35results about How to "Improve the radial bearing capacity" patented technology

The invention discloses a radial-axial three-degree-of-freedom alternating current-direct current hybrid magnetic bearing used for non-contact suspension bearing. An axial control coil is arranged between a radial stator core and an axial stator core; an axial air gap is formed between the axial stator core and the end face of a rotor in the axial direction; three same stator core magnetic poles uniformly distributed in the circumferential direction extend from the wall of an inner cavity of the radial stator core to the axle center; same radial control coils are wound on the three stator core magnetic poles, and radial air gaps are formed between the stator core magnetic poles and the outer wall of the rotor in the radial direction; same axially magnetized annular permanent magnets are arranged between two axial sides of the radial stator core and the axial stator core; and S poles of the permanent magnets face the radial stator core, and N poles of the permanent magnets face the axial stator core. The radial-axial three-degree-of-freedom alternating current-direct current hybrid magnetic bearing integrates axial and radial functions, is only driven by a three-phase alternating current power inverter, is provided with two axially magnetized annular permanent magnets, controls the magnetic flux not to pass magnetic poles where the permanent magnets are positioned, and has the advantages of low power consumption, small volume, light weight and high bearing capacity.

The invention provides an air bearing system for supporting micro-rotors with a high rotation speed and small length-diameter ratio. The system comprises a miniature centripetal turbine rotor, radial air bearings, a front anti-thrust air bearing, a rear anti-thrust air bearing and a matched air path system, wherein the miniature centripetal turbine rotor is driven by radial incoming flow to rotate at a high speed; the radial air bearings are four ways of independent air-supply double-row throttling seam radial air bearings; the anti-thrust air bearings are in a static and dynamic pressure combined mode; the static-pressure anti-thrust bearing acts during starting and low-speed rotation; the spiral groove dynamic-pressure anti-thrust bearing acts during high-speed rotation. The miniature air bearing system is simple in structure and high in deflection rigidity, provides enough supporting height and stability for ultra-high rotation speed work while guaranteeing stable low-speed starting of the micro-rotors, and can provide supporting for the various micro-rotors with the high rotation speed and small length-diameter ratio in multiple fields.

The invention discloses a four-degree-of-freedom hybrid excitation starting / power generation integral bearingless switched reluctance motor. The four-degree-of-freedom hybrid excitation starting / powergeneration integral bearingless switched reluctance motor consists of two dual-stator motors with same structure in coaxial connection in the axial direction; torque windings are wound on outer stator teeth of the two dual-stator motors respectively; suspension windings are wound on inner stator teeth of the two dual-stator motors; the two dual-stator motors share the same rotor and the same rotating shaft; a circular ring-shaped permanent magnet sleeving the outside of the rotating shaft is fixedly connected between stator yoke parts of two inner stators of the two dual-stator motors, and the permanent magnet is axially magnetized. Integral operation of starting and power generation is realized, a suspension current magnetic circuit and a torque current magnetic circuit are of mutual independence without interference in the rotor, and the two motor torque windings are serially connected together, so that the application of a controller is reduced.

The invention provides a design method of a cross cylindrical roller bearing with two right-angle roller paths. An outer ring (1) is designed in an integral structure by a split type dual-half structure. The outer ring comprises two right-angle roller paths, an outer mounting hole (1.1), an outer hoisting thread hole (1.2), a lubricating oil hole (1.3), a plunger (6) and a conical pin (7). An inner ring comprises two right-angle roller paths, an inner mounting hole (2.1) and an inner hoisting thread hole (2.2). A cylinder roller (3) and an isolation block (5) are configured in the corresponding roller paths of the inner ring and the outer ring. Sealing is carried out through a sealing assembly (4), so that the problems of a plurality of machining processes, poor mounting condition, poor sealing, no lubrication and the like in a cross cylindrical roller bearing with a single roller path can be solved. Therefore, the axial bearing force and the overturn moment can be ensured, and simultaneously the radial bearing force is greatly improved.

The invention discloses a radial hybrid magnetic bearing of a slice rotor. The radial hybrid magnetic bearing is characterized in that the slice rotor is sleeved with a radial stator disc in a hollow manner, and the radial stator disc is composed of a radial stator cylinder and three radial stator pieces, and the three radial stator pieces are successively fixed on the inner wall of the radial stator cylinder along the axial direction; a first axial cavity is arranged between a first radial stator piece and a second radial stator piece, a second axial cavity is reserved between the second radial stator piece and a third radial stator piece, and radial control coils are arranged in the two axial cavities; the slice rotor is composed of a rotor magnet yoke and a permanent magnet, the rotor magnet yoke is coaxially closely nested outside the permanent magnet, and the permanent magnet is of a hollow cylinder shape and is radially filled with magnetism; the permanent magnet provides static bias flux, the radial control coils provide radial control magnetic flux, and the radial control magnetic flux and the static bias flux are overlapped at radial gaps. The radial hybrid magnetic bearing provided by the invention has the advantages that a radial magnetism filling permanent magnet is adopted, the spaces of the radial control coils are reduced, and the radial bearing capacity is increased.

The invention relates to a rolling needle lead screw. The rolling needle lead screw comprises a lead screw and a slide sleeve, wherein the slide sleeve coats the lead screw, and has a slide hole; the slide sleeve comprises multiple travel roller mechanisms and multiple support roller mechanisms arranged along the inner wall of the slide hole; the support roller mechanisms comprise multiple rotating grooves arranged along the inner wall of the slide hole in an array form; rolling columns A are rotationally embedded in the rotating grooves; one sides of the rolling columns A are embedded in a spiral groove of the lead screw; the travel roller mechanisms comprise an annular slide groove formed in the slide sleeve; multiple rolling columns B are embedded in the slide groove; an opening communicated with the slide hole is formed in the slide groove; the rolling columns B are contacted with the spiral groove of the lead screw through the opening; the travel roller mechanisms comprise transparent support rings arranged on the annular inner wall of the slide groove; and the middle parts of the transparent support rings are fixed with a laser displacement sensor for monitoring the moving speed of an array of the rolling columns B.

The invention discloses a one-dimensional micrometric displacement device, and relates to a micrometric displacement device, solving the problems of small radial stiffness of a flexible hinge, small radial bearing capacity and difficulty of accurately controlled output of the existing micrometric displacement device. The connecting shaft of the one-dimensional micrometric displacement device is positioned in a working hole of a base; a front strain gage and a rear strain gage are arranged in parallel; a first inner ring and a second inner ring are respectively fixed in shoulders at two ends of the connecting shaft; a front end cover and a rear end cover are respectively connected with the shoulders of the connecting shaft through the first inner ring and the second inner ring; the first inner ring and the second inner ring are respectively fixed at two ends of the base; and the second inner ring is fixedly connected with the rear end cover. The device of the invention can be widely applicable to the occasions in ultra-precision finishing for provision of error compensation, precise microscale feed and the like.