工程机械专业英语 4.1 hydraulic components Chapter 4.1 hydraulic components.pptx

Chapter 4.1 Hydraulic components ;Content;;;;6;7;100 KW;;;;1 N/ m2 = 1 Pa 1 kPa= 1 000 Pa 1 M Pa= 1 000 000 Pa 1 bar = 100 000 Pa 1 bar = 1 kg / cm2;;Liquids Have no Shape of their own;Application Principles;Hydraulic Pumps;;Internal gear pump ;Rotary Vane Pump;Balanced Vane Pump ;Radial piston pump;Axial piston pump;Graphic symbols ;Hydraulic Actuators;Axial plunger motors For high quality rotating drive systems plunger motors are generally used. Whereas the speed of hydraulic pumps range from 1200 to 1800 rpm, the machinery to be driven by the motor often requires a much lower speed. This means that when an axial plunger motor is used, a gearbox is usually needed. For a continuously adjustable swept volume, axial piston motors are used. PISTON TYPE.— Like piston type pumps, the most common design of the piston type of motor is the axial. This type of motor is the most commonly used in hydraulic systems. Radial piston motors;Cylinders;Hydraulic cylinders form the heart of many hydraulic systems. It is a common practice to dissemble and rebuild an entire device in the case of hydraulic cylinder repair. Inspection of the leakage issue and scrutinizing cylinder parts (especially the seals) is helpful in recognizing the exact problem and choosing the repair options accordingly. ;The End