CN102128268A

CN102128268A - Radial moving sealing device

Info

Publication number: CN102128268A
Application number: CN2010106102072A
Authority: CN
Inventors: 张申
Original assignee: Xian Aero Engine Controls Co Ltd
Current assignee: Xian Aero Engine Controls Co Ltd
Priority date: 2010-12-23
Filing date: 2010-12-23
Publication date: 2011-07-20

Abstract

The invention relates to a radial moving sealing device, and in particular relates to a seal between two objects for a sealing liquid under the condition of high-speed rotation. The technical scheme of the invention is as follows: the radial moving sealing device is composed of a static piece 1 and a rotation piece 2, and a cavity penetrates through the interior of the static piece 1 and the interior of the rotation piece 2; a circular contact surface exists between the static piece 1 and the rotation piece 2; the surface, which is contact with the static piece 1, of the rotation piece 2 is provided with lines 3 the machining traces of which are in a circular arc radial pattern; and the extending direction of the lines 3 is corresponding to the rotation direction of the rotation piece 2. The invention has the beneficial effects that the rotation of the rotation piece 2 has a trend of moving outward, an effect similar to a centrifugal pump is formed, thus liquids at the exterior of the moving sealing structure are difficult to enter the inner cavity of the sealing structure, and the unidirectional sealing effect of the moving seal is improved.

Description

The dynamic radial seal device

Affiliated field:

The present invention relates to a kind of dynamic radial seal device, relate in particular to the sealing that exists between a kind of two objects of seal fluid under the high speed rotating situation.

Background technique:

Consult Fig. 1, the dynamic radial seal structure generally is made of static element 1 and rotating component 2, and a cavity runs through static element 1 and rotating component 2 inside; There is a ring-type surface of contact between static element 1 and the rotating component 2.In order to guarantee sealing effect, require the surface of surface of contact smooth fully in theory, but be subjected to the restriction of mechanical processing tools, actual produced component surface can stay the lines of machining can not be smooth fully, so influenced the effect of the sealing of structure.

Summary of the invention:

The objective of the invention is the adverse effect sealing effect brought for the component surface lines that reduces machining, the present invention proposes a kind of new dynamic radial seal device.

Technological scheme of the present invention is: a kind of dynamic radial seal device, constitute by static element 1 and rotating component 2, and a cavity runs through static element 1 and rotating component 2 inside; There is a ring-type surface of contact between static element 1 and the rotating component 2; The material hardness of described static element 1 is HRCa, and the material hardness of described rotating component 2 is HRCb, b-a＞10, and the constituent material of described static element 1 has the coating that self-lubricating property is arranged on self-lubricating property or the static element 1; The rotating shaft of rotating component 2 is consistent with the surface of contact normal orientation; With the lines 3 that is the circular arc radial arrangement on the surface of static element 1 contacted rotating component 2 for cutter trade, and roughness that should the surface is less than Ra0.4, if see that from the surface of contact end sense of rotation of rotating component 2 is counterclockwise, processing lines 3 circular arcs should begin to launch along clockwise direction from the center; On the contrary, if see that from the surface of contact end sense of rotation of rotating component 2 is clockwise directions, lines 3 circular arcs should begin to launch in the counterclockwise direction from the center.

Beneficial effect of the present invention: during work, because there is radial processing lines 3 on rotating component 2 surfaces, liquid between static element 1 and rotating component 2 slits, to produce the outwards trend of motion along with the rotation of rotating component 2, form the effect of similar centrifugal pump, make the liquid of movable sealing structure outside be difficult to enter the sealing configuration inner chamber, thereby improved the one-way sealing effect of motive sealing.And the rotating speed of rotating component 2 is high more, and this effect is obvious more.This device has improved the sealing effect of dynamic radial seal device, and technology is simple, realizes that cost is lower.

Description of drawings:

Fig. 1: dynamic radial seal apparatus structure schematic representation

Fig. 2: lines 3 schematic representation of dynamic radial seal device among the embodiment 1

Fig. 3: lines 3 schematic representation of dynamic radial seal device among the embodiment 2

Among the figure: 1-static element, 2-rotating component, 3-lines

Specific embodiment:

Embodiment 1:

Consult Fig. 1, Fig. 2, a kind of dynamic radial seal device is made of static element 1 and rotating component 2, and a cavity runs through static element 1 and rotating component 2 inside; There is a ring-type surface of contact between static element 1 and the rotating component 2; The material of described static element 1 is a graphite, and the material of described rotating component 2 is GCr ₁₅, its hardness is HRC ₆₀The rotating shaft of rotating component 2 is consistent with the surface of contact normal orientation; Be the lines 3 of circular arc radial arrangement with cutter trade is arranged on the surface of static element 1 contacted rotating component 2, and roughness that should the surface is Ra0.2, sees that from the surface of contact end processing lines 3 circular arcs begin to launch along clockwise direction from the center.

Embodiment 2:

Consult Fig. 1, Fig. 3, a kind of dynamic radial seal device is made of static element 1 and rotating component 2, and a cavity runs through static element 1 and rotating component 2 inside; There is a ring-type surface of contact between static element 1 and the rotating component 2; The material of described static element 1 is QA110-4-4, and its hardness is HB220, and the material of described rotating component 2 is 4Cr ₁₄Ni ₁₄W ₂Mo, its hardness is HRC56; The coating MoS that self-lubricating property is arranged on the static element 1 ₂The rotating shaft of rotating component 2 is consistent with the surface of contact normal orientation; Be the lines 3 of circular arc radial arrangement with cutter trade is arranged on the surface of static element 1 contacted rotating component 2, and roughness that should the surface is Ra0.2, sees that from the surface of contact end processing lines 3 circular arcs begin to launch in the counterclockwise direction from the center.

Claims

1. a dynamic radial seal device is made of static element (1) and rotating component (2), and a cavity runs through static element (1) and rotating component (2) inside; Static element (1) and rotating component v2) between have a ring-type surface of contact; The material hardness of described static element (1) is HRCa, and the material hardness of described rotating component (2) is HRCb, b-a＞10; The rotating shaft of rotating component (2) is consistent with the surface of contact normal orientation; With the lines (3) that is the circular arc radial arrangement on the surface of the contacted rotating component of static element (1) (2) for cutter trade, and roughness that should the surface is less than Ra0.4, if see that from the surface of contact end sense of rotation of rotating component (2) is counterclockwise, processing lines (3) circular arc should begin to launch along clockwise direction from the center; On the contrary, if see that from the surface of contact end sense of rotation of rotating component (2) is a clockwise direction, lines (3) circular arc should begin to launch in the counterclockwise direction from the center.

2. a dynamic radial seal device as claimed in claim 1 is characterized in that, the constituent material of described static element (1) has self-lubricating property.

3. a dynamic radial seal device as claimed in claim 1 is characterized in that, the coating of self-lubricating property is arranged on the described static element (1).