SU1411526A1 - Magnetic support bearing unit - Google Patents

Abstract

The invention relates to the field of mechanical engineering and can be used in rotor mechanisms on magnetic supports as a safety bearing unit. The goal is to simplify the design and reduce metal consumption. The bearing unit is equipped with a friction pair of elements that are closed during operation of the support on the magnetic bearing. This eliminates the rotation of the bearing on the rolling bearing. There are inner and outer conical sleeves, as well as an additional sleeve. In emergency mode, the rotor draws a ring onto its conical surface due to inertial forces. The ring is mounted on the threads in the housing and has a return spring. The moment of friction of the friction pair must be sufficient to overcome the moment of resistance of the ring and the return spring. The device allows rotor centering due to the rotor kinetic energy. 2 h. the item of f-ly, 4 ill. (ABOUT

Description

The invention relates to mechanical engineering and can be used in rotor-1 mechanisms on magnetic supports, as a safety bearing unit.

The purpose of the invention is to simplify the design and reduce metal consumption.

FIG. 1 shows an embodiment of a bearing assembly with a bearing mounted between the threaded ring and the outer conical sleeve; in fig. 2 the same version of the node, which is in a disabled state; in fig. 3 is an operating version of a bearing assembly with a bearing mounted between the rotor and the inner conical sleeve; in fig. 4 - the same variant of the node, which is in the disabled state.

The bearing unit of the magnetic support is the rotor 1, the inner sleeve 2 with the outer conical surface 3, the outer sleeve 4 with the inner conical surface 5, POL1GPI1NIK 6, housing 7, torsion spring 8, friction pair with element 9 and 10, and Element 9 is installed with a Pomon, a resilient element II.

The embodiment of the bearing assembly shown in FIG. 1, contains a ring 12 mounted in the housing 7 on a thread, on the ring 12 one end of the spring 8 is fixed — the other is fixed to the housing 7 and o6oi-ix of the versions.

Cola No. 12 is also firmly fixed on e; 1meg yy 10 friction pair.

Ba) and the version of the bearing assembly; ia, shown in FIG. 3, comprises a sleeve 13 fixed to the rotor 1 on which the element 10 of the friction pair is rigidly fixed.

The bearing assembly works as follows.

In the event of a loss of stability of the magnetic bearing operation or an electronic disconnection, the rotating rotor 1 deviates from the center position. In this case, the inner sleeve 2 enters the syncrosis with its conical surface 3 with the conical surface 5 outside of the linear sleeve 4.

. The torque due to friction forces in a friction pair of elements 9 and 10 and b. the friction in the bearing 6 is transmitted either to the ring 12 (Fig. 1), or to the sleeve 4 (Fig. 3) and, overcoming the moment of resistance generated by the spring 8 and the friction forces in the thread 14, wraps either the ring 12 or the sleeve 4, depending from the variant of execution, and thus returns the rotor to the center position (Fig. 2 and 4).

Moreover, in the embodiment shown in FIG. 1, but as the outer sleeve 4 is unwound, the center 5 protrudes

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five

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five

The beating force that pushes the element 9 and thereby opens the friction pair. In the embodiment shown in FIG. 2, the opening of the friction pair occurs as the centrifugal force decreases by reducing the rotation frequency of the rotor 1.

In this case, the force of the elastic element 11 retracts the friction element 9 from the element 10.

To ensure the operability of the device, it is necessary to fulfill the conditions Mtf Mtr + Mpr Mtk; MTK MTF; Mti + Mtr Mpr; Mt.M.1R, where Mtf is the moment of friction rest in a free pair of elements 9, 10; Mi (p - the maximum moment of the spring 8; Mpr - the minimum moment of the spring 8; Mtr - the moment of friction in the unloaded

threaded connection 14; Mtr - the moment of training in the loaded

threaded connection 14; Mtc - the moment of the friction-slip in the conical contact of surfaces 2 and 5;

MTP - the moment of rolling friction in the bearing 6.

Thus, the overcoming of the forces of friction and the return of the rotor to the central position is due to the kinetic energy of the rotor. When the magnetic bearing goes into normal operation, the magnetic bearing compensates for the rotor weight force, thereby unloading the threaded joint 14 and the spring 8 returns a1, the sleeve 6 returns to its original position.

The use of the proposed technical solution in comparison with the known one allows to simplify the design of the bearing assembly of the magnetic support and reduce its metal intensity, as well as reduce energy consumption by introducing a friction pair of elements into the bearing assembly

9 and 10 and the threaded joint 14, whereby the return of the rotor 3 to the central position is driven by the energy of the rotating rotor, which makes it possible to exclude an electromagnet from the design of the bearing assembly, equal in size to a magnetic bearing in terms of carrying capacity and dimensions.

The proposed version of the magnetic bearing assembly, with the location of the bearing on the rotor shaft, it is advisable to use in the absence of the possibility of balancing the rotor in the process bearings.

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Claims (3)

Invention Formula 551- Bearing unit. Magnetic support, a housing, concentric spaced tapered bushings mounted with relative axial displacement, as well as a rotor and a spring fixed at one end to the housing, characterized in that, in order to simplify the design and reduce metal consumption, it is equipped with a friction pair The mountain is mounted in the assembly elastically, and the other is rigidly, while the spring is made in the form of a torsion spring. 2. A bearing assembly according to claim 1, characterized in that it is further provided with a ring mounted in the housing by means of a threaded joint connected to the other end of the spring, the inner conical sleeve is mounted on the rotor, and the bearing is mounted between the outer conical sleeve and the ring, W the end of the spring. the first friction element is mounted on the outer conical sleeve, and the second - on the ring. 3. The bearing unit according to claim 1, characterized in that it is provided with an additional sleeve mounted on the rotor, on which the second friction element is fixed, and the first is fixed on the inner conical sleeve, in this case the bearing is mounted on the rotor, the inner conical sleeve is mounted on the cylindrical surface of the outer ring of the bearing, and the outer conical sleeve is installed in the housing by means of a threaded connection and connected to another FIG. H