Connecting shaft supporting structure of high-temperature submerged pump

Abstract

The utility model discloses a connecting shaft supporting structure of a high-temperature submerged pump, which is characterized in that a sliding bearing is connected and matched with a guide bearing of a sleeve coupling, and the sliding bearing and the sleeve coupling are combined and mounted on a butt joint shaft end of a first shaft and a second shaft, so that a shaft sleeve is not required to be independently arranged to be connected with the sliding bearing, and the processing and mounting procedures are simplified; meanwhile, only one-time centering process needs to be carried out, so that the sliding bearing and the sleeve coupling work cooperatively, the shaft centering performance is improved, and the stability and reliability of the high-temperature submerged pump are guaranteed; furthermore, a spiral groove is formed in the inner side of the guide bearing, so that the sliding bearing is combined with the sleeve coupling, the complexity of a lubricating medium path can be effectively reduced, the lubricating medium can more smoothly reach the working areas of the sliding bearing and the sleeve coupling, the lubricating effect is improved, and the abrasion of the sliding bearing is reduced; meanwhile, heat can be more evenly distributed between the sliding bearing and the sleeve coupling, and the risk of local overheating is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible pumps, in particular to a shaft support structure of a high-temperature submersible pump. Background Art

[0002] High-temperature submersible pumps are designed for high-temperature applications, transporting various high-temperature media such as molten salts, liquid metals, and organic and inorganic compounds. Sliding bearings and sleeve couplings typically work together to ensure proper shaft alignment. Sliding bearings support the rotating shaft and provide the necessary guidance and centering, while the sleeve coupling further maintains the alignment of the two shafts through its internal fit.

[0003] like Figure 1 As shown, most existing high-temperature submersible pumps use independently distributed sliding bearings 1' and sleeve couplings 2'. The sleeve coupling 2' is used to connect two segmented long shafts 3', and the sliding bearing 1' is set on one of the segmented long shafts 3' through a sleeve 11'.

[0004] When the sliding bearing and sleeve coupling are independently distributed, each component is individually aligned to the shaft, resulting in two independent alignment processes. This not only complicates the processing process but also increases the risk of inaccurate alignment. This can be easily reduced due to factors such as installation errors and thermal expansion, which can cause vibration and noise, affecting the stability and reliability of the high-temperature submersible pump. Furthermore, the sliding bearing relies on a lubricating film to reduce friction and wear. However, this lubricating film may not be effectively delivered to the sliding bearing, leading to increased bearing wear, poor lubrication, and uneven temperatures. This can cause a decrease in parameters such as the flow rate and head of the high-temperature submersible pump, shortening the pump's service life.

[0005] Therefore, how to effectively improve the processing and assembly efficiency of high-temperature submersible pumps, improve the centering of the shaft, and reduce the wear of the sliding bearings has become an urgent problem to be solved in this field. Utility Model Content

[0006] In view of the defects of the prior art, the purpose of the present invention is to provide a high-temperature submersible pump shaft support structure with high processing and assembly efficiency, good shaft alignment, and reduced wear of sliding bearings.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a high-temperature submersible pump shaft support structure, including a sleeve coupling and a sliding bearing, the sleeve coupling includes a guide bearing and a ferrule, the ferrule is respectively connected to the butt ends of the first shaft and the second shaft, the guide bearing is sleeved on the butt ends of the shaft,

[0008] The sliding bearing is sleeved on the guide bearing of the sleeve coupling, and the outer side of the sliding bearing is fixedly connected to the first protective tube and the second protective tube through a sliding bearing seat.

[0009] A spiral groove is provided on the inner side of the guide bearing.

[0010] Furthermore, the guide bearing is respectively connected to the first shaft and the second shaft through a key.

[0011] Furthermore, the guide bearing is connected to the first shaft or the second shaft via a first screw to axially position the sleeve coupling.

[0012] Furthermore, the sliding bearing is axially positioned with the sliding bearing seat by a second screw.

[0013] Furthermore, the sliding bearing seat is fixedly connected to the first protective tube and the second protective tube respectively through studs.

[0014] Furthermore, the spiral groove is configured to have a trapezoidal cross section.

[0015] Furthermore, two evenly distributed and continuous spiral grooves are provided on the inner side of the guide bearing.

[0016] The high-temperature submersible pump shaft support structure provided by the utility model connects and cooperates the sliding bearing with the guide bearing of the sleeve coupling, and the sliding bearing and the sleeve coupling are combined and installed on the docking shaft ends of the first shaft and the second shaft. There is no need to separately set a shaft sleeve to connect with the sliding bearing, which simplifies the processing and installation process and improves assembly efficiency. At the same time, only one centering process is required, so that the sliding bearing and the sleeve coupling work together to provide accurate centering, thereby improving the shaft centering and ensuring the stability and reliability of the high-temperature submersible pump.

[0017] Furthermore, a spiral groove is provided on the inner side of the guide bearing to increase the lubrication oil path and heat dissipation area, so that the sliding bearing and the sleeve coupling are combined into one, which can effectively reduce the complexity of the lubrication medium path, and the lubrication medium can reach the working area of ​​the sliding bearing and the sleeve coupling more smoothly, thereby improving the lubrication effect and reducing the wear of the sliding bearing.

[0018] At the same time, it can also distribute heat more evenly between the sliding bearing and the sleeve coupling, reducing the risk of local overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the shaft support structure of an existing high-temperature submersible pump;

[0021] Figure 2 This is a schematic diagram of the high-temperature submerged pump shaft support structure provided by the utility model;

[0022] Figure 3 This is a structural diagram of the guide bearing of the utility model.

[0023] Reference numerals:

[0024] 1. Sleeve coupling; 11. Guide bearing; 111. Spiral groove; 12. Cardan; 13. First screw;

[0025] 2. Sliding bearing; 21. Second screw; 22. Sliding bearing seat; 23. Stud;

[0026] 3. First shaft; 31. Key; 4. Second shaft; 5. Connecting shaft end; 6. First protective tube; 7. Second protective tube. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0028] Example 1

[0029] See also Figure 2 , which shows an example of a high-temperature submersible pump shaft support structure provided by the present invention.

[0030] As can be seen from the figure, the high-temperature submersible pump shaft support structure of this example mainly includes a sleeve coupling 1 and a sliding bearing 2.

[0031] The sleeve coupling 1 includes a guide bearing 11 and a ferrule 12. The ferrule 12 is respectively connected to the butt joint shaft ends 5 of the first shaft 3 and the second shaft 4. The guide bearing 11 is sleeved on the butt joint shaft ends 5. The sliding bearing 2 is sleeved on the guide bearing 11 of the sleeve coupling 1. The outer sides of the sliding bearing 2 are respectively fixedly connected to the first protective tube 6 and the second protective tube 7 through the sliding bearing seat 21, so that the independently distributed sleeve coupling 1 and the sliding bearing 2 are combined into one installation, which improves the processing and installation efficiency, and improves the shaft alignment, lubrication effect and heat uniformity, thereby ensuring the stability and reliability of the high-temperature submersible pump.

[0032] Among them, the clamping sleeve 12 of the sleeve coupling 1 is configured as a half-split structure, which is respectively clamped on the docking shaft ends 5 of the first shaft 3 and the second shaft 4 to position and connect the first shaft 3 and the second shaft 4, and the guide bearing 11 is sleeved on the docking shaft ends 5 to tightly clamp the first shaft 3 and the second shaft 4 to ensure the connection stability of the sleeve coupling 1 and the first shaft 3 and the second shaft 4.

[0033] Furthermore, keys 31 are respectively provided on the mating shaft end 5 areas of the first shaft 3 and the second shaft 4, so that the guide bearing 11 can be connected to the first shaft 3 and the second shaft 4 respectively through the key 31, ensuring that the guide bearing 11 can cooperate with the key 31 to stably transmit torque to the first shaft 3 and the second shaft 4.

[0034] At the same time, the guide bearing 11 is connected to the first shaft 3 or the second shaft 4 through the first screw 13 to axially position the sleeve coupling 1.

[0035] In order to enable the sleeve coupling 1 to be integrated with the sliding bearing 2 and arranged in a high-temperature submersible pump, the sliding bearing 2 is directly sleeved on the guide bearing 11 of the sleeve coupling 1 and shares a guide bearing with the sleeve coupling 1. There is no need to separately install a sleeve that matches the sliding bearing 2, thereby reducing the number of pump parts and improving assembly efficiency. At the same time, the sleeve coupling 1 can be combined with the sliding bearing 2 and arranged on the docking shaft end 5.

[0036] Therefore, the sleeve coupling 1 and the sliding bearing 2 only need to be aligned once when installed together, which greatly reduces the risk of alignment error and can effectively ensure the reliability and stability of the high-temperature submersible pump.

[0037] Furthermore, the outer side of the sliding bearing 2 is connected to the sliding bearing seat 22 by a second screw 21 and is axially positioned with the sliding bearing seat 22. At the same time, the sliding bearing seat 22 is fixedly connected to the first protective tube 6 and the second protective tube 7 by the stud 23, so that the sliding bearing seat 22 stably supports the sliding bearing 2 and fixes the sliding bearing 2 on the guide bearing 11 of the sleeve coupling 1, thereby ensuring the connection stability between the sleeve coupling 1 and the sliding bearing 2.

[0038] Therefore, the sleeve coupling 1 and the sliding bearing 2 are respectively coordinated with the first screw 13, the second screw 21 and the stud 23 to achieve axial positioning with the docking shaft end 5, so as to ensure the axial positioning connection between the sleeve coupling 1 and the sliding bearing 2, so that the sleeve coupling 1 and the sliding bearing 2 can cooperate to ensure the concentricity of the shaft.

[0039] Furthermore, the sleeve coupling 1 can be combined with the sliding bearing 2 and arranged on the docking shaft end 5, and can cooperate with each other to support the docking shaft end 5, ensuring the docking stability of the first shaft 3 and the second shaft 4, and at the same time making the bearing support structure of the high-temperature submersible pump directly act on the connection between the two shafts, which is beneficial to the safety, reliability and stability of the shaft connection.

[0040] At the same time, the sleeve coupling 1 and the sliding bearing 2 are arranged in the same position, which reduces the complexity of the lubricating medium path, so that the lubricating medium can reach the working area of ​​the sleeve coupling 1 and the sliding bearing 2 more smoothly. Compared with the traditional independent distribution structure, the integrated structure can effectively and quickly transport the lubricating medium, improve the lubrication effect, and reduce the wear of the sliding bearing 2.

[0041] Furthermore, the combination of the sleeve coupling 1 and the sliding bearing 2 can distribute heat more evenly between the sleeve coupling 1 and the sliding bearing 2, thereby reducing the risk of local overheating and improving the overall performance of the high-temperature submersible pump.

[0042] Example 2

[0043] Combine Figure 3 On the basis of the first embodiment, in order to further improve the lubrication and heat conduction effects of the combination of the sleeve coupling 1 and the sliding bearing 2, a spiral groove 111 is provided on the inner side of the guide bearing 11 of the sleeve coupling 1, so that the lubricating medium enters the spiral groove 111 on the inner side of the guide bearing 11. The spiral groove 111 can guide the lubricating medium to flow in a spiral manner, thereby increasing the flow speed of the lubricating medium to form a more uniform oil film and reduce the friction of the guide bearing 11.

[0044] Furthermore, the spiral groove 111 is configured with a trapezoidal cross-section, which can more effectively fix the lubricating medium, prevent the lubricating medium from leaking prematurely or gathering in large quantities on one side of the bearing 11, thereby improving the lubrication effect. At the same time, the lubricating medium circulates inside the spiral groove 11, and can also avoid the retention of impurities in the lubricating medium, thereby ensuring the normal operation of the sleeve coupling 1 and the sliding bearing 2.

[0045] At the same time, the spiral grooves 111 are evenly distributed on the working surface of the guide bearing 11, which can effectively increase the heat dissipation area, so that the medium in the high-temperature submersible pump flows through the spiral grooves 111, uniformly dissipating heat to the sleeve coupling 1 and the sliding bearing 2, thereby improving heat dissipation uniformity and heat dissipation efficiency.

[0046] Preferably, two evenly distributed and continuous spiral grooves 111 are provided on the inner side of the guide bearing 11 to increase the lubrication flow channel and heat dissipation area, thereby ensuring the lubrication effect and heat dissipation uniformity.

[0047] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature submersible pump shaft support structure, comprising a sleeve coupling and a sliding bearing, wherein the sleeve coupling comprises a guide bearing and a ferrule, wherein the ferrule connects the butt ends of a first shaft and a second shaft, respectively, and the guide bearing is sleeved on the butt ends of the shaft, characterized in that: The sliding bearing is sleeved on the guide bearing of the sleeve coupling, and the outer side of the sliding bearing is fixedly connected to the first protective tube and the second protective tube through a sliding bearing seat. A spiral groove is provided on the inner side of the guide bearing.

2. The high-temperature submersible pump shaft support structure according to claim 1, characterized in that: The guide bearings are respectively connected to the first shaft and the second shaft through keys.

3. The high-temperature submersible pump shaft support structure according to claim 2, characterized in that: The guide bearing is connected to the first shaft or the second shaft via a first screw to axially position the sleeve coupling.

4. The high-temperature submersible pump shaft support structure according to claim 1, characterized in that: The sliding bearing is axially positioned with respect to the sliding bearing seat by a second screw.

5. The high-temperature submersible pump shaft support structure according to claim 1, characterized in that: The sliding bearing seat is fixedly connected to the first protective tube and the second protective tube respectively through studs.

6. The high-temperature submersible pump shaft support structure according to claim 1, characterized in that: The spiral groove is configured to have a trapezoidal cross section.

7. The high-temperature submersible pump shaft support structure according to claim 6, characterized in that: Two evenly distributed and continuous spiral grooves are provided on the inner side of the guide bearing.

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