Introduction of working principle of unloading valve

Release time:

2021/05/21 15:13

The working device control system is supplied by two oil pumps. The main pump is the P7600-F100 pump, which is used to control the movement of the boom and the bucket cylinder. The pilot pump is P124-G16, which is used to control the proportional pilot valve and then control the main reversing valve. The displacement of the core achieves the working speed of the boom and bucket cylinder. The oil of the pilot pump first enters the brake valve. In addition to ensuring the brake oil, it provides a control oil source to the pilot system. This oil enters the control oil circuit after being reduced to the control pressure required by the pilot control system through the pressure reducing valve., Control the action of the working device.

Could you tell me what are the types of unloading valve?

Release time:

2021/05/21 15:12

The unloading channel and pressure valve are set up separately. During unloading, each spool is in the neutral position, and the oil from the oil source is discharged back to the oil tank through a special oil passage that runs through each valve, and the unloading oil passage runs through each reversing valve. When any one of the valves is working (I. e., cut off the unloading oil passage). The oil from the oil source enters the controlled actuator from the reversing valve, and the working pressure is limited by the pressure valve in the figure.

Main use and selection principle of unloading relief valve

Release time:

2021/05/21 15:10

The main function of the unloading relief valve is to automatically control the unloading or loading of the pump. In view of the function of the unloading relief valve, there is a certain difference between the unloading pressure and the loading pressure. If the difference is too small, the unloading and loading actions of the pump are too frequent; if the difference is too large, the system pressure changes too much. The difference between loading pressure and unloading pressure is an important performance index of unloading relief valve. Generally, the loading pressure is about 85% of the unloading pressure. Its performance is the same as the relief valve.

Unloading valve A valve that unloads the hydraulic pump

Release time:

2021/05/21 15:09

Unloading valve is under certain conditions, can make the hydraulic pump unloading valve. The unloading valve is usually an overflow valve with a two-position two-way valve (usually a solenoid valve). The function is to set the main pressure of the system (oil pump) when it is not unloading. When the unloading state (by the two-position two-way valve action conversion), the pressure oil directly returns to the oil tank, and the oil pump pressure drops to approximately zero, so as to realize some loop control, improve the service life of the oil pump and reduce power consumption. In a circuit that belongs to a merged circuit. The pressure reducing valve is used to adjust the pressure required for the implementation of components, is in series in the circuit, generally can not be used interchangeably.

What details should be paid attention to when installing the regulating valve?

Release time:

2021/05/21 15:07

Everyone in the process of installing the regulating valve, there are some details that we need to master, so what do these details mainly include? Wuhan Xiete Valve Technology Co., Ltd. will take you to understand in detail.

What is the common basis for valves in the selection process?

Release time:

2021/05/21 15:05

What is the common basis for valves in the process of selection? Wuhan Xiete Valve Technology Co., Ltd. will take you to understand in detail about this issue. The use of the selected valve, operating conditions and operating control methods.
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