Fluid pressure driving apparatus and method for driving flow control valve

A technology for flow control valves and driving devices, which is applied in the direction of valve devices, valve operation/release devices, valve details, etc., and can solve problems such as spool sticking

Active Publication Date: 2020-07-07
NABLESCO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As one of the failures of the flow control valve that controls the discharge amount of working oil, there is a failure that foreign matter bites into the spool of the flow control valve and causes the spool to stick

Method used

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  • Fluid pressure driving apparatus and method for driving flow control valve
  • Fluid pressure driving apparatus and method for driving flow control valve
  • Fluid pressure driving apparatus and method for driving flow control valve

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Experimental program
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no. 2 Embodiment approach

[0090] The second embodiment differs from the first embodiment in the processing operations of the biting estimation unit 9 and the drive control unit 10 .

[0091] Figure 6 It is a block diagram showing a schematic configuration of a fluid pressure drive device 1 according to the second embodiment. Figure 6 The fluid pressure driving device 1 is equipped with a moving speed determination unit 14 instead of figure 1 The position deviation judging part 12 and the duration judging part 13. When the moving speed determination unit 14 determines that the driving force of the spool 2a of the flow control valve 2 is equal to or greater than the first threshold, it determines whether the moving speed of the spool 2a is equal to or less than the third threshold.

[0092] in addition, Figure 6 The fluid pressure drive device 1 includes a displacement detection unit 15 . The displacement detection unit 15 detects the displacement of the spool 2a, that is, the moving speed. The ...

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PUM

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Abstract

A fluid pressure driving apparatus and a method for driving a flow control valve are provided. Even if foreign matter bites into a spool, the spool is not fixed. The fluid pressure driving apparatus includes: a flow control valve having a movable portion that controls the discharge amount of a working fluid according to the position of the movable portion; and a bite estimation portion that is estimated to be in a bite state in at least one of the following cases: a case where the movable portion does not reach the movement target position within a predetermined time from the moment the drivecommand to move the movable portion to the movement target position is issued, and a case that the movable portion does not reach the predetermined moving speed when moving to the movement target position; and a drive control unit which, after the bite state is estimated, drives the movable portion with a driving force greater than the driving force of the movable portion when it is not in the biting state, at a moment of sending a drive command of the movable portion in the direction opposite to the direction of the movable portion when the bite state is reached.

Description

technical field [0001] This application is based on the Japanese Patent Application (Special Application No. 2018-243234, filing date: 12 / 26 / 2018), and the application enjoys priority rights. By referring to the statement, all contents of the statement are included. [0002] The invention relates to a fluid pressure driving device and a driving method of a flow control valve. Background technique [0003] As one of the failures of the flow control valve that controls the discharge amount of hydraulic oil, there is a failure in which foreign matter bites into the spool of the flow control valve and causes the spool to stick. For the spool, it is necessary to reliably seal the working oil in the neutral position, and when the spool moves from the neutral position, the working oil will be sprayed out. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open No. 2016-50585 Contents of the invention [0007] The pro...

Claims

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Application Information

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IPC IPC(8): F16K31/06F16K37/00F16K11/07
CPCF16K31/0613F16K37/0083F16K37/005F16K31/06F16K31/12
Inventor 冈本武史
Owner NABLESCO CORP
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