一种橡胶密炼机的内压式迫紧密封装置
By designing a bushing mechanism and mounting flange in a rubber internal mixer, and optimizing the airflow path, the problems of insufficient heat dissipation efficiency and unclear assembly of the sealing device were solved, achieving efficient heat dissipation and stability of the sealing components, and adapting to different models of internal mixers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- URUMQI ZHONGYUAN HUIXIN PLASTIC IND CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-17
AI Technical Summary
The existing sealing devices of rubber internal mixers have insufficient heat dissipation efficiency under high temperature and high pressure, which leads to the embrittlement of graphite seals, increased sealing gaps, and problems such as rubber material leakage or air infiltration. At the same time, the assembly process is not clear and it is difficult to adapt to different models of internal mixers.
The design employs a bushing mechanism, including a metal sealing ring, a graphite sleeve, a rotating bearing, and a guide plate, to form a clear airflow path. Combined with natural or forced convection, it optimizes the airflow direction. Through the combination of air inlet pipe, heat dissipation pipe, and heat dissipation gap, it achieves efficient heat dissipation, avoids graphite embrittlement, and ensures coaxiality and sealing through an integrally molded mounting flange.
Effectively control the temperature of graphite sealing components, extend the life of seals, prevent rubber material leakage and air infiltration, and ensure the stability and adaptability of sealing devices.
Smart Images
Figure CN224515934U_ABST
Abstract
Claims
1. An internal pressure type packing seal device for a rubber kneader, characterized by: The device includes a bushing mechanism (1), an installation mechanism (2) assembled on one side of the bushing mechanism (1), and a shaft (3) penetrating the bushing mechanism (1) and the installation mechanism (2). The bushing mechanism (1) includes an assembly bushing (101), the inner wall of which is sequentially fixed with a metal sealing ring (105), two sets of graphite sleeves (601), and two sets of rotating bearings (5) along the axial direction. The outer wall of the shaft (3) is fixed with a metal sealing sleeve (106) adapted to the metal sealing ring (105) and a graphite ring (6) adapted to the graphite sleeve (601). (3) The inner ring (501) of the rotating bearing (5) is rotated and installed with the steel ball (502); the bottom of the assembly bushing (101) is fixed with an air inlet pipe (104) extending to the inner wall, and the top is fixed with a heat dissipation pipe (103) extending to the inner wall. The inner wall of the assembly bushing (101) is fixed with an arc-shaped guide plate (110) corresponding to the positions of the air inlet pipe (104) and the heat dissipation pipe (103); the installation mechanism (2) includes an installation flange (201), and an outer wall sealing plate (203) sleeved on the shaft (3) is slidably installed in the rotating groove (204) of the inner wall of the installation flange (201).
2. A rubber internal pressurized packing seal device for an internal mixer according to claim 1, characterized in that: Both the air inlet pipe (104) and the heat dissipation pipe (103) are provided with M20×1.5 threaded interfaces at their outer ends, and both are fixed with 50-80 mesh stainless steel purification mesh (109) inside. The air inlet pipe (104) can be equipped with a filter cover (4) or a miniature fan at its outer end.
3. A rubber internal pressurized packing seal device for an internal mixer according to claim 1, wherein: The outer ring of the rotating bearing (5) is interference-fitted with the inner wall of the assembly bushing (101), and the inner ring is transition-fitted with the shaft (3); the graphite sleeve (601) is fixed to the inner wall of the assembly bushing (101) by M4-M6 hexagonal bolts, and a 5-8mm heat dissipation gap is reserved between the two sets of graphite sleeves (601).
4. A rubber internal pressurized packing seal device for an internal mixer according to claim 1, wherein: The assembly bushing (101) has an annular groove (108) on the side near the mounting mechanism (2), and a fluororubber sealing ring (107) is slidably installed in the groove (108); the front and back of the outer wall of the assembly bushing (101) are provided with limiting grooves (102), and the axis of the limiting groove (102) is parallel to the axis of the assembly bushing (101).
5. The internal pressure type clamping and sealing device for a rubber mixer according to claim 1, characterized in that: The mounting flange (201) has 4-6 sets of mounting holes (202) with a diameter of 8-12mm at equal intervals along the circumference on the outer side. The mounting flange (201) and the assembly bushing (101) are integrally formed. The outer wall sealing plate (203) is made of polytetrafluoroethylene, and the gap between it and the shaft (3) is 0.05-0.08mm.