Processing method for improving flow performance of a lubricating oil pump

Abstract

The invention discloses a processing method for improving the flow performance of a lubricating oil pump. The processing method comprises the following steps: 1, performing repair processing on a middle casing component, and deepening a hole of the casing by 1 m in depth and thinning down a bushing by 0.5 mm in the thickness at the same time to ensure that a gear cavity of the middle casing is deepened by 1.5 mm in the total depth; 2, changing the width of a gear provided with an impeller from 15 mm to 16.5 mm; 3, rotating a threaded pin fixing position of the bushing of the middle casing by an angle of 45 degrees relative to the original fastening position for fastening, and fixing in a punching manner; plugging an original hole through which a threaded pin is taken out by an M4 threaded pin; 4, testing running-in, leak tightness and flow performance of an improved lubricating oil pump on a tester and performing long-term test run and examination in an engine plant. The method has the benefits that seen from the implementation effect of the technology, the method is relatively simple and easy in operation and good in effect; after repair, the flow of the lubricating oil pump is improved by 11% to 13%, so that the technical requirements on use of an engine can be met, and the effect of effectively eliminating faults can be achieved; besides, successful implementation of the project fills the blank of repairing of lubricating oil pumps and plays an important role in development of China's national defense.

Description

technical field [0001] The invention relates to engine repair technology, in particular to a processing method for improving the flow performance of lubricating oil pumps. Background technique [0002] The lubricating oil pump is a key component of the aero-engine lubricating oil system. As an important component providing power in the lubricating oil supply system, its working performance directly affects the working condition of the entire lubricating oil system. The flow rate of the lubricating oil pump is an important parameter to evaluate its performance. Low flow rate of the lubricating oil pump will lead to low lubricating oil pressure, high lubricating oil return temperature and other lubricating oil system failures, which will seriously affect the use and safety of the engine. [0003] The lubricating oil pump consists of front, middle and rear housings, gears with impellers, primary booster pumps, primary oil return pumps, bypass (pressure regulating) valves, trans...

AI Technical Summary

Problems solved by technology

Reflected in the performance of the lubricating oil pump, the flow performance declines, the leakage increases, and the pass rate is low, which brings greater difficulty to the repair of the lubricating oil pump.

Because the lubricating oil pump is imported from Russia, the surface structure is relatively complicated, and there is no such product in China, so it cannot be directly replaced

At the same time, foreign parties have no effective measures to restore the flow performance, and there is no performance repair technology of similar materials and structures in China, which greatly affects the normal use of the engine.

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