Design And Analysis Of Double Helical Gear Transmission System For High Power Drilling Pump

Drive high power three cylinder single action drilling pump power is the most common single herringbone gear,herringbone gear is located between the middle and the end of any crank crank power on the crankshaft is only one input path,the large gear hub on the crankshaft has been in the maximum stress state of the crankshaft is easily to be damaged.In order to make the crankshaft uniform stress and reduce the stress concentration,part of the new high power three cylinder single acting reciprocating drilling pump adopts a double helical gear transmission system,which uses two pairs of meshing helical gear transmission power on the crankshaft and the transmission shaft.In this paper,the transmission system of high-power drilling pump double helical gear as the research object,analyzing the characteristic of force transmission system,the key components of transmission system of checking of strength and stability,and to analyze the torsional vibration of crankshaft system simulation.According to the simulation results of crankshaft torsional vibration,the size of crankshaft is redefined to meet the requirement of normal operation.The research work of this paper mainly includes the following aspects:The force analysis of the double helical gear transmission system,deduces the piston rod,connecting rod thrust force,two helical gear meshing force and mathematical expressions of crankshaft journal bearing spindle ends force force;According to the requirements of the basic performance parameters of three cylinder single action drilling pump,designed the structure and size of the key parts of the power end of the drilling pump,and the establishment of three-dimensional parts of the power end in SolidWorks,to complete the assembly;The mathematical expression of the force transmission system will be obtained before in the compiled MATLAB program,and then the parts parameters,calculate the size and direction of the force on the crankshaft drive system under the condition of arbitrary angle double helical gears,and draw the curve part of the force with crankshaft angle.After that,the strength of the key parts of the transmission system is checked and the stability is checked;The analysis of crankshaft torsional vibration simulation,calculate the steady-state response of torsional vibration of crankshaft system natural frequency,vibration mode and a critical speed and crank shaft,according to the steady-state response curve of crankshaft torsional vibration in the case of the maximum torsional stress,and crankshaft strength check,according to the result of strength check to determine the size of the crankshaft.The research content of this paper has an important reference value for the analysis of the double helical gear transmission system of the three cylinder drilling pump,and has certain guiding significance to the study of the strength and torsional vibration of the crankshaft of the drilling pump.