CN210423710U - Split insertion type spiral mechanical sealing device - Google Patents

Abstract

An opposite-opening insertion type spiral mechanical sealing device is characterized in that a ring groove (4) is formed in the end face of the outer side of a movable oil retainer (1), an oil slinger (5) is arranged on the side wall of the inner side of the ring groove (4), an oil return hole (6) is formed in the side wall of the inner side of the ring groove (4), an outward-extending cornice (7) is arranged on the outer edge of the outer side end of the movable oil retainer (1), an insertion section (9) matched with the ring groove (4) is arranged at the inner side end of a static oil retainer (2), the oil return hole (6) is formed in the insertion section (9), an oil check ring (10) is arranged on the outer wall of the insertion section (9), an oil return spiral line (11) is arranged on the inner wall of the outer side end of the static oil retainer (2), the insertion section (9) at the inner side end of the static oil retainer (2) extends into the ring. The problem of reform transform in the axle bush of change narrow and small, high oil level, high oil pressure operation oil leak in space is solved. The high-temperature and high-dust environment works without oil leakage.

Description

Split insertion type spiral mechanical sealing device

Technical Field

The utility model relates to a mechanical seal device, concretely relates to bayonet spiral mechanical seal device of open type.

Background

The seal between the relatively moving parts in the machine (or equipment) is a dynamic seal. The dynamic seal is divided into a reciprocating dynamic seal and a rotary dynamic seal. For rotary dynamic seals, there are contact dynamic seals where the moving and stationary parts are in direct contact; the two are not directly contacted with each other; the sealed semi-fluid dynamic seal is achieved by the special properties of the fluid added in the seal gap. At present, in the actual use process, because the used mechanical equipment has various complex operating conditions and different use environments, the existing sealing structure still has the problem of poor sealing. For example, when the sealing portion has a high oil level and a high oil pressure, the sealing portion may still leak.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: provides a split insertion type spiral mechanical sealing device with good sealing effect.

The technical solution of the utility model is that: the split-type inserted spiral mechanical sealing device comprises a movable oil slinger, a static oil slinger and a sealing end cover, the outer side end face of the movable oil slinger is provided with a ring groove, the inner side wall of the ring groove is provided with an oil slinger, the inner side wall of the ring groove is provided with an oil return hole penetrating through the inner wall and the outer wall of the ring groove, the outer edge of the outer side end of the movable oil slinger is provided with an outward-extending cornice, the movable oil slinger is fixedly connected with the rotating shaft, the inner side end of the static oil slinger is provided with an insertion section matched with the ring groove of the outer side end face of the movable oil slinger, the insertion section is provided with an oil return hole penetrating through the inner wall and the outer wall of the insertion section, the inner wall of the outer side end of the static oil slinger is provided with an oil return, the inserted section of the inner side end extends into the ring groove of the movable oil slinger, and the static oil slinger is fixedly connected with the sealing end cover.

The technical effects of the utility model are that: the sealing device solves the problem of oil leakage in the operation of narrow modification space, high oil level and high oil pressure in the bearing bush of the rotary machine due to the fact that the inner circle and the outer circle of the static oil slinger are both designed with spiral lines. The sealing device is suitable for working in high-temperature and high-dust environment with the rotating speed of not more than 60000r/min and no oil leakage. Because gaps are reserved among all parts of the whole sealing device, and the friction phenomenon does not occur among all parts, spare parts do not exist in the improved sealing device. The whole sealing device is designed in a split mode, so that the existing running rotary machine equipment is convenient to reform. The sealing device has the design service life of 100 years and the service life of 50 years, and the transformed sealing device is free of maintenance and has no spare parts.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic structural view of the movable oil slinger semi-ring of the present invention;

fig. 3 is a schematic structural diagram of the stationary oil slinger semi-ring of the present invention.

Detailed Description

As shown in fig. 1 to 3, the split-type inserted screw mechanical sealing device comprises a movable oil slinger 1, a static oil slinger 2 and a sealing end cover 3, wherein an annular groove 4 is formed on the outer side end face of the movable oil slinger 1, an oil slinger 5 is arranged on the inner side wall of the annular groove 4, an oil return hole 6 penetrating through the inner wall and the outer wall of the annular groove 4 is arranged on the outer side wall of the annular groove 4, an outward-extended flying eave 7 is arranged on the outer edge of the outer side end of the movable oil slinger 1, the movable oil slinger 1 is fixedly connected with a rotating shaft 8, an insertion section 9 matched with the annular groove 4 on the outer side end face of the movable oil slinger 1 is arranged on the inner side end of the static oil slinger 2, the insertion section 9 is provided with an oil return hole 6 penetrating through the inner wall and the outer wall of the insertion section 9, an oil slinger 10 is arranged on the outer wall of the outer side end of, the inserting section 9 of the inner side end extends into the ring groove 4 of the movable oil slinger 1, and the static oil slinger 2 is fixedly connected with the sealing end cover 3.

The oil control rings 10 on the outer wall of the insertion section 9 of the static oil control ring 2 are a plurality of annular bodies.

The oil control ring 10 on the outer wall of the insertion section 9 of the static oil control ring 2 is a continuous spiral line.

The movable oil slinger 1 is fixedly connected with the rotating shaft through a jackscrew.

The movable oil slinger 1, the static oil slinger 2 and the sealing end cover 3 are all annular bodies formed by connecting two semi-annular bodies.

The two half ring bodies are connected in a positioning mode through parts such as positioning pins, positioning key grooves and the like so as to improve the connection precision, and the two half ring bodies are fastened through bolts. The connecting pieces can be sealed by sealant to prevent leakage.

All parts of the whole sealing device are in a split mode, are buckled on the rotating shaft and are screwed and fixed by lug plate screws on the sealing end covers, so that the sealing devices of the two half parts form a complete set of sealing device. When the rotating machine rotates, lubricating oil can overflow towards the outer side of the end cover along the axial direction, when the lubricating oil meets the rotating movable oil slinger, the lubricating oil can be thrown to the inner wall of the tile seat by the rotating movable oil slinger, the secondary rebounding of the lubricating oil thrown to the inner wall is carried out on the axial gap between the movable oil slinger and the static oil slinger and enters the outer circle of the static oil slinger, the lubricating oil depends on the self-weight of the lubricating oil, flows down from the high position of the oil slinger of the static oil slinger and flows to the cavity wall of the ring groove of the movable. Because the cavity wall of the movable oil slinger is provided with N oil return holes, the lubricating oil is thrown into the bearing bush through the oil return holes under the action of high-speed rotation of the movable oil slinger. If a few parts of lubricating oil are not pumped back to an oil pool in the bearing bush, the lubricating oil enters through an axial gap between the movable oil slinger and the static oil slinger and falls onto a rotating shaft, the lubricating oil flows back to an annular groove of the movable oil slinger through an oil return hole of the static oil slinger under the action between a spiral line on the inner circle of the movable oil slinger and the static oil slinger and a rotating shaft, and the lubricating oil is thrown into the bearing bush again through an oil throwing hole under the action of high-speed rotation of the movable oil slinger, so that an internal oil return system is formed.

Claims (5)

1. The split-type inserted spiral mechanical sealing device comprises a movable oil retainer (1), a static oil retainer (2) and a sealing end cover (3), and is characterized in that the outer side end face of the movable oil retainer (1) is provided with a ring groove (4), the inner side wall of the ring groove (4) is provided with an oil slinger (5), the inner side wall of the ring groove (4) is provided with an oil return hole (6) penetrating through the inner wall and the outer wall of the ring groove, the outer edge of the outer side end of the movable oil retainer (1) is provided with an outward-extended cornice (7), the movable oil retainer (1) is fixedly connected with a rotating shaft (8), the inner side end of the static oil retainer (2) is provided with an insertion section (9) matched with the ring groove (4) of the outer side end face of the movable oil retainer (1), the insertion section (9) is provided with the oil return hole (6) penetrating through the inner wall and the outer wall of the insertion section (9), the outer wall of the insertion, the outer wall of the outer side end of the static oil slinger (2) is provided with a connecting part connected with the sealing end cover (3), the static oil slinger (2) is sleeved on the rotating shaft (8), the insertion section (9) of the inner side end of the static oil slinger extends into the annular groove (4) of the movable oil slinger (1), and the static oil slinger (2) is fixedly connected with the sealing end cover (3).

2. The split-type inserted screw mechanical seal device according to claim 1, wherein the oil slinger (10) of the outer wall of the insertion section (9) of the static oil slinger (2) is a plurality of annular bodies.

3. The split-insertion type screw mechanical seal device according to claim 1, wherein the oil slinger (10) of the outer wall of the insertion section (9) of the static oil slinger (2) is a continuous spiral.

4. The split-insertion type screw mechanical seal device according to claim 1, wherein the movable slinger (1) is fixedly connected with the rotating shaft through a jackscrew.

5. The split-type inserted screw mechanical seal device according to claim 1, wherein the movable slinger (1), the static slinger (2) and the seal end cover (3) are all annular bodies formed by connecting two half ring bodies.

Images