Stirring shaft bearing used in sugar boiling tank

Abstract

The utility model provides a stirring shaft bearing used in a sugar boiling tank of a sugar refinery, which is characterized in that a bearing inner ring is formed by splicing two inner ring semi-ring bodies, and a bearing outer ring is formed by splicing two outer ring semi-ring bodies; a group of rollers are arranged in an annular raceway between the outer circumference of the bearing inner ring and the inner circumference of the bearing outer ring; horizontal check rings for restraining the upper and lower positions of the rollers are fixedly mounted at the upper end and the lower end of the bearing outer ring respectively, each of the upper check ring and the lower check ring is formed by splicing two check ring semi-ring bodies, an inner ring of each check ring extends towards the inner side of the bearing outer ring, and a gap is reserved between the inner ring of each check ring and the outer circumference of the bearing inner ring; and the outer circumference of the bearing outer ring is also provided with a fixing plate which is connected with a corresponding part in the sugar boiling tank. The bearing inner ring, the bearing outer ring, the upper check ring and the lower check ring of the stirring shaft bearing all adopt split split type design, so that the stirring shaft bearing is more suitable for the working condition of a stirring shaft in a sugar boiling tank, is good in durability and extremely simple and convenient to install and maintain, and does not need to consider the influence of other parts on the stirring shaft.

Description

Technical Field

[0001] The utility model relates to a bearing, in particular to a stirring shaft bearing used in a sugar boiling tank in a sugar factory, belonging to the technical field of supporting components of stirring equipment in the sugar factory. Background Art

[0002] The sugar boiling tank in the sugar factory is a vertically installed tank. Adding a forced stirring device in the tank can enhance the heat exchange of the syrup, improve thermal efficiency, and have a very obvious energy-saving effect. The power and frame of the stirring device are generally installed vertically on the top of the sugar boiling tank. The vertical stirring shaft of the stirring device extends from top to bottom into the central downcomer inside the sugar boiling tank to drive the paddles, thereby promoting the flow of syrup in the tank and heat exchange with the heating tubes. The length of the stirring shaft of the sugar boiling tank depends on the height of the tank body, which is generally 4-6 meters. Due to the narrow and long shaft body, a bearing needs to be set on the shaft section near the lower end paddle to provide support for the stirring shaft to avoid the load impact during operation causing the lower cantilever shaft end to swing. Since the bearing is located in the sugar boiling tank and is immersed in syrup for a long time, the syrup is also mixed with crystallized sugar particles that are constantly precipitated. The working environment is relatively harsh. The bearing used needs to fully consider the durability of the product and the convenience of disassembly and maintenance in the tank.

[0003] Bearings are divided into two categories: sliding bearings and rolling bearings according to their friction properties. The bearing shells of sliding bearings are easy to wear and the wear materials will cause great pollution to the syrup. Therefore, the bearings used in this working condition must be rolling bearings. In addition, in order to withstand large loads and improve durability, roller bearings should be selected among rolling bearings. The inner and outer rings of conventional roller bearings are integral. If used in this occasion, the blades and blade fixing seats at the lower end of the stirring shaft need to be removed before disassembly and assembly. Due to the limited space in the sugar pot, disassembly and assembly are very inconvenient. In addition, the rollers of conventional roller bearings are equipped with cages, and the gaps between the rollers are filled with grease. If used in a sugar pot, the bearings cannot be filled with grease to avoid contaminating the syrup. The crystallized sugar particles precipitated from the syrup in the sugar pot are easily stuck in the gap between the cage and the roller and cannot be discharged, causing the bearing to be easily stuck and burned. Therefore, we need to redesign a bearing that is more suitable for this working condition, and at the same time, we must also consider its convenience in disassembly and maintenance in the sugar pot. Utility Model Content

[0004] The utility model aims to provide a stirring shaft bearing for a sugar boiling tank in a sugar factory, so as to solve the problem that the existing bearing is not suitable for the working condition in the sugar boiling tank.

[0005] The specific technical solutions adopted by this utility model are as follows:

[0006] A stirring shaft bearing for use in a sugar boiling tank in a sugar factory, comprising a bearing inner ring which is arranged vertically and matches the outer diameter of the stirring shaft, the bearing inner ring being composed of two inner ring half rings, the two inner ring half rings being provided with vertically outwardly extending butt joint plates at the upper and lower ends of the joint surface, and the two inner ring half rings being fixedly joined together by an inner ring butt joint bolt assembly which horizontally penetrates the two inner ring half rings butt joint plates; a vertical bearing outer ring which is smaller in height than the bearing inner ring is provided at the upper and lower middle positions on the outside of the bearing inner ring, the bearing outer ring being composed of two outer ring half rings, the two outer ring half rings being provided with vertically outwardly extending butt joint end plates at the joint surface, and the two outer ring half rings being fixedly joined together by an outer ring butt joint bolt assembly which horizontally penetrates the two outer ring half rings butt joint end plates; a vertical bearing outer ring which is smaller in height than the bearing inner ring is provided at the upper and lower middle positions on the outside of the bearing inner ring, A group of evenly distributed vertical cylindrical rollers that can roll along the annular raceway is placed in the annular raceway between the inner circumferences of the outer rings, and the height of the rollers is less than that of the outer ring of the bearing; horizontal retaining rings are fixedly installed at the upper and lower ends of the outer ring of the bearing to constrain the upper and lower positions of the rollers, and the upper and lower retaining rings are composed of two retaining ring half-rings and are fixedly connected to the upper and lower end faces of the outer ring of the bearing through retaining ring fixing screw assemblies, and the inner ring of the retaining ring extends to the inner side of the outer ring of the bearing and leaves a gap between the outer circumference of the inner ring of the bearing; the upper and lower ends of the inner ring of the bearing extend out of the upper and lower retaining rings for a distance, respectively, so that the docking ear plates of the inner ring of the bearing are exposed outward and do not interfere with the movement of the retaining ring; a fixing plate for connecting with the corresponding parts inside the sugar pot is also provided on the outer circumference of the outer ring of the bearing.

[0007] The stirring shaft bearing of the utility model adopts a half-split design because its bearing inner ring, bearing outer ring and upper and lower retaining rings are all designed. When installing and disassembling on the stirring shaft in the sugar pot, it is not necessary to remove the paddle and paddle fixing seat at the lower end of the stirring shaft, and the operation is very convenient. Moreover, when the roller of the bearing is worn, it is only necessary to disassemble the upper retaining ring to replace it. In addition, since the bearing is not provided with a roller retainer, the crystallized sugar particles precipitated from the syrup of the sugar pot are not easy to accumulate after entering the bearing. When the bearing rotates, it can be quickly discharged from the gap between the inner ring of the retaining ring and the inner ring of the bearing and the gap between the rollers, and it is not easy to cause the bearing to get stuck and burn. Therefore, the stirring bearing is more suitable for the working condition of the stirring shaft inside the sugar pot, and it has good durability. Moreover, the installation and maintenance of the entire bearing are extremely simple and convenient, and there is no need to consider the influence of other components on the stirring shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the front view of the stirring shaft bearing.

[0009] Figure 2 This is a top view of the stirring shaft bearing.

[0010] Figure 3 for Figure 1 AA section view.

[0011] Figure 4 This is a three-dimensional diagram of the stirring shaft bearing.

[0012] Figure 5 This is a schematic diagram of the installation of the stirring shaft bearing when it is installed on the stirring shaft in the sugar boiling tank.

[0013] In the figure: 1-bearing inner ring, 1.1-docking ear plate, 1.2-positioning screw hole, 2-inner ring docking bolt assembly, 3-bearing outer ring, 3.1-docking end plate, 4-outer ring docking bolt assembly, 5-roller, 6-retaining ring, 7-retaining ring fixing screw assembly, 8-fixing plate, 9-agitation shaft, 10-bearing fixing channel steel, 11-center downcomer, 12-blade and blade fixing seat. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the embodiments and drawings. In the description of the present invention, the directional words "front", "back", "left", "right", "up", and "down" are based on the attached description. Figure 1 The orientation or position relationship shown is only defined to facilitate the description of the present invention, rather than referring to a specific orientation that a device or element must have, and should not be regarded as a limitation to the present invention.

[0015] like Figure 1-4As shown, the agitator shaft bearing is provided with a vertically arranged bearing inner ring 1 which matches the outer diameter of the agitator shaft. The bearing inner ring 1 is composed of two inner ring half rings, and the two inner ring half rings are provided with vertically outward-extending docking ear plates 1.1 at the upper and lower ends of the splicing surface. The two inner ring half rings are fixedly spliced ​​together by an inner ring docking bolt assembly 2 which horizontally penetrates the two inner ring half ring docking ears 1.1; the outer part of the bearing inner ring 1 is provided with a vertical bearing outer ring 3 which is less in height than the bearing inner ring 1 at the upper and lower center positions. The bearing outer ring 3 is composed of two outer ring half rings, and the two outer ring half rings are provided with vertically outward-extending docking end plates 3.1 at the splicing surface. The two outer ring half rings are fixedly spliced ​​together by an outer ring docking bolt assembly 4 which horizontally penetrates the two outer ring half ring docking end plates 3.1; between the outer circumference of the bearing inner ring 1 and the inner circumference of the bearing outer ring 3 A group of evenly distributed vertical cylindrical rollers 5 that can roll along the annular raceway are placed in the annular raceway between the bearings, and the height of the rollers 5 is less than that of the bearing outer ring 3; horizontal retaining rings 6 that constrain the upper and lower positions of the rollers 5 are fixedly installed at the upper and lower ends of the bearing outer ring 3, respectively. The upper and lower retaining rings 6 are composed of two retaining ring half-rings and are fixedly connected to the upper and lower end faces of the bearing outer ring 3 through retaining ring fixing screw assemblies 7, respectively. The inner ring of the retaining ring 6 extends to the inner side of the bearing outer ring 3 and leaves a gap with the outer circumference of the bearing inner ring 1; the upper and lower ends of the bearing inner ring 1 extend out of the upper and lower retaining rings 6 for a distance, respectively, so that the docking ear plates 1.1 of the bearing inner ring 1 are exposed outward and do not interfere with the movement of the retaining ring 6; a fixing plate 8 for connecting with the corresponding parts inside the sugar pot is also provided on the outer circumference of the bearing outer ring 3.

[0016] Furthermore, four vertical fixing plates 8 evenly distributed along the circumference and radially extending outward are fixedly welded to the outer circumference of the bearing outer ring 3, and mounting holes are provided on the fixing plates 8. By connecting the four fixing plates 8 with the bearing fixing channel steel 10 welded in the central downcomer 11 of the sugar boiling pot, the bearing can be fixedly mounted at a position close to the center of the central downcomer 11 of the sugar boiling pot.

[0017] In order to further prevent the bearing inner ring 1 and the stirring shaft 9 from rotating relative to each other, the upper and lower ends of the two inner ring half-rings of the bearing inner ring 1 are provided with positioning screw holes 1.2 for the penetration of fixing screws at the parts exposed outside the upper and lower retaining rings 6. When the bearing is installed, the two inner ring half-rings are clamped and fixed on the outer periphery of the stirring shaft 9, and the fixing screws are screwed into the positioning screw holes 1.2 to completely lock the bearing inner ring 1 and the stirring shaft 9.

[0018] In order to effectively prevent the fasteners from loosening, the inner ring butt bolt assembly 2, the outer ring butt bolt assembly 4 and the retaining ring fixing screw assembly 7 all adopt fasteners with anti-loosening structures, wherein the inner ring butt bolt assembly 2 and the outer ring butt bolt assembly 4 are both composed of hexagonal slotted nuts, bolts with holes on the rod and cotter pins (not shown in the figure), and the retaining ring fixing screw assembly 7 is composed of a screw with a hole on the head and a spring washer, and a series steel wire (not shown in the figure) is provided to connect the screws with holes on the head in series to prevent loosening.

[0019] like Figure 5 As shown, when installing the stirring shaft bearing, without removing the blade and blade fixing seat 12 at the lower end of the stirring shaft 9, it is only necessary to clamp and fix the two inner ring half ring bodies of the bearing inner ring 1 on the outer periphery of the stirring shaft 9 so that it rotates with the stirring shaft 9, and the two outer ring half ring bodies of the bearing outer ring 3 are assembled on the outer periphery of the bearing inner ring 1, and the retaining ring 6 at the lower end of the bearing outer ring 3 is installed. The roller 5 is placed in the annular raceway between the bearing inner ring 1 and the bearing outer ring 3, and then the retaining ring 6 on the upper part of the bearing outer ring 3 is installed. The fixing plate 8 of the bearing outer ring 3 is connected to the bearing fixing channel steel 10 welded in the central liquid drop cylinder 11 of the sugar pot, and the bearing can be fixedly mounted at the upper center of the central liquid drop cylinder 11 of the sugar pot. When disassembling, it can be carried out in the opposite order. When it is necessary to replace the worn roller 5, it is only necessary to disassemble the retaining ring 6 on the upper part of the bearing outer ring 3 to replace it. It can be seen that the disassembly, assembly and maintenance of the agitator shaft bearing can be carried out directly without considering the influence of other components on the agitator shaft 9, and the installation, use and maintenance efficiency is significantly improved.

[0020] The above-mentioned figures are only typical embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stirring shaft bearing for use in a sugar boiling tank in a sugar factory, characterized by: The stirring shaft bearing is provided with a bearing inner ring (1) which is arranged vertically and matches the outer diameter of the stirring shaft. The bearing inner ring (1) is composed of two inner ring half ring bodies, and the two inner ring half ring bodies are provided with vertically outward-extending docking ear plates (1.1) at the upper and lower ends of the splicing surface. The two inner ring half ring bodies are fixedly spliced ​​together by an inner ring docking bolt assembly (2) which horizontally penetrates the two inner ring half ring bodies and the docking ear plates (1.1). The outer part of the bearing inner ring (1) is provided with a vertical bearing outer ring (3) which is smaller in height than the bearing inner ring (1) at the upper and lower center position. The bearing outer ring (3) is composed of two outer ring half ring bodies, and the two outer ring half ring bodies are provided with vertically outward-extending docking end plates (3.1) at the splicing surface. The two outer ring half ring bodies are fixedly spliced ​​together by an outer ring docking bolt assembly (4) which horizontally penetrates the two outer ring half ring bodies and the docking end plates (3.1). An annular portion is provided between the outer circumference of the bearing inner ring (1) and the inner circumference of the bearing outer ring (3). A group of evenly distributed vertical cylindrical rollers (5) are placed in the raceway and can roll along the annular raceway. The height of the rollers (5) is less than the height of the bearing outer ring (3). Horizontal retaining rings (6) are fixedly installed at the upper and lower ends of the bearing outer ring (3) to constrain the upper and lower positions of the rollers (5). The upper and lower retaining rings (6) are composed of two retaining ring half-ring bodies and are fixedly connected to the upper and lower end faces of the bearing outer ring (3) through retaining ring fixing screw assemblies (7). The inner ring of the retaining ring (6) extends toward the inner side of the bearing outer ring (3) and a gap is left between the inner ring and the outer circumference of the bearing inner ring (1). The upper and lower ends of the bearing inner ring (1) extend out of the upper and lower retaining rings (6) for a distance, so that the docking ear plate (1.1) of the bearing inner ring (1) is exposed to the outside and does not interfere with the movement of the retaining ring (6). A fixing plate (8) for connecting with the corresponding parts inside the sugar pot is also provided on the outer circumference of the bearing outer ring (3).

2. The stirring shaft bearing for use in a sugar boiling tank in a sugar factory according to claim 1, characterized in that: Four vertical fixing plates (8) evenly distributed along the circumference and extending radially outward are fixedly welded to the outer circumference of the bearing outer ring (3), and mounting holes are provided on the fixing plates (8).

3. The stirring shaft bearing for use in a sugar boiling tank in a sugar factory according to claim 1, characterized in that: Positioning screw holes (1.2) for the passage of set screws are provided at the upper and lower ends of the two inner ring half bodies of the bearing inner ring (1) in the portion exposed outside the upper and lower retaining rings (6).

4. The stirring shaft bearing for use in a sugar boiling tank in a sugar factory according to claim 1, characterized in that: The inner ring butt bolt assembly (2), the outer ring butt bolt assembly (4) and the retaining ring fixing screw assembly (7) all use fasteners with an anti-loosening structure, wherein the inner ring butt bolt assembly (2) and the outer ring butt bolt assembly (4) are both composed of a hexagonal slotted nut, a bolt with a hole on the rod and a cotter pin, and the retaining ring fixing screw assembly (7) is composed of a screw with a hole on the head and a spring washer, and a series wire is provided to connect the screws with holes on the head in series to prevent them from loosening.

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