Liquid film non-contact type seal structure

Abstract

The invention discloses a liquid film non-contact type seal structure mainly comprising a lip pressure plate (1), a shaft sleeve (2), a lip (3), a seal box (4), an O-ring 1 (5), an anti-rotating pin 1 (6), an O-ring 2 (7), a medium side fixed ring (8), a screw 1 (9), a medium side movable ring (10), a spring (11), a connecting sleeve (12), an atmosphere side movable ring (13), an O-ring 3 (14), an anti-rotating pin (15), an atmosphere side fixed ring (16), a packing sheet (17), a hexagon bolt (18), a top thread 1 (19), a transmission ring (20), a top thread2 (21), a pressure cover (22), a screw 2 (23), an O-ring 4 (24), a clamp ring (25), an O-ring 5 (26), a push ring (27), a top thread 3 (28), a spring seat (29), an O-ring 6 (30), a liquid proof ring 1 (31), a liquid proof ring 2 (32), an O-ring 7 (33), an O-ring 8 (34) and a screw 3 (35). Direct solid friction wearing is formed between existing contact type seal end faces, thus causing early failure between seal end faces by over high temperature rise and excessive wearing; the novel liquid film non-contact type seal structure can solve said problems.

Description

technical field [0001] The invention relates to the technical field of liquid film sealing, in particular to a liquid film non-contact sealing structure. Background technique [0002] With the continuous development of chemical industry, electric power, oil refining and other industries, the requirements for mechanical seals are becoming more and more stringent. For sites such as toxic, harmful, high-solid and corrosive media, zero leakage and zero escape are basically required. At present, most pumps use contact mechanical seals. Although contact seals have a wide range of applications, their limitations make them less and less suitable for the development of modern industry. [0003] As mentioned on page P40 of the second edition of "Mechanical Seal Technology and Application", the mechanical seals for rotary pumps (mainly centrifugal pumps) at home and abroad are basically ordinary contact mechanical seals. Friction and wear, leading to early failure of the seal due to e...

AI Technical Summary

Problems solved by technology

At present, most pumps use contact mechanical seals. Although contact seals have a wide range of applications, their limitations make them less and less suitable for the development of modern industry.

[0003] As mentioned on page P40 of the second edition of "Mechanical Seal Technology and Application", the mechanical seals for rotary pumps (mainly centrifugal pumps) at home and abroad are basically ordinary contact mechanical seals. Friction and wear, leading to early failure of the seal due to excessive friction temperature rise and excessive wear on the end face

Under the harsh conditions of the sealing environment, such as the medium that is easy to vaporize, highly dangerous, highly corrosive, high in solid particles, and high pv value, there will be a large number of liquid phase leakage and gas phase escaping to pollute the environment. The reliability and stability of the seal are greatly reduced, and the probability of failure is significantly increased, making it difficult to meet the objective requirements of modern industrial production such as long-term operation, no pollution, and low energy consumption.

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