CN1355391A - Low-noise overflow valve with shaped flow channel - Google Patents
Low-noise overflow valve with shaped flow channel Download PDFInfo
- Publication number
- CN1355391A CN1355391A CN 01142673 CN01142673A CN1355391A CN 1355391 A CN1355391 A CN 1355391A CN 01142673 CN01142673 CN 01142673 CN 01142673 A CN01142673 A CN 01142673A CN 1355391 A CN1355391 A CN 1355391A
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- valve
- main valve
- low
- flow channel
- guide
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- 239000000945 filler Substances 0.000 claims description 3
- 230000008685 targeting Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 241001364096 Pachycephalidae Species 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
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Abstract
A low-noise overflow valve with shaped flow channel is composed of main valve body, main valve sleeve with 6-8 radial micropores near the oil outlet, main valve core with ring groove near the oil inlet and recess on central guide part, damper, main valve spring, guide valve body, guiding valve seat, guide valve core, the guide valve is a conic valve with guiding cylindrical piston at its end part. Its advantage is very low noise caused by air cavities and vibration of valve core.
Description
Technical field
The present invention relates to a kind of low-noise overflow valve with shaped flow channel.
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 invention provides a kind of to the main valve flow channel shape change and suppress the low-noise overflow valve with shaped flow channel of the side direction runout of guide valve core.
Low-noise overflow valve with shaped flow channel 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 invention.
Embodiment
Low-noise overflow valve with shaped flow channel 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 overflow valve with shaped flow channel, 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 overflow valve with shaped flow channel 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 overflow valve with shaped flow channel 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 01142673 CN1355391A (en) | 2001-12-13 | 2001-12-13 | Low-noise overflow valve with shaped flow channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142673 CN1355391A (en) | 2001-12-13 | 2001-12-13 | Low-noise overflow valve with shaped flow channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1355391A true CN1355391A (en) | 2002-06-26 |
Family
ID=4676903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01142673 Pending CN1355391A (en) | 2001-12-13 | 2001-12-13 | Low-noise overflow valve with shaped flow channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1355391A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032372A (en) * | 2010-12-20 | 2011-04-27 | 福田雷沃国际重工股份有限公司 | Pressure relief and noise reduction safety valve |
| CN103277545A (en) * | 2013-06-04 | 2013-09-04 | 浙江大学 | Low-noise overflow valve |
| CN103470561A (en) * | 2013-09-03 | 2013-12-25 | 浙江大学 | Proportional overflow valve |
| CN103573735A (en) * | 2013-11-14 | 2014-02-12 | 浙江大学 | Pilot large-flow load control valve using displacement and force feedback principle |
-
2001
- 2001-12-13 CN CN 01142673 patent/CN1355391A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032372A (en) * | 2010-12-20 | 2011-04-27 | 福田雷沃国际重工股份有限公司 | Pressure relief and noise reduction safety valve |
| CN103277545A (en) * | 2013-06-04 | 2013-09-04 | 浙江大学 | Low-noise overflow valve |
| CN103277545B (en) * | 2013-06-04 | 2015-04-29 | 浙江大学 | Low-noise overflow valve |
| CN103470561A (en) * | 2013-09-03 | 2013-12-25 | 浙江大学 | Proportional overflow valve |
| CN103470561B (en) * | 2013-09-03 | 2015-10-21 | 浙江大学 | A kind of proportional pressure control valve |
| CN103573735A (en) * | 2013-11-14 | 2014-02-12 | 浙江大学 | Pilot large-flow load control valve using displacement and force feedback principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |