sliding parts

Abstract

The present invention provides a sliding member that positively introduces a fluid over the entire sliding surface to prevent wear, burning, etc. of the sliding surface due to frictional heat generation, and to prevent leakage. A positive pressure generating mechanism (10) provided with a positive pressure generating groove (11) and a positive pressure generating mechanism (10) provided with a negative pressure generating groove are provided on at least one of the sliding surfaces of the sliding member composed of a pair of annular bodies that slide relative to each other. The negative pressure generating mechanism (12) of (13), the positive pressure generating groove (11) and the negative pressure generating groove (13) are isolated from the anti-seal fluid side by the table portion (R), and the sliding part is characterized in that The positive pressure generating groove (11) and the negative pressure generating groove (13) have deep grooves (14) arranged at least on the opposite side of the sealing fluid than the positive pressure generating groove (11) and the negative pressure generating groove (13) position, the deep groove (14) is arranged to communicate with at least the sealing fluid side.

Description

technical field [0001] The present invention relates to a sliding member suitable for, for example, mechanical seals, bearings, and other sliding parts. In particular, it relates to a sliding member such as a seal ring or a bearing that reduces friction by intervening a fluid on a sliding surface and needs to prevent fluid from leaking from the sliding surface. Background technique [0002] In a mechanical seal as an example of a sliding member, its performance is evaluated based on the amount of leakage, the amount of wear, and the torque. In the prior art, the performance is improved by optimizing the sliding material and the roughness of the sliding surface of the mechanical seal, and low leakage, high life and low torque are realized. However, due to increased awareness of environmental issues in recent years, further improvement in the performance of mechanical seals has been demanded, and technical development beyond the framework of existing technologies is required....

AI Technical Summary

Problems solved by technology

[0009] However, the above-mentioned prior art is excellent in that it does not leak when it is at rest, it works by fluid lubrication during the rotation including the initial rotation, and it can prevent leakage and take into account both sealing and lubrication. However, the present invention It has been confirmed that there may be a problem that since the pressure relief groove 45 is provided between the groove portion 35 of the positive pressure generating mechanism and the groove portion 36 of the negative pressure generating mechanism, and the negative pressure generating mechanism is provided on the low-pressure fluid side which is the leakage side, Therefore, the fluid on the high-pressure fluid side cannot be introduced into the low-pressure fluid side of the sliding surface 32, and the liquid film interruption occurs on the sliding surface on the low-pressure fluid side, and wear and burning of the sliding surface caused by frictional heat are generated. etc., thereby reducing the function of the mechanical seal

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