High-efficiency energy-saving double-suction centrifugal pump

Abstract

This invention discloses a high-efficiency and energy-saving double-suction centrifugal pump, comprising an upper pump casing, a lower pump casing, and a drive shaft. An impeller is mounted on the drive shaft. The upper pump casing has an arc-shaped flow channel inside. It also includes a drive unit for rotating the drive shaft. The drive unit includes a base plate, a drive component, a reduction mechanism, a hydraulic assembly, and a rotating assembly. The drive component is mounted on the base plate, and the reduction mechanism is mounted on the output end of the drive component. In this invention, the rotating assembly is disposed within the flow channel of the centrifugal pump. The drive component drives the hydraulic assembly, causing the rotating assembly to move within the flow channel. Simultaneously, the flow of the medium can drive the rotating assembly to rotate. The rotating assembly contacts the inner wall of the flow channel, scraping away impurities adhering to the inner wall, thereby reducing impurities and keeping the flow channel clean, thus ensuring the flow rate and stability of the medium.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, and in particular to a high-efficiency and energy-saving double-suction centrifugal pump. Background Technology

[0002] Centrifugal pumps are generally driven by an electric motor. When the impeller rotates at high speed, it drives the liquid between the blades to rotate. Due to centrifugal force, the liquid is thrown from the center of the impeller to the outer edge, increasing its kinetic energy. After entering the pump casing, the flow channel in the volute-shaped casing gradually expands, reducing the liquid velocity. Some of the kinetic energy is converted into static pressure energy, causing the liquid to flow out at a higher pressure through the outlet. Simultaneously, a vacuum is created at the center of the impeller due to the thrown liquid, while the pressure at the liquid surface is higher than at the center. Therefore, liquid from the suction line enters the pump under the pressure difference. As the impeller continues to rotate, liquid is continuously drawn in and expelled.

[0003] When there are many impurities in the medium being transported, the impurity particles will collide with the inner wall of the flow channel under the action of centrifugal force. Some larger impurity particles will adhere to the inner wall, reducing the cross-section of the flow channel and causing turbulence in the medium, thus affecting the flow rate and stability of the medium. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency and energy-saving double-suction centrifugal pump to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency and energy-saving double-suction centrifugal pump includes an upper pump casing, a lower pump casing, and a drive shaft. An impeller is mounted on the drive shaft. The upper pump casing has an arc-shaped flow channel inside. The pump also includes a drive unit for rotating the drive shaft. The drive unit includes a base plate, a drive component, a reduction mechanism, a hydraulic assembly, and a rotating assembly. The drive component is mounted on the base plate, the reduction mechanism is located at the output end of the drive component, and the rotating assembly is located at the hydraulic actuation end of the hydraulic assembly, within the flow channel. The reduction mechanism includes a housing, a gear assembly, a worm, a worm wheel, and a rack, all located inside the housing. The hydraulic assembly includes a hydraulic pipe and a hydraulic telescopic rod. The hydraulic telescopic rod has an arc-shaped structure, and the rotating assembly is located at the telescopic end of the hydraulic telescopic rod. The rotating assembly includes a connecting block, blades, a connecting ring, and an elastic element. The connecting block and the connecting ring are coaxially arranged, the blades are located between the connecting block and the connecting ring, and the elastic element is located outside the connecting ring.

[0007] Preferably, the drive component and the housing are both fixedly connected to the base plate, at least two gear assemblies are provided, a connecting component is provided between two adjacent gear assemblies, and the housing is a cylindrical structure.

[0008] Preferably, the gear assembly includes a sun gear, planet gears, and a ring gear arranged sequentially from the inside out. Multiple planet gears are provided, and the multiple planet gears are evenly distributed in a ring around the sun gear. All of the multiple planet gears are rotatably connected to the same planet carrier. The ring gear is fixedly connected to the annular inner wall of the housing.

[0009] Preferably, the worm gear is coaxially arranged with the planet carrier of the gear assembly away from the drive member, the worm gear is fixedly connected to the planet carrier, the connecting member is fixedly connected to the sun gear and the planet carrier of the adjacent gear assembly respectively, the sun gear, the planet carrier and the worm gear all have through slots inside, one end of the drive shaft is fixedly connected to the output end of the drive member, and the other end extends through the through slot to the space between the upper pump housing and the lower pump housing.

[0010] Preferably, an annular component is sleeved on the outer side of the drive shaft, and a plurality of annularly distributed splines are provided on the outer side of the annular component. The inner wall of the through groove on the sun gear of the gear assembly near the drive component has a spline groove that mates with the splines.

[0011] Preferably, one end of the hydraulic pipe is fixedly connected to the side of the housing away from the drive component, and the other end is connected to the hydraulic telescopic rod. A connecting rod and a piston are provided inside the hydraulic pipe near the housing. The two ends of the connecting rod are fixedly connected to the rack and the piston, respectively. A connecting rope is fixedly connected to the side of the piston away from the connecting rod. The end of the connecting rope away from the piston is fixedly connected to the telescopic end of the hydraulic telescopic rod.

[0012] Preferably, multiple blades are provided, and the multiple blades are evenly distributed around the connecting block, and the elastic element has a spiral structure.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] 1. This application incorporates a driving component, a hydraulic component, and a rotating component. The rotating component is positioned within the flow channel of the centrifugal pump. The driving component drives the hydraulic component, causing the rotating component to move within the flow channel. Simultaneously, the flow of the medium can rotate the rotating component. The rotating component contacts the inner wall of the flow channel, scraping it to remove impurity particles adhering to the inner wall, thereby reducing impurities and keeping the flow channel clean, thus ensuring the flow rate and stability of the medium.

[0015] 2. This application can scrape the inner wall of the flow channel by setting a rotating component. The rotating component is equipped with multiple elastic elements, which are spiral-shaped structures. When the rotating component rotates, the elastic elements unwind under the action of centrifugal force. The elastic elements can always fit the inner wall of the flow channel. Therefore, the rotating component can adapt to the cross-sectional inner diameter of different positions of the flow channel, thereby improving the cleaning efficiency and cleaning effect.

[0016] 3. This application reduces the output power of the drive shaft by setting a speed reduction mechanism, so that the hydraulic component can drive the rotating component to move at a slower speed in the inner wall of the flow channel. The speed reduction mechanism is equipped with a sun gear, planet gears, gear ring, worm gear, and worm. Through multiple structures, the output speed of the drive shaft is reduced, so that the rotating component can scrape the impurities on the inner wall of the flow channel multiple times, which helps to reduce the stains with strong adhesion and improve the cleaning effect. Attached Figure Description

[0017] Figure 1 A schematic diagram of a centrifugal pump structure provided according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of the drive unit structure provided according to an embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram of a hydraulic pipe and hydraulic telescopic rod structure provided according to an embodiment of the present invention is shown;

[0020] Figure 4 A schematic diagram of a rotating component structure provided according to an embodiment of the present invention is shown;

[0021] Figure 5 A schematic diagram of the overall structure of the deceleration mechanism provided according to an embodiment of the present invention is shown;

[0022] Figure 6 A first-view structural diagram of a deceleration mechanism provided according to an embodiment of the present invention is shown.

[0023] Figure 7 A second-view structural diagram of a deceleration mechanism provided according to an embodiment of the present invention is shown.

[0024] Legend:

[0025] 1. Upper pump housing; 2. Lower pump housing; 3. Drive shaft; 4. Base plate; 5. Drive component; 6. Housing; 7. Sun gear; 8. Planetary gears; 9. Gear ring; 10. Planetary carrier; 11. Connecting component; 12. Worm gear; 13. Worm wheel; 14. Rack; 15. Annular component; 16. Spline; 17. Spline groove; 18. Hydraulic pipe; 19. Hydraulic telescopic rod; 20. Connecting block; 21. Blade; 22. Connecting ring; 23. Elastic component; 24. Connecting rod; 25. Piston; 26. Connecting rope. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-7 The present invention provides a technical solution:

[0028] A high-efficiency and energy-saving double-suction centrifugal pump includes an upper pump housing 1, a lower pump housing 2, and a drive shaft 3. An impeller is mounted on the drive shaft 3. The upper pump housing 1 has an arc-shaped flow channel inside. It also includes a drive unit for rotating the drive shaft 3. The drive unit includes a base plate 4, a drive component 5, a reduction mechanism, a hydraulic assembly, and a rotating assembly. The drive component 5 is mounted on the base plate 4, the reduction mechanism is located at the output end of the drive component 5, and the rotating assembly is located at the hydraulic actuation end of the hydraulic assembly, within the flow channel. The reduction mechanism includes a housing 6 and a gear assembly. The gear assembly, including worm 12, worm wheel 13, and rack 14, is located inside the housing 6. The hydraulic assembly includes a hydraulic pipe 18 and a hydraulic telescopic rod 19, which has an arc-shaped structure. A rotating assembly is located on the telescopic end of the hydraulic telescopic rod 19. The rotating assembly includes a connecting block 20, a blade 21, a connecting ring 22, and an elastic element 23. The connecting block 20 and the connecting ring 22 are coaxially arranged, the blade 21 is located between the connecting block 20 and the connecting ring 22, and the elastic element 23 is located on the outside of the connecting ring 22.

[0029] Specifically, such as Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, both the drive component 5 and the housing 6 are fixedly connected to the base plate 4. At least two gear assemblies are provided, with a connecting member 11 between adjacent gear assemblies. The housing 6 has a cylindrical structure. Each gear assembly includes a sun gear 7, planet gears 8, and a ring gear 9 arranged sequentially from the inside out. Multiple planet gears 8 are provided, evenly distributed in a ring around the sun gear 7, and all planet gears 8 are rotatably connected to the same planet carrier 10. The ring gear 9 is fixedly connected to the annular inner wall of the housing 6. A worm gear 12 is coaxially arranged with the planet carrier 10 of the gear assembly away from the drive component 5, and is fixedly connected to the planet carrier 10. The connecting member 11 is fixedly connected to the sun gear 7 and planet carrier 10 of adjacent gear assemblies. The sun gear 7, planet carrier 10, and worm gear 12 all have through slots. One end of the drive shaft 3 is fixedly connected to the output end of the drive component 5, and the other end extends through the slot to the space between the upper pump housing 1 and the lower pump housing 2. An annular component 15 is fitted around the outer side of the drive shaft 3. Multiple evenly distributed annular splines 16 are arranged on the outer side of the annular component 15. The inner wall of the through groove on the sun gear 7 of the gear assembly near the drive component 5 has spline grooves 17 that mate with the splines 16. When the drive shaft 3 rotates, the splines 16 are located within the spline grooves 17, allowing the sun gear 7 to rotate with the drive shaft 3. The inner diameter of the sun gear 7 is smaller than the inner diameter of the planet gears 8. The rotation of the sun gear 7 causes the planet gears 8 and the planet carrier 10 to revolve around the sun gear 7. At this time, the gear assembly is a reduction structure, and the rotational speed of the connecting component 11 is less than the rotational speed of the sun gear 7. Therefore, through the two gear assemblies, the rotational speed at the output end of the gear assembly can be greatly reduced, thereby causing the worm gear 12 to rotate at a lower speed. Since the worm gear 12 and worm wheel 13 are also reduction structures, the rack 14 moves at a slower speed through multiple reduction structures, which helps to prolong the time the rotating assembly scrapes the inner wall of the flow channel.

[0030] Specifically, such as Figure 2 and Figure 3 As shown, one end of the hydraulic pipe 18 is fixedly connected to the side of the housing 6 away from the drive component 5, and the other end is connected to the hydraulic telescopic rod 19. A connecting rod 24 and a piston 25 are disposed inside the hydraulic pipe 18 near the housing 6. Both ends of the connecting rod 24 are fixedly connected to the rack 14 and the piston 25, respectively. A connecting rope 26 is fixedly connected to the side of the piston 25 away from the connecting rod 24. The end of the connecting rope 26 away from the piston 25 is fixedly connected to the telescopic end of the hydraulic telescopic rod 19. Moving the rack 14 pushes the connecting rod 24, causing the piston 25 to move within the hydraulic pipe 18. The piston 25 compresses the hydraulic oil, stretching the telescopic end of the hydraulic telescopic rod 19. The hydraulic telescopic rod 19 has an arc-shaped structure, allowing its telescopic end to move along the flow channel. When the drive component 5 reverses direction, the rack 14 moves in the opposite direction, and the piston 25 moves in the opposite direction, causing the hydraulic telescopic rod 19 to retract via the connecting rope 26.

[0031] Specifically, such as Figure 4As shown, multiple blades 21 are provided, and the multiple blades 21 are evenly distributed around the connecting block 20. The elastic element 23 has a spiral structure. When the connecting ring 22 rotates, the elastic element 23 extends radially outward under the action of centrifugal force, thereby allowing the elastic element 23 to slide against the inner wall of the flow channel, which helps to scrape off the attached stains.

[0032] In summary, the high-efficiency and energy-saving double-suction centrifugal pump provided in this embodiment uses the cleaning agent as the transmission medium during cleaning. The drive component 5 drives the drive shaft 3 to rotate. The drive shaft 3 is connected to the spline groove 17 through the spline 16, which drives the sun gear 7 to rotate. This further causes the planetary gear 8 to revolve around the sun gear 7, which in turn drives the planet carrier 10 to rotate around the sun gear 7. The connecting component 11 drives the adjacent gear assembly to run, thereby realizing the deceleration output of the power on the drive shaft 3. The worm gear 12 is driven to rotate by the gear assembly, which drives the worm wheel 13 to rotate, which further causes the rack 14 to move. This drives the connecting rod 24 to push the piston 25, causing the hydraulic oil in the hydraulic pipe 18 to flow. This squeezes the extension end of the hydraulic telescopic rod 19 to stretch. When the medium flows, it pushes the blade 21 to drive the connecting block 20 and the connecting ring 22 to rotate. Under the action of centrifugal force, the free end of the elastic element 23 extends to the radially outer end of the connecting ring 22, and then scrapes against the inner wall of the flow channel, which helps to remove the stains.

[0033] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency and energy-saving double-suction centrifugal pump, comprising an upper pump housing (1), a lower pump housing (2), and a drive shaft (3), wherein an impeller is disposed on the drive shaft (3), and the upper pump housing (1) has an arc-shaped flow channel inside, characterized in that, It also includes a drive unit, which is used to drive the drive shaft (3) to rotate. The drive unit includes a base plate (4), a drive component (5), a reduction mechanism, a hydraulic component and a rotating component. The drive component (5) is disposed on the base plate (4). The reduction mechanism is disposed on the output end of the drive component (5). The rotating component is disposed on the hydraulic actuation end of the hydraulic component and is located in the flow channel. The reduction mechanism includes a housing (6), a gear assembly, a worm (12), a worm wheel (13), and a rack (14), all of which are located inside the housing (6). The hydraulic assembly includes a hydraulic pipe (18) and a hydraulic telescopic rod (19). The hydraulic telescopic rod (19) has an arc-shaped structure, and the rotating assembly is located on the telescopic end of the hydraulic telescopic rod (19). The rotating assembly includes a connecting block (20), a blade (21), a connecting ring (22), and an elastic element (23). The connecting block (20) and the connecting ring (22) are coaxially arranged. The blade (21) is located between the connecting block (20) and the connecting ring (22). The elastic element (23) is located on the outside of the connecting ring (22). One end of the hydraulic pipe (18) is fixedly connected to the side of the housing (6) away from the drive member (5), and the other end is connected to the hydraulic telescopic rod (19). The hydraulic pipe (18) is provided with a connecting rod (24) and a piston (25) inside the end near the housing (6). The two ends of the connecting rod (24) are fixedly connected to the rack (14) and the piston (25) respectively. A connecting rope (26) is fixedly connected to the side of the piston (25) away from the connecting rod (24). The end of the connecting rope (26) away from the piston (25) is fixedly connected to the telescopic end of the hydraulic telescopic rod (19). The blades (21) are provided in multiple ways, and the multiple blades (21) are evenly distributed around the connecting block (20). The elastic element (23) is a spiral structure.

2. The high-efficiency energy-saving double-suction centrifugal pump according to claim 1, characterized in that, The drive unit (5) and the housing (6) are both fixedly connected to the base plate (4). At least two gear assemblies are provided, and a connecting member (11) is provided between two adjacent gear assemblies. The housing (6) is a cylindrical structure.

3. The high-efficiency energy-saving double-suction centrifugal pump according to claim 2, characterized in that, The gear assembly includes a sun gear (7), planet gears (8) and a gear ring (9) arranged sequentially from the inside out. There are multiple planet gears (8), which are evenly distributed in a ring around the sun gear (7). All planet gears (8) are rotatably connected to the same planet carrier (10). The gear ring (9) is fixedly connected to the annular inner wall of the housing (6).

4. The high-efficiency energy-saving double-suction centrifugal pump according to claim 3, characterized in that, The worm (12) is coaxially arranged with the planet carrier (10) of the gear assembly away from the drive member (5). The worm (12) is fixedly connected to the planet carrier (10). The connector (11) is fixedly connected to the sun gear (7) of the adjacent gear assembly and the planet carrier (10). The sun gear (7), the planet carrier (10) and the worm (12) all have through slots inside. One end of the drive shaft (3) is fixedly connected to the output end of the drive member (5), and the other end extends through the slot to the space between the upper pump housing (1) and the lower pump housing (2).

5. The high-efficiency energy-saving double-suction centrifugal pump according to claim 4, characterized in that, The drive shaft (3) is fitted with an annular part (15) on its outer side. The annular part (15) is provided with a plurality of annularly distributed splines (16) on its outer side. The sun gear (7) of the gear assembly near the drive part (5) has a spline groove (17) that mates with the spline (16) on its inner wall.

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