Generator

Abstract

The utility model discloses a generator which comprises a stator assembly and a rotor assembly arranged in the stator assembly. The stator assembly comprises a stator and an end cover, and the stator and the end cover are provided with a first bearing chamber and a second bearing chamber which are used for being connected with the rotor assembly respectively; the rotor assembly comprises a rotating shaft, a rotor iron core arranged on the rotating shaft, magnetic steel arranged on the circumferential surface of the rotor iron core, and a protective sleeve arranged on the circumferential surface of the magnetic steel; the two ends of the rotating shaft are each provided with a double-row bearing used for being installed in the first bearing chamber and the second bearing chamber. According to the magnetic steel, the sheath is used for generating pre-compressive stress, and when the sheath is matched with the iron core, the pre-compressive stress can counteract most tensile stress, so that the characteristic of compressive stress of the magnetic steel is ensured. The rotor core is formed by laminating soft magnetic materials, so that the iron loss of the generator can be reduced, and the efficiency of the generator is further improved. And the generator adopts a single end cover structure, so that the matching size chains are reduced, the coaxiality can be better improved, and the realization of ultra-high speed is further facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of generator, specifically relates to a generator. BACKGROUND

[0002] Generators refer to the mechanical equipment that converts mechanical energy into electric energy, which is driven by water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy to be transmitted to the generator, and then converts the mechanical energy into electric energy by the generator.

[0003] At present, the rotating speed of the generator in the market is generally between 1500-3000 revolutions, and it is difficult to exceed 10,000 revolutions, and the generator with rotating speed exceeding 10,000 revolutions is generally applied to the electric drive motor, however, the power of these electric drive motors is generally not high, basically below 500W, and is mostly applied to small household appliances such as dust collector and hair dryer.

[0004] Based on the comprehensive influence of the rotating speed and power of the generator, the volume and weight of the generator will be larger, and the difficulty of carrying or transporting the equipment with the generator will be increased. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a generator, which aims at solving the problem that the volume and weight of the generator are larger due to the comprehensive influence of the rotating speed and power, and the difficulty of carrying or transporting the equipment with the generator is increased.

[0006] To achieve the above-mentioned purpose, the utility model realizes the technical scheme as follows: a generator, which comprises a stator assembly, a rotor assembly arranged in the stator assembly;

[0007] The stator assembly comprises a stator and an end cover arranged at one end of the stator, and the stator and the end cover are respectively provided with a first bearing chamber and a second bearing chamber for connecting the rotor assembly;

[0008] The rotor assembly comprises a rotating shaft, a rotor core arranged on the rotating shaft, a magnetic steel arranged on the circumferential surface of the rotor core, and a protective sleeve arranged on the circumferential surface of the magnetic steel;

[0009] The rotating shaft is provided with double-row bearings at both ends, which are used for mounting to the first bearing chamber and the second bearing chamber.

[0010] In summary, the generator according to the utility model discloses, since the shaft, the rotor core, the magnetic steel and the protective sleeve all adopt interference fit design, the interference amount is determined through calculation and simulation, the connecting strength can be guaranteed, and the material bearing capacity can be guaranteed. The magnetic steel generates pre-compressive stress by the protective sleeve, and when cooperating with the core, the pre-compressive stress can offset most tensile stress, so that the compressive stress characteristics of the magnetic steel are guaranteed. The rotor core is made of soft magnetic material and is laminated, which can reduce the iron loss of the generator, and the efficiency of the generator is further improved. The generator adopts a single end cover structure, so that the matching size chain is reduced, the coaxiality is better improved, and the realization of super high speed is further facilitated. In addition, the shaft sleeve is made of steel, so that the bearing temperature does not cause large deformation of the bearing chamber. At the same time, the bearing of the generator selects double-row bearings, which can meet the requirements of super high speed and high power, realizes high power, and realizes the structure with small assembly volume through interference fit.

[0011] According to an aspect of the above technical solution, the end of the stator away from the end cover is provided with a plurality of first connecting ribs, and the two ends of the first connecting ribs are connected to the first bearing chamber and the inner circumference of the stator respectively.

[0012] According to an aspect of the above technical solution, the end of the stator close to the end cover extends outward a plurality of mounting angles for being movably connected with the end cover through fasteners.

[0013] According to an aspect of the above technical solution, the outer part of the stator is uniformly arranged with a plurality of heat dissipation ribs along the circumferential surface in the axial direction.

[0014] According to an aspect of the above technical solution, the two sides of the stator are provided with mounting bases.

[0015] According to an aspect of the above technical solution, the inner circumference of the end cover is connected with the second bearing chamber through a plurality of second connecting ribs.

[0016] According to an aspect of the above technical solution, the two ends of the rotor core are provided with balance end plates.

[0017] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the utility model will become apparent and easy to understand from the description of the embodiments combined with the following drawings, in which:

[0019] Figure 1 It is a structural schematic view of the generator in an embodiment of the utility model;

[0020] Figure 2The utility model discloses an embodiment of generator structure explosion schematic view.

[0021] Figure 3 The utility model discloses an embodiment of rotor assembly's sectional view.

[0022] Figure 4 The utility model discloses an embodiment of generator's certain view angle's sectional view.

[0023] Explanation of the drawing component symbol:

[0024] Stator assembly 100, stator 110, first bearing chamber 111, first connecting rib 112, mounting angle 113, heat dissipation rib 114, mounting base 115, end cover 120, second bearing chamber 121, second connecting rib 122, rotor assembly 200, rotating shaft 210, rotor iron core 220, magnetic steel 230, protective sleeve 240, balance end plate 250, fastener 300, double row bearing 400. Specific implementation

[0025] In order to make the purpose, the feature and the advantage of the utility model more obvious and easy to understand, the specific implementation of the utility model is explained in detail below with the drawings. The drawings show several embodiments of the utility model. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0026] It is to be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", "upper", "lower", and similar expressions as used herein are only intended for the purpose of illustration and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

[0027] In the utility model, unless there is definite stipulation and limitation, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] Please refer to Figures 1-4 , it is a kind of generator structure schematic diagram provided in the embodiment of the utility model, the generator includes stator assembly 100, the rotor assembly arranged in the stator assembly 100, wherein:

[0029] In order to support the rotor assembly 200, the stator assembly 100 proposed in the application includes a stator 110, an end cover 120 arranged at one end of the stator 110, the stator 110 and the end cover 120 are respectively provided with a first bearing chamber 111 and a second bearing chamber 121 connected with the rotor assembly 200, in order to arrange the first bearing chamber 111 at the end surface of the stator 110, a plurality of first connecting ribs 112 are respectively connected to the first bearing chamber 111 and the inner circumference of the stator 110, so that the first bearing chamber 111 is arranged at the axial center of the stator 110. Similarly, the second connecting rib 122 is also arranged on the end cover 120 to arrange the second bearing chamber 121 at the axial center of the end cover 120. Since the end cover 120 and the stator 110 are adapted, the first bearing chamber 111 and the second bearing chamber 121 are coincident with the axial direction projection, so as to ensure that the first bearing chamber 111 and the second bearing chamber 121 horizontally support the rotor assembly 200 in the stator 110.

[0030] Further, since the adjacent first connecting ribs 112 and the adjacent second connecting ribs 122 are in a hollow state, and the ventilation duct is formed relative to the two ends of the stator 110, the end surfaces of the two ends of the stator 110 can provide efficient heat dissipation performance during the operation of the generator. In order to further improve the heat dissipation performance of the generator, a plurality of heat dissipation ribs 114 are uniformly arranged on the outer part of the stator 110 along the circumferential surface in the axial direction, which can quickly dissipate the heat of the machine base.

[0031] At the same time, the generator adopts a single end cover 120 structure, which reduces the matching size chain and can better improve the coaxiality. Further, it is beneficial to the realization of ultra-high speed. In addition, the shaft sleeve is made of steel, so that the bearing temperature does not cause large deformation of the bearing chamber.

[0032] The double-row bearing 400 in the embodiment adopts a double-row angular contact ceramic ball bearing. The angular contact ceramic ball bearing is suitable for high-speed generators, but single-row angular contact ball bearings cannot meet the load requirements of high-power generators. Therefore, the generator adopts a double-row angular contact ceramic ball bearing, which can meet the requirements of ultra-high speed and high power.

[0033] In addition, the stator 110 is provided with a plurality of mounting angles 113 at one end close to the end cover 120, and the end cover 120 is also provided with the mounting angles 113 at the corresponding positions, so as to connect the stator 110 and the end cover 120 through the fasteners 300.

[0034] In order to improve the bearing capacity of the rotor assembly 200 in the embodiment, the rotor assembly 200 comprises a rotating shaft 210, a rotor core 220 arranged on the rotating shaft 210, a magnetic steel 230 arranged on the circumferential surface of the rotor core 220, and a protective sleeve 240 arranged on the circumferential surface of the magnetic steel 230, and balance end plates 250 are arranged at both ends of the rotor core 220.

[0035] The balance end plates 250 at both ends are arranged in a clearance fit mode, facilitating dynamic balance, and the dynamic balance position can be removed without a 360-degree edge, so as to maximize the dynamic balance precision, reduce the vibration and noise of the generator, thereby reducing the mechanical loss and greatly improving the working efficiency of the generator.

[0036] The rotor core 220 is made of soft magnetic material and is laminated, so as to reduce the iron loss of the generator and further improve the efficiency of the generator.

[0037] In conclusion, according to the generator provided by the utility model, since the rotating shaft, the rotor core, the magnetic steel and the protective sleeve are all designed in an interference fit mode, the interference amount is determined through calculation and simulation, so as to ensure the connection strength and the bearing capacity of the materials. The magnetic steel generates a pre-compression stress through the protective sleeve, and when the magnetic steel is matched with the rotor core, the pre-compression stress can offset most of the tensile stress, so as to ensure the compression stress characteristics of the magnetic steel. The rotor core is made of soft magnetic material and is laminated, so as to reduce the iron loss of the generator and further improve the efficiency of the generator. The generator adopts a single-end cover structure, the matching size chain is reduced, the coaxiality is better, the super-high speed is further facilitated, the shaft sleeve is made of steel, so that the bearing temperature does not cause large deformation of the bearing chamber, the bearing of the generator is selected as a double-row bearing, so as to meet the requirements of super-high speed and high power, and the structure with small assembly size is realized through the interference fit.

[0038] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A generator characterized by, The generator comprises a stator assembly, a rotor assembly arranged in the stator assembly; The stator assembly comprises a stator and an end cover arranged at one end of the stator, and the stator and the end cover are respectively provided with a first bearing chamber and a second bearing chamber for connecting the rotor assembly; The rotor assembly comprises a rotating shaft, a rotor core arranged on the rotating shaft, a magnetic steel arranged on the circumferential surface of the rotor core, and a protective sleeve arranged on the circumferential surface of the magnetic steel; Both ends of the rotating shaft are provided with double-row bearings for mounting to the first bearing chamber and the second bearing chamber.

2. The electric generator of claim 1, wherein, The end of the stator away from the end cover is provided with a plurality of first connecting ribs, and both ends of the first connecting ribs are respectively connected to the first bearing chamber and the inner circumference of the stator.

3. The electric generator of claim 2, wherein, The end of the stator close to the end cover extends outwardly a plurality of mounting corners for being movably connected to the end cover through fasteners.

4. The electric generator of claim 3, wherein, A plurality of heat dissipation ribs are uniformly arranged on the circumferential surface of the stator along the outer part of the stator.

5. The electric generator of claim 4, wherein, Both sides of the stator are provided with mounting bases.

6. The electric generator of claim 1, wherein, The inner circumference of the end cover and the second bearing chamber are connected through a plurality of second connecting ribs.

7. The electric generator of claim 1, wherein, Both ends of the rotor core are provided with balance end plates.

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