Packing shaft seal structure of improved type vertical pump

Abstract

The invention relates to a modified vertical pump stuffing shaft gland structure, which smoothly discharges air in the interior of a hollow cavity while meeting the cooling stuffing and a pump spindle and can be dismantled conveniently. The structure comprises the pump spindle, a stuffing seat, a stuffing gland cover, and a pump cover. The stuffing seat is sheathed in the pump spindle. The upper part of the stuffing seat is provided with the stuffing gland cover and the lower part of the stuffing seat is fixedly connected with the pump cover which is connected with a bearing protecting tube. The stuffing seat, the pump spindle, and the bearing protecting tube form a cavity. The structure is characterized in that the stuffing seat is sheathed on the pump spindle to form an upper annular chamber and a low annular chamber; the upper annular chamber is filled with stuffing; the low annular chamber is filled with pressure water and communicated with the cavity by a clearance between the stuffing seat and the pump spindle; an air outlet at the lower part of the stuffing seat is communicated with the cavity.

Description

(1) Technical field [0001] The invention relates to the field of water supply and drainage equipment, in particular to an improved packing shaft seal structure of a vertical pump. (2) Background technology [0002] For existing vertical pump packing shaft seal structure, see figure 1 , which includes a pump shaft 8, a packing seat 1, a packing gland 4, a water seal ring 3, a bearing protection tube 7, and a pump cover 6. The packing seat 1 is set on the pump shaft 8, and the upper part of the packing seat 1 is pressed The packing gland 4 is installed, and the cavity surrounded by the packing seat 1, the packing gland 4 and the pump shaft 8 is equipped with a packing 2, and a water seal ring 3 is installed in the cavity, and the water seal ring 3 will The filler 2 installed in the cavity is divided into upper and lower parts, the water seal ring 3 is connected to the filler sealing water joint 5, the lower part of the filler seat 1 is fastened to the pump cover 3, and the pu...

AI Technical Summary

Problems solved by technology

[0002] For existing vertical pump packing shaft seal structure, see figure 1 , which includes a pump shaft 8, a packing seat 1, a packing gland 4, a water seal ring 3, a bearing protection tube 7, and a pump cover 6. The packing seat 1 is set on the pump shaft 8, and the upper part of the packing seat 1 is pressed The packing gland 4 is installed, and the cavity surrounded by the packing seat 1, the packing gland 4 and the pump shaft 8 is equipped with a packing 2, and a water seal ring 3 is installed in the cavity, and the water seal ring 3 will The filler 2 installed in the cavity is divided into upper and lower parts, the water seal ring 3 is connected to the filler sealing water joint 5, the lower part of the filler seat 1 is fastened to the pump cover 3, and the pump cover 6 is connected to the bearing guard The pipe 7, the packing seat 1, the pump shaft 8, and the bearing protection pipe 7 form a cavity 9. The vertical pump packing shaft seal structure with the above structure is adopted, and the packing is distributed on both sides of the water seal ring, requiring cooling. Lubricating water not only cools and lubricates the packing on the upper part of the water seal ring, but also cools and lubricates the packing on the lower part of the water seal ring, and at the same time cools and lubricates the pump shaft, so the upper and lower distribution of the water flow cannot meet the sufficient cooling and lubrication requirements; at the same time, the packing seat 1, The pump shaft 8 and the bearing protection tube 7 form a cavity, and the internal gas cannot be discharged smoothly, and its air pressure is likely to cause poor water flow and damage to the water pump, and the structure is inconvenient to disassemble.

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