GB2568337A - Check Valve - Google Patents

Check Valve Download PDF

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Publication number
GB2568337A
GB2568337A GB1807547.3A GB201807547A GB2568337A GB 2568337 A GB2568337 A GB 2568337A GB 201807547 A GB201807547 A GB 201807547A GB 2568337 A GB2568337 A GB 2568337A
Authority
GB
United Kingdom
Prior art keywords
check valve
swing check
valve body
valve
compliant seal
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.)
Withdrawn
Application number
GB1807547.3A
Other versions
GB201807547D0 (en
Inventor
Pradip Dhotre Ravindra
Vinod Walle Vismay
R Anand
PANKAJ Shireesh
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.)
Eaton Intelligent Power Ltd
Original Assignee
Eaton Intelligent Power Ltd
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 Eaton Intelligent Power Ltd filed Critical Eaton Intelligent Power Ltd
Publication of GB201807547D0 publication Critical patent/GB201807547D0/en
Publication of GB2568337A publication Critical patent/GB2568337A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00—Arrangements in connection with fuel supply for power plant
    • B64D37/32—Safety measures not otherwise provided for, e.g. preventing explosive conditions
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00—Arrangements in connection with fuel supply for power plant
    • B64D37/005—Accessories not provided for in the groups B64D37/02 - B64D37/28
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22—Fuel supply systems
    • F02C7/232—Fuel valves; Draining valves or systems
    • 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
    • F16K1/16—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 with pivoted closure-members
    • F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2042—Special features or arrangements of the sealing
    • 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
    • F16K1/16—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 with pivoted closure-members
    • F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2042—Special features or arrangements of the sealing
    • F16K1/205—Special features or arrangements of the sealing the sealing being arranged on the valve member
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/40—Weight reduction
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Abstract

A swing check valve 20 suitable for use in an aircraft fuel system, such as a fuel pump, has a valve body 30, a hinge member 40, and a compliant seal member 50; the body and the seal are formed in a multi-material injection moulding process (MMM). The seal may be co-moulded over an annular recess formed between two spaced apart projections 33, 34 on a body sealing face 32, which faces a valve seat in use, the seal extending around a peripheral portion of the body. The hinge member may be formed from a metal, such as aluminium, and attached to the body by an intermediate snap fit connector (fig.2B,60). The body may be polyether ether ketone (PEEK).

Description

CHECKVALVE
FIELD OF THE INVENTION
The present invention relates to a check valve. Such valves may be used in aircraft fuel systems and may for example be associated with a fuel pump.
BACKGROUND
Swing check valves are used in aircraft fuel systems. A swing check valve may be associated with the or each fuel pump of the fuel system. The primary function is to allow fuel vapour to be transferred out of the interior of the pump - for example, the check valve may be arranged to allow fuel vapour to be transferred from the inside of the pump into the fuel tank. The check valve should be arranged to allow fuel vapour to flow through the valve in a first direction and check the flow of fuel in the opposite direction.
A typical swing check valve 1 is shown in figure 1. The check valve 1 comprises a body 10 pivotally mounted on a hinge or trunion 5 such that the body may move between a first position in which the sealing face of the body 10 is on the valve seat and blocks reverse flow through the aperture 15 and a second position in which the body pivots and lifts clear of the valve seat to allow forward flow trough the aperture.
Existing swing check valves are formed typically formed from aluminium and include a number of separate components. The valve body generally carries a synthetic rubber seal to prevent leakages. Typically, as shown in figure 1 the valve body 10 may comprise a closure member 12 and a support member 11 sandwiched between which is a rubber seal member 13. The rubber seal member 13 providing a compliant seal face for engaging the seat of the seal in use.
It is would be beneficial to provide an improved swing check valve having a simplified construction without comprising the reliable function of the valve.
SUMMARY OF INVENTION
According to a first aspect of the invention, there is provided a swing check valve for an aircraft fuel system, the valve comprising:
a valve body a hinge member and a compliant seal member, wherein the valve body and compliant seal member are formed in a multi-material injection moulding process.
The injection moulding process may be a co-moulding process.
In some embodiments, the compliant seal member is over moulded onto a portion of the valve body. The valve body may have a sealing face which, in use, faces the valve seat. The compliant seal member may be over moulded on at least a portion of the sealing face.
The compliant seal member may extend around a peripheral portion of the valve body. The compliant seal member may extend circumferentially around the full periphery of the valve body. For example, the compliant seal member may be generally annular.
The compliant seal member may, for example, be moulded in, or over, a seal feature formed on the valve body. For example the compliant seal member may be moulded over a generally annular seal feature. The seal feature may extend around the periphery of the valve body. The seal feature may for example comprise a recess (typically an annular recess) formed in the face of the valve body. The recess may for example be formed between two spaced apart (for example radially spaced apart) projections, which may define a recess therebetween.
The hinge member may be a metal component. The hinge member may be connected to the valve body. In some embodiments the connection may be a permanent connection, for example the valve body may be bonded or comoulded to the valve body. In other embodiments the body and the hinge member may be removably connected, for example by an intermediate connecting member. This may advantageously allow the valve body to be replaced (for example for repair). The valve body may be connected to the hinge by a snap fit connector.
The valve body may be formed from an injection moulded plastic material (for example a thermoplastic polymer). The valve body may for example comprise polyether ether ketone (PEEK).
In a further aspect of the present invention, there is provided an aircraft fuel pump comprising a swing check valve according to an embodiment of the invention.
While the invention has been described above, it extends to any inventive combination set out above, or in the following description or drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figures la, b and c show a sectional side view of a prior art swing check valve;
Figures 2a to c show three dimensional views of a swing check valve in accordance with a first embodiment of the invention;
Figure 3 shows a first connection member for use in the swing check valve of figure 2;
Figure 4, shows a second connection member for use in the swing check valve of figure 2;
Figure 5 shows a three dimensional view of a swing check valve in accordance with a second embodiment of the invention.
A swing check valve 20 in accordance with a first embodiment of the invention is shown in figure 2. The swing check valve 20 comprises a valve body 30 having associated therewith a hinge member 40. The hinge member 40 allows the valve 20 to be pivotally mounted in use within the flow path of a fuel vapour passage in an aircraft fuel pump assembly.
The valve body 30 is generally disk shaped and formed from injection moulded PEEK. The seal face 32 of the valve body is provided with a compliant seal member 50 formed from synthetic rubber for sealingly engaging a seal seat in use. The valve body 30 and compliant seal 50 are formed in twostep comoulding process (which may for example be a 2k moulding process).
The seal face 32 is provided with a pair of radially spaced apart circumferential projections 33, 34 which extend around the full periphery of the valve body. The compliant seal 50 is comoulded into the annular recess defined between the projections 33, 34.
The hinge member 40 is aluminium to provide a robust connection. The hinge member 40 includes an arm portion 42 which extends generally radially relative to the disk of the valve body 30 and a pivot portion 44 at a periphery of the valve body 30. The valve body 30 is provided with at least one aperture 35, for example a single central aperture as shown, for an intermediate connecting member for connecting the hinge member 40 and the valve body 30.
The intermediate connecting member 60 may comprise a simple rivet connection as shown in figure 3 which may be formed from a polymer.
Alternatively, in order to allow for repair or replacement of the valve body 30, the intermediate connecting member 60' may comprise a snap fit connector as shown in Figure 4. The snap fit intermediate connecting member 60' comprises a plate 62 at a first end and a plurality of sprung tabs 64 which extend away from the plate 62. The tabs 64 are resilient such that they may be inwardly displaced to pass through the aperture 35 of the valve body 30 and stepped outward projections 65 at the distal end. The projections 65 engage the seal face of the valve body 30 when passed through the aperture 35 and to thereby be retained within the aperture 35.
An alternative embodiment of the invention is shown in figure 5 in which like components to those of the first embodiment are shown with corresponding reference numbers prefixed with a 1. The second embodiment includes a PEEK injection moulded valve body 130 having a compliant seal 150 comoulded in a 2K moulding process. In contrast to the first embodiment the valve body f the second embodiment is permanently attached to the hinge 140. The hinge 140 of the second embodiment is integral with the valve body 130. In order to provide a robust and reliable arrangement the hinge 140 may be formed of a metal hinge body which is moulded into the valve body 130.
As exemplified by the two embodiments described above, embodiments of the invention may provide advantages of reduced complexity and component count. This may also simplify or reduce cost of manufacturing and/or allow for reduced manufacturing. Additionally, or alternatively, embodiments may provide a valve with reduced weight and/or cost in comparison to existing check valve designs. Various modifications will be apparent to those skilled in the art without departing from the scope of the invention as defined in the appending claims.

Claims (12)

1. A swing check valve for an aircraft fuel system, the valve comprising:
a valve body a hinge member and a compliant seal member, wherein the valve body and compliant seal member are formed in a multi-material injection moulding process.
2. A swing check valve as claimed in claim 1, wherein the valve body has a sealing face which, in use, faces the valve seat and wherein the compliant seal member may be over moulded on at least a portion of the sealing face.
3. A swing check valve as claimed in claim 1 or 2, wherein the compliant seal member extends around a peripheral portion of the valve body.
4. A swing check valve as claimed in claim 3, wherein the compliant seal member is generally annular.
5. A swing check valve as claimed in any preceding claim, wherein the compliant seal member is be moulded in, or over, a seal feature formed on the valve body.
6. A swing check valve as claimed in claim 5, wherein said seal feature comprises an annular recess formed in the face of the valve body.
7. A swing check valve as claimed in claim 6, wherein the recess is formed between two spaced apart projections.
8. A swing check valve as claimed in any preceding claim, wherein the hinge member is a metal component.
9. A swing check valve as claimed in any preceding claim, further comprising an intermediate connecting member removably connecting the hinge member and valve body.
10. A swing check valve as claimed in claim 9, wherein the intermediate connecting member comprises a snap fit connector.
11. A swing check valve as claimed in any preceding claim, wherein the valve body comprises injection moulded polyether ether ketone (PEEK).
12. An aircraft fuel pump comprising a swing check valve as claimed in any preceding claim.
GB1807547.3A 2017-11-09 2018-05-09 Check Valve Withdrawn GB2568337A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201711040034 2017-11-09

Publications (2)

Publication Number Publication Date
GB201807547D0 GB201807547D0 (en) 2018-06-20
GB2568337A true GB2568337A (en) 2019-05-15

Family

ID=62598248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1807547.3A Withdrawn GB2568337A (en) 2017-11-09 2018-05-09 Check Valve

Country Status (1)

Country Link
GB (1) GB2568337A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040011988A1 (en) * 2002-05-17 2004-01-22 Fabrizio Chini Novel gates for throttle valves
US20070084437A1 (en) * 2005-10-07 2007-04-19 Hugues Winkelmuller Valve regulating device and intake manifold comprising at least one such device
EP1975479A2 (en) * 2007-03-28 2008-10-01 O.M.C.E. di Rocchetti Amleto S.p.A. Tap or butterfly valve, in particular for containers.
US20090121172A1 (en) * 2007-11-13 2009-05-14 Snecma Relief valve in a turbomachine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040011988A1 (en) * 2002-05-17 2004-01-22 Fabrizio Chini Novel gates for throttle valves
US20070084437A1 (en) * 2005-10-07 2007-04-19 Hugues Winkelmuller Valve regulating device and intake manifold comprising at least one such device
EP1975479A2 (en) * 2007-03-28 2008-10-01 O.M.C.E. di Rocchetti Amleto S.p.A. Tap or butterfly valve, in particular for containers.
US20090121172A1 (en) * 2007-11-13 2009-05-14 Snecma Relief valve in a turbomachine

Also Published As

Publication number Publication date
GB201807547D0 (en) 2018-06-20

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)