Flotation machine supporting shaft system and flotation machine having the shaft system

Abstract

The invention discloses a flotation machine supporting shaft system and a flotation machine with the shaft system, comprising an upper bearing component, a lower bearing component, an upper shaft, a lubrication system, a round nut, an upper bearing gland, an oil retaining ring, a bearing body, a bearing sleeve, a lower bearing gland, and a dust ring; the upper bearing component comprises an upper bearing 1, an upper bearing 2, and an upper oil slinging plate; the lower bearing component comprises a positioning ring, a lower bearing, and a lower oil slinging plate; the upper shaft comprises a step shaft, a flange, a key, a shaft end retaining ring, and a shaft end retaining ring connecting piece; the lubrication system comprises an upper bearing lubrication device A, an upper bearing lubrication device B, an upper bearing waste oil recovery device, a lower bearing lubrication device, and a lower bearing waste oil recovery device; the step shaft is installed in the bearing body and is coaxial with the bearing body; the upper bearing assembly is installed into the upper part of the upper shaft from the upper end of the upper shaft, and the lower bearing assembly is installed into the lower part of the upper shaft from the upper end or the lower end of the upper shaft. It can be disassembled on both sides, has stable performance, is convenient for maintenance, and workers can choose different ways to disassemble and assemble.

Description

Technical Field

[0001] The invention relates to a flotation device for nonferrous metals, ferrous metals and rare precious metals, in particular to a flotation machine supporting shaft system and a flotation machine having the shaft system. Background Art

[0002] Flotation is widely used in the recovery of non-ferrous metals, ferrous metals and rare precious metals, and the flotation machine is the main equipment to achieve this process. With the continuous expansion of the scale of the ore dressing plant and the dilution of the ore, higher requirements are also put forward for the large-scale flotation equipment. The aerated mechanical agitation flotation machine is the main model of large-scale flotation machine. At present, the specifications of the aerated mechanical agitation flotation machine used in industrial applications have reached 680 cubic meters.

[0003] During the operation of the flotation machine, the shaft system is always running at full load. If an abnormality occurs, the flotation machine must be shut down for maintenance, and the economic loss caused by the shutdown is significant. Therefore, reliability and stability are important indicators for evaluating the quality of the flotation machine.

[0004] The shaft structure, bearing configuration and main shaft structure of large or extra-large flotation machines are mostly based on the structural design of small flotation machines. Figure 1 As shown in the figure, a main feature of the existing shaft system structure is that the bearing configuration adopts self-aligning spherical roller bearings mounted on bushings, and the main shaft adopts an inverted tapered shaft structure as shown in Figure 2 As shown in the figure, high bearing temperature and main shaft failure in the shaft system rarely occur in small and medium-sized flotation machines, but they occur frequently in large and extra-large flotation machines. The existing shaft system design can no longer meet the operating requirements of large and extra-large flotation machines.

[0005] Disadvantages of existing technology:

[0006] (1) The bearings currently used in the shaft system are self-aligning spherical roller bearings mounted on tapered sleeves. These bearings have strong radial load-bearing capacity and can also withstand certain axial loads. They are mainly used in mechanisms with large radial loads. However, when these bearings are used in large or extra-large flotation machines, the upper bearing mainly bears the axial force and the radial force it bears is very small, so the bearing's load-bearing capacity is greatly reduced.

[0007] (2) For externally inflated flotation machines, after the equipment is enlarged, the main shaft diameter and bearing size of the flotation machine also become larger. The bearings selected for the shaft system are self-aligning spherical roller bearings on tapered sleeves. The locking force between the bearing and the shaft is completely determined by the locking condition of the locking nut during assembly. There is a lot of uncertainty and it is not as easy to control as small equipment. Due to insufficient locking force, the bearing and the main shaft loosen, and the main shaft will sink as a whole, which not only causes the support positioning to change, but also the bearing cannot work normally and is damaged.

[0008] (3) After the shaft system is assembled, the lower bearing is invisible and looks more like a black box, making it difficult to observe and determine the actual condition of the bearing. As the bearing body size increases and the distance between the two bearings increases, the coaxiality requirement cannot be reduced.

[0009] (4) The shaft structure of the existing large-scale flotation machine is an inverted cone structure, and the main shaft can only be disassembled from one side, which is very inconvenient. In particular, as the flotation machine is enlarged, the volume of each component is getting larger and larger, and the difficulty and cost of disassembly and assembly are also increasing.

[0010] (5) It cannot be tightened online. During daily maintenance, the entire system must be disassembled, which results in high maintenance costs and seriously affects the customer experience.

[0011] (6) In the existing shaft system, there is no grease recovery circuit in the bearing lubrication cavity. Excessive grease will flow to the lower bearing, increasing the friction and wear inside the lower bearing, and eventually causing the bearing to burn and stick, shortening its service life, increasing the equipment failure rate, and affecting production operations. Summary of the invention

[0012] The object of the present invention is to provide a flotation machine supporting shaft system and a flotation machine having the shaft system.

[0013] The objective of the present invention is achieved through the following technical solutions:

[0014] The flotation machine supporting shaft system and the flotation machine having the shaft system of the present invention include an upper bearing component, a lower bearing component, an upper shaft, a lubrication system, a round nut, an upper bearing gland, an oil retaining ring, a bearing body, a bearing sleeve, a lower bearing gland, and a dust ring;

[0015] The upper bearing component comprises an upper bearing 1, an upper bearing 2, and an upper oil-slinging pan;

[0016] The lower bearing component includes a positioning ring, a lower bearing, and a lower oil slinger pan;

[0017] The upper shaft includes a stepped shaft, a flange, a key, a shaft end retaining ring, and a shaft end retaining ring connecting piece;

[0018] The lubrication system comprises an upper bearing lubrication device A, an upper bearing lubrication device B, an upper bearing waste oil recovery device, a lower bearing lubrication device, and a lower bearing waste oil recovery device;

[0019] The step shaft is installed in the bearing body and is coaxial with the bearing body;

[0020] The upper bearing assembly is installed into the upper part of the upper shaft from the upper end of the upper shaft, and the lower bearing assembly is installed into the lower part of the upper shaft from the upper end or the lower end of the upper shaft.

[0021] It can be seen from the technical solution provided by the present invention that the flotation machine support shaft system and the flotation machine having the shaft system provided by the embodiment of the present invention can be disassembled on both sides, has stable performance, is convenient for maintenance, and workers can choose different ways to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the shaft system structure in the prior art.

[0023] Figure 2 It is a schematic diagram of the inverted cone shaft structure in the prior art.

[0024] Figure 3 Schematic diagram of the shaft system structure in an embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the main shaft and bearing structure in an embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the upper bearing structure in an embodiment of the present invention.

[0027] Figure 6 Schematic diagram of the lower bearing structure in an embodiment of the present invention.

[0028] Figure 7 Schematic diagram of the lubrication system in an embodiment of the present invention.

[0029] In the figure:

[0030] 1-0. Upper bearing component; 1-1. Upper bearing 1; 1-2. Upper bearing 2; 1-3. Upper oil slinger;

[0031] 2-0. Lower bearing component; 2-1. Positioning ring; 2-2. Lower bearing; 2-3. Lower oil slinger;

[0032] 3-0. Upper shaft; 3-1. Step shaft; 3-2. Flange; 3-3. Key; 3-4. Shaft end retaining ring; 3-5. Shaft end retaining ring connecting piece;

[0033] 4-0. Lubrication system; 4-1. Upper bearing lubrication device A; 4-2. Upper bearing lubrication device B; 4-3. Upper bearing waste oil recovery device; 4-4. Lower bearing lubrication device; 4-5. Lower bearing waste oil recovery device;

[0034] 5. Round nut; 6. Upper bearing cover; 7. Oil retaining ring; 8. Bearing body; 9. Bearing sleeve; 10. Lower bearing cover; 11. Dust ring; 12. Upper and lower shaft connecting parts; 13. Lower shaft. DETAILED DESCRIPTION

[0035] The embodiments of the present invention will be described in further detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to those skilled in the art.

[0036] The preferred specific implementation of the flotation machine support shaft system and the flotation machine having the shaft system of the present invention is:

[0037] It includes an upper bearing component, a lower bearing component, an upper shaft, a lubrication system, a round nut, an upper bearing gland, an oil retaining ring, a bearing body, a bearing sleeve, a lower bearing gland, and a dust ring;

[0038] The upper bearing component comprises an upper bearing 1, an upper bearing 2, and an upper oil-slinging pan;

[0039] The lower bearing component includes a positioning ring, a lower bearing, and a lower oil slinger pan;

[0040] The upper shaft includes a stepped shaft, a flange, a key, a shaft end retaining ring, and a shaft end retaining ring connecting piece;

[0041] The lubrication system comprises an upper bearing lubrication device A, an upper bearing lubrication device B, an upper bearing waste oil recovery device, a lower bearing lubrication device, and a lower bearing waste oil recovery device;

[0042] The step shaft is installed in the bearing body and is coaxial with the bearing body;

[0043] The upper bearing assembly is installed into the upper part of the upper shaft from the upper end of the upper shaft, and the lower bearing assembly is installed into the lower part of the upper shaft from the upper end or the lower end of the upper shaft.

[0044] The inner and outer rings of the upper bearing 1 and the upper bearing 2 of the upper bearing component are separated, and can withstand axial force and radial force, and the clearance of the upper bearing component can be adjusted through the upper bearing pressure cover.

[0045] The inner and outer rings of the lower bearing of the lower bearing component are separated, which can withstand radial force, improve the rigidity of the shaft system, and compensate for the thermal deformation of the upper shaft.

[0046] The lower end of the stepped shaft of the upper shaft is connected to the flange through the key and the shaft end retaining ring, and the flange is connected to the shaft end flange of the lower shaft.

[0047] The upper oil-slinging pan is connected to the stepped shaft and is arranged below the inner ring of the upper bearing component;

[0048] The lower oil-slinging pan is connected to the stepped shaft and is arranged below the inner ring of the lower bearing component.

[0049] The bearing sleeve is arranged between the bearing body and the lower bearing component, the inner bottom surface of the bearing sleeve is connected to the outer ring of the lower bearing, and the lower bearing pressure cover is arranged at the lower part.

[0050] The dust ring is mounted on the stepped shaft and arranged below the lower bearing gland.

[0051] In the lubrication system:

[0052] The upper bearing lubrication device A is installed on the side of the upper bearing gland;

[0053] The upper bearing lubrication device B is installed on the bearing body, between the upper bearing 1 and the upper bearing 2;

[0054] The upper bearing waste oil recovery device is installed on the side of the bearing body, corresponding to the oil retaining ring;

[0055] The lower bearing lubrication device is installed on the side of the bearing body, above the lower bearing;

[0056] The lower bearing waste oil recovery device is installed on the side of the lower bearing pressure cover.

[0057] The flotation machine supporting shaft system and the flotation machine having the shaft system of the present invention can be disassembled on both sides, have stable performance, are convenient for maintenance, and workers can choose different ways to disassemble and assemble the shaft system structure for the flotation machine.

[0058] The shaft system is the main mechanical component of the flotation machine. The rotation and main shaft support of the flotation machine are all on this component. The shaft system is the core of the flotation machine's operating components. It not only supports the entire operating components, but also realizes motion transmission. Whether the motion transmission process is smooth and stable directly determines whether the flotation machine works normally. All external forces are transmitted through the upper shaft. The external forces are divided into axial force and radial force. The axial force is transmitted to the bearing body through the upper bearing installed on the upper shaft, and then transmitted to the crossbeam; the radial force is mainly transmitted to the bearing body through the lower bearing installed on the upper shaft, and then transmitted to the crossbeam. The rotation is that the step shaft drives the flange and the lower shaft connected to the flange to rotate together through the key. The focus of optimizing the shaft system design is to optimize the bearing selection. Specific embodiment:

[0060] A shaft system structure for a large flotation machine, such as Figure 3 As shown, it includes an upper bearing component 1-0, a lower bearing component 2-0, an upper shaft 3-0, a lubrication system 4-0, a round nut 5, an upper bearing cover 6, an oil retaining ring 7, a bearing body 8, a bearing sleeve 9, a lower bearing cover 10, and a dust ring 11. The step shaft 3-1 is installed in the bearing body 8 and is coaxial with the bearing body 8. The upper bearing component 1-0 and the lower bearing component 2-0 are installed at both ends of the step shaft 3-1 respectively. Figure 4 As shown, the upper bearing assembly 1-0 can be disassembled and assembled from the upper part of the upper shaft 3-0, and the lower bearing assembly 2-0 can be disassembled and assembled from the upper part of the upper shaft 3-0 or from the lower part of the upper shaft 3-0.

[0061] The inner and outer rings of the upper bearing 1-1 and the upper bearing 2 1-2 of the above-mentioned upper bearing component 1-0 are separated and can withstand axial force and radial force. The clearance of the upper bearing component 1-0 can be adjusted by adjusting the upper bearing cover 6.

[0062] The inner and outer rings of the lower bearing 2-2 of the lower bearing component 2-0 are separated to bear radial force, improve the rigidity of the shaft system, and compensate for the thermal deformation of the upper shaft 3-0. There is a lower bearing pressure cover 10 on the upper part.

[0063] The upper shaft 3-0 has a stepped shaft 3-1 and a flange 3-2 connected by a key 3-3, and a shaft end retaining ring 3-4 is provided at the flange connection between the flange 3-2 and the lower shaft 13.

[0064] The upper oil-slinging plate 1-3 is connected to the step shaft 3-1, and the upper part of the upper oil-slinging plate 1-3 has an inner ring of the upper bearing component 1-0. The lower oil-slinging plate 2-3 is connected to the step shaft 3-1, and the upper part of the lower oil-slinging plate 2-3 has an inner ring of the lower bearing component 2-0.

[0065] A bearing sleeve 9 is arranged between the bearing body 8 and the lower bearing component 2-0. The inner bottom section of the bearing sleeve 9 is connected to the outer ring of the lower bearing 2-2, and a lower bearing pressure cover 10 is arranged at the lower part.

[0066] The dust ring 11 is installed on the stepped shaft 3-1, below the lower bearing cover 10.

[0067] Lubrication system 4-0, upper bearing lubrication device A4-1 is installed on the upper bearing cover 6 and upper bearing lubrication device B4-2 is installed on the bearing body 8, upper bearing waste oil recovery device 4-3 is installed on the oil retaining ring 7 of the bearing body 8, lower bearing lubrication device 4-4 is installed on the bearing body 8, and lower bearing waste oil recovery device 4-5 is installed on the lower bearing cover 10.

[0068] The present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Various changes and improvements may be made without departing from the spirit and scope thereof, and these changes and improvements shall all fall within the scope of protection required.

[0069] Technical features and effects of the present invention:

[0070] As the core shaft structure of large and super large flotation machines, the beneficial effects brought by the technical solution are mainly reflected in the following aspects:

[0071] 1. Design a reasonable upper bearing component to support and fix the entire spindle system. The upper bearing supports and positions firmly and stably. Single-row tapered roller bearings can achieve the use effect of deep groove ball bearings + thrust ball bearings. The rolling element of the tapered roller bearing is a cylinder, which is in line contact with the raceway, and has a much higher load-bearing capacity than the bearing whose rolling element is a ball. In large and heavy-loaded mineral processing flotation machines, line-contact tapered roller bearings are more suitable. In addition, the locking force of the bearing is guaranteed by machining, which effectively avoids the locking force being affected by human factors. In addition, the tapered roller bearing configuration has a simple structure and a small number of parts, which is easy to install and debug. During installation, the bearing clearance can be adjusted by adjusting the bolts of the upper bearing gland to keep the bearing in a better state.

[0072] In the shaft system design of the present invention, the supporting role mainly falls on the upper bearing. Two tapered roller bearings are selected at the upper part to play a supporting role. The force is transmitted to the bearing body through the bearings. When the shaft system generates an upward force, this pair of tapered roller bearings can also well transmit the force to the upper bearing cover to the bearing body.

[0073] 2. The main shaft can be freely extended and retracted within a certain range, and can well withstand the radial force transmitted from the lower shaft of the impeller, and at the same time can well compensate for the change in the main shaft size caused by the heating of the main shaft. The lower bearing only bears radial force, has high rigidity, and reduces the probability of deformation. The inner and outer rings of the lower bearing are separated, which can effectively prevent the heat generated by the thermal deformation of the main shaft.

[0074] 3. The cylindrical roller bearing adopts a detachable inner and outer ring structure. This type of bearing is not only easy to disassemble, but also has a large clearance. The upper and lower bearings can cooperate well to form a strong whole. When the spindle temperature changes, it can well supplement the expansion and contraction.

[0075] 4. During the operation, the mixing mechanism of the flotation machine is a long-axis cantilever structure. The heavy impeller is at the bottom of the shaft. The centrifugal force is very large, and the radial force generated is very large. In addition, there are many uncertain factors in the working conditions. The force is uncertain due to the impact of the slurry flow. In this design, the bearing does not bear axial force, but only pure radial force. Double-row cylindrical roller bearings with very high rigidity are selected, which will not deform or deform very little under the action of radial force.

[0076] 5. The lower bearing is visible, so daily inspection and maintenance can be carried out online.

[0077] 6. The inflatable flotation machine provides high-pressure air through an air pump. The high-pressure air has a certain temperature. When the temperature rises, the main shaft will inevitably expand linearly, while the temperature of the inner ring, outer ring and bearing body of the bearing will not change synchronously, and there will be a temperature difference. This design can realize online adjustment to enable the bearing to obtain appropriate clearance.

[0078] 7. During maintenance, the lower shaft can be removed to facilitate the removal of the upper and lower bearing components on both sides from the upper and lower sides; if the working conditions are not suitable for disassembling the lower shaft and impeller components, the upper and lower bearing components can be removed from the upper side of the step shaft in one direction for maintenance. The two disassembly and assembly methods are flexible and more user-friendly.

[0079] 8. The upper shaft is connected to the flange by a key to transmit torque, and the axial direction is fixed by a shaft end retaining ring through a connecting piece, which ensures reliable force transmission and firm fixation.

[0080] 9. The optimized and developed stepped upper shaft design can realize the double-sided disassembly of the bearing, making the disassembly and maintenance more humane. The shaft system runs more smoothly and is more suitable for the working conditions of the flotation machine.

[0081] 10. The bearing sleeve is designed to realize the axial positioning and fixation of the lower bearing. Because the bearing only bears the radial force generated when the main shaft drives the impeller to rotate, the upper end of the lower bearing cannot have axial contact with the bearing body. At the same time, it is convenient for the disassembly of the double-row cylindrical roller bearing and the adjustment of the clearance.

[0082] 11. An oil-slinging pan is designed, which is connected to the upper shaft and rotates together. The oil-slinging pan supports the inner rings of the upper and lower bearings and rotates together with the inner rings of the bearings. When the grease in the upper and lower bearing cavities circulates to the bottom, the oil-slinging pan catches it and throws it into the oil retaining ring from the outer circle. The grease can only be slowly thrown out along the radial direction of the bearing, and the bearing is fully lubricated.

[0083] 12. A dust ring is designed to effectively prevent foam and dust from entering the bearing cavity of the shaft system and prevent pollutants from grinding and damaging the lower bearing.

[0084] 13. A lubrication system is designed. The upper bearing component has two places to feed grease, ensuring that the grease is quickly fed into the upper bearing 1-1 and the upper bearing 2-2, avoiding the need for several hours to achieve lubrication from one place on the upper part. The upper bearing 2-2 bears the axial force of the support. If there is a lack of oil, the upper bearing 2-2 will burn out in a few tens of minutes; if the grease is only fed from the middle, during the operation, the upper bearing 2-1-2 cavity is easy to be lubricated, and the upper bearing 1-1 is not easy to bring grease up, which is easy to cause the upper bearing 1-1 to lack oil and heat damage. A waste grease recovery device is designed to avoid secondary pollution. At the same time, the bearing components can be cleaned regularly without disassembling the upper bearing component 1-0 and the lower bearing component 2-0. Equipped with a waste grease recovery device, waste grease is collected in time, avoiding secondary pollution of the bearing, the bearing grease is clean and excellent, and the equipment is more environmentally friendly. Promote the stability of the flotation machine operation.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A flotation machine support shaft system, characterized in that: It comprises an upper bearing component (1-0), a lower bearing component (2-0), an upper shaft (3-0), a lower shaft (13), a lubrication system (4-0), a round nut (5), an upper bearing cover (6), an oil retaining ring (7), a bearing body (8), a bearing sleeve (9), a lower bearing cover (10), and a dust ring (11); The upper bearing component (1-0) comprises an upper bearing 1 (1-1), an upper bearing 2 (1-2), and an upper oil-slinging plate (1-3); The lower bearing component (2-0) comprises a positioning ring (2-1), a lower bearing (2-2), and a lower oil-slinging plate (2-3); The upper shaft (3-0) comprises a stepped shaft (3-1), a flange (3-2), a key (3-3), a shaft end retaining ring (3-4), and a shaft end retaining ring connecting piece (3-5); The lubrication system (4-0) comprises an upper bearing lubrication device A (4-1), an upper bearing lubrication device B (4-2), an upper bearing waste oil recovery device (4-3), a lower bearing lubrication device (4-4), and a lower bearing waste oil recovery device (4-5); The step shaft (3-1) is installed in the bearing body (8) and is coaxial with the bearing body (8); The upper bearing component (1-0) is installed into the upper part of the upper shaft (3-0) from the upper end of the upper shaft (3-0), and the lower bearing component (2-0) is installed into the lower part of the upper shaft (3-0) from the upper end or the lower end of the upper shaft (3-0).

2. The flotation machine support shaft system according to claim 1, characterized in that: The inner and outer rings of the upper bearing one (1-1) and the upper bearing two (1-2) of the upper bearing component (1-0) are separated, and an upper bearing pressure cover (6) is provided.

3. The flotation machine support shaft system according to claim 2, characterized in that: The inner and outer rings of the lower bearing (2-2) of the lower bearing component (2-0) are separated, and the lower bearing pressure cover (10) is provided.

4. The flotation machine support shaft system according to claim 3, characterized in that: The lower end of the stepped shaft (3-1) of the upper shaft (3-0) is connected to the flange (3-2) via the key (3-3) and the shaft end retaining ring (3-4), and the flange (3-2) is connected to the shaft end flange of the lower shaft (13).

5. The flotation machine support shaft system according to claim 4, characterized in that: The upper oil-slinging plate (1-3) is connected to the stepped shaft (3-1) and is arranged below the inner ring of the upper bearing component (1-0); The lower oil-slinging pan (2-3) is connected to the stepped shaft (3-1) and is arranged below the inner ring of the lower bearing component (2-0).

6. The flotation machine support shaft system according to claim 5, characterized in that: The bearing sleeve (9) is arranged between the bearing body (8) and the lower bearing component (2-0), the inner bottom surface of the bearing sleeve (9) is connected to the outer ring of the lower bearing (2-2), and the lower bearing pressure cover (10) is arranged at the lower part.

7. The flotation machine support shaft system according to claim 6, characterized in that: The dust ring (11) is mounted on the stepped shaft (3-1) and is arranged below the lower bearing cover (10).

8. The flotation machine support shaft system according to claim 7, characterized in that: In the lubrication system (4-0): The upper bearing lubrication device A (4-1) is installed on the side of the upper bearing pressure cover (6); The upper bearing lubrication device B (4-2) is installed on the bearing body (8) between the upper bearing 1 (1-1) and the upper bearing 2 (1-2); The upper bearing waste oil recovery device (4-3) is installed on the side of the bearing body (8) corresponding to the oil retaining ring (7); The lower bearing lubrication device (4-4) is installed on the side of the bearing body (8), above the lower bearing (2-2); The lower bearing waste oil recovery device (4-5) is installed on the side of the lower bearing pressure cover (10).

9. A flotation machine, characterized in that: The flotation machine is provided with a flotation machine supporting shaft system as claimed in any one of claims 1 to 8.

Images