gasket和washer的差别？ washer主要是用于螺纹紧固件，起均布负荷的作用，上面第一张图片属于split型的，还有星形等： （ http:///wiki/washer_ (hardware) 有图可参考） a washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener. other uses are as a spacer, spring (belleville washer, wave washer), wear pad, preload indicating device, and locking device. rubber washers are also used in taps (valves) where they form the seal that shuts off the flow of liquid or gas. rubber or silicone washers may also be used to reduce vibration when fastening fans to computer cases. usually washers have od (outer diameter) about twice their id (inner diameter). washers are usually metal or plastic. high quality capscrews require hardened steel washers to prevent the loss of pre-load due to brinelling after the torque is applied. rubber or fiber gaskets used in taps to stop the flow of water are sometimes referred to colloquially as washers; while they may look similar, however, washers and gaskets are usually designed for different functions and made differently. washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminum surfaces. gasket对接表面的机械密封，很多仍需要配套的washer来保证密封效果： （ http:///wiki/gasket ） a gasket is a mechanical seal that fills the space between two objects, generally to prevent leakage between the two objects while under compression. gaskets save money by allowing "less-than-perfect" mating surfaces on machine parts which can use a gasket to fill irregularities. gaskets are commonly produced by cutting from sheet materials, such as gasket paper, rubber, silicone, metal, cork, felt, neoprene, nitrile rubber, fiberglass, or a plastic polymer (such as polychlorotrifluoroethylene). gaskets for specific applications may contain asbestos. it is usually desirable that the gasket be made from a material that is to some degree yielding such that it is able to deform and tightly fills the space it is designed for, including any slight irregularities. many gaskets require an application of sealant directly to the gasket surface to function properly.查看更多
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