Shaft sealing device of sliding part

Abstract

Abstract PURPOSE:To increase durability of a seal part, stabilize its quality, and facilitate assembly and adjustment, by tightening a needle valve packing through tightening of an auxiliary packing which is made of elastic body such as rubber and placed in the needle valve packing. CONSTITUTION:An elastic rubber body, of which an auxiliary packing 2 is formed, is pressed at the inside of a recess 1' by a conical projecting part 3' of a packing support 3, and as a result, it works to press a main packing 1 with an uniform pressure. Further, in case, wear (a) occurs to the main packing 1 as a result of sliding of a needle valve rod 6 during operation, further tightening of a packing pusher 5 causes the auxiliary packing 2 made of elastic rubber to press the main packing 1 against the needle valve rod 6 with a continuously constant force to maintain a sealing effect.

Inventors

• 👤 Teruyuki Oba
• 👤 大庭　照之
• 👤 Kazuo Arai
• 👤 一男 新井
• 👤 Atsushi Yahagi
• 👤 矢萩　淳
• 👤 Shigeru Iwakoshi
• 👤 岩腰　茂

Bibliographic Details