CN2454584Y

CN2454584Y - Integrated micro-end-face magnetic suspension bearing

Info

Publication number: CN2454584Y
Application number: CN 00264466
Authority: CN
Inventors: 贾宏光; 吴一辉; 梁静秋; 王淑荣
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2000-12-06
Filing date: 2000-12-06
Publication date: 2001-10-17
Anticipated expiration: 2010-12-06

Abstract

The utility model discloses an integrated micro-end-face magnetic suspension bearing which belongs to the bearing class of a mechanical field and relates to the improvement of a traditional end-face magnetic suspension bearing. The integrated micro-end-face magnetic suspension bearing is composed of two identical sets of structure which respectively comprise iron cores, coils, a base, and a magnetic conductor. The two sets of structure are arranged relatively, and a magnetic conducting working object is arranged between the two sets of structure. One side of a body of the base is uniformly distributed and prepared with concave grooves which are identical to the iron cores and the coils in radial shape, and a plurality of groups of iron cores and a plurality of groups of coils are arranged inside the concave grooves arranged on the body of the base. One side of the magnetic conductor is fixedly connected with the other side of the base. The external diameter of each iron core is provided with the coils according to a certain distance, and the coils are lined in the radial direction of the iron cores. The coils and the iron cores are integrated on one base, so that the micro-end-face magnetic suspension bearing has high integrity and small volume.

Description

A kind of integrated miniature-end face magnetic suspension bearing

The mechanical field bearing class that belongs to of the present utility model relates to a kind of improvement to traditional end face magnetic suspension bearing.

The end face magnetic suspension bearing is mainly used in the axially locating of rotor of machine rotating at high speed.The structure of the end face magnetic suspension bearing that generally adopts both at home and abroad includes as shown in Figure 1 at present: iron core 1, coil 2, position transducer 3 and target 4 are formed, and its various piece is assembled by single part.Its working principle is: the axial position of position transducer perception target, difference according to the position, according to certain algorithm, pass to certain electric current in the coil, under this faradic effect, iron core produces certain attraction force to target, makes target move to correct position (generally being the neutral position).Because iron core, coil and the position transducer of present end face magnetic suspension bearing all separate, then cost is higher, and volume is bigger.

The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of level of integration height is provided, the miniature-end face magnetic suspension bearing that volume is little.

Overall structure of the present utility model such as Fig. 2, shown in Figure 3, form by two groups of identical iron cores 1, coil 2, substrate 3, magnet case 5 structures, two groups of structures are staggered relatively, between two groups of structures, be equipped with the target 4 of magnetic conduction, on a side of substrate body, prepare the groove identical with iron core and coil by radial even distribution, many group iron cores and many group coils place in the groove on the substrate body, fixedly connected with the another side of substrate in the side of magnet case, press the certain distance positioned coil on the external diameter of iron core, coil is arranged in the radial direction of iron core.

Working principle of the present utility model is: suprabasil any one group of iron core and coil, or arbitrarily adjacent two groups of iron cores and coil constitute inductance displacement sensor, the relative position of perception target, difference according to the axial position of institute's perception, according to certain algorithm, in two suprabasil other coils, pass to certain electric current, to the axial position corresponding attraction force of target generation with the inductance displacement sensor perception; Make target remain on the neutral position that had both remained essentially in two groups of structures on certain position.

Good effect of the present utility model: because coil, iron core and inductance displacement sensor are all integrated in a substrate, so it is low to overcome in the prior art level of integration, manufacture cost height, the shortcoming that volume is bigger.Provide a kind of level of integration height, the miniature-end face magnetic suspension bearing that volume is little.

Description of drawings:

Fig. 1 is the prior art structural drawing

Fig. 2 is a structural drawing of the present utility model

Fig. 3 is that the utility model A is to sectional view

Embodiment of the present utility model such as Fig. 2, Figure 3 shows that: iron core 1, coil 2, substrate 3, magnet case 5.Iron core 1 adopts permally, uses the micromechanical process electroforming above substrate 1 or its inside grooves.Coil 2 adopts copper, uses the micromechanical process electroforming above substrate 1 or inside grooves.Substrate 3 can be adopted silicon chip, if iron core 1 and coil 2 are upwards growths, substrate 3 also can be adopted glass sheet, and loop configuration is adopted in substrate 3.Target 4 adopts annular or circular magnet case.Magnet case 5 can adopt electrical pure iron or A3 steel.If the utility model is placed on the end of rotor, substrate 3 and magnet case 5 can be other shapes, and coil also can adopt other arrangement modes such as matrix.

Claims

1, a kind of integrated miniature-end face magnetic suspension bearing, it comprises: iron core 1, coil 2, it is characterized in that: by two groups of identical iron cores 1, coil 2, substrate 3, magnet case 5 structures are formed, two groups of structures are staggered relatively, between two groups of structures, be equipped with the target 4 of magnetic conduction, on a side of substrate 3 bodies, prepare the groove identical with iron core 1 and coil 2 by radial even distribution, many group iron cores 1 and many group coils 2 place in the groove on substrate 3 bodies, fixedly connected with the another side of substrate 3 in the side of magnet case 5, press certain distance positioned coil 2 on the external diameter of iron core 1, coil 2 is arranged in the radial direction of iron core 1.