The main difference between internal and external gear hydraulic pumps is the arrangement and location of the gears within the pump. Let's examine each type in more detail: Internal gear hydraulic pump: - In internal gear pumps, the gears are located in the casing or case. The pump consists of an outer ring gear and an inner gear, and the inner gear rotates inside the outer gear. - External gears have teeth on the outside diameter, while internal gears have teeth on the inside diameter. These gears mesh together to create a seal between the teeth as they rotate. - As the gear rotates, fluid is trapped in the space between the gear teeth and the pump casing, creating a suction zone and a pressure zone. - The rotation of the gear causes the fluid to flow from the suction side to the pressure side, thereby creating hydraulic flow. -Internal gear pumps are known for their smooth and efficient operation, low noise levels and ability to handle high pressures. They are commonly used in a variety of hydraulic systems including industrial machinery, mobile equipment and automotive applications. External gear hydraulic pump: - In external gear pumps, the gears are located outside the pump casing. A pump usually consists of two meshing gears: a drive gear and a driven gear. - The driving gear is connected to the input shaft of the pump and rotates, driving the driven gear to rotate. - Both gears have teeth on the outer diameter that mesh together to create a seal between the teeth. - As the gear rotates, fluid is trapped in the space between the gear teeth and the pump casing, creating a suction zone and a pressure zone. - The rotation of the gear causes the fluid to flow from the suction side to the pressure side, thereby creating hydraulic flow. -External gear pumps are generally more compact and cost-effective than internal gear pumps. They are often used in applications where space is limited, such as small hydraulic systems, power units, and auxiliary functions in large hydraulic systems. 90-L-130-KA-5-DE-80-L-3-C8-H-03-GBA-29-29-24 90L130KA5DE80L3C8H03GBA292924 90L130-KA-5-DE-80-R-3-C8-F-03-GBA-35-35-24 90L130KA5DE80R3C8F03GBA353524 90-L-130-KA-5-DE-80-R-3-C8-F-03-GBA-35-35-24 90L130KA5DE80R3C8F03GBA353524 90L130-KA-5-DE-80-R-3-F1-F-00-GBA-14-14-20 90L130KA5DE80R3F1F00GBA141420 90-L-130-KA-5-DE-80-R-3-F1-F-00-GBA-14-14-20 90L130KA5DE80R3F1F00GBA141420 90L130-KA-5-DE-80-R-3-F1-F-03-GBA-14-14-20 90L130KA5DE80R3F1F03GBA141420 90-L-130-KA-5-DE-80-R-3-F1-F-03-GBA-14-14-20 90L130KA5DE80R3F1F03GBA141420 90L130-KA-5-DE-80-R-3-F1-F-03-GBA-38-38-24 90L130KA5DE80R3F1F03GBA383824 90-L-130-KA-5-DE-80-R-3-F1-F-03-GBA-38-38-24 90L130KA5DE80R3F1F03GBA383824 90L130-KA-5-DE-80-R-4-F1-H-03-GBA-35-35-24 90L130KA5DE80R4F1H03GBA353524 In conclusion, the main difference between an internal gear hydraulic pump and an external gear hydraulic pump is the position of the gears. The gears of an internal gear pump are located inside the pump casing, while the gears of an external gear pump are located outside the pump casing. Each type has its advantages and applications, and the choice depends on factors such as system requirements, available space, and desired performance characteristics. certainly! The following additional points continue to discuss the difference between internal and external gear hydraulic pumps: 1. Flow characteristics: Internal gear pumps generally provide more uniform and consistent flow characteristics compared to external gear pumps. Internal gear design provides smoother fluid displacement, reducing flow pulsation and vibration. This makes internal gear pumps suitable for applications requiring precise and steady flow, such as in hydraulic systems operating sensitive control valves or actuators. 2. Operating speed: External gear pumps are generally capable of operating at higher speeds than internal gear pumps. External gear design allows for more efficient power transfer, allowing for faster revs without sacrificing performance. This makes external gear pumps suitable for applications requiring high speed operation, such as certain industrial machinery or power units. 3. Resistance to contaminants: Compared with external gear pumps, internal gear pumps have better tolerance to contaminants in hydraulic oil. The internal gear design provides a tighter clearance between the gear and the pump casing, which helps prevent particulate matter or air bubbles from entering the pump. This makes internal gear pumps more suitable for applications where the hydraulic system may be exposed to contaminants or where it is difficult to keep the hydraulic oil clean. 4. Noise level: Internal gear pumps are generally quieter in operation compared to external gear pumps. Internal gear design, with gears rotating inside the housing, helps reduce noise and minimize vibration. This makes internal gear pumps more suitable for applications where noise reduction is important, such as in environments where noise levels need to be kept low or in machines operating close to operators or other equipment. 90-L-130-KA-5-DE-80-R-4-F1-H-03-GBA-35-35-24 90L130KA5DE80R4F1H03GBA353524 90L130-KA-5-DE-80-S-3-C8-H-00-GBA-32-32-24 90L130KA5DE80S3C8H00GBA323224 90-L-130-KA-5-DE-80-S-3-C8-H-00-GBA-32-32-24 90L130KA5DE80S3C8H00GBA323224 90L130-KA-5-DE-80-S-3-C8-H-03-GBA-35-35-24 90L130KA5DE80S3C8H03GBA353524 90-L-130-KA-5-DE-80-S-3-C8-H-03-GBA-35-35-24 90L130KA5DE80S3C8H03GBA353524 90L130-KA-5-DE-80-S-4-F1-H-03-GBA-42-42-24 90L130KA5DE80S4F1H03GBA424224 90-L-130-KA-5-DE-80-S-4-F1-H-03-GBA-42-42-24 90L130KA5DE80S4F1H03GBA424224 90L130-KA-5-NN-80-L-3-C8-F-03-GBA-38-14-30 90L130KA5NN80L3C8F03GBA381430 90-L-130-KA-5-NN-80-L-3-C8-F-03-GBA-38-14-30 90L130KA5NN80L3C8F03GBA381430 90L130-KA-5-NN-80-L-3-C8-F-03-GBA-42-42-24 90L130KA5NN80L3C8F03GBA424224 5. Maintenance and serviceability: External gear pumps generally have better access to gears and other internal components, making them easier to service or repair than internal gear pumps. External gear pumps are generally simpler in design with fewer internal components, facilitating maintenance tasks and reducing downtime. This can be advantageous in applications where ease of maintenance or quick repairs are critical, such as in mobile equipment or remote locations. It is worth noting that internal and external gear hydraulic pumps have their own advantages and disadvantages, and the choice between them depends on the specific situation of the application. Factors such as flow characteristics, operating speed, contaminant tolerance, noise levels and maintenance considerations should be carefully evaluated when selecting the appropriate pump type for a particular hydraulic system.