Rotor axial force measurement device and measurement method

A technology of measuring device and measuring method, which is applied in the direction of measuring device, force/torque/work measuring instrument, instrument, etc., can solve the problem that the axial force of the rotor cannot be measured, and can overcome the inability to measure the axial force and simplify the axial force. Measurement system, the effect of large-scale promotion and application value

Active Publication Date: 2017-09-26
AECC HUNAN AVIATION POWERPLANT RES INST
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Problems solved by technology

[0005] The invention provides a rotor axial force measuring device and measurement method to solve the existing technical problem that the rotor axial force on the elastic support with the outer ring of the bearing cannot be measured

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  • Rotor axial force measurement device and measurement method
  • Rotor axial force measurement device and measurement method
  • Rotor axial force measurement device and measurement method

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Embodiment Construction

[0034] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] During the working process of the aero-engine, the compressor rotor compresses the gas to do work, which increases the gas pressure ratio, and the gas in turn has a forward reaction force on the blades, and these reaction forces act on the ball bearings through the rotor. Instead, the gas pushes the turbine blades to do work, and the turbine rotor experiences a backward force. For the rotor of the complete aircraft engine, the axial force of the rotor is the resultant force of the forward axial force acting on the compressor rotor and the backward axial force acting on the turbine rotor. The axial force of the rotor must be controlled within a certain range, neither too large nor too sm...

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Abstract

The invention discloses a rotor axial force measurement device and measurement method which are used for measuring axial force of a rotor mounted on an elastic support provided with a bearing outer ring. The elastic support comprises a mounting edge and a free end opposite to the mounting edge, the bearing outer ring is arranged at the free end, and the space between the mounting edge and the free end is partially hollowed-out, so that a plurality of elastic strips distributed in the circumferential direction at intervals are formed. The measurement device comprises multiple strain gauges symmetrically arranged on the elastic strips along the center axis of the elastic support, the stain gauges are connected in series, led out through a signal line and then connected to a strain monitor, and the strain monitor is used for acquiring a measurement result of the axle force of the rotor arranged on the elastic support according to strain output values detected by the multiple strain gauges. The strain gauges are arranged on the elastic strips of the elastic support and connected to form a whole bridge for induction of the axial force of the rotor, no extra appended structure is required, an original axial force measurement system is simplified, and the problem that axial force of the rotor on the elastic support provided with the bearing outer ring cannot be measured is solved.

Description

technical field [0001] The invention relates to the field of measuring the axial force of an aero-engine, in particular to a measuring device and method for measuring the axial force of a rotor. Background technique [0002] Elastic support is widely used in the rotor system support of rotating machinery such as aero-engines. It can effectively reduce the vibration amplitude of the rotor when the rotor passes the critical speed, so that the rotor can work stably and reliably. When the compressor rotor is working, it will generate a forward axial load, and when the turbine rotor is working, it will generate a backward axial load. The axial load must be kept within an appropriate range. Excessive axial load may exceed the allowable load of the bearing, and small axial load will cause the bearing to slip under light load, which will cause bearing wear and failure. Therefore, during the working process of the engine, while monitoring the radial vibration of the rotor, the axial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/12
CPCG01L5/12
Inventor 边杰张春月王平陈亚农梅庆徐友良唐广林利胜
Owner AECC HUNAN AVIATION POWERPLANT RES INST
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