Hydraulic stationIt is one of the core components of many mechanical equipment, mainly responsible for providing hydraulic power.hydraulic systemReturn oil "refers to the hydraulic oil flowing back from the actuator or system to the oil tank.Hydraulic stationNot returning oil will cause the system to malfunction, seriously affecting the performance and lifespan of the equipment.This article will provide a detailed introduction to the common reasons for hydraulic stations not returning oil and corresponding solutions.

Reasons and solutions for hydraulic station not returning oil in hydraulic press

1、 Excessive pressure

　　液压机不会回油的常见原因是因为油液背压过大，导致回油回路阻塞。在液压系统中，回油管道是直接与液压油箱相连的，当回油管道受到背压时，油会在回油溢流阀的反作用力下倒流回油泵，导致液压机不会回油。解决方法是要检查回油管道，并去除其中的障碍，降低液压系统中的工作压力。

2、 Seal damaged

In hydraulic systems, seals ensure the sealing of the oil circuit. When seals age or wear out, oil will leak out from the seals, causing the hydraulic press to not return oil. The solution is to replace the damaged seal.

3、 Oil circuit blockage

In hydraulic systems, oil blockage is one of the common reasons why hydraulic presses do not return oil. It may be due to foreign objects or deposits inside the oil circuit components, or excessive contamination of the oil, resulting in blockage of the oil circuit. The solution is to remove obstacles by cleaning the oil circuit or replacing the oil.

4、 Other factors

The reason why hydraulic presses do not return oil may also be due to other factors, such as the steering of the oil pump, internal damage to the oil pump, or stuck actuator components. The solution is to inspect the hydraulic system and carry out corresponding maintenance and replacement according to the specific situation.

Overall,There are various reasons and solutions for hydraulic presses not returning oil.Only by identifying the specific problem and taking corresponding measures can the problem of hydraulic press not returning oil be successfully solved.

Reasons and solutions for the hydraulic station of the bending machine not returning oil

1、 Internal malfunction of hydraulic pump

Internal faults in hydraulic pumps are one of the common reasons why hydraulic pumps in bending machines do not return oil. When some parts inside the hydraulic pump wear, deform or get stuck, the hydraulic pump cannot smoothly pump the oil back to the tank, resulting in the hydraulic pump not returning oil. The solution to this problem is to check whether there is any malfunction inside the hydraulic pump, and if so, replace the damaged parts in a timely manner.

2、 Oil circuit blockage

Another reason why the hydraulic pump of the bending machine does not return oil is that the oil circuit is blocked. Blockage in the oil circuit may be due to impurities, dust, and other pollutants settling inside the oil pipeline, causing the hydraulic pump to be unable to return oil smoothly. The solution to this problem is to check whether the oil circuit is blocked and clean the oil circuit dirt to ensure that the oil circuit is unobstructed.

3、 Insufficient hydraulic system pressure

Insufficient hydraulic system pressure is also one of the reasons why the hydraulic pump of the bending machine does not return oil. If the hydraulic system pressure is too low, the hydraulic pump will not be able to successfully return the oil to the tank. The solution to this problem is to check and adjust the pressure of the hydraulic system to ensure the appropriate hydraulic system pressure.

4、 Other reasons

In addition to the common reasons mentioned above, there may be other issues with the hydraulic pump of the bending machine not returning oil, such as insufficient oil level in the tank or incorrect pump assembly. The solution to these problems requires experienced maintenance personnel to conduct inspections and repairs.

In short, when the hydraulic pump of the bending machine does not return oil, it is necessary to carefully investigate the cause of the problem and adopt appropriate solutions. Timely resolution of problems can ensure the normal operation of the hydraulic system and improve the efficiency of the bending machine.

The hydraulic station has pressure, but the oil cylinder does not move

The reasons why the hydraulic station has pressure but the oil cylinder does not move may include:

1、 Insufficient pressure

It may be due to the oil not entering the hydraulic cylinder, or there being oil but insufficient pressure. This may be due to reasons such as the reversing valve not reversing, the system not supplying oil, hydraulic system malfunctions (such as pump or relief valve failures), severe internal leaks, loose pistons and piston rods, and severe damage to seals.

2、 The pressure has reached the required level but still does not act

It may be due to structural issues with the hydraulic cylinder, such as the piston end face being tightly attached to the cylinder end face, insufficient working area, or hydraulic circuit problems, such as the oil in the back pressure chamber of the hydraulic cylinder not being connected to the oil tank, the throttle of the speed control valve on the return oil circuit being adjusted too small, or the directional valve connecting the return oil not being activated.

3、 Poor installation connection

The resistance of the moving parts of the hydraulic cylinder is too high, or improper installation can cause external forces to interfere with the direction of movement. This requires reinstalling the oil cylinder correctly to ensure that its direction of movement is not disturbed by other external forces. The methods to solve these problems include checking and eliminating the cause of the reversing valve not reversing, checking the cause of hydraulic pump and main hydraulic valve faults, tightening the piston and piston rod and replacing the seals, readjusting the pressure until it reaches the required value, checking and eliminating the connection problem between the hydraulic cylinder and the load, cleaning the oil circuit to ensure smoothness, and reinstalling the hydraulic cylinder correctly.

In addition, if there is residual air in the hydraulic cylinder, exhaust treatment is required; If there is a lack of hydraulic oil in the hydraulic cylinder, it should be added in a timely manner; If there is a blockage in the oil pipe or circuit, it should be cleaned in a timely manner.

Summarize

The problem of hydraulic station not returning oil is a common and significant issue. Through regular maintenance, reasonable design, and timely troubleshooting, the problem of hydraulic station not returning oil can be effectively solved, ensuring the normal operation of the hydraulic system. I hope the introduction in this article can provide some reference and help for everyone in practical work.