Shafting transmission structure

Abstract

The shafting transmission structure comprises a rotating shaft, a shaft support structure and a bearing pack, and the shaft support structure is arranged on the outer side of the rotating shaft in a sleeving mode; 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, the inner side face and the outer side face of the self-aligning bearing are connected with the rotating shaft and the shaft support structure respectively, the first side face of the first bearing abuts against and is connected to the shaft support structure so as to bear axial force in the first direction, and the second side face of the second bearing abuts against and is connected to the shaft support structure. The second side face of the second bearing is connected to the shaft support structure in an abutting mode so as to bear the axial force in the second direction, the first direction is opposite to the second direction, the structure can bear the bidirectional load in the axial direction when the series pump is applied, meanwhile, the axial adjusting function of the rotor component can be achieved, and the service life of the rotor component is prolonged. And the stability and the bearing capacity of the shaft are ensured.

Description

TECHNICAL FIELD

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

[0002] A slurry pump is a pump designed specifically for pumping mixtures containing solid particles, known as 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 the 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 seal 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; a spiral groove is formed on the outer surface of the front section of the extension section of the water throwing ring.

[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. SUMMARY

[0005] The purpose of the present application is to overcome the above technical deficiencies, and to provide a shaft transmission structure to solve the technical problem that the pump will generate axial thrust when working, which will have a negative impact on the performance and service life of the pump.

[0006] In order to achieve the above technical purpose, the following technical scheme is adopted in the present application:

[0007] The present 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 tightly connected to the shaft support structure to bear the axial force in the first direction, the second side of the second bearing is tightly connected to the shaft support structure to bear the axial force in the second direction, wherein the first direction is opposite to the second direction.

[0008] 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 aligning bearing are connected to the rotating shaft and the bearing box body respectively.

[0009] In some embodiments, the bearing box body has a cooling cavity formed inside, the first bearing, the second bearing and the aligning bearing are all arranged in the cooling cavity, and the cooling cavity is provided with cooling liquid and a cooling member for cooling the cooling liquid.

[0010] In some embodiments, the cooling member comprises a cooling pipe arranged inside the cooling cavity and having two ends respectively communicated with a water inlet and a water outlet arranged on one side of the bearing box body.

[0011] In some embodiments, the cooling pipe is a coil pipe.

[0012] 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, the bearing box body is provided with a first protrusion on the inner side of the end close to the rear bearing gland, and the first bearing and the second bearing are arranged in sequence between the rear bearing gland and the first protrusion; 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 a position corresponding to the first bearing and the second bearing, 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.

[0013] In some embodiments, 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 provided with a second protrusion on the inner side of the end close to the front bearing gland, and the 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 pressing ring is arranged on the upper side of the bearing box body at a position corresponding to the aligning bearing, 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.

[0014] In some embodiments, the first bearing is a thrust roller bearing.

[0015] In some embodiments, the second bearing is a single rib cylindrical roller bearing.

[0016] In some embodiments, the aligning bearing is a cylindrical roller bearing.

[0017] Compared with the prior art, the shafting transmission structure provided by the application is provided with three bearings, necessary radial support is provided through the aligning bearing and a certain degree of angular adjustment is allowed, the first bearing and the second bearing bear axial forces 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 through the first bearing on one side, and the axial force of the axial load to the left is offset through the second bearing on the other side, so that the structure can bear the bidirectional axial load in the series pump application, axial adjustment of the rotor component can be realized at the same time, and the stability and carrying capacity of the shaft are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall three-dimensional structure schematic diagram of the shafting transmission structure provided by the embodiment of the application;

[0019] Figure 2 is the overall front view cross-sectional structure schematic diagram of the shafting transmission structure provided by the embodiment of the application;

[0020] Figure 3 is the rear view structure schematic diagram of the shafting transmission structure provided by the embodiment of the application;

[0021] Figure 4 is the structure schematic diagram of the cooling pipe of the shafting transmission structure provided by the embodiment of the application.

[0022] BRIEF DESCRIPTION OF DRAWINGS:

[0023] 1, rotating shaft;

[0024] 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;

[0025] 3, bearing set; 31, first bearing; 32, second bearing; 33, aligning bearing. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the application more clear and understandable, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0027] 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 application provides a shafting transmission structure, which can bear the bidirectional axial load in the series pump application, axial adjustment of the rotor component can be realized at the same time, and the stability and carrying capacity of the shaft are ensured.

[0028] Referring to Figure 1 and Figure 2 , the shaft transmission structure comprises 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 comprises 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 to the rotating shaft 1 and the shaft support structure 2 respectively, the first side of the first bearing 31 is tightly 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 tightly 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.

[0029] In the scheme, the bearing set 3 comprises 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 force in the first direction and the second direction is 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 bear the bidirectional load along the axial direction when the tandem pump is applied, the axial adjustment function of the rotor component can be realized at the same time, and the stability and reliability of the shaft are ensured.

[0030] Referring to Figure 1 and Figure 2 , in order to realize the connection and support of the rotating shaft 1, in the embodiment, the shaft support structure 2 comprises a bracket 21 and a bearing box body 22, the bracket 21 is used for supporting and fixing 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, and the first bearing 31, the second bearing 32 and the self-aligning bearing 33 are connected to the rotating shaft 1 and the bearing box body 22 respectively.

[0031] In order to realize the stable connection of 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 far away from the impeller when the impeller is installed) is fixed by arranging a rear bearing gland 24, a rear dustproof disc 25 and a rear pressing 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 arranging a front bearing gland 27, a front dustproof disc 28, a front pressing ring 29 and a dismounting ring 210.

[0032] Specifically, referring to Figure 2The rear bearing gland 24 is arranged at the left end of the bearing box body 22, and a first protrusion is arranged at the inner side of the left end of the bearing box body 22. 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, and the limiting interval is used for mounting the first bearing 31 and the second bearing 32. The first side of the first bearing 31 is the right side, and the axial force in the first direction is the right axial force. The first bearing 31 is arranged at the left side of the first protrusion, and the outer side and the right side of the fixed ring in the first bearing 31 are in pressing fit 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 left axial force, and the left side of the second bearing 32 is in pressing fit 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, and a second protrusion is arranged at the inner side of the right end of the bearing box body 22. The aligning bearing 33 is mounted between the front bearing gland 27 and the second protrusion, is sleeved at the stepped surface of the shaft 1, and the outer ring of the aligning bearing 33 is fixed by the second protrusion and the front bearing gland 27.

[0033] Further, the rear bearing gland 24 and the shaft 1 are provided with a rear dustproof disc 25, and the front bearing gland 27 and the shaft 1 are provided with a front dustproof disc 28, so as to protect the bearings in the mechanical equipment from the invasion of external dust, water and other pollutants, and prevent the loss of lubricants (such as lubricating oil or lubricating grease).

[0034] Further, the rear pressing ring 26 is arranged at the position corresponding to the first bearing 31 and the second bearing 32 on the upper side of the bearing box body 22, and the two ends of the rear pressing ring 26 extend to the two 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 pressing ring 29 is arranged at the position corresponding to the aligning bearing 33 on the upper side of the bearing box body 22, and the two ends of the front pressing ring 29 extend to the two 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 middle parts of the front pressing ring 29 and the rear pressing ring 26 are annular to fit the upper sides of the two ends of the bearing box body 22 respectively. The two ends of the front pressing ring 29 and the rear pressing ring 26 are plate structures with threaded grooves and bolts, and can be fixedly connected with the bracket 21.

[0035] Preferably, in the 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 the implementation, the thrust roller bearing and the single-lip cylindrical roller bearing of the fixed end of the large pump bear the right and left axial forces respectively, and the cylindrical roller bearing is used for automatically adapting to the slight deflection or misalignment of the shaft, can automatically adjust to adapt to the deflection angle of the shaft, so as to reduce the additional load of the bearing.

[0036] Please refer to Figure 2 and Figure 3 , the bearing in the running process may generate heat due to various reasons, in order to achieve the cooling of the bearing, in this embodiment, the inside of the bearing box body 22 is formed with a sealed cooling cavity, the cooling cavity is provided with cooling liquid and cooling part, the cooling part is used for cooling the cooling liquid, the first bearing 31, the second bearing 32 and the aligning bearing 33 are all embedded in the cooling cavity, which can contact with the cooling liquid in the cooling cavity to cool down.

[0037] In one embodiment, the cooling part includes a cooling pipe 23, which is arranged inside the cooling cavity, and its two ends 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 realize the heat dissipation and cooling of the cooling liquid, and finally the cooling water is discharged through the water outlet 222 to realize the circulation cooling and cooling.

[0038] Further, in some embodiments, please refer to Figure 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, so that the cooling liquid can fully exchange heat with the cooling water in the cooling pipe 23.

[0039] It should be noted that in other embodiments, the cooling part is not limited to this, and the cooling part can also be a refrigeration fin and the like.

[0040] Working principle: the thrust roller bearing and the single rib cylindrical roller bearing bear the right and left axial forces 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 with the cooling liquid in the cooling cavity, the 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 realize the heat dissipation and cooling of the cooling liquid, and finally the cooling water is discharged through the water outlet 222.

[0041] The present application is provided with three bearings, the aligning bearing 33 provides necessary radial support and allows a certain degree of angular adjustment, the first bearing 31 and the second bearing 32 bear the 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 right axial force of the axial load is absorbed by the first bearing 31 on one side, and the left axial force of the axial load is offset by the second bearing 32 on the other side, so that the structure can bear the bidirectional axial load in series pump application, and the axial adjustment function of the rotor component can be realized, so as to ensure the stability and carrying capacity of the shaft.

[0042] In the description of the present 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 present 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 present application. Unless otherwise expressly specified and limited, the terms "mounting", "connection" and "connection" should be interpreted broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] 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 variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device 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 device. 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 device including the element.

[0044] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any various other corresponding changes and modifications made in accordance with the technical concept of the present application shall be included in the scope of protection of the claims of the present application.

Claims

1. A shaft transmission structure, characterized in that, include: Shaft; A shaft support structure, wherein the shaft support structure is sleeved on the outside of the rotating shaft; as well as, A bearing assembly, comprising a first bearing, a second bearing, and a self-aligning bearing disposed between the rotating shaft and the shaft support structure, wherein the inner and outer sides of the self-aligning bearing are respectively connected to the rotating shaft and the shaft support structure, the first side of the first bearing is abutted against the shaft support structure to withstand axial force in a first direction, and the second side of the second bearing is abutted against the shaft support structure to withstand axial force in a second direction, wherein the first direction and the second direction are opposite in direction; The shaft support structure includes a bearing housing; a cooling chamber is formed inside the bearing housing, in which the first bearing, the second bearing, and the self-aligning bearing are all housed. The cooling chamber contains coolant and a cooling component, which is used to cool the coolant. The cooling component includes a cooling pipe disposed inside the cooling chamber, with its two ends connected to an inlet and an outlet located on one side of the bearing housing, respectively. The cooling pipe is a coil.

2. The shaft transmission structure according to claim 1, characterized in that, The shaft support structure also includes a bracket, the bearing housing 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 respectively connected to the rotating shaft and the bearing housing.

3. The shaft transmission structure according to claim 2, characterized in that, The shaft support structure also includes a rear bearing cap, a rear dust cover, and a rear pressure ring. The rear bearing cover is disposed at one end of the bearing housing, and a first protrusion is provided on the inner side of the bearing housing near the rear bearing cover. The first bearing and the second bearing are sequentially disposed between the rear bearing cover and the first protrusion. A rear dustproof disc is provided between the rear bearing cover and the rotating shaft; The rear pressure ring is located on the upper side of the bearing housing, corresponding to the first bearing and the second bearing. Both ends of the ring extend along the outer wall of the bearing housing to both sides of the bearing housing and are connected to the bracket.

4. The shaft transmission structure according to claim 3, characterized in that, The shaft support structure also includes a front bearing cover, a front dust cover, a front pressure ring, and a disassembly ring. The front bearing cap is disposed at the other end of the bearing housing, and a second protrusion is provided on the inner side of the bearing housing near the front bearing cap. The self-aligning bearing is disposed between the front bearing cap and the second protrusion. A front dustproof disc is provided between the front bearing cover and the rotating shaft; The front pressure ring is located on the upper side of the bearing housing, corresponding to the self-aligning bearing. Both ends of the ring extend along the outer wall of the bearing housing to both sides of the bearing housing and are connected to the bracket.

5. The shaft transmission structure according to claim 1, characterized in that, The first bearing is a thrust roller bearing.

6. The shaft transmission structure according to claim 1, characterized in that, The second bearing is a single-sided cylindrical roller bearing.

7. The shaft transmission structure according to claim 1, characterized in that, The self-aligning bearing is a cylindrical roller bearing.

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