Shafting transmission structure

Abstract

Disclosed in the present application is a shafting transmission structure, comprising: a rotating shaft, a shaft support structure and a bearing set, wherein the shaft support structure is sleeved on the outer side of the rotating shaft, and the bearing set comprises a first bearing, a second bearing and a self-aligning bearing which are arranged between the rotating shaft and the shaft support structure. An inner side surface and an outer side surface of the self-aligning bearing are respectively connected to the rotating shaft and the shaft support structure. A first side surface of the first bearing abuts against and is connected to the shaft support structure to bear an axial force in a first direction, and a second side surface of the second bearing abuts against and is connected to the shaft support structure to bear an axial force in a second direction, wherein the first direction is opposite to the second direction. The structure can bear bi-directional axial loads in tandem pump applications, and can also achieve an axial adjustment function of a rotor component, thereby ensuring the stability and load-bearing capacity of the shaft.

Description

Shafting transmission structure TECHNICAL FIELD

[0001] The present application relates to the technical field of shafting transmission, in particular to a shafting transmission structure. BACKGROUND

[0002] A slurry pump is a pump designed specifically for pumping mixtures containing solid particles, i.e. slurry. This pump is commonly used in the mining, metallurgy, coal and other industries, for pumping slurry containing a large amount of solid particles from one place to another. The working principle of the slurry pump is similar to that of a general centrifugal pump, but it is specially designed for the characteristics of the slurry. The slurry pump sucks the slurry from the inlet of the pump through the rotation of the impeller, and pushes the slurry to the outlet through centrifugal force. In this process, the pump must be able to withstand the wear of solid particles and ensure that solid particles do not block the internal passage of the pump.

[0003] Chinese patent CN204283980U discloses a slurry pump bearing oil sealing structure, which comprises a water throwing ring fixed on the shaft passing through the bearing gland portion; the water throwing ring is provided with an extension section extending into the inner side of the bearing gland; the inner side of the bearing gland is provided with a skeleton type rubber oil seal matched with the middle section of the extension section of the water throwing ring; the front section of the extension section of the water throwing ring is provided with a spiral groove.

[0004] From the above prior art, it can be seen that the existing slurry pump mainly connects the bracket and the shaft through the bearing, but when the pump is working, the liquid is sucked in through the rotation of the impeller and is discharged under the action of centrifugal force, which will produce a hydrodynamic effect, resulting in the generation of axial thrust. If these thrusts are not properly handled, they will have a negative impact on the performance and service life of the pump.

[0005] SUMMARY

[0006] The purpose of the present application is to overcome the above technical deficiencies and provide a shafting transmission structure to solve the technical problem that the existing pump will generate axial thrust when working, which will have a negative impact on the performance and service life of the pump.

[0007] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0008] The application provides a shaft transmission structure, comprising a rotating shaft, a shaft support structure and a bearing set, the shaft support structure is sleeved on the outside of the rotating shaft; the bearing set comprises a first bearing, a second bearing and a self-aligning bearing arranged between the rotating shaft and the shaft support structure, the inner side and the outer side of the self-aligning bearing are connected with the rotating shaft and the shaft support structure respectively, the first side of the first bearing is connected to the shaft support structure in abutment to bear the axial force in the first direction, the second side of the second bearing is connected to the shaft support structure in abutment to bear the axial force in the second direction, wherein the first direction is opposite to the second direction.

[0009] In some embodiments, the shaft support structure comprises a bracket and a bearing box body, the bearing box body is mounted on the bracket and sleeved on the outside of the rotating shaft, and the first bearing, the second bearing and the self-aligning bearing are connected with the rotating shaft and the bearing box body respectively.

[0010] In some embodiments, the inside of the bearing box body is formed with a cooling cavity, the first bearing, the second bearing and the self-aligning bearing are arranged in the cooling cavity, and cooling liquid and a cooling member are arranged in the cooling cavity, and the cooling member is used for cooling the cooling liquid.

[0011] In some embodiments, the cooling member comprises a cooling pipe, the cooling pipe is arranged in the inside of the cooling cavity, and the two ends of the cooling pipe are communicated with a water inlet and a water outlet arranged on one side of the bearing box body respectively.

[0012] In some embodiments, the cooling pipe is a coil pipe.

[0013] In some embodiments, the shaft support structure further comprises a rear bearing gland, a rear dustproof disc and a rear pressing ring, the rear bearing gland is arranged at one end of the bearing box body, a first protrusion is arranged on the inside of the one end of the bearing box body close to the rear bearing gland, and the first bearing and the second bearing are arranged between the rear bearing gland and the first protrusion in sequence; the rear dustproof disc is arranged between the rear bearing gland and the rotating shaft; and the rear pressing ring is arranged on the upper side of the bearing box body at positions corresponding to the first bearing and the second bearing, the two ends of the rear pressing ring extend to the two sides of the bearing box body along the outer wall of the bearing box body, and the two ends of the rear pressing ring are connected with the bracket.

[0014] In some embodiments, the shaft support structure further comprises a front bearing gland, a front dustproof disc, a front compression ring and a dismounting ring, the front bearing gland is arranged at the other end of the bearing box body, the bearing box body is provided with a second protrusion at the inner side of the end close to the front bearing gland, and the self-aligning bearing is arranged between the front bearing gland and the second protrusion; the front dustproof disc is arranged between the front bearing gland and the rotating shaft; and the front compression ring is arranged at the position corresponding to the self-aligning bearing on the upper side of the bearing box body, both ends of the front compression ring extend to both sides of the bearing box body along the outer wall of the bearing box body, and the front compression ring is connected with the bracket.

[0015] In some embodiments, the first bearing is a thrust roller bearing.

[0016] In some embodiments, the second bearing is a single-flange cylindrical roller bearing.

[0017] In some embodiments, the self-aligning bearing is a cylindrical roller bearing.

[0018] Compared with the prior art, the shafting transmission structure provided by the application is provided with three bearings, the self-aligning bearing provides necessary radial support and allows a certain degree of angular adjustment, the first bearing and the second bearing bear axial forces in the first direction and the second direction respectively, and the directions of the first direction and the second direction are opposite, the axial force of the axial load to the right is absorbed by the first bearing on one side, and the axial force of the axial load to the left is offset by the second bearing on the other side, so that the structure can bear the bidirectional axial load in the series pump application, the axial adjustment function of the rotor component can be realized, and the stability and carrying capacity of the shaft are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is a schematic diagram of the overall three-dimensional structure of the shafting transmission structure provided by the embodiment of the application;

[0020] FIG. 2 is a schematic diagram of the overall front view cross-sectional structure of the shafting transmission structure provided by the embodiment of the application;

[0021] FIG. 3 is a schematic diagram of the rear view structure of the shafting transmission structure provided by the embodiment of the application;

[0022] FIG. 4 is a schematic diagram of the structure of the cooling pipe of the shafting transmission structure provided by the embodiment of the application.

[0023] Legend: 1, rotating shaft; 2, shaft support structure; 21, bracket; 22, bearing box body; 221, water inlet; 222, water outlet; 23, cooling pipe; 24, rear bearing gland; 25, rear dustproof disc; 26, rear compression ring; 27, front bearing gland; 28, front dustproof disc; 29, front compression ring; 210, dismounting ring; 3, bearing set; 31, first bearing; 32, second bearing; 33, self-aligning bearing. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0025] In order to solve the technical problem that the pump generates axial thrust when working, which has a negative impact on the performance and service life of the pump, the present application provides a shaft transmission structure, which can withstand the bidirectional axial load when the tandem pump is applied, and can realize the axial adjustment function of the rotor component, ensuring the stability and carrying capacity of the shaft.

[0026] Please refer to FIG. 1 and FIG. 2, the shaft transmission structure includes: a rotating shaft 1, a shaft support structure 2 and a bearing set 3, the shaft support structure 2 is sleeved on the outside of the rotating shaft 1; the bearing set 3 includes a first bearing 31, a second bearing 32 and a self-aligning bearing 33 arranged between the rotating shaft 1 and the shaft support structure 2, the inner side and the outer side of the self-aligning bearing 33 are connected with the rotating shaft 1 and the shaft support structure 2 respectively, the first side of the first bearing 31 is abuttingly connected to the shaft support structure 2 to bear the axial force in the first direction, the second side of the second bearing 32 is abuttingly connected to the shaft support structure 2 to bear the axial force in the second direction, wherein the first direction is opposite to the second direction.

[0027] In the present scheme, the bearing set 3 includes the first bearing 31, the second bearing 32 and the self-aligning bearing 33, the necessary radial support is provided by the self-aligning bearing 33 and a certain degree of angular adjustment is allowed; the axial forces in the first direction and the second direction are respectively borne by the first bearing 31 and the second bearing 32, and the directions of the first direction and the second direction are opposite, the axial force of the axial load to the right is absorbed by the first bearing 31 on one side, and the axial force of the axial load to the left is cancelled by the second bearing 32 on the other side, so that the structure can withstand the bidirectional axial load when the tandem pump is applied, and can realize the axial adjustment function of the rotor component, ensuring the stability and reliability of the shaft.

[0028] Please refer to FIG. 1 and FIG. 2, in order to realize the connection and support of the rotating shaft 1, in the present embodiment, the shaft support structure 2 includes a bracket 21 and a bearing box body 22, the bracket 21 is used to support and fix the whole structure, the bearing box body 22 is fixedly installed on the bracket 21 and sleeved on the outside of the rotating shaft 1, the first bearing 31, the second bearing 32 and the self-aligning bearing 33 are connected with the rotating shaft 1 and the bearing box body 22 respectively.

[0029] In order to realize the stable connection between the shaft support structure 2 and the rotating shaft 1, further, in some embodiments, the rear end of the bearing box body 22 (the end away from the impeller when the impeller is installed) is fixed by setting the rear bearing gland 24, the rear dustproof disc 25 and the rear pressure ring 26, and the front end of the bearing box body 22 (the end close to the impeller when the impeller is installed) is fixed by setting the front bearing gland 27, the front dustproof disc 28, the front pressure ring 29 and the dismounting ring 210.

[0030] Specifically, please refer to FIG. 2, the rear bearing gland 24 is arranged at the left end of the bearing box body 22, the inside of the left end of the bearing box body 22 is provided with a first protrusion, the inside of the left end of the bearing box body 22 is separated into a limiting interval by the first protrusion and the rear bearing gland 24, the limiting interval is used for installing the first bearing 31 and the second bearing 32, the first side of the first bearing 31 is the right side, the axial force in the first direction is the axial force to the right, the first bearing 31 is arranged at the left side of the first protrusion, the outside of the fixed ring in the first bearing 31 and the right side are tightly matched with the first protrusion, the second bearing 32 is arranged at the left side of the first bearing 31, the second side of the second bearing 32 is the left side, the axial force in the second direction is the axial force to the left, the left side of the second bearing 32 is tightly matched with the right side of the rear bearing gland 24. The front bearing gland 27 is arranged at the right end of the bearing box body 22, the inside of the right end of the bearing box body 22 is provided with a second protrusion, the aligning bearing 33 is installed between the front bearing gland 27 and the second protrusion, and is sleeved at the stepped surface of the rotating shaft 1, the outer ring of the aligning bearing 33 is fixed by the second protrusion and the front bearing gland 27.

[0031] Further, the rear dustproof disc 25 is arranged between the rear bearing gland 24 and the rotating shaft 1, and the front dustproof disc 28 is arranged between the front bearing gland 27 and the rotating shaft 1; which is used to protect the bearings in the mechanical equipment from being polluted by the external dust, water and other pollutants, and also prevent the loss of lubricants (such as lubricating oil or lubricating grease).

[0032] Still further, the rear pressure ring 26 is arranged at the corresponding position of the first bearing 31 and the second bearing 32 on the upper side of the bearing box body 22, both ends of which extend to both sides of the bearing box body 22 along the outer wall of the bearing box body 22 and are connected with the bracket 21; the front pressure ring 29 is arranged at the corresponding position of the aligning bearing 33 on the upper side of the bearing box body 22, both ends of which extend to both sides of the bearing box body 22 along the outer wall of the bearing box body 22 and are connected with the bracket 21. Among them, the middle part of the front pressure ring 29 and the rear pressure ring 26 is annular to respectively fit the upper side of both ends of the bearing box body 22, and both ends of the front pressure ring 29 and the rear pressure ring 26 are plate structures with threaded grooves and bolts, which can be fixedly connected with the bracket 21.

[0033] Preferably, in the present embodiment, the first bearing 31 is a thrust roller bearing, the second bearing 32 is a single lip cylindrical roller bearing, and the aligning bearing 33 is a cylindrical roller bearing. In implementation, the thrust roller bearing and the single lip cylindrical roller bearing of the fixed end of the large pump bear the axial forces to the right and left respectively, and the cylindrical roller bearing is used to automatically adapt to the slight deflection or misalignment of the shaft, and can automatically adjust to the deflection angle of the shaft to reduce the additional load of the bearing.

[0034] Please refer to FIG. 2 and FIG. 3. The bearing may generate heat during operation due to various reasons. In order to achieve cooling of the bearing, in the present embodiment, a sealed cooling cavity is formed in the inside of the bearing box body 22, cooling liquid and a cooling member are arranged in the cooling cavity, the cooling member is used to cool the cooling liquid, and the first bearing 31, the second bearing 32 and the aligning bearing 33 are all arranged in the cooling cavity and can contact the cooling liquid in the cooling cavity to be cooled.

[0035] In one embodiment, the cooling member includes a cooling pipe 23 arranged in the inside of the cooling cavity, and the two ends of the cooling pipe 23 are respectively communicated with the water inlet 221 and the water outlet 222 arranged on one side of the bearing box body 22. In implementation, cooling water is delivered into the cooling pipe 23 through the water inlet 221, and the cooling water exchanges heat with the cooling liquid in the cooling cavity when flowing in the cooling pipe 23, so as to achieve heat dissipation and cooling of the cooling liquid, and finally the cooling water is discharged through the water outlet 222 to achieve circulation cooling.

[0036] Further, in some embodiments, please refer to FIG. 4. The cooling pipe 23 is a coil pipe, so as to increase the contact time and contact area of the cooling pipe 23 and the cooling liquid, and the cooling liquid can fully exchange heat with the cooling water in the cooling pipe 23.

[0037] It should be noted that in other embodiments, the cooling member is not limited to this, and the cooling member can also be a refrigeration fin and the like.

[0038] Working principle: the thrust roller bearing and the single lip cylindrical roller bearing bear the axial forces to the right and left respectively, the cylindrical roller bearing is used to automatically adapt to the slight deflection or misalignment of the shaft, the first bearing 31, the second bearing 32 and the aligning bearing 33 are cooled by contacting the cooling liquid in the cooling cavity, cooling water is delivered into the cooling pipe 23 through the water inlet 221, the cooling water exchanges heat with the cooling liquid in the cooling cavity when flowing in the cooling pipe 23, so as to achieve heat dissipation and cooling of the cooling liquid, and finally the cooling water is discharged through the water outlet 222.

[0039] The application is provided with three bearings, the necessary radial support is provided by the self-aligning bearing 33 and a certain degree of angular adjustment is allowed, the first bearing 31 and the second bearing 32 bear the axial force in the first direction and the second direction respectively, the directions of the first direction and the second direction are opposite, the axial force of the axial load to the right is absorbed by the first bearing 31 on one side, and the axial force of the axial load to the left is counteracted by the second bearing 32 on the other side, so that the structure can bear the bidirectional load in the axial direction in the tandem pump application, and the axial adjustment function of the rotor component can be realized, and the stability and carrying capacity of the shaft are ensured.

[0040] In the description of the application, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0041] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0042] The specific embodiments of the application described above do not constitute a limitation on the scope of protection of the application. Any various other corresponding changes and modifications made according to the technical concept of the application should be included in the protection scope of the claims of the application.

Claims

1. A shafting transmission structure, characterized by, The application relates to a shaft support structure, which comprises a rotating shaft, a shaft support structure sleeved outside the rotating shaft, and a bearing set comprising a first bearing, a second bearing and a self-aligning bearing arranged between the rotating shaft and the shaft support structure. The shaft support structure comprises a bracket and a bearing box body mounted on the bracket and sleeved outside the rotating shaft, and the first bearing, the second bearing and the self-aligning bearing are connected to the rotating shaft and the bearing box body respectively. The bearing box body is internally formed with a cooling cavity, the first bearing, the second bearing and the self-aligning bearing are arranged in the cooling cavity, and the cooling cavity is internally provided with cooling liquid and a cooling element for cooling the cooling liquid. The cooling element comprises a cooling pipe arranged in the cooling cavity and communicating with a water inlet and a water outlet arranged on one side of the bearing box body. The cooling pipe is a coil pipe.

2. The shafting arrangement according to claim 1, characterized in that The shaft support structure further comprises a rear bearing gland, a rear dustproof disc and a rear pressing ring.

3. The shafting arrangement according to claim 2, characterized in that The rear bearing gland is arranged at one end of the bearing box body, the bearing box body is internally provided with a first protrusion near the one end of the rear bearing gland, and the first bearing and the second bearing are arranged between the rear bearing gland and the first protrusion in sequence.

4. The shafting arrangement according to claim 3, characterized in that The rear bearing gland is provided with the rear dustproof disc between the rotating shaft.

5. The shafting arrangement according to claim 4, characterized in that The rear pressing ring is arranged on the upper side of the bearing box body and corresponds to the first bearing and the second bearing, and both ends of the rear pressing ring extend to both sides of the bearing box body along the outer wall of the bearing box body and are connected to the bracket.

6. The shafting arrangement of claim 2, wherein The shaft support structure further comprises a front bearing gland, a front dustproof disc, a front pressing ring and a dismounting ring. The front bearing gland is arranged at the other end of the bearing box body, the bearing box body is internally provided with a second protrusion near the one end of the front bearing gland, and the self-aligning bearing is arranged between the front bearing gland and the second protrusion. The front bearing gland is provided with the front dustproof disc between the rotating shaft. The front pressing ring is arranged on the upper side of the bearing box body and corresponds to the self-aligning bearing, and both ends of the front pressing ring extend to both sides of the bearing box body along the outer wall of the bearing box body and are connected to the bracket.

7. The shafting arrangement according to claim 6, characterized in that The first bearing is a thrust roller bearing. The second bearing is a single-lip cylindrical roller bearing. The self-aligning bearing is a cylindrical roller bearing. ​ 8. The shafting arrangement of claim 1, wherein, ​ 9. The shafting arrangement of claim 1, wherein, ​ 10. The shafting arrangement of claim 1, wherein ​

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