CN2190211Y - Pressure control valve with a membrance - Google Patents
Pressure control valve with a membrance Download PDFInfo
- Publication number
- CN2190211Y CN2190211Y CN 94214819 CN94214819U CN2190211Y CN 2190211 Y CN2190211 Y CN 2190211Y CN 94214819 CN94214819 CN 94214819 CN 94214819 U CN94214819 U CN 94214819U CN 2190211 Y CN2190211 Y CN 2190211Y
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- pressure maintaining
- spool
- diaphragm
- 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.)
- Expired - Fee Related
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- Fluid-Driven Valves (AREA)
Abstract
The utility model relates to a pressure control valve with a membrane, comprising a valve body, a valve core, a valve seat, springs, and adjusting screws. The utility model is characterized in that an elastic membrane is installed in a membrane box at the upper part of the valve body, the elastic membrane is connected with the valve core through a transmission rod, and the fluid medium at the control side in the valve is communicated with the lower chamber of the membrane through a channel. Thereby, the controlled pressure directly acts on the elastic membrane, and the valve core is driven to move so that the opening degree of a throttling mouth is controlled. The valve is mainly used for oil lubricating system. The utility model has the advantages of sensitive and reliable operation and high control precision, and a constant pressure at the lubricated position can be obtained.
Description
The utility model relates to the fluid pressure maintaining valve, and particularly a kind of can control automatically to liquid measure and to the diaphragm type pressure maintaining valve of hydraulic coupling is applicable to the pressure fuel-flow control of lubricating oil path.
In the existing thin oil force-feed lubrication system, by oil pump lubricant oil is transported to rubbing surface, lubricating oil pressure generally is not higher than 0.8mpa, therefore should install the pressure maintaining valve of regulating pressure behind the oil pump pump, to control the pressure and the flow of oil.Usually the scavenger valve that adopts in the lubrication system comprises valve body, spool, valve seat, spring and adjusting screw etc., and its shortcoming is that energy loss is big, control accuracy is low, is difficult to guarantee that normal, the stable lubrication pressure in equipment lubrication position reaches to oil mass.Especially to the moving element of filmatic bearing one class, lubricating oil pressure, instability of flow can cause heating even combustion to be hindered.For solving this technical barrier, carried out relevant research work abroad very early, wherein piston type and pneumatic controlling type pressure maintaining valve have been used for producing.Though structure in the form of piston is simple, sensitivity is relatively poor, and control accuracy is low; Though pneumatic control formula precision can reach requirement, need join a cover pneumatic system in addition and make and be unfavorable for the structure bulky complex applying.
The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and provides a kind of simple and compact for structure, can accurately control the pressure maintaining valve of lubricating point charge oil pressure and fuel delivery.
Solution of the present utility model is: in the bellows on valve body top flexible sheet is set, forms Seal cage in the diaphragm bottom; Flexible sheet connects with spool by drive link; Controlled flowing medium on the pressure side communicates through the Seal cage of passage with the diaphragm bottom in the valve.
Because the pressure of valve control can be before the valve or behind the valve, this valve has two kinds of patterns, a kind of is the negative feedback valve, and promptly controlled pressure raises, and valve turns down.Another kind is the positive feedback effect valve, and promptly controlled pressure raises, valve is opened greatly.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of negative feedback pressure maintaining valve.
Among the figure, be provided with bellows 3 on valve body 1 top, bellows comprises loam cake 4 and lower cover 8 etc.Between the bellows upper and lower cover, be fixed with flexible sheet 6, because compacted sealing around the flexible sheet, so bellows is divided into upper and lower two chambers.In upper chamber adjusting screw 7, steel ball 4, spring 12 and top tray 5 etc. are arranged.The adjusting screw 7 at rotation top can change the elastic force of spring 12, thereby changes setting valve.The chamber forms Seal cage 16 under the diaphragm.Flexible sheet 6 connects mutually with drive link 13, and the drive link lower end then connects with spool 10.The throttling liquid supplying device of valve is made up of spool 10, valve pocket 11 and valve seat 9, and valve seat is on the top of spool, and spool increases or reduces along the move up and down open degree that can make valve of the relative valve seat of valve pocket, to guarantee good regulating effect.The restriction of pressure oil in valve enters the chamber, upper end 18 of valve among the figure, 15 charges into chamber under the diaphragm through the annular pass again.Like this pressure of valve export side be controlled pressure through passage 15 affact flexible sheet 6 below, when pressure is higher than the setting valve of spring, will push away on the diaphragm, the drive spool upwards, valve is turned down, the flow pressure of outlet side is descended, be stabilized in the numerical value of adjusting.Otherwise when the pressure of outlet side descended, spring pushed away under the diaphragm, and valve is left greatly, and the pressure of outlet side just rises to some extent.So, can guarantee that downstream pressure is constant.When the pressure of diaphragm bottom during less than setting valve, valve is often opened.
The pressure of controlling among the figure is downstream pressure, and controlled pressure raises, and valve turns down, so be the negative feedback pressure maintaining valve.The pressure of this valve control also can be upstream pressure, if the relative position of transposing spool and valve seat, promptly valve seat 9 and changes to flow to and then becomes the positive feedback effect pressure maintaining valve under spool 10, controlled pressure rising, and valve is opened greatly.
More than said flexible sheet 6 can be rubber membrane, elastic metallic diaphragm or metal bellows etc.
This diaphragm type pressure maintaining valve is mainly used in the pressure control of oil lubricating system and process lubrication system, also can be used for pressure adjustment and the control of other fluid such as not aggressive, non-inflammable and explosive property gas, liquid low-pressure system. This valve adopts diaphragm as actuated element, has greatly improved reaction sensitivity. The controlling organization of valve is simply compact, arranges ingeniously, does not substantially increase the volume of valve. This valve has extensive use in lubricating system and other gas, liquid system, can be used to the pressure at constant system feed flow position, the operating condition of systems stabilisation. This valve also has reliable in action, control accuracy height, pressure stability, the advantage such as convenient for installation and maintenance.
Claims (4)
1, diaphragm type pressure maintaining valve, comprise valve body (1), spool (10), valve seat (9), valve pocket (11), spring (12) and adjust screw (7), it is characterized in that in the bellows (3) on valve body (1) top, being provided with flexible sheet (6), form Seal cage (16) in the diaphragm bottom; Flexible sheet (6) connects by drive link (13) and spool (10); The flowing medium of valve inner control side communicates through the Seal cage (16) of passage (15) with diaphragm (6) bottom.
2, pressure maintaining valve as claimed in claim 1 is characterized in that said valve seat (9) on spool (10), constitutes the negative feedback pressure maintaining valve.
3, pressure maintaining valve as claimed in claim 1 is characterized in that said valve seat (9) under spool (10), constitutes the positive interaction pressure maintaining valve.
4,, it is characterized in that said flexible sheet (6) is rubber membrane, elastic metallic diaphragm or metal bellows as claim 1,2 or 3 described pressure maintaining valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214819 CN2190211Y (en) | 1994-06-10 | 1994-06-10 | Pressure control valve with a membrance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214819 CN2190211Y (en) | 1994-06-10 | 1994-06-10 | Pressure control valve with a membrance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2190211Y true CN2190211Y (en) | 1995-02-22 |
Family
ID=33830980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94214819 Expired - Fee Related CN2190211Y (en) | 1994-06-10 | 1994-06-10 | Pressure control valve with a membrance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2190211Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865315A (en) * | 2010-06-13 | 2010-10-20 | 上海井和海船用阀门有限公司 | Pressure maintaining valve |
| CN102182833A (en) * | 2011-05-25 | 2011-09-14 | 杨彦 | Flow control switch |
| CN103306982A (en) * | 2012-03-12 | 2013-09-18 | 上海斯可络压缩机有限公司 | Lubricating oil system of air compressor |
| CN104481852A (en) * | 2014-10-28 | 2015-04-01 | 上海空间推进研究所 | Compensation sylphon component and mounting method thereof |
| CN107269501A (en) * | 2017-08-10 | 2017-10-20 | 吴瑞昌 | A kind of water cut-off pump |
-
1994
- 1994-06-10 CN CN 94214819 patent/CN2190211Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865315A (en) * | 2010-06-13 | 2010-10-20 | 上海井和海船用阀门有限公司 | Pressure maintaining valve |
| CN102182833A (en) * | 2011-05-25 | 2011-09-14 | 杨彦 | Flow control switch |
| CN102182833B (en) * | 2011-05-25 | 2013-03-13 | 杨彦 | Flow control switch |
| CN103306982A (en) * | 2012-03-12 | 2013-09-18 | 上海斯可络压缩机有限公司 | Lubricating oil system of air compressor |
| CN104481852A (en) * | 2014-10-28 | 2015-04-01 | 上海空间推进研究所 | Compensation sylphon component and mounting method thereof |
| CN104481852B (en) * | 2014-10-28 | 2016-08-31 | 上海空间推进研究所 | A kind of compensation capsule stack and installation method thereof |
| CN107269501A (en) * | 2017-08-10 | 2017-10-20 | 吴瑞昌 | A kind of water cut-off pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |