CN2524033Y - Low noise leading overflow valve - Google Patents
Low noise leading overflow valve Download PDFInfo
- Publication number
- CN2524033Y CN2524033Y CN 01274250 CN01274250U CN2524033Y CN 2524033 Y CN2524033 Y CN 2524033Y CN 01274250 CN01274250 CN 01274250 CN 01274250 U CN01274250 U CN 01274250U CN 2524033 Y CN2524033 Y CN 2524033Y
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- China
- Prior art keywords
- valve
- main valve
- main
- noise
- valve core
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- 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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Abstract
The utility model relates to a low noise leading overflow valve, comprising a main valve, a valve casing, a damper, a main valve core, a spring for main valve, a pilot valve body, a pilot valve seat, a pilot valve core and a press adjusting spring. 6 to 8 downward radial small holes are excavated near the oil discharging port in the same circle with the main valve casing; a loop slot is excavated near the oil feeding at the front end of the main valve core; and the central leading part of the main valve core is provided with a groove. The pivot valve core is cone valve with column pivot piston at the end. With the improvement of the shape of the main valve channel and the sounding principle of the swirling air pocket, the utility model can effectively reduce the noise of the air pocket; meanwhile, the proper increasing oil scavenging drag force in the valve cavity and the control of the side vibration of he valve core can remarkably reduce the noise of the overflow valve, and the noise is much lower than that of other overflow valve with same specification.
Description
Technical field
The utility model relates to a kind of low noise pilot operated compound relief valve.
Background technique
Pilot operated compound relief valve is a most widely used and most typical hydraulic control component in the hydraulic system, and relief valve keeps the system pressure approximately constant by the unnecessary flow of system is overflowed back fuel tank.When fluid is flowed through valve port, because pressure reduction is very big, flow velocity is very high, the static pressure at restriction place sharply descends, and when static pressure was lower than the air separation pressure, the air that dissolves in the oil was separated in a large number with bubble form, Here it is cavitation, when bubble moved to the downstream pressure recovery district with fluid, bubble was crumbled and fall, and sent very big noise.Simultaneously, the unstability of spool side direction runout and pilot valve can cause self oscillations, brings out the high frequency whistler.
Existing pilot operated compound relief valve is reducing on its noise, mainly is by adjusting the damping hole size, change the valve core movement damping, improving its stability, thereby reduce its noise.Since from flow field microcosmic angle further investigation flow, the relation of air pocket and noise and vibration, the theoretical direction that lacks the Design of Low Noise criterion, further reduce the noise of relief valve, never have big progress, some practical structure are improved and are existed certain blindness.
Summary of the invention
The utility model provide a kind of to the main valve flow channel shape change and suppress the low noise pilot operated compound relief valve of the side direction runout of guide valve core.
The low noise pilot operated compound relief valve comprises main valve body, main valve housing, and main valve plug, damper, main spool spring, the pilot valve body, guide valve seat, guide valve core, pressure adjusting spring is having 6～8 radial holes that are directed downwards near on the same circumference of main valve housing of oil outlet.
Have circular groove near filler opening main valve plug front end, the middle part targeting part of main valve plug has groove.
Guide valve core is the cone valve that the end has cylindrical guide piston.
Utilize the optimization and the whirlpool air pocket sounding principle of main valve flow channel shape, reduce Cavitation Noise effectively.By suitably increasing the oil return resistance and suppressing spool side direction runout, make the relief valve of the noise ratio same size of this relief valve that obvious reduction be arranged simultaneously.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
The low noise pilot operated compound relief valve comprises main valve body 1, main valve housing, main valve plug, damper 4,6,7,9, main spool spring 5, pilot valve body 8, guide valve seat 10, guide valve core, pressure adjusting spring 12 is having 6～8 radial holes that are directed downwards near on the main valve housing 2 same circumference of oil outlet.
Have circular groove near filler opening main valve plug 3 front ends, the middle part targeting part of main valve plug 3 has groove.
When hydraulic system pressure reached relief valve set pressure, valve port was opened overflow, because pressure difference is very big, when valve outlet port place static pressure is lower than fluid air separation pressure, the air that dissolves in the fluid is separated out in a large number with bubble form, and these bubbles can be crumbled and fall in the downstream pressure recovery district, bring out very strong noise.
Utilize the main valve inner flow passage structure of optimizing can change the flow field static pressure significantly and distribute and the air pocket form, great changes have taken place for noise characteristic.Main valve plug has the circular groove relief valve, the downstream pressure recovery district is communicated with the valve outlet port low pressure area, improved the static pressure of valve outlet port, formed a stable Maelstrom in the valve pocket simultaneously, Maelstrom is assembled isolated bubble becomes bigger bubble, has reduced that bubble is sharply vanished and the Cavitation Noise of bringing out.Whirlpool itself also consumes a part of fluid dynamic energy, makes the fluid section kinetic energy dissipation be heat, and this is useful to reducing hydrodynamic noise.And the caused side direction runout of valve core movement guidance quality difference also is a main cause of relief valve noise, this has structurally also been given improvement, and guide valve core employing end has the cone valve of cylindrical guide piston, the length of thread engagement of lengthening main valve plug and valve pocket.
Claims (3)
1. low noise pilot operated compound relief valve, comprise main valve body [1], main valve housing, main valve plug, damper [4], [6], [7], [9], main spool spring [5], pilot valve body [8], guide valve seat [10], guide valve core, pressure adjusting spring [12] is characterized in that: having 6～8 radial holes that are directed downwards near on the same circumference of main valve housing [2] of oil outlet.
2. low noise pilot operated compound relief valve according to claim 1 is characterized in that: have circular groove near filler opening main valve plug [3] front end, the middle part targeting part of main valve plug [3] has groove.
3. low noise pilot operated compound relief valve according to claim 1 and 2 is characterized in that: guide valve core [11] is the cone valve that the end has cylindrical guide piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274250 CN2524033Y (en) | 2001-12-13 | 2001-12-13 | Low noise leading overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274250 CN2524033Y (en) | 2001-12-13 | 2001-12-13 | Low noise leading overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2524033Y true CN2524033Y (en) | 2002-12-04 |
Family
ID=33678947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01274250 Expired - Fee Related CN2524033Y (en) | 2001-12-13 | 2001-12-13 | Low noise leading overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2524033Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251998A (en) * | 2011-06-28 | 2011-11-23 | 句容市天龙机械制造厂 | Pilot overflow valve |
| CN102536941A (en) * | 2012-01-16 | 2012-07-04 | 浙江师范大学 | Overflow-valve device for reversing mechanism in drilling equipment |
| CN103403422A (en) * | 2010-12-07 | 2013-11-20 | 诺格伦有限公司 | Relief valve |
| GB2525331B (en) * | 2010-09-19 | 2016-03-23 | Euntae Park | Fluid discharge device |
| CN105605275A (en) * | 2016-04-01 | 2016-05-25 | 成都科盛石油科技有限公司 | Natural gas pressure reduction mechanism |
| CN107725845A (en) * | 2017-10-27 | 2018-02-23 | 四川森洁燃气设备有限公司 | A kind of decompression type regulating valve of high pressure relief device |
| CN107829845A (en) * | 2017-10-27 | 2018-03-23 | 四川森洁燃气设备有限公司 | A kind of automobile fuel gas spray track supply amount adjustment method |
| CN107939555A (en) * | 2017-10-27 | 2018-04-20 | 四川森洁燃气设备有限公司 | A kind of supply amount adjusting apparatus of automobile fuel gas spray rail |
| CN108167459A (en) * | 2017-12-11 | 2018-06-15 | 浙江大学 | A kind of voltage stabilizing pin structure for being used to compensate in-flow inserted valve closing direction hydraulic power |
| CN110230615A (en) * | 2019-04-29 | 2019-09-13 | 裕泰液压技术(上海)有限公司 | A kind of plug-in delay overflow valve |
-
2001
- 2001-12-13 CN CN 01274250 patent/CN2524033Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2525331B (en) * | 2010-09-19 | 2016-03-23 | Euntae Park | Fluid discharge device |
| CN103403422A (en) * | 2010-12-07 | 2013-11-20 | 诺格伦有限公司 | Relief valve |
| CN103403422B (en) * | 2010-12-07 | 2015-06-24 | 诺格伦有限公司 | Relief valve |
| CN102251998A (en) * | 2011-06-28 | 2011-11-23 | 句容市天龙机械制造厂 | Pilot overflow valve |
| CN102251998B (en) * | 2011-06-28 | 2013-12-11 | 句容市天龙机械制造厂 | Pilot overflow valve |
| CN102536941A (en) * | 2012-01-16 | 2012-07-04 | 浙江师范大学 | Overflow-valve device for reversing mechanism in drilling equipment |
| CN105605275A (en) * | 2016-04-01 | 2016-05-25 | 成都科盛石油科技有限公司 | Natural gas pressure reduction mechanism |
| CN107725845A (en) * | 2017-10-27 | 2018-02-23 | 四川森洁燃气设备有限公司 | A kind of decompression type regulating valve of high pressure relief device |
| CN107829845A (en) * | 2017-10-27 | 2018-03-23 | 四川森洁燃气设备有限公司 | A kind of automobile fuel gas spray track supply amount adjustment method |
| CN107939555A (en) * | 2017-10-27 | 2018-04-20 | 四川森洁燃气设备有限公司 | A kind of supply amount adjusting apparatus of automobile fuel gas spray rail |
| CN108167459A (en) * | 2017-12-11 | 2018-06-15 | 浙江大学 | A kind of voltage stabilizing pin structure for being used to compensate in-flow inserted valve closing direction hydraulic power |
| CN110230615A (en) * | 2019-04-29 | 2019-09-13 | 裕泰液压技术(上海)有限公司 | A kind of plug-in delay overflow valve |
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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 |