Introduction to Hydraulic Tools

A complete hydraulic tool system consists of five parts, namely power components, execution components, control components, auxiliary components, and hydraulic oil.
brief introduction
Hydraulic tools are the organic combination of hydraulic systems and ordinary tools into a whole. Convert powerful hydraulic power into mechanical movements such as reciprocating linear motion, rotational motion, and cycloidal motion. A complete hydraulic tool system consists of five parts, namely power components, execution components, control components, auxiliary components, and hydraulic oil. Hydraulic tools include: hydraulic wrench, electric pump for hydraulic wrench, hydraulic jack, hydraulic bolt tensioner, hydraulic flange separator, hydraulic nut cutter, hydraulic puller, etc. Hydraulic tools have the advantages of high efficiency and convenience.
The function of the power component is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. Refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. The structural forms of hydraulic pumps generally include gear pumps, vane pumps, and plunger pumps.
The function of executing components (such as hydraulic cylinders and hydraulic motors) is to convert the pressure energy of the liquid into mechanical energy, driving the load to perform linear reciprocating or rotary motion.
Control components (i.e. various hydraulic valves) control and regulate the pressure, flow rate, and direction of liquid in the hydraulic system. According to the different control functions, hydraulic valves can be divided into pressure control valves, flow control valves, and directional control valves. Pressure control valves are further divided into relief valves (safety valves), pressure reducing valves, sequence valves, pressure relays, etc; The flow control valve includes a throttle valve, an adjustment valve, a flow divider valve, etc; Directional control valves include one-way valves, hydraulic control one-way valves, shuttle valves, directional valves, etc. According to different control methods, hydraulic valves can be divided into on-off control valves, fixed value control valves, and proportional control valves.
Auxiliary components include oil tank, oil filter, oil pipe and pipe joint, sealing ring, pressure gauge, oil level and temperature gauge, etc. Hydraulic oil is the working medium for transmitting energy in hydraulic systems, including various types of mineral oils, emulsions, and synthetic hydraulic oils.
The principle of hydraulic pressure is composed of two hydraulic cylinders of different sizes, filled with water or oil. The water filled machine is called a "water press"; Oil filled machines are called "hydraulic presses". There is a sliding piston in each of the two hydraulic cylinders. If a certain amount of pressure is applied to the small piston, according to Pascal's law, the small piston transfers this pressure through the pressure of the liquid to the large piston, pushing it up. Let the cross-sectional area of the small piston be S1, and the downward pressure applied to the small piston be F1. So, the pressure of the small piston on the liquid is P=F1/SI, which can be transmitted by the liquid in all directions without changing its size. The pressure exerted on the large piston must also be equal to P. If the cross-sectional area of the large piston is S2, the upward pressure F2 generated by the pressure P on the large piston is PxS2, and the cross-sectional area is a multiple of the cross-sectional area of the small piston. From the above equation, if a small force is applied to the small piston, a large force will be obtained on the large piston. Therefore, hydraulic presses are used to press plywood, extract oil, extract heavy objects, and forge steel.