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Someone asked what is the fluorine rubber O-ring? Maybe not, but it has a wide range of uses and is indispensable in people's life. As the name implies, fluorine rubber O-ring is an O-ring made of fluorine rubber. In short, it is an annular product made of fluorine rubber. So what exactly is the fluorine rubber O-ring used for? All friends who are familiar with industrial products know that it is widely used in automobiles, electronic products, aerospace, ships and so on. Now the social industry is also developing rapidly. With the progress of the times, the fluorine glue material is also constantly improved and innovated. The main characteristics of fluororubber are high temperature resistance, chemical corrosion resistance and good aging resistance. In very harsh environments, it still has good wear resistance. Even at temperatures below - 200 ℃, it can also allow a short period of operation without oil, which is a strong advantage of high temperature resistance. For example, the seals used for aircraft engines can be used for a long time at minus 250 degrees. Fluoroelastomer seals are the only ones that can be used under high vacuum conditions. The sealing performance of fluorine rubber O-ring is beyond doubt. Its sealing section is simple in structure, has the function of self sealing, and is safe and reliable in performance. It is also extremely simple to install and easy to replace. It has a good sealing effect on oil, water, air and gas, and can be used for sealing in unimaginable places. The industrial development cannot be separated from the fluorine rubber O-ring, especially the rubber products made of fluorine rubber O-ring are ubiquitous in life. Fluorine rubber O-ring can be seen everywhere in electrical products used by people, which shows its wide range of applications. In the future, there may be more places to use fluorine rubber O-ring.

The dust-proof ring is applied to the hydraulic pneumatic piston rod, which is mainly used to remove the dust attached to the outer surface of the piston cylinder block and prevent sand, water and pollutants from entering the sealed cylinder block. At present, most of the dust rings actually used are made of rubber materials. Their working characteristics are dry friction, which requires rubber materials to have particularly good wear resistance and low compression permanent deformation performance. In recent years, it has also gradually promoted the use of new dust seals with other materials and rubber materials, such as PTFE and O-ring combination, which has a good sealing effect. Long service life and increasingly extensive application. At present, there are more and more kinds of dust-proof rings, which can be divided into many types according to their functions, characteristics, structural types and sealing mechanisms. 1. Divided by structure: rectangular dust seal ring; Chamfer dust seal ring; Foot shaped dust seal ring; J-shaped dust seal ring; Triangular dust seal ring. 2. By function: single acting dust seal ring; Double acting dust seal ring. 3. According to whether there is skeleton: no skeleton dust seal ring; Framework type dust seal ring. 4. Classified by combination: single type dust seal ring; Combined dust seal ring. There is an oil film on the surface of the cylinder piston rod. Generally, there are always dust or sand particles in the use place of the oil cylinder, which will be brought into the oil cylinder if they are bonded with the oil film on the piston rod surface, and scratch the lip edge of the lip seal ring on the piston rod, or scratch the piston rod surface, which will cause medium leakage. Therefore, it is necessary to set a dust ring outside the piston rod seal ring near the end face of the cylinder barrel. The dust ring is installed in the groove. Since there is a certain amount of interference between the lip of the dust ring and the piston rod, the lip of the dust ring is close to the surface of the piston rod. When the piston rod moves to and fro, the dust and sand adhering to the surface of the piston rod will be removed by the dust ring. There is a certain clearance between the right section of the dust ring lip and the piston rod, which can reduce the friction resistance between the dust ring lip and the piston rod.

When the gap of the seal has relative motion, dust and sand in the working environment, etc. are adhered to the surface of the piston rod and brought into the cylinder with the reciprocating motion of the piston rod together with the oil film, becoming abrasive particles that invade the surface of the O-ring, accelerating the wear of the O-ring so that it loses its sealing properties. In order to avoid this situation, the dust ring must be used at the outstretched shaft end of the reciprocating seal. The roughness of the sliding surface is a direct factor affecting the friction and wear of the O-ring surface. Generally speaking, the surface is clean friction and wear is small, so the sliding surface roughness value is often very low (Ra0.2-.050μm). However, tests show that the surface roughness is too low (Ra less than 0.050μm) and will bring adverse effects on friction and wear. This is because a tiny surface dimple maintains the necessary lubricant film. Therefore the appropriate surface requirements have to be selected. The material of the sliding surface also has an effect on the life of the O-ring. The harder the sliding surface material, the higher the wear resistance and the ability to maintain the finish, the longer the life of the O-ring seal. This is also an important reason why the surface of the piston rod of a hydraulic cylinder is chrome plated. In dynamic sealing devices, friction and wear are important influencing factors of O-ring damage. The degree of wear depends mainly on the amount of friction. When the fluid pressure is tiny, the amount of O-ring friction depends on its pre-compression. The increase in friction force causes a lot of frictional heat between the rotating or reciprocating shaft and the O-ring seal. Since most O-rings are made of rubber, the thermal conductivity is extremely poor. Therefore, the frictional heat will cause the aging of the rubber, resulting in the failure of the O-ring and destroying its sealing performance. Friction can also cause damage to the surface of the O-ring and reduce the compression. Severe friction can quickly cause surface damage to the O-ring and loss of sealability.

Seal performance is stable, will not occur thermal expansion and contraction phenomenon, while having good elasticity and resilience, in many industries have applications, after using the seal for a long time, inevitably will appear on the mold, then how to remove these mold spots? Today we will give you a specific introduction. 1.Use vinegar. In the removal of mold on the seal, you can use daily vinegar. In the cleaning time, not only can clean the moldy seal, but also clean the inside of the machinery and equipment, to achieve the effect of both to get rid of mold, but also sterilization effect, so that the equipment is safer to use than before, this is also a seal manufacturer recommended to everyone a method. 2, the use of toothpaste. Toothpaste can also clean the mold of the seal, the first toothpaste applied to the seal moldy place, a few minutes, and then use a soft rag or towel, gently wipe, so do not use too much force, which is easy to make the seal deformation, resulting in sealing is not tight. After the wipe is complete, and then use water to rinse clean on it. 3, the use of bleaching powder. You can use diluted bleach to remove the mold on the seal. When using, according to the proportion required by the instructions, the bleach dilution, and then use a towel or rag to wipe clean. This will make the seal white and bright after the wipe is completed, and no odor.

The sealing ring is the most important and effective means to solve the leakage problem of hydraulic system. If the sealing ring of the hydraulic system is poor, the sealing ring may not be allowed to leak out, and the leaking oil will pollute the environment; It may also cause air to enter the oil absorption chamber, affecting the performance of the hydraulic pump and the stability of the movement of the hydraulic actuator. Therefore, the reasonable selection and design of the sealing ring device is very important in the design of the hydraulic system, the sealing ring device requirements are as follows: 1. The sealing ring should have good sealing performance in the working pressure and a certain temperature range, and can automatically improve the sealing performance with the increase of pressure. 2. The friction between the sealing ring device and the moving parts should be small, and the friction coefficient should be stable. 3. The sealing ring has strong corrosion resistance, not easy to age, long working life, good wear resistance, and can automatically compensate to a certain extent after wear. 4. Simple structure, easy to use and maintenance, so that the sealing ring has a longer life. Install Precautions Edit this paragraph 1. Clean the installation position; 2. Remove burrs during the installation and movement of seals; 3, smear lubricant on the seal; 4, protect the sealing surface from damage; 5. Check and confirm that the size of the seal is correct; 6. Use corresponding tools to install seals that need to be deformed.

First, installation of O ring (O rubber sealing ring) requirements Before installing the O-ring (rubber O-ring), check the following: 1. Whether the leading Angle is processed according to the drawing, whether the sharp edge is chamfered or rounded; 2. Whether the inner diameter is burr removed and there is no pollution on the surface; 3. Whether the seals and parts have been coated with grease or lubricating liquid (to ensure the medium compatibility of the elastomer, it is recommended to use the sealed liquid to lubricate); 4. Grease containing solid additives, such as molybdenum disulfide and zinc sulfide, shall not be used. Two, manually install O ring (O rubber sealing ring) : 1. Use tools without sharp edges; 2. Ensure that the O-ring (O-type rubber seal ring) is not twisted, and do not over-stretch the O-ring (O-type rubber seal ring); 3. Try to use auxiliary tools to install O-ring (O-rubber sealing ring), and ensure correct positioning; 4. For the O-ring (rubber O-ring) bonded by the sealing strip, do not stretch at the joint. Three, install screws, splines, etc 1. When the O-ring (O-rubber sealing ring) is stretched, it must be used for mounting mandels to pass screws, splines, keyways, etc. The mandrel may be made of soft, smooth metal or plastic and shall not have burrs or sharp edges. 2. When installing the pressing screws, tighten the screws symmetrically, not in the direction of the sequence.

The sealing ring is very important for many machinery industries and industrial industries. Only when the sealing ring reaches a certain level of precision can the overall process level and mechanical level be able to meet the requirements. Fluorine rubber O-rings are widely used in automobiles, aerospace, ships and other fields where product quality is very strict, so what are its specific scope of application? Below we will introduce it to you. First of all, the overall use of fluorine rubber O-rings is very extensive. Because of its good wear resistance, it can withstand high ambient temperature levels, and can maintain basic performance in various harsh working environments. , so the number of applicable industries is large, and the scope of application is also very wide. With the development of the industrial field in recent years, the materials of the products are constantly being innovated and upgraded, which can adapt to the basic use in more environments. Secondly, the fluorine rubber O-ring not only has the performance of high temperature resistance, but also has good elasticity and chemical corrosion resistance. In the industrial production environment, corrosion and invasion of various substances often occur, but due to The fluorine rubber O-ring has strong stability and excellent air tightness, making it especially suitable for various semiconductor and electronic information industries, and the overall application technology is very mature. Finally, the fluorine rubber O-ring also has good anti-aging performance, it can keep its own characteristics from being damaged in various harsh environments. In the high temperature environment below 200 degrees, the physical and chemical properties of fluororubber are very stable, and will not undergo chemical changes due to heat, and will not emit toxic substances. Based on this feature, it can be used normally in various temperature environments and has strong applicability.

A static seal usually refers to a seal between two stationary surfaces. The so-called static seal refers to a seal that is in a static state without relative motion during the operation of the bearing. A seal without relative motion between the sealing couplings is called a static seal. A seal without relative motion between the two couplings at the sealed part of the static seal is called a static seal. 1. The so-called static seal refers to the seal that is in a static state without relative motion during the operation of the bearing. The static seal basically uses an "O" type rubber seal in the oil film bearing. The specifications of different installation parts are also different, and the static seal is in the oil film bearing. The use of the above is generally distributed in: 1) The contact between the return ring and the bearing seat 2. The seal without relative motion between the seal couplings is called static seal. The seal with relative motion between the seal couplings is called dynamic seal. If the module does not have the characteristics of generalization and serialization, it is difficult to realize the system combination 3. The seals on construction machinery are divided into two categories: static seals and dynamic seals: the seals between the fixed surfaces are called static seals, such as construction machinery engine cylinder gaskets and various pipeline interface gaskets 4. Sealing device and anti-leakage measures on beverage production line 2.1 Static seal of beverage production line The sealing of the static part of the beverage production line is called static seal. A large number of static seals are used on the beverage production line, but different sealing forms are used in different occasions. 5. The seal between the relatively static joint surfaces is often called static seal. The doors, windows and orifices of the carriage are closed by closing the doors, windows, and orifice covers to make the sealing surfaces close to each other, contact or even embed them with the help of sealing strips. Eliminate gaps which are contact seals 6. Static seal means that the sealing part has no relative movement and is used to seal between fixed parts. Dynamic seal is used to seal between parts with relative movement. According to the characteristics of relative movement, dynamic seals are divided into reciprocating seals and rotary seals. seal 7. The seal between the relatively static mating surfaces is called a static seal. The seal between the relatively moving mating surfaces is called a dynamic seal. Static seals can be divided into: plane seals (axial seals) and cylindrical seals (radial seals), Leakage clearance is axial clearance and radial clearance respectively 8. The seal between two relatively static parts is called static seal, and the seal between two relatively moving parts is called dynamic seal. As long as the static seal selects the appropriate gasket material and type, and determines the pre-tightening force of the bolt, the ideal seal can be achieved Effect 9. The seal that does not have relative motion between the two coupling parts of the sealed part of the static seal is called static seal. The static seal can achieve leak-free sealing. The static seal uses O-rings, in addition to various gaskets, seals Although the static sealing of various gaskets is convenient and reliable, different degrees of leakage will sometimes occur when improperly used, such as plane static sealing with combined sealing washers and screw plugs.

1. Preparations and precautions before starting a. Comprehensively check whether the mechanical seal, as well as the installation of auxiliary devices and pipelines are complete, and whether they meet the technical requirements. b. Before starting the mechanical seal, perform a static pressure test to check whether there is leakage of the mechanical seal. If there are too many leaks, the cause should be found out and tried to eliminate. If the Dongguan oil seal is still invalid, it should be disassembled, checked and reinstalled. The general static pressure test pressure is 2~3 kg/cm². c. Press the pump to turn the steering wheel to check whether it is light and even. If the cranking is difficult or does not move, check whether the assembly size is wrong and whether the installation is reasonable. 2. Installation and shutdown a. The sealed cavity should be kept filled with liquid before starting. When conveying solidified media, the sealed cavity should be heated with steam to melt the media. The crank must be cranked before starting to prevent the soft ring from breaking due to sudden start. b. For the mechanical seal using the pump external sealing oil system, the Dongguan oil sealing system should be started first. Finally stop the oil sealing system after parking. c. After the hot oil pump is out of operation, the cooling water in the sealing oil cavity and the end face seal cannot be stopped immediately. The cooling water can only be stopped when the oil temperature at the end face seal drops below 80 degrees, so as to avoid damage to the sealing parts. 3. Operation a. If there is slight leakage after the pump is started, observe it for a period of time. If the leakage is still not reduced after continuous operation for 4 hours, the pump should be stopped for inspection. b. The operating pressure of the pump should be stable, and the pressure fluctuation should not be greater than 1 kg/cm2. c. During the operation of the pump, the oil seal should avoid the phenomenon of evacuation, so as to avoid dry friction of the sealing surface and seal damage. d. The sealing condition should be checked frequently. During operation, when the leakage exceeds the standard, the heavy oil is not more than 5 drops/min, and the light oil is not more than 10/min. If there is no improvement trend within 2-3 days, the pump should be stopped to check the sealing device.

For the compression amount of the O-ring, one is that it is only compressed radially in the non-working state, and its compression is 8% to 13%, and the other is that it is compressed both radially and axially in the non-working state, and its compression 4% to 5%. For sealing rings of other materials, the optimum compression should be obtained by testing. Of course, it is related to the hardness of the sealing ring. The higher the hardness, the smaller the compression. Therefore, the O-ring sealing ring is mainly designed with the customer to find a more reasonable hardness. O-rings have coefficients of friction ranging from just under 0.25 to over 0.75. The coefficient of friction can be reduced by surface treatment or by adding molybdenum disulfide to the O-ring. If molybdenum disulfide is used, this characteristic becomes a long-term constant characteristic of the O-ring, and the effect of the surface treatment diminishes over time. O-ring is a kind of sealing element with a circular cross-section. It is widely used in a variety of mechanical equipment. It plays a sealing role in a certain temperature, pressure and different liquid or gas media. The O-ring is similar to other sealing rings. It has the following five advantages: simple structure of O-ring sealing part, compact installation part and light weight. It has a self-sealing effect, and the sealing effect can be achieved with one seal. Good sealing performance, almost no leakage when used as a fixed seal, and some leakage only at high speeds when used as a moving seal. The frictional resistance of the O-ring movement is very small, and it can also adapt to the occasion of alternating pressure. O-ring dimensions and grooves are standardized, low cost, and easy to use and outsource. Compared with other sealing rings, O-rings also have the following three problems that need to be paid attention to: the frictional resistance when starting is large. When used as a seal for pneumatic devices, lubricating oil must be added to prevent wear. The processing size and precision of coupling accessories, such as moving surfaces, grooves, and gaps, are very strict. When installing the O-ring into the groove, be careful not to twist it. When installing, you can consider coating the groove and the O-ring with sealing medium. Try not to open the original packaging of the O-ring when it is not in use. Dust attached to the O-ring or mixed with foreign objects may cause damage, and it should be avoided as far as possible from direct sunlight or placed near a high temperature heat source such as a boiler to prevent the O-ring from aging. and lip damage. Special attention should be paid to the occasional discoloration during storage, that is, white powder on the surface of the O-ring, which will not adversely affect the function.

O-rings are prone to failure due to improper use of daily work and other factors, such as overheating of the rubber ring. The failure of the O-ring will not only delay the daily operation, but also waste manpower and material resources and cause losses. Therefore, you must be familiar with the solutions for different situations. 1. Overheating of the O-ring: If the O-ring is overheated, check the sealing chamber of the centrifugal pump and its cooling device as soon as possible. This inspection is mainly to check whether there is any blockage in the equipment. If there is a blockage, it should be cleaned up in time. 2. Improper selection of O-ring overheating specifications: Improper selection of O-ring will lead to permanent deformation, affecting use, not only causing the O-ring to lose its original performance and break, but also prevent the sliding parts from moving. So choose carefully and match. 3. O-ring extrusion: O-ring sometimes has a small space, and when the space is small, extrusion will occur. At this time, all parts of the O-ring should be adjusted immediately to improve the narrow space. 4. O-ring compression set: Another indicator for evaluating the sealing performance of O-ring is the compression set of the selected material. Under the action of pressure, the O-ring, which is an elastic element, produces elastic deformation, and as the pressure increases, permanent plastic deformation also occurs. 5. The hardness of the O-ring: The hardness of the O-ring material is the most important indicator for evaluating the sealing performance. The hardness of the O-ring determines the amount of compression of the O-ring and the maximum allowable extrusion gap of the groove.

Teflon (PTFE) is a sealing material with better chemical resistance and good heat resistance than perfluoroelastomer. It can be used in most chemical fluids, solvents, hydraulic oils and lubricating oils. The compression set) is very small, so it can exert the sealing performance for a long time, and HiPerSeal uses various special springs to overcome the elastic problem of Teflon or other high-performance rubber and plastics, and develops a replacement for the vast majority of applications in static or dynamic (reciprocating or Rotary motion) seals, the temperature range can be from refrigerant to 300℃, the pressure can be from vacuum to ultra-high pressure 700kg/cm, the moving speed can be as high as 20m/s, and the spring can choose stainless steel, Elgiloy Hastelloy, etc. Therefore, it can be used in various high temperature corrosive fluid occasions. Pan plug seals can be made according to AS 568A standard O-ring grooves (such as radial shaft seals, piston seals, axial face seals, etc.), and completely replace the general O-ring. Because there is no swelling problem, it can be used for a long time. Maintain good sealing performance. For example, for mechanical shaft seals used in high-temperature corrosive environments in petrochemical processes, the most common cause of leakage is not only the uneven wear of the sliding ring, but also the deterioration and damage of the O-ring. The use of HiPerSeal can completely improve rubber softening, swelling, surface Roughening, wear and other problems, thus greatly improving the service life of the mechanical shaft seal. In addition to the above-mentioned sealing applications in high temperature and corrosive environments, it has low friction coefficient of sealing lip, stable sealing contact pressure, high pressure resistance, and large radial run-out. And the groove size error, it is very suitable for the seal of the air hydraulic cylinder, replacing the U-shaped or V-shaped tightening to obtain excellent sealing performance and service life.

O-rings are suitable for being installed on various mechanical equipment, under the specified temperature, pressure, and different liquid and gaseous media, to play a sealing role in static or moving states. Various types of seals are widely used in machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, construction machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instruments and meters. element. O-rings are mainly used for static sealing and reciprocating sealing. When used for rotary motion seals, it is limited to low-speed rotary seals. The O-ring is generally installed in the groove with a rectangular cross-section on the outer or inner circle to play a sealing role. O-rings still play a good role in sealing and shock absorption in environments such as oil resistance, acid and alkali resistance, grinding, and chemical erosion. Therefore, O-rings are the most widely used seals in hydraulic and pneumatic transmission systems.

In addition to the general requirements for the material of the sealing ring, the sealing ring should also pay attention to the following conditions: (1) Elasticity and resilience; (2) Appropriate mechanical strength, including expansion strength, elongation and tear strength, etc. (3) The performance is stable, it is not easy to swell in the medium, and the thermal shrinkage effect (Joule effect) is small. (4) It is easy to process and form, and can maintain precise dimensions. (5) Does not corrode the contact surface, does not pollute the medium, etc. The most suitable and most commonly used material to meet the above requirements is rubber, so most of the sealing rings are made of rubber materials. There are many varieties of rubber, and new varieties of rubber appear constantly. When designing and selecting, you should understand the characteristics of various rubbers and choose them reasonably. 1. The sealing ring should have good sealing performance within the working pressure and a certain temperature range, and can automatically improve the sealing performance with the increase of pressure. 2. The friction between the sealing ring device and the moving parts should be small, and the friction coefficient should be stable. 3. The sealing ring has strong corrosion resistance, not easy to age, long working life, good wear resistance, and can automatically compensate to a certain extent after wear. 4. The structure is simple, the use and maintenance are convenient, and the sealing ring has a longer life.

Automobile oil seal is a mechanical component used to seal grease (oil is a very common liquid substance in the transmission system, and also generally refers to a general liquid substance). Lubricating oil leaks. What is the function of the car oil seal? 1. Prevent sediment, dust, moisture, etc. from intruding into the bearing from the outside; 2. Limit the leakage of lubricating oil in the bearing. The requirements for the oil seal are that the size (inner diameter, outer diameter and thickness) should meet the regulations; appropriate elasticity is required, which can properly clamp the shaft and play a sealing role; it must be heat-resistant, wear-resistant, strong, and resistant to media ( oil or water, etc.), long service life. Reasonable use of oil seals, should pay attention to the following points: (1) Shaft speed Due to design and structural reasons, high-speed shafts should use high-speed oil seals, low-speed shafts should use low-speed oil seals, and low-speed oil seals cannot be used on high-speed shafts, and vice versa. (2) When the ambient temperature is high, polyacrylate or silicon, fluorine, and silicon fluorine rubber should be selected. And should try to lower the oil temperature in the tank. When the operating temperature is too low, cold-resistant rubber should be used. (3) The oil seal with general pressure has poor pressure bearing capacity, and the oil seal will be deformed when the pressure is too large. Under the condition of excessive pressure, a pressure-resistant bearing ring or a reinforced pressure-resistant oil seal should be used. (4) The degree of eccentricity on the installation If the eccentricity of the oil seal and the shaft is too large, the sealing performance will be deteriorated, especially when the shaft speed is high. If the eccentricity is too large, a "W"-shaped oil seal can be used. (5) The surface finish of the shaft directly affects the service life of the oil seal, that is, the higher the shaft finish, the longer the service life of the oil seal.

The skeleton oil seal is a typical representative of the oil seal. Generally speaking, the oil seal refers to the skeleton oil seal. The effect of the oil seal is generally to block the parts that need to be lubricated in the transmission parts from the output parts, so as to prevent the leakage of lubricating oil. The skeleton is like the steel bar inside the concrete member, which has the effect of strengthening and enables the oil seal to maintain its shape and tension. According to the structure method, it can be divided into single lip skeleton oil seal and double lip skeleton oil seal. The auxiliary lip of the double-lip skeleton oil seal has a dust-proof effect to prevent external dust and impurities from entering the machine. According to the skeleton type, it can be divided into inner skeleton oil seal, exposed skeleton oil seal and equipment oil seal. According to the working conditions, it can be divided into rotary skeleton oil seal and reciprocating skeleton oil seal. Different categories are distinguished according to different types. The first thing to talk about today is the skeleton oil seal. The skeleton oil seal structure consists of three parts: the oil seal body, the reinforcing skeleton and the self-tightening coil spring. The sealing body is divided into bottom, waist, cutting edge and sealing lip according to different parts. Generally, the inner diameter of the skeleton oil seal under free conditions is smaller than the shaft diameter, that is, it has a certain "interference". Therefore, after the oil seal is installed on the oil seal seat and the shaft, the pressure of the oil seal edge and the shortening force of the self-tightening coil spring generate a certain radial tightening force on the shaft. After a period of operation, the pressure will rapidly decrease or even disappear, so adding a spring can compensate for the self-tightening force of the oil seal at any time. Therefore, when installing, it is necessary to apply some oil on the sealing ring to ensure that the skeleton oil seal and the shaft center line are straight. If it is not straight, the sealing lip of the oil seal will drain the lubricating oil from the shaft, which will also cause the sealing lip to be damaged. Excessive wear. During operation, the lubricant in the housing oozes out a little to reach a condition where an oil film is formed at the sealing surface.

Common hydraulic seals for hydraulic cylinders are of the following types: dust seals, piston rod seals, buffer seals, guide support rings, end cap seals, and piston seals. Hydraulic cylinder is an energy conversion hydraulic actuator that converts hydraulic energy into linear motion mechanical work. Before installation, the surface quality of the seal should be checked first, and the geometric size and accuracy of the seal should meet the standard requirements. Guohao has sorted out the method of installing hydraulic cylinder seals: Before installation, the surface quality of the seal should be checked first, and there should be no flash, burr, crack, or cut edge. For defects such as pores and porosity, the geometric size and accuracy of the seal must meet the standard requirements. The combined sealing ring for the hole consists of an O-ring and a wear-resistant ring: Due to the high elasticity of the O-ring, the installation is relatively easy; while the wear-resistant ring has poor elasticity, if it is directly installed, the steps and grooves of the piston will easily scratch the sealing surface and affect the sealing effect. In order to ensure that the wear ring is not damaged during installation, certain installation measures should be taken. The wear-resistant ring is mainly made of filled polytetrafluoroethylene (PTFE) material, which has the characteristics of corrosion resistance and a large thermal expansion coefficient. Therefore, it is soaked in oil at 100 ° C for 20 minutes before installation to gradually soften it. Then install it into the groove of the piston with the tool shown in Figure 2. The tooling consists of a positioning sleeve and an expansion sleeve. The head of the locating sleeve has a 5o chamfer to guide the O-ring and wear ring into the groove on the end of the piston. The expansion sleeve is made of 65 Mn steel with better elasticity after heat treatment, and is processed into a uniform and symmetrical 8-lobed structure. It should be noted that when processing the small holes at the bottom of each lobe, the indexing should be uniform. When milling each lobe, the saw edge should be aligned with the center of the small hole to ensure that each lobe of the expansion sleeve can be opened evenly. At the same time, all parts should be chamfered (smoothly) to avoid damage to the sealing ring. Each type of sealing ring should have a set of corresponding tooling to ensure its assembly requirements. After the installation is completed, the sealing ring is not allowed to be wrinkled, twisted, scratched or reversely installed. The picture shows the cylinder of the hydraulic cylinder. The threaded holes on the cylinder are usually arranged after the welding process, so that burrs are inevitably generated at the junction between the outlet of the threaded hole and the inner wall of the cylinder. In order to remove burrs, special tools must be designed and manufactured to process them to achieve the purpose of smooth transition. Structure of special tool. When using, insert the shank from the threaded hole first, then install the cutter head on the shank from the side, and rotate the shank to remove the burrs and process a smooth and complete surface. Guohao seal ring - a solution provider for personalized solutions to "oil seals in various scenarios", more than 20 years of experience in seal material research and development, excellent seal design capabilities and experience in seal integration solutions, welcome to communicate.

The following points need to be paid attention to when using the sealing ring: 1. Purchasing sealing rings: choose reputable brands or long-term cooperative suppliers and supply channels to ensure that the product quality can be well checked and maintain a stable quality level. 2. Storage: The storage temperature of the sealing ring is preferably below 30 degrees Celsius to avoid high temperature aging of the sealing ring. The sealing ring must be stored in a sealed package to avoid contact with moisture or dust in the air. The sealing ring must avoid strong light exposure to avoid the seals being eroded by ozone in the air or prematurely aging. Therefore, it is recommended that users must check whether the sealing ring is properly stored and whether it has exceeded the shelf life when choosing a supplier or purchasing from a sealing ring store. Otherwise, no matter how high-quality sealing rings can be provided by the sealing ring manufacturer, it may only be the discarded sealing rings that are delivered to the user. 3. Design: While using high-quality sealing rings, many users choose unsuitable products in other aspects such as guidance and dust prevention in order to reduce costs. This results in problems such as leaks or leaks. 4. Installation: When installing the sealing ring, the most important thing is to avoid damage to the sealing ring. The right finish, safe chamfering, deburring, and the right tools. In the process of installation, dust should also be avoided on the surface of the sealing ring, and how to properly place the sealing ring after it is installed to avoid damage to the sealing ring and clean hydraulic medium. 5. Use: In many cases, after the supporting user completes the process, even if the equipment has passed the test, there will still be problems after it is delivered to the user for a period of time. In general, it may be due to improper selection of the sealing ring, or it may be caused by improper use. For example, the oil temperature is too high, causing the sealing ring to burn out. It can check whether the cooling system is operating normally, whether the surface of the piston rod is worn and leaking, whether there is debris in the hydraulic oil, whether the filter is invalid, etc.

The difference between PTFE single-lip oil seal and double-lip oil seal is as follows: 1. Structure: The PTFE single-lip skeleton oil seal has only a single sealing lip, and the double-lip oil seal has two lips of sealing and dustproof. Both oil seals are made of PTFE material, which has good wear resistance and corrosion resistance, and has a long service life. 2. Use environment: PTFE single lip oil seals are mainly used in environments with no or little dust and impurities, such as indoors or in oil tanks. For example: A-type single-lip oil seal, the speed is up to 30m/s, the filling rate is better, and the PTFE double-lip skeleton oil seal can be used in the working environment with dust and impurities. The dust lip can prevent dust and impurities from entering the cavity, so as not to damage the sealing lip and make the sealing lip lose its sealing effect. Such as type B oil seal, high force up to 30bar, suitable for high pressure environment

Dimensioning of O-rings: Only the inner diameter and wire diameter are marked. According to the standard, the wire diameter is: 1.8, 2.65, 3.55, 5.3, 7 (because the standard is made in imperial units, so the metric units are replaced with decimals) There are many inner diameter specifications, usually relying on the standard. In actual use, the inner diameter of the O-ring has little effect, and can be selected according to the standard size and assembly relationship. For example, the inner diameter of the O-ring installed on the shaft shoulder can be smaller, and the assembly is tightened on the shaft and is not easy to slip out. The inner diameter of the O-ring installed in the hole can be appropriately larger, and it is easy to rise on the outer diameter during assembly, and it is not easy to be squeezed. The groove size of the O-ring is the most critical. It is necessary to ensure that the O-ring has sufficient pre-compression and space for expansion and contraction in another direction.