china high pressure hydraulic manifold blocks suppliers,china hudraulic manifold block suppliers

china high pressure hydraulic manifold blocks suppliers,china hudraulic manifold block suppliers

Hydraulic system running slow, underspeed reasons, troubleshooting methods and maintenance suggestions

Added time: 2020-11-16

The hydraulic system runs slowly, which is often called underspeed. The underspeed is not not working, but failing to meet the requirements of the system, so it is difficult to check, and there are many kinds of situations. The following two conditions and specific reasons for the hydraulic system underspeed are summarized for your reference. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

How to do if the hydraulic system runs slowly or underspeed? Causes, elimination methods and maintenance suggestions

 

1. Failure maintenance of hydraulic system – the adverse effects of insufficient speed of hydraulic pump

 

 

 

The underspeed of the hydraulic pump actuator (hydraulic cylinder and hydraulic motor) includes two conditions:

 

 

 

One is the fast movement (fast forward) speed is not fast enough, can not reach the design value and the new hydraulic pump specified value;

 

 

 

Second, under load, its working speed (working) decreases significantly with the increase of the load, especially for large hydraulic hydraulic pumps and large load hydraulic pumps, this phenomenon is particularly significant, and the speed is generally related to the size of the flow. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

Underspeed first affects the production efficiency, increases the hydraulic pump cycle time; Underspeed phenomenon often stops movement under large load, which will affect the normal work of the hydraulic pump. For hydraulic pumps that need fast movement, such as surface grinders, insufficient speed will affect the roughness of the grinding surface. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

 

 

2, the hydraulic system underspeed fault causes

 

 

 

1) Not fast enough

 

 

 

This is a common failure in hydraulic pump maintenance. The following conditions can cause the failure.

 

 

 

The output flow of the hydraulic pump is not enough and the output pressure is not up to. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

(2) The relief valve because the spring is permanently deformed or misinstalled into a weak spring, the main valve core damping hole is locally blocked, the main valve core is jammed in the small opening position, resulting in the hydraulic pump output pressure oil part overflow back to the tank, the effective flow into the system to the executive element is greatly reduced, so that the speed of fast movement is not enough. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

(3) The internal and external leakage of the system is serious: the general working pressure is low when fast forward, but the pressure is much higher than that of the oil return road. When the piston seal of the hydraulic cylinder is damaged, the two chambers of the hydraulic cylinder are leaking large (there is a pressure difference) because of channelled chamber, so that the fast speed of the hydraulic cylinder is not enough, and the other parts of the internal and external leakage. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

(4) high resistance when fast forward, such as guide rail lubrication oil, guide rail of the panel is too tight, hydraulic cylinder installation accuracy and assembly accuracy is poor, resulting in the increase of friction resistance when fast forward. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

2, the hydraulic system work speed decreased significantly

 

 

 

Work feed, work speed significantly reduced under load, even if the speed control valve (throttle valve, etc.) is still so, need from the following aspects of analysis and maintenance. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

(1) The system is under load, the working pressure increases, the leakage increases, and the adjusted speed decreases due to the increase of internal and external leakage. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

② The system oil temperature increases, the oil viscosity decreases, the leakage increases, and the effective flow decreases.

 

 

 

(3) The design of the hydraulic system is unreasonable. When the load changes, the flow into the actuator of the hydraulic equipment also changes, causing the change of speed. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

(4) There are impurities in the oil, blocking the throttle port of the flow control valve, resulting in the reduction of the working speed; When blocked when through, resulting in speed instability. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

⑤ There is air in the hydraulic system.

 

 

 

3, the elimination of the hydraulic system underspeed

 

 

 

1) Eliminate the failure of insufficient output flow and low output pressure of hydraulic oil pump.

 

 

 

2) Eliminate the failure caused by pressure valves such as relief valves to keep the pressure down.

 

 

 

3) Find out the location of internal leakage and external leakage, eliminate internal and external leakage, replace the badly worn parts to eliminate internal leakage. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

4) Control oil temperature.

 

 

 

5) Cleaning parts such as flow valve, oil pollution is serious, timely oil change.

 

 

 

6) Find out the cause of hydraulic system intake and eliminate the air in the hydraulic system. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

4. Hydraulic system maintenance suggestions

 

 

 

1) Keep the normal oil level high. An oil level gauge should be set in the tank for frequent observation and filling of oil.

 

 

 

2) The oil performance should be checked regularly, and the oil tank should be replaced and cleaned in time if it fails to meet the specified requirements.

 

 

 

3) The oil filter should be cleaned frequently to ensure smooth oil inhalation. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

4) After the oil pump has been working for a period of time, the mounting screw or the oil inlet valve screw may be loose (due to vibration), so pay attention to check and tighten the anti-loosening. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

5) The maximum hydraulic impact force of the system shall not exceed 14Mpa.

 

 

 

6) In order to do a good job in the maintenance of the system, it is necessary to know the relationship between the operating temperature of the oil in the tank (open loop) and the temperature of the environment. The maximum temperature in any part of the system must not exceed 90 degrees. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

 

 

 

The above is some knowledge of the failure maintenance of the hydraulic system, Shanxi Yucifeng special line hydraulic machinery Co., Ltd. specializing in the production of hydraulic products, welcome to discuss at any time. China High pressure hydraulic manifold blocks suppliers, China Hudraulic manifold block suppliers

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