of side plate; two ends of the small shaft are provided with split pins for positioning the whole operation chain on the small shaft. The utility model adopts the support shaft sleeves with expansion seams to realize floating positioning and bearing on the motion elements on the shaft system of operation chain grate hearth of chain grate, such as chain element, grate plate, side plate and the like, to make the structure of operation chain compact, and realize uniform and stable seams between shaft and chain element, shaft and grate plate, shaft and side plate, thereby resolving the problems such as that the chain element is bitten by the chain wheel of grate chain, the grate plate cannot be returned or dropped, and the grate hearth has material leakage or deflection, to realize normal operation of chain grate under alternative high and low temperatures.
Description
Technical field
The utility model relates to the key equipment drying grate of pelletizing mineral aggregate production line, and relevant drying grate core operation chain grate bed axle is fastened motion parts floating support device, is used for the pellet furnace charge production of blast furnace process.
Background technology
Grate kiln-central cooler is a furnace charge of producing blast furnace process--one of main technique method of pelletizing mineral aggregate.Drying grate is one of key equipment of producing pellet, be the equipment that green-ball is carried out dry and preheating, green-ball through broadband belt feeder and roll-type material distributing machine equably cloth to drying grate upside operation chain top, be fed forward with operation chain cycle operation, the drying grate duct shield dryer section and the preheating section that raise gradually through excess temperature, progressively drying, dehydration and preheating unloaded to rotary kiln by the shovel flitch at exhaust end, and drying grate downside operation chain returns operation under lower normal temperature environment.The operation chain is the drying grate core, supports by upper and lower support roller, drives running by main transmission.The operation chain combines by the traction chain link, and every section by little axle supporting chain section, grate plate and side plate etc.
The operation that in the alternating temperature-changing field, moves in circles of drying grate operation chain, can not cool, variations in temperature in the running, to cause convergent-divergent to change, on the one hand, because temperature, material is different with structure, upward each part axis hole swell increment is different with little axle to cause moving the little axle of chain, cause radially stuck easily or distortion, because little axle is different with the operating temperature of final drive shaft and upper-supporting wheel axle, make the operation chain axially be offset on the other hand, cause the big little axle of side-play amount final drive shaft that upward chain link and side-play amount are little and upper-supporting wheel axle upper sprocket wheel engagement shaft to dislocation, cause chain rotation browsing chain link, link wear fracture or appearance " riding donkey " phenomenon.For this reason, must guarantee the little axle of operation chain on the structural design and on it between each part the gap as far as possible little, guarantee reliable, the efficiency of transmission height; Must be able to float again, suitably regulate gap between the part, prevent that the gap is too small and cause being installed in little axle and go up crimp between the grate plate, can't reset or come off; Otherwise excesssive gap, the bed that causes combing are lost or problem such as sideslip.
Data of literatures has at present: the drying grate operation chain grate bed of a kind of flexible axis structure of a disclosed patent " the drying grate flexible axle is combed bed (02158571.7) ", be by between chain link and major axis, adding lining, with lining chain link is linked to be string, bear the operation pulling force, laterally connecting axle adopts slender flexible shaft, to control pitch variation and to compensate the synchro-meshing deviation voluntarily, make many chains on the whole bed of combing simultaneously stressed.Utility model patent " drying grate sprocket mesh gear (200520051391.6) " is installed on the axle sleeve by chain link, and distance sink tube is arranged between the axle sleeve, makes the distance of chain internode keep matching with sprocket.Above method only the little axle of minor betterment operation chain its go up each part axial side-play amount, can not the above problems of basic solution, guarantee the operate as normal of whole drying grate.Do not consider simultaneously chain link and grate plate unsteady support problem on little axle yet.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and disclosing a kind of chain grate machine operating chain-shaft is motion parts floating support device.
Said chain grate machine operating chain-shaft is a motion parts floating support device, be on little axle, to be provided with grate plate bolster sleeve pipe and supporting sleeve short tube vertically successively, the bolster sleeve pipe of chain link, the bolster sleeve pipe of side plate is provided with whole service chain located opening pin on little axle at the two ends of little axle.
Installation shaft is to the supporting grate plate pipe spreader that can have certain limit to move, supporting chain section pipe spreader, supporting side plate pipe spreader method on little axle, long little axle is divided into several short axle sleeves, and between supporting grate plate pipe spreader, supporting chain section pipe spreader and supporting side plate pipe spreader, be provided with certain interval, on supporting grate plate pipe spreader, supporting chain section pipe spreader and supporting side plate pipe spreader, have a certain size dilatation joint, thereby make chain link, grate plate and side plate axially can suitably float, the realization axle is fastened the related components floating support.A concrete scheme is to have the expansion slit, width 5.2mm at grate plate supporting grate plate pipe spreader and supporting sleeve short tube; The chain links support pipe spreader has the expansion slit, width 6.3mm; Have the expansion slit on the side plate bolster sleeve pipe, width 2.0mm.
Have on supporting grate plate pipe spreader, supporting chain section pipe spreader and the supporting side plate pipe spreader and concern between the reduction δ of gap between dilatation joint width B and pipe spreader radius R and the parts such as pipe spreader external diameter and chain link and be:
B＝2(R
2-(R-δ)
2)
1/2 (1)
Little axle of drying grate operation chain and axle sleeve, axle sleeve and chain link, grate plate, side plate on it are directly proportional with radius, thermal coefficient of expansion and temperature appreciation in the radial thermal expansion amount, represent with following formula here:
ΔL＝RαΔt (2)
In the formula, Δ L line swell increment/mm, radius/mm before R expands, the α linear expansion coefficient, Δ t temperature lift-off value/℃.
Because the little axle of operation chain, axle sleeve, chain link, grate plate and side plate are all different on thermal coefficient of expansion, temperature appreciation and radius size, cause moving that the gap changes between the little axle of chain and axle sleeve, axle sleeve and chain link, axle sleeve and grate plate and axle sleeve and the side plate in operating temperature alternation change procedure, even disappearance.Move to axial between the little axle of influence operation chain and axle sleeve, axle sleeve and chain link, axle sleeve and grate plate, axle sleeve and the side plate.
By to the thermal expansion amount designing and calculating, fasten relevant motion component structural size taking all factors into consideration the operation chain rivet, range of temperature and material thermal expansion coefficient, application has the bolster sleeve pipe of dilatation joint drying grate operation chain grate bed axle is fastened chain link, grate plate, motion parts such as the side plate positioning support that floats, make and move the chain structure compactness, axle and chain link, axle and grate plate, axle and side plate gap stable and uniform, solve drying grate chain rotation browsing chain link, grate plate can't reset or come off, the bed of combing leaks problems such as material or sideslip, realizes drying grate normally operation under high low temperature alternation environment.
The utility model has the advantages that: chain grate machine operating chain-shaft is that radial and axial gap determines reliable, prevents chain rotation browsing chain link, bed " riding donkey " phenomenon of combing and the bed of combing leak problems such as material or sideslip, improved the drying grate operational reliability.
Description of drawings
Fig. 1 is the little axle of drying grate operation chain one a side structure partial schematic diagram.
Among Fig. 1,1. move chain; 2. grate plate; 3. chain link; 4. side plate; 5. little axle; 8. split pin; 9. the bolster sleeve pipe of side plate; 10. the bolster sleeve pipe of chain link; 11. grate plate supporting sleeve short tube; 12. grate plate bolster sleeve pipe.
The specific embodiment
Assembling total graph structure, size and material according to B4.5 * 60m drying grate operation chain, to carry out chain grate machine operating chain-shaft be that motion parts floating support device is implemented.
The material of the little axle of drying grate operation chain is that the material of 12CrMoV, grate plate axle sleeve is that the material of 15CrMo, chain link axle sleeve is 30CrMoV, the material of side plate axle sleeve is ZG35CrMo, the material of chain link, grate plate and side plate is a heat resisting cast steel, by material and temperature change scope thereof, the linear expansion coefficient and the actual experiment data of the material that provides according to document, the linear expansion coefficient α that gets little axle is 17.5 * 10
-6℃
-1, the linear expansion coefficient α of grate plate axle sleeve is 17 * 10
-6℃
-1, the linear expansion coefficient α of chain link axle sleeve is 16 * 10
-6℃
-1, the linear expansion coefficient α of side plate axle sleeve is 14 * 10
-6℃
-1, the linear expansion coefficient α of chain link, grate plate and side plate is 13 * 10
-6℃
-1
Little axle radius R 20, grate plate and side plate axle sleeve radius R 21-27, grate plate and side plate inside radius R28, chain link axle sleeve radius R 21-35, chain link inside radius R35, the little axle of operation chain from 30 ℃ of normal temperature enter dry I section, dry II section, preheating I section, preheating II section, up to final drive shaft, temperature progressively is elevated to 700 ℃, Δ t=670 ℃, calculate by formula (1), obtain:
Little axle radius swell increment Δ L reaches 0.2345mm.
Grate plate and side plate axle sleeve inside radius swell increment Δ L are respectively 0.2392mm and 0.1970mm, and outer radius swell increment Δ L is respectively 0.3075mm and 0.2533mm.
Chain link axle sleeve inside radius swell increment Δ L is 0.2251mm, and outer radius swell increment Δ L is 0.3752mm.
Grate plate and side plate inside radius swell increment Δ L are 0.2439mm.
Chain link inside radius swell increment Δ L is 0.3049mm.
The expansion post gap changes:
0.2345mm-0.2251mm is reduced in gap between chain link axle sleeve and the little axle, i.e. 0.094mm, and 0.3752mm-0.3049mm, i.e. 0.070mm are reduced in gap between chain link axle sleeve and the chain link;
Gap between grate plate axle sleeve and the little axle increases 0.2392mm-0.2345mm, i.e. 0.005mm, and 0.3075mm-0.2439mm, i.e. 0.064mm are reduced in gap between grate plate axle sleeve and the grate plate;
0.2345mm-0.1970mm is reduced in gap between side plate axle sleeve and the little axle, i.e. 0.038mm, and 0.2533mm-0.2439mm, i.e. 0.009mm are reduced in gap between side plate axle sleeve and the side plate.
Gap between axle sleeve and the little axle is reduced, and maximum 0.094mm in the radius finishes between axle sleeve and little axle and leaves in diameter range within the 1mm gap, can not consider.And to gap between the parts such as axle sleeve and chain link, at diameter range internal clearance reduction δ: between chain link axle sleeve outer radius and the chain link 0.070mm * 2, i.e. 0.140mm; Between grate plate axle sleeve outer radius and the grate plate 0.128mm; Side plate axle sleeve outer radius and between be 0.018mm.
Calculate according to formula (2), obtain:
Have 6.3mm expansion slit on the chain links support pipe spreader, have about 5.2mm expansion slit on the grate plate axle sleeve, have about 2.0mm expansion slit on the side plate axle sleeve.
As Fig. 1, on little axle 5, be provided with grate plate 2 bolster sleeve pipes 12 and supporting sleeve short tube 11 vertically successively, the bolster sleeve pipe 10 of chain link 3, the bolster sleeve pipe 9 of side plate 4 is provided with whole comb bed located opening pin 8 on little axle 5 at the two ends of little axle 5.
The utility model compared with prior art advantage is: chain grate machine operating chain-shaft is to determine can with radial clearance Lean on, radial clearance drops to 1.0mm from original 1.5mm, and structure is compacter, prevent chain rotation browsing chain link, Grate " is ridden donkey " phenomenon and grate are leaked the problems such as material or sideslip, have improved the drying grate operational reliability.
Claims (2)
1. a chain grate machine operating chain-shaft is a motion parts floating support device, it is characterized in that: on little axle (5), be provided with grate plate bolster sleeve pipe (12) and supporting sleeve short tube (11) vertically successively, the bolster sleeve pipe (10) of chain link, the bolster sleeve pipe (9) of side plate is provided with the whole service chain at the last located opening pin (8) of little axle (5) at the two ends of little axle (5).
2. be motion parts floating support device according to the said a kind of chain grate machine operating chain-shaft of claim 1, it is characterized in that: grate plate supporting grate plate pipe spreader (12) and supporting sleeve short tube (11) have the expansion slit, width 5.2mm; Chain links support pipe spreader (10) has the expansion slit, width 6.3mm; Have the expansion slit on the side plate bolster sleeve pipe (9), width 2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202165780U CN201311190Y (en) | 2008-11-04 | 2008-11-04 | Operation chain shaft system motion element floating support device of chain grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202165780U CN201311190Y (en) | 2008-11-04 | 2008-11-04 | Operation chain shaft system motion element floating support device of chain grate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201311190Y true CN201311190Y (en) | 2009-09-16 |
Family
ID=41108445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202165780U Expired - Fee Related CN201311190Y (en) | 2008-11-04 | 2008-11-04 | Operation chain shaft system motion element floating support device of chain grate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201311190Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926211A (en) * | 2019-12-11 | 2020-03-27 | 四川德胜集团钒钛有限公司 | Chain grate capable of adjusting axial clearance |
| TWI710231B (en) * | 2020-02-27 | 2020-11-11 | 中華電信股份有限公司 | Path quality report method crossed over multiple centralized control plane |
-
2008
- 2008-11-04 CN CNU2008202165780U patent/CN201311190Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926211A (en) * | 2019-12-11 | 2020-03-27 | 四川德胜集团钒钛有限公司 | Chain grate capable of adjusting axial clearance |
| CN110926211B (en) * | 2019-12-11 | 2021-09-07 | 四川德胜集团钒钛有限公司 | Chain grate capable of adjusting axial clearance |
| TWI710231B (en) * | 2020-02-27 | 2020-11-11 | 中華電信股份有限公司 | Path quality report method crossed over multiple centralized control plane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20161104 |