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Calibration method and measurement method of starting friction moment measuring instrument pressure value

A friction torque and measurement method technology, applied in the direction of force/torque/work measuring instrument calibration/test, measurement device, instrument, etc., can solve the problem of inaccurate pressure scale value, low start-up friction torque measurement efficiency, complicated calculation process, etc. problems, to achieve the effect of accurate assessment, saving operation links and measurement time, and improving detection efficiency

Active Publication Date: 2019-01-11
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems of low measurement efficiency, cumbersome calculation process and inaccurate pressure scale value after the glass container is damaged, and provide a calibration method and measurement method for the pressure value of the starting friction torque measuring instrument.

Method used

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  • Calibration method and measurement method of starting friction moment measuring instrument pressure value
  • Calibration method and measurement method of starting friction moment measuring instrument pressure value
  • Calibration method and measurement method of starting friction moment measuring instrument pressure value

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specific Embodiment approach 1

[0030] Specific implementation mode one: the following combination figure 1 , figure 2 and image 3 Describe the present embodiment, the measuring method of starting friction torque measuring instrument pressure value described in the present embodiment, the specific process of this measuring method is:

[0031] Step 1. Obtain the air pressure value F according to the standard value of the friction torque and the length of the arm;

[0032] Step 2. Mark the position corresponding to the air pressure value F and the liquid level on the glass container through the electronic balance;

[0033] Step 3. Calibrate the rotating column of the measuring instrument through the level to keep the measuring instrument in a horizontal state;

[0034] Step 4. Place the bearing under test at the measurement position, place the measuring load device on the bearing stably, keep a distance of 20mm between the air pressure nozzle and the pressure receiver, make the centers of the nozzle and t...

specific Embodiment approach 2

[0041] Embodiment 2: This embodiment further explains Embodiment 1. The specific process of obtaining the air pressure value F described in step 1 is: Substituting the friction torque standard value Mtp and the arm length L=8cm into the friction torque calculation formula Mtp=F× L, get air pressure value

[0042] In this embodiment, the friction torque standard value Mtp is obtained by consulting the technical standards, the unit is g.cm, the unit of the air pressure value F is g, and the length of the force arm is the distance between the center of the pressure receiver and the center of the load rotation axis, which is a fixed value 8cm.

specific Embodiment approach 3

[0043] Embodiment 3: This embodiment further explains Embodiment 1. The specific process of keeping the measuring instrument in a horizontal state as described in step 2 is: place the level on the upper end surface of the rotating column of the measuring instrument, and rotate the adjustment level below the base. Props so that the balance point of the level is within the center range.

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Abstract

The invention discloses a calibration method and a measurement method of a starting friction moment measuring instrument pressure value, belonging to the technical field of bearing detection and usedfor solving problems of low efficiency, tedious calculation process, inaccurate pressure scale value after damage of a glass container of the existing starting friction moment measurement. In the measurement method of the starting friction moment measuring instrument pressure value, a measurement load device is placed on a tested bearing, a scale on a rotary column is aligned with a pedestal fixedpointer, and a pneumatic nozzle is placed to be opposite to a pressure receiver; if the pressure receiver rotates a range greater than or equal to the scale value on the pedestal relative to the pedestal, the friction moment is qualified, and otherwise, the friction moment is not qualified; and the friction moment of ten mark points is measured. The calibration method comprises the following steps: placing the air pressure nozzle vertically down 20mm from a precision electronic balance, opening a three-way valve, enabling air source pressure to increase from 0.1g, obtaining an actual pressurevalue through the precision electronic balance, and then, calibrating a position of the pressure scale value of the glass container. The calibration method and the measurement method are used for detection of aeronautical instrument bearings.

Description

technical field [0001] The invention relates to a calibration method and a measurement method for the pressure value of a starting friction torque measuring instrument, belonging to the technical field of bearing detection. Background technique [0002] Aeronautical instrument bearings have high requirements for the flexibility of bearing rotation. In the standard, the technical index of starting friction torque is used to determine whether the flexibility of bearing rotation meets the use requirements. In order to measure the starting friction torque quickly and accurately, it is proposed to Calibration method and quick measurement method of indicator. [0003] The measuring instrument is driven by compressed air, and the reading value of the torque is calculated according to the value displayed on the barometer, and the torque value is in g.cm. Measuring instruments include movable ring and base column with nozzle, glass container air pressure indicator, measuring load de...

Claims

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Application Information

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IPC IPC(8): G01L25/00
CPCG01L25/00
Inventor 孙怀全徐雷杨志军廖子华赵立新刘红莉张长之金宏宇宮凤然
Owner AVIC HARBIN BEARING
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