CN111306201A

CN111306201A - Flotation machine supporting shaft system and flotation machine with same

Info

Publication number: CN111306201A
Application number: CN202010224861.3A
Authority: CN
Inventors: 谢淑兰; 罗秀建; 王青芬; 韩登峰; 陈强; 吴峰; 史帅星; 杨义红
Original assignee: Bgrimm Mechanical And Electrical Technology Co ltd
Current assignee: Bgrimm Mechanical And Electrical Technology Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-06-19

Abstract

The invention discloses a flotation machine supporting shaft system and a flotation machine with the same, wherein the flotation machine supporting shaft system comprises an upper bearing part, a lower bearing part, an upper shaft, a lubricating system, a round nut, an upper bearing gland, an oil deflector ring, a bearing body, a bearing sleeve, a lower bearing gland and a dustproof ring; the upper bearing component comprises an upper bearing I, an upper bearing II and an upper oil thrower; the lower bearing part comprises a positioning ring, a lower bearing and a lower oil thrower; the upper shaft comprises a step shaft, a flange, a key, a shaft end retainer ring and a shaft end retainer ring connecting piece; the lubricating system comprises an upper bearing lubricating device A, an upper bearing lubricating device B, an upper bearing waste oil recovery device, a lower bearing lubricating device and a lower bearing waste oil recovery device; the step shaft is arranged in the bearing body and is coaxial with the bearing body; the upper bearing assembly is mounted to the upper portion of the upper shaft from the upper end of the upper shaft, and the lower bearing assembly is mounted to the lower portion of the upper shaft from either the upper end or the lower end of the upper shaft. Can be disassembled from two sides, has stable performance and convenient maintenance, and can be disassembled and assembled by workers in different modes.

Description

Flotation machine supporting shaft system and flotation machine with same

Technical Field

The invention relates to flotation equipment for nonferrous metals, ferrous metals and rare noble metals, in particular to a flotation machine supporting shaft system and a flotation machine with the shaft system.

Background

The flotation method is widely applied to the recovery of nonferrous metals, ferrous metals and rare noble metals, and a flotation machine is main equipment for realizing the process. Along with the continuous expansion of the scale of the concentrating mill, the dilution of ores also puts higher requirements on the large-scale of flotation equipment. The pneumatic mechanical stirring type flotation machine is a large-scale main machine type of the flotation machine, and the specification of the pneumatic mechanical stirring type flotation machine applied to the industry at present reaches 680 cubic meters.

In the operation process of the flotation machine, a shaft system is always in full-load operation, if abnormality occurs, the flotation machine must be shut down for maintenance, and economic loss caused by shutdown is obvious, so that reliability and stability are important indexes for evaluating the quality of the flotation machine.

The shafting structure of the large or super-large flotation machine, the bearing configuration in the shafting and the main shaft structure mainly use the structural design of the small flotation machine. The shafting structure of a common medium-large external inflatable flotation machine is shown in figure 1, and the main characteristic of the existing shafting structure is that the bearing arrangement adopts self-aligning spherical roller bearings arranged on bushings, and the main shaft adopts an inverted cone shaft structure form as shown in figure 2. The bearing temperature in the shaft system is high, the main shaft faults are few in small and medium-sized flotation machines, the frequency is high in large and super-large flotation machines, and the existing shaft system design cannot meet the operation requirements of the large and super-large flotation machines.

The prior art has the following disadvantages:

(1) the bearing selected by the existing shafting is a self-aligning spherical roller bearing arranged on a taper sleeve, the bearing has strong radial bearing capacity and can bear a certain axial load, and the bearing is mainly used in a mechanism with large radial load.

(2) For the external inflatable flotation machine, after the equipment is large-sized, the diameter of a main shaft and the size of a bearing of the flotation machine are also increased, the bearing selected by a shaft system is a self-aligning spherical roller bearing on a taper sleeve, the locking force of the bearing and the shaft is completely determined by the locking condition of a locking nut during assembly, and the external inflatable flotation machine has great uncertainty and is not controlled as well as small-sized equipment. The locking force is not enough, the bearing and the main shaft are loosened, the main shaft sinks integrally, the support positioning is changed, and the bearing cannot work normally and is damaged.

(3) After the shafting is assembled, the lower bearing is invisible, and is more like a black box, so that the actual condition of the bearing is difficult to observe and judge. The bearing body size grow, and the distance between two bearings increases, and the required precision of axiality can not reduce.

(4) The shaft system structure of the existing large-sized flotation machine has the main shaft of an inverted cone structure, can be disassembled and assembled only from one side, is very inconvenient, particularly, the size of each part is increasingly large in the large-sized process of the flotation machine, the disassembling and assembling difficulty and the cost are increased along with the increase of the size,

(5) unable online fastening, during the daily maintenance, must wholly disassemble, the maintenance cost is higher, seriously influences customer's use and experiences.

(6) The lubricating grease in the lubricating cavity of the bearing does not have a recovery loop in the lubrication of the existing shafting, and the grease flows to the lower bearing when more grease is used, so that the friction and the abrasion inside the lower bearing are increased, the bearing is finally burnt and adhered, the service life is shortened, the equipment failure rate is increased, and the production operation is influenced.

Disclosure of Invention

The invention aims to provide a flotation machine supporting shaft system and a flotation machine with the same.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a supporting shaft system of a flotation machine and the flotation machine with the shaft system, which comprises an upper bearing part, a lower bearing part, an upper shaft, a lubricating system, a round nut, an upper bearing gland, an oil deflector ring, a bearing body, a bearing sleeve, a lower bearing gland and a dustproof ring;

the upper bearing part comprises an upper bearing I, an upper bearing II and an upper oil thrower;

the lower bearing part comprises a positioning ring, a lower bearing and a lower oil thrower;

the upper shaft comprises a step shaft, a flange, a key, a shaft end retainer ring and a shaft end retainer ring connecting piece;

the lubricating system comprises an upper bearing lubricating device A, an upper bearing lubricating device B, an upper bearing waste oil recovery device, a lower bearing lubricating device and a lower bearing waste oil recovery device;

the step shaft is arranged in the bearing body and is coaxial with the bearing body;

the upper bearing assembly is fitted into the upper portion of the upper shaft from the upper end thereof, and the lower bearing assembly is fitted into the lower portion of the upper shaft from the upper end or the lower end thereof.

According to the technical scheme provided by the invention, the supporting shaft system of the flotation machine and the flotation machine with the shaft system provided by the embodiment of the invention can be detached from two sides, have stable performance and are convenient to maintain, and workers can select different modes for detaching and assembling.

Drawings

Fig. 1 is a schematic diagram of a shafting structure in the prior art.

Fig. 2 is a schematic view of a reverse taper shaft structure in the prior art.

FIG. 3 is a schematic diagram of a shafting structure in the embodiment of the present invention.

FIG. 4 is a schematic view of a spindle and a bearing structure according to an embodiment of the present invention.

Fig. 5 is a schematic view of an upper bearing structure in an embodiment of the present invention.

FIG. 6 is a schematic view of a lower bearing structure according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a lubricating system in an embodiment of the invention.

In the figure:

1-0. an upper bearing component; 1-1, upper bearing I; 1-2, an upper bearing II; 1-3, an oil thrower is arranged;

2-0. a lower bearing component; 2-1, a positioning ring; 2-2. a lower bearing; 2-3, discharging an oil thrower disc;

3-0. upper shaft; 3-1, step shaft; 3-2, flange; 3-3. a bond; 3-4, shaft end retainer ring; 3-5, shaft end retainer ring connecting piece;

4-0. lubrication system; 4-1, upper bearing lubricating device A; 4-2, an upper bearing lubricating device B; 4-3, an upper bearing waste oil recovery device; 4-4. lower bearing lubricating device; 4-5, a lower bearing waste oil recovery device;

5. a round nut; 6. an upper bearing gland; 7. an oil slinger; 8. a bearing body; 9. a bearing sleeve; 10. a lower bearing gland; 11. a dust ring; 12. an upper and lower shaft connecting member; 13. a lower shaft.

Detailed Description

The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.

The invention relates to a flotation machine supporting shaft system and a flotation machine with the same, wherein the preferable specific implementation mode is as follows:

the bearing comprises an upper bearing part, a lower bearing part, an upper shaft, a lubricating system, a round nut, an upper bearing gland, an oil slinger, a bearing body, a bearing sleeve, a lower bearing gland and a dustproof ring;

The first upper bearing and the second upper bearing are separated from each other, can bear axial force and radial force, and can adjust the clearance of the upper bearing component through the upper bearing gland.

The inner ring and the outer ring of the lower bearing component are separated, so that the radial force can be borne, the shaft system rigidity is improved, and the thermal deformation of the upper shaft is compensated.

The lower end of the step shaft of the upper shaft is connected with the flange through the key and the shaft end retainer ring, and the flange is connected with the shaft end flange of the lower shaft.

The upper oil thrower is connected with the step shaft and arranged below the inner ring of the upper bearing part;

the lower oil thrower is connected with the step shaft and arranged below the inner ring of the lower bearing part.

The bearing sleeve is arranged between the bearing body and the lower bearing part, the inner bottom surface of the bearing sleeve is connected with the lower bearing outer ring, and the lower part of the bearing sleeve is provided with the lower bearing gland.

The dustproof ring is arranged on the step shaft and is arranged below the lower bearing gland.

In the lubrication system:

the upper bearing lubricating device A is arranged on the side part of the upper bearing gland;

the upper bearing lubricating device B is arranged on the bearing body and is arranged between the first upper bearing and the second upper bearing;

the upper bearing waste oil recovery device is arranged on the side part of the bearing body and corresponds to the oil retainer ring;

the lower bearing lubricating device is arranged at the position on the side part of the bearing body and above the lower bearing;

and the lower bearing waste oil recovery device is arranged on the side part of the lower bearing gland.

The flotation machine supporting shaft system and the flotation machine with the shaft system have the advantages of stable performance and convenient maintenance, and can be disassembled on two sides, and workers can disassemble and assemble the shaft system structure for the flotation machine in different modes.

The shaft system is the main mechanical part of the flotation machine, and the rotation of the flotation machine and the main shaft support are arranged on the part. The shaft system is the core of the running part of the flotation machine, and not only supports the whole running part, but also realizes motion transmission. And whether the flotation machine works normally or not is directly determined whether the flotation machine is smooth and stable or not in the motion transmission process. All external forces are transmitted through the upper shaft, the external forces are divided into axial forces and radial forces, and the axial forces are transmitted to the bearing body through the upper bearing arranged on the upper shaft and then transmitted to the cross beam; the radial force is transmitted to the bearing body mainly through a lower bearing arranged on the upper shaft and then transmitted to the cross beam, and the step shaft rotates to drive the flange and the lower shaft connected with the flange to rotate together through a key. The key point of optimizing the design of the shafting is to optimize the bearing model selection.

The specific embodiment is as follows:

a shafting structure for a large-scale flotation machine is shown in figure 3 and comprises an upper bearing part 1-0, a lower bearing part 2-0, an upper shaft 3-0, a lubricating system 4-0, a round nut 5, an upper bearing gland 6, an oil retainer 7, a bearing body 8, a bearing sleeve 9, a lower bearing gland 10 and a dust ring 11. Wherein the step shaft 3-1 is arranged in the bearing body 8 and is coaxial with the bearing body 8, wherein the upper bearing part 1-0 and the lower bearing part 2-0 are respectively arranged at the two ends of the step shaft 3-1. As shown in FIG. 4, the upper bearing assembly 1-0 is disassembled from the upper part of the upper shaft 3-0, and the lower bearing assembly 2-0 is disassembled from the upper part of the upper shaft 3-0 and also can be disassembled from the lower part of the upper shaft 3-0.

The inner and outer rings of the upper bearing I1-1 and the upper bearing II 1-2 of the upper bearing part 1-0 are separated, so that the axial force and the radial force can be borne, and the clearance of the upper bearing part 1-0 is adjusted by adjusting the upper bearing gland 6.

The inner and outer rings of the lower bearing 2-2 of the lower bearing component 2-0 are separated, so that the radial force is borne, the shaft system rigidity is improved, the thermal deformation of the upper shaft 3-0 can be compensated, and the upper part is provided with a lower bearing gland 10.

The upper shaft 3-0 is provided with a step shaft 3-1 and a flange 3-2 which are connected through a key 3-3, and a shaft end retainer ring 3-4 is arranged at the flange connection part of the lower part of the flange 3-2 and the lower shaft 13.

The upper oil thrower wheel 1-3 is connected with the step shaft 3-1, the upper part of the upper oil thrower wheel 1-3 is provided with an upper bearing part 1-0 inner ring, the lower oil thrower wheel 2-3 is connected with the step shaft 3-1, and the upper part of the lower oil thrower wheel 2-3 is provided with a lower bearing part 2-0 inner ring.

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 with the outer ring of the lower bearing 2-2, and the lower part is provided with a lower bearing gland 10.

The dust ring 11 is arranged on the step shaft 3-1 and below the lower bearing gland 10.

The lubricating system 4-0, the upper bearing lubricating device A4-1 is installed on the upper bearing gland 6 and the upper bearing lubricating device B4-2 is installed on the bearing body 8, the upper bearing waste oil recovery device 4-3 is installed on the oil retainer 7 of the bearing body 8, the lower bearing lubricating device 4-4 is installed on the bearing body 8, and the lower bearing waste oil recovery device 4-5 is installed on the lower bearing gland 10.

The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, and various changes and modifications may be made without departing from the spirit and scope thereof, which are intended to be covered by the claims.

The invention has the technical characteristics and effects that:

as the core shafting structure of large and super large flotation machine, the beneficial effect brought by the technical scheme is mainly reflected in the following aspects:

1. the upper bearing component with reasonable design is used for supporting and fixing the whole spindle system. The upper bearing supports and positions, and is firm and stable. The single-row tapered roller bearing can realize that the combination of the deep groove ball bearing and the thrust ball bearing achieves the use effect, and the rolling body of the tapered roller bearing is a cylinder, is in line contact with the raceway and has higher bearing capacity than the bearing with the rolling body being a ball. In a large and heavy-duty ore dressing flotation machine, a tapered roller bearing in line contact is more suitable. Moreover, the locking force of the bearing is guaranteed by machining, and the influence of human factors on the locking force is effectively avoided. And the tapered roller bearing has simple structure and less parts, and is convenient to install and debug. When the bearing is installed, the bearing clearance can be adjusted by only adjusting the bolt of the upper bearing gland, so that the bearing is in a better state.

In the design of the shafting, the supporting function is mainly arranged at the upper bearing, two tapered roller bearings are selected at the upper part for supporting, the acting force is transmitted to the bearing body through the bearings, and when the shafting generates upward force, the pair of tapered roller bearings can also well transmit the force to the upper bearing gland to the bearing body.

2. The main shaft can freely stretch and retract within a certain range, can well bear radial force transmitted by a lower shaft of the impeller, and can well compensate size change of the main shaft caused by heating of the main shaft. The lower bearing only bears radial force, the rigidity is high, and the probability of deformation is reduced. The inner ring and the outer ring of the lower bearing are separated, so that the heat generated by the blocking of the thermal deformation of the main shaft can be effectively realized.

3. The cylindrical roller bearing adopts an inner ring and outer ring detachable structure, the bearing is convenient to detach and large in clearance, and the upper bearing and the lower bearing can be well matched to form a powerful whole. When the temperature of the main shaft changes, the expansion amount can be well supplemented.

4. In the working process of the stirring mechanism of the flotation machine, the stirring mechanism is of a long-shaft cantilever structure, a heavy impeller is arranged at the lowest end of a shaft, the centrifugal force is large, the generated radial force is large, uncertain factors of working conditions are many, and the stress is uncertain due to the impact force of ore pulp flowing. The bearing does not bear axial force, only bears pure radial force, and a double-row cylindrical roller bearing with very high rigidity is selected, so that deformation is not generated or the deformation is small under the action of radial force.

5. And the lower bearing is visible, so that daily inspection and maintenance can be carried out on line.

6. The inflatable flotation machine provides high-pressure air through the air pump, the high-pressure air has certain temperature, the temperature rises, the main shaft tends to expand linearly, the temperatures of the inner ring, the outer ring and the bearing body of the bearing cannot change synchronously, and temperature difference exists. The online adjustment that this design can be realized makes the bearing obtain suitable play.

7. When in maintenance, the lower shaft can be disassembled to realize the convenient disassembly of the upper bearing part and the lower bearing part at the two sides from the upper side and the lower side; if the working condition is not suitable for disassembling the lower shaft and the impeller part, the upper bearing part and the lower bearing part can be disassembled from the upper side of the step shaft in a one-way mode for maintenance. The two disassembly and assembly modes are flexible to use and more humanized.

8. The upper shaft is fixedly connected with the flange through a step shaft through a key to transfer torque, and the shaft end retainer ring is axially fixed through a connecting piece, so that force transfer is reliable and fixation is firm.

9. The design of the stepped upper shaft is optimized and developed, so that the bearing can be disassembled on two sides, and the disassembly, assembly and maintenance are more humanized. The shafting operation is smoother and more suitable for the working condition of the flotation machine.

10. The bearing sleeve is designed to realize the axial positioning and fixing 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 be in axial contact with the bearing body, and meanwhile, the disassembly and clearance adjustment of the double-row cylindrical roller bearing are facilitated.

11. An oil slinger is designed to be connected to the upper shaft and rotate together. The oil throwing disc supports the upper bearing inner ring and the lower bearing inner ring and rotates together with the bearing inner rings, when lubricating grease in the upper bearing cavity and the lower bearing cavity circulates to the lower part, the oil throwing disc receives the lubricating grease and throws the lubricating grease into the oil retaining ring by the excircle, the lubricating grease can only be slowly thrown out along the radial direction of the bearing, and the bearing is smooth and full.

12. A dust ring is designed. Foam and dust are effectively prevented from entering a bearing cavity of the shafting, and pollutants are prevented from grinding and damaging the lower bearing.

13. A lubrication system is designed. The upper bearing part is provided with two parts for feeding lubricating grease, so that the lubricating grease is ensured to be rapidly fed into the upper bearing I1-1 and the upper bearing II 1-2, the situation that the lubricating can be realized by feeding the upper bearing II 1-2 from the upper part I within several hours is avoided, and the upper bearing II 1-2 bears the axial force of the support, and the bearing II 1-2 can be burnt out if the oil is short for dozens of minutes; if lubricating grease is fed from the middle part, the cavity of the second upper bearing 1-2 can be easily lubricated in the running process, the first upper bearing 1-1 cannot easily bring the lubricating grease, and the first upper bearing 1-1 is easy to lack oil and generate heat to be damaged. And a waste grease recovery device is designed, so that secondary pollution is avoided. And at the same time, the bearing parts can be cleaned regularly without disassembling the upper bearing part 1-0 and the lower bearing part 2-0. Be equipped with waste grease recovery unit, waste grease in time collects, has avoided the secondary pollution of bearing, and bearing lubricating grease is clean good, and equipment is environmental protection more. And the running stability of the flotation machine is promoted.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A supporting shaft system of a flotation machine is characterized by comprising an upper bearing part (1-0), a lower bearing part (2-0), an upper shaft (3-0), a lubricating system (4-0), a round nut (5), an upper bearing gland (6), an oil deflector ring (7), a bearing body (8), a bearing sleeve (9), a lower bearing gland (10) and a dust ring (11);

the upper bearing part (1-0) comprises an upper bearing I (1-1), an upper bearing II (1-2) and an upper oil thrower (1-3);

the lower bearing part (2-0) comprises a positioning ring (2-1), a lower bearing (2-2) and a lower oil thrower (2-3);

the upper shaft (3-0) comprises a step shaft (3-1), a flange (3-2), a key (3-3), a shaft end retainer ring (3-4) and a shaft end retainer ring connecting piece (3-5);

the lubricating system (4-0) comprises an upper bearing lubricating device A (4-1), an upper bearing lubricating device B (4-2), an upper bearing waste oil recovery device (4-3), a lower bearing lubricating device (4-4) and a lower bearing waste oil recovery device (4-5);

the step shaft (3-1) is arranged in the bearing body (8) and is coaxial with the bearing body (8);

the upper bearing assembly (1-0) is arranged on the upper part of the upper shaft (3-0) from the upper end of the upper shaft (3-0), and the lower bearing assembly (2-0) is arranged on the lower part of the upper shaft (3-0) from the upper end or the lower end of the upper shaft (3-0).

2. A 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 part (1-0) are separated and provided with the upper bearing gland (6).

3. A flotation machine support shaft system according to claim 2, characterized in that the lower bearing (2-2) of the lower bearing part (2-0) is provided with separate inner and outer rings and with the lower bearing gland (10).

4. A flotation machine support shaft system according to claim 3, characterized in that the lower end of the step 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 collar (3-4), and the flange (3-2) is connected to the shaft end flange of the lower shaft (13).

5. The flotation machine support shafting of claim 4, wherein:

the upper oil thrower wheel (1-3) is connected with the step shaft (3-1) and is arranged below the inner ring of the upper bearing part (1-0);

the lower oil thrower wheel (2-3) is connected with the step shaft (3-1) and is arranged below the inner ring of the lower bearing part (2-0).

6. A 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 part (2-0), the inner bottom surface of the bearing sleeve (9) is connected with the outer ring of the lower bearing (2-2), and the lower part is provided with the lower bearing gland (10).

7. A flotation machine support shaft system according to claim 6, characterized in that the dust ring (11) is mounted on the step shaft (3-1) below the lower bearing gland (10).

8. Flotation machine support shaft system according to claim 7, characterized in that in the lubrication system (4-0):

the upper bearing lubricating device A (4-1) is arranged on the side part of the upper bearing gland (6);

the upper bearing lubricating device B (4-2) is arranged on the bearing body (8) and is arranged between the upper bearing I (1-1) and the upper bearing II (1-2);

the upper bearing waste oil recovery device (4-3) is arranged on the side part of the bearing body (8) and corresponds to the oil retainer (7);

the lower bearing lubricating device (4-4) is arranged at the position on the side part of the bearing body (8) and above the lower bearing (2-2);

the lower bearing waste oil recovery device (4-5) is arranged on the side part of the lower bearing gland (10).

9. A flotation machine, characterized in that it is provided with a flotation machine support shaft according to any of claims 1 to 8.