CN108167258A - Oil pressure balance formula servomotor guiding valve - Google Patents
Oil pressure balance formula servomotor guiding valve Download PDFInfo
- Publication number
- CN108167258A CN108167258A CN201810145879.7A CN201810145879A CN108167258A CN 108167258 A CN108167258 A CN 108167258A CN 201810145879 A CN201810145879 A CN 201810145879A CN 108167258 A CN108167258 A CN 108167258A
- Authority
- CN
- China
- Prior art keywords
- spool
- annular
- oil
- guiding valve
- oil pressure
- 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.)
- Withdrawn
Links
- 210000004907 gland Anatomy 0.000 claims abstract description 16
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
Abstract
The present invention provides a kind of oil pressure balance formula servomotor guiding valve, to solve the problems, such as be：How guiding valve is changed to oil pressure balance formula by spring and the oily balanced type of control.The method is characterized in that：It includes valve pocket, spool and its upper and lower spool shoulder, annular gland is sleeved on spool top, the annular chamber surrounded by annular gland, valve pocket, spool and its upper valve core shoulder is formed below annular gland, annular chamber and pressure oil communicate, and the annulus area of annular gland towards annular chamber is less than the area of bottom spool shoulder bottom surface.The positive effect of the present invention is：It not only avoids because of the spool bite problem of spring band, it is thus also avoided that select the spring band of adaptation is not easy problem；The reliability of system is significantly improved, and reduces cost.
Description
Technical field
The present invention relates to the guiding valves of control small steam turbine throttle aperture servomotor.
Background technology
Control small steam turbine throttle aperture, the hydraulic servo being usually made of servomotor, guiding valve and feedback
What mechanism realized, as shown in Figure 1, guiding valve therein 1 specifically has upper valve using spring and the oily balanced type of control on spool 19
The spool of more than 16 upper valve core shoulder is known as spool top 14 by core shoulder 16 and bottom spool shoulder 18, and the lower half portion of spring 12 is sleeved on
It behind spool top, is arranged between upper end cover 11 and upper valve core shoulder, applies downward elastic force to spool.Chamber and pressure where spring
Power oil phase leads to.18 bottom surface of bottom spool shoulder forms control oil pocket B with valve pocket 15, and oily pouring orifice is controlled to be located at the lower part of control oil pocket.
Its normality is that the control oil generated by mechanically or electrically liquid governor enters guiding valve control oil pocket, and control oil acts on bottom spool
18 bottom surface of shoulder generates spool upward thrust, which balances each other with above-mentioned downward elastic force, and spool is made to be in flat
Weighing apparatus position.When controlling oil pressure raising, upward thrust is caused to be more than elastic force, spool moves up, and guiding valve is opened, and makes pressure oil
Into 2 cavity of resorption 22 of servomotor, the oil return of servomotor epicoele 21 returns to guiding valve, and servomotor piston is pushed to move up, opens porthole
Greatly, by mechanically or electrically feeding back, the pressure of control oil is reduced, until same spring force balances, spool returns to equilbrium position, sliding
Valve is closed, and servomotor is made to be in a new equilbrium position；When oil pressure is controlled to reduce, the upward thrust in spool lower part is less than bullet
Spring force, spool move down, and guiding valve is opened, and pressure oil is made to enter servomotor epicoele, the oil of servomotor cavity of resorption by guiding valve oil return,
Servomotor piston is pushed to move down, turns down porthole, by mechanically or electrically feeding back, the pressure of raising control oil, Zhi Daotong
Spring dynamic balance, spool return to equilbrium position, and guiding valve is closed, and servomotor is made to be in a new equilbrium position.
It can be seen that it is very high to the requirement of spring in the guiding valve, on the one hand according to different size, the spool of different structure
With the control oil of different control pressures, need to select the spring of respective shapes, rigidity and size, the spring being adapted in this way is selected to be
It is very difficult；On the other hand as spool acts, spring force is changed linearly with displacement, and more its elastic force of compressed spring is bigger, and
The variation of control-oil pressure is fixed, and as spool moves up, spring force becomes larger, and spool amount of movement is pushed to become smaller, in this way
Spool bite is easily caused, reduces the reliability of guiding valve.
Invention content
In order to solve the above technical problems, the object of the present invention is to provide a kind of oil pressure balances using pressure oil substitution spring
Formula servomotor guiding valve.
The object of the present invention is achieved like this：It includes valve pocket, spool and its upper and lower spool shoulder, it is characterized in that：Annular
Gland is sleeved on spool top, and the ring surrounded by annular gland, valve pocket, spool and its upper valve core shoulder is formed below annular gland
Shape chamber, annular chamber and pressure oil communicate, and the annulus area of annular gland towards annular chamber is less than the area of bottom spool shoulder bottom surface.
Its normality is that the control oil generated by mechanically or electrically liquid governor enters guiding valve control oil pocket, controls oil effect
In bottom spool shoulder bottom surface, upward thrust is generated to spool, which balances each other with the oil pressure of annular chamber, make at spool
In equilbrium position.When controlling oil pressure raising, the oil pressure of oil pocket is controlled to be more than the oil pressure of annular chamber, spool moves up, guiding valve
It opens, pressure oil enters servomotor cavity of resorption, and the oil return of servomotor epicoele returns to guiding valve, servomotor piston is pushed to move up, is made
Porthole is opened greatly, by mechanically or electrically feeding back, reduces the pressure of control oil, until same annular chamber oil pressure balance, spool returns to flat
Weighing apparatus position, guiding valve are closed, and servomotor is made to be in a new equilbrium position.When oil pressure is controlled to reduce, the oil pressure of oil pocket is controlled
Less than the oil pressure of annular chamber, spool moves down, and guiding valve is opened, and pressure oil enters servomotor epicoele, the oil return of servomotor cavity of resorption
Guiding valve is returned to, servomotor piston is pushed to move down, turns down porthole, by mechanically or electrically feeding back, the pressure of raising control oil
Power, until same annular chamber oil pressure dynamic balance, spool returns to equilbrium position, and guiding valve is closed, and servomotor is made to be in a new balance
Position.
Compared with prior art, the positive effect of the present invention is：Since the oil pressure of annular chamber is constant, spool is acting
Upward thrust is fixed in the process, is not influenced by spool amount of movement；Secondly as eliminating spring, not only avoid
Because of the spool bite problem of spring band, it is thus also avoided that select the spring band of adaptation is not easy problem；Finally, it is pressed using annular
Lid replaces spring, simple in structure, not only significantly improves the reliability of system, and reduce cost.
Description of the drawings
It further illustrates the present invention below in conjunction with the accompanying drawings.
Fig. 1 is existing using spring and the schematic diagram of the oily balanced type servomotor guiding valve of control.
Fig. 2 is the schematic diagram of the present invention.
Fig. 3 is the C portions enlarged drawing of Fig. 2.
Specific embodiment
Referring to Fig. 2 and 3, it includes valve pocket 15, spool 19 and its upper valve core shoulder 16, bottom spool shoulder 18,13 sets of annular gland
On spool top 14, the annular chamber surrounded by annular gland, valve pocket, spool and its upper valve core shoulder is formed below annular gland
A, annular chamber and pressure oil communicate, and the annulus area of annular gland towards annular chamber is the half of bottom spool shoulder base area.
Its normality is that the control oil generated by mechanically or electrically liquid governor enters guiding valve control oil pocket, controls oil effect
In bottom spool shoulder bottom surface, upward thrust is generated to spool, which balances each other with annular chamber oil pressure, is in spool
Equilbrium position.When controlling oil pressure raising, the oil pressure of oil pocket is controlled to be more than the oil pressure of annular chamber, spool moves up, and guiding valve is beaten
It opens, pressure oil enters 2 cavity of resorption 22 of servomotor, and the oil return of servomotor epicoele 21 returns to guiding valve, servomotor piston is pushed to move up,
Porthole is made to open greatly, by mechanically or electrically feeding back, reduces the pressure of control oil, until same annular chamber oil pressure dynamic balance, spool returns
To equilbrium position, guiding valve is closed, and servomotor is made to be in a new equilbrium position.When oil pressure is controlled to reduce, oil pocket is controlled
Oil pressure is less than the oil pressure of annular chamber, and spool moves down, and guiding valve is opened, and pressure oil enters servomotor epicoele, servomotor cavity of resorption
Oil return returns to guiding valve, and servomotor piston is pushed to move down, turns down porthole, by mechanically or electrically feeding back, raising control oil
Pressure, until same annular chamber oil pressure balance, spool returns to equilbrium position, and guiding valve is closed, make servomotor be in one it is new flat
Weighing apparatus position.
Claims (2)
1. a kind of oil pressure balance formula servomotor guiding valve, it includes valve pocket, spool and its upper and lower spool shoulder, it is characterized in that：Annular pressure
Lid is sleeved on spool top, and the annular surrounded by annular gland, valve pocket, spool and its upper valve core shoulder is formed below annular gland
Chamber, annular chamber and pressure oil communicate, and the annulus area of annular gland towards annular chamber is less than the area of bottom spool shoulder bottom surface.
2. oil pressure balance formula servomotor guiding valve described in accordance with the claim 1, it is characterized in that：Annular gland is towards the ring of annular chamber
Shape area is the half of bottom spool shoulder base area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145879.7A CN108167258A (en) | 2018-02-12 | 2018-02-12 | Oil pressure balance formula servomotor guiding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145879.7A CN108167258A (en) | 2018-02-12 | 2018-02-12 | Oil pressure balance formula servomotor guiding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108167258A true CN108167258A (en) | 2018-06-15 |
Family
ID=62513922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810145879.7A Withdrawn CN108167258A (en) | 2018-02-12 | 2018-02-12 | Oil pressure balance formula servomotor guiding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679017A (en) * | 2018-07-12 | 2018-10-19 | 江苏新扬新材料股份有限公司 | Propeller governor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988530A (en) * | 2009-08-04 | 2011-03-23 | 沈阳东北电力调节技术有限公司 | Lever feedback electrohydraulic servo mechanism |
| CN103114879A (en) * | 2013-03-01 | 2013-05-22 | 辽宁电力控制技术有限公司 | Oil motivator in stream turbine adjusting system |
| CN204060822U (en) * | 2014-08-29 | 2014-12-31 | 杭州吉通机电有限公司 | A kind of Novel servo oil engine |
| CN208024648U (en) * | 2018-02-12 | 2018-10-30 | 沈阳东北电力调节技术有限公司 | Oil pressure balance formula servomotor guiding valve |
-
2018
- 2018-02-12 CN CN201810145879.7A patent/CN108167258A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988530A (en) * | 2009-08-04 | 2011-03-23 | 沈阳东北电力调节技术有限公司 | Lever feedback electrohydraulic servo mechanism |
| CN103114879A (en) * | 2013-03-01 | 2013-05-22 | 辽宁电力控制技术有限公司 | Oil motivator in stream turbine adjusting system |
| CN204060822U (en) * | 2014-08-29 | 2014-12-31 | 杭州吉通机电有限公司 | A kind of Novel servo oil engine |
| CN208024648U (en) * | 2018-02-12 | 2018-10-30 | 沈阳东北电力调节技术有限公司 | Oil pressure balance formula servomotor guiding valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679017A (en) * | 2018-07-12 | 2018-10-19 | 江苏新扬新材料股份有限公司 | Propeller governor |
| CN108679017B (en) * | 2018-07-12 | 2024-04-16 | 江苏新扬新材料股份有限公司 | Propeller speed regulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180615 |