To reduce the leakage losses, the ring gear of an internal gear pump is pressed against the internal gear and a sickle-shaped body is placed between the ring gear and internal gear, minimising the play of the cog tips, depending on the pressure (Figure R 1). The radial gap compensation makes a significant contribution to allowing such internal gear pumps to work at pressures of 300 to 350 bar.
![865a4aaec3db46e4e1f24c2e7e2cb5be0ba4e6b9 0001_radialespaltkompensation.gif](/fileadmin/smc/files/865a4aaec3db46e4e1f24c2e7e2cb5be0ba4e6b9.gif)
Figure R 1: Radial gap compensation