Electric spindle |
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IPC classes for russian patent Electric spindle (RU 2479095):
 Electric fan set with improved cooling / 2453967
Invention relates to electric engineering, namely - to electric machines, and deals with the specific features of fixing elements design for electric motors, particularly, fan sets intended for heating, ventilation and/or air-conditioning plants. This invention proposes a device (40) for fixing electric motor (16) containing accommodating seat (41) for motor installation with a wall (42). According to the invention, the device (40) for fixing electric motor (16) implemented so that the first (18A) and second (18B) air pumping element can be rotated. The air pumping element includes accommodating seat (41) to install electric motor (16) and a wall (42). Besides, the obstructing elements (60, 62; 72, 74, 76; 80) are placed between the electric motor (16) and accommodating seat (41) wall (42). The obstructing elements are implemented so that they can obstruct air flowing between electric motor (16) and wall (42) of accommodating seat and air flow be redirected through electric motor (16).
 Electric motor of mining mill of direct drive system / 2417505
Electric motor has a circular segmented stator core, laminated from sheets of electric steel, in a stand, with three-phase winding laid into core slots, inside which there is a rotor installed in the form of the mill body, outside of which in grooves there are permanent magnets arranged from alloy Nd-Fe-B (neodymium - iron - boron), and between them there are electroconductive rods of short-circuited winding, and steel armoured boards laid in shock absorbers are fixed inside to the body with screws.
 Double-winding startor with m=3-phase 2p1=10- and 2р2=12-pole lap windings in z=180 slots / 2362251
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. The double-winding stator of an asynchronous motor has m = 3 - phase, 2p1 = 10- and 2p2 = 12-pole lap windings, placed in z =180 slots, each of which is symmetrical with m' = 6 - zone of uniformly displaced windings, placed in slots in two layers. According to this invention, of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 = 3 neighbouring windings in each, and the 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk2 turns and connected, when q'2 = 5/2, in 6p2 alternating three- and two sub-groups of windings. All windings have slot pitch yk= 15, where q'1 = z/12p1 and q'2 = z/12p2.
 Combined electric propulsion plant of open type / 2306656
In combined electric propulsion plant, containing a screw built into hollow cylindrical rotor, stator with windings and bearing shields, combined in single structure, an asynchronous electric motor with hollow three-layered rotor is used, which is made in form of assembly of three concentric cylinders of varying thickness of various materials with predetermined electromagnetic properties, in accordance to the invention, external cylinder with thickness hext combines functions of working element and screen and has screw-groove profile on the surface, middle working cylinder with thickness hwrk, in which working vortex currents are induced, is made of separate segments in amount of nsegm, each segment has clean longitudinal grooves in axial direction in amount of ngrv, all segments are mutually closed on ends with current-conductive short-circuit rings, internal cylinder with thickness nin, acting as magnetic duct, composed of separate plates 0,5-2 mm thick and covered by protective sealing screen on the outside, while geometric dimensions of rotor elements are selected from ratios hext=(2-2,5)Δν≈2-3mm, hwrk=0,9Δ2, hin=(1,2-1,5)Δ3, hk=Δν, ak=0,7-1mm, vk=3-3,5mm, nsegm=2p, hp=(0,6-0,7)Δ2, an=1,5-2mm, Vn=τ/4, where Δν, Δ2, Δ3 - depth of penetration of magnetic field into corresponding cylinder, hK, aK and vk - respectively, depth, width and step of screw groove, 2p - number of poles, hp, ap and vk - respectively, depth, width and distance between longitudinal grooves, τ - polar division of rotor, ν - harmonic of high order field.
 Motor-fan unit / 2292623
Proposed motor-fan unit that can be used, for instance, in mining mechanical engineering is built around squirrel-cage induction motor and has frame with stator and rotor mounted therein. Novelty is that rotor carries fan blades, stator and rotor have conical surfaces, angles at vortices of stator and rotor cones are greatly different with respect to their contact between mentioned conical surfaces in absence of their wedging to afford antifriction bearing function, and stator mounts cleat preventing rotor-to-stator shift , for instance in axial direction.
 Rotary-drive contact device / 2267841
Rotary contact device has contact couples made of smooth current-conductive rings and rings with leafs sliding along the latter, while these rings are held on electric-insulating bases, some of which, forming moving portion, can rotate relatively to others, which form immovable portion of device, rotary portion is made in form of electric engine rotor, meant for mounting devices and mechanisms, on external surface of rotor permanent magnets are glued, and magnetic duct is pressed into body together with winding, on rotor, sliding contacts are held, immovable portion of device has carrier, held on base, mounted on the body. In the carrier, rotation angle indicator may be held.
 Electric motor / 2248657
Proposed motor has circular stator core with permanent magnets symmetrically disposed on its outer and inner surfaces over its circumference in alternating polarity and through core thickness in opposing polarity; it also has double-section rotor one of whose sections encloses stator and functions as external section while other section is disposed inside stator and functions as internal section. In addition motor has commutator-type current distributor and current collector both mounted for contacting commutator-type distributor segments and are connected to area of electromagnets of mentioned rotor sections.
 Dynamoelectrical machine set in rotary motion by electromagnetic induction acting in linear electric motors / 2248080
Proposed dynamoelectrical machine is set in rotary motion by means of magnetic induction acting in linear electric motors. It has ring-shaped rotor made in the form of flat ring and provided with at least one circular rail engageable with sliding guides; it also has stator that carries inductance coil and interacts with at least one part of rotor. Circular rail is disposed outside or inside with respect to stator.
 Induction motor / 2171542
 Induction motor / 2171540
The invention relates to electrical engineering and can be used as asynchronous motors for a complete set of actuators for domestic and industrial use, in particular electric drives of pumps
 Electric machine / 2477916
Electric machine contains a sealed housing the cavity whereof accommodates a laminated stator core made of electrical steel; along the outer diameter, the laminated stator core relying on the electric machine housing; the stator core has open slots wherein winding coils are placed while the stator cylindrical cavity accommodates the electric machine rotor installed so that to enable rotation. According to this invention, the laminated stator core has radial inter-pack ventilation channels, the aerodynamically communicating housing longitudinal channels with inlet holes, communicating with environments via a filter; the conductors of each stator slot winding are fixed with a wedge and a spline insert contacting it, the said insert cross section designed so that to enable fixation of the spline insert back under the slot wedge while the projection cross section matches that of the slot; the spline insert back surface, along the whole of its length, has a longitudinal groove communicating with the stator core inter-pack ventilation channels; the spline inserts volumes projecting above the stator core cavity surface are joined to form a tubular sleeve, preferably - composed of segments, with a cylindrical-shaped inner surface formation; installed inside the housing cavity, coaxial to the stator core cavity, are cylindrical sleeves made of an insulation material such as glass-cloth-base laminate, the sleeves butt-ends attached to those of the stator utmost packs; additionally, the rotor contains an inducer with a cylindrical external surface consisting of poles, permanent magnets, non-magnetic wedges and a shaft; the rotor length exceeds that of the inducer; rigidly attached to the inducer butt-ends are end cylindrical sleeves made of a non-magnetic material, installed flush relative to the inducer external surface and placed inside the stator cylindrical sleeves cavities representing journals of radial gasodynamic petal bearings.
 Electric machine / 2474945
Electric machine comprises a tight body, in the cavity of which a laminated stator core is installed with open slots, where winding coils are arranged, and a rotor. At the same time the laminated stator core is equipped with radial packet-to-packet ventilation channels, aerodynamically communicated longitudinal channels of the body with inlet holes communicated via a filter with environment, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it, the cross section of which is arranged as capable of fixing the key insert back under the slot wedge, and the section of the ledge corresponds to the section of the slot splint, the surface of the key insert back along its entire length is equipped with a longitudinal chute communicated with packet-to-packet ventilation channels of the stator core, volumes of key inserts protruding above the surface of the stator core cavity are combined into a tubular bushing, preferably made from segments, with formation of the inner surface of cylindrical shape, besides, in the cavity of the body there are cylindrical bushings installed, the diameter of the cavity in which is equal to the diameter of the tubular bushing, between ends of the stator core and ends of cylindrical bushings facing them there are thrust rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar, covering a part of the outer surface of the cylindrical bushing. Thrust rings are made of non-magnetic material and are fixed with a stator core, cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, end shield and thrust rings are equipped with sealing rings made with the possibility of elastic deformation radially and along the relatively longitudinal axis of the stator core. The electric machine comprises an inductor with the outer cylindrical surface made of poles, permanent magnets, non-magnet wedges, a shaft, the length of which exceeds the length of the inductor, besides, with the inductor ends there are end cylindrical bushings fixed rigidly, which are made of a non-magnetic material and arranged aflush with the outer surface of the inductor.
 Plain thrust-journal bearing on shaft driving end of asychronous machine of vetohin for oil-and-gas wells (amv ogw) / 2449455
Creation of multipurpose high-loaded thrust-journal bearing on shaft driving end of submersible electric motor of vertical open design is executed using inserts made of high-density frictionproof powder material. Asynchronous machine (AMV OGW) contains housing (1), shaft (2) with collar (3) on driving shaft end and having thrust surfaces (4) and (11) at both sides which surfaces function as moving sliding surfaces (4) for pump, (11) for drilling gear. For immovable parts of bearing, inserts (6) and (10) are used which are made of high-density frictionproof powder material with the same sliding surfaces (4) and (11) allowing motor to work with its driving end up for pump driving and down - for drilling gear driving. Cooling of bearing sliding surfaces is executed by fluid environment through holes (13) and (14) in the housing (1) and through free gaps (7), (15), (16), (17) between the housing (1) and the shaft (2).
 Radial thrust plain bearing on idle shaft extension of vetockhin induction motor for oil-and-gas wells / 2444831
Downhole induction motor shaft idle extension supports radial thrust plain bearing to make rotor aligned with stator bore and keep working clearance between rotor and stator invariable. Proposed induction motor comprises housing 1, end shield 4, shaft 6 with idle extension provided with moving thrust sleeve 8 that has thrust sliding surface 9 radial sliding surface 10. Fixed bearing insert 11 made from high-density powder material and having similar sliding surfaces 9 and 10 is tightly fitted in cylindrical recess of said bearing shield. Sliding pairs are cooled down via free clearance 12 and bearing shield holes 13. Cooling water is fed outside via holes 14 and 15 in housing 1.
 Noncontact electric motor / 2424611
Noncontact electric motor includes hollow cylindrical nonmagnetic slotless stator with winding, which is arranged between parts of composite rotor. Outer part of rotor is made in the form of ferromagnetic shell, and inner part is made in the form of cylindrical constant magnet fixed on shaft in bearings. The latter are arranged in support sleeves of stator ends, which can be made from heat-resistant dielectric material.
 Hydrogenerator / 2418979
Hydrogenerator includes rotor 1, oil bath of centre plate, which has external and internal walls 3 and 6, support elements 4, cover 7 and condensers 8 of oil vapours and detachable ring filter 9, gravity filter 10 and water ejector 11, which are arranged on cover 7 and attached to each other and through condenser 8 to air cavity of oil bath, absorption cooling chambers with oil receiver, non-return valve 13 and tight valve 22. In oil bath there installed are flexible U-shaped pipelines 23 which are rigidly pressed by means of clamps to walls 3 and 6 of oil bath and to its bottom 2. Inlet edges of face of pipelines 23, which are adjacent to wall 6, are located in air cavity of oil bath restricted with rotor 1 and wall 6 and above level of oil filling the oil bath. Outlet edges of pipelines 23 which are adjacent to wall 3 are located in air cavity of oil bath restricted with rotor 1, wall 3 and cover 7 and above level of the oil filling the oil bath and inlet edges of pipelines 23 which are adjacent to wall 6.
 High-speed electric machine / 2385524
In proposed high-speed electric machine, comprising body equipped with end shields, stator core equipped with winding, in cylindrical cavity of which there is a rotor installed with gap, comprising inductor and bearing unit, according to invention, bearing unit is arranged with the possibility of gas dynamic support of rotor, for this purpose outer surface of rotor is shaped as a cylinder, besides it is located in cavity of cylindrical bush, preferably thin one, fixed against slipping in end shields, with a gap to its surface, open at the side of end shields, besides bush is made of insulation non-magnet antifriction material.
 Electric machine / 2385523
In proposed electric machine, comprising body arranged with the possibility to supply cooling gas into its cavity, equipped with end shields and facilities for supply of cooling gas to units arranged in body cavity, stator core equipped with winding, in cylindrical cavity of which there is a rotor installed with gap, comprising inductor and bearing unit, according to invention, bearing unit is arranged with the possibility of gas dynamic and gas static support of rotor, for this purpose outer surface of rotor is shaped as a cylinder, besides it is located in cylindrical cavity of bush fixed against slipping in end shields, between outer surface of bush and stator core cavity surface inverted to it there are longitudinal channels arranged, bush is installed with gap versus surface of rotor and is arranged of insulation non-magnet antifriction material, besides cavities of longitudinal channels are communicated with gap between bush and surface of rotor, at least via one circular row of through holes in bush wall.
 Electric machine with axial spring-controlled element / 2361348
Invention relates to electric engineering, and particularly, to electric machines and deals with their specific design being provided axial spring-controlled element. The said element is installed between rotor part on rotor shaft and antifriction bearing. Mainly, electric machine (10) is intended for bringing functional elements into operation in motor car. The said electric machine contains rotor with shaft (12) being installed in case-shaped part (16) so that it can rotate in antifriction bearing (22, 20). There is axial spring-controlled element (32) between antifriction bearing and rotor part, which is fixed to rotor shaft (12). The spring-controlled element is provided with inner (40) and outer (42) rings interconnected so that they can spring in axial direction. Outer ring (42) of axial spring-controlled element (32) is connected with rotor part (34).
 A ustyuzhin electrcal unit / 2335838
Electrical unit incorporates a stator, a rotor and rotor bearings with magnets arranged on the rotor and stator. In compliance with this invention, every bearing of rotor is furnished with magnetic equalising device representing a pair of magnets fastened on the stator and the rotor shaft end with the like poles opposed, or a magnet fitted on the rotor shaft with the one-type pole facing the rotor bearing magnet fitted on the stator.
 Rotor for electrodynamic machine / 2479093
Rotor for an electrodynamic machine, in particular, for a hydraulic generator, comprises a body, which is assembled from many segments (10) of sheet metal arranged in axial direction one after another, between segments (10) for creation of cooling channels there are location links (14), which are supported by bolts (12) to carry centrifugal forces acting on them, and the bolts stretch in axial direction through the body of the rotor of sheet metal. At the same time at least one part of the specified location links is assembled from many separate parts at least partially located above each other. Each assembled location link comprises an upper part and a lower part, at the same time one of both specified parts has an expanded first section with a hole for insertion of axial bolts of the body from sheet metal, and also two narrow second sections in the form of radial fingers, which are arranged at the distance from each other, and another one from both specified parts is made in the form of a disc with a hole, at the same time the specified disc with a hole and the specified first section with the hole arranged in it are arranged above each other.
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FIELD: electricity. SUBSTANCE: electric spindle comprises a body, in the cavity of which there is a laminated stator core, equipped with semi-closed slots, in which there are winding coils placed, besides, in the cylindrical cavity of the stator there is a rotor installed as capable of rotation, and its bearing unit is arranged as capable of gas-dynamic support, at the same time the electric spindle is equipped with a clamp for fixation of a working tool. At the same time, according to this invention, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it from insulating material, the cross section of which is made as capable of fixation of the key insert back under the slot wedge, and the ledge section complies with the slot splint section, besides, the profile of the key insert ledge surface corresponds to the surface of the cylindrical cavity of the stator core, the surface of the key insert back along its entire length is equipped with a longitudinal chute, which is open into an inner cavity of the spindle body arranged as capable of supplying air into it, in the cavity of the electric spindle body there are cylindrical bushings placed, the diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, and between the ends of the stator core and the ends of cylindrical bushings facing them there are support rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar that covers a part of the outer surface of bushings, the specified thrust rings are made of non-magnet material and are fixed with the stator core, and the cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, the end shield and collars of thrust rings are equipped with sealing rings arranged as capable of elastic deformation radially and along the longitudinal axis of the stator core. The rotor is made with inner cavities, for this purpose it comprises coaxial hollow shaft and shell, which are rigidly connected to each other, at least by three links equidistant from each other and made in the form of plates of identical thickness, being aligned radially to the longitudinal axis of the rotor, the ends of the rotor are rigidly fixed to the end covers, for instance, by vacuum-diffusion welding, besides, one of end covers of the rotor is arranged as thickened and is equipped with a clamp for fixation of a working tool. EFFECT: increased life of electric spindles, including those operating under higher and high frequencies of rotation, with simultaneous provision of minimum rotor sagging and improved cooling of both a rotor and a winding of an electric spindle stator. 3 cl, 2 dwg
The invention relates to the field of electrical engineering, in particular to electrical engineering and can be used, for example, spindle units of metal-cutting machines with high speed. Known spindle grinding machine containing a drive shaft mounted in the housing at two angular contact bearings formed by the conical surfaces of the shaft and covering their tapered surfaces of the sleeves, which are separated by a gas gap, and one of the bushings installed in the hard case, and the second with the possibility of axial movement through the device moves, acting on the end surface of the sleeve, and a system of lubrication. The second sleeve is installed in the housing through the adjusting ring, and the tapered surfaces of the shaft are made deaf longitudinal segmental grooves of variable depth, which increases the ends of the bearings. The shifter is made in the form of a group of springs with different stiffness (patent RU 2224919, IPC 6 F16C 32/06, 2004). The drawback of this device is the lack of tightness of the ends of the adjustment ring, the mating housing and the movable sleeve. In the process of thermal deformation of the drive shaft begins to operate the shifting mechanism, compensating for temperaturedependence. Movable sleeve under the influence of temperature deformations of the drive shaft through the bearing gap is shifted in the axial position, compressing the spring, maintaining optimum bearing clearances. This offset rethermalized the ends of the adjusting ring. In these gaps dust and these gaps are deposited raids fluids Metalworking fluids and abrasive, accompanying the process of grinding. Naturally, after the pollution of these gaps and the disappearance of thermal deformations of the movable sleeve will not occupy its original position. Thus undesirable happen correction adjustable ring with automatic impact on the value of the optimum bearing clearance of the electric spindle. It should be noted that this negative process with the duration of the operation of the device increases, which reduces its efficiency. The bearings with gas lubrication are limited in carrying capacity. The closest to this invention the device is a spindle, comprising a housing, a cavity which is placed laminated stator core, provided with semi-closed slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably placed the rotor, a bearing unit which is configured to gasdynamic maintain, p. and this spindle is equipped with a clamp for fixing the working tool (see RF patent №2408802, IPC F16C 32/06, 2008). The disadvantage of this device is the inability to use the gas layer in the gap between the stator and rotor for the organization of the gas bearing, which prevents the increase of its load carrying capacity and stiffness of the gas layer of the bearing, and hence the impossibility of its use in a powerful electrospindle. The challenge which seeks the proposed solution is to increase the service life of the electric spindle through the use of specially organized gas bearing, providing high long-term reliability of the electric spindle, and reduce its mass and size parameters, as well as extending the range of application of the gas bearings on a powerful electric spindles with significant mass of the rotor. The technical result is achieved when the solution of the problem, reflected in the increasing resource electrospindle, including operating at higher and higher speeds. At the same time ensures a minimum deflection of the rotor, the cooling of the rotor and stator winding. The problem is solved in that the spindle, comprising a housing, a cavity which is placed laminated stator core, provided with semi-closed slots, which are placed in the coil winding, and cylindrically cavity stator rotatably placed the rotor, bearing unit which is configured to gas maintenance, while the spindle is equipped with a clamp for fixing the working tool, characterized in that the conductors of the winding of each slot of a stator fixed wedge and contact with him dowel insertion, the cross section of which is made to lock the backrest keyed inserts under the wedge groove, and the cross section of the projection corresponds to the cross section of the slot groove, and the surface profile of the keyed protrusion of the insert corresponds to the surface of the cylindrical cavity of the stator core, in addition, the surface of the backrest keyed insert along its entire length with longitudinal groove open to the internal cavity of the housing of the spindle which has a capability to supply in her air, in addition, in the cavity of the housing of the electric spindle cylindrical sleeve, the diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, while between the end faces of the stator core and addressed to them the ends of the cylindrical bushings posted by retaining ring, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, provided with a flange covering portion of the outer surface of the bushings, and thrust washers made of non-magnetic material and fixed to the stator core, in addition, Qili the shape of the sleeve is installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, why the contacts of the sleeves with the body, face shield and shoulder thrust ring provided with sealing rings made with the possibility of the elastic deformation of radially and along the longitudinal axis of the stator core, in addition, the rotor is constructed with internal cavities, for which it contains a coaxial hollow shaft and the shell, tightly bonded with each other at least three equidistant from each other jumpers, made in the form of plates of equal thickness, oriented radially to the longitudinal axis of the rotor, in addition, the ends of the rotor are rigidly bonded to the end caps, for example, vacuum diffusion welding, in addition one of the end cap of the rotor is made of a thickened and provided with a clamp for fixing the working tool. In addition, mates with the shaft and the shell thickness jumpers gradually increases toward the contact with these surfaces. When this rotor is made from a material with high magnetic permeability. Comparative analysis of the essential features of the proposed technical solutions and essential features of the prototype and analogues demonstrates its compliance with the criterion of "novelty". While the essential features of the characterizing part of the claims, solves the following functional tasks. Signs "...the wire is IKI winding of each slot of a stator fixed wedge and contact with him keyed insert..." provide retention of the conductors of each winding groove in its cavity and the possibility of mounting the stator winding. Signs indicating that the cross-section of the dowel insertion is made to lock the backrest keyed inserts under the wedge groove, and the cross section of the projection corresponds to the cross section of the slot groove..." provide reliable retention of the pins in the slot, eliminating the possibility of arbitrary radial displacement in the direction of the surface of the rotor. A sign indicating that the surface of the keyed protrusion of the insert corresponds to the surface of the cylindrical cavity of the stator core," provides "cylindricity" cavity of the stator, which has a rotor, and thus provides the conditions for the use of the gas layer in the gap between the stator and rotor for the organization of the gas bearing. Signs indicating that the surface backless dowel insert along its entire length with longitudinal groove open to the internal cavity of the housing of the spindle which has a capability supply of air to provide cooling of the coil. Signs indicating that "in the body cavity of the spindle mounted cylindrical sleeve, the inner diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, provide the possibility of using the surface of the inner cavity of the cylindrical bushings to increase the supporting surface of the gas under the of ipnii to increase its load carrying capacity. Signs indicating that "between the end faces of the stator core and addressed to them the ends of the cylindrical bushings posted by retaining ring, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, provide a "formation" groove for collecting air from the working gap of the bearing. Signs indicating that the thrust ring is provided "flange covering portion of the outer surface of the bushing and thrust washers made of non-magnetic material and bonded to a core of the stator to provide a reliable longitudinal and radial suspension" end of the cylindrical sleeves when using elastic sealing rings for ensuring the tightness of the joint, avoiding the destruction of the sealing rings. Signs indicating that "cylindrical bushings installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, which contacts the collet housing, the end shield and shoulder thrust ring provided with sealing rings made with the possibility of the elastic deformation of radially and along the longitudinal axis of the stator core, ensuring the stability of the rotor due to damping rubber o rings. Signs, the practice showing, "the rotor is constructed with internal cavities, for which it contains a coaxial hollow shaft and the shell, tightly bonded with each other at least three equidistant from each other jumpers, made in the form of plates of equal thickness, oriented radially to the longitudinal axis of the rotor, to reduce the mass and mass moments of inertia of the rotor and thereby extend the range of stability of a rotor in the form of "half rate of the vortex and increase the supply of static bearing capacity of gas-dynamic bearing with a slight decrease in strength of the rotor compared to the solid one-piece forged, in addition, this design prevents substantial deformation of the rotor radial direction from the centrifugal forces, thereby preventing jamming of the gas bearing. Signs indicating that "the ends of the rotor are rigidly bonded to the end caps, for example, vacuum diffusion welding"enhance the structural strength of the rotor. Signs indicating that one of the end cap of the rotor is made of a thickened and provided with a clamp for fixing the working tool", provide the claimed device functions spindle. Signs of the second claim of the invention contributes to increasing the strength of the rotor. Signs of tert is his claim of the invention provide an effective rotation of the rotor. Figure 1 shows a longitudinal section of the electric spindle, figure 2 - cross section. In the drawings is shown a housing 1, a stator core 2, the grooves 3, the winding 4, the wedges 5, keyway insert 6, the protrusion 7, the chute 8, the cylindrical sleeve 9, 10, retainer rings 11, 12, flange 13, the end shield 14, the sealing rings 15, 16, 17, 18, shaft 19, the shell 20, jumpers 21, the end caps 22, 23, the clamp 24, the gap 25, petal gas-dynamic bearings (TLP) 26, 27, the thrust washer 28, the fan 29, the filter 30, the holes 31, the cavity 32, push the sheets 33, 34, the shoulder 35 of the housing 1, the split ring 36. The spindle comprises a sealed enclosure 1, the cavity of which is placed the stator core 2 from electrical steel (see figure 1, figure 2). On the outer diameter of the stator 2 is based on the body of the spindle 1, and the inner diameter has an anti-friction coating of teeth, for example, the antifriction material WAP-3. The stator core 2 has a semi-grooves 3, which are placed in the coil winding 4. The conductors of the winding 4 of each groove 3 of the stator 2 is fixed slot wedge 5 and in contact with him keyed insert 6, the cross section of which is made to lock the backrest keyed insert 6 in the longitudinal cavity of the groove 3, and the cross section of the protrusion 7 corresponds to the cross section of the slot groove 3, and the surface of the ledge keyed insert 6 corresponds to the surface the minute cylindrical cavity of the stator core 2. Surface backless dowel insert 6 throughout its length provided with a longitudinal groove 8 open into the internal cavity of the housing 1 of the electric spindle made with the possibility of a supply of air into it. In the cavity of the housing 1 of the electric spindle mounted cylindrical sleeve 9,10, the inner diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core 2. Between the ends of the stator core 2 and addressed to them the ends of the cylindrical sleeves 9, 10 are placed retainer rings 11, 12, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core 2, provided with a shoulder 13, covering part of the outer surface of the sleeves 9, 10, and retainer rings 11 and 12 made of a nonmagnetic material and is bonded with the stator core 2. In addition, the cylindrical sleeve 9 and 10 is installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core 2, for which the contact plugs 9 and 10 of the housing 1, the end shield 14 and the flange 13 of the thrust rings 11, 12 are equipped with sealing rings 15, 16, 17, 18, made with the possibility of the elastic deformation of radially and along the longitudinal axis of the stator core 2. In the cylindrical cavity of the stator 2 is rotatably housed a rotor, a bearing unit which is configured to gas maintenance. otor made with internal cavities, what it contains coaxial shaft 19 and the ring 20 firmly attached to each other at least three equidistant from each other by crosspieces 21, made in the form of plates of equal thickness, oriented radially to the longitudinal axis of the rotor. The ends of the rotor are rigidly attached to end caps 22, 23, for example, vacuum diffusion welding, in addition, one of the end caps 22 of the rotor is made of a thickened and provided with a clamp 24 for fixing the working tool, such as a collet. In addition, mates with the hollow shaft 19 and the ring 20, the thickness of the bridges 21 gradually increases toward the contact with these surfaces. When this rotor is made from a material with high magnetic permeability, such as alloy CP. Between the outer cylindrical surface of the shell 20 and the inner surface of stator teeth 2, the dowel inserts 6, cylindrical bushings 9, 10 there is a small gap 25. Gas bearing form the surface of teeth of the stator core 2 and keyed inserts 6, facing the rotor, the inner surface of which corresponds to the curvature of the surface of the cylinder, a cylindrical sleeve 9, 10, the outer cylindrical surface of the shell 20 and the gap 25 between them. The axial bearing Assembly spindle are: axial petal gas-dynamic bearings (LGB) 26, 27, who porny disk 28. On the hard disk 28 is made of blades of the fan 29. When the rotor blades of the fan 29 to generate a vacuum, the air through the filter 30, the holes 31 in the housing 1 of the electric spindle passes through the longitudinal grooves 8 and exits. For cooling the housing of the electric spindle is provided by the cavity 32 of the cooling deionized water. The stator is assembled in the following order. From the stamped electrical steel sheets collect the package of the stator core 2 and the set pressure of the sheets 33, 34 on the ends and fasten them by welding through grooves on the outer cylindrical surface of the stator core 2. Later in the slots 3 of the stator core 2 install the slot insulation, stack winding 4 of the stator 2 and stuck her slot wedges 5. The winding 4 of the stator 2 is subjected to impregnation and drying. Inside the slots 3 of the stator 2 under the wedges 5 are tightly mounted on the glue to the dowel insert 6. Then grind the inner cylindrical surface of the stator core 2 and keyed inserts 6. Further, the inner cylindrical surface of stator teeth 2 and cylindrical bushings 9, 10, keyed inserts 6 cover antifriction material, such as WAP-3. The ends of the stator core paste retainer rings 11 and 12 made of a nonmagnetic insulating material such as fiberglass, concentric to the internal qi is andrijeski surface of the stator 2. Under the retaining ring 11 against him insert a cylindrical sleeve 9 with put on her rubber sealing rings 15, 16. The assembled package is inserted into the housing 1 of the electric spindle until it stops at the shoulder 35 of the housing 1 of the electric spindle. The resulting set is fixed in the housing 1 of the electric spindle with split ring 36. The sleeve 10 wear rubber sealing rings 17, 18 and pressed her to the thrust ring 12. Install end shield 14. Short ferromagnetic rotor of an induction motor is made in the following order. Cylindrical billet rotor machine in which a cylinder drill the Central hole, and evenly spaced holes around the Central. Further, these holes are milled with the purpose of receiving grooves 3 pear shaped. Finally, to the resulting workpiece weld the ends of the cover 22, is equipped with a collet Chuck 24, and the cover 23. The outer surface of the rotor is polished to obtain the necessary geometry and surface roughness. Running the spindle in the following way. When voltage is applied to the coil of the stator 2, the rotor starts to rotate. The air entering the gap 25 with the ends of the bearing, creates a lifting force due to the rotation of the rotor and the difference between the gaps in the upper and lower parts of the bearing, ensuring the Yu maintaining the rotor in a suspended position relative to the stator 2. Air through the filter 30 through the vacuum generated by the fan blades 29, enters the housing 1 of the electric spindle through hole 31, is in the area of the frontal part of the stator winding 2, and the grooves 8 of the slot wedges 5 of the stator core 2 and exits. The cooling air takes heat from the stator core 2 and the coil 4, providing for an acceptable level of heating coil 4 and the stator core 2 and the ferromagnetic short-circuited rotor and thereby providing a permanent clearance of the gas bearing during operation. The work of the asynchronous motor not differ from similar devices. 1. The spindle, comprising a housing, a cavity which is placed laminated stator core, provided with semi-closed slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably placed the rotor, a bearing unit which is configured to gas maintenance, while the spindle is equipped with a clamp for fixing the working tool, wherein the conductors of the winding of each slot of a stator fixed wedge and contact with him dowel insertion, the cross section of which is made to lock the backrest keyed inserts under the wedge groove, and the cross section of the projection corresponds to the cross section of the slot PA is a, moreover, the surface profile of the keyed protrusion of the insert corresponds to the surface of the cylindrical cavity of the stator core, in addition, the surface of the backrest keyed insert along its entire length with longitudinal groove open to the internal cavity of the body of the spindle, made with the possibility of a supply of air into it, in addition, in the cavity of the housing of the electric spindle cylindrical sleeve, the diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, while between the end faces of the stator core and addressed to them the ends of the cylindrical bushings posted by retaining ring, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, provided with a flange covering portion of the outer surface of the bushing, and the thrust ring is made of non-magnetic material and fixed to the stator core, in addition, cylindrical bushings installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, which contacts the collet housing, a face shield and thrust rings provided with sealing rings made with the possibility of the elastic deformation of radially and lengthwise relative to the longitudinal axis of the stator core, in addition, the rotor is constructed with internal cavities, for which he contains with the red hollow shaft and the shell, rigidly fastened to each other at least three equidistant from each other jumpers, made in the form of plates of equal thickness, oriented radially to the longitudinal axis of the rotor, in addition, the ends of the rotor are rigidly bonded to the end caps, such as vacuum diffusion welding, in addition, one of the end caps of the rotor is made of a thickened and provided with a clamp for fixing the working tool. 2. The spindle according to claim 1, characterized in that mates with the shaft and the shell thickness jumpers gradually increases toward the contact with these surfaces. 3. The spindle according to claim 1, characterized in that the rotor is made of a material with high magnetic permeability.
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