Structural Methods to Improve the Radial Compressive Force of Chemical Pump Seals

In order to chemical packing packing along the length of the packing material radial compression force distribution as uniform as possible, and the leakage medium pressure distribution trends as much as possible. Its main purpose is to reduce wear and unevenness of the shaft and packing, while meeting the sealing requirements. The following measures may be taken: Structural approach to improve the radial compression force of a chemical pump seal (a) A stepped structure with variable cross section. This can be from the gland to the bottom of the ring at the section of the filler section of the narrowing of the radial pressure gradually increased near the medium pressure distribution. (b) Double stuffing box segmented compression structure. The two stuffing boxes are axially superposed so that the bottom end of the post-lettering body also serves as the gland for the pre-function body. When the total number of packing rings is large, the stuffing rings are loaded into the front and back of the body in sections so as to make the pressing force more uniform and improve the sealing ability. (c) Gland self-tightening structure. This can make use of the pressure of the fluid medium to directly act on the front face of the gland so as to increase the pressing force of the packing at the end of the medium and also make the distribution of the pressing force more reasonable along the axial direction. When the medium pressure is increased, This effect will be stronger. (d) Container structures. A set of soft packing rings are mounted in a axially displaceable metal sleeve. The preload of the packing and sleeve is adjusted by the gland bolts (spring under the nut). Working pressure due to the role of media in the sleeve bottom, and further compress the soft packing, an increase of the sleeve at the bottom of the soft packing on the shaft compression, so that the distribution of radial compression force along the axial and sealing medium pressure distribution Match. (e) The use of hierarchical soft packing seal structure. By the soft packing rings, metal rings, cylindrical springs alternately installed combination. It adjusts the packing force of the packing ring through the spring respectively, so as to obtain the best distribution of the radial pressing force. At the same time, the spring can also compensate the relaxation of the radial pressing force. (f) The structure is radially sealed with a soft packing. The seal is squeezed through the grease nipple into the elastic sleeve, uniform pressure from the outer periphery of the packing, so that the radial distribution of packing along the axial direction of the pressure evenly. Read more: China Building Water Exhibition Pump Valve Tube Fittings Exhibition Water Expo Xiamen Maritime Exhibition Internet + Forum Yiwu Expo Industry Interconnection (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: He Duanhui (QQ / WeChat:) http://beng.liuti.cn/ (service hotline:)