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CN-224229235-U - Sealing device for tin smoke dust conveying equipment

CN224229235UCN 224229235 UCN224229235 UCN 224229235UCN-224229235-U

Abstract

The utility model relates to a sealing device for tin smoke dust conveying equipment, which comprises a packing chamber, packing arranged in the packing chamber, a gland connected with the packing chamber and a rotating shaft penetrating through the packing chamber, wherein the packing is at least two groups of packing layers, an oil storage ring is arranged between the two groups of packing layers, an oil storage part is arranged on the outer wall of the packing chamber, the outer diameter of the oil storage ring is smaller than the inner diameter of the packing chamber, a lubricant circulation gap is formed, the inner diameter of the oil storage ring is larger than the outer diameter of the rotating shaft, a non-contact fit gap is formed, an annular oil storage groove and a radial oil guide hole communicated with the oil storage groove are formed in the oil storage ring, the oil storage part is connected with the packing chamber, and the oil outlet hole corresponds to the radial oil guide hole in position and forms a continuous oil path. The method solves the abrasion problem caused by ultrafine particle penetration and viscous agglomeration, prolongs the continuous operation period of equipment, reduces maintenance cost, reduces filler replacement frequency, reduces manual intervention frequency, reduces ton tin processing cost, reduces shaft power loss and remarkably improves the energy efficiency of the equipment.

Inventors

  • ZHANG ZHENGXIONG
  • CHEN KUN

Assignees

  • 云南锡业股份有限公司锡业分公司

Dates

Publication Date
20260512
Application Date
20250521

Claims (8)

  1. 1. The sealing device for the tin smoke dust conveying equipment comprises a packing chamber (1), packing (2) arranged in the packing chamber (1), a gland (4) connected with the packing chamber (1) and a rotating shaft penetrating through the packing chamber (1), and is characterized in that the packing (2) is at least two groups of packing layers, an oil storage ring (3) is arranged between the two groups of packing layers, an oil storage part (5) is arranged on the outer wall of the packing chamber (1), the outer diameter of the oil storage ring (3) is 0.1-0.2mm smaller than the inner diameter of the packing chamber (1), a lubricant circulation gap is formed, the inner diameter of the oil storage ring is 0.3-0.6mm larger than the outer diameter of the rotating shaft, a non-contact matching gap is formed, a circumferential oil storage groove (301) and a radial oil guide hole (302) communicated with the oil storage groove (301) are arranged on the oil storage ring (3), the oil storage part (5) is connected with the packing chamber (1), and the oil holes correspond to the radial oil guide hole (302) in position, and form a continuous oil path.
  2. 2. The sealing device for the tin fume conveying equipment according to claim 1, wherein the oil storage part (5) is an oil cup, and the filler chamber (1) is provided with a connecting hole (101) corresponding to an outlet of the oil cup.
  3. 3. A sealing arrangement for a tin fume conveying device according to claim 2, characterized in that the bottom of the oil cup is provided with a threaded interface which is screwed with the connection hole (101).
  4. 4. The sealing device for tin fume conveying equipment according to claim 1, wherein the diameter of the radial oil guide holes (302) is 1-3mm, and 4-6 groups are uniformly distributed along the radial direction of the oil storage ring (3).
  5. 5. The sealing device for tin fume conveying equipment according to claim 4, wherein the axial thickness of the oil storage ring (3) is 1.2-1.5 times of the single-layer thickness of the packing layer.
  6. 6. The sealing device for tin fume conveying equipment according to claim 4, wherein the oil storage ring (3) is made of 316L stainless steel or hastelloy, and the surface roughness Ra is less than or equal to 0.8 μm.
  7. 7. Sealing arrangement for a tin fume conveying device according to claim 4, characterized in that the oil storage ring (3) is provided with temporary oil storage areas (303) on both sides in the axial direction and inside the sealing sides with the two sets of packing layers.
  8. 8. Sealing arrangement for a tin fume conveying apparatus according to any one of claims 1-7, characterized in that the oil storage ring (3) is of unitary or split construction.

Description

Sealing device for tin smoke dust conveying equipment Technical Field The utility model relates to the technical field of dust conveying equipment of a crude tin smelting system, in particular to a sealing device for tin dust conveying equipment. Background In tin smelting and recovery processes, the dynamic sealing technology of fume delivery equipment faces serious challenges. Tin smoke mainly consists of ultrafine particles (volatile metal compounds such as SnO 2, snS, trace As, pb, zn, ce and the like are main components), and the special physicochemical properties of the tin smoke lead to the following systematic defects of the traditional packing seal: 1. The penetration problem of ultrafine particles is that the median particle diameter of tin smoke is 1-5 mu m, which is far smaller than that of conventional industrial dust, and the interlayer gap of the conventional filler seal is generally larger than 10 mu m. The particles are easy to penetrate the filler layer to form a vicious circle of leakage-accumulation-abrasion, the leaked particles accumulate on the sealing surface to cause abnormal abrasion between the filler and the rotating shaft, the abrasion further enlarges the gap, the penetration of the particles is increased, and the leakage rate is continuously increased (more than 500 mL/h). 2. The friction failure caused by particle adhesion is that SnO 2 particles have high surface activity, are easy to adsorb environmental moisture to form viscous agglomerates, the friction coefficient of the filler and a rotating shaft is obviously increased by the adherends, the abrasion of a sealing surface is accelerated, and friction heat is overlapped with a high-temperature working condition (less than or equal to 300 ℃) to cause the hardening of the filler and the loss of elasticity, so that frequent manual compaction and adjustment are needed. Furthermore, the manual operation has two contradictions that when the pressing force is too large, the shaft power loss is as high as 4-6kW (accounting for 8% -12% of the total energy consumption), and when the pressing force is insufficient, the sealing is invalid and the leakage rate exceeds the standard. 3. The existing solution has the limitations that the leakage problem is generally solved by adopting a mode of changing the filler at high frequency (period <10 days) or frequently adjusting the compression degree of the filler (shaft loss is more than 5%), but the operation and maintenance cost is greatly increased, the filler is frequently stopped and changed, a large amount of manpower and material resources are consumed, the ton tin processing cost is obviously increased, the energy efficiency is low, the high shaft power loss and the manual intervention further reduce the equipment economy, the environment risk is caused, the field pollution is caused by the leaked smoke dust, and the unorganized emission compliance risk exists. The technical bottleneck shows that the traditional sealing structure can not meet the comprehensive requirements of the tin smoke dust conveying working condition on long-acting sealing, low energy consumption and easy maintainability. Therefore, an innovative sealing device is needed to fundamentally block ultrafine particle penetration, reduce friction loss and realize autonomous compensation of sealing performance. Disclosure of utility model Therefore, the utility model aims to provide a sealing device for tin smoke dust conveying equipment, which is used for fundamentally blocking ultrafine particle penetration, reducing friction loss and realizing autonomous compensation of sealing performance. The technical scheme of the utility model is that the sealing device for the tin smoke dust conveying equipment comprises a packing chamber, packing arranged in the packing chamber, a gland connected with the packing chamber and a rotating shaft penetrating through the packing chamber, wherein the packing is at least two groups of packing layers, an oil storage ring is arranged between the two groups of packing layers, an oil storage part is arranged on the outer wall of the packing chamber, the outer diameter of the oil storage ring is 0.1-0.2mm smaller than the inner diameter of the packing chamber, a lubricant circulation gap is formed, the inner diameter of the oil storage ring is 0.3-0.6mm larger than the outer diameter of the rotating shaft, a non-contact matching gap is formed, a circumferential oil storage groove and a radial oil guide hole communicated with the oil storage groove are formed in the oil storage ring, the oil storage part is connected with the packing chamber, and the oil outlet hole corresponds to the radial oil guide hole in position and forms a continuous oil path. According to the sealing device, the oil storage part is the oil cup, and the filler chamber is provided with a connecting hole corresponding to the outlet of the oil cup. According to the sealing device disclosed by the utility model, the bot