BSTIND Hydraulic valve magnetic casing welding workshop

Selection of flow hydraulic directional control valves

According to the working condition of the hydraulic system and the characteristics of the dg4v-3 flow control valve to select the flow hydraulic directional control valves, in order to control the velocity of actuators.For example, the implementation of component requires for speed stability, but does not produce crawling, dg4v-3-6c speed hydraulic directional control valves should be selected. In the selection of the specifications of the hydraulic directional control valve, should pay attention to the dg4v-3-6c minimum stable flow rate valve, should meet the requirements of the minimum speed of the actuator, that is, the minimum stable flow rate should be less than the minimum flow required for execution components; if the flow stability requirements are particularly high, or for the case of micro feed, should choose the dg4v-3-2a temperature compensated type valve. In short, whether the choice of the dg4v-3-2c hydraulic directional control valve is correct or not has a great effect on the success or failure of the system.
As a hydraulic designer, should have a more comprehensive understanding of the production of dg4v-3-2a hydraulic directional control valves, in particular, the performance of various hydraulic directional control valves, the replacement of new and old products and replacement. Should also often go to the scene to understand the work of the dg4v-3 hydraulic directional control valve, the only way to achieve the correct and reasonable choice of hydraulic directional control valve.

Selection of pressure hydraulic direction control valve

Pressure hydraulic direction control dg4v3 vickers valve to control the hydraulic system pressure, therefore the selection should be based on the working state of the hydraulic system, the pressure on the requirements and vickers dg4v3 hydraulic direction control valve in the system to the function. For example, in the quantitative pump throttle speed control system, the speed of the implementation of components controlled by the throttle hydraulic direction control valve; in order to maintain the working pressure of the pump is basically constant, should use the dg4v3 vickers overflow hydraulic direction control valve to carry out the regulator overflow; in order to prevent the system overload, the pump can be used in parallel with an overflow valve, for the protection of the pump and the whole system; if there is a decompression circuit in the system, the vickers dg4v3 pressure relief valve must be used to reduce the high pressure circuit to low pressure; if the system uses the pressure to control the action sequence of the components, should use the sequence hydraulic direction control dg4v3 vickers, the pressure value of the sequence valve is set to the required pressure, thereby controlling the action sequence of the parts, and also can use the pressure relay to convert the liquid pressure to the electrical signal, to control the action sequence of the various parts; if you are required to perform the component stably, the back pressure valve should be set up in the loop to form a certain resistance to the oil, which can greatly improve the stability of the execution element. Overflow valve, sequence valve, check valve and throttle valve can be used for dg4v3 vickers back pressure hydraulic direction control valve.

Working principle of hydraulic solenoid valve

Bosch Rexroth 4WE10 hydraulic solenoid valve is a kind of automatic basic components which used to control the flow, belonging to the actuator.Directional hydraulic control valve used to control the direction of hydraulic flow, the plant’s mechanical devices are generally controlled by hydraulic cylinder, so it will be used in directional hydraulic control valve.
The Bosch Rexroth 4WE10 hydraulic solenoid valve has a closed cavity, in which the different position of the hole, each hole connecting different tubing.The middle of the cavity is the piston, the two sides are two magnets, which the magnet coil on the body will be attracted to the side, through the directional hydraulic valve to open or close the directional hydraulic control valve to open different oil drain hole.And into the hole is open, the hydraulic oil will enter a different row of tubing, and then through the pressure to promote the piston, the piston and the piston rod, the piston rod drives the mechanical device.Thus through the current control of an electromagnet to control the mechanical movement.

Disadvantages of hydraulic directional control valve

1.Regulation accuracy is limited.

4WEH Rexroth hydraulic solenoid valve is usually only switch two kinds of state, the valve core can only be in the two limit position, can not be adjusted continuously. A lot of new ideas to break through, but still in the trial stage, so the adjustment accuracy is also subject to certain restrictions.

2.Flow medium

The 4WEH Rexroth hydraulic solenoid valve on the media have high requirements for cleanliness, including granular media can not be applied, if must first filter out impurities.In addition, the viscous medium can not be applied, and the specific product is suitable for the medium viscosity range is relatively narrow. But some of these shortcomings can be avoided by selecting.

Directional control valve selection

According to the requirements of the system to select the type of rexroth 4we6 hydraulic solenoid valve.For example,it should select one-way valve while the demand for oil flow can only flow in one direction, and can not reverse flow; if the required execution element is completed in a stop working cycle, the three bit reversing valve should be selected; if only needs two kinds of working state, namely the feed and return, then should use two position reversing valve, turn on or off the oil;If the actuator to complete the ‘fast forward, forward, rewind, stop’ the work cycle, or reciprocating frequent movement should normally be select the reversal valve to transform the oil flow direction.
You can also select rexroth 4we6 hydraulic solenoid valve according to the working status of the system and the characteristics of the valve. For example, the quality of the moving parts is small, the accuracy requirements are not high, the flow is less than 63 L / min, should choose the rexroth 4we6 hydraulic solenoid valve, because of the impact of this rexroth 4we6 hydraulic solenoid valve is large, so only the small flow allowed; If the moving parts quality, speed range is larger, and require to reverse smoothly, flow work energetically 63 L / rain, should use the electro-hydraulic valve; if the system has a lock loop, should choose the hydraulic control one-way valve with good sealing performance, but not the choice of sealing of the reversing valve.

Working principle of hydraulic solenoid valve

Bosch Rexroth 4WE10 hydraulic solenoid valve is a kind of automatic basic components which used to control the flow, belonging to the actuator.Directional hydraulic control valve used to control the direction of hydraulic flow, the plant’s mechanical devices are generally controlled by hydraulic cylinder, so it will be used in directional hydraulic control valve.
The Bosch Rexroth 4WE10 hydraulic solenoid valve has a closed cavity, in which the different position of the hole, each hole connecting different tubing.The middle of the cavity is the piston, the two sides are two magnets, which the magnet coil on the body will be attracted to the side, through the directional hydraulic valve to open or close the directional hydraulic control valve to open different oil drain hole.And into the hole is open, the hydraulic oil will enter a different row of tubing, and then through the pressure to promote the piston, the piston and the piston rod, the piston rod drives the mechanical device.Thus through the current control of an electromagnet to control the mechanical movement.