A high-balance rotor shaft and rotor

Abstract

The utility model discloses a high-balance rotor shaft and a rotor. The high-balance rotor shaft is a three-step shaft body integrally formed from top to bottom, including a shaft extension step at the top, a threaded step at the middle and a fixed step at the bottom. The whole body of the threaded step is provided with external threads along the circumferential direction. The circumferential surfaces of the shaft extension step and the fixed step are smooth. A circle of bearing bracket grooves is provided inwardly at the lower end of the fixed step. The shaft diameters of the shaft extension step, the threaded step and the fixed step increase in sequence, and the length of the fixed step is greater than the axial length of the shaft extension step and the threaded step. This product improves the overall operation stability and reliability of the rotor.

Description

Technical Field

[0001] The utility model relates to a rotor shaft and a rotor, in particular to a highly balanced rotor shaft and a rotor. Background Art

[0002] The motor rotor is the main rotating part of the motor, which makes the motor work by transmitting power. The rotor is usually made of magnetic conductive materials, such as iron core, aluminum alloy, etc. The rotation of the motor rotor generates mechanical energy, converts electrical energy into mechanical kinetic energy, and drives the load to work. The rotor shaft is the key part connecting the motor rotor and the load. It bears the important role of transmitting power and load. It is usually made of high-strength materials, such as steel or alloy materials. The motor rotor transmits the rotational torque to the load through the rotor shaft to make it work. The quality and design of the rotor shaft directly affect the stability and efficiency of the transmission. Unbalanced or unstable rotor shafts will cause vibration, noise and energy efficiency loss. The balance of the rotor shaft is very important for the operation of the motor. Unbalanced rotation of the rotor shaft will cause increased vibration and noise, which will not only affect the performance and life of the motor itself, but may also cause damage to surrounding equipment and structures.

[0003] Since the rotor shaft is subject to the force and torque transmitted by the motor to the load, the strength of the rotor shaft determines whether it can maintain stable operation under the load and resist the influence of external forces and torque. At the same time, the rotor shaft requires a reasonable bearing installation position, and correct assembly is essential for the stable operation of the motor; in addition, the vibration of other components of the motor system, such as the bearing seat, housing, etc., will also be transmitted to the rotor shaft and affect the stable operation of the shaft. Utility Model Content

[0004] In order to solve the deficiencies existing in the above-mentioned technologies, the utility model provides a highly balanced rotor shaft and a rotor.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is a high-balanced rotor shaft. The high-balanced rotor shaft is a three-step shaft body integrally formed from top to bottom, including a shaft extension step at the upper part, a threaded step at the middle part and a fixed step at the lower part. The threaded step is provided with an external thread along the circumferential direction throughout the body. The circumferential surfaces of the shaft extension step and the fixed step are smooth, and a circle of bearing support grooves is provided inwardly at the lower end of the fixed step; the shaft diameters of the shaft extension step, the threaded step and the fixed step increase successively, and the length of the fixed step is greater than the axial length of the shaft extension step and the threaded step.

[0006] A rotor with a highly balanced rotor shaft is provided with a bearing bracket on a fixed step, the inner ring of a rotating bearing on the bearing bracket is interference fit with the outer ring of the bearing bracket, and the bearing bracket is provided with a plurality of fastening bolts for being fixedly connected with a motor housing.

[0007] Furthermore, a No. 1 bearing, a No. 2 bearing and a base are arranged in the center of the fixed step except for the bearing bracket groove. The base is located between the No. 1 bearing and the No. 2 bearing for installing the rotor core and the rotor winding. The inner ring of the No. 1 bearing, the inner ring of the No. 2 bearing and the inner ring of the base are all interference fit with the outer ring of the fixed step.

[0008] Furthermore, the lower part of the base is provided with a circle of outwardly protruding retaining ring, and a plurality of reinforcing screws for reinforcing the rotor core are arranged on the retaining ring along the circumferential direction.

[0009] Furthermore, a threaded positioning sleeve is matched and arranged on the thread step, the threaded positioning sleeve comprises a threaded connection portion, the threaded positioning sleeve has an internal thread matching the external thread, and the threaded connection portion is threadedly connected to the thread step.

[0010] Furthermore, the threaded positioning sleeve also includes a fixing portion integrally connected to the threaded connecting portion, and a plurality of screw through holes are provided on the fixing portion along the circumferential direction perpendicular to the axial direction of the high-balance rotor shaft, and fixing screws are matchedly arranged in the screw through holes, and when the fixing screws are screwed to the bottom of the screw through holes, they abut against the outer ring of the shaft extension step.

[0011] The utility model discloses a high-balance rotor shaft and a rotor. The rotor shaft has a high structural stability through a three-step shaft body integrally formed from top to bottom; the relatively small diameter of the upper shaft extension step can provide a certain flexibility and vibration reduction function, which helps to reduce the occurrence of vibration and deformation; the middle threaded step and the lower fixed step increase the rigidity and stability of the rotor shaft;

[0012] The bearing bracket groove is provided on the fixed step, and the bearing bracket provides stable support and positioning for the rotor shaft; the bearing bracket supports the rotating bearing on the rotor shaft, ensuring the accurate positioning of the rotating bearing and the rotor shaft, thereby preventing it from loosening or deflecting during operation; at the same time, through the connection of the fixing bolts, a stable connection is formed between the bearing bracket and the motor housing, further improving the stability and reliability of the rotor shaft;

[0013] The base is located between bearing No. 1 and bearing No. 2, and is used to install the rotor core and rotor winding; the setting of the base provides a stable fixing platform, so that the rotor core and rotor winding can be accurately installed and positioned at the predetermined position; through the setting of reinforcement screws, the base can also provide additional stability and protection for the rotor core, reducing the occurrence of vibration and deformation; this stable installation helps to improve the overall operating stability and reliability of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure explosion of the utility model Figure 1 .

[0015] Figure 2Schematic diagram of the structure explosion of the utility model Figure 2 .

[0016] In the figure: 1. shaft extension step; 2. threaded step; 3. fixing step; 4. bearing bracket; 5. No. 1 bearing; 6. No. 2 bearing; 7. base; 8. retaining ring; 9. threaded positioning sleeve; 31. bearing bracket groove; 41. fastening bolt; 81. reinforcing screw; 91. threaded connection part; 92. fixing part; 10. screw through hole; 11. screw through hole. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] like Figure 1 and Figure 2 A high-balanced rotor shaft is shown, which is a three-step shaft body integrally formed from top to bottom, including a shaft extension step 1 at the upper part, the shaft extension step 1 is used as an output shaft installed at the motor end and is responsible for transmitting torque to the load, a threaded step 2 at the middle part and a fixed step 3 at the lower part, the threaded step 2 is provided with external threads along the circumferential direction, the shaft extension step 1 and the fixed step 3 have smooth circumferential surfaces, and the lower end of the fixed step 3 is provided with a circle of bearing support grooves 31 inwardly; the shaft diameters of the shaft extension step 1, the threaded step 2 and the fixed step 3 increase in sequence, and the length of the fixed step 3 is greater than the axial length of the shaft extension step 1 and the threaded step 2. The shaft extension step 1 is located at the upper part of the rotor shaft, and its smaller diameter has smaller stiffness than the threaded step 2 and the fixed step 3, so it may help to provide structural stability of the rotor shaft and inhibit vibration and deformation of the rotor shaft. The fixed step 3 is the lower part of the high-balance rotor shaft. The rotor shaft transmits the load force and torque to other main parts of the rotor through the fixed step 3, thereby realizing the work of the load and transmitting power. Compared with the shaft extension step 1 and the threaded step 2, the fixed step 3 has a relatively large stiffness, which can reduce the occurrence of vibration and deformation and maintain the stable operation of the rotor shaft. The fixed step 3 is provided with a bearing bracket groove 31 for installing a bracket that stabilizes the stable operation of the rotor shaft. The above functions ensure the normal operation and high reliability of the rotor shaft.

[0019] like Figure 1The figure also discloses a rotor with a high-balance rotor shaft, wherein a bearing bracket 4 is arranged on the fixed step 3, and the inner ring of the rotating bearing on the bearing bracket 4 is interference-fitted with the outer ring of the bearing bracket 4, and the bearing bracket 4 is provided with a plurality of fastening bolts 41 for being fixedly connected with the motor housing. The bearing bracket 4 is a component fixed on the high-balance rotor shaft, and its main function is to support and maintain the connection between the rotor shaft and the rotating bearing. The bearing bracket 4 ensures the accurate positioning of the bearing on the rotor shaft by fixing the position of the rotating bearing, and prevents it from loosening or shifting during operation. At the same time, the bearing bracket 4 can also provide partial protection to prevent damage to the bearing by external substances and the environment; it is used to be fixedly connected with the motor housing to ensure the stable connection between the rotor shaft and the motor system, which helps to maintain the stability and reliability of the entire motor system, and can reduce the displacement of the motor caused by vibration, thereby reducing the vibration amplitude. It should be noted that a buffer device, such as an elastic element, a shock absorber, etc., can be provided inside the bearing bracket to absorb the vibration energy generated during the operation of the motor. Through this energy conversion, the vibration amplitude is reduced, thereby reducing the negative impact of the motor vibration on the entire system.

[0020] The fixed step 3 is partially aligned with the shaft except for the bearing bracket groove 31, and the No. 1 bearing 5, the No. 2 bearing 6 and the base 7 are arranged. The base 7 is located between the No. 1 bearing 5 and the No. 2 bearing 6 for installing the rotor core and the rotor winding. The lower part of the base 7 has a circle of outwardly convex retaining ring 8, and the retaining ring 8 is provided with a plurality of reinforcing screws 81 for reinforcing the rotor core along the circumferential direction. The common parts of the rotor core, the rotor winding and the rotor are not shown in the figure. The inner ring of the No. 1 bearing 5, the inner ring of the No. 2 bearing 6 and the inner ring of the base 7 are all interference fit with the outer ring of the fixed step 3. The rotor core and the rotor winding are installed through the base 7, and the core components of the rotor are assembled on the base, making the manufacturing process simpler and more efficient. At the same time, when the rotor parts need to be repaired or replaced, it is more convenient to disassemble and install the entire base together with the rotor, saving the time and cost of repair and maintenance. In addition, to provide better assembly accuracy and stability, the rotor core and winding are precisely positioned and aligned on the base in advance to ensure the correct position of the rotor core and winding on the rotor shaft, which can reduce assembly errors and improve the running stability of the entire rotor system. The base also helps to reduce the vibration and deformation caused by directly installing the rotor core and rotor winding, and improve the reliability and life of the rotor.

[0021] A threaded positioning sleeve 9 is matched with the threaded step 2, and the threaded positioning sleeve 9 includes a threaded connection portion 91, and the threaded positioning sleeve 9 has an internal thread matching the external thread, and the threaded connection portion 91 is threadedly connected to the threaded step 2. The threaded positioning sleeve 9 also includes a fixing portion 92 integrally connected to the threaded connection portion 91, and a plurality of screw through holes 10 are provided on the fixing portion 92 along the circumferential direction perpendicular to the axial direction of the high-balance rotor shaft, and a fixing screw 11 is matched with the screw through hole 10. When the fixing screw 11 is screwed to the bottom of the screw through hole 10, it abuts against the outer ring of the shaft extension step 1, and the threaded positioning sleeve 9 has the function of preventing axial displacement of parts.

[0022] The above implementation modes are not limitations of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the technical solution of the present invention also belong to the protection scope of the present invention.

Claims

1. A highly balanced rotor shaft, characterized in that: The high-balance rotor shaft is a three-step shaft body integrally formed from top to bottom, comprising a shaft extension step (1) at the top, a threaded step (2) at the middle, and a fixed step (3) at the bottom, wherein the threaded step (2) is provided with external threads along the circumferential direction throughout the body, the shaft extension step (1) and the fixed step (3) have smooth circumferential surfaces, and the lower end of the fixed step (3) is provided with a circle of bearing support grooves (31) inwardly; the shaft diameters of the shaft extension step (1), the threaded step (2), and the fixed step (3) increase in sequence, and the length of the fixed step (3) is greater than the axial lengths of the shaft extension step (1) and the threaded step (2).

2. A rotor having a high-balance rotor shaft according to claim 1, characterized in that: A bearing bracket (4) is arranged on the fixed step (3); the inner ring of the rotating bearing on the bearing bracket (4) is interference-fitted with the outer ring of the bearing bracket (4); and the bearing bracket (4) is provided with a plurality of fastening bolts (41) for being fixedly connected to the motor housing.

3. The rotor of the high-balance rotor shaft according to claim 2, characterized in that: The fixed step (3) is partially aligned with a bearing (5), a bearing (6) and a base (7) on the shaft except for the bearing bracket groove (31). The base (7) is located between the bearing (5) and the bearing (6) to install the rotor core and the rotor winding. The inner ring of the bearing (5), the inner ring of the bearing (6) and the inner ring of the base (7) are all interference fit with the outer ring of the fixed step (3).

4. The rotor of the high-balance rotor shaft according to claim 3, characterized in that: The lower part of the base (7) is provided with a circle of outwardly convex retaining ring (8), and a plurality of reinforcing screws (81) for reinforcing the rotor core are arranged on the retaining ring (8) along the circumferential direction.

5. The rotor of the highly balanced rotor shaft according to claim 2 or 3, characterized in that: A threaded positioning sleeve (9) is matched and arranged on the threaded step (2). The threaded positioning sleeve (9) comprises a threaded connection portion (91). The threaded positioning sleeve (9) has an internal thread matching the external thread. The threaded connection portion (91) is threadedly connected to the threaded step (2).

6. The rotor of the highly balanced rotor shaft according to claim 5, characterized in that: The threaded positioning sleeve (9) also includes a fixing portion (92) integrally connected to the threaded connection portion (91); a plurality of screw through holes (10) are provided on the fixing portion (92) along the circumferential direction perpendicular to the axial direction of the high-balance rotor shaft; a fixing screw (11) is matched and arranged in the screw through hole (10); and when the fixing screw (11) is screwed to the bottom of the screw through hole (10), it abuts against the outer ring of the shaft extension step (1).

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