CN107965577B

CN107965577B - Super-hard material surfacing mechanical sealing ring

Info

Publication number: CN107965577B
Application number: CN201711466495.7A
Authority: CN
Inventors: 梁琦; 张欣; 李冬青
Original assignee: Dalian Weierbo Alloy Technology Co ltd
Current assignee: Dalian Weierbo Alloy Technology Co ltd
Priority date: 2017-12-28
Filing date: 2017-12-28
Publication date: 2023-08-01
Anticipated expiration: 2037-12-28
Also published as: CN107965577A

Abstract

The invention discloses a superhard material surfacing mechanical sealing ring which comprises a movable sealing ring and a static sealing ring, wherein the end face of the static sealing ring, which is in contact with the movable sealing ring, is provided with an annular chip guiding groove, the outer ring of the annular chip guiding groove is formed by surfacing superhard carbide, the inner ring is formed by surfacing superhard carbide, a plurality of spiral chip discharging grooves opposite to the rotating direction of the movable sealing ring are formed in the inner ring, the annular chip guiding groove and the spiral chip discharging grooves are formed by surfacing of low-hardness materials, and the surfaces of the annular chip guiding groove, the outer ring, the inner ring and the spiral chip discharging grooves are flush. The first abrasion position on the working surfaces of the movable sealing ring and the static sealing ring is provided with an annular chip guiding groove and a plurality of spiral chip discharging grooves, high-hardness metal chips are enriched on the annular chip guiding groove, and the metal chips can enter the plurality of spiral chip discharging grooves opposite to the rotating direction along the annular chip guiding groove to be discharged under the action of centrifugal force, so that the high-hardness metal chips are prevented from continuously corroding the working surfaces.

Description

Super-hard material surfacing mechanical sealing ring

Technical Field

The invention relates to the field of mechanical sealing, in particular to a super-hard material surface-mounted mechanical sealing ring.

Background

The mechanical seal ring is a shaft seal device of a rotary machine, such as a re-centrifugal pump, a centrifugal machine, a reaction kettle, a compressor and the like, and since a transmission shaft penetrates inside and outside the device, a circumferential gap exists between the shaft and the device, a medium in the device leaks outwards through the gap, and if the pressure in the device is lower than the atmospheric pressure, air leaks into the device, so that a shaft seal device for preventing leakage is necessary. Mechanical seal rings are generally used in the world as the most dominant shaft sealing means in these devices because of their low leakage and long life. The mechanical sealing ring mainly comprises a movable sealing ring and a static sealing ring, and during the use process, the abrasion surface is enriched with worn high-hardness metal chips due to the mutual abrasion of the static sealing ring and the movable sealing ring, and the metal chips have higher hardness and are seriously corroded a working surface. The surfacing is an economical and rapid process method for modifying the surface of materials, and is increasingly widely applied to the manufacturing and repairing of parts in various industrial departments. The build-up welding is a process method that alloy materials with certain service performance are clad on the surface of parent materials by means of certain heat source means so as to endow the parent materials with special service performance or restore the original shape and size of the parts. The method can prolong the service life of the part, and can ensure that the surface of the common material obtains a surfacing layer with wear resistance, corrosion resistance and high hardness.

Therefore, it is necessary to invent a superhard material build-up welding mechanical seal ring to eliminate the high hardness swarf that is enriched on the wear surface.

Disclosure of Invention

The invention aims to provide a super-hard material surface-mounted mechanical sealing ring which solves the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a superhard materials heap welding machinery sealing ring, includes movable sealing ring and quiet sealing ring, quiet sealing ring with the terminal surface build-up welding superhard carbide material of movable sealing ring contact, movable sealing ring with the terminal surface of the bad contact of quiet sealing is provided with annular chip guide groove, the outer ring of annular chip guide groove adopts superhard carbide build-up welding, the inner ring set up with movable sealing ring rotation opposite a plurality of spiral chip grooves, annular chip guide groove with a plurality of spiral chip grooves adopt low hardness material build-up welding, annular chip guide groove, outer ring, inner ring and a plurality of spiral chip groove's surface flushes.

Further, the plurality of spiral chip grooves and the annular chip guiding groove are intersected at the joint, and the angle between the tangent line passing through the annular chip guiding groove at the joint and the plurality of spiral chip guiding grooves is smaller than 90 degrees.

Further, the angle between the tangent line passing through the annular chip guiding groove at the joint and the spiral chip guiding grooves is 30-60 degrees.

The invention has the technical effects and advantages that: according to the invention, the annular chip guide grooves and the spiral chip removal grooves are arranged on the end face, which is in contact with the static sealing ring, of the dynamic sealing ring, and the annular chip guide grooves and the spiral chip removal grooves are supplemented by using materials with low hardness, so that the first abrasion position on the working surface is shown on the annular chip guide grooves and the spiral chip removal grooves, worn high-hardness metal chips can enter the spiral chip removal grooves along the annular chip guide grooves under the action of centrifugal force and are discharged out of the working surface, the corrosion of the high-hardness metal chips on the working surface is avoided, and the working life of the mechanical sealing ring is prolonged.

Drawings

FIG. 1 is a schematic view of the structure of the end face of a movable seal ring according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention at end face A of a dynamic seal ring;

FIG. 3 is a schematic view of the end face of a stationary seal ring according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of an embodiment of the invention at the stationary seal ring end face B.

In the figure: the end face of the static sealing ring 1, the static sealing ring 2, the annular chip guiding groove 3, the outer ring 4, the movable sealing ring 5, the inner ring 6, the spiral chip grooves 7 and the joint of the spiral chip guiding grooves 8.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention provides a superhard material surfacing mechanical sealing ring as shown in figures 1-4, which comprises a movable sealing ring 5 and a static sealing ring 2, wherein the end face 1 of the static sealing ring, which is contacted with the movable sealing ring 5, of the static sealing ring is surfacing by adopting a superhard carbide material to form a plane, an annular chip guiding groove 3 is arranged on the end face, which is contacted with the static sealing ring 2, of the movable sealing ring 5, an outer ring 4 of the annular chip guiding groove 3 is surfacing by adopting the superhard carbide, an inner ring 6 of the annular chip guiding groove 3 is surfacing by adopting the superhard carbide, a plurality of spiral chip removing grooves 7 which are opposite to the rotating direction of the movable sealing ring 5 are arranged on the inner ring 6, the annular chip guiding groove 3 and the plurality of spiral chip removing grooves 7 are surfacing by adopting a low-hardness material, and the surfaces of the annular chip guiding groove 3, the outer ring 4, the inner ring 6 and the plurality of spiral chip removing grooves 7 are flush. Because the annular chip guiding groove 3 and the plurality of spiral chip discharging grooves 7 are formed by overlaying low-hardness materials, when the static sealing ring 2 and the dynamic sealing ring 5 work, worn-out parts are arranged on the annular chip guiding groove 3 and the plurality of spiral chip discharging grooves 7 first, and worn-out high-hardness metal chips can be enriched on the annular chip guiding groove 3 and the plurality of spiral chip discharging grooves 7.

As shown in fig. 1, the plurality of spiral chip grooves 7 and the annular chip grooves 3 are intersected at the joint 8, the angle between the tangent line of the annular chip groove 3 passing through the joint 8 and the plurality of spiral chip grooves 7 is smaller than 90 degrees, when the movable sealing ring 5 rotates along the arrow direction shown in fig. 1, the high-hardness metal chips enriched on the annular chip grooves 3 and the plurality of spiral chip grooves 7 enter the plurality of spiral chip grooves 7 through the annular chip grooves 3 under the action of centrifugal force to be discharged into the working surface, and when the angle between the tangent line of the annular chip groove 3 and the plurality of spiral chip grooves 7 at the joint 8 is 30-60 degrees, the high-hardness metal chips can enter the plurality of spiral chip grooves 7 through the annular chip grooves 3 more quickly to be discharged into the working surface.

The working principle of the invention is as follows: according to the superhard material surfacing mechanical sealing ring disclosed by the invention, the superhard carbide material is surfacing on the end surface of the contact of the static sealing ring and the movable sealing ring, the annular chip guide grooves and the plurality of spiral chip grooves are arranged on the end surface of the contact of the movable sealing ring and the static sealing ring, the superhard carbide material is surfacing on the other part of the end surface, the annular chip guide grooves and the plurality of spiral chip grooves are surfacing of low-hardness materials and form a complete plane with the other part of the end surface, when the movable sealing ring rotates, worn high-hardness metal chips firstly appear at the annular chip guide grooves and the plurality of spiral chip grooves with low hardness, and the high-hardness metal chips enter the plurality of spiral chip grooves to be discharged out of a working surface under the action of centrifugal force along the annular chip guide grooves, so that continuous corrosion of the high-hardness metal chips to the working surface is avoided, and the service life of the mechanical sealing ring is prolonged.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a superhard materials heap welder mechanical seal ring, includes movable seal ring (5) and quiet sealing ring (2), its characterized in that: the ultra-hard carbide surfacing welding device is characterized in that the static sealing ring (2) is in surfacing welding with a static sealing ring end face (1) contacted with the movable sealing ring (5), the movable sealing ring (5) is provided with an annular chip guiding groove (3) on the end face contacted with the static sealing ring (2), an outer ring (4) of the annular chip guiding groove (3) is in surfacing welding with ultra-hard carbide, an inner ring (6) of the annular chip guiding groove (3) is in surfacing welding with ultra-hard carbide, a plurality of spiral chip discharging grooves (7) opposite to the rotating direction of the movable sealing ring (5) are arranged on the inner ring (6), the annular chip guiding groove (3) is in surfacing welding with the plurality of spiral chip discharging grooves (7) with low hardness materials, and the surfaces of the annular chip guiding groove (3), the outer ring (4), the inner ring (6) and the plurality of spiral chip discharging grooves (7) are flush.

2. The superhard material packing mechanical seal ring of claim 1, wherein: the spiral chip grooves (7) and the annular chip guiding grooves (3) are intersected at a connecting position (8), and the angle between the tangent line of the annular chip guiding grooves (3) passing through the connecting position (8) and the spiral chip grooves (7) is smaller than 90 degrees.

3. A superhard material packing mechanical seal ring as claimed in claim 2, wherein: the angle between the tangent line of the annular chip guiding groove (3) passing through the connecting part (8) and the plurality of spiral chip discharging grooves (7) is 30-60 degrees.