Improved structure of an impeller pump

Abstract

The application relates to the technical field of impeller pumps, in particular to an improved structure of an impeller pump, which comprises a driving mechanism, a first rotating component, a second rotating component and a connecting piece. The driving component of the driving mechanism drives the rotating of a connecting shaft and a transmission shaft. The first magnet part of the first rotating component rotates with the transmission shaft. The second magnet of the second rotating component is opposite to the first magnet in the magnetic field direction, drives the rotation of the impeller in the rotating space, and the connecting piece is sleeved on the water inlet and outlet of a pump upper cover, so that the fluid can conveniently enter and exit. The magnetic driving mode is adopted, the direct connection of the transmission components is avoided, the eccentricity problem caused by factors such as machining precision, assembly tolerance and vibration is reduced, and the working stability and service life of the impeller pump are improved.

Description

Technical Field

[0001] This application relates to the field of impeller pump technology, and in particular to an improved structure for an impeller pump. Background Technology

[0002] As a common fluid transport device, the core function of an impeller pump relies on the stable rotation of the impeller within the pump chamber to perform work on the fluid. The rotational power of the impeller is typically transmitted from an external motor via a drive shaft. To ensure transmission efficiency, smooth operation, and service life, the concentricity between the drive shaft and the impeller shaft core is crucial.

[0003] In existing impeller pump designs, the transmission components typically employ a stepped connection method. For example, the motor's drive shaft is first connected to a connecting sleeve, which then connects to the impeller's shaft core. While this series structure of "drive shaft—connecting sleeve—shaft core" offers some convenience in assembly, it has inherent structural defects. Because the drive shaft, connecting sleeve, and shaft core are three independent parts connected in stages, cumulative errors are easily generated under the influence of multiple factors such as machining accuracy, assembly tolerances, and vibrations during long-term operation. This leads to a misalignment of the central axes among the three components, resulting in eccentricity. This eccentricity problem can trigger a series of chain reactions and adverse consequences, such as: 1. Abnormal wear of the first bearing sleeve: The eccentricity of the shaft core will cause abnormal contact and friction between it and the inner hole of the first bearing sleeve supporting it, resulting in wear and gradual enlargement of the inner hole of the first bearing sleeve. This not only exacerbates the eccentricity but also leads to lubrication failure and heat accumulation.

[0004] 2. Impeller Imbalance: The eccentricity of the shaft core is directly transmitted to the impeller fixed at the front end of the shaft core, causing the impeller to deviate and become unbalanced during rotation. The unbalanced operation of the impeller will cause severe vibration and noise.

[0005] 3. Seizure and Functional Failure: As the first bearing sleeve wears more severely and the impeller misalignment increases, the ultimate serious consequence is that the impeller interferes with the pump casing inner wall or other components, causing the impeller to seize and become unable to rotate. At this point, the water pump completely loses its pumping function, and the entire equipment fails.

[0006] In summary, the eccentricity of the transmission chain in existing technologies fundamentally restricts the reliability and service life of impeller pumps, resulting in high failure rates and high maintenance costs. Therefore, there is an urgent need in this field for a novel structural solution that can fundamentally improve transmission concentricity, thereby enhancing the operational stability of impeller pumps and extending their service life. Utility Model Content

[0007] The purpose of this application is to overcome the above-mentioned technical problems and provide an improved structure for an impeller pump that can avoid direct connection of transmission components through magnetic drive, reduce eccentricity problems caused by factors such as machining accuracy, assembly tolerance, and vibration, and improve the working stability and service life of the impeller pump.

[0008] This application discloses an improved structure for an impeller pump, specifically adopting the following solution: An improved structure for an impeller pump includes: a drive mechanism comprising a connecting shaft, a transmission shaft, and a drive assembly; the transmission shaft is connected to the connecting shaft, and the drive assembly is sleeved on the connecting shaft for driving the connecting shaft and the transmission shaft to rotate; a first rotating assembly comprising a fixed cover, a metal frame, a retaining ring, and a first magnet; one end of the transmission shaft away from the drive assembly is inserted into the fixed cover; the metal frame is sleeved on the transmission shaft and located within the fixed cover; the retaining ring is sleeved in a first groove of the transmission shaft and located within the fixed cover, abutting against the metal frame; and the first magnet is attracted to the metal frame and abuts against the retaining ring, for rotating with the transmission shaft. The second rotating component, located at the end of the first rotating component away from the driving component, includes a lower pump cover, an impeller, an upper pump cover, and a second magnet. The lower pump cover and the upper pump cover are joined to form a rotating space. The lower pump cover is connected to the fixed cover at the end away from the drive shaft. A shaft core is injection-molded inside the lower pump cover. The impeller is located in the rotating space and is sleeved on the shaft core. The second magnet has a magnetic field direction opposite to that of the first magnet and is injection-molded inside the impeller. It is used to drive the impeller to rotate with the rotation of the first magnet. The connecting member has an inlet and outlet port sleeved on the upper pump cover, and a channel through the inlet and outlet port is provided on the connecting member.

[0009] By adopting the above technical solution, the drive component of the drive mechanism drives the connecting shaft and the transmission shaft to rotate, providing power for the operation of the entire impeller pump and improving the working efficiency of the impeller pump. In the first rotating component, the retaining ring abuts against the metal frame, and the first magnet is attracted to the metal frame, which can ensure that the first magnet rotates stably with the transmission shaft and avoids shaking or displacement during rotation, thus improving the stability of rotation. In the second rotating component, the pump lower cover and the pump upper cover are joined to form a rotation space, the shaft core is injected into the pump lower cover, and the magnetic field direction of the second magnet is opposite to that of the first magnet and is injected into the impeller. The magnetic field drives the impeller to rotate, and the impeller can generate centrifugal force to realize the functions of pumping and draining water. There is no need for mechanical connection between the structures, which reduces wear and noise. At the same time, the first rotating component and the second rotating component are two completely separate structural forms, which can effectively avoid the problems of impeller jamming, wear and short life caused by shaft misalignment. The connecting piece is sleeved on the inlet and outlet of the pump upper cover and a channel is set to ensure that the liquid can smoothly enter and exit the impeller pump, improving the efficiency of liquid transportation.

[0010] Optionally, it also includes: a fixing seat, sleeved on the connecting shaft, to fix the connecting shaft to an external component.

[0011] By adopting the above technical solution, the fixed seat is sleeved on the connecting shaft, which can securely fix the connecting shaft to the external component, enhance the stability of the connection between the connecting shaft and the external component, and ensure the reliable installation of the entire impeller pump improved structure on the external component.

[0012] Optionally, a first bearing and a second bearing are sleeved on the drive shaft, and a limiting groove is provided on the fixed seat for accommodating the first bearing. The second bearing is disposed in the fixed cover at the end of the metal frame away from the retaining ring.

[0013] By adopting the above technical solution, the first bearing and the second bearing are sleeved on the drive shaft, which can reduce the frictional resistance when the drive shaft rotates, reduce energy loss, improve transmission efficiency, and extend the service life of the drive shaft. The limiting groove provided on the fixed seat for accommodating the first bearing can play a role in positioning and fixing the first bearing, ensuring the stability of the first bearing during operation, thereby ensuring the stable rotation of the drive shaft and making the impeller pump run more smoothly and reliably.

[0014] Optionally, the second rotating assembly further includes: a ceramic bushing and a metal plate located at the impeller shaft center, one end face of the ceramic bushing abutting against the metal plate and tightly fitted with the impeller, and slidingly fitted with the shaft core, wherein the shaft core passes through the ceramic bushing and abuts against the metal plate.

[0015] By adopting the above technical solution, the ceramic bushing is located at the impeller shaft and is tightly fitted to the impeller, which can enhance the stability of the impeller structure and make the impeller less prone to shaking during rotation. The ceramic bushing is slidably fitted with the shaft core, which can reduce the friction between the impeller and the shaft core when the impeller rotates, reduce energy loss, and improve the operating efficiency of the impeller pump. At the same time, in conjunction with the setting of the shaft core abutting the metal plate, it can reduce the wear of the shaft core and the impeller and extend the service life of the impeller pump.

[0016] Optionally, the drive assembly includes a pulley and a drive belt. The pulley is sleeved on the connecting shaft, and the drive belt is sleeved on the pulley and an external drive wheel to drive the pulley to rotate.

[0017] By adopting the above technical solution, the drive assembly consisting of a pulley and a transmission belt is sleeved on the connecting shaft. The transmission belt cooperates with the external transmission wheel to drive the pulley to rotate, which in turn drives the connecting shaft and the transmission shaft to rotate, causing the first magnet of the first rotating assembly to rotate. Through the magnetic field, the impeller of the second rotating assembly is driven to rotate, thus realizing the operation of the impeller pump.

[0018] Optionally, a first sealing ring is provided at the mating point of the pump lower cover and the pump upper cover, and the pump lower cover and the pump upper cover are ultrasonically fused together.

[0019] By adopting the above technical solution, a first sealing ring is set at the mating point of the pump's lower cover and upper cover, which can prevent liquid leakage from the mating point and improve the sealing performance of the impeller pump. The pump's lower cover and upper cover are ultrasonically fused together, making the connection between the two more solid, enhancing the stability of the structure, and further ensuring the normal operation of the impeller pump.

[0020] Optionally, the fixing cover is placed on the lower cover of the pump, and the two are provided with multiple fixing holes for fixing by screws.

[0021] By adopting the above technical solution, the fixed cover is placed on the pump lower cover, and multiple fixing holes are provided on both sides and fixed by screws. This ensures a stable connection between the fixed cover and the pump lower cover, guarantees the connection stability between the first rotating component and the second rotating component, and is conducive to the stable operation of the entire impeller pump improved structure. It also prevents loosening or displacement during use due to insecure fixing, thereby improving the reliability and service life of the impeller pump.

[0022] Optionally, a second sealing ring is fitted onto the inlet and outlet, and a second groove is provided on the corresponding inlet and outlet for accommodating the second sealing ring.

[0023] By adopting the above technical solution, a second sealing ring is fitted at the inlet and outlet, and a second groove is provided at the inlet and outlet for the second sealing ring to be accommodated. This can effectively prevent the medium from leaking from the inlet and outlet, improve the sealing performance and stability of the impeller pump, and at the same time provide an accurate installation position for the second sealing ring, ensuring its installation accuracy and reliability.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The drive assembly of the drive mechanism drives the connecting shaft and the transmission shaft to rotate, providing power for the operation of the entire impeller pump and improving the working efficiency of the impeller pump; in the first rotating assembly, the retaining ring abuts against the metal frame, and the first magnet is attracted inside the metal frame, which can ensure that the first magnet rotates stably with the transmission shaft, avoiding shaking or displacement during rotation, and improving the stability of rotation. 2. In the second rotating assembly, the pump lower cover and pump upper cover are aligned to form a rotating space. The shaft core is injection molded inside the pump lower cover. The magnetic field direction of the second magnet is opposite to that of the first magnet and is injection molded inside the impeller. The magnetic field drives the impeller to rotate, and the impeller can generate centrifugal force to realize the functions of pumping and draining water. There is no need for mechanical connection between the structures, which reduces wear and noise. At the same time, the first rotating assembly and the second rotating assembly are two completely separate structures, which can effectively avoid the problems of impeller jamming, wear and short life caused by shaft misalignment. 3. The connecting parts are fitted onto the inlet and outlet of the pump cover and have channels to ensure that the liquid can smoothly enter and exit the impeller pump, thus improving the efficiency of liquid transportation; the fixed seat is fitted onto the connecting shaft, which can firmly fix the connecting shaft to the external components, enhancing the stability of the connection between the connecting shaft and the external components, and ensuring the reliable installation of the entire impeller pump improved structure on the external components. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of an improved impeller pump structure disclosed in an embodiment of this application; Figure 2 for Figure 1 An exploded structural diagram of a modified impeller pump structure disclosed herein; Figure 3 for Figure 1 A cross-sectional structural schematic diagram of an improved impeller pump structure is disclosed. Figure 4 for Figure 3 A schematic diagram of the enlarged structure A of an improved impeller pump structure is disclosed.

[0026] Explanation of reference numerals in the attached figures: 10. Drive mechanism; 11. Connecting shaft; 12. Transmission shaft; 121. First groove; 122. First bearing; 123. Second bearing; 13. Drive assembly; 131. Pulley; 132. Transmission belt; 20. First rotating assembly; 21. Fixed cover; 211. Fixed hole; 22. Metal frame; 23. Snap ring; 24. First magnet; 30. Second rotating assembly; 31. Pump lower cover; 32. Impeller; 33. Pump upper cover; 331. Inlet / outlet; 3311. Second groove; 34. Second magnet; 35. Shaft core; 36. First sealing ring; 37. Ceramic bushing; 38. Metal sheet; 39. Second sealing ring; 40. Connector; 41. Channel; 50. Fixed seat; 51. Limiting groove. Detailed Implementation

[0027] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0028] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0029] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0030] See Figure 1 and Figure 2 The present application discloses an improved impeller pump structure, which includes a drive mechanism 10, a first rotating component 20, a second rotating component 30, and a connector 40.

[0031] In this embodiment, the drive mechanism 10 is connected to the first rotating component 20, providing it with rotational power. The first rotating component 20 and the second rotating component 30 interact through a magnetic field, driving the impeller 32 of the second rotating component 30 to rotate. The connecting piece 40 is fitted onto the inlet / outlet 331 of the pump cover 33 of the second rotating component 30, facilitating the entry and exit of fluid. In this embodiment, the magnetic drive method avoids direct connection of transmission components, reducing eccentricity problems caused by factors such as machining accuracy, assembly tolerance, and vibration, thereby improving the working stability and service life of the impeller pump.

[0032] Specifically, the drive mechanism 10 includes a connecting shaft 11, a transmission shaft 12, and a drive assembly 13. The connecting shaft 11 is made of metal, such as stainless steel, which has high strength and corrosion resistance. It is cylindrical in shape with a smooth surface, facilitating the fitting and connection of other components. The transmission shaft 12 is also made of metal and is connected to the connecting shaft 11. The connection method can be a spline connection, which ensures torque transmission between the two, but this is not a limitation.

[0033] See Figure 2 and Figure 3The drive assembly 13 is mounted on the connecting shaft 11 and is used to drive the connecting shaft 11 and the transmission shaft 12 to rotate. The drive assembly 13 includes a pulley 131 and a transmission belt 132. The pulley 131, mounted on the connecting shaft 11, is typically made of cast iron or cast steel and has anti-slip textures on its surface to ensure friction between the transmission belt 132 and the pulley 131. Alternatively, the pulley 131 can be made of engineering plastic to reduce cost and weight. The transmission belt 132 is mounted on the pulley 131 and the external transmission wheel to drive the pulley 131 to rotate. The transmission belt 132 is generally made of rubber, possessing a certain degree of elasticity and wear resistance. When the external transmission wheel rotates, the transmission belt 132 drives the pulley 131 to rotate, thereby driving the connecting shaft 11 and the transmission shaft 12 to rotate. This combination of drive assemblies 13 enables efficient power transmission and provides a certain degree of buffering, reducing the impact of vibration on the transmission components.

[0034] See Figure 2 and Figure 4 The first rotating assembly 20 includes a fixed cover 21, a metal frame 22, a retaining ring 23, and a first magnet 24. The fixed cover 21 can be made of plastic, which has good insulation and corrosion resistance, and its external structure is as follows. Figure 3 As shown, a through hole is provided in the middle to facilitate the insertion of the drive shaft 12. The end of the drive shaft 12 away from the drive assembly 13 is inserted into the fixed cover 21, and the two are fitted with a clearance to ensure that the drive shaft 12 can rotate flexibly in the fixed cover 21.

[0035] The metal frame 22 is fitted onto the drive shaft 12 and located within the fixed cover 21. The metal frame 22 is typically made of iron, and its surface may be galvanized to prevent rusting. Its external structure is as follows: Figure 2 As shown, it is used to accommodate and hold the first magnet 24. The retaining ring 23, in an E-shape, is fitted into the first groove 121 of the drive shaft 12 and located within the fixing cover 21, abutting against the metal frame 22 to prevent the metal frame 22 from detaching from the drive shaft 12 and ensuring stable transmission. The first magnet 24 is attracted within the metal frame 22 and abuts against the retaining ring 23. The first magnet 24 can be a neodymium iron boron magnet or a magnet of different materials, possessing strong magnetism. When the drive shaft 12 rotates, it drives the connecting shaft 11 and the metal frame 22 to rotate, thereby causing the first magnet 24 to rotate accordingly.

[0036] See Figure 2 and Figure 4 The second rotating assembly 30 is located at the end of the first rotating assembly 20 away from the drive assembly 13, and includes a lower pump cover 31, an impeller 32, an upper pump cover 33, a second magnet 34, a shaft core 35, and a first sealing ring 36. The lower pump cover 31 is fixed to the fixed cover 21 by screws, and the lower pump cover 31 and the fixed cover 21 are provided with fixing holes 211, such as... Figure 2As shown, there are 3 fixing holes 211 and 3 screws for fixing.

[0037] The pump lower cover 31 and pump upper cover 33 mate to form a rotation space. Both covers can be made of plastic, offering good chemical corrosion resistance. A first sealing ring 36, typically made of rubber, is provided at the mating point of the pump lower cover 31 and pump upper cover 33 to prevent fluid leakage. Furthermore, the pump lower cover 31 and pump upper cover 33 are ultrasonically fused together, ensuring a tight and stable connection.

[0038] The pump lower cover 31 is injection molded with a shaft core 35. The shaft core 35 is made of metal, such as copper, or ceramic, and has good wear resistance. The impeller 32 is located in the rotation space and is fitted onto the shaft core 35. The impeller 32 can be made of plastic and is blade-shaped, capable of performing work on the fluid when rotating. The second magnet 34 has a magnetic field direction opposite to that of the first magnet and is injection molded inside the impeller 32. When the first magnet rotates, the interaction of the magnetic fields drives the second magnet 34 and the impeller 32 to rotate on the shaft core 35.

[0039] See Figure 2 and Figure 4 The second rotating component 30 also includes a ceramic bushing 37 and a metal plate 38, both located at the shaft center of the impeller 32. One end face of the ceramic bushing 37 abuts against the metal plate 38. The ceramic bushing 37 is tightly fitted with the impeller 32 and slidably fitted with the shaft core 35. The shaft core 35 passes through the ceramic bushing 37 and abuts against the metal plate 38.

[0040] The ceramic bushing 37 is located at the axis of the impeller 32 and is tightly fitted to the impeller 32, enhancing the stability of the impeller 32 structure and preventing it from shaking during rotation. The ceramic bushing 37 is also slidably fitted with the shaft core 35, reducing friction between the impeller 32 and the shaft core 35 during rotation, thus reducing energy loss and improving the operating efficiency of the impeller pump. Furthermore, the arrangement of the shaft core 35 abutting against the metal plate 38 further reduces wear on both the shaft core 35 and the impeller 32, extending the service life of the impeller pump. In this embodiment, the ceramic bushing 37 is made of ceramic material, and the metal plate 38 is made of metal, both possessing high hardness and good wear resistance.

[0041] See Figure 1 and Figure 2The connector 40 is fitted onto the inlet / outlet 331 of the pump cover 33 and fixed to the pump cover 33 by screws. A channel 41 is provided on the connector 40 to pass through the inlet / outlet 331. The connector 40 can be made of metal, such as stainless steel, or plastic, possessing high strength and corrosion resistance. A second sealing ring 39 is fitted onto the inlet / outlet 331, and a second groove 3311 is provided on the corresponding inlet / outlet 331 to accommodate the second sealing ring 39. The second sealing ring 39 is made of rubber and is used to ensure a seal between the connector 40 and the inlet / outlet 331, preventing fluid leakage.

[0042] Furthermore, the improved impeller pump structure also includes a mounting base 50, which is sleeved on the connecting shaft 11 to fix the connecting shaft 11 to the external component, thereby achieving overall structural stability. The mounting base 50 can be made of metal, such as aluminum alloy, which has high strength and light weight, or it can be made of plastic, and its shape is as follows... Figure 3 As shown.

[0043] See Figure 2 and Figure 4 A first bearing 122 and a second bearing 123 are sequentially mounted on the drive shaft 12. A limiting groove 51 is provided on the fixed seat 50 for accommodating the first bearing 122. The second bearing 123 is disposed in the fixed cover 21, located at the end of the metal frame 22 away from the retaining ring 23.

[0044] Both the first bearing 122 and the second bearing 123 are rolling bearings, which reduces friction during the rotation of the drive shaft 12. The shape of the limiting groove 51 matches the outer ring shape of the first bearing 122, ensuring the stability of the first bearing 122 within the fixed seat 50. The second bearing 123, located in the fixed cover 21, prevents wear between the drive shaft 12 and the fixed cover 21, and makes rotation smoother, improving transmission performance. Simultaneously, the arrangement of the first bearing 122 and the second bearing 123 also reduces vibration and noise, improving the overall performance and service life of the impeller pump.

[0045] The implementation principle of this embodiment is as follows: The drive mechanism 10 drives the first magnet 24 of the first rotating assembly 20 to rotate. The first magnet 24 interacts with the second magnet 34 of the second rotating assembly 30 through a magnetic field, driving the impeller 32 to rotate, thus achieving fluid transport. This magnetic drive method avoids the direct connection of transmission components in traditional transmission methods, reducing transmission eccentricity problems. This avoids abnormal wear, lubrication failure, and heat accumulation between the shaft core 35 and the first bearing 122, improving the working stability of the impeller pump. Simultaneously, it reduces impeller 32 operational imbalance, vibration, and noise, lowers the possibility of interference between the impeller 32 and the pump casing inner wall or other components, extends the impeller pump's service life, and reduces product failure rate and maintenance costs.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An improved structure for an impeller pump, characterized in that, include: The drive mechanism (10) includes a connecting shaft (11), a transmission shaft (12) and a drive assembly (13). The transmission shaft (12) is connected to the connecting shaft (11), and the drive assembly (13) is sleeved on the connecting shaft (11) to drive the connecting shaft (11) and the transmission shaft (12) to rotate. The first rotating assembly (20) includes a fixed cover (21), a metal frame (22), a retaining ring (23), and a first magnet (24). The end of the drive shaft (12) away from the drive assembly (13) is inserted into the fixed cover (21). The metal frame (22) is sleeved on the drive shaft (12) and located in the fixed cover (21). The retaining ring (23) is sleeved in the first groove (121) of the drive shaft (12) and located in the fixed cover (21) to abut against the metal frame (22). The first magnet (24) is attracted to the metal frame (22) and abuts against the retaining ring (23) for rotating with the drive shaft (12). The second rotating component (30) is located at the end of the first rotating component (20) away from the drive component (13), and includes a pump lower cover (31), an impeller (32), a pump upper cover (33), and a second magnet (34). The pump lower cover (31) and the pump upper cover (33) are fitted together to form a rotating space. The pump lower cover (31) is connected to the end of the fixed cover (21) away from the drive shaft (12). A shaft core (35) is injection molded inside the pump lower cover (31). The impeller (32) is located in the rotating space and is sleeved on the shaft core (35). The second magnet (34) has a magnetic field direction opposite to that of the first magnet and is injection molded inside the impeller (32) for rotating with the first magnet (24). The connector (40) is fitted with an inlet and outlet (331) on the pump cover (33), and a channel (41) is provided on the connector (40) to pass through the inlet and outlet (331).

2. The improved impeller pump structure according to claim 1, characterized in that, Also includes: A fixing seat (50) is sleeved on the connecting shaft (11) to fix the connecting shaft (11) to an external component.

3. The improved impeller pump structure according to claim 2, characterized in that, The drive shaft (12) is fitted with a first bearing (122) and a second bearing (123). The fixed seat (50) is provided with a limiting groove (51) for accommodating the first bearing (122). The second bearing (123) is located in the fixed cover (21) at the end of the metal frame (22) away from the retaining ring (23).

4. The improved impeller pump structure according to claim 1, characterized in that, The second rotating assembly (30) further includes a ceramic bushing (37) and a metal plate (38) located at the axis of the impeller (32). One end face of the ceramic bushing (37) abuts against the metal plate (38) and is tightly fitted with the impeller (32), and is slidably fitted with the shaft core (35), wherein the shaft core (35) passes through the ceramic bushing (37) and abuts against the metal plate (38).

5. The improved impeller pump structure according to claim 1, characterized in that, The drive assembly (13) includes a pulley (131) and a transmission belt (132). The pulley (131) is sleeved on the connecting shaft (11), and the transmission belt (132) is sleeved on the pulley (131) and the external transmission wheel to drive the pulley (131) to rotate.

6. The improved impeller pump structure according to claim 1, characterized in that, A first sealing ring (36) is provided at the mating point of the pump lower cover (31) and the pump upper cover (33), and the pump lower cover (31) and the pump upper cover (33) are ultrasonically fused together.

7. The improved impeller pump structure according to claim 1, characterized in that, The fixing cover (21) is placed on the pump lower cover (31), and the two are provided with a plurality of fixing holes (211) for fixing by screws.

8. The improved impeller pump structure according to claim 1, characterized in that, The inlet and outlet (331) is fitted with a second sealing ring (39), and the corresponding inlet and outlet (331) is provided with a second groove (3311) for accommodating the second sealing ring (39).

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