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CN-121994496-A - Aeroengine bearing cavity simulation test device

CN121994496ACN 121994496 ACN121994496 ACN 121994496ACN-121994496-A

Abstract

The application belongs to the technical field of aeroengine bearing cavity simulation test design, and particularly relates to an aeroengine bearing cavity simulation test device which is simultaneously provided with bearing injection oil supply and oil supply under a ring, and can simulate a main oil supply mode of a bearing cavity, can realize the approximate simulation of the collision of rotating parts such as a turbine disc, a gear and the like in the bearing cavity on lubricating oil drops, and can realize the simulation of the basic sealing air inlet and ventilation functions of the bearing cavity.

Inventors

  • LU BIN
  • LIU XIANGKUN
  • ZHANG PENGFA

Assignees

  • 中国航发沈阳发动机研究所

Dates

Publication Date
20260508
Application Date
20260210

Claims (10)

  1. 1. The aeroengine bearing cavity simulation test device is characterized by comprising a shell (1), a rotating shaft (2), a single roller bearing (3) and a double ball bearing (4); the shell (1) is of a cylindrical structure and is transversely arranged, an oil supply atomizing nozzle (5), an air supply joint (6) and a ventilation joint (7) are arranged at the top, and an oil return port is arranged at the bottom; The two ends of the shell (1) are provided with a roller bearing seat (9) and a ball bearing seat (10); the rotating shaft (2) transversely penetrates through the shell (1); The rotating shaft (2) is sleeved with a roller bearing bush (11) and a ball bearing bush (12), the roller bearing bush (11) and the ball bearing bush (12) are positioned on the roller bearing seat (9), and the ball bearing seat (10) is positioned on the inner side of the rotating shaft (2); A roller bearing oil collecting port and a ball bearing oil collecting port are formed among the roller bearing bush (11), the ball bearing bush (12) and the rotating shaft (2); The single roller bearing (3) is arranged in the roller bearing seat (9) and sleeved on the roller bearing bushing (11); A lower oil supply channel of a roller bearing ring is formed between the single roller bearing (3) and the roller bearing bush (11), the lower oil supply channel of the roller bearing ring is communicated with an oil collecting port of the roller bearing through an oil through hole formed in the side wall of the roller bearing bush (11), and the lower oil supply channel of the roller bearing ring is communicated with an oil through hole formed in the side wall of the inner ring of the single roller bearing (3); the double ball bearings (4) are arranged in the ball bearing seat (10) and are sleeved on the ball bearing bush (12); A ball bearing ring lower oil supply channel is formed between the double ball bearings (4) and the ball bearing bush (12), the ball bearing ring lower oil supply channel is communicated with a ball bearing oil collecting port through an oil through hole formed in the side wall of the ball bearing bush (12), and the ball bearing ring lower oil supply channel is communicated with an oil through hole formed in the side wall of the inner ring of the double ball bearings (4); The roller bearing bushing (11) is sleeved with a roller bearing graphite sealing runway (15), the roller bearing graphite sealing runway (15) is positioned at the outer side of the single roller bearing (3), and an opening faces the single roller bearing (3); The outer side of the roller bearing seat (9) is connected with a roller bearing graphite sealing seat (16), the roller bearing graphite sealing seat (16) is matched with a roller bearing graphite sealing runway (15) to form a seal, a roller bearing environment cavity (A) is formed between the roller bearing graphite sealing seat and the single roller bearing (3), and the roller bearing environment cavity (A) is communicated with the lower part of the inner part of the shell (1) through an oil return channel formed in the roller bearing seat (9); the rotating shaft (2) is sleeved with a ball bearing graphite sealing runway (17), the ball bearing graphite sealing runway (17) is positioned at the outer side of the double ball bearings (4), and the opening faces the double ball bearings (4); The outer side of the ball bearing seat (10) is connected with a ball bearing graphite sealing seat (18), the ball bearing graphite sealing seat (18) is matched with a ball bearing graphite sealing runway (17) to form a seal, and a ball bearing environment cavity (C) is formed between the ball bearing graphite sealing seat and the double ball bearings (4); The ball bearing oil collecting port is positioned in the ball bearing environment cavity (C); The roller bearing seat (9) is connected with a first oil nozzle (21), the first oil nozzle (21) is positioned in the shell (1) and is provided with an oil injection port which is opposite to the oil receiving port of the roller bearing; the ball bearing seat (10) is connected with a second oil nozzle (22), and the second oil nozzle (22) stretches into the space between the double ball bearings (4) and is provided with an oil injection port facing the space between the inner ring and the outer ring of the double ball bearings (4); the ball bearing seat (10) is connected with a third oil nozzle (23), and the third oil nozzle (23) stretches into the ball bearing environment cavity (C) and is provided with an oil injection port facing to the oil receiving port of the ball bearing.
  2. 2. The aeroengine bearing cavity simulation test device according to claim 1, wherein a plurality of oil return ports are arranged at the bottom of the shell (1); the top of the shell (1) is provided with an opening, the opening is plugged by a detachable cover plate (8), and the oil supply atomizing nozzle (5), the air supply joint (6) and the ventilation joint (7) are arranged on the cover plate (8).
  3. 3. Aeroengine bearing cavity simulation test device according to claim 2, wherein the single roller bearing (3) is an outer ring non-flange bearing; the double ball bearings (4) are inner ring split half type deep groove ball bearings.
  4. 4. An aero-engine bearing cavity simulation test device according to claim 3, characterized in that an inner ring adjusting pad (13) is arranged between the inner rings of the double ball bearing (4), and an outer ring adjusting pad (14) is arranged between the outer rings.
  5. 5. The aeroengine bearing cavity simulation test device according to claim 4, wherein a lower graphite seal ring oil supply channel is formed between the roller bearing graphite seal runway (15) and the roller bearing bushing (11), the lower graphite seal ring oil supply channel is communicated with the roller bearing oil receiving port through an oil through hole formed in the roller bearing bushing (11), and the lower graphite seal ring oil supply channel is communicated with an opening of the roller bearing graphite seal runway (15) through the oil through hole formed in the roller bearing graphite seal runway (15).
  6. 6. The aeroengine bearing cavity simulation test device according to claim 5, wherein a roller bearing graphite seal air supply port (B) is arranged on the roller bearing graphite seal seat (16).
  7. 7. The aeroengine bearing cavity simulation test device according to claim 6, wherein a ball bearing graphite seal air supply port (D) is arranged on the ball bearing graphite seal seat (18).
  8. 8. The aeroengine bearing cavity simulation test apparatus of claim 7, wherein the third oil jet (23) has an oil jet opening facing the bearing graphite seal runway opening.
  9. 9. The aeroengine bearing cavity simulation test device according to claim 8, wherein an oil slinger (19) is sleeved on the rotating shaft (2); the outer edge of the oil thrower (19) is provided with an annular horizontal oil throwing edge and an inclined oil throwing edge, the horizontal oil throwing edge extends towards the direction of the single-roller bearing (3), and the inclined oil throwing edge inclines towards the direction of the double-ball bearing (4); The first oil nozzle (21) is provided with an oil injection port facing the horizontal oil throwing edge and an oil injection port facing the inclined oil throwing edge.
  10. 10. The aeroengine bearing cavity simulation test device according to claim 9, wherein a distance sleeve (20) is sleeved on the rotating shaft (2), and the distance sleeve (20) is used for spacing the axial position of the oil slinger (19) on the rotating shaft (2).

Description

Aeroengine bearing cavity simulation test device Technical Field The application belongs to the technical field of aero-engine bearing cavity simulation test design, and particularly relates to an aero-engine bearing cavity simulation test device. Background The bearing cavity of the aero-engine is an important component of a lubricating system, and the interior of the bearing cavity mainly comprises a bearing, a sealing device, a nozzle, a rotating shaft, a bearing seat and other structures. The interior of the bearing cavity of the aeroengine is a complex oil-gas two-phase flow environment, most of the current simulation test devices for the bearing cavity of the aeroengine only can simulate the working characteristics of the bearing, the test cavity can only realize simple bearing oil supply and oil return, and cannot simulate the working characteristics of various bearing oil supply modes (oil supply by injection, oil supply under a ring), oil throwing of a rotating shaft (collision action of a turbine disc, a gear and the like on oil drops), ventilation and exhaust and the like of the bearing cavity, so that the research on the internal flow characteristics of the bearing cavity is single, and the structural design of the bearing cavity of the aeroengine is difficult to effectively support. The present application has been made in view of the above-described technical drawbacks. Disclosure of Invention The application aims to provide an aeroengine bearing cavity simulation test device which overcomes or alleviates the technical defects of at least one aspect of the known technology. The technical scheme of the application is as follows: an aeroengine bearing cavity simulation test device comprises a shell, a rotating shaft, a single roller bearing and a double ball bearing. The shell is of a cylindrical structure and is transversely arranged, an oil supply atomizing nozzle, an air supply joint and a ventilation joint are arranged at the top, and an oil return port is arranged at the bottom; the two ends of the shell are provided with roller bearing seats and ball bearing seats; The rotating shaft transversely penetrates through the shell; The rotating shaft is sleeved with a roller bearing bush and a ball bearing bush, wherein the roller bearing bush and the ball bearing bush are positioned on a roller bearing seat, and the ball bearing seat is positioned on the inner side of the rotating shaft; A roller bearing oil collecting port and a ball bearing oil collecting port are formed among the roller bearing bush, the ball bearing bush and the rotating shaft; the single roller bearing is arranged in the roller bearing seat and sleeved on the roller bearing bushing; A lower oil supply channel of the roller bearing ring is formed between the single roller bearing and the roller bearing bushing, the lower oil supply channel of the roller bearing ring is communicated with an oil collecting port of the roller bearing through an oil through hole formed in the side wall of the roller bearing bushing, and the lower oil supply channel of the roller bearing ring is communicated with an oil through hole formed in the side wall of an inner ring of the single roller bearing; The double ball bearings are arranged in the ball bearing seats and sleeved on the ball bearing bushes; a ball bearing ring lower oil supply channel is formed between the double ball bearings and the ball bearing bush, the ball bearing ring lower oil supply channel is communicated with a ball bearing oil collecting port through an oil through hole formed in the side wall of the ball bearing bush, and the ball bearing ring lower oil supply channel is communicated with an oil through hole formed in the side wall of the double ball bearing inner ring; the roller bearing bushing is sleeved with a roller bearing graphite sealing runway, the roller bearing graphite sealing runway is positioned at the outer side of the single roller bearing, and the opening of the roller bearing graphite sealing runway faces the single roller bearing; The outer side of the roller bearing seat is connected with a roller bearing graphite sealing seat, the roller bearing graphite sealing seat is matched with a roller bearing graphite sealing runway to form a seal, a roller bearing environment cavity is formed between the roller bearing graphite sealing seat and a single roller bearing, and the roller bearing environment cavity is communicated with the lower part of the inner part of the shell through an oil return channel arranged on the roller bearing seat; The rotating shaft is sleeved with a ball bearing graphite sealing runway, the ball bearing graphite sealing runway is positioned at the outer side of the double ball bearings, and the opening faces the double ball bearings; The outer side of the ball bearing seat is connected with a ball bearing graphite sealing seat, and the ball bearing graphite sealing seat is matched with a ball bearing graphite sealing runway to f