CN101424315A - Main gearbox transmission gear for large-sized double-screw pelletizer - Google Patents
Main gearbox transmission gear for large-sized double-screw pelletizer Download PDFInfo
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- CN101424315A CN101424315A CNA2008102286934A CN200810228693A CN101424315A CN 101424315 A CN101424315 A CN 101424315A CN A2008102286934 A CNA2008102286934 A CN A2008102286934A CN 200810228693 A CN200810228693 A CN 200810228693A CN 101424315 A CN101424315 A CN 101424315A
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Abstract
The invention relates to a transmission device for double-screw granulators, in particular to main speed reducer transmission device for large-sized double-screw granulators. A first-order transmission gear meshes with a second-order transmission gear; a passive gear in the second-order transmission gear drives a long output shaft coaxially connected with the passive gear; a third-order driving shaft gear coaxial with the long output shaft meshes with two third-order driven gears; the third-order driven gears are coaxially connected with fourth-order driving gears; two fourth-order driving gears simultaneously mesh a gear on a short output shaft; the centers of the short output shaft and the two fourth-order driving gears are on the same line; the gear on the short output shaft is null in the resultant force of borne radial force and in the resultant force of tangential force; and a bearing on the short output shaft is null in borne resultant force. The transmission device greatly reduces the stress of the gear and the bearing, can still meet strength requirement under the circumstance that two screws are short in distance between centers, guarantees life span, simplifies structure, and reduces design difficulty and manufacturing cost at the same time.
Description
One, technical field
The present invention relates to dual-screw pelletizer, particularly the transmission device of its main reducing gear.
Two, background technique
Large-scale parallel dual-screw mixing extrusion pelleting machine set is the visual plant in petrochemical industry field, and main reducing gear then is one of core component in this unit.Its power is big, and axial force and output torque are big, and structure limits by screw rod centre distance, the load aggravation that the bearing installed in the confined space and gear are born, and design and manufacture difficulty strengthen.
The main reducing gear of the at present big granulation unit pair engagement driving that adopt more.Both drove two gears simultaneously or two gears drive a gear simultaneously by a gear.When the total torque that transmits is a definite value, then each is to moment of torsion of engaging gear transmission, be half of single engaging gear transmitting torque, thereby simultaneously with that gears of two gear engagement on the suffered peripheral force of the every pair of tooth that participates in engagement simultaneously can reduce half, but radial force partial offset or all offset.The stressed of gear, bearing significantly reduced, under the less situation of two screw rods centre distance, still can satisfy requirement of strength, guarantee working life.
At present conventional construction has two kinds: structure one as shown in Figure 1, the radial force partial offset: the input speed of retarder is from left to right exported 1/2 power by the long output shaft on the left side successively after two-stage (centre distance A1, A2) is slowed down; Other 1/2 power slows down via two third level (centre distance A3) shuntings, again by two fourth stages (centre distance A4) with the speed ratio speedup identical with third level speed ratio after, export by the short output shaft on the right.Whole train of gearings is 10 gears altogether.The tangential force that gear on the short output shaft is suffered make a concerted effort and radial force be not zero with withing joint efforts, then the bearing of lacking on the output shaft is subjected to radial force.
Structure two as shown in Figure 2, radial force is all offset: the radial force that the gear on the short output shaft is subjected to make a concerted effort and tangential force to make a concerted effort be zero, it is zero that bearing on the short output shaft is subjected to radial force, but it needs the two-stage speed governing, than more than one two gears of structure, complex structure, production and processing cost height uses energy consumption big.
Three, summary of the invention
The object of the invention is to overcome above-mentioned not enough problem, and a kind of main gearbox transmission gear for large-sized double-screw pelletizer is provided, and special drive mechanism reduces design difficulty and manufacture cost.
The technical solution adopted in the present invention: main gearbox transmission gear for large-sized double-screw pelletizer; one-level driving gear engagement secondary driving gear; driven gear in the secondary driving gear drives and its coaxial long output shaft that connects; three grade driving shaft gear engagement two three grade driven gears coaxial with the driven gear in long output shaft and the secondary driving gear; the three grades of coaxial connection level Four of driven gear driving gears; two level Four driving gears mesh the gear of lacking on the output shaft; short output shaft center and two level Four driving gear center sight alignments, the radial force that the gear on the short output shaft is suffered make a concerted effort and tangential force to make a concerted effort be zero.
The present invention compares with existing like product, has outstanding feature, overcome the technical barrier that related domain never overcomes, to lack output shaft and long output shaft Combinatorial Optimization design cleverly, and will lack the suffered radial force of gear on the output shaft make a concerted effort and tangential force make a concerted effort be designed to zero, the suffered radial force of bearing on the short output shaft is equalled zero, the stressed of gear, bearing significantly reduced, under the less situation of two screw rods centre distance, still can satisfy requirement of strength, guarantee working life, the while is simplified structure again, reduces design difficulty and manufacture cost.
Four, description of drawings:
Fig. 1 is conventional construction one a transmission schematic representation.
Fig. 2 is conventional construction two transmission schematic representation.
Fig. 3 is a structure transmission schematic representation of the present invention.
Fig. 4 is theory of engagement figure of the present invention.
Five, embodiment
As Fig. 3; main gearbox transmission gear for large-sized double-screw pelletizer shown in 4; driving gear 3 in the one-level driving gear 1 engagement secondary driving gear; driven gear 2 in the secondary driving gear drives and its coaxial long output shaft 4 that connects; with two the three grades of driven gears 6 of driven gear 2 coaxial three grades of driving shaft gears that connect, 5 engagements in long output shaft and the secondary driving gear; three grades of driven gear 6 coaxial connection level Four driving gears 7; two level Four driving gears mesh the gear 8 of lacking on the output shaft 9; short output shaft center and two level Four driving gear center sight alignments; the radial force that gear 8 on the short output shaft is suffered make a concerted effort and tangential force to make a concerted effort be zero, suffered the making a concerted effort of bearing on the short output shaft 9 is zero.
Claims (2)
1; main gearbox transmission gear for large-sized double-screw pelletizer; one-level driving gear engagement secondary driving gear; driven shaft gear in the secondary driving gear drives and its coaxial long output shaft that connects; it is characterized in that: with coaxial three grades of driving shaft gears (5) engagement, two the three grades driven gears (6) that connect of the driven gear (2) in long output shaft (4) and the secondary driving gear; the three grades of coaxial connection level Four of driven gear driving gears (7); two level Four driving gears mesh the gear (8) of lacking on the output shaft, short output shaft (9) center and two level Four driving gears (7) center sight alignment.
2, main gearbox transmission gear for large-sized double-screw pelletizer according to claim 1 is characterized in that: the radial force that the gear (8) on the short output shaft is suffered make a concerted effort and tangential force to make a concerted effort be zero, suffered the making a concerted effort of bearing on the short output shaft (9) is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102286934A CN101424315A (en) | 2008-11-10 | 2008-11-10 | Main gearbox transmission gear for large-sized double-screw pelletizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102286934A CN101424315A (en) | 2008-11-10 | 2008-11-10 | Main gearbox transmission gear for large-sized double-screw pelletizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101424315A true CN101424315A (en) | 2009-05-06 |
Family
ID=40615122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102286934A Pending CN101424315A (en) | 2008-11-10 | 2008-11-10 | Main gearbox transmission gear for large-sized double-screw pelletizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101424315A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588514A (en) * | 2012-03-15 | 2012-07-18 | 大连交通大学 | Four-level gear reducer with two shafts concentric |
| CN109854722A (en) * | 2019-03-01 | 2019-06-07 | 郑州机械研究所有限公司 | A kind of twin-screw extrusion owner sliding tooth roller box |
-
2008
- 2008-11-10 CN CNA2008102286934A patent/CN101424315A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588514A (en) * | 2012-03-15 | 2012-07-18 | 大连交通大学 | Four-level gear reducer with two shafts concentric |
| CN102588514B (en) * | 2012-03-15 | 2014-05-07 | 大连交通大学 | Four-level gear reducer with two shafts concentric |
| CN109854722A (en) * | 2019-03-01 | 2019-06-07 | 郑州机械研究所有限公司 | A kind of twin-screw extrusion owner sliding tooth roller box |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090506 |