Feedback rod inner cone high-precision angle measurement method and auxiliary measurement device
A technology of auxiliary measurement and feedback rod, which is applied in the direction of measuring devices, greenhouse gas reduction, instruments, etc., can solve the problem of limited measurement means, insufficient measurement accuracy and detection efficiency to meet production needs, and measurement trajectory that cannot be consistent with the reference axis, etc. problem, achieve the effect of improving measurement accuracy and reducing measurement cost
Active Publication Date: 2020-11-06
CHANGCHUN AVIATION HYDRAULIC CONTROL
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Problems solved by technology
If profile measurement is used, the measurement trajectory cannot be consistent with the reference axis. If a three-coordinate measuring machine is used, the inside of the small and micro cavity cannot be collected. At this stage, the measurement methods are limited, and the measurement accuracy and detection efficiency are not enough to meet the production needs.
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[0048] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0049] see Figure 1-Figure 9 , the present invention provides a high-precision angle measurement method and auxiliary measurement device for the inner cone of a feedback rod, the specific contents are as follows:
[0050] The shape tolerance requirements of the inner taper angle of the feedback rod, such as figure 1 As shown in the technical requirements of the feedback rod, when the opening angle changes around A°, the pressure difference between the two receiving holes has a downward trend. Therefore, the drawings require A°±10′ to be qualified; if a profiler is used to measure, the measurement track cannot be consistent with the reference axis, and if a three-coordinate measuring machine is used, the inside of the small and micro cavity cann...
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The invention discloses a feedback rod inner cone high-precision angle measurement method and an auxiliary measurement device, which relate to the field of electro-hydraulic servo valve feedback rod inner cone high-precision angle measurement. In the prior art, according to the shape tolerance requirement of an inner cone angle of a feedback rod, when the opening angle changes around SLSE, the pressure difference of two receiving holes has a descending trend; the drawing requires SLSE+ / -10', that is, the measured inner cone angle is qualified between XX degrees and XX degrees; if profile tolerance measurement is used, the measurement track cannot be consistent with the reference axis, if a three-coordinate measuring machine is adopted, the interior of the small micro cavity cannot be collected, the measurement means at the present stage is limited, and the measurement accuracy and the detection efficiency are not enough to meet the production requirements; under the condition that hardware of measurement means conditions is not changed, a reasonable and efficient measurement scheme is provided, error sources of measurement results are analyzed, the two measurement methods are combined, a reasonable mathematical algorithm is applied, a scientific data analysis and processing scheme is matched, and finally high-precision angle measurement of the feedback rod inner cone is completed.
Description
technical field [0001] The invention relates to the field of high-precision angle measurement of an inner cone of a feedback rod of an electro-hydraulic servo valve, in particular to a method for measuring a high-precision angle of an inner cone of a feedback rod and an auxiliary measuring device. Background technique [0002] According to the simulation results of the feedback rod, the corresponding relationship between the pressure difference between the two receiving holes and the opening angle of the V-shaped groove of the feedback rod is not proportional, and the opening angle of the V-shaped groove has a great influence on the pressure difference between the two receiving holes. When the opening angle of the V-groove of the feedback rod is "SLSE", the pressure difference between the two receiving holes is the largest, so that the valve core can obtain a greater driving force, and the oil driving force overcomes the friction force and hydraulic force between the slide va...
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Login to View More IPC IPC(8): G01B21/22
CPCG01B21/22Y02E30/30
Inventor 朱运邰炳芳姚世琦运航
Owner CHANGCHUN AVIATION HYDRAULIC CONTROL