IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0665046
(2003-09-17)
|
우선권정보 |
DE-0044527 (2002-09-25) |
발명자
/ 주소 |
- Mayr, Karlheinz
- Kill, Walter
- Schmidt, Thilo
- Philipp, Gunter
- Remmlinger, Hubert
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
A proportional pressure-regulator valve comprising a load-dependent control step and a method for the load-dependent regulation of a pressure level of a pressure medium with one proportional pressure-regulator valve. The load-dependent control step is obtained with a proportional magnet (1) having a
A proportional pressure-regulator valve comprising a load-dependent control step and a method for the load-dependent regulation of a pressure level of a pressure medium with one proportional pressure-regulator valve. The load-dependent control step is obtained with a proportional magnet (1) having at least two gaps (10, 12) for regulating the magnetic force. The size of the gaps (10, 12) can be adjusted independently of each other. While a first gap (!2) is current-dependent regulated, the size of the second gap (10) can be regulated via a pressure force adaptable in proportion to a load requirement in the hydraulic circuit.
대표청구항
▼
1. A proportional pressure-regulator valve for regulating a pressure level in a hydraulic circuit, comprising:a housing containing an armature rod (5) extending between a proportional magnet (1) in the housing and a control element situated in the hydraulic circuit; the proportional magnet (1) havin
1. A proportional pressure-regulator valve for regulating a pressure level in a hydraulic circuit, comprising:a housing containing an armature rod (5) extending between a proportional magnet (1) in the housing and a control element situated in the hydraulic circuit; the proportional magnet (1) having a magnetic coil (4), a magnetic core and a magnetic armature (3) connected to the armature rod (5), and said magnetic coil (4) and at least a part of said magnetic core are firmly connected with said housing (11); a magnetic force existing within a first gap (12) between said magnetic armature (3) and said magnetic core for axially moving said magnetic armature (3) back and forth between a first and a second end positions within an interior space of said magnetic coil (4); said magnetic core partly projects into the interior space of said magnetic coil (4) and is concurrently concentrically situated about said armature rod (5) and the motion of said magnetic armature (3) relative to said first magnetic core results in an actuation of said control element, and wherein said proportional magnet (1) also has an adjustable second gap (10) for regulating the magnetic force axially moving said magnetic armature (3). 2. The proportional pressure-regulator valve according to claim 1, wherein said magnetic core comprises at least one first part (2) and one second part (6) provided coaxially about said armature rod (5).3. The proportional pressure-regulator valve according to claim 2, wherein said second part of said magnetic core (6) is positioned axially movable between said first part of said magnetic core (6) and said housing (11) to define the adjustable second gap (10) for said first part of said magnetic core (2).4. The proportional pressure-regulator valve according to claim 2, wherein said first part of said magnetic core (6) is disposed concentrically around said armature rod (5) and the relative axial motion of said second part of said magnetic core (6) results from a pressure force.5. The proportional pressure-regulator valve according to claim 4, wherein to produce the pressure force, a shift valve (13), which can be removably contacted with said second part of said magnetic core (6) to axially supply the pressure force to said second part of said magnetic core (6).6. The proportional pressure-regulator valve according to claim 5, wherein said shift valve (13) is made of non-magnetic material and is concentrically disposed around and axially movably relative to said armature rod (5).7. The proportional pressure-regulator valve according to claim 4, wherein the pressure force can be produced hydraulically, pneumatically, or mechanically.8. The proportional pressure-regulator valve according to claim 7, wherein said shift valve (13) is actuated in proportion respectively to a load requirement and a hydraulic pressure in the hydraulic circuit.9. The proportional pressure-regulator valve according to claim 5, wherein said shift valve (13) is designed as a hollow cylindrical sleeve which is located in a passage of said housing (11) and seals the passage oil-tight.10. The proportional pressure-regulator valve according to claim 5, wherein said shift valve (13) has on a front side a substantially annular pressure surface which is connected with a feed line (16) of the hydraulic circuit and can be loaded with a hydraulic pressure force.11. The proportional pressure-regulator valve according to claim 2, wherein said first part (2) and said second part (6) of said magnetic core have corresponding contact surfaces (7, 8) which produce in the second gap (10) a radial magnetic field line crossing between said second part (6) and said first part (2) of said magnetic core.12. The proportional pressure-regulator valve according to claim 11, wherein said contact surface (7) of said first part (2) of said magnetic core is situated upon an outer cone.13. The proportional pressure-regulator valve according to claim 11, wherein said contact surface (8) of said second part (6) of said magnetic core is designed upon an inner cone.14. The proportional pressure-regulator valve according to claim 5, further comprising a breather hole (15) in said housing (11) which ventilates the space formed by said shift valve (13), said second part of said magnetic core (6) and said housing (11).15. The proportional pressure-regulator valve according to claim 2, wherein between said second part (6) and said first part (2) of said magnetic core (6), concentrically with said armature rod (5), a pressure spring (9) is disposed which produces a spring tension between said second part (6) and said first part (2) of said magnetic core and said shift valve (13) and wherein said spring tension counteracts the hydraulic pressure force.16. The proportional pressure-regulator valve according to claim 2, wherein a non-magnetic disc (17) is provided which firmly connects the first part (2) of said magnetic core with said housing (11).17. A method for regulating a pressure level in a hydraulic circuit with one proportional pressure-regulator valve comprising the steps of:providing an armature rod (5) extending between a control element located in the hydraulic circuit with a proportional magnet comprising a magnetic core, a magnetic armature (3) and a magnetic coil (4); axially moving said magnetic armature (3) back and forth between a first and a second end positions according to a magnetic force existing in an air gap (18) controlling the magnetic force according to a magnetic flow in a magnetic circuit which is adjustable by an amount of electric current applied to said magnetic coil (4); providing a magnetic core comprising at least one first part (2) and one second part (6); and creating in the magnetic circuit a second gap (10) to generate a magnetic resistance for regulating the magnetic force. 18. The method according to claim 17, further comprising the step of adjusting said second gap (10) by moving a second part of said magnetic core (6) positioned coaxially about said armature rod (5).19. The method according to claim 18, further comprising the step of hydraulically, pneumatically or mechanically actuating a shift valve (13) to move said second part of said magnetic core (6).20. The method according to claim 19, further comprising the step of actuating said shift valve (13) by a hydraulic pressure proportional to a load requirement in the hydraulic circuit and adjusting the magnetic force according to the electric current flowing into said magnetic coil (4) and the load requirement in the hydraulic circuit.21. The method according to claim 17, further comprising the step of adjusting the magnetic force between said first part of said magnetic core (2) and the magnetic armature (3) as the width of said second gap (10) diminishes and the magnetic resistance in the magnetic circuit becomes weaker.22. The method according to claim 17, further comprising the steps of positioning a pressure spring between said second part (6) and said first part (2) of said magnetic core, which, as the hydraulic force diminishes on said second part of said magnetic core (6), the second part moves away from said first part of said magnetic core (2) enlarging said second gap (10) between said second part (6) and said first part (2) of the magnetic core and diminishing the magnetic force.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.