Bidirectional pump based on outer rotor driving

Abstract

The invention relates to a two-way pump based on outer rotor driving. The two-way pump comprises a pump body, an impeller-outer rotor assembly, a driving motor stator, a water inlet / outlet A, a water inlet / outlet B, a sealing device, a base and a junction box. A water inlet / outlet A and a water inlet / outlet B are formed in the two sides of the pump body respectively, the driving motor stator is fixedly installed on the inner wall of the pump body, and the impeller-outer rotor assembly is rotatably arranged on the inner side of the driving motor stator, so that a driving motor rotor directly serves as an impeller carrier of the two-way pump, and an outer rotor motor integrated miniaturized structure is formed. Through the integrated design of outer rotor driving, miniaturization, high efficiency and universalization of the two-way pump are achieved, and the two-way pump can be widely applied to the fields of ships, chemical engineering, precision manufacturing and the like.

Description

Technical Field

[0001] The present invention relates to the field of marine fluid machinery technology, and in particular to a bidirectional pump driven by an outer rotor, which is particularly suitable for driving electromagnetic bidirectional water regulating pumps and can realize efficient and compact bidirectional fluid transportation functions. Background Art

[0002] With the advancement of science and technology, various industries are increasingly demanding miniaturized, high-efficiency fluid conveying equipment. However, traditional bidirectional pumps present numerous problems. First, their complex structure typically utilizes a split motor and pump body combination, resulting in large overall size and heavy weight, making them difficult to adapt to miniaturized applications. Second, the motor type is fixed, making it difficult to flexibly select according to different power requirements, and thus unable to meet the diverse application requirements of bidirectional pumps. Third, assembly and maintenance are inconvenient. The split structure results in cumbersome assembly steps and difficulty in subsequent maintenance. Furthermore, traditional bidirectional pumps typically require valves or complex impeller structures to achieve bidirectional flow, resulting in a complex system and reduced reliability.

[0003] Existing related technologies, such as the electronic water pump disclosed in patent document (CN107620714A), while improving efficiency through inner and outer rotors, are unidirectional pumps and lack bidirectional delivery capabilities. Furthermore, the integration between the motor and pump body is low, making it inflexible for different motor types. The mechatronic pump disclosed in patent document (CN207004847U), while integrating the motor and pump body, also provides unidirectional delivery. Furthermore, the impeller-rotor combination fails to leverage the structural advantages of the outer rotor, failing to meet the requirements for efficient bidirectional delivery.

[0004] To this end, the present invention proposes a bidirectional pump driven by an outer rotor, which overcomes the above-mentioned defects through innovative structural design. Summary of the Invention

[0005] The present invention aims to overcome the above-mentioned defects of traditional bidirectional pumps and proposes an integrated small bidirectional pump driven by an outer rotor, which realizes efficient and compact bidirectional fluid delivery function through innovative structural design.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a bidirectional pump driven by an external rotor, comprising a pump body, an impeller-external rotor assembly, a drive motor stator, a water inlet / outlet A, a water inlet / outlet B, a sealing device, a base and a junction box; the water inlet / outlet A and the water inlet / outlet B are respectively provided on both sides of the pump body, the drive motor stator is fixedly installed on the inner wall of the pump body, and the impeller-external rotor assembly can be rotatably arranged on the inner side of the drive motor stator, so that the drive motor rotor directly serves as the impeller carrier of the bidirectional pump, forming an integrated miniaturized structure of the external rotor motor.

[0007] Furthermore, the sealing device is arranged at the joint between the impeller-outer rotor assembly and the pump body, the base is arranged at the bottom of the pump body, and the junction box is integrated at the top of the pump body.

[0008] Furthermore, the impeller-outer rotor assembly adopts an integrated molding process, including an outer rotor body and impeller blades; rotor teeth that cooperate with the stator of the drive motor are embedded inside the outer rotor body, and the impeller blades are evenly distributed along the circumference of the outer rotor body, and the blade profile is designed by bidirectional flow optimization.

[0009] Furthermore, the drive motor stator is manufactured by a lamination process, and a cavity is provided on the back thereof; the pumped fluid can flow through the cavity to achieve direct cooling of the drive motor stator.

[0010] Furthermore, the sealing device is a corrosion-resistant mechanical seal or a magnetic fluid seal, the sealing surface of the sealing device is tightly fitted with the rotating surface of the impeller-outer rotor assembly, and the material of the sealing device is selected according to the characteristics of the conveying medium.

[0011] Furthermore, the junction box has a modular structure, and the motor winding leads, power lines and control signal interfaces are encapsulated inside. The junction box cover is connected to the box body by snaps or bolts and can be disassembled independently for quick maintenance.

[0012] Furthermore, the impeller-outer rotor assembly matches different types of motors, including asynchronous motors and permanent magnet motors, to adapt to different power demand scenarios.

[0013] Furthermore, the base is rigidly connected to the pump body, and a shock-absorbing pad is provided at the bottom of the base to reduce vibration transmission when the pump is running.

[0014] Furthermore, the water inlet / outlet A and the water inlet / outlet B have the same diameter, and flanges or threaded connection structures are provided at the ports, which can be quickly connected to external pipelines.

[0015] Furthermore, it also includes a control system, which is electrically connected to the stator of the drive motor and controls the rotation direction of the impeller-outer rotor assembly by changing the energized phase sequence of the stator winding of the drive motor to achieve bidirectional conveying switching.

[0016] Compared with the prior art, the present invention has the following core innovations and beneficial effects:

[0017] 1. Integrated miniaturized design of the outer rotor motor: The motor and pump body are organically integrated into a compact whole. Utilizing the structural characteristics of the outer rotor motor, the motor rotor directly serves as the impeller carrier of the pump, significantly reducing the space occupied by traditional components such as drive shafts and couplings, meeting the needs of miniaturized application scenarios.

[0018] 2. The outer rotor drive assembly can be matched with different types of motors according to actual power requirements to meet the diverse needs of different scenarios and improve the versatility and applicability of the equipment.

[0019] 3. Integrated Impeller and Motor Outer Rotor Design: To address the limitations of miniaturized structures, the bidirectional pump impeller and motor outer rotor are cleverly integrated. The optimized impeller blades rotate synchronously with the outer rotor's magnetic circuit, ensuring efficient pressurized fluid delivery. Furthermore, leveraging the outer rotor's high torque density, the impeller generates powerful power within a limited space, enabling rapid response during bidirectional switching and effectively improving the efficiency of the bidirectional pump. High efficiency and fast response: The integrated impeller and outer rotor design utilizes the outer rotor's high torque density and an optimized blade profile to enhance bidirectional delivery efficiency. The control system switches rotation direction with rapid response.

[0020] 4. Easy maintenance: The modular junction box can be disassembled independently, and the circuit can be repaired without disassembling the pump body; the sealing device adopts a standardized design, which is easy to replace and reduces maintenance costs.

[0021] 5. High reliability: The motor is directly cooled by the pumped fluid to ensure stable operation under high load; the corrosion-resistant sealing device is suitable for a variety of media to extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the bidirectional pump of the present invention, wherein (a) is a main sectional view and (b) is a side view;

[0023] In the figure: 1- pump body, 2- impeller-outer rotor assembly, 3- drive motor stator, 4- water inlet / outlet A, 5- water inlet / outlet B, 6- sealing device, 7- base, 8- junction box. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings:

[0025] like Figure 1 As shown in (a) and (b) of FIG. 1 , an embodiment of the present invention provides an integrated small bidirectional pump driven by an outer rotor, comprising a pump body 1, an impeller-outer rotor assembly 2, a drive motor stator 3, water inlet / outlet A4, water inlet / outlet B5, a sealing device 6, a base 7, and a junction box 8. The pump body 1 has a compact structure, with various functional components cleverly arranged inside. Inlet / outlet A4 and inlet / outlet B5 are provided on either side of the pump body, respectively, for fluid to enter and exit.

[0026] The drive motor stator 3 is fixedly mounted on the inner wall of the pump body 1. It is manufactured using a laminated process. Its optimized slot structure and winding distribution ensure uniform magnetic field distribution during motor operation, effectively reducing torque pulsation and ensuring stable impeller rotation. Furthermore, the pumped fluid flows through the back cavity of the stator, achieving direct cooling of the motor, eliminating the need for an additional cooling system.

[0027] The impeller-outer rotor assembly 2 is the core component of this invention, manufactured using an integrated molding process. The outer rotor's surface undergoes special treatment to enhance wear resistance and magnetic permeability. Inside, rotor teeth are embedded to mate with the drive motor's stator, forming a highly efficient torque circuit. The impeller blades have been optimized for overall geometric parameters. While meeting high flow requirements, this effectively improves both bidirectional hydraulic efficiency, reduces power consumption, and ensures efficient and stable bidirectional pump operation.

[0028] During operation, the drive motor stator 3 is energized to generate a rotating magnetic field, which interacts with the rotor teeth of the impeller-outer rotor assembly 2, driving it to high-speed rotation. Fluid enters through the inlet (inlet / outlet A4 or inlet / outlet B5), is accelerated and pressurized by the impeller blades, and is ejected through the other outlet. To switch between the two directions, the control system simply changes the phase sequence of the drive motor stator windings. The impeller-outer rotor assembly then reverses, achieving reverse flow and ensuring rapid response for the bidirectional pump.

[0029] The sealing device 6 utilizes corrosion-resistant mechanical seals or magnetic fluid seals, suitable for high-pressure, high-temperature, or corrosive media environments. The base 7 forms a rigid, integral structure with the pump body 1, providing stable support while minimizing the impact of vibration on pump performance. The junction box 8, integrated into the top of the pump body, houses the motor winding leads, power cables, and control signal interfaces. The modular design of the junction box allows for quick access and maintenance, allowing cables or sensors to be replaced without disassembling the pump body, reducing maintenance costs.

[0030] The bidirectional pump of the present invention has the advantages of compact structure, small size, high efficiency, fast response, and easy maintenance through the integrated design of the outer rotor motor and the combination of the impeller and the outer rotor of the motor. It also runs smoothly and has low noise. The motor type can be flexibly selected according to actual power requirements, and has broad market application prospects.

[0031] In summary, the present invention realizes the miniaturization, high efficiency and universality of the bidirectional pump through the integrated design of the outer rotor drive, and can be widely used in the fields of shipbuilding, chemical industry, precision manufacturing, etc.

[0032] The above is a specific implementation scheme of the present invention. The size, material, parameters, type, etc. of each component can be adjusted and optimized according to actual needs without departing from the scope of protection of the present invention.

Claims

1. A bidirectional pump driven by an outer rotor, characterized in that: It includes a pump body, an impeller-outer rotor assembly, a drive motor stator, a water inlet / outlet A, a water inlet / outlet B, a sealing device, a base and a junction box; the water inlet / outlet A and the water inlet / outlet B are respectively provided on both sides of the pump body, the drive motor stator is fixedly installed on the inner wall of the pump body, and the impeller-outer rotor assembly is rotatably arranged on the inner side of the drive motor stator, so that the drive motor rotor directly serves as the impeller carrier of the bidirectional pump, forming an integrated miniaturized structure of the outer rotor motor.

2. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The sealing device is arranged at the matching position of the impeller-outer rotor assembly and the pump body, the base is arranged at the bottom of the pump body, and the junction box is integrated at the top of the pump body.

3. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The impeller-outer rotor assembly adopts an integrated molding process, including an outer rotor body and impeller blades; the outer rotor body is embedded with rotor teeth that cooperate with the stator of the drive motor, and the impeller blades are evenly distributed along the circumference of the outer rotor body, and the blade profile is designed through bidirectional flow optimization.

4. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The drive motor stator is manufactured by a lamination process, and a cavity is provided on the back of the drive motor stator; the pumping fluid can flow through the cavity to achieve direct cooling of the drive motor stator.

5. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The sealing device is a corrosion-resistant mechanical seal or a magnetic fluid seal. The sealing surface of the sealing device is tightly fitted with the rotating surface of the impeller-outer rotor assembly, and the material of the sealing device is selected according to the characteristics of the conveying medium.

6. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The junction box is a modular structure, with motor winding leads, power lines and control signal interfaces encapsulated inside. The junction box cover is connected to the box body by snaps or bolts and can be disassembled independently for quick maintenance.

7. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The impeller-outer rotor assembly matches different types of motors, including asynchronous motors and permanent magnet motors, to adapt to different power demand scenarios.

8. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The base is rigidly connected to the pump body, and a shock-absorbing pad is provided at the bottom of the base to reduce vibration transmission when the pump is running.

9. The bidirectional pump based on outer rotor drive according to claim 1, characterized in that: The water inlet / outlet A and the water inlet / outlet B have the same diameter, and are provided with flanges or threaded connection structures at the ports, which can be quickly connected to external pipelines.

10. The bidirectional pump based on outer rotor drive according to any one of claims 1 to 9, characterized in that: It also includes a control system, which is electrically connected to the stator of the drive motor. The control system controls the rotation direction of the impeller-outer rotor assembly by changing the energized phase sequence of the stator winding of the drive motor to achieve bidirectional conveying switching.

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