The Stress Analysis And Optimization Of3Zb-265Type Plunger Pump Casing

Cementing is an important step in the process of drilling, and cementing pump is an important equipment in cementing operation, and the three plunger pump is the mainstream of domestic and foreign cementing stage cementing pump. Oil is a strategic resource, with the petroleum resources especially for offshore oil resources more scarce, many countries speed up on the deep-sea oil exploration and exploitation. The three cementing pump plunger has put forward higher requirements, mainly reflected in the pressure, pressure is more and more high, capacity is more and more big, more light weight, the volume is more and more small, the cost as low as possible.Three plunger cementing pump of this research is the radial piston pump, using the crank and connecting rod drives the three piston reciprocating motion, with the help of the reciprocating movement of the piston to the working chamber volume in the liquid cylinder working chamber vary periodically, feed----discharge pressure.In the case part of plunger pump, used abroad is integral precision casting, good rigidity, seismic performance. The crankshaft is made using a straight shaft and the eccentric wheel with precision casting technology, good rigidity, dynamic performance and. Self-aligning ball bearing using the error caused, can compensate concentricity and deflection. The crosshead sliding surface, is used in the surface hardened and precision grinding technology, good wear resistance, excellent sealing performance.In case part of piston pump, the domestic is used in steel plate welded structure, stress-relieved after welding, the integral casting accuracy, poor seismic performance. The crankshaft is used after forging, machining center by once clamping completed processing, precision method than the straight shaft and the eccentric wheel with precision casting is bad, not good rigidity. This also resulted in the domestic production of the three plunger pump is generally poor performance of foreign products.This topic comes from Sinopec Group Jianghan Petroleum Administration Bureau fourth petroleum machinery factory from the United States of America bought a pressure pressure up to three of150Mpa cementing pump plunger, by removing, measurement, drawing method, according to the proportion of1:1, made a three plunger cementing pump. In the experiment, the measurement to the maximum output pressure pressure is about50Mpa, far less than foreign product of150Mpa.This subject is from the important parts of the three plunger pump casing and cementing of support by starting force deformation and strength, is modeled by UG6.0software, and then using the data interface model is imported into ANSYS12.0software, finally shell and the support part of the three piston pump mesh and load. The stress field and the materials used in a comparison with stress, find out the problem, and the optimization results, propose solutions.In this paper, to provide theoretical help for domestic production enterprises of the three plunger pump. A positive role on improving the cementing between domestic three plunger pump performance and quality of products, shorten the gap with foreign technology. At the same time, the national undersea exploration, especially the strategic oil plays a key role.