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所在平台: Udemy |
课程主页: https://www.udemy.com/course/how-hydraulic-pneumatic-circuit-works/
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课程名称：液压与气动电路（最佳在线课程） 课程概述： 这门课程非常适合机械工程专业的学生，通过学习这几节课，学生能够轻松追踪液压和气动电路。课程假设学员具备基本的液压和气动元件、符号以及基本运作知识。课程分为三个部分： 第一部分：液压与气动电路的工作原理。 第二部分：典型液压电路的工作原理。 第三部分：典型气动电路的工作原理。 课程中的卸载阀电路视频解释了如何使用卸载阀实现冲床电路的工作。该液压电路也被称为用于冲压应用的高低双泵系统，包含卸载阀、手动操作的4/3弹簧控制直流阀以及两个泵P1和P2。泵P1为恒定低容量高压泵，而泵P2为可变高容量低压泵。由于电路中产生的背压，泵P2的卸载通过卸载阀进行。 减速电路：减速阀是一种由凸轮操作的常开型截止阀。该电路用于在工件加工时在某些点减速机台移动速度。 再生电路用于提高双作用缸活塞的伸出速度。在此电路中，来自缸杆端的流体与泵流量再生，从而使供给气缸盲端的流体体积大于泵流量。 此外，课程将讲解如何追踪气动电路中单作用气缸的工作。气动电路中使用逻辑与控制来操作单作用气缸，采用两个串联的3/2直流阀和一个单作用气缸。 该课程适合希望深入了解液压和气动系统的学生。
This course is useful for Mechanical engineering students and the students will easily trace the hydraulic and pneumatic circuit after going through these lectures. It is assumed that the students are having the basic knowledge of hydraulic and pneumatic components , their symbols and basic working. The course is divided into three sections: The first one is about the working of hydraulic and pneumatic circuit , second one is working of some typical hydraulic circuits and third one is about working of some typical pneumatic circuits.Unloading valve circuit video explains the working of punch press circuit using unloading valve. This hydraulic circuit is also known as High-low double pump system used in punch press application. It uses unloading valve, 4/3 manually operated, spring controlled D.C. valve & two pumps P1 & P2. Pump P1 is constant low volume, high pressure pump whereas pump P2 is variable high volume, low pressure pump. Due to back pressure generated in the circuit, the unloading of the pump P2 takes place through unloading valve.Deceleration circuit: A deceleration valve is a cam operated shut off valve which is normally open type valve. This circuit is used to decelerate machine table movement at certain points when work is performed on work piece.The regenerative circuit is used to increase the out-stroke speed of piston of a double - acting cylinder. In this circuit, the fluid from the rod end of the cylinder regenerates with the pump flow. Due to this volume of the fluid supplied to blind end of the cylinder is greater than the pump flow rate.How to trace pneumatic circuit in case of working of single acting cylinder of a pneumatic circuit. Logic AND control is used in the pneumatic circuit to operate the single acting cylinder. It uses two 3/2 D.C. valves arranged in series and a single acting cylinder.
