CN201520048U

CN201520048U - Double-screw extruder

Info

Publication number: CN201520048U
Application number: CN2009202064464U
Authority: CN
Inventors: 颜尧奎
Original assignee: CHONGQING JIALIANG REINFORCED PLASTIC PRODUCTS Co Ltd
Current assignee: CHONGQING JIALIANG REINFORCED PLASTIC PRODUCTS Co Ltd
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2010-07-07
Anticipated expiration: 2019-09-25

Abstract

The utility model discloses a double-screw extruder. The extruder comprises a driving motor, screws, a long output shaft, a short output shaft, a bearing support, a frame and a machine barrel, wherein a bearing device of the short output shaft comprises a thrust bearing I, a positioning bearing II and a thrust bearing III which are transversely arranged on a bearing support of the short output shaft in sequence; inner rings of the thrust bearing I, the positioning bearing II and the thrust bearing III are supported on the short output shaft, and outer rings thereof are supported on the inner wall of the bearing support of the short output shaft; the thrust bearing I, the positioning bearing II and the thrust bearing III are coaxial with the short output shaft; the thrust bearing Iand the thrust bearing III are respectively arranged at two ends of the bearing support of the short output shaft; and the positioning bearing II is arranged at the middle part of the bearing support of the short output shaft. The improvement of the bearing support system of the short output shaft reduces the radial load on the thrust bearings, simultaneously prolongs the service life of the short output shaft, reduces the repair frequency of a gearbox, and lowers the manufacturing cost.

Description

Double screw extruder

Technical field

The utility model relates to a kind of double screw extruder.

Background technology

In the prior art, the twin-screw plastic extruder holds an important position in Polymer Processing, its application is increasingly extensive, as shown in Figure 1, the rigid bearing 1 of the short output shaft of the gear-box of common twin-screw plastic extruder adopts the tandem plane bearing usually, there is following problem in such set-up mode: because the kick of screw rod, cause and beat greatlyyer when extruding, locate relatively poor; Service time is shorter, generally has only three months; Cause scrapping of short output shaft easily, lose greatlyyer, simultaneously, cause to produce and incur loss through delay because the gear-box maintenance is frequent.

The utility model content

In view of this, the utility model provides a kind of double screw extruder, improves by the bearing set-up mode to short output shaft, has solved the problem that existing equipment exists.

The purpose of this utility model provides a kind of double screw extruder, comprise drive motors, screw rod, long output shaft, short output shaft, bearing block, support and machine barrel, described bearing block comprises length, short output shaft bearing seat, described long output shaft and short output shaft are separately positioned on length by bearing arrangement, the inside of short output shaft bearing seat, described bearing block is arranged on the support, the bearing arrangement of described short output shaft comprises the thrust bearing I of lateral arrangement on short output shaft bearing seat successively, location bearing II and thrust bearing III, described thrust bearing I, the inner ring of location bearing II and thrust bearing III is bearing on the short output shaft, the inwall of the short output shaft bearing seat of outer ring supporting, described thrust bearing I, location bearing II and thrust bearing III are coaxial with short output shaft, wherein, described thrust bearing I and thrust bearing III are arranged on the two ends of short output shaft bearing seat, and described thrust bearing is arranged on the middle part of short output shaft bearing seat.

Further, described thrust bearing I and thrust bearing III are the tapering bearing, and described location bearing II is a needle bearing.

The beneficial effects of the utility model are:

The utility model improves by the bearing support system to short output shaft, has reduced thrust bearing load diametrically, has prolonged the service life of short output shaft simultaneously, has reduced the repairing number of times of gear-box, has reduced production cost.

Other advantages of the present utility model, target, to set forth in the following description to a certain extent with feature, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by following specification and claims.

Description of drawings

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:

Fig. 1 is the short output shaft bearing structural representation of existing double screw extruder;

Fig. 2 is a structural representation of the present utility model.

The specific embodiment

Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only for the utility model is described, rather than in order to limit protection domain of the present utility model.

As shown in Figure 2, double screw extruder of the present utility model, comprise drive motors, screw rod, long output shaft, short output shaft 5, bearing block, support and machine barrel, bearing block comprises length, short output shaft bearing seat, long output shaft and short output shaft 5 are separately positioned on length by bearing arrangement, the inside of short output shaft bearing seat, bearing block is arranged on the support, the bearing arrangement of short output shaft comprises the thrust bearing I 2 of lateral arrangement on short output shaft bearing seat successively, location bearing II 3 and thrust bearing III 4, thrust bearing I 2, the inner ring of location bearing II 3 and thrust bearing III 4 is bearing on the short output shaft, the inwall of the short output shaft bearing seat of outer ring supporting, push away and hold the two ends that I 2 and thrust bearing III 4 are arranged on short output shaft bearing seat, location bearing II 3 is arranged on the middle part of short output shaft bearing seat, thrust bearing I 2 and thrust bearing III 4 are the tapering bearing, location bearing II 3 is a needle bearing, in the present embodiment, thrust bearing I 2 adopts 32909 tapering bearings, thrust bearing III 4 adopts 4909 tapering bearings, and location bearing II 3 adopts 50/35 needle bearing.

Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. double screw extruder, comprise drive motors, screw rod, long output shaft, short output shaft (5), bearing block, support and machine barrel, described bearing block comprises length, short output shaft bearing seat, described long output shaft and short output shaft (5) are separately positioned on length by bearing arrangement, the inside of short output shaft bearing seat, described bearing block is arranged on the support, it is characterized in that: the bearing arrangement of described short output shaft comprises the thrust bearing I (2) of lateral arrangement on short output shaft bearing seat successively, location bearing II (3) and thrust bearing III (4), described thrust bearing I (2), the inner ring of location bearing II (3) and thrust bearing III (4) is bearing on the short output shaft, the inwall of the short output shaft bearing seat of outer ring supporting, described thrust bearing I (2), location bearing II (3) and thrust bearing III (4) are coaxial with short output shaft, wherein, described thrust bearing I (2) and thrust bearing III (4) are arranged on the two ends of short output shaft bearing seat, and described location bearing II (3) is arranged on the middle part of short output shaft bearing seat.

2. double screw extruder as claimed in claim 1 is characterized in that: described thrust bearing I (2) and thrust bearing III (4) are the tapering bearing, and described location bearing II (3) is a needle bearing.