Fastening nut for medium-low pressure cylinder communicating pipe

• Main Authors: XU WUHUA, XIAO JUN, CAO JUNSHUI, LI RUFEI, XIE YONGXIANG, WANG SICHENG
• Format: Patent
• Language: Chinese; English
• Published: 15.07.2022
• Subjects: BLASTING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model discloses a fastening nut for a medium and low pressure cylinder communicating pipe, which comprises a nut body, one end of the nut body is closed, a first cylindrical hole and a second cylindrical hole are arranged in the nut body, the first cylindrical hole is communicated with the second cylindrical hole, the diameter of the second cylindrical hole is slightly larger than that of the first cylindrical hole, and the diameter of the second cylindrical hole is larger than that of the second cylindrical hole. An internal thread is arranged on the inner wall of the first cylindrical hole, an axial strip-shaped groove is formed in the inner wall of the first cylindrical hole, and the second cylindrical hole is communicated with the outside through the strip-shaped groove. According to the utility model, external air can be prevented from entering the outer cylinder of the low-pressure cylinder of the steam turbine in a negative pressure state through the gap between the fastening bolt external