RU2236904C1 - Vertical rotary plant with gas-static bearing unit - Google Patents

Abstract

FIELD: rotary plants with vertical axis of rotation.

SUBSTANCE: proposed rotary plant has housing, working member, gas-static bearing unit with bearing surfaces in form of part of sphere whose pivot is connected with working member forming rotor and step bearing is provided with central hole for delivery of gaseous working medium to bearing surfaces, gas supply system connected with central hole of step bearing, flexible bearing unit located above working member and provided with rotating bearing member made in form of ferrule and secured on working member, at least three bodies of revolution; each body of revolution is provided with flexible ring-shaped member and is mounted on axle; one end of each bearing member is connected with housing for radial displacement and is spring-loaded relative to it and second end is connected with axle of body of revolution; clearance is provided between ferrule and body of revolution.

EFFECT: enhanced operational reliability.

2 cl, 2 dwg

Description

The invention relates to rotary plants with a vertical axis of rotation of the rotor and can find application in various industries: crushers and mills with a rotary working body, centrifuges and separators for various purposes, centrifugal test benches, turbines, electric generators, engines, machine tools and other rotary plants with mainly high-speed working body for the implementation of technological processes that cause significant dynamic rotor imbalance.

Known is a vertical rotor installation (centrifuge) with a gas-static supporting unit, comprising a housing, a working body, a gas-static vertical supporting unit with hemispherical bearing surfaces, the heel of which is directly connected to the working body, forming a rotor, and the thrust bearing (stator) of which has openings for supply and exhaust gas, a gas supply system containing a compressor associated with a thrust bearing, and a pneumatic actuator interacting with the support node with the possibility of radial and angular displacements of the rotor, while npt curvature of the bearing surfaces coincides with, or is located above the center of the rotor mass [1].

However, the known rotor installation has low reliability and does not allow to significantly reduce the dynamic effects of the rotor on the support node and the installation foundation during the implementation of technological processes that cause significant dynamic unbalance of the rotor at high specific energy costs, due to the fact that the functional characteristics of the support node (parameters of bearing surfaces and the gap between the bearing surfaces), gas supply systems (gas flow parameters) and drive (The torque transmitted to the rotor) have not been optimized.

Also known is a vertical rotor installation with a gas-static supporting unit, comprising a housing, a working body, a gas-static vertical supporting unit with bearing surfaces in the form of a part of a sphere, the heel of which is directly connected to the working body, and the thrust bearing is made with a central hole for supplying a gaseous working medium to the bearing surfaces, a gas supply system containing at least one fan and connected to the Central hole of the thrust bearing, and a drive with a mechanical transmission, consisting boxes of three shafts connected in series with the possibility of intersection of the axes, one of which is made telescopic [2].

However, this rotary installation has insufficiently high reliability, because when a mode imbalance occurs in the working body and at the resonant rotation frequencies, rotor imbalance occurs, which causes high-amplitude radial and angular oscillations of the rotor, which can lead to friction and impact of the heel on the thrust bearing and the failure of the gas-static support unit. These disadvantages are associated with low radial and angular stability of the rotor caused by the absence of elastic restrictions on the radial and angular oscillations of the rotor.

The objective of the invention is to increase the reliability of the rotor installation by preventing impacts and friction of the heel on the thrust bearing when rotor imbalance occurs due to the achievement of the technical result, which consists in increasing the radial and angular stability of the rotor by providing elastic limitation of the radial and angular oscillations of the rotor.

The essence of the invention lies in the fact that to solve the problem, a vertical rotor installation with a gas-static supporting unit, comprising a housing, a working body, a gas-static vertical supporting unit with bearing surfaces as part of a sphere, the heel of which is directly connected to the working body, forming a rotor, and a thrust bearing which is made with a Central hole for supplying a gaseous working fluid to the bearing surfaces, a gas supply system associated with the Central hole of the thrust bearing, and a drive with mechanical transmission, consisting of three shafts connected in series with the possibility of intersection of the axes, one of which is made telescopic, according to the invention contains an elastic support node located above the working body and consisting of a rotating supporting element in the form of a shell mounted on a working body, rotation bodies in number of at least three, each of which is mounted on an axis, and supporting elements, each of which is connected at one end to the housing with the possibility of radial movement and is spring loaded to it, and the second end - with rotation axis of the body, wherein between the shell and a gap rotating bodies. In addition, the bodies of revolution are equipped with an elastic ring-shaped element.

The invention is illustrated by drawings: figure 1 - General view of the installation in section, figure 2 - view a in figure 1.

The vertical rotor installation with a gas-static supporting unit comprises a housing 1, a working body 2, a gas-static supporting unit with bearing surfaces as part of a sphere, the heel 3 of which is directly connected to the working body 2, forming a rotor, and the thrust bearing 4 of which is made with a central hole 5 for supply a gaseous working fluid to the bearing surfaces, a gas supply system (not shown), connected to the Central hole 5 of the thrust bearing 4, an elastic support node located above the working body 2 and consisting of a rotary the axis of the supporting element 6, made in the form of a shell and mounted on the working body 2, of the rotation bodies 7 in an amount of at least three, each of which is equipped with an elastic ring-shaped element 8 and mounted on the axis 9, and supporting elements 10, each of which is connected at one end with the housing 1 with the possibility of radial movements and spring-loaded to it by means of a spring 11, and the second end - with the axis 9 of the body 7 of rotation, and between the shell 6 and the elastic elements 8 of the body 7 of rotation there is a gap, and the drive 12 with a mechanical transmission 13, consisting of tr x shafts, connected in series with the possibility of intersection of the axes, one of which is formed telescopically.

The invention works as follows.

They include a gas supply system (not shown), containing, for example, a fan connected to the hole 5 of the thrust bearing 4. Gas (air) through the hole 5 enters the bearing surfaces and creates an excess pressure between them, under which the rotor rises (“pops up”), creating a technological gap. An air cushion is created in the gap, providing the rotor with support in the axial and radial directions.

Then turn on the drive 12 (electric motor) with a mechanical gear 13 and give the rotor rotation at the speed required for the given technological process and working body 2.

When passing through the resonant frequencies that occur during acceleration and deceleration of the rotor rotation, as well as during operational imbalance that occurs in the working body 2, the rotor performs radial and angular vibrations, the amplitude and strength of which depends on the speed of rotation of the rotor. In this case, the rotating working body 2 interacts with the elastic ring-shaped element 8 of the rotation body 7 by means of the shell 6, which is connected via the axis 9 to the elastic supporting element 10. Rotating around its axis, the rotation bodies 7 allow radial angular oscillations of the rotor to be perceived by the elastic supporting unit, perpendicular to the axis of rotation, and to extinguish them. Thus, the limitation of the amplitude of the radial and angular oscillations of the rotor is achieved, which helps prevent impacts and friction of the heel 3 on the thrust bearing 4.

Sources of information

1. British patent No. 839622, 04 04/12, publ. 1960.

2. RF patent No. 2183136, 02 C 13/14, publ. 06/10/2002.

Claims (2)

1. A vertical rotor installation with a gas-static supporting unit, comprising a housing, a working body, a gas-static vertical supporting unit with bearing surfaces in the form of a part of a sphere, the heel of which is directly connected to the working body, forming a rotor, and the thrust bearing of which is made with a central hole for supplying a gaseous working bodies to bearing surfaces, a gas supply system connected to the center hole of the thrust bearing, and a drive with a mechanical transmission consisting of three shafts, connected in series with the possibility of intersecting axes, one of which is made telescopic, characterized in that the installation contains an elastic support node located above the working body and consisting of a rotating supporting element in the form of a shell mounted on a working body, rotation bodies in an amount of at least three, each of which are mounted on the axis, and supporting elements, each of which is connected at one end to the housing with the possibility of radial movement and is spring-loaded to it, and the other end to the axis of the body of revolution, and between the shell and bodies of revolution have a gap. 2. Installation according to claim 1, characterized in that the rotation bodies are provided with an elastic ring-shaped element.

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