CN109660057B - Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof - Google Patents
Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof Download PDFInfo
- Publication number
- CN109660057B CN109660057B CN201811576017.6A CN201811576017A CN109660057B CN 109660057 B CN109660057 B CN 109660057B CN 201811576017 A CN201811576017 A CN 201811576017A CN 109660057 B CN109660057 B CN 109660057B
- Authority
- CN
- China
- Prior art keywords
- motor
- radial
- deflection
- bearing
- shell
- 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.)
- Active
Links
- 230000002457 bidirectional effect Effects 0.000 title claims description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 70
- 239000007788 liquid Substances 0.000 claims description 48
- 238000001816 cooling Methods 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- 210000004907 gland Anatomy 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- 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
- F16C32/0614—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 supplied under pressure, e.g. aerostatic bearings
-
- 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
- F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
- F16C32/0696—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for both radial and axial load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a unidirectional rotation permanent magnet high-speed motor, which comprises a motor rotor, a motor stator, a motor shell, a front bearing mechanism, a rear bearing mechanism and an axial thrust mechanism, wherein the motor stator is arranged on the motor shell; the front bearing mechanism and the rear bearing mechanism are provided with at least one circle of radial throttle holes and at least one circle of deflection throttle holes, the radial throttle holes of the same circle are uniformly distributed around the central shaft of the motor rotor, the deflection throttle holes of the same circle are also uniformly distributed around the central shaft of the motor rotor, the radial throttle holes are arranged along the radial direction of the motor rotor, the deflection throttle holes and the diameter of the motor rotor have a deflection angle, and the deflection direction of the deflection angle is the rotation direction of the motor rotor; the motor housing is provided with an air passage extending to the front bearing mechanism, the rear bearing mechanism and the axial thrust mechanism. The invention provides radial supporting force for the rotor, and also provides tangential thrust for the rotor, which is beneficial to the increase of the rotating speed of the rotor. The bearing capacity of the bearing mechanism can be improved by 30-50%, and the rotating speed of the rotor can be improved by 30-50%.
Description
Technical Field
The invention relates to the field of motors, in particular to a unidirectional rotation permanent magnet high-speed motor and an air bearing thereof.
Background
With the continuous development of industrial technology, the requirements of people on the speed and the precision of a motor are higher and higher, and the traditional bearing can not meet the supporting requirement of a motor main shaft. The gas bearing is easy to obtain, has no viscosity and no pollution due to the non-contact supporting mode, and can be more suitable for the requirements of a high-speed motor, thereby meeting the requirements of higher rotating speed, better precision and longer service life.
As disclosed in chinese patent 2011101376070, an air suspension air supply adjustable high-speed motor direct-drive blower comprises a compressor impeller, a permanent magnet synchronous motor rotor, a motor stator, a front radial air bearing, a rear radial air bearing, an axial thrust air bearing, a volute and a motor housing, wherein one end of the permanent magnet synchronous motor rotor is connected with the compressor impeller, the motor stator drives the permanent magnet synchronous motor rotor to rotate, the front radial air bearing, the rear radial air bearing and the axial thrust air bearing suspend and support the permanent magnet synchronous motor rotor, the volute is arranged outside the compressor impeller, and the motor housing is positioned at the periphery of the motor stator, the front radial air bearing, the rear radial air bearing, the axial thrust air bearing and the permanent magnet synchronous motor rotor. In the above patent, the radial air bearing mainly provides radial air to the bearing gap, so that a lubrication film with certain bearing and rigidity is formed in the gap, and the radial air bearing mainly has the effects of reducing friction force, reducing the influence of the friction force on the rotating speed of the motor spindle, and not enhancing the rotating speed of the motor spindle.
In addition, the permanent magnet motor is a synchronous motor which generates a synchronous rotating magnetic field by excitation of a permanent magnet, the permanent magnet is used as a rotor to generate the rotating magnetic field, and the electric energy conversion efficiency is high. The existing motor directly adopts a whole permanent magnet as a rotor, has high material cost and poor heat dissipation, greatly influences the toughness due to strong rigidity, and is easy to wear.
Disclosure of Invention
The invention aims to overcome the defects and provide the unidirectional rotating permanent magnet high-speed motor with strong supporting force, high rotating speed and high conversion efficiency.
In order to achieve the above object, the technical solution of the present invention is: a unidirectional rotation permanent magnet high-speed motor comprises a motor rotor, a motor stator, a motor shell, a front bearing mechanism, a rear bearing mechanism and an axial thrust mechanism; the motor stator is fixed in the motor shell; the motor rotor is also positioned in the motor shell and penetrates through the motor stator; the front end and the rear end of the motor rotor are respectively supported on the shell through a front bearing mechanism and a rear bearing mechanism; the axial thrust mechanism is sleeved at the rear end of the motor rotor and is fixed at the rear end of the motor shell; the motor rotor is a permanent magnet motor rotor; the motor shell is provided with an air passage which extends to the front bearing mechanism, the rear bearing mechanism and the axial thrust mechanism; the front bearing mechanism and the rear bearing mechanism are provided with at least one circle of radial throttle holes and at least one circle of deflection throttle holes, the radial throttle holes with the same circle are uniformly distributed around the central shaft of the motor rotor, the deflection throttle holes with the same circle are uniformly distributed around the central shaft of the motor rotor, the radial throttle holes are arranged along the radial direction of the motor rotor, the deflection throttle holes and the diameter of the motor rotor have a deflection angle, and the deflection direction of the deflection angle is the rotation direction of the motor rotor.
Preferably, the front bearing mechanism and the rear bearing mechanism both adopt bidirectional air bearings, and at least one circle of deflection throttle holes and at least one circle of radial throttle holes are distributed in the bidirectional air bearings along the axial direction.
Preferably, the bidirectional air bearing comprises two circles of deflection orifices and one circle of radial orifices, and the radial orifice is positioned in the middle of the two circles of deflection orifices.
Preferably, the front bearing mechanism and the rear bearing mechanism are formed by a radial bearing and a deflection bearing, wherein the radial bearing is distributed with at least one circle of radial orifices, and the deflection bearing is distributed with at least one circle of deflection orifices.
Preferably, the motor rotor comprises a piece of magnetic steel, two aluminum blocks, a front motor shaft assembly, a rear motor shaft assembly and a coupling sleeve, wherein the two aluminum blocks are symmetrically arranged on two sides of the magnetic steel, the front motor shaft assembly and the rear motor shaft assembly are respectively connected to the end faces of the two aluminum blocks in a clamping manner, the magnetic steel, the aluminum blocks, the front end of the front motor shaft assembly and the rear end of the rear motor shaft assembly are sleeved in the coupling sleeve and are in interference fit with the coupling sleeve, and the front motor shaft assembly and the rear motor shaft assembly are provided with radially outwards protruding stop steps.
Preferably, the motor housing comprises a cooling jacket, a housing, a front end cover and a rear end cover; the cooling sleeve is nested in the shell, and two ends of the cooling sleeve are respectively connected with the front end cover and the rear end cover; the front bearing mechanism and the rear bearing mechanism are respectively arranged on the front end cover and the rear end cover; the hollow part of the shell is a large-diameter section, a conical section and a small-diameter section, and the large-diameter section and the small-diameter section are in transition through the conical section; one end of the cooling sleeve is nested in the small-diameter section, and the rest part is limited to the large-diameter section and the conical section; the outer side of the side wall of the cooling sleeve is integrally formed with a spiral rib which is used for separating the space between the cooling sleeve and the shell into a spiral circulating water channel; the side wall of the shell is provided with a liquid inlet pipe and a liquid outlet pipe which are axially arranged, the inner side of the side wall of the shell is provided with a liquid inlet through hole and a liquid outlet through hole, the outer side of the outer side wall is provided with a liquid inlet and a liquid outlet, the liquid inlet through hole and the liquid inlet are communicated with the liquid inlet pipe, the liquid outlet through hole and the liquid outlet through hole are communicated with the liquid outlet pipe, and the liquid inlet through hole and the liquid outlet through hole are respectively communicated with two ends of the circulating water channel; the outer side wall of the shell is also provided with an air inlet, the side wall of the shell is provided with axial air passages in a penetrating way, the front end cover and the rear end cover are provided with radial air passages, the air inlet is communicated to the axial air passages, two ends of the axial air passages are respectively communicated with the radial air passages on two sides, and the radial air passages extend to the periphery of the bidirectional air bearing, the radial bearing and/or the deflection bearing.
Preferably, the axial thrust mechanism comprises a thrust disc cover, a front end face nozzle seat, a thrust disc, a rear end face nozzle seat and a gland which are arranged from front to back; the front end face and the rear end face of the nozzle seat are provided with vent holes axially; a first air cavity is formed between the front end face nozzle seat and the thrust disc cover, and a radial air passage of the rear end cover is communicated with the first air cavity; the rear end face nozzle seat and the gland are also provided with a second air cavity which is communicated with the outside; the thrust disk is fixed at the rear end of the motor rotor.
The invention also discloses a bidirectional air bearing. The bidirectional air bearing is provided with at least one circle of deflection throttle holes and at least one circle of radial throttle holes along the axial direction, the radial throttle holes are arranged along the radial direction of the motor rotor, the deflection throttle holes and the diameter of the motor rotor are provided with a deflection angle, and the deflection direction of the deflection angle is the rotation direction of the electronic rotor.
Further, the device comprises two circles of deflection orifices and one circle of radial orifices, and the radial orifices are positioned between the two circles of deflection orifices.
Further, 3-12 deflection orifices are distributed in one circle of deflection orifices, and the deflection angle is 30-60 degrees; 3-12 radial orifices are distributed in one circle of radial orifices.
By adopting the technical scheme, the invention has the beneficial effects that: the bearing mechanism for supporting the motor rotor is provided with radial orifices and is used for forming an air film to float the rotating shaft; the motor rotor is provided with a deflection orifice communicated with the rotation of the motor rotor, so that radial supporting force can be given to the rotating shaft, tangential thrust can be given to the rotating shaft, and the increase of the rotating speed of the rotor is facilitated. Through the design, the bearing capacity of the bearing mechanism is improved by 30-50%, and the rotating speed of the rotor can be improved by 30-50%.
The motor rotor adopts the multistage structure, separates by the aluminium piece between magnet steel and the motor shaft subassembly, and the hardness of aluminium piece is less than the magnet steel, and both compare, and the aluminium piece has "elasticity", is favorable to reducing rotor's vibrations, and aluminium piece heat dissipation is good simultaneously, is favorable to motor rotor's heat dissipation.
The cooling jacket integrated into one piece has spiral rib to separate the space of cooling jacket and shell into spiral helicine circulation water course, simple structure, processing is convenient, is favorable to the fast assembly of equipment, has good cooling effect simultaneously. The hollow part of the shell is formed by multiple sections, and comprises a guide section, a large-diameter section, a conical section and a small-diameter section, so that the cooling jacket is quickly and accurately nested in the shell, and the production efficiency of the equipment is improved.
Drawings
FIG. 1 is a right side view of a bi-directional air bearing;
FIG. 2 is a cross-sectional view at two-way air bearings A and B;
FIG. 3 is a cross-sectional view at a bi-directional air bearing C;
FIG. 4 is a perspective view of the structure of the lower right side of the bi-directional air bearing;
fig. 5 is a schematic perspective view of embodiments 2, 4, 5;
FIG. 6 is a schematic perspective view of embodiment 3;
FIG. 7 is a cross-sectional view of examples 2,4, 5;
FIG. 8 is a cross-sectional view of example 3;
FIG. 9 is a cross-sectional view of a deflection bearing;
FIG. 10 is a cross-sectional view of a radial bearing
FIG. 11 is a schematic structural view of a motor rotor according to embodiment 4-5;
FIG. 12 is a schematic view of the structure of a cooling jacket;
FIG. 13 is a cross-sectional view of the housing;
FIG. 14 is a side view of the housing;
FIG. 15 is a cross-sectional view at housing l;
The main reference numerals illustrate: (11, deflection orifice; 12, radial orifice; 2, motor rotor; 21, magnet steel; 22, aluminum block; 23, front motor shaft assembly; 24, rear motor shaft assembly; 25, coupling sleeve; 26, shut-off step; 3, motor stator; 4, motor housing; 41, front end cap; 42, rear end cap; 43, intake port; 44, axial orifice; 45, radial airway; 46, housing; 461, guide section; 462, large diameter section; 463, conical section; 464, small diameter section; 47, cooling jacket; 471, spiral rib; 472, limit groove; 551, bi-directional air bearing; 2, radial bearing; 53, deflection bearing; 61, thrust disc cover; 62, front end face nozzle holder; 63, thrust disc; 64, rear end face nozzle holder; 65, gland; 66, first air chamber; 67, second air chamber; 71, pressurizing impeller; 72, centrifuge front cover; 73, 81, liquid inlet tube; 82, liquid outlet tube; 83, liquid inlet through-hole; 84, liquid outlet through-hole; 85, liquid inlet, 86, liquid outlet.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
It should be noted that directional words mentioned in the present invention are, for example: upper, lower, front, rear, left, right, etc. are provided for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1-4, a bi-directional air bearing includes a bearing body. The bearing body is axially provided with at least one circle of deflection throttle holes 11 and at least one circle of radial throttle holes 12. The deflection orifice 11 has a deflection angle a with the diameter of the motor rotor, and the deflection direction of the deflection angle a is the rotation direction of the motor rotor, and the deflection angle a is 30-60 degrees. The radial orifice 12 means that it is arranged in the radial direction of the motor rotor. The deflection orifices 11 of the same circle are uniformly distributed around the circumference of the central shaft of the motor rotor, and 3-12 deflection orifices 11 can be distributed in each circle of deflection orifices 11. The radial orifices 12 of the same circle are also evenly distributed around the circumference of the central shaft of the motor rotor, and each circle of radial orifices 12 can respectively comprise 3-12 radial orifices 12.
As shown in fig. 2 and 3, two circles of deflection orifices 11 and one circle of radial orifices 12 are axially distributed in the present embodiment, and one circle of radial orifices 12 is located in the middle of the two circles of deflection orifices 11. Each circle of deflection orifices 11 has 8 deflection orifices 11, and the deflection angle is 45 degrees; and 8 radial orifices per turn of radial orifice 12.
As shown in fig. 4, the outer peripheral surface of the bearing body has radial flanges by which the orifices (11, 12) of adjacent layers are separated, but the flanges are notched at positions corresponding to the orifices for air to circulate between the multi-layer orifices.
The orifice design of the invention is consistent with the orifice design of the prior air bearing, and has a convex structure with small inside and large outside.
Example 2
As shown in fig. 5 and 7, a unidirectional rotation permanent magnet high-speed motor comprises a motor rotor 2, a motor stator 3, a motor housing 4, a front bearing mechanism, a rear bearing mechanism and an axial thrust mechanism.
The front and rear bearing mechanisms of this embodiment are identical, and the bidirectional air bearing of embodiment 1 is used. The front end cover 41 and the rear end cover 42 of the motor housing 4 are respectively sleeved with a bidirectional air bearing 51, and one ends of the front end cover 41 and the rear end cover 42 of the embodiment are embedded into the motor housing 4. The motor stator 3 is fixed in a cavity of the motor housing 4. The motor rotor 2 passes through the middle of the motor stator 3, and the front and rear ends are respectively supported by the front and rear bidirectional air bearings 51.
As shown in fig. 7, the axial thrust mechanism of the present embodiment mainly includes a thrust plate 63, a washer, and a gland 65, which are disposed in order from front to back along the central axis of the motor rotor 2, the thrust plate 63 being immediately adjacent to the rear side face of the rear end cover 42. The bolts pass through the gland 65 and the gasket in turn and finally lock to the rear end cap 42. The thrust plate 63 is sandwiched between the rear end cap 42 and the pressing cover 65, and a gasket is provided on the outer periphery of the thrust plate 63 to isolate it from the outside. Meanwhile, the thrust disc 63 is in clearance fit with the motor rotor 2 and is fixed to the rear end of the motor rotor 2 by bolts. A first air chamber 66 is formed between the thrust disc 63 and the gland 65 of the present embodiment.
The outer side wall of the motor shell 4 is also provided with an air inlet 43, the side wall of the motor shell 4 is provided with an axial air passage 44 which is axially arranged, the front end cover and the rear end cover (41 and 42) are both provided with radial air passages 45, the air inlet 43 is communicated with the axial air passage 44, two ends of the axial air passage 44 are respectively communicated with the radial air passages 45 at two sides, the radial air passages 45 extend to the bidirectional air bearing 51 and the rear end cover 42, and the radial air passages 45 of the rear end cover 42 are also communicated with the first air cavity 66.
The mechanism mainly pushes the thrust disc 63 forward through the first air cavity 66, so that the motor rotor 2 is prevented from moving forward.
To further illustrate the application of the present invention, the motor of this embodiment is exemplified as a driving device of a centrifugal machine plus a turbine, and the front end of the motor rotor 2 protrudes outside the motor housing 4 and is keyed with a scroll booster wheel 71. The motor housing 4 and the scroll boost impeller 71 are separated by a centrifuge front cover 72. A peripheral scroll 73 of the scroll-supercharging impeller 71.
Example 3
As shown in fig. 6, a unidirectional rotation permanent magnet high-speed motor includes a motor rotor 2, a motor stator 3, a motor housing 4, a front bearing mechanism, a rear bearing mechanism, and an axial thrust mechanism.
As shown in fig. 9-10, the front and rear bearing mechanisms of this embodiment are symmetrical and are each comprised of a radial bearing 52 and a tilt bearing 53. The front end cover 41 and the rear end cover 42 of the motor housing 4 are respectively sleeved with a radial bearing 52 and a deflection bearing 53, and the front end cover and the rear end cover (41, 42) of the embodiment are I-shaped. The motor stator 3 is fixed in a cavity of the motor housing 4. The motor rotor 2 passes through the middle of the motor stator 3, and the front and rear ends are supported by a radial bearing 52 and a deflection bearing 53, respectively. Radial bearing 52 the radial bearing is distributed with two circles of radial orifices 12, each circle of radial orifices 12 having 8 radial orifices 12. The deflection bearings 53 are distributed with two circles of deflection orifices 11, each circle of deflection bearings 53 is provided with 8 deflection orifices 11, the diameter of each deflection orifice 11 and the diameter of the motor rotor 2 are provided with a deflection angle b, the deflection direction of the deflection angle b is the rotation direction of the motor rotor, and the deflection angle b is 45 degrees.
As shown in fig. 8, the axial thrust mechanism of the present embodiment mainly includes a thrust disk cover 61, a front end face nozzle holder 62, a thrust disk 63, a gasket, a rear end face nozzle holder 64, and a gland 65, which are sequentially arranged front and rear along the central axis of the motor rotor 2, the thrust disk cover 61 being closely adjacent to the rear side face of the rear end cover 42. The bolts pass through the gland 65, the rear end face nozzle holder 64, the gasket, the front end face nozzle holder 62, the thrust disc cover 61 in order, and finally lock to the rear end cover 42. The thrust plate 63 is sandwiched between the front face nozzle holder 62 and the rear face nozzle holder 64, and its periphery is isolated from the outside by a gasket. Meanwhile, the thrust disc 63 is in clearance fit with the motor rotor 2 and is fixed to the rear end of the motor rotor 2 by bolts. A first air chamber 66 is formed between the front face nozzle holder 62 and the thrust disc cover 61 in this embodiment, and a second air chamber 67 is also formed between the rear end cap nozzle holder 64 and the gland, and both the front face nozzle holder 62 and the rear face nozzle holder 64 are provided with air holes (not shown) axially provided for aligning with the thrust disc 61. The structure is a reinforced plate of an axial thrust structure and is used for motors with a large number of bearings and a complex structure.
The outer side wall of the motor shell 4 is also provided with an air inlet 43, the side wall of the motor shell 4 is provided with an axial air passage 44 which is axially arranged, the front end cover and the rear end cover (41 and 42) are both provided with radial air passages 45, the air inlet 43 is communicated with the axial air passage 44, the two ends of the axial air passage 44 are respectively communicated with the radial air passages 45 at the two sides, the radial air passages 45 extend to the radial bearing 52, the deflection bearing 53 and the rear end cover 42, the radial air passage 45 of the rear end cover 42 is also communicated with a first air cavity 66 through a thrust disc cover 61, and a second air cavity 67 is communicated with the outside through a through hole of a gland 65.
The thrust disc 63 is balanced mainly through the pressure difference between the first air cavity 66 and the second air cavity 67, the front-back movement of the motor rotor 2 is avoided, and the stability is higher.
To further illustrate the application of the present invention, the motor of this embodiment is exemplified as a driving device of a centrifugal machine plus a turbine, and the front end of the motor rotor 2 protrudes outside the motor housing 4 and is keyed with a scroll booster wheel 71. The motor housing 4 and the scroll boost impeller 71 are separated by a centrifuge front cover 72. A peripheral scroll 73 of the scroll-supercharging impeller 71.
Example 4
As shown in fig. 5 and 7, a unidirectional rotation permanent magnet high-speed motor comprises a motor rotor 2, a motor stator 3, a motor housing 4, a front bearing mechanism, a rear bearing mechanism and an axial thrust mechanism.
The front and rear bearing mechanisms of this embodiment are identical, and the bidirectional air bearing of embodiment 1 is used. The front end cover 41 and the rear end cover 42 of the motor housing 4 are respectively sleeved with a bidirectional air bearing 51, and one ends of the front end cover 41 and the rear end cover 42 of the embodiment are embedded into the motor housing 4. The motor stator 3 is fixed in a cavity of the motor housing 4. The motor rotor 2 passes through the middle of the motor stator 3, and the front and rear ends are respectively supported by the front and rear bidirectional air bearings 51.
As shown in fig. 11, the motor rotor 2 is composed of one magnetic steel 21, two aluminum blocks 22, a front motor shaft assembly 23, a rear motor shaft assembly 24, and a coupling sleeve 25. The two aluminum blocks 22 are symmetrically arranged on two sides of the magnetic steel 21, and the front motor shaft assembly 23 and the rear motor shaft assembly 24 are respectively connected to the end surfaces of the two aluminum blocks 22 in a clamping manner. The magnetic steel 21, the aluminum block 22, the front end 23 of the front motor shaft assembly and the rear end 24 of the rear motor shaft assembly are sleeved in the coupling sleeve 25 and are in interference fit with the coupling sleeve 25. For ease of positioning assembly, both the front motor shaft assembly 23 and the rear motor shaft assembly 24 have radially outwardly protruding stop steps 26.
As shown in fig. 7, the axial thrust mechanism of the present embodiment mainly includes a thrust plate 63, a washer, and a gland 65, which are disposed in order from front to back along the central axis of the motor rotor 2, the thrust plate 63 being immediately adjacent to the rear side face of the rear end cover 42. The bolts pass through the gland 65 and the gasket in turn and finally lock to the rear end cap 42. The thrust plate 63 is sandwiched between the rear end cap 42 and the pressing cover 65, and a gasket is provided on the outer periphery of the thrust plate 63 to isolate it from the outside. Meanwhile, the thrust disc 63 is in clearance fit with the motor rotor 2 and is fixed to the rear end of the motor rotor 2 by bolts. A first air chamber 66 is formed between the thrust disc 63 and the gland 65 of the present embodiment.
The outer side wall of the motor shell 4 is also provided with an air inlet 43, the side wall of the motor shell 4 is provided with an axial air passage 44 which is axially arranged, the front end cover and the rear end cover (41 and 42) are both provided with radial air passages 45, the air inlet 43 is communicated with the axial air passage 44, two ends of the axial air passage 44 are respectively communicated with the radial air passages 45 at two sides, the radial air passages 45 extend to the bidirectional air bearing 51 and the rear end cover 42, and the radial air passages 45 of the rear end cover 42 are also communicated with the first air cavity 66.
The mechanism mainly pushes the thrust disc 63 forward through the first air cavity 66, so that the motor rotor 2 is prevented from moving forward.
To further illustrate the application of the present invention, the motor of this embodiment is exemplified as a driving device of a centrifugal machine plus a turbine, and the front end of the motor rotor 2 protrudes outside the motor housing 4 and is keyed with a scroll booster wheel 71. The motor housing 4 and the scroll boost impeller 71 are separated by a centrifuge front cover 72. A peripheral scroll 73 of the scroll-supercharging impeller 71.
Example 5
As shown in fig. 5, a unidirectional rotation permanent magnet high-speed motor includes a motor rotor 2, a motor stator 3, a motor housing 4, a front bearing mechanism, a rear bearing mechanism, and an axial thrust mechanism.
The front and rear bearing mechanisms of this embodiment are identical, and the bidirectional air bearing of embodiment 1 is used. The front end cover 41 and the rear end cover 42 of the motor housing 4 are respectively sleeved with a bidirectional air bearing 51, and one ends of the front end cover 41 and the rear end cover 42 of the embodiment are embedded into the motor housing 4. The motor stator 3 is fixed in a cavity of the motor housing 4. The motor rotor 2 passes through the middle of the motor stator 3, and the front and rear ends are respectively supported by the front and rear bidirectional air bearings 51.
As shown in fig. 11, the motor rotor 2 is composed of one magnetic steel 21, two aluminum blocks 22, a front motor shaft assembly 23, a rear motor shaft assembly 24, and a coupling sleeve 25. The two aluminum blocks 22 are symmetrically arranged on two sides of the magnetic steel 21, and the front motor shaft assembly 23 and the rear motor shaft assembly 24 are respectively connected to the end surfaces of the two aluminum blocks 22 in a clamping manner. The magnetic steel 21, the aluminum block 22, the front end 23 of the front motor shaft assembly and the rear end 24 of the rear motor shaft assembly are sleeved in the coupling sleeve 25 and are in interference fit with the coupling sleeve 25. For ease of positioning assembly, both the front motor shaft assembly 23 and the rear motor shaft assembly 24 have radially outwardly protruding stop steps 26.
As shown in fig. 11 to 15, the motor housing 4 includes a cooling jacket 47, an outer shell 46, a front end cover 41, and a rear end cover 42. The cooling jacket is nested within the housing 46 and the front and rear end caps (41, 42) are secured together by bolting the cooling jacket 47 to both ends of the housing 46.
The inner side wall of the cooling jacket 47 is provided with a stator limit rib 471 for realizing accurate and rapid installation of the motor stator 3.
The hollow portion of the housing 46 is a guide section 461, a large diameter section 462, a tapered section 463 and a small diameter section 464 in this order. The guide section 461 is gradually reduced from outside to inside, and the side wall thereof forms an angle c of 15 ° with the side wall of the large-diameter section 462. The diameter of the larger diameter section 11 is at least 2cm greater than the diameter of the smaller diameter section 13, which forms a diameter difference, facilitating rapid insertion of the smaller head of the cooling jacket 47. The angle d between the large diameter section 462 and the tapered section 463 is 165 °. The transition between the large diameter section 462 and the small diameter section 464 is via a tapered section 463.
The outside of the side wall of the cooling jacket 47 is integrally formed with a spiral rib 471, and the spiral rib 471 is used to partition the space between the cooling jacket 47 and the housing 46 into a spiral circulation water channel. The left and right ends outside the side wall of the cooling jacket 47 are provided with limit grooves 472 integrally, each end of the cooling jacket 47 is provided with two adjacent limit grooves 472, and sealing rings (not shown) are embedded in the limit grooves 472 to prevent leakage of cooling liquid. When the cooling jacket 47 is fitted in the housing 46, the limiting groove 472 at the right end of the cooling jacket 47 is located in the small-diameter section 464, and the limiting groove 472 at the other portions including the left end is located in the large-diameter section 462 and the tapered section 463.
The side wall of the housing 46 is formed with an axially disposed inlet tube 81, outlet tube 82 and axial air passage 44. The liquid inlet pipe 81 is formed by drilling a hole on the front side of the shell 2 in a backward direction from the annular end surface, is a blind hole which does not penetrate through the outer shell, and then is plugged with a sealing plug to plug the opening end of the liquid inlet pipe 81. The outlet tube 82 is formed by drilling forward a circular end face of the rear side of the outer sleeve 46, which is also a blind hole that does not penetrate the outer sleeve, and the open end of the outlet tube 82 is similarly plugged with a sealing plug. The liquid inlet pipe 81 is communicated with the circulating water channel through a liquid inlet through hole 83, and the liquid outlet pipe 82 is communicated with the circulating water channel through a liquid outlet through hole 84. The inlet through holes 83 are drilled radially outwardly from the inside of the side wall of the housing 46, and the outlet through holes 84 are also drilled radially outwardly from the inside of the side wall of the housing 46. The liquid inlet through hole 83 and the liquid outlet through hole 84 are respectively communicated with the front end and the rear end of the circulating water channel. The liquid inlet 85 of the liquid inlet pipe 81 and the liquid outlet 86 of the liquid outlet pipe 82 are positioned on the outer side surface of the side wall of the shell 1. The liquid inlet 85 is drilled radially inward from the outside of the side wall of the housing 46 and the liquid outlet 86 is drilled radially inward from the outside of the side wall of the housing 46.
As shown in fig. 7, the axial thrust mechanism of the present embodiment mainly includes a thrust plate 63, a washer, and a gland 65, which are disposed in order from front to back along the central axis of the motor rotor 2, the thrust plate 63 being immediately adjacent to the rear side face of the rear end cover 42. The bolts pass through the gland 65 and the gasket in turn and finally lock to the rear end cap 42. The thrust plate 63 is sandwiched between the rear end cap 42 and the pressing cover 65, and a gasket is provided on the outer periphery of the thrust plate 63 to isolate it from the outside. Meanwhile, the thrust disc 63 is in clearance fit with the motor rotor 2 and is fixed to the rear end of the motor rotor 2 by bolts. A first air chamber 66 is formed between the thrust disc 63 and the gland 65 of the present embodiment.
The front end cover (41) and the rear end cover (42) are provided with radial air passages 45, the air inlet 43 is communicated with the axial air passages 44, the two ends of the axial air passages 44 are respectively communicated with the radial air passages 45 at the two sides, the radial air passages 45 extend to the bidirectional air bearing 51 and the rear end cover 42, and the radial air passages 45 of the rear end cover 42 are also communicated with the first air cavity 66.
The mechanism mainly pushes the thrust disc 63 forward through the first air cavity 66, so that the motor rotor 2 is prevented from moving forward.
To further illustrate the application of the present invention, the motor of this embodiment is exemplified as a driving device of a centrifugal machine plus a turbine, and the front end of the motor rotor 2 protrudes outside the motor housing 4 and is keyed with a scroll booster wheel 71. The motor housing 4 and the scroll boost impeller 71 are separated by a centrifuge front cover 72. A peripheral scroll 73 of the scroll-supercharging impeller 71.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.
Claims (5)
1. A unidirectional rotation permanent magnet high-speed motor comprises a motor rotor, a motor stator, a motor shell, a front bearing mechanism, a rear bearing mechanism and an axial thrust mechanism; the motor stator is fixed in the motor shell; the motor rotor is also positioned in the motor shell and penetrates through the motor stator; the front end and the rear end of the motor rotor are respectively supported on the motor shell through a front bearing mechanism and a rear bearing mechanism; the axial thrust mechanism is sleeved at the rear end of the motor rotor and is fixed at the rear end of the motor shell; the motor rotor is a permanent magnet motor rotor; the motor shell is provided with an air passage which extends to the front bearing mechanism, the rear bearing mechanism and the axial thrust mechanism; The method is characterized in that: the front bearing mechanism and the rear bearing mechanism are provided with at least one circle of radial throttle holes and at least one circle of deflection throttle holes, the radial throttle holes of the same circle are uniformly distributed around the central shaft of the motor rotor, the deflection throttle holes of the same circle are also uniformly distributed around the central shaft of the motor rotor, the radial throttle holes are arranged along the radial direction of the motor rotor, the deflection throttle holes and the diameter of the motor rotor have a deflection angle, the deflection direction of the deflection angle is the rotation direction of the motor rotor, the motor rotor consists of a magnetic steel, two aluminum blocks, a front motor shaft assembly, a rear motor shaft assembly and a coupling sleeve, the two aluminum blocks are symmetrically arranged on two sides of the magnetic steel, the front motor shaft assembly and the rear motor shaft assembly are respectively connected with the end surfaces of the two aluminum blocks in a clamping manner, The magnetic steel, the aluminum block, the front end of the front motor shaft assembly and the rear end of the rear motor shaft assembly are sleeved in the coupling sleeve and are in interference fit with the coupling sleeve, the front motor shaft assembly and the rear motor shaft assembly are provided with radially outwards protruding stop steps, and the axial thrust mechanism comprises a thrust disc cover, a front end face nozzle seat, a thrust disc, a rear end face nozzle seat and a gland which are arranged from front to back; The front end face and the rear end face of the nozzle seat are provided with vent holes axially; a first air cavity is formed between the front end face nozzle seat and the thrust disc cover, and a radial air passage of the rear end cover is communicated with the first air cavity; the rear end face nozzle seat and the gland are also provided with a second air cavity which is communicated with the outside; the thrust disc is fixed at the rear end of the motor rotor, and the motor shell comprises a cooling sleeve, a shell, a front end cover and a rear end cover; the cooling sleeve is nested in the shell, and two ends of the cooling sleeve are respectively connected with the front end cover and the rear end cover; the front bearing mechanism and the rear bearing mechanism are respectively arranged on the front end cover and the rear end cover; the hollow part of the shell is a large-diameter section, a conical section and a small-diameter section, and the large-diameter section and the small-diameter section are in transition through the conical section; One end of the cooling sleeve is nested in the small-diameter section, and the rest part is limited to the large-diameter section and the conical section; the outer side of the side wall of the cooling sleeve is integrally formed with a spiral rib which is used for separating the space between the cooling sleeve and the shell into a spiral circulating water channel; the side wall of the shell is provided with a liquid inlet pipe and a liquid outlet pipe which are axially arranged, the inner side of the side wall of the shell is provided with a liquid inlet through hole and a liquid outlet through hole, the outer side of the outer side wall is provided with a liquid inlet and a liquid outlet, the liquid inlet through hole and the liquid inlet are communicated with the liquid inlet pipe, the liquid outlet through hole and the liquid outlet through hole are communicated with the liquid outlet pipe, and the liquid inlet through hole and the liquid outlet through hole are respectively communicated with two ends of the circulating water channel; the outer side wall of the shell is also provided with an air inlet, the side wall of the shell is provided with axial air passages in a penetrating way, the front end cover and the rear end cover are provided with radial air passages, the air inlet is communicated to the axial air passages, two ends of the axial air passages are respectively communicated with the radial air passages on two sides, and the radial air passages extend to the periphery of the bidirectional air bearing, the radial bearing and/or the deflection bearing.
2. The unidirectional rotating permanent magnet high speed motor of claim 1, wherein: the front bearing mechanism and the rear bearing mechanism both adopt bidirectional air bearings, and at least one circle of deflection throttle holes and at least one circle of radial throttle holes are distributed on the bidirectional air bearings along the axial direction.
3. The unidirectional rotating permanent magnet high speed motor of claim 2, wherein: the bidirectional air bearing comprises two circles of deflection orifices and one circle of radial orifices, and the radial orifices are positioned in the middle of the two circles of deflection orifices.
4. The unidirectional rotating permanent magnet high speed motor of claim 1, wherein: the front bearing mechanism and the rear bearing mechanism are composed of a radial bearing and a deflection bearing, wherein the radial bearing is provided with at least one circle of radial throttle holes, and the deflection bearing is provided with at least one circle of deflection throttle holes.
5. The unidirectional rotating permanent magnet high speed motor of claim 2, wherein: 3-12 deflection orifices are distributed on one circle of deflection orifices, and the deflection angle is 30-60 degrees; 3-12 radial orifices are distributed in one circle of radial orifices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576017.6A CN109660057B (en) | 2018-12-22 | 2018-12-22 | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576017.6A CN109660057B (en) | 2018-12-22 | 2018-12-22 | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109660057A CN109660057A (en) | 2019-04-19 |
| CN109660057B true CN109660057B (en) | 2024-07-12 |
Family
ID=66115776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811576017.6A Active CN109660057B (en) | 2018-12-22 | 2018-12-22 | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109660057B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932465A (en) * | 2019-12-10 | 2020-03-27 | 无锡市源昌机械制造有限公司 | High-speed motor |
| CN114992245B (en) * | 2022-07-12 | 2024-05-07 | 安徽润安思变能源技术有限公司 | Static pressure gas radial bearing and installation equipment thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223007A (en) * | 2011-06-24 | 2011-10-19 | 罗立峰 | High-speed permanent magnet motor/generator |
| CN104411988A (en) * | 2012-06-18 | 2015-03-11 | Ntn株式会社 | Fluid dynamic bearing device and motor with same |
| CN207093581U (en) * | 2017-08-21 | 2018-03-13 | 中车株洲电机有限公司 | High-speed blower supports the solid box-like rotor of set of permanent magnets with foil air bearing |
| CN209805569U (en) * | 2018-12-22 | 2019-12-17 | 泉州鑫鸿海机械设备有限公司 | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1136710B1 (en) * | 1999-09-03 | 2009-07-22 | Sumitomo Electric Industries, Ltd. | Dynamic pressure bearing |
| CN101786256B (en) * | 2009-11-20 | 2012-03-07 | 无锡机床股份有限公司 | Improved grinding wheel spindle using air bearing |
| CN105888818B (en) * | 2015-05-19 | 2019-01-04 | 罗立峰 | A kind of super high speed electric power generating turbine supercharging device |
| CN105515261B (en) * | 2015-12-14 | 2018-03-27 | 湖北工业大学 | A kind of high-speed electric expreess locomotive air-bearing support meanss |
-
2018
- 2018-12-22 CN CN201811576017.6A patent/CN109660057B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223007A (en) * | 2011-06-24 | 2011-10-19 | 罗立峰 | High-speed permanent magnet motor/generator |
| CN104411988A (en) * | 2012-06-18 | 2015-03-11 | Ntn株式会社 | Fluid dynamic bearing device and motor with same |
| CN207093581U (en) * | 2017-08-21 | 2018-03-13 | 中车株洲电机有限公司 | High-speed blower supports the solid box-like rotor of set of permanent magnets with foil air bearing |
| CN209805569U (en) * | 2018-12-22 | 2019-12-17 | 泉州鑫鸿海机械设备有限公司 | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109660057A (en) | 2019-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109660057B (en) | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof | |
| WO2021244023A1 (en) | Air bearing spindle and machine tool | |
| CN112628161A (en) | Air-cooled compressor | |
| CN112211831A (en) | Air suspension high-speed centrifugal compressor | |
| CN108999793A (en) | A kind of centrifugal compressor | |
| CN108050157A (en) | A kind of magnetic liquid dual suspension supports Disjunction type cone bearing | |
| CN207500161U (en) | A kind of shaftless wind turbine of wheel rim drive-type | |
| CN114165464A (en) | Air compressor and fuel cell system | |
| CN106968972B (en) | Air suspension bearing blower and air suspension bearing pressurization method | |
| CN110714985A (en) | Microminiature air bearing system with middle air supply | |
| CN209805569U (en) | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof | |
| CN102886534A (en) | High-speed and high-rigidity dynamic and static pressure built-in electric main shaft | |
| CN214577793U (en) | Air-cooled compressor | |
| CN211266681U (en) | Forced cooling type solid rotor motor | |
| CN108050158A (en) | A kind of magnetic liquid dual suspension supports cone bearing | |
| CN209340202U (en) | Shaft seal part, compressor and refrigerant circulating system | |
| CN209523914U (en) | Bearing part, compressor and refrigerant circulating system | |
| WO2020134518A1 (en) | Bearing carrying component, compressor and refrigerant circulation system | |
| CN116792328A (en) | Built-in water-cooling and air-cooling single-stage high-speed centrifugal air compressor | |
| CN108612754A (en) | A kind of passive-type magnetic liquid dual suspension Disjunction type cone bearing | |
| CN216343036U (en) | Magnetic suspension hydrogen circulating pump | |
| CN108980207A (en) | A kind of magnetism dual suspension Disjunction type cone bearing with porous media | |
| CN210451007U (en) | Ultra-precise liquid dynamic and static piezoelectric main shaft | |
| CN113404706A (en) | Self-cooled air suspension air-blower | |
| CN210451818U (en) | Electric spindle pipeline layout system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 362000 Industrial Launch Zone, Xingdong Area, Dongyuan Town, Quanzhou Taiwan Business Investment Zone, Quanzhou City, Fujian Province Applicant after: TOPCO (China) Co.,Ltd. Address before: 362000 Tangtou Village, Luoyang Town, Taiwan Merchants Investment Zone, Quanzhou City, Fujian Province (production site: Xingdong Industrial Launch Zone, Dongyuan Town, Quanzhou Taiwan Merchants Investment Zone) Applicant before: QUANZHOU XINHONGHAI MACHINERY EQUIPMENT Co.,Ltd. Country or region before: China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant |