High-lift magnetic driving pump

Abstract

The utility model provides a high-lift magnetic drive pump which comprises a shell, fluid is filled in the shell, an impeller cavity is formed in the shell in a surrounding mode, an impeller is arranged in the impeller cavity, the impeller is movably connected into the impeller cavity through an impeller shaft, one end, away from the impeller, of the impeller shaft is connected with an inner magnetic rotor, and an isolation sleeve is arranged on the outer side of the inner magnetic rotor in a sleeved mode. And an outer magnetic rotor is arranged outside the isolation sleeve and is connected with the motor shaft. The impeller comprises an inner impeller body and an outer impeller body, the inner impeller body is connected into a groove formed in the outer impeller body, the inner impeller body comprises a first rotating disc and a second rotating disc, and first fan blades are arranged between the first rotating disc and the second rotating disc. And first drainage cavities are formed among the first fan blades. A second drainage cavity is formed in the portion, outside the inner impeller, of the outer impeller, and the first drainage cavity and the second drainage cavity are correspondingly arranged in the rotating direction. The impeller comprises the inner impeller and the outer impeller, so that the energy loss of fluid is reduced, and the efficiency of the impeller is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of magnetic drive pump, concretely relates to a high-lift magnetic drive pump. BACKGROUND

[0002] The magnetic drive pump realizes non-contact transmission of power through a magnetic coupler, eliminates the leakage risk of traditional mechanical seals, is widely used in chemical industry, petroleum, pharmaceutical and other fields, and is especially suitable for conveying flammable, explosive or toxic media. However, with the increasing demand for pump lift in industrial scenarios (such as the common need for lift over 100 meters in chemical processes), the traditional single-stage magnetic pump is difficult to meet the high-pressure demand due to the limited energy conversion efficiency of the impeller. The main technical path to improve the lift of the magnetic pump at present is the multi-stage impeller series design, that is, high-lift output is realized by gradually increasing the pressure through multiple impellers. The multi-stage impeller design of this structure leads to a decrease in the efficiency of the latter impellers, affecting the lift and efficiency of the magnetic pump, and cannot meet the demand for high-lift conveying.

[0003] Therefore, the above problems need to be solved. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the above shortcomings, and provides a high-lift magnetic drive pump, which optimizes the impeller design, improves the efficiency of the latter impellers, improves the lift and efficiency of the magnetic pump, and meets the demand for high-lift conveying.

[0005] Technical Solution: To achieve the above objectives, this utility model provides a high-lift magnetically driven pump, including a housing filled with fluid. The housing surrounds an impeller cavity, within which an impeller is located. The impeller is movably connected to the impeller cavity via an impeller shaft. An inner magnetic rotor is connected to the end of the impeller shaft away from the impeller. An isolation sleeve is fitted around the inner magnetic rotor, and an outer magnetic rotor is located outside the isolation sleeve. The outer magnetic rotor is connected to a motor shaft. The impeller includes an inner impeller and an outer impeller. The inner impeller is connected to a groove in the outer impeller. The inner impeller includes a first rotating disk and a second rotating disk, with a first fan blade positioned between the first and second rotating disks. A first drainage cavity is formed between the first fan blades. A second drainage cavity is located on the outer side of the inner impeller of the outer impeller. The rotation directions of the first and second drainage cavities are correspondingly set. In use, the motor is started, and the motor shaft drives the outer magnetic rotor to rotate. The outer magnetic rotor, through magnetic coupling, drives the inner magnetic rotor to rotate. The inner magnetic rotor, through the impeller shaft, drives the impeller to rotate. The impeller discharges the fluid filling the housing and then draws the fluid into the impeller cavity, thus achieving fluid transport. This invention uses an inner impeller and an outer impeller. The inner impeller, with a first blade between the first and second rotating discs, forms a first flow-guiding cavity, guiding the fluid flow within this cavity, reducing fluid energy loss, and improving impeller efficiency. The inner impeller draws the fluid into the first flow-guiding cavity, and the fluid enters a second flow-guiding cavity. The second flow-guiding cavity guides the fluid, reduces eddies, and further increases the impeller suction, increasing the head of the magnetically driven pump to meet the requirements of high-head transport.

[0006] Furthermore, in the aforementioned high-lift magnetic drive pump, there are two or more impellers connected sequentially along the impeller shaft. By using multiple impellers, the fluid is pressurized multiple times, resulting in progressively increased fluid pressure, improved fluid transport efficiency, and increased pump head, thus meeting the requirements for high-lift pumping.

[0007] Furthermore, in the aforementioned high-lift magnetically driven pump, the outer impeller includes a third and a fourth rotating disk. A second blade is provided between the third and fourth rotating disks, forming a third flow-inductance chamber. The third and second flow-inductance chambers are sequentially arranged adjacent to each other along the impeller shaft. During fluid transport, the fluid enters from the inlet of the first flow-inductance chamber near the center of the impeller. The fluid passes through the first flow-inductance chamber into the second flow-inductance chamber and then flows into the impeller chamber from the second flow-inductance chamber. The third flow-inductance chamber guides the fluid in the impeller chamber to the first flow-inductance chamber of the next impeller. The fluid is pressurized and performs work again by the next impeller. The fluid is pressurized and performs work by multiple impellers, thereby increasing the head of the magnetically driven pump.

[0008] Furthermore, in the aforementioned high-lift magnetically driven pump, there are two or more second drainage chambers arranged in an array around the axis of the third rotary disk. With multiple second drainage chambers, during rotation, the second drainage chambers discharge fluid into the impeller chamber, generating suction to improve fluid transport efficiency and increase the head of the magnetically driven pump.

[0009] Furthermore, in the aforementioned high-lift magnetically driven pump, a guide section is provided on the side of the first turntable near the second turntable. The guide section is located at the center of the first turntable and is conical in shape. The first fan blade extends spirally along the guide section. The guide section guides the fluid into the first inlet chamber, reduces fluid eddies, improves fluid delivery efficiency, and increases the lift of the magnetically driven pump.

[0010] Furthermore, in the aforementioned high-lift magnetically driven pump, the casing is provided with an inlet and an outlet, which are connected through an impeller cavity. Liquid enters through the inlet, passes through the impeller cavity, is pressurized by the impeller, and is discharged through the outlet.

[0011] Furthermore, in the aforementioned high-lift magnetically driven pump, the casing includes a volute, an intermediate casing, and an end cover. The volute, intermediate casing, and end cover are sequentially connected and fixed by fasteners. The inlet is located on the end cover, and the outlet is located on the volute. The volute has a volute cavity, which effectively collects the liquid flowing out of the impeller at high speed and guides it to the outlet. This helps to convert the fluid's kinetic energy into pressure energy, reduces energy loss, improves the efficiency of the magnetically driven pump, and increases the head.

[0012] Furthermore, in the aforementioned high-lift magnetic drive pump, a check valve is connected to the discharge port. The check valve prevents high-pressure liquid from flowing back into the pump when the magnetic drive pump stops working, preventing water hammer and protecting the magnetic drive pump.

[0013] Furthermore, in the aforementioned high-lift magnetic drive pump, the intermediate housing is designed as multiple segments that are interlocked. This multi-segment design allows for a longer intermediate housing, enabling the connection of more impellers, increasing the number of fluid pressurization cycles, and ultimately increasing the pump's head.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects: The high-lift magnetic drive pump of this utility model has an impeller consisting of an inner impeller and an outer impeller. The inner impeller forms a first flow chamber through a first blade between a first and a second rotating disc, guiding the fluid to flow within the first flow chamber, reducing fluid energy loss and improving impeller efficiency. A second flow chamber is provided to guide the fluid, reducing eddies. The second flow chamber increases the impeller suction, increasing the head of the magnetic drive pump and meeting the requirements for high-lift delivery. A third flow chamber is provided to guide the fluid from the impeller chamber to the first flow chamber of the next impeller. The fluid is pressurized again by the next impeller, and after multiple pressurizations and work, the fluid is discharged, further increasing the head of the magnetic drive pump. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the high-lift magnetically driven pump of this utility model.

[0016] Figure 2 forFigure 1 A magnified view of a portion of the image;

[0017] Figure 3 This is an exploded view of the impeller;

[0018] Figure 4 This is a cross-sectional view of the impeller.

[0019] In the diagram: 1. Shell, 11. Impeller cavity, 12. Inlet, 13. Outlet, 14. Volute, 15. Intermediate shell, 16. End cap, 2. Impeller, 21. Impeller shaft, 3. Inner magnetic rotor, 4. Isolation sleeve, 5. Outer magnetic rotor, 22. Inner impeller, 221. First rotating disk, 2211. Guide section, 222. Second rotating disk, 223. First fan blade, 224. First drainage cavity, 23. Outer impeller, 231. Second drainage cavity, 232. Third rotating disk, 233. Fourth rotating disk, 234. Second fan blade, 235. Third drainage cavity. Detailed Implementation

[0020] Example 1

[0021] like Figures 1-3 A high-lift magnetically driven pump is shown, comprising a housing 1 filled with fluid. The housing 1 surrounds an impeller cavity 11, within which an impeller 2 is disposed. The impeller 2 is movably connected to the impeller cavity 11 via an impeller shaft 21. An inner magnetic rotor 3 is connected to the end of the impeller shaft 21 away from the impeller 2. An isolation sleeve 4 is fitted around the inner magnetic rotor 3, and an outer magnetic rotor 5 is disposed outside the isolation sleeve 4. The outer magnetic rotor 5 is connected to a motor shaft. The impeller 2 includes an inner impeller 22 and an outer impeller 23. The inner impeller 22 is connected to a groove provided in the outer impeller 23. The inner impeller 22 includes a first rotating disk 221 and a second rotating disk 222, with a first fan blade 223 disposed between the first rotating disk 221 and the second rotating disk 222. A first drainage cavity 224 is formed between the first fan blades 223. A second drainage cavity 231 is provided on the outer portion of the outer impeller 23, and the rotation directions of the first drainage cavity 224 and the second drainage cavity 231 are correspondingly set.

[0022] In this embodiment, there are two or more impellers 2, which are connected sequentially along the impeller shaft 21.

[0023] In this embodiment, the outer impeller 23 includes a third turntable 232 and a fourth turntable 233. A second fan blade 234 is provided between the third turntable 232 and the fourth turntable 233. A third drainage cavity 235 is formed between the second fan blades 234. The third drainage cavity 235 and the second drainage cavity 231 are arranged adjacent to each other along the impeller shaft 21.

[0024] In this embodiment, there are two or more second drainage chambers 231 arranged in an array around the axis of the third turntable 232. With multiple second drainage chambers 231, during rotation, the second drainage chambers 231 discharge fluid into the impeller chamber 11, generating suction and improving fluid transport efficiency.

[0025] In this embodiment, the housing 1 is provided with a liquid inlet 12 and a liquid outlet 13, which are connected through an impeller cavity 11. Liquid enters from the liquid inlet 12, passes through the impeller cavity 11, is pressurized by the impeller 2, and is discharged from the liquid outlet 13.

[0026] In this embodiment, the housing 1 includes a volute 14, an intermediate housing 15, and an end cap 16. The volute 14, the intermediate housing 15, and the end cap 16 are connected and fixed in sequence by fasteners. The liquid inlet 12 is located on the end cap 16, and the liquid outlet 13 is located on the volute 14.

[0027] In this embodiment, a check valve is connected to the drain port 13. The intermediate housing 15 is configured as multiple segments, which are snap-fitted together.

[0028] like Figure 4 The high-lift magnetically driven pump shown has a guide section 2211 on the side of the first turntable 221 near the second turntable 222. The guide section 2211 is located at the center of the first turntable 221 and is conical in shape. The first fan blade 223 extends spirally along the guide section 2211. The guide section 2211 guides the fluid into the first drainage chamber 224, reducing fluid turbulence.

[0029] When this utility model is used, the motor is started, and the motor shaft drives the outer magnetic rotor 5 to rotate. The outer magnetic rotor 5 drives the inner magnetic rotor 3 to rotate through magnetic coupling. The inner magnetic rotor 3 drives the impeller 2 to rotate through the impeller shaft 21. The impeller 2 rotates the fluid filled in the impeller cavity 11. Under the action of centrifugal force, the fluid is discharged from the drain port 13. The impeller cavity 11 is under negative pressure, which in turn draws the fluid in from the inlet port 12. Fluid enters through inlet 12 and then through the inlet of the first drainage chamber 224 near the center of impeller 2. The inner impeller 22 rotates, and the fluid, under the action of centrifugal force, passes through the first drainage chamber 224 and enters the second drainage chamber 231. The outer impeller 23 rotates and discharges the fluid in the second drainage chamber 231 into the rotating impeller chamber 11. The third drainage chamber 235 guides the fluid in the impeller chamber 11 to the first drainage chamber 224 of the next impeller 2. The fluid is pressurized again by the next impeller 2. This process is repeated, and the fluid is discharged after multiple times of work by multiple impellers 2, thereby improving the efficiency and head of the magnetic drive pump.

[0030] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A high-lift magnetically driven pump, characterized in that: The device includes a housing (1) filled with fluid, an impeller cavity (11) surrounding the housing (1), an impeller (2) inside the impeller cavity (11), the impeller (2) being movably connected to the impeller cavity (11) via an impeller shaft (21), an inner magnetic rotor (3) connected to the end of the impeller shaft (21) away from the impeller (2), an isolation sleeve (4) sleeved on the outside of the inner magnetic rotor (3), an outer magnetic rotor (5) outside the isolation sleeve (4), and the outer magnetic rotor (5) connected to the motor shaft; the impeller (2) includes an inner impeller (22) and an inner impeller (23). An outer impeller (23) is connected to an inner impeller (22) within a groove provided in the outer impeller (23). The inner impeller (22) includes a first rotating disk (221) and a second rotating disk (222). A first fan blade (223) is provided between the first rotating disk (221) and the second rotating disk (222). A first drainage cavity (224) is formed between the first fan blades (223). A second drainage cavity (231) is provided on the outer side of the inner impeller (22). The rotation directions of the first drainage cavity (224) and the second drainage cavity (231) are set accordingly.

2. The high-lift magnetically driven pump according to claim 1, characterized in that: The impeller (2) has two or more impellers, which are connected sequentially along the impeller shaft (21).

3. The high-lift magnetically driven pump according to claim 1, characterized in that: The outer impeller (23) includes a third turntable (232) and a fourth turntable (233). A second fan blade (234) is provided between the third turntable (232) and the fourth turntable (233). A third drainage cavity (235) is formed between the second fan blade (234). The third drainage cavity (235) and the second drainage cavity (231) are arranged adjacent to each other in sequence.

4. The high-lift magnetically driven pump according to claim 3, characterized in that: The second drainage cavity (231) is provided in two or more, and the second drainage cavity (231) is arranged in an array around the axis of the third turntable (232).

5. The high-lift magnetically driven pump according to claim 1, characterized in that: The first turntable (221) has a guide part (2211) on the side near the second turntable (222). The guide part (2211) is located at the center of the first turntable (221) and is conical. The first fan blade (223) extends spirally along the guide part (2211).

6. The high-lift magnetically driven pump according to claim 1, characterized in that: The housing (1) is provided with a liquid inlet (12) and a liquid outlet (13), which are connected through the impeller cavity (11).

7. The high-lift magnetically driven pump according to claim 6, characterized in that: The housing (1) includes a volute (14), an intermediate housing (15) and an end cap (16). The volute (14), the intermediate housing (15) and the end cap (16) are connected and fixed in sequence by fasteners. The liquid inlet (12) is located on the end cap (16) and the liquid outlet (13) is located on the volute (14).

8. The high-lift magnetically driven pump according to claim 7, characterized in that: The drain port (13) is connected to a check valve.

9. The high-lift magnetically driven pump according to claim 7, characterized in that: The intermediate shell (15) is configured as multiple segments, and the multiple segments of the intermediate shell (15) are snapped together.

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