In the high pressure and large flow management system of the four-column hydraulic press, due to the large steady-state fluid force acting on the control valve core, the electromagnetic force of the electromagnetic proportional directional valve is routinely used
The general scale is small, cannot guarantee its reliable commutation. After A, through the one-way valve, the hydraulic oil is circulated in the tank to make the cylinder/piston cycle work to complete A certain mechanical action as A machine of productivity. Hydraulic press a use of liquid static pressure to liquid as the working medium, according to the PASCAL principle for the transfer of energy to process metal, plastic, rubber, wood, powder and other products of the machine. It is generally composed of the machine (main engine), power system and hydraulic control system. Hydraulic machine classification valve hydraulic machine, liquid hydraulic machine, engineering hydraulic machine. Through a special hydraulic oil as working medium, through the hydraulic pump as power source, by the force of the pump hydraulic oil through hydraulic line into the cylinder/piston, then some groups to cooperate with each other in the oil cylinder/piston seals, different location of the seal is different, but all have the effect of sealing, which the hydraulic oil cannot be leaked. In this hydraulic system, an electro-hydraulic directional valve should be used to change direction. Electrohydraulic.
The reversing valve belongs to the secondary structure, in which the electromagnetic reversing valve plays the role of the pilot stage, that is, to change the hydraulic oil controlled by the hydraulic reversing valve.
Direction. Because the flow of control hydraulic oil is very small, the specification of solenoid directional valve can be made smaller (usually 6 diameter varieties),
Hydraulic directional valve is the main valve, and its working position is determined by the working position of the electromagnetic directional valve. Currently, there are 32 sizes in China.
Electro-hydraulic directional valve, the maximum management operating environment pressure is 35. OMPa, the maximum design flow is llOOL/min.
If the electro-hydraulic directional valve is improperly selected, irreversible failure will result.
A certain unit reformed the hydraulic system of the press by itself.
Rexroth 4WEH16C50/6AG24NERR24 / dL, flow rate 31.5mpa /min
Four - column hydraulic electro - hydraulic directional valve for oil circuit control. The valve is of internal control and internal discharge type. In this configuration, controlled cutting oil is introduced from the P-chamber of main valve 3, and
Drain back to tank through T chamber of main valve. Due to the limitation of the strength of the main valve cover and screw, the maximum working pressure we can control can not exceed 25. OMPa,
Therefore, a certain proportion of pressure reducing valve 1 is installed between the pilot valve 2 and the main valve, and the pressure reduction ratio is 1; 0. 66. The failure of the electro-hydraulic directional valve system during commissioning indicates that the commutation is not reliable. The electro-hydraulic directional valve in the initial position, such as electromagnet in the state of power or power), after the main motor starts, the system pressure can rise to the rated pressure; When the electro-hydraulic reversing valve is operated when switching (such as the electromagnet from energized working state can be turned into power-off state or the electromagnet from power-off state information into power-off state), the system learning pressure suddenly drops to a low voltage (about 0.3mpa), after stopping the motor again, the system pressure can rise to the rated pressure;
When the electro-hydraulic reversing valve is switched, the system pressure suddenly drops to low pressure. After checking each of the relevant components in the system,
It is found that the failure of electro-hydraulic commutation is caused by the unreliability of electro-hydraulic commutation, and the reasons may be as follows: 1. The electromagnet is out of order. Return spring for guide valve or main valve. The spring is not strong enough; ③ pilot spool stuck; ④ The main spool is stuck.
Ruian Tianrui Hydraulic Machinery Co., Ltd. specializes in the production of four column hydraulic press, more related products please pay attention to the official website www.zjtianruiyeya.com
The general scale is small, cannot guarantee its reliable commutation. After A, through the one-way valve, the hydraulic oil is circulated in the tank to make the cylinder/piston cycle work to complete A certain mechanical action as A machine of productivity. Hydraulic press a use of liquid static pressure to liquid as the working medium, according to the PASCAL principle for the transfer of energy to process metal, plastic, rubber, wood, powder and other products of the machine. It is generally composed of the machine (main engine), power system and hydraulic control system. Hydraulic machine classification valve hydraulic machine, liquid hydraulic machine, engineering hydraulic machine. Through a special hydraulic oil as working medium, through the hydraulic pump as power source, by the force of the pump hydraulic oil through hydraulic line into the cylinder/piston, then some groups to cooperate with each other in the oil cylinder/piston seals, different location of the seal is different, but all have the effect of sealing, which the hydraulic oil cannot be leaked. In this hydraulic system, an electro-hydraulic directional valve should be used to change direction. Electrohydraulic.
The reversing valve belongs to the secondary structure, in which the electromagnetic reversing valve plays the role of the pilot stage, that is, to change the hydraulic oil controlled by the hydraulic reversing valve.
Direction. Because the flow of control hydraulic oil is very small, the specification of solenoid directional valve can be made smaller (usually 6 diameter varieties),
Hydraulic directional valve is the main valve, and its working position is determined by the working position of the electromagnetic directional valve. Currently, there are 32 sizes in China.
Electro-hydraulic directional valve, the maximum management operating environment pressure is 35. OMPa, the maximum design flow is llOOL/min.
If the electro-hydraulic directional valve is improperly selected, irreversible failure will result.
A certain unit reformed the hydraulic system of the press by itself.
Rexroth 4WEH16C50/6AG24NERR24 / dL, flow rate 31.5mpa /min
Four - column hydraulic electro - hydraulic directional valve for oil circuit control. The valve is of internal control and internal discharge type. In this configuration, controlled cutting oil is introduced from the P-chamber of main valve 3, and
Drain back to tank through T chamber of main valve. Due to the limitation of the strength of the main valve cover and screw, the maximum working pressure we can control can not exceed 25. OMPa,
Therefore, a certain proportion of pressure reducing valve 1 is installed between the pilot valve 2 and the main valve, and the pressure reduction ratio is 1; 0. 66. The failure of the electro-hydraulic directional valve system during commissioning indicates that the commutation is not reliable. The electro-hydraulic directional valve in the initial position, such as electromagnet in the state of power or power), after the main motor starts, the system pressure can rise to the rated pressure; When the electro-hydraulic reversing valve is operated when switching (such as the electromagnet from energized working state can be turned into power-off state or the electromagnet from power-off state information into power-off state), the system learning pressure suddenly drops to a low voltage (about 0.3mpa), after stopping the motor again, the system pressure can rise to the rated pressure;
When the electro-hydraulic reversing valve is switched, the system pressure suddenly drops to low pressure. After checking each of the relevant components in the system,
It is found that the failure of electro-hydraulic commutation is caused by the unreliability of electro-hydraulic commutation, and the reasons may be as follows: 1. The electromagnet is out of order. Return spring for guide valve or main valve. The spring is not strong enough; ③ pilot spool stuck; ④ The main spool is stuck.
Ruian Tianrui Hydraulic Machinery Co., Ltd. specializes in the production of four column hydraulic press, more related products please pay attention to the official website www.zjtianruiyeya.com