PUMP DEVICE

摘要

The invention relates to a pump device for pumping a liquid, comprising a hydraulics housing (12), in which a pump ring (14) with a running surface (46), a pump ring carrier (16) and an eccentric (18), which can be driven by a shaft (20), are accommodated, said shaft defining an axial and a radial direction. The hydraulics housing (12) has an annular portion (22) and a first and a second lateral portion (24, 26), the two lateral portions (24, 26) being arranged opposite each other. The pump ring (14) is mounted between the two lateral portions (24, 26) of the hydraulics housing (12) at least in some sections. The profile of the running surface (46) has a contour with a curvature that changes at least in sections, and specifically in such a way that the curvature increases at least in some sections towards the ends of the running surface (46).