Hydraulic valve multipliers
Hydraulic multiplier, i.e. pressure multiplier, is a device that serves to increase the oil pressure, which is supplied by a pump or hydraulic accumulator. The multiplier consists of a large cylinder with a piston and a smaller cylinder filled with liquid. A smaller pressure cylinder acts on a large cylinder with a piston, while a smaller liquid filled cylinder exerts pressure by a smaller piston connected to a large piston.
Multipliers with hydraulic pumps are connected to agricultural tractors.
Hydraulic pressure boosters (hydraulic multipliers) are used in tensioning and assembly devices. The low pressure of the machine's hydraulics changes according to attitude to the high operating pressure. The inlet pressure and the outlet pressure are directly proportional. Final pressure can be set freely by adjusting the inlet pressure.
Hydraulic valve multipliers can be built into hydraulic aggregates and generate HP (high pressure) pressure up to 700 bar. Whereas at the LP (low pressure) output pressure is generated without multiplication, which results from the setting of the hydraulic pump safety valves.
The hydraulic valve regulates the correct flow of liquid medium (usually oil) through the hydraulic system. The direction of oil flow depends on the position of the spool. Correct operation of the hydraulic system depends on the operation of the valves. Size of the hydraulic valve depends on the maximum flow of the hydraulic system through the valve and the maximum pressure in the system.
The sizes of hydraulic valves depend on the destination and place of installation. Installation in hollow conductors, with threaded connections as cassette valves, mounting on a plate or flange mounting is possible. Hydraulic valves can be divided into three main categories, i.e. pressure control valves, flow control valves and directional control valves. Each valve has a different function in the hydraulic system.
The operation of hydraulic valves allows the hydraulic system to be switched at a certain pressure or regulates the direction and flow of fluid through the system. Hydraulic valves operate in different ways due to their specificity. Check valves allow fluid to flow freely in one direction and block flow in the opposite direction. In contrast, the directional control valve is used to transfer the pressure medium in orderly manner and in a certain direction. Pressure control valves switch (or control) at a certain pressure. The regulating valves regulate the flow - it is possible thanks to the adjustment of the size of the holes.
