CN102518783A - Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device - Google Patents
Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device Download PDFInfo
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- CN102518783A CN102518783A CN2011103923221A CN201110392322A CN102518783A CN 102518783 A CN102518783 A CN 102518783A CN 2011103923221 A CN2011103923221 A CN 2011103923221A CN 201110392322 A CN201110392322 A CN 201110392322A CN 102518783 A CN102518783 A CN 102518783A
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- output shaft
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Abstract
The invention discloses a double-screw extruder reduction gear box provided with a tandem thrust bearing pre-loading device. The tandem thrust bearing pre-loading device is arranged at one end of a short output shaft close to the tandem thrust bearing pre-loading device; the tandem thrust bearing pre-loading device comprises a flange sleeve, a key, a support ring, a correction ring, compression springs and a Haff ring; by virtue of eight compression springs which are uniformly distributed on the flange sleeve, the left end finally acts onto a gear box body by virtue of the flange sleeve, the Haff ring, the step of the short output shaft, the tandem thrust bearing and a finishing washer sequentially; and the right end finally acts onto the gear box body by virtue of the correction ring, a thrust bearing and the support ring. The tandem thrust bearing preloads during assembling according to structural characteristic requirement, thus the tandem thrust bearing is always preloaded and the common phenomenon of axial endplay of the short output shaft of the double-screw extruder reduction gear box is avoided.
Description
Technical field
The present invention relates to the pre-tightening apparatus of the tandem thrust-bearing in a kind of double screw extruder reduction gear box, specifically, is a kind of axial pretightening device, and this device has been guaranteed the stable use of tandem thrust-bearing, has improved the reliability of gear-box.
Background technique
The double screw extruder reduction gear box is mainly realized slowing down and two kinds of functions of power division, and it not only is reduced to the required rotating speed of extruder screw with motor speed, and the power averaging of input shaft is assigned on two output shafts.
Double screw extruder rotates in barrel through swivel nut and advances material, and swivel nut is installed on the long bolt through inside and outside spline, and long bolt is rigidly connected through spline housing and two output shafts of gear-box.Swivel nut bears bigger deboost (axially) when advancing material.Therefore, gearbox output shaft not only bears the radial load that produces because of transmitting torque, and bears the powerful thrust load because of advancing material to produce.
Because the mounting point that extruder two screw rods centre distance has limited bearing; General; The bearing of the bearing axial pushing force of long output shaft is placed on the rear end of axle, and the bearing (tandem thrust-bearing) of the bearing axial pushing force of short output shaft can only be installed in the neutral position because of limitting the spatial position.The tandem thrust-bearing does not cause descend its working life because of there being pretension, and short output shaft axial float phenomenon usually appears in the double screw extruder reduction gear box simultaneously.
Summary of the invention
Goal of the invention: to the problems and shortcomings that exist in the existing technology, the present invention provides a kind of and prolongs the tandem thrust-bearing life-span, prevents the double screw extruder reduction gear box that has tandem thrust-bearing pre-tightening apparatus of the short output shaft axial float of double screw extruder reduction gear box.
Technological scheme: a kind of double screw extruder reduction gear box that has tandem thrust-bearing pre-tightening apparatus comprises long output shaft, gear housing, short output shaft, driving gearshaft and tandem thrust-bearing; Said long output shaft passes to driving gearshaft to moment of torsion through a pair of gear (gear is at long output shaft left end); Driving gearshaft passes to short output shaft to moment of torsion through the gear on the axle; And the velocity ratio of these two pairs of gears is reciprocal each other, makes long output shaft and short output shaft in the same way, rotate with speed; End near the short output shaft of tandem thrust-bearing is provided with tandem thrust-bearing pre-tightening apparatus;
Said tandem thrust-bearing pre-tightening apparatus comprises flange cover, key, bracing ring, correction circle, pressure spring and Hough circle; Said flange cover is installed on the end of short output shaft, connects through key itself and short output shaft are rotated synchronously; The short output shaft of said outer end near flange cover is provided with one width annular groove greater than said Hough circle axial thickness; In the annular groove of said Hough snare on short output shaft; Through the thickness of match grinding Hough circle, make the right-hand member of flange cover near the step of short output shaft, and clamp the Hough circle; Said bracing ring makes bracing ring tightly be stuck on the circular groove according to the circular groove width dimensions match grinding thickness size on the gear housing; The retainer ring of said thrust-bearing is installed on the bracing ring; The moving-coil of said thrust-bearing is positioned on the excircle of flange cover, and rotates with flange cover and short output shaft; In the counterbore of said flange cover pressure spring is installed; Said pressure spring one end is located in the counterbore of flange cover, and the other end is provided with revises circle; Said correction snare flange put, an end is connected with the pressure spring end, the other end is close to thrust-bearing; Said pressure spring is given and is revised circle and thrust of thrust-bearing, and thrust is delivered on bracing ring and the gear housing at last;
Tandem thrust-bearing one end away from tandem thrust-bearing pre-tightening apparatus is provided with the finishing packing ring; Long output shaft should flush with the right external part of short output shaft; Thickness size through match grinding finishing packing ring is adjusted, and long output shaft and the right external part of short output shaft should be flushed.
After finishing gasket thickness size is confirmed; The flange cover has just been decided with the gap size of thrust-bearing; Reconditioning correction this moment circle makes that flange cover and the gap size of revising between the circle are fixed value, that is to say; The pre compressed magnitude of pressure spring is controlled at certain numerical value, and the pretightening force of tandem thrust-bearing just maintains a fixed numeric values.
The present invention puts 8 pressure springs that are uniformly distributed with through flange, acts on two ends to spring force all the time, and left end affacts on the gear housing through the step → tandem thrust-bearing → finishing packing ring of flange cover → Hough circle → weak point output shaft at last; Right-hand member affacts on the gear housing through revising circle → thrust-bearing → bracing ring at last.Tandem thrust-bearing on the short output shaft has the spring force effect above that all the time.The tandem thrust-bearing need be answered preload (theoretical value is the basic dynamic load rating of 1% bearing) because of structural feature when assembling, to guarantee it good radial centering state is arranged all the time.The present invention is placed on the neutral position to tandem thrust-bearing pre-tightening apparatus, makes the tandem thrust-bearing receive the preloading effect all the time, and has solved the short output shaft axial float phenomenon that the double screw extruder reduction gear box often has.
Beneficial effect: compared with prior art, the double screw extruder reduction gear box that has tandem thrust-bearing pre-tightening apparatus provided by the present invention has the advantage that prolongs the tandem thrust-bearing life-span, prevents the short output shaft axial float of double screw extruder reduction gear box.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention.
As shown in Figure 1, the assembly that the embodiment of the 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, flange cover 7, key 8, bracing ring 9, thrust-bearing 10, revise circle 11, pressure spring 12, Hough circle 13, screw 14.
End near the short output shaft 3 of tandem thrust-bearing 5 is provided with tandem thrust-bearing pre-tightening apparatus; Tandem thrust-bearing pre-tightening apparatus comprises flange cover 7, key 8, bracing ring 9, revises circle 11, pressure spring 12 and Hough circle 13;
The right external part of long output shaft 1 and short output shaft 3 should flush, and adjusts through the thickness size of match grinding finishing packing ring 6.
After finishing packing ring 6 thickness sizes are confirmed; The gap size A of flange cover 7 and thrust-bearing 10 has just decided; Reconditioning correction this moment circle 11; Make that flange cover 7 and the gap size B that revises between the circle 11 are fixed value, that is to say that the pre compressed magnitude of pressure spring 12 is controlled at certain numerical value, the pretightening force of tandem thrust-bearing 5 just maintains a fixed numeric values.
The above only is a preferred implementation of the present invention, should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement, and these improvement also should be regarded as protection scope of the present invention.
Claims (2)
1. a double screw extruder reduction gear box that has tandem thrust-bearing pre-tightening apparatus comprises long output shaft, gear housing, short output shaft, driving gearshaft and tandem thrust-bearing; It is characterized in that: the end near the short output shaft of tandem thrust-bearing is provided with tandem thrust-bearing pre-tightening apparatus;
Said tandem thrust-bearing pre-tightening apparatus comprises flange cover, key, bracing ring, correction circle, pressure spring and Hough circle; Said flange cover is installed on the end of short output shaft, connects through key itself and short output shaft are rotated synchronously; The short output shaft of said outer end near flange cover is provided with one width annular groove greater than said Hough circle axial thickness; In the annular groove of said Hough snare on short output shaft; Through the thickness of match grinding Hough circle, make the right-hand member of flange cover near the step of short output shaft, and clamp the Hough circle; Said bracing ring makes bracing ring tightly be stuck on the circular groove according to the circular groove width dimensions match grinding thickness size on the gear housing; The retainer ring of said thrust-bearing is installed on the bracing ring; The moving-coil of said thrust-bearing is positioned on the excircle of flange cover, and rotates with flange cover and short output shaft; In the counterbore of said flange cover pressure spring is installed; Said pressure spring one end is located in the counterbore of flange cover, and the other end is provided with revises circle; Said correction snare flange put, an end is connected with the pressure spring end, the other end is close to thrust-bearing; Said pressure spring is given and is revised circle and thrust of thrust-bearing, and thrust is delivered on bracing ring and the gear housing at last;
End away from the tandem thrust-bearing of tandem thrust-bearing pre-tightening apparatus is provided with the finishing packing ring.
2. the double screw extruder reduction gear box that has tandem thrust-bearing pre-tightening apparatus as claimed in claim 1 is characterized in that: through screws clamp Hough circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110392322.1A CN102518783B (en) | 2011-11-30 | 2011-11-30 | Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110392322.1A CN102518783B (en) | 2011-11-30 | 2011-11-30 | Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102518783A true CN102518783A (en) | 2012-06-27 |
| CN102518783B CN102518783B (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110392322.1A Active CN102518783B (en) | 2011-11-30 | 2011-11-30 | Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840310A (en) * | 2012-08-27 | 2012-12-26 | 南京金格尔齿轮箱有限公司 | Twin-screw extruder gear case |
| CN105370848A (en) * | 2015-09-29 | 2016-03-02 | 江苏金源锻造股份有限公司 | Flange shaft inside screw-type extruder transmission case |
| CN108801631A (en) * | 2018-08-03 | 2018-11-13 | 南京金格尔齿轮箱有限公司 | Gear box of double-screw extruder torque and axial thrust integrated loading device |
| CN110757760A (en) * | 2019-10-17 | 2020-02-07 | 丰县友发塑料制品有限公司 | Transmission device of PU pipe extruder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1037736B1 (en) * | 1997-12-08 | 2005-02-02 | Funk, Michael | Gear mechanism for a co-rotating double screw extruder |
| EP1574316A1 (en) * | 2004-03-12 | 2005-09-14 | A. Friedr. Flender Ag | Drive for a twin-screw extruder |
| CN101694236A (en) * | 2008-12-19 | 2010-04-14 | 成都中孚高分子工程有限公司 | High rotation speed gear box for anisotropic parallel twin-screw extruding machine |
| CN201520048U (en) * | 2009-09-25 | 2010-07-07 | 重庆嘉良塑胶制品有限责任公司 | Double-screw extruder |
| CN202418506U (en) * | 2011-11-30 | 2012-09-05 | 南京金格尔齿轮箱有限公司 | Reduction gear box of double-screw extruder with tandem thrust bearing pre-tightening device |
-
2011
- 2011-11-30 CN CN201110392322.1A patent/CN102518783B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1037736B1 (en) * | 1997-12-08 | 2005-02-02 | Funk, Michael | Gear mechanism for a co-rotating double screw extruder |
| EP1574316A1 (en) * | 2004-03-12 | 2005-09-14 | A. Friedr. Flender Ag | Drive for a twin-screw extruder |
| CN101694236A (en) * | 2008-12-19 | 2010-04-14 | 成都中孚高分子工程有限公司 | High rotation speed gear box for anisotropic parallel twin-screw extruding machine |
| CN201520048U (en) * | 2009-09-25 | 2010-07-07 | 重庆嘉良塑胶制品有限责任公司 | Double-screw extruder |
| CN202418506U (en) * | 2011-11-30 | 2012-09-05 | 南京金格尔齿轮箱有限公司 | Reduction gear box of double-screw extruder with tandem thrust bearing pre-tightening device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840310A (en) * | 2012-08-27 | 2012-12-26 | 南京金格尔齿轮箱有限公司 | Twin-screw extruder gear case |
| CN102840310B (en) * | 2012-08-27 | 2015-05-20 | 南京金格尔齿轮箱有限公司 | Twin-screw extruder gear case |
| CN105370848A (en) * | 2015-09-29 | 2016-03-02 | 江苏金源锻造股份有限公司 | Flange shaft inside screw-type extruder transmission case |
| CN108801631A (en) * | 2018-08-03 | 2018-11-13 | 南京金格尔齿轮箱有限公司 | Gear box of double-screw extruder torque and axial thrust integrated loading device |
| CN110757760A (en) * | 2019-10-17 | 2020-02-07 | 丰县友发塑料制品有限公司 | Transmission device of PU pipe extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102518783B (en) | 2014-07-02 |
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