Thermal deformation-discordant single-rotor double-thrust bearing axial force testing method

Abstract

The invention relates to a thermal deformation-discordant single-rotor double-thrust bearing axial force testing method. The method includes the following steps that: a strain electrical measurement technology-based single-rotor double-thrust bearing secondary measurement engine refitting and assembly process is put forward; a two-test temperature deformation uncoordinated amount analysis method is established; a two-test double-thrust bearing total axial force test data analysis method is established; and according to test results, a double-thrust bearing axial force equally-shared assembly process is established. Two thrust bearings both bear an axial force of a rotor; in operation, under the axial force of the rotor, the axial force borne by the bearing II is converted, and the axial force borne by the bearing I is increased compared with an assembly state, and an increase value is affected by the axial clearance of the bearing II, the axial stiffness of the bearing I, and the deformation difference of the rotor and a stator under working temperature; and the rest of the axial force is borne by the bearing II. With the testing method of the invention adopted, thermal deformation-discordance-affected single-rotor double-thrust bearing axial force testing can be carried out directly, and testing is simple, and testing results are accurate and reliable.

Description

technical field [0001] The invention relates to a method for testing the axial force of a single-rotor double-thrust bearing with uncoordinated thermal deformation. Background technique [0002] Axial force is the only aerodynamic load that is not accurate in the engine. The actual measurement is the standard at home and abroad. Due to the limitation of the structural size of some engines, one rotor uses two thrust bearings. The axial force test is particularly important in this structure. , it is necessary to determine the assembly parameters according to the test results to ensure that the two thrust bearings can evenly bear the axial force of the rotor. Because testing the axial force needs to change the assembly process of the bearings, in order to ensure the safety of the engine, the two thrust bearings cannot be tested synchronously. There is no research report on the single-rotor double-thrust bearing testing technology considering the thermal deformation incompatibil...

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Problems solved by technology

Because testing the axial force needs to change the assembly process of the bearing, in order to ensure the safety of the engine, the two thrust bearings cannot be tested synchronously, and there is no research report on the single-rotor double-thrust bearing testing technology that considers thermal deformation inconsistency

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