GB2037947A - Quiet operating valves for fluids - Google Patents

Quiet operating valves for fluids Download PDF

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Publication number
GB2037947A
GB2037947A GB7938395A GB7938395A GB2037947A GB 2037947 A GB2037947 A GB 2037947A GB 7938395 A GB7938395 A GB 7938395A GB 7938395 A GB7938395 A GB 7938395A GB 2037947 A GB2037947 A GB 2037947A
Authority
GB
United Kingdom
Prior art keywords
valve
valve seat
seat
housing
plate
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.)
Granted
Application number
GB7938395A
Other versions
GB2037947B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of GB2037947A publication Critical patent/GB2037947A/en
Application granted granted Critical
Publication of GB2037947B publication Critical patent/GB2037947B/en
Expired legal-status Critical Current

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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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1032—Spring-actuated disc valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1087—Valve seats
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Safety Valves (AREA)
  • Details Of Valves (AREA)
  • Compressor (AREA)

Abstract

An annular valve seat 5 is supported on a shoulder 16 of a housing 1. A space is provided below that part of the seat 5 which sealingly engages a valve plate 4. Annular spring action of the seat 5 reduces noise on opening or closing the valve. The valve is suitable as head or foot valve for a piston pump. In an alternative construction the seat 5 is undercut to provide the space and rests on the housing 1 through a shoulder 17 projecting down from the periphery of the seat 5. <IMAGE>

Description

SPECIFICATION Valves for controlling fluid flow The invention concerns valves for controlling fluid flow which are suitable in particular as head valves for piston pumps.
A valve according to the invention comprises a housing, an annular valve seat supported on a shoulder in the housing, and a spring-loaded valve plate, a space being provided below that part of the seat which sealingly engages the plate.
Valves of this design may be fitted to piston pumps (axial or radial piston pumps), as head valves or even as foot valves, and to other fast operating valves. When fitted as head valves, they serve as a seal between a piston chamber and a pressure chamber to which the pressure fluid is delivered by a piston actuated by a prime mover.
Piston pumps generate a considerable amount of noise particularly if they run at a fast rate and are operated over a range of high pressures.
Protection against noise is becoming increasingly more important, and piston pumps have become a problem in this respect. The fast opening and closing of the valve produces most of the noise. In particular, noise is generated by the fast closing of the valve, due to the operating pressure and the valve spring. The valve seat is not unlike an anvil acted upon by the valve like a hammer. The sound waves created are transmitted to the pump housing which acts like a resonator.
The provision of a space below the valve seat according to the invention enables the valve to generate less noise as the valve seat acts like an annular spring. The valve seat is not supported below the sealing surface, but nearer the outside by the housing. This has the effect of preventing the sound created by the valve knocking against the valve seat from spreading to the pump housing and causing it to vibrate without being cushioned in the process. The hammering noise created by the fast closing of the valve is cushioned by the valve seat before it is transferred to the pump housing. This simple construction has the effect of achieving a considerable reduction in pump noise as well as being efficient and cheap.
This is of particular advantage on a central hydraulic pump, where great importance is attached to as little difference as possible between the noise at through-flow pressure, at operating pressure, and when starting up with cold oil.
In one embodiment of the invention, the sealing surface between the seat and the plate may be annular with the valve seat resting on a shoulder of a bore in the housing, the diameter of the bore below the valve seat being larger than the diameter of the sealing surface. Advantageously, annular grooves are provided in the surface of the valve seat, resting on the housing. In this way, a labyrinth seal is created which improves the sealing properties of the valve and reduces its sensitivity to unevennesses and foreign particles.
A guide ring may be provided for positioning the valve plate and seat. This leads to a simplification in the assembly of the valve. The valve seat is simply placed in position without the need for pressing it home. The ring also guides the valve plate during opening and closing. It is of advantage if the guide ring, if present, and the valve seat are held in their respective positions by a sealing screw threaded in the housing.
DRAWINGS Figure 1 is a longitudinal section through a valve according to the invention; and Figure 2 is a partial cut-out of another valve seat according to the invention.
With particular reference to Figure 1, the valve is a head valve of a piston pump and incorporated in a pump housing 1. It is connected to a piston chamber (not shown) via a bore 2 and to a pressure chamber (not shown) via a bore 3. The valve has a valve plate 4 and a valve seat 5. A bore 1 5 in the housing 1 accommodates the valve seat 5 in such a way that only the outer area of seat 5 rests on a shoulder 1 6 of the bore 1 5. On its upper side, the valve plate 4 is equipped with a spring 6 which is supported in a bore 7 of a sealing screw 8.
This sealing screw 8 is screwed into the pump housing 1, using an intermediate sealing ring 9.
The top of the valve seat 5 is provided with a ring-shaped projection 10 with an obtuse wedgeshaped tip 11. The sealing surface of the valve is thus formed betweeen the valve plate 4 and tip 11. Alternatively, instead of valve seat 5, valve plate 4 may be provided with a ring-shaped projection with obtuse wedge-shaped tip or with a torus. On its underside, the valve seat 5 is equipped with grooves 12 which have a sealing effect. Situated between sealing screw 8 and valve seat 5 is a guide ring 13, which is equipped with bores 14 as passage for the pressure medium. This has the effect of ensuring safe positioning of the valve. The guide ring 13 also ensures safe guiding of the valve plate 4.
A reduction in noise is achieved by the annular spring design of valve seat 5 and the diameter relationship between the sealing surface 11 and the bore 1 5. It suffices if the "deflection" of valve seat 5 is no more than a few thousandths of a millimetre.
As illustrated in Figure 2, the space required for the deflection is alternatively achieved by shaping the valve seat 5. The valve seat 5 is supported on an annular shoulder 1 7 in the housing 1 and suitably undercut. As in Figure 1, the annular shoulder 1 7 may have grooves on its underside to act as a labyrinth seal.
1. A valve for controlling fluid flow comprising a housing, an annular valve seat supported on a shoulder in the housing, and a spring-loaded valve plate, a space being provided below that part of the seat which sealingly engages the plate.
2. A valve according to claim 1 in which the diameter of the housing below the seat is greater than the diameter of the sealing surface between the seat and the plate.
3. A valve according to claim 1 in which the valve seat is provided with an annular shoulder
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Valves for controlling fluid flow The invention concerns valves for controlling fluid flow which are suitable in particular as head valves for piston pumps. A valve according to the invention comprises a housing, an annular valve seat supported on a shoulder in the housing, and a spring-loaded valve plate, a space being provided below that part of the seat which sealingly engages the plate. Valves of this design may be fitted to piston pumps (axial or radial piston pumps), as head valves or even as foot valves, and to other fast operating valves. When fitted as head valves, they serve as a seal between a piston chamber and a pressure chamber to which the pressure fluid is delivered by a piston actuated by a prime mover. Piston pumps generate a considerable amount of noise particularly if they run at a fast rate and are operated over a range of high pressures. Protection against noise is becoming increasingly more important, and piston pumps have become a problem in this respect. The fast opening and closing of the valve produces most of the noise. In particular, noise is generated by the fast closing of the valve, due to the operating pressure and the valve spring. The valve seat is not unlike an anvil acted upon by the valve like a hammer. The sound waves created are transmitted to the pump housing which acts like a resonator. The provision of a space below the valve seat according to the invention enables the valve to generate less noise as the valve seat acts like an annular spring. The valve seat is not supported below the sealing surface, but nearer the outside by the housing. This has the effect of preventing the sound created by the valve knocking against the valve seat from spreading to the pump housing and causing it to vibrate without being cushioned in the process. The hammering noise created by the fast closing of the valve is cushioned by the valve seat before it is transferred to the pump housing. This simple construction has the effect of achieving a considerable reduction in pump noise as well as being efficient and cheap. This is of particular advantage on a central hydraulic pump, where great importance is attached to as little difference as possible between the noise at through-flow pressure, at operating pressure, and when starting up with cold oil. In one embodiment of the invention, the sealing surface between the seat and the plate may be annular with the valve seat resting on a shoulder of a bore in the housing, the diameter of the bore below the valve seat being larger than the diameter of the sealing surface. Advantageously, annular grooves are provided in the surface of the valve seat, resting on the housing. In this way, a labyrinth seal is created which improves the sealing properties of the valve and reduces its sensitivity to unevennesses and foreign particles. A guide ring may be provided for positioning the valve plate and seat. This leads to a simplification in the assembly of the valve. The valve seat is simply placed in position without the need for pressing it home. The ring also guides the valve plate during opening and closing. It is of advantage if the guide ring, if present, and the valve seat are held in their respective positions by a sealing screw threaded in the housing. DRAWINGS Figure 1 is a longitudinal section through a valve according to the invention; and Figure 2 is a partial cut-out of another valve seat according to the invention. With particular reference to Figure 1, the valve is a head valve of a piston pump and incorporated in a pump housing 1. It is connected to a piston chamber (not shown) via a bore 2 and to a pressure chamber (not shown) via a bore 3. The valve has a valve plate 4 and a valve seat 5. A bore 1 5 in the housing 1 accommodates the valve seat 5 in such a way that only the outer area of seat 5 rests on a shoulder 1 6 of the bore 1 5. On its upper side, the valve plate 4 is equipped with a spring 6 which is supported in a bore 7 of a sealing screw 8. This sealing screw 8 is screwed into the pump housing 1, using an intermediate sealing ring 9. The top of the valve seat 5 is provided with a ring-shaped projection 10 with an obtuse wedgeshaped tip 11. The sealing surface of the valve is thus formed betweeen the valve plate 4 and tip 11. Alternatively, instead of valve seat 5, valve plate 4 may be provided with a ring-shaped projection with obtuse wedge-shaped tip or with a torus. On its underside, the valve seat 5 is equipped with grooves 12 which have a sealing effect. Situated between sealing screw 8 and valve seat 5 is a guide ring 13, which is equipped with bores 14 as passage for the pressure medium. This has the effect of ensuring safe positioning of the valve. The guide ring 13 also ensures safe guiding of the valve plate 4. A reduction in noise is achieved by the annular spring design of valve seat 5 and the diameter relationship between the sealing surface 11 and the bore 1 5. It suffices if the "deflection" of valve seat 5 is no more than a few thousandths of a millimetre. As illustrated in Figure 2, the space required for the deflection is alternatively achieved by shaping the valve seat 5. The valve seat 5 is supported on an annular shoulder 1 7 in the housing 1 and suitably undercut. As in Figure 1, the annular shoulder 1 7 may have grooves on its underside to act as a labyrinth seal. CLAIMS
1. A valve for controlling fluid flow comprising a housing, an annular valve seat supported on a shoulder in the housing, and a spring-loaded valve plate, a space being provided below that part of the seat which sealingly engages the plate.
2. A valve according to claim 1 in which the diameter of the housing below the seat is greater than the diameter of the sealing surface between the seat and the plate.
3. A valve according to claim 1 in which the valve seat is provided with an annular shoulder projecting downwards from the periphery.
4. A valve according to any preceding claim in which annular grooves are provided in the surface of the valve seat resting on the housing.
5. A valve according to any preceding claim in which a guide ring is provided for positioning the valve plate and seat.
6. A valve according to any preceding claim in which the valve seat and guide ring, if present, are held in position by a screws threaded in the housing.
7. A valve for controlling fluid flow as herein described with reference to Figure 1 or to Figure 1 as modified by Figure 2 of the drawings.
GB7938395A 1978-12-07 1979-11-06 Quiet operating valves for fluids Expired GB2037947B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2852882A DE2852882B2 (en) 1978-12-07 1978-12-07 Valve, in particular pressure valve for a piston pump

Publications (2)

Publication Number Publication Date
GB2037947A true GB2037947A (en) 1980-07-16
GB2037947B GB2037947B (en) 1983-01-06

Family

ID=6056535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7938395A Expired GB2037947B (en) 1978-12-07 1979-11-06 Quiet operating valves for fluids

Country Status (7)

Country Link
JP (1) JPS5578183A (en)
BR (1) BR7907752A (en)
DE (1) DE2852882B2 (en)
ES (1) ES253468Y (en)
FR (1) FR2443631B1 (en)
GB (1) GB2037947B (en)
IT (1) IT1126137B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201229A (en) * 1987-02-12 1988-08-24 Scandot System Ab Valve assembly for a liquid jet printer
US4768932A (en) * 1986-07-25 1988-09-06 Geberth John Daniel Jun Hydraulic paint pump
WO2001004527A3 (en) * 1999-07-09 2001-07-12 Deka Products Lp Simplified piezoelectric valve
WO2011003769A1 (en) * 2009-07-08 2011-01-13 Robert Bosch Gmbh Valve
US9222587B2 (en) 2012-05-09 2015-12-29 Cummins Ip, Inc. Oil pressure regulator
CN106989008A (en) * 2017-04-19 2017-07-28 宁波合力机泵股份有限公司 A kind of groove type safety valve
CN108869761A (en) * 2018-09-17 2018-11-23 东莞市奥垦汽车泵业有限公司 A kind of mute improvement control valve of oil pump
CN110425331A (en) * 2015-12-24 2019-11-08 株式会社鹭宫制作所 Motor-driven valve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547362B1 (en) * 1983-06-09 1985-07-26 Citroen Sa MONOCYLINDRICAL OR MULTICYLINDRICAL RADIAL PUMP
GB2144181B (en) * 1983-07-27 1986-09-10 Dowty Fuel Syst Ltd Gas compressors
US5064169A (en) * 1990-03-30 1991-11-12 Keystone International Holdings Corp. Shock absorbing means for flow control devices
DE10048689B4 (en) * 2000-09-30 2006-06-08 Danfoss A/S radiator valve
CN102996432A (en) * 2012-10-31 2013-03-27 镇江宝城注浆设备有限公司 Horizontal one-way valve for grouting

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1719572A (en) * 1928-01-23 1929-07-02 Stoll Albert Valve construction for compressors and refrigerating pumps
CH428605A (en) * 1965-08-09 1967-01-15 A Sutter Fa Valve for spray nozzle
US3412931A (en) * 1966-10-18 1968-11-26 Palmer Pumps Ltd Valved cylinder heads
US3536092A (en) * 1967-11-13 1970-10-27 Air Prod & Chem Valve seat insert for gas handling equipment
JPS4910102B1 (en) * 1969-05-13 1974-03-08
BE755445A (en) * 1969-09-04 1971-02-01 Gerdts Gustav F Kg CHECK VALVE
JPS4730967U (en) * 1971-05-01 1972-12-07
JPS517506A (en) * 1974-07-08 1976-01-21 Morinaga Milk Industry Co Ltd Nenchona ekitaino kanketsutekijutenhohooyobi sochi

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768932A (en) * 1986-07-25 1988-09-06 Geberth John Daniel Jun Hydraulic paint pump
GB2201229A (en) * 1987-02-12 1988-08-24 Scandot System Ab Valve assembly for a liquid jet printer
GB2201229B (en) * 1987-02-12 1991-04-24 Scandot System Ab Arrangements for a valve assembly for a liquid jet printer
WO2001004527A3 (en) * 1999-07-09 2001-07-12 Deka Products Lp Simplified piezoelectric valve
CN102472396B (en) * 2009-07-08 2013-12-04 罗伯特·博世有限公司 Valve
CN102472396A (en) * 2009-07-08 2012-05-23 罗伯特·博世有限公司 Valve
WO2011003769A1 (en) * 2009-07-08 2011-01-13 Robert Bosch Gmbh Valve
US9222587B2 (en) 2012-05-09 2015-12-29 Cummins Ip, Inc. Oil pressure regulator
CN110425331A (en) * 2015-12-24 2019-11-08 株式会社鹭宫制作所 Motor-driven valve
CN110425331B (en) * 2015-12-24 2022-06-10 株式会社鹭宫制作所 Electric valve
CN106989008A (en) * 2017-04-19 2017-07-28 宁波合力机泵股份有限公司 A kind of groove type safety valve
CN106989008B (en) * 2017-04-19 2019-11-26 宁波合力机泵股份有限公司 A kind of groove type safety valve
CN108869761A (en) * 2018-09-17 2018-11-23 东莞市奥垦汽车泵业有限公司 A kind of mute improvement control valve of oil pump
CN108869761B (en) * 2018-09-17 2024-03-15 东莞珀力伟动力科技有限公司 Mute improved control valve of oil pump

Also Published As

Publication number Publication date
DE2852882A1 (en) 1980-06-12
FR2443631B1 (en) 1986-04-18
GB2037947B (en) 1983-01-06
ES253468U (en) 1980-12-16
ES253468Y (en) 1981-06-01
IT1126137B (en) 1986-05-14
FR2443631A1 (en) 1980-07-04
DE2852882B2 (en) 1981-03-12
BR7907752A (en) 1980-07-22
JPS5578183A (en) 1980-06-12
IT7946899A0 (en) 1979-12-04

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee