RussianPatents.com

Spindle. RU patent 2370344.

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly to spindles with built-in motors and magnetic bearings, and can be used incorporated with machine tools, centrifuges and various centrifugal plants. Proposed spindle comprises housing, motor, hollow shaft, unit of magnetic bearings (UMB) and safety bearings running on axle fitted inside the shaft, attached to spindle end face and furnished with damper representing a disk and elastomer ring. UMB is arranged at the hollow shaft output area plugged on the side of operating tool.

EFFECT: simpler design, higher reliability.

5 cl, 5 dwg

IPC classes for russian patent Spindle. RU patent 2370344. (RU 2370344):

F16C32/04 - using magnetic or electric supporting means

B24B41/04 - Headstocks; Working-spindles; Features relating thereto

B23B19/02 - Working-spindles; Features relating thereto, e.g. supporting arrangements (B23B0013000000 takes precedence);;

Another patents in same IPC classes:

Device for electromagnetic unloading radial bearings / 2357121
Present invention pertains to electrical engineering, particularly to devices for electromagnetic unloading bearings and magnetic levitation. The device for electromagnetic unloading radial bearings has a stator in form of a magnetic core (1) with a central pole terminal (2), with an exciting coil (8) and a cylindrical working surface, two pairs of diametrally opposite side pole terminals (3, 4, 5, 6), which have generator coils (9, 10, 11, 12) and working surfaces with teeth, made with relative shift of teeth in the pairs of half the space between the teeth, and a pole terminal with a permanent magnet (7). The rotor is made in form of a ferromagnetic ring (14), fitted on a shaft (13) and with teeth on its surface, facing the working surfaces of the stator pole terminals, with spacing coinciding with the spacing of the teeth of side stator pole terminals. Generator coils (9, 10, 11, 12) are connected in series accordingly and form two pairs of coils, which are joined head-on and connected to the input of a rectifier. The output of the rectifier is connected to the exciting coil (8) of the central pole terminal (2) and a capacitive filter.

Upper magnetic support of gas centrifuge rotor / 2355478
Invention deals with engineering industry, it refers to the upper magnetic support structure of vertical fast-running rotors. Upper magnetic support of gas centrifuge rotor with central gas collector includes ring axially magnetised magnet installed on casing cover, polar tip and ferromagnetic bushing located in alignment on rotor opposite to magnet end face. Pole tip is installed on collector base surface in relation to which upper sampler pipe outreach is set.

Method of operation of bearing assembly and bearing assembly / 2347960
Invention relates to machine building and can be used, primarily, in machines and appliances with rotary parts. Method of operating the external-seal-pressurisation bearing assembly consists in providing surplus electromagnetic force increasing the bearing capacity of the proposed bearing assembly. Note that the said electromagnetic force is produced due to interaction of magnetic fields of the solenoid and magnet fitted in the said bearing assembly. The invention describes also the bearing assembly incorporating a shaft running in gasostatic bearing, a chamber arranged in the bearing housing and holes made in the bearing bushing. Note that the proposed assembly comprises additionally a solenoid fitted on the shaft and, at least, more that one magnet located between the bearing bushing holes.

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.

Method of rotor vibration damping and magnetodynamic bearing-damper / 2328632
Method of damping rotor vibrations consists in decreasing vibration amplitude by applying pulses of force directed opposite to the rotor deflection. Force pulses are generated by interaction of alternating space-variable magnetic field, or by electromagnetic field with a fixed source. Within the space nearby the rotor, at least, one high electric conductivity, including superconductivity, or high thermal conductivity element, or diamagnetic substance is arranged. The interaction pulse size is adjusted for every particular case depending upon vibration amplitude by the number of alternating field cycles and magnetic clearance size between the field source surfaces and the said high electric conductivity, including superconductivity, or high thermal conductivity element, or diamagnetic element. The invention proposes also a magneto dynamic bearing, a damper, incorporating a magnetic system with alternating magnetic field induced by a permanent magnet or an electric magnet, on the one hand, and on the other hand, a rotor or stator system made from the material featuring a high electric conductivity, or superconductivity, including super thermal conductivity. Here, the field magnetisation cycle or step-to rotor vibration amplitude ratio exceeds 1 at the equidistant with eccentricity equal to 0, while the rotor vibration amplitude-to-magnetic clearance ration below 0,8.

Plain bearing assembly made up of permanent magnets with vertical rotary shaft / 2328630
Invention relates plain bearing designs incorporating in permanent magnets with vertical shafts used in machine tools, electric generators, vehicles, construction engineering, chemical industry etc. The said bearing assembly contains a fixed housing and a base with mounting holes. The housing consists of three parts, one of them being jointed to the other one by thread provided at the point of joint, the other two being fastened together. The assembly incorporates also magnets on the housing inner surfaces, the base with mounting holes, a movable vertical shaft with magnets on its surface arranged at the centre of the housing cavity, the shaft upper end being free. It also has a housing end face cover with outer thread on its flange and central bore for the shaft free end to extend there from, an annular magnet on the housing cover inner surface with aligned holes. A disk is attached to the shaft lower end face, the edge of which is rigidly attached to the tape ring inner side accommodating the magnets on its outer side. The disk upper and lower surfaces accommodate the magnets.

Bearing on magnetic suspension / 2314443
Invention relates to bearings on magnetic suspension which can be used in different industries. Proposed bearing on magnetic suspension has ring coaxial permanent magnets. Outer magnet is made stationary and inner magnet is installed on axle. Magnets are pointed to each other by nonshielded surfaces. Bearing is furnished with additional ring permanent magnet installed on axle and pointed by nonshielded pole to like nonshielded end pole of stationary ring magnet. Magnets are made with axial magnetization. Ratio of mass of each of permanent magnets installed on axle to mass of stationary permanent magnet is 1:4. Magnets are installed with air clearance between working surfaces equal to 0.1-0.5 mm.

Method of and device to reduce friction coefficient in sliding bearings / 2311571
Invention relates to method and device to reduce friction coefficient in sliding bearings used in machine tools and other mechanisms, in conveyors for raw materials and finished products. According to invention, sliding is effected, without lubricating materials, between remote layers of air by forming compressed magnetic fields of installed permanent magnets. Magnetic are installed with like poles opposite to each other at air gap of 0.1 l ÷ 0.6 l where l is distance of beginning of zero reaction of permanent magnets and simultaneously fixed arrangement of movable part of sliding bearing is provided owing to magnetic repelling forces. Device is provided which has fixed housing 1 with base 3 and with inner thread on end to turn on end face covers 7, 9. Permanent magnets 2 are located on inner surface of housing 1, and base is found from outside. Movable axle 4 is made in center of space of housing 1. Permanent magnets 5 are mounted on surface of axle 4, and solid permanent magnet 6 is located on its end face. Device contains cover 7 with outer thread on its flange and with solid permanent magnet 8 on its inner surface in center to stabilize cover on base 3. Ring permanent magnet 10 is located on inner surface of cover 9 with outer thread on its flange and with round hole in center to pass free end of axle 4.

Sliding bearing manufacturing method / 2310776
Invention relates to technology of manufacture of laminated articles by winding and it can be used in manufacture of sliding bearings. Proposed method includes application of polymeric composition onto inner cylindrical part and flange in form of coating by filling clearance between flange and template by winding on cord impregnated with polymeric composition in layers with subsequent shaping and hardening of polymeric composition, removing of template and mechanical machining of coating. Prior to winding on cord, sliding bearing and template are slide-fitted on one axle to form clearance between flange and template. Winding of cord is carried out directly onto axle which is removed after hardening of polymeric composition.

Support / 2307266
Invention can be used for creating noncontact supports. Proposed support contains fixed magnetic device and movable member. Magnetic device is made in form of magnetic belts with radial magnetization spaced along movable member, and movable member is provided with magnetic belt with radial magnetization arranged between magnetic belts of fixed magnetic device which permits its arrangement at least partially in zone of weakened magnetic field, thus providing power axial and radial fixing of movable member in support.

Spindle rotating apparatus / 2245225
Apparatus includes supports of spindle mounted in housing and unit for enhancing accuracy of spindle rotation. In order to improve accuracy of rotation mode, front supports of spindle are in the form of two radial thrust bearing assemblies. Unit for enhancing rotation mode accuracy is in the form of ring mounted between said radial thrust bearing assemblies and having piezoelectric members to plates of which electric current is supplied from power source. Height of piezoelectric members exceeds thickness value of ring by several micrometers. Electric current intensity and number of piezoelectric members are selected depending upon value of additional interference created in radial thrust bearing assemblies.

Spindle / 2370344
Invention relates to machine building, particularly to spindles with built-in motors and magnetic bearings, and can be used incorporated with machine tools, centrifuges and various centrifugal plants. Proposed spindle comprises housing, motor, hollow shaft, unit of magnetic bearings (UMB) and safety bearings running on axle fitted inside the shaft, attached to spindle end face and furnished with damper representing a disk and elastomer ring. UMB is arranged at the hollow shaft output area plugged on the side of operating tool.

Device for fixation of spindle in metal-cutting equipment of various purpose / 2386518
Device is intended for control of spindle mechanism in the form of rotary spindle with pulley for drilling-milling-boring works, fixed spindle for turning works and replacement of tool, and comprises body and pins for fixation of spindle. In order to expand technological resources, it is equipped with plank, on which pins are installed, pneumatic cylinder intended for movement of plank with pins, pusher and spring for return of pusher and pins. At the same time pins are intended for interaction with slots arranged on pulley installed on spindle.

Spindle unit and procedure for adjusting frequency of its self-oscillations / 2396147
Unit consists of hollow spindle rotating in two - front and back - bearing supports, of tooth gear mounted on hollow spindle between supports nearer to front one, and of nut connected by thread with external surface of spindle. To extend functionality of a machine the unit is equipped with a bushing put on the hollow spindle between the supports. With its one end the bushing interacts with the end of the tooth gear, while with another end it interacts with the nut. Also thread on the hollow spindle for connection with the nut is made at direct vicinity from the back support. Length of the bushing is less than difference between distance form the end of the tooth gear to the end of the back support. Height of the nut equals to a value of a gap between the end of the nut and the end of the back support.

Spindle device for machining / 2464129
Invention relates to machine building, particularly, to metal working machine tools. Proposed spindle device comprises housing, drive shaft with system for locking it required angular operating position and automatic tool replacement means. Aforesaid system is arranged between shaft bearings, nearby front bearings, and made up of friction and thrust discs and friction disc locking means. Thrust disc is rigidly fixed on housing while friction disc is arranged between thrust disc and its locking means and rigidly fixed on said shaft. Friction disc locking means is arranged on spindle housing to reciprocate thereon.

Spindle assembly / 2465986
Spindle assembly includes hollow spindle coaxially located inside bearing assemblies and mounted in thrust ball bearing with preload device for thrust bearings and radial thrust roller bearing, internal ring of which contacts spindle surface along cone surface and pressed by bush coaxial the spindle via nuts. Assembly is equipped by cover with labyrinth sealing located perpendicular spindle axis for pressing internal ring of radial thrust roller bearing and preload device located in spindle front support for compensation of its parts wear. In order to achieve the same technical result the other version of spindle assembly includes hollow spindle coaxially located inside bearing assemblies and mounted in thrust ball bearing with preload device for thrust bearings and radial thrust roller bearing performed in a form of hydrostatic support containing housing in a form of cylindrical bush embracing the spindle that has, at least, three hydraulic radially located elements, each of which consists of coaxially arranged inlet and pocket interacting with spindle via oil wedge, and between housing neck and spindle external surface there are radially arranged outlets made in housing in quantity equal to the quantity of hydraulic radially arranged elements. Pockets are made in a form of cavities, for example round or non-round holes that are connected through throttle and filter with supply main with pump located in oil bath.

Spindle assembly automatic balancer / 2467836
Proposed device comprises adjusting disc aligned with spindle and rigidly secured thereto and provided with unbalance means, cover and hydraulic system to feed liquid-phase medium to adjusting disc. Besides, it comprises special-design system to measure spindle deflection composed of proximity displacement transducer, amplifier, data processing and transfer means, and hydraulic oil feed pump. Note here that said transducer is arranged on spindle side surface while adjusting disc is furnished with disc-type unbalance slide valve. Note also that unbalance means are composed of, at least, four elastic vessels arranged regularly along the circle in annular groove made on adjusting disc side surface. Oil feed assembly may be composed of ring with groove on inner surface arranged to embrace spindle surface.

High-speed spindle / 2468895
Invention relates to machine building, particularly, to spindles of high-speed machine tools. Proposed spindle runs in magnetic bearings fitted on shaft and is composed of a unit made up of two passive magnetic bearings with inner and outer races shifted relative to each other, and hybrid magnetic thrust bearing consisting of tapered permanent magnet and electromagnet. Note here that aforesaid shaft is solid.

Method of control over metal cutter high-rpm direct drive spindle motor / 2509627
Proposed method comprises fitting the spindle in machine spindle assy housing and clamping by flange to run in front and rear bearing assemblies. Note here that channels are made in said housing and flange to coo down spindle assy elements. To increase service life, temperature is additionally controlled by temperature transducers arranged nearby bearing outer races. Vibration is controlled by vibration gage arranged in the housing nearby spindle front bearing assy. Spindle axial displacement is controlled by appropriate pickup arranged at spindle front end. Readings of said transducers are used to cur off drive motor in due time in case allowable load falls beyond tolerances.

Torque transfer from motor shaft to machine tool spindle / 2515618
Proposed gearing comprises motor shaft to transmit torque to machine tool spindle. Note here that motor shaft has a through bore to accommodate said spindle to it to reciprocate on its axle. Said axle is furnished with keys to lock said spindle thereon and key retainer bush fitted on motor shaft and locked by external concentric ring.