Oil seal is used to seal the mechanical equipment in the rotary shaft seal oil seal components, and the cavity is basically static, so the oil seal, also known as rotary shaft lip ring.
The mechanical frictional part is used to prevent oil and chemical leachings from leaking from the outside in addition to the oil, in order to prevent the oil from leaking from the mechanical gap due to oil entry during mechanical operation. Time should also use the oil seal seal state, Oil Seals one oil seal between the outer edge and the cavity for the static seal, while ensuring the outer edge of the oil seal between the reliable positioning of the cavity.
Second, the seal between the seal and the shaft seal state, when the shaft rotation for the dynamic seal, when the shaft is static when the static seal. Oil Seals The combination of various factors and their interaction, both on the sealing performance and service life had a great impact.
Second, the main use of oil seal
Used for engine crankshafts and camshafts Sealed forklifts such as cars, motorcycles and commercial vehicles, such as gearboxes, wheels, axles, differentials, and other agricultural machinery and construction machinery transmission systems Sealed, industrial gearbox sealed hydraulic components (pumps, motors) sealed daily mechanical washing machine seal, Oil Seals widely used in mechanical engineering and equipment processing industry
Third, the main features of the oil seal The external seal for the cavity to ensure the static seal on the cavity - the use of inner rubber frame of the rubber outer edge; the use of exposed metal skeleton of the outer edge, most need to polish and plating anti-corrosion coating. Oil Seals The spring-loaded seal lip ensures the reliability of the dynamic and static sealing of the shaft. After a long-term development study results, the seal of the seal lip structure to improve the performance to improve the reliability of the wider range of the seal, add a chuck, or in special circumstances to use a number of dust , To prevent external pollutants and dust intrusion.
The role of various parts of the oil seal
Oil seal mainly by the sealing body, strengthen the skeleton and self-tightening coil spring and other parts. Seal body according to different parts are divided into the bottom, waist, Oil Seals edge and sealing lip and so on.
The metal skeleton acts as a reinforcement in the concrete component, and strengthens the seal and keeps the seal in shape and tension. Usually, in the free state of the skeleton oil seal, its diameter than the shaft diameter is small, that has a certain "interference". Therefore, when the oil seal is inserted into the oil seal seat and the shaft, the pressure of the oil seal edge and the shrinkage force of the self-tightening coil spring produce a certain radial force on the shaft. After a period of operation, the pressure will decrease or even disappear , Oil Seals So that the spring can be compensated at any time with the oil seal from the tight, the outer edge of the oil seal so that the oil seal in the cavity hole at the same time, to prevent the fluid from the outer surface of the oil seal and the surface of the contact surface between the leakage and invasion of the role. In addition the metal skeleton is when the oil seal is fixed in the cavity, from the role of maintaining the force. Oil Seals The sealing lip is a flexible elastomer which is designed to maintain a stable sealing effect under the influence of mechanical vibration and pressure fluctuations of the sealed fluid and to maintain a stable contact between the lip and the shaft surface. The spring can increase the clamping force of the seal lip to the shaft, thereby maintaining the effect of this pressing force. The lip end is formed in an oblique shape and presses the shaft surface at the end to act as a sealing fluid.
The dust lips are not connected with the spring of the vice lips, Oil Seals to prevent the role of dust intrusion.