Transmission box for twin-screw extruder

Abstract

The invention discloses a transmission case for a twin-screw extruder. The transmission case comprises a case body, an input shaft arranged in the case body, and a long output shaft I and a long output shaft II, a short output shaft I and a short output shaft II, and a transitional shaft I and a transitional shaft II, which are connected in series in the same direction; a No.1 driving gear on the input shaft is meshed with a No.1 driven gear on the long output shaft II; a No.2 driving gear on the long output shaft I is meshed with a No.2 driven gear on the transitional shaft II; a No.3 driving gear on the transitional shaft I is meshed with a No.3 driven gear on the short output shaft II; a No.4 driving gear on the transitional shaft I is meshed with a No.4 driven gear on the short output shaft I; the No.1 and No.2 driven gears are solid gears of which the tooth width is 120-125mm after widening; the tail end of the long output shaft I penetrates through a bearing in a sleeving manner and is connected with one end of the long output shaft II through a No.1 screw. Compared with the transmission case with the same screw outside diameter, the transmission case has the advantages that the torque rating is higher than 8 and the yield is greatly improved.

Description

technical field [0001] The invention relates to a transmission box, in particular to a transmission box for a twin-screw extruder. Background technique [0002] At present, the transmission systems of co-rotating parallel twin-screw extruders successfully developed at home and abroad mainly include: separation gear transmission system, three-axis transmission system, internal tooth distribution transmission system and multi-gear meshing transmission system. [0003] About the split gear transmission system: mainly through the two gears on one main shaft, the torque is transmitted to the two screw drive shafts respectively. Due to the structure and layout, this form often has a certain speed-up ratio, and the torque of the main shaft is relatively large. [0004] About the three-axis transmission system: this form is currently the most widely used in the transmission system of co-rotating parallel twin-screw extruders at home and abroad. In a three-shaft transmission system...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a transmission box for a twin-screw extruder with reasonable structural design, little increase in production cost, high efficiency, reliability, and strong practicability, which not only reasonably solves technical problems such as torque distribution and gear load sharing, but also Compared with the transmission box with the same screw outer diameter, the torque can be greatly increased, so that the output can also be greatly increased; at the same time, within the controllable range of the weight increase of the transmission box, the output shaft is not easily damaged, and the life of the components is greatly extended. Significantly increase the service life of the whole machine, which has great industrial utilization value

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