What is a mechanical seal? What is a skeleton oil seal? How many types of gaskets are there?

The mechanical seal is a device used to solve the sealing between the rotating shaft and the body. It is a device that prevents fluid leakage by keeping at least a pair of end faces perpendicular to the rotation axis under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of auxiliary seals to keep fit and slide relatively. It is often used in pumps and compressors. , Rotary fluid machinery such as mechanical seal stirring tank for reaction pump, and also used for sealing of gearbox, valve, rotary joint, ship tail shaft, etc.

The skeleton oil seal is a typical representative of the oil seal. Generally speaking, the oil seal refers to the skeleton oil seal. The function of the oil seal is generally to isolate the parts that need to be lubricated in the transmission parts of the kettle mechanical seal from the output parts, so as not to allow the leakage of lubricating oil. The skeleton is like the steel bars in the concrete member, which acts as a reinforcement and enables the oil seal to maintain its shape and tension. According to the structure, 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 plays a dust-proof role 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 assembled oil seal. According to working conditions, it can be divided into rotary skeleton oil seal and reciprocating skeleton oil seal. Widely used in gasoline engine crankshafts, diesel engine crankshafts, gearboxes, differentials, shock absorbers, engines, axles and other parts.

There are two types of gaskets. Static and dynamic seals.