Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner
Patent
1997-06-26
1999-04-06
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Fluid pressure responsive discharge modifier* or flow...
Fuel injector or burner
451 36, 451115, B24B 1504
Patent
active
058906592
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a valve closing body, a process and a device as set forth hereinafter. DE 39 25 043 A1 has already disclosed a valve closing body, a process, and a device for carrying out the process, wherein according to the process, the valve closing body is brought into contact with the valve seat face of the valve seat body and is set into a rotational movement and an oscillation movement that acts parallel to the rotational axis with high frequency transmitted to the valve seat body and the valve closing body. Surfaces with very high surface quality are in fact produced, but when the longitudinal closing body axis is tilted in relation to the longitudinal valve seat axis, it is not guaranteed that a sufficient seal is still produced. For an ideal sealing of the valve closing body against the valve seat face of the valve seat body of the valve, it is necessary that the shape of the sealing seat of the valve closing body and the shape of the valve seat body are as favorably close to circular as possible along the sealing line at which the sealing seat of the valve closing body touches the valve seat face of the valve seat body. However, since the valve closing body can never be so precisely guided that its longitudinal closing body axis coincides identically with the longitudinal valve seat axis, that is, a certain guidance play always leads to a tilted position of the valve closing body in relation to the longitudinal valve seat axis, in order to achieve the ideal circular shape along the sealing line inside the contact zone between the valve closing body and the valve seat body, the sealing seat on the valve closing body has to be embodied as ball-shaped.
ADVANTAGES OF THE INVENTION
The valve closing body according to the invention has the advantage that the valve is permitted to be shut off by means of a narrow sealing seat, even if the valve closing body is imprecisely guided in the valve. In a simple manner, the process according to the invention, which is for manufacturing sealing seats on valve closing bodies, and the device according to the invention, which is for carrying out the process for manufacturing sealing seats on valve closing bodies, permit the production of ideal, rotationally symmetrical sealing seats in the form of a ball zone.
Advantageous improvements and updates of the process and device disclosed are possible by means of the measures taken.
It is particularly advantageous to generate the compressive force on the valve closing body by means of compressed air and thus to produce the compressive force of the valve closing body against the tool body in a contact-free manner that generates no wear and tear.
It is likewise advantageous to generate the high-speed rotation of the valve closing body by means of compressed air directed at the valve closing body, that is in a contact-free manner that generates no wear and tear.
BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments of the invention are represented in a simplified fashion in the drawings and are explained in detail in the subsequent description.
FIG. 1 shows a valve closing body embodied according to the invention, in the form of a valve needle, partially shown, resting against a valve seat face of a valve seat body,
FIG. 2 is a simplified representation of a device according to the invention for producing a valve closing body according to the invention and according to FIG. 1,
FIG. 3 is a partial representation of a valve closing body embodied according to the invention, resting against a tool according to FIG. 2, and
FIG. 4 is a section along the line IV--IV in FIG. 2.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
In FIG. 1, the reference numeral 1 indicates a partially represented valve closing body in the form of a valve needle, as is used in known fuel injection valves for fuel injection systems of internal combustion engines with externally supplied ignition. As disclosed for example in DE 39 25 043 A1, the valve closing body is guided in a valve seat body 2 in a guide bore 3 and can be slid
REFERENCES:
patent: 5315792 (1994-05-01), Schweizer et al.
Land Peter
Schoeffel Eberhard
Seidel Josef
Bocanegra Jorge S.
Greigg Edwin E.
Greigg Ronald E.
Kashnikow Andres
Robert & Bosch GmbH
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