A method for measuring the tension of the bale rope of a square baler
A measurement method, the technology of straw bale, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of measuring the tension of the bundled rope, large measurement interval, high cost, etc., and achieve simple test method, high data accuracy, low cost effect
Active Publication Date: 2017-08-25
CHINA AGRI UNIV
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Problems solved by technology
At present, the tying rope used by the baler is mainly polypropylene tying rope. The positional relationship between the tying rope and the rope feeding mechanism and the knotting device of the existing baling machine determines that it is impossible to directly measure the tension of the tying rope online by installing a tension sensor.
After the bale is bundled, the rope is under tension on the bale. At this time, cutting the rope and installing the tension sensor will cause the result to be seriously inconsistent with the actual situation, which is not scientific
However, the traditional three-wheel tension sensor has high cost and a large measurement range, which is not suitable for existing experimental research
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[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0013] The invention provides a method for measuring the tension of a bale rope of a square baler, which comprises the following steps:
[0014] 1) Select a polypropylene binding rope used for a baler, cut several sections of test binding ropes of different lengths from the binding rope, tie the two ends of the binding rope to be tested to form a rope loop 1, and place a Manually tie the α knot formed by the baler at the place, and calibrate the length of each rope ring, and take the lengths of 20cm, 40cm, 60cm, 80cm, 100cm, 120cm, 140cm, 160cm, 180cm, 200cm, 220cm and 240cm. Rope ring for testing.
[0015] 2) Three binding ropes of the same length are taken at each length as three binding ropes for parallel comparison, and the universal material testing machine 2 in the prior art is used to apply a 500N pre-tightening force to the α knot to ensure t...
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The invention relates to a method for measuring the tension of a straw bale rope of a square baler, the steps of which are: selecting a polypropylene rope used for a baler, plying two ends of the rope with different lengths to form a rope ring and tying it into an α rope Knot; use the universal material testing machine to apply pre-tightening force to the α knot; use the SPSS analysis software to perform data fitting on all the tensile load-elongation relationship formulas, and obtain the tensile load of this type of rope ring - Elongation relationship formula; verify the difference in the elongation distribution of the rope ring in each area during the stretching process, and obtain the same elongation distribution in each area of the rope ring during stretching; substitute the obtained elongation into the stretching In the load-elongation relationship formula, the tension of the rope in this area can be obtained. The invention has the characteristics of simple and convenient measurement, high accuracy, low cost, meeting various test objects and various complicated working conditions, and can be widely used in the research fields of balers and bale resilience.
Description
technical field [0001] The invention relates to a method for measuring the tension of a rope on a bale, in particular to a method for measuring the tension of a rope of a square bale in the technical field of a method for detecting the mechanical properties of a bundled straw. Background technique [0002] The collection, storage and transportation of crop straws have always been the primary problem restricting the industrial scale utilization of agricultural biomass resources. The development and development of balers is one of the effective ways to solve the problem of agricultural biomass straw collection, storage and transportation, and meet the industrialized utilization. At present, there are few studies on the resilience of the bale of the baler. The main reason is that it is difficult to obtain the tension of the bale rope on the surface of the bale. The research on the tension of the bale rope on the surface of the bale is a key parameter for selecting the bale rope ...
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IPC IPC(8): G01N3/08
Inventor 韩鲁佳张安琪陈龙健李诚李海涛
Owner CHINA AGRI UNIV