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Ring cam and fluid-working machine including ring cam

A technology for fluid working machines and cams, applied in cams, machines/engines, liquid variable capacity machines, etc., can solve problems such as ring cam wear, and achieve the effect of reducing the wear rate

Inactive Publication Date: 2012-05-30
ARTEMIS INTELLIGENT POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the inherent weight of the multiple rotating parts can cause excessive ring cam wear

Method used

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  • Ring cam and fluid-working machine including ring cam
  • Ring cam and fluid-working machine including ring cam
  • Ring cam and fluid-working machine including ring cam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0138] Referring to Figure 1(b), a portion of an annular cam 1 is formed by cam segments 5 and 7 fastened by bolts 3 extending from openings 4 in the surface of the cam segment and securing the cam segments onto a cam support structure 2 . Additional cam segments (not shown) are fastenable while the cam support structure is still in place to complete the ring cam. The cam support structure is connected to a drive shaft 10 (which in normal use rotates in direction B) through which torque is received from an energy source (eg the blades of a wind or tidal generator).

[0139] Each cam segment has a piston facing surface 15, 16 which defines a part of the working surface of the ring cam. Thus, the annular cam has an active surface defined by cam segments fastened around the circumference of the drive shaft. The working surface is corrugated and includes a plurality of waves (defined relative to the direction of rotation) having a leading surface 70 and a following surface 72 . ...

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PUM

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Abstract

A fluid-working machine comprising a ring cam (1), at least one piston (11) defining a working chamber, and at least one valve (19, 21) associated with the or each working chamber for connecting the working chamber alternately to low and high pressure manifolds(23, 25) in phased relationship to cycles of working chamber volume. The ring cam has a wave-like cam working surface for operative engagement with the at least one piston. The waves of the wave-like cam surface each having a leading face (70) and a trailing face (72) and discontinuities (4), such as apertures (4) to retain bolts (3), are located in the working surface on whichever of the leading face and the trailing face the at least one piston does least work during normal operation resulting from the flow of fluid into and out of the working chamber in phased relationship to cycles of working chamber volume. As a result, there is reduced wear on cam following elements, such as piston rollers (9).

Description

technical field [0001] The present invention relates to a ring cam for a fluid working machine. Of particular relevance to the present invention are applications in which ring cams are subjected to particularly high forces in use, and in particular ring cams for large fluid working machines, for example in the nacelle of a wind turbine. Background technique [0002] Fluid-working machines include fluid-driven and / or fluid-driving machines, such as pumps, motors, and machines that can function as pumps or as motors in different operating modes. [0003] When the fluid working machine is operated as a pump, a low pressure manifold typically acts as a net source of working fluid and a high pressure manifold typically acts as a net sink of working fluid . When a fluid working machine is operated as a motor, a high pressure manifold typically acts as a net source of fluid and a low pressure manifold typically acts as a net sink of fluid. In this specification and the appended ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03C1/04F04B1/06F04B9/04F04B27/04F04B49/06F01B1/06F16H53/02F04B1/04
CPCF03C1/0409F04B1/053F04B17/02F01B1/0648F03C1/04F04C23/02F04B1/066F04B1/0413F04B1/04F03C1/053F03C1/0466F04B27/0414F04B49/065F01B1/062F04B9/042F16H53/025Y02P80/10F01B9/06F04B1/06F04B9/04
Inventor W·H·S·瑞普恩R·G·福克斯
Owner ARTEMIS INTELLIGENT POWER