the advantages and disadvantages of the control valve of the hydraulic drive system

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Overview: directional control valve, such valve, such as one-way valve and valve,

etc., used to control the direction of oil flow to the start of the actuatorhydraulic fittings manufacturers

, Stop, forward and backward. Plug-in, such valves without separate body, the

components of the cartridge by the spool and sleeve plug-in plug

Installed prefabricated block hole, plug the block to play a role in the valve body

and piping through the channel in the block a few plug components together,

You into the loop. Usually off valves, proportional valves, servo valves and digital

valve. Switching valve after it is set only in the state it is set.

Proportional valve and servo valve control system parameters according to the input

signal connected or pro rata. Direct control of the digital valve side of the

digital signalhydraulic hose and fittings

System valve action.

Hydraulic system in the implementation of components (such as hydraulic cylinders,

hydraulic oil motor) at work, you need to regularly start, brake, change direction

and

Adjust and adapt to the changes in the external load velocity, so we should have a

set of institutional control and regulation of the hydraulic components, usually

Control valve to complete. It is external is not acting, only used to control the

actuator to meet the host performance requirements.

A control valve according to their functional classification

(1) the directional control valve, such valves, such as one-way valve and valve,

etc., used to control the oil flow direction, in order to achieve implementation of

the components Kai

Move, stop, forward and backward.banjo hose fittings

(2) pressure control valve, such valves, such as relief valves, pressure reducing

valves and sequence valves, etc., used to control the pressure in the hydraulic < br />
system to

Needed to meet the actuator force, torque, or control of the program.

(3) flow control valves, such valves, such as throttle and governor valves, etc.,

for the size of the fluid flow control hydraulic system

In order to achieve the velocity of the actuator.

2, the control valve according to their connection.

(1) tubular connections, tube valve threaded connection, it is directly in series in

the pipeline of the system, does not require a dedicated connection plate.

(2) the connection plate, the plate valve needs a dedicated connection plate valve

with screws installed in the connecting plate on the tube and is connected to a

connecting plate.

Board installed in front of the valve plate, followed by tubing.

(3) flange connection, the flow is greater than 300L/min flanged. In the tube end

welding flanges, screw s and valve

Connection.

(4) Manifold type, Manifold is a general-purpose hexahedral, around the side fitted

with fittings attached to the actuator.

The remaining three sides, install the valve components. Manifold within the channel

connected with the valve, composed of different basic circuit. Following IN manifold

ARE to block

And the connection between the block surface, several Manifold long bolt stacked up,

both the formation of the entire hydraulic system.

Its features are: compact, tubing, easy handling and maintenance.

(5) superimposed on the valve, Modular Valves are standardized hydraulic components

bolt body spliced ​​together with each other directly, Modular Valves

Connection can be composed of hydraulic system. Each stack valves that control the

valve, and strife, the role of the channel body.

It is characterized by: compact structure, less tubing, small size, light weight, no

pipe connections, pressure loss, saving

A lot of tubing and fittings.

(6) Plug-in, these valves a separate body, the components of the cartridge by the

spool and sleeve cartridge in the cartridge block of prefabricated

Hole in the cartridge block to play a role in the valve body and piping through the

channel in the block a few plug components together, you can into the loop.

It is characterized by: very suitable for high flow situations.

3, the control valve according to their manipulation classification

Universal manual, pedal, motor, pneumatic, electric and hydraulic and other ways,

and sometimes a combination of several ways.

4, classified by the working pressure

Control valve in the hydraulic system s working pressure is divided into: low-

pressure valve, the pressure valve and pressure valve.

5, according to the control principle.

Usually off valves, proportional valves, servo valves and digital valve. Switching

valve after it is set only in the state it is set. Proportional valve and

The servo valve according to the input signal is connected to or proportional to the

control system parameters. Digital valve side of the digital signal directly control

valve dynamic

For.