A high-efficiency enhanced electric motor rotor

Abstract

This application discloses a high-efficiency enhanced motor rotor, including a central sleeve, a fixing ring, a short-circuit ring, limiting guide bars, and rotor laminations. The rotor laminations are composed of multiple axially snap-fit ​​rotor layers, with limiting bosses between adjacent layers. The rotor layers adopt a sandwich structure of "first rotor lamination layer + rotor ventilation slot plate layer + second rotor lamination layer," with ventilation holes evenly distributed on the ventilation plate to form a three-dimensional heat dissipation channel. This application improves high-speed operation stability and assembly efficiency through the centrifugal force self-tightening fit of the limiting guide bars and teardrop-shaped limiting slots / holes, combined with a modular plug-in design. The heat dissipation efficiency is significantly improved compared to traditional structures, while the motor operating efficiency is also improved, making it suitable for high-speed, high-load motor scenarios.

Description

Technical Field

[0001] This application belongs to the field of motor technology, and specifically relates to a high-efficiency enhanced electric motor rotor. Background Technology

[0002] In the field of motor technology, the rotor, as the core rotating component, directly affects the motor's operating efficiency, power density, and service life due to its heat dissipation performance and structural stability. In existing technologies, traditional rotors mostly adopt an integral laminated structure, forming the rotor core by directly stacking laminations. While this can meet basic electromagnetic performance requirements, it suffers from the following significant drawbacks under high-speed and high-load conditions:

[0003] 1. Insufficient heat dissipation efficiency: Traditional rotor laminations are mostly tightly pressed integrated structures with a lack of effective ventilation channels inside. The heat generated during motor operation is mainly dissipated naturally through the outer casing or by forced cooling by the shaft-end fan. Heat accumulation can easily lead to an increase in core temperature, causing problems such as accelerated insulation aging and decreased magnetic permeability. In severe cases, it can even cause the motor to overheat and shut down.

[0004] 2. Poor structural stability: When rotating at high speed, the rotor laminations are prone to radial displacement or interlayer loosening due to centrifugal force. Traditional fixing methods using keyways or interference fits are difficult to completely suppress vibration. Long-term operation may lead to lamination misalignment and guide bar deformation, which in turn may cause safety hazards such as increased motor noise and dynamic balance failure.

[0005] As industrial motors develop towards higher speeds and higher power densities, the heat dissipation and structural defects of traditional rotors have become bottlenecks restricting the improvement of motor performance. Therefore, developing a rotor structure that combines efficient ventilation and heat dissipation with strong structural stability is of great significance for promoting the advancement of motor technology. Utility Model Content

[0006] This application provides a high-efficiency enhanced electric motor rotor, which solves the problems of low heat dissipation efficiency and poor structural stability of existing rotors through optimized air duct structure and limiting guide bar layout.

[0007] To achieve the above objectives, this application provides the following technical solution: a high-efficiency enhanced motor rotor, including a central sleeve column, with fixed rings at both ends of the central sleeve column, and a short-circuit ring on one side opposite to the two fixed rings. The side of the short-circuit ring away from the fixed ring is provided with multiple insertion holes around its circumference, and a limiting guide strip is inserted into the vertically corresponding insertion holes on the two short-circuit rings. Rotor laminations are arranged through the limiting guide strips.

[0008] The rotor laminations include multiple rotor layers axially snapped into the limiting guide bar, and a limiting boss is inserted between two adjacent rotor layers. The limiting boss is used to divide and support the rotor layers.

[0009] In one embodiment, the rotor stack is a sandwich structure, comprising: a first rotor lamination stack, a rotor ventilation slot plate stack, and a second rotor lamination stack;

[0010] The rotor ventilation slot plate stack is located between the first rotor lamination stack and the second rotor lamination stack.

[0011] In one embodiment, the first rotor lamination stack and the second rotor lamination stack are composed of 5-8 layers of rotor laminations stacked together;

[0012] The rotor ventilation slot plate stack is composed of 1-2 layers of rotor ventilation slot plates stacked together.

[0013] In one embodiment, the rotor stamping lamination includes a first air duct plate, a first sleeve hole is formed on the central axis of the first air duct plate, and the first sleeve hole is sleeved on the central sleeve post;

[0014] Multiple limiting grooves are evenly formed around the circumference of the first air duct plate, and the limiting grooves are connected to the limiting guide strips; a first superimposed hole is formed through two adjacent limiting grooves, and the first superimposed hole is inserted into the limiting boss.

[0015] Multiple first ventilation holes are also provided on the first air duct plate.

[0016] In one embodiment, the rotor ventilation slot plate includes a second air duct plate, and a second sleeve hole is formed on the central axis of the second air duct plate, and the second sleeve hole is sleeved on the central sleeve column;

[0017] Multiple limiting holes are evenly provided around the circumference of the second air duct plate. The limiting holes are connected to the limiting guide strip. A second superimposed hole is provided between two adjacent limiting holes. The second superimposed hole is inserted into the limiting boss. Multiple second ventilation holes are also provided on the second air duct plate.

[0018] In one embodiment, the first air duct plate and the second air duct plate are SPCC cold-rolled steel plates.

[0019] In one embodiment, 70 limiting holes are provided on the second air duct plate;

[0020] The limiting groove is provided in 70 places on the first air duct plate.

[0021] In one embodiment, there are a total of 70 limiting guide strips, and the limiting guide strips are made of copper.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] 1. The aluminum limiting guide bar with a teardrop-shaped cross section is fitted and engaged with the limiting groove and limiting hole. During high-speed rotation, the centrifugal force automatically enhances the fit of the laminated plates. Combined with the axial support of the limiting boss, it significantly improves the structural stability of the rotor and effectively prevents loosening and falling off caused by vibration.

[0024] 2. The rotor stack adopts a sandwich structure of "first lamination stack + ventilation slot plate stack + second lamination stack". Combined with the ventilation holes evenly distributed on each layer of air duct plate, an axially connected three-dimensional heat dissipation channel is constructed, which allows heat to be quickly diffused through air convection, and the heat dissipation efficiency is significantly improved compared with the traditional structure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This application provides an overall schematic diagram of a high-efficiency enhanced electric motor rotor;

[0027] Figure 2 This application provides an enlarged schematic diagram of the rotor A of a high-efficiency enhanced electric motor.

[0028] Figure 3 This application provides an enlarged schematic diagram of the rotor at point B of a high-efficiency enhanced electric motor.

[0029] Figure 4 This application provides a schematic diagram of a rotor stack for a high-efficiency enhanced electric motor rotor;

[0030] Figure 5 A schematic diagram of rotor stamping laminations for a high-efficiency enhanced electric motor rotor provided in this application;

[0031] Figure 6 A schematic diagram of a rotor ventilation slot plate for a high-efficiency enhanced electric motor rotor provided in this application;

[0032] Figure 7 A schematic diagram of a limiting guide bar for a high-efficiency enhanced electric motor rotor provided in this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Fixing ring; 3. Short-circuit ring; 6. Center sleeve; 7. Rotor lamination; 71. Rotor stack; 711. First rotor lamination stack; 712. Rotor ventilation slot plate stack; 713. Second rotor lamination stack; 72. Limiting guide bar; 73. Limiting boss. Detailed Implementation

[0034] See Figures 1 to 7 As shown, this application provides a high-efficiency enhanced motor rotor, including a central sleeve column 6. Both ends of the central sleeve column 6 are provided with fixing rings 1. A short-circuit ring 3 is provided on the opposite side of the two fixing rings 1. Multiple insertion holes are opened around the circumference on the side of the short-circuit ring 3 away from the fixing ring 1. Limiting guide strips 72 are inserted into the vertically corresponding insertion holes on the two short-circuit rings 3. Rotor laminations 7 are provided through the limiting guide strips 72.

[0035] During rotor assembly, the fixing rings 1 at both ends of the central sleeve 6 are respectively fitted onto the two ends of the central sleeve 6, and the fixing rings 1 are fixedly connected to the central sleeve 6 by welding. Then, a short-circuit ring 3 is installed on the opposite side of the fixing ring 1. The limiting guide strips 72 are inserted into the reserved insertion holes on the short-circuit ring 3 in sequence to stabilize and fix the limiting guide strips 72. Thus, the limiting guide strips 72 and the short-circuit ring 3 cooperate to form the support structure of the rotor laminations 7. The rotor laminations 7 are sequentially fitted and locked onto the limiting guide strips 72 until all rotor laminations 7 are installed to form a complete rotor structure.

[0036] It should be noted that the limiting guide bar 72 has a teardrop-shaped cross-section, with its tip pointing towards the axis of the central sleeve 6. This ensures that while it engages with the rotor laminations 7, the centrifugal force increases as the rotor rotates faster, causing the rotor laminations 7 to adhere more closely to the surface of the limiting guide bar 72. This further increases the contact pressure between the rotor laminations 7 and the limiting guide bar 72, effectively preventing loosening and detachment due to vibration during high-speed rotor operation. Furthermore, the insertion hole on the short-circuit ring 3 is fixed to the limiting guide bar 72 using an interference fit or welding method, further enhancing the overall structural stability.

[0037] The rotor lamination 7 includes a plurality of rotor layers 71 axially snapped into the limiting guide bar 72, and a limiting boss 73 is inserted between two adjacent rotor layers 71. The limiting boss 73 is used to divide and support the rotor layers 71.

[0038] The rotor stack 71 engages with the surface of the limiting guide bar 72, and is fixed between adjacent rotor stacks 71 by the limiting boss 73, forming a stable axial support structure between the rotor stacks 71, further improving the overall mechanical strength and stability of the rotor. At the same time, the limiting boss 73 can effectively suppress the relative displacement between the rotor stacks 71 during high-speed rotor rotation, avoiding interlayer slippage caused by centrifugal force, thereby ensuring the reliability and safety of rotor operation.

[0039] Optionally, the rotor stack 71 is a sandwich structure, including: a first rotor lamination stack 711, a rotor ventilation slot plate stack 712, and a second rotor lamination stack 713, wherein the rotor ventilation slot plate stack 712 is located between the first rotor lamination stack 711 and the second rotor lamination stack 713.

[0040] In this embodiment, by placing the rotor ventilation slot plate stack 712 between the first rotor lamination stack 711 and the second rotor lamination stack 713, an internal ventilation channel is formed while ensuring the mechanical strength of the rotor, effectively improving the overall heat dissipation performance of the rotor and further enhancing the operating stability of the motor under high load conditions.

[0041] Optionally, the first rotor lamination stack 711 and the second rotor lamination stack 713 are composed of 5-8 layers of rotor laminations, and the rotor ventilation slot plate stack 712 is composed of 1-2 layers of rotor ventilation slot plates.

[0042] In this embodiment, the first rotor lamination stack 711 and the second rotor lamination stack 713 adopt a multi-layer rotor lamination stacking structure, which can effectively improve the overall mechanical strength and electromagnetic performance of the rotor stack 71. At the same time, the tight fit between the laminations reduces magnetic resistance and improves motor efficiency. The rotor ventilation slot plate stack 712 is composed of 1-2 layers of ventilation slot plates, and has evenly distributed ventilation channels inside, which can form an efficient heat dissipation channel without affecting the rotor strength. This structural design not only improves the overall rigidity of the rotor, but also significantly enhances its stability and reliability under long-term high-load operation, and extends the service life of the motor.

[0043] Optionally, the rotor stamping lamination includes a first air duct plate 7111, with a first sleeve hole 7113 opened on the central axis of the first air duct plate 7111. The first sleeve hole 7113 is fitted onto the central sleeve post 6. A plurality of limiting grooves 7112 are evenly opened around the circumference of the first air duct plate 7111, and the limiting grooves 7112 are connected to the limiting guide strips 72. A first superimposed hole 7115 is opened through between two adjacent limiting grooves 7112, and the first superimposed hole 7115 is inserted into the limiting boss 73. A plurality of first ventilation holes 7114 are also provided on the first air duct plate 7111.

[0044] In this embodiment, by setting a limiting groove 7112 on the first air duct plate 7111 and connecting it with the limiting guide bar 72, the circumferential positioning of the rotor stamping laminations can be effectively achieved, preventing it from shifting or rotating during operation. At the same time, the limiting groove 7112 is similar to the teardrop-shaped cross-section of the limiting guide bar 72, which can effectively improve the fitting accuracy and contact area between the limiting guide bar 72 and the limiting groove 7112. Moreover, the higher the rotor speed, the tighter the fit between the limiting guide bar 72 and the limiting groove 7112 under the action of centrifugal force, thereby further enhancing the stability and reliability of the structure.

[0045] Meanwhile, the insertion design of the first stacking hole 7115 and the limiting boss 73 can effectively achieve precise stacking and fixing of the rotor stamping laminations in the axial direction, avoiding misalignment or loosening of the laminations during assembly, thereby ensuring the compactness and stability of the overall structure. Furthermore, the setting of the first ventilation hole 7114 further improves the overall heat dissipation efficiency of the rotor, enabling the motor to maintain good temperature control performance under high load conditions.

[0046] Optionally, the rotor ventilation slot plate includes a second air duct plate 7121. A second sleeve hole 7124 is opened on the central axis of the second air duct plate 7121. The second sleeve hole 7124 is sleeved on the central sleeve post 6. A plurality of limiting holes 7122 are evenly opened around the circumference of the second air duct plate 7121. The limiting holes 7122 are connected to the limiting guide strip 72. A second superimposed hole 7125 is opened through between two adjacent limiting holes 7122. The second superimposed hole 7125 is inserted into the limiting boss 73. A plurality of second ventilation holes 7123 are also provided on the second air duct plate 7121.

[0047] In this embodiment, by providing a limiting hole 7122 on the second air duct plate 7121 and connecting it with the limiting guide bar 72, the positioning stability of the rotor ventilation slot plate in the circumferential direction is further enhanced. Simultaneously, the cross-sectional structure of the limiting hole 7122 also adopts a teardrop-shaped design matching the limiting guide bar 72. As the rotor speed increases, centrifugal force enhances the fit between the limiting guide bar 72 and the limiting hole 7122, thereby further improving the overall structural reliability and dynamic stability. Furthermore, the insertion fit design between the second stacking hole 7125 and the limiting boss 73 ensures the accuracy and fixing strength of the rotor ventilation slot plates during axial stacking, effectively preventing structural instability caused by misalignment or loosening. At the same time, the design of the second ventilation hole 7123 further improves the overall ventilation efficiency of the rotor, enabling the motor to maintain good heat dissipation under complex operating conditions, thereby effectively extending the motor's service life and improving its operating efficiency.

[0048] Optionally, 70 limiting holes 7122 are formed on the second air duct plate 7121, and 70 limiting grooves 7112 are formed on the first air duct plate 7111. This design ensures that the limiting holes and grooves are evenly distributed in the circumferential direction, thereby ensuring that the rotor is subjected to uniform forces in all directions when rotating at high speed, and avoiding vibration or deformation caused by local stress concentration. At the same time, the uniform distribution of the limiting holes and grooves also allows the centrifugal force of the limiting guide bar at different speeds to be evenly transmitted to the entire structure, further improving the dynamic stability and assembly accuracy of the rotor system.

[0049] Optionally, the first air duct plate 7111 and the second air duct plate 7121 are SPCC cold-rolled steel plates. SPCC cold-rolled steel plates have high strength and good processing performance, which can ensure the structural stability and durability of the air duct plates under high temperature, high humidity and high speed conditions.

[0050] Optionally, there are 70 limiting guide bars 72 in total, and the limiting guide bars 72 are made of copper. The number of limiting guide bars 72 corresponds to the number of limiting holes 7122 and limiting grooves 7112, ensuring that each limiting hole and limiting groove can be precisely aligned, achieving a tight structural fit. The use of aluminum not only reduces the overall weight of the structure but also improves the fatigue resistance of the limiting guide bars during high-speed rotation, ensuring their stability during long-term operation. The good thermal conductivity of aluminum also helps to rapidly dissipate local heat, preventing material performance degradation due to temperature rise.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high efficiency augmented electric motor rotor, characterized by: Includes a central sleeve (6), with fixed rings (1) at both ends of the central sleeve (6), and short-circuit rings (3) on opposite sides of the two fixed rings (1). Multiple insertion holes are opened around the circumference on the side of the short-circuit rings (3) away from the fixed rings (1). Limiting guides (72) are inserted into the vertically corresponding insertion holes on the two short-circuit rings (3), and rotor laminations (7) are arranged through the limiting guides (72). The rotor lamination (7) includes a plurality of rotor layers (71) axially snapped into the limiting guide (72), and a limiting boss (73) is inserted between two adjacent rotor layers (71). The limiting boss (73) is used to divide and support the rotor layers (71).

2. A high efficiency augmented motor rotor according to claim 1, wherein: The rotor stack (71) is a sandwich structure, including a first rotor lamination stack (711), a rotor ventilation slot plate stack (712), and a second rotor lamination stack (713). The rotor ventilation slot plate stack (712) is located between the first rotor lamination stack (711) and the second rotor lamination stack (713).

3. A high efficiency augmented motor rotor according to claim 2, wherein: The first rotor lamination stack (711) and the second rotor lamination stack (713) are composed of 5-8 layers of rotor laminations stacked together; The rotor ventilation slot plate stack (712) is composed of 1-2 layers of rotor ventilation slot plates stacked together.

4. A high efficiency augmented motor rotor according to claim 3 wherein: The rotor stamping plate includes a first air duct plate (7111), and a first sleeve hole (7113) is opened on the central axis of the first air duct plate (7111). The first sleeve hole (7113) is sleeved on the central sleeve post (6). Multiple limiting grooves (7112) are evenly provided around the circumference of the first air duct plate (7111), and the limiting grooves (7112) are connected to the limiting guide strip (72); a first superimposed hole (7115) is provided through between two adjacent limiting grooves (7112), and the first superimposed hole (7115) is inserted into the limiting boss (73); Multiple first ventilation holes (7114) are also provided on the first air duct plate (7111).

5. A high efficiency augmented motor rotor according to claim 4 wherein: The rotor ventilation slot plate includes a second air duct plate (7121), and a second sleeve hole (7124) is opened on the central axis of the second air duct plate (7121). The second sleeve hole (7124) is sleeved on the central sleeve column (6). Multiple limiting holes (7122) are evenly provided around the circumference of the second air duct plate (7121). The limiting holes (7122) are connected to the limiting guide strip (72). A second superimposed hole (7125) is provided between two adjacent limiting holes (7122). The second superimposed hole (7125) is inserted into the limiting boss (73). Multiple second ventilation holes (7123) are also provided on the second air duct plate (7121).

6. A high efficiency augmented motor rotor according to claim 5 wherein: The first air duct plate (7111) and the second air duct plate (7121) are SPCC cold-rolled steel plates.

7. A high efficiency augmented motor rotor as set forth in claim 6 wherein: The limiting holes (7122) are provided in 70 places on the second air duct plate (7121); 70 are formed on the first air duct plate (7111).

8. A high efficiency augmented motor rotor according to claim 1 wherein: 70 limit guide bars (72) are made of copper.

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