CN113894300A - Porous and micropore combined throttling gas static pressure turning electric spindle - Google Patents
Porous and micropore combined throttling gas static pressure turning electric spindle Download PDFInfo
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- CN113894300A CN113894300A CN202111248164.2A CN202111248164A CN113894300A CN 113894300 A CN113894300 A CN 113894300A CN 202111248164 A CN202111248164 A CN 202111248164A CN 113894300 A CN113894300 A CN 113894300A
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- 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
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- 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
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- 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
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/04—Work clamping means using fluid means or a vacuum
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- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a porous and micropore combined throttling gas static pressure turning electric spindle, which comprises an air floatation supporting component; the air floatation supporting assembly comprises a rotating shaft, wherein a rotating shaft axial supporting section, a rotating shaft radial first supporting section and a rotating shaft radial second supporting section are sequentially arranged on the rotating shaft along the direction from one end to the other end of the rotating shaft, axial throttles are arranged on two sides of the rotating shaft axial supporting section, and radial throttles are arranged on the rotating shaft radial first supporting section and the rotating shaft radial second supporting section; the outer side of the axial throttler is provided with a plurality of annular air supply grooves along the radial direction along the outer sides of the axial throttler and the radial throttler, at least one air supply groove is internally provided with a plurality of transitional air supply holes, and throttling micropores are arranged in the transitional air supply holes. The scheme can enable the supporting air film to obtain larger bearing capacity and rigidity and improve the static and dynamic characteristics of the turning spindle through the combined throttling function of the inherent tiny holes of the porous material and the additionally arranged throttling micropores.
Description
Technical Field
The invention relates to the technical field of precision cutting machining, in particular to a porous and micropore combined throttling gas static pressure turning electric spindle.
Background
The gas hydrostatic bearing is lubricated and supported by a gas film formed in a clearance of a rotating pair by external pressurized gas, and has the advantages of high motion precision, high rotating speed, low operation power consumption, low heat productivity, long service life and the like due to the low viscosity characteristic of the gas and the homogenization effect of the gas film on the manufacturing error of the surface of the rotating pair bearing. In order to bear the part to perform rotary motion and resist dynamic cutting force in the machining process, the aerostatic spindle of the ultra-precision lathe needs to have sufficient bearing capacity and rigidity. The throttling of external pressurized gas is a key link for obtaining bearing capacity and rigidity of the aerostatic bearing, and common throttling modes include small-hole throttling, gap throttling, ring surface throttling, porous throttling and the like, wherein the small-hole throttling and the porous throttling are the main throttling modes of the aerostatic spindle of the ultra-precision lathe at present.
The small-hole throttling gas hydrostatic bearing has the characteristics of complete design theory, simple structure, mature manufacturing and assembling process and the like, and is widely applied to ultra-precision lathes. However, the small-hole throttling aerostatic bearing generally has the problems of small bearing capacity and low rigidity, and is not suitable for processing large-mass parts. Although the bearing capacity and rigidity of the small-hole throttling aerostatic bearing can be improved by arranging the pressure equalizing cavity, the cyclone formed in the pressure equalizing cavity aggravates the micro-vibration of the bearing, the air hammer vibration is easy to occur, the stability is poor, the capability of resisting dynamic cutting force is weak, and the further improvement of the machining precision of the ultra-precision lathe is limited.
The porous throttling aerostatic bearing adopts porous materials with a large number of tiny holes for throttling, and the whole shaft sleeve can be made of porous materials, so that the flow field of the supporting surface is more uniform, the characteristics of bearing capacity, rigidity, stability and the like under the same size condition can be better than those of the porous throttling aerostatic bearing, and the porous throttling aerostatic bearing has wider application range and better development prospect in the technical field of ultraprecise processing. However, the pore diameter of the micro-pores in the existing porous material is very small, the pore diameter is generally several microns or even smaller, the permeability of the material is relatively small, the flow resistance is relatively large, and the bearing has relatively small bearing capacity and relatively low rigidity. In addition, the distribution of the tiny pores in the porous material is disordered, the flow channel is irregular in bending, the flow of the pressurized gas is long, and the response of the bearing to the dynamic load is slow. In addition, the tiny pores of the porous material are easy to block in the material processing and bearing operation processes, so that the rigidity of the porous throttling gas static pressure main shaft is reduced, even the locking phenomenon occurs, and the reliability of the ultra-precision lathe is influenced.
Disclosure of Invention
The invention aims to solve the technical problem that an ultra-precision lathe gas static pressure main shaft needs enough bearing capacity and rigidity, and aims to provide a porous and micropore combined throttling gas static pressure turning electric main shaft.
The invention is realized by the following technical scheme:
a porous and micropore combined throttling gas static pressure turning electric spindle comprises an air floatation supporting component;
the air floatation supporting assembly comprises a rotating shaft, wherein a rotating shaft axial supporting section, a rotating shaft radial first supporting section and a rotating shaft radial second supporting section are sequentially arranged on the rotating shaft along the direction from one end to the other end of the rotating shaft, axial throttles are arranged on two sides of the rotating shaft axial supporting section to form a left axial supporting air film and a right axial supporting air film, and radial throttles are arranged on the rotating shaft radial first supporting section and the rotating shaft radial second supporting section to form a radial first supporting air film and a radial second supporting air film;
the outside of axial flow controller all is equipped with many annular air feed grooves, at least one along axial, radial flow controller's the outside is equipped with a plurality of transition air feed holes in the air feed groove, be equipped with the throttle micropore in the transition air feed hole, the throttle micropore and the inboard intercommunication of axial flow controller, the throttle micropore and the inboard intercommunication of radial flow controller.
Compared with the prior art, the static and dynamic characteristics of the small-hole throttling or porous throttling aerostatic bearing are poor, and the further improvement of the processing precision of an ultra-precision machine tool is limited; after static pressure gas is introduced, a left axial supporting air film and a right axial supporting air film are distributed on the left side and the right side of the axial supporting section of the rotating shaft and used for limiting the axial movement of the rotating shaft; and after static pressure gas is introduced, a radial first supporting gas film and a radial second supporting gas film are respectively formed between the radial first supporting section and the radial second supporting section of the rotating shaft and the radial restrictor and are used for limiting the radial runout of the rotating shaft.
Further optimize, radial flow controller inboard is equipped with many annular radial flow controller air discharge ducts, adjacent two along self length direction region between the radial flow controller air discharge duct is radial flow controller bearing surface, the radial flow controller outside that radial flow controller bearing surface corresponds is equipped with a plurality of radial flow controller air feed grooves, every along the axial equipartition a plurality of radial flow controller air feed grooves that radial flow controller bearing surface corresponds communicate each other, and in a plurality of radial flow controller air feed grooves that correspond, are equipped with a plurality of radial flow controller transition air feed holes in at least one radial flow controller air feed groove.
Further preferably, the air floatation supporting assembly further comprises a thrust plate, a backing ring and a base which are sequentially sleeved along the direction from one end of the rotating shaft to the other end of the rotating shaft, the backing ring is sleeved at the outer end of the axial supporting section of the rotating shaft, a limiting boss is arranged in the middle of the inner side of the base, and the two radial throttlers are located on two sides of the limiting boss; two the axial flow controller is located respectively between base tip and pivot axial supporting section one side, between thrust plate and the pivot axial supporting section opposite side, be equipped with the passageway of intercommunication each other between thrust plate, backing ring and the base for left axial supporting air film, right axial supporting air film, radial first supporting air film and radial second supporting air film air feed.
Further optimizing, a gap is reserved between the backing ring and the axial supporting section of the rotating shaft, a backing ring exhaust hole is formed in the backing ring, and the backing ring exhaust hole is communicated with the outer side of the left axial supporting air film and the outer side of the right axial supporting air film through the gap; the gas discharge device is used for discharging gas outside the left axial supporting gas film and outside the right axial supporting gas film.
Preferably, the air-flotation supporting assembly further comprises a chip blocking plate matched with one end of the thrust plate, the thrust plate is located between the chip blocking plate and the backing ring, a cylindrical chip blocking plate sealing boss is arranged in the middle of one end, close to the thrust plate, of the chip blocking plate, the chip blocking plate sealing boss is in sealing connection with the inner side of the rotating shaft, and a clearance air-tight labyrinth is formed by the connection between the chip blocking plate and the thrust plate; and is used for preventing impurities such as cutting cooling liquid, cutting chips, dust and the like from entering the interior of the bearing.
Further optimize, be equipped with the pivot hole of running through on the pivot axial supporting section, still be equipped with the first transition section of exhausting of pivot in the pivot, the first transition section of exhausting of pivot is located between pivot axial supporting section and the radial first supporting section of pivot, leave the clearance between first transition section of exhausting of pivot and the base, the gas that the clearance flowed out is passed through on the inboard and radial first supporting gas membrane left side of right side axial supporting gas membrane, and accessible pivot hole of exhausting passes through with the inboard gas that flows of left axial supporting gas membrane together behind the hole the airtight labyrinth is discharged.
Further optimization, the device also comprises a driving assembly; the driving assembly comprises a rotor mounting shaft, the rotor mounting shaft is connected with the other end of the rotating shaft and coaxially arranged, a motor rotor is sleeved on the outer side of the rotor mounting shaft, a motor stator is sleeved on the outer side of the motor rotor, a stator mounting piece is sleeved outside the motor stator and fixed at the end part of the base, and a cooling sleeve is mounted on the stator mounting piece and used for circulating cooling fluid; the motor stator pressing plate is used for pressing the motor stator, and the rotor pressing plate is used for pressing the motor rotor; the device also comprises a grid mounting shaft fixed at one end of the rotor pressing plate, which is far away from the rotating shaft, wherein a circular grating ruler and a circular magnetic grid ruler are sleeved on the grid mounting shaft in a staggered manner along the axial direction; the circular grating ruler is provided with a grating reading head, the grating reading head is used for measuring the angular position of the spindle, and an external spindle controller can control the motor to drive the rotating part of the air-bearing support assembly to rotate to a specified position according to an input position instruction; the circular magnetic grid ruler is provided with a magnetic grid reading head, the magnetic grid reading head is used for measuring the rotating speed of the spindle, and an external spindle controller can control the motor to drive the rotating part of the air-bearing support assembly to rotate at a specified rotating speed according to an input speed instruction.
Further preferably, the driving assembly further comprises a protective sleeve positioned at one end of the grid mounting shaft, which is far away from the rotating shaft, the circumferential end part of the protective sleeve is fixed on the stator pressing plate, and the protective sleeve is provided with an exhaust hole;
the rotating shaft is also provided with a second rotating shaft exhaust transition section and a second rotating shaft switching section, the second rotating shaft exhaust transition section is positioned between the first rotating shaft radial support section and the second rotating shaft radial support section, a gap is reserved between the second rotating shaft switching section and the rotor mounting shaft, a gap is reserved between the second rotating shaft radial support section and the rotor mounting shaft, the base is provided with an exhaust channel, the radial first support gas film is used for removing gas flowing out from the left side, and the rest gas and the gas flowing out from the radial second support gas film are exhausted into a radial gap between the motor stator and the motor rotor through an exhaust groove on the radial restrictor, an exhaust channel of the base and the gap on the second rotating shaft exhaust transition section and the second rotating shaft switching section and are finally exhausted from an exhaust hole on the protective sleeve; the gas flowing through the radial gap between the motor stator and the motor rotor has a cooling effect on the motor.
Further optimize, pivot, active cell installation axle, active cell clamp plate and bars installation axle are coaxial to be set up, and the middle part is equipped with the through-hole that runs through in proper order, protective sleeve middle part is equipped with the vacuum adapter, the vacuum adapter stretches into bars installation inboard side and clearance air-tight connection, pivot one end still is equipped with the sucking disc, the sucking disc is used for the clamping part.
Further optimize, the one end surface that the pivot was kept away from to the sucking disc is equipped with a plurality of sucking disc air exhaust grooves along radial equipartition, still be equipped with the radial air vent of sucking disc on the sucking disc, the sucking disc middle part is equipped with sucking disc axial air vent, sucking disc radial air vent one end communicates in the external world, other end and sucking disc axial air vent intercommunication, the sucking disc is pumped and is equipped with the sucking disc aspirating hole in the groove, sucking disc radial air vent and sucking disc aspirating hole intercommunication, the drill way department of the radial air vent of sucking disc has set gradually counter bore and screw thread from outside to inside for the screw joint gas blocking pole. The air blocking rod is sequentially provided with a thread section and a groove sealing section, the groove sealing section is provided with a groove for mounting a sealing ring, and the groove is used for enabling a sucker axial vent hole on the outer side of the sealing ring to be not communicated with a sucker radial vent hole and enabling a sucker axial vent hole on the inner side of the sealing ring to be communicated with the sucker radial vent hole; wherein, the installation sealing washer can adsorb the part that has different diameters on the sucking disc on the different slot of slot seal section, realizes the clamping of different diameter parts.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the porous and micropore combined throttling mode provided by the invention utilizes the inherent tiny pores with the diameter of several microns of the porous material and the throttling micropores with the diameter of tens of microns formed in addition to carry out combined throttling on the pressurized gas, so that the flow resistance of the porous throttling device can be reduced, and the bearing capacity and the rigidity of the bearing can be improved.
2. Different from disordered distribution of micro pores in the porous material, the distribution of the throttling micropores is more regular, the flow passing through the throttling micropores is shorter, the response speed of the bearing to dynamic load can be accelerated, the self-excited vibration is reduced, and the stability of the bearing is improved.
3. The diameter of the throttling micropores is one order of magnitude larger than that of the micro-pores in the porous material, so that the blocking risk of the throttling device in the processing and bearing running processes can be reduced, and the reliability of the ultra-precision lathe can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is an axially sectioned view of a portion of an exploded view of the present invention;
FIG. 2 is a cross-sectional view of a section of the present invention including a gas supply flow passage;
FIG. 3 is a cross-sectional view of a cross-section of the exhaust-containing flow path of the present invention;
FIG. 4 is an isometric cross-sectional view of a base of the present invention;
FIG. 5 is a cross-sectional axial view of a thrust plate of the present invention;
FIG. 6 is an axial cross-sectional view of a chip guard of the present invention;
FIG. 7 is an isometric cross-sectional view of the suction cup of the present invention;
FIG. 8 is a cross-sectional view of a spindle according to the present invention;
FIG. 9 is a schematic three-dimensional structure of the air blocking rod of the present invention;
FIG. 10 is an axial cross-sectional view of the axial restrictor of the present invention and a partial enlarged view thereof;
FIG. 11 is an axial cross-sectional view of the radial restrictor of the present invention and a partial enlarged view thereof;
FIG. 12 is an axial cross-sectional view of the stator mount of the present invention;
figure 13 is an isometric cross-sectional view of a vacuum adapter of the present invention;
FIG. 14 is an axial cross-sectional view of the grid mounting shaft of the present invention;
fig. 15 is an axial sectional view of a mover mounting shaft of the present invention.
Reference numbers and corresponding part names in the drawings:
1. an air supporting assembly, 2, a driving assembly, 101, a base, 102, a backing ring, 103, a thrust plate, 104, a chip blocking plate, 105, a sucker, 106, a filter plug, 107, a rotating shaft, 108, an air blocking rod, 109, an axial restrictor, 110, a radial restrictor, 201, a stator mounting part, 202, a cooling sleeve, 203, a stator pressing plate, 204, a protective sleeve, 205, a grating reading head mounting plate, 206, a grating reading head, 207, a circular grating ruler, 208, a vacuum adapter, 209, a gap sealing cylindrical ring, 210, a magnetic grating pressing plate, 211, a circular grating ruler, 212, a magnetic grating reading head, 213, a magnetic grating mounting plate, 214, a grating mounting shaft, 215, a rotor pressing plate, 216, a rotor, a mounting shaft, a motor stator, 218, a motor rotor, 10101, a limiting boss, 10102, a base air inlet hole, 10103, a base radial first air vent hole, 10104, a base axial first air vent hole, 10105, a base radial second air vent hole, 10106. 10107, a radial fourth vent hole of the base, 10108, a radial fifth vent hole of the base, 10109, a radial sixth vent hole of the base, 10110, a radial second vent hole of the base, 10111, an axial air supply groove of the base, 10112, a mounting groove of the axial restrictor of the base, 10113, a radial first vent hole of the base, 10114, a radial second vent hole of the base, 10115, a radial third vent hole of the base, 10116, a radial fourth vent hole of the base, 10117, a radial fifth vent hole of the base, 10118, an axial vent hole of the base, 10201, a cushion ring vent hole, 10202, a cushion ring vent hole, 10301, a axial first vent hole of the thrust plate, 10302, a radial vent hole of the thrust plate, 10303, an axial second vent hole of the thrust plate, 10304, an axial air supply groove of the thrust plate, 10305, an axial mounting groove of the thrust plate, 10306, a first annular boss of the thrust plate, 10307, a second annular boss of the thrust plate, 10401, a second annular boss of the thrust plate, a sixth vent hole of the base, a second exhaust hole of the thrust plate, 10110, a third exhaust hole of the thrust plate, a radial exhaust hole of the thrust plate of the thrust, Chip baffle plate sealing boss, 10402, first chip baffle groove, 10403, second chip baffle groove, 10404, chip baffle plate air extraction hole, 10405, filter plug mounting hole, 10406, chip baffle plate air extraction hole, 10501, sucker sealing boss, 10502, sucker axial vent hole, 10503, sucker radial vent hole, 10504, sucker air extraction hole, 10505, sucker air extraction groove, 10701, rotating shaft first transition section, 10702, rotating shaft axial bearing section, 10703, rotating shaft first exhaust transition section, 10704, rotating shaft radial first bearing section, 10705, rotating shaft second exhaust transition section, 10706, rotating shaft radial second bearing section, 10707, rotating shaft second transition section, 10708, rotating shaft air extraction hole, 10709, rotating shaft exhaust hole, 10801, inner hexagonal cylinder section, 10802, thread section, 10803, groove sealing section, 10901, axial restrictor groove, air supply transition hole, 10902, axial restrictor transition gas supply hole, 10903, axial throttling micropore, 11001, radial exhaust groove, 11002. a radial restrictor bearing surface, 11003, a radial restrictor air supply groove, 11004, a radial restrictor transitional air supply hole, 11005, a radial restrictor throttling micropore, 11006, a radial restrictor exhaust hole, 20101, a stator mounting part switching section, 20102, a stator mounting part sleeve section, 20103, a stator mounting part first step, 20104, a stator mounting part second step, 20801, a connector mounting section, 20802, a connector transition section, 20803, a connector sealing section, 20804, a connector exhaust hole, 21401, a grid mounting shaft sealing boss, 21402, a grating limiting section, 21403, a grating sleeving section, 21404, a magnetic grid limiting section, 21405, a magnetic grid sleeving section, 21406, a magnetic grid pressing plate sleeving section, 21407, a grid mounting shaft exhaust hole, 21601, a rotor mounting shaft sealing boss, 21602, a rotor mounting shaft limiting section, 21603, a rotor mounting shaft switching section, 21604, and a rotor mounting shaft exhaust hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
The present embodiment will explain the porous and micro-porous combined throttling aerostatic turning electric spindle of the present invention in detail with reference to fig. 1 to 15.
The porous and micropore combined throttling aerostatic turning motorized spindle comprises an air floatation supporting assembly 1 and a driving assembly 2, wherein the left side drawing in figure 1 is a structural schematic diagram of the air floatation supporting assembly 1, and the right side drawing in figure 1 is a structural schematic diagram of the driving assembly 2; the air supporting assembly 1 comprises a base 101, a backing ring 102, a thrust plate 103, a chip blocking plate 104, a suction cup 105, a filter plug 106, a rotating shaft 107, 2 air blocking rods 108, 2 axial throttlers 109 and 2 radial throttlers 110, and the driving assembly 2 comprises a stator mounting piece 201, a cooling sleeve 202, a stator pressing plate 203, a protective sleeve 204, a grating reading head mounting plate 205, a grating reading head 206, a circular grating ruler 207, a vacuum adapter 208, a gap sealing cylindrical ring 209, a magnetic grating pressing plate 210, a circular magnetic grating ruler 211, a magnetic grating reading head 212, a magnetic grating mounting plate 213, a grating mounting shaft 214, a rotor pressing plate 215, a rotor mounting shaft 216, a motor stator 217 and a motor rotor 218.
The base 101 is a cuboid with rectangular weight-reducing grooves formed in the other four surfaces of a through inner hole in the length direction, and the backing ring 102, the thrust plate 103, the axial restrictor 109 and the radial restrictor 110 are of annular structures with through inner holes. The base 101 runs through the hole and leans on intermediate position department to be provided with spacing boss 10101, and 2 radial throttles 110 pass through viscose or interference fit and install in the base 101 hole and lie in the both sides of spacing boss 10101, and 2 radial throttles 110's hole diameter is the same to be less than the millimeter magnitude of spacing boss 10101 hole diameter. The gasket ring 102 is installed on a circular boss on the outer edge of the left side of the base 101 through a screw, the thrust plate 103 is installed on the left side surface of the gasket ring 102 through a circular boss on the outer edge of the right side, a base axial restrictor installation groove 10112 for installing the axial restrictor 109 is arranged on the inner side of the circular boss on the outer edge of the left side of the base 101, a thrust plate axial restrictor installation groove 10305 for installing the axial restrictor 109 is arranged on the inner side of the circular boss on the outer edge of the right side of the thrust plate 103, 2 axial restrictors 109 are respectively installed in the base axial restrictor installation groove 10112 and the thrust plate axial restrictor installation groove 10305 through viscose glue or interference fit, the surface of the circular boss on the outer edge of the left side of the base 101 and the surface of the axial restrictor 109 installed on the inner side of the base 101 are in the same plane, and the surface of the circular boss on the outer edge of the right side of the thrust plate 103 and the surface of the axial restrictor 109 installed on the inner side of the thrust plate are in the same plane; the backing ring 102, the thrust plate 103, the 2 axial throttles 109 and the 2 radial throttles 110 are coaxial with the axis of the base 101 penetrating the inner hole, and form a fixed part of the air floatation support assembly 1.
The rotating shaft 107 consists of 7 sections, namely a rotating shaft first switching section 10701, a rotating shaft axial supporting section 10702, a rotating shaft first exhaust transition section 10703, a rotating shaft radial first supporting section 10704, a rotating shaft second exhaust transition section 10705, a rotating shaft radial second supporting section 10706 and a rotating shaft second switching section 10707 from left to right in sequence; the outer diameter of the rotating shaft axial supporting section 10702 is the same as that of the axial throttler 109 and is arranged among the 2 axial throttlers 109, the outer diameters of the rotating shaft radial first supporting section 10704 and the rotating shaft radial second supporting section 10706 are the same, the lengths of the rotating shaft radial first supporting section 10704 and the rotating shaft radial second supporting section 10706 are the same as that of the radial throttler 110, and the rotating shaft axial supporting section 10702 and the rotating shaft radial second supporting section 10706 are respectively sleeved in inner holes of the 2 radial throttlers 110. A through rotating shaft air exhaust hole 10708 is axially formed in the rotating shaft 107, a cylindrical chip baffle sealing boss 10401 is arranged in the middle position of the right side of the chip baffle 104 and is sleeved in the rotating shaft air exhaust hole 10708, a groove for installing a sealing ring is formed in the outer cylindrical surface of the chip baffle sealing boss 10401, a first chip baffle groove 10402 and a second chip baffle groove 10403 for forming a hermetic seal labyrinth are sequentially formed in the outer side of the chip baffle sealing boss 10401 in the right side of the chip baffle 104 from inside to outside, and the chip baffle 104 is in contact with the left side surface of the rotating shaft 107 through the circular ring surface between the chip baffle sealing boss 10401 and the first chip baffle groove 10402 and is fixed through screws; the center of the filing baffle 104 is sequentially provided with a filing baffle air exhaust hole 10406, a filter plug mounting hole 10405 and a filing baffle air exhaust hole 10404 from left to right, and the filter plug 106 is a cylindrical structure made of porous material with the functions of ventilation and dust prevention and is mounted in the filter plug mounting hole 10405 through viscose or interference fit. The sucking disc 105 right side center is provided with cylindrical sucking disc sealed boss 10501 to the cover is established in keeping off bits board exhaust hole 10406, is provided with the slot of installation sealing washer on the outer face of cylinder of sucking disc sealed boss 10501, and sucking disc 105 passes through the surface in the sucking disc sealed boss 10501 outside and keeps off bits board 104 left side surface contact, and passes through the fix with screw. The sucking disc 105 is provided with 2 sucking disc radial vent holes 10503 on the same diameter, the hole opening of the sucking disc radial vent hole 10503 is provided with a counter bore and a thread from outside to inside in sequence, and 2 gas blocking rods 108 are arranged in the sucking disc radial vent holes 10503 and fixed through the thread. The axes of the chip baffle 104, the suction cup 105, the filter plug 106 and the rotating shaft 107 are the same as the axis of the inner hole of the base 101, and form a rotating part of the air floating supporting assembly 1 together with the air blocking rod 108.
The stator mounting piece 201 is a tubular structure provided with a through hole and comprises a stator mounting piece switching section 20101 and a stator mounting piece sleeve section 20102, the left side face of the stator mounting piece switching section 20101 is in contact with a circular ring boss arranged on the right side of the base 101 and is fixedly connected through a screw, the outer diameter of the stator mounting piece sleeve section 20102 is smaller than that of the stator mounting piece switching section 20101, a cooling groove is formed in the outer cylindrical surface of the stator mounting piece sleeve section, and grooves for mounting sealing rings are formed in two sides of the cooling groove. The cooling sleeve 202 is sleeved outside the stator mounting part sleeve section 20102 and fixed with the stator mounting part switching section 20101 through screws, a cooling groove and 2 sealing rings on the inner cylindrical surface of the cooling sleeve 202 and the outer cylindrical surface of the stator mounting part switching section 20101 form a flowing space of cooling fluid of the motor stator 217, and 2 pipe joint mounting threaded holes are axially and uniformly formed in the middle corresponding positions of the cooling groove of the cooling sleeve 202 on the outer cylindrical surface of the stator mounting part switching section 20101.
A stator mounting piece first step 20103 and a stator mounting piece second step 20104 are sequentially arranged on the inner side of the stator mounting piece 201 from left to right, the motor stator 217 is formed by overlapping a plurality of silicon steel sheets to form a circular cylinder, coils are wound on the inner side of the circular cylinder, the motor stator 217 is arranged in the stator mounting piece 201, and the left side surface of the circular cylinder of the silicon steel sheets is in contact with the stator mounting piece first step 20103; a circular boss is arranged on the left side of the stator pressing plate 203, the right side surface of the silicon steel sheet circular cylinder of the motor stator 217 is in contact with the circular boss on the left side of the stator pressing plate 203 and is fixedly connected with the circular boss on the left side of the stator pressing plate 203 through a screw, and the stator pressing plate 203 is fixedly connected with the cooling sleeve 202 through a screw from the surface of the outer side of the circular boss on the left side of the stator pressing plate 203; the height of the circular column of the silicon steel sheet of the motor stator 217 is larger than the distance between the first step 20103 of the stator mounting part and the second step 20104 of the stator mounting part, and the circular column of the silicon steel sheet of the motor stator 217 is clamped between the first step 20103 of the stator mounting part and the circular boss on the left side of the stator pressing plate 203. The rotor mounting shaft 216 is composed of three sections, namely a rotor mounting shaft sealing boss 21601, a rotor mounting shaft limiting section 21602 and a rotor mounting shaft switching section 21603, the rotor mounting shaft sealing boss 21601 is sleeved in the rotating shaft air extraction hole 10708, and the left side surface of the rotor mounting shaft limiting section 21602 is in contact with the right side surface of the rotating shaft 107 and is fixedly connected with the rotating shaft through screws. The motor rotor 218 is sleeved outside the rotor mounting shaft adapter section 21603, the left side surface of the motor rotor is contacted with the right side surface of the rotor mounting shaft limiting section 21602, a rotor mounting shaft air exhaust hole 21603 is arranged in the middle of the rotor mounting shaft 216, a sealing boss is arranged on the left side of the rotor pressure plate 215, a groove for mounting a sealing ring is arranged on the outer cylindrical surface of the rotor pressure plate 215, the sealing boss on the left side of the rotor pressure plate 215 is sleeved in the rotor mounting shaft air exhaust hole 21603, the surface of the outer side of the sealing boss of the rotor pressure plate 215 is contacted with the right side surface of the motor rotor 218 and is fixedly connected with the motor rotor 218 through a screw, and the height of the motor rotor 218 is greater than that of the rotor mounting shaft adapter section 21603, so that the motor rotor 218 is clamped between the rotor mounting shaft limiting section 21602 and the rotor pressure plate 215.
The grid mounting shaft 214 is composed of 6 sections, which are a grid mounting shaft sealing boss 21401, a grid limiting section 21402, a grid sleeving section 21403, a magnetic grid limiting section 21404, a magnetic grid sleeving section 21405 and a magnetic grid pressing plate sleeving section 21406 in sequence from left to right, a groove for mounting a sealing ring is arranged on the outer cylindrical surface of the grid mounting shaft sealing boss 21401, the grid mounting shaft sealing boss 21401 is sleeved in an air suction hole arranged in the middle of the moving element pressing plate 215, and the grid mounting shaft 214 is in contact with the right side surface of the moving element pressing plate 215 through the left side surface of the grid limiting section 21402 and is fixedly connected through a screw; the diameters of the outer cylindrical surfaces of the grating limiting section 21402, the grating sleeving section 21403, the magnetic grating limiting section 21404, the magnetic grating sleeving section 21405 and the magnetic grating pressing plate sleeving section 21406 are sequentially reduced, the circular grating ruler 207 is sleeved outside the grating sleeving section 21403 and fixedly connected to the right side of the grating limiting section 21402 through screws, and the circular grating ruler 211 is sleeved outside the magnetic grating sleeving section 21405 and fixed on the grating mounting shaft 214 through the magnetic grating pressing plate 210. The grating reading head mounting plate 205 is fixed on the right side surface of the stator pressing plate 203, and the grating reading head 206 is fixed on the right side surface of the grating reading head mounting plate 205; the magnetic grid mounting plate 213 is Z-shaped and fixed on the right side surface of the stator pressing plate 203, and the magnetic grid reading head 212 is fixed on the right side surface of the magnetic grid mounting plate 213. The grating reading head 206 and the magnetic grating reading head 212 are respectively positioned on the right side of the stator pressing plate 203 and are arranged in a relative staggered manner, the grating reading head 206 and the circular grating ruler 207 are axially arranged in a centering manner, and the magnetic grating reading head 212 and the circular grating ruler 211 are axially arranged in a centering manner.
The protection sleeve 204 is a cylindrical structure with a through hole on the right side, and the left side of the protection sleeve is provided with a circular outer edge for installation and is fixedly installed on the right side of the stator pressing plate 203 through screws. The vacuum adapter 208 is a stepped cylinder consisting of a joint mounting section 20801, a joint transition section 20802 and a joint sealing section 208033, the diameters of the stepped cylinder are sequentially reduced from right to left, and the left side surface of the joint mounting section 20801 is in contact with the right side surface of the protective sleeve 204 and is fixed through screws. The clearance sealing cylindrical ring 209 is a cylindrical structure made of graphite materials with self-lubricating functions, is assembled on the outer cylindrical surface of the joint sealing section 20803 through viscose or interference and extends into the grid mounting shaft suction hole 21407, the outer diameter of the clearance sealing cylindrical ring 209 is smaller than the diameter of the grid mounting shaft suction hole 21407 by several microns to dozens of microns, and clearance air sealing is formed between the clearance sealing cylindrical ring 209 and the grid mounting shaft suction hole 21407. A penetrating connector air suction hole 20804 is formed in the middle of the vacuum adapter 208, and threads for installing a pipe connector are formed in the right end hole of the connector air suction hole 20804.
The axial lines of the stator mounting member 201, the cooling sleeve 202, the stator pressing plate 203, the protecting sleeve 204, the circular grating ruler 207, the vacuum adapter 208, the gap sealing cylindrical ring 209, the magnetic grating pressing plate 210, the circular grating ruler 211 and the motor stator 217 are the same as the axial line of the inner hole penetrating through the base 101. The axes of the grid mounting shaft 214, the mover pressing plate 215, the mover mounting shaft 216, and the motor mover 218 are the same as the axis of the rotary shaft 107.
The axial throttler 109 is a circular ring sheet-shaped structure, one side of the axial throttler is provided with 8 annular axial throttler air supply grooves 10901 which are distributed at equal intervals in the radial direction, a group of axial throttler transitional air supply holes 10902 with the diameter of millimeter magnitude are uniformly arranged in the 3 rd and 6 th axial throttler air supply grooves 10901 from inside to outside along the circumferential direction, and each axial throttler transitional air supply hole 10902 is internally provided with an axial throttler throttling micropore 10903 with the diameter of dozens of micrometers. The axial bearing section 10702 of the rotating shaft is thinner than the backing ring 102 by several micrometers to ten or more micrometers, and a left axial bearing air film and a right axial bearing air film are distributed on the left side and the right side of the axial bearing section 10702 of the rotating shaft after static pressure gas is introduced, so that the axial movement of the rotating shaft 107 is limited.
The radial restrictor 110 is a cylindrical sheet structure, 2 radial restrictor exhaust grooves 11001 which are equally divided into 3 sections are respectively arranged on the inner surface and the outer surface, wherein the inner surface is divided into 3 identical radial restrictor supporting surfaces 11002, 5 radial restrictor air supply grooves 11003 are uniformly distributed on the cylindrical outer surface corresponding to each radial restrictor supporting surface 11002 along the axial direction, 5 radial restrictor air supply grooves 11003 corresponding to each radial restrictor supporting surface 11002 are partially communicated by eliminating the outer edge of the radial restrictor air supply grooves 11003, a group of radial restrictor transitional air supply holes 11004 with the diameter of millimeter magnitude are uniformly arranged on the radial restrictor air supply grooves 11003 corresponding to the middle position of each radial restrictor supporting surface 11002 along the circumferential direction, and radial restrictor transitional air supply holes 11005 with the diameter of tens of micrometers are arranged in each radial transitional air supply hole 11004. The diameters of the first radial support section 10704 and the second radial support section 10706 of the rotating shaft are smaller than the inner diameter of the radial restrictor 110 by several micrometers to ten and several micrometers, and a first radial support gas film and a second radial support gas film are respectively formed between the first radial support section 10704 and the second radial support section 10706 of the rotating shaft and the radial restrictor 110 after the static pressure gas is introduced, so as to limit the radial runout of the rotating shaft. The radial first support air film and the radial second support air film are divided into 3 sections by the radial restrictor exhaust groove 11001, respectively.
And communicated flow passages are arranged in the base 101, the backing ring 102 and the thrust plate 103 to supply air to the left axial supporting air film, the right axial supporting air film, the radial first supporting air film and the radial second supporting air film. The base is provided with a first radial vent hole 10103, a second radial vent hole 10105, a third radial vent hole 10106, a fourth radial vent hole 10107, a fifth radial vent hole 10108 and a sixth radial vent hole 10109 which are communicated with the first axial vent hole 10104, and are axially and centrally arranged with a radial restrictor air supply groove 11003 in which the axial restrictor transition air supply holes 10902 on the 2 radial restrictors 110 are located, the first radial vent hole 10103 of the base is communicated with the base air inlet hole 10102, the hole of the base air inlet hole 10102 is provided with threads for installing a pipe joint, the first radial vent hole 10103 of the base, the second radial vent hole 10105 of the base, the third radial vent hole 10106 of the base, the fourth radial vent hole 10107 of the base, the fifth radial vent hole 10108 of the base, and the hole of the sixth radial vent hole 10109 of the base is provided with threads for installing a plug. The base axial first vent hole 10104 communicates with the base axial air supply groove 10111, and the base axial air supply groove 10111 communicates with the axial restrictor air supply groove 10901 on the right side of the rotating shaft axial support section 10702. The air supply groove 10901 of the axial restrictor on the left side of the rotating shaft axial supporting section 10702 is sequentially communicated with the axial air supply groove 10304 of the thrust plate, the axial second vent hole 10303 of the thrust plate, the radial vent hole 10302 of the thrust plate, the axial first vent hole 10301 of the thrust plate, the vent hole 10201 of the backing ring, the axial second vent hole 10110 of the base and the radial sixth vent hole 10109 of the base, grooves for installing sealing rings are arranged at the hole openings of the vent hole 10201 of the backing ring and the axial second vent hole 10110 of the base, and threads for installing plugs are arranged at the hole opening of the radial vent hole 10302 of the thrust plate.
The static pressure gas introduced into the air floatation support assembly 1 reaches the air supply grooves 10901 of the axial restrictor and the air supply grooves 11003 of the radial restrictor, and then reaches the support surface of the bearing through the combined throttling action of the micro-pores and the throttling pores in the porous material, so that the support air film obtains larger bearing capacity and rigidity.
The air flowing out of the outer sides of the left axial supporting air film and the right axial supporting air film is exhausted into the atmosphere through a millimeter-scale radial gap between the backing ring 102 and the rotating shaft axial supporting section 10702 and a backing ring exhaust hole 10202, and a screw thread for installing a dust plug is arranged at the orifice of the backing ring exhaust hole 10202. The gas flowing out from the inner side of the right axial supporting gas film and the left side of the radial first supporting gas film passes through the rotating shaft exhaust hole 10709, then flows through a millimeter-scale radial gap between the rotating shaft first transition section 10701 and the thrust plate 103 together with the gas flowing out from the inner side of the left axial supporting gas film, then flows through a hermetic seal labyrinth formed among the thrust plate first annular boss 10306, the thrust plate second annular boss 10307, the first chip retaining groove 10402 and the second chip retaining groove 10403, and then is exhausted into the atmosphere, and impurities such as cutting cooling liquid, chips, dust and the like are prevented from entering the inside of the bearing.
Radial flow controller exhaust groove 11001 evenly is provided with a set of diameter for radial flow controller exhaust hole 11002 of millimeter magnitude along circumference, both sides are provided with the radial first exhaust hole 10113 of base in radial flow controller exhaust groove 11001 and 2 radial flow controller 110 middle corresponding position department about base 101, the radial second exhaust hole 10114 of base, the radial third exhaust hole 10115 of base, the radial fourth exhaust hole 10116 of base and the radial fifth exhaust hole 10117 of base, the radial first exhaust hole 10113 of base, the radial second exhaust hole 10114 of base, the radial third exhaust hole 10115 of base, the radial fourth exhaust hole 10116 of base, the radial fifth exhaust hole 10117 of base drill way department is provided with the screw hole of installation end cap, and form the exhaust runner of base 101 with the axial exhaust hole 10118 intercommunication of base. The gas that radial first supporting gas film removed the left side outflow and the gas that radial second supporting gas film flowed out flows through radial restrictor exhaust hole 11006, radial restrictor exhaust groove 11001, base 101 exhaust runner, and the millimeter level clearance between base 101 hole and pivot second exhaust changeover portion 10705, pivot second changeover portion 10707, radial clearance that flows through between motor stator 217 and motor rotor 218 plays the cooling effect to the motor again, again through the exhaust hole that the protective sleeve 204 right side set up and discharge into the atmosphere, the drill way department of protective sleeve 204 exhaust hole is provided with the screw thread of installation dust plug.
Threaded holes for dynamic balance are uniformly and axially formed in the outer cylindrical surfaces of the scrap baffle 104, the rotating shaft axial supporting section 10702 and the rotor installation shaft limiting section 21602, the backing ring 102 and the stator installation part first step 20103 are provided with process holes for installing dynamic balance screws at the axial corresponding positions of the dynamic balance threaded holes of the rotating shaft axial supporting section 10702 and the rotor installation shaft limiting section 21602, and threaded holes for installing plugs are arranged at the hole openings of the process holes.
The grating reading head 206 measures the angular position of the spindle, and an external spindle controller can control the motor to drive the rotating part of the air bearing assembly 1 to rotate to a specified position according to an input position instruction; the magnetic grid reading head 212 measures the rotating speed of the spindle, and an external spindle controller can control the motor to drive the rotating part of the air bearing assembly 1 to rotate at a specified rotating speed according to an input speed command.
The left side surface of the sucking disc 105 is uniformly and radially provided with a group of sucking disc air exhaust grooves 10505, 2 sucking disc air exhaust holes 10504 communicated with the sucking disc air exhaust grooves 10505 are uniformly arranged in each sucking disc air exhaust groove 10505 along the circumferential direction, sucking disc radial vent holes 10503 communicated with the sucking disc air exhaust holes 10504 are arranged at the circumferential corresponding positions, and counter bores and threads are sequentially arranged at the hole openings of the sucking disc radial vent holes 10503 from outside to inside. The air blocking rod 108 is composed of an inner hexagonal cylindrical section 10801, a threaded section 10802 and a groove sealing section 108003, the inner hexagonal cylindrical section 10801 and the threaded section 10802 are respectively arranged in a counter bore and a thread of the orifice of the suction cup radial vent hole 10503, the diameter of the groove sealing section 10803 is smaller than that of the suction cup radial vent hole 10503 by sub-millimeter magnitude, and a groove for mounting a sealing ring is arranged at a corresponding position outside each suction cup air exhaust groove 10505. The same position on the sealing section 10803 of each groove of the air blocking rod 108 is provided with 1 sealing ring, so that the radial suction cup vent hole 10503 on the outer side of the circumference of the suction cup 105 where the sealing ring is located is not communicated with the axial suction cup vent hole 10502, while the radial suction cup vent hole 10503 on the inner side is communicated with the axial suction cup vent hole 10502, and then is communicated with the chip blocking plate suction hole 10406, the filter plug mounting hole 10405, the chip blocking plate suction hole 10404, the rotating shaft suction hole 10708, the rotor mounting shaft suction hole 21604, the rotor pressing plate 215 suction hole, the grid mounting shaft suction hole 21407 and the joint suction hole 20804 in sequence to form a vacuum air suction flow passage, and after the vacuum air suction flow passage is vacuumized, the part is fixed on the left surface of the suction cup 105 through the negative pressure formed in the suction groove 10505 and rotates together with the part. The sealing rings are arranged on different grooves of the groove sealing section 10803, so that parts with different diameters can be adsorbed on the sucking disc 105, and clamping of parts with different diameters is realized.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A porous and micropore combined throttling gas static pressure turning electric spindle is characterized by comprising an air floatation supporting assembly (1);
the air-floating supporting assembly (1) comprises a rotating shaft (107), wherein a rotating shaft axial supporting section (10702), a rotating shaft radial first supporting section (10704) and a rotating shaft radial second supporting section (10706) are sequentially arranged on the rotating shaft (107) along the direction from one end of the rotating shaft to the other end of the rotating shaft (107), axial throttles (109) are respectively arranged on two sides of the rotating shaft axial supporting section (10702) to form a left axial supporting air film and a right axial supporting air film, and radial throttles (110) are respectively arranged on the rotating shaft radial first supporting section (10704) and the rotating shaft radial second supporting section (10706) to form a radial first supporting air film and a radial second supporting air film;
the outside of axial flow controller (109) is along the outside of axial, radial flow controller (110) and all is equipped with many annular air feed grooves along radial, at least one be equipped with a plurality of transition air feed holes in the air feed groove, be equipped with the throttle micropore in the transition air feed hole, the throttle micropore and the axial flow controller (109) inboard intercommunication of axial flow controller (109), the throttle micropore and the radial flow controller (110) inboard intercommunication of radial flow controller (110).
2. The porous and micropore combined throttling gas static pressure turning electric spindle according to claim 1, wherein a plurality of annular radial throttling device exhaust grooves (11001) are formed in the inner side of each radial throttling device (110) along the length direction of the radial throttling device, the area between every two adjacent radial throttling device exhaust grooves (11001) is a radial throttling device supporting surface (11002), a plurality of radial throttling device air supply grooves (11003) are uniformly distributed in the axial direction on the outer side of each radial throttling device (11002) corresponding to each radial throttling device supporting surface (11002), a plurality of radial throttling device air supply grooves (11003) corresponding to each radial throttling device supporting surface (11002) are communicated with each other, and a plurality of radial transitional air supply holes (11004) are formed in at least one radial throttling device air supply groove (11003) in the corresponding plurality of radial throttling device air supply grooves (11003).
3. The porous and micropore combined throttling gas static pressure turning electric spindle according to claim 1, wherein the air floatation support assembly (1) further comprises a thrust plate (103), a backing ring (102) and a base (101) which are sequentially sleeved from one end to the other end of the rotating shaft (107), the backing ring (102) is sleeved at the outer end of the axial support section (10702) of the rotating shaft, a limit boss (10101) is arranged in the middle of the inner side of the base (101), and the two radial throttles (110) are positioned at two sides of the limit boss (10101); two axial flow controller (109) are located respectively between base (101) tip and pivot axial supporting section (10702) one side, between thrust plate (103) and pivot axial supporting section (10702) opposite side, be equipped with the passageway of intercommunication each other between thrust plate (103), backing ring (102) and base (101) for left axial supporting air film, right axial supporting air film, radial first supporting air film and radial second supporting air film air feed.
4. The porous and microporous combined throttling aerostatic turning motorized spindle according to claim 3, wherein a gap is left between the backing ring (102) and the axial supporting section (10702) of the rotating shaft, the backing ring (102) is provided with a backing ring exhaust hole (10202), and the backing ring exhaust hole (10202) is communicated with the outer side of the left axial supporting air film and the outer side of the right axial supporting air film through the gap.
5. A porous and microporous combined throttling aerostatic turning motorized spindle according to claim 3, characterized in that the air-bearing support assembly (1) further comprises a chip blocking plate (104) engaged with one end of the thrust plate (103), the thrust plate (103) is located between the chip blocking plate (104) and the backing ring (102), a cylindrical chip blocking plate sealing boss (10401) is provided in the middle of one end of the chip blocking plate (104) close to the thrust plate (103), the chip blocking plate sealing boss (10401) is in sealing connection with the inner side of the rotating shaft (107), and the connection between the chip blocking plate (104) and the thrust plate (103) forms an airtight labyrinth.
6. A porous and micropore combined throttling gas static pressure turning electric spindle according to claim 5, wherein a through rotating shaft exhaust hole (10709) is formed in the rotating shaft axial supporting section (10702), a rotating shaft first exhaust transition section (10703) is further formed in the rotating shaft (107), the rotating shaft first exhaust transition section (10703) is located between the rotating shaft axial supporting section (10702) and the rotating shaft radial first supporting section (10704), a gap is reserved between the rotating shaft first exhaust transition section (10703) and the base (101), and gas flowing out through the gap on the inner side of the right axial supporting gas film and the left side of the radial first supporting gas film can be exhausted through the gas sealing labyrinth together with gas flowing out of the inner side of the left axial supporting gas film after passing through the exhaust hole rotating shaft (10709).
7. A porous and microporous combined throttling aerostatic turning electric spindle according to claim 1, characterized by further comprising a drive assembly (2); the driving assembly (2) comprises a rotor mounting shaft (216), the rotor mounting shaft (216) is connected with the other end of the rotating shaft (107) and is coaxially arranged, a motor rotor (218) is sleeved on the outer side of the rotor mounting shaft (216), a motor stator (217) is sleeved on the outer side of the motor rotor (218), a stator mounting piece (201) is sleeved outside the motor stator (217), the stator mounting piece (201) is fixed at the end part of the base (101), and a cooling sleeve (202) is mounted on the stator mounting piece (201) and used for circulating cooling fluid; the motor stator pressing plate pressing device further comprises a stator pressing plate (203) used for pressing the motor stator and a rotor pressing plate (215) used for pressing a motor rotor (218); the device is characterized by further comprising a grid mounting shaft (214) fixed at one end, far away from the rotating shaft (107), of the rotor pressing plate (215), wherein a circular grid ruler (207) and a circular magnetic grid ruler (211) are sleeved on the grid mounting shaft (214) in a staggered mode along the axial direction.
8. A porous and microporous combined throttling aerostatic turning motorized spindle according to claim 7, characterized in that the drive assembly (2) further comprises a shielding sleeve (204) located at an end of the grid mounting shaft (214) remote from the spindle (107), the shielding sleeve having a circumferential end fixed to the stator pressing plate (203), the shielding sleeve (204) having a vent hole;
the rotating shaft (107) is further provided with a rotating shaft second exhaust transition section (10705) and a rotating shaft second switching section (10707), the rotating shaft second exhaust transition section (10705) is located between the rotating shaft radial first supporting section (10704) and the rotating shaft radial second supporting section (10706), a gap is reserved between the rotating shaft second exhaust transition section (10707) and the base (101), the rotating shaft second switching section (10707) is located between the rotating shaft radial second supporting section (10706) and the rotor mounting shaft (216), a gap is reserved between the rotating shaft radial second supporting section and the base (101), the base (101) is provided with an exhaust channel, the radial first supporting gas film removes gas flowing out from the left side, and the rest gas and the gas flowing out from the radial second supporting gas film are discharged into a radial gap between the motor stator (217) and the motor rotor (218) through an exhaust groove on the radial restrictor (110), an exhaust flow channel of the base (101), and the gap between the rotating shaft second exhaust transition section (10705) and the rotating shaft second switching section (10707), and finally out of the vent holes in the protective sleeve (204).
9. A porous and micropore combined throttling gas static pressure turning electric spindle according to claim 7, wherein the rotating shaft (107), the rotor mounting shaft (216), the rotor pressing plate (215) and the grid mounting shaft (214) are coaxially arranged, a through hole is sequentially formed in the middle of the rotating shaft, a vacuum adapter (208) is arranged in the middle of the protective sleeve (204), the vacuum adapter (208) extends into the inner side of the grid mounting shaft (214) and is connected with the grid mounting shaft in a clearance and air-tight manner, a sucking disc (105) is further arranged at one end of the rotating shaft (107), and the sucking disc (105) is used for clamping parts.
10. The porous and micropore combined throttling gas static pressure turning electric spindle as claimed in claim 9, wherein a plurality of sucking disc air suction grooves (10505) are uniformly distributed along the radial direction on the surface of one end of the sucking disc (105) far away from the rotating shaft (107), a sucking disc radial vent hole (10503) is further arranged on the sucking disc (105), a sucking disc axial vent hole (10502) is arranged in the middle of the sucking disc (105), one end of the sucking disc radial vent hole (10503) is communicated with the outside, the other end of the sucking disc radial vent hole (10503) is communicated with the sucking disc axial vent hole (10502), a sucking disc air suction hole (10504) is arranged in the sucking disc air suction groove (10505), the sucking disc radial vent hole (10503) is communicated with the sucking disc air suction hole (10504), a counter bore and a thread are sequentially arranged at the orifice of the sucking disc radial vent hole (10503) from the outside to the inside for screwing the air blocking rod (108), and a thread section (10802) and a groove sealing section (10803) are sequentially arranged on the air blocking rod (108), the groove sealing section (10803) is provided with a groove for mounting a sealing ring, and is used for enabling the sucker axial vent hole (10502) on the outer side of the sealing ring to be not communicated with the sucker radial vent hole (10503) and enabling the sucker axial vent hole (10502) on the inner side of the sealing ring to be communicated with the sucker radial vent hole (10503).
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| CN202111248164.2A CN113894300B (en) | 2021-10-26 | 2021-10-26 | Porous and micropore combined throttling gas static pressure turning electric spindle |
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| CN114310427A (en) * | 2022-01-26 | 2022-04-12 | 郑州大学 | Axial feeding and rotating device for ultra-precision machining |
| CN114909399A (en) * | 2022-06-14 | 2022-08-16 | 哈尔滨工业大学 | Anti-overturning load large-bearing air-floating main shaft structure |
| CN114992242A (en) * | 2022-06-16 | 2022-09-02 | 中国工程物理研究院机械制造工艺研究所 | Anti-disturbance air bearing |
| CN115523231A (en) * | 2022-09-16 | 2022-12-27 | 哈尔滨工业大学 | High-rotation-precision large-bearing aerostatic bearing with radial bearing for regional gas supply |
| CN116877577A (en) * | 2023-07-10 | 2023-10-13 | 通用技术集团机床工程研究院有限公司 | Annular thin-sheet porous throttling air bearing |
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