CN100485239C - Middle high pressure directly-acting hydraulic overflow valve - Google Patents
Middle high pressure directly-acting hydraulic overflow valve Download PDFInfo
- Publication number
- CN100485239C CN100485239C CNB200410013050XA CN200410013050A CN100485239C CN 100485239 C CN100485239 C CN 100485239C CN B200410013050X A CNB200410013050X A CN B200410013050XA CN 200410013050 A CN200410013050 A CN 200410013050A CN 100485239 C CN100485239 C CN 100485239C
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- valve
- spool
- valve seat
- damping
- cavity
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000013016 damping Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910000792 Monel Inorganic materials 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 4
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 4
- 238000004881 precipitation hardening Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 239000013505 freshwater Substances 0.000 description 5
- 239000013535 sea water Substances 0.000 description 5
- 230000010287 polarization Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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- Safety Valves (AREA)
- Details Of Valves (AREA)
Abstract
The present invention relats to pressure control element in hydraulic system and belongs to the field of valve. The present invention includes valve seat, valve core, damping rod, damping sleeve, valve sleeve, pressure regulating spring, spring seat, end cap and regulating screw. The valve core is one cavity; the damping rod and the damping sleeve have their inner holes form fitting interval and damping cavity; the valve seat and the valve core form one conic valve structure; and the valve core has small holes in its shoulder and tail end forming guide surface to the inner hole of the valve sleeve. The present invention is suitable for use as pressure controlling valve in high and medium pressure hydraulic system with water-based work medium. Compared with similar overflow valves, the present invention has the advantages of less leakage, high cavitation erosion resistance, less vibration, low noise and stable work performance.
Description
Technical field
The present invention relates to the pressure control valve in a kind of water hydraulic system, valve kind, be applicable to in seawater, fresh water, the high mesohigh water hydraulic system that makes the work medium such as water base as pressure controlled valve.
Background technique
Relief valve is a pressure control valve commonly used in the hydraulic system, can be used as level pressure relief valve or safety valve, and traditional relief valve adopts hydraulic oil to make the work medium more.When relief valve adopts water (water base) medium when (comprising seawater, fresh water or high water base etc.), the cavitation erosion problem is outstanding than the oil pressure relief valve.This is because the pressure for vaporization of water is much higher than mineral oil, when water during in the valve port flow at high speed, the flow field local compression can be lower than the pressure for vaporization of water, and air pocket and cavitation phenomenon will take place, make valve port place material be subjected to cavitation erosion, thereby reduce the functional reliability and the life-span of valve.The working pressure of relief valve is high more, and air pocket and cavitation phenomenon are serious more.
Another key technology difficult problem that water hydraulic relief valve exists is vibration, noise and working stability problem.Except the reason of air pockets erosion, the reason of generation is multiple in addition: 1) because the viscosity of water is low, viscous damping is little; 2) density of water, Young's modulus are big than mineral oil, and " water attack " phenomenon is serious; 3) medium goes out stream and spring force and departs from the radial force that reason such as spool axle center produces and make the spool polarization in that valve port is inhomogeneous.In addition, because the viscosity of water is low, the leakage problem at valve port place is more serious.
Fig. 3 is direct-acting type water hydraulic relief valve (the Trostmann E..Water Hydraulics Control Technology.Marcel Dekker that Denmark Danfoss company produces, Inc., New York, 1996), this valve has improved the working stability of valve to a certain extent by in the spool rear end damping cavity being set.But spool is easy to polarization, and consequent vibration, noise and working stability problem still exist.The material that this valve adopted can not be used seawater in addition, only is applicable to fresh water or the high not strong medium of corrosivity such as water base.
Summary of the invention
The invention provides a kind of middle and high straightening dynamic formula water hydraulic relief valve, be used to solve the above-mentioned technical barrier that direct-acting overflow valve exists, depress work middle and high, reduce valve port leakage, cavitation erosion, vibration, noise, improve the working stability of valve, be applicable to the strong low viscosity media of corrosivity such as seawater simultaneously.
A kind of middle and high straightening dynamic formula water hydraulic relief valve of the present invention, be included in valve seat 1, spool 2, damper rod 3, damping cover 4, pressure adjusting spring 5, spring seat 6, end cap 8 and the adjusting screw rod 7 arranged successively in the valve body 9, spool 2 is a cavity, damper rod 3 by the different cylindrical body of the diameter of axially-aligned constitute, wherein two sections cylndrical surface form matching gap with damping cover 4 corresponding endoporus respectively, the cavity formation damping cavity 10 between two matching gaps; It is characterized in that valve seat 1, spool 2, damper rod 3, damping cover 4 place in the valve pocket 11, the valve port place that valve seat 1 and spool 2 form is a cone valve structure, the cone angle of spool 2 ends is slightly larger than the cone angle of valve seat 1 endoporus oral area, spool 2 shoulders evenly have aperture, and the endoporus of the cylndrical surface of spool tail end and valve pocket 11 forms guide surface.
Described middle and high straightening dynamic formula water hydraulic relief valve, it is further characterized in that: damper rod 3 transmits pressure adjusting spring power with spool 2 cavity endoporus contact matching, and the contacting point of damper rod end and spool is a sphere.
Described middle and high straightening dynamic formula water hydraulic relief valve, when relief valve was worked under elevated pressures, it was two-stage throttle orifice structure that the cone angle of valve seat 1 endoporus oral area can have ring-shaped step, valve seat and spool formation valve port.
Described middle and high straightening dynamic formula water hydraulic relief valve, it is characterized in that: valve seat and spool adopt soft-hard material pairing, valve seat can adopt lower titanium alloy of hardness or monel or Austenitic Stainless Steel directly to process, and spool can adopt through the Martensitic Stain Less Steel of enhancement process or Precipitation-hardening Stainless Steel.
The technical solution used in the present invention is leaked in order to reduce, and spool 2 adopts the cone valve structure of good airproof performance.For reducing the spool polarization, in the design of spool tail end the guide cylinder face is arranged, and form matching gap with valve pocket 11 endoporus, provide guiding to valve core movement.In order to improve the working stability of spool, the damper rod 3 that is provided with in the spool rear end forms matching gap respectively and between the damping cover 4 corresponding endoporus for the large and small cylndrical surface on T shape cylindrical body, the damper rod, and the cavity between two matching gaps forms damping cavity 10, and the variation in pressure when utilizing valve core movement in the damping cavity increases the kinetic damping of spool.In order to make the spring force stepless action on spool, will be designed to spheric structure with the contacting point of spool on the damper rod.
Be the harm that alleviates air pocket and reduce to cavitate, taked following measures: 1) spool and valve seat all are designed to cone structure at the valve port place, and the spool cone angle is slightly larger than the valve seat cone angle, help suppressing air pocket; 2) valve seat and spool adopt soft-hard material pairing, valve seat can adopt lower titanium alloy of hardness or monel (as Mone1 etc.) or Austenitic Stainless Steel (as 1Cr18Ni9Ti) directly to process, spool can adopt Martensitic Stain Less Steel (being only applicable to fresh water or high water base) or the Precipitation-hardening Stainless Steel through enhancement process, helps the destruction that reduces to cavitate; 3) single-stage throttle orifice shown in Figure 1 can change two-stage throttle orifice shown in Figure 2 into, more helps reducing cavitation erosion.
This relief valve be applicable to in seawater, fresh water, the high mesohigh water hydraulic system that makes the work medium such as water base as pressure controlled valve.Compare with similar overflow, leak little, cavitation resistive property good, vibration is little, noise is low, good operating stability.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention.
Fig. 2 is that valve seat and spool formation valve port are a kind of enforcement state of two-stage throttle orifice structure.
Fig. 3 is a Danfoss direct-acting type water hydraulic relief valve structural representation.
Label among the above-mentioned figure is: valve seat 1, spool 2, damper rod 3, damping cover 4, pressure adjusting spring 5, spring seat 6, adjusting screw rod 7, end cap 8, valve body 9, damping cavity 10, valve pocket 11, pogo barrel 12.
Embodiment
As shown in Figure 1, an embodiment of the present invention comprises: valve seat 1, spool 2, damper rod 3, damping cover 4, pressure adjusting spring 5, spring seat 6, adjusting screw rod 7, end cap 8, valve body 9, valve pocket 11 etc.Spool is a cone valve structure.The spool tail end is provided with the guide cylinder face, and forms matching gap with valve body inner bore, provides guiding to valve core movement.Be provided with damper rod in the spool rear end, the large and small cylndrical surface on the damper rod respectively and damping overlap between the corresponding endoporus and form matching gap, and the cavity between two matching gaps forms damping cavity 10.Contacting point with spool on the damper rod is a spheric structure.During assembling, valve seat 1 is pressed on the valve body 9 endoporus left sides by valve pocket 11, and valve pocket 11 and damping cover 4 is pressed in the valve body by end cap 8.
High pressure water enters from the P mouth, and during working pressure that the hydraulic coupling on acting on spool is set greater than pressure adjusting spring, spool is opened, after water flows out through valve port, reach the spool back cavity by equally distributed aperture on the spool, the inclined hole that puts through overdamping enters spring chamber again, after the outflow of O mouth.Spool is in a certain equilibrium position under the operation of hydraulic coupling, spring force, frictional force.The pressure of P mouth can be set by the pre compressed magnitude that changes pressure adjusting spring.Spool is in the dynamic adjustments process, polarization when the guide surface on the spool can suppress the spool unlatching, the variation of damping cavity 10 volumes simultaneously will cause the variation in pressure in this chamber, thereby produce an additional forces opposite with the valve core movement direction, increase the damping of valve core movement, improved the working stability of spool.
Fig. 2 is that valve seat and spool form the another kind enforcement state that valve port is a two-stage throttle orifice structure, and when relief valve was worked under elevated pressures, it was two-stage throttle orifice structure that the cone angle of valve seat 1 endoporus oral area has ring-shaped step, valve seat and spool formation valve port.
Claims (5)
1, a kind of middle and high straightening dynamic formula water hydraulic relief valve, be included in valve seat [1], spool [2], damper rod [3], damping cover [4], pressure adjusting spring [5], spring seat [6], end cap [8] and the adjusting screw rod [7] arranged successively in the valve body [9], spool [2] is a cavity, damper rod [3] by the different cylindrical body of the diameter of axially-aligned constitute, wherein two sections cylndrical surface form matching gap with the corresponding endoporus of damping cover [4] respectively, the cavity formation damping cavity [10] between two matching gaps; It is characterized in that valve seat [1], spool [2], damper rod [3], damping cover [4] place in the valve pocket [11], the valve port place that valve seat [1] and spool [2] form is a cone valve structure, the cone angle of spool [2] end is slightly larger than the cone angle of valve seat [1] endoporus oral area, spool [2] shoulder evenly has aperture, and the endoporus of the cylndrical surface of spool tail end and valve pocket [11] forms guide surface.
2, middle and high straightening dynamic formula water hydraulic relief valve as claimed in claim 1 is characterized in that: damper rod [3] transmits pressure adjusting spring power with spool [2] cavity endoporus contact matching, and the contacting point of damper rod end and spool is a sphere.
3, middle and high straightening dynamic formula water hydraulic relief valve as claimed in claim 1 or 2, it is characterized in that: when relief valve was worked under elevated pressures, it was two-stage throttle orifice structure that the cone angle of valve seat [1] endoporus oral area has ring-shaped step, valve seat and spool formation valve port.
4, middle and high straightening dynamic formula water hydraulic relief valve as claimed in claim 1 or 2, it is characterized in that: valve seat and spool adopt soft-hard material pairing, valve seat adopts lower titanium alloy of hardness or monel or Austenitic Stainless Steel directly to process, and spool adopts Martensitic Stain Less Steel or the Precipitation-hardening Stainless Steel through enhancement process.
5, middle and high straightening dynamic formula water hydraulic relief valve as claimed in claim 3, it is characterized in that: valve seat and spool adopt soft-hard material pairing, valve seat adopts lower titanium alloy of hardness or monel or Austenitic Stainless Steel directly to process, and spool adopts Martensitic Stain Less Steel or the Precipitation-hardening Stainless Steel through enhancement process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410013050XA CN100485239C (en) | 2004-04-16 | 2004-04-16 | Middle high pressure directly-acting hydraulic overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410013050XA CN100485239C (en) | 2004-04-16 | 2004-04-16 | Middle high pressure directly-acting hydraulic overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563764A CN1563764A (en) | 2005-01-12 |
| CN100485239C true CN100485239C (en) | 2009-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410013050XA Expired - Lifetime CN100485239C (en) | 2004-04-16 | 2004-04-16 | Middle high pressure directly-acting hydraulic overflow valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN100485239C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839359B (en) * | 2009-11-18 | 2012-01-11 | 南京工程学院 | Variable-difference relief valve |
| CN101985990B (en) * | 2010-08-26 | 2014-04-16 | 京东大型阀门有限公司 | Metal bidirectional sealing valve cavity safety relief device |
| CN102042432B (en) * | 2010-12-10 | 2012-05-23 | 北京工业大学 | Direct-acting water pressure overflow valve with damping piston |
| US8807159B2 (en) | 2011-04-27 | 2014-08-19 | GM Global Technology Operations LLC | Corrosion-resistant armature and valve for anti-lock brake systems |
| CN102537444B (en) * | 2011-05-11 | 2013-07-17 | 上海大学 | Miniature front pressure-reducing valve type ultrahigh pressure overflow valve |
| CN102537439B (en) * | 2012-02-06 | 2014-07-16 | 派克汉尼汾动力传动产品（无锡）有限公司 | Pressure reducing valve structure and method for adjusting gas pressure |
| CN102678985A (en) * | 2012-05-04 | 2012-09-19 | 华中科技大学 | Seawater pressure balancing valve |
| DE102013108349A1 (en) * | 2013-07-22 | 2015-01-22 | Linde Hydraulics Gmbh & Co. Kg | Release valve for a hydrostatic drive system |
| CN104019258B (en) * | 2014-06-26 | 2016-08-17 | 华中科技大学无锡研究院 | A kind of double damping One-stage Water Hydraulic Relief Valve |
| CN108131345B (en) * | 2017-12-21 | 2019-12-03 | 北京市捷瑞特弹性阻尼体技术研究中心 | A kind of high-damping direct-acting overflow valve |
| CN108252975B (en) * | 2018-01-23 | 2019-09-20 | 江苏柯伊诺阀门有限公司 | Two-way secondary pressure rotary buffering valve |
| CN111089094B (en) * | 2019-12-25 | 2022-05-13 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pressure release valve with adjusting device capable of suppressing squeaking |
| CN114278771A (en) * | 2020-09-28 | 2022-04-05 | 江苏二马液压元件有限公司 | Area-variable direct-acting overflow valve |
-
2004
- 2004-04-16 CN CNB200410013050XA patent/CN100485239C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1563764A (en) | 2005-01-12 |
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Effective date of registration: 20170427 Address after: 430205 Hubei city of Wuhan province East Lake high technology development zone Zhongbo Industrial Park Road six Patentee after: WUHAN JUWEITIAN DIGITAL MACHINERY MANUFACTURING Co.,Ltd. Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 1037 Patentee before: Huazhong University of Science and Technology |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090506 |