What Is The Hydraulic Fittings
The importance of hydraulic fittings that we need to know.Hydraulic valve is a pressure
oil operations with automation components, it is subject to the oil pressure control valve pressure control, and electromagnetic pressure control valve is usually used in combination, can be used for remote control station oil, gas and water pipeline system off.
Used to reduce and stabilize the system, a branch of the oil pressure, commonly used in the clamp, control, lubricating oil circuit. Model and pilot a direct action of sub-type, multi-use precursor type.
Introduces the classification of hydraulic fittings valves. Hydraulic fluid pressure used to control the flow and direction of the hydraulic fittings. Which control the pressure as the pressure control valve to control flow is called flow control valve to control flow through called off and directional control valves.
By use of pressure control valve into valve and relief valve sequence valve. Relief valve: to control hydraulic fittings system to which it is set in a constant state of stress. The relief valve as safety valve for overload protection. When the system fails, the pressure increases to limit possible damage value, the valve opens and the overflow port to ensure the security of the system. Regulator: the branch circuit to control the main loop than is the stability of the oil pressure down. The pressure control valve according to its different functions, can be divided into constant pressure reducing valve (output pressure of constant value) or worse valve (the pressure difference of input and output value) and fixed ratio valve (between input and output pressure to maintain a certain ratio). Sequence valve: can an executive component (such as hydraulic fittings cylinders, wear, motor, etc.) after the action, and then the implementation of components in order to make other moves. Pump the pressure first campaign to promote the hydraulic cylinder 1, also by order of the role of the inlet valve in area A, when a campaign completely into the cylinder, the pressure increases, the role of the upward thrust in the area of A is greater than the adjusted spring fixed value, the spool up to the inlet port connected with the oil, so that movement of hydraulic cylinder 2.
Flow control valve spool and an adjustment between the throttle body area and it generates the local resistance to the flow is regulated to control the velocity of actuators. By use of flow control valve is divided into five kinds. Throttle: Throttle area in which it is set, after little change in the load pressure and motion even less demanding implementation of the components of velocity are basically stable. Control Valve: pressure changes in the load when the throttle valve to maintain the pressure drop for the given value. Thus, it is set after the orifice area, regardless of how the changes in load pressure, control valve can maintain constant flow through the throttle, so that the velocity of actuators stability. Shunt valve: no matter loads, make the implementation of the same oil source of the two components are equal for equal flow diversion valve or simultaneous valve; be prorated for the proportion of shunt flow valve. Set flow valve: the role of contrast with the shunt valve to flow into the set of proportion to the flow valve. Collecting shunt valve: both shunt valve and flow valve assembly of two functions.
Is divided into directional control valve by one-way valve and valve use. One-way valve: only allows one-way fluid in the pipe connected to the reverse that is cut off. Valve: change between different pipeline through off relations in accordance with the work of the spool valve position in a few minutes 2,3, etc;the number of channels under the control of two-way communication.Three Five-, etc.; spool drive under way points manually, electrically powered, motor and other hydraulic fittings. Figure 2 shows the working principle of the three four-way valve. P for the oil port, O port for the oil return, A and B is the path to implementation of the components of the output. When the spool is in the medium, cut off all oil port, the implementation of the fixed component; when the spool when moved to the right places, P and A Link, B and O links; when the spool when moved to the left position, P and B Tong, A and O links. Thus, implementation of the components can be reverse movement is.
The late 60s, some of these hydraulic fittings control valve further developed based on electro-hydraulic proportional control valve. Its output (pressure traffic) can change with the input electrical signal.The importance of hydraulic fittings that we need to know.Electro-hydraulic proportional control valve according to different functions, accordingly, is divided into electro-hydraulic proportional pressure control valve hydraulic proportional flow control valves and electro-hydraulic proportional directional control valve.
by: sansan
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