Rolling mill emulsion intermediate transfer fluid down pump

Abstract

The utility model relates to a transfer pump technical field especially is related to a rolling mill emulsion intermediate transfer liquid down pump, including scroll case, the scroll case has liquid inlet and discharge port, impeller, the impeller is located in the scroll case, and the impeller is connected through the impeller shaft with power component, the protection pipe, the protection pipe sets up in the impeller shaft out, the protection pipe with the impeller shaft between through support component connects, cooling component, cooling component one end is connected with the discharge port, cooling component other end is connected with the support component, the utility model is favorable to reduce transmission shaft wear or lock, improve the normal working performance and life of transfer liquid down pump.

Description

Technical Field

[0001] This utility model relates to the field of transfer pump technology, and in particular to a submersible pump for intermediate transfer of rolling mill emulsion. Background Technology

[0002] In the rolling mill emulsion system, the intermediate transfer submersible pump is a key piece of equipment in the emulsion circulation, filtration and recovery process. It is mainly used to transport the used emulsion from the collection tank or intermediate processing unit to the filtration system or return tank.

[0003] After being cooled and lubricated by the rollers, the emulsion is collected in a collection tank below the frame and then pumped by a submersible pump to the filtration system or intermediate treatment unit, ultimately returning to the clean oil tank for recycling. Because the emulsion has a certain viscosity and contains solid particles, the submersible pump operates at high power output when the ambient temperature is low. This increases the friction between the drive shaft and its support components, leading to excessively high local temperatures. Prolonged operation can cause severe wear or jamming of the drive shaft, significantly affecting the normal operating performance and service life of the submersible pump.

[0004] Therefore, those skilled in the art are dedicated to developing an intermediate transfer submersible pump for rolling mill emulsions to reduce wear or jamming of the drive shaft and improve the normal operating performance and service life of the transfer submersible pump. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a submerged pump for intermediate transfer of emulsion in rolling mills, which reduces wear or jamming of the drive shaft and improves the normal working performance and service life of the submerged pump.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A submersible pump for intermediate transfer of rolling mill emulsion, comprising:

[0008] A vortex housing having a liquid inlet and a liquid outlet;

[0009] An impeller, located within the volute, is connected to a power assembly via an impeller shaft;

[0010] A protective tube is disposed outside the impeller shaft, and the protective tube and the impeller shaft are connected by a support assembly;

[0011] A cooling assembly, one end of which is connected to the drain port and the other end of which is connected to the support assembly.

[0012] The beneficial effects of adopting the above scheme are as follows: the emulsion discharged from the drain port has a certain pressure, and it is used as a cooling medium to be input to the support component through the cooling component. This can remove the heat generated by the support component during operation, and at the same time, it can lubricate the support component, avoiding the accelerated aging and damage of the drive shaft and related components due to excessive local temperature, thus extending the service life of the submersible pump. Moreover, after completing the cooling task, the emulsion can continue to participate in the circulation without the need to add additional cooling medium. This ensures the efficient operation of the emulsion circulation system and avoids compatibility problems that may be caused by adding other media.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, an intermediate shaft is provided between the impeller shaft and the power assembly, and the intermediate shaft is connected to the protective tube through a support assembly.

[0015] The beneficial effects of adopting the above-mentioned further solution are: by setting an intermediate shaft between the impeller shaft and the power assembly, the impeller shaft is subjected to more uniform force, reducing the vibration and impact caused by direct connection to the power assembly, thereby improving the stability of the entire shaft system. At the same time, by selecting intermediate shafts of different lengths according to actual needs, the overall length of the submersible pump can be changed, which is beneficial for installation in different positions.

[0016] Furthermore, the support assembly includes a guide bearing, a guide bearing body, and a guide bearing cover. The inner wall of the guide bearing abuts against the impeller shaft or intermediate shaft. The guide bearing body is disposed outside the guide bearing and is connected to the inner wall of the protective tube. The upper end of the guide bearing body is also provided with the guide bearing cover for pressing the guide bearing.

[0017] The beneficial effects of adopting the above-mentioned further solutions are: the inner wall of the guide bearing abuts against the impeller shaft or intermediate shaft, which can provide stable radial support, prevent excessive shaft oscillation, ensure the straightness of the shaft system during operation, and improve rotational accuracy;

[0018] The guide bearing body is connected to the inner wall of the protective tube, forming a relatively closed space that effectively prevents external impurities and liquids from entering the bearing area, protecting the guide bearing from contamination.

[0019] Furthermore, the cooling assembly includes a cooling pipe, one end of which is connected to the drain port, and the other end of which is connected to a cooling branch pipe via a tee. The cooling branch pipe passes through the protective pipe and the guide bearing body so that its end faces the guide bearing.

[0020] A filter is also installed at the end of the cooling pipe.

[0021] The beneficial effects of adopting the above-mentioned further solution are: the cooling branch pipe passes through the protective pipe and the guide bearing body, so that the cooling medium can directly act on the key parts near the guide bearing, accurately cool the guide bearing and the surrounding area, effectively reduce the heat generated by friction, prevent the guide bearing from being damaged due to overheating, and at the same time, the emulsion can lubricate the guide bearing.

[0022] Furthermore, the lower end of the impeller shaft passes through the middle of the impeller and is connected to a locking nut, the locking nut being rotated in the opposite direction to the impeller shaft.

[0023] The beneficial effects of adopting the above-mentioned further solution are: the lower end of the impeller shaft is connected to the locking nut, and the direction of rotation of the locking nut is opposite to the direction of rotation of the impeller shaft. The reaction force generated by the rotation of the impeller shaft can be used to further tighten the locking nut, effectively preventing the impeller from loosening due to vibration and other factors during high-speed rotation, and ensuring that the connection between the impeller and the impeller shaft is firm and reliable.

[0024] Furthermore, the upper end of the protective tube is connected to a base plate, the upper end of the base plate is equipped with a motor bracket, a bearing seat is installed inside the motor bracket, the lower end of the bearing seat is connected to the base plate, a support bearing is installed inside the bearing seat, and a bearing cover and a dust cover are also installed on the upper end of the bearing seat.

[0025] The beneficial effects of adopting the above-mentioned further solutions are: the support bearing installed in the bearing housing can accurately support the impeller shaft and ensure the rotational accuracy of the impeller shaft. At the same time, the connection between the bearing housing and the base plate and the setting of the bearing cover further enhance the rigidity of the support system and improve the smooth operation of the submersible pump.

[0026] Furthermore, the intermediate shaft is connected to the output end of the power assembly via a flexible coupling.

[0027] The beneficial effects of adopting the above-mentioned further solutions are: the flexible coupling has a certain displacement compensation capability, which can compensate for the slight coaxiality deviation that may occur between the intermediate shaft and the output end of the power component during installation, ensure the smoothness of power transmission, and reduce the risk of equipment failure caused by installation errors.

[0028] Furthermore, a filter screen is also installed at the lower end of the vortex shell.

[0029] The beneficial effects of adopting the above-mentioned further solution are: the filter screen installed at the lower end of the volute can perform preliminary filtration of the emulsion entering the submersible pump, intercept larger impurity particles, prevent impurities from entering the pump and causing wear and damage to key components such as the impeller and shaft system, and extend the service life of the submersible pump.

[0030] Furthermore, the guide bearing body is a spiral guide bearing.

[0031] The beneficial effects of adopting the above-mentioned further solution are: the spiral guide bearing can reduce wear and increase service life. At the same time, it facilitates the continuous flow of coolant transported by the cooling branch pipe along the direction of the spiral groove, thereby smoothly discharging it from the spiral groove, improving the coolant flow efficiency, and avoiding excessive temperature or bearing failure. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the intermediate transfer pump structure of the rolling mill emulsion according to a specific embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the guide bearing structure of a specific embodiment of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Volute; 2. Inlet; 3. Outlet; 4. Impeller; 5. Impeller shaft; 6. Power assembly; 7. Protective pipe; 8. Support assembly; 9. Cooling assembly; 10. Intermediate shaft; 11. Guide bearing; 12. Guide bearing body; 13. Guide bearing cover; 14. Cooling pipe; 15. Cooling branch pipe; 16. Filter; 17. Locking nut; 18. Base plate; 19. Motor bracket; 20. Bearing housing; 21. Support bearing; 22. Bearing cover; 23. Flexible coupling; 24. Filter screen. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] like Figure 1 and Figure 2 As shown, a submersible pump for intermediate transfer of rolling mill emulsion includes...

[0041] The volute housing 1 has an inlet 2 and an outlet 3. The emulsion flows in through the inlet 2, forming a stable flow path within the volute housing 1, and then exits through the outlet 3, being discharged to a designated location via a drain pipe. A filter screen 24, made of stainless steel, is also installed at the lower end of the volute housing 1. This filter screen 24 has high filtration accuracy and strength, effectively filtering impurities in the emulsion, preventing large particles from entering the submersible pump, reducing wear and clogging of internal components, and extending the pump's service life.

[0042] Impeller 4 is located inside the vortex shell 1 and is connected to the power assembly 6 via impeller shaft 5. Impeller 4 can be an open impeller to reduce the influence of particulate impurities. When the power assembly 6 drives the impeller 4 to rotate, it uses the principle of centrifugal force to draw the emulsion from the inlet 2 and accelerates it along the curved trajectory of the blades to the periphery of the vortex shell 1, thereby realizing the pressurization and transportation of the emulsion.

[0043] The protective tube 7 is installed outside the impeller shaft 5 and plays a role in protecting and supporting the impeller shaft 5. The protective tube 7 and the impeller shaft 5 are connected by the support assembly 8. The support assembly 8 provides radial and axial stable support for the impeller shaft 5, disperses the load on the impeller shaft 5, ensures the straightness and stability of the impeller shaft 5 when rotating at high speed, and reduces the risk of shaft vibration and deformation.

[0044] Cooling component 9 is connected at one end to drain port 3. It uses the emulsion with a certain pressure discharged from drain port 3 as a cooling and lubricating medium. The other end of cooling component 9 is connected to support component 8. The cooling medium effectively reduces the heat generated by friction in support component 8 during operation and lubricates the moving parts of support component 8 to prevent damage to components caused by local overheating.

[0045] An intermediate shaft 10 is also provided between the impeller shaft 5 and the power assembly 6. In a specific embodiment, multiple intermediate shafts 10 can be installed between the impeller shaft 5 and the power assembly 6, and the overall length of the submersible pump can be adjusted by selecting different lengths of the intermediate shafts 10. The intermediate shaft 10 is connected to the protective tube 7 through a support assembly 8, and the intermediate shaft 10 is connected to the output end of the power assembly 6 through a flexible coupling 23. The flexible coupling 23 can compensate for the slight coaxiality deviation between the two shafts, and at the same time has a certain shock absorption and buffering effect, effectively absorbing the vibration energy in the power transmission and reducing the impact of vibration on the overall performance of the submersible pump.

[0046] like Figure 1 In some embodiments, the support assembly 8 includes a guide bearing 11, a guide bearing body 12, and a guide bearing cap 13. The inner wall of the guide bearing 11 abuts against the impeller shaft 5 or the intermediate shaft 10, closely fitting the surface of the shaft to provide precise radial support for the shaft. The guide bearing body 12 is provided outside the guide bearing 11. In a specific embodiment, the guide bearing body 12 has a mounting cavity, the guide bearing 11 is installed in the mounting cavity, and the guide bearing body 12 is connected to the inner wall of the protective tube 7. The upper end of the guide bearing body 12 is also provided with a guide bearing cap 13 for pressing the guide bearing 11 tightly. The guide bearing cap 13 prevents the guide bearing 11 from shifting during operation.

[0047] like Figure 2 As shown in the specific embodiment, the guide bearing body 12 is a helical guide bearing. The helical guide bearing has helical grooves throughout. The helical shape of these grooves effectively guides the flow of coolant. The coolant continuously moves along the direction of the helical grooves, thus smoothly exiting from the grooves and preventing coolant stagnation or accumulation inside the bearing. Compared to traditional guide bearings, the helical guide bearing can more quickly remove coolant from the friction area, thereby improving coolant flow efficiency and effectively reducing wear, thus increasing service life.

[0048] The cooling assembly 9 includes a cooling pipe 14, one end of which is connected to a drain port 3. The emulsion pressure at the drain port 3 is used to deliver the cooling medium into the cooling pipe 14. The other end of the cooling pipe 14 is connected to a cooling branch pipe 15 via a tee. The tee facilitates the even distribution of the cooling medium to each cooling branch pipe 15, enabling simultaneous cooling of multiple support assemblies 8. The cooling branch pipe 15 passes through the protective pipe 7 and the guide bearing body 12, with its end facing the guide bearing 11. It directly sprays the cooling medium onto the working surface of the guide bearing 11, carrying away the heat generated during operation, effectively reducing the temperature of the guide bearing 11, and facilitating emulsion lubrication of the guide bearing 11. A filter 16 is also installed at the end of the cooling pipe 14. The filter 16 has a built-in fine filter element, which further filters out minute impurities in the cooling medium, preventing impurities from entering the cooling system, clogging the cooling pipes, or scratching the surface of the guide bearing 11, ensuring the long-term stable operation of the cooling system and the reliability of the cooling effect.

[0049] The lower end of the impeller shaft 5 passes through the middle of the impeller 4 and is connected to the locking nut 17. The locking nut 17 is made of corrosion-resistant high-strength alloy steel, which has excellent fatigue resistance and anti-loosening performance. The rotation direction of the locking nut 17 is opposite to the rotation direction of the impeller shaft 5. Utilizing the rotational power of the impeller shaft 5, the reaction torque generated when the impeller shaft 5 rotates will automatically tighten the locking nut 17, preventing the impeller 4 from loosening due to vibration and other factors during high-speed rotation.

[0050] The upper end of the protective tube 7 is connected to a base plate 18, which is made of thick steel plate and is mainly used to install the submersible pump. A motor bracket 19 is installed on the upper end of the base plate 18, and a bearing housing 20 is installed inside the motor bracket 19. The lower end of the bearing housing 20 is connected to the base plate 18, and a support bearing 21 is installed inside the bearing housing 20. The support bearing 21 uses a high-precision deep groove ball bearing or cylindrical roller bearing, capable of withstanding large radial loads and a certain axial load, providing reliable rotational support for the impeller shaft 5 and ensuring the rotational accuracy and stability of the impeller shaft 5. A bearing cover 22 and a dust cover are also installed on the upper end of the bearing housing 20. The bearing cover 22 is connected to the bearing housing 20 by bolts, axially fixing and protecting the support bearing 21, preventing external dust, moisture, and other impurities from entering the bearing, and preventing lubricating grease leakage, ensuring good lubrication of the support bearing 21. The dust cover is made of oil-resistant and wear-resistant rubber material, which can effectively block the intrusion of external impurities and liquids, further improving the protection performance and service life of the support bearing 21, and reducing the maintenance cost and failure rate of the submersible pump.

[0051] In other embodiments, in order to increase the head of the submersible pump, the impeller 4 is replaced with a multi-stage impeller structure. Specifically, the multi-stage impeller structure includes multiple impellers connected in series, with each impeller connected by a connecting shaft. The inlet of the first-stage impeller is connected to the liquid inlet 2 of the volute 1, and the outlet of the last-stage impeller is connected to the liquid outlet 3 of the volute 1. Adjacent impellers 4 are connected by a guide pipe. The function of the guide pipe is to guide the emulsion from one impeller 4 to the next, reducing the energy loss of the emulsion during the flow process.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A submersible pump for intermediate transfer of emulsion in a rolling mill, characterized in that: include A vortex shell (1) having a liquid inlet (2) and a liquid outlet (3); Impeller (4), the impeller (4) is located inside the vortex housing (1), and the impeller (4) is connected to the power assembly (6) through the impeller shaft (5); A protective tube (7) is disposed outside the impeller shaft (5), and the protective tube (7) and the impeller shaft (5) are connected by a support assembly (8); Cooling component (9), one end of which is connected to the drain port (3), and the other end of which is connected to the support component (8).

2. The intermediate transfer submersible pump for rolling mill emulsion according to claim 1, characterized in that: An intermediate shaft (10) is also provided between the impeller shaft (5) and the power assembly (6), and the intermediate shaft (10) is connected to the protective tube (7) through a support assembly (8).

3. The intermediate transfer pump for rolling mill emulsion according to claim 2, characterized in that: The support assembly (8) includes a guide bearing (11), a guide bearing body (12), and a guide bearing cover (13). The inner wall of the guide bearing (11) abuts against the impeller shaft (5) or the intermediate shaft (10). The guide bearing body (12) is provided outside the guide bearing (11), and the guide bearing body (12) is connected to the inner wall of the protective tube (7). The upper end of the guide bearing body (12) is also provided with the guide bearing cover (13) for pressing the guide bearing (11).

4. The intermediate transfer submersible pump for rolling mill emulsion according to claim 3, characterized in that: The cooling assembly (9) includes a cooling pipe (14), one end of which is connected to the drain port (3), and the other end of which is connected to a cooling branch pipe (15) via a tee. The cooling branch pipe (15) passes through the protective pipe (7) and the guide bearing body (12) with its end facing the guide bearing (11). A filter (16) is also installed at the end of the cooling pipe (14).

5. The intermediate transfer pump for rolling mill emulsion according to claim 1, characterized in that: The lower end of the impeller shaft (5) passes through the middle of the impeller (4) and is connected to the locking nut (17), the direction of rotation of the locking nut (17) being opposite to the direction of rotation of the impeller shaft (5).

6. The intermediate transfer submersible pump for rolling mill emulsion according to claim 1, characterized in that: The upper end of the protective tube (7) is connected to a base plate (18), and a motor bracket (19) is installed on the upper end of the base plate (18). A bearing seat (20) is installed inside the motor bracket (19). The lower end of the bearing seat (20) is connected to the base plate (18). A support bearing (21) is installed inside the bearing seat (20). A bearing cover (22) and a dust cover are also installed on the upper end of the bearing seat (20).

7. The intermediate transfer submersible pump for rolling mill emulsion according to claim 2, characterized in that: The intermediate shaft (10) is connected to the output end of the power assembly (6) via a flexible coupling (23).

8. The intermediate transfer pump for rolling mill emulsion according to claim 1, characterized in that: A filter screen (24) is also installed at the lower end of the vortex shell (1).

9. The intermediate transfer submersible pump for rolling mill emulsion according to claim 3, characterized in that: The guide bearing body (12) is a spiral guide bearing.

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