The research direction of HYDRAULIC GEAR PUMP

HYDRAULIC GEAR PUMP is widely used because of its simple manufacturing process. Although the manufacturing of internal gear pumps is more complicated than that of external gear pumps, it has large displacement and small flow and pressure pulsations under the same size. Generally, the noise of a HYDRAULIC GEAR PUMP is lower than that of external gear. Because of these advantages, the research and development of HYDRAULIC GEAR PUMP have an attractive prospect in the past ten years, and it is widely used in various precision machine tools, injection molding machinery, petrochemical machinery, engineering machinery, agricultural machinery, forging machinery, ship equipment, and other fields, gaining increasingly wide application.

Here is the content list:

• Optimal Design of Parameters

• Low flow pulsation

Optimal Design of Parameters

Since a pair of gears in a HYDRAULIC GEAR PUMP is the heart of the oil pump and is the most critical workpiece, the selection of its parameters is reasonable or not, which will directly affect the performance, noise, and life of the pump. In practical applications, some occasions require high flow uniformity of HYDRAULIC GEAR PUMP; some occasions require the size of the pump to be small or the radial force acting on the gear to be small. Different needs have different mathematical models, but there are also optimizations based on the comprehensive requirements of various aspects. The designers considered the working conditions of the HYDRAULIC GEAR PUMP and the specific requirements of the actual application and constructed three main objective functions: the minimum flow pulsation rate, the minimum volume per unit displacement, and the minimum radial force. When optimizing the design, Different applications require different weighting coefficients for the above three sub-objectives to construct a unified objective function for optimization.

Low flow pulsation

The flow pulsation directly affects the noise of internal gear pumps. The quality of the hydraulic system is directly related to the flow pulsation of the pump. In some hydraulic systems with high requirements, a HYDRAULIC GEAR PUMP is rarely used. At present, the flow pulsation of HYDRAULIC GEAR PUMP is reduced There are many kinds of methods, mainly cascading HYDRAULIC GEAR PUMP. The cascaded HYDRAULIC GEAR PUMP mainly superimposes the simultaneous output flow of the two-stage parallel direct HYDRAULIC GEAR PUMP, so that the total output flow pulsation of the HYDRAULIC GEAR PUMP is reduced. The three-stage parallel HYDRAULIC GEAR PUMP formed by this method is more efficient than the ordinary HYDRAULIC GEAR PUMP of the same specification. The flow pulsation rate is reduced by 25%. Of course, three or more cascades can also be used, which reduces the flow pulsation even more, but the difficulty of manufacturing and assembly it brings will also increase.

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