Control valves for fluids
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0813706
(1977-07-07)
|
우선권정보 |
GB-19760034374 (1976-08-18) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
1 |
초록
▼
A control valve for fluids has two relatively rotatable plates, each having ports which cooperate to control fluid flow. The plates are biased towards one another, and one of the plates is provided with lands round its ports, these lands creating a space between the plates, to which space the fluid
A control valve for fluids has two relatively rotatable plates, each having ports which cooperate to control fluid flow. The plates are biased towards one another, and one of the plates is provided with lands round its ports, these lands creating a space between the plates, to which space the fluid pressure at the valve inlet is admitted. The pressure between the plates opposes the inlet pressure acting on one of the plates, and the areas of the aforesaid one plate subjected to the inlet pressure are selected so as to produced a desired force between the plates.
대표청구항
▼
1. A control valve for fluids comprising a body having an inlet and an outlet, a bore through which fluid can flow from said inlet, a control element sealingly slidable in said bore, a port plate including first port means located between said control element and said outlet, means for maintaining o
1. A control valve for fluids comprising a body having an inlet and an outlet, a bore through which fluid can flow from said inlet, a control element sealingly slidable in said bore, a port plate including first port means located between said control element and said outlet, means for maintaining opposed faces of said port plate and control element in mutual sliding and sealing engagement in a plane substantially perpendicular to the axis of said bore, a passage through said control element from said bore and opening onto said control element face to define a second port means, means for causing relative sliding between said opposed faces, said sliding resulting in variation of the overlapping areas of said first and second port means, a raised land surrounding one of said port means and defining one of said opposed faces, the cross sectional area of said bore being substantially equal to the sum of the cross sectional areas of one of the port means and of half the area of the face defined by said land so that variations in fluid pressure at said inlet do not materially affect axial force applied to said control element. 2. A control valve as claimed in claim 1 in which the cross-sectional area of said bore is between 1.01 and 1.04 times said sum. 3. A control valve as claimed in claim 1 in which said first port means comprises a plurality of first ports, and said control element comprises a plate having a plurality of second ports equal in number to said first ports. 4. A control valve as claimed in claim 1, in which said port plate and said control element are relatively rotatable. 5. A control valve as claimed in claim 4 in which said first ports are arcuate about the axis of said relative rotation. 6. A control valve as claimed in claim 1 comprises an electric motor driving coupled to said port plate. 7. A control valve as claimed in claim 6 in which said motor is a stepping motor. 8. A control valve for fluids, comprising a body having an inlet and an outlet, a bore through which fluid can flow from said inlet, a control element sealingly axially slidable in said bore, said control element having a center, a port plate between said control element and said outlet, means for maintaining opposed faces of said port plate and said control element in mutual sliding contact, means for causing relative sliding between said control element and said port plate, a plurality of spaced first ports in said control element, said first ports communicating with said bore and opening on to said control element face, a corresponding number of second ports in said port plate, said second ports opening onto said port plate face, said relative sliding causing variation in the areas of overlap between said first and second ports, said control element face being provided with first raised lands surrounding said first ports and second raised lands each extending between adjacent first ports and connecting said first raised lands together to define a zone which is enclosed by said lands between said control element and said port plate and which is isolated from said inlet in all relative operating positions of said control element and said port plate by said lands, said second raised lands all being arcuate and all having a common center of curvature which is located near said control element center. 9. A valve as claimed in claim 8, in which the cross sectional area of said bore is substantially equal to the sum of the cross sectional areas of said one of the port means and of half the area of the face provided by said lands so that variations in fluid pressure at said inlet do not materially affect axial force applied to said control element. 10. A valve as claimed in claim 8 which includes means for providing communication between said enclosed zone and said outlet, in all relative positions of said port plate and said control element. 11. A valve as claimed in claim 9 in which said means for providing communication between said enclosed zone and said outlet comprises portions of said second ports.
이 특허에 인용된 특허 (1)
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Scheuermann Klaus (Unteres Plantahaus CH 7524 Zuoz CH), Mixing valve system.
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O'Reilly Paul Bernard ; Daum James Whittier ; Latif Tariq ; Mowery Richard William, Rotary fluid valve systems.
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