RU2539909C1 - Elastic damping support of turbo-machine rotor - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: elastic damping support of a turbo-machine rotor includes a bearing installed on a shaft and a stator element. The stator element includes a shell and a shell fixed on the outer ring of the bearing. The latter shell is connected to the stator element by means of a split bushing and forms together with it a damping cavity restricted by seals. On opposite sections of the shells, which are located between the split bushing and the seal that is the closest to it, there are splines and mating splines so that a gap is formed between them. Preferably, the splines and the mating splines have straight sides.

EFFECT: improving reliability owing to reducing probable destruction of a split bushing in case of non-standard operation of a turbo-machine support, and namely, in case of partial transmission of torque from the shaft to the stator element.

2 cl, 2 dwg

Description

The invention relates to the field of turbomachinery, and in particular to the design of elastic-damping supports of rotors of turbomachines.

Known elastic damper support of a rotor of a turbomachine, comprising a bearing mounted on a shaft, a stator element containing a shell and a shell mounted on the outer ring of the bearing connected to the stator element by means of a split sleeve and forming a damping cavity bounded by seals (RU No. 2265728, publ. 10.12. .2005).

In the construction of the known support, a device is implemented from turning the elastic element (split sleeve) in case of partial transmission of torque from the shaft to the stator element. This device does not provide sufficient reliability, since there are known cases of destruction of the split sleeve of the support by torque during operation or bench tests of turbomachines.

The task of the claimed invention is to provide an elastic damper support devoid of the above disadvantages.

The technical result achieved by using the declared elastic-damper support of the rotor of the turbomachine is to increase its reliability by reducing the likelihood of destruction of the split sleeve in case of abnormal operation of the turbomachine support, namely, in the case of partial transmission of torque from the shaft to the stator element.

The specified technical result is achieved by the fact that in the elastic-damping support of the rotor of the turbomachine, containing a bearing mounted on the shaft, a stator element containing a shell and a shell mounted on the outer ring of the bearing connected to the stator element by means of a split sleeve and forming a damping cavity bounded by seals with it, according to the invention, on opposite sections of the shells located between the split sleeve and the closest seal to it, slots and reciprocal slots are made, with the image vaniem gap between them.

The execution on the sections of the shells of the slots in the manner described above allows, in the case of partial transmission of torque from the shaft of the turbomachine to the stator element, to exclude the split sleeve from the power connection, thereby preventing its destruction. This effect is achieved by sampling the gap between the side surfaces of the splines and transmitting torque from the shaft through the shells to the stator element, bypassing the split sleeve. A similar implementation of the device from the rotation of the elastic element of the support allows you to transfer without breaking about two orders of magnitude more torque to the stator element.

In the particular case of the implementation of the claimed invention, the slots 11 and the response slots 12 are made straight-line.

This form of execution of the slots is optimal, because is the most technologically advanced and allows you to sufficiently control the accuracy of manufacture to implement the necessary clearance.

Figure 1 shows a longitudinal section of an elastic damper support of a rotor of a turbomachine, figure 2 shows a section A-A.

The elastic damper support of the rotor of the turbomachine, comprising a bearing 1 mounted on a shaft 2, a stator element 3 comprising a shell 4 and a shell 6 fixed to the outer ring 5 of the bearing 1, connected to the stator element 3 by means of a split sleeve 7 and forming a damping cavity 8 therebetween seals 9 and 10, while on opposite sections of the said shells 4 and 6 located between the split sleeve 7 and the closest seal 9, slots 11 and reciprocal slots 12 are formed, with the formation of a gap between them.

Said slots 11 and counter slots 12 are made straight-line.

During operation of the turbomachine in the situation of the rolling elements of the rolling elements of the bearing 1, the torque is partially transmitted from the shaft 2 to the ring 6. As a result, the gap between the slots 11 and the return slots 12 is selected. This leads to the fact that the torque is transmitted further to the stator element 3 through the ring 4, bypassing the less durable split sleeve 7, preventing its destruction and increasing the reliability of the claimed support.

Claims (2)

1. The elastic damper support of the rotor of the turbomachine, comprising a bearing mounted on the shaft, a stator element comprising a shell and a shell mounted on the outer ring of the bearing, connected to the stator element by means of a split sleeve and forming a damping cavity bounded by seals, characterized in that it is opposite sections of the shells located between the split sleeve and the closest seal thereto are made slots and reciprocal slots, with the formation of a gap between them. 2. The elastic damper rotor support of the turbomachine according to claim 1, characterized in that the slots and reciprocal slots are made straight-line.

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