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为了解决木质螺旋桨的稳定性与变形问题,选用自制的聚氨酯(PU)胶粘剂对榉木层板进行胶接后再加工成螺旋桨。分别对胶接件的力学性能、耐热性、耐寒性、耐水性和耐湿热老化性能等进行了测定,探索了自制PU胶粘剂的最佳工艺条件,并进行了常温、高低温处理后的发动机试车试验。结果表明:自制PU胶粘剂具有较高的综合力学强度及稳定性能(其平均常温拉伸剪切强度和压缩剪切强度分别为8.13 MPa和15.00 MPa,平均高低温拉伸剪切强度和压缩剪切强度分别超过6.50 MPa和7.10 MPa;在水中浸泡20 h或湿热环境中放置24 h后,其平均压缩剪切强度分别为5.85 MPa和11.75 MPa),完全满足木质螺旋桨的使用要求。
In order to solve the problem of the stability and deformation of wood propeller, we choose the homemade polyurethane (PU) adhesive to bond the beech laminates and then process into the propeller. The mechanical properties, heat resistance, cold resistance, water resistance and heat-aging resistance of the adhesive were measured respectively. The optimum conditions of the self-made PU adhesive were explored. The engine at room temperature, high and low temperature Test drive test. The results show that the self-made PU adhesive has a high comprehensive mechanical strength and stability (average tensile tensile strength and compressive shear strength of 8.13 MPa and 15.00 MPa at room temperature, the average high temperature tensile shear strength and compression shear The average compressive shear strength is 5.85 MPa and 11.75 MPa respectively after soaking in water for 20 h or placing in hot and humid environment for 24 h, which fully meets the requirements of wood propeller.