CN214774202U

CN214774202U - Extrusion shaft floating support structure of extruder

Info

Publication number: CN214774202U
Application number: CN202120726607.3U
Authority: CN
Inventors: 伍政华; 叶小明
Original assignee: Xiangtan Weida Electrical And Machinery Manufacture Co ltd
Current assignee: Xiangtan Weida Electrical And Machinery Manufacture Co ltd
Priority date: 2021-04-10
Filing date: 2021-04-10
Publication date: 2021-11-19
Anticipated expiration: 2031-04-10

Abstract

The utility model discloses an extruder extrude axle supporting structure that floats, including extruding the axle, extrude the axle and install on the bearing frame, extrude epaxial first double-row roller bearing of installing in the bearing frame, thrust self-aligning roller bearing, the double-row roller bearing of second, it has floating bearing frame to keep away from to extrude bearing frame endotheca of spiral one end, floating bearing frame and extrusion axle sealing connection, floating bearing frame is embedded in the external diameter of the one end of bearing frame and is less than the internal diameter of bearing frame, floating bearing frame passes through the floating bearing frame fixed screw fixed connection of terminal surface on the bearing frame, the double-row roller bearing of second sets up in floating bearing frame, be equipped with a plurality of floating bearing frame adjusting screw that run through the bearing frame and offset with floating bearing frame on the outer wall of bearing frame, leave the clearance between the internal diameter of thrust self-aligning roller bearing's outer lane and bearing frame. The utility model discloses an adjustment bearing frame that floats realizes making the clearance of extruding spiral and overcoat even to extruding the aligning of axle, makes extrusion pressure even.

Description

Extrusion shaft floating support structure of extruder

Technical Field

The utility model relates to an extruder technical field especially relates to an extruder extrude axle supporting structure that floats.

Background

The extrusion shaft of a screw extruder is usually supported by three bearings, a front bearing and a rear bearing support the extrusion shaft, a thrust bearing in the middle bears the extrusion force, and the three bearings are all arranged in a bearing seat. The front end of the extrusion shaft is provided with an extrusion screw, the outer part of the extrusion shaft is provided with an outer sleeve, the mud barrel is static during work, and the extrusion shaft drives the extrusion screw to rotate. A gap is reserved between the extrusion screw and the mud drum, generally between 5 mm and 1mm, and the gap is smaller when the extrusion pressure is higher. Due to the size error and the assembly accumulated error of the parts and the reason that the extrusion shaft droops due to the self weight of the extrusion shaft, the gap between the extrusion screw and the outer sleeve after assembly is uneven, so that the extrusion pressure is uneven on the same section, and the extrusion effect of the extruded product, particularly the extrusion of the thin-wall honeycomb ceramic is greatly influenced.

Disclosure of Invention

In order to solve the problem, the utility model provides a simple structure implements convenient extrusion axle floating support structure, solves and extrudes the inhomogeneous phenomenon in spiral and overcoat clearance, makes extrusion pressure even in the same cross-section.

The utility model adopts the technical proposal that: an extrusion shaft floating support structure of an extruder comprises an extrusion shaft, wherein the extrusion shaft is arranged on a bearing seat, a first double-row roller bearing, a thrust self-aligning roller bearing, a second double-row roller bearing and a floating bearing seat are sequentially arranged on an extrusion shaft in the bearing seat, the floating bearing seat is sleeved in the bearing seat far away from one end of the extrusion screw, the floating bearing seat is connected with the extrusion shaft in a sealing way, the outer diameter of the floating bearing seat embedded in one end of the bearing seat is smaller than the inner diameter of the bearing seat, the floating bearing seat is fixedly connected on the bearing seat through a floating bearing seat fixing screw on the end surface, the second double-row roller bearing is arranged in the floating bearing seat, and a plurality of floating bearing seat adjusting screws which penetrate through the bearing seats and are abutted against the floating bearing seats are arranged on the outer walls of the bearing seats, and a gap is reserved between the outer ring of the self-aligning thrust roller bearing and the inner diameter of the bearing seat.

Furthermore, a plurality of floating bearing seat adjusting screws are uniformly distributed on the circumferential surface of the bearing seat.

Furthermore, the clearance between the outer ring of the self-aligning thrust roller bearing and the inner diameter of the bearing seat is 0.5-1 mm.

Furthermore, a sealing cover is fixedly connected to one end, close to the extrusion screw, of the bearing seat, and the sealing cover is connected with the extrusion shaft in a sealing mode.

Furthermore, a retaining ring is arranged on the inner wall of one side, close to the floating bearing seat, of the bearing seat, the self-aligning thrust roller bearing is attached to the retaining ring and installed on the extrusion shaft, and a shaft sleeve is arranged on the extrusion shaft between the first double-row roller bearing and the self-aligning thrust roller bearing.

Furthermore, an oil cup used for injecting lubricating oil into the bearing seat is arranged on the bearing seat.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an extruder extrude axle supporting structure that floats can extrude the unsteady bearing frame of axle rear end through the adjustment, realize making the clearance of extruding spiral and overcoat even to the aligning of extruding the axle, and it is even to reach extrusion pressure, when extruding axle center adjustment, does not change the state that thrust aligning roller bearing evenly bore and extrude power again. The utility model has the characteristics of simple structure, it is convenient to implement, the effect is obvious.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

As shown in fig. 1, the floating support structure for the extrusion shaft of the extruder according to the present embodiment includes an extrusion shaft 1, the extrusion shaft 1 is mounted on a bearing seat 3, and a first double-row roller bearing 8, a self-aligning thrust roller bearing 10, and a second double-row roller bearing 11 are sequentially mounted on the extrusion shaft 1 in the bearing seat 3. One end, close to the extrusion screw, of the bearing seat is fixedly connected with a sealing cover 2, and the sealing cover 2 is in sealing connection with the extrusion shaft 1. A floating bearing seat 6 is sleeved in the bearing seat 3 far away from one end of the extrusion screw 12, the outer diameter of the floating bearing seat 6 embedded in one end of the bearing seat 3 is smaller than the inner diameter of the bearing seat 3, the floating bearing seat 6 is fixedly connected to the bearing seat 3 through a floating bearing seat fixing screw 7 on the end face, and the second double-row roller bearing 11 is arranged in the floating bearing seat 6. A plurality of floating bearing seat adjusting screws 5 which penetrate through the bearing seat 3 and are abutted against the floating bearing seat 6 are arranged on the outer wall of the bearing seat 3, and the plurality of floating bearing seat adjusting screws 5 are uniformly distributed on the circumferential surface of the bearing seat 3. The inner wall of the bearing seat close to one side of the floating bearing seat is provided with a check ring, the self-aligning thrust roller bearing 10 is attached to the tight check ring and installed on the extrusion shaft 3, and a gap of 0.5-1 mm is reserved between the outer ring of the self-aligning thrust roller bearing 10 and the inner diameter of the bearing seat 3. A sleeve 9 is provided on the extrusion shaft 1 between the first double-row roller bearing 8 and the self-aligning thrust roller bearing 10. And the bearing block is provided with an oil cup 4 for injecting lubricating oil into the bearing block.

The utility model discloses an extrude axle supporting structure that floats bears the axial force jointly by first double row roller bearing 8, the double row roller bearing 11 of second, and thrust self-aligning roller bearing 10 bears the axial and extrudes power, and 9 axial positioning of axle sleeve, bearing pass through oil cup 4 and pour into oil lubrication into, play sealed effect through sealed lid 2 and the 6 upper seal circle of unsteady bearing frame. After installation, when the gap between the extrusion screw 12 and the outer sleeve 13 is not uniform all around (as shown by the dimension S in fig. 1), the floating bearing seat fixing screw 7 can be loosened, the dimension S can be adjusted to be consistent in each direction by adjusting the floating bearing seat adjusting screw 5, and then the floating bearing seat fixing screw 7 is screwed down. When the inner diameter of the outer ring of the self-aligning thrust roller bearing 10 and the bearing seat 3 is installed, a gap (shown as a dimension A in the drawing) of 0.5-1 mm is formed, when the floating bearing seat adjusting screw 5 is adjusted, the self-aligning thrust roller bearing 10 moves in a small range along the installation end face of the bearing seat 3, the inner ring of the self-aligning thrust roller bearing 10 is always fixed with the extrusion shaft 1, radial alignment can be performed in a small range along with the extrusion shaft 1, and the fact that each roller of the self-aligning thrust roller bearing 10 uniformly bears axial force is guaranteed.

Many modifications and other embodiments of the invention will come to mind to one skilled in the art to which this invention pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides an extruding shaft floating support structure of extruder, includes extruding shaft (1), install on bearing frame (3) extruding shaft (1), install first double-row roller bearing (8), thrust self-aligning roller bearing (10), second double-row roller bearing (11), its characterized in that on extruding shaft (1) in bearing frame (3) in proper order: still include floating bearing frame (6), floating bearing frame (6) cup joint in keeping away from bearing frame (3) of extruding spiral (12) one end, floating bearing frame (6) and extrusion axle (1) sealing connection, the external diameter of the one end of bearing frame (3) is less than the internal diameter of bearing frame (3) in floating bearing frame (6), and floating bearing frame (6) are through the floating bearing frame set screw (7) fixed connection of terminal surface on bearing frame (3), second double-row roller bearing (11) set up in floating bearing frame (6), are equipped with a plurality of floating bearing frame adjusting screw (5) that run through bearing frame (3) and offset with floating bearing frame (6) on the outer wall of bearing frame (3), leave the clearance between the outer lane of thrust self-aligning roller bearing (10) and the internal diameter of bearing frame (3).

2. The floating support structure of an extrusion shaft of an extruder as set forth in claim 1, wherein: the plurality of floating bearing seat adjusting screws (5) are uniformly distributed on the circumferential surface of the bearing seat (3).

3. The floating support structure of an extrusion shaft of an extruder as set forth in claim 1, wherein: the clearance between the outer ring of the self-aligning thrust roller bearing (10) and the inner diameter of the bearing seat (3) is 0.5-1 mm.

4. The floating support structure of an extrusion shaft of an extruder as set forth in claim 1, wherein: one end, close to the extrusion screw, of the bearing seat is fixedly connected with a sealing cover (2), and the sealing cover (2) is in sealing connection with the extrusion shaft (1).

5. The floating support structure of an extrusion shaft of an extruder as set forth in claim 1, wherein: the inner wall of one side of the bearing seat close to the floating bearing seat is provided with a check ring, the thrust self-aligning roller bearing (10) is attached to the check ring and installed on the extrusion shaft (1), and a shaft sleeve (9) is arranged on the extrusion shaft (1) between the first double-row roller bearing (8) and the thrust self-aligning roller bearing (10).

6. The floating support structure of an extrusion shaft of an extruder as set forth in claim 1, wherein: and the bearing seat is provided with an oil cup (4) used for injecting lubricating oil into the bearing seat.