CN208024648U - Oil pressure balance formula servomotor guiding valve - Google Patents
Oil pressure balance formula servomotor guiding valve Download PDFInfo
- Publication number
- CN208024648U CN208024648U CN201820252251.2U CN201820252251U CN208024648U CN 208024648 U CN208024648 U CN 208024648U CN 201820252251 U CN201820252251 U CN 201820252251U CN 208024648 U CN208024648 U CN 208024648U
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- spool
- annular
- oil
- guiding valve
- oil pressure
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Abstract
The utility model 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 main points of the utility model are：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 annular gland is less than the area of bottom spool shoulder bottom surface towards the annulus area of annular chamber.The good effect of the utility model is：Not only avoid the spool bite problem because of spring band, it is thus also avoided that select the spring band of adaptation is not easy problem；So that the reliability of system is significantly improved, and reduces cost.
Description
Technical field
The utility model is related to control the guiding valve of 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 16 or more 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
Behind spool top, it is arranged between upper end cover 11 and upper valve core shoulder, applies downward elastic force to spool.Chamber where spring and pressure
Power oil phase is logical.18 bottom surface of bottom spool shoulder forms control oil pocket B with valve pocket 15, controls the lower part that oily pouring orifice is located at control oil pocket.
Its normality is that the control oil generated by mechanically or electrically liquid governor enters guiding valve and controls 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 pressure oil is made
Into 2 cavity of resorption 22 of servomotor, the oil return of servomotor epicoele 21 returns to guiding valve, pushes servomotor piston to move up, porthole is made to open
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 controlling oil pressure reduction, 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,
It pushes servomotor piston to move down, porthole is made to turn down, by mechanically or electrically feeding back, increase the pressure of 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, the spring for selecting respective shapes, rigidity and size is needed, 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 pushes spool amount of movement to become smaller, in this way
Spool bite is easily caused, the reliability of guiding valve is reduced.
Invention content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of oil pressure replacing spring using pressure oil
Balanced type servomotor guiding valve.
What the purpose of this utility model was realized in：It includes valve pocket, spool and its upper and lower spool shoulder, it is characterized in that：
Annular gland is sleeved on spool top, is formed below annular gland and is surrounded by annular gland, valve pocket, spool and its upper valve core shoulder
Annular chamber, annular chamber and pressure oil communicates, and annular gland is less than the face of bottom spool shoulder bottom surface towards the annulus area of annular chamber
Product.
Its normality is that the control oil generated by mechanically or electrically liquid governor enters guiding valve and controls 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, makes at spool
In equilbrium position.When controlling oil pressure raising, the oil pressure for controlling oil pocket is more than the oil pressure of annular chamber, and 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, pushes servomotor piston to move up, make
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 controlling oil pressure reduction, 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, pushes servomotor piston to move down, porthole is made to turn down, by mechanically or electrically feeding back, increases the pressure of 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 good effect of the utility model is：Since the oil pressure of annular chamber is constant, spool exists
Upward thrust is fixed in action process, is not influenced by spool amount of movement；Secondly as eliminating spring, not only keep away
The spool bite problem because of spring band is exempted from, it is thus also avoided that select the spring band of adaptation is not easy problem；Finally, using ring
Shape gland replaces spring, simple in structure, not only significantly improves the reliability of system, and reduce cost.
Description of the drawings
The utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the existing schematic diagram using spring and the oily balanced type servomotor guiding valve of control.
Fig. 2 is the schematic diagram of the utility model.
Fig. 3 is the portions the C enlarged drawing of Fig. 2.
Specific implementation mode
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 and controls 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, and spool is made to be in
Equilbrium position.When controlling oil pressure raising, the oil pressure for controlling oil pocket is more than the oil pressure of annular chamber, and 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,
So that porthole is opened 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 controlling oil pressure reduction, 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, pushes servomotor piston to move down, porthole is made to turn down, and by mechanically or electrically feeding back, increases 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 annular gland is less than the area of bottom spool shoulder bottom surface towards the annulus area of annular chamber.
2. oil pressure balance formula servomotor guiding valve described in accordance with the claim 1, it is characterized in that：Ring of the annular gland towards annular chamber
Shape area is the half of bottom spool shoulder base area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820252251.2U CN208024648U (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 |
|---|---|---|---|
| CN201820252251.2U CN208024648U (en) | 2018-02-12 | 2018-02-12 | Oil pressure balance formula servomotor guiding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208024648U true CN208024648U (en) | 2018-10-30 |
Family
ID=63904951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820252251.2U Active CN208024648U (en) | 2018-02-12 | 2018-02-12 | Oil pressure balance formula servomotor guiding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208024648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167258A (en) * | 2018-02-12 | 2018-06-15 | 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 CN201820252251.2U patent/CN208024648U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167258A (en) * | 2018-02-12 | 2018-06-15 | 沈阳东北电力调节技术有限公司 | Oil pressure balance formula servomotor guiding valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SHENYANG NAISI CONTROL TECHNOLOGY CO.,LTD. Assignor: SHENYANG NORTHEAST ELECTRIC POWER CONTROL Co.,Ltd. Contract record no.: X2023210000146 Denomination of utility model: Oil pressure balanced hydraulic motor spool valve Granted publication date: 20181030 License type: Common License Record date: 20230927 |
|
| EE01 | Entry into force of recordation of patent licensing contract |