Authors

Abstract

When testing the traction performance parameters of agricultural tires, a variety of combinations of working conditions will be considered due to different soil types, tire parameters, and driving conditions, so a special test equipment is needed to reduce the workload and improve the testing efficiency. For this reason, an agricultural tire traction performance test equipment was developed. According to the test requirements, the hydraulic system with adjustable tire driving torque and travel speed, and a data acquisition system were designed, and the key components were appropriately selected. A mechanical model of the tester’s frame was established, and ANSYS was used to conduct stress-strain analysis of the frame to check whether it could meet the strength requirements for use, and a 6th-order modal analysis of the frame was conducted to determine that there was no resonance problem of the frame under the excitation of the tester’s power source. Taking a 12.4-24 agricultural tire as the test object, the field experiment was carried out according to the Chinese national standard "GB_T14828-2003 Test Method for Agricultural Tire Traction Performance", and the results show that the test equipment is capable of carrying out relevant tests under the conditions of asphalt road, withered grass field and tillage. The stability of the tester is good during the testing, which proves its effectiveness in the traction performance test of agricultural tires. The main technical parameters of the agricultural tire traction performance tester are summarized, including the external dimensions (L×W×H) of 3155mm×1750mm×1385mm, the overall mass of 835.5kg, the fully loaded mass of 1308.5kg, the traveling speed of 0-12km/h, and the fully loaded driving torque of more than 1000N·m.

Abstract in Chinese

在测试农用轮胎牵引性能参数时，需综合考虑土壤类型、轮胎参数及行驶条件等多种工况组合，因此需专用测试设备以减少工作量并提升测试效率。为此，研制了一种农用轮胎牵引性能测试设备。根据测试要求，设计了可调节轮胎驱动力矩与行驶速度的液压系统及数据采集系统，并对关键部件进行了合理选型。建立了测试仪机架的力学模型，利用ANSYS进行应力应变分析以验证其强度是否满足使用要求，并开展六阶模态分析，确认机架在测试仪动力源激励下无共振问题。以12.4-24型农用轮胎为测试对象，依据中国国家标准《GB/T 14828-2003 农用轮胎牵引性能试验方法》开展田间试验。结果表明，该测试设备能够在沥青路面、枯草场地及耕地条件下完成相关试验，测试过程中稳定性良好，验证了其在农用轮胎牵引性能测试中的有效性。设备主要技术参数包括：外形尺寸（长×宽×高）3155mm×1750mm×1385mm，总质量835.5kg，满载质量1308.5kg，行驶速度0-12km/h，满载驱动力矩大于1000N·m。