Mechanical seal suitable for ANSI standard pump cavity

Abstract

The invention discloses a mechanical seal suitable for an ANSI standard pump cavity. An end cover is arranged on a shaft sleeve in a sleeving mode, and a medium side seal and an atmosphere side seal are installed on the two sides of the end cover respectively and arranged on the shaft sleeve in a sleeving mode. The medium side seal comprises a medium side rotation ring, a medium side compensation ring and a medium side spring, wherein the medium side rotation ring, the medium side compensation ring and the medium side spring are sequentially installed on the shaft sleeve, one end of the medium side spring makes contacts with the medium side compensation ring, and the other end of the medium side spring is installed in the end cover. The atmosphere side seal comprises an atmosphere side rotation ring, an atmosphere side compensation ring and an atmosphere side spring, wherein the atmosphere side rotation ring, the atmosphere side compensation ring and the atmosphere side spring are sequentially installed on the shaft sleeve, one end of the atmosphere side spring makes contact with the atmosphere side compensation ring, and the other end of the atmosphere side spring is installed in the end cover. The mechanical seal has the advantages of being compact in structure, small in radial dimension and suitable for narrow space; by the adoption of balance type multi-spring design, the mechanical seal is good in sealing effect; because the springs do not make contact with medium materials and pressure borne by the whole seal is offset, the mechanical seal is capable of bearing two-way pressure and suitable for working conditions of various media.

Description

technical field [0001] The invention relates to the field of mechanical seals, in particular to a mechanical seal conforming to ANSI standard pump chambers. Background technique [0002] One of the characteristics of this standard of "Code for Horizontal End Suction Centrifugal Pumps for Chemical Processes" (ANSI / ASME B73.1M) is that the cavity for installing the seal is very narrow, which brings certain difficulties to the design of the seal. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide a mechanical seal conforming to ANSI standard pump chamber. [0004] The technical solution adopted by the present invention to achieve the above purpose is: a mechanical seal conforming to the ANSI standard pump chamber, the shaft sleeve is fitted with an end cover, and the two sides of the end cover are respectively installed with a medium side seal and an atmospheric side seal set on the shaft sleeve...

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Problems solved by technology

[0002] "Specification for Horizontal End Suction Centrifugal Pumps for Chemical Processes" (ANSI / ASME B73.1M) One of the characteristics of this standard is that the cavity for installing the seal is very narrow, which brings certain difficulties to the design of the seal.

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