High-speed motor
By positioning the damper relative to the end cap along the circumference of the bearing in a high-speed motor, the influence of the vibration of the rotor on the bearing positioning stability is solved, and the static seal between the damper and the end cap is realized to adapt to high-speed operating conditions. , slow down vibration.
Patent Information
- Application Number
- CN202420781445.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The high-speed motor rotor produces a vibrating impact on the bearing when it is running at high speed, resulting in a decrease in the bearing radial positioning stability, and the deflection of the damper relative to the end cap leads to seal failure and damper wear.
A high-speed motor is designed to adjust the bearing radially support damping by installing a damper between the end cover and the bearing and positioning the damper in the circumference of the bearing relative to the end cover, thereby avoiding the damper deflection and achieving a static seal.
The bearing radial support damping is effectively adjusted, adapted to high-speed operating conditions, slowed down the radial vibration of the rotor, and realized the static seal between the damper and the end cap, avoiding seal failure and damper wear.
Smart Images
Figure CN222464311U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a high-speed motor. Background Art
[0002] When the motor runs at high speed, the rotor will produce a certain vibration impact on the supporting bearings at both ends due to factors such as dynamic balance and natural frequency, which will increase the requirements for bearing processing accuracy and radial positioning stability. The use of hydraulic methods to increase the radial support force of the bearings, thereby improving the radial stability of the bearings, can meet the mechanical requirements of high-speed rotation of the rotor, but the device that applies radial pressure to the bearings is prone to deflection with the bearings, which will lead to technical problems such as damper wear and seal failure. Utility Model Content
[0003] The utility model aims to provide a high-speed motor, which can adjust the radial support damping of the bearing and can also alleviate the technical problem of sealing failure caused by the deflection of the damper relative to the end cover.
[0004] In a first aspect, the utility model provides a high-speed motor, comprising: a housing, a stator, a rotor, an end cover, a damper and a bearing;
[0005] The stator is installed inside the housing, and the stator is sleeved with the rotor;
[0006] The end cover is connected to the housing, and the rotor is rotatably connected to the end cover via the bearing;
[0007] The damper is installed between the end cover and the bearing, and the damper is positioned relative to the end cover along the circumferential direction of the bearing.
[0008] In combination with the first aspect, the utility model provides a first possible implementation manner of the first aspect, wherein the damper is provided with a pin hole, a positioning pin is inserted into the pin hole, and the positioning pin is connected to the end cover.
[0009] In combination with the first aspect, the utility model provides a second possible implementation of the first aspect, wherein the damper comprises: a sleeve body and an inner lining ring, the inner lining ring is connected to one end of the sleeve body, and the inner lining ring abuts against the axial end surface of the bearing;
[0010] The sleeve body is inserted into the end cover, and the sleeve body is sleeved on the outer ring of the bearing.
[0011] In combination with the second possible implementation of the first aspect, the utility model provides a third possible implementation of the first aspect, wherein an annular cavity is formed between the sleeve body and the end cover, and the annular cavity surrounds the sleeve body.
[0012] In combination with the third possible implementation of the first aspect, the utility model provides a fourth possible implementation of the first aspect, wherein a first sealing ring and a second sealing ring are installed between the sleeve body and the end cover, the first sealing ring and the second sealing ring are arranged at intervals along the axial direction of the sleeve body, and the annular cavity is located between the first sealing ring and the second sealing ring.
[0013] In combination with the third possible implementation of the first aspect, the utility model provides a fifth possible implementation of the first aspect, wherein an annular groove is provided on the outer surface of the sleeve body, and the annular groove is coaxial with the sleeve body.
[0014] In combination with the third possible implementation of the first aspect, the utility model provides a sixth possible implementation of the first aspect, wherein the end cover is provided with an oil supply channel and an oil return channel, and the oil supply channel and the oil return channel are respectively connected to the annular cavity fluid.
[0015] In combination with the first aspect, the utility model provides a seventh possible implementation manner of the first aspect, wherein the end cover comprises: a first cover body and a second cover body, wherein the first cover body and the second cover body are respectively connected to the housing and enable the stator to be enclosed in the housing;
[0016] The first cover body and the second cover body are respectively matched with the rotor through the bearings, and the first cover body and the second cover body are respectively installed with the damper.
[0017] In combination with the seventh possible implementation manner of the first aspect, the utility model provides an eighth possible implementation manner of the first aspect, wherein a first sealing cover is installed on a side of the first cover body away from the second cover body, and a second sealing cover is installed on a side of the second cover body away from the first cover body;
[0018] The first cover abuts against one of the dampers, and the second cover abuts against the other damper.
[0019] In combination with the first aspect, the utility model provides a ninth possible implementation manner of the first aspect, wherein the damper is configured as a non-metallic structure surrounding the bearing.
[0020] The embodiments of the utility model bring the following beneficial effects: the stator is installed on the inner side of the casing, and the stator is sleeved with a rotor, the end cover is connected to the casing, the rotor is rotatably connected to the end cover through a bearing, the damper is installed between the casing and the bearing, and the damper is positioned relative to the end cover along the circumferential direction of the bearing. On the one hand, the radial support damping of the bearing can be adjusted by the damper to adapt to the high speed working conditions of the rotor, and on the other hand, static sealing between the damper and the end cover can be achieved.
[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0023] Figure 1 A cross-sectional view of a high-speed motor provided by an embodiment of the utility model;
[0024] Figure 2 A cross-sectional view of a damper for a high-speed motor provided by an embodiment of the utility model;
[0025] Figure 3 A schematic diagram of a damper for a high-speed motor provided by an embodiment of the utility model;
[0026] Figure 4 for Figure 1 A magnified schematic diagram of position A in the middle.
[0027] Icons: 100 - housing; 200 - stator; 300 - rotor; 400 - end cover; 401 - oil supply channel; 402 - oil return channel; 410 - first cover body; 420 - second cover body; 430 - first sealing cover; 440 - second sealing cover; 500 - damper; 501 - pin hole; 502 - annular groove; 510 - sleeve body; 520 - liner ring; 530 - positioning pin; 600 - bearing; 700 - annular cavity; 800 - first sealing ring; 900 - second sealing ring. DETAILED DESCRIPTION
[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, the terms "first", "second", and "third" are only used to describe the difference in names, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0031] like Figure 1 As shown, the high-speed motor provided by the embodiment of the utility model includes: a housing 100, a stator 200, a rotor 300, an end cover 400, a damper 500 and a bearing 600; the stator 200 is installed on the inner side of the housing 100, and the stator 200 is sleeved with the rotor 300; the end cover 400 is connected to the housing 100, and the rotor 300 is rotatably connected to the end cover 400 through the bearing 600; the damper 500 is installed between the end cover 400 and the bearing 600, and the damper 500 is positioned relative to the end cover 400 along the circumferential direction of the bearing 600.
[0032] In this embodiment, the damper 500 is interference fit with the outer ring of the bearing 600, and the radial extrusion force borne by the outer ring of the bearing 600 can be adjusted through the damper 500, thereby adjusting the radial support damping of the bearing 600, thereby adapting to the high-speed working condition of the rotor 300 and reducing the radial vibration of the rotor 300 under the high-speed working condition. In addition, the damper 500 is positioned relative to the end cover 400 along the circumferential direction of the bearing 600, which can avoid the deflection of the damper 500, and can achieve static sealing between the damper 500 and the end cover 400, thereby avoiding or reducing oil leakage.
[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in the embodiment of the utility model, the damper 500 is provided with a pin hole 501, a positioning pin 530 is inserted in the pin hole 501, and the positioning pin 530 is connected to the end cover 400. The damper 500 may be provided with a plurality of pin holes 501 extending parallel to the axis of the rotor 300, each pin hole 501 is inserted with a positioning pin 530, and the positioning pin 530 is connected to the end cover 400, so as to realize the circumferential positioning of the damper 500 relative to the end cover 400.
[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the damper 500 includes: a sleeve body 510 and an inner liner ring 520, the inner liner ring 520 is connected to one end of the sleeve body 510, and the inner liner ring 520 abuts against the axial end face of the bearing 600; the sleeve body 510 is inserted into the end cover 400, and the sleeve body 510 is sleeved on the outer ring of the bearing 600. The sleeve body 510 contracts radially to achieve radial support for the bearing 600, and the inner liner ring 520 abuts against the axial end face of the outer side of the bearing 600, thereby achieving axial positioning of the damper 500 relative to the bearing 600.
[0035] The damper 500 may not only be made of steel, but also may be made of composite materials such as ceramics or have insulating materials sprayed on the surface of the damper 500, thereby alleviating the problem of current corrosion.
[0036] like Figure 1 , Figure 2 and Figure 4 As shown, an annular cavity 700 is formed between the sleeve body 510 and the end cover 400, and the annular cavity 700 surrounds the sleeve body 510. The annular cavity 700 can be sealed with oil with a certain pressure, or external high-pressure oil can be introduced into the annular cavity 700, and the oil in the annular cavity 700 can apply uniform radial pressure to the sleeve body 510 along the circumferential direction. In addition, the heat of the bearing 600 can be transferred to the oil in the annular cavity 700 through the damper 500, thereby achieving heat dissipation of the bearing 600.
[0037] Furthermore, a first sealing ring 800 and a second sealing ring 900 are installed between the sleeve body 510 and the end cover 400. The first sealing ring 800 and the second sealing ring 900 are arranged at an axial interval along the sleeve body 510, and the annular cavity 700 is located between the first sealing ring 800 and the second sealing ring 900, which can prevent the oil in the annular cavity 700 from leaking.
[0038] like Figure 2 , Figure 3 and Figure 4As shown, the outer surface of the sleeve body 510 is provided with an annular groove 502, which is coaxial with the sleeve body 510. The oil in the annular cavity 700 can be filled into the annular groove 502, thereby improving the uniformity of the oil pressure on the sleeve body 510 in the circumferential direction.
[0039] like Figure 1 As shown, the end cover 400 is provided with an oil supply channel 401 and an oil return channel 402, and the oil supply channel 401 and the oil return channel 402 are respectively connected to the annular cavity 700 fluid, and the external high-pressure oil can enter the annular cavity 700 through the oil supply channel 401, and then flow out through the oil return channel 402, which can realize oil pressure regulation and oil circulation on the one hand, and on the other hand, the circulating oil can absorb the heat of the end cover 400 and the damper 500, thereby realizing cooling. Among them, the oil return channel 402 can be configured as a throttle hole, and a standard throttle can be installed to throttle the oil as needed, so as to form a high-pressure oil film at the annular cavity 700.
[0040] Furthermore, the end cover 400 includes: a first cover body 410 and a second cover body 420, the first cover body 410 and the second cover body 420 are respectively connected to the housing 100, and the stator 200 is enclosed in the housing 100; the first cover body 410 and the second cover body 420 are respectively matched with the rotor 300 through bearings 600, and the first cover body 410 and the second cover body 420 are respectively installed with dampers 500. The radial supporting force of the bearings 600 at both ends of the rotor 300 is adjusted one by one by the two dampers 500, which can alleviate the technical problem of radial vibration of the rotor 300 caused by high-speed rotation.
[0041] Furthermore, a first cover 430 is installed on the side of the first cover 410 away from the second cover 420, and a second cover 440 is installed on the side of the second cover 420 away from the first cover 410; the first cover 430 abuts against one damper 500, and the second cover 440 abuts against the other damper 500. The inner rings of the first cover 430 and the second cover 440 are respectively sealed with the rotating shaft of the rotor 300, the first cover 430 blocks the outer side of one damper 500, and the second cover 440 blocks the outer side of the other damper 500, so as to realize the sealing protection of the damper 500 and the bearing 600.
[0042] like Figure 1 , Figure 2 and Figure 3 As shown, the damper 500 is configured as a non-metallic structure surrounding the bearing 600, the sleeve body 510 and the inner liner ring 520 can be configured as an integrally formed ceramic device or plastic device, and the damper 500 can be assembled on the end cover 400 by a clearance fit. The use of non-metallic materials can avoid the conduction of static electricity and eddy currents.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A high-speed motor, characterized in that: include: A housing (100), a stator (200), a rotor (300), an end cover (400), a damper (500) and a bearing (600); The stator (200) is installed inside the housing (100), and the stator (200) is sleeved with the rotor (300); The end cover (400) is connected to the housing (100), and the rotor (300) is rotatably connected to the end cover (400) via the bearing (600); The damper (500) is installed between the end cover (400) and the bearing (600), and the damper (500) is positioned relative to the end cover (400) along the circumferential direction of the bearing (600).
2. The high-speed motor according to claim 1, characterized in that: The damper (500) is provided with a pin hole (501), a positioning pin (530) is inserted into the pin hole (501), and the positioning pin (530) is connected to the end cover (400).
3. The high-speed motor according to claim 1, characterized in that: The damper (500) comprises: a sleeve body (510) and an inner lining ring (520), wherein the inner lining ring (520) is connected to one end of the sleeve body (510), and the inner lining ring (520) abuts against the axial end surface of the bearing (600); The sleeve portion (510) is inserted into the end cover (400), and the sleeve portion (510) is sleeved on the outer ring of the bearing (600).
4. The high-speed motor according to claim 3, characterized in that: An annular cavity (700) is formed between the sleeve body (510) and the end cover (400), and the annular cavity (700) surrounds the sleeve body (510).
5. The high-speed motor according to claim 4, characterized in that: A first sealing ring (800) and a second sealing ring (900) are installed between the sleeve body (510) and the end cover (400); the first sealing ring (800) and the second sealing ring (900) are spaced apart along the axial direction of the sleeve body (510), and the annular cavity (700) is located between the first sealing ring (800) and the second sealing ring (900).
6. The high-speed motor according to claim 4 or 5, characterized in that: An annular groove (502) is provided on the outer surface of the sleeve body (510), and the annular groove (502) is coaxial with the sleeve body (510).
7. The high-speed motor according to claim 4 or 5, characterized in that: The end cover (400) is provided with an oil supply channel (401) and an oil return channel (402), and the oil supply channel (401) and the oil return channel (402) are respectively in fluid communication with the annular cavity (700).
8. The high-speed motor according to claim 1, characterized in that: The end cover (400) comprises: a first cover body (410) and a second cover body (420), wherein the first cover body (410) and the second cover body (420) are respectively connected to the housing (100) and enable the stator (200) to be enclosed in the housing (100); The first cover body (410) and the second cover body (420) are respectively matched with the rotor (300) through the bearing (600), and the first cover body (410) and the second cover body (420) are respectively installed with the damper (500).
9. The high-speed motor according to claim 8, characterized in that: A first sealing cover (430) is installed on a side of the first cover body (410) facing away from the second cover body (420), and a second sealing cover (440) is installed on a side of the second cover body (420) facing away from the first cover body (410); The first cover (430) abuts against one of the dampers (500), and the second cover (440) abuts against the other damper (500).
10. The high-speed motor according to claim 1, characterized in that: The damper (500) is configured as a non-metallic structure surrounding the bearing (600).