A multi-layer force value sensor and its measurement method for tensile testing machine

Abstract

A multi-layer force value sensor for a tension tester comprises pressure cylinders, sensing springs, limiting flanges and displacement sensors. Each pressure cylinder is a cylindrical body with big-end-up counter bores in the upper end face and the lower end face and with a longitudinal section similarly in an H shape. An outer flange is arranged at the lower end of each pressure cylinder. An axial groove is formed in each outer flange. The lower end of one pressure cylinder is inserted into the upper counter bore in another pressure cylinder to form a multi-layer multi-cavity tower-shaped structural body with closed pressure cavities. The sensing springs are vertically placed in the closed pressure cavities. The limiting flanges are arranged on the outer circles of the pressure cylinders in a sleeving mode to be fixedly connected with the flat faces of the upper ends of the pressure cylinders which are inserted into the limiting flanges. The axial grooves formed in the inner circumferential faces of the limiting flanges are the same as the grooves in the outer flanges of the pressure cylinders. One ends of the displacement sensors are placed in the axial grooves formed in the inner circumferential faces of the limiting flanges, and the other ends of the displacement sensors are placed in the grooves formed in the outer flanges of the pressure cylinders. The multi-layer force value sensor has a wide range for adjusting the force value sensor measurement range and the measurement interval and also has high overload resistance capacity.

Description

technical field [0001] The invention relates to a force sensor, in particular to a force sensor of a marine anchor chain tension testing machine, and belongs to the field of mechanical measurement sensors. Background technique [0002] The anchor chain tensile load test is to directly clamp the anchor chain to the anchor chain tensile testing machine for tensile load test. On the same machine, not only the tensile test of the large-tonnage anchor chain is carried out, but also the small-tonnage anchor chain is also tested. Tensile test: According to the requirements of the national standard GB / T549-2008, the same anchor chain should not only be subjected to a working tensile load test to ensure that the permanent elongation of the anchor chain should not exceed the original length under the tensile load specified in "5.3... 5%,” In addition, it is necessary to carry out the breaking load test. The so-called anchor chain breaking load test refers to: according to the standard...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems and defects of the existing force sensor with narrow measuring range, overload and lack of protection, and at the same time, to meet the requirements for use on the anchor chain tensile testing machine, to provide a multi-layer force sensor for tensile testing machine and its Measurement methods

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