1 Basic Principles of Hydraulic System Design The use of advanced technologies and successful experiences at home and abroad, combined with China's national conditions and the specific use requirements of drilling rigs. Try to be simple and applicable, use the least possible hydraulic components to achieve the various actions of the rig. In this way, the probability of occurrence of failures can be reduced, the energy utilization rate and the reliability of the drilling rig can be improved, and the labor intensity of workers can be reduced. 2 main oil system 2.1 Speed ​​Control Mode and Selection of Hydraulic Pump There are two major categories of speed control methods for hydraulic systems: stepless speed regulation and stepless speed regulation. Stepless speed regulation has a large range of speed adjustment and can meet the requirements of different drilling processes. However, the variable control circuit and the hydraulic pump drive mechanism are more complex. KP3500 hydraulic drilling rig adopts 4 A7V160LV1R constant power variable displacement pumps and 2 sets of 2QJM62-6.3B low-speed high-torque hydraulic motors to form a constant power speed control system. It combines stepless speed change and stepless speed change to broaden the speed range, and There is no need for throttling and flooding at the time of speed regulation, energy utilization is reasonable, efficiency is high, and heat is low. Due to the complex conditions of the drilling rig construction and the varying loads, it is required that the rig can automatically adjust the speed and torque as the load changes, while the constant power variable system can adapt to the requirements of the load conditions, that is, the system can automatically reduce the speed as the load increases. Increase the torque. And can make full use of the source motive power to achieve the best drilling results. The working characteristic of A7V160LV1R constant power variable pump is that its displacement can be adjusted automatically with the change of load pressure to ensure that the input power is close to a constant value. If irrespective of efficiency, the output power N of the motor is basically equal to the input power of the pump, which is also a constant value. It can be known from the motor power formula N=Mn/974 that when N is constant, M and n are in a hyperbolic relationship, ie Under the control of the power variable pump, with the change of the load, the motor output torque M and the speed n are automatically adjusted according to the hyperbolic relationship, which can meet the working conditions. White Touch Screen HVAC Scent Machine White Touch Screen HVAC Scent Machine,Hvac Aroma Diffuser,Hvac Fragrance Diffuser,Hvac Essential Oil Diffuser GUANGDONG GRASSE ENVIROMENTAL TECHNOLOGY CO.,LTD. , https://www.grassearomascent.com