CN112524154A - Elastic support of radial protection bearing and design method thereof - Google Patents
Elastic support of radial protection bearing and design method thereof Download PDFInfo
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- CN112524154A CN112524154A CN202011475731.3A CN202011475731A CN112524154A CN 112524154 A CN112524154 A CN 112524154A CN 202011475731 A CN202011475731 A CN 202011475731A CN 112524154 A CN112524154 A CN 112524154A
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- elastic support
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- protection bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
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- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The elastic support of radial protection bearing supports between rotor and protection bearing, its characterized in that: the rotor comprises a plurality of layers of elastic support rings coaxially arranged from inside to outside, the elastic support rings are sequentially connected layer by layer from inside to outside, an interlayer gap is formed between every two adjacent elastic support rings, the elastic support ring on the innermost layer is sleeved on the rotor, and the elastic support ring on the outermost layer is in contact with the inner ring of the protective bearing. When the rotor is unstable and falls to generate impact, the elastic deformation of the elastic support ring slows down the impact process, weakens the impact force, buffers the instantaneous impact load on the protective bearing, supports and protects the protective bearing, provides effective support rigidity for the protective bearing, improves the support reliability, prolongs the fall protection service life of the protective bearing, and prolongs the fault-free operation period of the high-speed rotating machine. The invention also provides a design method of the elastic support of the radial protection bearing.
Description
Technical Field
The invention relates to an elastic support of a radial protection bearing and a design method thereof, which are used for elastic support of the radial protection bearing of a high-speed rotating machine.
Background
When the high-speed rotating machine normally works, the rotor is suspended in the middle of the radial bearing stator to protect the bearing from contacting with the rotor; when the bearing control fails or is suddenly powered off, the bearing is protected to start working, the effect of supporting the rotor rotating at a high speed in a short time is achieved, and the rotor is prevented from colliding with the bearing stator. Therefore, the protective bearing is an important part which influences the fault-free operation period and maintenance cost of the rotating equipment. High-speed angular contact ball bearings are usually adopted as protection bearings, but have the defects of limited drop life and high maintenance cost. When the rotor rotating at high speed suddenly loses stability and falls, the rotor suddenly collides with the inner ring of the protective bearing and drives the rolling body of the protective bearing and the retainer to rotate together. The huge impact force can break through the yield limit of the rolling body, the inner ring or the outer ring of the protective bearing and the strength limit of the retainer, so that the protective bearing is damaged. In addition, the inner ring of the protective bearing and the rotating shaft are welded together due to heat generated by friction between the rotor and the protective bearing. Therefore, improving the drop life of the protective bearing is one of the technical problems to be solved urgently in the field of high-speed rotating machinery at present.
Disclosure of Invention
According to the elastic support of the radial protection bearing, when the rotor is unstable and falls to generate impact, the elastic deformation of the elastic support ring slows down the impact process, the impact force is weakened, the instantaneous impact load borne by the bearing is buffered and protected, the support protection is formed on the protection bearing, effective support rigidity is provided for the protection bearing, the support reliability is improved, the falling protection life of the protection bearing is prolonged, and the fault-free operation period of a high-speed rotating machine is prolonged. The invention also provides a design method of the elastic support of the radial protection bearing.
In order to achieve the purpose, the invention adopts the technical scheme that:
the elastic support of radial protection bearing supports between rotor and protection bearing, its characterized in that: the rotor comprises a plurality of layers of elastic support rings coaxially arranged from inside to outside, the elastic support rings are sequentially connected layer by layer from inside to outside, an interlayer gap is formed between every two adjacent elastic support rings, the elastic support ring on the innermost layer is sleeved on the rotor, and the elastic support ring on the outermost layer is in contact with the inner ring of the protective bearing.
Preferably, the elastic support ring at the innermost layer and the elastic support ring at the outermost layer are both of a full-circle structure, and the elastic support ring in the middle is of a segmented combined structure.
Preferably, the number of the middle elastic support rings is at least one layer.
Preferably, the middle elastic support ring comprises a plurality of elastic thin arms uniformly spaced along the circumferential direction and connecting sections integrally formed with the elastic thin arms, and adjacent elastic support rings are connected through the connecting sections.
Preferably, the elastic thin arm is in a circular arc shape, the connecting sections are formed at two ends of the elastic thin arm, the connecting section at one end is positioned on the inner annular wall of the elastic thin arm, and the connecting section at the other end is positioned on the outer annular wall of the elastic thin arm.
Preferably, two opposite side surfaces of the connecting section in the circumferential direction are arc surfaces.
Preferably, the innermost elastic support ring, the outermost elastic support ring and the middle elastic support ring are integrally formed.
The design method of the elastic support of the radial protection bearing is characterized in that: the number, the structure and the size of the elastic support rings and the size of the interlayer gap can be adjusted according to the impact load of the rotor to the protection bearing when the rotor is unstable and falls and the installation space between the rotor and the protection bearing, so that the radial support rigidity of the elastic support of the radial protection bearing can be adjusted.
Preferably, "adjusting the number, structure and size of the elastic support rings and the size of the interlayer gap to adjust the radial support stiffness of the elastic support of the radial protection bearing" means adjusting the radial widths of the inner elastic support ring and the outermost elastic support ring, the number of layers of the middle elastic support rings, the number of the elastic thin arms in each layer of the middle elastic support rings, the position of the connecting section on the elastic thin wall and the circumferential length of the connecting section to adjust the radial support load of the elastic support of the radial protection bearing; and the radial width of the interlayer gap and the circumferential spacing distance of the adjacent elastic thin walls in the elastic support ring in the middle of each layer are adjusted to adjust the radial deformation of the elastic support of the radial protection bearing, so that the radial support rigidity of the elastic support of the radial protection bearing is adjusted.
The invention has the beneficial effects that:
1. the elastic support of the radial protection bearing is supported between the rotor and the protection bearing, and an interlayer gap is formed between the adjacent elastic support rings, so that a radial deformation space is formed between the adjacent elastic support rings, when the rotor is unstable and falls to generate impact, the elastic deformation of the elastic support rings slows down the impact process, the impact force is weakened, the instantaneous impact load borne by the protection bearing is buffered, the support protection is formed on the protection bearing, the falling protection service life of the protection bearing is prolonged, and the fault-free operation period of the high-speed rotating machine is prolonged.
2. The elastic supports on the innermost layer and the outermost layer are of a whole-circle structure and are respectively in contact with the rotor and the protection bearing to play an effective supporting role, the elastic support in the middle is of a segmented combined structure and plays roles of elastic deformation and impact buffering, the elastic thin arms provide main deformation when deforming radial impact, the connecting sections transmit impact force from inside to outside and bear main stress in the deformation process of the elastic thin arms, the circumferential length and the radial length of the elastic thin arms and the connecting sections can be adjusted according to impact load of the rotor on the protection bearing when the rotor is unstable and falls, namely, the gap length between adjacent elastic thin arms and the size of an interlayer gap are adjusted, so that the rigidity of the whole elastic support is changed, effective supporting rigidity is provided for the protection bearing, and supporting reliability is improved.
Drawings
Fig. 1 is a schematic structural view of an elastic support of a radial protection bearing according to the present invention.
Detailed Description
An embodiment of the present invention will be described in detail with reference to fig. 1.
The elastic support of radial protection bearing supports between rotor and protection bearing, its characterized in that: the rotor protection device comprises a plurality of layers of elastic support rings 1 coaxially arranged from inside to outside, the elastic support rings 1 are sequentially connected layer by layer from inside to outside, an interlayer gap 2 is arranged between every two adjacent elastic support rings 1, the elastic support ring 1 on the innermost layer is sleeved on the rotor, and the elastic support ring 1 on the outermost layer is in contact with a protection bearing inner ring.
The elastic support of the radial protection bearing supports between the rotor and the protection bearing, an interlayer gap 2 is arranged between the adjacent elastic support rings 1, a radial deformation space is formed between the adjacent elastic support rings 1, when the rotor is unstable and falls to generate impact, the elastic deformation of the elastic support rings 1 relieves the impact process, the impact force is weakened, the instantaneous impact load borne by the protection bearing is buffered, the support protection is formed on the protection bearing, the falling protection service life of the protection bearing is prolonged, and the fault-free operation period of the high-speed rotating machine is prolonged.
The elastic support ring 1 at the innermost layer and the elastic support ring 1 at the outermost layer are both of a full-circle structure, and the elastic support ring 1 in the middle is of a segmented combined structure. The elastic support of the innermost layer and the elastic support of the outermost layer are of a whole-circle structure and are respectively in contact with the rotor and the protective bearing, an effective supporting effect is achieved, the elastic support in the middle is of a segmented combined structure, the effects of elastic deformation and impact buffering are achieved, and the impact of the falling of the rotor on the protective bearing is reduced.
Wherein the number of the middle elastic supporting rings 1 is at least one layer. As shown in fig. 1, the elastic support ring 1 in the middle has two layers, and the number of layers of the elastic support ring 1 can be adjusted according to the requirement of elastic support so as to effectively and radially support the protection bearing, thereby effectively reducing the impact on the protection bearing when the rotor falls and improving the protection effectiveness.
The middle elastic support ring 1 comprises a plurality of elastic thin arms 11 uniformly spaced along the circumferential direction and connecting sections 12 integrally formed with the elastic thin arms 11, and adjacent elastic support rings 1 are connected through the connecting sections 12. The elastic thin arm 11 provides main deformation when deforming radial impact, the connecting section 12 transfers impact force from inside to outside and bears main stress in the deformation process of the elastic thin arm 11, the lengths of the elastic thin arm and the connecting section can be adjusted according to impact load of a rotor to a protection bearing when the rotor is unstable and falls, effective supporting rigidity is provided for the protection bearing, and supporting reliability is improved.
The elastic thin arm 11 is arc-shaped, the connecting sections 12 are formed at two ends of the elastic thin arm 11, the connecting section 12 at one end is located on the inner annular wall of the elastic thin arm 11, and the connecting section 12 at the other end is located on the outer annular wall of the elastic thin arm 11. The adjacent elastic thin arms 11 in the middle elastic support ring 1 shown in fig. 1 are circumferentially spaced to form a gap, and the circumferential and radial lengths of the elastic thin arms 11 and the connecting section 12, that is, the gap length between the adjacent elastic thin arms 11 and the size of the interlayer gap 2 can be adjusted according to the impact load on the protective bearing when the rotor is unstable and falls, so as to change the rigidity of the whole elastic support, provide effective support rigidity for the protective bearing, and improve the support reliability.
Wherein, the two opposite side surfaces of the connecting section 12 in the circumferential direction are arc surfaces 12.1 to avoid stress concentration.
The elastic support ring 1 on the innermost layer, the elastic support ring on the outermost layer and the elastic support ring 1 in the middle are integrally formed, so that the accumulation of machining errors is avoided, and the structural reliability and stability are improved.
The invention also provides a design method of the elastic support of the radial protection bearing, which is characterized by comprising the following steps: the number, structure and size of the elastic support rings 1 and the size of the interlayer gap 2 can be adjusted according to the impact load of the rotor to the protection bearing when the rotor is unstable and falls and the installation space between the rotor and the protection bearing, so as to adjust the radial support rigidity of the elastic support of the radial protection bearing.
"adjusting the number, structure and size of the elastic support rings 1 and the size of the interlayer gap 2 to adjust the radial support stiffness of the elastic support of the radial protection bearing" means adjusting the radial widths of the inner layer elastic support ring 1 and the outermost layer elastic support ring 1, the number of layers of the middle elastic support ring 1, the number of the elastic thin arms 11 in each layer of the middle elastic support ring 1, the position of the connecting section 12 on the elastic thin wall 11 and the circumferential length of the connecting section 12 to adjust the radial support load of the elastic support of the radial protection bearing; and the radial width of the interlayer gap 2 and the circumferential spacing distance of the adjacent elastic thin walls 11 in the elastic support ring 1 in the middle of each layer are adjusted to adjust the radial deformation of the elastic support of the radial protection bearing, so that the radial support rigidity of the elastic support of the radial protection bearing is adjusted.
The elastic support 1 at the innermost layer and the outermost layer in the elastic support of the radial protection bearing are both of a whole-circle structure and are respectively contacted with the rotor and the protection bearing to play an effective supporting role, the elastic support 1 in the middle is of a segmented combined structure to play the roles of elastic deformation and impact buffering, wherein the elastic thin arm 11 provides main deformation when deforming radial impact, the connecting section transmits impact force from inside to outside and bears main stress in the deformation process of the elastic thin arm, therefore, according to the impact load on the protective bearing when the rotor is unstable and falls, the radial widths of the elastic support ring 1 at the inner layer and the elastic support ring 1 at the outermost layer, the number of layers of the elastic support rings 1 in the middle, the number of the elastic thin arms 11 in the elastic support ring 1 in the middle of each layer, the position of the connecting section 12 on the elastic thin wall 11 and the circumferential length of the connecting section 12 can be adjusted, so that the radial support load of the elastic support of the radial protective bearing can be adjusted; and the radial width of the interlayer gap 2 and the circumferential spacing distance of the adjacent elastic thin walls 11 in the elastic support ring 1 in the middle of each layer are adjusted to adjust the radial deformation of the elastic support of the radial protection bearing, so that the radial support rigidity of the elastic support of the radial protection bearing is adjusted, effective support rigidity is provided for the protection bearing, and the support reliability is improved.
The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (9)
1. The elastic support of radial protection bearing supports between rotor and protection bearing, its characterized in that: the rotor comprises a plurality of layers of elastic support rings (1) coaxially arranged from inside to outside, wherein the elastic support rings (1) are sequentially connected from inside to outside layer by layer, an interlayer gap (2) is formed between every two adjacent elastic support rings (1), the elastic support ring (1) on the innermost layer is sleeved on the rotor, and the elastic support ring (1) on the outermost layer is in contact with the inner ring of a protection bearing.
2. The resilient support for a radial protection bearing of claim 1, wherein: the elastic support ring (1) at the innermost layer and the elastic support ring (1) at the outermost layer are both of a full-circle structure, and the elastic support ring (1) in the middle is of a segmented combined structure.
3. The resilient support for a radial protection bearing of claim 2, wherein: the number of the middle elastic supporting rings (1) is at least one layer.
4. The resilient support of a radial protective bearing of claim 3, wherein: the middle elastic support ring (1) comprises a plurality of elastic thin arms (11) uniformly spaced along the circumferential direction and connecting sections (12) integrally formed with the elastic thin arms (11), and adjacent elastic support rings (1) are connected through the connecting sections (12).
5. The resilient support of a radial protection bearing according to claim 4, wherein: the elastic thin arm (11) is in a circular arc shape, the connecting sections (12) are formed at two ends of the elastic thin arm (11), the connecting section (12) at one end is positioned on the inner annular wall of the elastic thin arm (11), and the connecting section (12) at the other end is positioned on the outer annular wall of the elastic thin arm (11).
6. The resilient support for a radial protection bearing of claim 5, wherein: two opposite side surfaces of the connecting section (12) in the circumferential direction are arc surfaces (12.1).
7. The resilient support for a radial protection bearing of claim 2, wherein: the innermost elastic support ring (1), the outermost elastic support ring and the middle elastic support ring (1) are integrally formed.
8. A design method of an elastic support of a radial protection bearing according to any one of claims 1 to 7, characterized in that: the number, the structure and the size of the elastic support rings (1) and the size of the interlayer gap (2) can be adjusted according to the impact load of the rotor to the protection bearing when the rotor is unstable and falls and the installation space between the rotor and the protection bearing, so that the radial support rigidity of the elastic support of the radial protection bearing can be adjusted.
9. The method of claim 8, wherein: the method comprises the steps of adjusting the number, the structure and the size of elastic support rings (1) and the size of an interlayer gap (2) to adjust the radial support rigidity of the elastic support of the radial protection bearing, wherein the steps of adjusting the radial widths of the elastic support rings (1) at the inner layer and the elastic support rings (1) at the outermost layer, the number of layers of the elastic support rings (1) in the middle, the number of elastic thin arms (11) in each layer of the elastic support rings (1) in the middle, the positions of connecting sections (12) on the elastic thin walls (11) and the circumferential length of the connecting sections (12) are adjusted to adjust the radial support load of the elastic support of the radial protection bearing; and the radial width of the interlayer gap (2) and the circumferential spacing distance of the adjacent elastic thin walls (11) in the elastic support ring (1) in the middle of each layer are adjusted to adjust the radial deformation of the elastic support of the radial protection bearing, so that the radial support rigidity of the elastic support of the radial protection bearing is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011475731.3A CN112524154A (en) | 2020-12-15 | 2020-12-15 | Elastic support of radial protection bearing and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011475731.3A CN112524154A (en) | 2020-12-15 | 2020-12-15 | Elastic support of radial protection bearing and design method thereof |
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| Publication Number | Publication Date |
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| CN112524154A true CN112524154A (en) | 2021-03-19 |
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| CN202011475731.3A Pending CN112524154A (en) | 2020-12-15 | 2020-12-15 | Elastic support of radial protection bearing and design method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700737A (en) * | 2021-06-30 | 2021-11-26 | 平高集团有限公司 | Protection bearing seat and protection bearing mounting structure of magnetic suspension bearing |
| CN115111262A (en) * | 2022-07-04 | 2022-09-27 | 中国舰船研究设计中心 | Ship long shafting anti-impact protection device and design method thereof |
-
2020
- 2020-12-15 CN CN202011475731.3A patent/CN112524154A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700737A (en) * | 2021-06-30 | 2021-11-26 | 平高集团有限公司 | Protection bearing seat and protection bearing mounting structure of magnetic suspension bearing |
| CN113700737B (en) * | 2021-06-30 | 2024-03-19 | 平高集团有限公司 | Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure |
| CN115111262A (en) * | 2022-07-04 | 2022-09-27 | 中国舰船研究设计中心 | Ship long shafting anti-impact protection device and design method thereof |
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