Mechanical Guru's

APPLICATIONS HYDRONUS   is a door forcing or breaking device is designed to force all steel and regular door type in use today. It is a lightweight door forcer, easy to operate under all conditions. It requires no energy source, making it suitable for both security and fire forces for forcing down steel doors. It is totally a new concept designed by our team. It is lightweight, quiet and very easy operated. All systems can perform where bigger systems will fail to help. It is powerful, reliable and speedy in operation. Its most of the tools are designed to operate by a single person (right and left hand operation), without dependences to electric power or compressed air source. It is having many more applications, which we can see in our daily life. Like it is 1.   UNIQUE FOR SECURITY AND RESCUE FORCES: In rescue operations sometimes our soldiers requires to enter the rescue place silently, quietly, without making any indication. The doors, steel grooved windows,

HYDRAULIC PUMPS 4.1 BASIC             All hydraulic systems have one or more power-driven pumps and may have a hand pump as an additional source of power. Power-driven pumps are the primary source of energy, and may be either engine-driven or electric-motor driven. As a general rule, motor-driven pumps are installed for use in emergencies; that is, for operation of actuating units when the engine-driven pump is inoperative. Hand pumps are generally installed for testing purposes as well as for use in emergencies. In this section, the various types of pumps used in naval aircraft, both hand- and power-driven, are described and illustrated. Hand Pumps Hand pumps are used in hydraulic systems to supply fluid under pressure to subsystems, such as the landing gear, flaps, canopy, and bomb-bay doors, and to charge brake accumulators.   Systems using hand pumps are classified as emergency systems. Most of these systems may be used effectively during preventive maintenance.

HYDRAULIC SEALS The main purpose of the seal is to avoid the leakage of the hydraulic oil from the cylinder weather the piston is in moving condition or not. 1.        SEAL SELECTION Incorrect seal selection is a major cause of seal failure. The following points should be kept in mind when selecting a seal, for either a new application or as a replacement seal: ·          Select a seal that is capable of operating within your desired temperature range. ·          Select a seal that will operate comfortably at your desired pressure and speed. ·          Select a seal that will operate in your system fluid. All of our standard seals are designed for operation in mineral based hydraulic fluids. If you are not using a mineral based hydraulic fluid, please consult our technical staff for a recommendation regarding your application. ·          Keep in mind that designs which incorporate anti-extrusion devices will allow larger metal           to metal clearances. These

HYDRAULIC FLUID 2.1     Introduction Hydraulic fluids, also called hydraulic liquids, are the medium by which power is transferred in hydraulic machinery. Common hydraulic fluids are based on mineral oil or water. Examples of equipment that might use hydraulic fluids include excavators, brakes, power steering systems, transmissions, backhoes, garbage trucks, aircraft flight control systems and industrial machinery. Hydraulic systems like the ones mentioned above will work most efficiently if the hydraulic fluid used has low compressibility. 2.2        FUNCTIONS AND PROPERTIES The primary function of a hydraulic fluid is to convey power. In use, however, there are other important functions of hydraulic fluid such as protection of the hydraulic machine components. The table below lists the major functions of a hydraulic fluid and the properties of a fluid that affect its ability to perform that function. Figure-2.1 Table- 2.1 2.3 COMPOSITION 2.3.1   

HYDRAULIC CYLINDER 1.1        HYDRAULIC CYLINDER A Hydraulic cylinder (also called a linear hydraulic motor) is a mechanical actuator that is used to give a linear force through a linear stroke. It has many applications, notably in engineering vehicles. 1.2      OPERATION Hydraulic cylinders get their power from pressurized hydraulic fluid, which is typically oil. The hydraulic cylinder consists of a cylinder barrel, in which a piston connected to a piston rod moves back and forth. The barrel is closed on each end by the cylinder bottom. These ends are known as the cap end. The cylinder head where the piston rod comes out of the cylinder. The piston has sliding rings and seals. The function of the sliding rings is to prevent the hudraullic oil to move from one side of the cylinder to the other. The seal provides protection to the oil from coming out of the cylinder. The piston divides the inside of the cylinder in two chambers, the bottom chamber (cap end) and the piston