Structural Characteristics of Multi-Output Internal Gear Pumps

The multi-output internal gear pump features a revolutionary design where two independently operating pumps are integrated within a single pump body. This innovative configuration, common in advanced l.a. gear pumps, provides exceptional versatility in fluid power applications.

The inner pump assembly consists of several key components working in harmony: the pinion gear shaft (4), common gear (3), inner pump front floating side plate (16), rear floating side plate (19), and the inner pump floating crescent filler assembly. This crescent assembly is a sophisticated sub-system comprising the inner pump large crescent plate (5), inner pump small crescent plate (6), inner pump crescent plate sealing roller (7), inner pump crescent plate rotating pin (8), and inner pump crescent plate stop pin set (9).

Complementing this, the outer pump assembly includes the large gear ring (2), common gear (3), outer pump front floating side plate (17), rear floating side plate (19), and the outer pump floating crescent filler assembly – whose structure mirrors that of the inner pump's crescent assembly. This dual-pump design, a hallmark of premium l.a. gear pumps, offers unprecedented flexibility.

By controlling the connection方式 of the inlet and outlet ports of the inner and outer pumps, three distinct operating modes can be achieved: inner pump单独 operation, outer pump单独 operation, or simultaneous operation of both pumps. This versatility allows for three different flow rate outputs from a single pump unit, significantly enhancing system flexibility and reducing the need for multiple separate pumps in complex hydraulic systems. This adaptability makes it one of the most versatile l.a. gear pumps available in the market today.

Both the inner and outer pumps are equipped with sophisticated axial and radial compensation devices, specifically the inner and outer pump axial floating side plates and floating crescent filler plates. These compensation systems represent a critical advancement in l.a. gear pumps technology, addressing one of the primary challenges in gear pump design – minimizing leakage to maximize efficiency.

Axial compensation is achieved through the floating side plates that maintain optimal clearance between the gear faces and the side plates as operating conditions change. This dynamic adjustment ensures that clearance remains minimal regardless of temperature variations, pressure fluctuations, or wear, which would otherwise lead to increased internal leakage.

Similarly, the radial compensation provided by the floating crescent filler plates maintains proper clearance between the gear tips and the crescent surfaces. This radial adjustment is particularly important in l.a. gear pumps as it compensates for manufacturing tolerances, thermal expansion, and wear over time, ensuring consistent performance throughout the pump's operational life.

By effectively managing these clearances through advanced compensation mechanisms, the pump achieves significantly reduced leakage compared to conventional designs. This reduction in internal leakage directly translates to higher volumetric efficiency, one of the most important performance metrics for l.a. gear pumps.

Furthermore, the compensation systems contribute to extended service life by minimizing wear on critical components. The ability to maintain optimal clearances under varying operating conditions also facilitates the pump's operation at higher pressures, expanding its application range to include more demanding hydraulic systems where pressure requirements are substantial. This combination of efficiency, durability, and high-pressure capability makes these pumps stand out among l.a. gear pumps in the industry.

A sophisticated design consideration in this multi-output internal gear pump is the strategic arrangement of gear meshing positions to manage radial forces. This engineering refinement, crucial in high-performance l.a. gear pumps, addresses one of the primary factors affecting pump durability and efficiency.

When both pumps operate simultaneously, pressure oil exerts significant radial forces on the common gear. To mitigate the effects of these forces, the design positions the meshing of the pinion gear with the common gear and the meshing of the common gear with the large gear ring on the same side of the horizontal centerline. This deliberate arrangement ensures that the pressure oil zones of both the inner and outer pumps are located on the same side of the horizontal centerline.

The result of this configuration is a partial cancellation of the radial forces acting on the common gear. In traditional gear pump designs, unbalanced radial forces can lead to increased wear on bearings and other components, reducing efficiency and service life. By balancing these forces through strategic component placement, this design represents a significant advancement in l.a. gear pumps technology.

Reduced bearing wear is a direct benefit of this force-balancing approach. The drive shaft bearings experience less load and stress, even during high-pressure operation, which extends their service life and reduces maintenance requirements. This is particularly important in l.a. gear pumps intended for continuous or heavy-duty applications.

Additionally, the balanced force distribution contributes to improved volumetric efficiency by maintaining more consistent clearances between moving parts. As bearing wear is minimized, the precise alignment of gears is preserved over time, ensuring that efficiency remains high throughout the pump's operational life. This attention to force management demonstrates the comprehensive engineering approach that distinguishes these pumps from conventional l.a. gear pumps, resulting in a more durable, efficient, and reliable fluid power solution.