CN102966614A - Connecting method of hydraulic parallel type speed transition circuit - Google Patents
Connecting method of hydraulic parallel type speed transition circuit Download PDFInfo
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- CN102966614A CN102966614A CN2012104674042A CN201210467404A CN102966614A CN 102966614 A CN102966614 A CN 102966614A CN 2012104674042 A CN2012104674042 A CN 2012104674042A CN 201210467404 A CN201210467404 A CN 201210467404A CN 102966614 A CN102966614 A CN 102966614A
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- flow control
- valve
- series flow
- speed adjusting
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Abstract
The invention discloses a connecting method of a hydraulic parallel type speed transition circuit. The connecting method comprises the following steps that firstly, two speed adjusting valves connected in parallel are additionally arranged in a circuit consisting of a hydraulic cylinder and a variable pump, so as to realize a transition circuit with two feeding speeds, and the feeding speeds of the two speed adjusting valves are respectively adjusted; then, hydraulic circuits of the two speed adjusting valves connected in parallel are externally provided with a fixed differential pressure reducing valve, and when one speed adjusting valve works and the other speed adjusting valve has no hydraulic fluid passing, the fixed differential pressure reducing valve is adjusted to the maximum opening position; and a travel valve is additionally arranged in a hydraulic circuit between the two speed adjusting valves and the hydraulic cylinder. The connecting method has the beneficial effects that the hydraulic circuit is simplified, the action is reliable, the precision of the converted position is higher, and the sufficient transition precision is realized.
Description
Technical field
The present invention relates to the hydraulics field, relate in particular to the parallel Speed changeover circuit connecting means of a kind of hydraulic pressure.
Background technique
Hydraulics is one of key technology that realizes modernized transmission and control.Hydraulicdriven various element because lightweight, volume is little, can arrange easily and flexibly as required; realize conveniently, easily straight line motion, can realize large-scale stepless speed regulation, automatically realize overload protection in conjunction with state-of-the-art technology automaticity height and manipulation control, but adopt mineral oil as working medium relative movement face lubricating by oneself, long service life.Along with improving constantly of hydraulic machinery automaticity, the hydraulic element number of applications sharply increases, miniaturization of components, the system integration development trend that is inevitable.Particularly hydraulics and sensory technique, the close combination of microelectronic technology, many electrical integrated components and parts of machine (liquid) such as electrohydraulic proportional control valve, digital valve, electro-hydraulic servo cylinder have appearred, make hydraulics at high pressure, at a high speed, the aspect such as high-power, Highgrade integration obtained significant development.Undoubtedly, the computer-aided design of hydraulic element and hydraulic system, computer-aided experiment and real time computer control also are the developing direction of current hydraulics.But the hydraulic system assembly of existing this product exists a lot of problems from operating method, working method, numerous and diverse different amount such as structure, and this causes work poor efficiency, heavier, the high expensive of weight of equipment.
Summary of the invention
The purpose of this invention is to provide and a kind ofly be conducive to simplify oil circuit, can make reliable in action, be conducive to improve conversion positional accuracy, possess the auxiliary parallel Speed changeover circuit connecting means of hydraulic pressure that improves the equipment operation ability, to solve many deficiencies of prior art.
Purpose of the present invention is come specific implementation by the following technical programs:
The parallel Speed changeover circuit connecting means of a kind of hydraulic pressure mainly is comprised of following:
⑴ at first set up two series flow control valves that are connected in parallel between the loop that is comprised of oil hydraulic cylinder and variable displacement pump, to realize the changing-over loop of twice feed speed, the feed speed of two series flow control valves is adjusted respectively;
Then, an external Fixed differential reducing valve on the series flow control valve oil circuit of these two parallel connections, a series flow control valve job and another series flow control valve without oil by the time, regulate Fixed differential reducing valve and be in the maximum open position;
⑶ set up a stroke valve in the oil circuit between two series flow control valves and oil hydraulic cylinder.
The beneficial effect of the parallel Speed changeover circuit connecting means of hydraulic pressure of the present invention is: not only simplified oil circuit, and made reliable in action, the positional accuracy of conversion is also higher, can obtain enough changing-over precision; Simultaneously, be conducive to arrange easily and flexibly as required, can improve the operation controllability, reduce labor intensity.
Embodiment
The parallel Speed changeover circuit connecting means of the described hydraulic pressure of the embodiment of the invention, its key step comprises:
⑴ at first set up two series flow control valves that are connected in parallel between the loop that is comprised of oil hydraulic cylinder and variable displacement pump, to realize the changing-over loop of twice feed speed, the feed speed of two series flow control valves is adjusted respectively;
Then, an external Fixed differential reducing valve on the series flow control valve oil circuit of these two parallel connections, a series flow control valve job and another series flow control valve without oil by the time, regulate Fixed differential reducing valve and be in the maximum open position;
⑶ set up a stroke valve in the oil circuit between two series flow control valves and oil hydraulic cylinder.
Claims (1)
1. the parallel Speed changeover circuit connecting means of hydraulic pressure is characterized in that, mainly is comprised of following steps:
⑴ at first set up two series flow control valves that are connected in parallel between the loop that is comprised of oil hydraulic cylinder and variable displacement pump, to realize the changing-over loop of twice feed speed, the feed speed of two series flow control valves is adjusted respectively;
Then, an external Fixed differential reducing valve on the series flow control valve oil circuit of these two parallel connections, a series flow control valve job and another series flow control valve without oil by the time, regulate Fixed differential reducing valve and be in the maximum open position;
⑶ set up a stroke valve in the oil circuit between two series flow control valves and oil hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104674042A CN102966614A (en) | 2012-11-19 | 2012-11-19 | Connecting method of hydraulic parallel type speed transition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104674042A CN102966614A (en) | 2012-11-19 | 2012-11-19 | Connecting method of hydraulic parallel type speed transition circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102966614A true CN102966614A (en) | 2013-03-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104674042A Pending CN102966614A (en) | 2012-11-19 | 2012-11-19 | Connecting method of hydraulic parallel type speed transition circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN102966614A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743089A (en) * | 1996-07-25 | 1998-04-28 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic control system |
| JP2005061481A (en) * | 2003-08-08 | 2005-03-10 | Shimadzu Corp | Hydraulic lifter for welfare work |
| JP2009261266A (en) * | 2008-04-22 | 2009-11-12 | Kanzaki Kokyukoki Mfg Co Ltd | Hydraulic circuit for lifting and lowering reaping part of combine harvester |
| CN201645235U (en) * | 2009-09-08 | 2010-11-24 | 深圳信息职业技术学院 | Machine power slide double pumps circuit |
-
2012
- 2012-11-19 CN CN2012104674042A patent/CN102966614A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743089A (en) * | 1996-07-25 | 1998-04-28 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic control system |
| JP2005061481A (en) * | 2003-08-08 | 2005-03-10 | Shimadzu Corp | Hydraulic lifter for welfare work |
| JP2009261266A (en) * | 2008-04-22 | 2009-11-12 | Kanzaki Kokyukoki Mfg Co Ltd | Hydraulic circuit for lifting and lowering reaping part of combine harvester |
| CN201645235U (en) * | 2009-09-08 | 2010-11-24 | 深圳信息职业技术学院 | Machine power slide double pumps circuit |
Non-Patent Citations (1)
| Title |
|---|
| 张利平: "《液压气压传动与控制》", 29 February 2012, 西北工业大学出版社 * |
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Application publication date: 20130313 |