Lubricating oil seal structure and aero-engine
An aero-engine and lubricating oil technology, which is applied in the direction of engine components, combustion engines, machines/engines, etc., can solve the problem that it is difficult to take care of floating rings and grate teeth at the same time, it is difficult to deal with the high-temperature and high-pressure environment of gas turbine bearings, and interstage booster bleed air The structural sealing of the flow path needs to be improved to achieve a good secondary sealing effect and the effect of preventing oil leakage
Active Publication Date: 2022-05-31
AECC HUNAN AVIATION POWERPLANT RES INST
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Problems solved by technology
Existing single-stage seals are difficult to cope with the high temperature and high pressure environment of gas turbine bearings
Although the two-stage seal is better than the single-stage seal, it is difficult to take into account the advantages and disadvantages of the floating ring or the grate tooth seal of a single element, and the interstage pressurized air-bleed structure and the corresponding sealing flow path also need to be improved
Method used
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[0054] Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that this
[0055] In the following description of various exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form
[0069] Preferably, as shown in FIG. 3, in this embodiment, the tooth height e of the tooth shape of the grate teeth can be preferably 1.5mm~
[0072] Preferably, in this embodiment, the thickness of the first graphite ring 231 may preferably be 2 mm to 4 mm in radial direction.
[0073] Preferably, in this embodiment, the second graphite ring 232 may preferably have a radial thickness of 2 mm to 4 mm.
[0074] Preferably, in this embodiment, each graphite ring may preferably include an inner and outer two-layer ring. on the basis of,
[0076] Preferably, as shown in FIG. 1, in this embodiment, the axial positioning assembly may preferably inclu...
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The invention proposes a lubricating oil seal structure and an aero-engine. The lubricating oil seal structure includes a grate ring, a sealing shell and two graphite rings; the grate ring is sleeved on the rotating shaft, the grate ring has an outer ring surface, Two sets of grate teeth are arranged around the surface at intervals along the axial front and back; the sealing shell is set around the outer circumference of the grate ring and has an axial positioning component, and the sealing shell is provided with a pre-rotating blade flow channel; two graphite rings are respectively sleeved Between the grate ring and the sealing shell, two graphite rings are arranged at intervals in the front and back along the axial direction, and respectively correspond to two sets of grate teeth in a clearance fit manner, and the two graphite rings are axially positioned by an axial positioning component. The two graphite rings are floating ring structures; the lubricating oil seal structure is configured for the external airflow to flow through the pre-rotating blade flow channel, the gap between the two graphite rings, the gap between the two sets of grate teeth and the two graphite rings After the gap between the two groups of grate teeth, it flows to the space on the front and rear sides of the sealed shell respectively.
Description
Oil seal structure and aero-engine technical field [0001] The present invention relates to the technical field of aero-engines, in particular to a lubricating oil sealing structure and aero-engines. Background technique [0002] In the field of aero-engines, especially gas turbine engines, the existing lubricating oil sealing methods include floating ring seals. Seals and grate seals, etc. However, the existing floating ring seal is a gap type circumferential seal, which is used to seal the lubricating oil cavity, It is sensitive to leakage. After being contaminated with lubricating oil, under the action of high temperature in the bearing cavity, the lubricating oil is coked, which can easily lead to the failure of the floating ring. Grate structure phase Compared with the floating ring, it is more convenient to process and occupies less radial structure space. It is widely used in various gas seals. However, seal When the lubricating oil is severe, the lubricating ...
Claims
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IPC IPC(8): F02C7/28F02C7/06F02C7/18F01D11/00F01D11/06
CPCF02C7/28F02C7/06F02C7/18F01D11/00F01D11/06Y02T10/12
Inventor 何康贺宜红蒋康河聂建豪张若昀马莉
Owner AECC HUNAN AVIATION POWERPLANT RES INST