CN101446359A - Speed and pressure regulating digital valve - Google Patents
Speed and pressure regulating digital valve Download PDFInfo
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- CN101446359A CN101446359A CNA2008101637454A CN200810163745A CN101446359A CN 101446359 A CN101446359 A CN 101446359A CN A2008101637454 A CNA2008101637454 A CN A2008101637454A CN 200810163745 A CN200810163745 A CN 200810163745A CN 101446359 A CN101446359 A CN 101446359A
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- pressure oil
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Abstract
The invention discloses a speed and pressure regulating digital valve. A valve cavity is arranged in a valve body. The valve cavity is communicated with a first pressure oil channel from an oil pump and a second pressure oil cannel to a working oil cylinder. A sliding valve core is arranged in the valve cavity. The valve core forms a first throttle part between the first pressure oil channel and the second pressure oil channel. The digital valve is characterized in that an oil return port is arranged in the valve cavity. The valve core forms a second throttle part between the first pressure channel and the oil return port. Thread on one end of the valve cavity and inner thread on the valve body compose a thread pair. An installed gear arranged on the end part of the valve core and a gear on an axial end of a stepping motor compose a gear pair. The minimal rotation of the stepping motor is transferred into minimal movement of the valve core corresponding to the valve body. The opening degree of an oil inlet port and the oil return port is controlled and changed. The digital valve with double functions of regulating speed and pressure can also be applied to systems that require long time maintenance of pressure.
Description
Technical field
The present invention relates to a kind of hydrovalve.
Background technique
Traditional hydraulic system with speed governing, pressure regulation dual functions as shown in Figure 1, generally adopts the series flow control valve speed governing, the structural type of this two valve parallel connections of pressure valve pressure regulation, and finish with directional control valve conversion the centre again.Obviously, this system uses element many, and speed of response is slow, realizes that automation is very difficult.
Series flow control valve as shown in Figure 1, P0 is the pressure oil from oil pump among the figure, P1 is the pressure oil of operating cylinder, T is a return opening.It is made up of two-part: a part is an overflow portion, and the thrust that forms when pressure reduction (P0-P1) just makes the spool of relief valve move during greater than the thrust of spring, makes P0 and T connection, reaches the purpose of overflow, the direct oil sump tank of the fluid that overflows; Another part is the throttling part between P0 and P1, i.e. throttle valve, and as shown in Figure 2, this throttle valve can be regulated between zero aperture and maximum opening, thereby changes the fluid flow that enters oil cylinder, reaches the purpose of regulating system speed.
This series flow control valve does not possess the function of pressure regulation, and as reaching the maintenance system pressure, promptly the function of " holding lotus " just can not realize more.
Summary of the invention
The present invention will overcome the shortcoming of existing series flow control valve and pressure regulator valve, provide a kind of digital valve with speed governing, pressure regulation dual functions, and the system that is applicable to need keep system pressure, i.e. occasion of " holding lotus " for a long time.
Speed and pressure regulating digital valve of the present invention, valve pocket is arranged in the valve body, described valve pocket is communicated with the first pressure oil passage and the second pressure oil passage that removes operating cylinder from oil pump, one spool that slides is arranged in the described valve pocket, described spool forms the first throttle part between the first pressure oil passage and the second pressure oil passage, it is characterized in that: also have return opening in the described valve pocket, described spool is forming the second throttling part between the second pressure oil passage and return opening; The screw thread of described spool one end and the internal thread on the described valve body constitute screw thread and pay, be arranged on the gear of spool end and the gear of stepper motor axle head and constitute a pair of gear pair, the minor rotation of stepper motor changes spool into does small moving relative to valve body, control break filler opening and return opening aperture.
Between between the described return opening and the first pressure oil passage across the second pressure oil passage.
Following explanation earlier digital valve technological scheme of the present invention.
As shown in Figure 3, with traditional simple two general formula throttling parts, change into slide valve type Three way type binodal stream part, this slide valve type binodal streaming part as shown in Figure 3, three kinds of groundwork states are arranged: (A) unloaded state: as shown in Figure 6, the first pressure oil passage and the second pressure oil passage are obstructed, be that spool and filler opening are negative aperture, simultaneously, the second pressure oil passage communicates with return opening, and promptly spool and return opening are positive aperture; (B) loaded state: as shown in Figure 7, the first pressure oil passage communicates with the second pressure oil passage, and promptly spool and filler opening are positive aperture, and simultaneously, the second pressure oil passage and return opening are obstructed, and promptly spool and return opening are negative aperture; (C) hold the lotus state: as shown in Figure 8, the first pressure oil passage and the second pressure oil passage are obstructed, and promptly spool and filler opening are negative aperture, simultaneously, the second pressure oil passage and return opening are obstructed, and promptly spool and return opening are negative aperture basically, but maintain the leakage of appropriateness.Want the strict lotus of realizing loading and holding, must further rely on the reverse feedback control technique, this point is introduced below.Be to realize like this during the move left and right of spool among Fig. 5, as shown in Figure 3, the screw thread of spool one end is paid with the internal thread formation screw thread that is fixed on the valve body, constitute a pair of gear pair by the gear of spool end installation and the gear of stepper motor axle head again, the minor rotation of stepper motor just can change spool into and does small moving relative to valve body like this, thereby reaches the purpose of control break filler opening and return opening aperture.
Thereby use this digital valve to constitute a kind of hydraulic system and satisfy industrial extensive needs with automatic speed regulation, pressure regulation dual functions with speed governing, pressure regulation dual functions.This automatic control system in the testing machine industry, has a wide range of applications especially in instrument and apparatus observing and controlling industry.
Advantage of the present invention is: possess speed governing, pressure regulation dual functions simultaneously, can adopt digitizing accurately to control, the system of being applicable to need keep system pressure for a long time, and promptly the occasion of " holding lotus " can constitute a kind of hydraulic system with automatic speed regulation, pressure regulation dual functions.
Description of drawings
Fig. 1 is the oil circuit schematic representation of traditional series flow control valve
Fig. 2 is the schematic representation of traditional series flow control valve
Fig. 3 is a schematic representation of the present invention
Fig. 4 is an oil circuit schematic representation of the present invention
Fig. 5 is the sectional view of valve body of the present invention
Fig. 6 is a unloaded state schematic representation of the present invention
Fig. 7 is a loaded state schematic representation of the present invention
Fig. 8 is the lotus view of holding of the present invention
Embodiment
Speed and pressure regulating digital valve of the present invention, valve pocket 12 is arranged in the valve body 11, described valve pocket 13 is communicated with the first pressure oil passage 21 and the second pressure oil passage 22 that removes operating cylinder from oil pump, one spool 13 that slides is arranged in the described valve pocket 12, described spool 13 forms the first throttle part between the first pressure oil passage 21 and the second pressure oil passage 22, also have return opening 3 in the described valve pocket, described spool 12 is forming the second throttling part between the second pressure oil passage 22 and return opening 3; The screw thread of described spool 13 1 ends and the internal thread on the described valve body 11 constitute screw thread and pay, the gear 4 that is arranged on spool 13 ends constitutes a pair of gear pair with 51 gears of the axle head of stepper motor 5, the minor rotation of stepper motor 5 changes spool 13 into does small moving relative to valve body 11, control break filler opening and return opening 3 apertures.
Between between the described return opening 3 and the first pressure oil passage 21 across the second pressure oil passage 22.
Following explanation earlier digital valve technological scheme of the present invention.
As shown in Figure 5, with traditional simple two general formula throttling parts, change into slide valve type Three way type binodal stream part, this slide valve type binodal streaming part has three kinds of groundwork states: (A) unloaded state: as shown in Figure 6, the first pressure oil passage 21 and the second pressure oil passage 22 are obstructed, be that spool 13 is negative aperture with filler opening, simultaneously, the second pressure oil passage 22 communicates with return opening 3, and promptly spool 13 is positive aperture with return opening 3; (B) loaded state: as shown in Figure 7, the first pressure oil passage 21 communicates with the second pressure oil passage 22, and promptly spool 13 is positive aperture with filler opening, and simultaneously, the second pressure oil passage 22 is obstructed with return opening 3, and promptly spool 13 is negative aperture with return opening 3; (C) hold the lotus state: as shown in Figure 8, the first pressure oil passage 21 and the second pressure oil passage 22 are obstructed, and promptly spool 13 is negative aperture with filler opening, simultaneously, the second pressure oil passage 22 is obstructed with return opening 3, and promptly spool 13 is negative aperture basically with return opening 3, but maintains the leakage of appropriateness.Want the strict lotus of realizing loading and holding, must further rely on the reverse feedback control technique, this point is introduced below.Be to realize like this during the move left and right of spool among Fig. 5, as shown in Figure 3, the screw thread 131 of spool 13 1 ends is paid with the internal thread 111 formation screw threads that are fixed on the valve body 11, again by the gear 4 of spool 13 ends installation and a pair of gear pair of gear 51 formations of the axle head of stepper motor 5, the minor rotation of stepper motor 5 just can change spool 13 into and does small moving relative to valve body 11 like this, thereby reaches the purpose of control break filler opening and return opening aperture.
Thereby use this digital valve to constitute a kind of hydraulic system and satisfy industrial extensive needs with automatic speed regulation, pressure regulation dual functions with speed governing, pressure regulation dual functions.This automatic control system in the testing machine industry, has a wide range of applications especially in instrument and apparatus observing and controlling industry.
Advantage of the present invention is: possess speed governing, pressure regulation dual functions simultaneously, can adopt digitizing accurately to control, the system of being applicable to need keep system pressure for a long time, and promptly the occasion of " holding lotus " can constitute a kind of hydraulic system with automatic speed regulation, pressure regulation dual functions.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (2)
1. speed and pressure regulating digital valve, valve pocket is arranged in the valve body, described valve pocket is communicated with the first pressure oil passage and the second pressure oil passage that removes operating cylinder from oil pump, one spool that slides is arranged in the described valve pocket, described spool forms the first throttle part between the first pressure oil passage and the second pressure oil passage, it is characterized in that: also have return opening in the described valve pocket, described spool is forming the second throttling part between the second pressure oil passage and return opening; The screw thread of described spool one end and the internal thread on the described valve body constitute screw thread and pay, be arranged on the gear of spool end installation and the gear of stepper motor axle head and constitute a pair of gear pair, the minor rotation of stepper motor changes spool into does small moving relative to valve body, control break filler opening and return opening aperture.
2. speed and pressure regulating digital valve as claimed in claim 1 is characterized in that: between between the described return opening and the first pressure oil passage across the second pressure oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101637454A CN101446359A (en) | 2008-12-30 | 2008-12-30 | Speed and pressure regulating digital valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101637454A CN101446359A (en) | 2008-12-30 | 2008-12-30 | Speed and pressure regulating digital valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101446359A true CN101446359A (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101637454A Pending CN101446359A (en) | 2008-12-30 | 2008-12-30 | Speed and pressure regulating digital valve |
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| CN (1) | CN101446359A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943190A (en) * | 2010-09-24 | 2011-01-12 | 许新跃 | Numerical control proportioning hydraulic directional control valve |
| CN101691860B (en) * | 2009-09-17 | 2011-04-27 | 高志明 | Pressure shut-off valve used for power controller |
| CN104315198A (en) * | 2014-08-19 | 2015-01-28 | 干平 | Air inlet valve and energy-saving air inlet system |
| CN105347253A (en) * | 2015-11-16 | 2016-02-24 | 湖北洋田塑料制品有限公司 | Stereoscopic warehouse with hydraulic searching function |
| CN106837922A (en) * | 2017-04-06 | 2017-06-13 | 上海欧联流体控制技术有限公司 | A kind of digital cylinder |
| CN111365314A (en) * | 2020-03-26 | 2020-07-03 | 浙江大学宁波理工学院 | Fault tolerant reversing valve |
-
2008
- 2008-12-30 CN CNA2008101637454A patent/CN101446359A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691860B (en) * | 2009-09-17 | 2011-04-27 | 高志明 | Pressure shut-off valve used for power controller |
| CN101943190A (en) * | 2010-09-24 | 2011-01-12 | 许新跃 | Numerical control proportioning hydraulic directional control valve |
| CN104315198A (en) * | 2014-08-19 | 2015-01-28 | 干平 | Air inlet valve and energy-saving air inlet system |
| CN105347253A (en) * | 2015-11-16 | 2016-02-24 | 湖北洋田塑料制品有限公司 | Stereoscopic warehouse with hydraulic searching function |
| CN106837922A (en) * | 2017-04-06 | 2017-06-13 | 上海欧联流体控制技术有限公司 | A kind of digital cylinder |
| CN106837922B (en) * | 2017-04-06 | 2018-07-31 | 上海欧联流体控制技术有限公司 | A kind of digital cylinder |
| CN111365314A (en) * | 2020-03-26 | 2020-07-03 | 浙江大学宁波理工学院 | Fault tolerant reversing valve |
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| PB01 | Publication | ||
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Open date: 20090603 |