AAK Hydraulic Directional Control Cartridge Valve can reverse at high frequency, which has one more function than the standard parts of HydraForce

China [CN]

Laertes, from Greece, has been cooperating with AAK for 3 years, mainly purchasing standard parts of cartridge valves of HydraForce. Last year, he needed to purchase a hydraulic directional control cartridge valve benchmarking HydraForce to develop their pile driver, but AAK did not have the procedure for this cartridge valve, and then no further news from him. I thought he directly purchased from HydraForce. It was not until last December that Laertes asked me the fastest time to customize the hydraulic directional control cartridge valve, then I knew that he had purchased the hydraulic directional control cartridge valve from a cartridge valve manufacturer in Ningbo. During the equipment commissioning, the pile driver started slowly and had general stability. Their sales did not think that it was up to par. The engineer analyzed and suggested that the external control system should be connected or the high-frequency reversing function of the hydraulic directional control cartridge valve should be added. The boss asked to improve the hydraulic directional control cartridge valve, but the original hydraulic directional control cartridge valve manufacturer said that this is a standard part of HydraForce and cannot be improved. Laertes had to contact AAK cartridge valve again. 

According to his hydraulic schematic diagram, production drawings of hydraulic directional control cartridge valve and equipment working video, AAK engineers said that adding the high-frequency reversing function to the hydraulic directional control cartridge valve can indeed avoid the slow vibration of the equipment and improve the stability. The directional control of AAK is to control the valve spool through oil circuit switching, and realize the commutation frequency adjustment of the hydraulic directional control cartridge valve. Laertes paid the development fee on the second day. After 35 days, AAK sent 12 samples of hydraulic directional control cartridge valves.

Yesterday, Laertes informed by email that after replacing with AAK hydraulic directional control cartridge valve, the pile driver was debugged smoothly, and the vibration of the pile driver was fast, the power density was high, the stability was good, and the high frequency and large flow could be met. The AAK optimized hydraulic directional control cartridge valve has one more function than the standard part of HydraForce.

1. The AAK hydraulic directional control cartridge valve body has multiple valve holes and multiple main oil passage ports, and the valve holes are interconnected.

2. Two throttle valve spools are installed on the control flow channel between the oil chambers on both sides of the main oil circuit switching valve spool and the control oil circuit switching valve spool. The flow area of the two throttle valve spools can be adjusted. The pressure reducing valve spool is installed on the control flow passage between the main oil passage port and the control oil passage switching valve spool.

3. There is a control oil passage port on the valve body for connecting the external control oil passage. The oil pressure area of the control oil chamber at both ends of the control oil switching valve spool and the main oil circuit switching valve spool is different. Under normal pressure, the oil pressure acting area of the oil chamber is smaller than that of the variable pressure oil chamber, which can realize the differential connection of the control oil circuit.

By controlling the movement of the oil switching valve spool and the main oil circuit switching valve spool, the main oil circuit switching is realized. By adjusting the flow area of the two throttling valve spools, the oil resistance of the control oil chamber is changed, the movement speed of the main oil circuit switching valve spool is changed, and the reversing time is adjusted to realize the reversing frequency adjustment of the hydraulic directional control cartridge valve.

AAK, a cartridge valve manufacturer in China, its hydraulic directional control cartridge valve has one more function than the standard parts of HydraForce. You can also try it!

https://www.aakindustry.com/info-detail/directional-control-cartridge-valves-aak510