A new type of electric centrifugal impeller power output structure

Abstract

The present invention relates to a novel electric centrifugal impeller power output structure. The present invention includes an impeller, a rotor core, a permanent magnet, a stator core, a rotating shaft, and a driving device. The impeller and the rotor core are integrally formed. The impeller includes a first mounting sleeve and impeller blades. The rotor core includes an iron core body and a second mounting sleeve provided on the iron core body. The impeller blades are axially distributed along the first mounting sleeve and then connected to one end of the iron core body. The permanent magnet is provided at the other end of the iron core body. The stator core is provided on one side of the permanent magnet. One end of the rotating shaft passes through the stator core, the second mounting sleeve, and the first mounting sleeve in sequence, and then is connected to the impeller. The other end of the rotating shaft is connected to the output end of the driving device. By integrally forming the impeller and the rotor core, the present invention can reduce the axial space of the motor, make the structure compact, reduce the number of motor parts, reduce costs, and reduce the difficulty of product assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal fluid pumps and centrifugal compressors, and in particular to a novel electric centrifugal impeller power output structure. Background Art

[0002] The main power of traditional centrifugal pumps or centrifugal compressors comes from the centrifugal impeller power output structure. The motor is mostly a radial flux motor and the impeller and the iron core are each a part. The existing centrifugal impeller structure is as follows Figure 1 As shown, the motor consists of a stator core 110, a winding 120, a rotating shaft 130, and an impeller 140. Due to the ends of the winding 120 on both sides of the stator core 110, the impeller 140 cannot be integrated with the stator core 110 and must be separated into two parts. Furthermore, the motor occupies a large axial space and cannot be compressed. This results in low axial dimensional flexibility for this motor structure, occupies a large amount of axial space in the assembly, and results in a large assembly volume, which reduces product competitiveness. Furthermore, the radial flux motor impeller is limited by the winding coil and cannot be integrated into a single part with the core. The impeller and rotor assembly must be paired and dynamically balanced, and the relative position of the impeller and rotor must be fixed after dynamic balancing is completed, which increases the difficulty of component packaging, transportation, storage, and assembly. Furthermore, the excessive number of components reduces system reliability. Summary of the Invention

[0003] The purpose of the present invention is to provide a novel electric centrifugal impeller power output structure to reduce the axial space of the motor, reduce the overall volume, reduce the number of motor parts, and improve reliability.

[0004] In order to solve the above technical problems, the present invention provides a new electric centrifugal impeller power output structure, including an impeller, a rotor core, a permanent magnet, a stator core, a rotating shaft and a driving device. The impeller and the rotor core are integrally formed, the impeller includes a first mounting sleeve and impeller blades, the rotor core includes an iron core body and a second mounting sleeve arranged on the iron core body, the impeller blades are axially distributed along the first mounting sleeve and connected to one end of the iron core body, the permanent magnet is arranged at the other end of the iron core body, the stator core is arranged on one side of the permanent magnet, and one end of the rotating shaft passes through the second mounting sleeve and the first mounting sleeve in sequence and is connected to the impeller.

[0005] In one embodiment of the present invention, the impeller and the rotor core are both made of amorphous alloy.

[0006] In one embodiment of the present invention, the driving device is an axial flux motor.

[0007] In one embodiment of the present invention, the radius of the impeller blade gradually increases in a direction from the first mounting sleeve toward the second mounting sleeve.

[0008] In one embodiment of the present invention, the radius of the first mounting sleeve is connected to that of the second mounting sleeve.

[0009] In one embodiment of the present invention, the radius of the first mounting sleeve is equal to the radius of the second mounting sleeve.

[0010] In one embodiment of the present invention, one end of the rotating shaft is connected to a locking nut, and the one end of the rotating shaft passes through the second mounting sleeve and the first mounting sleeve in sequence and is connected to the impeller through the locking nut.

[0011] In one embodiment of the present invention, a mounting groove cooperating with the permanent magnet is provided at the other end of the rotor core body.

[0012] In one embodiment of the present invention, the core body is a cylindrical structure.

[0013] In one embodiment of the present invention, the permanent magnets are evenly distributed along the circumference of the center of the other end of the core body.

[0014] The above technical solution of the present invention has the following advantages over the prior art:

[0015] The novel electric centrifugal impeller power output structure described in this invention integrates the impeller and rotor core into one piece, reducing the axial space in the motor, resulting in a compact structure. This reduces the number of motor parts, particularly seals, resulting in a smaller overall structure and improved reliability. Furthermore, the impeller's outer diameter is not restricted by the motor winding ends, offering greater design flexibility. In subsequent dynamic balancing processes, this structure can reduce the number of parts tested by 50%, lowering costs. It also eliminates the need for paired storage of the impeller and rotor, as well as the complexity of restricting their relative position during assembly. This facilitates the transportation, storage, and packaging of product parts and reduces the difficulty of product assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0017] Figure 1 It is a schematic diagram of the existing centrifugal impeller structure.

[0018] Figure 2 It is a schematic diagram of the power output structure of the electric centrifugal impeller of the present invention.

[0019] Figure 3 This is a structural diagram of the integrated impeller and rotor core of the present invention.

[0020] Figure 4 It is a half-section perspective view of the integrated structure of the impeller and rotor core of the present invention.

[0021] Figure 5 It is a diagram of the permanent magnet installation structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the exploded structure of the electric centrifugal impeller power output structure of the present invention.

[0023] Figure 7 It is a schematic diagram of the maximum outer diameter of the impeller and the outer diameter of the core body in one embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the maximum outer diameter of the impeller and the outer diameter of the core body in another embodiment of the present invention.

[0025] Explanation of the reference numerals in the accompanying drawings in the specification: 110, stator core 1; 120, winding 1; 130, rotating shaft 1; 140, impeller 1; 1, impeller; 11, first mounting sleeve; 12, impeller blade; 2, rotor core; 21, core body; 211, mounting groove; 22, second mounting sleeve; 3, permanent magnet; 4, stator core; 5, rotating shaft; 6, locking nut. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] Reference Figures 2 to 6 As shown, the present invention is a novel electric centrifugal impeller power output structure, comprising an impeller 1, a rotor core 2, a permanent magnet 3, a stator core 4, a rotating shaft 5 and a driving device, wherein the impeller 1 and the rotor core 2 are integrally formed, the impeller 1 comprises a first mounting sleeve 11 and an impeller blade 12, the rotor core 2 comprises an iron core body 21 and a second mounting sleeve 22 provided on the iron core body 21, the impeller blade 12 is axially distributed along the first mounting sleeve 11 and then connected to one end of the iron core body 21, the permanent magnet 3 is provided at the other end of the iron core body 21, the stator core 4 is provided on one side of the permanent magnet 3, and one end of the rotating shaft 5 passes through the second mounting sleeve 22 and the first mounting sleeve 11 in sequence and then is connected to the impeller 1.

[0028] Specifically, the driving device is an axial flux motor, and the materials of the impeller 1 and the rotor core 2 are both amorphous alloys. The overall integration of the impeller 1 and the rotor can be achieved through the existing casting method, and the axial flux motor is selected as the power source. It can not only compress the axial space of the motor, reduce the volume and the number of parts, and improve reliability, but also improve the motor performance due to its higher magnetic permeability and lower loss, thereby making the assembly transmission efficiency higher. At the same time, the outer diameter of the impeller 1 is not limited by the end of the motor winding, and has higher design flexibility.

[0029] Specifically, the radius of the impeller blade 12 gradually increases in a direction from the first mounting sleeve 11 toward the second mounting sleeve 22 .

[0030] Specifically, the radius of the first mounting sleeve 11 is connected to that of the second mounting sleeve 22 .

[0031] Specifically, the radius of the first mounting sleeve 11 is equal to the radius of the second mounting sleeve 22 .

[0032] Specifically, one end of the rotating shaft 5 is connected to a locking nut 6 , and the one end of the rotating shaft 5 passes through the second mounting sleeve 22 and the first mounting sleeve 11 in sequence and is then connected to the impeller 1 through the locking nut 6 .

[0033] Specifically, the other end of the core body 21 is provided with a mounting groove 211 that cooperates with the permanent magnet 3 .

[0034] Specifically, the core body 21 is a cylindrical structure. Figure 7 、 Figure 8 As shown, the maximum outer diameter of the impeller 1 can be equal to the outer diameter of the core body 21, and the outer diameter of the impeller 1 can also be adjusted according to the assembly flow pressure ratio requirements, so that the outer diameter of the impeller 1 is not limited by the motor winding end, which has higher design flexibility.

[0035] Specifically, the permanent magnets 3 are evenly distributed along the circumference of the center of the other end of the core body.

[0036] By integrally forming the impeller 1 and the rotor core 2, the present invention can reduce the axial space of the motor, resulting in a compact structure. This reduces the number of motor parts, particularly the number of seals, resulting in a smaller overall structural volume and improved reliability. Furthermore, the outer diameter of the impeller 1 is not restricted by the ends of the motor windings, allowing for greater design flexibility. In subsequent dynamic balancing processes, this structure can reduce the number of parts to be measured by 50%, lowering costs. It also eliminates the need to store the impeller 1 and rotor in pairs and the complexity of restricting their relative position during assembly, facilitating the transportation, storage, and packaging of product parts and reducing the difficulty of product assembly.

[0037] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A new type of electric centrifugal impeller power output structure, characterized in that: The invention comprises an impeller (1), a rotor core (2), a permanent magnet (3), a stator core (4), a rotating shaft (5) and a driving device, wherein the impeller (1) and the rotor core (2) are integrally formed, the impeller (1) comprises a first mounting sleeve (11) and an impeller blade (12), the rotor core (2) comprises an iron core body (21) and a second mounting sleeve (22) provided on the iron core body (21), the impeller blade (12) is axially distributed along the first mounting sleeve (11) and then connected to one end of the iron core body (21), the permanent magnet (3) is provided at the other end of the iron core body (21), the stator core (4) is provided on one side of the permanent magnet (3), one end of the rotating shaft (5) passes through the second mounting sleeve (22) and the first mounting sleeve (11) in sequence, and then is connected to the impeller (1), and the other end of the rotating shaft (5) is connected to the output end of the driving device; The driving device is an axial flux motor; The radius of the impeller blade (12) gradually increases in a direction from the first mounting sleeve (11) toward the second mounting sleeve (22); The radius of the first mounting sleeve (11) is connected to that of the second mounting sleeve (22).

2. A novel electric centrifugal impeller power output structure according to claim 1, characterized in that: The impeller (1) and the rotor core (2) are both made of amorphous alloy.

3. The novel electric centrifugal impeller power output structure according to claim 1 is characterized in that: The radius of the first mounting sleeve (11) is equal to the radius of the second mounting sleeve (22).

4. A novel electric centrifugal impeller power output structure according to claim 1, characterized in that: One end of the rotating shaft (5) is connected to a locking nut (6), and one end of the rotating shaft (5) passes through the second mounting sleeve (22) and the first mounting sleeve (11) in sequence and is connected to the impeller (1) through the locking nut (6).

5. The novel electric centrifugal impeller power output structure according to claim 1 is characterized in that: The other end of the iron core body (21) is provided with a mounting groove (211) that cooperates with the permanent magnet (3).

6. The novel electric centrifugal impeller power output structure according to claim 1 is characterized in that: The iron core body (21) is a cylindrical structure.

7. A novel electric centrifugal impeller power output structure according to claim 6, characterized in that: The permanent magnets (3) are evenly distributed along the circumference of the center of the other end of the iron core body (21).

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