Bearing oil return structure

Abstract

The invention discloses a bearing grease return structure comprising an annular bearing ring cavity arranged outside a bearing in a surrounding mode. The bearing ring cavity communicates with the bearing so as to receive grease lubricating the bearing. A grease return pipe set is connected to the bearing ring cavity and is connected with a grease return pump. The grease return pipe set is used forguiding grease entering the bearing ring cavity into the grease return pump when an engine works normally, and for storing grease after the engine is stopped so as to prevent the grease from being held in the bearing ring cavity. In the bearing grease return structure, no large-volume grease receiving pool structure is needed, therefore no large installing space is needed in a case, the structureof an original engine is not changed, and the number of engine parts and the weight of the engine are not increased. In addition, after the engine is stopped, the bearing grease is stored in the grease return pipe set away from the turbine end, no grease is in the bearing ring cavity, thus grease coking in the bearing ring cavity can be avoided effectively, and then work performance of an enginelubrication system is improved greatly.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a bearing lubricating oil return structure. Background technique [0002] In the fields of aero-engines and gas turbines, a large amount of lubricating oil is required for lubrication and cooling when the bearings are working, and when the machine stops running, a large amount of residual oil needs to be stored. The existing oil collection structure is the structure of the bearing cavity oil collection pool, such as figure 1 As shown, the structure is based on the existing bearing cavity, and the bearing cavity is designed as a large-volume oil collection tank to ensure the collection and storage of residual oil. However, the large-volume oil collection tank requires a large installation space inside the casing to accommodate the oil collection tank; and the design of the oil collection tank will change the original engine structure and increase the number of engine parts and the wei...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a bearing oil return structure to solve the technical problems that the existing oil return structure requires a large installation space, increases the number of engine parts, increases the weight of the engine, and cokes a large amount of lubricating oil in the oil collection pool

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