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MindMap Gallery Hydraulic control components

Hydraulic control components

Hydraulic control element, hydraulic valve is a control element in the hydraulic system that controls the flow direction, pressure level, and flow rate of the liquid; the directional control valve can control the direction of the liquid flow, thereby changing the movement direction of the actuator.

Edited at 2023-10-22 15:05:34

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Hydraulic control components

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Outline

Hydraulic control components

Overview

Hydraulic press function

Hydraulic valve is a control component in the hydraulic system that controls the flow direction, pressure level, and flow rate of the liquid.

Hydraulic press classification

According to use

Pressure control valve Flow control valve Directional control valve

Operation mode points

Manually operated valve Mechanically operated valve Electrically operated valve

Connection method points

Tubular connection Format and stacked connection Plug-in connection

According to structure

Slide valve Seat valve Jet tube valve

Press control mode

Electro-hydraulic proportional valve Servo valve Digital control valve

Classified by output parameter adjustability

On/off control valve, valve with adjustable output parameters

Basic requirements for valves in hydraulic systems

1Reliable work, sensitive action, small impact and vibration

2. Small pressure loss

3. Compact structure, easy to install, maintain, adjust and use, and has good versatility.

Directional control valve

effect

Control the direction of fluid flow to change the movement direction of the actuator

Classification

One-way valve

Ordinary one-way valve

structure

Valve body, valve core, spring, etc.

effect

Only one hydraulic flow is required, and the reverse direction is blocked.

Require

Small forward flow resistance, no reverse flow, good sealing Opening pressure: 0.03～0.05MPa

Hydraulic control check valve

composition

Botong one-way cylinder small piston cylinder

Features

a When there is no control oil, it is the same as the ordinary one-way valve.

The b-pass control oil can be passed in both forward and reverse directions.

Directional valve

structure

Manual reversing valve

Motorized reversing valve

Solenoid directional valve

flow reversing valve

Electro-hydraulic reversing valve

Performance and features

The neutral function of the slide valve

Hydraulic power of slide valve

Hydraulic jamming phenomenon

pressure control valve

Classification

By use

relief valve

Hydraulic system performance requirements for relief valves

High constant pressure accuracy

Sensitivity should be high

Work should be smooth and free of vibration and noise

The seal should be good and the leakage should be small when the valve is closed.

structure

Direct acting relief valve

Pilot operated relief valve

performance

static performance

Pressure control range

Opening and closing characteristics

Unloading pressure

dynamic performance

Pressure reducing valve

sequence valve

Balance valve

Unloading valve

Press the spool

slide valve

ball valve

poppet valve

According to working principle

Direct acting

Pilot type

flow control valve

Throttle valve orifice

Thin-walled holes

elongated holes

Thick walled holes

Ordinary throttle valve

structure

Axial triangular groove type

form

needle orifice

Triangular slot orifice

Rotary orifice

Throttle valve pressure compensation

1 A speed regulating valve is formed by connecting a fixed difference pressure reducing valve and a throttle valve in series.

Combine the pressure stabilizing relief valve and the throttle valve in parallel to form a relief throttle valve

Stacked hydraulic valve

Features

The hydraulic system composed of stacked valves has a compact structure, small volume and mass.

The superimposed valve hydraulic system is easy to install and has a short assembly cycle.

If the hydraulic system changes, the working conditions change, and components need to be added or removed, assembly is easy and quick.

Pipeless connection between components eliminates leakage and vibration caused by oil pipes, pipe joints, etc. ,noise

The entire system is flexible in configuration, neat in appearance, and easy to maintain.

Standardized, universal, and highly integrated

Superimposed speed regulating valve

Stacked relief valve

Two-way cartridge valve

Functional components

Cartridge directional valve functional components

Cartridge pressure valve

Cartridge flow valve

Features

Simple structure, large flow rate, the maximum flow rate can reach 10000L/min

Good sealing, small leakage, small pilot stage function and obvious energy saving

Easy to integrate into ductless connections and easy to standardize

Widely used in large-flow hydraulic systems such as metallurgy, ships, presses, and shaping.

Hydraulic press connection

Pipe connection

Plate connection

Integrated