Fig. 2
Internal Gear Pumps
Internal gear pumps are not gear pumps that go inside machinery. They are pumps with a ring gear and an internal gear that revolves around inside this ring gear. So the fluid is contained internally between the ring gear and the driven gear. There are two types of internal gear pump. The normal spur gear type, shown in Figure 2, and the gerotor type pump which uses a different type of gears.Internal Spur Gear Pump
Figure 1 shows the inside view of a typical internal gear pump. The pump shaft drives gear (1) in the direction of the arrows. The teeth on gear (1) mesh with and turn ring gear (2). As the gears unmesh at the bottom, the area in the suction chamber gets bigger. This causes a slight vacuum in the chamber which allows atmospheric pressure acting on the fluid in the tank to push more fluid into the pump via port (4). As the gears turn they form a seal against the sickle shaped segment (6) which traps the fluid between the teeth. The teeth then carry the fluid toward the pressure port (5) and as they re-mesh again they force the fluid under pressure into port (5). Remember, at Central Qld Hydraulics, we take any old pumps and motors that are preserved well, replace their damaged parts to make them go on doing their outstanding work as new pumps and motors.
Fig. 1
1
2
3
4
5
6
A description of how internal gear pumps works
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Copyright © 2013, Central Queensland Hydraulics Pty.Ltd. - Contact our Webmaster
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CENTRAL QUEENSLAND HYDRAULICS
As well as selling new parts and
components, we also service and rebuild
all the products we sell.
We have a comprehensive spare parts
and exchange parts service.
And all work is guaranteed.
We supply all filters from any
manufacturer
We have a comprehensive filter service.
And all work is guaranteed.
All types of hydraulic tooling.
Hydraulic cylinders of all shapes and
sizes.
Hydraulic fittings and hoses.
Fig. 2
Internal Gear Pumps
Internal gear pumps are not gear pumps that go inside machinery. They are pumps with a ring gear and an internal gear that revolves around inside this ring gear. So the fluid is contained internally between the ring gear and the driven gear. There are two types of internal gear pump. The normal spur gear type, shown in Figure 2, and the gerotor type pump which uses a different type of gears.Internal Spur Gear Pump
Figure 1 shows the inside view of a typical internal gear pump. The pump shaft drives gear (1) in the direction of the arrows. The teeth on gear (1) mesh with and turn ring gear (2). As the gears unmesh at the bottom, the area in the suction chamber gets bigger. This causes a slight vacuum in the chamber which allows atmospheric pressure acting on the fluid in the tank to push more fluid into the pump via port (4). As the gears turn they form a seal against the sickle shaped segment (6) which traps the fluid between the teeth. The teeth then carry the fluid toward the pressure port (5) and as they re-mesh again they force the fluid under pressure into port (5). Remember, at Central Qld Hydraulics, we take any old pumps and motors that are preserved well, replace their damaged parts to make them go on doing their outstanding work as new pumps and motors.
Fig. 1
1
2
3
4
5
6
A description of how internal gear pumps works
Copyright © 2013, Central Queensland Hydraulics Pty.Ltd. - Contact our Webmaster
