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Vane pump

A vane pump, vane technology, applied in the direction of pump, pump components, pump control, etc., can solve problems such as hydraulic efficiency reduction, and achieve the effect of optimizing starting performance

Inactive Publication Date: 2016-06-29
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise the hydraulic efficiency will decrease

Method used

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Examples

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Embodiment Construction

[0023] Figures 1 to 6 Various views and embodiments of a vane pump according to the invention are shown by way of example. Regardless of the specific embodiment, the vane pump comprises a rotor 3 mounted rotatably in an adjustable stroke ring 1 and driven by a drive shaft 2 , on which rotor vanes 4 are arranged. The stroke ring 1 is adjustable around a pivot point 16 on the vane pump housing by means of an adjustment spring 15 so that in figure 1 The coaxially arranged rotor 3 can be moved to the Figure 1A in different axis positions shown in . The blades 4 are supported radially displaceably in radially extending slots 12 of the rotor 3 (these slots form blade rear pressure chambers) and can be acted upon with blade rear chamber pressure, so that the blades can enter the respective radial direction. in the end position. In order to ensure a corresponding radial movement of each vane 4 even when the vane pump is started, at least one vane 4 is provided with a positive gu...

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Abstract

A vane pump with a rotor (3) rotatably mounted in an adjustable stroke ring (1) and driven by a drive shaft (2) and with several vanes (4) is proposed, which vanes are mounted in a radially displaceable manner in radially running slots (12) of the rotor (3) and are subjected to rear vane chamber pressure. In accordance with the invention, it is provided that at least one forced guide element is allocated to one vane (4) for the radial movement of the vane (4) in such a manner that the forced guide element is integrated into the rotor (3) and / or into the drive shaft (2) without any effect on installation space.

Description

technical field [0001] The invention relates to a vane pump according to the type defined in detail in the preamble of claim 1 . Background technique [0002] For example, mechanical vane pumps with adjustable stroke rings are known. In such a vane pump, a vane rear chamber pressure application device is provided in order to press the corresponding vane with the vane rear chamber pressure during continuous operation, so that the vane moves radially outward. However, when the vane pump is started, the pump pressure must first be established, so there is initially no vane back chamber pressure. In addition, at low ambient temperatures, the problem arises that the blades cannot move out automatically due to the frictional conditions in the joint gap and therefore no pump pressure can be generated. [0003] So-called forced guides are therefore provided in vane pumps. For example, a positive guide ring can be provided on the radially inner side of the rotor for this purpose, ...

Claims

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Application Information

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IPC IPC(8): F04C2/344F04C15/00
CPCF04C2/344F04C15/00F01C21/0836F01C21/0845F01C21/0863F04C2/3442F04C2/3446F04C14/226
Inventor T·施密特T·罗泽
Owner ZF FRIEDRICHSHAFEN AG