齿轮泵卸荷槽设计的新方法  

New Method of Gear Pump Unloading Groove Design

作　　者：王建[1] 吴炳胜[1] 马戎 王杰华[1] 

机构地区：[1]河北工程大学机电学院,河北邯郸056038 [2]中国冶金科工股份有限公司国内工程管理部,北京100028

出　　处：《机械传动》2013年第12期73-76,共4页Journal of Mechanical Transmission

基　　金：河北省科技计划项目(12215610D)

摘　　要：当代齿轮泵设计中,通过开设卸荷槽来缓解困油现象是设计工作者的常用手段。而困油面积的变化对卸荷槽的开设起着决定作用。以两个齿轮的压力角为变量,推导出了无侧隙齿轮泵单、双齿困油时的困油面积计算式,结合CAXA软件的使用,计算出了困油面积值;并通过Pro/E 5.0对齿轮泵困油面积进行虚拟测量,两者得到的数值进行比对,验证了计算式的可靠性。通过困油面积计算式可以找到双齿困油时,困油面积的最小位置,这是传统卸荷槽的开设位置。同时,提出了一种只在排油腔开设卸荷槽并配合轮齿卸荷降压槽使用的设计新方案,该方案将卸荷槽开设在单、双齿困油的临界位置,这个位置可以通过CAXA软件找到;通过Fluent12对泵内流场仿真,验证了该方案的可行性。In contemporary gear pump design, common way. The changes of trapped oil area play a setting up unloading groove to ease trapped oil decisive role in unloading groove design. The phenomenon is the calculation formula of the trapped oil area is deduced based on pressure angle of two gears as variable. Combine with CAXA, the value of trapped oil area is calculated. Virtual measuring gear pump trapped oil area is carried out by Pro/E 5.0 and the relia- bility of the calculation formula is verified by contrast of calculated values and measured values. Based on the calcula- tion formula of the trapped oil area, the position where bidentate trapped oil area is the minimum is found. This posi- tion is traditional unloading groove opening position. At the same time, a new scheme of opening unloading groove is put forward. Only open unloading groove in the side of discharge cavity cooperating with gear tooth unloading decom- pression tank. It opens in the critical location of single and double teeth mesh. We can find the location by CAXA. Verify the feasibility of the scheme through gear pump flow field simulation based on FLUENT12.

关 键 词：齿轮泵 困油现象 卸荷槽 困油面积计算式 设计新方案 

分 类 号：TH325[机械工程—机械制造及自动化]