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Sliding component

A sliding part and sliding surface technology, which is applied to rotating parts that resist centrifugal force, engine components, sliding contact bearings, etc., can solve the problems of high lubricity of sliding surfaces and insufficient lubrication of sliding surfaces.

Active Publication Date: 2021-11-16
EAGLE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in Patent Documents 1 and 2, a positive pressure is generated centering on a plurality of front end portions or sharp portions arranged in parallel on the same circumference, thereby increasing the radial pressure gradient on the sliding surface, making it difficult to A uniform liquid film is formed in a large area. As a result, high lubricity cannot be obtained on the entire sliding surface, and the sliding surface may be in a state of insufficient lubrication.
In addition, in Patent Document 2, the liquid film of the sealed liquid is formed centering on a plurality of tips arranged in parallel on the same circumference, so there is a problem that when the sliding member rotates relatively, the sealed liquid on the sealed liquid side The gas-liquid interface with the atmosphere on the leak side will be fixed in a specific narrow range in the radial direction

Method used

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Experimental program
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Embodiment 1

[0052] For the sliding parts involved in embodiment 1, refer to Figure 1 to Figure 3 , for illustration. In addition, in the present embodiment, a method in which the sliding member is a mechanical seal is taken as an example for description. In addition, the outer diameter side of the sliding member constituting the mechanical seal will be described as the sealed liquid side (high pressure side), and the inner diameter side will be the atmospheric side (leakage side, low pressure side). In addition, it is not limited to this, and the sealed liquid side may be a low-pressure side, and the leakage side may be a high-pressure side. In addition, the sealed fluid is not limited to this liquid, and may be gas, for example, air. In addition, for convenience of description, in the drawings, dots may be attached to grooves and the like formed on the sliding surface.

[0053] figure 1 The mechanical seal for general industrial machinery shown is an inside mechanical seal, which se...

Embodiment 2

[0069] Next, for the sliding member related to the second embodiment, refer to Figure 4 to Figure 7 , for illustration. In addition, descriptions of configurations that overlap with those of the first embodiment are omitted.

[0070] Such as Figure 4 and Figure 5 As shown, on the sliding surface 11 of the stationary seal ring 101 , a plurality of V-shaped dynamic pressure generating mechanisms 141 with their sharp ends facing the downstream direction are evenly arranged in the circumferential direction of the stationary seal ring 101 . For the dynamic pressure generating mechanism 141, one of the two sides of the V-shape that is open and communicated to the sealed liquid side is equivalent to the positive pressure generating groove 15 that is recessed in a straight line toward the atmospheric side while being inclined to the downstream side. The other side of the continuous pressure generating groove 15 corresponds to the negative pressure generating groove 171 that is l...

Embodiment 3

[0088] Next, for the sliding member involved in Embodiment 3, refer to Figure 8 to Figure 11 , for illustration. In addition, descriptions of configurations that overlap with those of the second embodiment are omitted.

[0089] Such as Figure 8 to Figure 10 As shown, the sliding surface 11 of the stationary seal ring 103 is evenly arranged with a plurality of dynamic pressure generating mechanisms 143 in the circumferential direction. The positive pressure generating groove 15 is constituted independently of the second positive pressure generating groove 173 that extends toward the atmosphere side while inclining toward the upstream side. In addition, the number of the second positive pressure generating grooves 173 is the same as that of the positive pressure generating grooves 15 , and they are arranged correspondingly so as to be located on the same radius.

[0090] The positive pressure generating groove 15 has an opening 15a open and communicated to the sealed liquid...

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Abstract

Provided is a sliding component with which a high lubrication property can be obtained across the entire sliding surface. The annular sliding component 10, which is arranged at a location of a rotary machine that undergoes relative rotation, has a sliding surface on which a plurality of positive pressure generation grooves 15, which generate positive pressure when a sealed fluid F on a sealed fluid side is introduced during relative rotation of sliding components 10 and 20, are arranged side by side in the circumferential direction. Each positive pressure generation groove 15 has a tip-most end portion 9a at the tip-most end on the downstream side in the direction of relative rotation, and at least a portion of the plurality of tip-most end portions 9a, which are arranged side by side in the circumferential direction, are arranged at mutually different positions in the radial direction.

Description

technical field [0001] The present invention relates to relatively rotating sliding parts, such as sliding parts used in shaft sealing devices for sealing the rotating shafts of automobiles, general industrial machinery or other rotating machinery in the field of sealing, or in the field of automobiles, general industrial machinery or other bearings Sliding parts used in mechanical bearings. Background technique [0002] As a shaft sealing device for preventing leakage of a sealed liquid, for example, a mechanical seal includes a pair of ring-shaped sliding members whose sliding surfaces slide relative to each other and rotate relative to each other. In such a mechanical seal, in recent years, in order to protect the environment, etc., it is desired to reduce the energy lost due to sliding, and some positive seals are provided on the sliding surface of the sliding member to communicate with the high-pressure sealed liquid side and block one end of the sliding surface. Press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/04F16J15/34
CPCF16C17/045F16C33/74F16J15/34F16J15/342F16J15/3416F16C2300/02F16J15/164F16C33/741
Inventor 井村忠继
Owner EAGLE INDS