Flotation machine scraper shaft connecting structure and flotation machine

Abstract

The utility model provides a flotation machine scraper shaft connecting structure and a flotation machine, the flotation machine scraper shaft connecting structure comprises a scraper shaft unit and a bearing seat unit, the first end and the second end of the scraper shaft unit are each connected with a first coupler, and the first coupler at the first end of the scraper shaft unit is connected with a universal coupler; and the universal coupling and the first coupling at the second end of the scraper shaft unit are connected with the bearing seat unit through the second coupling. The universal coupling is additionally arranged on one side of the scraper shaft unit between every two bearing seat units, and the fixed coupling is additionally arranged on the other side of the scraper shaft unit between every two bearing seat units, so that the problem that the coaxiality of a plurality of bearing seats cannot be found is effectively solved; meanwhile, due to the design, the scraper shaft between every two bearing seat units can be easily disassembled, and the disassembling and assembling efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of flotation equipment technology, and in particular to a flotation machine scraper shaft connection structure and a flotation machine. Background Technology

[0002] A flotation machine, short for flotation mineral processing machine, refers to the mechanical equipment that completes the flotation process. In a flotation machine, the slurry, after being treated with reagents, is agitated and aerated, causing certain mineral particles to selectively adhere to the air bubbles; those that float to the surface are scraped off to form a frothy product, while the rest remain in the slurry, thus achieving mineral separation. The scraper shaft of the flotation machine is an important component; it is a slender cylinder with a scraper connected in the middle. Due to its length, the shaft is supported and rotated at multiple points within the bearing bush. Over long-term use, the scraper shaft is prone to wear, deformation, and breakage, affecting the flotation process parameters. Therefore, scraper shafts that are worn or broken must be repaired or replaced promptly. The Fanshan Phosphate Mine Co., Ltd. concentrator has two flotation series: a series of roughing and scavenging flotation machines with 12 units and a scraper shaft length of 29 meters; and a series of cleaning flotation machines with a scraper shaft length of 13.6 meters. The second series of roughing and scavenging flotation machines consist of 11 flotation machines with a scraper shaft length of 27 meters, and the cleaning flotation machines consist of 8 flotation machines with a scraper shaft length of 13.6 meters.

[0003] The existing production process has technical defects and shortcomings: Due to the multiple bearing seats in the middle of the scraper conveyor shaft, it is impossible to achieve coaxiality. The middle bearing seats use open rubber bearings, which require water lubrication. A series of flotation machines has 14 water lubrication points for the rubber bearings, with each bearing requiring 0.558 cubic meters of water per hour (0.558 cubic meters * 14 = 7.812 cubic meters / hour, calculated over 330 days: 330 * 7.812 * 24 = 61871.04 cubic meters). The annual water consumption for lubrication of the scraper bearings in a series of scraper conveyors is 61871.04 cubic meters. During production, the scraper shaft of the flotation machine frequently breaks. Repairing the broken shaft by welding takes approximately 2 hours, which negatively impacts flotation production indicators. Utility Model Content

[0004] This application is made in view of the above-mentioned problems, and its purpose is to provide a flotation machine scraper shaft connection structure and a flotation machine. By adding a universal coupling to one side of the scraper shaft unit between every two bearing housing units and a fixed coupling to the other side, the problem of multiple bearing housings being unable to find coaxiality is avoided, and the scraper shaft between every two bearing housing units can be disassembled, making disassembly and assembly convenient.

[0005] Specifically, the first aspect of this application provides a flotation machine scraper shaft connection structure, including a scraper shaft unit and a bearing housing unit. A first coupling is connected to both the first end and the second end of the scraper shaft unit. The first coupling at the first end of the scraper shaft unit is connected to a universal coupling. The universal coupling and the first coupling at the second end of the scraper shaft unit are connected to the bearing housing unit through a second coupling.

[0006] Furthermore, the scraper shaft unit includes a rotating shaft and a scraper, the scraper being mounted on the rotating shaft, and both ends of the rotating shaft being connected to a first coupling.

[0007] Furthermore, the first coupling is connected to the shaft by a key and fixed by a shaft retaining ring.

[0008] Furthermore, the bearing housing unit includes a bearing housing, a bearing, and a sealed bearing assembly. The bearing housing is used to be installed on the frame of the flotation machine, and the sealed bearing assembly is provided on both sides of the bearing for sealing the bearing.

[0009] Furthermore, the sealed bearing assembly includes a skeleton oil seal, a sealing cover, and a sealing disc. The skeleton oil seal is disposed on both sides of the bearing and is fixed by the sealing cover. Sealing discs are also disposed on both sides of the sealed bearing assembly.

[0010] Furthermore, the bearing housing unit is connected to the second coupling on both sides via rotating shafts.

[0011] Furthermore, the first end of the flotation machine scraper shaft connection structure is provided with a power end bearing seat, the first end of which is used to connect to a second coupling, and the second end of which is provided with a connecting member, which is used to connect to a drive device.

[0012] Furthermore, the second end of the flotation machine scraper shaft connection structure is provided with an end bearing seat, and one end of the end bearing seat is connected to a second coupling.

[0013] Furthermore, the flotation machine scraper shaft connection structure is provided with several scraper shaft units and several bearing seat units, and the scraper shaft units and bearing seat units are connected at intervals by couplings.

[0014] A second aspect of this application provides a flotation machine, including the aforementioned flotation machine scraper shaft connection structure.

[0015] This utility model has the following beneficial effects:

[0016] This utility model's scraper shaft connection structure for flotation machines effectively solves the problem of misalignment among multiple bearing housings by adding a universal coupling to one side of the scraper shaft unit between every two bearing housing units and a fixed coupling to the other side. Simultaneously, this design allows for easy disassembly of the scraper shaft between every two bearing housing units, significantly improving assembly and disassembly efficiency. Furthermore, this connection structure offers the following advantages: firstly, it is compact, occupying little space and facilitating layout within the flotation machine; secondly, it provides stable connection, ensuring the stability of the scraper shaft during rotation and reducing wear and breakage caused by vibration; and thirdly, it facilitates maintenance, allowing for quick disassembly and replacement when the scraper shaft or bearing housing unit malfunctions, reducing maintenance difficulty and time costs. This scraper shaft connection structure for flotation machines can be widely applied in various types of flotation machines, playing a significant role in improving flotation machine production efficiency and reducing maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the end bearing housing structure;

[0019] Figure 2 This is a schematic diagram of the bearing housing unit structure;

[0020] Figure 3 This is a schematic diagram of the power end bearing housing structure;

[0021] Figure 4 This is a schematic diagram of the scraper shaft unit structure;

[0022] Figure 5 This is a schematic diagram of the scraper shaft connection structure of a flotation machine.

[0023] Explanation of reference numerals: 1. Scraper shaft unit; 2. Bearing housing unit; 3. First coupling; 4. Universal coupling; 5. Second coupling; 6. Rotating shaft; 7. Scraper; 8. Key; 9. Shaft snap ring; 10. Bearing housing; 11. Bearing; 12. Oil seal; 13. Sealing cover; 14. Sealing disc; 15. Power end bearing housing; 16. End bearing housing; 17. Bolt; 18. Pulley.

[0024] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0026] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0027] See Figures 1 to 5 An embodiment of the first aspect of this application provides a flotation machine scraper shaft connection structure, including a scraper shaft unit 1 and a bearing housing unit 2. A first coupling 3 is connected to both the first end and the second end of the scraper shaft unit 1. The first coupling 3 at the first end of the scraper shaft unit 1 is connected to a universal coupling 4. The universal coupling 4 and the first coupling 3 at the second end of the scraper shaft unit 1 are connected to the bearing housing unit 2 through a second coupling 5.

[0028] The scraper shaft unit 1 described above is mounted on the rotating shaft 6. Both ends of the scraper shaft unit 1 are connected to the first coupling 3, which is used to connect to the bearing housing unit 2 through the first coupling 3. In addition, in order to solve the problem of the scraper shaft 7 not being coaxial, this utility model adopts a method in which the first coupling 3 at the first end of the scraper shaft unit 1 is connected to the universal coupling 4, and the two ends of the bearing housing unit 2 are respectively connected to the second coupling 5, thus forming a structure in which both ends of the scraper shaft unit 1 are connected to the bearing housing unit 2.

[0029] This structural design allows for a more flexible connection between the scraper shaft unit 1 and the bearing housing unit 2, adapting to different axiality variations and effectively preventing wear and breakage of the scraper shaft 7 due to coaxiality issues. Simultaneously, this design makes disassembly and assembly of the scraper shaft unit 1 easier, requiring only the removal of the coupling, significantly improving maintenance efficiency. Furthermore, the use of the universal coupling 4 ensures that the scraper shaft 7 maintains a certain degree of flexibility during rotation, reducing vibration and noise caused by rigid connections and further extending the service life of the scraper shaft 7. In summary, the flotation machine scraper shaft connection structure of this application not only solves the problems existing in the prior art but also possesses advantages such as compact structure, stable connection, and convenient maintenance, showing broad application prospects.

[0030] In this embodiment, see Figure 4 The scraper shaft unit 1 includes a rotating shaft 6 and a scraper 7. The scraper 7 is mounted on the rotating shaft 6, and both ends of the rotating shaft 6 are connected to the first coupling 3. The scraper 7 is mounted on the rotating shaft 6 via a connecting rod.

[0031] The scraper shaft unit 1 is connected to the two bearing housing units 2 via the first coupling 3 at both ends of the rotating shaft 6. A universal joint coupling is installed between each pair of bearing housing units 2 on the rotating shaft 6 to facilitate adjustment of misalignment. The scraper shaft unit 1 between each pair of bearing housing units 2 can be disassembled for easier maintenance. To ensure the balance of the scraper 7, the scraper 7 on the first rotating shaft 6 and the scraper 7 on the second rotating shaft 6 are fixedly arranged at a 90° angle. The coarse and sweep scraper 7 of this utility model uses 7 bearing housing units 2 and 6 scraper shaft units 1 with a total length of 27 meters.

[0032] In this embodiment, see Figure 1 The first coupling 3 is connected to the rotating shaft 6 via a key 8 and secured by a shaft retainer 9. This connection method ensures a robust connection between the first coupling 3 and the rotating shaft 6, maintaining good stability and reliability even at high speeds. The key 8 connection design not only facilitates assembly and disassembly but also helps transmit torque, enabling the rotating shaft 6 to operate efficiently. Simultaneously, the use of the shaft retainer 9 further enhances the connection's strength, preventing the coupling from loosening or falling off during rotation, thus ensuring the normal operation of the flotation machine.

[0033] In this embodiment, the bearing housing unit 2 includes a bearing housing 10, a bearing 11, and a sealed bearing assembly. The bearing housing 10 is mounted on the frame of the flotation machine. Sealed bearing assemblies are provided on both sides of the bearing 11 to seal it. The design of the sealed bearing assembly effectively prevents dust, moisture, and other impurities from entering the bearing 11, ensuring the cleanliness and lubrication of the bearing 11, thereby extending its service life. A shaft retaining ring 9 is also provided at the connection between the bearing 11 and the rotating shaft 6.

[0034] In this embodiment, the sealed bearing assembly includes a skeleton oil seal 12, a sealing cover 13, and a sealing disc 14. The skeleton oil seal 12 is disposed on both sides of the bearing 11 and is fixed by the sealing cover 13. The sealing covers 13 on both sides are fixed by bolts 17. Sealing discs 14 are also disposed on both sides of the sealed bearing assembly. The sealing cover 13 is a transparent cover for easy observation. The flotation machine scraper shaft connection structure of this application also considers the optimization of sealing and lubrication. Sealed bearing assemblies, including the skeleton oil seal 12, sealing cover 13, and sealing disc 14, are disposed on both sides of the bearing 11 within the bearing housing unit 2. These components work together to effectively prevent impurities such as lubricant or slurry from entering the interior of the bearing 11, ensuring the long-term stable operation of the bearing 11. At the same time, this sealing design also reduces lubricant consumption and lowers operating costs. Because of the high humidity at the flotation scraper 7 machine, the sealing of bearing 11 is a crucial component. The intermediate bearing housing 10 and bearing 11 cover are designed to install two skeleton oil seals 12 and one sealing disc 14. This ensures that bearing 11 can operate in a high-humidity environment for a long time without slurry entering and avoid bearing 11 failure.

[0035] In this embodiment, the bearing housing unit 2 is connected to the second coupling 5 on both sides via a rotating shaft 6. It is then connected to the scraper shaft unit 1 via the second coupling 5. This intermittent connection between the scraper shaft unit 1 and the bearing housing unit 2 not only allows the scraper shaft unit 1 to flexibly adapt to different installation environments but also facilitates the replacement or repair of individual scraper shaft units 1 when needed, greatly improving the maintainability and flexibility of the flotation machine.

[0036] In this embodiment, see Figure 3 The first end of the flotation machine scraper shaft connection structure is provided with a power end bearing seat 15, which is used to connect a second coupling 5. The second end of the power end bearing seat 15 is provided with a connecting member, which is used to connect a drive device. The connecting member is a pulley 18, which is connected to the rotating shaft 6 via a key 8. The pulley 18 is used to connect to the drive device, thereby driving the flotation machine scraper 7 shaft to rotate.

[0037] In this embodiment, see Figure 1 The second end of the flotation machine scraper shaft connection structure is provided with an end bearing seat 16, and one end of the end bearing seat 16 is connected to the second coupling 5.

[0038] In this application, the bearings 11 in the power end bearing housing 15 and the end bearing housing 16 are selected as angular contact bearings 11. Angular contact bearings 11 have the following advantages: (1) They can withstand combined loads. They can withstand radial loads and axial loads at the same time, and can optimize the ability to withstand radial and axial loads by adjusting the contact angle of the bearing 11 according to different application requirements. They are suitable for complex load conditions. (2) They have good rigidity. The contact point or line between the raceway and the rolling element of the angular contact bearing 11 can form a good support structure when under force, so that the bearing 11 has high rigidity, which can ensure the rotation accuracy of the shaft, reduce deformation under load, and help improve the processing accuracy and stability of the equipment. (3) They are easy to install. Angular contact bearings 11 are usually single-row or double-row structures. They are relatively simple to install. They can be selected and combined according to the specific installation space and requirements. The rigidity and rotation accuracy of the bearing 11 can be improved by appropriate pre-tightening methods. (4) They have a long service life. Under reasonable selection, installation and use conditions, angular contact bearings 11 have a long service life. Its excellent load-bearing capacity and wear resistance enable it to withstand large loads and frequent load changes, and it is not prone to failure modes such as fatigue wear and plastic deformation.

[0039] In another preferred embodiment, this application installs a shutdown alarm device at the end bearing housing 16. The alarm device is connected to the automatic control system. When the scraper machine 7 experiences an abnormal shutdown alarm, the alarm device will be activated to remind the operator to check and repair it.

[0040] In this embodiment, see Figure 5 The flotation machine scraper shaft connection structure includes several scraper shaft units 1 and several bearing seat units 2, which are connected at intervals via couplings. The number of scraper shaft units 1 and bearing seat units 2 is set according to actual production needs. The method of connecting the scraper shaft units 1 and bearing seat units 2 at intervals via couplings makes the entire flotation machine scraper shaft connection structure more modular, facilitating assembly and disassembly. Each scraper shaft unit 1 and bearing seat unit 2 can be inspected, maintained, and replaced independently, greatly reducing maintenance difficulty and time costs.

[0041] In this application, the bearing 11 in the intermediate bearing housing unit 2 is a self-aligning roller bearing 11. The advantages of the self-aligning roller bearing 11 are: (1) Good self-aligning performance: It can automatically adapt to the deflection and misalignment of the shaft, and allow the inner and outer ring axes to have a certain misalignment angle, which can generally reach 1.5°-3°. It can compensate for the misalignment of the axes caused by installation errors, shaft deformation, etc., and ensure the normal operation of the bearing 11 and extend its service life. (2) High load-bearing capacity: It has two rows of symmetrical spherical rollers with a large contact area with the raceway. It can withstand a large radial load and a certain axial load, and is suitable for heavy load and impact load occasions. (3) Smooth operation: The rollers and raceways are in line contact, the contact stress is evenly distributed, and there are a large number of rolling elements. The vibration and noise are small during operation, which can provide a smooth running state and is conducive to improving the working accuracy and reliability of the equipment. (4) Simple lubrication and maintenance: Grease lubrication or oil lubrication is usually used, and the lubrication method is simple and easy to implement.

[0042] The bearing housing 10 of this application is selected from the national standard 2131 bearing housing 10. The advantages of the national standard 2131 bearing housing 10 are: (1) Support and protection of bearing 11. The bearing housing 10 provides a stable support structure for bearing 11 and protects bearing 11 from external impact and contamination. (2) Easy to install and maintain. The bearing housing 10 is usually designed to be detachable, which facilitates the installation, disassembly and maintenance of bearing 11. (3) Improve the service life of bearing 11. By reducing vibration and friction, the bearing housing 10 helps to extend the service life of bearing 11. (4) Good sealing performance. The bearing housing 10 gland is equipped with a sealing device to prevent dust, moisture and other contaminants from entering the interior of bearing 11. (5) Strong load-bearing capacity. The bearing housing 10 is usually made of cast steel material and can withstand large loads.

[0043] A second aspect of this application provides a flotation machine, including the aforementioned flotation machine scraper shaft connection structure.

[0044] This flotation machine significantly improves its operating efficiency and reliability by using the aforementioned scraper shaft connection structure. In practical applications, the flotation machine's drive unit transmits power through the connecting parts (such as pulley 18) of the power end bearing seat 15, driving the entire scraper 7 shaft connection structure to rotate. Driven by the rotating shaft 6, the scraper shaft unit 1 scrapes and agitates the slurry inside the flotation machine through the scraper 7, achieving effective mineral separation.

[0045] Thanks to the combination of universal coupling 4 and fixed coupling, the scraper shaft connection structure of this flotation machine can adapt well to different shaft misalignment changes, avoiding wear and breakage of the scraper shaft 7 due to coaxiality issues. At the same time, this design makes disassembly and assembly of the scraper shaft unit 1 more convenient, greatly improving maintenance efficiency.

[0046] In addition, this flotation machine has advantages such as compact structure, stable connection, and convenient maintenance. Its compact structural design makes the internal layout of the flotation machine more reasonable and occupies less space; the stable connection structure ensures the stability of the scraper shaft 7 during rotation, reducing vibration and noise; and the convenient maintenance design reduces maintenance difficulty and time costs, improving the overall operating efficiency of the flotation machine.

[0047] In summary, the flotation machine and its 7-axis scraper connection structure of this application have broad application prospects in the field of flotation equipment technology, and are of great significance for improving the production efficiency of flotation machines and reducing maintenance costs.

[0048] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A connection structure of a scraper shaft of a flotation machine, characterized in that, It includes a scraper shaft unit (1) and a bearing housing unit (2). The first end and the second end of the scraper shaft unit (1) are both connected to a first coupling (3). The first coupling (3) at the first end of the scraper shaft unit (1) is connected to a universal coupling (4). The universal coupling (4) and the first coupling (3) at the second end of the scraper shaft unit (1) are connected to the bearing housing unit (2) through a second coupling (5).

2. The flotation machine scraper shaft connection structure according to claim 1, characterized in that, The scraper shaft unit (1) includes a rotating shaft (6) and a scraper (7). The scraper (7) is mounted on the rotating shaft (6), and both ends of the rotating shaft (6) are connected to the first coupling (3).

3. The flotation machine scraper shaft connection structure according to claim 2, characterized in that, The first coupling (3) is connected to the rotating shaft (6) by a key (8) and fixed by a shaft retaining ring (9).

4. The flotation machine scraper shaft connection structure according to claim 1, characterized in that, The bearing housing unit (2) includes a bearing housing (10), a bearing (11), and a sealed bearing assembly. The bearing housing (10) is used to be installed on the frame of the flotation machine. The bearing (11) is provided with sealed bearing assemblies on both sides for sealing the bearing (11).

5. The flotation machine scraper shaft connection structure according to claim 4, characterized in that, The sealed bearing assembly includes a skeleton oil seal (12), a sealing cover (13) and a sealing disc (14). The skeleton oil seal (12) is located on both sides of the bearing (11) and is fixed by the sealing cover (13). At the same time, a sealing disc (14) is also provided on both sides of the sealed bearing assembly.

6. The flotation machine scraper shaft connection structure according to claim 4, characterized in that, The bearing housing unit (2) is connected to the second coupling (5) on both sides via a rotating shaft (6).

7. The flotation machine scraper shaft connection structure according to claim 1, characterized in that, The first end of the flotation machine scraper shaft connection structure is provided with a power end bearing seat (15), the first end of the power end bearing seat (15) is used to connect the second coupling (5), and the second end of the power end bearing seat (15) is provided with a connector, which is used to connect the drive device.

8. The flotation machine scraper shaft connection structure according to claim 1, characterized in that, The second end of the flotation machine scraper shaft connection structure is provided with an end bearing seat (16), and one end of the end bearing seat (16) is connected to a second coupling (5).

9. The flotation machine scraper shaft connection structure according to claim 1, characterized in that, The flotation machine scraper shaft connection structure is provided with several scraper shaft units (1) and several bearing seat units (2), and the scraper shaft units (1) and bearing seat units (2) are connected at intervals by couplings.

10. A flotation machine, characterized in that, Includes the flotation machine scraper shaft connection structure as described in any one of claims 1-9.

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