CN109236860B - Combined bearing for rotary machinery rotor - Google Patents
Combined bearing for rotary machinery rotor Download PDFInfo
- Publication number
- CN109236860B CN109236860B CN201811449380.1A CN201811449380A CN109236860B CN 109236860 B CN109236860 B CN 109236860B CN 201811449380 A CN201811449380 A CN 201811449380A CN 109236860 B CN109236860 B CN 109236860B
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- China
- Prior art keywords
- air
- rotor
- stator
- air guide
- hole
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 33
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 2
- 239000011800 void material Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 48
- 238000005339 levitation Methods 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0607—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being retained in a gap, e.g. squeeze film bearings
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/041—Passive magnetic bearings with permanent magnets on one part attracting the other part
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to the technical field of motors, in particular to a combined bearing for a rotary machine rotor, which comprises a machine case, a stator, a rotor, a permanent magnet bearing, a thrust bearing and a supporting device, wherein the stator is positioned in the machine case and fixedly connected with the machine case, the rotor is positioned in the stator, and an air guide gap is formed between the rotor and the stator; the two ends of the stator are respectively provided with an air inlet channel, an air outlet channel and an air guide channel, gas sequentially enters the air guide channel and the air guide gap through the air inlet channels and supports the rotor, and the gas in the air guide gap is discharged from the air outlet channel; the permanent magnet bearing and the a thrust bearing is provided in the stator; the support means comprises a support cylinder for supporting the journal of the rotor by the gas of the gas-guiding void. The invention provides a combined bearing for a rotary machine rotor, which can effectively increase the reliability of the rotor and has low cost.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a combined bearing for a rotary machine rotor.
Background
In the conventional rotary machine, the rotor is supported in both the axial direction and the radial direction. The support may be achieved by means of lubricated, magnetic, pneumatic bearings, such as air bearings, which (also called air bearings) refer to sliding bearings with a gas (usually air, but possibly other gases) as lubricant. Air has less viscosity than oil, is high temperature resistant, and has no pollution, so that it can be used in high-speed machine, instrument and radioactive device, but its load capacity is lower than that of oil. The air bearing has obvious characteristics, and the pressure air film has a homogenization effect, so that the vibration is small, and the rotation precision is high; the viscosity of the gas is low, so that the friction loss is small, and the heating deformation is also small; the contact between objects is avoided, and the abrasion is theoretically considered to be avoided, so that the service life is long; the air bearing is pollution-free to the environment, so that the sealing problem is not required to be considered. Based on the characteristics, the aerostatic support bearing is widely applied to aerospace industry, semiconductor industry and ultra-precision machining equipment and measuring instruments.
A common feature of these bearings is that the length of the shaft is increased. In addition to pneumatic bearings, complex and expensive support systems are required. Foil pneumatic bearings do not require such a support system, the rotation of which generates lifting forces on the bearings, but currently their bearing strength is much less than that required for high output or high pressure rotary machines.
Disclosure of Invention
In order to solve the problems, the invention provides a combined bearing for a rotor of a rotary machine, which can effectively increase the reliability of the rotor and reduce the cost
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a combined bearing for a rotor of a rotary machine comprises a machine case, a stator, a rotor, a permanent magnet bearing, a thrust bearing and a supporting device,
the stator is positioned in the case and fixedly connected with the case, the rotor is positioned in the stator, and an air guide gap is formed between the rotor and the stator; an air inlet channel, an air outlet channel, at least two air guide rings and a plurality of air guide channels are arranged in the stator, the air inlet channel is positioned at one end of the stator, one end of the air inlet channel sequentially penetrates through the stator and the case, the other end of the air inlet channel is communicated with the two air guide rings, at least the two air guide rings are arranged at intervals along the axial direction of the stator, each air guide ring is arranged around the periphery of the air guide gap, and each air guide ring is in conductive connection with the air guide gap through a plurality of air guide channels; the exhaust channel is positioned at one end, far away from the air inlet channel, in the stator, one end of the exhaust channel sequentially penetrates through the stator and the case, and the other end of the exhaust channel is in conductive connection with the air guide gap;
the permanent magnet bearings are embedded in the stator and fixedly connected with the stator, and the two opposite sides of each air guide ring are respectively provided with one permanent magnet bearing; the thrust bearing is positioned in the air guide gap, and one side of the thrust bearing is fixedly connected with the stator;
the supporting device comprises a supporting cylinder, the supporting cylinder is sleeved outside a shaft neck of the rotor, one end of the supporting cylinder is fixedly connected with the chassis, one surface of the supporting cylinder facing the rotor is provided with an inclined structure, one end of the inclined structure, which is far away from the chassis, is gradually inclined to the rotor, a penetrating supporting air hole is formed in the supporting cylinder, one end of the supporting air hole is in conductive connection with the air guide gap, and the other end of the supporting air hole faces the shaft neck;
the gas entering from the air inlet channel sequentially passes through the air guide ring and the air guide channel to enter the air guide gap, and the gas in the air guide gap flows to the exhaust channel and the supporting air hole respectively.
Further, a plurality of throttle cavities and throttle holes are arranged in the thrust bearing, one end of each throttle cavity is of an arc opening structure and faces the direction of gas flow, the other end of each throttle cavity is in conductive connection with the throttle cavity, each throttle hole of the throttle hole is of a multi-section structure and penetrates through the thrust bearing, the radius of each throttle hole of the throttle hole is gradually reduced along the direction of gas flow, and the joint of every two adjacent throttle holes of each throttle hole is of an arc structure.
Further, the supporting air hole comprises a first air hole and a second air hole, the first air hole and the second air hole are positioned on different cross sections, the first air hole and the second air hole are arranged at intervals, the first air hole is inclined to the radial direction of the shaft neck, and the second air hole is inclined in the opposite direction to the first air hole; the distance between the first air holes of two adjacent cross sections is equal to the distance between the second air holes of two adjacent cross sections;
the supporting device further comprises an adjusting cylinder, an iron block and an electromagnet, wherein the adjusting cylinder is sleeved outside the supporting cylinder in a sliding mode, adjusting holes are formed in the adjusting cylinder in a penetrating mode, and the distance between the adjusting holes with different cross sections is equal to the distance between two adjacent first air holes with different cross sections; the iron block is fixedly connected with the adjusting cylinder, two electromagnets are respectively arranged on two sides of the iron block and are fixed with the stator, when one electromagnet is electrified, the iron block is attracted, and the adjusting cylinder slides along with the electromagnet, so that the adjusting hole is communicated with the first air hole or the second air hole.
Further, the gas discharged into the first gas hole or the second gas hole is discharged in a direction opposite to the rotation direction of the rotor.
Further, a sliding groove is concavely formed in the outer wall of the supporting cylinder, and a sliding block matched with the sliding groove is arranged in the adjusting cylinder.
Further, still include fixing device, fixing device includes mounting, roller bearing and four pneumatic telescopic links, the stator is equipped with four standing grooves, two the standing groove is close to the one end of axle journal, two other standing grooves keep away from in the one end of axle journal, four pneumatic telescopic links are located four in the standing groove, pneumatic telescopic link one end with stator fixed connection, the other end with mounting fixed connection, the mounting keep away from pneumatic telescopic link's one end be with the arc structure that the rotor agrees with, and with a plurality of roller bearing rotates to be connected.
Further, the roller is provided with a buffer rubber ring.
Further, a coupling is provided at an end of the rotor remote from the journal.
The invention has the advantages that,
1. by injecting gas into the air inlet channel, the gas sequentially passes through the air guide ring and the air guide channel to enter the air guide gap, the gas in the air guide gap flows to the air outlet channel respectively, and the gas in the air guide gap provides levitation force for the rotor; the gas flows to the supporting cylinder, and as the inclined structure is arranged on one surface of the supporting cylinder, which is close to the rotor, one end of the inclined structure, which is close to the chassis, is gradually inclined to the stator, when the gas flows to the supporting cylinder, a gas film with rigidity and damping is formed, the gas film supports the journal, and the pressure of the journal, which is close to one side of the chassis, is higher than that of the other side, so that the stability of the journal during rotation can be increased; the gas in the gas guide gap supports the rotor through the supporting cylinder and the thrust bearing, and the permanent magnet bearing generates magnetic force to the rotor and supports the rotor, so that a complex and expensive supporting system is replaced, and the cost is reduced.
2. When the gas in the gas guide gap passes through the thrust bearing, the additional volume can be reduced under the action of the throttling cavity, so that the micro-vibration of the rotor is reduced, and the positioning precision and the movement precision of the rotor are improved; the radius of each orifice of the orifice is gradually reduced along the gas flowing direction, so that the gas is subjected to a plurality of throttling processes, and the throttling effect is increased; the permanent magnet bearing can provide magnetic levitation force for the rotor, and stability of the rotor is improved.
3. When the journal rotates, the journal can form an air film, and the air exhausted through the supporting air hole is opposite to the rotating direction of the rotor, so that the air film formed by the supporting air hole and the air film of the journal are in contact with each other, the tightness of the journal and the chassis is improved, and the tightness of the journal can be ensured when the journal is used in a submarine environment.
4. The first air holes and the second air holes are alternately arranged, the first air holes are inclined to the radial direction of the shaft neck, and the second air holes are opposite to the first air holes in inclination direction, so that the rotation direction of the air film formed by the first air holes and the second air holes is opposite, and the air film formed by the supporting cylinder is opposite to the air film of the shaft neck when the rotor rotates forwards or reversely by switching the first air holes or the second air holes; under the effect of the electromagnet, when a certain electromagnet is electrified, the iron block is attracted when the certain electromagnet is electrified, and the adjusting cylinder slides along with the iron block, so that the adjusting hole is conducted with the first air hole or the second air hole, and the switching between the first air hole and the second air hole is realized.
5. When the rotor stops and stops the air feed, the supporting force of rotor disappears, the rotor receives gravity and presses to the stator, the rotor and the stator are easy to damage, and when the supporting gas is lack, the rotor can be damaged due to the rotation inertia of the rotor, under the action of the fixing device, when the rotor stops and stops the air feed, the pneumatic telescopic rod stretches, the roller on the fixing piece supports the rotor, the rotor and the stator are prevented from being damaged, and the rotor can be guaranteed to be still fixed at the central position of the stator after stopping, so that the next starting is facilitated.
Drawings
Fig. 1 is a schematic view showing a structure of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
Fig. 2 is a schematic sectional view of a stator of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
Fig. 3 is a schematic view showing a thrust bearing structure of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure of a thrust bearing of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
Fig. 5 is a schematic view showing a supporting structure of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
Fig. 6 is a section A-A of the support cylinder of fig. 5.
Fig. 7 is a schematic view of an adjusting cylinder structure of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
Fig. 8 is a schematic structural view of a fixing device of a combination bearing for a rotor of a rotary machine according to a preferred embodiment of the present invention.
In the figure, 1-machine case, 2-stator, 21-air inlet channel, 211-air guide ring, 22-air outlet channel, 23-air guide channel, 24-placing groove, 3-rotor, 31-air guide gap, 32-journal, 4-permanent magnet bearing, 5-thrust bearing, 51-throttle cavity, 52-throttle hole, 6-supporting device, 61-supporting cylinder, 611-tilting structure, 62-supporting air hole, 621-first air hole, 622-second air hole, 63-adjusting cylinder, 64-iron block, 65-electromagnet, 66-sliding groove, 661-sliding block, 7-fixing piece, 71-roller, 711-buffering rubber ring, 72-pneumatic telescopic rod and 8-coupling.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 8, a combined bearing for a rotor of a rotary machine includes a housing 1, a stator 2, a rotor 3, a permanent magnet bearing 4, a thrust bearing 5, a supporting device 6 and a fixing device.
The stator 2 is positioned in the case 1 and fixedly connected with the case 1, the rotor 3 is positioned in the stator 2, and an air guide gap 31 is formed between the rotor 3 and the stator 2. The stator 2 is internally provided with an air inlet channel 21, an air outlet channel 22, at least two air guide rings 211 and a plurality of air guide channels 23, wherein the air inlet channel 21 is positioned at one end of the stator 2, one end of the air inlet channel 21 sequentially penetrates through the stator 2 and the machine case 1, the other end of the air inlet channel 21 is communicated with the two air guide rings 211, at least two air guide rings 211 are arranged at intervals along the axial direction of the stator 2, each air guide ring 211 is arranged around the periphery of the air guide gap 31, and each air guide ring 211 is connected with the air guide gap 31 in a conducting manner through the plurality of air guide channels 23. The exhaust passage 22 is located at one end of the stator 2 far away from the air inlet passage 21, one end of the exhaust passage 22 sequentially passes through the stator 2 and the machine case 1, and the other end of the exhaust passage 22 is in conductive connection with the air guide gap 31, so that air sequentially passes through the air guide ring 211 and the air guide passage 23 from the air inlet passage 21 to enter the air guide gap 31, and the air in the air guide gap 31 flows to the exhaust passage 22 respectively, so that the air in the air guide gap 31 is utilized to provide levitation force for the rotor 3.
The permanent magnet bearings 4 are embedded in the stator 2 and fixedly connected with the stator 2, and the permanent magnet bearings 4 are arranged on two sides of each air guide ring 211. The permanent magnet bearing 4 can provide magnetic levitation force for the rotor 3, and stability of the rotor 3 is improved.
The thrust bearing 5 is located in the air guide gap 31 and fixedly connected with the stator 2 at one side. In the present embodiment, each air guide channel 23 is correspondingly provided with a thrust bearing 5.
The thrust bearing 5 is internally provided with a plurality of throttle cavities 51 and throttle holes 52, one end of each throttle cavity 51 is of an arc opening structure and faces the gas flowing direction, the other end of each throttle cavity 51 is in conductive connection with the throttle cavity 51, each throttle hole 52 is of a multi-section structure and penetrates through the thrust bearing 5, the radius of each throttle hole 52 is gradually reduced along the gas flowing direction, and the joint of two adjacent throttle holes of each throttle hole 52 is of an arc structure. When the gas in the gas-guiding gap 31 passes through the thrust bearing 5, the additional volume of the gas can be reduced by the throttle chamber 51, thereby reducing the micro-vibration of the rotor 3 and improving the positioning precision and the movement precision of the rotor 3; the radius of each orifice of the orifice 52 gradually decreases in the direction of gas flow, causing the gas to undergo a plurality of throttling processes, thereby increasing the throttling effect.
The supporting device 6 comprises a supporting cylinder 61, the supporting cylinder 61 is sleeved outside the shaft neck 32 of the rotor 3, one end of the supporting cylinder 61 is fixedly connected with the machine case 1, one surface of the supporting cylinder 61, which is close to the rotor 3, is provided with an inclined structure 611, one end of the inclined structure 611, which is far away from the machine case 1, is gradually inclined to the rotor 3, a penetrating supporting air hole 62 is formed in the supporting cylinder 61, one end of the supporting air hole 62 is in conductive connection with the air guide gap 31, and the other end of the supporting air hole 62 faces the shaft neck 32. Because the inclined structure 611 is arranged on the surface of the supporting cylinder 61, which is close to the rotor 3, when the gas flows to the supporting cylinder 61, a gas film with rigidity and damping is formed, and the gas film supports the journal 32, so that the pressure of the journal 32, which is close to one side of the case 1, is higher than the pressure of the journal 32, and the stability of the journal 32 during rotation can be increased.
The support air holes 62 include a first air hole 621 and a second air hole 622. The first air holes 621 and the second air holes 622 are located on different cross sections, the first air holes 621 and the second air holes 622 are arranged alternately, the first air holes 621 incline to the radial direction of the shaft journal 32, and the second air holes 622 incline to the opposite direction of the first air holes 621. The first air holes 621 of two adjacent cross sections are equally spaced from the second air holes 622 of two adjacent cross sections.
In the present embodiment, the gas discharged to the first gas hole 621 or the second gas hole 622 is selected according to the rotation direction of the rotor 3 to ensure that the direction of flow after the gas is discharged is opposite to the rotation direction of the rotor 3. When the journal 32 rotates, an air film is formed, and the flowing direction of the air discharged from the support air hole 62 is opposite to the rotating direction of the rotor 3, so that the air film formed by the support air hole 62 and the air film of the journal 32 are in contact with each other, the tightness of the journal 32 and the case 1 is improved, the tightness of the journal can be ensured when the air film is used in a submarine environment, and dust can be isolated.
The first air holes 621 and the second air holes 622 are arranged alternately, the first air holes 621 incline to the radial direction of the shaft neck 32, the second air holes 622 incline to the opposite direction to the first air holes 621, so that the rotation direction of the air film formed by the first air holes 621 and the second air holes 622 is opposite, and the air film formed by the support cylinder 61 is opposite to the air film of the shaft neck when the rotor 3 rotates forward or reversely by opening the first air holes to close the second air holes or opening the second air holes to close the first air holes;
the supporting device 6 further comprises an adjusting cylinder 63, an iron block 64 and an electromagnet 65, wherein the adjusting cylinder 63 is sleeved outside the supporting cylinder 61 in a sliding way, the adjusting cylinder 63 is provided with adjusting holes 631 in a penetrating way, and the distance between the adjusting holes 631 with different cross sections is equal to the distance between two adjacent first air holes 621 with different cross sections; the iron block 64 is fixedly connected with the adjusting cylinder 63, two electromagnets 65 are arranged, the two electromagnets 65 are respectively positioned on two sides of the iron block 64 and are fixed with the stator 2, when one electromagnet 65 is electrified, the iron block 64 is attracted, the adjusting cylinder 63 slides along with the attraction, and the adjusting hole 631 is communicated with the first air hole 621 or the second air hole 622. Fig. 7 shows a state where the first air hole 621 is closed and the second air hole 622 is opened.
In this embodiment, the direction of rotation of the air film formed by the first air hole 621 is opposite to the direction of rotation of the air film formed by the rotor 3 rotating in the forward direction, and the direction of rotation of the air film formed by the second air hole 622 is opposite to the direction of rotation of the air film formed by the rotor 3 rotating in the reverse direction. When the rotor 3 rotates positively, an electromagnet 65 is controlled to be electrified, the iron block 64 is attracted, the adjusting cylinder 63 slides along with the electromagnet, the adjusting hole 631 is overlapped with the first air hole 621, and the adjusting cylinder 63 seals the second air hole 622; when the rotor 3 rotates reversely, the other electromagnet 65 is controlled to be electrified, the iron block 64 is attracted, the adjusting cylinder 63 slides along with the electromagnet, the adjusting hole 631 is overlapped with the second air hole 622, the first air hole 621 is closed by the adjusting cylinder 63, and the air film formed by the supporting cylinder 61 is opposite to the air film of the journal.
In the present embodiment, the outer wall of the support cylinder 61 is concavely provided with a slide groove 66, and the adjustment cylinder 63 is provided with a slide block 661 engaged with the slide groove 66. The slide groove 66 and the slide block 661 can prevent the support cylinder 61 from being rotationally offset so that the adjustment hole 631 is not in communication with the first air hole 62 or the second air hole 622.
The fixing device comprises a fixing piece 7, a rolling shaft 71 and four pneumatic telescopic rods 72, wherein the stator 2 is provided with four placing grooves 24, two placing grooves 24 are close to one end of a shaft neck 32, the other two placing grooves 24 are far away from one end of the shaft neck 32, the four pneumatic telescopic rods 72 are respectively located in the four placing grooves 24, one end of each pneumatic telescopic rod 72 is fixedly connected with the stator 2, the other end of each pneumatic telescopic rod 72 is fixedly connected with the fixing piece 7, and one end of each fixing piece 7, which is far away from the pneumatic telescopic rod 72, is of an arc-shaped structure matched with the rotor 3 and is rotationally connected with the corresponding rolling shafts 71.
When the rotor 3 stops rotating and stopping supplying air, the supporting force of the rotor 3 disappears, the rotor 3 is pressed to the stator 2 by gravity, the rotor 3 and the stator 2 are easy to damage, and when the supporting air is lack, the rotor 3 and the stator 2 are damaged due to the rotation inertia of the rotor 3, under the action of a fixing device, when the rotor 3 stops rotating and stopping supplying air, the pneumatic telescopic rod 72 stretches, the roller 71 on the fixing piece 7 supports the rotor, the rotor 3 and the stator 2 are prevented from being damaged, and the rotor 3 can be ensured to be still fixed at the center position of the stator 2 after stopping, so that the next starting is facilitated.
The roller 71 is provided with a buffer rubber ring 711, and the buffer rubber ring 711 can buffer the rotor 3 to prevent the rotor 3 from directly colliding with the roller 71.
The end of the rotor 3 remote from the journal 32 is provided with a coupling 8. The coupling 8 can overload protect the rotor and prevent the rotor 3 from bearing excessive load.
The gas flowing direction of the invention is that the gas entering from the gas inlet channel 21 sequentially passes through the gas guide ring 211 and the gas guide channel 23 to enter the gas guide gap 31, and the gas in the gas guide gap 31 flows to the gas outlet channel 22 and the supporting air hole 62 respectively. Under the action of the gas, the whole case is in a sealed state, so that the rotor and the stator of the device in the case can be protected from water and dust, and levitation force can be provided for the rotor 3 and the shaft neck 32.
Claims (6)
1. A combined bearing for a rotary machine rotor is characterized by comprising a machine case (1), a stator (2), a rotor (3), a permanent magnet bearing (4), a thrust bearing (5) and a supporting device (6),
the stator (2) is positioned in the case (1) and is fixedly connected with the case (1), the rotor (3) is positioned in the stator (2), and an air guide gap (31) is formed between the rotor (3) and the stator (2); an air inlet channel (21), an air outlet channel (22), at least two air guide rings (211) and a plurality of air guide channels (23) are arranged in the stator (2), the air inlet channel (21) is positioned at one end of the stator (2), one end of the air inlet channel (21) sequentially penetrates through the stator (2) and the machine case (1), the other end of the air inlet channel is communicated with the two air guide rings (211), at least the two air guide rings (211) are arranged at intervals along the axial direction of the stator (2), each air guide ring (211) is arranged around the periphery of the air guide gap (31), and each air guide ring (211) is connected with the air guide gap (31) in a conducting manner through a plurality of air guide channels (23); the exhaust channel (22) is positioned at one end, far away from the air inlet channel (21), in the stator (2), one end of the exhaust channel (22) sequentially penetrates through the stator (2) and the machine case (1), and the other end of the exhaust channel is in conductive connection with the air guide gap (31);
the permanent magnet bearings (4) are embedded into the stator (2) and fixedly connected with the stator (2), and the permanent magnet bearings (4) are respectively arranged on the two opposite sides of each air guide ring (211); the thrust bearing (5) is positioned in the air guide gap (31) and one side of the thrust bearing is fixedly connected with the stator (2);
the supporting device (6) comprises a supporting cylinder (61), the supporting cylinder (61) is sleeved outside a shaft neck (32) of the rotor (3) and one end of the supporting cylinder is fixedly connected with the machine case (1), one surface of the supporting cylinder (61) facing the rotor (3) is provided with an inclined structure (611), one end of the inclined structure (611), far away from the machine case (1), is gradually inclined to the rotor (3), a penetrating supporting air hole (62) is formed in the supporting cylinder (61), one end of the supporting air hole (62) is in conductive connection with the air guide gap (31), and the other end of the supporting air hole is towards the shaft neck (32);
the gas entering from the air inlet channel (21) sequentially passes through the air guide ring (211) and the air guide channel (23) to enter the air guide gap (31), and the gas in the air guide gap (31) flows to the air exhaust channel (22) and the supporting air hole (62) respectively; the support air hole (62) comprises a first air hole (621) and a second air hole (622), the first air hole (621) and the second air hole (622) are positioned on different cross sections, the first air hole (621) and the second air hole (622) are arranged at intervals, the first air hole (621) is inclined to the radial direction of the shaft neck (32), and the second air hole (622) is opposite to the first air hole (621); the distance between the first air holes (621) of two adjacent cross sections is equal to the distance between the second air holes (622) of two adjacent cross sections;
the supporting device (6) further comprises an adjusting cylinder (63), an iron block (64) and an electromagnet (65), the adjusting cylinder (63) is sleeved outside the supporting cylinder (61) in a sliding mode, adjusting holes (631) are formed in the adjusting cylinder (63) in a penetrating mode, and the distance between the adjusting holes (631) with different cross sections is equal to the distance between two adjacent first air holes (621) with different cross sections; the iron block (64) is fixedly connected with the adjusting cylinder (63), two electromagnets (65) are arranged, the two electromagnets (65) are respectively positioned on two sides of the iron block (64) and are fixed with the stator (2), when one electromagnet (65) is electrified, the iron block (64) is attracted, the adjusting cylinder (63) slides along with the electromagnet, and the adjusting hole (631) is communicated with the first air hole (621) or the second air hole (622);
and a coupler (8) is arranged at one end of the rotor (3) far away from the shaft neck (32).
2. A combination bearing for a rotary machine rotor according to claim 1, wherein: the thrust bearing is characterized in that a plurality of throttle cavities (51) and throttle holes (52) are arranged in the thrust bearing (5), one end of each throttle cavity (51) is of an arc opening structure and faces the gas flowing direction, the other end of each throttle cavity is in communication connection with the throttle cavity (51), each throttle hole (52) is of a multi-section structure and penetrates through the thrust bearing (5), the radius of each throttle hole (52) is gradually reduced along the gas flowing direction, and the joint of every two adjacent throttle holes of each throttle hole (52) is of an arc structure.
3. A combination bearing for a rotary machine rotor according to claim 1, wherein: the direction of the gas discharged into the first air hole (621) or the second air hole (622) is opposite to the rotation direction of the rotor (3).
4. A combination bearing for a rotary machine rotor according to claim 1, wherein: the outer wall of the supporting cylinder (61) is concavely provided with a sliding groove (66), and the adjusting cylinder (63) is internally provided with a sliding block (661) which is matched with the sliding groove (66).
5. A combination bearing for a rotary machine rotor according to claim 1, wherein: still include fixing device, fixing device includes mounting (7), roller bearing (71) and four pneumatic telescopic link (72), stator (2) are equipped with four standing grooves (24), two standing grooves (24) are close to the one end of axle journal (32), and two other standing grooves (24) keep away from the one end of axle journal (32), four pneumatic telescopic link (72) are located four in standing grooves (24), pneumatic telescopic link (72) one end with stator (2) fixed connection, the other end with mounting (7) fixed connection, the one end that mounting (7) kept away from pneumatic telescopic link (72) be with rotor (3) fit's arc structure, and with a plurality of roller bearing (71) rotate to be connected.
6. A combination bearing for a rotary machine rotor as claimed in claim 5 wherein: the roller (71) is provided with a buffer rubber ring (711).
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| CN201811449380.1A CN109236860B (en) | 2018-11-30 | 2018-11-30 | Combined bearing for rotary machinery rotor |
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| CN201811449380.1A CN109236860B (en) | 2018-11-30 | 2018-11-30 | Combined bearing for rotary machinery rotor |
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| CN109236860B true CN109236860B (en) | 2024-04-16 |
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| CN113684565B (en) * | 2021-07-17 | 2022-08-05 | 浙江龙仕达科技股份有限公司 | Winding device of twisting machine |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0632739U (en) * | 1992-09-29 | 1994-04-28 | 光洋精工株式会社 | Bearing device |
| CN101304195A (en) * | 2008-07-01 | 2008-11-12 | 上海大学 | Ultraprecise electric spindle supported mixedly by a plurality of types of bearing |
| CN101431308A (en) * | 2007-11-06 | 2009-05-13 | 卓向东 | Magnetic suspension power system used for airplane engine and gas compression apparatus |
| CN102449329A (en) * | 2009-03-26 | 2012-05-09 | 达涅利机械设备股份公司 | Connection component for oil film bearings |
| CN102632256A (en) * | 2012-04-24 | 2012-08-15 | 南京师范大学 | Gas magnetic bearing electric spindle and control system thereof |
| CN104227032A (en) * | 2014-09-25 | 2014-12-24 | 广州市昊志机电股份有限公司 | Air-floated high-speed motorized spindle |
| CN206442203U (en) * | 2017-02-20 | 2017-08-25 | 上海优耐特斯压缩机有限公司 | The cooling system of high speed permanent magnet motor rotor |
| CN207873151U (en) * | 2018-02-06 | 2018-09-18 | 中国计量大学 | A kind of multiple throttle type static pressure air-bearing electro spindle |
| CN208060155U (en) * | 2018-04-25 | 2018-11-06 | 中国科学院合肥物质科学研究院 | A kind of Aerostatic thrust bearing high speed performance test system |
| CN108869558A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of control method of bearing, rotor-support-foundation system and bearing |
| CN209195957U (en) * | 2018-11-30 | 2019-08-02 | 广西恒达电机科技有限公司 | A kind of combination bearing for rotary machine rotor |
-
2018
- 2018-11-30 CN CN201811449380.1A patent/CN109236860B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0632739U (en) * | 1992-09-29 | 1994-04-28 | 光洋精工株式会社 | Bearing device |
| CN101431308A (en) * | 2007-11-06 | 2009-05-13 | 卓向东 | Magnetic suspension power system used for airplane engine and gas compression apparatus |
| CN101304195A (en) * | 2008-07-01 | 2008-11-12 | 上海大学 | Ultraprecise electric spindle supported mixedly by a plurality of types of bearing |
| CN102449329A (en) * | 2009-03-26 | 2012-05-09 | 达涅利机械设备股份公司 | Connection component for oil film bearings |
| CN102632256A (en) * | 2012-04-24 | 2012-08-15 | 南京师范大学 | Gas magnetic bearing electric spindle and control system thereof |
| CN104227032A (en) * | 2014-09-25 | 2014-12-24 | 广州市昊志机电股份有限公司 | Air-floated high-speed motorized spindle |
| CN206442203U (en) * | 2017-02-20 | 2017-08-25 | 上海优耐特斯压缩机有限公司 | The cooling system of high speed permanent magnet motor rotor |
| CN108869558A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of control method of bearing, rotor-support-foundation system and bearing |
| CN207873151U (en) * | 2018-02-06 | 2018-09-18 | 中国计量大学 | A kind of multiple throttle type static pressure air-bearing electro spindle |
| CN208060155U (en) * | 2018-04-25 | 2018-11-06 | 中国科学院合肥物质科学研究院 | A kind of Aerostatic thrust bearing high speed performance test system |
| CN209195957U (en) * | 2018-11-30 | 2019-08-02 | 广西恒达电机科技有限公司 | A kind of combination bearing for rotary machine rotor |
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| CN109236860A (en) | 2019-01-18 |
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