Technical News

We WONEPART will share technical news for our manufacture products, such as excavators and parts drawing, seal product drawing, pump and parts drawing, engine and parts drawing, hydraulic hammer drawing so that customer could know our product details. As there are thousands of materials, therefore, we will show some special one for your reference.

  • Fluorosilicone rubber is a kind of hot-vulcanized special silicone rubber. Because its matrix polymer is silicone rubber containing trifluoropropyl group, it combines the advantages of silicone rubber and fluorine rubber: that is, it has good low temperature performance and insulation of silicone rubber. Performance, high temperature performance, easy processing and weather resistance, but also has low permeability, flame retardancy, good physical and mechanical properties and chemical stability similar to fluororubber, such as solvent resistance, oil resistance, oil and gas resistance, and suitable for various It is widely used in the fields of aviation industry, petroleum industry, automobile industry, chemical industry, etc. because of the harsh high and low temperature resistance fuel and lubricant resistance occasions. As a kind of sealing protection products, fluorosilicone rubber is suitable for use in aerospace, automobile, electromechanical, electronic, machinery and construction fields. It can be used in kerosene and steam at -55℃~220℃ and open flame at 150℃. And continue to use in harsh environments such as stress, temperature resistance, oil resistance, and ozone resistance when the strength is greater than 100KG. Below, the characteristics of our fluorosilicone rubber are introduced in detail.Fluorosilicone rubber is a kind of hot-vulcanized special silicone rubber. Because its matrix polymer is silicone rubber containing trifluoropropyl group, it combines the advantages of silicone rubber and fluorine rubber: that is, it has good low temperature performance and insulation of silicone rubber. Performance, high temperature performance, easy processing and weather resistance, but also has low permeability, flame retardancy, good physical and mechanical properties and chemical stability similar to fluororubber, such as solvent resistance, oil resistance, oil and gas resistance, and suitable for various It is widely used in the fields of aviation industry, petroleum industry, automobile industry, chemical industry, etc. because of the harsh high and low temperature resistance fuel and lubricant resistance occasions. As a kind of sealing protection products, fluorosilicone rubber is suitable for use in aerospace, automobile, electromechanical, electronic, machinery and construction fields. It can be used in kerosene and steam at -55℃~220℃ and open flame at 150℃. And continue to use in harsh environments such as stress, temperature resistance, oil resistance, and ozone resistance when the strength is greater than 100KG. Below, the characteristics of our fluorosilicone rubber are introduced in detail. Important characteristics of fluorosilicone rubber 1. Weather resistance, oil resistance, solvent resistance, and chemical resistance The main chain of fluorosilicone rubber is a Si-O bond structure, which is a saturated chain, so it has excellent air aging resistance. Its rubber test piece can still maintain good elasticity after five years of outdoor exposure test; after up to 10 years, Under ultraviolet light and harsh weather conditions, its physical properties have only minor changes. The tensile strength and elongation at break of samples placed in different locations have decreased by less than 25%. Compared with methyl vinyl silicone rubber, fluorosilicone rubber has excellent oil resistance, solvent resistance, and chemical resistance; even when compared with fluororubber, it has good oil and solvent resistance. After immersing in the same medium, temperature and time, it shows excellent durability. Fluorosilicone rubber has better resistance to methanol-containing gasoline. Even in a gasoline/methanol mixture, the hardness, tensile strength, and volume change of the vulcanized rubber are very small. After a long-term immersion test for 500 hours, the physical properties are also almost no change at all. 2. Heat resistance Compared with fluororubber, fluorosilicone rubber has excellent heat aging resistance, especially the retention rate of physical properties at high temperature. Compared with silicone rubber, fluorosilicone rubber reduces the heat resistance of fluorosilicone rubber to a certain extent due to the presence of trifluoropropyl group. The reason is that trifluoropropyl group is easily thermally decomposed, and the decomposition produces highly acidic compounds that accelerate fluorine. Thermal aging reaction of silicone rubber. The high temperature decomposition of fluorosilicone rubber is the same as that of silicone rubber, namely: side chain oxidation, main chain rupture, side chain thermal decomposition and various compound reactions. Since the decomposition products can also cause the main chain to break, the heat resistance is usually worse than that of silicone rubber, and it has begun to oxidize and age at a temperature of 200°C. Temperature has greater influence on fluorosilicone rubber than silicone rubber, but less than fluoroelastomer. Foreign countries have also studied the service life of fluorosilicone rubber at 150℃×2000h, 175℃×5000h, and 200℃×4000h. The result is second only to methyl vinyl silicone rubber. 3. Low temperature performance Like ordinary silicone rubber, fluorosilicone rubber has good low temperature performance. Since fluorosilicone rubber is a linear polymer composed of soft Si-O as the main chain, its low temperature characteristics are better than those of fluoroelastomers with C-C as the main chain. First of all, the molecular backbone of fluorosilicone rubber is relatively flexible, giving it excellent cold resistance. Secondly, the molecular chain of fluorosilicone rubber is in a helical configuration. The flexibility of the molecular chain is greater than that of the CC bond or the Si-C bond. The interaction force between the molecular chains is weak. These structural features make it soft and elastic. When it changes, the intermolecular force changes very little, so its various properties, especially elasticity, change little, making it have low-temperature performance that other rubbers can’t match. Third, the presence of trifluoropropyl substituted methyl can destroy the regularity of the polydimethylsiloxane molecular chain, reduce the crystallization temperature and degree of crystallization of the polymer, and make fluorosilicone rubber have a better low temperature than silicone rubber Sex. Therefore, fluorosilicone rubber still has elasticity at a low temperature of -60°C to -70°C, and can be used for a long time at -60°C. 4. Electrical insulation and radiation resistance The electrical performance of fluorosilicone rubber is similar to that of ordinary silicone rubber. Except for high frequency and high voltage electrical environment, its electrical insulation performance can reach the use level. The electrical insulation performance changes little under severe conditions such as high temperature, low temperature, humidity, oil, solvent, chemicals, ozone, etc. The radiation resistance of fluorosilicone rubber is not outstanding, but the radiation aging resistance is better than that of methyl vinyl silicone rubber. 5. Physical and mechanical properties Like ordinary silicone rubber, fluorosilicone rubber has relatively low mechanical strength (especially tear strength). Our company can customize and process fluorine-silicon special-shaped parts, O-rings, gaskets, gaskets, oil seals, etc. according to requirements. After customer experiments, the effect is excellent. Welcome customers in related industries to exchange and consult, and request samples for testing.

  • O-ring is a sealing element with a circular cross-section. In the mid-nineteenth century, some people used O-rings made of cast iron as the seals for steam engine cylinders. Later, natural rubber was used for faucets. With the development of rubber production, O-rings are currently made of synthetic rubber. Practice has proved that the sealing performance of the O-ring is very good, so it is used in equipment from airplanes to general hydraulic and pneumatic equipment. In this page, we will introduce the function of O ring in did

  • An engine is a machine that can convert other forms of energy into mechanical energy, including, for example, an internal combustion engine (gasoline engine, etc.), an external combustion engine (Stirling engine, steam engine, etc.), an electric motor, and the like. For example, internal combustion engines usually convert chemical energy into mechanical energy. There are many cases happen to engine, for wonepart we have experience of engine repair and rebuild projects, if your engine have the following problems, then you will check the following reasons as reference: 1. When the start switch is engaged, the engine crankshaft will not rotate Possible reason • Battery output is too low • Defective wire or switch • The electromagnetic switch of the starting motor is faulty • The starting motor is faulty • Intrinsic problems affecting the rotation of the engine crankshaft 2. Start the motor crank, but the engine cannot start Possible reason • No fuel in the fuel tank • Poor fuel quality • The fuel filter is dirty • The fuel pipe is dirty or damaged • Low fuel pressure • There is air in the fuel system • The fuel system and engine are not at the correct timing • The exhaust valve is always open (the fuel does not have high enough pressure to start the engine) • Turning speed is too low • No fuel in the fuel injection pump housing

  • Here-comes-the-bearing-disassembly-non-destructive-disassembly-any-bearing-can-be-dismantled-like-this! There is all kinds of hydraulic pump and parts, engine and parts need to use bearing, and we could supply all kinds of bearing for you. However, when you have problems, how to dismantle in non-destructive way.Reasonable disassembly of the bearing in the case of interference fit is the core of bearing disassembly technology. When the disassembly force is so large that it cannot be dismantled by ordinary methods, and the disassembly force produced by conventional methods is likely to damage the bearing, an oil hole is generally designed at the end of the shaft, the oil hole extends to the bearing position and then penetrates radially to the shaft surface An annular groove is added, and a hydraulic pump is used to pressurize the inner ring to expand the inner ring during disassembly to reduce the disassembly force. For small bearings mounted on adapter sleeves with straight shafts, a hammer can be used to remove small steel blocks that evenly act on the end face of the bearing inner ring (Figure 7). For bearings mounted on adapter sleeves with stepped shafts, the use of hydraulic nuts can make bearing removal easier. After the bearing has been running for a period of time, there will inevitably be needs for maintenance or damage replacement. In the early development of the machinery industry, the popularity of professional knowledge was insufficient, and the awareness of safe operating procedures was insufficient. Today we will only talk about the disassembly of bearings .

  • Working principle of hydraulic sequence valve from wonepart The sequence valve is a pressure valve used when a hydraulic pump needs to supply two or more hydraulic actuators to operate in a certain sequence. The control pressure can be its own pressure or external oil pressure. Its structure and operating principle are very similar to the relief valve, and the difference is that the outlet of the sequence valve is directly connected to the actuator, and there is a special drain port. Any hydraulic pump parts or hydraulic valve we have, but we focus on kawasaki pump and parts and valves.

  • Excavator engine burning oil refers to the fact that the oil loss during the excavator operation is higher than that of the same type and the same type of excavator oil, and the operation is accompanied by the phenomenon of blue and black smoke. Excavator engine burning oil is one of the more serious faults in the engine failure of excavator. Let's understand the reasons and solutions for the burning of excavator oil: The breakdown of excavator burning oil failure classification: a large amount of blue smoke is emitted at startup; a large amount of blue smoke is emitted when refueling; A large amount of blue smoke is emitted from the oil filling port; the consumption exceeds the normal requirement.

  • Do you know the functions of the sensors and solenoid valves on the excavator? For environmental protection, excavators are now mostly EFI vehicles. Diggers often encounter various alarm codes, and these alarms are mostly caused by sensor or solenoid valve failures. Here are the ten sensor and solenoid valve positions and functions on the engine.If you are looking for engine parts, pls visit our online website http://www.wonepart.com/product-list/engine, you could find many items, and if you could not find pls email us info@wonepart.com.

  • What should I do if the hydraulic pump or hydraulic valve system runs slowly and under speeds? The hydraulic system runs slowly, which is often referred to as under speed. Under speed does not work, but fails to meet the system requirements, so troubleshooting is difficult and there are many situations. The following summarizes the two situations and specific causes of hydraulic system under speed for your reference.

  • A throttle is a valve that controls the flow of fluid by changing the throttle cross section or throttle length. The throttle valve does not have a negative flow feedback function, and cannot compensate for the speed instability caused by load changes. Generally, it is only used in situations where the load changes little or the speed stability is not high. The external structure of the throttle valve is not different from that of the shut-off valve, except that the shapes of their opening and closing parts are different. The opening and closing parts of the throttle valve are mostly conical streamlined, which can adjust the flow rate and pressure by changing the cross-sectional area of the channel. Throttle valve is used to reduce the pressure of the medium under the condition of extreme pressure drop. The flow rate of the medium between the throttle disc and the valve seat is so large that the surface of these parts is quickly damaged-the so-called cavitation phenomenon. In order to minimize the effects of cavitation, the valve disc is made of a cavitation resistant material (made of alloy steel) and is made into a streamlined cone with a tip angle of 140 to 180. This also allows the valve disc to have a larger opening height, which is generally not recommended. Throttle under small crevices.

  • The working principle of various electromagnetic reversing valves makes you a hydraulic master Dynamic diagram demonstration of the working principle of hydraulic valve, let you understand instantly! Hydraulic valve is an automatic component operated with pressure oil, but how does it work? What's the use? After carefully reading these 20 visual animations, you will understand! First of all, we need to know the types of hydraulic valves: Classification by control method: manual, electronic, hydraulic; Classification by function: flow valve (throttle valve, speed control valve, diverter manifold), pressure valve (overflow Valve, pressure reducing valve, sequence valve, unloading valve), directional valve (electromagnetic directional valve, manual directional valve, check valve, hydraulic control check valve); Classification by installation method: plate valve, tube valve, Superimposed valve, threaded cartridge valve, cover valve; classified by operating method: manual valve, motorized valve, electric valve, hydraulic valve, electro-hydraulic valve, etc.

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