Sealing structure between rotating shaft and barrel in pellet mixing machine
By combining a split cylinder, bushing structure, and graphite packing, the sealing problem of the sealing structure in the pellet mixer under high temperature environment is solved, achieving high-efficiency sealing performance and easy maintenance.
Patent Information
- Application Number
- CN202422952668.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The sealing structure between the rotating shaft and the cylinder in existing pellet mixers is easily damaged in high-temperature environments, leading to air and dust leakage and affecting the mixing effect.
It adopts a split cylindrical body and bushing structure, combined with graphite packing and skeleton sealing ring. It utilizes the high temperature resistance of graphite packing and the lubrication design of split bearing to improve sealing performance, and enhances structural stability through bolt connection.
It maintains good sealing performance under high temperature and high pressure conditions, extends the service life of the skeleton seal ring, prevents air and material leakage, and improves maintenance efficiency.
Smart Images
Figure CN223469724U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pellet mixer, in particular to a sealing structure between a rotating shaft and a cylinder in the pellet mixer. Background Art
[0002] The pellet mixer is the main equipment for producing oxidized pellets or metallized pellets. The pellet mixer uses an electric reducer to drive the shaft at a speed of 60 to 100 r / min to mix the materials evenly. The sealing structure between the shaft and the cylinder of the pellet mixers currently on the market is mostly the same, such as Figure 1 As shown, a skeleton seal ring is provided at the end of the cylinder. After the rotating shaft passes through the cylinder, it is sealed against the skeleton seal ring, thereby sealing the rotating shaft and the cylinder. However, during the strong mixing process, due to friction and extrusion between the materials, a certain amount of heat is generated, causing the temperature inside the cylinder to rise. In addition, other links in the pellet production line, such as roasting, also involve high-temperature environments. For example, the temperature of the roasting section in the belt roaster pellet production line will reach a high level to meet the requirements of pellet roasting. Although these high temperatures mainly occur in the roasting link, the entire production line is an interconnected system, and there may be a certain amount of heat transfer and influence between each link. The high temperature of the cylinder itself and the high temperature transmitted from the production line will affect the skeleton seal ring, reducing its service life. If the skeleton seal ring fails, problems such as air leakage and ash leakage will occur, affecting the mixing effect of the pellet mixer. Utility Model Content
[0003] The utility model aims to provide a sealing structure between a rotating shaft and a cylinder in a pellet mixer which has good sealing effect and is convenient to assemble and disassemble.
[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a sealing structure between the rotating shaft and the cylinder in the pellet mixer, comprising: a split cylinder and a rotating shaft, a split shaft sleeve is sealed on the left and right side walls of the split cylinder, a bearing groove is provided in the split shaft sleeve, a split bearing is clamped in the bearing groove, a first graphite packing is provided at one end of the split shaft sleeve connected to the split cylinder, a skeleton sealing ring is provided at one end of the split shaft sleeve away from the split cylinder, and two ends of the rotating shaft are sealed. Each shaft neck extends into two split shaft sleeves respectively, the shaft neck of the rotating shaft is sealed with the first graphite packing and the skeleton sealing ring in the split shaft sleeve on the same side, the shaft neck of the rotating shaft cooperates with the split bearing in the split shaft sleeve on the same side, an end cover is provided on the split shaft sleeve, the end cover rests on the skeleton sealing ring, the shaft neck is connected to the reduction motor after passing through the end cover, an oil filling hole is opened on the split shaft sleeve, a drainage groove connected to the oil filling hole is provided on the bearing groove, and an oil nozzle is threadedly connected to the oil filling hole.
[0005] Further, the sealing structure between the rotating shaft and the barrel of the aforementioned balling mixer, wherein the split barrel comprises: an upper half barrel and a lower half barrel, the split shaft sleeve comprises: an upper half sleeve and a lower half sleeve, the upper half sleeve is fully welded at the left and right ends of the upper half barrel, the axis of the upper half barrel coincides with the axis of the upper half sleeve, the lower half sleeve is fully welded at the left and right ends of the lower half barrel, the axis of the lower half barrel coincides with the axis of the lower half sleeve, the first connecting parts are outwardly extended on the front and rear sidewalls of the upper half barrel and the lower half barrel, the first connecting parts of the upper half barrel and the lower half barrel are connected by bolts when the upper half barrel and the lower half barrel are closed, the second connecting parts are outwardly extended on the front and rear sidewalls of the upper half sleeve and the lower half sleeve, the second connecting parts of the upper half sleeve and the lower half sleeve are connected by bolts when the upper half sleeve and the lower half sleeve are closed.
[0006] Further, the sealing structure between the rotating shaft and the barrel of the aforementioned balling mixer, wherein the first sealing grooves are arranged between the top walls of the two first connecting parts of the lower half barrel and the top walls of the left and right ends of the lower half barrel, the second graphite packing is clamped in the first sealing grooves, the second graphite packing on the first connecting parts of the upper half barrel and the lower half barrel is sealed and closed when the upper half barrel and the lower half barrel are closed, the second sealing grooves are arranged on the top walls of the lower half sleeve, the third graphite packing is clamped in the second sealing grooves, the third graphite packing is located between the first graphite packing and the bearing groove, and the bottom wall of the upper half sleeve is sealed and closed with the third graphite packing of the lower half sleeve when the upper half sleeve and the lower half sleeve are closed.
[0007] Further, the sealing structure between the rotating shaft and the barrel of the aforementioned balling mixer, wherein the connecting half circular holes are formed on the left and right sidewalls of the upper half barrel and the lower half barrel, the upper half sleeve is clamped in the connecting half circular hole of the upper half barrel, and the second connecting part of the upper half sleeve abuts against the connecting half circular hole of the upper half barrel, the lower half sleeve is clamped in the connecting half circular hole of the lower half barrel, and the second connecting part of the lower half sleeve abuts against the connecting half circular hole of the lower half barrel.
[0008] Further, the sealing structure between the rotating shaft and the barrel of the aforementioned balling mixer, wherein the upper half sleeve and the lower half sleeve are fully welded with the inner and outer walls of the corresponding connecting half circular holes.
[0009] Further, the sealing structure between the rotating shaft and the barrel of the aforementioned balling mixer, wherein two first graphite packings are arranged at the joint end of the split shaft sleeve and the split barrel, and the abutting ends of the two first graphite packings are staggered.
[0010] The advantages of the present invention are: by arranging a split cylinder and arranging a split shaft sleeve on the split cylinder, the installation and maintenance of the rotating shaft are convenient; a first graphite packing, a split bearing and a skeleton sealing ring are arranged in the split shaft sleeve; the first graphite packing is arranged on the end connected to the split shaft sleeve and the split cylinder, and can make the connection between the rotating shaft and the split shaft sleeve have good sealing performance under high temperature, high pressure and high speed through its high temperature resistance and wear resistance, and prevent air leakage and material leakage; the skeleton sealing ring is arranged on the end of the split shaft sleeve away from the split cylinder, which can reduce the influence of high temperature, increase the service life of the skeleton sealing ring, and prevent external dust from entering the split shaft sleeve and affecting the rotation of the rotating shaft; the arrangement of the split bearing can ensure the rotation flexibility of the rotating shaft; lubricant can be injected into the oil filling hole through the oil nozzle, so that the split bearing can be lubricated, and the split bearing can maintain good rotation flexibility under high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The present invention is a structural diagram of a sealing structure between a rotating shaft and a cylinder in an existing pellet mixer.
[0012] Figure 2 It is a structural schematic diagram of the sealing structure between the rotating shaft and the cylinder in the pellet mixer described in the present invention.
[0013] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure in the AA direction.
[0014] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction.
[0015] Figure 5 It is a structural diagram of a split cylinder. DETAILED DESCRIPTION
[0016] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.
[0017] like Figures 2 to 5The utility model discloses a sealing structure between the rotating shaft and the cylinder of the ball mixing machine, which comprises a split cylinder and a rotating shaft, a split shaft sleeve is arranged at the left and right ends of the split cylinder, a bearing groove is arranged in the split shaft sleeve, a split bearing is arranged in the bearing groove, the split bearing is a prior art and will not be described here, two first graphite packing rings are arranged at one end of the split shaft sleeve connected with the split cylinder, the abutting ends of the two first graphite packing rings are staggered, a skeleton sealing ring is arranged at the other end of the split shaft sleeve away from the split cylinder, the two shaft necks of the rotating shaft are inserted into the two split shaft sleeves respectively, the shaft neck of the rotating shaft is sealingly attached with the first graphite packing ring and the skeleton sealing ring in the split shaft sleeve on the same side, the shaft neck of the rotating shaft is matched with the split bearing in the split shaft sleeve on the same side, an end cover is arranged on the split shaft sleeve, the end cover abuts against the skeleton sealing ring, the shaft neck of the rotating shaft is connected with a speed reducer after penetrating through the end cover, the speed reducer is not shown in the figure, an oil injection hole is formed in the split shaft sleeve, a drainage groove is arranged in the bearing groove and connected with the oil injection hole, and an oil nozzle is threadedly connected to the oil injection hole.
[0018] The split shaft sleeve is arranged between the rotating shaft and the split cylinder, the first graphite packing ring is arranged between the one end of the split shaft sleeve connected with the split cylinder and the rotating shaft to seal them, the first graphite packing ring has high temperature resistance and high wear resistance, so that the connection between the rotating shaft and the split shaft sleeve has good sealing performance under high temperature, high pressure and high speed, two first graphite packing rings are arranged between the split shaft sleeve and the rotating shaft, the abutting ends of the two first graphite packing rings are staggered to further improve the sealing effect between the split shaft sleeve and the rotating shaft, the skeleton sealing ring is arranged at the other end of the split shaft sleeve away from the split cylinder, the skeleton sealing ring can be affected by high temperature after being away from the cylinder, the service life of the skeleton sealing ring is improved, and the external dust can be prevented from entering the split shaft sleeve to affect the rotating shaft, the lubricant can be injected into the oil injection hole through the oil nozzle, the split bearing can be lubricated, and the lubricant can be prevented from seeping out under the blocking action of the first graphite packing ring and the skeleton sealing ring, so that the dust can be prevented from entering the split bearing to damage the split bearing.
[0019] In the embodiment, the split cylinder 1 comprises an upper half cylinder 12 and a lower half cylinder 13, a connecting half hole 14 is formed on the left and right side walls of the upper half cylinder 12 and the lower half cylinder 13, a first connecting part 15 is outwardly arranged on the front and rear side walls of the upper half cylinder 12 and the lower half cylinder 13, the first connecting parts 15 of the upper half cylinder 12 and the lower half cylinder 13 are connected by bolts when the upper half cylinder 12 and the lower half cylinder 13 are closed, a first sealing groove is arranged between the top walls of the two first connecting parts 15 of the lower half cylinder 13 and the top walls of the left and right ends of the lower half cylinder 13, a second graphite packing 151 is clamped in the first sealing groove, the first connecting part 15 of the upper half cylinder 12 and the first connecting part 15 of the lower half cylinder 13 are sealingly closed when the upper half cylinder 12 and the lower half cylinder 13 are closed, the second graphite packing 151 seals the contact surface between the upper half cylinder 12 and the lower half cylinder 13, and air leakage and material leakage between the contact surfaces of the upper half cylinder 12 and the lower half cylinder 13 are prevented.
[0020] The split shaft sleeve 3 comprises an upper half sleeve 35 and a lower half sleeve 36, a second connecting part 37 is outwardly arranged on the front and rear side walls of the upper half sleeve 35 and the lower half sleeve 36, the second connecting parts 37 of the upper half sleeve 35 and the lower half sleeve 36 are connected by bolts when the upper half sleeve 35 and the lower half sleeve 36 are closed, a second sealing groove is arranged on the top wall of the lower half sleeve 36, a third graphite packing 361 is clamped in the second sealing groove, the third graphite packing 361 is located between the first graphite packing 11 and the bearing groove 31, and the bottom wall of the upper half sleeve 35 is sealingly closed with the third graphite packing 361 in the lower half sleeve 36 when the upper half sleeve 35 and the lower half sleeve 36 are closed.
[0021] The upper half sleeve 35 is clamped in the two connecting half holes 14 of the upper half cylinder 12, the axis of the upper half cylinder 12 coincides with the axis of the upper half sleeve 35, the second connecting part 37 on the upper half sleeve 35 abuts on the corresponding connecting half hole 14 to limit the position, and the upper half sleeve 35 is full-welded with the inner and outer walls of the corresponding connecting half hole 14, which improves the connection strength and the sealing property between the two, the lower half sleeve 36 is clamped in the two connecting half holes 14 of the lower half cylinder 13, the axis of the lower half cylinder 13 coincides with the axis of the lower half sleeve 36, the second connecting part 37 on the lower half sleeve 36 abuts on the corresponding connecting half hole 14 to limit the position, and the lower half sleeve 36 is full-welded with the inner and outer walls of the corresponding connecting half hole 14.
[0022] In the installation of the rotating shaft 2, the lower half cylinder 13 connected with the lower half circular sleeve 36 is first fixed, then the lower half of the split type bearing 4 is clamped into the bearing groove 31 of the lower half circular sleeve 36, two first graphite packing 11 are clamped in the lower half circular sleeve 36, then the two end necks of the rotating shaft 2 are clamped in the two lower half circular sleeves 36 respectively, the end neck of the rotating shaft 2 is in contact with the first graphite packing 11 in the corresponding side lower half circular sleeve 36 and the lower half of the split type bearing 4, the upper half of the split type bearing 4 is clamped on the end neck of the rotating shaft 2 and connected with the lower half of the split type bearing 4, so that the split type bearing 4 is fixed on the rotating shaft 2, then the upper half circular cylinder 12 connected with the upper half circular sleeve 35 is covered and fixed on the lower half circular cylinder 13, the upper half circular sleeve 35 is covered and fixed on the corresponding side lower half circular sleeve 36, the bearing groove 31 on the upper half circular sleeve 35 is clamped with the upper half of the split type bearing 4, two first graphite packing 11 are clamped into the upper half circular sleeve 35 and abut on the end neck of the rotating shaft 2, the two first graphite packing 11 are enclosed on the end neck of the rotating shaft 2 to play a sealing role, preventing the material in the split type cylinder 1 from penetrating into the split type bearing 3 to cause wear of the rotating shaft 2, resulting in air leakage and material leakage, the third graphite packing 361 can seal the contact surface between the abutted lower half circular sleeve 36 and the upper half circular sleeve 35, preventing air leakage and material leakage between the contact surface of the upper half circular sleeve 35 and the lower half circular sleeve 36, since the contact surface between the upper half circular sleeve 35 and the lower half circular sleeve 36 is sealed by the third graphite packing 361, and the contact surface between the upper half circular cylinder 12 and the lower half circular cylinder 13 is sealed by the second graphite packing 151, so that the overall sealing performance of the split type cylinder 1 and the split type bearing 3 can be ensured.
[0023] When the split type cylinder 1 and the split type bearing 3 are fixed, the skeleton sealing ring 32 is sleeved on the end neck of the rotating shaft 2 extending from the split type bearing 3, the skeleton sealing ring 32 is clamped into the corresponding side split type bearing 3, then the end cover 5 is connected to the split type bearing 3 by bolts, the end cover 5 can not only block the skeleton sealing ring 32 to fix the skeleton sealing ring 32 on the split type bearing 3, but also provide a certain supporting force to the split type bearing 3, thereby enhancing the overall rigidity and stability of the split type bearing 3, so that the split type bearing 3 can better withstand various loads in work.
[0024] When the rotating shaft 2 needs to be overhauled or replaced, the end cover 5 on the split type bearing 3 is only needed to be disassembled, then the split type cylinder 1 and the split type bearing 3 are disassembled to quickly take out the rotating shaft 2 for overhaul or replacement, thereby greatly improving the maintenance efficiency in later period.
[0025] It should be explained finally: the above examples are only used to illustrate the technical scheme of the utility model and not to limit it, although the utility model has been explained in detail with reference to the above examples, the ordinary skilled in the art should understand that: the specific implementation of the utility model can still be modified or replaced, and any modification or equivalent replacement without departing from the spirit and scope of the utility model should be covered in the protection scope of the claims of the utility model.
Claims
1. A sealing structure between a rotating shaft and a cylinder in a balling mill, characterized in that: The application relates to a split cylinder and a rotating shaft. The split cylinder comprises an upper half cylinder and a lower half cylinder, the split sleeve comprises an upper half sleeve and a lower half sleeve, the upper half sleeve is fully welded at the left and right ends of the upper half cylinder, the axis of the upper half cylinder is coincident with the axis of the upper half sleeve, the lower half sleeve is fully welded at the two ends of the lower half cylinder, the axis of the lower half cylinder is coincident with the axis of the lower half sleeve, first connecting parts are arranged on the front and back sidewalls of the upper half cylinder and the lower half cylinder and extend outward, the first connecting parts of the upper half cylinder and the lower half cylinder are connected through bolts when the upper half cylinder and the lower half cylinder are closed, second connecting parts are arranged on the front and back sidewalls of the upper half sleeve and the lower half sleeve and extend outward, and the second connecting parts of the upper half sleeve and the lower half sleeve are connected through bolts when the upper half sleeve and the lower half sleeve are closed.
2. The sealing structure between the transfer shaft and the cylinder of the balling machine according to claim 1, characterized in that: A first sealing groove is arranged between the top walls of the two first connecting parts of the lower half cylinder and the top walls of the left and right ends of the lower half cylinder, and a second graphite packing ring is clamped in the first sealing groove, the second graphite packing rings on the first connecting parts of the upper half cylinder and the lower half cylinder are sealed and combined when the upper half cylinder and the lower half cylinder are closed, a second sealing groove is arranged on the top wall of the lower half sleeve, and a third graphite packing ring is clamped in the second sealing groove, the third graphite packing ring is located between the first graphite packing ring and the bearing groove, and the bottom wall of the upper half sleeve is sealed and combined with the third graphite packing ring of the lower half sleeve when the upper half sleeve and the lower half sleeve are closed.
3. The sealing structure between the transfer shaft and the cylinder of the balling machine according to claim 2, characterized in that: Connecting half circular holes are arranged on the left and right sidewalls of the upper half cylinder and the lower half cylinder, the upper half sleeve is clamped in the connecting half circular hole of the upper half cylinder, the second connecting part of the upper half sleeve abuts against the connecting half circular hole of the upper half cylinder, the lower half sleeve is clamped in the connecting half circular hole of the lower half cylinder, and the second connecting part of the lower half sleeve abuts against the connecting half circular hole of the lower half cylinder.
4. The sealing structure between the transfer shaft and the cylinder of the balling machine according to claim 3, characterized in that: The upper half sleeve and the lower half sleeve are fully welded with the inner and outer walls of the corresponding connecting half circular holes.
5. The sealing structure between the transfer shaft and the barrel of the balling mill mixer according to claim 4, characterized in that: Two first graphite packing rings are arranged at the joint of the split sleeve and the split cylinder, and the joint ends of the two first graphite packing rings are staggered.
6. The sealing structure between the transfer shaft and the cylinder of the balling machine according to claim 4, characterized in that: