论文部分内容阅读
针对高压柱塞泵液缸体开裂问题,对液缸的结构及受力情况进行研究,分析了液缸体的材料、壁厚确定和强度校核方法及安全系数的取值。当液体工作压力在50～70 MPa时,建议液缸选用42CrMo锻造液缸体。结构设计时,注意把液缸体内的高应力集中部位和高压交变载荷区分开来。在制造工艺上采取措施,所有孔的相交处倒圆角R5,并保证内孔的粗糙度Ra≤3.2μm,以减弱应力集中的影响。
Aiming at the cracking problem of high-pressure plunger pump cylinder body, the structure and stress of hydraulic cylinder are studied. The material, wall thickness determination, strength checking method and safety factor value of the cylinder body are analyzed. When the working pressure of the liquid is between 50 and 70 MPa, it is suggested that the 42CrMo forging cylinder be used for the liquid cylinder. Structural design, pay attention to the high-pressure concentrated parts of the cylinder body and high-pressure alternating load to distinguish. In the manufacturing process to take measures, the intersection of all the holes Rounding R5, and to ensure that the inner hole roughness Ra ≤ 3.2μm, to reduce the impact of stress concentration.