Fully State Controlled Hydraulic Pumping Unit

Author: Liu Changnian
Publisher:
Publish Date: 2004-03-01
Features: This book is presented in the order required for the design, manufacturing, and debugging of hydraulic pumping units, with a total of 9 chapters. Chapter 1 introduces the characteristics of modern pumping units and several current research directions in hydraulic pumping units. The final chapter provides an overview of the full-state control hydraulic pumping unit, its key technologies, and innovations. Chapter 2 covers the fundamental technology of hydraulic components, summarizing various hydraulic components used in the book in a concise manner. It also maintains the completeness and continuity of the discipline, making it easy for readers unfamiliar with hydraulic component technology to understand and laying a solid foundation for reading the entire book. Chapter 3 explains the basic principles and structural composition of hydraulic pumping units, which is largely based on patent content. Chapter 4 details the design calculations for the full-state control hydraulic pumping unit. Through 39 formulas, it provides design and calculation methods for various specifications of hydraulic pumping units, including parameters for cylinders, accumulators, various valve types, pumps, and motors, with nine product design examples provided at the end. Chapter 5 focuses on a special type of yoke known as the "singular yoke," covering its purpose, principles, and design methods, with a design example provided at the end. The singular yoke primarily addresses the issue of wire rope lifespan caused by an excessively large ratio of the front and rear arms of the pumping unit's beam. To improve cylinder lifespan, the ratio of the front and rear force arms of the beam in the hydraulic pumping unit is set to 4:1, resulting in a smaller rear yoke radius and a significantly reduced wire rope lifespan under bending fatigue. The singular yoke was developed specifically to solve this challenge. Since the full-state matrix of this yoke is rank-deficient, it is considered a singular equation, hence the name. Chapter 6 introduces the principles, characteristics, and calculation methods of rigid connection between the cylinder rod and the beam, specifically using rolling bearing connections, along with the calculation formulas for stroke limits and normalized calculations for rigid connection methods. Chapter 7 covers the global optimization design and calculations for hydraulic pumping units using a singular rear yoke and rigid connections, including maximum value (singular) and minimum value (rigid connection) balancing methods and complete balancing function methods. Chapter 8 discusses the measurement and calculation methods for various losses in hydraulic pumping units and the determination of overall efficiency. Chapter 9 explains the design and calculations for various load simulators of hydraulic pumping units and the entire process of overall debugging. This book includes nine chapters: fundamental technology of hydraulic components, the structural composition of full-state control hydraulic pumping units, the design and calculations for hydraulic pumping units with standard rear yokes, efficiency testing of hydraulic pumping units, and the debugging of hydraulic pumping units.