KP1/8G10AK0A4NL2 fuel separator supply pump KRACHT

When the radial unbalance force is large, it can cause the shaft to bend, the tooth tip to come into contact with the housing, and accelerate the wear of the bearing, reducing its lifespan.

Elimination methods

KP1/8G10AK0A4NL2 fuel separator supply pump KRACHTThe method to eliminate trapped oil is usually to open unloading slots on both sides of the cover plate, so that when the volume of the closed chamber decreases, it is connected to the oil pressure chamber through the unloading slot on the left, and when the volume increases, it is connected to the oil suction chamber through the unloading slot on the right.

performance improvement

KP1/8G10AK0A4NL2 fuel separator supply pump KRACHTFeasible circuit for improving the performance of gear oil pump

Due to the structural limitations of fixed displacement, gear pumps are generally considered to be only suitable for use as constant flow hydraulic sources.

Installing a control valve directly on the pump can eliminate the pipeline between the pump and the directional valve, thereby controlling costs. Fewer pipe fittings and connectors can reduce leakage and improve work reliability. Moreover, installing valves on the pump itself can reduce the circulating pressure of the circuit and improve its working performance. Here are some circuits that can improve the basic functions of gear pumps, some of which have been proven feasible in practice, while others are innovative research.

Unloading circuit

The unloading components will be combined with high flow pumps and low-power single pumps. Due to the structural limitations of fixed displacement, it is generally believed that gear pumps can only be used as constant flow hydraulic sources for liquid from two gear oil pumps Due to the structural limitations of fixed displacement, gear oil pumps are generally considered to be only suitable for use as constant flow hydraulic sources. However, the combination valve scheme of accessories and threaded connections is effective in improving its functionality, reducing system costs, and enhancing system reliability. Therefore, the performance of gear oil pumps can approach that of expensive and complex plunger pumps. At this point, the high flow pump circulates the flow from its outlet to its inlet, thereby reducing the pump's output flow to the system, that is, reducing the pump's power to slightly higher than the required value for high-pressure operation. The percentage of flow reduction depends on the ratio of unloaded displacement to total displacement at this time. The combination or threaded connection of unloading valves reduces or even eliminates possible leaks in pipelines, ducts, accessories, and other components.

Simple unloading of components is manually operated. The spring opens or closes the unloading valve, and when a control signal is given to the valve, the on/off state of the valve is easily switched. Leverage or other mechanical mechanisms are a simple way to operate this type of valve.

The pilot (pneumatic or hydraulic) unloading valve is an improvement on the control method, as this type of valve can be remotely controlled. The major advancement is the use of electromagnetic valves controlled by electrical or electronic switches, which can not only be remotely controlled but also automatically controlled by microcomputers. This simple unloading technology is generally considered to be the best application scenario.

Manual operation of unloading components is commonly used in circuits that require high flow rates for rapid action, high flow rates for rapid action, and reduced flow rates for precise control, such as the boom circuit for rapid expansion and contraction. When the unloading valve of the circuit has no control signal, the circuit keeps outputting a large flow rate. For normally open valves, the circuit will output a small flow rate under normal conditions.

Pressure sensing unloading valve is a common solution. The spring action keeps the unloading valve in its high flow position. When the circuit pressure reaches the preset value of the relief valve, the relief valve opens and the unloading valve switches to its low flow position under the action of hydraulic pressure. The pressure sensing unloading circuit is commonly used for hydraulic cylinders that require fast travel and high pressure and low speed supply at the end of the travel. The pressure sensing unloading valve base is basically an automatic unloading component that unloads when the system pressure is reached, commonly used in range measuring instruments, splitters, and hydraulic vises.