潘祖军

摘要江苏1204拖拉机液压输出功率，在试验时，出现输出功率不足的问题。对实验数据分析，影响液压功率的两个因素流量和压力，从元件品质来看，可能是齿轮泵的容积效率以及系统低压区漏气的问题，从设计角度分析，则可能是吸油管及其管路元件结构参数的选择问题。如何确定系统元件的参数即吸油管等元件的参数，按规范设计是基本的要求;之后，才是根据实际情况，再优化设计和超越规范设计。对试验中出现的问题，查找应遵守逻辑原则，涉及到实物分解时，则是先易后难，最终找到问题的原因予以解决。

关键词拖拉机液压输出功率齿轮泵容积效率吸油管

Jiangsu 1204 Tractor Hydraulic Output Power Shortage Problem

PanZujun

（Jiangsu Qingtuo Agricultural Equipment CO., Ltd. ,Huaian,Jiaingsu223005,China)

Abstract: This is about the power output of Jiangsu1204 tractors Hydraulic pressure. In the test, the problem is the lack of output power. Analyzing the experimental data, the two factors that affect the hydraulic power flow and pressure, from the point of component quality, may be the problem of volumetric efficiency of the gear pump and leakage of systematic low-pressure area, which, analyzing from the design angle, could be selection problem of suction tubing and structure parameter of its pipeline route. How to make sure of the parameters of the system components, which may be the parameters of suction pipe and some other components，is to design according to the standard which is the basic request. And the second request is optimized design and ultra-standard design according to the actual situation. To find the problems arising from the test, we shall comply with the principles of logic. When it comes to the decomposition of physical, we shall do first things first. And finally the cause will be found and the problem to be solved.

Keywords:tractor；hydraulic power output；gear pump；volumetric efficiency；oil inlet

0引言

现在的拖拉机大多配有液压输出装置，主要为拖拉机辅具或其它机具提供液压动力。液压动力源一般由发动机预留接口连接的齿轮泵提供，或变速箱内置齿轮泵提供。由分配器提供单点单路液压输出，也有通过多路阀提供的双点多路液压输出。液压输出功率是拖拉机基本的技术参数之一 。根据农业机械推广鉴定大纲DG/T001-201的要求，最大液压输出功率与发动机标定功率之比≥12%。江苏1204拖拉机液压输出，是由发动机上一台CBN-E325齿轮泵和拖拉机上的一台DLS-L15E多路阀提供。试验时，液压输出功率不足，最大液压输出功率与发动机标定功率之比只有8%，低于DG/T001-2011要求的12%。通过对实验数据和液压系统分析，找出原因予以解决。

1数据计算

与多路阀一联上的两个油口相连，通过一对液压接头对的最大有效液压功率试验：分别测量两个接头的输入压力和回油压力，测量流量，计算有效液压输出功率,见图1，测量数据如表1。……