Double-screw extruder reduction gear box provided with tandem thrust bearing pre-loading device
A twin-screw extruder, reduction gear box technology, applied in belt/chain/gear, transmission parts, mechanical equipment, etc., can solve the problems of reduced service life, short output shaft axial movement, etc., to prolong service life , The effect of preventing axial movement
Active Publication Date: 2014-07-02
南京金格尔齿轮箱有限公司
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Problems solved by technology
The service life of the tandem thrust bearing is reduced due to lack of preload, and the reduction gear box of the twin-screw extruder often has the phenomenon of axial movement of the short output shaft
Method used
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[0013] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.
[0014] Such as figure 1 As shown, the components included in the embodiment of the present invention are: long output shaft 1, gear case 2, short output shaft 3, transmission gear shaft 4, tandem thrust bearing 5, dressing gasket 6, flange sleeve 7, key 8, Support ring 9, thrust bearing 10, correction ring 11, compression spring 12, Huff ring 13, screw 14.
[0015] The long output shaft 1 transmits the torque to the transmission gear shaft 4 through a pair of gears (at the left end of the long output shaft 1), and the transmission gear shaft 4 transmits the torque to the short output shaft 3 through the gears on the shaft, and the transmission of the two pairs of gears The ratio is reciprocal, so that the long output shaft 1 and the short output shaft 3 rotate in the same direction and at the same speed.
[0016] A tandem thrust bearing prelo...
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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 [0001] The invention relates to a preloading device for a tandem thrust bearing in a reduction gear box of a twin-screw extruder, specifically an axial preloading device, which ensures the stable use of the tandem thrust bearing and improves the reliability of the gearbox. Background technique [0002] Twin-screw extruder reduction gearbox mainly realizes two functions of deceleration and power distribution. It not only reduces the motor speed to the required speed of the extruder screw, but also distributes the power of the input shaft to the two output shafts equally. [0003] The twin-screw extruder propels the material through the rotation of the screw sleeve in the screw barrel. The screw sleeve is installed on the long screw through the inner and outer splines, and the long screw is rigidly connected with the two output shafts of the gearbox through the spline sleeve. The screw sleeve bears a large reverse thrust (axial) when pushing the material. The...
Claims
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IPC IPC(8): F16H57/022B29C47/08
Inventor 周永良汤本金王淑娟
Owner 南京金格尔齿轮箱有限公司