Aviation mouse cage vibration reduction sealing device

Abstract

The invention discloses a mouse cage vibration reduction sealing device for aviation. The mouse cage vibration reduction sealing device comprises a mouse cage vibration reduction sealing device body capable of forming a vibration reduction damping oil film. Lubricating oil enters the oil groove of the lining through the oil hole in the turbine inner support and then enters a closed space formed by the piston ring, the lining and the squirrel cage through the oil hole in the lining to form a damping oil film, so that the damping effect is achieved, the problem that vibration is easily transmitted due to the fact that the squirrel cage is directly assembled with the rear shaft neck in a relative rotating mode through the bearing is solved, and the service life of the squirrel cage is prolonged. And the condition that the comfort of personnel on the aircraft is influenced is avoided.

Description

Technical Field

[0001] The invention relates to an aviation squirrel cage vibration reduction sealing device, belonging to the technical field of aviation engines. Background Art

[0002] During the installation of an aircraft engine, after the turbine inner support is connected to the squirrel cage, the squirrel cage rotates relative to the rear journal through the bearing. During the operation of the engine, the engine is subject to the combined effects of gravity, thrust, centrifugal force, aerodynamic force and other forces, which inevitably generates vibration. The squirrel cage is directly assembled with the rear journal through the bearing, which easily transmits the vibration and affects the comfort of the passengers. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a squirrel cage vibration reduction sealing device for aviation.

[0004] The present invention is achieved through the following technical solutions.

[0005] The invention provides an aviation squirrel cage vibration reduction sealing device, comprising:

[0006] The utility model relates to a squirrel cage vibration reduction sealing device which can form a vibration reduction damping oil film.

[0007] The squirrel cage vibration damping and sealing device comprises:

[0008] rear journal;

[0009] The inner ring of the bearing is interference-mounted on the rear journal, and a rolling bearing roller is mounted on the inner ring of the bearing.

[0010] It also includes a squirrel cage constituting the outer ring of the bearing, and the squirrel cage rotates relative to the inner ring of the bearing with the bearing rollers.

[0011] The squirrel cage surface relative to the bearing roller is provided with two expansion ring grooves distributed at intervals, expansion rings are installed in the two expansion ring grooves correspondingly, and bushings are installed on the expansion rings. The heat-treated expansion rings are pressed against the bushings by elastic force; a closed space of a certain size is formed between the squirrel cage, the two expansion rings and the bushing, and the closed space is filled with a damping oil film for vibration reduction.

[0012] The bushing is installed in the turbine inner support; the bushing and the turbine inner support are both provided with oil holes, and the bushing is provided with an oil groove; the turbine inner support is fixed to the squirrel cage by stud bolts, and the stud bolts are connected to the lubricating oil supply nozzle through nuts.

[0013] The beneficial effect of the present invention is that the lubricating oil enters the oil groove of the bushing through the oil hole on the inner support of the turbine, and then enters the enclosed space formed by the expansion ring, bushing and squirrel cage through the oil hole on the bushing, forming a damping oil film, thereby achieving a vibration reduction effect, solving the problem that the squirrel cage is directly assembled with the rear shaft neck through the bearing for relative rotation, which easily transmits vibration, and avoiding the situation that affects the comfort of the people on board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross section of the assembly position of the present invention;

[0015] In the figure: 1-rear journal; 2-bearing inner ring; 3-bearing roller; 4-squirrel cage; 5-expansion ring; 6-bushing; 7-turbine inner support; 8-nut; 9-stud bolt; 10-lubricating oil supply nozzle. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0017] like Figure 1 shown.

[0018] The present invention discloses a cage vibration damping sealing device for aviation, comprising:

[0019] The rear journal 1 is interference-fitted with a bearing inner ring 2, and a rollable bearing roller 3 is mounted on the bearing inner ring 2.

[0020] The squirrel cage 4 constitutes the outer ring of the bearing, and the squirrel cage 4 replaces the outer ring of the bearing, which is equivalent to the bearing outer ring and the squirrel cage 4 being integrated into one piece; the original interference fit between the bearing outer ring and the squirrel cage 4 is reduced, the generation of assembly stress therein is avoided, and the factors affecting the vibration reduction effect are reduced.

[0021] Two expansion ring grooves are arranged at intervals on the surface of the squirrel cage 4 relative to the bearing roller 3, and expansion rings 5 ​​are installed in the two expansion ring grooves respectively, and a bushing 6 is installed on the expansion ring 5. The heat-treated expansion ring 5 is pressed against the bushing 6 by elastic force; a closed space of a certain size is formed between the squirrel cage 4, the two expansion rings 5 ​​and the bushing 6, and the closed space is filled with a damping oil film for vibration reduction.

[0022] The bushing 6 is installed on the turbine inner support 7; the bushing 6 and the turbine inner support 7 are both provided with oil holes, and the bushing 6 is provided with an oil groove; the turbine inner support 7 is fixed to the squirrel cage 4 by stud bolts 9, and the stud bolts 9 are connected to the lubricating oil supply nozzle 10 through nuts 8.

[0023] When the engine is working, the lubricating oil is supplied by the lubricating oil supply nozzle 10, and the lubricating oil enters the oil groove of the bushing 6 through the oil hole on the turbine inner support 7, and then enters the closed space formed by the expansion ring 5, bushing 6 and squirrel cage 4 through the oil hole on the bushing 6, forming a large damping oil film, thereby achieving a vibration reduction effect, solving the problem that the squirrel cage is directly assembled with the rear shaft neck through the bearing for relative rotation, which is easy to transmit vibration, and avoiding the situation that affects the comfort of the people on board.

Claims

1. An aviation squirrel cage vibration damping sealing device, characterized in that: include: The utility model relates to a squirrel cage vibration reduction sealing device which can form a vibration reduction damping oil film.

2. The aviation squirrel cage vibration damping sealing device according to claim 1, characterized in that: The squirrel cage vibration damping and sealing device comprises: Rear journal (1); The inner ring of the bearing (2) is interference-mounted on the rear journal (1), and a rolling bearing roller (3) is mounted on the inner ring of the bearing (2).

3. The aviation squirrel cage vibration damping sealing device according to claim 2, characterized in that: It also includes a squirrel cage (4) constituting the outer ring of the bearing, and the squirrel cage (4) rotates relative to the inner ring (2) of the bearing with the bearing rollers (3).

4. The aviation squirrel cage vibration damping sealing device according to claim 3, characterized in that: Two expansion ring grooves are arranged at intervals on the surface of the squirrel cage (4) relative to the bearing roller (3), expansion rings (5) are installed in the two expansion ring grooves respectively, and a bushing (6) is installed on the expansion ring (5), and the expansion ring (5) after heat treatment is pressed against the bushing (6) by elastic force; a closed space of a certain size is formed between the squirrel cage (4), the two expansion rings (5) and the bushing (6), and the closed space is filled with a damping oil film for vibration reduction.

5. The aviation squirrel cage vibration damping sealing device according to claim 4, characterized in that: The bushing (6) is installed on the turbine inner support (7); the bushing (6) and the turbine inner support (7) are both provided with oil holes, and the bushing (6) is provided with an oil groove; the turbine inner support (7) is fixed to the squirrel cage (4) by means of stud bolts (9), and the stud bolts (9) are connected to the lubricating oil supply nozzle (10) via nuts (8).

Images