CN1215243A

CN1215243A - Shell secondary pole type pipe-shape straight-line induction motor

Info

Publication number: CN1215243A
Application number: CN 97119747
Authority: CN
Inventors: 叶云岳
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 1997-10-22
Filing date: 1997-10-22
Publication date: 1999-04-28

Abstract

The present invention discloses a linear induction motor using case as moving secondary, its primary is built-in, and fixed on the core shaft frame, and its tube-type secondary is sleeved outside of the primary, and its inner wall surface is contacted with ball guide device mounted on the core shaft frame, and can make linear movement along axis. The linear-motor with said invented structure as power device can be extensively used in the machinery equipment making straight-line work, specially in the place producing vertical displacement.

Description

Shell secondary pole type pipe-shape straight-line induction motor

The invention belongs to a kind of linear motor.

Known pipe-shape straight-line induction motor, commonly cylinder type is outside elementary, and secondary interior, its motion mode is nothing more than two kinds: i.e. casing primary fixed, axle collateral motion; Or the axle secondary fixed, the elementary motion of casing.The former is the most frequently used, the latter is rare, make as elementary coil windings motionless, and require casing to move as secondary realization shell, this is a kind of new structure undoubtedly, and the tube-type linear motor of this new construction does not see that as yet the document record is arranged, and existing common cylindrical linear does not possess this structure function.

The purpose of this invention is to provide a kind of elementary interior, outside secondary, and primary fixed, the secondary shell secondary pole type pipe-shape straight-line induction motor of doing straight reciprocating motion is to expand the linear electric motors application scenario.

Shell secondary pole type pipe-shape straight-line induction motor of the present invention, comprise primary and secondary, elementary alternately repeatedly being put by coil windings and iron core forms, feature is that primary fixed is on the mandrel frame, on the mandrel frame elementary two ends at least the one end be provided with the track-type facilities of guiding collateral motion, cast secondary be enclosed within elementary outside, inner wall surface thereof is touched mutually with track-type facilities.Like this, when elementary energising, the secondary guiding by guide rail done straight reciprocating motion.

Be generally and make guide rail have higher precision and stability, track-type facilities preferably adopts ball bearing guide bushing.

Below in conjunction with accompanying drawing the present invention is described in detail.

Fig. 1 is a kind of concrete structure schematic diagram of the present invention;

Fig. 2 is the ball bearing guide bushing schematic diagram;

Fig. 3 is secondary a kind of concrete structure figure of the present invention;

Fig. 4 is secondary another kind of concrete structure figure of the present invention.

With reference to Fig. 1, alternately repeatedly put elementary 2 being fixed on the mandrel frame 1 of forming by coil windings 3 and iron core 4 for one, the 6th, hold-down nut, tighten up with mandrel frame 1 elementary 2 by guide pillar piece 7, the 5th, coil connects lead-in wire, in the illustrated example, be positioned at elementary two ends, on mandrel frame 1 and guide pillar piece 7, track-type facilities 8 has been installed respectively, this track-type facilities is the ball bearing guide bushing that is made of cylinder and the plurality of balls 15 that is embedded in barrel as shown in Figure 2, and secondary 9 of tubular type is enclosed within outside elementary 2, inner wall surface thereof is touched mutually with ball, is led along the axis moving linearly by ball.The secondary of cast can be as shown in Figure 3, is to be enclosed within the conductive tube 12 outer cast shapes that constitute by magnetic conductive cylinder 11, and as the iron copper-clad, the iron alclad also can be as shown in Figure 4, be by annular shape magnetic guiding cycle 13 and annular shape conductive ring 14 alternately repeatedly dress constitute.

Linear induction motor of the present invention can be used three-phase alternating current, also can use single-phase alternating current, and the former realizes that by the mode that changes phase sequence the latter adopts the mode of phase shift to realize.After elementary coil windings energising, just can in the air gap between elementary and secondary, produce the air gap travelling-magnetic-field that moves along rectilinear direction, magnetic field mobile makes secondary generation induced current, the effect of induced current and air-gap field produces electromagnetic push, forms the linear relative movement between elementary, secondary.

The present invention proposes a kind of linear electric motors of new construction, expanded the extensive use of linear electric motors, the linear electric motors of this structure are specially adapted to produce the occasion of vertical displacement.

Claims

1. shell secondary pole type pipe-shape straight-line induction motor, comprise elementary [2] and secondary [9], elementary alternately repeatedly being put by coil windings [3] and iron core [4] forms, it is characterized in that elementary [2] are fixed on the mandrel frame [1], at least the one end is provided with the track-type facilities [8] of guiding secondary [9] motion at two ends that mandrel frame [1] is gone up elementary [2], secondary [9] of cast are enclosed within outside elementary [2], and inner wall surface thereof is touched mutually with track-type facilities [8].

2. by the described linear induction motor of claim 1, the track-type facilities [8] that it is characterized in that being installed on the mandrel frame [1] is the ball bearing guide bushing that is made of cylinder and the plurality of balls [15] that is embedded in barrel.

3. by the described linear induction motor of claim 1, it is characterized in that cast secondary be to be enclosed within the outer cast shape that constitutes of conductive tube [12] by magnetic conductive cylinder [11], or by annular shape magnetic guiding cycle [13] and annular shape conductive ring [14] dress formation repeatedly alternately.