CN202674017U

CN202674017U - Non-balance magnetic bearing

Info

Publication number: CN202674017U
Application number: CN 201220358650
Authority: CN
Inventors: 刘新广
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-24
Filing date: 2012-07-24
Publication date: 2013-01-16
Anticipated expiration: 2022-07-24

Abstract

The utility model discloses a non-balance magnetic bearing, comprising a rotor and a stator, wherein two magnetic conducting rings and an axially-magnetized inner permanent magnet ring are fixedly sleeved at the outer circle of a nonmagnetic rotary shaft sleeve, so that the rotor is formed; the inner permanent magnet ring is clamped between the two magnetic conducting rings; a first tile-shaped permanent magnet, a second tile-shaped permanent magnet, a magnetic conducting tile and a nonmagnetic partition plate are arranged outside an inner permanent magnet circle at intervals; the first tile-shaped permanent magnet and the second tile-shaped permanent magnet are clamped by the magnetic conducting tile; the nonmagnetic partition plate is axially clamped among the first tile-shaped permanent magnet, the second tile-shaped permanent magnet and the magnetic conducting tile; the first tile-shaped permanent magnet and the second tile-shaped permanent magnet are both axially magnetized; the magnetizing direction of the first tile-shaped permanent magnet is opposite to that of the inner permanent magnet ring; the magnetizing direction of the second tile-shaped permanent magnet is same to that of the inner permanent magnet ring; the first tile-shaped permanent magnet, the nonmagnetic partition plate and the second tile-shaped permanent magnet are formed into a cylinder; and a nonmagnetic circular tube is fixedly sleeved at the outer circle of the cylinder, so that a stator is formed. The stator generates a deviated magnetic-action resultant force to the rotor.

Description

The Nonequilibrium magnetic bearing

Technical field

The utility model relates to a kind of magnetic suspension bearing, particularly a kind of Nonequilibrium magnetic bearing.

Background technique

Rotating shaft in the existing equipment usually all use classical mechanical bearing to support, and seldom is finished the full magnetic suspension bearing.Because permanent-magnet suspension bearing can not guarantee the centering requirement of rotating shaft, the load that can not withstand shocks or oscillating load; Electromagnetic type or electromagnet and permanent magnet combined suspending bearing structure are complicated, just and need the complicated control system of configuration one cover can make the rotating shaft running reach satisfied precision and stability, unless specific (special) requirements generally need not.If in machine or the mechanism horizontal rotating shaft is arranged, and the end that this its mechanical bearing of rotating shaft Extension support one side is long is installed with moving runner (such as blast fan, drive wheel, flywheel etc.), then this side mechanical bearing bears one section axle stretching out this mechanical bearing and the downforce of moving runner gravity, and the mechanical bearing of the horizontal rotating shaft II the other end bears the upper top power that subgravity produces.Show such as Fig. 1, the rotating shaft II of machine I is by mechanical bearing III and IV supporting, horizontal rotating shaft II stretches out mechanical bearing III to the right, in its right part moving runner V is installed, if one section gravity that closes with moving runner V that horizontal rotating shaft II stretches out to the right is a, mechanical bearing III bears downforce b, and mechanical bearing IV bears top power c.Pressure b, upper top power c make respectively mechanical bearing III and IV serious wear, and pressure b, upper top power c also make rotating shaft II bear the wearing and tearing of moment of flexure and then aggravation mechanical bearing III and IV, and the life-span is shortened greatly; More discontented is, in this case, has strengthened the friction torque of horizontal rotating shaft II, and energy loss is large.

Summary of the invention

The purpose of this utility model is the defective that overcomes above-mentioned machine horizontal rotating shaft II supporting structure, at the mechanical bearing III of this rotating shaft of machine horizontal rotating shaft II Extension support and the outside of IV the Nonequilibrium magnetic bearing is installed, the gravity a of moving runner V of end that offsets or weaken described horizontal rotating shaft II overhanging one section and this end designs a kind of Nonequilibrium magnetic bearing to the active force that the mechanical bearing III that supports this rotating shaft and IV produce for this reason.

Described Nonequilibrium magnetic bearing is achieved through the following technical solutions:

Show that such as Fig. 3 to Fig. 5 the utility model is made of rotor and stator: show that such as Fig. 1 to Fig. 3 the interior permanent-magnetic clamp 7 that overlaps two magnetic guiding loops 2 of 4 solid cylindrical sleeves and axial charging in non magnetic rotating shaft forms rotor, two magnetic guiding loops 2 clip interior permanent-magnetic clamp 7; Interior permanent-magnetic clamp 7 is made of a domain or is combined into by the polylith magnet; Put tile shape permanent magnet 3 No. one at interior permanent magnetism circle 7 outer septal spaces, No. two tile shape permanent magnets 6, magnetic conductive tile 1, non magnetic dividing plate 8, magnetic conductive tile 1 clips tile shape permanent magnet 3 No. one, No. two tile shape permanent magnets 6, non magnetic dividing plate 8 is vertically by a tile shape permanent magnet 3, No. two tile shape permanent magnets 6, magnetic conductive tile 1 is clipped in the middle, a tile shape permanent magnet 3, No. two tile shape permanent magnet 6 is combined into by domain formation or by the polylith magnet, a tile shape permanent magnet 3, No. two tile shape permanent magnet 6 all magnetizes vertically, but the magnetizing direction of a tile shape permanent magnet 3 is opposite with interior permanent magnetism circle 7, the magnetizing direction of No. two tile shape permanent magnets 6 is identical with interior permanent magnetism circle 7, a tile shape permanent magnet 3, non magnetic dividing plate 8, No. two tile shape permanent magnet 6 forms a cylinder, forms stator at the non magnetic pipe 5 of described cylinder solid cylindrical sleeve.

The rotating shaft cover 4 of described rotor is enclosed within will be by on the horizontal rotating shaft of its supporting, make non magnetic dividing plate 8 thickness splits be in the horizontal plane at described Nonequilibrium magnetic bearing horizontal diameter place, then stator is fixed in support or frame, like this, stator is made a concerted effort non-vanishing and very large to the magnetic that rotor produces up or down, this magnetic makes a concerted effort to be called non-equilibrium magnetic force, and stator the magnetic of other direction of rotor is made a concerted effort is zero.

The effect that the utility model is useful is:

1. because the stator of Nonequilibrium magnetic bearing is made a concerted effort very large to the magnetic that rotor produces up or down, the horizontal rotating shaft that is used for the supporting machine, can weaken or resist the sagging power of sled of an end of horizontal rotating shaft, and the upper prying force that weakens or suppress the horizontal rotating shaft the other end, so can slow down or eliminate the infringement that gravity produces mechanical bearing on the horizontal axis of closing of moving runner on machine horizontal axis beam type overhanging one section and this section axle shaft end, the prolonged mechanical bearing life, greatly reduce the horizontal rotating shaft friction torque, reduce energy loss.Use described Nonequilibrium magnetic bearing can greatly reduce wind-driven generator horizontal rotating shaft friction torque, also just can greatly reduce detent torque, realize breeze wind, take full advantage of wind resource, improve generating efficiency.The axle that described Nonequilibrium magnetic bearing is used for supplemental support horizontal type generator (such as the steam turbine generator in thermal power plant) can improve generating efficiency greatly.

Utilize the rotating shaft of Nonequilibrium magnetic bearing supplemental support any direction, its Nonequilibrium magnetic can overcome rotating shaft with joint efforts to the eccentricity pressure of original bearing, reaches greatly to reduce friction, and reduces energy loss, prolongs original bearing life.

2. described Nonequilibrium magnetic bearing structure is simple, manufacturability is good, non-maintaining, the life-span is long.

3. described Nonequilibrium magnetic bearing energy-saving and environmental protection.

Description of drawings

Fig. 1 is a kind of scheme of installation of background technique explanation or described Nonequilibrium magnetic bearing;

Fig. 2 is the another kind of scheme of installation of described Nonequilibrium magnetic bearing;

Fig. 3 is the structural representation of described Nonequilibrium magnetic bearing;

Fig. 4 is left view or the right elevation of Fig. 3;

Fig. 5 is the A-A sectional drawing of Fig. 4.

Embodiment

Embodiment 1:

Show such as Fig. 1, described Nonequilibrium magnetic bearing is installed described Nonequilibrium magnetic bearing VI in the side of the mechanical bearing III of this rotating shaft of machine horizontal rotating shaft II Extension support, and it is offset the magnetic force e of horizontal rotating shaft II and d or weakens active force b and the c that the gravity a of moving runner V of the end of described horizontal rotating shaft II overhanging a section and this end produces the mechanical bearing III that supports this rotating shaft and IV.

Show such as Fig. 2, described Nonequilibrium magnetic bearing is respectively installed a described Nonequilibrium magnetic bearing VI at the mechanical bearing III of this rotating shaft of machine horizontal rotating shaft II Extension support and the outside of IV, and its magnetic force e, d to horizontal rotating shaft II, f, g offset or weaken active force b and the c that the gravity a of moving runner V of the end of described horizontal rotating shaft II overhanging a section and this end produces the mechanical bearing III that supports this rotating shaft and IV.

Claims

1. Nonequilibrium magnetic bearing, it is characterized in that: be made of rotor and stator: the interior permanent-magnetic clamp (7) at non magnetic rotating shaft cover (4) two magnetic guiding loops of solid cylindrical sleeve (2) and axial charging forms rotor, and two magnetic guiding loops (2) clip interior permanent-magnetic clamp (7); Interior permanent-magnetic clamp (7) is made of a domain or is combined into by the polylith magnet; Septal space is put a tile shape permanent magnet (3) outside interior permanent magnetism circle (7), No. two tile shape permanent magnets (6), magnetic conductive tile (1), non magnetic dividing plate (8), magnetic conductive tile (1) clips a tile shape permanent magnet (3), No. two tile shape permanent magnets (6), non magnetic dividing plate (8) is vertically by a tile shape permanent magnet (3), No. two tile shape permanent magnets (6), magnetic conductive tile (1) is clipped in the middle, a tile shape permanent magnet (3), No. two tile shape permanent magnets (6) consist of by a domain or are combined into by the polylith magnet, a tile shape permanent magnet (3), No. two tile shape permanent magnets (6) all magnetize vertically, but the magnetizing direction of a tile shape permanent magnet (3) is opposite with interior permanent magnetism circle (7), the magnetizing direction of No. two tile shape permanent magnets (6) is identical with interior permanent magnetism circle (7), a tile shape permanent magnet (3), non magnetic dividing plate (8), No. two tile shape permanent magnets (6) form a cylinder, form stator at the non magnetic pipe of described cylinder solid cylindrical sleeve (5).