Development Of Performance Test Apparatus Of Screw Pump Driving Head

A screw pump is a new kind of pumping equipment, which is getting more and more widespread application both overseas and domestically. A screw pump consists of two components: the underground component and the aboveground component. The underground component contains the stator and the rotator that is connected with the sucker rod. The aboveground component is the driving head connected with the wellhead. As it is of smaller volume, lower energy consumption, can be mounted conveniently and suitable of recovering thick oil and oil containing sands and more gases, this kind of pumping unit, consequently, has got widespread application recently. According to the current situation of production technology of domestic screw pump, unstable quality problem of the driving head is exposed in the course of popularizing and applying screw pumps. In order to take a comprehensive performance test to screw pump driving heads, to provide high quality of indexes and parameters for production units, and to be responsible to the manufacture and design branches, it is necessary to develop a test apparatus used specially to test the performance parameters of screw pump driving heads.The main purpose of the test apparatus is simulate the oilfield working condition of driving heads in laboratory, that is, to apply on the torque and axial force needed in actual operation at certain rotational speed. In this condition the performance indexes of driving heads, such as power, efficiency, rotational speed, torque, oil temperature of retarder, dynamic seal performance, working noise, are tested. This provides scientific basis for evaluating the driving performance of screw pumps. This test apparatus mainly includes seven systems: torque applying system, axial force applying system, dynamic seal pressure test system, load-supporting platform and steel structure, power system, control system and computer test system.The work of the paper is composed of the systematic design, mounting, adjustment, service manual, test run, actual test, error analysis, etc of the test apparatus.