一种细粒式滚轴筛直交迷宫动密封装置
By setting a composite labyrinth structure of radial and axial labyrinth channels and lip seals on the fine-particle roller screen, the sealing problem of the fine-particle roller screen under high dust conditions is solved, achieving a sealing effect with strong wear resistance, long service life and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN HETAI ELECTRIC POWER EQUIP CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing fine-particle roller screens suffer from wear of seals under high-dust conditions, poor dynamic sealing performance, complex structure, difficult maintenance, and failure to effectively prevent leakage of fine powder materials at the shaft hole gap.
A multi-stage throttling and blocking system composed of radial and axial labyrinth channels, combined with a lip seal, forms a composite labyrinth structure. It achieves efficient sealing through mechanical blocking and kinetic energy dissipation, avoiding direct friction between the rotating shaft and the sealing structure.
It significantly reduces the likelihood and rate of media leakage, extends the life of sealing devices, reduces maintenance frequency and costs, and maintains stable sealing performance.
Smart Images
Figure CN224515952U_ABST
Abstract
Claims
1. A fine particle roller screen right angle labyrinth dynamic seal apparatus, characterized by, include: A fixed sealing disc (1) is used to be installed on the equipment housing; The labyrinth ring (2) is connected to the fixed sealing disc (1) and includes a radial labyrinth channel (8) and a first axial labyrinth structure arranged sequentially along the material leakage direction; A sealing sleeve (3) is fitted on the shaft and can rotate with the shaft. A second axial labyrinth structure is provided on the rotating mating surface of the sealing sleeve (3) and the labyrinth ring (2). The first axial labyrinth structure and the second axial labyrinth structure cooperate to form an axial labyrinth channel (9).
2. The direct labyrinth seal for a fine particle sifter roller screen according to claim 1, wherein, It also includes a lip seal (4), the labyrinth ring (2) is provided with a stepped groove, along the material leakage direction, the stepped groove is located downstream of the first axial labyrinth structure, the stepped groove and the sealing sleeve (3) form a lip seal installation chamber, the lip seal (4) is located in the lip seal installation chamber and is sleeved on the sealing sleeve (3).
3. The fine particle roller screen right angle labyrinth dynamic seal apparatus of claim 1, wherein, The labyrinth ring (2) is connected to the fixed sealing disc (1) by bolts.
4. The direct labyrinth seal for a fine particle sifter roller screen according to claim 1, wherein, The sealing sleeve (3) is connected to the shaft by a locking screw (6).
5. The direct labyrinth seal for a fine particle sifter roller screen according to claim 2, wherein, The lip seal (4) has an open split structure and is axially positioned by an open retaining ring (7).
6. The direct labyrinth seal for a fine particle sifter roller screen according to claim 1, wherein, It also includes a lubrication channel (5), which is disposed on the fixed sealing disc (1) and / or the labyrinth ring (2) for injecting lubricating medium into the sealing area.
7. The fine particle roller screen right angle labyrinth dynamic seal apparatus of claim 6, wherein, The lubrication channel (5) includes at least one grease inlet, and the injected grease serves to lubricate and airtighten.
8. The direct labyrinth seal for a fine particle sifter roller screen according to claim 1, wherein, The fixed sealing disc (1) has a split structure.
9. The fine particle roller screen right angle labyrinth dynamic seal apparatus of claim 1, wherein, The fixed sealing disc (1) is made of No. 45 steel and its surface is treated with zinc plating, nickel-chromium plating or epoxy resin spraying for corrosion protection.
10. The direct labyrinth seal for a fine particle sifter roller screen in accordance with claim 2, wherein, The labyrinth ring (2) is made of stainless steel or carbon steel with anti-corrosion treatment, and the lip seal (4) is made of fluororubber, polyurethane or nitrile rubber.