Bipolar one-way impeller rotor

Abstract

The utility model discloses a two-pole one-way impeller rotor which comprises a rotor frame, a magnetic ring arranged on the rotor frame in a sleeved mode and an impeller arranged at one end of the rotor frame, and the impeller comprises an impeller seat arranged at the end of the rotor frame and a plurality of elastic blades arranged on the upper end face of the impeller seat in a circle. Each elastic blade comprises a fixed part fixed on the impeller seat and an elastic part which is connected with the fixed part and is separated from the impeller, and the impeller is provided with a positioning part which can be blocked by the elastic part when the elastic part deforms under the impact of water flow when the impeller rotates. According to the utility model, the blades are divided into the fixed parts and the elastic parts, the fixed parts are connected with the impeller seat, the elastic parts bend and extend in the direction far away from the center of the rotor frame and can elastically deform and displace when being impacted by water flow, and the elastic blades flexibly deform to absorb local impact load, relieve root stress concentration and reduce fatigue fracture risk; therefore, the rotor is large in lift, large in drainage flow, high in efficiency and long in service life.

Description

Technical Field

[0001] This utility model relates to a two-pole unidirectional impeller rotor. Background Technology

[0002] Traditional water pump rotors are typically driven by permanent magnet synchronous motors, and their blade designs are mostly based on a vertical-radial layout to ensure basic pumping functionality in both forward and reverse rotation. However, this design has significant technical drawbacks: First, the symmetrical vertical blades cannot effectively guide fluid flow in unidirectional operation, leading to turbulent flow paths and low energy conversion efficiency. Second, due to bidirectional compatibility requirements, the blade curvature and upstream surface are not adequately optimized, resulting in limited head and unstable discharge capacity, making it difficult to meet the demands of high-load conditions. Furthermore, during long-term operation, the uneven distribution of dynamic loads on the blades in traditional rotors easily induces vibration and noise, further reducing equipment reliability and service life.

[0003] To address the aforementioned issues, some unidirectional rotor structures have emerged on the market, such as the one-way rotor structure disclosed in Chinese utility model patent application number CN201020249799.5. This water pump rotor optimizes the water flow guidance characteristics by combining arc-shaped blades with a unidirectional rotation design, thereby improving the water pump's drainage efficiency and head to a certain extent. However, such unidirectional rotor structures still have potential technical bottlenecks. Due to stress concentration effects at the root of the arc-shaped blades, fatigue fracture is prone to occur under high-speed rotation or sudden loads, shortening the service life.

[0004] Therefore, this utility model was created based on the above-mentioned shortcomings. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a two-stage unidirectional impeller rotor that is simple in structure, highly efficient and has a long service life.

[0006] This utility model is achieved through the following technical solution:

[0007] A bipolar unidirectional impeller rotor, characterized in that: it includes a rotor frame 1, a magnetic ring 2 sleeved on the rotor frame 1, and an impeller 3 disposed at one end of the rotor frame 1. The impeller 3 includes an impeller seat 31 disposed at the end of the rotor frame 1 and a plurality of elastic blades 32 arranged in a circle on the upper surface of the impeller seat 31. The elastic blades 32 include a fixing part 322 fixed on the impeller seat 31 and an elastic part 321 connected to the fixing part 322 and separated from the impeller 3. The impeller 3 is provided with a positioning part 41 that can be used to block the elastic part 321 when the impeller 3 rotates and the elastic part 321 is deformed under the impact of water flow.

[0008] The two-pole unidirectional impeller rotor described above is characterized in that: the impeller seat 31 is provided with a plurality of positioning grooves 4 corresponding one-to-one with the elastic blades 32 and into which the elastic part 321 extends, and the positioning part 41 is the inner sidewall of the positioning groove 4.

[0009] The two-pole unidirectional impeller rotor described above is characterized in that: the lower ends of the plurality of elastic parts 321 extend into the corresponding positioning grooves 4, and the elastic parts 321 are spaced apart from the two opposing inner sidewalls of the positioning grooves 4.

[0010] The bipolar unidirectional impeller rotor described above is characterized in that: the elastic blade 32 is an arc-shaped blade, and the two sides of the elastic blade 32 are respectively a concave curved surface and a convex curved surface, the concave curved surface is oriented towards the rotation direction of the impeller 3, and the positioning part 41 includes a first positioning wall 411 that is opposite to the concave curved surface and can abut against the concave curved surface and a second positioning wall 412 that is opposite to the convex curved surface and can be abutted by the deformed elastic part 321. The first positioning wall 411 has the same curvature as the concave curved surface, and the curvature of the second positioning wall 412 is greater than the curvature of the elastic blade 32.

[0011] The two-pole unidirectional impeller rotor as described above is characterized in that: the impeller seat 31 includes an impeller shaft 311 mounted on the rotor frame 1 and an impeller plate 312 provided on the outer peripheral wall of the impeller shaft 311; a plurality of positioning grooves 4 are evenly distributed circumferentially around the axis of the impeller shaft 311; a plurality of elastic blades 32 are evenly distributed circumferentially around the axis of the impeller shaft 311; and one end of the fixing part 322 is connected to the impeller shaft 311 and the impeller plate 312.

[0012] The two-pole unidirectional impeller rotor described above is characterized in that: the rotor frame 1 extends out of the impeller 3 at the end away from the magnetic ring 2, and a wear-resistant ring 5 is provided on the end of the rotor frame 1, with the end face of the wear-resistant ring 5 being higher than the end face of the rotor frame 1.

[0013] The two-pole unidirectional impeller rotor described above is characterized in that: a shaft hole 11 is provided at the center of the rotor frame 1, and a plurality of wear-resistant inner tubes 6 are provided in the shaft hole 11 for rotatably mounting on the rotor shaft.

[0014] The two-pole unidirectional impeller rotor described above is characterized in that: two wear-resistant inner tubes 6 are provided and are respectively located at both ends of the rotor frame 1.

[0015] The two-pole unidirectional impeller rotor described above is characterized in that: the magnetic ring 2 is a two-pole permanent magnet with its magnetic poles symmetrically distributed.

[0016] The two-pole unidirectional impeller rotor described above is characterized in that: the elastic blade 32 is an arc-shaped blade, and the plurality of elastic blades 32 are arranged in a vortex shape.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. In this utility model, the blade is divided into a fixed part and an elastic part. The fixed part is connected to the impeller seat, and the elastic part bends and extends away from the center of the rotor frame. When impacted by water flow, it can elastically deform and displace. The flexible deformation of the elastic blade absorbs local impact load, relieves root stress concentration, and reduces the risk of fatigue fracture. This makes the rotor have a large head, large drainage flow, high efficiency, and long service life.

[0019] 2. In this utility model, the impeller seat is provided with a positioning groove as a limiting device. The inner wall of the positioning groove is provided with a first positioning wall and a second positioning wall. The maximum deformation displacement of the elastic part is limited by the double positioning wall structure, and the maximum deformation of the elastic part is controlled within a safe range to avoid excessive bending of the blades and stress concentration at the root when the water flow impacts.

[0020] 3. In this utility model, a wear-resistant ring is provided at the end of the rotor frame that protrudes from the impeller. Its end face is higher than the end face of the rotor frame and can directly bear the radial load to avoid direct wear between the rotor and the bearing. Moreover, a wear-resistant inner tube is provided at each end of the shaft hole to cooperate with the rotor shaft and reduce rotational friction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a top view of the present invention;

[0023] Figure 3 yes Figure 2 Sectional view at point AA. Detailed Implementation

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

[0025] like Figures 1 to 3 As shown, a bipolar unidirectional impeller rotor includes a rotor frame 1, a magnetic ring 2 sleeved on the rotor frame 1, and an impeller 3 located at one end of the rotor frame 1. The impeller 3 includes an impeller seat 31 located at the end of the rotor frame 1 and multiple elastic blades 32 arranged in a circle on the upper surface of the impeller seat 31. Each elastic blade 32 includes a fixed part 322 fixed to the impeller seat 31 and an elastic part 321 connected to the fixed part 322 and separated from the impeller 3. The impeller 3 is provided with a positioning part 41 that can provide support for the elastic part 321 when it deforms under the impact of water flow during impeller 3 rotation. Under the impact of water flow, the rotor can elastically deform and displace, absorbing local impact loads through the flexible deformation of the elastic blades, alleviating root stress concentration, reducing the risk of fatigue fracture, and enabling the rotor to have a large head, large drainage flow, high efficiency, and long service life.

[0026] Specifically, the impeller seat 31 is provided with a plurality of positioning grooves 4 corresponding one-to-one with the elastic blades 32 and into which the elastic part 321 extends. The positioning part 41 is the inner sidewall of the positioning groove 4. The positioning groove 4 is an open groove.

[0027] Specifically, the lower ends of multiple elastic parts 321 extend into the corresponding positioning grooves 4. The two opposing inner sidewalls of the elastic parts 321 and the positioning grooves 4 are spaced apart, that is, the opening width of the positioning groove is greater than the width of the elastic arc-shaped blade 32. A gap is provided between the positioning wall 41 and the elastic parts 321 to provide space for elastic deformation.

[0028] Specifically, the elastic blade 32 is an arc-shaped blade, and multiple elastic blades 32 are arranged in a vortex shape. The two sides of the elastic blade 32 are a concave surface and a convex surface, respectively. The concave surface faces the rotation direction of the impeller 3. The positioning part 41 includes a first positioning wall 411 opposite to and able to abut against the concave surface, and a second positioning wall 412 opposite to the convex surface and able to allow the deformed elastic part 321 to abut against. The first positioning wall 411 has the same curvature as the concave surface, and the curvature of the second positioning wall 412 is greater than the curvature of the elastic blade 32. The concave surface of the elastic arc-shaped blade 32 is the upstream surface, and the convex surface is the downstream surface. When the water flow impacts the upstream side, the elastic part 321 opens to the second positioning wall 412 and remains open to drive the water; when the water flow impacts the reverse side, the elastic part bends towards the center to the first positioning wall 411, and the maximum deformation is controlled within 5mm. By limiting the maximum deformation displacement of the elastic part through the double positioning wall structure, the maximum deformation of the elastic part is controlled within a safe range, avoiding excessive bending of the blades during water flow impact, which would lead to stress concentration at the root.

[0029] like Figure 2 As shown, the impeller housing 31 includes an impeller shaft 311 mounted on the rotor frame 1 and an impeller plate 312 disposed on the outer peripheral wall of the impeller shaft 311. Multiple positioning grooves 4 are evenly distributed circumferentially around the axis of the impeller shaft 311 on the impeller plate 312. Multiple elastic blades 32 are evenly distributed circumferentially around the axis of the impeller shaft 311, and one end of the fixing part 322 is connected to both the impeller shaft 311 and the impeller plate 312. The elastic parts 321 on the multiple elastic arc-shaped blades 32 correspond one-to-one with the positioning grooves. The fixing part 322 of the elastic arc-shaped blades 32 simultaneously connects the impeller shaft and the impeller plate, enhancing the connection strength. In a specific implementation, six elastic arc-shaped blades 32 are evenly distributed circumferentially, and correspondingly, six positioning grooves are evenly distributed circumferentially. Of course, the number of elastic arc-shaped blades 32 and positioning grooves can be designed according to needs to adapt to different speeds and load conditions and meet market demands.

[0030] like Figure 3As shown, the impeller 3 extends from the end of the rotor frame 1 away from the magnetic ring 2. A wear-resistant ring 5 is provided on the extending end of the rotor frame 1. The end face of the wear-resistant ring 5 is higher than the end face of the rotor frame 1, allowing it to directly contact the inner wall of the water pump or the inner ring of the bearing, directly bearing the radial load and preventing direct wear between the rotor and the bearing. In specific implementations, the wear-resistant ring 5 can be made of ceramic. Ceramic material has good wear resistance and corrosion resistance, which can effectively extend the service life of the rotor.

[0031] Furthermore, the rotor frame 1 has a shaft hole 11 at its center, and several wear-resistant inner tubes 6 are provided inside the shaft hole 11 for rotatably mounting on the rotor shaft, cooperating with the rotor shaft to reduce rotational friction. In specific implementations, the wear-resistant inner tubes 6 can be made of ceramic, as ceramic material has good wear resistance and corrosion resistance, which can effectively extend the service life of the rotor.

[0032] Specifically, there are two wear-resistant inner tubes 6, which are respectively located at both ends of the rotor frame 1 to form a stable rotational support and balance the radial force on the shaft, so that the rotor can run smoothly.

[0033] In this invention, the magnetic ring 2 is a two-pole permanent magnet with symmetrically distributed magnetic poles. It works in conjunction with the motor stator to achieve stable unidirectional drive, thus avoiding the magnetic field disorder problem of traditional multi-pole magnetic rings.

Claims

1. A two-pole unidirectional impeller rotor, characterized by: The impeller (3) includes a rotor frame (1), a magnetic ring (2) sleeved on the rotor frame (1), and an impeller (3) located at one end of the rotor frame (1). The impeller (3) includes an impeller seat (31) located at the end of the rotor frame (1) and a plurality of elastic blades (32) arranged in a circle on the upper surface of the impeller seat (31). The elastic blades (32) include a fixing part (322) fixed on the impeller seat (31) and an elastic part (321) connected to the fixing part (322). The impeller (3) is provided with a positioning part (41) that can be used to block the elastic part (321) when the impeller (3) rotates and the elastic part (321) is deformed under the impact of water flow.

2. A two-pole, one-way impeller rotor according to claim 1, characterized in that: The impeller seat (31) is provided with a plurality of positioning grooves (4) that correspond one-to-one with the elastic blades (32) and into which the elastic part (321) extends. The positioning part (41) is the inner sidewall of the positioning groove (4).

3. The two-pole unidirectional impeller rotor according to claim 2, characterized in that: The lower ends of the plurality of elastic parts (321) extend into the corresponding positioning grooves (4), and the two opposing inner sidewalls of the elastic parts (321) and the positioning grooves (4) are spaced apart.

4. The two-pole unidirectional impeller rotor according to claim 3, characterized in that: The elastic blade (32) is an arc-shaped blade. The two sides of the elastic blade (32) are a concave surface and a convex surface, respectively. The concave surface faces the rotation direction of the impeller (3). The positioning part (41) includes a first positioning wall (411) that is opposite to the concave surface and can abut against the concave surface, and a second positioning wall (412) that is opposite to the convex surface and can be abutted by the deformed elastic part (321). The first positioning wall (411) has the same curvature as the concave surface, and the curvature of the second positioning wall (412) is greater than the curvature of the elastic blade (32).

5. The two-pole unidirectional impeller rotor according to claim 2, characterized in that: The impeller seat (31) includes an impeller shaft (311) mounted on a rotor frame (1) and an impeller plate (312) provided on the outer peripheral wall of the impeller shaft (311). A plurality of positioning grooves (4) are evenly distributed circumferentially around the axis of the impeller shaft (311) and a plurality of elastic blades (32) are evenly distributed circumferentially around the axis of the impeller shaft (311) and one end of the fixing part (322) is connected to the impeller shaft (311) and the impeller plate (312).

6. The two-pole, one-way impeller rotor of claim 1, wherein: The rotor frame (1) extends out of the impeller (3) at the end away from the magnetic ring (2). A wear-resistant ring (5) is provided on the end of the rotor frame (1), and the end face of the wear-resistant ring (5) is higher than the end face of the rotor frame (1).

7. The two-pole, one-way impeller rotor of claim 1, wherein: The rotor frame (1) has a shaft hole (11) at its center, and the shaft hole (11) contains several wear-resistant inner tubes (6) that are rotatably mounted on the rotor shaft.

8. The two-pole unidirectional impeller rotor according to claim 7, characterized in that: The wear-resistant inner tube (6) is provided in two parts and is respectively located at both ends of the rotor frame (1).

9. The two-pole, one-way impeller rotor of claim 1, wherein: The magnetic ring (2) is a two-pole permanent magnet with its magnetic poles symmetrically distributed.

10. The two-pole, one-way impeller rotor of claim 1, wherein: The elastic blade (32) is an arc-shaped piece, and multiple elastic blades (32) are arranged in a vortex shape.

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