When the four-column hydraulic press valve core reaches the middle position, because of the negative covering degree, that is, the shoulder width of the valve core is less than the sink width of the valve body, at this time, the high-pressure oil and the cylinder two cells meet, the cylinder will stop moving. Because the right chamber of the cylinder is always connected with the high pressure oil in the braking process of the four-column hydraulic press, there will be no vacuum phenomenon in the cylinder due to inertia, which is beneficial to prevent the crawling phenomenon caused by gas mixed with the oil.
When the valve spool of the four-column hydraulic press reversing valve continues to move to the left, the oil discharged from the valve spool mainly flows back to the tank from the throttle valve, until the oil circuit is blocked, the main valve spool will reverse the main oil circuit, and the workbench begins to move in reverse. This section of the valve table in the state of stay, stay valve length can be adjusted throttle.
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
When the valve spool of the four-column hydraulic press reversing valve continues to move to the left, the oil discharged from the valve spool mainly flows back to the tank from the throttle valve, until the oil circuit is blocked, the main valve spool will reverse the main oil circuit, and the workbench begins to move in reverse. This section of the valve table in the state of stay, stay valve length can be adjusted throttle.
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