Centrifugal pump mechanical seal is made up of what parts?

Centrifugal water pump type many, usually in the form of mechanical seal centrifugal water pump and mechanical seal is a lot of more phyletic, what are the parts for mechanical seal? The structure of auxiliary sealing element friction pair of dynamic and static ring structure adopted by the often depends on the form of auxiliary sealing element. Auxiliary sealing element has two kinds: the radial contact auxiliary seal with bellows seal. 1, radial contacting auxiliary seal radial contact auxiliary seal including ring sealing ring and static ring sealing ring, which constitute a ring and shaft, the static ring and seal between the end cover. Can at the same time, because the seal material has elasticity, elastic supporting effect to the seal ring, and the skew of the seals and shaft vibration has certain compensation and vibration absorbing effect, can improve the seal face joint degrees. After the end wear, under the effect of elastic force, the sealing ring with the compensation loop make small compensation movement along the axial direction. Used as the main auxiliary seal ring and static ring are shown in figure 3 kinds of cross section shape. Commonly used with o-type and V two kinds, there are square, wedge, rectangular, cladding, etc. Is usually determined according to the conditions of use. Such as general medium can be used in a o-ring, solvents, strong oxidizing medium of v-type ptfe ring are available, and high temperature can use flexible graphite or fluorine plastic wedge ring, rectangular pad generally only used in figure ( f) In the form. Fluorine plastic coated rubber all 0 0 ring can be used in ordinary rubber ring cannot adapt to environment of certain chemical medium. It is a combination of rubber ring 0 has low compression permanent deformation performance, and fluorine plastic special heat resistant, cold resistant, oil resistance, abrasion resistance, ageing resistance, chemical corrosion medium resistance and other properties, can replace part of the traditional rubber o-ring, widely used in the - 60 ~ 200 ℃ temperature range, in addition to the halide, molten alkali metals and fluorine carbon compounds sealing occasions of various kinds of medium. 2 corrugated pipe, corrugated pipe transmission is elastic element, auxiliary sealing and torque transmission mechanism of sealing components. Its means of transmission of torque is bellows mechanical seal, the ends of the corrugated pipe respectively connected to the driving seat and ring, as for the connection depends on the corrugated pipe materials. For example, for metal corrugated pipe welding; For rubber bellows and ptfe bellows, j adopts integral connection or other methods. Rotating shaft through a tight set screw, the key institutions such as transfer torque to the transmission, drive a corrugated pipe by the torque to the ring. 3, corrugated pipe auxiliary seal corrugated pipe has the function of the auxiliary seal. Bellows seal friction pair is the characteristics of flexible installation ring all the relative displacement can be compensated by elastic corrugated pipe, this allows the installation of friction pair sealing ring have larger deviation. There is no radial contact auxiliary seal ring along the sealing surface slip problem. 4, transmission form ring need with the axis of rotation, in order to have certain floating ring, generally it is not directly fixed on the rotating shaft, usually between the ring and the shaft, needs to have a torque transfer mechanism, ring rotates, and overcome the friction torque of mixing and end face. Torque transmission mechanism in transfer of torque at the same time, can't get in the way of compensation mechanism of compensation and sealing ring floating vibration reduction ability. Shaft torque transfer to common institutions of sealing components have set screws, pins, flat key and split ring, etc.
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