Water-cooled high-speed permanent magnet motor
By using a combination of interference fit bearings and preloaded springs in a water-cooled high-speed permanent magnet motor, the problem of bearing displacement during high-speed rotor rotation is solved, achieving motor stability and tight fit, and reducing vibration.
Patent Information
- Application Number
- CN202422939818.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In water-cooled high-speed permanent magnet motors, the relative movement of the bearings when the rotor rotates at high speed affects the stability of the motor, requiring the design of a structure to achieve a tight fit and installation.
The rotor is subjected to interference fit with the first and second mating bearings, and the bearings are axially limited by the preload spring. The bearings are further limited by the abutment parts and abutment blocks to ensure the stability of the rotor when rotating at high speed.
This effectively prevents bearing displacement during high-speed rotation, improves the tightness of the motor, reduces vibration, and enhances the overall stability of the motor.
Smart Images
Figure CN223502666U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of permanent magnet synchronous motors for high-speed fans, and more particularly to a water-cooled high-speed permanent magnet motor. Background Technology
[0002] With the rapid development of modern industry and technology, electric motors are increasingly widely used in various mechanical equipment. Among them, water-cooled high-speed permanent magnet motors, with their high efficiency, high stability, and long lifespan, have become the preferred type of electric motor in many fields.
[0003] Water-cooled high-speed permanent magnet motors are motors that use a water-cooling system to improve heat dissipation efficiency, making them suitable for high-temperature or high-load environments. Their characteristics include high power density, stability and reliability, environmental friendliness and energy efficiency, and strong adaptability.
[0004] In water-cooled high-speed permanent magnet motors, when the rotor rotates at high speed, the bearings on the rotor will move relative to each other, which will affect the stability of the motor. Therefore, it is necessary to design a structure that can fit and install the motor tightly. Utility Model Content
[0005] To address the problems existing in the prior art, this utility model provides a water-cooled high-speed permanent magnet motor, comprising:
[0006] A rotor, which is mounted on a chassis and rotates on the chassis;
[0007] The first and second mating bearings are both sleeved on the outside of the rotor. The first mating bearing is located on one side of the machine housing, and the second mating bearing is located on the other side of the machine housing. Both the first and second mating bearings are interference-fitted with the rotor.
[0008] Multiple preload springs are provided, and each of the multiple preload springs is connected to the first mating bearing and / or the second mating bearing. The preload springs provide a preload force to the first mating bearing and / or the second mating bearing in a direction parallel to the rotor, so that the first mating bearing and / or the second mating bearing engage with the rotor.
[0009] Optionally, in some embodiments of this application, the chassis includes a front cover, a rear cover, and a base. The front cover and the rear cover are respectively disposed at both ends of the base. The front cover, the rear cover, and the base enclose to form the chassis, and an inner cavity is formed inside the chassis.
[0010] Both the front end cover and the rear end cover are connected to the base via connectors. The front end cover and the rear end cover have through holes corresponding to the rotor positions. The rotor is located in the through holes and is supported by the through holes, allowing the rotor to rotate on the chassis.
[0011] Optionally, in some embodiments of this application, the first mating bearing is disposed in the through hole on the front end cover, the outer side of the first mating bearing abuts against the through hole by the preload spring, and the inner side of the first mating bearing is sleeved on the outer side of the rotor;
[0012] The second mating bearing is disposed in the through hole on the rear end cover, the outer side of the second mating bearing abuts against the through hole through the preload spring, and the inner side of the second mating bearing is sleeved on the outer side of the rotor.
[0013] Optionally, in some embodiments of this application, the preload spring is disposed in a through hole on the rear end cover, and the preload spring is in the through hole and abuts against the second mating bearing;
[0014] A spring washer is also provided in the through hole, and the spring washer abuts against the preload spring;
[0015] A rear cover is provided outside the spring washer, and the rear cover abuts against the spring washer, so that the spring washer limits the preload spring. The rear cover is fixedly connected to the rear end cover.
[0016] Optionally, in some embodiments of this application, the front end cover is provided with a front outer cover, the front outer cover is fixedly connected to the front end cover, and the front outer cover is provided with an abutting member at a position corresponding to the first mating bearing, the abutting member abutting against the first mating bearing.
[0017] Optionally, in some embodiments of this application, a round nut is also fitted over the rotor. The round nut is located between the front outer cover and the first mating bearing. An abutment block is provided on the round nut facing the first mating bearing, and the abutment block abuts against the first mating bearing.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] In this embodiment, by providing a first mating bearing, a second mating bearing, and a preload spring, the preload spring can axially limit the second mating bearing during the high-speed rotation of the rotor, preventing displacement of the second mating bearing and thus avoiding the motor from not fitting tightly together and causing vibration. At the same time, an abutment and abutment block are provided on one side of the first mating bearing to limit the first mating bearing, improving the overall tightness of the motor. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the internal structure of the water-cooled high-speed permanent magnet motor provided in the embodiments of this application;
[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;
[0023] Figure 3 for Figure 1 Enlarged structural diagram at point B.
[0024] Explanation of reference numerals in the attached figures:
[0025] 100, Rotor; 200, First mating bearing; 300, Second mating bearing; 400, Chassis; 410, Front end cover; 420, Rear end cover; 430, Base; 440, Inner cavity; 450, Connecting piece; 460, Through hole; 461, Spring washer; 470, Rear outer cover; 480, Front outer cover; 481, Abutting piece; 500, Preload spring; 600, Round nut; 610, Abutting block. Detailed Implementation
[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.
[0027] Specifically, such as Figure 1As shown in the embodiment of this application, a water-cooled high-speed permanent magnet motor is provided. The motor is mainly composed of a housing 400 and a rotor 100. The housing 400 has an inner cavity 440. The housing 400 is composed of a front cover 410, a rear cover 420 and a base 430. The front cover 410 is located on one side of the base 430 and the rear cover 420 is located on the other side of the base 430. The various components are connected by connectors 450, so that the front cover 410, the rear cover 420 and the base 430 enclose a housing 400.
[0028] The aforementioned connector 450 is a fixing screw or threaded rod. This fixing screw can connect the front cover 410 and the base 430, and the rear cover 420 and the base 430, so that the motor can be assembled efficiently.
[0029] A through hole 460 is provided on the front cover 410 at the position corresponding to the rotor 100. The rotor 100 is located in the through hole 460 so that the front cover 410 limits the rotor 100. Correspondingly, a through hole 460 is also provided on the rear cover 420 at the position corresponding to the rotor 100. The rotor 100 is located in the through hole 460 so that the rotor 100 can rotate within the housing 400.
[0030] In this embodiment, the radius of the through hole 460 is larger than the outer diameter of the rotor 100 at the location of the through hole 460, so that the rotor 100 can effectively rotate within the housing 400.
[0031] Furthermore, in the above structure, a first mating bearing 200 and a second mating bearing 300 are installed in the through hole 460. The first mating bearing 200 is installed in the through hole 460 on the front end cover 410. The outer diameter of the first mating bearing 200 is equal to the inner diameter of the through hole 460 at that position, and the inner diameter of the first mating bearing 200 is equal to the outer diameter of the rotor 100 at that position. The inner side of the first mating bearing 200 is sleeved on the outer side of the rotor 100, so that in this structure, the rotor 100 is rotatably connected to the through hole 460 on the front end cover 410 through the first mating bearing 200.
[0032] Accordingly, the second mating bearing 300 is installed in the through hole 460 on the rear end cover 420, wherein the outer diameter of the second mating bearing 300 is equal to the inner diameter of the through hole 460 at that position, the inner diameter of the second mating bearing 300 is equal to the outer diameter of the rotor 100 at that position, and the inner side of the second mating bearing 300 is sleeved on the outer side of the rotor 100.
[0033] In this structure, the rotor 100 is rotatably connected to the through hole 460 on the rear end cover 420 via the second mating bearing 300.
[0034] The rotor 100 can be rotatably connected by the first mating bearing 200 and the second mating bearing 300. During the high-speed rotation of the rotor 100, the first mating bearing 200 and the second mating bearing 300 will have a slight relative axial displacement. In this application, to avoid this situation, both the first mating bearing 200 and the second mating bearing 300 are interference-fitted with the rotor 100. Specifically, the inner rings of the first mating bearing 200 and the second mating bearing 300 are tightly connected to the rotor 100. During the rotation of the rotor 100, the rotation of the rotor 100 drives the inner rings of the first mating bearing 200 and the second mating bearing 300 to rotate, and the outer rings of the first mating bearing 200 and the second mating bearing 300 are evenly connected to the inner rings, so that the inner and outer rings of the first mating bearing 200 and the second mating bearing 300 rotate relative to each other, thereby realizing the rotation process of the rotor 100.
[0035] Preferably, in this embodiment of the application, the first mating bearing 200 and the second mating bearing 300 can also be connected to the rotor 100 by rotating shims to achieve the interference fit effect.
[0036] Based on the above structure, since the first mating bearing 200 and the second mating bearing 300 will have a certain offset in the axial direction of the rotor 100, in order to avoid this situation, as follows: Figure 2 As shown, a preload spring 500 is provided on one side of the second mating bearing 300. The spring force of the preload spring 500 is reversed along the axial direction of the rotor 100 to abut against the second mating bearing 300. The specific abutting process is as follows.
[0037] The second mating bearing 300 abuts against the rotor 100 on one side facing the inner cavity 440, preventing the second mating bearing 300 from sliding towards the inner cavity 440. Instead, it slides slightly away from the inner cavity 440. A spring washer 461 is provided on the side of the second mating bearing 300 away from the inner cavity 440. The spring washer 461 abuts against the preload spring 500, causing the preload spring 500 to abut against the second mating bearing 300. A rear outer cover 470 is provided on the side of the spring washer 461 opposite to the second mating bearing 300. The rear outer cover 470 abuts against the spring washer 461, causing the spring washer 461 to abut against the preload spring 500, preventing the second mating bearing 300 from shifting.
[0038] The rear outer cover 470 and the rear end cover 420 are fixedly connected by a connector 450, so that the rear outer cover 470 is fixed on the rear end cover 420, and a through hole 460 is provided on the rear outer cover 470 corresponding to the position of the rotor 100, through which the rotor 100 is rotatably connected to the rear outer cover 470.
[0039] In this embodiment of the application, the second mating bearing 300 can be limited by the mutual cooperation of the preload spring 500 and the spring washer 461.
[0040] In this embodiment, the preload spring 500 is a wave spring, which is only provided on the second mating bearing 300 in this embodiment.
[0041] Preferably, in this application, the preload spring 500 can also be provided on the first mating bearing 200, that is, the outer side of the first mating bearing 200 abuts against the through hole 460 through the preload spring 500 to form the same structure as the second mating bearing 300.
[0042] In this embodiment, a front outer cover 480 is provided on the outer side of the first mating bearing 200, such as... Figure 3 As shown, the front outer cover 480 and the front end cover 410 are fixedly connected by a connector 450. A contact member 481 is provided on the front outer cover 480 facing the first mating bearing 200, that is, at the position corresponding to the first mating bearing 200. The contact member 481 is used to abut against the first mating bearing 200.
[0043] In this embodiment of the application, a round nut 600 is also provided at the position between the front outer cover 480 and the first mating bearing 200. The round nut 600 is located between the front outer cover 480 and the first mating bearing 200. An abutting block 610 is provided on the round nut 600 facing the first mating bearing 200. The abutting block 610 abuts against the first mating bearing 200.
[0044] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.
Claims
1. A water-cooled high-speed permanent magnet motor, characterized in that, include: A rotor, which is mounted on a chassis and rotates on the chassis; The first and second mating bearings are both sleeved on the outside of the rotor. The first mating bearing is located on one side of the machine housing, and the second mating bearing is located on the other side of the machine housing. Both the first and second mating bearings are interference-fitted with the rotor. Multiple preload springs are provided, and each of the multiple preload springs is connected to the first mating bearing and / or the second mating bearing. The preload springs provide a preload force to the first mating bearing and / or the second mating bearing in a direction parallel to the rotor, so that the first mating bearing and / or the second mating bearing engage with the rotor.
2. The water-cooled high-speed permanent magnet motor according to claim 1, characterized in that, The chassis includes a front cover, a rear cover, and a base. The front cover and the rear cover are respectively located at both ends of the base. The front cover, the rear cover, and the base enclose the chassis to form the chassis, and an inner cavity is formed inside the chassis. Both the front end cover and the rear end cover are connected to the base via connectors. The front end cover and the rear end cover have through holes corresponding to the rotor positions. The rotor is located in the through holes and is supported by the through holes, allowing the rotor to rotate on the chassis.
3. A water-cooled high-speed permanent magnet motor according to claim 2, characterized in that, The first mating bearing is disposed in the through hole on the front end cover, and the outer side of the first mating bearing abuts against the through hole through the preload spring. The inner side of the first mating bearing is sleeved on the outer side of the rotor. The second mating bearing is disposed in the through hole on the rear end cover, the outer side of the second mating bearing abuts against the through hole through the preload spring, and the inner side of the second mating bearing is sleeved on the outer side of the rotor.
4. A water-cooled high-speed permanent magnet motor according to claim 3, characterized in that, The preload spring is disposed in the through hole on the rear end cover, and the preload spring is in the through hole and abuts against the second mating bearing; A spring washer is also provided in the through hole, and the spring washer abuts against the preload spring; A rear cover is provided outside the spring washer, and the rear cover abuts against the spring washer, so that the spring washer limits the preload spring. The rear cover is fixedly connected to the rear end cover.
5. A water-cooled high-speed permanent magnet motor according to claim 2, characterized in that, The front cover is provided with a front outer cover, which is fixedly connected to the front cover. The front outer cover has a protruding abutment corresponding to the position of the first mating bearing, and the abutment abuts against the first mating bearing.
6. A water-cooled high-speed permanent magnet motor according to claim 5, characterized in that, The rotor is also fitted with a round nut, which is located between the front outer cover and the first mating bearing. The round nut has an abutment block facing the first mating bearing, and the abutment block abuts against the first mating bearing.