High carbon fiber packing

High carbon fiber packingUsing high-strength carbon fiber continuous filament weaving, impregnated with quasi nanometer graphite powder or PTFE and special lubricants to form a dense structure.

Ceramics traditionally refers to pottery and porcelain, but also includes artificial inorganic non-metallic materials such as glass, enamel, refractory materials, bricks, cement, lime, etc. Since these materials are all produced from natural silicate minerals, ceramic materials are also silicate materials. In the past two to three decades, ancient ceramic materials have made great progress, and many new ceramic materials have compositions far beyond the range of silicates. The performance of ceramics is facing significant breakthroughs, and they are increasingly widely used in many fields of modern industry and science and technology. Nowadays, ceramic materials are actually a general term for various inorganic non-metallic materials, which, together with metals and polymer materials, have become the main pillars of modern engineering materials.

1. Classification of ceramic sealing materials

Engineering ceramic materials mainly include three categories: inorganic glass, glass ceramics, and ceramics. There are many types of ceramics, and according to convention, ceramics are generally divided into three categories: traditional ceramics, special ceramics, and metal ceramics.

(1) Traditional ceramics

Traditional ceramics, also known as ordinary ceramics, mainly refer to clay products. According to their performance characteristics and applications, they can be divided into daily-use ceramics, architectural ceramics, electrical insulation ceramics, chemical ceramics, and porous ceramics.

(2) Special ceramics

Special ceramics are ceramics with various special mechanical, physical, or chemical properties. According to their performance characteristics and applications, they are divided into high-temperature ceramics, magnetic ceramics, piezoelectric ceramics, electro-optic ceramics, and capacitor ceramics.

(3) Metal ceramics

The production method of powder metallurgy includes three major processes: powder milling, forming, and sintering, similar to the production method of ceramics. Therefore, metal materials produced by powder metallurgy are often collectively referred to as metal ceramics. The classification of metal ceramics is the same as that of steel. The commonly referred to metal ceramics refer to the portion of metal ceramics that are based on oxides and non oxides, with metals as binders, and have composition and performance characteristics similar to ceramics.

Ceramics, as sealing materials, mainly refer to special ceramics and metal ceramics, which are widely used in sealing. Of particular importance are high-temperature ceramics, which have two main chemical compositions: one is oxide ceramics such as AI2O3, BeO, Cr2O3, etc., and the other is non oxide ceramics such as carbides, borides, nitrides, and silicides.

2. Main characteristics of ceramic sealing materials

(1) High stiffness

The stiffness is measured by the elastic modulus, which reflects the strength of the bonding bond. Therefore, ceramics with strong chemical bonds have a high elastic modulus, which is the highest among all materials, several times higher than metals and 2-4 orders of magnitude higher than polymer materials. The elastic moduli of several typical ceramics are shown in Table 1.

The elastic modulus is not sensitive to tissue, including grain size and crystal morphology, but is greatly affected by porosity. Pores will reduce the elastic modulus of the material.

(2) High hardness

The hardness of materials, like their stiffness, is also determined by the strength of chemical bonds, so ceramics have the highest hardness among all types of materials, which is their biggest characteristic. For example, the hardness of various ceramics is mostly 1000-5000HV, the hardness of quenched steel is 500-800HV, and the hardness of polymer materials does not exceed 20HV,

Application devices:

Suitable for high-speed rotary pumps, reciprocating pumps, centrifugal pumps, mixers, stirrers, and stern sealing pipes. It can also be used for valve and kettle packing sealing.

Application industry:

The use of petroleum equipment, chemicals, fertilizers, power generation, ships, etc.

Application medium:

Mineral oil, weak acid, salt solution, water, saltwater, industrial wastewater

Technical SpecificationsIt has excellent properties such as self-lubricating, high strength, high modulus, high pressure resistance, corrosion resistance, wear resistance, good thermal conductivity, chemical stability, etc. It can be applied to media such as mineral oil, weak acid, salt solution, water, salt water, industrial wastewater, etc. It has outstanding sealing performance.

Scope of application：

Packing seals for rotating pumps, reciprocating pumps, centrifugal pumps, mixers, agitators, etc. with corrosive, high and low temperature, high pressure, and particle containing fluid media at high linear speeds. They can also be used as packing for valves, kettles, and stern sealing pipes. Widely applicable, * used in industrial industries such as petroleum equipment, chemical industry, fertilizer, power generation, and shipbuilding.

Specifications：

3mm-50mmSpecial specifications or various non-standard products can be customized according to customer requirements.

Dacheng Hualing Sealing Material Factory is a professional manufacturerHigh carbon fiber packing manufacturer, producedThe price of high carbon fiber discs is reasonableWith excellent quality, all kinds of sealing products produced are favored by consumers due to their quality and favorable prices. The product is durable and welcome new and old customers to inquire and purchase.

It is not easy to choose a product with good quality and low price on the Internet. The Internet is full of merchants who claim that their quality is good. However, due to distance and time, customers cannot see the product in person, so it gives merchants an opportunity to take advantage of it. The product names are all called. However, even the same product can have different quality levels. It is a common practice for some illegal merchants to pass the inferior product off as the superior one, thus obtaining greater profits. But it's like buying and selling with a hammer, and customers are not easy to deceive. When customers discover problems, it's like smashing their own brand, and the road will only become narrower and narrower. Hualing Sealing has always been steadfast in its corporate philosophy, delivering products to customers without sacrificing quality for short-term gains. This is also a prerequisite for gaining customer trust. Hualing Sealing will definitely sail with honesty and trustworthiness to ride the waves in the online torrent!

Hualing shares with you the performance requirements of sealing materials:

The sealing material should meet the requirements of sealing function. Due to the different sealed media and working conditions of the equipment, it is required that the sealing material has different applicability. The requirements for sealing materials are:

① The material has good density and is not easy to leak the medium; If the density is loose, it is easy to leak the medium.

② Having appropriate mechanical strength and hardness; When selecting a product, one should fully understand its mechanical strength and hardness.

③ Good compressibility and resilience, with minimal deformation;

④ Not softening or decomposing at high temperatures, not hardening or brittle cracking at low temperatures;

⑤ Good corrosion resistance, able to work in media such as acid, alkali, and oil, with small changes in volume and hardness, and does not adhere to metal surfaces;

⑥ Low friction coefficient and good wear resistance;

⑦ Has the flexibility to fully adhere to the sealing surface;

⑧ Good aging resistance and durability.

The above is the performance requirements for sealing materials shared by Hualing with you. We hope it can help customers choose ideal and good products. If you need our help, please consult us in a timely manner, and we will be waiting for your call at any time.

Hualing shares with you several misconceptions about repairing mechanical seals:

1The greater the compression of the tension spring, the better the sealing effect. In fact, if the tension of the spring is too large, it can cause rapid wear of the friction pair and burn out in an instant; Excessive tightening causes the tension spring to lose its ability to regulate the end face of the dynamic ring, resulting in seal failure.

2The tighter the sealing diagram of the moving ring, the better. Actually, tightening the dynamic ring seal is harmful and not beneficial. One is to increase the wear of the sealing ring and shaft sleeve, leading to premature leakage; Secondly, it increases the resistance to axial adjustment and movement of the moving ring, making it difficult to make timely adjustments when working conditions change frequently; Thirdly, excessive fatigue of the tension spring can easily damage it; The fourth is to deform the sealing ring of the moving ring, which affects the sealing effect.

3The tighter the static ring seal, the better. The static ring seal is completely in a stopped state, and a relatively tight seal will have better sealing effect, but being too tight is also harmful. One is that it causes excessive deformation of the static ring seal, which affects the sealing effect; The second reason is that the static ring material is mostly graphite, which is generally brittle and can easily break under excessive stress; Thirdly, the installation and disassembly are difficult, and it is easy to damage the static ring.

4The tighter the impeller lock nut, the better. Leakage between the shaft sleeve and the shaft (inter shaft leakage) is quite common in mechanical seal sealing. It is generally believed that inter shaft leakage is caused by the impeller lock nut not being tightened. However, there are many factors that can lead to inter shaft leakage, such as the failure and displacement of the inter shaft gasket, impurities in the inter shaft, significant positional errors at the joint between the shaft and the shaft sleeve, damage to the touch surface, gaps between various components on the shaft, and excessively long screw threads on the shaft head, all of which can cause inter shaft leakage. Excessive locking of the locking nut will only cause premature failure of the shaft pad. On the contrary, moderately locking the locking nut will maintain a certain degree of tightness and elasticity of the shaft pad. During operation, the locking nut will actively lock, keeping the shaft pad in a protruding sealing state.

5The new is better than the old. Relatively speaking, using new mechanical seals for sealing is better than using old ones, but the quality or material selection of new mechanical seals for sealing is not timely, and errors in cooperation scale can greatly affect the sealing effect; In polymeric and permeable media, it is still better not to replace the static ring if there is no excessive wear. Because the stationary ring is in a stopped state for a long time in the stationary ring seat, the polymer and impurities are deposited together, which has a good sealing effect.

Hualing Sealing Factory shares with you the advantages and benefits of hydraulic forming technology

1、 The advantages of hydraulic forming technology

Compared with traditional stamping processes, hydraulic forming technology has obvious technical and economic advantages in reducing weight, decreasing the number of parts and molds, improving stiffness and strength, and reducing production costs. It has been increasingly applied in the industrial field, especially in the automotive industry.

Reducing structural weight to save energy during operation is a goal pursued by people in the automotive industry, aviation, aerospace and other fields, and it is also one of the trends in the development of manufacturing technology. Hydraulic forming(hydroforming)It is a manufacturing technology aimed at achieving structural lightweighting.

Hydraulic forming is also known as“internal high-pressure forming”Its basic principle is to use the pipe as the blank, apply ultra-high pressure liquid inside the pipe, and apply axial thrust to both ends of the pipe blank for replenishment. Under the combined action of two external forces, the billet material undergoes plastic deformation and eventually adheres to the inner wall of the mold cavity, resulting in a hollow part that meets the technical requirements in both shape and accuracy.

2、 Advantages of Hydraulic Forming Technology

For hollow variable cross-section structural components, the traditional manufacturing process is to first press and form two halves, and then weld them into a whole, while hydraulic forming can form hollow structural components with varying cross-sections along the component in one go. Compared with stamping and welding processes, hydraulic forming technology and processes have the following main advantages:

　　1Reduce quality and save materials. For typical parts such as car engine mounts and radiator brackets, hydraulic formed parts are lighter than stamped parts20%～40%;For hollow stepped shaft components, it can reduce40%～50%The weight.

　　2Reduce the number of parts and molds, and lower mold costs. Hydraulic formed parts usually only require1Set molds, while stamping parts mostly require multiple sets of molds. The engine bracket parts formed by hydraulic pressure are6Reduce to1The radiator bracket components are made of17Reduce to10One.

　　3It can reduce the amount of welding required for subsequent mechanical processing and assembly. Taking the radiator bracket as an example, the heat dissipation area increases43%The solder joints are made of174Reduce to20One, the process consists of13Dao reduced to6Dao, productivity improvement66%.

　　4Improve strength and stiffness, especially fatigue strength, such as hydraulic formed radiator brackets, whose stiffness can be increased in the vertical direction39%The horizontal direction can be improved50%.

　　5Reduce production costs. According to statistical analysis of hydraulic forming parts that have been applied, the production cost of hydraulic forming parts is reduced on average compared to stamping parts15%～20%,Reduced mold costs20%～30%.

Pneumatic thin film regulating valves are widely used in the soda ash industry and can be used in conjunction with other instruments to achieve automatic adjustment and remote control of process parameters such as flow rate, liquid level, pressure, temperature, and other media such as liquids, gases, steam, etc. during the production process.

Flexible graphite material (graphite ring)

Scope of application: Various corrosive chemical liquids, strong bases, hydrochloric acid, sulfuric acid and other highly corrosive liquids, organic solvents, liquid oxygen, etc. Sealing of flanges, valves, reactors, and pumps used in industries such as petroleum, chemical, synthetic fiber, coal mining, power generation, and metallurgy.
Features: The ring can add metal wires and platinum metal according to user requirements.
Technical parameters: Temperature:-100℃~+800℃
Stress35MPa
Chemical resistance:PHvalue0-14

Temperature range:-60℃ (special to)-115℃）～204℃ (special to)260℃） Advantages:

· Excellent heat and cold resistance · Good electrical insulation · Excellent ozone resistance

graphite packingThere is not a single type, there are many different types. The purposes and standards of different types are different. It can be roughly divided into the following categories. There are three types of makeup: dense crystalline makeup, flake graphite, and cryptocrystalline graphite. In practice, these three types of graphite are widely used.

graphite packingThe application of graphite packing is quite extensive, and it can be said that it is very needed in many industries in the mechanical field. This is mainly because the inner graphite packing has the characteristics of high temperature and high pressure resistance, corrosion resistance, low temperature resistance, and good sealing. It is generally widely used in oil and gas media. Because oil and gas are generally at high temperatures and have strong corrosiveness, it is necessary to use some materials that are willing to be used, such as graphite packing.

Overall,graphite packingThe use of valves is still very significant, and it is commonly seen in valve applications because what valves require most is sealing.

graphite packingThe advantages of graphite packing cannot be described in words, they need to be experienced in practice. In short, if you choose graphite packing, it will not disappoint you.

Dacheng Hualing Sealing Factory shares with you the relevant knowledge of sealing:

influencesealing elementWhat are the external factors? The factors that the Hualing professional team has identified as external influences on seals are mostly derived from testing. These factors include sealing clearance, manufacturing accuracy (such as roundness, centrality, roundness, etc.), surface characteristics, reciprocating distance, and frequency. Their characteristics with pressure medialThe characteristic parameters of the production and installation, such as pressure, speed, working time, parking time, and temperature, are related.1.1Processing component surface The surface of the processed component has three significant deviations compared to the ideal profile: shape deviation, fluctuation deviation, and roughness deviation. The three appear in different combinations, and the use of elastic material seals that closely adhere to the surface can compensate for the shape deviation of the first two situations. And the third type of roughness deviation will inevitably cause increased wear. There is a strict requirement for the allowable roughness (wind or ruler) of the metal surface that matches the seal: static surface seal allowable rulerRValue between0.5to1.5Between Xiu; Sliding surface sealing ruler. The value cannot exceed0.25¨m.1.2Sealing gap The sealing gap of the static surface seal can be reduced to the sliding fit size. The sealing gap of sliding surface sealing is also a sliding gap, therefore, the size of the sealing gap should be determined according to different requirements to meet various industrial standards. The relative position between the gap and the seal should be adjusted properly, otherwise the bottom of the sealing ring is easily squeezed into the sealing gap. The solution is to use a protective retaining ring to prevent the sealing ring from being pressed into the gap.

rubber and plasticsealing elementAlthough small, its role makes it a fundamental component and accessory in major industries of the national economy such as defense, chemical industry, petroleum, coal, transportation, and machinery manufacturing, occupying a significant position in the development of the national economy. In recent years, with the rapid growth of the economy, the rubber seal manufacturing industry has maintained double-digit growth. The data shows2011In the year, the scale of China's rubber and plastic seal manufacturing industry(the above companies(According to * statistical caliber, sales revenue is2000over ten thousand yuan)Achieve a total industrial output value of nearly 10 billion yuan, with a year-on-year growth of over20%.

The sealing layout requirement is analyzed from the layout of the third-generation wheel hub bearing unit, which requires planning a sealing element between the non rotating outer ring and the rotating flange,sealing elementIt is necessary to maintain a certain gap with the steel ball, not only to prevent external pollutants from entering the bearing and prevent internal grease leakage, but also to prevent excessive torque and avoid excessive energy loss. Layout of third-generation wheel hub bearing unit2The layout and selection of third-generation wheel hub bearing unit seals are due to layout constraints and low-cost requirements.