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Piston pumps and control rings for piston pumps

A control ring and pumping technology, applied in pump control, rotary piston type/swing piston type pump components, rotary piston type pumps, etc., can solve problems such as pre-compression becoming larger, smaller, and pressure pulses

Inactive Publication Date: 2018-12-21
MOOG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An obvious disadvantage of this solution is that in any other control position of the piston pump, the precompression becomes larger / lower, whereby the piston pump still suffers from pressure pulses and the resulting vibrations and disturbing noises

Method used

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  • Piston pumps and control rings for piston pumps
  • Piston pumps and control rings for piston pumps
  • Piston pumps and control rings for piston pumps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] In the following embodiments of the invention which will be shown and described, the manner in which the invention is carried out is illustrated simply by way of example. The invention is not limited to the specific embodiments presented, but includes all variants within the scope of the claims. All figures are schematic.

[0034] figure 1 A displacement pump 200 is disclosed in which the control loop 210 of the present invention is provided. Piston pump 200 is disclosed as a rotary lobe pump. However, the control ring 210 of the present invention is compatible with any piston pump having a fixed pressure chamber. The piston pump 200 includes front and rear shells 101, 102, front and rear plates 103, 104, and a pumping unit 105 is disposed between the front and rear plates. The pumping unit 105 comprises a rotor set consisting of an outer rotor 115 and an inner rotor 116 , whereby the inner rotor 116 is arranged on the eccentric shaft 106 . The pumping unit 105 is ...

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PUM

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Abstract

A control ring (210; 310) for controlling the flow of a pressure medium in a piston pump (200), the control ring extending along the first axis of rotation (ax1) and comprising first and second axial surfaces, the first axial surface It has an interface portion (220; 320), the interface portion (220; 320) is provided with at least first and second orifices (221, 222; 221, 222), the first and second orifices are arc-shaped and covered by the second The first and second ridges (215, 216; 315, 316) are spaced apart, the first ridge is provided with a first tapering groove (240; 340) extending from the first opening into the first Ridge, and make its wide side in the direction of the first orifice, make its tip in the direction of the second orifice, the first tapering groove extends into the first ridge in the following manner, that is, in At different radial distances (r1, r2), the angular distance (ad1, ad2) across the first ridge between the first and second orifice is different.

Description

technical field [0001] The invention relates to a piston pump and a control of the piston pump, in particular to a control ring for the piston pump. Background technique [0002] In piston pumps, such as a bent axis piston or gerotor pump, the displacement of the fixed pressure chamber is usually controlled by means of a control ring. In order to control the flow of pressure medium exiting the piston pump, the control ring is provided with orifices. Typically, there are two orifices that are separated by a middle portion called a "land". [0003] When the piston / pressure chamber passes the ridge between the high pressure port and the low pressure port of the control ring, the pressure drops or increases rapidly due to the blocking of the pressure medium by the ridge. When the orifice has crossed the ridge and reached the orifice in the control ring, the pressure spike / drop causes vibration and noise to occur due to the large pressure difference. [0004] Precompression / pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C15/06F04B53/16
CPCF01C1/103F01C20/14F04C2/102F04C14/14F16H39/36F04B11/00F04C2/10F04C15/0049F04C15/06
Inventor J·福塞尔C·奥登马克
Owner MOOG INC