A spring force value sensor for tensile testing machine

Abstract

The invention discloses a spring force value sensor of a tension testing machine, which comprises upper and lower pressure cylinders, an induction spring, a limit flange and a displacement sensor. The longitudinal section of the hole is similar to an "H" shaped cylinder, the lower end is provided with an outer flange, and an axial groove is opened on the outer flange, and the lower end of the upper pressure cylinder is inserted into the upper counterbore of the lower pressure cylinder to form a A closed pressure chamber; the induction spring is vertically placed in the closed pressure chamber; the limit flange is sleeved on the outer circle of the upper pressure cylinder and fixedly connected with the upper end plane of the inserted lower pressure cylinder, and the limit The same axial groove is provided on the inner peripheral surface of the flange corresponding to the groove on the outer flange of the pressure cylinder; one end of the displacement sensor is placed in the axial groove provided on the inner peripheral surface of the limit flange , and the other end is placed in the groove opened on the outer flange of the upper pressure cylinder. The invention has wide measuring range and measuring interval and anti-overload capability.

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

At present, the large force sensor of the tensile machine on the market generally uses a wheel-spoke sensor, and the sensor is generally a resistance strain gauge type. Although this sensor has a small measurement volume and high precision, the sensor has a narrow range, so it is not suitable for anchor chain tension. Used on the test machine

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