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Displacement pump and a control ring for a displacement pump

A control ring and control piston technology, which is applied in pump control, rotary piston type/oscillating piston type pump components, rotary piston type pumps, etc., can solve problems such as vibration and interference noise, pre-compression becoming larger and smaller, etc.

Inactive Publication Date: 2015-07-15
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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  • Displacement pump and a control ring for a displacement pump
  • Displacement pump and a control ring for a displacement pump
  • Displacement pump and a control ring for a displacement pump

Examples

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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

Control ring (210; 310) for controlling the flow of a pressure medium in a displacement pump (200), said control ring (210; 310) is; €¢ extending along a first rotational axis (ax1), €¢ a first and a second axial surface (213, 214; 313, 314), wherein said first axial surface (213; 313) having an interface section (220; 320) provided with at least a first and a second opening (21, 22; 221, 222), which first and second openings (221, 222; 321, 322) are arc shaped and are separated by a first and a second land (215, 216; 315, 316), characterised in, that said first land (215, 315) is provided with a first tapered groove (), extending from said first opening (221; 321) into said first land (215; 315), and having its broader edge in direction of said first opening (221; 321) and its tip in direction of the other of said second opening (222, 322), wherein said first tapered groove (240; 340) extends into said first land (215; 315) such that an angular distance (ad1, ad2) between said first and second opening over said first land (215; 315) is different at different radial distances (r1, r2).

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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IPC IPC(8): F04C15/06F04B53/16
CPCF04C14/14F04B11/00F01C1/103F01B3/104F16H39/36F04C2/10F01C20/14F01B3/0055F04C15/0049F04C2/102F04B1/12F04C15/06
Inventor J·福塞尔C·奥登马克
Owner MOOG INC