What is Hydraulic (Hydraulic) do the lift job

Hydraulic is that with the mechanical properties of the fluid. In engineering, it involves the fluid power but the hydraulic that we will discuss here is about that. "Hydraulic fluid transmission or hydraulic fluid transmission." Most hydraulic transmission systems have two types of actuators: - Hydraulic Cylinder (Hydraulic Cylinder) is a device that works in linear motion (Linear). - Hydraulic Motor (Hydraulic Motor) is a device that works in the radius (radius) In the hydraulic jack system we see most of what we use is work (W, Force), or force (F) caused by the hydraulic system, such as the force from the cylinder. Hydraulic Cylinder to compress or cut the workpiece and driving, such as the rotation of the hydraulic motor to rotate the rotation of the machine equipment. Figure 1 Hydraulic Motor (Hydraulic Motor) Figure 2 Hydraulic cylinder (Hydraulic Cylinder) Advantages of hydraulic systems. Hydraulic equipment is a component of many types. This is because the advantages of some hydraulic devices are as follows. 1. Working device (Actuator) Smaller and lighter than electrical devices and mechanisms. Also, there is no complexity, as shown in Figure 3, and can be designed to be very strong compared to the size of the machine. By designing high pressure hydraulic oil. In the case of extreme strength, see Figure 4 for an idea of ​​the system design of a hydraulic lifting crane with hydraulic piston lifting. Figure 3 compares hydraulic equipment and mechanical equipment. Figure 4. Hydraulic applications. 2. Easy to Control Because the mechanical control system requires a lot of pivot points, many joints and chains may be required. It makes it difficult to create, edit and adapt. For hydraulic systems, only the pump unit, the directional control valve, the actuator, and the hose and piping are needed. Very easy. Figure 5 shows the necessary equipment used to control the hydraulic system. Figure 5. Hydraulic control device. Figure 6 compares mechanical and hydraulic controls. 3. Easy to Load Control If we install a Relief Valve into the circuit, it can help prevent high voltage fluctuations in the circuit and also make the pressure control work well. Prevent damage to hydraulic equipment caused by high pressure and constant pressure control. As a result, the force from the actuator is constant. From Figure 7, the pressure release valve will be able to control the system pressure not to exceed the desired level. From the structure of the device can be built and installed. Repair and fix more easily than mechanical equipment. Figure 7 Relief Valve 4. Easy to add working device. It can be easily added to the device by simply adding a link and inserting an actuator into the device. It can be used immediately without having to make any changes to the circuit. Figure 8. Connectors for extra equipment. Hydraulic Principle of Operation 1. The closed system voltage is equal in all directions. The pressure that flows through the fluid to the wall of the container is the same in all directions, regardless of the shape of the container is simple or complicated as Figure 9 if we use. The syringe with 1 square centimeter pressure on the plunger of the syringe with a force of 2 kg. The pressure of the hydraulic oil obtained from this action is 2 kg / cm3 and if the force This pressure is passed through a pipe to a hydraulic cylinder with a ground. Users of the piston cylinder hydraulics 30 sq. Cm of pressure cylinders in the same direction to make the Pistons a force of 60 kg. Fig. 9 The pressure in the system is equal in all directions. Figure 10 forces occurring in the system more or less depending on the cylinder area. As in Figure 10, therefore, in hydraulic systems, how much we need the hydraulic cylinder to do is by designing the cylinder to have as much cutting space as needed or using a pump that is available. High pressure From the figure, the relationship between the force of the cylinder and the syringe is in the form. P = F1A1 = F2A2 = Constant ......... (1) When F1, A1 and F2, A2 is the force acting on the cylinder (F) and the cylinder cross sectional area (A) in the syringe, as in the sample. And if we want more force in the cylinder, we can do more by increasing the cylinder cross section or increasing the pressure on the cylinder. 2. Flow Rate of Hydraulic System Flow Rate (Q) is the rate of movement of hydraulic oil in volume or weight per unit time. As shown in Figure 11, it is generally measured as the volume of flow per unit time in minutes or seconds. But the most commonly used is l / min if the cylinder is the same diameter. Cylinders with higher flow rates will move faster. We can compare the speed of different flow rates. Figure 11 shows fluid flow. Figure 12 compares the different cylinder sizes. Figure 12 compares the piston's displacement of two cylinders with the same cross-sectional area. But the flow rate of hydraulic oil is not the same from the equation.