It causes the sealing ring skeleton to fall from the cavity, which is the elasticity of the outer rubber to the temperature compensation to ensure that the oil seal outer ring is closely fit to the cavity hole. Rubber Small Knowledge: Plasticizer increases the physical properties of low temperature and facilitates mixing and structure, and this may change aging at high temperatures.

What kind of repair package is rotating oil seal? An elastic rubber material is used to radially lip the dynamic seal. . Tell you a non-leaked rotation seal with the appropriate elastomeric material (low hardness, good heat resistance, low abrasion) morphology, sealed ring position, and spring position.

Antifactor prevents aging, such as atmospheric or oxygen, ozone, and ultraviolet erosion, making complex organic matter for mixture treatment concentration degradation mode. Therefore, the rotating oil seal is generally used on a large, heavy rotation axis, mainly sealed oil, lipid, and water and other fluids. What is the interface characteristics of rotating oil seal?

A microscopic rough tissue occurs after the contact lip is engaged, and the height is formed, sometimes micro-waveforms, contrary to alignment, and due to the oil seal manufactured by these characteristic China mechanical seal face Manufacturers wear materials, leaks may occur in use because rough tissue The microscopic pumping action is provided, and the potential leakage is retued to the oil side.

Common rotating oil seals are also known as repair packs, which belong to outsourced rubber type skeletons can be adapted to both thermal crisons and more shrinkage, and the Foshan seal is based on steel for skeleton, and the seal structure can ensure that the material changes with temperature

امتیاز بدهید :

     To obtain an alumina ceramic material with high wear resistance, it is not only necessary to consider its high density, high flexural strength and compressive strength, but also to improve its hardness and fracture toughness, which are very different from alumina ceramics. The microstructure (closed porosity, grain size, glass phase distribution, etc.) and its wear mechanism are closely related.​​

1. Influence of raw material powder The most important raw material of alumina wear-resistant ceramics is high-purity alumina powder. Its properties and content have a great influence on alumina wear-resistant ceramics. Ceramic powder will inevitably introduce impurities during the preparation process, and organic impurities will be bued during the sintering process, and irregular pores will be formed during the densification process; inorganic impurities will react with the ceramic powder at high temperatures or in the matrix. microcracks are formed. These impurities have a significant effect on the densification of alumina ceramics. The particle size of the raw material powder also has a great influence on the performance of the product. Only when the raw material is fine enough, the final sintered product can form a microcrystalline structure, which makes it have good wear resistance. Therefore, high-purity, fine-grained alumina powder is an important prerequisite for the preparation of wear-resistant alumina ceramics.​​

Influence of molding method Production practice and a large number of studies have shown that alumina ceramics with low porosity and high density have excellent structural properties. High density refers to the close arrangement of grains in the ceramic body, which is not easy to develop and form destructive breakthrough points when subjected to exteal environmental loads or corrosive substances. In order to obtain a high density ceramic body molding method is crucial. Alumina wear-resistant ceramics can generally be formed by dry pressing, wholesale china alumina ceramic components  isostatic pressing, and hot die casting. Different sintering methods have different characteristics and have different effects on the sintering properties and microstructure of alumina ceramics. Products with complex shapes are generally made by grouting or hot-press casting, and products with simple shapes are formed by dry pressing.

3. Sintering effect Sintering is a key stage of ceramic preparation, and the sintering atmosphere has a great influence on the preparation of ceramic materials. Too high sintering temperature or too long holding time will promote the growth of crystals, so that fine raw materials will develop into coarse grains at high temperature, and the content of liquid phase will increase. This not only reduces strength, but also wear resistance. Of course, if the temperature is too low, the sintered body is not dense, and the wear resistance of the product is not good. High-quality electric sintering fuace sintering can precisely control the heating, holding and cooling process, and has an important role in improving the wear resistance of ceramics, but the sintering cost and refractory consumption of electric kilns are higher than coal mines. 4. Combustion accelerant The suitable sintering agent reduces the temperature during the sintering process, improves the microstructure of the ceramic, and improves the mechanical properties, thereby effectively improving the wear resistance of the alumina wear-resistant ceramic.

امتیاز بدهید :

There are many related products made of ceramics, some of which are for decoration and some for industrial use. The performance of decorative ceramics is basically relatively simple, but the industrial use is different. In order to meet certain usage requirements, ceramics must have some special effects. Ion-conducting ceramics are a kind of industrial ceramics. Are there any defects in this ceramic material?

Ion-conducting ceramics are ceramic products with directional migration of inteal ions, but exteal force is required, and the existence of defects provides high-energy ions and more vacancies that can be occupied by migrating ions. Defects in this regard mainly include vacancy-type defects, interstitial-type defects, dislocations and grain boundaries, substitution-type impurity defects and electronic defects, which will affect the performance of ion-conducting ceramics. In general, the higher the defect concentration, the greater the number of mobile ion sites, thereby increasing the ceramic carrier concentration. At the same time, it also reduces the conductivity activation energy, which greatly increases the conductivity of the ceramic. That is to say, the properties of ion conductor ceramics are closely related to the structure and density of the material.

The Importance of Limiting the Dissolution of engineering ceramics manufacturers Lead and Cadmium in Alumina Ceramics
With the increasing awareness of environmental protection, people's requirements for all aspects are constantly improving, and even the limit requirements for the dissolution of lead and cadmium in alumina ceramic products are getting higher and higher, which requires the improvement of the production process to achieve production standard. Specifically how to do it?

On the one hand, the safety of alumina ceramics is related to the amount of lead and cadmium dissolved, and the relevant standards also impose strict restrictions on this, and the production of ceramic products that do not meet the requirements will be prohibited. In order to avoid the production of unqualified products, the drying process in alumina ceramics can be improved. In the slow drying process, the green body is sprayed alteately up and down with strong wind under a certain temperature and humidity to dry. In this way, the uneven phenomenon in the drying process of ceramic products can be effectively eliminated, so as to obtain high-quality alumina ceramic products

امتیاز بدهید :