How is the flange connected to the axis
First of all, if it's a pipe, there's a fluid in it, and it's going to need to be made. If the shaft is solid, link directly to the flange, and two pairs of paired flanged flanged open drill.
The flange is the part of the pipe that connects the pipe to the pipe. Flange connection or flange connection, it is to point to by the flanges, gaskets and bolts are mutually connected as a set of sealing structure folding connection, pipe flange refers to the plumbing for piping flange, used in equipment refers to the import and export of the flange of the equipment. The flange join structure is a composite, consisting of a pair of flanges, several bolts, nuts and a gasket. In practical application, the connection or destroyed by the strength of the connection flange seal failure caused is very rare, more because of the bad sealing and leakage. The main problem in the design of the flange join is to prevent the leakage of the medium. Flange sealing principle is: The flange is pressed by the bolt and the gasket is pressed between the sealing surface. On unit area of pressure (pressure stress) must reach a certain value to deform the gasket by compaction, seal surface formed by machining micro gap fill up, form the initial seal condition. The required compression stress is called gasket seal ratio pressure, which is expressed in y as MPa.
It is. The seal ratio pressure is determined mainly by the gasket material. Obviously, when the gasket material is determined, gasket is wider, in order to ensure the proper than the pressure, the greater the pre-tightening force needed for the gasket, and thus the size of the bolt and the flange is required, the greater the gaskets should not be too wide so flange connection, more should not be covered the whole flange gaskets. When equipment or piping in working state, within the medium pressure form the axial force of bolt tensile, and flange sealing surface along the direction, separated from each other to reduce the pressure between the sealing surface and the gasket stress. If the gasket has the enough ability to rebound, enable compression deformation response to compensate the bolt and the deformation of the sealing surface and make the pre tight sealing pressure value to at least not less than a certain value (the specific pressure value is called working seal pressure), can maintain good sealing condition between the flange sealing surface.
On the other hand, the rebounces of the gaskets are insufficient, and the pre-tight seal is reduced to the work seal by the pressure, and even the sealing is reappeared in the sealing area. In order to realize the seal, flange connection, therefore, must take the seal assembly deformation and operating conditions of each part of seal condition, even if the sealing element under the effect of operating pressure, still maintain a certain amount of residual compression force. For this reason, bolts and flanges must have sufficient strength and stiffness to make the axial force of the bolts not too much deformation.
