What is the internal control, external control, internal leakage and leakage of the electro-hydraulic reversing valve used under what occasion? Dalan Hydraulics tells you that the different control methods and draining modes can be switched by the setting of the plug on the valve.
What is the internal control, external control, internal leakage and leakage of the electro-hydraulic reversing valve used under what occasion? Dalan Hydraulics tells you that the different control methods and draining modes can be switched by the setting of the plug on the valve.
The electro-hydraulic reversing valve control oil x can take the P port of the independent oil circuit (internal control), or an independent oil source (external control).
For the high pressure hydraulic system (high P pressure), in order to prevent the reversing impact, the control oil x cannot take the autonomous P port, and an independent oil source with a lower pressure is required, that is, an external control type is adopted.
When using external control, the flow rate of the independent oil source shall not be less than 15% of the maximum flow rate of the main valve to ensure the commutation time requirement.
For the low pressure hydraulic system (low P pressure), the control oil x can take the P port of the independent oil circuit, that is, the internal control type.
When using internal control, the main oil circuit must guarantee the minimum control pressure (0.3 ~ 0.5MPa).
The oil return y of the solenoid valve can be taken out separately (external leakage), or it can be communicated with the main valve return port T in the valve body and discharged back to the fuel tank (internal leakage).
For the system with high pressure at the main valve return port T, in order to prevent the T back pressure from being too high, the pilot valve return oil y is too high, causing the main valve commutation resistance to be too large, and the return oil y should be separated from the T, separately returning to the fuel tank. That is, the use of the external type.
For systems with low pressure at the return port T, the return oil y can communicate with T, using internal leakage.
The figure below shows the external control external leakage type electro-hydraulic reversing valve oil circuit. This type of valve is used in the high pressure system and the main return oil pressure (back pressure) is high.
The figure below shows the internal control internal discharge type electro-hydraulic reversing valve oil circuit. This type of valve is used in the low pressure system and the main return line pressure (back pressure) is low.
The figure below shows the internal control leakage type electro-hydraulic reversing valve oil circuit, which is suitable for low pressure system and high main return oil pressure (back pressure).
The figure below shows the external control internal discharge type electro-hydraulic reversing valve oil circuit, which is suitable for high pressure system and high main return oil pressure (back pressure).
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
Copyright http: / (Dalan Motor) Reprint, please indicate the source
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
What is the internal control, external control, internal leakage and leakage of the electro-hydraulic reversing valve used under what occasion? Dalan Hydraulics tells you that the different control methods and draining modes can be switched by the setting of the plug on the valve.
The electro-hydraulic reversing valve control oil x can take the P port of the independent oil circuit (internal control), or an independent oil source (external control).
For the high pressure hydraulic system (high P pressure), in order to prevent the reversing impact, the control oil x cannot take the autonomous P port, and an independent oil source with a lower pressure is required, that is, an external control type is adopted.
When using external control, the flow rate of the independent oil source shall not be less than 15% of the maximum flow rate of the main valve to ensure the commutation time requirement.
For the low pressure hydraulic system (low P pressure), the control oil x can take the P port of the independent oil circuit, that is, the internal control type.
When using internal control, the main oil circuit must guarantee the minimum control pressure (0.3 ~ 0.5MPa).
The oil return y of the solenoid valve can be taken out separately (external leakage), or it can be communicated with the main valve return port T in the valve body and discharged back to the fuel tank (internal leakage).
For the system with high pressure at the main valve return port T, in order to prevent the T back pressure from being too high, the pilot valve return oil y is too high, causing the main valve commutation resistance to be too large, and the return oil y should be separated from the T, separately returning to the fuel tank. That is, the use of the external type.
For systems with low pressure at the return port T, the return oil y can communicate with T, using internal leakage.
The figure below shows the external control external leakage type electro-hydraulic reversing valve oil circuit. This type of valve is used in the high pressure system and the main return oil pressure (back pressure) is high.
The figure below shows the internal control internal discharge type electro-hydraulic reversing valve oil circuit. This type of valve is used in the low pressure system and the main return line pressure (back pressure) is low.
The figure below shows the internal control leakage type electro-hydraulic reversing valve oil circuit, which is suitable for low pressure system and high main return oil pressure (back pressure).
The figure below shows the external control internal discharge type electro-hydraulic reversing valve oil circuit, which is suitable for high pressure system and high main return oil pressure (back pressure).
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
Copyright http: / (Dalan Motor) Reprint, please indicate the source
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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