Round silo center slewing bearing mechanism

Abstract

The utility model discloses a circular silo center slewing bearing mechanism, which comprises a center cylinder, a center slewing assembly, a slewing bearing and a fixed steel platform, the lower end of the center cylinder is provided with a cylinder lower flange, the top of the center slewing assembly is fixedly provided with a slewing main seat plate, and the slewing bearing is provided with a slewing bearing. A platform cover plate is fixed to the top of the fixed steel platform, a sealing material guide ring is arranged between the bottom of the lower barrel flange and the top of the inner edge of the rotary main seat plate, and the bottom of the lower barrel flange and the top of the inner edge of the rotary main seat plate are fixedly connected through bolts. The platform cover plate is fixed above the inner ring of the slewing bearing through screws, the outer circumference of the sealing material guide ring is in clearance fit with the inner circumference of the platform cover plate, annular grooves are formed in the bottom of the inner edge of the platform cover plate and the corresponding positions of the slewing main seat plate respectively, and sealing packing is embedded in the annular grooves and the slewing main seat plate together. According to the mechanism, leaked materials can be prevented from entering the slewing bearing, blocking is avoided, and the service life of the bearing is greatly prolonged.

Description

Technical Field

[0001] This utility model relates to a silo discharge machine, and more particularly to a central rotary support mechanism for a circular silo, belonging to the technical field of silo discharge equipment. Background Technology

[0002] Grains, soybean meal, and other materials are typically stored long-term in silos, i.e., circular silos. For example, Chinese invention patent CN107187893B discloses a discharge device for a circular silo. The bottom of the silo is equipped with a discharge machine that conveys material along the silo's radius. The inner end of the discharge machine connects to a central cylinder. The top of the central cylinder is covered with a conical cap. A lower flange is welded to the bottom of the central cylinder and bolted to a rotating main support plate. The rotating main support plate is fixedly connected to the top of the inner ring of a slewing bearing. A fixed steel platform is located at the center of the silo's bottom, and a platform cover is fixed to the top of the platform. The platform cover is fixedly connected to the outer ring of the slewing bearing. This allows the lower end of the central cylinder to be supported on the central platform via the slewing bearing. The discharge machine uses an auger to convey material from the outer periphery into the central cylinder, and the material revolves around the silo's axis, achieving full circumferential discharge.

[0003] Because the central cylinder is a welded component, there is welding deformation in the lower flange of the cylinder; there is a 2-8mm gap between the outer wall of the central cylinder and the inner ring of the platform cover plate. To protect the slewing bearing, an annular groove is provided between the bottom inner edge of the platform cover plate and the slewing main seat plate, and a sealing packing is installed for sealing.

[0004] When the slewing machine revolves, fine materials can get stuck in the gap between the outer wall of the central cylinder and the platform cover, causing the machine to stagnate and become difficult to rotate. Furthermore, the sealing packing will wear down after a period of operation, and some material can squeeze through the packing and enter the slewing bearing, easily causing damage. In practice, slewing bearings often experience severe jamming or even damage after 2-3 years of use. Disassembly and installation are labor-intensive and take up to a month; return to the factory for repair takes even longer, resulting in high disassembly and repair costs, prolonged factory downtime, and significant losses due to downtime. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0007] The purpose of this invention is to overcome the problems existing in the prior art and provide a central slewing bearing mechanism for a circular silo, which can prevent material leakage into the slewing gap and slewing bearing, avoid jamming, and greatly extend the service life of the bearing.

[0008] To solve the above technical problems, this utility model provides a circular silo center slewing support mechanism, including a central cylinder, a central slewing assembly, a slewing support bearing, and a fixed steel platform. The lower end of the central cylinder is provided with a lower flange. A slewing main seat plate is fixed to the top of the central slewing assembly, and a platform cover plate is fixed to the top of the fixed steel platform. A sealing guide ring is provided between the bottom of the lower flange and the top of the inner edge of the slewing main seat plate, and the three are fixedly connected by bolts. The outer edge of the slewing main seat plate is fixed to the top of the inner ring of the slewing support bearing by screws. The platform cover plate is fixed above the inner ring of the slewing support bearing by screws. The outer circumference of the sealing guide ring and the inner circumference of the platform cover plate are clearance-fitted. The bottom of the inner edge of the platform cover plate and the corresponding position of the slewing main seat plate are respectively provided with annular grooves, which are jointly embedded with sealing packing.

[0009] As an improvement of this utility model, the lower surface of the sealing guide ring is provided with a plurality of swirl guide grooves that discharge material inward.

[0010] As a further improvement of this utility model, the gap between the outer periphery of the sealing guide ring and the inner periphery of the platform cover plate is 0.50mm.

[0011] As a further improvement of this utility model, the inner circumference of the sealing guide ring is provided with a plurality of guide ring grooves, and each guide ring groove is embedded with a force transmission pin, the lower end of each force transmission pin being fixed in the rotary main seat plate.

[0012] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. The sealing guide ring is added to reduce the gap between the dynamic and static structures, reduce material leakage, and avoid jamming; a rotary guide groove is added to the lower end face of the sealing guide ring to guide a small amount of leaked material toward the central hole, protecting the sealing packing and the slewing bearing.

[0013] 2. The lifespan of slewing bearings is increased to 10 years, maintenance costs of silo unloading machines are reduced by 70%, and the utilization rate of enterprise silo equipment is increased by more than 20%. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein:

[0015] Figure 1 This is the front view of the unloading machine;

[0016] Figure 2 This is a top view of the unloading machine;

[0017] Figure 3 This is a front view of the central part of the unloading machine;

[0018] Figure 4 for Figure 1 Enlarged view of part A in the middle;

[0019] Figure 5 A three-dimensional view of the sealing guide ring and the rotary main seat plate during assembly;

[0020] Figure 6 This is a three-dimensional view of the sealing guide ring from a bottom angle.

[0021] In the diagram: 1. Conical cap; 2. Central cylinder; 2a. Lower flange of cylinder; 3. Fixed steel platform; 3a. Platform cover plate; 4. Sealing guide ring; 4a. Rotary guide groove; 4b. Guide ring groove; 5. Central rotary assembly; 5a. Rotary main seat plate; 6. Rotary bearing; 6a. Inner ring; 6b. Outer ring; 7. Sealing packing; 8. Force transmission pin; 9. Outlet machine; 10. Outlet drive mechanism; 11. Circular track. Detailed Implementation

[0022] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0023] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] like Figures 1 to 6As shown, the circular silo center slewing support mechanism of this utility model includes a center cylinder 2, a center slewing assembly 5, a slewing support bearing 6, and a fixed steel platform 3. The lower end of the center cylinder 2 is provided with a lower cylinder flange 2a, the top of the center slewing assembly 5 is fixed with a slewing main seat plate 5a, and the top of the fixed steel platform 3 is fixed with a platform cover plate 3a.

[0026] The cone cap 1 is fixedly connected to the upper port of the central cylinder 2. The bottom of the central cylinder 2 is welded with a lower flange 2a. The traditional method is to directly connect and fix the lower flange 2a to the slewing main seat plate 5a with bolts. The bottom edge of the slewing main seat plate 5a is fixedly connected to the top of the inner ring 6a of the slewing bearing 6 with screws. A fixed steel platform 3 is provided at the bottom center of the silo. A platform cover plate 3a is fixed to the top of the fixed steel platform 3. The bottom edge of the platform cover plate 3a is fixedly connected to the outer ring 6b of the slewing bearing 6 with screws.

[0027] The discharge machine 9 extends along the radius of the silo, with its inner outlet connected to the central cylinder 2, and its outer end close to the inner wall of the silo. An auger is located at the front of the discharge machine in its forward direction, driven by the discharge drive mechanism 10 to rotate and convey material from the outer periphery into the central cylinder. Furthermore, the outer end of the discharge machine 9 travels along the annular track 11 on the inner wall of the silo, while the inner end of the discharge machine 9 rotates around the silo axis with the rotating main seat plate 5a and the inner ring 6a of the slewing bearing 6, thus achieving the revolution of the discharge machine 9 and enabling full-circumferential discharge.

[0028] Since the central cylinder 2 is a welded component, the lower flange 2a of the cylinder is subject to welding deformation. There is a certain gap between the outer wall of the central cylinder 2 and the inner circumference of the platform cover plate 3a, normally 2-8mm. During operation, the outer ring 6b of the slewing bearing 6 is fixed, while the inner ring rotates with the central cylinder 2. Self-sealing gaskets are provided at the top and bottom of the gap between the inner and outer rings. An annular groove is provided between the bottom of the inner edge of the platform cover plate 3a and the slewing main seat plate 5a, and a sealing packing 7 is embedded therefor sealing.

[0029] When the discharge machine revolves, fine materials may get stuck in the gap between the outer wall of the central cylinder 2 and the platform cover plate 3a, causing the discharge machine to rotate poorly and become stuck. Some materials may squeeze through the sealing packing 7 and enter the slewing bearing 6, which may cause the slewing bearing 6 to be damaged prematurely.

[0030] This unloading machine adds a sealing guide ring 4 between the lower flange 2a of the cylinder and the rotary main seat plate 5a. The sealing guide ring 4 is a precision-machined part. The lower flange 2a of the cylinder, the sealing guide ring 4, and the rotary main seat plate 5a are fixedly connected by screws. The gap between the outer circumference of the sealing guide ring 4 and the inner circumference of the platform cover plate 3a can be reduced to 0.50mm, which greatly reduces the running gap and prevents material jamming. The lower surface of the sealing guide ring 4 has multiple rotary guide grooves 4a. During counterclockwise rotation, materials stuck in the gap can be discharged through the rotary guide grooves 4a. The materials will not enter the rotary bearing 6, thereby extending the service life and greatly reducing maintenance costs.

[0031] The inner circumference of the sealing guide ring 4 is provided with multiple guide ring grooves 4b, and each guide ring groove 4b is embedded with a force transmission pin 8. The lower end of each force transmission pin 8 is fixed in the rotary main seat plate 5a. Each force transmission pin 8 transmits torque between the sealing guide ring 4 and the rotary main seat plate 5a, avoiding stress on the bolts used for connection.

[0032] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A center slewing bearing mechanism of a circular silo, comprising a center cylinder (2), a center slewing assembly (5), a slewing bearing (6) and a fixed steel platform (3), a cylinder lower flange (2a) is arranged at a lower end of the center cylinder (2), a slewing main base plate (5a) is fixed at a top of the center slewing assembly (5), a platform cover plate (3a) is fixed at a top of the fixed steel platform (3), characterized in that: The bottom of the lower flange (2a) of the cylinder body and the top of the inner edge of the rotary main base plate (5a) are provided with a sealing material guiding ring (4) and are fixedly connected by bolts, the outer edge of the rotary main base plate (5a) is fixed on the top of the inner ring of the rotary support bearing (6) by screws, the platform cover plate (3a) is fixed above the inner ring of the rotary support bearing (6) by screws, the outer periphery of the sealing material guiding ring (4) is gap-fitted with the inner periphery of the platform cover plate (3a), and the bottom of the inner edge of the platform cover plate (3a) and the corresponding position of the rotary main base plate (5a) are respectively provided with annular grooves and are jointly embedded with sealing packing (7).

2. A circular silo central rotary bearing mechanism according to claim 1, characterized in that: The lower surface of the sealing material guiding ring (4) is provided with a plurality of inwardly circumferential material guiding grooves (4a).

3. A circular silo central rotary bearing mechanism according to claim 1, characterized in that: The gap between the outer periphery of the sealing material guiding ring (4) and the inner periphery of the platform cover plate (3a) is 0.50mm.

4. A circular silo central rotary bearing mechanism according to claim 1 or 2 or 3, characterized in that: The inner periphery of the sealing material guiding ring (4) is provided with a plurality of material guiding ring grooves (4b), each of which is embedded with a force transmission pin (8), and the lower end of each force transmission pin (8) is fixed in the rotary main base plate (5a).

Images