CN101871475B - Mechanical servo control valve - Google Patents
Mechanical servo control valve Download PDFInfo
- Publication number
- CN101871475B CN101871475B CN 201010223095 CN201010223095A CN101871475B CN 101871475 B CN101871475 B CN 101871475B CN 201010223095 CN201010223095 CN 201010223095 CN 201010223095 A CN201010223095 A CN 201010223095A CN 101871475 B CN101871475 B CN 101871475B
- Authority
- CN
- China
- Prior art keywords
- valve
- spool
- valve body
- hole
- servo control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 12
- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Abstract
The invention relates to a mechanical servo control valve which comprises a valve body, wherein the valve body is provided with an oil inlet and an oil outlet and is internally provided with an oil path and a valve plug, a valve bush is sleeved outside the valve plug, and the upper end of the valve plug is fixed with an operating rod. The mechanical servo control valve is characterized in that the valve bush is provided with a feedback rod along the radial direction of the valve plug, the valve bush is radially provided with a first through hole, the middle part of the valve plug is respectively provided with a second through hole and a slot, the lower part of the valve plug is provided with a groove, the slot of the valve plug is internally provided with a spring seat which is internally provided with a spring; and the first through hole and the second through hole are communicated with the oil path in the valve body. An adjusting seat is arranged between the valve plug and the valve body. A limit block is arranged between the adjusting seat and the operating rod. An adjusting screw is arranged on the feedback rod. A sealing nut is arranged between the adjusting screw and the valve body. The adjusting seat and the seal body are sealed by using an O-shaped sealing ring. The invention simplifies the control structure and has convenient installation, small size, light weight and simple structure.
Description
Technical field
The present invention relates to a kind of mechanical servo control valve, belong to the hydraulic control field.
Background technique
Along with the development of hydraulics, new requirement has been proposed for the Variable Control mechanism of plunger pump.Hydraulic control generally divides pump control system and valve control system since pump control system to have system architecture simple, integrated height; The pressure loss is little, and the characteristics that efficient is high are used widely in closed circuit; Mechanically controlled valve is indispensable core component in this control system; Its control accuracy, sensitivity, mechanisms etc. are heavy to closing.Therefore, the performance of direct variation pump of the performance of mechanically controlled valve and closed circuit, it is low that control accuracy appears in present mechanically controlled valve often, reflects insensitively, and amount of leakage is big, and efficient is low, and the life-span is short, and inconvenient installation influences problems such as systematic function.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the existing technology, a kind of stable performance is provided, the mechanical servo control valve that reliability is high.
According to technological scheme provided by the invention, said mechanical servo control valve comprises valve body, on valve body, is provided with filler opening and oil outlet, in valve body, is provided with oil circuit and spool, and sheathed valve pocket outside spool is at the upper end of spool fixing operation bar; It is characterized in that: the radially installation feedback rod of spool in said valve pocket upper edge; In the groove of spool, be provided with spring seat, spring is installed in spring seat.
Between said spool and valve body, be provided with the adjustment seat.Between said adjustment seat and operating stem, be provided with limiting stopper.On said feedback rod, be provided with the adjustment screw.Between said adjustment screw and the valve body sealing nut is set.Between said adjustment seat and valve body, utilize the O-ring seals sealing.Said spring utilizes plug screw to be fixed in the spring seat.
On said valve pocket, be disposed radially first through hole, be respectively equipped with second through hole and groove, be provided with groove in the spool bottom at said spool middle part; Oil circuit UNICOM in said first through hole and second through hole and the valve body.Groove on the said spool cooperates with the tip-clearance of feedback rod.
Simple control structure of the present invention separates pilot valve with control mechanism, easy for installation, volume is little, and is in light weight, valve simple in structure.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the plan view of Fig. 1.
Embodiment
Below in conjunction with concrete accompanying drawing and embodiment the present invention is described further.
Like Fig. 1～shown in Figure 2: mechanical servo control valve comprises spool 1, valve pocket 2, valve body 3, adjustment seat 4, O-ring seals 5, feedback rod 6, sealing nut 7, operating stem 8, limiting stopper 9, adjustment screw 10, filler opening 11, oil outlet 12, second through hole 13, groove 14, groove 15, spring seat 16, spring 17, plug screw 18, first through hole 19 etc.
The present invention includes valve body 3, spool 1 is set in valve body 3, sheathed valve pocket 2 outside spool 1 at the upper end of spool 1 fixing operation bar 8, is provided with adjustment seat 4 between spool 1 and valve body 3, between adjustment seat 4 and operating stem 8, be provided with limiting stopper 9; Be respectively equipped with second through hole 13 and groove 14 at spool 1 middle part, be provided with groove 15 in spool 1 bottom; In the groove 14 of spool 1, be provided with spring seat 16, spring 17 is installed in spring seat 16, said spring 17 utilizes plug screw 18 to be fixed in the spring seat 16; At the radially installation feedback rod 6 of said valve pocket 2 upper edge spools 1, on feedback rod 6, be provided with adjustment screw 10; Between said adjustment screw 10 and the valve body 3 sealing nut 7 is set; Groove 15 on the said spool 1 cooperates with the tip-clearance of feedback rod 6; Between adjustment seat 4 and valve body 3, utilize O-ring seals 5 sealings; On valve body 3, be provided with filler opening 11 and oil outlet 12, in valve body 3, be provided with oil circuit; On valve pocket 2, be disposed radially first through hole 19, the oil circuit UNICOM in said first through hole 19 and second through hole 13 and the valve body 3.
Working procedure of the present invention: during rotary manipulation bar 8, can drive spool 1 spool 1 is rotated, thereby make second through hole 13 on the spool 1 connect oil circuit with first through hole, 19 contacts on the valve pocket 2; Hydraulic oil enters into variable cylinder by oil outlet 12; Change thereby promote swash plate angle and orientation, pump delivery and fluid direction are changed, variable cylinder drives feedback rod 6 simultaneously; Pass through lever principle; Promote valve pocket 2 and rotate, through hole and oil circuit on the valve pocket 2 are changeed at an angle, close oil circuit.In addition, when spool 1 changes, make angulation between groove 14 and the spring seat 16 of spool 1, the springs 17 in the spring seat 16 can drive spool 1 and reset.
Simple control structure of the present invention separates pilot valve with control mechanism, easy for installation, volume is little, and is in light weight, valve simple in structure.Increased the control base area, better tightness prevents when working long hours, to occur the leakage of oil problem.Adopt new material and advanced heat treatment method, improved spool, the wear resistance of valve pocket, efficient have had higher lifting.The O RunddichtringO adopts fluorine rubber, and high-low temperature resistant is difficult for wearing out, and has guaranteed the reliability of valve.
Claims (6)
1. a mechanical servo control valve comprises valve body (3), on valve body (3), is provided with filler opening (11) and oil outlet (12), in valve body (3), is provided with oil circuit and spool (1), and sheathed valve pocket (2) outside spool (1) is at the upper end fixing operation bar (8) of spool (1); It is characterized in that: at the radially installation feedback rod (6) of said valve pocket (2) upper edge spool (1); In the groove (14) of spool (1), be provided with spring seat (16), spring (17) is installed in spring seat (16);
Said spring (17) utilizes plug screw (18) to be fixed in the spring seat (16);
On said valve pocket (2), be disposed radially first through hole (19), be respectively equipped with second through hole (13) and groove (14), be provided with groove (15) in spool (1) bottom at said spool (1) middle part; Said first through hole (19) and second through hole (13) and the interior oil circuit UNICOM of valve body (3);
Groove (15) on the said spool (1) cooperates with the tip-clearance of feedback rod (6).
2. mechanical servo control valve as claimed in claim 1 is characterized in that: between said spool (1) and valve body (3), be provided with adjustment seat (4).
3. mechanical servo control valve as claimed in claim 2 is characterized in that: between said adjustment seat (4) and operating stem (8), be provided with limiting stopper (9).
4. mechanical servo control valve as claimed in claim 1 is characterized in that: on said feedback rod (6), be provided with adjustment screw (10).
5. mechanical servo control valve as claimed in claim 4 is characterized in that: between said adjustment screw (10) and the valve body (3) sealing nut (7) is set.
6. mechanical servo control valve as claimed in claim 2 is characterized in that: between said adjustment seat (4) and valve body (3), utilize O-ring seals (5) sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010223095 CN101871475B (en) | 2010-07-09 | 2010-07-09 | Mechanical servo control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010223095 CN101871475B (en) | 2010-07-09 | 2010-07-09 | Mechanical servo control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101871475A CN101871475A (en) | 2010-10-27 |
| CN101871475B true CN101871475B (en) | 2012-12-12 |
Family
ID=42996523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010223095 Active CN101871475B (en) | 2010-07-09 | 2010-07-09 | Mechanical servo control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101871475B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481950B (en) * | 2014-11-29 | 2017-03-22 | 南京萨伯工业设计研究院有限公司 | Servo valve sleeve and machining method thereof |
| CN104514763B (en) * | 2014-12-30 | 2017-01-18 | 南京萨伯工业设计研究院有限公司 | Improved servo control valve and control method thereof |
| CN104533869A (en) * | 2014-12-30 | 2015-04-22 | 南京萨伯工业设计研究院有限公司 | Fluid drive servo feedback mechanism and control method thereof |
| DE102016226039B3 (en) * | 2016-12-22 | 2018-02-08 | Danfoss Power Solutions Gmbh & Co. Ohg | DISPLACEMENT CONTROL ARRANGEMENT FOR AN AXIAL PISTON PUMP |
| CN107202047A (en) * | 2017-06-05 | 2017-09-26 | 中国北方车辆研究所 | A kind of conjuncted pump motor swash plate swinging angle control mechanism |
| CN109779995A (en) * | 2019-01-25 | 2019-05-21 | 鼎斯（上海）液压科技有限公司 | Hydraulic cartridge valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039288A (en) * | 1989-07-24 | 1990-01-31 | 权宇 | Composite control valve of pressure and flow proportional to electric current |
| DE4431128A1 (en) * | 1994-09-01 | 1996-03-07 | Bosch Gmbh Robert | Method of setting fuel-injection electromagnetic or solenoid valve |
| CN2253322Y (en) * | 1996-01-02 | 1997-04-30 | 柯文斌 | Brake control valve |
| DE19740352A1 (en) * | 1997-09-13 | 1999-03-18 | Zf Frledrichshafen Aktiengesel | Vehicle power steering valve with centering device |
| CN2625629Y (en) * | 2003-05-30 | 2004-07-14 | 华中科技大学 | Seawater hydraulic pressure flow control valve |
| CN2864266Y (en) * | 2005-11-02 | 2007-01-31 | 韦莉 | Constant flow control valve for high-pressure fluid |
-
2010
- 2010-07-09 CN CN 201010223095 patent/CN101871475B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039288A (en) * | 1989-07-24 | 1990-01-31 | 权宇 | Composite control valve of pressure and flow proportional to electric current |
| DE4431128A1 (en) * | 1994-09-01 | 1996-03-07 | Bosch Gmbh Robert | Method of setting fuel-injection electromagnetic or solenoid valve |
| CN2253322Y (en) * | 1996-01-02 | 1997-04-30 | 柯文斌 | Brake control valve |
| DE19740352A1 (en) * | 1997-09-13 | 1999-03-18 | Zf Frledrichshafen Aktiengesel | Vehicle power steering valve with centering device |
| CN2625629Y (en) * | 2003-05-30 | 2004-07-14 | 华中科技大学 | Seawater hydraulic pressure flow control valve |
| CN2864266Y (en) * | 2005-11-02 | 2007-01-31 | 韦莉 | Constant flow control valve for high-pressure fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101871475A (en) | 2010-10-27 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 202, Chengnan Road, Xinwu District, Wuxi City, Jiangsu Province, 214000 Patentee after: Wuxi Weifu Precision Machinery Manufacturing Co.,Ltd. Country or region after: China Address before: 214028, No. 202 Chengnan Road, Wangzhuang Industrial Supporting Zone, New District, Wuxi City, Jiangsu Province Patentee before: Wuxi Weifu Precision Machinery Manufacturing Co.,Ltd. Country or region before: China |