SU470890A1 - Linear motor - Google Patents

Description

The invention is intended primarily for work in mines with large tilt angles (for the movement of people, transportation of materials and equipment).

The known linear electric motor has a bark of C-shaped section, inside of which an inductor is located in the form of a rectangular prism on the rollers located on the outer side of the core.

The manufacture of a C-shaped core with a rectangular inductor is a laborious and non-technological process. It is economically unprofitable to use a linear electric motor of this design for transporting goods over considerable distances.

To stabilize the air gap between the core and the inductor, a device is proposed in which a platform is suspended to the axis of the inductor, the stand of which is connected to rollers having a rolling surface in the form of a curve whose radius of curvature is equal to the radius of the cross-section of the cross-section of the core, and the inductor is in the form of a solid cylinder with annular grooves, the magnetic core of which consists of a pack of split annular plates placed on the axis of the inductor and compressed on both sides by washers with single forged screw thread.

It is possible to manufacture such a linear electric motor with a C-shaped bark with increased accuracy, and, accordingly, of superior quality, i.e. with a higher efficiency.

FIG. 1 shows the structure of the proposed device, a cross-section; in fig. 2 - inductor design.

A linear electric motor consists of an inductor 1 that represents in section the circumference, which acts as a magnetic conductor, in whose slots 2 a three-phase current winding is laid. Platform 4 is suspended to axis 3 of inductor 1, rigidly connected to rack 5. Roller 6 with a shaped surface

The roller, connected to the 5-axis, is located on top of the outer side of the core 7, made of a standard metal pipe. The roller 8 is attached to the rack 5 and is located in the section of the core 7, in contact with

one of its sides depending on the skew of the platform 4 under the action of an asymmetrically located load. The roller 8 does not allow friction of the rack 5 with a split part of the core 7, thereby reducing the resistance

movement.

The inductor magnetic core is assembled from annular split plates 9, located on axis 3 and compressed on both sides by washers 10, made with single-screw cutting (see

FIG. 2). Spiral washers 10 install the split annular plates 9 in a spiral, forming a cylinder on which annular nazami 2 are cut for stacking three-phase alternating current windings. Frontal winding connections are located in the longitudinal groove 11.

The direction of the alternating current in the winding of the inductor is indicated by an arrow that intersects the stacked but spirals and annular split plates insulated from each other (with varnish or glue) (see Fig. 2). Placed in such a way, the plates create a high resistance for eddy currents that arise in the magnetic conductor.

The proposed device operates according to the principle of operation of three-phase asynchronous electric motors with a short-circuited rotor. When the inductor 1 winding is turned on into a three-phase current network, a traveling magnetic field is formed in the inductor. The running magnetic field of inductor 1, interacting with the currents of the core 7, drives the inductor 1 together with the platform 4, to which the rack 5 with the rollers 6 is rigidly attached, moving along the outer surface of the core 7. The platform suspended from the inductor 1. 4 under the action of its own weight on CGSGDIT-C7G-in-equilibrium, and the adjusted air gap between the core 7 and the inductor 1 does not change and remains stable with a certain deviation of the rack 5 under the action of gravity, not symmetrically located on the platform 4 of the load. Friction on the stand 7 of the stand 5 and its deviation may be minimal if additional rollers are attached to the stand, which are located in the section of the core.

Thus, the air gap is achieved by hinging the axis 3 of the inductor 1 with the column 5, which under the action of gravity is in balance and together with the inductor 1 moves on the rollers 6 moving along the external surface of the core 7.

The air gap is stabilized by rollers 6 (see Fig. 1) moving on the outer surface of the core 7.

The reaction from the force of gravity of the platform and the load on the rollers 6 and the curvature of the rolling surface create conditions for the steady polishing of the rollers 6 on the external surface of the core 7.

Foreign bodies, for example, pieces of rock that fall on the outer surface of core 7, slide off of it and do not interfere with the movement of the rollers 6.

The current lead to the inductor is performed by known methods from contact wires or from a cable that can be twisted from a coil.

In the mine explosion-proof version, the current is carried out only from the cable,

because the electric machine is safe in terms of dust and gas, if its casing has gaps of not more than 0.2 mm and a wall thickness of at least 25 m.m. In the proposed and well-known linear motors, the width of the groove of the core

not much more than the allowable clearance according to safety rules, therefore laying of current-carrying tires inside the core does not ensure the explosion safety of the engine.

Subject invention

Linear motor containing

fixed C-shaped measles and an inductor located in it, connected to rollers moving along the outer surface of the core, characterized in that, in order to stabilize the air gap

between the core and the inductor, a platform is suspended from the axis of the inductor; grooves, the magnetic core of which consists of a stack of split annular plates placed on

axes of the inductor and single-turn screw shredded compressed on both sides.

WUZ.2