High-power low-noise high-speed motor

Abstract

The utility model discloses a high-power low-noise high-speed motor, which is characterized in that an outer shell is nested on the outer cylindrical surface of a stator core, the middle section of a rotor rotating shaft is arranged in the stator core, an output bearing is arranged at the output end of the rotor rotating shaft, and the output bearing is arranged in the outer shell; the tail end of the rotor rotating shaft is provided with a supporting bearing; the bearing support is arranged at the tail end of the rotor rotating shaft and is of a two-section structure, the reference lantern ring is fixed to the outer cylindrical face of the stator iron core in a matched mode, the supporting bearing is installed in the limiting lantern ring, and the limiting lantern ring is fixed to the outer circle of the supporting bearing in a matched mode. The calibration work of the output bearing and the supporting bearing is realized by taking the outer cylindrical surface of the stator core as a positioning reference in a manner of matching the outer shell and the bearing bracket; the concentricity of the front bearing and the rear bearing is improved, and the technical problems that motor vibration and noise are increased due to poor concentricity of the front bearing and the rear bearing, and the bearings are easily damaged after long-time work of the motor are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor structure, and relates to a high-power, low-noise, high-speed motor. Background Art

[0002] In the current high-power and high-speed motor structures on the market, the axial lengths of the stator core and the rotor shaft will increase accordingly. In order to improve the stability of the structure, the existing structure is to support and fix the two ends of the rotor shaft by setting support bearings on both sides of the motor magnetic ring; and the bearings need to be fixed by the front and rear shells. When the axial lengths of the front and rear shells increase, the shape and position tolerances of the shell and the bearing chamber will increase, which will cause the concentricity of the front and rear bearings to deteriorate. When the concentricity of the front and rear bearings of the rotor is poor, it will cause the motor vibration and noise to increase, and the motor is prone to bearing damage when it works for a long time. Utility Model Content

[0003] In order to solve the implementation technical problems, the utility model adopts the following technical solutions:

[0004] A high-power, low-noise, high-speed motor comprises: an outer shell, a stator core, a rotor shaft and a bearing bracket;

[0005] The outer shell is nested and installed on the outer cylindrical surface of the stator core, and the middle section of the rotor shaft is arranged in the stator core. In order to improve the stability of both ends of the rotor shaft, an output bearing is installed on the output end of the rotor shaft, and the output bearing is installed in the outer shell;

[0006] A support bearing is installed at the tail end of the rotor shaft; the bearing bracket is arranged at the tail end of the rotor shaft, and the bearing bracket is a two-section structure, consisting of a coaxially arranged reference ring and a limit ring;

[0007] The reference sleeve is fixedly matched with the outer cylindrical surface of the stator core, and the support bearing is installed in the limiting sleeve, and the limiting sleeve is fixedly matched with the outer circle of the support bearing.

[0008] As a further solution of the utility model: a pre-tightening spring is arranged in the limiting collar, one end of the pre-tightening spring abuts against the support bearing, so as to achieve a pre-tightening effect on the support bearing.

[0009] As a further solution of the utility model: a preload sleeve is also installed on the limiting ring, and the lower end of the preload sleeve forms a clamping part, which is clamped and installed on the bearing bracket. One end of the preload spring is against the preload sleeve, and the other end cooperates with the support bearing.

[0010] As a further solution of the utility model: the pre-tightening sleeve is made of insulating material.

[0011] As a further solution of the utility model: the outer rings of the output bearing and the support bearing are both provided with a rubber layer with a certain hardness and damping coefficient.

[0012] The beneficial effects of the utility model are as follows: by cooperating with the outer shell and the bearing bracket, the outer cylindrical surface of the stator core itself is used as a positioning reference to achieve calibration of the output bearing and the support bearing; the concentricity of the front and rear bearings is improved, and the technical problems of increased motor vibration and noise caused by poor concentricity of the front and rear bearings, and easy bearing damage caused by long-term operation of the motor are solved.

[0013] In addition, by arranging a preload spring in the bearing bracket, the supporting bearing can be preloaded, thereby improving the structural stability of the supporting bearing and increasing its service life.

[0014] The output bearing and support bearing are fixed to their respective bearing chambers by rubber with a certain hardness and damping coefficient, which effectively reduces the impact of vibration and noise generated by the high-speed rotation of the rotor on the motor and improves the working stability and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the bearing bracket in the utility model.

[0017] Figure 3 It is a structural schematic diagram of a bearing bracket and a pre-tightening sleeve in the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. It should be understood that the present application is not limited to the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The utility model provides Figures 1 to 3 In the embodiment of the utility model, a high-power, low-noise, high-speed motor comprises: an outer shell 1, a stator core 2, a rotor shaft 5 and a bearing bracket 3;

[0022] The outer shell 1 is nested and installed on the outer cylindrical surface of the stator core 2, and the rotor shaft 5 is arranged in the stator core 2. The two ends of the rotor shaft 5 extend outward respectively. In order to improve the stability of the two ends of the rotor shaft 5, an output bearing 8 is installed on the output end (front end) of the rotor shaft 5, and a support bearing 7 is installed on the tail end of the rotor shaft 5.

[0023] The output bearing 8 is installed in the outer shell 1, and the fixing work is realized through the outer shell 1;

[0024] The support bearing 7 is installed in the bearing bracket 3, and the fixing work is realized by the bearing bracket 3. The bearing bracket 3 is a two-stage structure, which is composed of a coaxially arranged reference ring 32 and a limit ring 31;

[0025] Among them, the reference ring 32 is nested on the stator core 2 and fixed with the outer cylindrical surface of the stator core 2, and the support bearing 7 is installed in the limiting ring 31, and the limiting ring 31 is fixed with the outer circle of the support bearing 7; thereby, through the cooperation of the outer shell 1 and the bearing bracket 3, the outer cylindrical surface of the stator core 2 itself is used as the positioning reference to realize the calibration of the output bearing 8 and the support bearing 7.

[0026] Furthermore, in order to improve the working stability of the rotor shaft 5 , a group of pre-tightening springs 6 are further provided in the limiting collar 31 , and one end of the pre-tightening spring 6 abuts against the supporting bearing 7 to achieve a pre-tightening effect on the supporting bearing 7 .

[0027] In order to provide sufficient supporting force for the preload spring 6 to ensure the stability of the preload structure, a preload shell 4 is also installed on the limiting ring 31. The preload shell 4 is made of insulating material. The lower end of the preload shell 4 forms a clamping portion 41, which is clamped and installed on the bearing bracket 3. One end of the preload spring 6 is against the preload shell 4, and the other end cooperates with the support bearing 7.

[0028] Furthermore, the outer rings of the output bearing 8 and the support bearing 7 are both provided with a rubber layer having a certain hardness and damping coefficient. The output bearing 8 and the support bearing 7 are fixedly installed in their respective bearing chambers through the rubber layer (not shown in the figure), which can prevent the vibration generated in the rotor shaft 5 from being directly transmitted to the housing structure of the motor, thereby effectively reducing the impact of the vibration and noise generated by the high-speed rotation of the rotor on the motor.

[0029] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "including a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-power, low-noise, high-speed motor, characterized in that: include: Outer casing, stator core, rotor shaft and bearing bracket; The outer shell is nested and installed on the outer cylindrical surface of the stator core, and the middle section of the rotor shaft is arranged in the stator core. In order to improve the stability of both ends of the rotor shaft, an output bearing is installed on the output end of the rotor shaft, and the output bearing is installed in the outer shell; A support bearing is installed at the tail end of the rotor shaft; the bearing bracket is arranged at the tail end of the rotor shaft, and the bearing bracket is a two-section structure, consisting of a coaxially arranged reference ring and a limit ring; The reference sleeve is fixedly matched with the outer cylindrical surface of the stator core, and the support bearing is installed in the limiting sleeve, and the limiting sleeve is fixedly matched with the outer circle of the support bearing.

2. A high-power, low-noise, high-speed motor according to claim 1, characterized in that: A preload spring is arranged in the limiting collar, and one end of the preload spring abuts against the support bearing to achieve a preload effect on the support bearing.

3. A high-power, low-noise, high-speed motor according to claim 1, characterized in that: A preload sleeve is also installed on the limiting collar, and the lower end of the preload sleeve forms a clamping portion, which is mounted on the bearing bracket. One end of the preload spring is against the preload sleeve, and the other end cooperates with the support bearing.

4. A high-power, low-noise, high-speed motor according to claim 1, characterized in that: The preloaded sleeve is made of insulating material.

5. A high-power, low-noise, high-speed motor according to claim 1, characterized in that: The outer rings of the output bearing and the support bearing are both provided with a rubber layer with a certain hardness and damping coefficient.

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