The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2022
Filed:
Jan. 06, 2021
Flowserve Management Company, Irving, TX (US);
Cheng-Kang Guan, Murrieta, CA (US);
Daniel A. Nelson, Temecula, CA (US);
Chris John Riché, Jr., Murrieta, CA (US);
Flowserve Management Company, Irving, TX (US);
Abstract
An end face mechanical seal for a high pressure, compressible fluid includes metal or ceramic seal faces separated by a seal gap having at least one supersonic region that accelerates the fluid in the leakage direction, producing a shockwave that reduces fluid pressure to significantly reduce viscous heating and gap length. A choke width of the seal gap formed between the converging and diverging segments of the first supersonic region is between 50 and 200 micro-inches, and upper and lower boundaries thereof are flat, with combined slopes of less than 10 degrees. A total length of all of the supersonic regions is less than 0.1 inches. A non-supersonic region can further reduce fluid pressure by inducing viscous stresses. The seal can be configured axially or radially, and can be used as a pre-conditioner in combination with a conventional downstream mechanical fluid seal.