Abstract
Dump Truck by hydraulic or mechanical lifting and unloading of goods vehicles on their own, also known as dump trucks.
The principle of hydraulic dump bodies through the engine will be driven high-pressure gear pump hydraulic oil into the hydraulic cylinder by the circuit through the telescopic hydraulic cylinder, the realization of the dump truck features.
The dump truck bodies truck greatly shortened the time of discharge. Gear pump widely used in all kinds of hydraulic machinery, its main advantages are: simple and compact structure, small size, light weight, performance and self-absorption, is not sensitive to dirt, reliable, long life, ease of maintenance repairs, the cost of low, due to the rotation of gear body is symmetrical, it allows high-speed rotation, the maximum working pressure up to 315bar. Its shortcomings are as follows: flow and pressure pulsation, and noise large (Internal Gear Pumps are a great improvement), emissions can not be changed.
The design of the projects undertaken by the gear pump housing CBGH series high-strength aluminum alloy material, the use of the internal structure of floating axial compensation gap, radial balance, DU a number of self-lubricating and other advanced technologies. It has a volume of high efficiency, high pressure, low noise, seismic performance, long life and other characteristics, widely used in truck, loaded trucks, excavators, cranes, road rollers, such as construction machinery and mining, light industry, sanitation, agricultural and other industries. The gear pump has a volumetric efficiency of its high pressure, low noise, seismic and strong, long life, large capacity, etc., in order to achieve all kinds of hydraulic dump truck bodies normal operation.
When the gear pump in the use of the main problems are as follows: 1.the phenomenon of trapped oil 2. volumetric efficiency 、 mechanical efficiency and overall efficiency of 3.noise 4.leakage phenomenon.
Keywords：gear pump Displacement Noise Trapped oil Volumetric efficiency
