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3 Common Problems and Elimination Methods of Hydraulic Equipment

2018-04-27

March 22, 2017 17:40 Source: China Net
With the progress of science and technology, hydraulic equipment has been greatly optimized to meet the needs of social economy. Its application has been widely used in various industries. There are many types of hydraulic equipment, but they also have common characteristics.
 
Common problems caused by oil discharge or pressure of hydraulic components
1. The hydraulic component does not discharge oil or has no pressure. The cause may be poor contact between the oil distribution pan of the vane pump and the pump body or the vane is stuck in the chute. The corresponding measures are to repair the contact surface in time, readjust or clean the chute and blade, and reinstall it.
2. The steering of the prime mover and the hydraulic pump is not synchronized during operation, and the oil level of the oil tank is too low. The oil suction pipe or the oil filter is blocked. For the corresponding solution to this problem, correct and debug the steering in time, add oil to the oil marking line, and clean the oil suction pipe Or the oil filter to make it unblocked.
3. The speed is too low when starting, and the oil inlet leaks. The solution is to make the speed reach the minimum speed of the hydraulic pump above the replacement of seals or joints.
 
Noise problem
The oil suction pipe or oil filter is partially blocked and the connection at the oil suction end is not tightly sealed, which will produce noise, which is relatively easy to solve, which can remove dirt and make the oil suction pipe unblocked.
The connection of the oil suction end is not tightly sealed, air enters, and the oil suction position is too high, which is also a cause of noise. Generally, oil can be applied to the connection of the oil suction end. If it improves, tighten the connector or replace the seal to reduce The oil absorption height reduces noise.
The gear pump tooth profile accuracy is not high or poor contact, the parts in the pump are damaged, the axial clearance of the gear pump is too small, the verticality between the inner hole of the gear and the end face or the parallelism of the two holes on the pump cover will also produce noise, and the gear can be replaced or ground., Replace damaged parts, check and repair related parts.
There are many factors that cause noise, such as overflow valve damping hole blocking pipeline vibration, etc., we can remove the overflow valve cleaning to take isolation and vibration elimination measures to reduce noise.
 
The speed of fast movement is not enough
Underspeed of hydraulic equipment actuators (hydraulic cylinders and hydraulic motors) includes two situations:
First, the speed of rapid movement (fast forward) is not fast enough to reach the design value and the specified value of the new equipment;
Second, under load, its working speed (work progress) decreases significantly with the increase of load, especially for large hydraulic equipment and equipment with large load. This phenomenon is particularly significant, and the speed is generally related to the flow rate. Under-speed first affects production efficiency and prolongs the working cycle time of hydraulic equipment. Under-speed phenomenon often stops moving under heavy load, which will affect whether the equipment can work normally. For equipment that requires rapid movement, such as surface grinders, insufficient speed will affect the roughness of the grinding surface.
The reason is that the internal and external leakage of the system is serious: the general working pressure is low when fast-moving, but it is much higher than the pressure of the oil return circuit. When the piston seal of the hydraulic cylinder is damaged, the two chambers of the hydraulic cylinder have a large internal leakage due to the series chamber (there is a pressure difference), so that the rapid movement speed of the hydraulic cylinder is not enough, and the internal and external leakage of other parts will also produce this phenomenon.
Under-speed troubleshooting method to eliminate the hydraulic pump output flow is not enough and the output pressure is not high fault.
Eliminate pressure valves such as relief valves that cause pressure to go up. Find out the location of internal leakage and external leakage, eliminate internal and external leakage; replace severely worn parts, eliminate internal leakage. Control the oil temperature. Clean parts such as flow valve, oil pollution is serious, timely change the oil. Find out the cause of air intake in the hydraulic system and remove the air in the hydraulic system.
 
The above is the relevant information that Xiaobian learned on the China Hydraulic Industry Network (http://yyzb.99114.com). It is reported that in addition, the China Hydraulic Industry Network is also suitable for purchasing. The platform gathers many high-quality merchants and is the best choice for buyers. Of course, there are also professional market trends. If you want to know more, come to the China Hydraulic Industry Internet Cafe!