Double-end-face sealing device capable of eliminating accumulated errors and used for pump and eliminating method

Abstract

The invention relates to the field of fluid machinery technical equipment, in particular to a double-end-face sealing device capable of eliminating accumulated errors and used for a pump and an eliminating method. The double-end-face sealing device capable of eliminating the accumulated errors and used for the pump comprises a pump shaft, a shaft sleeve, a front sealing assembly, a rear sealing assembly and a sealing gland, and an accumulated error eliminating mechanism is arranged on the shaft sleeve; and the accumulated error eliminating mechanism comprises a transmission shifting fork and a mechanical seal spring, adjusting gaps are formed between the transmission shifting fork and the front sealing assembly and between the transmission shifting fork and the rear sealing assembly respectively, and the front sealing assembly and the rear sealing assembly each comprise a check ring, a movable ring base, a movable ring, a static ring and a static ring base. By means of the eliminating method for the double-end-face sealing device capable of eliminating the accumulated errors and used for the pump, the double-end-face sealing device capable of eliminating the accumulated errors and used for the pump is installed in a shell, the positions of the shaft sleeve and the transmission shifting fork relative to the front sealing assembly and the rear sealing assembly are adjusted according to the maximum accumulated error of pump part machining; and by means of the double-end-face sealing device and the eliminating method, the accumulated errors can be eliminated, the spring compression amount is not changed, and disassembly and assembly are convenient.

Description

technical field [0001] The invention relates to the field of fluid machinery technical equipment, in particular to a pump double-end sealing device and a method for eliminating accumulated errors. Background technique [0002] Direct-coupled chemical pumps are widely used in chemical plants due to their simple structure, easy disassembly, and low price. As direct-coupled chemical pumps are more and more widely used, the media they transport are becoming more and more diverse , including conveying high-temperature, toxic and harmful media. For conveying dangerous, toxic and other harmful media, the mechanical seal of the chemical pump must ensure the safety of the media seal. After the direct-connected chemical pump of the conventional structure is assembled, multiple pump parts are The accumulation of dimensional tolerances has completely exceeded the allowable range, resulting in the spring compression of the front and rear sealing surfaces of the double-ended mechanical se...

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Problems solved by technology

[0002] Direct-coupled chemical pumps are widely used in chemical plants due to their simple structure, easy disassembly, and low price. As direct-coupled chemical pumps are more and more widely used, the media they transport are becoming more and more diverse , including conveying high-temperature, toxic and harmful media. For conveying dangerous, toxic and other harmful media, the mechanical seal of the chemical pump must ensure the safety of the media seal. After the direct-connected chemical pump of the conventional structure is assembled, multiple pump parts are The accumulation of dimensional tolerances has completely exceeded the allowable range, resulting in the spring compression of the front and rear sealing surfaces of the double-ended mechanical seal being too tight or too loose, resulting in an unreliable sealing system when the conventional direct-coupled chemical pump is running; In addition, in the prior art, the shaft sleeve and the pump shaft are usually fixedly connected by a locking mechanism, the installation and operation space is narrow, and it is inconvenient to disassemble

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