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Improved fluid control spool

A technology for controlling spools, fluid control devices, used in pump control, fluid pressure actuation devices, components of pumping devices for elastic fluids, etc.

Active Publication Date: 2018-04-17
丹佛斯动力系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] While fluid control devices of the type in question are practically feasible, there are still drawbacks

Method used

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  • Improved fluid control spool
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Examples

Experimental program
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Embodiment Construction

[0028] exist figure 1 , the figure shows a first possible design of the control circuit 1 for the variable hydraulic pump 2 . The fluid pumping characteristics of the variable hydraulic pump 2 can be varied by means of the servo piston 3 . The position of the servo piston 3 determines the fluid volume (fluid flux) pumped by the variable hydraulic pump 2 per revolution. The variable hydraulic pump 2 is driven by an internal combustion engine (not shown) via a rotary shaft 4 . Due to the controllability of the variable hydraulic pump 2, a variable fluid flow can be achieved even if the internal combustion engine (drive engine) is running at a constant rotational speed. Control loop 1 can likewise be used if the rotational speed of the drive engine is primarily determined by another function, as is the case for cars or trucks with a standard gearbox transmission. Here, the rotational speed of the driving engine is mainly determined by the speed of the car / vehicle. However, du...

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PUM

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Abstract

The invention relates to a fluid control device (7, 30) that comprises a fluid transfer chamber (17) and a first fluid conduit (13), a second fluid conduit (11) and a third fluid conduit (14) which are fluidly connected to the fluid transfer chamber (17). A control spool (15) is arranged movably inside the fluid transfer chamber (17) in a way that the first fluid conduit (13) and the third fluid conduit (14) can be selectively fluidly connected to the second fluid conduit (11) through the fluid transfer chamber (17). The control surfaces (19, 20) of the control spool (15) are arranged in the vicinity of the first fluid conduit (13) or the third fluid conduit (14).

Description

technical field [0001] The present invention relates to a fluid control device comprising a fluid delivery chamber, a first fluid conduit fluidly connected to the fluid delivery chamber, a second fluid conduit and a third fluid conduit, and further comprising a control spool which can Movably disposed within the fluid delivery lumen such that the first fluid conduit and the third fluid conduit can be selectively fluidly connected to the second fluid conduit through the fluid delivery lumen. The present invention also relates to a hydraulically adjustable fluid working machine, comprising a fluid control device and a control member for adjusting the performance of the hydraulically adjustable fluid working machine. Background technique [0002] Hydraulic pumps that are variable in fluid volume pumped with respect to one revolution of the hydraulic pump (ie, fluid throughput is variable) are well known in the art. They are widely used if hydraulic pumps are driven at a consta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F04B53/10
CPCF04B53/10F15B13/02F15B2211/20553F04B1/326F16K11/07F16K31/0613F04B49/002F16K11/0708F15B11/08F15B13/0402F15B2211/20546
Inventor 斯坦尼斯拉夫·斯莫尔卡
Owner 丹佛斯动力系统有限公司
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