A shaftless permanent magnet motor rotor support

Abstract

The utility model relates to motor technical field especially a kind of shaftless permanent-magnet motor rotor support.The utility model discloses a rotor brake disc for cooperating with brake device, the side of rotor brake disc is fixed with cylindrical adapter section, the end surface of adapter section is fixed with first ring plate, there is second ring plate between first ring plate and rotor brake disc, the outer diameter of first ring plate and second ring plate is same, and the outer end surface of first ring plate and second ring plate is welded with magnetic pole mounting ring, and magnetic pole mounting ring is used to install magnetic pole.The shaftless permanent-magnet motor rotor support is connected with the cooperation of brake rotor by rotor brake disc, its structure design includes cylindrical adapter section for transmitting torque and supporting rotor assembly, first ring plate and second ring plate jointly constitute double-layer annular support structure to enhance overall stiffness, and through the design of same outer diameter, ensure that stress is uniform.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor support for a shaftless permanent magnet motor. Background Technology

[0002] In recent years, semi-direct drive technology has become one of the mainstream technologies for large wind turbine generators. Existing semi-direct drive generator rotor supports generally suffer from structural and manufacturing problems. Current semi-direct drive generator rotor supports are integrally machined from welded components such as the diaphragm, stiffening ribs, and cylinder. To transmit the braking and turning torque of the non-drive side main shaft of the motor, it is often necessary to weld an extension section and a rear flange. However, due to structural limitations, the diameter of the extension section is limited, thus restricting the torque it can transmit. Furthermore, while the stiffening ribs effectively improve the overall radial stiffness in this structure, they often generate unwanted turbulent airflow when the motor rotor rotates at high speed, severely affecting the cooling airflow circulation and leading to problems such as increased or uneven motor temperature.

[0003] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a shaftless permanent magnet motor rotor support, which would make it more valuable for industrial applications. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a shaftless permanent magnet motor rotor support.

[0005] This utility model discloses a shaftless permanent magnet motor rotor support, which includes a rotor brake disc for cooperating with a braking device. A cylindrical transition section is fixed on one side of the rotor brake disc, and a first ring plate is fixed on the end face of the transition section. A second ring plate is located between the first ring plate and the rotor brake disc. The outer diameters of the first ring plate and the second ring plate are the same, and magnetic pole mounting rings are welded to the outer end faces of the first ring plate and the second ring plate. The magnetic pole mounting rings are used to mount magnetic poles.

[0006] The rotor support of the shaftless permanent magnet motor is connected to the brake rotor through the rotor brake disc. Its structural design includes a cylindrical transition section for transmitting torque and supporting the rotor assembly. The first ring plate and the second ring plate together form a double-layer ring support structure to enhance the overall rigidity. The design with the same outer diameter ensures uniform force distribution. The magnetic pole mounting ring welded to the outer end face is used to fix the permanent magnet poles to form a complete magnetic circuit system, realizing the electromagnetic torque transmission function of the shaftless motor.

[0007] Furthermore, the surface of the magnetic pole mounting ring is composed of uniformly spaced radial mounting blocks for magnetic poles. Each radial mounting block has multiple waist-shaped mounting holes evenly arranged on it. There is a recessed positioning groove between two adjacent radial mounting blocks, and each positioning groove has multiple fixing holes.

[0008] The magnetic pole mounting ring forms a magnetic pole fixing position through the evenly spaced radial mounting blocks on the surface. Multiple waist-shaped mounting holes on each radial mounting block are used to flexibly adjust the radial mounting position of the magnetic pole to accommodate permanent magnets of different specifications. The concave positioning groove between adjacent radial mounting blocks provides a precise circumferential positioning reference. Multiple fixing holes in the positioning groove are used to lock the magnetic pole assembly and ensure the stability of the overall structure during high-speed rotation.

[0009] Furthermore, each radial mounting block of the magnetic pole has an outwardly protruding axial mounting block of the magnetic pole at its end.

[0010] The outwardly protruding axial mounting block at the end of the radial mounting block provides an axial support structure. Its protruding feature forms an axial positioning reference with adjacent components, ensuring the radial mounting accuracy of the magnetic poles while reliably fixing the axial position, thus ensuring the stable assembly of the permanent magnet in three-dimensional space.

[0011] Furthermore, an installation ring is welded to the inner wall of the transition section, and an adapter plate is fixed to the installation ring by bolts. An installation plate is fixed to the adapter plate by bolts, and through holes for installation are evenly arranged on the installation plate.

[0012] The mounting ring welded to the inner wall of the transition section serves as the basic support structure. The axial force transmission transition is achieved through the bolted transition plate. The mounting plate fixed by bolts on it forms the terminal installation interface. Its evenly arranged through holes provide modular assembly interfaces. The entire set of components constitutes a layered mechanical connection system, which ensures structural rigidity while achieving standardized docking of the motor with other transmission components.

[0013] Furthermore, the middle section of the transition section has multiple inspection holes along its outer edge, allowing maintenance personnel to pass through.

[0014] The multiple inspection holes set along the outer edge of the middle section of the transition section are ergonomically designed to serve as passageways for maintenance personnel to enter and exit the equipment. This allows for visual inspection and rapid repair of key components such as the magnetic pole assembly and cooling system inside the equipment, while ensuring structural strength.

[0015] Furthermore, a sealing plate is installed on the outer ring of the inspection hole via bolts and nuts.

[0016] The bolt-fixed sealing plate can be quickly installed and removed, ensuring the motor is sealed and dustproof, and facilitating inspection and maintenance.

[0017] Furthermore, a gear ring is installed on the inner side of the rotor brake disc.

[0018] The gear ring on the inner side of the rotor brake disc is used for speed monitoring. It works in conjunction with a sensor to achieve non-contact speed measurement, while also enhancing the rigidity of the brake disc to ensure safe braking of the equipment.

[0019] Furthermore, multiple reinforcing plates with identical structures are welded between the rotor brake disc and the transfer section.

[0020] The reinforcing plate welded between the rotor brake disc and the transition section is used to strengthen the connection, prevent deformation, and ensure stable force transmission.

[0021] By means of the above-described solution, the present invention has at least the following advantages:

[0022] 1. Improved torque transmission capability: The traditional extension section and rear flange structure are eliminated, and the braking / distrusion torque is directly transmitted through the rotor brake disc, breaking through the original diameter limitation and significantly enhancing the torque carrying capacity.

[0023] 2. Airflow optimization and temperature rise improvement: Abandoning the traditional stiffener design, an open magnetic pole mounting ring structure is adopted, which effectively reduces airflow disturbance during high-speed rotation, ensures smooth circulation of cooling airflow, reduces motor temperature rise and improves temperature uniformity, and enhances operational reliability.

[0024] 3. Structural stiffness optimization: The double-layer ring support structure (first ring plate + second ring plate) combined with the welding design of rotor brake disc, transition section and magnetic pole mounting ring greatly improves the overall rigidity and stability, resisting deformation under high-speed rotation.

[0025] The reinforcing plate between the rotor brake disc and the transition section further strengthens the connection, prevents deformation, and ensures a stable force transmission path.

[0026] 4. Modular assembly and simplified manufacturing: The internal layered connection system (mounting ring-adapter plate-mounting plate) uses standard bolt connections to achieve modular and standardized docking of the motor with other transmission components, simplifying the assembly process.

[0027] The overall structure is simpler, reducing the complexity and cost of welding and overall machining.

[0028] 5. Precision installation and convenient maintenance of magnetic poles: The magnetic pole mounting ring design (radial mounting block, waist-shaped hole, positioning groove, axial mounting block) provides high-precision, adjustable radial and circumferential references and achieves reliable axial fixation, ensuring stable assembly of the magnetic poles.

[0029] Bolted sealing plates enable quick opening and closing of maintenance access channels, balancing protection level with ease of maintenance (non-destructive drilling).

[0030] 6. Enhanced functionality and reliability: The rotor brake disc integrates a gear ring on its inner side, which enhances the rigidity of the disc body while directly providing a non-contact speed monitoring interface, simplifying the structure and improving braking safety.

[0031] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a utility model Figure 1 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the structure of the present invention after removing the irritation mounting ring; Figure 5 This is the utility model Figure 4 Another perspective illustration; In the diagram: 1. Rotor brake disc; 2. Transition section; 3. First ring plate; 4. Second ring plate; 5. Magnetic pole mounting ring; 6. Magnetic pole radial mounting block; 7. Waist-shaped mounting hole; 8. Positioning groove; 9. Fixing hole; 10. Magnetic pole axial mounting block; 11. Mounting ring; 12. Transition plate; 13. Mounting plate; 14. Inspection hole; 15. Sealing plate; 16. Gear ring; 17. Reinforcing plate. Detailed Implementation

[0034] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0035] See Figure 1 and Figure 4The shaftless permanent magnet motor rotor support transmits braking torque through direct engagement between the rotor brake disc 1 and the brake rotor. The cylindrical transition section 2 serves as the core force transmission component, connecting all components. The first ring plate 3 and the second ring plate 4 form a double-layer ring support structure with equal outer diameter, evenly distributing the load and enhancing overall rigidity. The magnetic pole mounting ring 5 welded to its outer end provides a fixing interface for the permanent magnet, forming a highly efficient magnetic circuit. The traditional shaft system structure is eliminated, simplifying the force transmission path and improving torque transmission efficiency. The double-layer ring plate design significantly improves radial stiffness and reduces high-speed rotational deformation. The modular magnetic pole mounting ring supports rapid assembly and maintenance. The overall welded structure reduces processing complexity and improves reliability.

[0036] Because the magnetic pole mounting ring 5 is provided with radial support by two ring plates, the rotor does not cause any disturbance to the radial ventilation and heat dissipation circulating airflow when rotating at high speed.

[0037] See Figure 3 The magnetic pole mounting ring 5 provides magnetic pole fixing positions through the uniformly distributed radial mounting blocks 6. Its waist-shaped mounting holes 7 allow for radial fine adjustment to accommodate permanent magnets of different sizes. The positioning grooves 8 and fixing holes 9 between adjacent mounting blocks form a precise circumferential positioning and fastening system. The waist-shaped hole design realizes flexible assembly tolerance compensation, the positioning grooves 8 ensure the circumferential uniformity of magnetic poles, and the multiple fixing holes enhance the structural stability under high-speed rotation. The overall layout takes into account both installation flexibility and operational reliability.

[0038] See Figure 3 The magnetic pole axial mounting block 10 at the end of the radial mounting block 6 provides an axial positioning reference through its outward protruding structure, forming a mechanical stop with the adjacent components. This ensures the radial mounting accuracy of the magnetic poles while achieving axial limiting and fixing. The protruding feature of the axial mounting block 10 can serve as an assembly guide structure to improve installation efficiency, and can also resist axial electromagnetic force through rigid support, preventing axial displacement of the permanent magnet during high-speed operation, thereby ensuring the all-round stability of the magnetic pole assembly in three-dimensional space.

[0039] See Figure 1 and Figure 2 The mounting ring 11 welded to the inner wall of the transition section 2 serves as a basic support. The transition plate 12 and the mounting plate 13 are connected in sequence by bolts to form a modular axial expansion structure. The welding and fixing of the mounting ring 11 ensures high strength load-bearing capacity. The bolted connection between the transition plate 12 and the mounting plate 13 enables quick disassembly and maintenance. The through-hole layout of the mounting plate 13 is compatible with various end equipment interfaces. The overall design takes into account both structural strength and assembly flexibility.

[0040] See Figure 2 and Figure 4 The inspection hole 14 located on the outer edge of the middle section of the transition section 2 is a circular channel with a diameter of not less than 600mm, allowing maintenance personnel wearing safety equipment to pass through in both directions.

[0041] See Figure 5 The outer ring of the inspection hole 14 is formed by a sealing plate 15 fixed with bolts and nuts to form a detachable closed structure. The sealing plate 15 achieves IP54 protection through flange connection. The bolt preload ensures sealing reliability under vibration conditions. A rubber sealing strip is also attached between the sealing plate 15 and the inner wall of the transition section 2 to effectively improve the sealing performance.

[0042] During personnel maintenance, a hoisting device is inserted into the rotor bracket to engage the gripping claw mechanism of the sealing plate 15 with the protrusion on the inner side of the sealing plate 15, providing hoisting force. After removing the bolts at the outer end, the sealing plate 15 can be removed from the inspection hole 14, facilitating personnel access for maintenance. After maintenance is completed, personnel exit through the inspection hole 14, and an electromagnet mechanism is used to attract the sealing plate 15 and pull it closer to the inspection hole. The bolts are then tightened to complete the locking and fixing.

[0043] See Figure 4 The gear ring 16 mounted on the inner side of the rotor brake disc 1 adopts a double fixing method of interference fit and high-strength bolts. The gear ring 16 cooperates with the gear of the corresponding drive brake mechanism to provide braking for the rotor.

[0044] See Figure 1 , 2 4 and 5, the rotor brake disc 1 and the transition section 2 are fully welded together by symmetrically distributed reinforcing plates 17. The triangular reinforcing plate 17 structure effectively suppresses radial deformation under braking conditions. This design achieves the stability of power transmission in the rotor system.

[0045] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A shaftless permanent magnet motor rotor support, comprising a rotor brake disc (1) for cooperating with a braking device, characterized in that: A cylindrical transition section (2) is fixed on one side of the rotor brake disc (1). A first ring plate (3) is fixed on the end face of the transition section (2). A second ring plate (4) is between the first ring plate (3) and the rotor brake disc (1). The outer diameters of the first ring plate (3) and the second ring plate (4) are the same. A magnetic pole mounting ring (5) is welded to the outer end face of the first ring plate (3) and the second ring plate (4). The magnetic pole mounting ring (5) is used to mount magnetic poles.

2. The shaftless permanent magnet motor rotor support according to claim 1, characterized in that: The surface of the magnetic pole mounting ring (5) is a uniformly spaced radial mounting block (6) of magnetic poles. Each radial mounting block (6) has multiple waist-shaped mounting holes (7) evenly arranged on it. There is a recessed positioning groove (8) between two adjacent radial mounting blocks (6). Each positioning groove (8) has multiple fixing holes (9).

3. The shaftless permanent magnet motor rotor support according to claim 2, characterized in that: Each magnetic pole radial mounting block (6) has an outwardly protruding magnetic pole axial mounting block (10) at its end.

4. The shaftless permanent magnet motor rotor support according to claim 1, characterized in that: An installation ring (11) is welded to the inner wall of the transition section (2). An adapter plate (12) is fixed to the installation ring (11) by bolts. An installation plate (13) is fixed to the adapter plate (12) by bolts. Through holes for installation are evenly arranged on the installation plate (13).

5. A shaftless permanent magnet motor rotor support according to claim 1, characterized in that: The middle section of the transition section (2) has multiple inspection holes (14) that allow maintenance personnel to pass through.

6. The shaftless permanent magnet motor rotor support according to claim 5, characterized in that: A sealing plate (15) is installed on the outer ring of the inspection hole (14) by bolts and nuts.

7. The shaftless permanent magnet motor rotor support according to claim 1, characterized in that: A gear ring (16) is installed on the inner side of the rotor brake disc (1).

8. The shaftless permanent magnet motor rotor support according to claim 1, characterized in that: Multiple reinforcing plates (17) with identical structures are welded between the rotor brake disc (1) and the transfer section (2).

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