Flotation machine scraper shaft connecting structure and flotation machine

Abstract

The invention 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] The present application relates to the technical field of flotation equipment, and particularly relates to a connection structure of a scraper shaft of a flotation machine and a flotation machine. Background Art

[0002] A flotation machine is short for a flotation separator, referring to a mechanical device that completes the flotation process. In a flotation machine, after the pulp treated with chemicals is agitated and aerated, some of the mineral particles are selectively fixed on the bubbles; they float to the surface of the pulp and are scraped out to form a foam product, while the rest remains in the pulp to achieve the purpose of separating minerals. The scraper shaft of a flotation machine is an important component of the flotation machine. It is a slender cylinder, and the scraper is connected in the middle of the shaft. Since the shaft is long, it is supported and rotated in the bearing bush at multiple points. Due to long-term use, the scraper shaft is prone to wear, deformation, and fracture, which affects the flotation production process indicators. Therefore, when the scraper shaft of the flotation machine is worn or fractured, it needs to be repaired or replaced in time. The ore dressing plant of Fanshan Phosphate Co., Ltd. has two flotation series. In the first series, there are 12 roughing and scavenging flotation machines, and the scraper shaft is 29 meters long. There are 8 cleaning flotation machines, and the scraper shaft is 13.6 meters long. In the second series, there are 11 roughing and scavenging flotation machines, and the scraper shaft is 27 meters long. There are 8 cleaning flotation machines, and the scraper shaft is 13.6 meters long.

[0003] There are technical defects and deficiencies in the existing production: due to multiple bearing seats in the middle of the long scraper shaft, it is impossible to find the coaxiality. The open rubber bearings are used in the middle bearing seats, and the rubber bearings need to be lubricated with water. There are 14 rubber bearings that need to be lubricated with water in one series of flotation machines. The water consumption per hour for each water-adding bearing is 0.558 cubic meters, (0.558 cubic meters * 14 = 7.812 cubic meters / hour. Calculated according to 330 days, 330 * 7.812 * 24 = 61871.04 cubic meters). The annual water consumption for lubricating the bearing bushes of the scraper shaft in one series is 61871.04 cubic meters. During the use of the scraper shaft of the flotation machine in production, the scraper shaft often breaks. After breaking, the repair time by welding is about 2 hours, and the long repair time affects the flotation production index. Summary of the Invention

[0004] The present application is made in view of the above problems, and its purpose is to provide a connection structure of a scraper shaft of a flotation machine and a flotation machine. By installing a universal coupling on one side of the scraper shaft unit between every two bearing seat units and a fixed coupling on the other side, the problem of inability to find the coaxiality of multiple bearing seats is avoided, and the scraper shaft between every two bearing seat units can be disassembled, which is convenient for disassembly and assembly.

[0005] Specifically, the first aspect of the present application provides a connection structure for the scraper shaft of a flotation machine, including a scraper shaft unit and a bearing seat unit. First couplings are 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 seat unit through a second coupling.

[0006] Further, the scraper shaft unit includes a rotating shaft and a scraper. The scraper is installed on the rotating shaft, and both ends of the rotating shaft are connected to the first couplings.

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

[0008] Further, the bearing seat unit includes a bearing seat, a bearing, and a sealed bearing assembly. The bearing seat is used for installation on the frame of the flotation machine. Sealed bearing assemblies are arranged on both sides of the bearing for sealing the bearing.

[0009] Further, the sealed bearing assembly includes a skeleton oil seal, a sealing cover, and a sealing disc. The skeleton oil seals are arranged on both sides of the bearing and fixed by the sealing cover. At the same time, sealing discs are also arranged on both sides of the sealed bearing assembly.

[0010] Further, both sides of the bearing seat unit are connected to the second coupling through a rotating shaft.

[0011] Further, a power end bearing seat is provided at the first end of the connection structure for the scraper shaft of the flotation machine. The first end of the power end bearing seat is used for connecting the second coupling, and a connecting member is provided at the second end of the power end bearing seat. The connecting member is used for connecting a driving device.

[0012] Further, an end bearing seat is provided at the second end of the connection structure for the scraper shaft of the flotation machine. One end of the end bearing seat is connected to the second coupling.

[0013] Further, the connection structure for the scraper shaft of the flotation machine is provided with a plurality of scraper shaft units and a plurality of bearing seat units. The scraper shaft units and the bearing seat units are connected at intervals through couplings.

[0014] The second aspect of the present application provides a flotation machine including the connection structure for the scraper shaft of the flotation machine.

[0015] The present invention has the following beneficial effects: The connection structure of the scraper shaft of the flotation machine in the present invention effectively solves the problem of the inability to find coaxiality among multiple bearing seats by installing a universal coupling on one side of the scraper shaft unit between every two bearing seat units and a fixed coupling on the other side. At the same time, this design enables the scraper shaft between every two bearing seat units to be easily disassembled, greatly improving the disassembly and assembly efficiency. In addition, this connection structure also has the following advantages: First, it is structurally compact, occupies little space, and is convenient for layout inside the flotation machine; second, the connection is stable. Through the connection of the couplings, the stability of the scraper shaft during rotation is ensured, reducing wear and fracture caused by vibration; third, it is easy to maintain. When the scraper shaft or the bearing seat unit fails, it can be quickly disassembled and replaced, reducing the maintenance difficulty and time cost. The connection structure of the scraper shaft of the flotation machine can be widely applied to various types of flotation machines, which is of great significance for improving the production efficiency of the flotation machine and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following described drawings are only some embodiments of the present drawings. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic structural diagram of the end bearing seat; Figure 2 It is a schematic structural diagram of the bearing seat unit; Figure 3 It is a schematic structural diagram of the power end bearing seat; Figure 4 It is a schematic structural diagram of the scraper shaft unit; Figure 5 It is a schematic structural diagram of the connection structure of the scraper shaft of the flotation machine.

[0018] Explanation of the reference numerals in the drawings: 1. Scraper shaft unit; 2. Bearing seat unit; 3. First coupling; 4. Universal coupling; 5. Second coupling; 6. Rotating shaft; 7. Scraper; 8. Key; 9. Shaft retaining ring; 10. Bearing seat; 11. Bearing; 12. Skeleton oil seal; 13. Sealing cover; 14. Sealing disc; 15. Power end bearing seat; 16. End bearing seat; 17. Bolt; 18. Pulley.

[0019] The realization, functional features and advantages of the objectives of the present drawings will be further described in conjunction with the embodiments with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be described and explained below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without creative efforts belong to the scope of protection of the present application.

[0021] Obviously, the following description is only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar scenarios without creative efforts. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood that the content disclosed in the present application is insufficient.

[0022] See Figures 1 to 5 , an embodiment of the first aspect of the present application provides a connection structure for a flotation machine scraper shaft, including a scraper shaft unit 1 and a bearing seat unit 2. First couplings 3 are 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 seat unit 2 through a second coupling 5.

[0023] The above-mentioned scraper shaft unit 1 is installed on a rotating shaft 6. Both ends of the scraper shaft unit 1 are respectively connected to the first couplings 3 for connecting to the bearing seat unit 2 through the first couplings 3. In addition, in order to solve the problem that the coaxiality of the scraper 7 shaft length cannot be found, the present invention adopts the method of connecting the first coupling 3 at the first end of the scraper shaft unit 1 to the universal coupling 4, and second couplings 5 are respectively connected to both ends of the bearing seat unit 2, thus forming a structure in which both ends of the scraper shaft unit 1 are connected to the bearing seat unit 2.

[0024] This structural arrangement makes the connection between the scraper shaft unit 1 and the bearing housing unit 2 more flexible, capable of adapting to different coaxiality changes, effectively avoiding the wear and fracture of the scraper 7 shaft caused by coaxiality problems. At the same time, this design also makes the disassembly and assembly of the scraper shaft unit 1 more convenient, which can be completed only by disassembling the coupling, greatly improving the maintenance efficiency. In addition, due to the use of the universal coupling 4, the scraper 7 shaft can maintain a certain degree of flexibility during rotation, reducing the vibration and noise generated by rigid connection, and further extending the service life of the scraper 7 shaft. In summary, the scraper shaft connection structure of the flotation machine in this application not only solves the problems existing in the prior art, but also has the advantages of compact structure, stable connection, convenient maintenance, etc., and has broad application prospects.

[0025] In this embodiment, referring to Figure 4 , the scraper shaft unit 1 includes a rotating shaft 6 and a scraper 7. The scraper 7 is installed on the rotating shaft 6, and both ends of the rotating shaft 6 are connected to the first coupling 3. The scraper 7 is installed on the rotating shaft 6 through a connecting rod.

[0026] The scraper shaft unit 1 is connected between two bearing housing units 2 through the first couplings 3 at both ends of the rotating shaft 6. A universal joint coupling is installed on the rotating shaft 6 between every two bearing housing units 2 to facilitate the adjustment of non-concentricity. The scraper shaft unit 1 between every two bearing housing units 2 can be disassembled for more convenient maintenance. For the balance of the scraper 7, the scrapers 7 on the first rotating shaft 6 and the scrapers 7 on the second rotating shaft 6 are fixedly arranged at a 90° angle. The rough selection and scavenging scraper 7 of the present invention uses 7 bearing housing units 2, and the total length of 6 scraper shaft units 1 is 27 meters.

[0027] In this embodiment, referring to Figure 1 , the first coupling 3 is connected to the rotating shaft 6 through a key 8 and fixed by a shaft snap ring 9. This connection method ensures the stable connection between the first coupling 3 and the rotating shaft 6, and can maintain good stability and reliability even under high-speed rotation. The design of the key 8 connection is not only easy to assemble and disassemble, but also helps to transmit torque, enabling the rotating shaft 6 to work efficiently. At the same time, the use of the shaft snap ring 9 further enhances the firmness of the connection, preventing the coupling from loosening or falling off during rotation, thus ensuring the normal operation of the flotation machine.

[0028] 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 used to be installed on the frame of the flotation machine. Sealed bearing assemblies are arranged on both sides of the bearing 11 for sealing the bearing 11. The design of the sealed bearing assembly effectively prevents impurities such as dust and moisture from entering the interior of the bearing 11, ensuring the cleanliness and lubrication effect of the bearing 11, and thus extending the service life of the bearing 11. A shaft snap ring 9 is also provided at the connection between the bearing 11 and the rotating shaft 6.

[0029] 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 arranged on both sides of the bearing 11 and is fixed by the sealing covers 13 respectively. The sealing covers 13 on both sides are fixed by bolts 17. At the same time, sealing discs 14 are also arranged on both sides of the sealed bearing assembly. The sealing cover 13 is a through cover for convenient observation. The connection structure of the flotation machine scraper shaft in this application also takes into account the optimization of sealing performance and lubricity. Sealed bearing assemblies including a skeleton oil seal 12, a sealing cover 13 and a sealing disc 14 are arranged on both sides of the bearing 11 in the bearing housing unit 2. These components work together to effectively prevent impurities such as lubricants or pulp 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 the consumption of lubricants and lowers the operating cost. Since the humidity is high at the flotation scraper 7, the sealing of the bearing 11 is an important link. Two skeleton oil seals 12 and one sealing disc 14 are designed and installed on the gland of the bearing 11 in the middle bearing housing 10, so as to ensure that the bearing 11 can work in a high-humidity environment for a long time without pulp entering and avoid the failure of the bearing 11.

[0030] In this embodiment, both sides of the bearing housing unit 2 are connected to the second coupling 5 through a rotating shaft 6. Further, it is connected to the scraper shaft unit 1 through the second coupling 5. The spaced connection method between the scraper shaft unit 1 and the bearing housing unit 2 not only enables the scraper shaft unit 1 to flexibly adapt to different installation environments, but also facilitates the replacement or maintenance of a single scraper shaft unit 1 when needed, greatly improving the maintainability and flexibility of the flotation machine.

[0031] In this embodiment, refer to Figure 3 ., a power end bearing housing 15 is provided at the first end of the connection structure of the flotation machine scraper shaft. The first end of the power end bearing housing 15 is used to connect the second coupling 5, and a connecting member is provided at the second end of the power end bearing housing 15. The connecting member is used to connect the driving device. The connecting member is a pulley 18. The pulley 18 is connected to the rotating shaft 6 through a key 8. The pulley 18 is used to connect the driving device and thus drive the rotation of the flotation machine scraper 7 shaft.

[0032] In this embodiment, refer to Figure 1 ., an end bearing housing 16 is provided at the second end of the connection structure of the flotation machine scraper shaft. One end of the end bearing housing 16 is connected to the second coupling 5.

[0033] In this application, the bearings 11 in the power end bearing seat 15 and the end bearing seat 16 are selected as angular contact bearings 11. Angular contact bearings 11 have the following advantages: (1) Ability to withstand composite loads. It 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, and is suitable for working conditions with complex loads. (2) 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 subjected to force, so that the bearing 11 has high rigidity, which can ensure the rotation accuracy of the shaft, reduce deformation under load, and is conducive to improving the processing accuracy and stability of the equipment. (3) Easy installation. Angular contact bearings 11 are usually single-row or double-row structures, which are relatively simple to install. They can be selected and combined according to specific installation space and requirements, and the rigidity and rotation accuracy of the bearing 11 can be improved by appropriate preloading methods. (4) Long service life. Under reasonable selection, installation and use conditions, angular contact bearings 11 have a long service life. Its good load-bearing capacity and wear resistance can withstand large loads and frequent load changes, and it is not prone to failure forms such as fatigue wear and plastic deformation.

[0034] In addition, in another preferred embodiment, the present application installs a shutdown alarm device at the end bearing seat 16, and the alarm device is connected to the automatic control system. The abnormal shutdown alarm device of the scraper 7 machine will be activated to remind the operator to check and repair.

[0035] In this embodiment, see Figure 5 The flotation machine scraper shaft connection structure is provided with a plurality of scraper shaft units 1 and a plurality of bearing seat units 2, and the scraper shaft units 1 and the bearing seat units 2 are connected at intervals by couplings. The number of scraper shaft units 1 and the bearing seat units 2 is set according to actual production requirements. The scraper shaft units 1 and the bearing seat units 2 are connected at intervals by couplings, making the entire flotation machine scraper shaft connection structure more modular and convenient for assembly and disassembly. Each scraper shaft unit 1 and the bearing seat unit 2 can be independently inspected, maintained and replaced, which greatly reduces the difficulty and time cost of maintenance.

[0036] In this application, the bearing 11 in the intermediate bearing housing unit 2 is a spherical roller bearing 11. The advantages of the spherical roller bearing 11 are as follows: (1) Good self-aligning performance, which can automatically adapt to the deflection and misalignment of the shaft, allowing a certain angular deviation between the inner and outer ring axes, generally up to 1.5° - 3°. It can compensate for the axis non-coincidence problems caused by installation errors, shaft deformation, etc., ensure the normal operation of the bearing 11, and extend its service life. (2) High load-carrying capacity. It has two rows of symmetrical spherical rollers with a large contact area with the raceway, can withstand large radial loads and a certain axial load, and is suitable for heavy-duty and high-impact load occasions. (3) Smooth operation. The contact between the rollers and the raceway is a line contact, the contact stress distribution is uniform, and the number of rolling elements is relatively large. During operation, the vibration and noise are small, which can provide a smooth operating state and is conducive to improving the working accuracy and reliability of the equipment. (4) Simple lubrication and maintenance. Usually, grease lubrication or oil lubrication is adopted, and the lubrication method is simple and easy to implement.

[0037] The bearing housing 10 of this application selects the national standard 2131 bearing housing 10. The advantages of the national standard 2131 bearing housing 10 are as follows: (1) Support and protect the bearing 11. The bearing housing 10 provides a stable support structure for the bearing 11 and protects the bearing 11 from external impacts and contamination. (2) Facilitate installation and maintenance. The bearing housing 10 is usually designed to be detachable, which is convenient for the installation, disassembly, and maintenance of the bearing 11. (3) Extend the service life of the bearing 11. By reducing vibration and friction, the bearing housing 10 helps to extend the service life of the bearing 11. (4) Good sealing performance. The gland of the bearing housing 10 is equipped with a sealing device, which can prevent pollutants such as dust and moisture from entering the inside of the bearing 11. (5) Strong load-carrying capacity. The bearing housing 10 is usually made of cast steel material and can withstand large loads.

[0038] The second aspect of this application provides a flotation machine, including the above-mentioned flotation machine scraper shaft connection structure.

[0039] By using the above-mentioned flotation machine scraper shaft connection structure, the operation efficiency and reliability of this flotation machine are significantly improved. In practical applications, the driving device of the flotation machine transmits power through the connecting piece (such as the pulley 18) of the power end bearing housing 15, driving the entire scraper 7 shaft connection structure to rotate. Driven by the rotating shaft 6, the scraper shaft unit 1 scrapes and stirs the pulp in the flotation machine through the scraper 7, realizing the effective separation of minerals.

[0040] Due to the combined connection method of the universal coupling 4 and the fixed coupling, the flotation machine scraper shaft connection structure can well adapt to different shaft misalignment changes, avoiding the wear and fracture of the scraper 7 shaft caused by coaxiality problems. At the same time, this design makes the disassembly and assembly of the scraper shaft unit 1 more convenient, greatly improving the maintenance efficiency.

[0041] In addition, this flotation machine also has the advantages of a compact structure, stable connection, and convenient maintenance. Its compact structure design makes the internal layout of the flotation machine more reasonable, occupying less space; the stable connection structure ensures the stability of the 7-axis of the scraper during rotation, reducing vibration and noise; the convenient maintenance design reduces the maintenance difficulty and time cost, improving the overall operation efficiency of the flotation machine.

[0042] In summary, the flotation machine and its 7-axis connection structure of the scraper of this application have broad application prospects in the technical field of flotation equipment, and are of great significance for improving the production efficiency of the flotation machine and reducing the maintenance cost.

[0043] It should be noted that this application is not limited to the above embodiments. The above embodiments are only examples, and embodiments with the same structure and the same effect as the technical idea within the technical solution scope of this application are included in the technical scope of this application. In addition, within the scope of not departing from the main idea of this application, various deformations that can be thought of by those skilled in the art are applied to the embodiments, and other ways constructed by combining some constituent elements in the embodiments are also included in the scope of this application.

Claims

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

2. The scraping plate shaft connection structure of the flotation machine 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 installed on the rotating shaft (6), and both ends of the rotating shaft (6) are connected with the first coupling (3).

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

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

5. The scraping plate shaft connection structure of the flotation machine 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 arranged on both sides of the bearing (11) and fixed by the sealing cover (13). At the same time, sealing discs (14) are also arranged on both sides of the sealed bearing assembly.

6. The scraping shaft connection structure of the flotation machine according to claim 4, characterized in that, Both sides of the bearing seat unit (2) are connected with the second coupling (5) through the rotating shaft (6).

7. The scraping plate shaft connection structure of the flotation machine 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 for connecting the second coupling (5), and the second end of the power end bearing seat (15) is provided with a connecting piece for connecting a driving device.

8. The scraper shaft connection structure of the flotation machine 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 with the second coupling (5).

9. The scraping shaft connection structure of the flotation machine according to claim 1, wherein The flotation machine scraper shaft connection structure is provided with a plurality of scraper shaft units (1) and a plurality of bearing seat units (2). The scraper shaft units (1) and the bearing seat units (2) are connected at intervals through couplings.

10. A flotation machine, characterized in that, It includes the flotation machine scraper shaft connection structure according to any one of claims 1 - 9.

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