Sliding vane pump

Abstract

A vane cell pump has a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in the outer circumference of this rotor, and an outer ring that surrounds the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing, or in a setting ring that can be moved in the pump housing, along predetermined paths. The vane cell pump has transverse grooves disposed in the cylinder mantle surface of the rotor, between the bearing grooves of the vane plates, running over the entire rotor width, disposed parallel to the bearing grooves of the vane plates, spaced apart from the bearing grooves by a bearing crosspiece. These transverse grooves have a non-symmetrical cross-section progression, which has a low point in each cell chamber, which point is always disposed behind the cell chamber center axis, seen in the direction of rotation.

Description

technical field [0001] The invention relates to a sliding vane pump (Flügelzellenpumpen) having: a rotor mounted in a pump housing and driven by a shaft; a plurality of vane plates mounted in the outer circumference of the rotor; an outer ring surrounding the rotor and the vane plates, wherein The outer ring is arranged directly in the pump housing, or in an adjustment ring that can move along a predetermined track in the pump housing. Background technique [0002] Various embodiments of sliding vane pumps have already been described in the prior art. Thus, for example, DE 29 14 282 C2 and DE 103 53 027 A1 each describe adjustable vane pumps with a linearly displaceable adjusting ring for variable delivery performance. [0003] A further embodiment of an adjustable vane pump with an adjusting ring mounted rotatably about a screw has already been described in DE 195 33 686 C2. [0004] In most cases, on both sides of the rotor of the sliding vane pump there is a suction kid...

AI Technical Summary

Problems solved by technology

[0011] But so far, the obvious disadvantage of the above-mentioned structural forms of the sliding vane pumps of the current prior art is that in the case of driving speeds in the range of 4500 rpm up to more than 6000 rpm (that is to say, when using When the sliding vane pump is used, for example, as an oil pump directly driven by the crankshaft of the motor vehicle engine, high power losses, noise generation that increases sharply with increasing speed, and wear that also increases sharply with increasing speed

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