Mechanical seal structure of a high pressure rotor pump

Abstract

The invention belongs to the technical field of high-pressure rotor pumps and particularly relates to a mechanical seal structure of a high-pressure rotor pump. The mechanical seal structure of the high-pressure rotor pump comprises transmission shafts. One side of each transmission shaft is provided with a rotor, and the other side of each transmission shaft is provided with a bearing cover plate. A groove is formed between each rotor and the corresponding transmission shaft. A spring is arranged in each groove. A movable ring is installed in each groove in an inserted manner. Each movable ring and the corresponding transmission shaft are fixed through a movable ring anti-rotation pin. The left side of each movable ring is provided with a static ring. Each static ring is isolated from a framework oil seal through a static ring seat, wherein the outer circumference of the static ring and the framework oil seal is sleeved with the static ring seat. A static ring anti-rotation pin is arranged between each static ring seat and the corresponding static ring. An oil seal baffle is arranged on the left side of each framework oil seal. Each oil seal baffle does not make contact with the corresponding bearing cover plate. The mechanical seal structure of the high-pressure rotor pump can effectively prevent a lubricating medium at the bearing end from permeating into the mechanical seal structure, bear large pump pressure and keep a good seal effect.

Description

technical field [0001] The invention belongs to the technical field of high-pressure rotor pumps, in particular to a mechanical seal structure of a high-pressure rotor pump. Background technique [0002] At present, the existing mechanical seals of rotor pumps are generally of the external outflow and spring reverse push type. Due to structural reasons, there are many leakage points and a large amount of leakage, and the leaked material is easy to enter the bearing end of the gearbox; in addition, the non- The force on the end face of the balanced mechanical seal changes greatly with the increase of the medium pressure, so it can only be applied to low-pressure mechanical seals, and the known balanced mechanical seal structure bears limited pressure, and most of the working pressure is less than or equal to 1.6MPa If the pressure is higher than this value, it is easy to leak, which will cause the failure of the mechanical seal and reduce the service life. Therefore, there is...

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Problems solved by technology

[0002] At present, the existing mechanical seals of rotor pumps are generally of the external outflow and spring reverse push type. Due to structural reasons, there are many leakage points and a large amount of leakage, and the leaked material is easy to enter the bearing end of the gearbox; in addition, the non- The force on the end face of the balanced mechanical seal changes greatly with the increase of the medium pressure, so it can only be applied to low-pressure mechanical seals, and the known balanced mechanical seal structure bears limited pressure, and most of the working pressure is less than or equal to 1.6MPa If the pressure is higher than this value, it is easy to leak, which will cause the failure of the mechanical seal and reduce the service life. Therefore, there is a lack of a mechanical seal structure on the market that can ensure less leakage points, reliable sealing, and can withstand greater pump pressure.

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