SHAFT SEALING STRUCTURE AND PRIMARY-COOLING-MATERIAL-CIRCULATING PUMP

Provided are a shaft sealing structure capable of lengthening the endurance time during which the leakage of fluid is prevented and a reactor coolant pump. The shaft sealing structure includes a seal ring (1) that has abutment portions (7) formed by dividing the seal ring (1) along the axial directi...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	SAEKI, KENTAROU, KUZUMI, HIROSHI, OTANI, TAKANOBU, ITO, HITOSHI, IKEDA, YASUHIRO, HANADA, TOMOKI, SAKUMA, HIROOMI, UEHARA, HIDEKAZU, UMEDA, AKIHIKO, HARADA, YUJI, SAKAI, MASARU, TAKAYAMA, YASUSHI, MATSUO, TOSHIHIKO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CYLINDERS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS PISTONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SEALINGS THERMAL INSULATION IN GENERAL WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Provided are a shaft sealing structure capable of lengthening the endurance time during which the leakage of fluid is prevented and a reactor coolant pump. The shaft sealing structure includes a seal ring (1) that has abutment portions (7) formed by dividing the seal ring (1) along the axial direction and that is provided around a main shaft (10) in a ring-like manner; a support member (6) that is provided in the seal ring (1) along the circumferential direction of the main shaft (10), that is moved toward the center of the main shaft (10) while being brought into contact with the seal ring (1), and that is moved relative to the seal ring (1) along the circumferential direction of the main shaft (10); and a thermoswitch (3) that is connected to the support member (6) between the abutment portions and that presses the support member (6) toward the center of the main shaft (10) when the temperature rises to a temperature higher than that during normal operation, in which the seal ring (1) is fixed at a position separated from the main shaft (10) during the normal operation and is moved by the support member (6) toward the center of the main shaft (10) when the temperature rises to a temperature higher than that during the normal operation.