A bearing assembly structure for a rotor motor
By using a DC brushless motor and long bearing design, the problems of high energy consumption and poor stability of traditional rotor drive structures have been solved, achieving a highly efficient and stable spinning process and improving yarn quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXING HONGBO ELECTROMECHANICAL CO LTD
- Filing Date
- 2025-03-19
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional rotor drive structures suffer from high energy consumption, poor speed stability, high maintenance costs, and poor adaptability to different fibers during air-jet spinning. Furthermore, traditional bearing designs are prone to vibration and misalignment at high speeds, affecting spinning quality and lifespan.
It adopts a DC brushless motor and long bearing design, combined with optimized electromagnetic design and intelligent speed regulation function. It reduces power loss through high-efficiency electronic components, achieves precise speed control, and provides a larger support area through long bearing to reduce vibration and offset, ensuring the concentricity and stability of the rotor.
It improves spinning efficiency and quality, reduces energy consumption, extends bearing life, simplifies maintenance, meets the needs of high-speed spinning, and features high efficiency, rapid response, and high stability.
Smart Images
Figure CN224289471U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spinning equipment technology, specifically to a bearing assembly structure for a rotor motor. Background Technology
[0002] Air-jet spinning, also known as rotor spinning, is a spinning technology that uses airflow to draft, cohede, and twist fibers into yarn. Unlike traditional ring spinning, it does not use spindles. Instead, it utilizes components such as carding rollers, spinning cups, and false twisting devices to achieve the spinning process. In air-jet spinning, the carding rollers grip and card the fed cotton sliver fibers, using centrifugal force generated by high-speed rotation to eject the fibers. The spinning cup is a key component; the centrifugal force generated inside the cup expels air, drawing the cotton fibers into the cup based on the principle of fluid pressure, forming a fiber flow that moves continuously along the inner wall of the cup. Air-jet spinning is characterized by high spinning speed, large yarn lap size, wide adaptability, and a simple structure. Furthermore, because it eliminates the need for spindles, rings, and travelers, it significantly increases the yield of fine yarn. Air-jet spun yarn has a more porous structure than ring-spun yarn, exhibiting characteristics such as abrasion resistance, evenness, and vibrant dyeing, but its strength is relatively lower. This type of yarn is mainly used for woven fabrics such as plain weave, fleece, and knitted garments.
[0003] In the air-jet spinning process, the performance of the rotor drive mechanism plays a crucial role in spinning quality and efficiency. Traditional rotor drive structures have many problems, such as high energy consumption, poor speed stability, high maintenance costs, and poor adaptability to different fibers. With the continuous development of textile technology, higher requirements are placed on the rotor drive structure in air-jet spinning components. It needs to have characteristics such as high efficiency and energy saving, precise speed regulation, stable operation, and ease of maintenance to meet increasingly demanding production needs and quality standards.
[0004] As a key component, the performance of bearings directly affects the operational stability, energy consumption, and lifespan of rotor motors. Traditional short bearing designs are prone to vibration and misalignment during high-speed operation, leading to a decrease in rotor concentricity and consequently affecting spinning quality. This limitation is even more pronounced under high-speed, high-load, and high-temperature environments, where traditional bearings often face creep problems between the outer ring and the bearing housing, resulting in increased wear of the bearing housing bore, shorter bearing life, and increased maintenance costs. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model relates to a bearing assembly structure for a rotor motor. This structure is simple, reliable, and effectively solves the above-mentioned technical problems, making it suitable for widespread use. To achieve the above objectives, this utility model is implemented through the following technical solution:
[0006] A bearing assembly structure for a rotor motor includes a housing, a motor shaft, and a rotor. The housing houses a stator assembly and a rotor arranged opposite to each other. The motor shaft is located inside the housing, and its output end is coaxially connected to the rotor to drive its rotation. A support seat is located at the head of the housing, and a cover is mounted on the support seat. The stator assembly includes a core and windings. The core is made of laminated silicon steel sheets. The rotor is cylindrical and made of permanent magnet material, with multi-pole permanent magnets evenly distributed on it. The motor shaft is made of alloy steel. A bearing is also located inside the housing. The motor shaft and bearing rotate coaxially and internally. The bearing is sleeved on the outside of the motor shaft, and its length is greater than half the overall length of the motor shaft. Outer annular grooves are provided on the inner sides of both ends of the bearing. Two inner annular grooves corresponding to the outer annular grooves are provided on the outer surface of the motor shaft. Ball bearings are provided between each set of outer and inner annular grooves.
[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the rotating cup includes a cylindrical support part, a conical support part, a base plate, and a cup shell arranged sequentially from bottom to top. The conical support part of the rotating cup is provided with a plurality of exhaust holes evenly spaced along the circumferential direction. The exhaust holes are inclined downward and communicate with the inner cavity of the rotating cup to the outside.
[0008] Based on the above scheme and as a preferred embodiment of the above scheme: four bolt mounting posts are provided on the outer side of the support base, the inner hole of the bolt mounting post is a threaded hole, the cover is provided with bolt positioning insertion holes corresponding to the bolt mounting posts, the cover and the support base are connected by bolts, a cavity is formed between the cover and the support base, the cavity is connected to the exhaust hole, and a gap is left between the cover and the cup shell of the rotating cup.
[0009] Based on the above scheme and as a preferred embodiment of the above scheme: a cover plate is provided at the rear end of the housing, the cover plate is provided with three bolt mounting holes evenly spaced around the circumference, and the cover plate is connected to the housing by bolt connection.
[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the outer circumferential surface of the bearing is provided with a plurality of annular limiting grooves evenly spaced along the axial direction, and limiting rings are installed in the annular limiting grooves.
[0011] The outstanding and beneficial technical effects of this utility model compared with the prior art are as follows: the shaft of the DC brushless motor is connected to the air-jet spinning rotor assembly, which transmits the rotational power generated by the motor to the rotor. The motor can precisely control the speed by changing the input voltage or current to meet the needs of different spinning processes, improve production efficiency and yarn quality, and has the characteristics of high efficiency, fast response and high stability. This patent adopts an energy-saving optimization design, including optimizing the electromagnetic design of the motor to improve the magnetic field utilization and energy conversion efficiency, using high-efficiency electronic components to reduce the power loss of the drive system, and having an intelligent speed regulation function to automatically adjust the rotor speed according to the spinning process requirements, thereby improving the flexibility and adaptability of the drive.
[0012] The long bearing design provides a larger support area, significantly reducing vibration and misalignment of the motor spindle during high-speed rotation, thereby improving the concentricity and operational stability of the rotor. The long bearing also reduces friction between the bearing and the spindle, reducing energy loss and extending the bearing's service life. Therefore, the long bearing design can effectively improve the overall performance of the rotor motor and meet the needs of high-speed spinning. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure;
[0014] Figure 2 This is a schematic diagram of the cross-sectional structure;
[0015] Figure 3 This is a diagram of a rotating cup;
[0016] Figure 4 This is a schematic diagram of the bearing assembly structure;
[0017] Figure 5 This is a schematic diagram of the inside of the bearing. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.
[0019] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The directions or positional relationships shown are for the purpose of describing this utility model only, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0020] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.
[0021] To solve the above technical problems, such as Figure 1-3 As shown, this utility model designs a DC brushless airflow spinning rotor motor, including a housing 1, a motor shaft 2, and a rotor 3. The housing 1 houses a stator assembly 4 and a rotor 5 arranged opposite to each other. The motor shaft 2 is located inside the housing 1. The stator assembly 4 includes an iron core made of laminated silicon steel sheets, with multiple windings arranged on the core. In this embodiment, a three-phase symmetrical star connection is preferred. The rotor is cylindrical and made of permanent magnet material, with multi-pole permanent magnets evenly distributed on it. The motor shaft is made of alloy steel.
[0022] Based on electromagnetic principles such as the law of electromagnetic induction and Ampere's law, a current-carrying conductor experiences a force in a magnetic field. When a conductor moves within a magnetic field, it generates an induced electromotive force. When the stator windings of a brushless DC motor are energized, a rotating magnetic field is generated. The permanent magnets on the rotor are acted upon by this rotating stator magnetic field, producing torque and causing the rotor to rotate. Optimizing the motor's electromagnetic design improves magnetic field utilization and energy conversion efficiency. Employing high-efficiency electronic components reduces power losses in the drive system.
[0023] In addition, the motor is equipped with an advanced DC brushless drive control system. This system uses a microprocessor as its core to achieve precise control of the motor. Through sensors, it detects parameters such as motor speed, position, and current in real time. According to the preset control algorithm, it adjusts the duty cycle and frequency of the drive signal to achieve smooth start-up, speed regulation, and braking of the motor. At the same time, the system has overcurrent, overvoltage, and overheat protection functions to improve the reliability and safety of the motor. The motor has an intelligent speed regulation function, which automatically adjusts the rotor speed according to the requirements of the spinning process, minimizing energy consumption while ensuring spinning quality.
[0024] The output end of the motor spindle 2 is coaxially connected to the rotor 3 and used to drive the rotor 3 to rotate, which facilitates the installation and disassembly of the rotor and ensures the concentricity of the rotor and the shaft. The shaft of the DC brushless motor is connected to the air-jet spinning rotor 3 assembly, transmitting the rotational power generated by the motor to the rotor 3, causing the rotor 3 to rotate at high speed. The rotational speed of the rotor 3 is crucial to the quality and efficiency of air-jet spinning. The DC brushless motor can provide a stable and adjustable speed. The rotor 3 in air-jet spinning generates centrifugal force through high-speed rotation, causing the fibers to form a cohesive fiber ring inside the rotor 3, thereby realizing spinning. This simplifies the transmission structure, reduces energy loss, and improves spinning efficiency. The motor can precisely control the speed by changing the input voltage or current to meet the needs of different spinning processes, improve production efficiency and yarn quality, and has the characteristics of high efficiency, fast response, and high stability.
[0025] Specifically, the rotor 3 includes a cylindrical support 31, a conical support 32, a base 33, and a cup shell 34 arranged sequentially from bottom to top. The conical support 32 of the rotor 3 is provided with a plurality of exhaust holes 35 evenly spaced along the circumferential direction. The exhaust holes 35 are inclined downward and connect the inner cavity of the rotor 3 to the outside. The exhaust hole design of the rotor 3 helps to control the airflow inside the rotor 3, so that the fibers can flow and condense more smoothly inside the rotor 3, thereby improving the quality of spinning. The downward inclination of the exhaust holes of the rotor 3 helps to remove impurities and short fibers in time, reduce the accumulation of impurities inside the rotor 3, and thus improve the cleanliness and quality of the yarn.
[0026] In addition, a support base 6 is provided at the head of the housing 1, and a cover 7 is provided on the support base 6. Four bolt mounting posts 8 are provided on the outer side of the support base 6. The inner hole of the bolt mounting post 8 is a threaded hole. The cover 7 is provided with bolt positioning holes corresponding to the bolt mounting posts 8. The cover 7 and the support base 6 are connected by bolts. The bolt connection forms a stable structure, ensuring the stability and reliability of the rotor 3 motor when running at high speed. Disassembly is also relatively convenient, facilitating later maintenance. A cavity is formed between the cover 7 and the support base 6, and the cavity communicates with the exhaust port. A gap is left between the seat 7 and the cup shell 34 of the rotor 3. This design optimizes the airflow path, maintains the working environment of the rotor 3, and helps to form a stable airflow environment, so that the fibers can be guided and condensed more smoothly. At the same time, it also helps to reduce the chaotic and disordered movement of fibers inside the rotor 3, improves spinning efficiency and quality. In addition, it can reduce the interference of external airflow on the internal airflow of the rotor 3 and maintain the stability of the internal airflow of the rotor 3. This is very important for improving the uniformity of yarn and reducing yarn defects. It can also reduce noise and fly waste to a certain extent and improve the working environment of the spinning workshop.
[0027] In this embodiment, it is further preferred that the rear end of the housing 1 is provided with a cover plate 10. The cover plate 10 is provided with three bolt mounting holes evenly spaced around the circumference. The cover plate 10 is connected to the housing 1 by bolts. The cover plate 10 can protect the stator and rotor inside the motor and prevent dust, moisture and other impurities from entering the motor, thereby avoiding the reduction or damage to the motor performance. The cover plate 10 and the housing 1 are connected by bolts to form a complete sealed structure, which enhances the structural stability of the entire motor. The setting of the cover plate 10 makes the maintenance and repair of the motor more convenient, because the cover plate 10 can be directly removed to access the internal components of the motor.
[0028] In this embodiment, it is further preferred that the bearing 9 is sleeved on the outside of the motor spindle 2, and the length of the bearing 9 is greater than half the overall length of the motor spindle 2, providing a larger support area and a more uniform load distribution. This reduces the vibration and offset of the motor spindle 2 during high-speed rotation, improves the concentricity and operational stability of the rotor, and the long bearing 9 design also helps to reduce the friction between the bearing 9 and the spindle, reduce energy loss, and extend the service life of the bearing 9. The inner sides of both ends of the bearing 9 are provided with outer arc annular grooves 10, and the outer surface of the motor spindle 2 is provided with two inner arc annular grooves 11 corresponding to the outer arc annular grooves 10. Each set of outer arc annular grooves 10 and inner arc annular grooves 11 is provided with balls 12, realizing rolling friction between the bearing 9 and the spindle instead of sliding friction. This significantly reduces the coefficient of friction, reduces energy loss, thereby reducing noise and heat generation during operation, and improving the durability and reliability of the bearing 9.
[0029] The outer circumferential surface of the bearing 9 is provided with several annular limiting grooves 13 evenly spaced along the axial direction. Limiting rings 14 are installed in the annular limiting grooves 13. This design helps to fix the position of the bearing 9, effectively prevents creep, reduces wear, and lowers maintenance costs. This design also simplifies the installation process because a looser fit can be used, which is convenient for installation and maintenance, and enhances load-bearing capacity and durability.
[0030] It is worth noting that the technical features of rotor components, stator components, etc. involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be conventionally selected in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.
[0031] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made by those skilled in the art based on the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. A bearing assembly structure for a rotor motor, characterized in that: The device includes a housing, a motor spindle, and a rotor. Inside the housing are a stator assembly and a rotor arranged opposite to each other. The motor spindle is located inside the housing, and its output end is coaxially connected to the rotor to drive its rotation. A support base is located at the head of the housing, and a cover is mounted on the support base. The stator assembly includes a core and windings. The core is made of laminated silicon steel sheets. The rotor is cylindrical and made of permanent magnet material, with multi-pole permanent magnets evenly distributed on it. The motor spindle is made of alloy steel. Bearings are also located inside the housing. The motor spindle and bearings are coaxially coupled and rotate inwards and outwards. The bearings are fitted onto the outside of the motor spindle, and their length is greater than half the overall length of the motor spindle. Outer annular grooves are provided on the inner sides of both ends of the bearings. Two inner annular grooves corresponding to the outer annular grooves are provided on the outer surface of the motor spindle. Ball bearings are provided between each set of outer and inner annular grooves.
2. The bearing assembly structure of a rotor motor according to claim 1, characterized in that: The rotating cup includes a cylindrical support part, a conical support part, a base plate, and a cup shell arranged sequentially from bottom to top. The conical support part of the rotating cup is provided with a number of exhaust holes evenly spaced along the circumference. The exhaust holes are inclined downward and communicate with the inner cavity of the rotating cup to the outside.
3. The bearing assembly structure of a rotor motor according to claim 2, characterized in that: The support base has four bolt mounting posts on its outer side. The inner hole of each bolt mounting post is a threaded hole. The cover has bolt positioning holes corresponding to the bolt mounting posts. The cover and the support base are connected by bolts. A cavity is formed between the cover and the support base. The cavity is connected to the exhaust hole. A gap is left between the cover and the cup shell of the rotating cup.
4. The bearing assembly structure of a rotor motor according to claim 1, characterized in that: The rear end of the housing is provided with a cover plate, which has three bolt mounting holes evenly spaced around the circumference. The cover plate is connected to the housing by bolts.
5. The bearing assembly structure of a rotor motor according to claim 1, characterized in that: The outer circumferential surface of the bearing is provided with several annular limiting grooves evenly spaced along the axial direction, and limiting rings are installed in the annular limiting grooves.