In this paper, analyzed the beam-Pumping unit's main problems of wasting energy and low efficiency in use and researched on a variety of new oil pumping unit status. According to energy-saving pumping unit change direction by ratchet's process requirements change structural, determine the pumping unit's size of the various components. Some Problems such as high Power consumption,low Production,short stroke of walking beam of pumping unit are solved. The main work includes the following several parts:touch the pump body, make way for agencies, balance weight protection, brake mechanism.Firstly, the overall program design of energy-saving pumping unit change direction by ratchet. This pumping unit is made up of supporting frame, ratchet reversing gearbox, touch the pump body, make way for agencies, balance weight protection, brake mechanism. We design all parts of the pumping unit's structure, And give the design method for cam and ratchet of key parts reducer. It works for the motor drive belt, Belt driven ratchet reversing gearbox, Power through the sprocket, chain group and wire rope is passed to the pumping unit, and the pumping unit moves ups and downs as the positive and negative rotation of the drawing machine, finishing the pumping work.Secondly, We wish the polished rod motion law through the design of the gear reducer's cam contour to achieve, established suspension point motion mathematical model for energy-saving pumping unit change direction by ratchet, we proposed rod load size calculation, static dynamometer, dynamic dynamometer, balance weight calculation and balance system of the stress analysis model for energy-saving pumping unit change direction by ratchet.Third, We are design of pumping unit's various components and stress analysis, And using analysis software for mechanical analysis and stability of the machine check, it provide a theoretical basis for pumping unit's.Finally, Through the theoretical analysis and calculation experimental data for the energy-saving pumping unit change direction by ratchet, we can obtained for the energy-saving pumping unit change direction by ratchet help to improve system efficiency and good energy saving effect. China's oil output for the current urgent need for energy conservation, the energy-saving pumping unit change direction by ratchet has important theoretical and practical value. |