SU1687660A1 - Drive of twisting member of textile machine - Google Patents

Abstract

The invention relates to the textile industry, in particular, to the drive of a twisting member of a textile machine, and makes it possible to increase operational reliability. The rotor of the electric motor drive is rigidly connected to the torsion body and is installed coaxially to the stator with a three-phase winding by means of a gas-magnetic support having a thrust gas-static bearing with a disc-shaped porous liner for supplying compressed gas to the working gap between facing end surfaces of the torsion organ and the porous liner facing each other. The liner is mounted coaxially to a torsion body in a holder in which a cavity is made associated with a choke for supplying compressed gas. The cavity communicates through the openings with an annular distribution chamber provided in the holder with a co-axially porous liner. Through channels arranged perpendicular to the axis of the liner, intersecting on this axis and communicating with the annular distribution chamber, are made in the porous liner. 2 Il. Yo

Description

The invention relates to the textile industry and concerns the drive of a torsion body, in particular, a spinning rotor of a pneumatic spinning machine.

The purpose of the invention is to increase reliability in operation.

Figure 1 shows the drive of the torsional body, a longitudinal section; figure 2 is a porous liner, the cross section.

The drive of the torsion organ, in particular, the spinning rotor 1, comprises an end motor having a stator 3 mounted in the housing 2 with a magnetic conductor, in which three-phase winding 4 is connected, which is connected to a voltage source (not shown) in the housing 5. ). The rotor 6 of the electric motor is pressed into the sleeve 7 and

mounted coaxially to the stator by means of a gas-magnetic support having a thrust gas-static bearing with a disc-shaped porous liner 8. On the rotor, a spinning rotor 1 is fixed coaxially with it, coaxially with which porous insert 8 is placed in the holder 9 with the possibility of forming a working gap 10 between the facing surfaces of the other Dilny rotor and liner.

The holder 9 is fixed to the fitting 11 for supplying compressed gas and its cavity 12 is connected to the fitting 11. In the holder 9 concentrically to the insert 8 there is an annular distribution chamber 13 connected to the cavity 12 in the holder by uniformly circumferentially circumferential chamber 13 holes 14. In the insert 8 is made through channels 15.

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located perpendicular to its axis 16 intersecting them on this axis and communicating with the annular distribution pit 13.

Drive torsional body works as follows

Compressed gas is fed through fitting 11 into junction 12 of holder 9 separated from the lower end of porous liner 8 by a rigid partition 17, while the gas flow velocity vector changes its direction by 90 ° and the kinetic energy of the gas flow is transformed into the potential energy of the compressed gas. A rigid partition 17 allows the porous liner 8 to be protected from direct axial action of the gas jet and, therefore, prevents the liner from being torn from the holder. From the cavity 12 through the holes 14, the compressed gas enters the annular distribution chamber 13 and through the channels 16m the porous liner 8 leaves the working gap 10 of the gas-static bearing.

Further, through the gap between the holder, the sleeve 7 and the rotor 6, the gas exhausted in the gas bearing leaves through the opening 18 of the housing to the atmosphere.

After supplying the compressed gas to the gap of the gas-static bearing, the rotor b with the sleeve 1 with the direct-rotor rotor 1 floats on the layer of gas lubricant. They can be held in this position by connecting winding 4 to a DC source. When acting on the output ends of the alternating voltage cable 5 in the windings 4 of the stator electric motors, a running electromagnetic field arises, which causes the rotor 6 to rotate with the spinning rotor 1,

When the rotor 6 is rotated with the spinning rotor 1, the axle direction is held axially by means of a gas-magnetic suspension, which is created by the electromagnetic force of the rotor 6 to the stator and by the pushing force of the gas layer. In the radial direction, the rotor is held by magnetic forces appearing on the lateral surfaces of the concentric annular teeth formed on the working surface of the rotor and the stator.

When the alternating voltage source is disconnected, the ne 4 stator is again energized from the direct current source, which makes it possible to quickly brake the rotor with the spinning rotor 1 and prevents them from being pushed out by the gas layer,

The location of the channels 15 perpendicular to the axis of the liner contributes to the fact that the compressed gas, falling into the working gap 10 of the gas-static bearing, passes not

through the entire thickness of the porous liner, and only through its part, since the pressure drop in the capillaries (pores) of the porous liner is proportional to their length, ts with a smaller gas path in the porous liner will have a higher output gas pressure into the working gap and therefore the bearing characteristics ( lift force, stiffness) will also be higher.

The implementation of the supply of compressed gas in

an annular distribution chamber from the holder cavity along evenly spaced apertures around the chamber circumference and making the channels in the insert through and communicating at both ends with

an annular chamber ensures the equalization of pressure and pressure of compressed gas along the length of the channels and uniform gas pressure in the working gap of the gas-static bearing, which contributes to an increase in the reliability of the drive.

Claims (1)

Invention Formula A drive of a torsion organ of a textile machine, comprising an end motor having a stator with a three-phase winding and a company installed in a housing, with a twisting member coaxially attached to it, mounted coaxially with a stator by means of a gas-magnetic support having a thrust gas-static bearing with a disc-shaped porous liner installed coaxially with a twisting body with the possibility of forming a working gap between the end faces of the liner and the torsion body facing one another and the fixed on a holder made with a cavity associated with a nozzle for supplying compressed gas, characterized in that, in order to increase reliability in operation, the holder concentrically with the porous liner has an annular distribution chamber connected by uniformly spaced around its circumference in the holder a cavity in it, and in a porous liner, through channels are arranged perpendicular to its axis with their intersection on this axis and communicating with the annular distribution chamber. 12 AT