SU1557206A1 - Spinning unit drive - Google Patents

Abstract

The invention relates to equipment for the textile industry and allows to increase the uniformity of rotation of the spinning unit by introducing a stitch pressed into a cylindrical bore and a sleeve made of magnetically soft material, the length of which is equal to the total length of the stator magnetic circuit and the frontal parts of the stator winding. a truncated cone equal to the length of the sleeve, and the inner surface of the sleeve is tapered. In the body of the sleeve there are connecting radial and axial channels for supplying compressed gas to the working gap. The axial channels are connected to an annular groove made in the end of the sleeve and closing the lid, and a layer of non-magnetic antifriction material is applied to the inner conical surface of the sleeve. 1 hp f-ly, 3 ill.

Description

The invention relates to equipment for the textile industry, namely to drives of spinning devices, and can be used on machines for pneumatic spinning.

The aim of the invention is to increase the uniformity of rotation.

FIG. 1 shows the drive of the spinning unit; in fig. 2 - sleeve made of soft magnetic material; in fig. 3 is a section A-A in FIG. 2

The drive of the spinning unit contains a ferromagnetic rotor 1 made in the form of a truncated cone and a spinning bowl 2 made in the form of a single part, the stator magnetic circuit in the form of a package 3 with a cylindrical bore, in the slots of which three-phase distributed winding 4 is laid, and pressed into the cylindrical bore of the package a sleeve 5 made of a magnetically soft material and having an internal conical surface on which a layer 6 of a non-magnetic antifriction material is applied, the sleeve length being not less than the total length of the magnet The wires of the stator and the frontal parts of the stator winding with the length of the rotor 1 (its conical part) equal to the length of the sleeve 5. On the outer surface of the sleeve 5 are made grooves 7, coinciding in direction and length with the slots 8 of the stator, in the case of the sleeve 5 are made communicating radial 9 and 10 axial channels for supplying compressed gas to the working gap 11, axial channels are interconnected by an annular groove 12 formed in the end of the sleeve 5 and closed by a lid 13 in which a piece is mounted

SP

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to

about

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cer. The drive unit is placed in the housing 15, equipped with side covers 16 and 17.

The drive of the spinning unit works as follows.

When compressed gas is supplied through the fitting 1, the annular groove 12, the axial 10 and the radial 9 channels into the working gap 11, the rotor 1 floats on the gas lubrication layer. When a three-phase distributed winding C of the stator is connected to a three-phase supply voltage source (not shown), a rotating magnetic field occurs in the stator, acting through a sleeve 5 made of soft magnetic material on the ferromagnetic rotor 1 and causing the rotor to rotate at a frequency coinciding with the frequency network. At the same time, the working electromagnetic field of the stator engages the rotor 1 in the conical bore of the sleeve 5. The rotor 1 is acted upon by the lifting force of the gas lubricant layer and the electromagnetic force of the rotor to the stater, and the interaction of these forces creates a non-contact gas-magnetic suspension of the rotor 1, the stability of the gas-magnetic suspension is provided by the magnitude of the gas and magnetic gaps provided by the layer 6 of non-magnetic material on the inner conical surface of the sleeve 5, and the magnitude of the magnetic gap is equal to the sum the magnitude of the gas gap and the thickness of the non-magnetic layer 6. Electromagnetic forces of attraction of the rotor 1 to the stator securely hold the rotor in the tapered bore of the sleeve 5 as it rotates, which ensures the operability of the drive of the spinning unit with an arbitrary position of the axis of rotation of the rotor 1. The area of the sleeve 5 when flying to the stator magnet conductor and containing grooves coinciding in direction and length with the stator slots, functionally equivalent to a magnetic wedge in the stator slots weakening the tooth created by high harmonics

five

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five

0

five

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five

The stator field increases the uniformity of rotation of the rotor 1 and the efficiency of the drive of the spinning unit. The areas of the sleeve 5 protruding beyond the stator package 3 are functionally equivalent to end ferromagnetic rings and shunt the end streams, which also helps to ensure uniform rotation of the rotor 1 and increase the efficiency of the drive.

Since the length of the sleeve 5 is equal to the length of the rotor 1 and considerably exceeds the length of the stator package 3, the drive of the spinning unit has a large bearing surface of the rotor, which ensures a significant increase in the load carrying capacity and the restoring moment with constant dimensions.

Claims (2)

1. Drive of the spinning unit, containing a ferromagnetic non-winding rotor in the form of a truncated cone, outside of which there is a nonmagnetic antifriction layer in the working gap and channels for supplying compressed gas laid in its grooves with a three-phase distributed winding into the working gap, characterized in that, in order to increase the uniformity of rotation, the stator magnetic circuit is provided with a sleeve made of soft magnetic material, placed between the rotor and the package of the stator magnetic circuit, the outer surface of which is cylindrical, and the inner surface is tapered, while the cylindrical surfaces of the sleeve and the package of the magnetic circuit are rigidly interconnected, and the non-magnetic anti-friction layer is applied on the conical surface of the sleeve. 2. The drive according to claim 1, characterized in that the channels for supplying compressed gas to the working gap are made in the sleeve housing.  - 70 FIG. g Aa figs