CN102878334A - Flow-stabilizing controller - Google Patents
Flow-stabilizing controller Download PDFInfo
- Publication number
- CN102878334A CN102878334A CN2011101932902A CN201110193290A CN102878334A CN 102878334 A CN102878334 A CN 102878334A CN 2011101932902 A CN2011101932902 A CN 2011101932902A CN 201110193290 A CN201110193290 A CN 201110193290A CN 102878334 A CN102878334 A CN 102878334A
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- valve
- pressure
- spool
- flow
- stabilizing controller
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Abstract
A flow-stabilizing controller comprises a valve bush, wherein a valve core is arranged in the valve bush; the lower end of the valve bush is provided with an inlet; the upper end of the valve bush is provided with a transverse outlet; the valve core is provided with an inner hole which is provided with a spring; the lower end of the valve core is provided with an axial hole and a radial hole, wherein the axial hole is communicated with the inlet and the radial hole is communicated with the axial hole in a crossed manner. The flow-stabilizing controller provided by the invention is arranged on an oil inlet of a pilot valve body, so that the oil liquid entering the pilot valve body flows through the controller firstly, and then flows to other parts of the valve body. In the process, the flow-stabilizing controller stabilizes the pressure of the oil liquid flowing in a pilot opening, thereby stabilizing the pressure of an outlet of a main valve, so that the purposes of reducing the pressure fluctuation of the outlet of the main valve and improving the pressure-stabilizing precision are achieved.
Description
Technical field
The present invention relates to the hydraulic system technical field, the concrete current stabilizing controller that uses in a kind of hydraulic system that relates to.
Background technique
Common pilot pressure class valve is subjected to the impact of system load pressure easily, and neglecting under high the neglecting has fluctuation, and setting-pressure accuracy is not high, causes system's cisco unity malfunction.In order to pursue good usability, and select the high Proportional valve of pressure regulation precision, servovalve etc., can cause the system cost transition to increase.
Summary of the invention
Technical problem to be solved by this invention is, overcomes problems of the prior art, and a kind of current stabilizing controller for the hydraulic system steady pressure is provided.
Such in order to address the above problem technological scheme of the present invention:
Current stabilizing controller comprises a valve pocket, and valve pocket inside is provided with a spool, the valve pocket lower end is import, and the valve pocket upper end has a laterally outlet, and spool has an endoporus, endoporus is provided with spring, and the spool lower end has the axial bore of a connection import, and and the axial empty radial hole that communicates that intersects.
The spool outside has cutting, and spool cutting place also is equipped with an aperture that communicates with import.
Current stabilizing controller of the present invention is contained in guide valve blocks filler opening place, makes the fluid that enters guide valve blocks pass through first this controller, flows to other parts of valve body again.In this process, it is constant that current stabilizing controller is stablized the oil liquid pressure that flows to pilot port, thereby it is constant that the main valve outlet pressure is stablized, and plays the purpose that reduces the fluctuation of main valve outlet pressure and improve setting-pressure accuracy.
Beneficial effect, current stabilizing controller of the present invention, employing Type B hydraulic bridge simple in structure, cost is low, and utilizing has first guide valve blocks, makes internal structure more compact, but action effect is obvious, can prevent the fluctuation problem of outlet pressure, so can improve the setting-pressure accuracy of common pilot pressure class valve.From to a certain degree, also saved system cost, avoid using the high Proportional valve of price and servovalve.For demanding proportion pilot pressure class valve, also can use this structure, make the performance of valve more perfect.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structural representation of current stabilizing controller of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Common pilot pressure valve main spool spring stiffness K is not high, for the ripple disable of valve outlet port stability of flow, will consider how to make the pilot stage pressure stability constant.Because when system works, the pressure setting of valve no longer goes to change, so guide's pressure adjusting spring decrement fixes, and the power of output is definite value, and the pressure P of main valve will be seen the pressure of pilot stage.
By formula
(Cd-flow coefficient, A-valve port flow area, ρ-fluid density, pressure reduction before and after the Δ P-valve port) as can be known, when other parameters were definite value, pressure and flow were directly proportional, retrodict to such an extent that pressure will constantly will make constant flow, so we have designed the pilot flow controller.
Referring to Fig. 1, current stabilizing controller is followed the hydraulic bridge theorem, is the Type B hydraulic bridge.The Type B hydraulic bridge is input as the fixer resistance, is output as variable liquid resistance, from accompanying drawing as seen, is respectively hole L1 and hole L2.
The Type B hydraulic bridge is adopted in design, is because its technological requirement is lower, easy to process, and the reaction velocity appropriateness is convenient to control, and stability margin is larger, adopts this hydraulic bridge so consider.
Current stabilizing controller, structure mainly contain the compositions such as end cap 1, spring 2, valve pocket 3, spool 4, O shape circle 5 and valve seat 6.
Spool adopts the guiding valve form, and the one, end face processing is easily implemented, and it will get well with respect to the cone valve guidance quality, and is steadily mobile; The 2nd, can utilize the aperture on spool end and the valve pocket, the opening amount is adjusted.And in order to reduce the area of contact of spool and valve pocket, reduce valve pocket and spool are cooperated technological requirement, cutting L3 on spool, and the L4 that spiles thereon communicates with inlet pressure, and the equilibrium oil hydraulic coupling makes spool mobile steady in valve pocket; And bottom spool, make a call to a radial hole L5, the spool lifting surface area is increased, and can reduce noise.
The spring seat of both ends of the spring directly utilizes the endoporus in spool and the end cap to locate, and can reduce cost like this, simplifies structure, impel whole controller internal structure compacter, and positioning performance is also better, can prevent that spring is mobile in compression and reseting procedure.
Establish the pressure definite value when guide's inlet pressure is lower than, controller is inoperative.
When guide's inlet pressure is higher than setup pressure value, the break controller state of equilibrium.Spool overcomes spring force under the oil liquid pressure effect, move up, and the hole L2 aperture on the valve pocket is reduced, thereby the liquid resistance increases, and the pressure loss increases when causing by this hole, to reach the constant purpose of valve port front and back pressure reduction.Because area is certain, so last pilot flow is a constant value, irrelevant with the flow that flows to the main valve valve port.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. current stabilizing controller, comprise a valve pocket, valve pocket inside is provided with a spool, the valve pocket lower end is import, and the valve pocket upper end has a laterally outlet, it is characterized in that, spool has an endoporus, endoporus is provided with spring, and the spool lower end has the axial bore of a connection import, and and the axial empty radial hole that communicates that intersects.
2. current stabilizing controller according to claim 1 is characterized in that, the spool outside has cutting, and spool cutting place also is equipped with an aperture that communicates with import.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101932902A CN102878334A (en) | 2011-07-11 | 2011-07-11 | Flow-stabilizing controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101932902A CN102878334A (en) | 2011-07-11 | 2011-07-11 | Flow-stabilizing controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102878334A true CN102878334A (en) | 2013-01-16 |
Family
ID=47479780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101932902A Pending CN102878334A (en) | 2011-07-11 | 2011-07-11 | Flow-stabilizing controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102878334A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782153A (en) * | 2016-05-04 | 2016-07-20 | 宁波市加力特机械有限公司 | Pressure compensation valve of hydraulic pressure station of electric platform |
| CN108662222A (en) * | 2018-06-13 | 2018-10-16 | 上海立新液压有限公司 | A kind of pilot-operated type threeway proportional pressure-reducing valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529340A1 (en) * | 1985-08-16 | 1987-02-19 | Bosch Gmbh Robert | Flow regulating valve |
| CN1330608A (en) * | 1998-12-18 | 2002-01-09 | 岚瑟股份有限公司 | Premix dispensing valve with integral pressure regulation |
| CN1764798A (en) * | 2003-04-03 | 2006-04-26 | B.布朗医学公司 | Injection port valve |
| CN101469726A (en) * | 2007-12-29 | 2009-07-01 | 上海立新液压有限公司 | Stacked compression release valve |
| CN202140643U (en) * | 2011-07-11 | 2012-02-08 | 上海立新液压有限公司 | Current stabilizing controller |
-
2011
- 2011-07-11 CN CN2011101932902A patent/CN102878334A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529340A1 (en) * | 1985-08-16 | 1987-02-19 | Bosch Gmbh Robert | Flow regulating valve |
| CN1330608A (en) * | 1998-12-18 | 2002-01-09 | 岚瑟股份有限公司 | Premix dispensing valve with integral pressure regulation |
| CN1764798A (en) * | 2003-04-03 | 2006-04-26 | B.布朗医学公司 | Injection port valve |
| CN101469726A (en) * | 2007-12-29 | 2009-07-01 | 上海立新液压有限公司 | Stacked compression release valve |
| CN202140643U (en) * | 2011-07-11 | 2012-02-08 | 上海立新液压有限公司 | Current stabilizing controller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782153A (en) * | 2016-05-04 | 2016-07-20 | 宁波市加力特机械有限公司 | Pressure compensation valve of hydraulic pressure station of electric platform |
| CN108662222A (en) * | 2018-06-13 | 2018-10-16 | 上海立新液压有限公司 | A kind of pilot-operated type threeway proportional pressure-reducing valve |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130116 |