RU222823U1 - Inter-rotor support of a gas turbine engine - Google Patents

Abstract

The utility model relates to gas turbine engines (GTE) for aviation use, in particular to supports with a bearing located between two rotating rotors. The technical result that the utility model is aimed at achieving is increasing the reliability of the gas turbine engine due to the simplicity of the design and increasing the service life of the support by installing a bearing with a higher dynamic load capacity. The technical result is achieved by the fact that in the inter-rotor support of a gas turbine engine, containing outer and inner shafts, between which a radial roller bearing with smooth outer and inner rings is installed, a safety collar and a labyrinth, unlike the known one, an inner ring with sides and a safety collar are installed and secured a nut on the high-pressure shaft, and a smooth outer ring is installed in a journal, which is secured in the low-pressure shaft with a bolted connection, into the package of which a labyrinth is attached through a flange.

Description

The utility model relates to gas turbine engines (GTE) for aviation use, in particular to supports with a bearing located between two rotating rotors.

The inter-rotor mount of the SaM146 engine is known ((SaM 146 drawing 98 photo https://stylishbag.ru/foto/sam-146-chertezh-98-foto.html, access date 09/14/2023) (https://konspekta.net/lektsiiorgimg /baza12/4401668043887.files/image012.jpg, access date 09.14.2023)), containing outer and inner shafts, between which a radial roller bearing with smooth outer and inner rings, a safety collar and a labyrinth are installed on the inner ring, which is attached to the low pressure shaft with a bolted connection.

The disadvantage of this support is the complex inner ring, which combines a mounting flange, a safety collar, an inner bearing ring with flanges and a seal labyrinth. The manufacture of such a ring requires the use of surface-hardening bearing steels. Damage to the labyrinth will result in bearing replacement. Also, this bearing is limited in terms of dynamic load capacity, which limits the service life of the support as a whole.

The technical result that the utility model is aimed at achieving is increasing the reliability of the gas turbine engine due to the simplicity of the design and increasing the service life of the support by installing a bearing with a higher dynamic load capacity.

The technical result is achieved by the fact that in the inter-rotor support of a gas turbine engine, containing outer and inner shafts, between which a radial roller bearing with smooth outer and inner rings is installed, a safety collar and a labyrinth, unlike the known one, an inner ring with sides and a safety collar are installed and secured a nut on the high-pressure shaft, and a smooth outer ring is installed in a journal, which is secured in the low-pressure shaft with a bolted connection, into the package of which a labyrinth is attached through a flange.

This solution is illustrated by the figure (fig.), which shows a general view of the inter-rotor support of the gas turbine engine.

The inter-rotor support of the gas turbine engine contains outer 1 and inner 2 shafts, between which a radial roller bearing 3 with smooth outer 4 and inner 5 rings, a safety collar 6 and a labyrinth 7 are installed, while the inner ring with flanges and the safety collar are installed on the high-pressure shaft 8, and the smooth outer ring is installed in a journal 9, which is secured in the low-pressure shaft 10 with a bolted connection 11, into the package of which a labyrinth 7 is attached through a flange 12. The inner ring with sides and a safety collar installed on the high-pressure shaft 8 are secured to it with a nut 13.

This design of the support makes it possible to install a larger bearing in the same design space, which increases the load-carrying capacity of the bearing and its service life. It should be noted that the rotation frequency of the bearing cage will change slightly (may even decrease), so increasing the size of the bearing will not lead to additional loads on the outer ring by the rolling bodies from centrifugal forces. The bearing is easy to manufacture from existing aircraft-grade bearing steels, which reduces the cost, increases the reliability and maintainability of the proposed inter-rotor support, compared to the prototype. Thus, this technical solution makes it possible to increase the reliability of gas turbine engines.

Claims (1)

Inter-rotor support of a gas turbine engine, containing outer and inner shafts, between which a radial roller bearing with smooth outer and inner rings, a safety collar and a labyrinth is installed, characterized in that the inner ring with flanges and the safety collar are installed and secured with a nut on the high-pressure shaft, and the smooth the outer ring is installed in a journal, which is secured in the low-pressure shaft with a bolted connection, into the package of which a labyrinth is attached through a flange.