CN103374367A - Vertical braking torque automatically increasing few tooth difference-rack driven coke pushing device - Google Patents
Vertical braking torque automatically increasing few tooth difference-rack driven coke pushing device Download PDFInfo
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- CN103374367A CN103374367A CN2012101316623A CN201210131662A CN103374367A CN 103374367 A CN103374367 A CN 103374367A CN 2012101316623 A CN2012101316623 A CN 2012101316623A CN 201210131662 A CN201210131662 A CN 201210131662A CN 103374367 A CN103374367 A CN 103374367A
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- coke pushing
- bearing
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- coke
- slotted disk
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- 239000000571 coke Substances 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 239000011521 glass Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 abstract description 2
- 230000037250 Clearance Effects 0.000 description 12
- 230000035512 clearance Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 210000001624 Hip Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003638 reducing agent Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000196435 Prunus domestica subsp. insititia Species 0.000 description 1
- 210000002832 Shoulder Anatomy 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003116 impacting Effects 0.000 description 1
- 230000002093 peripheral Effects 0.000 description 1
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Abstract
The invention relates to the technical field of coke pushing devices of coke ovens and provides a vertical braking torque automatically increasing few tooth difference-rack driven coke pushing device. The device comprises a coke pushing support, a supporting roll, a coke pushing rod and a braking torque automatically increasing transmission device, wherein a transmission component comprises a rotor shaft, eccentric bearings, planet gears, inner gear rings and an output mechanism comprising an output shaft, pins and column sleeves. The device is characterized in that a motor, the inner gear rings and a vertical motor base are connected into a whole in order; the output shaft is connected with a spline of a drive gear; a long rack is laterally installed on the inner wall of the coke pushing rod; the rack pushes the coke pushing rod to move forward when the drive gear rotates clockwise, and the coke pushing rod is moved backward when the drive gear rotates counterclockwise; and a round cover is connected on a disk of the output shaft to prevent lubricating oil from leaking from an oil seal. The device has the beneficial effects that the gear-rack meshing accuracy is ensured, thus reducing the impact force and vibration of the coke pushing rod; the weight is reduced by 45-60%, and the price can be reduced by 50-65%; the braking torque automatically increases with the increase of drag torque; and the involute few tooth difference structure is simple and adopts multi-tooth meshing, the bearing capacity is high, and the service life is long.
Description
[technical field]
The present invention relates to the coke pusher technical field, a kind of vertical braking moment is from increasing few teeth difference-rack drives coke pusher.
[background technology]
Coke oven factory of Baogang paper " research of 6m vibration of pushing rod of coke oven " points out: can produce vibration during the reciprocal work done of pushing ram in the coke pusher, its major cause is the distortion that " waist collapses " trend is progressively arranged after pushing ram is heated, and the pushing ram distortion makes gear-tooth bar sideshake and bottom clearance substantial deviation theoretical value (sideshake 3.5-5, bottom clearance 8-12): the anterior tooth bar sideshake 6.8-7.2 of place of actual measurement pushing ram, bottom clearance 14.8; Middle part sideshake 7.5-7.8, bottom clearance 18; Rear portion sideshake 7.6-8, bottom clearance 17.2 (mm of unit).
Vibrating in various degree all appears in the 6m coke oven coke-pusher bar of domestic Baosteel, Wuhan Iron and Steel Plant, Handan Iron and Steel Co, elder brother's steel, mountain Jiao and Baogang etc., produce resonance when serious and cause that bottom brick becomes flexible, cracks, the positive displacement of jamb brick and combustion chamber string leak etc. (6m coke oven principal dimension: the long 15140mm of coking chamber, high 5650mm, average wide 450mm);
Coke pusher comprises pushing ram, coke pushing bearing and transmission mechanism: motor YZR355L110kW, n
1=582rpm, n
2=14.6rpm, pushing ram (comprising coke pushing head, crawler shoe) is bearing in above the support roll, have in the support roll three groups with the side roller to prevent the pushing ram sideslip, pushing ram is a body structure, tooth bar is located at the top of bar, in pushing ram enters stove after, in order to support pushing ram, be provided with crawler shoe, its bottom height is adjustable.Adopt magnetic eddy-current brake WZ355L and hydraulic pressure block brake YWZ-400/90-10 to carry out the speed setting of coke pushing whole process to realize without impacting coke pushing.For pushing ram in the incinerator that prevents from having a power failure suddenly, be provided with hand gear.
Transmission mechanism is the three-stage horizontal type structure of one-level cone tooth+secondary parallel-axes gears: i=2.045 * 3.962 * 4.923=39.9, pushing ram gear Z=15, m=40 drive tooth bar and realize pushing ram advance and retreat, coke pushing speed 27.4m/min, stroke 25774mm.
[summary of the invention]
Gear-tooth bar stable drive, pushing ram did not vibrate and low with price, that efficient is identical single-stage few teeth difference replaces the vertical braking moment of background technology from increasing few teeth difference-rack drives coke pusher when the object of the invention provided a kind of work done.
Technical scheme:
(A) driving gear and output shaft make driving gear have certain amount of floating in order to sideshake and the bottom clearance of compensation with tooth bar with spending strong being slidingly connected, and long rack bar side is loaded on the pushing ram inwall.During according to paper " research of 6m vibration of pushing rod of coke oven " the reciprocal work done of pushing ram, pushing ram " waist collapses " deflection occurs up to 60mm, and its result makes gear-tooth bar sideshake and bottom clearance substantial deviation theoretical value (sideshake 3.5-5mm, bottom clearance 8-12mm): the anterior tooth bar sideshake 6.8-8mm of place of actual measurement pushing ram, bottom clearance 14.8-18mm.After the present invention will long rack bar side be loaded on the pushing ram inwall, the rigidity of its side dress section is far above sleeping dress section, long tooth bar deflection is descended, simultaneously according to Theoretical Calculation: establishing long tooth bar deflection is 30mm, coke pushing stroke 25774mm, then the pitch angle of tooth is 0.0012 ° only, illustrates that the sideshake of gear-tooth bar and bottom clearance still can be in theoretical value, guarantees the accuracy of mesh of gear-tooth bar, thereby gear-tooth bar stable drive greatly reduces the vibration of gear-tooth bar surging force and pushing ram.
(B) replace three grades of decelerations with the deceleration of single-stage involute less tooth difference: " the calculated example of 7-126 page or leaf on the gear handbook: efficiency eta=0.944 (two teeth difference Z
d=2), the contriver is according to 100 examples, tooth difference Z
d=2,3,4, calculation result draws: efficiency eta=0.934,0.96,0.97., thereby can replace background technology " cone tooth+secondary reducer with hardened tooth surface ";
(C) two groups of steel ball V-type slot devices in the brake component are steel ball V-type groove automatic pressurizing device improved (seeing 90 pages of Ruan Zhongtang " mechanical stepless transmission "): first group is comprised of the steel ball between active V-type slotted disk, the driven V-type slotted disk of telophragma one side and two V-type groove faces, and telophragma connects with the cone dish; Second group of steel ball by telophragma opposite side active V-type slotted disk, the second driven V-type slotted disk and two V-type groove faces centre forms.Principle of work: during energising, first group of active V-type groove face produces positive pressure to steel ball, and its axial component promotes the driven V-type slotted disk of telophragma separates friction pair, and braking moment disappears, and its circumferential component drives the output shaft work done that connects with second group of driven V-type slotted disk; During outage, the input shaft stop, moment of resistance makes the second driven V-type groove face produce positive pressure to steel ball, and its axial component compresses friction pair, and braking moment will muchly have much.
According to background technology, its creativeness is embodied in [beneficial effect]:
(1) in the reciprocal work done of pushing ram, guarantees the gear-tooth bar accuracy of mesh, greatly reduce the vibration of surging force and pushing ram;
(2) background technology " cone tooth+secondary reducer with hardened tooth surface " (bearing capacity 72000Nm) is suitable with DCY-500 type reducer with hardened tooth surface (seeing JB/T9002-1999), 113930 yuan of the heavy 4340kg of machine, prices; Weight saving 45-60% of the present invention, price can reduce 50-65%.The Theoretical Calculation data are as follows: Z
b=120, Zc=117, Z
d=3,28.241 ° of engaging angle, e=9.60, b=50mmY
F=3.46Z
-0.137, Y ε=9.2Z
-0.8" mechanical design handbook " volume 3.14-454
σ
w=(Ft/bm) KaKvY
FY ε≤[σ
w]=163 (MPa), peripheral force Ft=2000 (T
2/ n
pd
1)=102564 (N), S
Bb=(σ
Flim/ σ
W) Y
NY
SY
X〉=S
Bbmin=1.0 (σ
Flim=300, [σ
W]=200MPa, Y
N=1.0, Y
S=1.0, Y
X=0.95)
(3) Involute Small Teeth Difference Planetary Gearing advantage: simple in structure, in addition few, the soft flank of tooth technique of part is simple, cost is low;
(4) braking moment increases with moment of resistance and automatically increases, and therefore can replace magnetic eddy-current brake WZ355L with hydraulic pressure block brake YWZ-400/90-10 carries out the speed setting of coke pushing whole process, to realize without the impact coke pushing.
[description of drawings] Fig. 1. embodiment of the invention structural representation
Fig. 2,3 is respectively steel ball and V-type groove outage (braking), Force principle figure when switching on (work done)
[embodiment] encyclopaedizes the present invention below in conjunction with accompanying drawing:
With reference to Fig. 1., 2 and 3. a kind of vertical braking moment from increasing cycloid-rack drives coke pusher, comprise coke pushing bearing 1, support roll 2, pushing ram 3 and braking moment are from increasing transmission mechanism, described pushing ram 3 (comprises the coke pushing head, crawler shoe) is body structure, be bearing on the support roll 2, there are three groups to prevent pushing ram 3 sideslips with the side roller in the support roll 2, support roll 2 is connected in the bottom of coke pushing bearing 1, described braking moment comprises driving member and brake component from increasing transmission mechanism, described driving member comprises input shaft 15 and is contained in capacity eccentric bearing 11 on the input shaft 15, satellite gear 13, ring gear 14 and output mechanism, output mechanism comprises output shaft 6, pin 10 and column sleeve 12, output shaft 6 is bearing in the endoporus of vertical support 8 by two bearings 7, it is characterized in that:
(A) described motor, placket 24, middle cylinder 27, ring gear 14, vertical support 8 and coke pushing bearing 1 are integrally togather in turn, described output shaft 6 shaft extension end outer flower-keys and driving gear 4 internal splines are slidingly connected, make driving gear 8 have certain amount of floating in order to sideshake and bottom clearance between compensation and the long tooth bar 5, driving gear 4 and long tooth bar 5 engagements, described long tooth bar 5 sides are loaded on pushing ram 3 inwalls, when driving gear 8 turns clockwise, long tooth bar 5 promotes pushing ram 3 and moves forward, otherwise, when driving gear 8 turns counterclockwise, it is mobile backward that long tooth bar 5 promotes pushing ram 3, because long tooth bar 5 sides are loaded on pushing ram 3 inwalls and long tooth bar 5 very long (greater than the coke pushing stroke), therefore when " waist collapses " appears in pushing ram 3, the sideshake of gear-tooth bar and bottom clearance still can be in theoretical value, the inboard anchor ring upper joint of described output shaft 6 disks one dome 9 is used for covering bearing 7, and purpose is to prevent that lubricating oil from entering bearing 7 and spilling from oil sealing;
(B) described brake component comprises that device is at two group V-type slotted disk mechanism, friction pair and the return springs of placket 24 with middle cylinder 27 connecting parts inner chambers, wherein:
Described friction pair comprises inner cone 25 and cone dish 26, and wherein inner cone 25 is connected in placket 24 endoporus, and cone dish 26 connects with telophragma 20, and the axial theoretical value that friction pair separates is x;
In described two groups of V-type slotted disk mechanisms, first group of active V-type slotted disk 22 is connected on the rotor axis of electric 23, telophragma 20 1 sides are the first driven V-type slotted disk, between the master and slave two V-type grooves steel ball 21 is arranged, the second driven V-type slotted disk 18 is slidingly connected with the male spline shaft extension end of input shaft 15, telophragma 20 opposite sides are second group initiatively has steel ball 19 between V-type slotted disk, the two V-type grooves, and uniform steel ball number equates with V-type groove number;
Described return spring 17 1 ends are close to the 16 interior ends of glass type spring support, the other end is close to the second driven V-type slotted disk 18 end faces, return spring 17 compresses cone dish 26 and inner cone 25 friction pairs, the outer face of described cup type spring support 16 is near input shaft 15 shaft shoulders and opening end equals the axial theoretical value x that friction pair separates with gap between the second driven V-type slotted disk 18, and described input shaft 15 usefulness bearings are bearing in middle cylinder 27 endoporus.
Braking principle: during energising, connect with rotor axis of electric 23 first group initiatively the V-type groove face of V-type slotted disk 22 steel ball 21 is produced positive pressures: the driven V-type slotted disk that axial component promotes telophragma 20 makes friction pair separate (axial distance x), the braking moment disappearance; Circumferentially the component driving is rotated works done with the input shaft 15 of the second driven V-type slotted disk 18 splined.Obvious first group of steel ball V-type slot device function is clutch coupling, and second group of steel ball V-type slot device function is shaft coupling; When outage, rotor axis of electric 23 stops, moment of resistance makes the V-type groove face of the second driven V-type slotted disk 18 produce positive pressure to steel ball 19, and its axial component compresses friction pair, thereby braking moment will muchly have much.
Claims (1)
1. a vertical braking moment is from increasing few teeth difference-rack drives coke pusher, comprise coke pushing bearing (1), support roll (2), pushing ram (3) and braking moment are from increasing transmission mechanism, described pushing ram (3) (comprises the coke pushing head, crawler shoe) is body structure, be bearing on the support roll (2), have in the support roll (2) three groups with the side roller to prevent pushing ram (3) sideslip, support roll (2) is connected in the bottom of coke pushing bearing (1), described braking moment comprises driving member and brake component from increasing transmission mechanism, described driving member comprises input shaft (15) and is contained in capacity eccentric bearing (11) on the input shaft (15), satellite gear (13), ring gear (14) and output mechanism, output mechanism comprises output shaft (6), pin (10) and column sleeve (12), described output shaft (6) is bearing in the endoporus of vertical support (8) by two bearings (7), it is characterized in that:
(A) described motor, placket (24), middle cylinder (27), ring gear (14), vertical support (8) and coke pushing bearing (1) are integrally togather in turn, described output shaft (6) shaft extension end outer flower-key and driving gear (4) internal spline are slidingly connected, driving gear (4) and long tooth bar (5) engagement, described long tooth bar (5) side is loaded on pushing ram (3) inwall, and inboard anchor ring upper joint one dome of described output shaft (6) disk (9) is used for covering bearing (7);
(B) described brake component comprises that device is at two group V-type slotted disk mechanism, friction pair and the return springs of placket (24) with middle cylinder (27) connecting parts inner chamber, wherein:
Described friction pair comprises inner cone (25) and cone dish (26), and wherein inner cone (25) is connected in placket (24) endoporus, and cone dish (26) connects with telophragma (20), and the axial theoretical value that friction pair separates is x;
In described two groups of V-type slotted disk mechanisms, first group of active V-type slotted disk (22) is connected on the rotor axis of electric (23), telophragma (20) one sides are the first driven V-type slotted disk, between the master and slave two V-type grooves steel ball (21) is arranged, the second driven V-type slotted disk (18) is slidingly connected with the male spline shaft extension end of input shaft (15), telophragma (20) opposite side is second group initiatively has steel ball (19) between V-type slotted disk, the two V-type grooves, and uniform steel ball number equates with V-type groove number;
Described return spring (17) one ends are close to a glass interior end of type spring support (16), the other end is close to the second driven V-type slotted disk (18) end face, return spring (17) compresses cone dish (26) and inner cone (25) friction pair, the outer face of described cup type spring support (16) is near input shaft (15) shaft shoulder and opening end equals the axial theoretical value x that friction pair separates with gap between the second driven V-type slotted disk (18), and described input shaft (15) is bearing in middle (27) endoporus with bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210131662.3A CN103374367B (en) | 2012-04-25 | 2012-04-25 | Vertical braking moment is from increasing few teeth difference-rack drives coke pusher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210131662.3A CN103374367B (en) | 2012-04-25 | 2012-04-25 | Vertical braking moment is from increasing few teeth difference-rack drives coke pusher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103374367A true CN103374367A (en) | 2013-10-30 |
| CN103374367B CN103374367B (en) | 2015-09-02 |
Family
ID=49460214
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210131662.3A Expired - Fee Related CN103374367B (en) | 2012-04-25 | 2012-04-25 | Vertical braking moment is from increasing few teeth difference-rack drives coke pusher |
Country Status (1)
| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250631A (en) * | 2010-05-18 | 2011-11-23 | 上海梅山钢铁股份有限公司 | Sliding shoe of pushing ram |
| CN102313000A (en) * | 2011-03-01 | 2012-01-11 | 吴小杰 | Braking three-plate planetary speed reducer with small teeth difference |
-
2012
- 2012-04-25 CN CN201210131662.3A patent/CN103374367B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250631A (en) * | 2010-05-18 | 2011-11-23 | 上海梅山钢铁股份有限公司 | Sliding shoe of pushing ram |
| CN102313000A (en) * | 2011-03-01 | 2012-01-11 | 吴小杰 | Braking three-plate planetary speed reducer with small teeth difference |
Non-Patent Citations (1)
| Title |
|---|
| 张吉国: "6米推焦机推焦传动振动成因分析", 《重工与起重技术》, no. 1, 31 December 2006 (2006-12-31) * |
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| CN103374367B (en) | 2015-09-02 |
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Owner name: CHEN WEI Free format text: FORMER OWNER: WU XIAOJIE Effective date: 20150629 |
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