Machining protective device and method for bearing lining of turbofan engine bearing machine box
A turbofan engine and bearing bushing technology is applied in the field of anti-corrosion devices during the machining process of turbofan engine supporting casing bearing bushings, which can solve the problems of scrapped parts, easy rusting, and difficulty in cleaning, and can ensure sealing resistance to rust and potentiometric corrosion
Active Publication Date: 2019-04-16
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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Problems solved by technology
Iron filings generated during post-welding machining easily enter the cavity, making it difficult to remove
Therefore, add urea to the cavity of the part before machining, and then fill and seal the cavity with paraffin wax to prevent the excess from entering. After the machining is completed, soak in hot water to remove paraffin wax and urea. The removal time generally takes 20 hours In this process, the material of the bearing bush on the supporting casing is 2Cr3WMoV, which is prone to rust after contact with water and urea, and the parts will be scrapped in severe cases
Method used
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[0022] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but the claimed protection scope is not limited to the description.
[0023] The turbofan engine support casing is a multi-material, complex cavity with parts that are easily corroded. Corrosion-prone surfaces to be protected on support case bearing bushes require special treatment.
[0024] Such as figure 1 , Picture 1-1 , figure 2 , Figure 3-1 , image 3 and Figure 3-1 It is a diagram of the protective device designed according to the processing environment of the part and the structure of the part itself. The device includes a sealing cover (such as figure 1 and Picture 1-1 ), the sealing cover includes a ring-shaped base body whose diameter is equal to the end face circle of the bearing bushing of the support casing, and an end surface of the ring-shaped base body is provided with a The ring body of the inner diameter of the pro...
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The invention discloses a machining protective device and method for a bearing lining of a turbofan engine bearing machine box. The protective device comprises a sealing cover and a sealing seat, thesealing cover and the sealing seat form a sealing cavity, and meanwhile, peeling glue is used. By using the method of combining the protective device with protective adhesive, a bearing lining part ofthe bearing machine box is isolated from liquid water used in cleaning when the bearing machine box is cleaned, so that the rustiness and potential corrosion of the bearing lining are avoided.
Description
technical field [0001] The invention relates to a protection method in the machining process of an aero-engine, in particular to an anti-corrosion device and method in the machining process of a turbofan engine support case bearing bush. Background technique [0002] The materials involved in the turbofan engine supporting casing are TA15, 2Cr3WMoV, and GH2696, etc., which are assembled and welded by multi-level parts and components. A large number of cavities, and some cavities are deep and narrow structures. Iron filings generated during post-welding machining easily enter the cavity, and it is difficult to remove. Therefore, add urea to the cavity of the part before machining, and then fill and seal the cavity with paraffin wax to prevent the excess from entering. After the machining is completed, soak in hot water to remove paraffin wax and urea. The removal time generally takes 20 hours In this process, the material of the bearing bush on the supporting casing is 2Cr3...
Claims
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CPCB08B13/00
Inventor 邱树彬侯艳波郑忠俊涂泉赵海唐文仲陈姣赵劲石肇熊
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD