关键词: 圆捆式残膜打包机, 缠网装置, 网绳, 抗摔率, 体积稳定系数

Abstract: In order to solve the problem that the film bales made by the existing film baler are easy to swell and loosen, or even fall apart during transportation, a round bale type net wrapping device is designed. The basic structure and working principle of the netwrapping device are described, and the structural parameters of the key components are determined through the analysis of the force and movement of the net rope. Combined with the structural characteristics of the net wrapping device, a threefactor, threelevel orthogonal test was carried out with the baling roller speed, the number of wrapping turns of the net rope and the initial preload force of the net rope as the test factors, and the bale drop resistance rate and the bale volume stability coefficient as the evaluation indexes. The test results show that the contribution rate to the bale drop resistance is the number of turns of net rope winding, the initial preload force of net rope and the speed of baling roller in descending order, the contribution rate to the bale volume stability factor is the number of turns of net rope winding, the initial preload force of net rope and the speed of baling roller in descending order. Under the condition of ensuring the stability of bale volume and maximizing the bale drop resistance, the optimal combination of working parameters of the net winding device is determined as follows: the baling roller speed is 270 r/min, the number of wrapping turns of net rope is 6, and the initial preload of net rope is 50 N. The field test shows that the operational performance of the net wrapping device is stable and can meet the design and operational requirements. The research results can provide a reference for the design of the web wrapping device of the residual film balers.

Key words: round bale residual film baler；netting device, rope, anti-fall rate, volume stability coefficient