Sealing importance in tile adhesive powder batching mix plant
Author：ANT CONSTRUCTIONS Comefrom： Createdate：2020/11/4 9:23:14 Hits：16
Sealing importance in tile adhesive powder batching mix plant
Sealing is a very important technical index in the machinery industry, which determines the performance of the machine and the quality of the equipment in some way. As the tile adhesive dry powder batching mix plant industry, sealing also plays a vital role in the tile adhesive dry powder batching mix plant.
The early sealing problems of vertical tile adhesive dry powder batching mix plant caused many problems. The bearing of the vertical mixer is below, the poor sealing make powder enter the bearing, this easy to damge the bearing, so the maintenance rate of the vertical mixer is very high. Many manufacturers are actively researching countermeasures to improve the seal, but due to the design of the machine itself, a good seal can only last for half a year and the bearing must be replaced. The normal seal is basically replaced in 2-3 months on average. The high maintenance cost of the bearing caused too many problems for both manufacturers and customers.
Sealing is such an important position in tile adhesive dry powder batching mix plant, so that machinery manufacturers have also begun to develop new equipment and research new seals. The selection of mechanical seal structure is an important step in the design process, and must be investigated first: working parameters-medium pressure, temperature, shaft diameter and speed. Media characteristics-concentration, viscosity, corrosiveness, if materials include solid particles and fiber impurities, whether it is easy to vaporize or crystallize, etc. Operating characteristics and environmental conditions of the main engine-continuous or intermittent operation; the main engine is installed indoors or outdoor; the nature of the surrounding atmosphere and temperature changes. Taking into account many factors, the sealing problem is finally solved in the horizontal putty powder mixer, and the horizontal putty powder mixer has also won many awards such as high performance and low failure.
In the tile adhesive dry powder batching mix plant, the mixer has higher requirements for sealing. In addition to considering the choice of the mechanical seal mechanism, it also considers the allowable leakage volume and leakage direction (internal leakage or external leakage) requirements of the mixer; the life and reliability requirements, the restriction on the sealing structure size of the mixer, operation and production process stability, etc.
For the weakly corrosive medium, the built-in mechanical seal is usually selected, its end face force state and medium leakage direction are more reasonable than the external type.
For strong corrosive media, because the selection of spring materials is difficult, external or PTFE bellows mechanical seals can be selected, but generally only suitable for the range of p≤0.2～0.3MPa.
For the media easy to crystallize, solidify and high viscosity, should adopt a large spring rotating structure. Because the small spring is easily blocked by solids, high-viscosity media will block the axial compensation movement of the small spring.
For flammable, explosive and toxic media, in order to ensure that the tile adhesive dry powder batching mix plant does not leak, the double-end structure with sealing liquid (isolating liquid) should be adopted. The structure selected according to the above working parameters and medium characteristics is often only a preliminary plan, the characteristics of the host and some special requirements for sealing must be considered in the final determination. For example, the sealing life of a rocket engine only takes a few minutes, but it is required never leak in a short time. In order to obtain more effective space, the main engine on the ship often puts forward and very strict requirements on the size and installation position of the seal. Another example is the drainage pump on the submarine. During the ups and downs of the submarine, the pressure changes greatly. In these cases, the standard structure cannot be selected according to the routine, but a special design must be made for the specific working conditions, and the necessary auxiliary measures must be taken at the same time.
The sealing problem is a relatively important issue in the tile adhesive dry powder batching mix plant. After all, the production process of dry powder is a closed mixing process, and the mixing is all powder. If the sealing is not rigorous, various problems can easily occur.
