Publish Time: 2023-11-06 Origin: Site
Among all kinds of hydraulic pumps, the working pressure of a HYDRAULIC GEAR PUMP is only second to that of plunger pumps. In addition, they are small in size and low in price, so they are widely used in mobile equipment and vehicles as a pressure oil source for hydraulic working systems and steering systems. On the other hand, because the HYDRAULIC GEAR PUMP has a large range of speed and displacement, strong oil absorption capacity, and low cost, it is also often used as an auxiliary pump for various hydraulic systems, such as liquid replenishment pumps in closed circuits, pilot control pumps, etc. The low pressure in the system controls the oil source, etc.
Here is the content list:
Stationary hydraulic equipment field
Machine tool hydraulic system and braking system
However, in the field of fixed hydraulic equipment, due to the large flow pulsation, high noise, and limited life of the external HYDRAULIC GEAR PUMP, it has become less and less popular as the main pump, and its use is limited to the auxiliary pump and pre-pressure pump operating at low pressure. On the contrary, the internal HYDRAULIC GEAR PUMP is one of the hydraulic pumps with low noise and good overall performance. Except for the slightly higher price, it is almost better than external gear pumps in other aspects. The development of modern manufacturing technology will greatly narrow the cost gap between internal and external HYDRAULIC GEAR PUMP, and in the industrial field, the increasing popularity of speed-adjustable electric drive technology will largely make up for the shortcomings of internal meshing HYDRAULIC GEAR PUMP itself that cannot be variable.
It can be expected that the application of internal meshing HYDRAULIC GEAR PUMP in fixed and mobile equipment will expand rapidly in the future. In hydraulic engineering, cycloidal external gear pumps are widely integrated into the back cover of the closed oil circuit through-shaft plunger pump with the advantages of small size, low price, and strong self-priming ability, as a low-pressure replenishment pump (provided Control pressure) is used, and sometimes also used as the main pump of some machine tool hydraulic systems. This kind of HYDRAULIC GEAR PUMP can realize a one-way oil supply and has nothing to do with the input steering. This performance has special significance for emergency steering and braking systems that need to be driven by wheels on some vehicles or walking machinery. The cycloidal gear pair (Orbit meshing pair) with a fixed pin gear ring has a large displacement per unit volume, but because of its low allowable speed, it is mostly used as a low-speed hydraulic motor, and it is only used as a hydraulic steering system for vehicles. Metering pumps are used. When the power oil source in the system fails, the pump can be manually used as an emergency oil source.
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