Turbine pump shafting pre-tightening force detection device

Abstract

The invention relates to a turbine pump shafting pretightening force detection device, in particular to a novel structure of a turbine pump shafting part pretightening force detection device based on an elongation method. The turbine pump shafting pretightening force detection device comprises a positioning and clamping mechanism and a measuring mechanism; a turbine pump shafting is installed on the positioning and clamping mechanism, and the measuring mechanism is arranged on the positioning and clamping mechanism. The positioning and clamping mechanism comprises an aluminum profile, the measuring mechanism comprises a contact type displacement sensor, the turbine pump shaft system is arranged on the aluminum profile, the upper portion of the turbine pump shaft system is provided with external threads, a pressing nut is connected to the external threads through threads, the upper portion of the aluminum profile is connected with the contact type displacement sensor, and the contact type displacement sensor is located on the upper side of the turbine pump shaft system. The measuring mechanism further comprises a measuring rod, internal threads are arranged on the upper portion of the turbine pump shaft system, the measuring rod is connected to the internal threads through the threads, and the measuring rod is located on the lower side of the contact type displacement sensor.

Description

technical field [0001] The invention relates to a device for detecting the pre-tightening force of a turbine pump shaft system, in particular to a new structure of a device for detecting the pre-tightening force of a shaft system part of a turbo pump based on an elongation method. Background technique [0002] There are many factors affecting the abnormal vibration during the engine test process. Among them, the size of the preload is directly related to the transmission of the axial force of the hydrogen turbopump shafting parts, and the size of the dispersion affects the smooth operation of the system. The detection of the real preload and ensuring the consistency of the assembly preload are the key links to improve system stability and eliminate abnormal vibration. [0003] At present, the method of torque plus rotation angle is used. First, install the force sensor and pre-tighten the shafting components, record the torque value when the target pre-tightening force is re...

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Problems solved by technology

[0005] 1. The geometric dimensions of the compression nut and the thread on the shaft, the lubrication condition, and the friction of the thread surface all have an impact on the transmitted pre-tightening force, and the pre-tightening force still changes after each reinstallation. The manufacturing quality of related parts can improve the consistency of preload, but it will increase the processing cost and manufacturing cycle

[0006] 2. It needs to be reassembled after each inspection, which not only increases the assembly workload and assembly cycle, but also changes the friction state of the thread after reassembly, and it is still difficult to ensure the consistency of the actual preload

[0007] Due to the above two types of problems in the measurement of the preload force of the turbine pump shaft system by the current method of torque plus rotation angle, it is urgent to develop a detection and analysis system based on the axial preload force of the turbine pump shaft system components to improve the shortcomings of the current detection method

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