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CN-224229241-U - Sealing structure of mechanical fusion machine

CN224229241UCN 224229241 UCN224229241 UCN 224229241UCN-224229241-U

Abstract

The utility model relates to the technical field of mechanical fusion machines, in particular to a sealing structure of a mechanical fusion machine, which is arranged between a main shaft and an end cover of the mechanical fusion machine, wherein a sealing cavity surrounding the main shaft is formed in the end cover, the sealing structure is arranged in the sealing cavity, the sealing structure comprises a first sealing component and a second sealing component which are arranged at intervals, a gap between the first sealing component and the second sealing component forms an air sealing cavity, an air passage communicated with the air sealing cavity is formed in the end cover, the first sealing component is positioned on one side of the sealing cavity close to a cylinder, the second sealing component is positioned on one side of the sealing cavity far away from the cylinder, the first sealing component comprises a first check ring and a first sealing piece, and the dual functions of powder blocking and lubricating oil leakage prevention are realized through the separation design of the first sealing component and the second sealing component on the powder side.

Inventors

  • Bian Haoping

Assignees

  • 无锡泰贤粉体科技有限公司

Dates

Publication Date
20260512
Application Date
20250526

Claims (5)

  1. 1. The sealing structure of the mechanical fusion machine is characterized in that the sealing structure is arranged between a main shaft (1) and an end cover (2) of the mechanical fusion machine, a sealing cavity (21) surrounding the main shaft (1) is formed in the end cover (2), and the sealing structure is arranged in the sealing cavity (21); This seal structure includes first seal assembly (3) and second seal assembly (4) of interval arrangement, clearance between first seal assembly (3) and second seal assembly (4) constitutes atmoseal chamber (5), set up air flue (22) with atmoseal chamber (5) intercommunication on end cover (2), first seal assembly (3) are located seal chamber (21) and are close to barrel (6) one side, second seal assembly (4) are located seal chamber (21) and keep away from barrel (6) one side, first seal assembly (3) include first retaining ring (31) and first sealing member (32), first retaining ring (31) of cavity wall centre gripping that first sealing member (32) and seal chamber (21) are close to barrel (6) one side.
  2. 2. The sealing structure of the mechanical fusion machine according to claim 1, wherein a first lip (321) and a second lip (322) are arranged on the inner ring of the first sealing element (32) at intervals, the first lip (321) and the first sealing element (32) form a heavy V-shaped seal, and the second lip (322) and the first sealing element (32) form a double V-shaped seal.
  3. 3. A sealing structure of a mechanical fusion machine according to claim 2, wherein the first lip (321) and the second lip (322) are deflected toward the side close to the cylinder (6).
  4. 4. A sealing structure of a mechanical fusion machine according to claim 1, wherein the second sealing assembly (4) comprises an oil seal retainer ring (41), a first oil seal (42), a spacer ring (43) and a second oil seal (44), the second oil seal (44) is contacted with a cavity wall of a side, far away from the cylinder body (6), of the sealing cavity (21), the spacer ring (43) is gradually located between the first oil seal (42) and the second oil seal (44), and the second oil seal (44) is located between the spacer ring (43) and the oil seal retainer ring (41).
  5. 5. A sealing structure of a mechanical fusion machine according to claim 1, characterized in that the main shaft (1) is provided with a wear-resistant sleeve (11), which sealing structure is arranged between the wear-resistant sleeve (11) and the end cap (2).

Description

Sealing structure of mechanical fusion machine Technical Field The utility model relates to the technical field of mechanical fusion machines, in particular to a sealing structure of a mechanical fusion machine. Background The mechanical fusion machine is widely applied in the fields of powder treatment, alloy preparation and the like, and the sealing structure between the main shaft and the end cover is required to bear severe working conditions such as high-speed rotation, high temperature, high pressure, powder invasion and the like. The traditional sealing structure adopts single lip seal or filler seal, and has the defects that powder is easy to invade into an included angle gap between a lip of a sealing element and a main shaft, so that abrasion failure of the sealing element is accelerated, the replacement period of the sealing element is short, and the powder is easy to leak under high-speed rotation, so that the working environment is polluted. Disclosure of utility model The utility model aims to solve the technical problems that in the prior art, a single lip seal or a packing seal is adopted for a traditional sealing structure, and the sealing structure of a mechanical fusion machine has the defects that powder is easy to invade a bearing cavity to cause lubrication failure and lubricant is easy to leak and pollute materials under high-speed rotation. The utility model solves the technical problems by adopting the technical scheme that the sealing structure of the mechanical fusion machine is arranged between a main shaft and an end cover of the mechanical fusion machine, a sealing cavity surrounding the main shaft is arranged on the end cover, and the sealing structure is arranged in the sealing cavity; The sealing structure comprises a first sealing component and a second sealing component which are arranged at intervals, a gas seal cavity is formed in a gap between the first sealing component and the second sealing component, an air passage communicated with the gas seal cavity is formed in an end cover, the first sealing component is located on one side of the sealing cavity, which is close to the cylinder, and the second sealing component is located on one side, which is far away from the cylinder, of the sealing cavity, the first sealing component comprises a first check ring and a first sealing component, the first check ring is clamped by the first sealing component and the cavity wall, which is close to one side of the cylinder, of the sealing cavity, the separation design of the first sealing component and the second sealing component is realized on the powder side, the dual functions of powder blocking and lubricating oil leakage prevention are realized, and compressed gas is introduced into the gas seal cavity to form a positive pressure barrier, so that bidirectional medium permeation is effectively prevented. In order to solve the problem that the common lip seal has low blocking rate to superfine powder, the sealing device further comprises a first lip and a second lip which are arranged on the inner ring of the first sealing element at intervals, the first lip and the first sealing element form a heavy V-shaped seal, and the second lip and the first sealing element form a double V-shaped seal. In order to solve the problem of medium permeation caused by improper deflection direction of the sealing lip, the sealing device further comprises a first lip and a second lip which deflect towards the side close to the cylinder. In order to solve the problem that dislocation invalidation easily takes place for the assembly of many oil seals, further include that second seal assembly includes oil blanket retaining ring, first oil seal, spacer ring and second oil seal, the chamber wall contact of barrel one side is kept away from to second oil seal and sealed chamber, and the spacer ring is located first oil seal and second oil seal gradually, and second oil seal is located between spacer ring and the oil blanket retaining ring. In order to solve the problem of sealing failure caused by direct abrasion of the main shaft, the sealing structure further comprises a wear-resistant sleeve arranged on the main shaft, and the sealing structure is arranged between the wear-resistant sleeve and the end cover. The sealing structure of the mechanical fusion machine has the beneficial effects that the sealing structure of the mechanical fusion machine realizes the dual functions of powder blocking and lubricating oil leakage prevention through the separation design of the first sealing component and the second sealing component at the powder side, and the air sealing cavity is filled with compressed gas to form a positive pressure barrier, so that the bi-directional medium permeation is effectively prevented. Drawings The utility model will be further described with reference to the drawings and examples. FIG. 1 is a schematic diagram of the structure of the present utility model; fig. 2 is an enlarge