IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0278661
(2007-01-27)
|
등록번호 |
US-8365763
(2013-02-05)
|
우선권정보 |
DE-10 2006 007 363 (2006-02-17) |
국제출원번호 |
PCT/EP2007/000714
(2007-01-27)
|
§371/§102 date |
20090326
(20090326)
|
국제공개번호 |
WO2007/093273
(2007-08-23)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
8 |
초록
▼
A pressure limiting valve has a control element (10) which can be acted on in an opening direction, against a first control face, by a pressure which is to be limited, and which can be acted on in a closing direction by a spring (16) and, against a second control face, by a control pressure prevaili
A pressure limiting valve has a control element (10) which can be acted on in an opening direction, against a first control face, by a pressure which is to be limited, and which can be acted on in a closing direction by a spring (16) and, against a second control face, by a control pressure prevailing in a control pressure space (14). The pressure prevailing in the control pressure space can be limited by means of a pilot control valve (21). A control fluid can be supplied to the control pressure space through the control element via a control fluid nozzle (48). Upstream of the first control face, a plate (38) is held on the control element. Formed between the plate and the first control face is a gap with a predefined gap dimension. Said gap is situated upstream of the control fluid nozzle.
대표청구항
▼
1. A pilot-controlled pressure limiting valve with a control element (10) that may be acted upon in the opening direction, against a first control surface (41), by a pressure which is to be limited, and that may be acted upon in the closing direction by a spring (16) and, against a second control su
1. A pilot-controlled pressure limiting valve with a control element (10) that may be acted upon in the opening direction, against a first control surface (41), by a pressure which is to be limited, and that may be acted upon in the closing direction by a spring (16) and, against a second control surface (33, 34), by a control pressure that exists in a control pressure chamber (14), and with a precontrol valve (21, 22), via which the pressure present in the control pressure chamber (14) may be limited, it being possible to supply control fluid to the control pressure chamber (14) through the control element (10) via a control fluid nozzle (48), wherein, in front of the first control surface (41), a plate (38) is held on the control element (10), a gap (50) is formed between the plate (38) and the first control surface (41) with a predefined gap dimension, and the gap (50) is located upstream of the control fluid nozzle (48), wherein the gap forms an annular tap point for the control fluid between an outer edge of the plate (38) and the first control surface (41). 2. The pilot-controlled pressure limiting valve according to claim 1, wherein the control element (10) includes a raised area (42), against which the plate (38) bears. 3. The pilot-controlled pressure limiting valve according to claim 1, wherein a raised area (91) is formed on a side of the plate (38) facing the control element (10), via which the plate (38) bears against the control element (10). 4. The pilot-controlled pressure limiting valve according to claim 3, wherein the raised area (91) is designed as a nub-shaped embossing of the plate (38). 5. The pilot-controlled pressure limiting valve according to claim 1, wherein the plate (38) includes a sleeve-shaped section (70) that projects from a side of the plate (3R) facing the control element (10) and that accommodates a fastening means (39), and via which the plate (38) rests on the control element (10). 6. The pilot-controlled pressure limiting valve according to claim 1, wherein a circular cylinder-shaped threaded section (92) is formed on the plate (38), with which the plate (38) is fastened in a bore (36) of the control element (10). 7. The pilot-controlled pressure limiting valve according to claim 6, wherein the fluid control nozzle is designed as a bore (96) in the threaded section (92). 8. The pilot-controlled pressure limiting valve according to claim 1, wherein the fluid control nozzle is designed as a bore (48) in the control element (10), and an opening in the bore (48) is covered by the plate (38). 9. The pilot-controlled pressure limiting valve as recited in claim 1, wherein the plate (38) is designed essentially in the shape of a circular disk. 10. The pilot-controlled pressure limiting valve as recited in claim 1, wherein the plate (38) is made of an easily-worked metal, wherein the metal is selected from the group consisting of non-hardened steel, aluminum, or brass. 11. The pilot-controlled pressure limiting valve as recited in claim 1, wherein the gap dimension is smaller than a diameter of the control fluid nozzle (48). 12. The pilot-controlled pressure limiting valve according to claim 1, wherein the gap dimension is smaller than a smallest diameter of a channel (19, 24) from the control pressure chamber (14) to the precontrol valve (21, 22). 13. The pilot-controlled pressure limiting valve as recited in claim 1, wherein the gap dimension is less than 0.3 millimeters. 14. The pilot-controlled pressure limiting valve according to claim 1, wherein the control fluid nozzle (48; 96) opens toward an annular recess (46; 86) in the first control surface (41) and/or toward an annular recess (75) in a side of the plate (38) facing the first control surface (41). 15. The pilot-controlled pressure limiting valve as recited in claim 1, wherein the plate (38) is retained on the control element of the pressure limiting valve. 16. The pilot-controlled pressure limiting valve according to claim 12, wherein the gap dimension is smaller than a diameter of a damping nozzle (25) downstream of the precontrol valve (21, 22). 17. The pilot-controlled pressure limiting valve as recited in claim 13, wherein the gap dimension has a value of 0.15 millimeters to 0.25 millimeters.
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