CN2068732U

CN2068732U - Pipe type linear motor

Info

Publication number: CN2068732U
Application number: CN 90208510
Authority: CN
Inventors: 张义儒; 董云增; 程绍先; 卢文玉; 程绍平
Original assignee: BEIJING COLLEGE OF COAL MANAGEMENT CADRE
Current assignee: BEIJING COLLEGE OF COAL MANAGEMENT CADRE
Priority date: 1990-06-14
Filing date: 1990-06-14
Publication date: 1991-01-02

Abstract

The utility model discloses a pipe type linear motor, which is mainly characterized in that the iron-core of the primary stage of the pipe type linear motor is composed of an axial direction strip laminated core and an annular laminated core which are assembled together; a secondary stage is composed of an iron-core with a spiral groove, and a conductive body and the connecting piece of the conductive body which are embedded in the iron-core. The structure of the utility model simplifies the process, also enhances the heat-sinking capability, obviously cuts down the heat productivity, solves the problem of temperature rising of the motor and enlarges the application range. Thus the utility model can be used as a propelling power device for the mining industry of a poor operating condition which requires great thrust force and frequent startup.

Description

Pipe type linear motor

The utility model relate to a kind of because object and the magnetic field of advancing along a path between mutual electromotive action, and make the propulsion system of rigid body along this path movement, specially refer to a kind of linear motor.Be particularly useful for that requirement thrust is big, starting is frequent, the mining industry of working condition difference, can be used as power plant.

In prior art, the typical structure of tubular linear motor is by elementary iron core, elementary winding, the secondary composition.Its elementary iron core is made up of some monoblock spill ordinary steels or silicon steel garden ring steel disk usually; The coil winding of elementary winding becomes the garden annular, during assembling steel disk and coil is stacked alternately, and clamps with stud; It is secondary generally to be with a thick walled steel tube, in order to improve the dynamicthrust that unit volume produces, can outside steel pipe, cover 1～2 millimeter copper sheet of one deck or aluminium skin in the garden, perhaps on steel pipe, set copper ring, aluminium ring, become composite secondary and (see " linear asynchronous motor ", China Machine Press, in April, 1979, the 159th page).This tubular linear motor is simple in structure, processing easily, but, elementary iron core makes because being some monoblocks garden ring steel disk, eddy current loss is big, electric efficiency is low, heating problem is more serious, in addition because reasons in structure, radiating condition is poor, thereby the electric machine temperature rise problem is bigger, its electromagnetic load can only be got lower numerical value, so above-mentioned tubular linear motor can only be used in the thrust less (general thrust is only following for several hectonewtons) and the occasion of Fraquent start (load factor is lower) not.

In order to overcome above-mentioned shortcoming, in prior art, developed the tubular linear motor that elementary iron core is a lamination again, its elementary iron core is divided into some bundles along garden Zhou Junbu (as being divided into six bundles), on every bundle lamination identical tooth and groove is arranged, and loop coil is embedded in the groove.Laminated core structure like this is complicated, and particularly the assembly technology difficulty is big.

The purpose of this utility model is in order to overcome the deficiency of above-mentioned prior art, a kind of novel electric motor structure is proposed, can simplify the processing and the assembly technology of primary and secondary, solve the problem of temperature rise of the tube-type linear motor of high thrust, make this motor be able to wider applying.

The elementary iron core of this motor of major technique measure of the present utility model is made of axial bar shaped laminated core and radial ringed laminated core combination, it is secondary to be by the garden steel pipe that spiral grooves and axial groove are arranged on the outer surface or the garden iron and steel heart, and be embedded with secondary conductor in spiral grooves, be embedded with the secondary conductor connector at axial groove and constitute.The purpose of this utility model can also reach by following technical measures, between the elementary bar shaped laminated core that the axial space of being separated by is placed, can form the axial wind ditch that ventilates, and also has air vent hole or air drain and axial wind ditch to be connected on casing; Secondary some joints that can be connected by screw thread be formed as 3～10 joint short steel pipes, also can save short steel pipes by the some joints that are connected with screw thread of copper sheathing or aluminium cover as 3～10 by hot charging and form.

The utility model is compared with prior art has tangible technique effect: one: the eddy current of primary and secondary obviously reduces, and caloric value also reduces greatly.Its two: the axial wind ditch that between elementary bar shaped laminated core, forms, can be used for carrying out forced ventilation, the ventilation hole on axial wind ditch and the casing, ventilation ducts is connected, and the primary coil outer surface directly is exposed in the axial wind ditch, thereby improved heat-sinking capability greatly.Its three: the simple for assembly process easy row of elementary iron core and primary coil, thus can ensure the quality of products effectively.Because the utility model has solved this crucial difficult problem of temperature rise, thereby make this motor can satisfy the requirement of Fraquent start and high thrust, opened path for tubular linear motor enlarges the scope of application.

Description of drawings of the present utility model is as follows:

Fig. 1, the vertical cut-away view of tubular linear motor

Fig. 2, the horizontal cut-away view of tubular linear motor

Among the figure: 1, axially bar shaped laminated core; 2, radial ringed laminated core; 3, primary coil; 4, fixture unshakable in one's determination; 5, bearing shell; 6, end cap; 7, casing; 8, secondary iron core; 9, secondary conductor; 10, secondary conductor connector; 11, air gap; 12, axial wind ditch; 13, air drain.

Now in conjunction with the accompanying drawings embodiment of the present utility model is further described.With reference to Fig. 1, Fig. 2, this tubular linear motor is that 3000 newton design by thrust.The elementary iron core of this machine is made up of 4 axial bar shaped laminated cores 1 and radial ringed laminated core 2.Bar shaped laminated core 1 evenly distributed along garden week, and be fixed on the inwall of casing 7, radial ringed laminated core 2 and primary coil 3 be stacked alternately by 4 axial bar shaped laminated core 1 formed in the garden, with fixture 4 unshakable in one's determination radial ringed laminated core 2 is compressed then and fixing.Because axially bar shaped laminated core, be that evenly place at the 90 ° of angles that are separated by along garden in the casing, can form the axial wind ditch 12 of ventilating therebetween, and the surface, outer garden of radial ringed laminated core 2 and primary coil 3 can be connected by direct and axial wind ditch 12, thereby improved radiating effect.Simultaneously, on garden shape casing 7, also can have air drain 13 and communicate, can further strengthen result of ventilating heat dissipation with axial wind ditch 12.Secondary unshakable in one's determination 8 of this linear motor be one long 4 meters, diameter is 120 millimeters a garden steel pipe, certain secondary iron core also can be by long 0.5 meter of every joint, diameter is that the garden steel pipe that 120 millimeters 8 joint screw threads are connected is formed.On the surface, outer garden of this root garden steel pipe, process the square spiral groove, its pitch is 4 millimeters, and on the steel pipe of garden, leave an axial groove, be embedded in copper bar conductor 9 in spiral grooves, be embedded in copper bar conductor adapting piece 10 at axial ditch, and the copper bar conductor 9 of each pitch is connected with copper bar conductor adapting piece 10, so that the copper bar conductor 9 in the spiral grooves all can constitute a closed-loop path in each pitch.On secondary unshakable in one's determination 8 bearing shells 5 that are bearing on the end cap 6 at casing 2 two ends.This tubular linear motor can be used for mine well head car puller.

Claims

1, a kind of elementary iron core, elementary winding, secondary tubular linear motor of including is characterized in that:

(1) constitutes elementary iron core by axial bar shaped laminated core 1 and radial ringed laminated core 2 combinations;

(2) secondary by the garden steel pipe that spiral grooves and axial groove are arranged on the outer surface or the garden iron and steel heart 8, and be embedded with secondary conductor 9 in spiral grooves, be embedded with secondary conductor connector 10 and constitute at axial groove.

2, tubular linear motor as claimed in claim 1, it is characterized in that: between the elementary bar shaped laminated core 1 that the axial space of being separated by is placed, can form the axial wind ditch 12 that ventilates, on casing 7, also have air vent hole or air drain 13 and axial wind ditch 12 to be connected.

3, as claim 1 and 2 described tubular linear motors, it is characterized in that: secondary unshakable in one's determination 8 can be made up of 3～10 joint short steel pipes that screw thread is connected.

4, as claim 1 and 2 described tubular linear motors, it is characterized in that: secondary unshakable in one's determination 8 can be made up of 3～10 joint short steel pipes that are connected with screw thread of copper sheathing or aluminium cover hot charging.