CN108941623B - Composite throttling type static pressure air floatation electric spindle - Google Patents
Composite throttling type static pressure air floatation electric spindle Download PDFInfo
- Publication number
- CN108941623B CN108941623B CN201810026591.8A CN201810026591A CN108941623B CN 108941623 B CN108941623 B CN 108941623B CN 201810026591 A CN201810026591 A CN 201810026591A CN 108941623 B CN108941623 B CN 108941623B
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- China
- Prior art keywords
- end cover
- porous material
- axial
- radial
- axle sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003068 static effect Effects 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 title claims abstract description 7
- 239000011148 porous material Substances 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000000498 cooling water Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 9
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
Abstract
The composite throttling type static pressure air floatation motorized spindle comprises a spindle core (1), an axial fixing sleeve (2), a right shaft sleeve (3), a small hole throttling air inlet channel (4), a spindle body (5), a cooling water inlet channel (6), a motor stator (7), a motor rotor (8), a radial throttling hole (9), a radial porous material (10), a left end cover fixing screw (11), a left end cover (12), an axial throttling hole (13), an axial porous material (14), a porous material throttling air inlet channel (15), a left shaft sleeve (16), a cooling water outlet channel (17), a sealing ring (18), a right end cover fixing screw (19), a right end cover (20), an end cover air outlet groove (21), an external flange plate (22), a flat key (23), a fixing nut (24), an air outlet channel (25) and a shaft sleeve fixing screw (26), compared with a single throttling mode, the main shaft body (5) is internally provided with the small-hole throttling air inlet channel (4) and the porous material throttling air inlet channel (15), and the two throttling modes jointly play a role by controlling the air pressure of the two air inlet channels, so that the stability of rotation of the shaft core is improved, and the problem of reduction of the stability of rotation of the shaft core is solved.
Description
Technical field:
the invention relates to a composite throttling type static pressure air-float motorized spindle, belongs to the field of ultra-precise static pressure gas lubrication.
The background technology is as follows:
the air bearing uses gas as lubricant, uses the viscosity of the gas, and (3) increasing the pressure of the gas in the gap, thereby suspending the shaft. In contrast to conventional oil-lubricated bearings, the friction resistance is extremely low, the noise is small, the precision is high, the service life is long, the applicable temperature range is wide, the applicable speed range is large, and the like. Therefore, the method is widely applied to industries such as national defense, new energy, machine tools, medical treatment and the like, and has obvious superiority especially in the technical fields of high-speed rotary machinery and ultra-precise instruments.
In the static pressure air bearing in the prior art, only a single throttling mode is usually adopted, and small hole throttling or porous material throttling is mainly adopted. Among them, the air bearing adopting the small hole throttling mode is one of the most common and most widely used forms of air hydrostatic bearings, and is easy to process and has very good dynamic stability. The air bearing surface throttled by the porous material generates more uniform pressure distribution, thereby having high bearing capacity and static rigidity and good dynamic stability.
In the small-hole throttling type static pressure air bearing, the shaft core rotates at a high speed, so that the gas in the gap between the shaft core and the bearing generates additional circumferential flow, namely diffusion flow exists, and the problems of uneven pressure, reduced stability and the like are generated. In addition, when the air bearing is impacted by the outside, the stability of the main shaft in a high-speed running state is easily damaged, and when the main shaft is seriously damaged, the main shaft stops rotating, so that the service life of the main shaft is shortened.
The invention comprises the following steps:
in order to overcome the defects of the prior art, the invention aims to provide a composite throttling type static pressure air floatation electric spindle, because radial throttling holes and radial porous materials are uniformly distributed on a shaft sleeve along the circumferential direction, high-pressure gas is sprayed onto a spindle core from the radial throttling holes, when the air pressure of the sprayed gas is too high or too low to cause the stability of the high-speed rotation of the spindle core to be reduced, the stability of the spindle core in the high-speed rotation is improved by adjusting the air pressure of the high-pressure gas sprayed onto the spindle core from the radial porous materials.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the invention comprises the following steps: axle core, axial fixed cover, right axle sleeve, aperture throttle intake duct, main shaft body, cooling water inlet channel, motor stator, motor rotor, radial orifice, radial porous material, left end cover set screw, left end cover, axial orifice, axial porous material, porous material throttle intake duct, left axle sleeve, cooling water outlet channel, sealing washer, right end cover set screw, right end cover, end cover air outlet groove, external flange, flat key, fixation nut, air outlet channel, axle sleeve set screw, its characterized in that: the main shaft body is internally provided with a small hole throttling air inlet channel, a porous material throttling air inlet channel, a cooling water outlet channel and an air outlet channel, the right shaft sleeve and the left shaft sleeve are internally provided with a small hole throttling air inlet channel, a porous material throttling air inlet channel and a porous material throttling air outlet channel, the left end cover is internally provided with an end cover air outlet groove, the right end cover is internally provided with an end cover air outlet groove, the sealing ring is arranged on the junction surface between the main shaft body and the right shaft sleeve, the left end cover and the left shaft sleeve are fixed on the main shaft body through shaft sleeve fixing screws, the motor stator is arranged between the right shaft sleeve and the left shaft sleeve, the right shaft sleeve and the left shaft sleeve are internally provided with radial throttling holes and radial porous materials, the main shaft body and the left end cover are internally provided with axial throttling holes and axial porous materials, the radial throttling holes and the axial throttling holes are communicated with the small hole throttling air inlet channel, the radial porous material and the axial porous material are communicated with the porous material throttling air inlet channel, the left end cover is fixed on the main shaft body through a left end cover fixing screw, the left end protruding part of the shaft core is positioned in a space surrounded by the main shaft body and the left end cover, the motor rotor is arranged on the shaft core, the axial fixing sleeve is arranged between the motor rotor and the right end cover, the right end cover is fixed with the main shaft body and the right shaft sleeve through a right end cover fixing screw, the external flange plate is arranged on the shaft core through a flat key, the external flange plate is fixed on the shaft core through a fixing nut, radial throttle holes and radial porous materials are uniformly distributed on the circumferences of the right shaft sleeve and the left shaft sleeve, the number of the radial throttle holes is six or eight or twelve, the axial throttle holes and the axial porous materials are uniformly distributed on the main shaft body and the left end cover, the number of the axial throttle holes is six or eight or twelve, the radial porous material and the axial porous material are porous graphite, bronze or ceramic.
The invention is characterized in that:
because radial throttle holes and radial porous materials are uniformly distributed on the shaft sleeve along the same circumferential surface, high-pressure gas is sprayed onto the shaft core from the radial throttle holes, and when the stability of high-speed rotation of the shaft core is reduced due to too high or too low gas pressure of the sprayed gas, the stability of the shaft core in high-speed rotation is improved by adjusting the gas pressure of the high-pressure gas sprayed onto the shaft core from the radial porous materials.
Description of the drawings:
fig. 1 illustrates a structural diagram of the present invention.
Figure 2 illustrates an air outlet channel diagram of the present invention.
1. A shaft core; 2. an axial fixing sleeve; 3. a right sleeve; 4. small hole throttle air inlet channel; 5. a main shaft body; 6. cooling the water inlet channel; 7. a motor stator; 8. a motor rotor; 9. radial orifice; 10. a radially porous material; 11. a left end cover fixing screw; 12. a left end cover; 13. an axial orifice; 14. an axially porous material; 15. throttling the air inlet channel by using a porous material; 16. a left shaft sleeve; 17. cooling the water outlet channel; 18. a seal ring; 19. a right end cover fixing screw; 20. a right end cover; 21. an end cover air outlet groove; 22. externally connected with a flange plate; 23. a flat key; 24. a fixing nut; 25. an air outlet channel; 26. and (5) fixing the screw by the shaft sleeve.
The specific embodiment is as follows:
the following describes the operation of the present invention with reference to the drawings.
The invention comprises a shaft core 1, an axial fixing sleeve 2, a right shaft sleeve 3, a small hole throttle inlet channel 4, a main shaft body 5, a cooling inlet channel 6, a motor stator 7, a motor rotor 8, a radial throttle orifice 9, a radial porous material 10, a left end cover fixing screw 11, a left end cover 12, an axial throttle orifice 13, an axial porous material 14, a porous material throttle inlet channel 15, a left shaft sleeve 16, a cooling outlet channel 17, a sealing ring 18, a right end cover fixing screw 19, a right end cover 20, an end cover outlet channel 21, an external flange 22, a flat key 23, a fixing nut 24, an outlet channel 25 and a shaft sleeve fixing screw 26, wherein the main shaft body 5 is internally provided with the small hole throttle inlet channel 4, the porous material throttle inlet channel 15, the cooling inlet channel 6, the cooling outlet channel 17 and the outlet channel 25, the small hole throttle inlet channel 4, the porous material throttle inlet channel 15 and the air outlet channel 25 are respectively arranged in the right shaft sleeve 3 and the left shaft sleeve 16, the left end cover 12 is internally provided with a small hole throttle inlet 4 and a porous material throttle inlet 15, the right end cover 20 is internally provided with an end cover air outlet groove 21, a sealing ring 18 is arranged on the joint surface between the main shaft body 5 and the right shaft sleeve 3, the left end cover 12 and the left shaft sleeve 16, the right shaft sleeve 3 and the left shaft sleeve 16 are fixed on the main shaft body 5 through shaft sleeve fixing screws 26, the motor stator 7 is arranged between the right shaft sleeve 3 and the left shaft sleeve 16, the right shaft sleeve 3 and the left shaft sleeve 16 are internally provided with radial throttle holes 9 and radial porous materials 10, the main shaft body 5 and the left end cover 12 are internally provided with axial throttle holes 13 and axial porous materials 14, the radial throttle holes 9 and the axial throttle holes 13 are communicated with the small hole throttle inlet 4, the radial porous materials 10 and the axial porous materials 14 are communicated with the porous material throttle inlet 15, the left end cover 12 is fixed on the main shaft body 5 through the left end cover fixing screws 11, the left end protruding part of the shaft core 1 is positioned in a space surrounded by the main shaft body 5 and the left end cover 12, the motor rotor 8 is arranged on the shaft core 1, the axial fixing sleeve 2 is arranged between the motor rotor 8 and the right end cover 20, the right end cover 20 is fixed with the main shaft body 5 and the right shaft sleeve 3 through the right end cover fixing screw 19, the external flange 22 is arranged on the shaft core 1 through the flat key 23, the external flange 22 is fixed on the shaft core 1 through the fixing nut 24, radial orifices 9 and radial porous materials 10 are uniformly distributed on the circumferences of the right shaft sleeve 3 and the left shaft sleeve 16, the number of the radial orifices 9 is six or eight or twelve, the number of the axial orifices 13 and the axial porous materials 14 are uniformly distributed on the main shaft body 5 and the left end cover 12, the number of the axial orifices 13 is six or eight or twelve, and the radial porous materials 10 and the axial porous materials 14 are porous graphite or bronze or ceramic.
Claims (3)
1. The utility model provides a compound throttle formula static pressure air supporting electricity main shaft, including axle core (1), axial fixing sleeve (2), right side axle sleeve (3), aperture throttle intake duct (4), main shaft body (5), cooling intake duct (6), motor stator (7), motor rotor (8), radial orifice (9), radial porous material (10), left end cover set screw (11), left end cover (12), axial orifice (13), axial porous material (14), porous material throttle intake duct (15), left axle sleeve (16), cooling outlet channel (17), sealing washer (18), right side end cover set screw (19), right-hand member lid (20), end cover air outlet groove (21), external flange (22), flat key (23), fixation nut (24), air outlet duct (25), axle sleeve set screw (26), its characterized in that: the main shaft body (5) in be equipped with aperture throttle intake duct (4), porous material throttle intake duct (15), cooling intake duct (6), cooling water outlet channel (17) and air outlet channel (25), all be equipped with aperture throttle intake duct (4) in right side axle sleeve (3) and left axle sleeve (16), porous material throttle intake duct (15) and air outlet channel (25), be equipped with aperture throttle intake duct (4) and porous material throttle intake duct (15) in left side end cover (12), be equipped with end cover air outlet groove (21) in right side end cover (20), sealing washer (18) set up on the interface between main shaft body (5) and right side axle sleeve (3), left side end cover (12) and left axle sleeve (16), right side axle sleeve (3), left axle sleeve (16) are fixed on main shaft body (5) through axle sleeve set screw (26), motor stator (7) are installed between right side axle sleeve (3) and left axle sleeve (16), all be equipped with radial orifice (9) and radial porous material (10) in right side axle sleeve (3) and left axle sleeve (16), all be equipped with radial orifice (13) and axial orifice (13) and radial orifice (13) are connected with air inlet duct (13), radial porous material (10) and axial porous material (14) are communicated with porous material throttle intake duct (15), left end cover (12) are fixed on main shaft body (5) through left end cover set screw (11), the protruding portion in axle core (1) left end is located the space that main shaft body (5) and left end cover (12) enclose, motor rotor (8) are installed on axle core (1), axial fixation cover (2) set up between motor rotor (8) and right-hand member lid (20), right-hand member lid (20) are fixed with main shaft body (5) and right-hand member axle sleeve (3) through right-hand member lid set screw (19), external flange (22) are set up on axle core (1) through parallel key (23), fixation nut (24) are fixed external flange (22) on axle core (1).
2. The composite throttle type static pressure air floatation motorized spindle as set forth in claim 1, wherein: radial orifices (9) and radial porous materials (10) are uniformly distributed on the circumferences of the right shaft sleeve (3) and the left shaft sleeve (16), the number of the radial orifices (9) is six or eight or twelve, axial orifices (13) and axial porous materials (14) are uniformly distributed on the main shaft body (5) and the left end cover (12), and the number of the axial orifices (13) is six or eight or twelve.
3. The composite throttle type static pressure air floatation motorized spindle as set forth in claim 1, wherein: the radial porous material (10) and the axial porous material (14) are porous graphite, bronze or ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810026591.8A CN108941623B (en) | 2018-01-02 | 2018-01-02 | Composite throttling type static pressure air floatation electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810026591.8A CN108941623B (en) | 2018-01-02 | 2018-01-02 | Composite throttling type static pressure air floatation electric spindle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108941623A CN108941623A (en) | 2018-12-07 |
| CN108941623B true CN108941623B (en) | 2024-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810026591.8A Active CN108941623B (en) | 2018-01-02 | 2018-01-02 | Composite throttling type static pressure air floatation electric spindle |
Country Status (1)
| Country | Link |
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| CN (1) | CN108941623B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695380B (en) * | 2019-11-16 | 2024-04-19 | 洛阳传顺机械设备有限公司 | Ultrasonic air static pressure motorized spindle |
| CN114310427B (en) * | 2022-01-26 | 2023-04-07 | 郑州大学 | Axial feeding and rotating device for ultra-precision machining |
| CN114589320A (en) * | 2022-02-07 | 2022-06-07 | 北京海普瑞森超精密技术有限公司 | Full-cooling type gas static pressure main shaft |
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| CN108941623A (en) | 2018-12-07 |
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