WO2004076898A1 - Direktgesteuertes druckbegrenzungsventil - Google Patents
Direktgesteuertes druckbegrenzungsventil Download PDFInfo
- Publication number
- WO2004076898A1 WO2004076898A1 PCT/DE2003/003783 DE0303783W WO2004076898A1 WO 2004076898 A1 WO2004076898 A1 WO 2004076898A1 DE 0303783 W DE0303783 W DE 0303783W WO 2004076898 A1 WO2004076898 A1 WO 2004076898A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat piston
- seat
- pressure relief
- relief valve
- valve according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
- F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7904—Reciprocating valves
- Y10T137/7922—Spring biased
- Y10T137/7925—Piston-type valves
Definitions
- the invention relates to a directly controlled pressure limiting valve in accordance with the • preamble of claim 1.
- FIG. 1 shows a DBV 2 with a seat piston 6 guided in a valve housing 4.
- the seat piston 6 is received in a longitudinal bore 8 and is biased via a spring 10 against a valve seat 12 to block a pressure medium connection from an inlet-side working connection A to an outlet-side working connection B.
- the seat piston 6 is arranged with radial play in the longitudinal bore 8. In a circumferential groove 38 of the
- the disadvantage of this solution is that the seat piston can perform rotational or tilting movements in the longitudinal direction in the open position around the sealing ring.
- the seat piston Due to the resulting flutter, the seat piston is subjected to high mechanical stresses, causing the
- the object of the present invention is to provide a directly controlled pressure relief valve that eliminates the aforementioned disadvantages and is inexpensive to manufacture.
- the pressure relief valve (DBV) according to the invention has a valve housing with an inlet and an outlet working connection.
- a seat piston is prestressed against a valve seat in the valve housing.
- the seat piston in the guide area is supported in the valve housing at least via two circumferential guide elements which are spaced apart from one another and are placed on the circumference of the seat piston.
- An advantage of the solution according to the invention is that the seat piston is guided in at least two "bearings" - the two guide elements - in a longitudinal bore of the valve housing, so that the seat piston cannot perform any rotational or tilting movements about its longitudinal axis and thus cannot when the DBV is open can be vibrated. Flutter is suppressed.
- Another advantage of the DBV according to the invention is that the two guide elements dampen the seat piston in the axial direction.
- the seat piston has no axial stop that axially limits an opening stroke of the seat piston.
- the maximum opening stroke is determined by the compression of the spring.
- the longitudinal bore is in the The mouth area to the spring chamber is expanded radially via a flat phase, so that the retracted guide element cannot be damaged when it is moved back.
- the guide elements are O-sealing rings, for example with a Shore hardness A in the range of 90.
- pressure medium can be guided through bores in the seat piston from the outlet-side working connection into the spring chamber, so that a pressure is present in this, which corresponds approximately to the pressure at the outlet-side working connection.
- a pressure is present in this, which corresponds approximately to the pressure at the outlet-side working connection.
- at least one transverse bore to the work connection on the outlet side is opened via a clearance or a cross-section, while its opening cross-section can be controlled depending on the opening stroke of the seat piston and thus a pressure medium flow through the transverse bore is no longer possible, but only via an annular gap can be done.
- the guide elements are spaced as far apart as possible, the first guide element preferably being arranged near the transverse bore and the second guide element near the mouth region of the longitudinal bore to the spring chamber.
- Another embodiment provides for a rotation of the seat piston between the guide elements to reduce hysteresis, so that no grinding of the seat piston can occur.
- a storage space in the form of a radial one on the outlet side Downgrading the seat piston with an annular end face.
- the storage space is axially limited by the valve seat and the ring end face. In the basic position, pressure medium can flow out of the storage space along the seat piston in the direction of the work connection on the outlet side.
- FIG. 1 shows a longitudinal section through a known solution of a pressure relief valve
- Figure 2 shows a longitudinal section through a preferred embodiment of the invention
- Figure 3 shows a longitudinal section through the seat piston according to the invention from Figure 2 and
- Figure 4 is an enlarged view of area X of Figure 2.
- FIG. 2 shows a sectional side view of a preferred embodiment of a directly controlled pressure relief valve (DBV) 2 according to the invention.
- the DBV 2 has a multi-part valve housing 4 with a longitudinal bore 8, in which a seat piston 6 is slidably received.
- the seat piston 6 is biased in its basic position against a valve seat 12 by a spring 10.
- the spring 10 is arranged in a spring chamber 14 and can be preloaded in an adjustable manner by means of a pretensioning device 16.
- the valve housing 4 has a spring chamber housing 18 and a seat piston housing 20.
- the spring chamber housing 18 delimits the spring chamber 14 for receiving the spring 10 and is connected to the seat piston housing 20 via a screw engagement.
- the spring 10 is supported with an end section 72 on a prestressing plate 60 of the prestressing device 16. With its second end section 62, it rests on a spring plate 24 of the seat piston 6.
- the biasing device 16 is arranged in the rear region of the spring chamber housing 18.
- the prestressing device 16 has a prestressing screw 64 which passes through the spring chamber housing 18 and acts on the back of the prestressing plate 60.
- a locking nut 66 with the preload screw 64 is in active engagement outside the spring chamber housing 18.
- the longitudinal bore 8 and an axial working connection A on the inlet side viewed from the valve seat 12 and a radial working connection B on the outlet side for connecting working lines (not shown) are formed.
- the longitudinal bore 8 is open to the axial working connection A.
- the longitudinal bore 8 is connected via a plurality of evenly distributed radial bores 22 in the form of a bore star.
- the valve seat 12 is formed in the seat piston housing 20 in the longitudinal bore 8.
- the longitudinal bore 8 is radially expanded in the direction of the spring chamber 16 over four stages 26, 28, 30, 32.
- the first stage 26 is between the two work connections A, B formed and used to form the valve seat 12.
- the second stage 28 is used in the pretensioned basic position of the seat piston 8 for receiving the spring plate 24 and the end portion 62 of the spring 10 acting on the rear side of the spring plate 18.
- the third and fourth stages 30, 32 serve to accommodate the spring chamber housing 18.
- the seat piston 6 is guided radially on the outlet side beyond the radial working connection B in its guide area via two circumferential guide elements 36 spaced apart from one another in the longitudinal bore 8.
- the guide elements 36 are O-sealing rings, which are each received in a circumferential groove 38 (FIG. 3) of the seat piston 6 and bear sealingly on opposite inner circumferential sections 40 of the longitudinal bore 8.
- the use of at least two spaced-apart guide elements 36 ensures that the seat piston 6 is guided in the longitudinal bore 8 during a stroke via two “bearings”, so that a rotation or tilting movement of the seat piston 6 is excluded or reduced to an acceptable level is and the seat piston 6 can not be set in vibration much more difficult.
- the greater the distance between the guide elements 36 the better the radial guidance of the seat piston 6.
- the guide elements 36 also perform an axially damping function.
- the material of the guide elements 36 is selected so that on the one hand an optimal support effect and damping is achieved, but on the other hand the frictional forces acting on the seat piston 6 via the guide elements 36 are minimal, so that the response behavior of the DBV 2 is optimized.
- the seat piston 6 is provided with a recess 42 between the guide elements 36 (FIG. 3).
- This recess 42 which is preferably formed centrally between the guide elements 36, increases a radial distance of the seat piston 6 in its outer peripheral region 76 between the guide elements 36 and an opposite inner peripheral region 70 of the longitudinal bore 8. This reduces the risk of the seat piston 6 tilting or rubbing, so that the hysteresis of the DBV 2 can be reduced.
- the seat piston 6 has no axial stop, which axially limits an opening stroke of the seat piston 6.
- the maximum opening stroke is determined by the compression of the spring 10.
- the longitudinal bore 8 in the mouth region to the spring chamber 14 is expanded radially via a flat phase 82. Furthermore, the flat phase 82 automatically centers the seat piston 6 in the longitudinal bore 8 when it moves back.
- the seat body 6 is in the form of a storage space 44 (FIG. 4) between the seat piston 6 and the seat piston housing 22
- the seat piston edge 46 and the radial bores 22 are advantageously located at a certain distance from the
- Valve seat 12 or from the axial working port A, so that an axial flow of the flowing pressure medium on
- a blind hole-like axial bore 54 (FIG. 3) is formed, which is open towards the spring chamber 14 and opens into at least one transverse bore 56 on the valve seat side.
- a pressure applied to the outlet-side working connection B can thus be tapped and is present in the spring chamber 14.
- the transverse bore is preferably designed as a bore star.
- the transverse bore 56 is opened towards the work connection B on the outlet side, while with increasing opening stroke its opening cross section towards the work connection B is controlled by a control edge 58 of the longitudinal bore 8 (FIG. 4).
- the control edge 58 is in the seat piston housing 20 like a segment of a circle through the Intersection areas of the radial bores 22 are formed with the longitudinal bore 8.
- the guide elements 36 are spaced as far apart as possible to improve the stabilization of the seat piston 6.
- a guide element 36 is preferably arranged near the transverse bore 56 and the other
- a directly controlled pressure relief valve with a seat piston in a longitudinal bore of a valve housing, which is guided radially in the longitudinal bore in its guide region via two circumferentially spaced guide elements.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Safety Valves (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50311620T DE50311620D1 (de) | 2003-02-26 | 2003-11-14 | Direktgesteuertes druckbegrenzungsventil |
US10/545,133 US20060151031A1 (en) | 2003-02-26 | 2003-11-14 | Directly controlled pressure control valve |
AT03785514T ATE434144T1 (de) | 2003-02-26 | 2003-11-14 | Direktgesteuertes druckbegrenzungsventil |
EP03785514A EP1597500B1 (de) | 2003-02-26 | 2003-11-14 | Direktgesteuertes druckbegrenzungsventil |
AU2003294624A AU2003294624A1 (en) | 2003-02-26 | 2003-11-14 | Directly controlled pressure control valve |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10308487.8 | 2003-02-26 | ||
DE10308487 | 2003-02-26 | ||
DE10312672A DE10312672A1 (de) | 2003-02-26 | 2003-03-21 | Direktgesteuertes Druckbegrenzungsventil |
DE10312672.4 | 2003-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004076898A1 true WO2004076898A1 (de) | 2004-09-10 |
Family
ID=32928844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003783 WO2004076898A1 (de) | 2003-02-26 | 2003-11-14 | Direktgesteuertes druckbegrenzungsventil |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060151031A1 (de) |
EP (1) | EP1597500B1 (de) |
AU (1) | AU2003294624A1 (de) |
WO (1) | WO2004076898A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN100344903C (zh) * | 2005-08-16 | 2007-10-24 | 浙江大学 | 一种油脂集中润滑系统的溢流阀 |
DE102007047902B4 (de) * | 2006-12-20 | 2011-08-25 | DENSO CORPORATION, Aichi-pref. | Kolbenventil |
Families Citing this family (7)
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EP2805054B1 (de) * | 2012-01-19 | 2017-11-08 | Flow International Corporation | Druckentlastungsventilvorrichtung und bauteile hiervon |
DE102012104286A1 (de) * | 2012-05-16 | 2013-11-21 | Voss Automotive Gmbh | Druckbegrenzungsventil |
JP5845214B2 (ja) * | 2013-07-16 | 2016-01-20 | 日立建機株式会社 | リリーフ弁 |
JP2016038089A (ja) * | 2014-08-12 | 2016-03-22 | 株式会社不二越 | ダイレクトリリーフバルブ |
DE102015208780A1 (de) * | 2015-05-12 | 2016-11-17 | Robert Bosch Gmbh | Druckbegrenzungsventil |
US11506289B2 (en) | 2016-02-17 | 2022-11-22 | Flow International Corporation | Regulator valve assembly and components thereof |
US10378500B2 (en) * | 2016-09-27 | 2019-08-13 | Caterpillar Inc. | Protection device for limiting pump cavitation in common rail system |
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- 2003-11-14 EP EP03785514A patent/EP1597500B1/de not_active Expired - Lifetime
- 2003-11-14 WO PCT/DE2003/003783 patent/WO2004076898A1/de not_active Application Discontinuation
- 2003-11-14 US US10/545,133 patent/US20060151031A1/en not_active Abandoned
- 2003-11-14 AU AU2003294624A patent/AU2003294624A1/en not_active Abandoned
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN100344903C (zh) * | 2005-08-16 | 2007-10-24 | 浙江大学 | 一种油脂集中润滑系统的溢流阀 |
DE102007047902B4 (de) * | 2006-12-20 | 2011-08-25 | DENSO CORPORATION, Aichi-pref. | Kolbenventil |
Also Published As
Publication number | Publication date |
---|---|
EP1597500B1 (de) | 2009-06-17 |
EP1597500A1 (de) | 2005-11-23 |
AU2003294624A1 (en) | 2004-09-17 |
US20060151031A1 (en) | 2006-07-13 |
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