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A rod seal

A seal and shaft seal technology, which is applied in the field of U-shaped seals, can solve the problems of shortened seal life, accelerated seal wear, and reduced seal thickness, so as to reduce the fastening force and prevent the sealing function. Reduce and inhibit the effect of contraction

Active Publication Date: 2019-06-18
MITSUI E&S MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there is a problem that a large power is required for the driving force of the shaft, or the wear of the seal is promoted
On the other hand, when the cross-sectional area of ​​the contact portion becomes small, there is no margin for wear, and the life of the seal becomes short
That is, the thickness of the seal becomes smaller and the durability against abrasion decreases, that is, the so-called becomes easy to break

Method used

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  • A rod seal
  • A rod seal
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Examples

Experimental program
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Embodiment Construction

[0091] Hereinafter, the rod packing according to the present invention will be specifically described based on preferred embodiments shown in the drawings.

[0092] Figure 1 ~ Figure 4 The rod packing 10 according to the first embodiment is shown.

[0093] figure 1 The state where the rod packing 10 is mounted on the shaft 3 is shown, and the rod packing 10 is housed in the stuffing box 4 and mounted on the shaft 3 . The rod seal 10 is a U-shaped seal having a substantially U-shaped cross section in the circumferential direction, and is constituted by combining an inner annular member 11 and an outer annular member 12 .

[0094] figure 2 The inner annular member 11 is shown, and a circumferential cross-section taken along a plane perpendicular to the circumferential direction of the ring is shown. Such as figure 2 As shown, the cross section in the circumferential direction is substantially U-shaped, and inner ring side flanges 11a protruding toward the outside of the...

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Abstract

Provided is a rod seal that maintains a sealed state while maintaining a state of contact with a shaft even when wear occurs or expansion occurs due to temperature changes, wherein an inner side annular component with the U-shaped section in the circumferential direction is contained in an outer side annular component with the U-shaped section to form the rod seal in a combined mode; when the rodseal is contained in a stuffing box middle rod and installed on the shaft, one part of the inner circumferential side of the inner ring flange part of the inner side annular component makes contact with the shaft to form a sealed state. A part of the outer peripheral side of the inner ring flange part is in contact with the inner side surface of the top wall of the stuffing box to form a sealed state; furthermore, when an inner ring-side cutout and an outer ring-side cutout are formed in the inner ring flange part and the outer ring flange part, these cutouts can absorb expansion and contraction due to temperature changes, thereby suppressing the expansion and contraction of the rod seal itself.

Description

technical field [0001] The present invention relates to a rod packing for a shaft seal between a shaft and a casing, and more particularly to a U-shaped packing having a U-shaped cross section. Background technique [0002] A rod seal is a type of shaft sealing device disposed between a shaft performing rotational motion or reciprocating linear motion and a housing or the like for supporting the shaft. In the piston-cylinder mechanism in which the piston performs reciprocating linear motion in the cylinder, the rod seal is connected and fixed on the housing, and the rod seal is in contact with the piston rod to seal between the shaft and the housing, allowing the piston rod to linear motion. [0003] In the piston-cylinder mechanism, fluid such as liquid and air is sucked into the cylinder by the backward movement of the piston, and the fluid in the cylinder is ejected by the forward movement of the piston. Since the ejected fluid is in a compressed state, it reaches a hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/26F16J15/16
Inventor 田中正纪石原修二
Owner MITSUI E&S MACHINERY CO LTD
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