CN102840310B - Twin-screw extruder gear case - Google Patents
Twin-screw extruder gear case Download PDFInfo
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- CN102840310B CN102840310B CN201210307265.7A CN201210307265A CN102840310B CN 102840310 B CN102840310 B CN 102840310B CN 201210307265 A CN201210307265 A CN 201210307265A CN 102840310 B CN102840310 B CN 102840310B
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- output shaft
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- ring
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Abstract
The invention discloses a twin-screw extruder gear case. The twin-screw extruder gear case prolongs service life of a tandem thrust bearing and prevents a short output shaft from axial float. A tandem thrust bearing preloading device is arranged on the other end of the short output gear shaft provided with the tandem thrust bearing, and comprises a spring clamping ring, a fixed screw of the spring clamping ring, compression springs, a revising ring, a plane thrust bearing transmitting preloading force and inner rings of double-line cylindrical roller bearings. The preloading force of the tandem thrust bearing preloading device is generated by a plurality of the springs fixed on a small hole of a case body by the spring clamping ring being compressed. Spring force is transmitted from the revising ring, the plane thrust bearing, the inner ring of a supporting bearing (12), a left step and a right step of the short output shaft, the tandem thrust bearing to a finishing gasket and finally acts on the gear case body on the left end, while the spring force is transmitted from the spring clamping ring to the screw on the spring clamping ring, and finally acts on the gear case body on the right end.
Description
Technical field
The present invention relates to a kind of gear-box of double screw extruder, specifically a kind of Double-screw extruder reduction gear box with pre-tightening apparatus, by axial pretightening device, the device ensures the stable use of tandem thrust-bearing, improve the reliability of gear-box.
Background technique
Double-screw extruder reduction gear box mainly realizes slowing down and power division two kinds of functions, and motor speed is not only reduced to rotating speed needed for extruder screw by it, and is assigned on two output shafts by the power averaging of input shaft.
Double screw extruder rotates to advance material by swivel nut in barrel, and swivel nut is arranged on long bolt by inside and outside spline, and long bolt is rigidly connected by spline housing and gear-box two output shafts.Swivel nut bears larger deboost (axis) when advancing material.Therefore, gearbox output shaft not only bears the radial load produced because of transmitting torque, and bears the powerful thrust load produced because advancing material.
Because extruder two screw rods centre distance limits the mounting point of bearing, general, the bearing bearing end thrust of long output shaft is placed on the rear end of axle, and the bearing (tandem thrust-bearing) bearing end thrust of short output shaft is because limit spatial position, can only be arranged on neutral position.Tandem thrust-bearing causes decline its working life because not having pretension, short output shaft axial float phenomenon usually appears in Double-screw extruder reduction gear box simultaneously.
Summary of the invention
The present invention is directed to problems of the prior art with not enough, provide a kind of Double-screw extruder reduction gear box with tandem thrust bearing pre-loading device, in its structure to prolong tandem thrust-bearing life-span, prevent reduction gear box to occur short output shaft axially simultaneously
alterdynamic phenomenon.
A kind of gear box of double-screw extruder of the present invention, comprise gear housing, long output shaft, short output shaft, driving gearshaft, described long output shaft and short output shaft are installed in parallel in gear housing, long output shaft passes to driving gearshaft by one group of gear moment of torsion, driving gearshaft passes to short output shaft by another group gear moment of torsion again, the both sides of short output shaft are bearing on spring bearing respectively, tandem thrust-bearing short output shaft is also equipped with for bearing whole end thrusts, it is characterized in that, the pre-tightening apparatus of tandem thrust-bearing is housed in one end of short output shaft outputting power.
Further, described pre-tightening apparatus comprises the plain thrust bearing of spring pressuring ring and set screw, Compress Spring, correction circle and transmission pretightening force; On described gear housing, some through apertures are circumferentially evenly provided with centered by short output shaft axis hole, Compress Spring is placed in aperture, to be arranged on gear housing outside short output shaft axis hole by set screw for the spring pressuring ring of axially locating Compress Spring, correction circle for revising amount of spring compression is arranged on inside output shaft axis hole, and Compress Spring is compressed in spring pressuring ring and revises between circle; Plain thrust bearing and spring bearing are arranged on successively to be revised after circle.
Described plain thrust bearing to be fixed on short output shaft towards the race ring of tandem thrust-bearing side and to rotate with short output shaft with spring bearing inner ring, and plain thrust bearing is fixed on the bearing mounting hole of gear housing towards the race ring of Compress Spring side and (does not rotate).
As improvement, described spring bearing is preferably Biserial cylindrical roller bearing.During work, Biserial cylindrical roller bearing both bore radial load, and its inner ring bears again the pretightening force transmitting tandem thrust-bearing.
The described gap size revised between circle and gear housing inwall is preferably 0.5-1mm.
As further improvement, be provided with finishing packing ring in one end of the tandem thrust-bearing away from tandem thrust bearing pre-loading device.
The right external part of long output shaft and short output shaft should flush, and is adjusted, the right external part of long output shaft and short output shaft should be flushed by the thickness size of match grinding finishing packing ring.After finishing gasket thickness size is determined, the gap size revised between circle and casing has just been decided, now reconditioning correction circle, the gap size revised between circle and casing is made to be fixed value (0.5-1mm), that is, the pre compressed magnitude of Compress Spring controls at certain numerical value, and the pretightening force of tandem thrust-bearing namely maintains a fixing numerical value.
The present invention is by several Compress Springs uniform on casing, all the time spring-force driven dual at two ends, left end, by revising the left and right step → tandem thrust-bearing → finishing packing ring of circle → plain thrust bearing → spring bearing (inner ring) → short output shaft, is finally applied to gear housing
on; Right-hand member, by the screw on spring pressuring ring → spring pressuring ring, is finally applied to gear housing
on.Tandem thrust-bearing on short output shaft has spring-force driven dual thereon all the time.Tandem thrust-bearing because of structural feature need assemble time answer preload (theoretical value is the basic dynamic load rating of 1% bearing), to ensure that it has good radial centering state all the time.The present invention makes tandem thrust-bearing all the time by preloading effect, extends the tandem thrust-bearing life-span, and solves the short output shaft axial float phenomenon that Double-screw extruder reduction gear box often has.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention,
Fig. 2 be the A-A of Fig. 1 to sectional view,
Fig. 3 be in Fig. 1 B to partial enlarged drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further.
As shown in Figure 1 to Figure 3, the assembly that the embodiment of the present invention comprises is: long output shaft 1, gear housing 2, short output shaft 3, driving gearshaft 4, tandem thrust-bearing 5, finishing packing ring 6, spring pressuring ring 7, set screw 8, Compress Spring 9, correction circle 10, plain thrust bearing 11, spring bearing 12.
Long output shaft 1 passes to driving gearshaft 4 by a pair gear (at long output shaft 1 left end) moment of torsion, driving gearshaft 4 passes to short output shaft 3 by the gear on axle moment of torsion, and the velocity ratio of these two pairs of gears is reciprocal each other, long like this output shaft 1, short output shaft 3 be in the same way, synchronized rotation.
Short output shaft 3 two ends all adopt spring bearing to support, wherein in the bearing supporting front end by near caudal end part, tandem thrust-bearing 5 is also housed, the spring bearing that Power output side (i.e. front end) is provided with is Biserial cylindrical roller bearing 12, is provided with tandem thrust bearing pre-loading device before Biserial cylindrical roller bearing 12; This tandem thrust bearing pre-loading device comprises spring pressuring ring 7, set screw 8, Compress Spring 9, revises circle 10 and plain thrust bearing 11.
Described spring pressuring ring 7 is arranged on gear housing 2 by set screw 8; Described Compress Spring 9 is placed in aperture through on casing, and aperture is uniformly distributed around short output shaft center, and Compress Spring 9 is compressed in spring pressuring ring 7 and revises between circle 10.Described correction circle 10 tightly withstands on the retainer ring on the right of plain thrust bearing 11 by spring force, by the thickness of reconditioning correction circle 10 during gear-box assembling, ensure that the gap size revised between circle 10 and casing is fixed value (0.5-1mm), that is, the pre compressed magnitude of Compress Spring 9 controls at certain numerical value, and the pretightening force of tandem thrust-bearing 5 namely maintains a fixing numerical value.To be fixed on inside the circle on described plain thrust bearing 11 left side on short output shaft 3 and to rotate together with short output shaft 3 with Biserial cylindrical roller bearing 12 inner ring, being fixed on outside the circle on the right of plain thrust bearing 11 on gear housing bearing mounting hole and (not rotating); Described Biserial cylindrical roller bearing 12 both bore radial load, and its inner ring bears again the function of the pretightening force transmitting tandem thrust-bearing!
The right external part of long output shaft 1 and short output shaft 3 should flush, and the thickness size can repairing packing ring 6 by match grinding adjusts.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (4)
1. a gear box of double-screw extruder, comprise gear housing (2), long output shaft (1), short output shaft (3), driving gearshaft (4), described long output shaft (1) and short output shaft (3) are installed in parallel in gear housing (2), long output shaft (1) passes to driving gearshaft (4) by one group of gear moment of torsion, driving gearshaft (4) passes to short output shaft (3) by another group gear moment of torsion again, the both sides of short output shaft (3) are bearing on spring bearing respectively, tandem thrust-bearing (5) short output shaft (3) is also equipped with for bearing whole end thrusts, it is characterized in that, the pre-tightening apparatus of tandem thrust-bearing is housed in one end of short output shaft (3) outputting power,
Described pre-tightening apparatus comprises spring pressuring ring (7) and set screw (8), Compress Spring (9), revises the plain thrust bearing (11) enclosing (10) and transmit pretightening force; On described gear housing (2), some through apertures are circumferentially evenly provided with centered by short output shaft axis hole, Compress Spring (9) is placed in aperture, for axially locating Compress Spring spring pressuring ring (7) by set screw (8) be arranged on gear housing (
2) go up outside short output shaft axis hole, be arranged on inside output shaft axis hole for the correction circle (10) revising amount of spring compression, Compress Spring (9) is compressed in spring pressuring ring (7) and revises between circle (10); Plain thrust bearing (11) and spring bearing (12) are arranged on successively to be revised after circle; It is upper and rotate with short output shaft (3) with spring bearing (12) inner ring that described plain thrust bearing (11) is fixed on short output shaft (3) towards the race ring of tandem thrust-bearing side, and plain thrust bearing (11) is fixed on the bearing mounting hole of gear housing towards the race ring of Compress Spring side.
2. gear box of double-screw extruder according to claim 1, is characterized in that, described spring bearing (12) is Biserial cylindrical roller bearing (12).
3. gear box of double-screw extruder according to claim 1 and 2, is characterized in that, the described gap size revised between circle (10) and gear housing (2) inwall is 0.5-1mm.
4. gear box of double-screw extruder according to claim 1 and 2, is characterized in that, is provided with finishing packing ring in one end of the tandem thrust-bearing (5) away from tandem thrust bearing pre-loading device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210307265.7A CN102840310B (en) | 2012-08-27 | 2012-08-27 | Twin-screw extruder gear case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210307265.7A CN102840310B (en) | 2012-08-27 | 2012-08-27 | Twin-screw extruder gear case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102840310A CN102840310A (en) | 2012-12-26 |
| CN102840310B true CN102840310B (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210307265.7A Active CN102840310B (en) | 2012-08-27 | 2012-08-27 | Twin-screw extruder gear case |
Country Status (1)
| Country | Link |
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| CN (1) | CN102840310B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486231A (en) * | 2013-10-14 | 2014-01-01 | 南京宁嘉机电有限公司 | Gearbox of parallel double-screw extruder |
| CN104373560B (en) * | 2014-10-30 | 2016-08-24 | 南京金格尔齿轮箱有限公司 | A kind of parallel dual-screw extruding machine gear-box |
| CN110053357B (en) * | 2019-05-26 | 2024-04-30 | 上海瑞源印刷设备有限公司 | Anilox roller mounting structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0716914A1 (en) * | 1994-12-14 | 1996-06-19 | A. Friedr. Flender Ag | Drive for a twin-screw extruder |
| DE102004050448A1 (en) * | 2004-10-16 | 2006-04-20 | Thielenhaus Technologies Gmbh | Extruder screw drive unit has a mitre gear transmission unit between motor and screw drive shaft and preloaded thrust bearing to resist axial screw loads |
| CN101832339A (en) * | 2010-04-15 | 2010-09-15 | 胡炜 | Preloading structure of thrust bearing and extruder reducer with same |
| CN102518783A (en) * | 2011-11-30 | 2012-06-27 | 南京金格尔齿轮箱有限公司 | Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device |
| CN202851899U (en) * | 2012-08-27 | 2013-04-03 | 南京金格尔齿轮箱有限公司 | Double-screw extruder gear case |
-
2012
- 2012-08-27 CN CN201210307265.7A patent/CN102840310B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0716914A1 (en) * | 1994-12-14 | 1996-06-19 | A. Friedr. Flender Ag | Drive for a twin-screw extruder |
| DE102004050448A1 (en) * | 2004-10-16 | 2006-04-20 | Thielenhaus Technologies Gmbh | Extruder screw drive unit has a mitre gear transmission unit between motor and screw drive shaft and preloaded thrust bearing to resist axial screw loads |
| CN101832339A (en) * | 2010-04-15 | 2010-09-15 | 胡炜 | Preloading structure of thrust bearing and extruder reducer with same |
| CN102518783A (en) * | 2011-11-30 | 2012-06-27 | 南京金格尔齿轮箱有限公司 | Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device |
| CN202851899U (en) * | 2012-08-27 | 2013-04-03 | 南京金格尔齿轮箱有限公司 | Double-screw extruder gear case |
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| Publication number | Publication date |
|---|---|
| CN102840310A (en) | 2012-12-26 |
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